1. Show HN: Simulating 20M Particles in JavaScript
Total comment counts : 22
Summary
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Top 1 Comment Summary
The article suggests embedding a simulation in a blog post to improve the user experience. It mentions the importance of optimizing the simulation for older devices or adjusting it based on frame rate. The article also provides a link to a popular website that showcases embedded simulations. Additionally, it suggests that running a particle simulation on a GPU may not require WebGPU and provides a link for further reference.
Top 2 Comment Summary
The article is a demo of a mobile game called “Sabby.” The author describes it as incredible to play with and provides a link to access the demo.
2. Do Skis Get Blunt?
Total comment counts : 26
Summary
The article discusses the claim made by a retired Olympic ski tuner that ski tuning is a scam and that keeping skis dry is all that is needed to maintain sharpness. The author, however, disagrees with this claim and provides evidence of abrasion damage on ski edges. They explain that ski edges can become rounded and have small metal chunks ripped out, affecting the performance of the skis. The author describes their own method of fixing this damage using a 3D printed jig and a diamond stone. They emphasize the importance of sharp skis for a better experience on icy slopes. The article concludes by stating that the author’s opinions are their own and not representative of their employer.
Top 1 Comment Summary
The article discusses the importance of sharp edges and proper bevels on ski equipment, particularly for racing. It emphasizes that having sharp edges and the correct bevels is crucial when skiing on hard or water-injected snow. The author agrees with the comments made by experienced individuals and suggests that once the edge angles are set, using a diamond stone should be sufficient to restore the edge shape after use, without the need for filing. However, if the edges are damaged with rocks or rust, additional measures may be required. The article also mentions that the practicality of maintaining ski edges with a diamond stone depends on factors such as owning personal equipment, being a skilled skier who benefits from tuned edges, and having the technical ability to use a diamond stone effectively. Overall, the author appreciates the discussion on skiing maintenance presented in the article.
Top 2 Comment Summary
The article discusses the importance of tuning ski edges based on the type of skier and skis being used. For ski racers and those riding groomers aggressively, tuning edges is important. However, for skiers who ride big powder skis or primarily ski in the park, the state of the edges matters less. For beginner or intermediate skiers, having blunter edges can actually help by making slide turns easier and requiring less force. The author mentions personal experience of using skis that haven’t been sharpened in years but still perform well.
3. Reverse engineering Ticketmaster’s rotating barcodes
Total comment counts : 52
Summary
The article discusses the author’s frustration with TicketMaster’s new ticketing system, Mobile Entry. Instead of receiving printable PDF tickets, customers are now issued tickets with rotating barcodes that can only be accessed through TicketMaster’s website or app. The author highlights the drawbacks of this system, including the reliance on internet connection, the risk of barcode malfunctions, and the lack of phone support. TicketMaster claims that this new technology reduces the risk of fraud, but the author expresses doubts and criticizes TicketMaster for forcing customers to use their app. The article suggests that TicketMaster’s motivation for implementing this system may be more about benefiting the company than providing a better experience for customers.
Top 1 Comment Summary
The article discusses the issue of ticket resale scams and the role of TicketMaster and AXS in addressing this problem. The author quotes a source named Conduition who claims that these companies have not taken advantage of opportunities to support scam-free third-party ticket resale platforms. The source suggests that TicketMaster and AXS could have implemented better technology to prevent scams, but instead choose to profit from their monopoly on resale.
Top 2 Comment Summary
The article points out that Ticketmaster’s business model involves deceiving the public so that artists and venues can avoid any backlash. It discusses how Taylor Swift, who wants her fans to be able to afford her concert tickets, has a manager who aims to maximize profits. The manager makes a deal with Ticketmaster to sell a limited number of tickets at a lower price and then resells the remaining tickets at a higher price on secondary sites. This scheme allows the manager to profit while making it seem like Swift is not involved in money-grabbing tactics. The article also mentions other questionable practices of Ticketmaster, including adding extra charges, creating urgency to buy tickets, and giving kickbacks to venues.
