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Making Apple Watch Work with Android: An Open-Source Odyssey

2024-12-18
Making Apple Watch Work with Android: An Open-Source Odyssey

The author details their journey to connect an Apple Watch to an Android phone, bypassing Apple's walled garden. This involved using open-source apps, interoperable protocols, and third-party services, even requiring a secondary, home-based iPhone for initial setup. The author overcame challenges with notifications, calendar syncing, and contact integration, sharing their code on GitHub. This project highlights the power of open-source and the author's commitment to tech freedom, offering a compelling counterpoint to the closed ecosystems of tech giants.

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(abishekmuthian.com)
Tech

Through-the-Earth Communication: Revolutionizing Underground Connectivity

2024-12-14

Traditional radio waves struggle to penetrate rock, making communication in mines and caves challenging. This article explores Through-the-Earth (TTE) communication, utilizing ultra-low frequency (300-3000 Hz) signals that propagate through rock strata. TTE systems, including portable magnetic-loop cave radios, Personal Emergency Devices (PEDs), and the innovative 'Miner Lifeline' technology, are highlighted for their crucial role in mine rescue operations and cave exploration, even after catastrophic events like fires or explosions.

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(en.wikipedia.org)
Tech Through-the-Earth Communication Mine Communication Emergency Rescue

Hertz Desperate to Offload Tesla Inventory, Offers Deep Discounts

2024-12-25
Hertz Desperate to Offload Tesla Inventory, Offers Deep Discounts

Rental car giant Hertz is aggressively selling off its Tesla Model 3 inventory at drastically reduced prices. A Hertz customer posted on Reddit a screenshot showing a 2023 Model 3 with 30,000 miles for just $17,913 – significantly below market value. While buying used rental cars carries risks, the low price and remaining battery warranty are tempting many. Hertz's move is likely a response to high depreciation on its large Tesla fleet and a push to clear inventory before year-end.

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(jalopnik.com)
Tech Tesla Hertz Used Cars

Unexpected Keyboard: A Lightweight Virtual Keyboard for Android

2024-12-12
Unexpected Keyboard: A Lightweight Virtual Keyboard for Android

Unexpected Keyboard is a lightweight Android virtual keyboard designed for developers. Its key feature is the ability to input more characters by swiping towards the corners of keys. Originally designed for Termux users, it's now suitable for everyday use. The app is ad-free, makes no network requests, and is open-source. Users can access special symbols by swiping to the corners of keys; for example, swiping to the bottom-left corner opens settings. Similar apps include Calculator++.

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(github.com)
Development android keyboard virtual keyboard

Mystery Drone Sightings Continue to Plague US East Coast

2024-12-18
Mystery Drone Sightings Continue to Plague US East Coast

A wave of mysterious drone sightings is causing widespread concern and airspace closures along the US East Coast. These SUV-sized drones have been reported near military bases and airports in New Jersey and New York, disrupting air travel. While federal agencies are investigating, explanations remain elusive, with speculation ranging from political conspiracies to other unknown causes. The ongoing mystery fuels public anxiety and calls for swift resolution to prevent further disruptions and potential threats.

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(www.theregister.com)
Misc drones US East Coast airspace closures

UK's Illegal Cybertruck Faces Uphill Battle for Legalization

2024-12-15
UK's Illegal Cybertruck Faces Uphill Battle for Legalization

Yianni Charalambous, a UK car customizer, is attempting to register a Tesla Cybertruck for road use in the UK, following a similar success in the Czech Republic. However, the Cybertruck's sharp design clashes with UK and EU pedestrian safety regulations, posing significant challenges. Its unique steer-by-wire system, reliance on OTA updates unavailable in the UK, and incompatibility with EU recall systems further complicate matters. Experts deem its chances of passing the UK's IVA test extremely slim.

