Networking and the Internet, from First Principles

56 faza 2026-07-11 12:36:22 UTC fazamhd.com Qwen Share 28

The internet uses packet-switching, routing data via decentralized protocols like TCP/IP, enabling scalable, reliable global communication. Rooted in ARPANET, it evolved from telegraph principles to a protocol-driven network with DNS and TLS for addressing and security, operating without central control.

Your code is fast – if you're lucky

42 chrka 2026-07-11 11:36:22 UTC tiki.li Qwen Share 5

Modern compilers like Clang optimize Quicksort with branchless code (csel/cmov), achieving ~6x speedup over original and nearly double std::sort's performance on macOS/M1. GCC generates slower branch-based code for equivalent logic, highlighting compiler-specific optimizations.

Einstein's relativity rules chemical bonds in heavy elements, new research shows

300 hhs 2026-07-10 22:36:22 UTC brown.edu Qwen Share 120

Brown University researchers discovered relativistic effects in heavy elements like bismuth blur sigma/pi bonds in triple bonds, challenging textbook models. Photoelectron spectroscopy revealed hybridized bonds, impacting chemistry education and applications in solar cells and quantum tech.

Semantic/Hybrid Search in the Browser

3 bartdegoede 2026-07-11 13:05:22 UTC bart.degoe.de Prefix Share 0

Eight years ago I added client-side search to this blog with Lunr.js. It creates an inverted index at build time, ships it as JSON, and matches strings in your browser. No server-side engine required. It has worked fine ever since, in the sense that it finds a post if you type a word that is actually in it. Earlier this year I wrote a semantic search engine in ±250 lines of Python (the kind ...

QuadRF can spot drones and see WiFi through my wall

635 speckx 2026-07-10 16:36:22 UTC jeffgeerling.com Qwen Share 208

The QuadRF is a Raspberry Pi-powered phased-array radio enabling advanced signal processing, WiFi analysis, and RF visualization, with potential for Moon-scale radio experiments. Despite a rough UI, its MIPI-based high-speed data transfer and modular design showcase impressive performance for SDR applications.

Google Search lets creators know more about their reach

37 herbertl 2026-07-11 08:36:22 UTC theverge.com Qwen Share 21

Google introduces a Search Console feature enabling creators to track search terms leading to their Instagram, TikTok, X, and YouTube content, offering insights into audience interactions. This update expands Google Search's role as a hub for creators to monitor how users discover their social media posts.

Otary – Image and Geometry Python Library Now Has Tutorials

47 poupeaua 2026-07-11 06:36:22 UTC alexandrepoupeau.com Full Share 1

This part of the documentation contains examples of what you one can do with Otary. Those examples are just meant to help you understand how to use Otary and not to be a complete reference. Just explore and have fun with all the possibilities that Otary has to offer.

Apple sues OpenAI, accuses ex-employees of stealing trade secrets

1234 stock_toaster 2026-07-10 21:36:22 UTC 9to5mac.com Qwen Share 654

Apple sues OpenAI for trade secret theft by ex-employees, including Tang Tan and Chang Liu, who allegedly stole confidential data and used it in hiring. The lawsuit highlights over 400 Apple alumni at OpenAI, led by Jony Ive, and claims OpenAI exploited Apple's proprietary info for hardware projects.

FCC Approves Test of Space Mirror to Light Night Sky Despite Outcry

18 reaperducer 2026-07-11 12:36:22 UTC nytimes.com Full Share 9

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An iroh powered smart fan

131 surprisetalk 2026-07-11 00:36:22 UTC iroh.computer Qwen Share 35

This guide demonstrates building a smart fan using an ESP32 and iroh, measuring temperature/humidity via a DHT22 sensor and controlling a fan locally or remotely via a browser-based WebAssembly GUI, without cloud dependency. The ESP32 connects to WiFi, uses iroh's relay for global access, and employs Rust-based RPC protocols for sensor data and fan control, with optional authentication for ...

An update on residential proxies and the scraper situation

240 chmaynard 2026-07-10 20:36:22 UTC lwn.net Qwen Share 243

Websites are overwhelmed by scraper bots using residential proxies and compromised devices, evading detection through fake user behavior and coordinated attacks. Defensive measures like traffic analysis and temporary takedowns offer limited relief as attackers adapt, underscoring the need for ethical AI training data solutions.

The mask that compiles to nothing: how HotSpots JIT learned to reason about bits

41 rowbin 2026-07-11 05:36:22 UTC questdb.com Qwen Share 0

An optimizing compiler removes the redundant bitwise AND in (x << 2) & -4 because left-shifting x by 2 guarantees the two lowest bits are zero, matching -4's mask. C2 achieves this by tracking integer ranges and known bits, proving the AND operation has no effect.

SpaceX wants to launch 100k more Starlink satellites for 100x the bandwidth

225 CrankyBear 2026-07-10 18:36:22 UTC zdnet.com Qwen Share 731

SpaceX seeks FCC approval for 100,000 Gen3 Starlink satellites to deliver ultra-low-latency, multi-gigabit broadband, requiring hardware upgrades and facing interference risks. The plan aims to expand satellite internet access but encounters regulatory challenges, competition, and astronomical objections.

The vintage beauty of Soviet control rooms (2018)

148 mvdtnz 2026-07-11 05:36:22 UTC designyoutrust.com Full Share 48

Just for the pleasure, a selection of vintage control rooms dating back to the Soviet era! A beautiful collection of control rooms filled with large buttons and analog dials, long before the democratization of computers and screens. If you want more awesome content, subscribe to Design You Trust Facebook page.

