Forwarded from Hacker News (yahnc_bot)
Superconductor news: What’s claimed, and how strong the evidence seems to be https://www.science.org/content/blog-post/breaking-superconductor-news
Science
Breaking Superconductor News
I wrote recently about the turmoil in the field of higher-temperature superconductors, but little did I know what was coming. Yesterday two preprints appeared on the rXiv site, the first bearing the attention-getting noscript “The First Room-Temperature Ambient…
Forwarded from 每日消费电子观察 (Kexy Biscuit | 被子饼️ | 百合ヶ咲るる)
日本游戏公司，株式会社 VISUAL ARTS，宣布社长马场隆博隐退，此后担任顾问职务，由天云玄树（丘野塔也）接任社长职务。
同时，将公司出售给腾讯，未来株式会社 VISUAL ARTS 将作为腾讯子公司存在。
https://weibo.com/7311364778/NbOk7xnDW
同时，将公司出售给腾讯，未来株式会社 VISUAL ARTS 将作为腾讯子公司存在。
https://weibo.com/7311364778/NbOk7xnDW
Forwarded from Hacker News (yahnc_bot)
Faster filesystem access with Directfs https://gvisor.dev/blog/2023/06/27/directfs/
gvisor.dev
Faster filesystem access with Directfs
Forwarded from Hacker News (yahnc_bot)
How to check if two SQL tables are the same https://github.com/remysucre/blog/blob/main/posts/sql-eq.md
GitHub
blog/posts/sql-eq.md at main · remysucre/blog
Contribute to remysucre/blog development by creating an account on GitHub.
Forwarded from Hacker News (yahnc_bot)
Implementing Fast Barriers for a Shared-Memory Cluster of 1024 RISC-V Cores https://semiengineering.com/implementing-fast-barriers-for-a-shared-memory-cluster-of-1024-risc-v-cores/
Semiconductor Engineering
Implementing Fast Barriers For A Shared-Memory Cluster Of 1024 RISC-V Cores
A technical paper noscriptd “Fast Shared-Memory Barrier Synchronization for a 1024-Cores RISC-V Many-Core Cluster” was published by researchers at ETH Zürich and Università di Bologna. “Synchronization is likely the most critical performance killer in shared…
Forwarded from Hacker News (yahnc_bot)
Nvidia DGX GH200 Whitepaper https://resources.nvidia.com/en-us-dgx-gh200/technical-white-paper
NVIDIA
World Leader in Artificial Intelligence Computing
NVIDIA invents the GPU, creates the largest gaming platform, powers the world’s fastest supercomputer, and drives advances in AI, HPC, gaming, creative design, autonomous vehicles, and robotics.
Forwarded from &'a ::rynco::UnnoscriptdChannel (Rynco Maekawa)
北航发布了 LK-99 的验证论文
https://arxiv.org/abs/2307.16802
铅铜磷酸盐Pb10-xCux(PO4)6O的半导体输运性质，由Pb2SO5和Cu3P烧结而成
最近关于改性铅磷灰石在常压常温下超导性的宣称立即引起整个社会的轰动关注，该超导材料由黄铅矿(Pb2SO5)和磷化亚铜(Cu3P)烧结而成。为了验证这一令人兴奋的宣称，我们成功合成了Pb2SO5、Cu3P，并最终制备了改性铅铜磷酸盐Pb10-xCux(PO4)6O。我们对这些化合物的电输运性质和磁性进行了系统分析。结果表明，Pb2SO5是一种高阻绝缘体，其室温电阻率约为7.18x10^9，而Cu3P是一种顺磁金属，其室温电阻率约为5.22x10^-4。与宣称的超导性相反，由Pb2SO5和Cu3P烧结而成的Pb10-xCux(PO4)6O化合物表现出类似半导体的输运特性，其室温电阻率较大，约为1.94x10^4，尽管我们的化合物的X射线衍射谱与先前报道的结构数据非常一致。此外，在室温下，将Pb10-xCux(PO4)6O压制成的颗粒放置在商用Nd2Fe14B磁体上，我们没有感觉到任何斥力，也没有观察到磁悬浮现象。这些结果表明，有关改性铅磷灰石常温超导体的宣称可能需要更仔细地重新检查，特别是其电输运性质。
https://arxiv.org/abs/2307.16802
铅铜磷酸盐Pb10-xCux(PO4)6O的半导体输运性质，由Pb2SO5和Cu3P烧结而成
最近关于改性铅磷灰石在常压常温下超导性的宣称立即引起整个社会的轰动关注，该超导材料由黄铅矿(Pb2SO5)和磷化亚铜(Cu3P)烧结而成。为了验证这一令人兴奋的宣称，我们成功合成了Pb2SO5、Cu3P，并最终制备了改性铅铜磷酸盐Pb10-xCux(PO4)6O。我们对这些化合物的电输运性质和磁性进行了系统分析。结果表明，Pb2SO5是一种高阻绝缘体，其室温电阻率约为7.18x10^9，而Cu3P是一种顺磁金属，其室温电阻率约为5.22x10^-4。与宣称的超导性相反，由Pb2SO5和Cu3P烧结而成的Pb10-xCux(PO4)6O化合物表现出类似半导体的输运特性，其室温电阻率较大，约为1.94x10^4，尽管我们的化合物的X射线衍射谱与先前报道的结构数据非常一致。此外，在室温下，将Pb10-xCux(PO4)6O压制成的颗粒放置在商用Nd2Fe14B磁体上，我们没有感觉到任何斥力，也没有观察到磁悬浮现象。这些结果表明，有关改性铅磷灰石常温超导体的宣称可能需要更仔细地重新检查，特别是其电输运性质。
👍5
https://vxtwitter.com/unormal/status/1686240264489144320
Pattern recognition(
Pattern recognition(
vxTwitter
🐔 Brian Bucklew 🐔 ₑͤ＞∿＜ₑͤ ∞🌮 (@unormal)
look every time civilization has a big advance, like plumbing or gasoline, we all get lead poisioning so i think that's a big vote in the favor of this new superconductor
💖 540
💖 540