<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>Duk Lee | Learn</title><description>Curated notes, deep dives, and mental models on topics I am curious about — systems architecture, physical computation, biology, economics, and human behavior.</description><link>https://learn.duklee.net/</link><language>en-us</language><item><title>Tools and Their Uses: An Epistemology of Mechanical &amp; Precision Instruments</title><link>https://learn.duklee.net/blog/2026-10-09-tools-and-their-uses-complete-field-handbook/</link><guid isPermaLink="true">https://learn.duklee.net/blog/2026-10-09-tools-and-their-uses-complete-field-handbook/</guid><description>A deep dive into NAVEDTRA 14256 / TM 9-243 — covering 53 chapters and 150+ hand, measuring, and power tools as extensions of human perception and physical work.</description><pubDate>Fri, 09 Oct 2026 00:00:00 GMT</pubDate></item><item><title>Landauer&apos;s Principle: Why Information Erasure Dissipates Heat</title><link>https://learn.duklee.net/blog/2026-10-08-landauer-principle-thermodynamics-of-information/</link><guid isPermaLink="true">https://learn.duklee.net/blog/2026-10-08-landauer-principle-thermodynamics-of-information/</guid><description>Exploring the thermodynamic threshold of computing — how erasing one bit of logical state irreversibly generates heat into the environment.</description><pubDate>Thu, 08 Oct 2026 00:00:00 GMT</pubDate></item><item><title>Ashby&apos;s Law of Requisite Variety in Autonomous Systems</title><link>https://learn.duklee.net/blog/2026-10-07-ashbys-law-and-agent-control-systems/</link><guid isPermaLink="true">https://learn.duklee.net/blog/2026-10-07-ashbys-law-and-agent-control-systems/</guid><description>Why brittle software pipelines fail against real-world entropy, and why autonomous controllers must match the variety of their environment.</description><pubDate>Wed, 07 Oct 2026 00:00:00 GMT</pubDate></item><item><title>The Cell as an Error-Correcting State Machine: Lessons from DNA Repair</title><link>https://learn.duklee.net/blog/2026-10-06-cellular-information-dna-error-correction/</link><guid isPermaLink="true">https://learn.duklee.net/blog/2026-10-06-cellular-information-dna-error-correction/</guid><description>How biological evolution solved distributed consensus and Byzantine fault tolerance millions of years before computer science.</description><pubDate>Tue, 06 Oct 2026 00:00:00 GMT</pubDate></item><item><title>The Extended Mind Thesis: Why Notes Are Not Just Records, But Thinking Itself</title><link>https://learn.duklee.net/blog/2026-10-05-extended-mind-and-tools-for-thought/</link><guid isPermaLink="true">https://learn.duklee.net/blog/2026-10-05-extended-mind-and-tools-for-thought/</guid><description>Why your notebook, compiler, and scratchpad are not external hard drives, but active, physical components of your cognitive engine.</description><pubDate>Mon, 05 Oct 2026 00:00:00 GMT</pubDate></item></channel></rss>