A Penn State student has refined a century-old math theorem known as the Kutta-Joukowski theorem, which calculates the lift generated by an airfoil. This refined theorem now accounts for rotational and unsteady forces acting on airfoils in turbulent conditions, something the original theorem didn't address. This advancement is significant for the wind energy industry, as it allows for more accurate predictions of wind turbine blade performance in real-world, turbulent wind conditions, potentially leading to improved efficiency and design of future turbines.
Corporate.watch is a simple website that humorously reimagines the current time using corporate jargon. Instead of traditional numerical time, it displays phrases like "End of Q1 Business Alignment Sync" or "Ideation Brainstorm Touchpoint" to represent different times of day, satirizing the often-opaque language used in corporate settings. The site offers a quick, amusing way to check the time while poking fun at corporate culture.
Hacker News users generally found the "corporate time" website humorous and relatable, appreciating the satire of corporate jargon. Several commenters shared their own experiences with similar time-wasting practices in corporate environments, including pointless meetings and obfuscated communication. Some found the specific examples on the site, like "circling back" and "bandwidth," particularly resonant. While some debated the effectiveness of the humor, the prevailing sentiment was amusement and recognition of the absurdities of corporate culture. A few commenters suggested improvements to the site, such as adding more phrases or making it interactive.
Micro Journal is a minimalist, distraction-free writing tool designed for quick journaling and note-taking. It prioritizes simplicity and privacy by storing entries locally in plain text files, eliminating the need for accounts, cloud syncing, or databases. The interface is deliberately barebones, offering only essential features like creating, saving, and searching entries. This focus on core functionality aims to encourage regular writing by reducing friction and ensuring quick access to past thoughts and ideas.
Hacker News users generally praised the Micro Journal for its minimalist design and focus on distraction-free writing. Several commenters appreciated its open-source nature and the use of readily available components, making it easy to replicate or modify. Some discussed the potential benefits of e-ink for focused writing and its lower power consumption. A few expressed concerns about the limited functionality compared to more feature-rich options, while others suggested potential improvements like a larger screen or different keyboard layouts. The project sparked discussion about the value of dedicated writing devices and the desire for simpler, more focused technology. Some users shared their own experiences with similar minimalist writing setups and offered alternative software suggestions.
Ashby, a Y Combinator-backed recruiting platform, is seeking Principal Product Engineers to join their growing team. They're looking for experienced engineers with strong product sense and a passion for building impactful software to improve the hiring process. Responsibilities include leading the design and development of core product features, mentoring other engineers, and contributing to the overall technical strategy. The ideal candidate possesses expertise in full-stack development, preferably with experience in Ruby on Rails and React. Ashby offers competitive compensation, benefits, and the opportunity to work on a product used by leading companies.
Several commenters on Hacker News expressed skepticism about Ashby's "Principal" Product Engineer role, pointing out what they perceived as a relatively junior-level description of responsibilities and questioning the title's appropriateness. Some suggested the listing was targeted towards less experienced engineers who might be drawn to the "Principal" title, while others wondered if it reflected a broader trend of title inflation in the tech industry. There was also discussion about Ashby's use of an Applicant Tracking System (ATS), with commenters debating the merits of such systems and their impact on the hiring process. A few commenters expressed interest in the company and its product, while others shared anecdotes about their own experiences with similar job titles and company cultures.
Right to Repair legislation has now been introduced in all 50 US states, marking a significant milestone for the movement. While no state has yet passed a comprehensive law covering all product categories, the widespread introduction of bills signifies growing momentum. These bills aim to compel manufacturers to provide consumers and independent repair shops with the necessary information, tools, and parts to fix their own devices, from electronics and appliances to agricultural equipment. This push for repairability aims to reduce electronic waste, empower consumers, and foster competition in the repair market. Though the fight is far from over, with various industries lobbying against the bills, the nationwide reach of these legislative efforts represents substantial progress.
Hacker News commenters generally expressed support for Right to Repair legislation, viewing it as a win for consumers, small businesses, and the environment. Some highlighted the absurdity of manufacturers restricting access to repair information and parts, forcing consumers into expensive authorized repairs or planned obsolescence. Several pointed out the automotive industry's existing right to repair as a successful precedent. Concerns were raised about the potential for watered-down legislation through lobbying efforts and the need for continued vigilance. A few commenters discussed the potential impact on security and safety if unqualified individuals attempt repairs, but the overall sentiment leaned heavily in favor of the right to repair movement's progress.
