SudokuVariants is an online platform where users can play and create various Sudoku variants. The site boasts a wide selection of Sudoku types, including Killer Sudoku, Arrow Sudoku, and Thermo Sudoku, allowing users to filter and select puzzles based on preference. Furthermore, it supports saving and importing Sudoku grids for convenient gameplay.
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Amidst the constant distractions of modern technology, Calm Tech certification emerges as a solution. Founded by Amber Case, the Calm Tech Institute has established 81 standards across six categories—attention, periphery, durability, light, sound, and materials—to reward products designed for focus and minimal distraction. Initial certified devices include the reMarkable Paper Pro and the Mui Board Gen 2, both prioritizing minimalist design and reduced notifications. The Calm Tech Institute plans further research and collaboration with neuroscientists to better understand cognitive needs in UI design.
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This article delves into the mathematical enigma of 'Cab numbers,' which are numbers formed by the product of two factors whose digits, excluding zero, combine to form the same digits as the product. The article presents methods for solving Cab numbers with 3 to 9 digits, providing the count, minimum, and maximum values for each digit range. The author utilizes a Fortran program to compute these Cab numbers, analyzing the properties of their digital roots. The article concludes by listing some results and extending the exploration to scenarios involving three or more factors.
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Scale AI CEO Alexandr Wang took out a full-page ad in The Washington Post urging President Trump to prioritize the AI race. He argues the US needs increased AI investment, shifting focus from algorithms to compute power and data. Wang also recommends streamlining new energy production and leveraging government data for AI development. He believes AI will create jobs, but the US needs to support workers adapting to new roles.
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Foqos is a focus app leveraging NFC technology to help users stay on task. Create multiple profiles for different scenarios (work, study, bedtime, etc.). Write these profiles to NFC tags for instant activation with a single tap – no unlocking or app opening required. Foqos is free, private, and open-source forever. No subscriptions, tracking, or data collection. Just pure focus.
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EFishery, a prominent Indonesian agritech startup, is under investigation for allegedly inflating its revenue and profit figures over several years. An internal probe estimates that management falsely reported nearly $600 million in revenue in the nine months to September 2024, representing over 75% of reported figures. Backed by SoftBank and Temasek, EFishery achieved a $1.4 billion valuation. This alleged fraud raises serious concerns about corporate governance and casts a shadow on Indonesia's startup scene.
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The author used LLMs for coding assistance, initially with a ContinueDev + OpenRouter setup. Costs unexpectedly soared. Investigation revealed that Jupyter Notebook (.ipynb) files contain significant hidden content (code outputs, metadata, base64-encoded images), leading to a large token count and increased LLM call costs. The solution was converting .ipynb files to .py files and removing base64-encoded images. This reduced costs by 94% and latency as well. The post highlights the importance of mindful input when using LLMs and recommends regularly checking costs.
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Gartner's latest report warns that migrating from VMware to alternative virtualization platforms will be a long, expensive, and risky undertaking. For organizations running 2,000+ VMs, migrations could take 18-48 months, with per-VM costs ranging from $300 to $3,000. The report highlights the complexity stemming from VMware's deep integration beyond just virtualization, encompassing networking, storage, and management tools. Many VMware users haven't started migration planning; Gartner advises starting early to avoid potential Broadcom price increases. Alternatives exist from vendors like Red Hat and Oracle, but migration still demands extensive planning and testing.
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Last summer, the author released Raven, an independent implementation of the Uxn CPU and Varavara orchestrator. Recently, to improve stability and performance, the author built a robust testing infrastructure, including GitHub Actions CI, snapshot testing, static panic prevention, and fuzzing. This post details challenges and solutions encountered while building these tests, such as issues with the reliability of GitHub Actions' Windows and ARM runners, and pitfalls in statically proving the absence of panics and in fuzz testing. The author successfully improved Raven's performance and reliability, ensuring cross-platform portability. The journey highlights the power of Rust, cargo-fuzz, and even (sigh) GitHub Actions in creating robust and correct systems.
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A software developer raises concerns about using AI and Large Language Models (LLMs) for Christian apologetics. He argues that LLMs are fundamentally "bullshit generators," capable of producing truthful outputs but not designed to prioritize truth, making them prone to fabricating information. Using LLMs in apologetics risks spreading falsehoods and damaging Christianity's credibility. The author suggests focusing on creating powerful search engines to improve access to existing resources instead of relying on LLMs.
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Mathematicians are fascinated by the pursuit of special prime numbers, such as palindromic primes and Smarandache primes. The article recounts anecdotes about prime numbers and the quest for 'memorable primes,' like 12345678910987654321. Indian engineer Shyam Sunder Gupta discovered a massive palindromic prime with 17,350 digits, sparking a wider hunt. While these primes don't offer immediate mathematical applications, their unique properties and the search itself are captivating, attracting numerous math enthusiasts.