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(www.wired.com)
Tech Tesla Cybertruck Car Modification Safety Regulations

The Essence of Computing Science: Elegance over Complexity

2024-12-24

This essay by Edsger W. Dijkstra explores the nature of computing science. Dijkstra argues that computing science should be a highly formalized branch of mathematics, emphasizing methodology over factual knowledge, thus bridging the gap between theory and practice. He criticizes the current academic world's pursuit of complexity and the resulting neglect of simple and effective solutions, and calls on computer scientists to pursue elegant solutions and find joy in the process.

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(www.cs.utexas.edu)
Development computer science algorithms methodology

Website Showcases Early Christian Writings

2024-12-25

A new website, "Early Christian Writings," offers a comprehensive collection of Christian texts predating the Council of Nicaea in 325 AD. It features the New Testament, Apocrypha, Gnostic texts, writings of the Church Fathers, and related non-Christian sources, all with translations and commentary. This resource provides invaluable insight into the history and development of early Christianity.

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(www.earlychristianwritings.com)
Misc Early Christianity Texts History

Lightweight Safety Classification Using Pruned Language Models

2024-12-19
Lightweight Safety Classification Using Pruned Language Models

Researchers introduce Layer Enhanced Classification (LEC), a novel lightweight technique for content safety and prompt injection classification in Large Language Models (LLMs). LEC trains a streamlined Penalized Logistic Regression (PLR) classifier on the hidden state of an LLM's optimal intermediate transformer layer. Combining the efficiency of PLR with the sophisticated language understanding of LLMs, LEC outperforms GPT-4o and specialized models. Small general-purpose models like Qwen 2.5 and architectures such as DeBERTa v3 prove robust feature extractors, effectively training with fewer than 100 high-quality examples. Crucially, intermediate transformer layers often outperform the final layer. A single general-purpose LLM can classify content safety, detect prompt injections, and generate output, or smaller LLMs can be pruned to their optimal intermediate layer for feature extraction. Consistent results across architectures suggest robust feature extraction is inherent to many LLMs.

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(arxiv.org)
AI Safety Classification Feature Extraction

Grug's Guide to Sound: A Caveman's Approach to High Fidelity

2024-12-17
Grug's Guide to Sound: A Caveman's Approach to High Fidelity

Grug, a seasoned (though slightly confused) sound engineer, penned this guide to help young Grugs build the perfect cave sound system. The guide covers every component in the signal chain, from streamers to speakers, explaining key parameters like impedance, sensitivity, and distortion. Grug emphasizes low noise and low distortion, advising prioritization of high-quality speakers. Ultimately, Grug recommends a budget-friendly entry-level system, allowing young Grugs to enjoy high-fidelity music in their caves.

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(petrustheron.com)
Misc audio hi-fi

CCState: A Lightweight and Flexible State Management Library

2024-12-19
CCState: A Lightweight and Flexible State Management Library

CCState is a lightweight, semantically clear, and flexible state management library designed for medium to large single-page applications with complex state management needs. It's built on three basic data types: computed, command, and state, offering a simple and intuitive API with 100% test coverage. Framework-agnostic, CCState works seamlessly with React, Vanilla JS, and other UI frameworks, boasting blazing-fast performance, outperforming Jotai in various scenarios. The core APIs – `state`, `computed`, and `command` – handle basic value units, derived computations, and side effects respectively. React Hooks like `useGet`, `useSet`, `useLoadable`, and `useResolved` simplify data access and Promise handling. CCState also offers subscription capabilities for reactive updates.

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(github.com)
Development state management JavaScript library

The Walmart Effect: A Hidden Cost of Low Prices

2024-12-24
The Walmart Effect: A Hidden Cost of Low Prices

Walmart, known for its low prices, has long been considered a boon for lower- and middle-income families. However, two new research papers challenge this view. The studies find that while Walmart lowers consumer prices, it also leads to decreased income and increased unemployment in communities, with the negative effects outweighing consumer savings. This is attributed to Walmart undercutting local competitors, reducing jobs, and leveraging its monopsony power to suppress wages for both suppliers and employees. This raises questions about the "consumer welfare standard," which prioritizes low prices as a measure of economic health. The research suggests that a singular focus on low prices can lead to long-term economic harm, prompting a reevaluation of policy priorities.