4. Detect Migrating Birds with a Plastic Dish and a Cheap Microphone
Total comment counts : 7
Summary
The article discusses the use of acoustic bird detectors to identify nocturnal migrators. Birds migrate at night for various reasons, including avoiding predators and using stars for navigation. Radar studies have proved successful in showing where and when birds migrate at night, but they cannot identify species. Recording the calls of birds during their nocturnal travels can help identify the species. The article provides a simple and inexpensive setup for recording bird calls, which includes a microphone, preamplifier, parabolic dish, and sound card. The article also mentions the use of a software called Raven Lite to analyze the recorded sounds.
Top 1 Comment Summary
The article discusses an AI program called Merlin that can be used on smartphones to recognize bird vocalizations. This program has revolutionized the way birding is done, as it can detect and identify bird species in real time, often before the observer can do so themselves.
Top 2 Comment Summary
The article discusses the author’s collaboration on a project that involves using a distributed network of dumb recorders located within a 50-mile radius of their home.
5. Boeing to plead guilty to criminal fraud charge stemming from 737 MAX crashes
Total comment counts : 34
Summary
Boeing has agreed to plead guilty to criminal fraud related to the 737 Max crashes and will pay a fine of up to $487.2 million. However, the Justice Department recommended that the court credit Boeing with half that amount, resulting in a fine of $243.6 million. The plea deal requires the approval of a federal judge. If accepted, it could complicate Boeing’s ability to sell products to the U.S. government as a felon, but the company could seek waivers. The deal also includes an independent monitor to oversee compliance at Boeing for three years and requires the company to invest at least $455 million in compliance and safety programs.
Top 1 Comment Summary
Paul Cassell, a lawyer representing the victims’ family members, intends to request that the federal judge overseeing the case refuse the deal. Instead, Cassell wants a public trial where all the facts surrounding the case can be discussed openly and fairly before a jury.
Top 2 Comment Summary
The 2002 Sarbanes-Oxley Act holds top corporate executives liable if they knowingly sign off on false financial reports, with penalties including prison terms and fines. However, there are challenges in applying this law in practice, as explained in the linked article.
6. A Mini Monitor for a Pi
Total comment counts : 18
Summary
This article outlines the steps the author took to use a small 2-inch display as a monitor for their Raspberry Pi. They wanted to create a handheld “console” that could be used as a normal computer. The author provides details on the display they used and how they wired it to the Raspberry Pi. They also discuss the commands and data needed to interact with the display. After some tinkering, they were able to successfully address specific sections of the display and modify how images were shown. The author concludes the article by sharing the source code for the display mirroring program and providing instructions for setting up the hardware.
Top 1 Comment Summary
The article recommends a tip for working with Dupont connectors. Instead of having multiple cables connected to a single pin header using 1x1 plastic housings, it suggests removing the cables from their individual housings and placing them into a single Nx1 housing. This will help prevent the cables from disconnecting themselves from the pin header. The tip also suggests using different Nx1 and Nx2 housings depending on the cable grouping, and mentions the option of using a …x2 connector for pin headers with two rows. The article concludes by expressing confidence that this tip will be beneficial.
Top 2 Comment Summary
The author of the article struggled to find a case for a small display they needed for a home project. They considered 3D printing one but didn’t have access to a 3D printer. Buying a pre-made 3D printed case also didn’t seem like a good option. Eventually, the author found a second-hand tablet and used it as a display for their project. The tablet was slim, had a touch screen, came in a case, and was cheaper than other display options they had considered.
7. Managing Oneself (2005)
Total comment counts : 9
Summary
This article discusses the importance of managing one’s own career in today’s rapidly changing world. It emphasizes the need for individuals to develop themselves, understand their strengths, and find ways to make a meaningful contribution to their organizations and communities. The article suggests that successful careers are not planned out in advance, but rather develop when individuals are prepared for opportunities and have carefully assessed their unique characteristics. It encourages readers to take responsibility for managing their own futures, both inside and outside of the workplace.