SubImage, a Y Combinator W25 startup, launched a tool that allows you to see your cloud infrastructure through the eyes of an attacker. It automatically scans public-facing assets, identifying vulnerabilities and potential attack paths without requiring any credentials or agents. This external perspective helps companies understand their real attack surface and prioritize remediation efforts, focusing on the weaknesses most likely to be exploited. The goal is to bridge the gap between security teams' internal view and the reality of how attackers perceive their infrastructure, leading to a more proactive and effective security posture.
The Hacker News comments section for SubImage expresses cautious interest and skepticism. Several commenters question the practical value proposition, particularly given existing open-source tools like Amass and Shodan. Some doubt the ability to accurately replicate attacker reconnaissance, citing the limitations of automated tools compared to a dedicated human adversary. Others suggest the service might be more useful for smaller companies lacking dedicated security teams. The pricing model also draws criticism, with users expressing concern about per-asset costs potentially escalating quickly. A few commenters offer constructive feedback, suggesting integrations or features that would enhance the product, such as incorporating attack path analysis. Overall, the reception is lukewarm, with many awaiting further details and practical demonstrations of SubImage's capabilities before passing judgment.
Larry Ellison's ambitious, half-billion-dollar investment in sustainable farming in Hawaii has largely failed to achieve its goals. His company, Sensei Farms, aimed to revolutionize agriculture with high-tech greenhouses and hydroponic techniques, promising locally grown produce and food security. However, after years of operation and significant financial losses, Sensei has dramatically scaled back its operations, laying off staff and abandoning plans for expansion. While the company claims to be pivoting towards research and development, the project is widely considered a costly misstep, demonstrating the difficulty of translating tech industry success to the complexities of agriculture.
Hacker News commenters are largely skeptical of Ellison's Lanai farming project. Many question the economic viability of high-tech, hydroponic farming at scale, especially given the transportation costs from a remote island. Some see it as a vanity project, disconnected from the realities of agriculture and food security. Others point out the irony of Ellison, known for his aggressive business practices, now promoting sustainability. A few commenters offer more nuanced perspectives, suggesting that the project's failure might stem from management issues rather than inherent flaws in the concept, while others highlight the difficulty of disrupting established industries like agriculture. Several comments also discuss the potential for unintended consequences, such as the impact on local water resources and the ethical implications of controlling food production.
Security researcher Eric Daigle discovered a significant vulnerability in several "smart" apartment intercom systems. By exploiting a poorly implemented API within these systems, he was able to remotely unlock building doors and individual apartment units using only his phone and publicly available information. He accomplished this by crafting specific HTTP requests that bypassed security measures, granting him unauthorized access. Daigle responsibly disclosed the vulnerability to the affected vendors, prompting them to address the issue and improve their security protocols. This highlighted the risk associated with insecure IoT devices and the importance of robust API security in connected building systems.
HN commenters discuss the prevalence of easily-exploitable vulnerabilities in building access control systems. Several highlight the inherent insecurity of relying solely on cellular connections for such critical infrastructure, pointing out the ease with which cellular signals can be intercepted or spoofed. Others note the conflict between convenience and security, acknowledging that many residents prioritize ease of access over robust protection. Some commenters share anecdotal experiences with similar vulnerabilities in their own buildings, while others suggest potential solutions, such as requiring secondary authentication factors or utilizing more secure communication protocols. The ethical implications of publicly disclosing such vulnerabilities are also debated, with some arguing for responsible disclosure while others emphasize the urgent need for awareness and immediate action. A few commenters question the author's decision to reveal specific technical details, fearing it could empower malicious actors.
This post provides a gentle introduction to stochastic calculus, focusing on the Ito integral. It explains the motivation behind needing a new type of calculus for random processes like Brownian motion, highlighting its non-differentiable nature. The post defines the Ito integral, emphasizing its difference from the Riemann integral due to the non-zero quadratic variation of Brownian motion. It then introduces Ito's Lemma, a crucial tool for manipulating functions of stochastic processes, and illustrates its application with examples like geometric Brownian motion, a common model in finance. Finally, the post briefly touches on stochastic differential equations (SDEs) and their connection to partial differential equations (PDEs) through the Feynman-Kac formula.
