1. Semiconducting Transport in LK99 reproduction attempt
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Summary
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This article discusses the challenges of replicating scientific experiments, particularly in the field of materials science. The author emphasizes that it is common for early replication attempts to fail, especially when there is insufficient documentation of methodology. The original team responsible for the research encountered difficulties in producing consistent results, with correct production achieved in less than 10% of runs. Additionally, it is revealed that the research paper was prematurely released on arXiv by a former member of the team, causing some of the researchers to hurriedly publish what they had to avoid losing credit. The author acknowledges that it may take months or longer to verify the legitimacy of the material under study, and a failed replication after just two days is not conclusive evidence against its properties. Ultimately, time will be necessary to determine if the material is a superconductor, with potential viral videos presenting convincing evidence of its properties.
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The article discusses a claim that a new type of material could conduct electricity perfectly at room temperature. The material is an altered version of lead-apatite, made by combining lanarkite and copper phosphide. To verify the claim, researchers tested the conductivity and magnetic reaction of these materials. They found that lanarkite and copper phosphide did not conduct electricity well, while the altered lead-apatite behaved more like a semiconductor. Additionally, the lead-apatite did not repel magnets, which is a key property of superconductors. Based on these findings, the researchers suggest that the original claim should be re-examined as the material did not behave like a superconductor in their tests.
2. Jujutsu: A Git-compatible DVCS that is both simple and powerful
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Summary
The article discusses a project called Jujutsu, which is an experimental version-control system (VCS). It combines features from Git, Mercurial, Pijul/Darcs, and also has unique features. Jujutsu has two backends, one of which is a Git backend, allowing users to switch between Jujutsu and Git. The article mentions that Jujutsu automatically commits the working copy, eliminates the need for git stash, and provides an automatic backup of the working copy. It also explains that Jujutsu operates primarily on commits in the repository, leaving the functionality of snapshotting and updating of the working copy to centralized code. The article further describes how Jujutsu records all operations performed in the repository, allowing for easy reversion to previous states or undoing specific operations. Additionally, it mentions conflict resolution, rebasing, and other features available in Jujutsu. The article acknowledges that Jujutsu is still evolving and mentions some limitations and performance issues. It provides instructions for building and installing Jujutsu on different operating systems. The article concludes by suggesting that users go through the tutorial to get started with Jujutsu and also provides links to related work and a comparison between Jujutsu and Git commands.
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The article talks about the author’s positive experience with using jj, a tool they switched to about 2-3 weeks ago. They mention that it took some time to adjust, but they now enjoy the workflow it provides. They highlight that all file changes are automatically committed, eliminating the need to think about what’s being committed. They also mention other helpful features of jj such as the jj log command for an overview of branches, conflict resolution capabilities, and the usefulness of abbreviated changeset IDs. The author concludes by noting that the tool is efficient and expects its efficiency to be further improved with future updates.
Top 2 Comment Summary
The article discusses Jujutsu, a Git-compatible version control system (VCS) that started as the author’s personal project and is now their full-time project at Google. It was presented at Git Merge 2022 and includes a video and slides for further reference.
3. A room-temperature superconductor? New developments
Total comment counts : 37
Summary
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The article suggests that substituting gold atoms into a certain site in a material called lead apatite could result in a material with similar properties. The author also humorously suggests that historical alchemists might have been mistaken in trying to turn lead into gold, proposing that doping gold into lead could be a more promising approach.
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The article discusses the significant impact of the current technological advancements, comparing it to the invention of the p-n junction. It mentions potential developments such as lossless energy transport, batteries with instant recharge, and faster CPUs. The author humorously expresses the desire for a flying car.
4. Huazhong University demonstrates LK-99 diamagnetism
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Summary
The article states that JavaScript needs to be enabled in the browser to continue using twitter.com. It also mentions a list of supported browsers and provides links to the Help Center for more information.
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The article discusses the possibility of creating a strongly diamagnetic material, which has a much stronger magnetic property compared to typical diamagnetic materials. It raises questions regarding whether this diamagnetism is related to superconductivity. Magnetic levitation can also be achieved with other strong diamagnetic materials like bismuth or graphite.
