<script data-pm-proxy="intercept"></script><?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:googleplay="http://www.google.com/schemas/play-podcasts/1.0"><channel><title><![CDATA[AI, Data, Digital Twins, and Information]]></title><description><![CDATA[An honest career story, and short letters simplifying AI, digital twins, data strategy, and the modeling, mathematics, and engineering skills for the AI and data driven industries. Life and culture lessons that I learned the hard way 😉. ]]></description><link>https://halanelson.substack.com</link><image><url>https://substackcdn.com/image/fetch/$s_!waGp!,w_256,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F442e3d5e-e2f2-489b-83f5-d1618bcd43f3_1280x1280.png</url><title>AI, Data, Digital Twins, and Information</title><link>https://halanelson.substack.com</link></image><generator>Substack</generator><lastBuildDate>Tue, 01 Sep 2026 10:33:36 GMT</lastBuildDate><atom:link href="/__u/halanelson.substack.com/feed" rel="self" type="application/rss+xml"/><copyright><![CDATA[Hala Nelson]]></copyright><language><![CDATA[en]]></language><webMaster><![CDATA[halanelson@substack.com]]></webMaster><itunes:owner><itunes:email><![CDATA[halanelson@substack.com]]></itunes:email><itunes:name><![CDATA[Hala Nelson]]></itunes:name></itunes:owner><itunes:author><![CDATA[Hala Nelson]]></itunes:author><googleplay:owner><![CDATA[halanelson@substack.com]]></googleplay:owner><googleplay:email><![CDATA[halanelson@substack.com]]></googleplay:email><googleplay:author><![CDATA[Hala Nelson]]></googleplay:author><itunes:block><![CDATA[Yes]]></itunes:block><item><title><![CDATA[What Most People Get Wrong About the Data Center Debate]]></title><description><![CDATA[And where to shift it to...]]></description><link>https://halanelson.substack.com/p/what-most-people-get-wrong-about</link><guid isPermaLink="false">https://halanelson.substack.com/p/what-most-people-get-wrong-about</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Wed, 05 Aug 2026 19:42:14 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!t6T3!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F97243bb9-7efc-4dae-9735-726f0c3e7381_1392x2000.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>What most people get wrong about the data center debate:</p><p>&#9889; &#8220;They&#8217;ll raise my electricity bill.&#8221;</p><p>Only grid-connected ones can. Behind-the-meter facilities build their own power, completely disconnected from the public grid. Zero ratepayer impact. This distinction is important.</p><p>&#128167; &#8220;They consume massive water.&#8221;</p><p>Older evaporative cooling did. Modern closed-loop liquid cooling recirculates coolant with minimal consumption. The outrage targets technology most new builds no longer use.</p><p>&#128499;&#65039; &#8220;It&#8217;s one political side.&#8221;</p><p>Both extremes. The Freedom Caucus and AOC are aligned: far right calls it overreach, far left calls it exploitation. We have 833 opposition groups across 49 states. 75 projects worth $130B blocked in Q1 2026. New York just imposed the first state moratorium.</p><p>&#127464;&#127475; &#8220;It&#8217;s all grassroots.&#8221;</p><p>Not entirely. OpenAI&#8217;s June 2026 report documented Chinese accounts generating anti-data center content targeting US communities. The motive: slow American compute capacity. Legitimate local concerns and manufactured opposition both exist; conflating them hurts everyone.</p><p>&#128205; &#8220;Build them anywhere.&#8221;</p><p>AI inference needs low-latency fiber routes. Training needs massive reliable power. Existing infrastructure is a hard constraint.</p><p>&#128176; &#8220;Economic benefits are overstated.&#8221;</p><p>One facility can add $70M annual revenue to a $100M county budget. Thousands of construction jobs over 5-10 years plus multiplier effects. But only if we train the local workforce first.</p><p>&#128274; &#8220;The industry has been transparent.&#8221;</p><p> In Virginia alone, 80% of localities with data centers have NDAs with developers that shut the public out of decisions shaping their electricity rates for decades (Public Citizen, 2026). Dominion projects residential bills could double by 2035 to subsidize data center infrastructure. Community benefit agreements covering hiring, traffic, noise, and emissions are the minimum.</p><p>&#127757; &#8220;It&#8217;s just a tech issue.&#8221;</p><p>AI leadership is a compute race. Whoever builds the infrastructure controls the capability. 12,000 drones operated in a single area in the Russia-Ukraine conflict. In-Q-Tel (US intelligence venture fund) just took a board seat at a major developer. This is national security.</p><p>Brookings this week: &#8220;Americans don&#8217;t know how to fight AI. So they&#8217;re fighting data centers.&#8221; Data centers have become a proxy for broader public anxiety about AI&#8217;s effect on jobs and daily life. They&#8217;re the only physical thing people can point at and say no to.</p><p>Transparency and workforce training are very good, but until we address what&#8217;s really driving this debate, what AI means for people&#8217;s livelihoods and futures, no amount of good-neighbor agreements will be enough.</p><p><strong>#DataCenters</strong> <strong>#AI</strong> <strong>#Infrastructure</strong> <strong>#NationalSecurity</strong> <strong>#EnergyPolicy</strong></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!t6T3!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F97243bb9-7efc-4dae-9735-726f0c3e7381_1392x2000.png" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!t6T3!, /__u/halanelson.substack.com/w_424, 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6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[Water Facilities Cyber Incident]]></title><description><![CDATA[We Need Digital Twins]]></description><link>https://halanelson.substack.com/p/water-facilities-cyber-incident</link><guid isPermaLink="false">https://halanelson.substack.com/p/water-facilities-cyber-incident</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Sat, 01 Aug 2026 02:34:31 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!M9SU!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F75a661cc-df03-492a-817e-565e66600a5f_840x1152.jpeg" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>I&#8217;ve been told more than once to focus my digital twin presentations on IT because &#8220;no one cares about OT.&#8221; I focused on both, in my book too. This week is why. Water is life...</p><p>Coordinated cyberattacks hit water utilities across at least 7 US states. 30+ communities were disrupted &#8212; one plant went offline, others disconnected equipment and switched to manual operations. The FBI confirmed the attacks are spreading.</p><p>The likely path: internet-exposed PLCs connected via cellular modems, accessed using legitimate vendor engineering tools. Attackers modified controller logic, altered what operators saw on SCADA displays, and changed passwords to lock them out. No need to breach the corporate network &#8212; the field devices were directly reachable.</p><p>An AI-powered digital twin addresses this at multiple layers. It maintains a live knowledge graph of every asset, connection, and trust boundary &#8212; so an internet-exposed PLC isn&#8217;t an unknown risk, it&#8217;s a tagged, flagged, governed node. It detects anomalous telemetry patterns before operators are locked out. It computes blast radius: if this controller is compromised, what&#8217;s downstream? And it gives operators a simulation-backed response playbook rather than improvisation under pressure.</p><p>This is what our current work models&#8212; AI-powered digital twins for water system cybersecurity.</p><p><a href="https://a.co/d/09TFA3w1">AI-Powered Digital Twins</a> (Wiley, 2026) </p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!M9SU!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F75a661cc-df03-492a-817e-565e66600a5f_840x1152.jpeg" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!M9SU!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[Our ERP Is a Digital Twin. We Just Never Called It That]]></title><description><![CDATA[And how does AI help?]]></description><link>https://halanelson.substack.com/p/our-erp-is-a-digital-twin-we-just</link><guid isPermaLink="false">https://halanelson.substack.com/p/our-erp-is-a-digital-twin-we-just</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Tue, 26 May 2026 16:22:34 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!ZTKd!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fd6fe14be-52f1-491a-8962-463f39663003_1060x688.png" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>&#128202; Our ERP is a digital twin of business operations &#8212; finance, procurement, inventory, HR, manufacturing. It models our enterprise as transactions and workflows.</p><p>&#129309; Our CRM is a digital twin of customer relationships &#8212; pipeline, interactions, service history, account health.</p><p>&#9729;&#65039; Our SaaS stack &#8212; Jira, Slack, HubSpot, NetSuite, QuickBooks &#8212; each one is a digital twin of a specific business function.</p><p>&#127981; Our SCADA/DCS is a digital twin of physical processes. Our BMS is a digital twin of the building. Our MES is a digital twin of the production floor. Our EMR is a digital twin of a patient.