https://pankajksingh.com/ Musings on paths new and staid — technology, physics, and Hindi poetry. en https://pankajksingh.com/physics/which-way-does-a-mirror-flip/ https://pankajksingh.com/physics/which-way-does-a-mirror-flip/ Tue, 15 Sep 2026 00:00:00 GMT Physics Stand in front of a mirror and your left hand becomes the right. But your head doesn't become your feet. Why does a mirror reverse left and right, but not up and down? https://pankajksingh.com/poetry/beech-mein-hain-babaji/ https://pankajksingh.com/poetry/beech-mein-hain-babaji/ Mon, 14 Sep 2026 00:00:00 GMT कविताएँ A childhood memory, a carpenter’s imperfect chair, and four earthy lines that became family folklore. https://pankajksingh.com/ml/generative-ai/ https://pankajksingh.com/ml/generative-ai/ Sun, 29 Dec 2024 00:00:00 GMT Machine Learning A history of the ideas behind today's generative AI, told through a decade of notebooks — from a best-fit line to the Transformer. https://pankajksingh.com/systems/caching-containers/ https://pankajksingh.com/systems/caching-containers/ Sat, 30 Dec 2023 00:00:00 GMT Systems Containers look like ordinary key-value cache entries — until you notice that serving one consumes it. That single difference turns caching into inventory management. https://pankajksingh.com/ml/fraud-detection-in-cloud/ https://pankajksingh.com/ml/fraud-detection-in-cloud/ Thu, 15 Jun 2023 00:00:00 GMT Machine Learning How cloud providers spot payments and account fraud with velocity analysis — and the precision/recall trade-offs that decide whether customers trust the system. https://pankajksingh.com/systems/touch-production-with-care/ https://pankajksingh.com/systems/touch-production-with-care/ Thu, 29 Dec 2022 00:00:00 GMT Systems Production access is necessary but risky. A way to score the riskiness of every "touch" — using embeddings and clustering — so owners can act on the riskiest first. https://pankajksingh.com/ml/support-fast-and-relevant/ https://pankajksingh.com/ml/support-fast-and-relevant/ Tue, 29 Dec 2020 00:00:00 GMT Machine Learning A slice of support cases is really a translation problem — complaint to search query. Using support and search logs as a pivot, we can learn that mapping and resolve faster. https://pankajksingh.com/systems/detecting-software-regressions/ https://pankajksingh.com/systems/detecting-software-regressions/ Fri, 28 Dec 2018 00:00:00 GMT Systems When a fast-moving cloud regresses, which component is the culprit? A detective's approach — spatio-temporal correlation between upgrades and health — built into a tool called Gandalf. https://pankajksingh.com/poetry/aaj-phir-dadhichi-chahiye/ https://pankajksingh.com/poetry/aaj-phir-dadhichi-chahiye/ Sun, 06 Dec 1992 00:00:00 GMT कविताएँ Lines written by a young Pankaj in the aftermath of the Ayodhya events of 1992, rediscovered through a sister’s memory.