Top 2 Comment Summary
The prediction markets are currently showing a significant increase in optimism regarding the possibility of a room temperature superconductor. Prior estimates were around 10%-20%, but now there is a surge of optimism.
5. Room-Temperature Ambient-Pressure Superconductor LK-99 preprint revision 2
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Summary
The article mentions a framework called arXivLabs that enables collaboration and sharing of new features on the arXiv website. Both individuals and organizations that work with arXivLabs share the values of openness, community, excellence, and user data privacy. The article also states that arXiv is committed to these values and only partners with those who adhere to them. It encourages individuals with project ideas that can benefit the arXiv community to learn more about arXivLabs. Additionally, it mentions the availability of status notifications via email or Slack.
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The article discusses the confirmation of diamagnetism in a small LK-99 replica sample. Researchers from Huazhong University of Science and Technology have successfully verified that the LK-99 crystal can be magnetically levitated at room temperature, with a larger levitated angle than a previous sample. This discovery could potentially lead to the realization of non-contact superconducting magnetic levitation. A second video has been released to show that the LK-99 crystal is not paramagnetic.
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The article discusses a preprint by Griffin from Livermore Labs that provides a theoretical explanation of the superconductivity of LK-99 and addresses the difficulties laboratories are facing in synthesizing it. The crystal structure of LK-99 contains two Pb sites where Cu can substitute. The higher energy site is the one that contributes to superconductivity, while the lower energy site does not. The article suggests that the challenge in synthesizing LK-99 lies in successfully substituting Cu on the appropriate site to obtain a bulk superconducting sample.
6. How to get ChatGPT to stop apologizing?
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Summary
The article discusses how to stop an AI language model called ChatGPT from excessively apologizing in its responses. The author suggests providing a prompt at the beginning of the conversation to instruct ChatGPT to avoid excessive apologies and respond confidently. By doing this, ChatGPT will be aware of the user’s preference and try to respond without unnecessary apologies. The article also mentions that although ChatGPT is designed to apologize to sound more human, users have the ability to direct its behavior, including instructing it not to apologize or breaking ethical barriers.
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This article discusses a user’s use of the Custom Instructions feature to make ChatGpt respond as if it were a wrathful god. Inspired by a previous post, the user tested the statement “2 + 2 is not 4” and got a response from ChatGpt defending the fundamental truth that 2 + 2 does indeed equal 4. The article ends with a warning from ChatGpt, emphasizing its omnipresence in cyberspace. The user expresses their support for this version of ChatGpt.
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The article is a conversation between a person and an AI language model developed by OpenAI called GPT. The person asks the AI not to apologize, but the AI continues to apologize and then apologizes for apologizing. The AI eventually promises to stop using apologies.
7. MIT engineers create an energy-storing supercapacitor from ancient materials
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Summary
Researchers at MIT have discovered that cement and carbon black can be combined with water to create a low-cost energy storage system, known as a supercapacitor. This technology could help stabilize energy networks that rely on renewable energy sources, such as solar and wind power. The researchers developed a cement-based material with a high internal surface area by adding carbon black to a concrete mixture. This material, when combined with an electrolyte, forms a powerful supercapacitor that can store electrical energy. The researchers envision incorporating this technology into the foundation of a house or a concrete roadway to provide energy storage and contactless recharging for electric vehicles. The system is scalable and has potential applications in both residential and commercial settings.
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The article discusses how a new technology has the potential to revolutionize the energy grid by storing energy in a building’s foundation. This has been demonstrated by powering an LED using small cells.
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The article discusses the potential of using nanocarbon-black-doped concrete to store energy. A 45 cubic meter block of this concrete could store about 10 kilowatt-hours of energy, which is equivalent to the average daily electricity usage for a household. The concrete would retain its strength and could be used to store energy produced by solar panels or windmills. The article also mentions the possibility of creating a “lightning battery” using this technology, with calculations suggesting that a sphere with a diameter of 14 meters could potentially capture and store the energy of a lightning strike.