HN users generally praised the clarity and accessibility of the introduction to stochastic calculus. Several appreciated the focus on intuition and the gentle progression of concepts, making it easier to grasp than other resources. Some pointed out its relevance to fields like finance and machine learning, while others suggested supplementary resources for deeper dives into specific areas like Ito's Lemma. One commenter highlighted the importance of understanding the underlying measure theory, while another offered a perspective on how stochastic calculus can be viewed as a generalization of ordinary calculus. A few mentioned the author's background, suggesting it contributed to the clear explanations. The discussion remained focused on the quality of the introductory post, with no significant dissenting opinions.
MongoDB has acquired Voyage AI for $220 million. This acquisition enhances MongoDB's Realm Sync product by incorporating Voyage AI's edge-to-cloud data synchronization technology. The integration aims to improve the performance, reliability, and scalability of data synchronization for mobile and IoT applications, ultimately simplifying development and enabling richer, more responsive user experiences.
HN commenters discuss MongoDB's acquisition of Voyage AI for $220M, mostly questioning the high price tag considering Voyage AI's limited traction and apparent lack of substantial revenue. Some speculate about the true value proposition, wondering if MongoDB is primarily interested in Voyage AI's team or a specific technology like vector search. Several commenters express skepticism about the touted benefits of "generative AI" features, viewing them as a potential marketing ploy. A few users mention alternative open-source vector databases as potential competitors, while others note that MongoDB may be aiming to enhance its Atlas platform with AI capabilities to differentiate itself and attract new customers. Overall, the sentiment leans toward questioning the acquisition's value and expressing doubt about its potential impact on MongoDB's core business.
Laravel Cloud is a platform-as-a-service offering streamlined deployment and scaling for Laravel applications. It simplifies server management by abstracting away infrastructure complexities, allowing developers to focus on building their applications. Features include push-to-deploy functionality, databases, serverless functions, caching, and managed scaling, all tightly integrated with the Laravel ecosystem. This provides a convenient and efficient way to deploy, run, and scale Laravel projects from development to production.
Hacker News users discussing Laravel Cloud generally expressed skepticism and criticism. Several commenters questioned the value proposition compared to existing solutions like Forge and Vapor, noting the seemingly higher price and lack of clear advantages. Some found the marketing language vague and buzzword-laden, particularly the emphasis on "serverless." Others pointed out the potential vendor lock-in and the irony of a PHP framework, often used for simpler projects, needing such a complex cloud offering. A few commenters mentioned positive experiences with Forge and Vapor, indirectly highlighting the challenge Laravel Cloud faces in proving its worth. The overall sentiment leaned towards viewing Laravel Cloud as an unnecessary addition to the ecosystem.
A new islet cell transplantation technique has shown promise in reversing type 1 diabetes. Researchers developed a method using bioengineered "scaffolds" derived from pig tissue, which house insulin-producing islet cells. These scaffolds are implanted under the skin of the recipient, protecting the cells from immune system attack without requiring long-term immunosuppression. In a small clinical trial, all six participants with severe type 1 diabetes were able to stop insulin injections for at least a year after the transplant, with one participant insulin-free for over two years. While larger trials are needed, this new method offers a potentially less invasive and safer alternative to traditional islet transplantation for achieving insulin independence in type 1 diabetes.
HN commenters express cautious optimism about the islet transplantation technique described in the linked article. Several point out that while promising, the need for immunosuppressants remains a significant hurdle, potentially introducing more risks than the disease itself for some patients. Some discuss the limitations of current immunosuppressant drugs and the potential for future advancements in that area to make this treatment more viable. Others highlight the small sample size of the study and the need for larger, longer-term trials to confirm these initial findings. A few commenters share personal experiences with Type 1 diabetes, emphasizing the impact the disease has on their lives and their hope for a true cure. Finally, some discuss the possibility of using stem cells as a source for islets, eliminating the need for donor organs.
