天文学家跟踪一颗垂死恒星长达 130 年
天文学家首次直接追踪一颗垂死恒星超过一个世纪的缓慢转变,这一发现不仅刷新了在行星状星云中观测恒星演化的时间纪录,甚至可能是迄今在所有恒星中所观测到的最长演化过程,其变化幅度亦十分显著。螺线图星云(Spirograph Planetary Nebula)IC 418 是最早被发现的行星状星云之一,同时也是最明亮、最美丽且易于研究的星云之一。早在 1893 年,天文学家便已开始观测其光谱。自被发现以来,IC 418便 持续受到观测,即使观测光谱的技术多次革新,从肉眼测量进展到底片、数字相机,直至今日常用的 CCD,对这一星云的观测从未间断。 IC 418自开始观测以来,其特征性的绿光已经比维多利亚时代天文学家研究时强了约 2.5 倍。这样的变化是由中央恒星温度升高所致。自 1893 年以来,它的温度已经上升约 3,000°C,大约每 40 年增加 1,000°C。作为对照,太阳在形成过程中也曾升高相同程度的温度,但花了整整1,000万年。行星状星云是恒星生命的最后阶段之一。当恒星核心变得不稳定时,会将外层物质抛向太空,留下的核心则会迅速升温,使周围的气体与尘埃被激发形成壮丽的结构。对 IC 418 而言,这些结构错综复杂、宛如漩涡图案,因此获得螺线图星云的昵称。 via Solidot
天文学家首次直接追踪一颗垂死恒星超过一个世纪的缓慢转变,这一发现不仅刷新了在行星状星云中观测恒星演化的时间纪录,甚至可能是迄今在所有恒星中所观测到的最长演化过程,其变化幅度亦十分显著。螺线图星云(Spirograph Planetary Nebula)IC 418 是最早被发现的行星状星云之一,同时也是最明亮、最美丽且易于研究的星云之一。早在 1893 年,天文学家便已开始观测其光谱。自被发现以来,IC 418便 持续受到观测,即使观测光谱的技术多次革新,从肉眼测量进展到底片、数字相机,直至今日常用的 CCD,对这一星云的观测从未间断。 IC 418自开始观测以来,其特征性的绿光已经比维多利亚时代天文学家研究时强了约 2.5 倍。这样的变化是由中央恒星温度升高所致。自 1893 年以来,它的温度已经上升约 3,000°C,大约每 40 年增加 1,000°C。作为对照,太阳在形成过程中也曾升高相同程度的温度,但花了整整1,000万年。行星状星云是恒星生命的最后阶段之一。当恒星核心变得不稳定时,会将外层物质抛向太空,留下的核心则会迅速升温,使周围的气体与尘埃被激发形成壮丽的结构。对 IC 418 而言,这些结构错综复杂、宛如漩涡图案,因此获得螺线图星云的昵称。 via Solidot
审稿人如果审的论文引用了其工作会更可能批准
根据对四家开放获取期刊出版物发表的 18,400 篇论文的分析,如果审稿人自己的论文在手稿后续修改版本中被引用,那么相比那些没有引用的手稿,它们更可能获得批准。研究作者 Adrian Barnett 在澳大利昆士兰科技大学从事同行评审和元研究(meta-research)研究,他表示研究灵感来自轶事传闻,据说作者因为审稿人的要求而在论文中添加新的引用。他认为少量引用是可以接受的,但如果要求引用的数量过多,或者引用理由不充分,那么审稿流程就变成交易型(transactional),引用会增加一名研究人员的 h-index。研究针对的四个开放获取平台——F1000Research、Wellcome Open Research、Gates Open Research 和 Open Research Europ——它们公开了论文的所有版本以及审稿人意见。每篇论文的手稿至少需要有两位审稿人发表评论意见。近 5000 篇论文引用了一位审稿人的论文,有 2300 篇审稿人意见要求引用审稿人的论文。 via Solidot
根据对四家开放获取期刊出版物发表的 18,400 篇论文的分析,如果审稿人自己的论文在手稿后续修改版本中被引用,那么相比那些没有引用的手稿,它们更可能获得批准。研究作者 Adrian Barnett 在澳大利昆士兰科技大学从事同行评审和元研究(meta-research)研究,他表示研究灵感来自轶事传闻,据说作者因为审稿人的要求而在论文中添加新的引用。他认为少量引用是可以接受的,但如果要求引用的数量过多,或者引用理由不充分,那么审稿流程就变成交易型(transactional),引用会增加一名研究人员的 h-index。研究针对的四个开放获取平台——F1000Research、Wellcome Open Research、Gates Open Research 和 Open Research Europ——它们公开了论文的所有版本以及审稿人意见。每篇论文的手稿至少需要有两位审稿人发表评论意见。近 5000 篇论文引用了一位审稿人的论文,有 2300 篇审稿人意见要求引用审稿人的论文。 via Solidot
Google 数据中心的用水量
