World3 Model Update: Resource Depletion Signals Imminent Global Collapse?

2025-05-30
World3 Model Update: Resource Depletion Signals Imminent Global Collapse?

A recent recalibration of the 'Limits to Growth' World3 model paints a stark picture. Even accounting for technological advancements, the study suggests resource depletion will lead to peaking and subsequent sharp declines in global industrial output and food production within the next decade. This aligns alarmingly with 1970s predictions, forecasting a potential drop in the global Human Development Index back to 1900 levels by the end of the century. The research highlights resource constraints, not pollution, as the primary driver of the impending systemic collapse, urging proactive responses to the coming era of 'degrowth'.

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Relational Quantum Mechanics: A Revolutionary Interpretation

2025-02-11

Relational Quantum Mechanics (RQM) offers a radical departure from traditional quantum interpretations. Instead of focusing on wave functions or quantum states, RQM centers on the values of physical variables, which are inherently relational and only actualized during interactions between systems. This challenges classical assumptions of absolute, always-defined variable values. RQM reinterprets quantum superposition, not as a 'half-alive, half-dead cat,' but as probability distributions influenced by interference effects. It differs from interpretations like Many-Worlds and Bohmian mechanics by emphasizing the relativity of all physical variables and avoiding the measurement problem. While RQM faces criticism, such as potential solipsism arising from its relative perspectives, it provides a novel and thought-provoking approach to understanding quantum mechanics.

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OpenAI Admits: AI Hallucinations Stem from Fundamental Training Flaws

2025-09-18
OpenAI Admits: AI Hallucinations Stem from Fundamental Training Flaws

OpenAI has published a paper revealing that the 'hallucinations' in its large language models aren't accidental; they're a consequence of fundamental flaws in the training methodology. Models are trained to prioritize guessing over admitting ignorance, as this yields higher scores in current evaluation systems. The paper uses the example of finding a researcher's birthday to demonstrate how the training mechanism leads to incorrect answers. OpenAI acknowledges that mainstream evaluation methods reward this 'hallucinatory' behavior and states it's improving training mechanisms, such as prompting models to more frequently respond with 'I don't know,' but completely resolving the issue remains a challenge.

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AI

arXivLabs: Community Collaboration on arXiv Feature Development

2025-08-26
arXivLabs: Community Collaboration on arXiv Feature Development

arXivLabs is a new collaborative framework enabling developers to build and share new arXiv features directly on the arXiv website. Individuals and organizations participating in arXivLabs embrace arXiv's values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners who share them. Got an idea for a project that will benefit the arXiv community? Learn more about arXivLabs!

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Development

Tackling High Memory Consumption When Parsing Large JSON Files with Pydantic

2025-05-22
Tackling High Memory Consumption When Parsing Large JSON Files with Pydantic

High memory consumption is a common problem when using Pydantic to process large JSON files. This article analyzes the reasons for high memory usage with Pydantic's default JSON loading and proposes two solutions: using the ijson library for incremental JSON parsing to reduce memory usage during parsing, and converting Pydantic models to dataclasses with `slots` to reduce object memory consumption. Experimental results show that combining these two methods can reduce memory usage to one-fourth of the original, effectively solving the memory bottleneck of processing large JSON files.

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SkyRoof: Ham Satellite Tracking and SDR Receiver Software

2025-06-05

VE3NEA recently released SkyRoof, a Windows program combining satellite tracking and SDR receiver functionalities. Supporting RTL-SDR, Airspy, and SDRplay, it tracks and receives ham radio satellites, offering real-time tracking, pass prediction, a sky map, and an SDR waterfall display. It demodulates SSB/CW/FM, automatically compensates for Doppler shift, and interfaces with hamlib-compatible antenna rotators. Johnson's Techworld on YouTube features a SkyRoof test video.

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Singularity Theorems Proven in Non-Smooth Spacetimes

2025-07-19
Singularity Theorems Proven in Non-Smooth Spacetimes

Mathematicians have long sought to prove singularity theorems in general relativity, such as Hawking's singularity theorem, but these theorems rely on the assumption of smooth spacetime. Recently, researchers cleverly used a 'triangle comparison method' and 'optimal transport theory' to prove special cases of these singularity theorems in non-smooth spacetimes, even extending to more general spacetime models. This breakthrough not only strengthens the mathematical foundation of the Big Bang singularity theory but also provides new mathematical tools for quantum gravity research, paving the way for unifying general relativity and quantum physics.