Bracket City is a daily online word puzzle that deconstructs the traditional crossword format. Instead of a grid, clues are presented in a bracket-style tournament, where players choose the correct answer from two options to advance. Each correct answer reveals letters that eventually combine to form the final solution word. This unique presentation adds a layer of strategy and deductive reasoning, as incorrect choices don't just leave a gap, but actively lead down the wrong path. The daily puzzle offers a fresh take on wordplay, challenging players to not just know the answers, but also to understand the relationships between them.
Hacker News users discussed the unusual format and difficulty of Bracket City. Several commenters found the puzzle too challenging, describing it as "obtuse" and expressing frustration with the lack of clear instructions or feedback. The unconventional grid and scoring system also drew criticism. Some users questioned the puzzle's description as a crossword, suggesting alternative classifications like a logic puzzle or code-breaking challenge. Despite the difficulty, some commenters expressed intrigue and a desire to understand the solving process better, with one suggesting a walkthrough or tutorial would be helpful. Others appreciated the novelty and different approach to puzzling, even if they found it personally too hard. The puzzle's creator responded to some comments, clarifying certain mechanics and acknowledging the steep learning curve.
Calendar.txt outlines a simple, universal calendar format based on plain text. Each line represents a day, formatted as YYYY-MM-DD followed by optional event descriptions separated by tabs. This minimalist approach allows for easy creation, parsing, and manipulation by any text editor or scripting tool, promoting interoperability across diverse platforms and applications. The post emphasizes the benefits of this format's portability, version control friendliness, and longevity, contrasting it with proprietary calendar systems that often lock users into specific software or data formats. The suggested structure allows for complex recurring events and to-do lists with simple extensions, making it adaptable to various scheduling needs.
Hacker News users discuss the minimalist approach of calendar.txt, appreciating its simplicity and portability. Some highlight its alignment with the Unix philosophy of doing one thing well. Others suggest improvements like adding support for recurring events or integration with other tools. A few users express skepticism, finding the plain text format too limiting for practical use, while others champion its accessibility and ease of parsing. The discussion also touches upon alternative calendar solutions and the benefits of plain text for archiving and data longevity. Several commenters share their personal workflows incorporating plain text files for task management and scheduling.
The American Rescue Plan Act (ARPA) is discreetly funding community-owned fiber optic networks, bringing affordable, high-speed internet access to underserved areas. These networks offer gigabit speeds for just $50-$65 per month, significantly undercutting incumbent ISPs often providing slower speeds at higher prices. This funding is helping bridge the digital divide by empowering communities to build and control their own internet infrastructure, fostering local economic development and improving access to essential services.
Hacker News commenters generally lauded the ARPA-funded community-owned fiber initiatives. Several pointed out the significant difference between publicly owned/community-owned networks and the usual private ISP model, highlighting the potential for better service, lower prices, and local control. Some expressed concerns about the long-term sustainability and scalability of these projects, questioning whether the initial funding would be enough and if these smaller networks could compete with established giants. Others noted the importance of community engagement and technical expertise for success. A recurring theme was the frustration with existing ISPs and their perceived lack of investment in underserved areas, with commenters expressing hope that these community projects could serve as a model for broader change. Several commenters also discussed the regulatory hurdles and lobbying power of incumbent ISPs, emphasizing the need for continued public support and advocacy for these alternative models.
TranslateManga offers a free web-based tool to instantly translate manga. Users simply upload a manga page image, and the service automatically detects text bubbles, translates them into the chosen language, and overlays the translation onto the original image. It supports a wide range of languages and aims to make reading manga in any language accessible and effortless. The translated manga pages can then be downloaded for offline viewing.
HN users discussed the legality and ethics of TranslateManga, given that it translates and republishes manga without explicit permission from copyright holders. Some expressed concern about the potential for abuse and negative impact on the manga industry, while others argued that it provides valuable access to content otherwise unavailable to non-Japanese speakers. Technical discussion centered around the quality of the translations, with some praising its accuracy while others pointed out frequent errors and awkward phrasing. Several commenters also suggested alternative translation methods and tools, and debated the practicality of machine translation versus human translation for manga. The potential for the site to improve language learning was also mentioned. A few users questioned the site's monetization strategy and the long-term viability of the project.