</p><p>They all do the same thing: digitized ONE domain &#9989;</p><p>And they all move the bottleneck to the same place &#11015;&#65039;</p><p>From &#8220;we don&#8217;t have the data&#8221; to:</p><p>&#128308; Humans must enter, maintain, and reconcile data manually</p><p>&#128308; Rigid schemas that take years to implement</p><p>&#128308; 14 tools that don&#8217;t talk to each other</p><p>&#128308; Data locked in proprietary systems</p><p>&#128308; Systems that track what happened but can&#8217;t reason about what should happen next</p><p>The EHR is the most painful example &#8212; clinicians spend more time entering data than caring for patients.</p><p>What changed with AI?</p><p>&#128161; We were never meant to sit on laptops speaking machine. Entering data into forms. Writing SQL. Navigating rigid interfaces built for databases, not humans.</p><p>With AI, machine speaks human. This inverts the human-machine interface.</p><p>&#127959;&#65039; An AI-powered digital twin eliminates these bottlenecks:</p><p>&#8594; Semantic spine unifies meaning across all our systems &#8212; a Customer in Salesforce, an Account in SAP, and a Contact in HubSpot map to ONE canonical entity</p><p>&#8594; MCP servers per platform expose standardized tools that agents discover at runtime</p><p>&#8594; Event-native core preserves lineage across every system</p><p>&#8594; GenAI removes the human data-entry constraint entirely &#8212; machines observe work and populate themselves</p><p>&#8594; Natural language replaces SQL, forms, and rigid interfaces</p><p>Adding a 15th SaaS tool = writing one adapter. Not re-engineering the twin.</p><p>The pattern is the same across ALL of these systems: each digitized one domain, moved the bottleneck from missing data to fragmented data, and created silos that can&#8217;t reason across boundaries. They are all digital twins that predate the language &#128302; The architecture that connects them &#8212; unified meaning, standardized interfaces, machines that observe rather than require entry, reasoning across the boundaries these systems created &#8212; that&#8217;s what I put in my book, and it&#8217;s what we&#8217;re building now.</p><p>&#128736;&#65039; My book AI-Powered Digital Twins (Wiley, 2026) is available (pre-release price point &#128521;)</p><p><strong>&#65279;#AI</strong> <strong>#DigitalTwins</strong> <strong>#ERP</strong> <strong>#CRM</strong> <strong>#SaaS</strong> <strong>#EnterpriseAI</strong> <strong>#DataArchitecture</strong> <strong>#FutureOfWork</strong></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!ZTKd!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fd6fe14be-52f1-491a-8962-463f39663003_1060x688.png" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!ZTKd!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fd6fe14be-52f1-491a-8962-463f39663003_1060x688.png 424w, /__u/substackcdn.com/image/fetch/$s_!ZTKd!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[Offered AI For Free and They Said No ]]></title><description><![CDATA[The human side of AI adoption is the harder engineering problem]]></description><link>https://halanelson.substack.com/p/offered-ai-for-free-and-they-said</link><guid isPermaLink="false">https://halanelson.substack.com/p/offered-ai-for-free-and-they-said</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Tue, 05 May 2026 23:47:55 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!rHhR!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F677ca718-631c-479a-a7a1-04680d3bae10_1397x2015.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p> We offered to deploy AI agents for an organization at no cost. They said no.<br><br>A first instinct is "their resistance to change". But their concerns are completely rational. Those tend to follow a pattern.<br><br>* Mindset. "We've always done it this way" sounds like stubbornness, but it's often years of experience and tacit knowledge encoded into how work gets done. Disruption threatens identity as much as workflow.<br><br>* The politics of visibility. A system that exposes bottlenecks doesn't just improve operations &#8212; it redistributes who knows what. In environments where influence depends on controlling information, that's uncomfortable.<br><br>* Resource scarcity. Who guides the implementation? Who curates the data? This competes with an already overloaded workforce. Human time might be the most underestimated constraint in AI adoption.<br><br>* Sheer complexity. Larger organizations carry more legacy systems, more compliance layers, more accumulated friction. Bureaucracy often exists for a reason &#8212; it's a response to risk and scale. AI has to work within that, not around it.<br><br>* And human fallibility. People make mistakes during implementation. The gap between what we design and what gets deployed is real.<br><br>What I've seen work is starting painfully small. If a team spends 10 hours a week copying data between systems, that's the entry point &#8212; not a grand transformation vision. A 20-hour implementation that saves 5 hours weekly pays back in a month. When the math is that clear, trust follows.<br><br>The technology improves always, but will it land? That depends on something else entirely.<br><br>More on this in my new book, AI-Powered Digital Twins &#128216; Pre-release discount &#128293; <br><br>Photo today: same as yesterday, I sort of like it ;)</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!rHhR!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F677ca718-631c-479a-a7a1-04680d3bae10_1397x2015.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!rHhR!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F677ca718-631c-479a-a7a1-04680d3bae10_1397x2015.heic 424w, /__u/substackcdn.com/image/fetch/$s_!rHhR!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F677ca718-631c-479a-a7a1-04680d3bae10_1397x2015.heic 848w, /__u/substackcdn.com/image/fetch/$s_!rHhR!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F677ca718-631c-479a-a7a1-04680d3bae10_1397x2015.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!rHhR!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[The Security Fabric Is the Price of Admission ]]></title><description><![CDATA[Why your AI agents won't leave the lab until the CISO says yes]]></description><link>https://halanelson.substack.com/p/the-security-fabric-is-the-price</link><guid isPermaLink="false">https://halanelson.substack.com/p/the-security-fabric-is-the-price</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Sun, 03 May 2026 15:58:35 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!IvjA!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F244ae415-6ddd-41e8-b939-7d6c8d8d343b_2897x1886.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Nobody cares how smart your AI is if it can't pass a security review &#128272;<br>Here's what I've learned building AI-powered digital twins for enterprise:<br>The technology works. The ontology is sound. The equations compute. The agents reason, simulate, and deliver measurable ROI.<br><br>None of that matters if the CISO says no.<br><br>And the CISO will say no &#8212; unless security and governance are woven into the architecture from day one. Not added as a slide at the end. Not promised as a roadmap item. Engineered in.<br><br>This is the gap in AI adoption right now. Everyone's racing to ship agents. Almost nobody is shipping agents that can survive a compliance review &#128203;<br><br>The standards are multiplying, and they span both IT and OT:<br>* IT/Enterprise: CMMC for defense. NIST 800-171 for controlled data. NIST AI RMF for AI risk. EU AI Act for high-risk systems. SOC 2 for service trust. OWASP and DoD Zero Trust now extending specifically to AI agents.<br><br>* OT/Cyber-Physical: ISA/IEC 62443 for industrial security. NIST SP 800-82 for operational technology. DoD Zero Trust for OT. UFC 4-010-06 for facility control systems.<br><br>If your AI touches both worlds &#8212; digital twins do &#8212; you need to satisfy both.<br><br>AI needs to answer these questions before it is enterprise-ready:<br>&#128100; Does every agent have a verifiable identity? <br>&#128274; Is access deny-by-default with scoped permissions? <br>&#128221; Is every action logged immutably? <br>&#129514; Is every action simulated before it touches the real system? <br>&#128721; Can you stop a rogue agent in under five minutes?<br><br>I designed the architecture around these questions because otherwise, the technology never leaves the lab.<br><br>The security fabric is the price of admission. &#127959;&#65039;<br><br>Photos: still birthday ;)</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!IvjA!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F244ae415-6ddd-41e8-b939-7d6c8d8d343b_2897x1886.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!IvjA!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F244ae415-6ddd-41e8-b939-7d6c8d8d343b_2897x1886.heic 424w, /__u/substackcdn.com/image/fetch/$s_!IvjA!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[AI-Native vs. AI in a Trench Coat 🧥]]></title><description><![CDATA[Enterprise AI products are routing everything through a language model &#8212; even simple lookups a knowledge graph could answer in milliseconds &#127917;]]></description><link>https://halanelson.substack.com/p/ai-native-vs-ai-in-a-trench-coat</link><guid isPermaLink="false">https://halanelson.substack.com/p/ai-native-vs-ai-in-a-trench-coat</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Fri, 01 May 2026 18:00:05 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!zhU1!