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Google's Android XR Smart Glasses: A Challenger to Apple and Meta

2025-05-25
Google's Android XR Smart Glasses: A Challenger to Apple and Meta

Google unveiled its Android XR smart glasses at I/O, featuring lightweight design, deep Gemini AI integration, and an optional in-lens display for information like turn-by-turn directions. Equipped with cameras, microphones, and speakers, they connect to smartphones for app access. Gemini AI uses the glasses' cameras to understand surroundings, providing translations and real-time information. Google plans collaborations with Warby Parker and Gentle Monster for stylish designs. This launch is seen as a challenge to Apple's upcoming smart glasses and Meta's Ray-Bans, intensifying the AR/VR market competition.

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Tech

GM Settles FTC Charges Over Secret Sharing of Driver Location Data

2025-01-17
GM Settles FTC Charges Over Secret Sharing of Driver Location Data

General Motors (GM) has settled with the FTC over privacy concerns related to its discontinued Smart Driver program. The FTC alleged that GM collected and shared precise geolocation data from millions of vehicles without informed consent, providing this data to insurance companies and impacting drivers' premiums. The settlement prohibits GM from sharing such data for five years and mandates obtaining affirmative consent for data collection, along with data access and deletion options for users. This case highlights the ongoing debate surrounding the privacy of automotive data and consumer protection.

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Tech

Breakthrough: Ambient RF Energy Harvesting Module Powers Small Electronics

2025-03-02
Breakthrough: Ambient RF Energy Harvesting Module Powers Small Electronics

Researchers from the National University of Singapore have developed a novel energy harvesting module capable of converting ambient radio frequency (RF) signals into direct current (DC) voltage, powering small electronics without batteries. This technology overcomes the low efficiency of existing rectifiers at low power levels, utilizing nanoscale spin-rectifiers for high sensitivity and compact design. Successfully powering a commercial temperature sensor, the module opens possibilities for IoT devices and wireless sensor networks in remote areas. Published in Nature Electronics, this research marks a significant advance in ambient energy harvesting.

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Internet Archive Settles Copyright Lawsuit Over Great 78 Project

2025-09-19
Internet Archive Settles Copyright Lawsuit Over Great 78 Project

The Internet Archive (IA) has reached a confidential settlement with major record labels, including UMG Recordings, Capitol Records, and Sony Music Entertainment, over a copyright lawsuit concerning the Great 78 Project. This project aimed to preserve early music recordings, but the labels initially sought $700 million in damages, claiming copyright infringement. While details remain undisclosed, the settlement averts potential financial ruin for IA.

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Tech

A Hacker's Guide to Practical C Programming

2025-04-14
A Hacker's Guide to Practical C Programming

This book, dedicated to Dennis Ritchie, offers a practical hacker's guide to the C programming language. The author, a seasoned hacker, shares practical techniques gleaned from years of experience, emphasizing C's power and flexibility. It champions the freedom C offers, arguing that choosing the right tool is the programmer's prerogative, not a matter of imposed preferences. The book includes code examples and discussions on using GNU extensions.

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Development Practical Guide

NOAA: The Unsung Hero Behind US Weather Forecasts

2025-02-11
NOAA: The Unsung Hero Behind US Weather Forecasts

Ever wonder how those effortless-looking weather forecasts come to be? The answer is NOAA (National Oceanic and Atmospheric Administration). NOAA uses a vast network of satellites, airplanes, radar, weather balloons, and buoys to gather real-time data, which is then processed by sophisticated computer models and experienced meteorologists to create accurate weather forecasts and warnings. This data is freely accessible to the public and widely used by various industries, from aviation to agriculture. NOAA's public nature and reliability make it irreplaceable.

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Tech

Massive NPM Package Supply Chain Attack: Millions of Downloads Compromised

2025-09-09
Massive NPM Package Supply Chain Attack: Millions of Downloads Compromised

A significant supply chain attack targeted the npm ecosystem, compromising multiple packages with over 2.6 billion weekly downloads. Attackers used phishing emails to gain access to a maintainer's account, subsequently injecting malware into several widely used packages. This malware intercepts cryptocurrency transactions in the browser, redirecting funds to attacker-controlled wallets. While some malicious versions have been removed by the NPM team, the incident highlights the vulnerabilities of software supply chains and the growing threat of phishing and browser-based attacks. The impact was mitigated somewhat as it only affected users with fresh installs during a narrow time window.

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Development

Preservation Project Completes: All 54 iPod Clickwheel Games Saved

2025-09-09
Preservation Project Completes: All 54 iPod Clickwheel Games Saved

A community project dedicated to preserving classic iPod clickwheel games has finally reached its goal after over a year of effort. By coordinating multiple iPod users' iTunes accounts, the project overcame Apple's FairPlay DRM and successfully collected and preserved all 54 official games. The project faced numerous technical challenges and setbacks, but the final piece, Real Soccer 2009, was eventually provided by a user, completing the archive.