Powerful new magnets built for NASA's next-generation electric propulsion system have passed initial testing and are ready for space-like conditions. These magnets, made of a high-temperature superconducting material, are crucial to the Advanced Electric Propulsion System (AEPS) which aims to significantly shorten travel times for future deep-space missions like Mars trips. The magnets enable the Hall thruster to achieve higher power and efficiency compared to current technology, pushing spacecraft faster while using less propellant. They will now undergo rigorous testing in a vacuum chamber that simulates the harsh environment of space.
Hacker News commenters discuss the potential of the new magnet technology for electric propulsion. Some express excitement about the increased efficiency and power density offered by these superconducting magnets, envisioning applications beyond just the VASIMR engine, like fusion power. Others are more cautious, pointing to the challenges of maintaining cryogenic temperatures in space and the need for radiation shielding. Several commenters delve into technical details, comparing different thruster types (Hall effect, ion, etc.) and the specific advantages of high-temperature superconductors. There's also a thread discussing the complexities of testing in space and the long road to practical implementation for technologies like VASIMR. Overall, while acknowledging the hurdles, commenters seem optimistic about the progress and potential impact of this magnetic technology on space travel.
The Nieman Lab article highlights the growing role of journalists in training AI models for companies like Meta and OpenAI. These journalists, often working as contractors, are tasked with fact-checking, identifying biases, and improving the quality and accuracy of the information generated by these powerful language models. Their work includes crafting prompts, evaluating responses, and essentially teaching the AI to produce more reliable and nuanced content. This emerging field presents a complex ethical landscape for journalists, forcing them to navigate potential conflicts of interest and consider the implications of their work on the future of journalism itself.
Hacker News users discussed the implications of journalists training AI models for large companies. Some commenters expressed concern that this practice could lead to job displacement for journalists and a decline in the quality of news content. Others saw it as an inevitable evolution of the industry, suggesting that journalists could adapt by focusing on investigative journalism and other areas less susceptible to automation. Skepticism about the accuracy and reliability of AI-generated content was also a recurring theme, with some arguing that human oversight would always be necessary to maintain journalistic standards. A few users pointed out the potential conflict of interest for journalists working for companies that also develop AI models. Overall, the discussion reflected a cautious approach to the integration of AI in journalism, with concerns about the potential downsides balanced by an acknowledgement of the technology's transformative potential.
Modernist Cuisine: The Art and Science of Cooking is a groundbreaking six-volume set exploring the science behind culinary techniques. It delves into the physics and chemistry transforming ingredients, covering topics from traditional cooking methods to cutting-edge innovations like sous vide and spherification. Richly illustrated with stunning photography, including cutaway views of food and equipment, the books aim to empower both professional chefs and passionate home cooks to understand and advance their culinary practice. The set provides a comprehensive guide to modernist cooking, offering practical knowledge, innovative recipes, and detailed explanations of the scientific principles involved.
HN commenters discuss the high price but acknowledge the groundbreaking nature of Modernist Cuisine, with some having bought and appreciated the physical copies despite the cost. Several highlight the free online version as a great resource. Some debate the practicality of the techniques for home cooks, while others emphasize its importance for understanding food science. A few criticize the elitism perceived in molecular gastronomy, and others counter with its accessibility through the free online version and its contribution to culinary innovation. Several commenters mention using the book as a coffee table book, appreciating its beautiful photography and design. Finally, some suggest exploring the accompanying "Modernist Cuisine at Home" for more practical home cooking applications.
Microsoft has reportedly canceled leases for data center space in Silicon Valley previously intended for artificial intelligence development. Analyst Matthew Ball suggests this move signals a shift in Microsoft's AI infrastructure strategy, possibly consolidating resources into larger, more efficient locations like its existing Azure data centers. This comes amid increasing demand for AI computing power and as Microsoft heavily invests in AI technologies like OpenAI. While the canceled leases represent a relatively small portion of Microsoft's overall data center footprint, the decision offers a glimpse into the company's evolving approach to AI infrastructure management.
Hacker News users discuss the potential implications of Microsoft canceling data center leases, primarily focusing on the balance between current AI hype and actual demand. Some speculate that Microsoft overestimated the immediate need for AI-specific infrastructure, potentially due to inflated expectations or a strategic shift towards prioritizing existing resources. Others suggest the move reflects a broader industry trend of reevaluating data center needs amidst economic uncertainty. A few commenters question the accuracy of the reporting, emphasizing the lack of official confirmation from Microsoft and the possibility of misinterpreting standard lease adjustments as a significant pullback. The overall sentiment seems to be cautious optimism about AI's future while acknowledging the potential for a market correction.