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc5087256-bf37-4797-886a-81a28154b716_1274x1982.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Enterprise AI products are routing everything through a language model &#8212; even simple lookups a knowledge graph could answer in milliseconds &#127917;</p><p><strong>* Tokens burned. Money spent.*</strong></p><p>The product underneath was built before AI existed &#8212; adding a chat layer on top doesn&#8217;t change that.</p><p>Here&#8217;s the question we need to be asking: where does the intelligence actually live?</p><p>&#129504; In the parameters of a language model &#8212; perceiving, reasoning over unstructured data, learning? This is expensive, powerful, and necessary... sometimes.</p><p>&#9881;&#65039; In the knowledge graph and deterministic processes &#8212; formal equations, structured reasoning, gap analysis? No tokens burned. Works on edge. Works offline.</p><p>&#129309; In a collaboration of both? The LLM perceives, the graph computes, results are governed together.</p><p>Most systems treat everything like it needs a language model. That&#8217;s like flying a helicopter to the mailbox &#128641;&#128236;</p><p>When you separate these clearly, your costs stay flat as usage grows. You can deploy on edge, on-premises, or cloud. And governance is enforced by the architecture &#8212; every path, every time.</p><p>The test: does your system know when to reason, think, and speak (Language Model) vs. when to reason and compute (graph) vs. when to do all? &#129300;</p><p>Build the architecture first. Then AI has something meaningful to reason about.</p><p>* Your AI Doesn&#8217;t Need to Think That Hard</p><p>* Not Everything Deserves a Language Model</p><p>* The Most Expensive Lookup in History &#127917;</p><p>If you&#8217;ve read up to here, photo: it&#8217;s my birthday weekend ;)</p><p><strong>#AI</strong> <strong>#DigitalTwins</strong> <strong>#EnterpriseAI</strong> <strong>#AIGovernance</strong> <strong>#Architecture</strong></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!zhU1!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc5087256-bf37-4797-886a-81a28154b716_1274x1982.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!zhU1!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc5087256-bf37-4797-886a-81a28154b716_1274x1982.heic 424w, /__u/substackcdn.com/image/fetch/$s_!zhU1!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc5087256-bf37-4797-886a-81a28154b716_1274x1982.heic 848w, /__u/substackcdn.com/image/fetch/$s_!zhU1!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[The Room is Full of People Selling Frameworks ]]></title><description><![CDATA[Governance as Engineering, Not Policy]]></description><link>https://halanelson.substack.com/p/the-room-is-full-of-people-selling</link><guid isPermaLink="false">https://halanelson.substack.com/p/the-room-is-full-of-people-selling</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Wed, 22 Apr 2026 23:54:48 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!Wl_0!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>The room is full of people selling frameworks. Vendors with sixty-slide decks. Analysts who read the Gartner report. Consultants who&#8217;ve never shipped what they&#8217;re presenting.</p><p>I&#8217;d rather be the person who designed the architecture, built the system, and can tell where it breaks. &#128161;</p><p>If our AI can act &#8212; and AI can &#8212; then someone is liable when it acts wrong. The question is whether we&#8217;ve engineered the answer to &#8220;who approved this and why&#8221; into the system itself, or whether we&#8217;re going to scramble for it after the fact.</p><p>I wrote the book on the engineering architecture for how AI should operate in safety-critical systems. And right now I&#8217;m building it &#8212; deploying governed AI agents on a critical infrastructure facility that runs with unreliable satellite and no room for an AI to make an untracked decision. &#128736;&#65039;</p><p>I think of governance as engineering, not policy. That means everything we say about AI governance has to work on hardware, not just look good on a slide.</p><p>For CEOs and leaders trying to figure out AI adoption &#8212; three decisions you can make this week, at zero cost:</p><p>&#128293; Every AI action needs a human owner. Not a team. Not a department. A person whose name is on the approval. If nobody owns it, nobody governs it.</p><p>&#128293; Define what AI cannot touch before you define what it can. Know what your data means and who it belongs to before AI gets near it (ontology-first). Customer data, production systems, legal records &#8212; draw the line first, open the door second.</p><p>&#128293; Every AI interaction should produce a record that answers: who asked, what model responded, what it said, and when (immutable event log). If something goes wrong and you can&#8217;t trace the chain from decision to outcome, you don&#8217;t have governance &#8212; you have hope. Most enterprise AI tools already support this. You just have to turn it on.</p><p>One person&#8217;s authority, one boundary, one setting. And one question your board is going to ask whether you&#8217;re ready or not. &#127919;</p><p>Now here&#8217;s the part nobody talks about:</p><p>Architecting a system and building it are two different skills. The architecture &#8212; 12 layers, ontology-first design, governed agents that are powerful but never sovereign &#8212; took a year from my brain. What I&#8217;m learning right now &#8212; Git workflows, IDE setup, localhost ports, model pulls &#8212; is implementation mechanics. &#128295;</p><p>Important? Absolutely.</p><p>Learnable? In days, not years.</p><p>Most people are learning the tools without understanding the architecture. I prefer other way around. And my way scales better ;) &#129335;&#8205;&#9792;&#65039; Tools change every quarter. Architecture principles don&#8217;t.</p><p>That&#8217;s what ontology-first buys you: the intelligence is in the structure, not in any single tool. </p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!Wl_0!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!Wl_0!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic 424w, /__u/substackcdn.com/image/fetch/$s_!Wl_0!, 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/__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic 424w, /__u/substackcdn.com/image/fetch/$s_!Wl_0!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic 848w, /__u/substackcdn.com/image/fetch/$s_!Wl_0!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!Wl_0!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F2704993f-51f4-420a-9b54-433dbca0f810_3888x1786.heic 1456w" sizes="100vw" loading="lazy"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[The Most Important Engineering Artifact Isn't Code]]></title><description><![CDATA[It's the document that makes the code inevitable]]></description><link>https://halanelson.substack.com/p/the-most-important-engineering-artifact</link><guid isPermaLink="false">https://halanelson.substack.com/p/the-most-important-engineering-artifact</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Mon, 20 Apr 2026 22:14:16 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!Wior!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fee389556-4a2a-4906-8ca8-ec43b1f0da1a_1500x736.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Just finished a 13-page build guide for an AI security platform I'm designing</p><p>.<br><br>Before writing a single line of code, I wrote the architecture. Every tool justified. Every decision documented. Every AI agent governed.<br><br>Here's my philosophy:<br><br>&#129504; Define what matters before we start collecting data. Ontology first. If we don't know what we're looking for, the data is noise.<br><br>&#129302; AI agents should be powerful but never sovereign. No agent configures its own tools. No agent escalates its own privileges. Human authority is non-negotiable.<br><br>&#128274; Design for the constraint, not around it. If the system needs to work offline, start with offline and add connectivity as a bonus &#8212; not the other way around.<br><br>&#128230; If a tool can't justify its seat at the table, it gets cut. 23 tools made the stack. Each one has a "why" next to it. If I can't write the "why," the tool doesn't belong.<br><br>&#128051; Simplicity is the hardest engineering. The entire production stack runs on one command on one machine. Getting there took weeks of decisions, not weeks of code.<br><br>The guide covers everything from "install your IDE" to "when to upgrade your hardware at scale." Built it so anyone walking into this project cold knows exactly what to do, in what order, and why.<br><br>Sometimes the most important engineering artifact is the document that makes the code inevitable, then the code, in that order. &#128161;</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!Wior!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fee389556-4a2a-4906-8ca8-ec43b1f0da1a_1500x736.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!Wior!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fee389556-4a2a-4906-8ca8-ec43b1f0da1a_1500x736.heic 424w, /__u/substackcdn.com/image/fetch/$s_!Wior!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fee389556-4a2a-4906-8ca8-ec43b1f0da1a_1500x736.heic 848w, /__u/substackcdn.com/image/fetch/$s_!Wior!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fee389556-4a2a-4906-8ca8-ec43b1f0da1a_1500x736.