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Pica is an ambitious open-source project aiming to build a fully autonomous AI system. Unlike existing AI models trained for specific tasks, Pica strives for general-purpose AI capable of learning and adapting to various tasks. Its modular design allows researchers and developers to contribute and improve its components. Pica's success could revolutionize AI, potentially leading to more powerful, flexible, and general AI systems, unlocking new possibilities across diverse applications while also presenting new challenges and ethical considerations.
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This article details an experiment to determine the maximum number of Alpine Linux packages installable simultaneously. The author parsed Alpine's APKINDEX files, extracting package dependencies, conflicts, and provides relationships. These were translated into constraints for a PuLP solver. The experiment successfully installed 98.5% of packages from the main repository and 97.8% from main + community. This showcases algorithmic optimization of package installation, offering insights into building leaner container images.
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A 15-year-old high school student, Daniel, discovered a critical zero-click deanonymization attack exploiting Cloudflare's caching mechanism. This vulnerability allows attackers to pinpoint the location of users within a 250-mile radius by sending a malicious payload to vulnerable applications like Signal, Discord, and hundreds of others. The attack requires no user interaction and can even be achieved via push notifications. Daniel developed a tool, Cloudflare Teleport, to demonstrate the exploit. While he responsibly disclosed the vulnerability, responses from affected companies were largely unsatisfactory. This highlights the potential security risks inherent in CDN caching and underscores the importance of user privacy awareness.
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Brendan Carr's ascension to FCC chair signals significant regulatory changes for the tech and media industries. His involvement in Project 2025, proposing limitations on Section 230 immunity for tech companies and content prioritization disclosures, foreshadows a stricter regulatory environment. He also plans to leverage the FCC's power to revoke spectrum licenses for networks violating the equal time rule. However, Trump's shift on TikTok complicates Carr's approach to national security threats posed by the app. His success hinges on securing support from other Republican commissioners.
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This post explores the competition between vertical AI applications (AI optimized for specific domains) and horizontal AI applications (more general-purpose, scalable AI). Using personal experience and Hamilton Helmer's Seven Powers framework, the author argues that as model performance improves, vertical AI applications struggle to maintain a competitive edge. Except for a rare few possessing exclusive and essential resources, most vertical AI applications will eventually be overtaken by superior horizontal AI. Horizontal AI, akin to a remote coworker, is easily integrated, cheaper, and continuously improves performance through model advancements. The author uses their AcademicGPT project as a case study, showing how a vertical AI application was surpassed by more general horizontal AI models.
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China set a new record for renewable energy installations in 2024, adding approximately 277 gigawatts of solar and nearly 80 gigawatts of wind power. This achievement marks a significant milestone, allowing China to reach its 2030 renewable energy target six years ahead of schedule, contrasting sharply with the US's shift towards fossil fuels. Despite a challenging year for the solar industry due to oversupply, the installation pace remained impressive. While challenges like grid infrastructure upgrades and land availability may slow growth in the coming years, substantial additions are still projected for 2025.
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Amurex is an open-source project aiming to simplify the deployment of large language models (LLMs). It provides an easy-to-use framework, enabling developers to integrate powerful LLMs into their applications with ease, without needing deep knowledge of complex underlying technologies. Find the project here: https://github.com/thepersonalaicompany/amurex. This project lowers the barrier to entry for AI applications, accelerating the adoption of AI technology.
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Printercow transforms any thermal printer into an API endpoint, letting you print anything from receipts to AI-generated art via HTTP requests. Support for various thermal printer brands is included, along with 300 free prints per month. Simple installation via command line or desktop app makes setup a breeze. Whether you're a hobbyist printing AI poems or a business handling thousands of receipts daily, Printercow scales to your needs. Its flexible settings, robust features, and privacy-focused design make it the perfect bridge between AI and the physical world.
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The murder of United Healthcare CEO Brian Thompson by Luigi Mangione has captivated the public, leaving many to question his motives. This article draws parallels between the case and Henry James' lesser-known novel, "The Princess Casamassima," which features a charismatic young revolutionary grappling with conflicting desires for luxury and violence. Both the real-life event and the fictional narrative leave crucial details shrouded in mystery, fueling speculation about the psychology behind political violence and highlighting the limitations of realism in depicting such acts.