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B-Trees: A Deep Dive into Database Optimization

2025-01-04
B-Trees: A Deep Dive into Database Optimization

This article delves into the practical application of B-trees, particularly their optimization strategies within databases. By comparing B-trees and binary search trees in disk storage, the author explains how the high fan-out of B-trees reduces the number of disk I/O operations, thereby enhancing database performance. The article details B-tree optimizations such as slotted pages, separator key truncation, overflow pages, and sibling pointers, and how these techniques improve data locality, space utilization, and query efficiency. Finally, the author points out that real-world B-tree applications are far more complex than theoretical models, requiring consideration of specific hardware and operating system constraints.

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Development B-tree

KVSplit: Differentiated KV Cache Quantization for Apple Silicon

2025-05-16
KVSplit: Differentiated KV Cache Quantization for Apple Silicon

KVSplit optimizes LLMs on Apple Silicon by applying different quantization precision to keys vs. values in the attention mechanism's KV cache. This allows for significant memory reduction (up to 72%) with minimal quality loss. The K8V4 configuration (8-bit keys, 4-bit values) offers the best balance, achieving a 59% memory reduction with only a 0.86% perplexity increase and faster inference. KVSplit includes an easy installer and a comprehensive benchmark suite to evaluate different configurations, enabling longer context windows and larger models on Apple devices.

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Development

Culture Wars: The New Fault Line in Politics

2025-05-13
Culture Wars: The New Fault Line in Politics

A new study by Gennaioli and Tabellini challenges the traditional class-based understanding of political polarization. They argue that political divisions are increasingly driven by cultural identities, not economic interests. People choose identities based on prevailing social conflicts; economic issues highlight class divisions, while cultural issues (immigration, morality) create opposing cultural groups. Political parties exploit this, investing in identity-based propaganda to amplify cultural stereotypes and radicalize positions. A survey of US citizens supports this, showing cultural identity, not economic status, dictates views on welfare, taxes, etc. The "China shock" provides empirical evidence, showing that in economically impacted areas, culturally conservative voters reduced support for redistribution and increased anti-immigration sentiment. This shift explains the rise of right-wing populism despite growing inequality. The left's focus solely on inequality ignores the powerful influence of cultural identity, leading to electoral losses.

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OpenAI's Computing Power Shift: From Microsoft to SoftBank-Backed Stargate

2025-02-21
OpenAI's Computing Power Shift: From Microsoft to SoftBank-Backed Stargate

OpenAI projects a significant shift in its computing power sources within the next five years. By 2030, it anticipates three-quarters of its data center capacity will come from Stargate, a project heavily funded by SoftBank, a recent investor. This marks a departure from its current reliance on Microsoft, its largest shareholder. While OpenAI will continue increasing spending on Microsoft's data centers in the near term, its overall costs are poised for dramatic growth. The company projects a $20 billion cash burn in 2027, significantly exceeding the reported $5 billion in 2024. By 2030, inference costs (running AI models) are expected to surpass training costs.

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Popcorn: Running Elixir in the Browser

2025-05-17

Popcorn is a novel library enabling the execution of Elixir code within web browsers. Leveraging the AtomVM runtime, it executes compiled Elixir code client-side, offering APIs for Elixir-JavaScript interaction, serialization, and communication, while ensuring browser responsiveness. Currently under development, with an unstable API, it showcases three live examples: a simple Elixir REPL, interactive tutorials, and a Game of Life implementation. Developers can start using Popcorn by adding it as a dependency in their `mix.exs` and setting up JS and Elixir WASM entry points. It connects JS and Elixir via message passing and allows direct JS execution from Elixir. The Elixir side uses the `Popcorn.Wasm` module, while the JS side uses the `Popcorn` class.

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Development

SignalGate Continues: 410GB of TeleMessage Data Dumped

2025-05-20
SignalGate Continues: 410GB of TeleMessage Data Dumped

Security researcher Micah Lee revealed a massive 410GB data breach from TeleMessage, an Israeli firm providing archiving services for encrypted messaging apps like Signal and WhatsApp. TeleMessage's software was used by US government officials, leading to the 'SignalGate' scandal. The leaked data includes sensitive information, such as plaintext messages and metadata, highlighting vulnerabilities in TeleMessage's products and the risks associated with government reliance on encrypted message archiving services. The release comes from Distributed Denial of Secrets.

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Tech

Bitcoin Hits All-Time High Above $118,000, Fueled by Tech Rally

2025-07-12
Bitcoin Hits All-Time High Above $118,000, Fueled by Tech Rally

Bitcoin surged to a new all-time high above $118,000, mirroring the strong performance of tech stocks like Nvidia. Analysts attribute the rally to sustained institutional investment, increased corporate bitcoin holdings (e.g., MicroStrategy, GameStop, Trump Media), and anticipation surrounding upcoming crypto regulation discussions during "Crypto Week." The correlation between Bitcoin and tech stocks, along with shifting regulatory expectations, are key factors driving the price increase.

