HN Summary

[Media] Designer cells 'reboot'

Wed, 19 Feb 2025 16:43:26 +0300

Designer cells 'reboot' immune system in 3 different autoimmune diseases
In an early-stage clinical trial, scientists explored the potential of designer immune cells to "reboot" the immune systems of patients with autoimmune diseases using a form of CAR T cell therapy, traditionally used for blood cancers like leukemia. This innovative approach involved a single infusion of genetically modified T cells to eliminate rogue B cells responsible for autoimmune responses. Remarkably, within three months, patients' B cells were replenished and appeared healthy, akin to hitting a "reset button." Although the trial was small and short, initial results showed promising normalization of disease markers, and patients remained off traditional treatments for up to 11 months. If successful in larger trials, this could revolutionize autoimmune disease treatment. Notably, the trial did not encounter severe cytokine release syndrome, a common concern with CAR T therapy. However, the findings are yet to be peer-reviewed, and the long-term efficacy remains to be seen.

[Media] How human brains got so big: cells learned to handle stress that comes with sizeIn thi [...]

Fri, 19 Sep 2025 12:07:05 +0300

How human brains got so big: cells learned to handle stress that comes with size
In this intriguing exploration of human brain evolution, researchers have uncovered how our disproportionately large brains manage the stress associated with their size. By studying dopamine-producing neurons in humans and comparing them with those in other primates, scientists found that human neurons express more genes that enhance antioxidant activity, helping to mitigate cell damage. This discovery, though not yet peer-reviewed, could pave the way for new treatments for neurodegenerative diseases like Parkinson’s. The study highlights the unique genetic adaptations that allow human neurons to handle oxidative stress, potentially offering insights into developing therapies to boost cellular defenses. However, the research is still in its early stages, focusing on developing neurons rather than mature ones, which could limit its immediate applicability to adult neurodegenerative conditions.

[Media] Enormous cache of rare earth elements hidden inside coal ash wasteRecent research from [...]

Wed, 20 Nov 2024 04:29:05 +0300

Enormous cache of rare earth elements hidden inside coal ash waste
Recent research from The University of Texas at Austin reveals that coal ash, a byproduct of burned coal, contains significant quantities of rare earth elements (REEs), potentially bolstering the U.S. supply without new mining. This "trash to treasure" approach could reduce environmental impacts while addressing the U.S.'s reliance on REE imports, primarily from China. The study estimates 11 million tons of REEs in U.S. coal ash, valued at $8.4 billion. Although REE levels in coal ash are lower than in geological deposits, the vast quantities make it an attractive resource. The study's methodology is being adopted by the U.S. Department of Energy for a national assessment. A notable challenge is developing the workforce and operations for extraction. This research lays the groundwork for a broader market for coal ash as a resource, highlighting a clever and sustainable approach to resource recovery.

Why Smart C Coders Love LuaEmbedded systems have traditionally relied on C and C++ for their p [...]

Wed, 20 Nov 2024 04:28:57 +0300

Why Smart C Coders Love Lua
Embedded systems have traditionally relied on C and C++ for their performance and control. However, with the rise of IoT and edge devices, developers are increasingly turning to Lua, especially when paired with frameworks like Xedge. Lua offers a higher-level approach, simplifying development and reducing time-to-market. Unlike C, Lua is garbage-collected, easing memory management and minimizing errors. Its simplicity and readability make it accessible to a broader range of developers, enhancing team collaboration. Xedge further supports rapid development with pre-built modules, allowing developers to focus on high-level logic rather than low-level details. This hybrid approach leverages C for performance-critical tasks while using Lua for flexibility and rapid iteration, making it a compelling alternative for modern embedded projects. The surprising element is Lua's ability to integrate seamlessly with C, offering a balance between performance and development efficiency, which is particularly beneficial in the fast-paced IoT landscape.

[Media] PaCMAP: Large-Scale Dimension Reduction with Both Global and Local Structure [pdf](htt [...]

Wed, 20 Nov 2024 04:27:53 +0300

PaCMAP: Large-Scale Dimension Reduction with Both Global and Local Structure [pdf](https://news.ycombinator.com/item?id=42189253)
In this paper, we explore the intricacies of dimension reduction (DR) techniques like t-SNE, UMAP, and TriMap, which are pivotal for data visualization. These methods often face a trade-off between preserving global and local structures. Our research aims to understand the critical aspects of DR methods that allow for the preservation of both structures. We introduce PaCMAP, a novel algorithm that addresses this challenge by maintaining both local and global structures. Our findings reveal unexpected insights into the design choices that impact DR algorithms, emphasizing the importance of loss functions and graph components. Notably, PaCMAP dynamically adjusts parameters to achieve superior performance, offering a unified approach to structure preservation. This work provides a fresh perspective on DR methods, highlighting the complexities and potential improvements in data visualization techniques. (Summary based on 8% of story text.)