Some Windows filenames appear unreadable due to the way Windows handles characters outside the Basic Multilingual Plane (BMP). While newer versions support Unicode, older NTFS implementations only understand UTF-16, which uses surrogate pairs to represent these extended characters. A surrogate pair is two special 16-bit code units that together represent a single character outside the BMP. If a filename contains such a character and is accessed by a system or application that doesn't properly interpret surrogate pairs, it can't reconstruct the intended character, resulting in a garbled or unreadable filename. This issue primarily arises with older software or when transferring files between systems with different Unicode handling capabilities.
HN users discuss various aspects of surrogate pairs and Unicode. Several commenters highlight the complexity and nuances of Unicode handling, particularly in different programming languages and operating systems. Some mention the challenges of correctly processing and displaying these characters, with specific examples of issues encountered in Windows and other environments. The discussion also touches upon the historical context of surrogate pairs, the difference between UTF-16 and UTF-8, and the importance of proper encoding and decoding. A few commenters offer practical advice and resources for dealing with surrogate pairs, including libraries and tools. There's a general agreement that handling Unicode correctly requires careful attention and a deep understanding of its intricacies.
Frustrated with excessive phone use, the creator developed "Touch Grass," an Android app designed to encourage breaks from screen time. The app uses GPS to confirm the user is physically outside and then starts a timer. Only after spending a user-defined amount of time outdoors will the app grant access to blocked apps, effectively locking the user out until they've "touched grass." This gamified approach aims to promote healthier digital habits and reconnect users with the real world.
Hacker News commenters generally found the "touch grass" app amusing, but impractical. Several questioned the effectiveness of physically touching grass through a phone screen, noting the inherent irony and missing the point of the idiom. Some suggested improvements like requiring a photo of actual grass or GPS verification of being outdoors. Others highlighted the performative nature of the app, comparing it to other avoidance techniques. A few commenters appreciated the humor and simple execution, viewing it as a lighthearted take on the problem of doomscrolling. Some pointed out the potential for addictive gamification of "touching grass" itself. Overall, the consensus leaned towards the app being a fun, albeit slightly absurd, commentary on internet overuse rather than a serious solution.
Neal Stephenson's "Wrong 5" argues that Thomas More's Utopia hypocritically condemns individual acquisitiveness while simultaneously advocating for England's imperial expansion and resource extraction under the guise of "improvement." More portrays Utopians as morally superior for rejecting private property, yet Stephenson contends this stance ignores the exploitative nature of acquiring resources and labor to establish and maintain Utopia's seemingly idyllic state. He highlights the inherent contradiction of More, a wealthy lawyer serving a rapacious empire, decrying individual greed while remaining silent about the systemic greed driving England's colonial ambitions. Essentially, Stephenson posits that Utopia serves as a veiled justification for powerful entities seizing resources under the pretense of societal betterment, a process mirroring England's contemporary actions.
The Hacker News comments generally agree with Stephenson's critique of Thomas More's Utopia, finding his vision naive and impractical. Several commenters point out the hypocrisy of More's personal wealth and position contrasting with the communist ideals he espouses in Utopia. Some discuss the inherent difficulties and contradictions in attempting to design a perfect society, citing issues of human nature and the potential for tyranny. Others find value in utopian thought experiments, even if flawed, as they can spark discussion and inspire incremental improvements. A few commenters delve into More's religious context and the historical influences on his writing, suggesting that modern interpretations may miss nuances of his intent. One commenter highlights the darkly satirical elements of Utopia, arguing that it shouldn't be taken entirely at face value.
GGInsights offers free monthly dumps of scraped Steam data, including game details, pricing, reviews, and tags. This data is available in various formats like CSV, JSON, and Parquet, designed for easy analysis and use in personal projects, market research, or academic studies. The project aims to provide accessible and up-to-date Steam information to a broad audience.