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!Wior!, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[From Consumer to Builder]]></title><description><![CDATA[From AI Powered Digital Twins by Hala Nelson (Wiley 2026)]]></description><link>https://halanelson.substack.com/p/from-consumer-to-builder</link><guid isPermaLink="false">https://halanelson.substack.com/p/from-consumer-to-builder</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Thu, 05 Mar 2026 23:36:49 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!by9P!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0dfe631d-3784-438b-9ff6-6e24baf82c3c_3126x1920.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Most professionals use AI as a consumer: open a tab, type a prompt, read the response. This is not a workflow. Building on the API changes that. We can assemble a working agent that runs entirely on a local machine, in an afternoon, using widely available tools. The jump from AI user to AI tool-builder is smaller than it appears &#8212; the harder leap is in thinking: from user to designer of a workflow.<br><br><strong>Engineering the Economics</strong><br>When we send a book-length document on every API call, we pay for it twice: in cost and in latency. Prompt caching solves both. We mark our static context once; the model stores it server-side and reads from cache at a fraction of the cost and with dramatically lower latency. The same instinct that drives us to index a knowledge graph rather than scan it raw applies here. We must understand the cost model of every layer we build on.<br><br><strong>Data privacy is the other economics.</strong> We cannot assume uniformity across providers. API access and consumer plans often operate under different terms, and policies evolve. Before we route sensitive documents, proprietary frameworks, or client data through any model API, we read the current terms of that provider. We verify what they retain, what they train on, and what recourse we have. We treat this the same way we treat any third-party dependency in a critical system: verify, and re-verify when terms update. For organizations with regulatory or contractual obligations, the same scrutiny extends to data residency &#8212; specifically, where data is stored at rest versus where inference actually runs, because providers draw that line differently and enterprise agreements need to account for both.<br><br><strong>Bring Your Own Model</strong><br>For some organizations, the cleanest answer to the residency problem is to remove the provider from the equation entirely. Running a capable open-weight model on owned hardware &#8212; inference that never leaves your infrastructure &#8212; eliminates a category of third-party risk, though it trades one set of costs for another: setup, sufficient compute, and the ongoing work of maintaining weights and tooling as the field moves.<br><br>Follow for more from my new book AI Powered Digital Twins <strong><a href="https://www.linkedin.com/company/john-wiley-and-sons/">Wiley</a></strong> 2026 (will be available to pre-order soon ;))</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!by9P!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0dfe631d-3784-438b-9ff6-6e24baf82c3c_3126x1920.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!by9P!, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[Model Upgrades]]></title><description><![CDATA[From my new book AI-Powered Digital Twins (coming soon, Wiley 2026)]]></description><link>https://halanelson.substack.com/p/model-upgrades</link><guid isPermaLink="false">https://halanelson.substack.com/p/model-upgrades</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Wed, 18 Feb 2026 22:23:38 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!DwBE!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5ac8c78b-d0ed-41c3-9d18-b68baaf46c90_1069x1777.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>AI models degrade over time through concept drift&#8212;the statistical properties of input data shift as the world changes, causing model accuracy to decay. A predictive maintenance model trained on equipment operating under normal conditions may perform poorly when supply chain disruptions force operation outside typical parameters. Continuous optimization requires monitoring model performance in production, detecting degradation, and triggering retraining workflows maintaining prediction quality.</p><p><strong>Retraining strategies</strong> vary by model type and operational constraints. Some models retrain continuously on streaming data, adapting to evolving patterns in near real-time. Others retrain on schedules&#8212;nightly, weekly, monthly&#8212;balancing freshness against computational costs. Critical models may maintain shadow deployments where new versions process production data without affecting outputs, enabling performance comparison before cutover. A/B testing exposes portions of traffic to candidate models, measuring improvement before full deployment.</p><p><strong>Model tuning</strong> optimizes hyper-parameters and architectures for changing requirements. As computational budgets evolve, models can be scaled up for accuracy or down for efficiency. As new data modalities become available, models can incorporate additional inputs. As understanding deepens about what matters in predictions, model architectures can be refined to emphasize relevant features. This tuning represents continuous optimization along accuracy-efficiency-interpretability tradeoffs, adapting to shifting organizational priorities and technological capabilities.</p><p><strong>Model replacement</strong> becomes necessary when architectural limitations prevent further optimization. A classical machine learning model may hit accuracy ceilings that deep learning surpasses. A deep learning model may lack the interpretability required for regulatory compliance, necessitating replacement with inherently transparent alternatives. Foundation model advances may make custom training obsolete for applications adequately served by prompted or fine-tuned general models. Replacement strategies must account for validation requirements&#8212;proving new models match or exceed predecessors&#8212;and rollback plans enabling quick reversion if replacements underperform or introduce unforeseen issues.</p><p><strong>Photo today: Then and Now:</strong></p><p><strong>* Then</strong>- I knew only AI theory, foundational and super important.</p><p><strong>* Now</strong>- I know integration, deployment, and business.</p><p>&#8216;Then&#8217; alone always felt like something big was missing... Not anymore ;)</p><p><strong>#digitaltwins</strong> <strong>#ai</strong> <strong>#models</strong> <strong>#upgrades</strong> <strong>#newbook</strong></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!DwBE!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5ac8c78b-d0ed-41c3-9d18-b68baaf46c90_1069x1777.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!DwBE!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5ac8c78b-d0ed-41c3-9d18-b68baaf46c90_1069x1777.heic 424w, /__u/substackcdn.com/image/fetch/$s_!DwBE!, 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6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[Can we Actually Implement this Architecture?]]></title><description><![CDATA[My BIG book cover REVEAL (AI Powered Digital Twins, Wiley 2026)]]></description><link>https://halanelson.substack.com/p/can-we-actually-implement-this-architecture</link><guid isPermaLink="false">https://halanelson.substack.com/p/can-we-actually-implement-this-architecture</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Fri, 13 Feb 2026 23:28:32 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!W1Fj!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Ffd1c0427-3c2c-47e5-a11b-01ada2d2d923_2048x1268.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>From the Preface:<br><br>We never interpret AI-powered digital twins as fully formed systems operating without constraint. In practice, their implementation is incremental and shaped by engineering limits, organizational realities, and safety requirements. AI agents do not directly control heterogeneous or safety-critical systems, but operate through governed interfaces and adapters, particularly in operational technology environments where deterministic behavior and certification boundaries must be preserved. <br><br>Semantic layers&#8212;ontology, knowledge graphs, tagging, and governance frameworks&#8212;emerge gradually within high-value domains rather than through enterprise-wide standardization from the outset. Simulation is similarly tiered, with fast approximations supporting operational decisions and higher-fidelity models reserved for planning and validation, recognizing that not all actions can be simulated exhaustively in real time. <br><br>Autonomous recovery applies primarily to digital and configuration layers, while physical interventions remain subject to human approval and operational procedures. Although the architectural principles that we describe scale conceptually from enterprise to national or planetary twins, implementation constraints, latency boundaries, governance models, and ownership structures differ significantly across scales. AI-powered digital twins are therefore evolving systems built progressively as integration maturity, semantic coverage, and operational trust increase.