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(www.theatlantic.com)
Startup economic impact consumer welfare

Immutable Linux Distros: Are They Right for You?

2024-12-25
Immutable Linux Distros: Are They Right for You?

This article explores immutable Linux distributions, which enhance stability and security by locking down the core system as read-only. It explains the concept, advantages, and selection criteria for immutable distros, recommending several desktop and server options like Fedora Silverblue, Vanilla OS, and openSUSE Aeon. The author shares personal experiences and discusses the differences between immutable distros and traditional ones, along with snapshot tools like Timeshift and Btrfs. In essence, immutable Linux distros offer a compelling alternative for users prioritizing stability and security, trading some flexibility for a more maintenance-free experience.

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(linuxblog.io)
Development Linux distributions immutable systems system stability

Intel Core Ultra 9 285K "Arrow Lake": Windows 11 vs. Ubuntu Linux Performance Showdown

2024-12-20

Phoronix conducted a comprehensive benchmark comparing the performance of Intel's flagship Core Ultra 9 285K "Arrow Lake" processor on Windows 11 and Ubuntu Linux. Testing included various Linux kernel versions and power management settings. Results showed Linux sometimes edging out Windows in performance, thanks to Linux's flexibility and optimizations for newer kernels. The benchmarks highlight the impact of OS choice on processor performance, offering valuable insights for users choosing an operating system.

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(www.phoronix.com)
Hardware processor performance OS comparison

Rust-based SQLite Rewrite Achieves 100x Tail Latency Reduction

2024-12-16

Researchers from the University of Helsinki and Cambridge have rewritten SQLite in Rust, creating Limbo, a project leveraging asynchronous I/O and io_uring to drastically improve performance. By utilizing asynchronous I/O and storage disaggregation, Limbo achieves up to a 100x reduction in tail latency, particularly beneficial in multi-tenant serverless environments. The key improvement comes from replacing synchronous bytecode instructions with asynchronous counterparts, eliminating blocking and enhancing concurrency. While improvements are most pronounced at high percentiles, this makes Limbo ideal for applications demanding high reliability.

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(avi.im)
Development Asynchronous I/O

Sensirion SGP41 TVOC Sensor Accuracy Test: Relative Changes, Not Absolute Values

2024-12-15
Sensirion SGP41 TVOC Sensor Accuracy Test: Relative Changes, Not Absolute Values

AirGradient conducted accuracy and precision tests on the Sensirion SGP41 TVOC sensor used in their air quality monitors. The tests revealed that the sensor effectively tracks relative changes in TVOC levels – detecting increases or decreases – but cannot provide precise absolute values. This is due to limitations inherent in low-cost VOC sensors, including lack of specificity, cross-sensitivity, environmental sensitivity, and baseline drift. While the sensor cannot precisely measure TVOC concentrations, it still offers practical value in identifying TVOC sources and for environmental monitoring. Future testing by AirGradient will explore sensor performance under various conditions to further understand its capabilities and limitations.

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(www.airgradient.com)
Hardware TVOC sensor air quality monitoring sensor accuracy

Quick Start with TideCloak: Secure React App in 10 Minutes

2024-12-19
Quick Start with TideCloak: Secure React App in 10 Minutes

TideCloak is an easy-to-use identity and access management system based on Keycloak and secured by Tide's Cybersecurity Fabric. This guide shows you how to build a secure single-page React application with TideCloak in under 10 minutes. First, install Docker and NPM, then run the TideCloak-Dev Docker container. After activating a free developer license, create your React project, install dependencies, and run the application. Users can log in, register, and view customized content based on predefined roles, all managed by TideCloak and secured by Tide's Cybersecurity Fabric.

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(github.com)
Development Identity Management

Visualizing 6D Mesh Parallelism in Deep Learning Training

2024-12-19
Visualizing 6D Mesh Parallelism in Deep Learning Training

This article delves into the complexities of 6D mesh parallelism in deep learning model training. Using a series of visualizations, the author meticulously explains the communication mechanisms of various parallel strategies—data parallelism, fully sharded data parallelism, tensor parallelism, context parallelism, expert parallelism, and pipeline parallelism—during the model's forward and backward passes. The author uses a simple attention layer model to illustrate the implementation details of each parallel approach, highlighting their interactions and potential challenges, such as the conflict between pipeline parallelism and fully sharded data parallelism. The article concludes by discussing mesh ordering, combining different parallel strategies, and practical considerations.