Top 1 Comment Summary
This article is part of the Harvard Business Review’s book, “HBR’s 10 Must Reads on Managing Yourself.” The book is part of the HBR 10 Must Read Series, which includes various articles and books on management. The article focuses on self-management and includes a bonus article titled “How Will You Measure Your Life?” by Clayton M. Christensen.
Top 2 Comment Summary
The author argues that understanding one’s own learning style is a straightforward process. They suggest that this knowledge should not be kept private, despite the lack of people openly expressing their preferences on social media profiles. The author implies that this hesitance may stem from concerns about being inundated with educational spam.
8. Tiny robots with a big impact: microrobots for single-cell handling
Total comment counts : 10
Summary
Scientists have developed a family of laser-operated microrobots that can manipulate single cells. These nanoscale robots work in conjunction with optical tweezers, which are laser beams used to trap microscopic objects. The microrobots are thin and flexible enough to grip cells without damaging them. They can be used to transfer cells, rotate cells for imaging, and press cells together to study their reactions. The researchers used a process called two-photon polymerization to create the microrobots, which involves using light to harden a polymer at specific spots. The microrobots provide a non-destructive way to manipulate and image single cells in their natural environment. While these tools are still specialized, laboratories equipped with the necessary technology can modify and optimize them for different tasks.
Top 1 Comment Summary
The article describes the construction of micro-robots using a technique called two-photon polymerization. These micro-robots are actuated by laser tweezers and are designed to avoid heating up biological specimens. The paper provides more details on this topic.
Top 2 Comment Summary
The author proposes the idea of developing a nano/micro bot that can replace hair roots and stimulate hair growth using nutrients found in the bloodstream or applied topically. They acknowledge that while there may be more pressing issues to address, they believe that creating hair follicles could be a simpler task compared to growing organs in laboratories.
9. Xpra: Persistent Remote Applications for X11
Total comment counts : 16
Summary
The article discusses the features and capabilities of Xpra, an open-source software that provides remote access to individual graphical applications. It allows users to run X11 programs on a remote host and display their output on their local machine. Xpra can be used for screen sharing, accessing existing desktop sessions, and starting remote desktop sessions. It supports various network protocols and integrates seamlessly with the client’s desktop environment, including audio input/output, printers, clipboard, notifications, and more. The article also provides information on installation, usage examples, security measures, and support channels for the Xpra project.
Top 1 Comment Summary
The article mentioned is a description of a workflow demonstration that the user saw a few years ago on Reddit. Unfortunately, the link provided is not accessible.
Top 2 Comment Summary
The author of the article tried using Xpra as a remote desktop alternative when they switched from Windows to Linux. They used Xpra for some time before discovering NoMachine, which they found to have a more similar feel to a local machine. Despite this, the author expresses interest in trying Xpra again but has a long list of other things they would like to try.
10. How the continuum hypothesis could have been a fundamental axiom
Total comment counts : 4
Summary
The article discusses how the continuum hypothesis could be seen as a fundamental axiom in mathematics. It explores the idea that the hypothesis is necessary for mathematics, particularly in calculus. The author argues that alternative foundational schemes do not offer anything new in the arithmetical realm, except potentially for Grothendieck universes. However, taking the existence of a countably additive real valued measure as fundamental has concrete consequences for measurables and descriptive set theory questions. The article also considers the possibility of adopting axioms inconsistent with ZFC and concludes that no alternative historical development would contradict ZF about arithmetical statements. The author supports the idea that the continuum hypothesis should be taken as the most fundamental axiom in mathematics but acknowledges that its historical development through countable numbers has led to the present view. The article touches on the difference between mathematics and physics, with the author suggesting that the “quantum hypothesis” is the most fundamental axiom in theoretical physics.
Top 1 Comment Summary
I’m sorry, but I am unable to access or summarize specific URLs or files. However, if you can provide me with the text content of the article, I would be happy to summarize it for you.
Top 2 Comment Summary
The article discusses a historical thought experiment about mathematicians accepting the Continuum Hypothesis (CH) early on. It suggests that accepting CH would make mathematicians less hesitant to use nonstandard analysis. The article also mentions a separate thought experiment that rejects the Continuum Hypothesis, which can be found at the provided link.