<br></p><p>Photo My BIG book cover REVEAL &#127881;!</p><p> About the cover: I love sunset colors... &#127750; I love the twins... and the copper ;)<br><br>Wiley 2026. So soon...</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!W1Fj!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Ffd1c0427-3c2c-47e5-a11b-01ada2d2d923_2048x1268.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!W1Fj!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Ffd1c0427-3c2c-47e5-a11b-01ada2d2d923_2048x1268.heic 424w, /__u/substackcdn.com/image/fetch/$s_!W1Fj!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[From the Preface, for those wondering about AI-Powered Digital Twins]]></title><description><![CDATA[Wiley 2026]]></description><link>https://halanelson.substack.com/p/from-the-preface-for-those-wondering</link><guid isPermaLink="false">https://halanelson.substack.com/p/from-the-preface-for-those-wondering</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Sat, 07 Feb 2026 22:38:21 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!4ElM!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5a2e654b-bf6d-40e3-a50f-1fe1f207a6e0_512x512.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>AI-powered digital twins are the culmination of a century of scientific and digital progress&#8212;a living mirror of physical assets, systems, and processes that ingests real-time data, runs AI-driven simulations, and optimizes performance. They unify fragmented technologies into one adaptive system where physical and digital worlds continuously inform and strengthen each other. By combining telemetry, diverse data, regulations, and operational constraints, a twin preserves structural integrity while running rapid what-if scenarios. AI makes these systems dynamic and scalable, reducing inefficiency and strengthening security through real-time detection and resilience planning. I am fond of enterprise and business modeling, supply chain and logistics, and securing our critical infrastructure, particularly the energy sector, thus, many of our real world examples detail those. This book has four recurring themes:<br><br>* Human-Centered Culture, Strategy, and Business<br> AI must enhance&#8212;not replace&#8212;human capability. Innovation cultures, cross-sector literacy, and systems thinking allow humans to guide the systems they build.<br><br>* Engineering Reality: Architecture, Infrastructure, and Data Foundations<br> We show how AI integrates with OT, IT, energy systems, supply chains, and workflows. Knowledge graphs, hierarchical tagging, and multimodal data anchor trustworthy digital twins.<br><br>* AI Agents, Automation, and Execution<br> AI agents automate domain workflows while keeping humans in the loop. Modular architectures and clear governance ensure adaptability, accountability, and measurable value.<br><br>* Security, Safety, and Defensive Digital Twins<br> AI expands attack surfaces and IT and OT security gaps persist. Digital twins become defensive systems&#8212;continuously monitoring, simulating, and protecting critical infrastructure with engineering rigor.<br><br>The book has four parts, with 17 self-contained chapters that you can read in any order:<br>* Part 1: AI-Native Digital Twins<br> * Part 2: Infrastructure and Security Requirements<br> * Part 3: Engineering<br> * Part 4: Maintenance, Sustainment, and Business<br>The sections oscillate in and out of technical rigor and difficulty, so pick and choose according to your own needs and at your leisure.<br><br>Photo today: Military Order of the Caribao Wallow- for those who appreciate &#127482;&#127480;</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!4ElM!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F5a2e654b-bf6d-40e3-a50f-1fe1f207a6e0_512x512.heic" 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div>]]></content:encoded></item><item><title><![CDATA[AI Reshaped Authorship- I wrote a book before AI and a book after AI]]></title><description><![CDATA[From my new book- AI Powered Digital Twins (Wiley 2026)]]></description><link>https://halanelson.substack.com/p/ai-reshaped-authorship-i-wrote-a</link><guid isPermaLink="false">https://halanelson.substack.com/p/ai-reshaped-authorship-i-wrote-a</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Sat, 31 Jan 2026 21:07:52 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!OGGU!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1b999516-3cce-4a5a-8d87-44c57f6ca632_1296x730.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>AI Reshaped Authorship- I wrote a book before AI and a book after AI. Here's the difference:<br><br>How I Wrote This Book<br>AI has reshaped authorship and creativity so profoundly that working on this book often felt like collaborating with an equally capable peer. I brought my style, vision, ideas, logic, explanations, organization, models, structure, notes, musings, engineering design, authorship and pushback; AI helped research, organize, summarize, and iterate with me. It was fast. I could focus entirely on the substance&#8212;the experiences I&#8217;ve gathered across academia, industry, policy, and defense&#8212;rather than the tedious and messy cleanup. <br><br>With a thousand prompts or so, AI saved me months of work. It became my personal assistant and my own language calculator (down to the exact number of words when I needed). For perspective, I wrote my first book, Essential Math for AI (O&#8217;Reilly Media, 2023, 600 pages), without AI and it took a year and a half. This book took only seven months. I even built my own AI-powered YouTube summarizer app to help streamline parts of my workflow. I kept a full list of resources at the end of this book. AI is here to stay- because it works. Since I had to cut down the number of words substantially, my favorite prompt while writing became: &#8220;Rewrite the following in a few concise paragraphs, keep the same voice and tone.&#8221; <br><br>When I finished my second phase of edits (today ;)), I asked Gemini what&#8217;s ChatGPT&#8217;s context window, it said 128,000 words. I was happy, because I could plug my whole 87,850 word book and ask it to reduce it to 70,000 words, per my contract with my publisher. Then a third phase of edits&#8230; and off to freedom.<br><br>Video today: Despite my family's protests, hair color yellow again &#129760;<br><strong><a href="https://www.linkedin.com/search/results/all/?keywords=%23newbook&amp;origin=HASH_TAG_FROM_FEED">#newbook</a></strong> <strong><a href="https://www.linkedin.com/search/results/all/?keywords=%23authorship&amp;origin=HASH_TAG_FROM_FEED">#authorship</a></strong> <strong><a href="https://www.linkedin.com/search/results/all/?keywords=%23writingbooks&amp;origin=HASH_TAG_FROM_FEED">#writingbooks</a></strong> <strong><a href="https://www.linkedin.com/search/results/all/?keywords=%23newage&amp;origin=HASH_TAG_FROM_FEED">#newage</a></strong> <strong><a href="https://www.linkedin.com/search/results/all/?keywords=%23ai&amp;origin=HASH_TAG_FROM_FEED">#ai</a></strong></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" 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8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><div class="native-video-embed" data-component-name="VideoPlaceholder" data-attrs="{&quot;mediaUploadId&quot;:&quot;d01132bb-0431-4c23-a794-116bc757d602&quot;,&quot;duration&quot;:null}"></div>]]></content:encoded></item><item><title><![CDATA[Mathematical Modeling After Moore's Law]]></title><description><![CDATA[From my new book: AI Powered Digital Twins (soon- Wiley 2026)]]></description><link>https://halanelson.substack.com/p/mathematical-modeling-after-moores</link><guid isPermaLink="false">https://halanelson.substack.com/p/mathematical-modeling-after-moores</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Thu, 29 Jan 2026 18:26:39 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!0q-V!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fac4548ca-c7b9-4de7-8fb0-592c029629f3_1920x1920.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>For decades, Moore&#8217;s law provided mathematical modeling with a stable computational foundation: steady gains in transistor density, clock speed, and cost efficiency made it reasonable to assume that tomorrow&#8217;s hardware would simply run today&#8217;s models faster. Engineers could design algorithms largely independent of underlying hardware constraints, relying on linear performance improvements to absorb the complexity of badly designed algorithms. That assumption no longer holds. Modern computing is entering a regime defined less by raw speed and more by combinatorial structure, architectural diversity, and hard constraints on energy, memory, and parallelism.</p><p>In digital twins, this shift becomes concrete in several ways. Models increasingly require hardware-aware co-design, aligning algorithms with GPU parallelism, vectorized execution, and memory locality. Hybrid computational stacks combine physics-based solvers, optimization routines, and learned neural surrogates (usually neural networks that approximate the behavior of more expensive, physics-based or algorithmic models, but run much faster), each mapped to different hardware tiers.