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GPS pioneer Garmin faced near-extinction from Apple and Google's rise. However, massive R&D investment allowed a dramatic pivot, transforming the company from a car navigation device firm into a leader in fitness watches and trackers. The article details Garmin's journey, from the invention of GPS and Garmin's founding to its transition from car navigation to the outdoor and fitness tracking market. Its sustained R&D spending enabled survival and growth in a fiercely competitive landscape, showcasing the importance of continuous innovation and adaptation.
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This post summarizes lessons learned from building applications using Large Language Models (LLMs). LLMs excel at transforming large amounts of text into concise summaries; they struggle with generating more text than input or relying on their pre-trained data for complex reasoning. Effective LLM applications should provide the LLM with all necessary information, letting the LLM perform text condensation. The author advises against using LLMs for tasks requiring human expertise (e.g., medical diagnosis) and emphasizes that LLMs should augment, not replace, human workers. Avoid using LLMs for tasks that can be done with regular code.
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This post details the debugging journey of a seemingly minor bug in the Apache NuttX RTOS's `uname` command. The initial problem: the commit hash was missing from the output. The investigation led down a rabbit hole, involving inspecting the kernel image, calling `uname` at kernel startup, and disassembling the application. The culprit? A broken static variable (`g_version`) responsible for storing the commit hash within NuttX applications. This unexpected behavior highlighted the importance of thorough debugging in embedded systems, emphasizing that even minor anomalies can signal deeper, more serious issues.
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Dokploy is an open-source, user-friendly platform streamlining multi-server application deployments and management. Supporting Nixpacks, Heroku Buildpacks, and custom Dockerfiles, it natively integrates with Docker Compose. Features include advanced user management, database management with backups, API & CLI access, and Docker Swarm cluster support. Real-time monitoring, alerts, numerous open-source templates, and a vibrant community further enhance its capabilities. Whether deploying small projects or large-scale applications, Dokploy provides a flexible and efficient solution.
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A recent Hacker News post highlights a shift in startup sentiment. While in 2013, failed founders received supportive comments, now similar stories are met with skepticism about the risks. This change is attributed to: the increased visibility of negative consequences (burnout, relationship issues, mental health struggles); high salaries at Big Tech making the financial incentive for startups less appealing; limitations of the VC model becoming clear; and the low-hanging fruit of the mobile/web era being largely picked. The author suggests this signals a 'Startup Winter,' potentially leading to a more authentic and sustainable startup ecosystem.
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Poland, a key US ally, is furious over US restrictions on the export of AI chips. This move threatens Poland's ambitious military expansion and technological development. The Polish government considers the decision incomprehensible and is seeking redress from both the US and the EU to protect its technological and defense interests.
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New research suggests Mars' iconic dichotomy boundary, separating the higher southern hemisphere from the lower northern one, may have receded hundreds of kilometers due to water erosion. Researchers analyzed data from the Mars Express and Mars Reconnaissance Orbiter, finding that thousands of buttes and mesas near Mawrth Vallis, situated at the dichotomy boundary, share a similar height with a nearby higher-elevation plateau, indicating they are remnants of a larger plateau eroded away. This massive erosion suggests an active water cycle early in Mars' history, consistent with the theory of a northern ocean but also potentially caused by other hydrological processes like ice cap melting. The finding offers new clues about early Martian climate and geological evolution, adding to evidence for a past ocean but also raising new questions.
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A groundbreaking study using ancient DNA has revealed a surprising social structure in an Iron Age Celtic tribe in Britain. Unlike previous prehistoric societies, the Durotriges tribe, dating from 100 BCE to 100 CE, was centered around women. Analysis of mitochondrial DNA showed matrilocal residence, with men moving to their wives' communities. This provided women with strong support networks and significant influence, challenging traditional gender roles and offering a new perspective on ancient social organization. The findings suggest a widespread matrilocal custom across Britain during the Iron Age.
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FOSDEM 2025 organizers issued a statement addressing planned protests against a controversial talk. The statement clarifies that the talk's inclusion wasn't influenced by sponsorship; claims suggesting otherwise are false. FOSDEM has always welcomed peaceful protests, provided they don't disrupt proceedings. Organizers urge protest organizers to contact them beforehand to ensure safety and fire regulations are met.
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Both Redis' UNLINK and DEL commands remove keys, but their internal implementations differ. DEL synchronously deletes keys and frees memory, while UNLINK asynchronously queues the deletion for background processing. UNLINK's 'non-blocking' nature isn't absolute; it calculates the cost of deleting an object: if the cost is less than 64, it deletes synchronously; otherwise, asynchronously. The article delves into the Redis source code, explaining the implementation details of UNLINK and DEL, including key slot calculation, two-phase unlinking, and asynchronous deletion, and discusses the role of LAZYFREE_THRESHOLD.
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