HN users generally praised the project for its transparency, usefulness, and the public accessibility of the data. Several commenters suggested potential applications for the data, including market analysis, game recommendation systems, and tracking the rise and fall of game popularity. Some offered constructive criticism, suggesting the inclusion of additional data points like regional pricing or historical player counts. One commenter pointed out a minor discrepancy in the reported total number of games. A few users expressed interest in using the data for personal projects. The overall sentiment was positive, with many thanking the creator for sharing their work.
The author details their initial struggles and eventual success finding freelance clients as a web developer. Leveraging existing connections, they reached out to former colleagues and utilized their alumni network, securing a small project that led to a larger, ongoing contract. Simultaneously, they explored freelance platforms, ultimately finding Upwork ineffective but achieving significant success on a niche platform called Codeable. Focusing on a specific skillset (WordPress) and crafting a strong profile, they quickly gained traction, attracting higher-paying clients and establishing a steady stream of work through consistent proposals and high-quality deliverables. This two-pronged approach of networking and niche platform targeting proved effective in building a sustainable freelance career.
Hacker News users generally found the advice in the linked article to be common sense, with several pointing out that networking and referrals are the most effective methods for freelancers to find clients. Some commenters emphasized the importance of specializing in a niche and building a strong online presence, including a portfolio website. Others shared their own experiences with cold emailing, which had mixed results. One commenter questioned the value of platforms like Upwork and Fiverr, while another suggested focusing on larger companies. The overall sentiment was that the article offered a decent starting point for new freelancers but lacked groundbreaking insights.
Apple announced a plan to invest over $500 billion in the US economy over the next four years. This builds on the $430 billion contributed over the previous five years and includes direct spending with US suppliers, data center expansions, capital expenditures in US manufacturing, and investments in American jobs and innovation. The company highlights key areas like 5G innovation and silicon engineering, as well as supporting emerging technologies. Apple's commitment extends beyond its own operations to include investments in next-generation manufacturing and renewable energy projects across the country.
Hacker News commenters generally expressed skepticism about Apple's announced $500B investment. Several pointed out that this is not new spending, but a continuation of existing trends, repackaged as a large number for PR purposes. Some questioned the actual impact of this spending, suggesting much of it will go towards stock buybacks and dividends rather than job creation or meaningful technological advancement. Others discussed the potential influence of government incentives and tax breaks on Apple's decision. A few commenters highlighted Apple's reliance on Asian manufacturing, arguing that true investment in the US would involve more domestic production. Overall, the sentiment leaned towards viewing the announcement as primarily a public relations move rather than a substantial shift in Apple's business strategy.
Apple announced a plan to invest $430 billion in the US economy over five years, creating 20,000 new jobs. This investment will focus on American-made components for its products, including a new line of AI servers. The company also highlighted its commitment to renewable energy and its growing investments in silicon engineering, 5G innovation, and manufacturing.
Hacker News users discuss Apple's announcement with skepticism. Several question the feasibility of Apple producing their own AI servers at scale, given their lack of experience in this area and the existing dominance of Nvidia. Commenters also point out the vagueness of the announcement, lacking concrete details on the types of jobs created or the specific AI applications Apple intends to pursue. The large $500 billion figure is also met with suspicion, with some speculating it includes existing R&D spending repackaged for a press release. Finally, some express cynicism about the announcement being driven by political motivations related to onshoring and subsidies, rather than genuine technological advancement.
RadiaCode is a Python library designed to interface with RadiaCode-101, a handheld radiation detector. It enables users to easily retrieve real-time radiation measurements, including CPM, uSv/h, and accumulated dose, directly from the device. The library handles the serial communication and data parsing, providing a simplified API for data acquisition and analysis in Python applications. This allows for convenient integration of radiation monitoring into various projects, such as environmental monitoring or personal safety applications.
Hacker News users discuss the RadiaCode Python library, praising its clean implementation and cross-platform compatibility. Some express interest in using it with other Geiger counters, particularly older Soviet models. The project's open-source nature and availability on PyPI are seen as positives. One commenter suggests adding a feature for GPS tagging of measurements for creating radiation maps, which the project author acknowledges as a valuable future addition. There's also a brief discussion about the differences in communication protocols used by various Geiger counters.