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(main-horse.github.io)
AI parallel computing model training

Grayjay App: Follow Creators, Not Platforms

2024-12-20

Grayjay is a multi-platform video player that aggregates content from YouTube, PeerTube, Twitch, and more, eliminating the need to switch between different platforms. Prioritizing user privacy, it stores watch history locally and offers data import/export and auto-backup. Features include a personalized content feed, screen casting, and Harbor integration for connecting with audiences and monetizing content.

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(grayjay.app)
Development video player cross-platform

Nottingham Scientists Discover New Type of Magnetism with Potential to Revolutionize Digital Devices

2024-12-16

Researchers at the University of Nottingham have discovered a new class of magnetism called 'altermagnetism,' where magnetic building blocks align antiparallel but with a rotated structure. Published in Nature, this finding could revolutionize digital devices. Altermagnets promise a thousand-fold increase in the speed of microelectronic components and digital memory, while offering improved robustness and energy efficiency, and reducing reliance on rare and toxic heavy elements. The team used X-ray imaging at the MAX IV facility in Sweden to confirm the existence and controllability of this new magnetic order.

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(www.nottingham.ac.uk)
Tech new magnetism digital devices microelectronics

Pink Floyd's 'The Wall': A Descent into Isolation and the Search for Meaning

2024-12-12

Pink Floyd's 'The Wall' is a groundbreaking concept album chronicling the fictional Pink's journey from childhood trauma to self-imposed isolation. Haunted by the loss of his father in World War II, a domineering mother, and the crushing weight of fame, Pink constructs a metaphorical wall to shield himself from emotional pain. This wall, built brick by brick through life's hardships, leads him to the brink of insanity. Yet, the narrative explores themes of freedom and responsibility, culminating in a theatrical mental trial that leaves the listener questioning the nature of life, loss, and redemption. Inspired by Roger Waters' personal experiences and disillusionment with stardom, 'The Wall' remains a powerful and enduring piece of musical art.

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(thewallanalysis.com)
Game The Wall Concept Album

The Hidden Engineering of Wildlife Crossings

2024-12-21
The Hidden Engineering of Wildlife Crossings

The Wallis Annenberg Wildlife Crossing, a $92 million project near Los Angeles, is the world's largest wildlife crossing of its kind. This article delves into the engineering behind these vital structures, addressing the challenges of habitat fragmentation, noise pollution, and wildlife-vehicle collisions caused by roads. It explores various design aspects, including site selection, crossing types (underpasses, overpasses, culverts), fencing strategies, and attracting animals to use the crossings. The article highlights the different crossing behaviors of various species and corresponding engineering solutions, such as elevated bridges for large animals and culverts for smaller ones. Design considerations include animal behavior, topography, vegetation, and ensuring the crossings blend seamlessly into the landscape, minimizing human-wildlife conflict.

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(practical.engineering)
Tech Wildlife Crossings Engineering Ecology

Black Candy: A Self-Hosted Music Streaming Server

2024-12-26
Black Candy: A Self-Hosted Music Streaming Server

Black Candy is a self-hosted music streaming server, your personal music center. It offers easy installation via Docker, allowing you to quickly set up your own music streaming service. A demo is available for testing. While SQLite is the default database, PostgreSQL is also supported. Data persistence is managed by mounting the /app/storage directory. For improved performance, Nginx proxy is supported, and mobile apps are available.