[Media] Joining the Shopify Board of DirectorsIn joining Shopify's Board of Directors, I [...]

Wed, 20 Nov 2024 04:25:43 +0300

Joining the Shopify Board of Directors
In joining Shopify's Board of Directors, I am thrilled to engage with the monumental scale and impact of Shopify's operations. Tobi has built a remarkable technical organization, employing a third of the Rails Core Team and contributing significantly to the Ruby on Rails community. My decision to join was not only driven by gratitude but also by a desire to tackle programming challenges at a scale far beyond my experience at 37signals. Shopify's ability to empower individual entrepreneurs against giants like Amazon is impressive, offering faster, more reliable shopping experiences. It's exciting to contribute to this mission, especially as Shopify continues to support diverse businesses, like those in the mechanical keyboard niche. The opportunity to help level the commercial playing field is truly a privilege. Thanks, Tobi!

[Media] Elasticsearch Was Great, but Vector Databases Are the FutureThe article from The New S [...]

Wed, 20 Nov 2024 04:25:39 +0300

Elasticsearch Was Great, but Vector Databases Are the Future
The article from The New Stack argues that while Elasticsearch has been a staple for keyword-based search, the future lies in vector databases, which excel in semantic search. As AI advances, semantic search, which understands the meaning behind queries, is becoming crucial. Vector databases, like Milvus, offer a hybrid approach by combining semantic and keyword search, addressing the limitations of traditional systems like Elasticsearch. The article highlights the operational complexity of managing separate systems and advocates for a unified solution that reduces infrastructure maintenance and enhances performance. The surprising revelation is the significant performance gap between Elasticsearch and vector databases, with Milvus outperforming Elasticsearch by over 30 times in certain metrics. This shift towards vector databases is seen as a transformative step for advanced search needs.

Ask HN: Bluesky Accounts Worth Following for HN EnthusiastsHey fellow HN enthusiasts!

Wed, 20 Nov 2024 04:24:36 +0300

Ask HN: Bluesky Accounts Worth Following for HN Enthusiasts
Hey fellow HN enthusiasts! I'm on the hunt for Bluesky accounts that echo the tech-centric discussions we cherish on Hacker News. If you know of any profiles that consistently share intriguing and insightful tech content, I'd love your recommendations. Let's curate a feed that keeps us informed and inspired, much like our beloved HN community.

[Media] Microsoft built a PC that can't run local apps – Windows 365 Link starts at $349M [...]

Wed, 20 Nov 2024 03:54:23 +0300

Microsoft built a PC that can't run local apps – Windows 365 Link starts at $349
Microsoft has unveiled the Windows 365 Link, a mini-PC designed to operate Windows 365 Cloud PCs, starting at $349. Aimed at businesses, this device requires a separate Windows 365 subscription, costing between $28 to $315 monthly per user. The most popular option, at $66 per month, totals nearly $2,000 over two years, including hardware costs. This price point is controversial, as a Microsoft Surface Laptop with similar specs is cheaper. The device features multiple ports, supports two 4K monitors, and offers enhanced security by preventing local app installations. While beneficial for enterprises with rotating staff, it’s impractical for individual users. The Windows 365 Link will be available in April 2025, with a preview program open in select countries.

[Media] Reexamination of 1975 "Edmund Fitzgerald"

Wed, 20 Nov 2024 03:50:16 +0300

Reexamination of 1975 "Edmund Fitzgerald" Storm Using Today's Technology [pdf](https://news.ycombinator.com/item?id=42102308)
In "Reexamination of the 1975 'Edmund Fitzgerald' Storm Using Today's Technology," authors Thomas R. Hultquist, Michael R. Dutter, and David J. Schwab revisit the infamous storm that led to the sinking of the Edmund Fitzgerald on Lake Superior. Utilizing modern numerical weather prediction models, they provide detailed hindcasts of the storm's conditions, revealing that the most severe weather occurred during a critical six-hour window on November 10, 1975. The study highlights the treacherous nature of Great Lakes storms, noting that steep, short-period waves can be particularly hazardous to large ships. While the article does not delve into the specific causes of the ship's sinking, it underscores the role of atmospheric stability in wave formation. The authors also contextualize the storm within the broader history of November gales on the Great Lakes, emphasizing the importance of improved forecasting in preventing maritime disasters. The piece is a testament to the power of modern technology in enhancing our understanding of historical weather events. (Summary based on 25% of story text.)