The author explains their extensive use of Org Mode, an Emacs extension, as a powerful, all-encompassing tool beyond simple note-taking. They highlight its flexibility for managing writing projects, from initial brainstorming and outlining to drafting, editing, and publishing. Org Mode's structured format, using plain text and simple markup, facilitates easy reorganization, version control with Git, and export to various formats like HTML and PDF. The author demonstrates how features like tags, links, and the ability to embed code and results directly into documents make it ideal for technical writing, literate programming, and project management, ultimately creating a unified system for knowledge creation and organization.
Hacker News users generally praised the article for its clear explanation of Org Mode's benefits and the author's workflow. Several commenters shared their own experiences and tips for using Org Mode, highlighting its versatility for tasks beyond writing, such as project management and note-taking. Some discussed the learning curve associated with Org Mode, acknowledging its initial complexity but emphasizing the long-term payoff. A few users mentioned alternative tools, but the overall sentiment leaned towards appreciating Org Mode's powerful features and extensibility. The discussion also touched upon the advantages of plain text and the philosophical appeal of owning your data.
This 2018 paper demonstrates how common spreadsheet software can be used to simulate neural networks, offering a readily accessible and interactive educational tool. It details the implementation of a multilayer perceptron (MLP) within a spreadsheet, using built-in functions to perform calculations for forward propagation, backpropagation, and gradient descent. The authors argue that this approach allows for a deeper understanding of neural network mechanics due to its transparent and step-by-step nature, which can be particularly beneficial for teaching purposes. They provide examples of classification and regression tasks, showcasing the spreadsheet's capability to handle different activation functions and datasets. The paper concludes that spreadsheet-based simulations, while not suitable for large-scale applications, offer a valuable pedagogical alternative for introducing and exploring fundamental neural network concepts.
HN users discuss the practicality and educational value of simulating neural networks in spreadsheets. Some find it a clever way to visualize and understand the underlying mechanics, especially for beginners, while others argue its limitations make it unsuitable for real-world applications. Several commenters point out the computational constraints of spreadsheets, making them inefficient for larger networks or datasets. The discussion also touches on alternative tools for learning and experimenting with neural networks, like Python libraries, which offer greater flexibility and power. A compelling point raised is the potential for oversimplification, potentially leading to misconceptions about the complexities of real-world neural network implementations.
Summary of Comments ( 8 )
https://news.ycombinator.com/item?id=43162544
HN commenters express skepticism about the impact of this research. Several doubt the practicality, pointing to existing simulations and the complex, chaotic nature of wind making precise calculations less relevant. Others question the "100-year-old math problem" framing, suggesting the Betz limit is well-understood and the research likely focuses on a specific optimization problem within that context. Some find the article's language too sensationalized, while others are simply curious about the specific mathematical advancements made and how they're applied. A few commenters provide additional context on the challenges of wind farm optimization and the trade-offs involved.
The Hacker News post "Student refines 100-year-old math problem, expanding wind energy possibilities" has generated a moderate discussion with several interesting points raised in the comments section.
Several commenters delve into the specifics of the Betz limit and its implications. One commenter clarifies that the Betz limit applies to single turbines, not entire wind farms, and highlights how farm layout optimizations can achieve higher overall power extraction than the Betz limit suggests for individual turbines. They further discuss the trade-offs involved, such as increased turbulence and reduced efficiency for downstream turbines, necessitating careful spacing and arrangement.
Another commenter questions the practicality of the student's research, arguing that exceeding the Betz limit for a single turbine might not be as significant as improving the efficiency of existing turbine designs within the existing limit. They suggest that focusing on practical advancements in materials, manufacturing, and maintenance could yield greater overall benefits.
Another thread of discussion focuses on the potential impact of the research on vertical-axis wind turbines (VAWTs). One commenter speculates that the advancements might be more relevant to VAWTs due to their different operational principles and potential for interacting with wind in a way that circumvents some limitations of traditional horizontal-axis turbines. This sparked further debate about the current challenges and limitations of VAWT technology.
Several commenters also express skepticism about the framing of the news release, pointing to the sensationalized language and suggesting that the actual scientific breakthrough might be less revolutionary than portrayed. They emphasize the importance of peer review and further research to validate the student's findings. There's also discussion of the challenges in translating theoretical advancements into practical engineering solutions.
Finally, a few commenters share additional resources and links to relevant research papers and articles for those interested in diving deeper into the technical details of the topic. These resources offer further context and background information beyond the initial news release.