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Tech

Microsoft's AI Gamble: Can Mustafa Suleyman Turn Things Around?

2025-04-25
Microsoft's AI Gamble: Can Mustafa Suleyman Turn Things Around?

Microsoft spent $650 million acquiring the core team of Inflection AI, hoping to leverage the expertise of its founder, Mustafa Suleyman, to boost its AI capabilities and particularly reverse the lackluster user growth of Copilot. However, Suleyman's arrival has not been smooth sailing. Internal team integration difficulties, strained relationships with OpenAI, and the vast disparity in user numbers between Copilot and ChatGPT all pose challenges for Microsoft. The article explores Microsoft's strategic dilemmas in the AI field and whether Suleyman can ultimately deliver a successful consumer AI product.

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Tech

Kraken Foils North Korean Hacker's Job Application Infiltration Attempt

2025-05-01
Kraken Foils North Korean Hacker's Job Application Infiltration Attempt

Cryptocurrency exchange Kraken thwarted a North Korean hacker's attempt to infiltrate the company by applying for an engineering position. The hacker exhibited several red flags during the interview process, including using a false name, switching voices, and an email address linked to a known hacking group. Kraken's security team used open-source intelligence and multiple rounds of technical tests to ultimately expose the hacker's true identity. The incident highlights the importance of enhanced security measures for companies, particularly vigilance against hackers disguised as job applicants.

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The Fight for Free Tax Software in the US: Why Direct File Isn't Enough

2025-04-13

US taxpayers have long relied on proprietary tax software like TurboTax, compromising their freedom. While the IRS offers Direct File, a free e-filing service, it's not free software, lacking transparency, security, and repairability. The article urges the IRS to make Direct File free software to protect taxpayer rights, ensure data security, and enhance the system's sustainability and inclusivity. It encourages writing to the IRS Commissioner to advocate for change.

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The $25,000 Car is Going Extinct

2025-06-30

Affordable new cars under $25,000 are becoming increasingly rare. Automakers are prioritizing higher-profit, more expensive vehicles because many fixed costs (engineering, design, marketing, emissions standards) are similar across the entire model range. While budget-friendly models like the Ford Maverick initially saw huge popularity, their low profit margins led to price hikes and ultimately, the phasing out of many similar models. The remaining affordable options have seen significant price increases due to low supply. Consumer demand for higher trim levels and features also contributes to this trend. Though recent economic uncertainty shifted some consumer preference back to more affordable models, the era of the bargain car is largely over, with almost every new car now considered a luxury purchase.

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Body Doubling: A Productivity Hack for Focus and Task Completion

2025-03-29

Body doubling is a productivity technique gaining popularity, especially among those with ADHD. It involves working alongside another person, either physically or virtually, to improve focus and task completion. The presence of the 'body double' acts as an external motivator, reducing distractions and fostering a sense of accountability. While long-term studies are limited, anecdotal evidence and expert opinions suggest its effectiveness as a complementary approach to medication and helpful for individuals with other conditions like autism or anxiety.

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Development

Wireless Power Across the Room: A Year with Wi-Charge

2025-05-20
Wireless Power Across the Room: A Year with Wi-Charge

The author's frustration with constantly dying batteries in their smart home led them to test Wi-Charge's long-range wireless power technology. A ceiling-mounted transmitter uses infrared lasers to power a specially modified smart lock, eliminating the need for battery changes for a year. While the initial setup cost $1,250 and required professional installation, the convenience of cordless operation and no battery replacements was significant. However, widespread adoption faces hurdles: devices require special receivers, and the system's limited range requires multiple transmitters for whole-home coverage. The author concludes that while the technology works impressively, its high cost and infrastructure requirements remain significant barriers to broader home adoption, although it shows strong potential for commercial applications.

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Multiple Invention: It's Way More Common Than You Think

2025-06-05
Multiple Invention: It's Way More Common Than You Think

A study of 190 major inventions between 1800 and 1970 reveals that multiple invention—where the same invention is independently created by multiple individuals—is surprisingly common. Over half of the inventions examined involved multiple attempts, and nearly 40% had multiple successful or near-successful versions. This suggests that many inventions weren't unique strokes of genius, but rather stemmed from a confluence of readily available technologies, materials, and capabilities, combined with a shared focus on significant problems. This challenges the 'Great Man' theory of invention, suggesting that technological progress is more a product of broad historical forces.

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