密歇根州的研究人员调查了亚马逊、Google、微软、Meta、Digital Realty 和 Equinix 六大公司数据中心用水量。亚马逊每年会发布可持续发展报告,但报告没有披露数据中心的用水量,微软的情况类似,Google 和 Meta 的报告更详细。根据 Google 和 Meta 的报告,2023 年 Meta 全球用水量为 8.13 亿加仑,其中 95% 即 7.76 亿加仑用于数据中心;2023 年 Google 全球运营用水量为 64 亿加仑,其中 95% 即 61 亿加仑用于数据中心,2024 年 Google 位于爱荷华州 Council Bluffs 的数据中心用水量达到了 10 亿加仑,是其所有数据中心中用水量最高的,用水量最少的是 Google 位于德州 Pflugerville 的数据中心,用水量 1 万加仑,相当于德州一个家庭两个月的用水量,该数据中心采用风冷而非水冷。 via Solidot
密歇根州的研究人员调查了亚马逊、Google、微软、Meta、Digital Realty 和 Equinix 六大公司数据中心用水量。亚马逊每年会发布可持续发展报告,但报告没有披露数据中心的用水量,微软的情况类似,Google 和 Meta 的报告更详细。根据 Google 和 Meta 的报告,2023 年 Meta 全球用水量为 8.13 亿加仑,其中 95% 即 7.76 亿加仑用于数据中心;2023 年 Google 全球运营用水量为 64 亿加仑,其中 95% 即 61 亿加仑用于数据中心,2024 年 Google 位于爱荷华州 Council Bluffs 的数据中心用水量达到了 10 亿加仑,是其所有数据中心中用水量最高的,用水量最少的是 Google 位于德州 Pflugerville 的数据中心,用水量 1 万加仑,相当于德州一个家庭两个月的用水量,该数据中心采用风冷而非水冷。 via Solidot
FFmpeg 8.0 释出
开源多媒体编解码器项目 FFmpeg 正式释出了代号为 Huffman 的 v8.0 版本。新版本距离上个大版本的发布相距约 17 个月。主要新变化包括:为 RealVideo 6.0、ADPCM IMA Xbox、G.728、Sanyo LD-ADPCM 引入了新的原生解码器;为三星 Advanced Professional Video 引入了 APV 解码器;为 APV、动画 JPEG-XL 和 libx265 alpha 层编码功能引入了编码支持;OpenHarmony 的编码和解码支持;Video Acceleration API (VA-API)的 VVC/H.266 支持; AVX-512 优化、FFV1 改进、AV1 RTP 分组器/解包器、AMD AMF 解码器、Vulkan 视频增强、更好的 HDR 视频支持;新的过滤器如 colordetect、pad_cuda、scale_d3d11、Whisper 等等等。 via Solidot
开源多媒体编解码器项目 FFmpeg 正式释出了代号为 Huffman 的 v8.0 版本。新版本距离上个大版本的发布相距约 17 个月。主要新变化包括:为 RealVideo 6.0、ADPCM IMA Xbox、G.728、Sanyo LD-ADPCM 引入了新的原生解码器;为三星 Advanced Professional Video 引入了 APV 解码器;为 APV、动画 JPEG-XL 和 libx265 alpha 层编码功能引入了编码支持;OpenHarmony 的编码和解码支持;Video Acceleration API (VA-API)的 VVC/H.266 支持; AVX-512 优化、FFV1 改进、AV1 RTP 分组器/解包器、AMD AMF 解码器、Vulkan 视频增强、更好的 HDR 视频支持;新的过滤器如 colordetect、pad_cuda、scale_d3d11、Whisper 等等等。 via Solidot
Amid Service Disruption, Colt Telecom Confirms 'Criminal Group' Accessed Their Data, As Ransomware Gang Threatens to Sell It
August 23, 2025 at 10:34PM
August 23, 2025 at 10:34PM
it.slashdot.org
Amid Service Disruption, Colt Confirms 'Criminal Group' Accessed Their Data, As Ransomware Gang Threatens to Sell It
British telecommunications service provider Colt Telecom "has offices in over 30 countries across North America, Europe, and Asia, reports CPO magazine. "It manages nearly 1,000 data centers and roughly 75,000 km of fiber infrastructure." But now "a cyber…