</p><p>Compute-aware modeling treats fidelity and resolution as adaptive choices rather than fixed parameters, while approximate inference replaces exact solutions with bounded, tractable approximations suitable for real-time operation. As a result, mathematical modeling is now inseparable from computational feasibility. Exhaustive computation was never truly practical; decades of hardware improvement merely postponed its consequences by masking poor algorithmic scaling. As gains from added compute diminish and architectural constraints dominate, digital twins must rely on representations that scale gracefully&#8212;preserving useful insight even when hardware can no longer compensate for computational inefficiency and poor design. The illusion of hardware improvements that Moore&#8217;s law provided for decades is now gone.</p><p>Come the era of quantum compute and model-system-compute co-design.</p><p><strong>#newbook</strong> <strong>#math</strong> <strong>#computation</strong> <strong>#digitaltwins</strong> <strong>#enterprisemodeling #mooreslaw</strong></p><p>Today&#8217;s Video: Summer and warmth must come back--H.</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!0q-V!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fac4548ca-c7b9-4de7-8fb0-592c029629f3_1920x1920.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!0q-V!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, 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data-attrs="{&quot;mediaUploadId&quot;:&quot;e9ccb9e2-2556-49bf-9f66-15bcac0acd87&quot;,&quot;duration&quot;:null}"></div>]]></content:encoded></item><item><title><![CDATA[AI-Powered Digital Twins of Fresh Water Systems]]></title><description><![CDATA[Fresh water systems are humanity&#8217;s most vital asset.]]></description><link>https://halanelson.substack.com/p/ai-powered-digital-twins-of-fresh</link><guid isPermaLink="false">https://halanelson.substack.com/p/ai-powered-digital-twins-of-fresh</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Sat, 02 Aug 2025 12:00:24 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!hzf0!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F7e730f6e-5979-435a-a699-e91ed7dcb151_1500x2000.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!hzf0!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F7e730f6e-5979-435a-a699-e91ed7dcb151_1500x2000.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!hzf0!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F7e730f6e-5979-435a-a699-e91ed7dcb151_1500x2000.heic 424w, /__u/substackcdn.com/image/fetch/$s_!hzf0!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, 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/__u/substackcdn.com/image/fetch/$s_!hzf0!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F7e730f6e-5979-435a-a699-e91ed7dcb151_1500x2000.heic 1456w" sizes="100vw" fetchpriority="high"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p>Fresh water systems are humanity&#8217;s most vital asset. As stress on these systems grows, AI-powered digital twins offer a valid solution providing real-time, data-driven insight for sustainable management. An AI-powered digital twin continuously integrates data from sensors, satellites, weather systems, usage logs, and public databases via APIs. This dynamic model reflects the current state of freshwater reserves and infrastructure, enabling accurate forecasting and rapid response. These twins blend traditional simulation models from operations research with AI models and agents that predict shortages, optimize allocations, and detect anomalies. Compliance rules are built in, ensuring water quality and usage align with regulations. Security measures, including encryption and threat detection, protect against tampering, while human oversight ensures responsible decision-making.<br>Most public data already enables highly accurate modeling of global water systems. When paired with localized consumption data&#8212;such as from data centers, agriculture, or municipalities&#8212;AI twins can recommend reallocation strategies and long-term preservation plans.<br>The strategic value is clear: if China offers hundreds of millions to acquire firms behind global AI-powered water twins, concerns over national security quickly follow. Control over freshwater intelligence is now a geopolitical asset.<br>AI-powered digital twins of fresh water systems offer visibility, resilience, and foresight. These are essential for securing the world&#8217;s most precious resource.<br><br>Photos today (Aug 2025): Jet lagged in Athens- Greece- 20 years and I still struggle with jet lag in this direction. It's brutal</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!zY5q!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 424w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 848w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!zY5q!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic" width="1326" height="946" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:946,&quot;width&quot;:1326,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:217632,&quot;alt&quot;:null,&quot;title&quot;:null,&quot;type&quot;:&quot;image/heic&quot;,&quot;href&quot;:null,&quot;belowTheFold&quot;:false,&quot;topImage&quot;:false,&quot;internalRedirect&quot;:&quot;https://halanelson.substack.com/i/169921804?img=https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic&quot;,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" srcset="/__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 424w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 848w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!zY5q!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F87e7df24-e70f-4963-8cdd-1650ba21499d_1326x946.heic 1456w" sizes="100vw"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p></p>]]></content:encoded></item><item><title><![CDATA[People Ask: What Are You Working on Nowadays?]]></title><description><![CDATA[Advancing AI, digital twins, and math all at the same time]]></description><link>https://halanelson.substack.com/p/people-ask-what-are-you-working-on</link><guid isPermaLink="false">https://halanelson.substack.com/p/people-ask-what-are-you-working-on</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Thu, 17 Oct 2024 21:25:41 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!OGv1!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>I am working on the following four. These are intimately related to each other:<br><br>1. Strategy to deploy AI into large complex organizations <br>2. Data governance in a large complex organization<br>3. Creating digital twins of large complex organizations: these include digital twins of operational assets and facilities, digital twins of organizational processes, and digital twins of decision making channels (includes decision makers- the reasoning humans)<br>4. Injecting secure and explainable AI into the above digital twins: this includes building and advancing the mathematics that underlies explainable AI, and implementing it at all levels of the data pipelines and digital twin design.<br><br>Why do all of this? </p><p>To drive efficiencies, to make automated and streamlined decision making trustworthy and explainable, to leverage multiple integrated technologies, to advance AI, math, and digital twins technologies all at the same time.<br><br>You want to help? Let me know ;) <br>Photo: Ann Arbor- MI. At a best friend&#8217;s wedding</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!OGv1!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 424w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 848w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!OGv1!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic" width="1456" height="1456" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:1456,&quot;width&quot;:1456,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:241798,&quot;alt&quot;:null,&quot;title&quot;:null,&quot;type&quot;:&quot;image/heic&quot;,&quot;href&quot;:null,&quot;belowTheFold&quot;:false,&quot;topImage&quot;:true,&quot;internalRedirect&quot;:null,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" srcset="/__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 424w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 848w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!OGv1!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8ff3c9ed-c688-430c-b548-0257381ed676_1920x1920.heic 1456w" sizes="100vw" fetchpriority="high"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p></p>]]></content:encoded></item><item><title><![CDATA[How Do You Make Money from Your Book?]]></title><description><![CDATA[If You Are Thinking about Writing a Book]]></description><link>https://halanelson.substack.com/p/how-do-you-make-money-from-your-book</link><guid isPermaLink="false">https://halanelson.substack.com/p/how-do-you-make-money-from-your-book</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Tue, 23 Jul 2024 19:25:57 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!V-pN!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>The question that many people who meet me end up either dancing around or implicitly asking: how do you make money from your book?<br><br>I am an educator at heart so I will spill some beans&#8230;<br><br>* <strong>My salary from my full-time job</strong>: no one transitions to a full-time writer who roams the world in one shot. Some important stuff usually happens before that. <br><br>* <strong>Book royalties</strong>: every month- being the only author equals no royalty sharing.