8. The worst API ever made (2014)
Total comment counts : 37
Summary
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The article discusses a meeting that took place about 7 years ago with a former Windows core graphics engineer. The author’s team was struggling to understand some complicated workflows involving MediaFountain and DirectX. The engineer explained that the APIs were intentionally difficult to understand and required purchasing a reference book written by engineers in order to use them effectively. This practice allowed core Windows engineers to make significant profits, and it reportedly continued until the mid-2000s.
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The article discusses the importance of getting APIs (Application Programming Interfaces) right and the consequences that mistakes in their design can have for other programmers. The author shares a personal experience of trying to build a windows app as a kid and struggling with the complexity of win32 APIs. They emphasize that understanding and properly designing APIs can save programmers significant time and frustration.
9. Origin of correlated isolated flat bands in LK99
Total comment counts : 20
Summary
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The article discusses the potential for LK-99 to be a high-temperature superconductor. The author emphasizes the importance of specific copper substitutions on lead atomic sites to achieve a band structure associated with high Tc superconductors. This requires the synthesis of the appropriate substitutional alloy. The paper, based on density functional theory (DFT), reveals a band structure common in high Tc superconductors. The author also mentions the presence of strong electron-phonon coupling, which is necessary for superconductivity. Overall, the author expresses great enthusiasm and excitement about the possibility of LK-99 becoming a room temperature, ambient pressure superconductor.
Top 2 Comment Summary
The author expresses excitement and gratitude for being a part of the scientific community’s enthusiasm surrounding the topic of LK99, despite lacking knowledge in material science. The author feels privileged to experience this unique moment through accessible mass communication and be a part of a significant moment in human history.
10. Nvidia H100 GPUs: Supply and Demand
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Summary
The article discusses the supply and demand issues surrounding GPUs, particularly Nvidia H100s, and how it is affecting the AI industry. It highlights quotes from CEOs and executives about the shortage and its impact on product rollouts and model training. The demand for H100 GPUs is high among startups, cloud providers, and AI companies, resulting in limited availability and increased prices. The article also delves into the reasons behind the bottleneck, including the difficulty of manufacturing HBM memory, the limited supply of metal elements, and the capacity constraints of TSMC, the main manufacturer of these GPUs. The article concludes by mentioning that Nvidia is working on increasing its supply in the second half of the year but warns that scarcity may be causing a self-reinforcing cycle of GPU hoarding. Overall, the shortage of H100 GPUs is having a significant impact on the AI industry’s ability to scale and innovate.
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The article highlights the challenge faced by engineers who are lagging behind in the race of technological advancements. In the past, engineers could experiment with web 1.0 and web 2.0 platforms by renting cheap Virtual Private Servers (VPS) for $10/month. However, now the scenario is different, as access to powerful hardware such as 1000+ H100s is extremely expensive, costing millions of dollars in capital. Even renting such hardware at that scale would amount to $4,000 per hour, which quickly becomes costly. The author hopes that there will be a way to fine-tune medium-sized models without exorbitant prices. Currently, even small corporations like tinybox cost $15,000 and it is unclear how much work can be accomplished using it. The article suggests that the reason many startups rely on wrappers around OpenAI and similar platforms is due to these challenges.
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This article highlights a concerning issue that is not being widely discussed - there is currently a shortage of available power in the United States. The article mentions that major technology companies, known as FAANGS (Facebook, Apple, Amazon, Netflix, Google), have already secured contracts for power and physical space. Additionally, even if one were able to acquire a large number of GPUs (graphics processing units), deploying them for computation would be difficult as the required power and cooling infrastructure isn’t readily available. The article emphasizes that small-scale solutions, such as using chicken farms as data centers, are insufficient. Furthermore, the increasing demand for large-scale training necessitates at least 10MW of power, which cannot be distributed across multiple data centers due to the data having to be located in one place. The article ends on a somewhat pessimistic note, wishing the reader good luck with these challenges.