Making Cash Off 'AI Slop': the Surreal Video Business Taking Over the Web
August 23, 2025 at 11:34PM
August 23, 2025 at 11:34PM
tech.slashdot.org
Making Cash Off 'AI Slop': the Surreal Video Business Taking Over the Web
The Washington Post looks at the rise of low-effort, high-volume "AI slop" videos: The major social media platforms, scared of driving viewers away, have tried to crack down on slop accounts, using AI tools of their own to detect and flag videos they believe…
Arch Linux Faces 'Ongoing' DDoS Attack
August 24, 2025 at 12:34AM
August 24, 2025 at 12:34AM
linux.slashdot.org
Arch Linux Faces 'Ongoing' DDoS Attack
"Some joyless ne'er-do-well has loosed a botnet on the community-driven Arch Linux distro," reports the Register, with a distributed denial of service (DDoS) attack that apparently started a week ago. Arch maintainer Cristian Heusel announced Thursday on…
Amid Service Disruption, Colt Confirms 'Criminal Group' Accessed Their Data, As Ransomware Gang Threatens to Sell It
August 23, 2025 at 10:34PM
August 23, 2025 at 10:34PM
it.slashdot.org
Amid Service Disruption, Colt Confirms 'Criminal Group' Accessed Their Data, As Ransomware Gang Threatens to Sell It
British telecommunications service provider Colt Telecom "has offices in over 30 countries across North America, Europe, and Asia, reports CPO magazine. "It manages nearly 1,000 data centers and roughly 75,000 km of fiber infrastructure." But now "a cyber…
FSF Announces Photo Contest Honoring 40 Years of Free Software
August 24, 2025 at 01:34AM
August 24, 2025 at 01:34AM
news.slashdot.org
FSF Announces Photo Contest Honoring 40 Years of Free Software
The Free Software Foundation announced a special photography contest honoring its 40th anniversary: The technology we use every day has changed dramatically since our founding nearly forty years ago, including the way we interact with it... We're incredibly…
Threads Has 400 Million Monthly Users. But Who Are They?
August 24, 2025 at 02:34AM
August 24, 2025 at 02:34AM
tech.slashdot.org
Threads Has 400 Million Monthly Users. But Who Are They?