<br> <br>* <strong>Marketing</strong>: more marketing equals more book sales. These add up. Digital marketing takes the biggest chunk of marketing time, and I set aside special time for it. I have not paid for any marketing media yet (unless you want to watch me Lebanese dance on stage with some famous Lebanese dance groups ;)). I did toy around with the paying for marketing idea. I welcome your comments. <br><br>* <strong>Speaking engagements</strong>: I come from academia, and after an ungodly amount of free labor while career-building, we start getting paid to speak. After writing a book on a hot topic right before it blows up, the payments increase, but the exact amount varies depending on the event type, venue, audience, and even the country. Ironically, developing countries pay more than developed countries. <br><br>* <strong>Short in person courses and online courses</strong>: on the subject that you are mostly famous for. Again the payments vary.<br><br>*<strong> Consulting and coaching</strong>: the secret here is to truly understand the issue at hand BEFORE offering any solutions. <br><br>* <strong>This one is usually overlooked</strong>: opportunities and access- writing books that people want to read opens doors, communities, and letter-suites, that you never knew existed&#8230;<br><br>Hope this helps&#8230; Now the biggest mistake that I did right after publishing my first book was... stay tuned&#8230;</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!V-pN!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 424w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 848w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!V-pN!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic" width="1456" height="1941" 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/__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 424w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 848w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!V-pN!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F1a4738c7-3188-4397-8f74-21afed9897b3_3024x4032.heic 1456w" sizes="100vw" fetchpriority="high"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p></p>]]></content:encoded></item><item><title><![CDATA[Advanced Technologies and AI Strategy ]]></title><description><![CDATA[You Are Not Missing Out]]></description><link>https://halanelson.substack.com/p/advanced-technologies-and-ai-strategy</link><guid isPermaLink="false">https://halanelson.substack.com/p/advanced-technologies-and-ai-strategy</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Tue, 23 Jul 2024 19:09:51 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!UW6Q!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>Many technologies, including AI, exist in their current shape because of past investments in Fundamental Research and/or Intelligence Communities (IC). Then Big Tech is usually able to scale the new technologies for consumer applications. Then all sorts of organizations and enterprises join in, adding components (including people, positions, offices, assets) and layers to so that the new technology integrates into existing (or brand new) infrastructures, operations, and processes. Finally the technology fades into the background of everyday life, like electricity, the internet, smart phones, and countless others.<br><br>If your organization is embarking on an adoption journey with AI, you need human champions and a strategy. Details of a strategy to integrate AI into the systems supporting your organization can vary between different organizations, but there are also constants: <br>- improve data quality<br>- document your complex processes<br>- ensure solid data and AI governance<br>- identify the use cases- prioritize and perform a cost benefit analysis.<br>- choose the AI technology (off the shelf, customize, or build from scratch)<br>- experiment within limited groups, collect feedback, and improve<br>- set and monitor processes for Accuracy, Security, Safety, Speed, and Scale<br>- ensure regulatory compliance and responsible use<br>- deploy wider, collect feedback, and iterate<br>- up-skill your organization&#8217;s citizens and promote a culture shift towards an enhanced data and AI literacy<br>- democratize access to AI, with training campaigns, feedback cycles, and good user experiences <br></p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!UW6Q!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!UW6Q!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic 424w, /__u/substackcdn.com/image/fetch/$s_!UW6Q!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic 848w, /__u/substackcdn.com/image/fetch/$s_!UW6Q!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!UW6Q!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic 1456w" sizes="100vw"><img src="/__u/substackcdn.com/image/fetch/$s_!UW6Q!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic" width="1456" height="1553" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/25d2e68a-8994-4231-a3c0-e9667b584fd0_1500x1600.heic&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:1553,&quot;width&quot;:1456,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:349441,&quot;alt&quot;:null,&quot;title&quot;:null,&quot;type&quot;:&quot;image/heic&quot;,&quot;href&quot;:null,&quot;belowTheFold&quot;:false,&quot;topImage&quot;:true,&quot;internalRedirect&quot;:null,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" srcset="/__u/substackcdn.com/image/fetch/$s_!UW6Q!, /__u/halanelson.substack.com/w_424, 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xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p></p>]]></content:encoded></item><item><title><![CDATA[My Wiggly Jiggly Path to Published Author and Full Professor]]></title><description><![CDATA[A Small Glimpse of a Full Life]]></description><link>https://halanelson.substack.com/p/my-wiggly-jiggly-path-to-published</link><guid isPermaLink="false">https://halanelson.substack.com/p/my-wiggly-jiggly-path-to-published</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Fri, 03 May 2024 20:28:29 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!6-VE!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>This actually happened&#8230;</p><ul><li><p>I had a massive culture shock when I first moved to New York City (NYC) to pursue my PhD at New York University (NYU).</p></li><li><p>I was extremely mathematically underprepared and found myself in one of the most prestigious schools in the country among the smartest students in the world. I wanted to live in New York City, so I applied to NYU. I had no idea at the time what being at the Courant Institute of Mathematical Sciences really meant.</p></li><li><p>I had left a war and two engagements to fianc&#233;s I did not know in Lebanon, and I had a heavy religious baggage to shed, alongside an incredibly demanding PhD program.</p></li><li><p>I got married during my third year of graduate school, defended my thesis at my fifth year, while pregnant.</p></li><li><p>I moved with my then husband to Michigan, where both of us were offered postdoc positions at The University of Michigan - Ann Arbor.</p></li><li><p>I had my daughter in Michigan, got divorced, my ex-husband went to live in Mexico, and I became a single mother for a very young child. I did not have family in Michigan, a permanent residency in the States, or a permanent job.</p></li><li><p>I applied for very few tenure track positions at liberal arts schools, and I got a tenure track position at James Madison University (JMU). I moved to Virginia with my daughter when she was three.</p></li><li><p>Right when I moved to Virginia a person very close to me died. Grieving their death while starting a new job in a new state with a small child was the most difficult thing I had gone through in my entire life.</p></li><li><p>I went up early for tenure, and I got tenured, seven years after earning my PhD, four years after getting hired at JMU. I am now a full professor, a published author, working on the most stimulating projects in AI, data (all engineering, computation, applied math, business acumen, and building people relations, in my mind).</p></li></ul><p>So how did it happen?</p><ul><li><p>I never listened to all the &#8220;no&#8217;s&#8221; I was told. No one knew my circumstances and what I was battling while being at my job. I was confident of what I was capable of, <em>only when I got time to focus on it</em>. I was very O.K. with not having time to focus on my job, I did not feel guilty. <strong>I had this deep confidence that I was playing the hand I was dealt in the best possible way</strong>. I did not try to compete or compare myself to other people at the same level of my career.</p></li><li><p>I was put down more times than you can ever imagine, both personally and professionally: &#8220;You do not have the skills to pursue a job outside academia,&#8221; when I was contemplating leaving academia. &#8220;We want a professional to do this,&#8221; when I proposed doing a new project. And these were the nice put downs&#8230;</p></li><li><p>I enjoyed my life a lot and valued what I had and what I had accomplished. I was living my dream, my most powerful persisting dream, the one I had since I was a little girl: <strong>to be free</strong>. I was free. No one knew what I had gone through to get to be free. So as amazing and attractive being a professor in math is, it&#8217;s nothing compared to finally living and being free, day in and day out.