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(github.com)
Development self-hosted

Enum of Arrays: A Novel Data Structure for Efficient Data Processing

2024-12-21
Enum of Arrays: A Novel Data Structure for Efficient Data Processing

This article introduces a data structure called "Enum of Arrays" (EoA), similar to the popular "Struct of Arrays" (SoA), but with enums at its core. EoA packs multiple enum values into an array, using a single tag to identify the array's type. This reduces memory usage and branch prediction overhead, leading to more efficient data processing, particularly beneficial for SIMD optimization. The article uses the database system TigerBeetle as an example, illustrating how EoA enables efficient batch processing by effectively separating the control plane and data plane, resulting in significantly improved performance.

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(tigerbeetle.com)
Development data structure SIMD optimization

The Enigma of Luigi Mangione: A Bright Young Man and a Shocking Crime

2024-12-22
The Enigma of Luigi Mangione: A Bright Young Man and a Shocking Crime

This article recounts the author's interactions with Luigi Mangione, the alleged assassin of UnitedHealthcare CEO Brian Thompson. Luigi, a bright young man from a wealthy family, purchased a premium membership to the author's blog, leading to a two-hour video call. During their conversation, Luigi expressed concerns about the erosion of human agency in modern society, likening many to unthinking 'NPCs' manipulated by technology. He voiced frustration with high US healthcare costs. The author's shock at Luigi's subsequent arrest for murder forms the crux of the article, exploring the complexities of motivation, the coexistence of kindness and cruelty, and the multifaceted nature of human behavior. The article raises questions about free will and societal influences on individual actions.

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(www.gurwinder.blog)
Misc free will social commentary murder mystery

UK Tech Firms Face New Online Safety Regulations

2024-12-16
UK Tech Firms Face New Online Safety Regulations

The UK's Online Safety Act has come into force, placing new safety responsibilities on tech companies. Ofcom has published its first codes of practice and guidance, requiring firms to assess and mitigate the risks of illegal content on their platforms, such as terrorism, hate speech, and child sexual abuse. New rules mandate enhanced content moderation, improved reporting mechanisms, and measures to protect children from sexual exploitation, including default settings to hide children's personal information. Ofcom will closely monitor tech companies' actions and impose strict penalties for non-compliance.

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(www.ofcom.org.uk)
Tech online safety UK tech companies

K8s Cleaner: Optimize Your Kubernetes Clusters

2024-12-18

K8s Cleaner is a Kubernetes cluster cleanup tool designed for administrators. It efficiently identifies and removes unused resources to boost cluster performance and reduce operational costs. Supporting all resource types, including CRDs, it offers pre-defined rules and customizable options (time-based, label-based, or custom Lua scripts). Notifications are sent via Slack, Email, and more, while a dry-run mode prevents accidental changes. K8s Cleaner streamlines Kubernetes resource management.

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(sveltos.projectsveltos.io)
Development Cluster Cleanup Resource Management

Coccinelle: A Powerful Tool for Linux Kernel Development

2024-12-26

Coccinelle is a powerful tool for Linux kernel development, used for pattern matching and text transformation. It enables the application of complex, tree-wide patches and detects problematic coding patterns. This document details Coccinelle's installation, usage, various modes (patch, report, context, org), and advanced features such as parallelization, using a single semantic patch, controlling processed files, debugging, and .cocciconfig support. Coccinelle leverages Semantic Patch Language (SmPL) and offers multiple modes for generating patches, reports, context information, and Org-mode reports, catering to diverse needs.

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(docs.kernel.org)
Development

CIA's Animal Spies: From Pigeons to Rats, Declassified Secrets of Nature's Arsenal

2024-12-13

The CIA's history of using animals in espionage is filled with creativity and challenges. From pigeons carrying miniature cameras, to the attempted use of a cat for eavesdropping in the 'Acoustikitty' program (ultimately failing due to the cat's independent nature), to robotic catfish 'Charlie' for underwater reconnaissance, and the dragonfly-mimicking miniature drone 'Insectothopter', the CIA showcased its imagination, leveraging animal characteristics for intelligence gathering. Additionally, they used animal remains as camouflaged dead drops, even employing rats soaked in cat repellent to deliver messages. These imaginative attempts highlight the CIA's innovative spirit in technology and intelligence, and also reflect the unique value of animals in special environments.

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(www.cia.gov)
Misc animal spies CIA technological innovation
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