Threads now has more than 400 million monthly active users. But who are these people who are actually using Threads, asks Mashable? And what is their cultural footprint? Threads is the Big Bang Theory of social media. Bland, boring, largely unoffensive, and…
James Cameron Struggles With Real-World Horrors for 'Terminator 7' and New Hiroshima Movie
August 24, 2025 at 03:34AM
August 24, 2025 at 03:34AM
entertainment.slashdot.org
James Cameron Struggles With Real-World Horrors for 'Terminator 7' and New Hiroshima Movie
"James Cameron has a confession: he can't write Terminator 7..." according to the Guardian, "because reality keeps nicking his plotlines." "I'm at a point right now where I have a hard time writing science-fiction," Cameron told CNN this week. "I'm tasked…
Nvidia Release Massive AI-Ready Open European Language Dataset and Tools
August 24, 2025 at 04:34AM
August 24, 2025 at 04:34AM
hardware.slashdot.org
Nvidia Release Massive AI-Ready Open European Language Dataset and Tools
"Only a tiny fraction of the more than 7,000 languages on Earth are supported by artificial intelligence models," reported SiliconANGLE this week. So Nvidia announced "a massive new AI-ready dataset and models to support the development of high-quality AI…
New Zealand Air Traffic Control Failure Likely Caused By Data Transfer Issue
August 24, 2025 at 05:34AM
August 24, 2025 at 05:34AM
tech.slashdot.org
New Zealand Air Traffic Control Failure Likely Caused By Data Transfer Issue
Last weekend New Zealand experienced an hour-long air traffic control failure that disrupted flights, leaving five plans circling and four others unable to take off, according to Radio New Zealand. The country's sole air traffic service provider, Airways…
Intel's New Funding Came From Already-Awarded Grants. So What Happens Next?
August 24, 2025 at 06:34AM
August 24, 2025 at 06:34AM
hardware.slashdot.org
Intel's New Funding Came From Already-Awarded Grants. So What Happens Next?
The U.S. government's 10% stake in Intel "is a mistake," writes the Washington Post's editorial board, calling Intel "an aging also-ran in critical markets" that "has spent recent years stumbling on execution and missing one strategic opportunity after another."…
Solar Energy Was America's Largest Source of New Energy for 21 Straight Months
August 24, 2025 at 09:34AM
August 24, 2025 at 09:34AM
news.slashdot.org
Solar Energy Was America's Largest Source of New Energy for 21 Straight Months
"Solar and wind accounted for almost 91% of new U.S. electrical generating capacity added in the first five months of 2025..." reports Electrek, citing new data from America's Federal Energy Regulatory Commission. "Solar has now been the largest source of…
Will Google's 'Battery Health Assistant' Throttle Your Pixel 10's Battery?
August 24, 2025 at 11:34AM
August 24, 2025 at 11:34AM
hardware.slashdot.org
Will Google's 'Battery Health Assistant' Throttle Your Pixel 10's Battery?
"Google has confirmed that its Battery Health Assistance feature can't be turned off on the Pixel 10 phones," reports Android Authority: Google introduced a Battery Health Assistance feature on the Pixel 9a earlier this year. This feature gradually drops…
YouTube's Sneaky AI 'Experiment': Is Social Media Embracing AI-Generated Content?
August 24, 2025 at 03:34PM
August 24, 2025 at 03:34PM
news.slashdot.org
YouTube's Sneaky AI 'Experiment': Is Social Media Embracing AI-Generated Content?
The Atlantic reports some YouTube users noticed their uploaded videos have since "been subtly augmented, their appearance changing without their creators doing anything..." "For creators who want to differentiate themselves from the new synthetic content…
FBI Warns Russian Hackers Targeted 'Thousands' of Critical US Infrastructure IT Systems
August 24, 2025 at 07:34PM
August 24, 2025 at 07:34PM
news.slashdot.org
FBI Warns Russian Hackers Targeted 'Thousands' of Critical US Infrastructure IT Systems
The Hill reports: Russian state-sponsored hackers have targeted thousands of networking devices associated with U.S. critical infrastructure sectors over the past year, the FBI warned Wednesday. The cyber actors are associated with the Russian Federal Security…