</p></li><li><p>I kept on working on research projects even though I knew I did not have the time to finish or publish them. There is a seven year break from publishing on my resume. <strong>I could not afford to worry about that</strong>. </p></li><li><p>I never subscribed to the <em>publish or perish</em> bad incentive machine in academia. I had my own version- <strong>publish nothing or something worthwhile</strong>. I also had my own comfortable timeline because why would we perish if we still have a brain and valuable training? Isn&#8217;t that a waste? Just because something is a long held principle doesn't mean it is true, or that it applies to all situations and times. Perhaps it is just old school.   </p></li><li><p>I got a job that valued my teaching, service, and was forgiving, at least for a bit, about my publishing break. When I was finally able to publish my projects, I went up for tenure and my application was successful.</p></li><li><p>I applied for many small grants. When some got rejected I wrote to the grant directors and asked for feedback. I implemented their recommendations in my next proposals. I applied again. By the time I went up for tenure I had been able to secure over $90,000 in funding for various research and service projects. By the time I became a full professor, I had secured ~$365,000, which is a lot for a math professor in an R3 to R2 school. Note I had applied for more than $1million, so ~$700,000 grant applications were rejected, and that did not faze me to apply to other grants.</p></li><li><p>I rarely was able to focus my brain on math in my pre-tenure years, not because I did not want to, but because raising my daughter and providing her with the best kind of security- emotional, financial, housing, and educational- were my priority. I homeschooled her too. I knew that I would get back to my job full force, however these formative years for her were never going to come back, and no career can substitute giving her a solid foundation in life. It&#8217;s also a fact that no child under the age of eight gives a single parent any free time, so it&#8217;s not like I had much of a choice.</p></li><li><p>I documented everything I did in my career, as related to: teaching, research, service, grants, and mentoring students. This documentation came very handy when writing my promotion applications.</p></li><li><p>I cared tremendously about my students&#8217; success.</p></li><li><p>I ran an Airbnb, but that is a different story.</p></li><li><p>I felt grateful that I had a beautiful home, a beautiful daughter, amazing friends, a great sister who was incredible support via phone from Lebanon, a paycheck, and an adventurous life full of travels. I always felt that if being a math professor did not work out, it did not matter, since with what I have been able to overcome since I was so little has somehow prepared me to be anything I want to be- when I want it.</p></li></ul><p>When you are born and raised in a war, when you experience various losses and hardships: forced engagements, culture shocks, graduate school, new beginnings over and over, changing countries, jobs and states, death, heartbreak, motherhood, single motherhood, and many other life events; getting tenure, or not getting tenure, promotion, or no promotion, acceptance, or rejection, becomes the least of your worries, because you deeply believe that your heart is strong, loving, and will survive.</p><p>I am now at a different place in my life and career, and I love it all. I am also more experienced and productive. I love my family, travels, books, projects, research, students, and service. My daughter is 13. My husband is awesome &#10084;&#65039;. I travel, take pictures, and write.</p><p><strong>Photos:</strong> Birthday at Navy Yard in DC- Albi Restaurant- Michelin Star- Highly Recommend</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!6-VE!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!6-VE!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic 424w, /__u/substackcdn.com/image/fetch/$s_!6-VE!, 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/__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic 424w, /__u/substackcdn.com/image/fetch/$s_!6-VE!, /__u/halanelson.substack.com/w_848, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic 848w, /__u/substackcdn.com/image/fetch/$s_!6-VE!, /__u/halanelson.substack.com/w_1272, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic 1272w, /__u/substackcdn.com/image/fetch/$s_!6-VE!, /__u/halanelson.substack.com/w_1456, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_auto, /__u/halanelson.substack.com/q_auto:good, /__u/halanelson.substack.com/fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fffcdc744-ef3a-446a-a815-b9c51fc0707d.heic 1456w" sizes="100vw" fetchpriority="high"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg aria-hidden="true" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a></figure></div><p></p>]]></content:encoded></item><item><title><![CDATA[The Self-Assigned Gatekeepers of Knowledge]]></title><description><![CDATA[They used to rule in the old days, not anymore, and that is a good thing..]]></description><link>https://halanelson.substack.com/p/the-self-assigned-gatekeepers-of</link><guid isPermaLink="false">https://halanelson.substack.com/p/the-self-assigned-gatekeepers-of</guid><dc:creator><![CDATA[Hala Nelson]]></dc:creator><pubDate>Mon, 04 Mar 2024 22:34:42 GMT</pubDate><enclosure url="https://substackcdn.com/image/fetch/$s_!HkOS!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F71a7ec18-97df-43cd-80a8-bf7ec6cd1357.heic" length="0" type="image/jpeg"/><content:encoded><![CDATA[<p>I am the mathematician who tells you, unconventionally: <strong>be guided, but do not be blinded, by mathematical models.</strong> The old gatekeepers of knowledge, the ones who taught me and you, and those who taught them, simplified the world to the level of absurdity, created models that relied on toy assumptions about nature, humans, social behavior, economics, financial markets- you name it- then ran with their models. They built entire fields based on their models, on models of these models, at each step deviating farther from any usefulness or semblance of real life, let alone predictive ability. </p><p>They used the word <em>mathematics</em>, with its fancy formulas and plentiful theorems, both as guard to keep curious people away, and as a weapon to attack anyone who questions the assumptions underlying their models and the limitations to their predictive capabilities. Quantifying uncertainty, risk, and others, became a business that no one understands except the gatekeepers of knowledge, and whoever they accepted to their club, where the rules are: do not question the usefulness or faithfulness of these models to empirical reality. The same reality where markets crash, wars happen or do not end, and the gatekeepers create all kinds of awards to congratulate themselves- and win them. They create grants and award them to each other. The call for new ideas never ends, with incentivizing vocabulary like: revolutionary, transformative, disruptive,&#8230; but do they really want new ideas when that means relearning their entire fields, upending the whole foundation of their expert-less industries? Are they willing to at least communicate with honesty about the limitations of their trade? That most times, we do not know the rules of the game, and that made-up rules are just <em>made-up?</em>  </p><p>I love math more than anything, and I believe that our universe was written in its language. Math is out there; we just happen to have the hardware and software to discover it. But nature didn&#8217;t reveal its own governing equations to us, or its underlying probability distributions from which all human behavior in all kinds of situations can be predicted. All that we can do is approximate, then hope that our approximations are not too far off.  </p><p><strong>My unconventional advise to you is be willing to unlearn</strong>, but if you are in too deep, then identify which bubble you are currently operating from: are you in a theoretical bubble, too far removed from empirical evidence? Are you purely experimental? Are you on the ground? Are you an executive? A strategist? An engineer? Are you looking for applications and use-cases for your work? Who are you? Now look at what people in other bubbles in your field are doing, and let the intersection of all, only if it remains appealing, guide the next thing to learn or do. </p><p>In the digital age with algorithmic networks and graphs ruling supreme, the world of old gatekeepers has changed. We now have the big markets of ideas and the big markets of data. Acquiring information, disseminating information, distilling experience into valuable knowledge, and building platforms follow different rules. <em>And this is all good.</em></p><p>#connectivity #digitalage #transformation #gatekeeping #math #modeling #prediction #ai #data   </p><p><strong>Photo.</strong> At a beach on the Atlantic&#8212; will not locate because I love so many beaches in the world much more.</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="/__u/substackcdn.com/image/fetch/$s_!HkOS!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F71a7ec18-97df-43cd-80a8-bf7ec6cd1357.heic" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="/__u/substackcdn.com/image/fetch/$s_!HkOS!, /__u/halanelson.substack.com/w_424, /__u/halanelson.substack.com/c_limit, /__u/halanelson.substack.com/f_webp, 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