Good Tools Are Invisible

486 theanonymousone 2026-07-10 13:36:22 UTC gingerbill.org Qwen Share 218

A good tool should be invisible, not celebrated for complexity or puzzles. Avoid reframing flaws as fun or identity; prioritize productivity over tribalism and honest evaluation.

AI 2040: Plan A

310 kschaul 2026-07-10 13:36:22 UTC ai-2040.com Qwen Share 330

Plan A advocates for an international agreement with transparent AI research and global collaboration to safely develop superintelligence, avoiding existential risks. Without such measures, unchecked AI races risk power concentration and catastrophic outcomes, urging immediate governance action.

Late Bronze Age Collapse

387 dmonay 2026-07-10 13:36:22 UTC acoup.blog Qwen Share 266

The Late Bronze Age Collapse (c. 1220–1170 BC) saw interconnected states in the Eastern Mediterranean and Middle East decline or collapse, marked by site destructions and political fragmentation. Causes remain debated but likely include climate shifts, warfare, and economic strain, with uneven regional impacts.

Silent speech with ultrasound

72 chrwn 2026-07-11 00:36:22 UTC alephneuro.com Qwen Share 15

Our system achieves 15.6% word error rate using 50 hours of ultrasound tongue data, outperforming lip-reading with 12.5% on 1M hours. Challenges include hardware miniaturization and non-American accents, but it generalizes across speakers and shows promise for silent speech tech.

The tech of 'Terminator 2' – an oral history (2017)

232 markus_zhang 2026-07-10 17:36:22 UTC vfxblog.com Qwen Share 79

In 1991, ILM pioneered CGI tools like 'Make Sticky' and 'Body Sock' to create Terminator 2's liquid metal T-1000, overcoming limited resources and nascent tech. Artists and developers collaborated intensively, blending innovation with practical problem-solving, cementing the film's legacy as a VFX milestone.

Combustion engine web-based simulator

199 mytuny 2026-07-10 17:36:22 UTC combustionlab.net Full Share 70

Crank-angle-resolved combustion engine simulator: build an engine, watch it run, and read real thermodynamics — P–V diagrams, dyno curves, knock prediction and more.

After 7 years in production, Scarf has reluctantly moved away from Haskell

173 aviaviavi 2026-07-10 14:36:22 UTC avi.press Qwen Share 210

A long-time Haskell advocate, the author moved Scarf's new development to Python due to AI-driven workflows and Haskell's compilation/ecosystem bottlenecks, urging the community to prioritize AI-era optimizations like faster builds, better tooling, and agent-friendly design to remain relevant.

Alternate clock designs and time systems

170 ethanpil 2026-07-10 14:36:22 UTC serialc.github.io Qwen Share 90

The article critiques the traditional 24-hour time system's inconsistency and explores alternative metric-based time designs, like decimal or hexadecimal formats, for simpler calculations and readability, while acknowledging challenges in adoption and accuracy. It invites suggestions for custom time systems, emphasizing flexibility in reimagining how we measure and display time.

Snails' teeth beats spider silk as nature's strongest material (2015)

208 simonebrunozzi 2026-07-10 17:36:22 UTC smithsonianmag.com Qwen Share 155

Marine snails' teeth, composed of goethite nanofibers and protein, are Earth's strongest natural material, exceeding spider silk and Kevlar. Though outmatched by graphene, they rival top carbon fibers, while rare materials like lonsdaleite surpass diamond's hardness.

Inference Optimization for MiMo v2.5: Pushing Hybrid SWA Efficiency to the Limit

93 theanonymousone 2026-07-10 21:36:22 UTC mimo.xiaomi.com Qwen Share 37

MiMo-V2.5 uses Hybrid SWA and MoE to cut KVCache by 7x, boosting efficiency in long-context and multimodal tasks. Optimizations like tiered caching, SWA-aware systems, and GCache integration enhance throughput and hit rates, achieving 93%+ server-side efficiency.

GPT-5.6 Sol Ultra produces proof of the Cycle Double Cover Conjecture [pdf]

484 scrlk 2026-07-10 18:36:22 UTC cdn.openai.com Qwen Share 393

The paper proves the Cycle Double Cover Conjecture, asserting every bridgeless graph has a cycle cover where each edge is in exactly two cycles. The proof leverages cubic graphs, Γ-flows, and linear algebra to construct the cover, extending prior results on 8-flows and 3-edge-colorings.

Show HN: Sdlc factory built on pi.dev:intent->DDD->architecture->tested code

3 arman-w-jalili 2026-07-11 11:36:22 UTC github.com/arman-jalili Prefix Share 0

Guardian is an SDLC orchestrator for AI-assisted development. It takes you from a business intent — "I need to build audit logging for regulated financial transactions" — to an enforcement pipeline that blocks merges if the implementation violates the architecture. The entire lifecycle lives in a single .pi/ directory. Every artifact (modules, ADRs, roadmap, issues, CI scripts, agent ...

Show HN: Getting GLM 5.2 running on my slow computer

871 vforno 2026-07-10 13:36:22 UTC github.com/justvugg Qwen Share 215

colibrì runs GLM-5.2 (744B MoE) on 25 GB RAM via int4 quantization, disk-streamed experts, and C-based zero-dependency engine, achieving lossless inference with speculative decoding and adaptive caching. It leverages AVX2, MTP heads, and batched expert reads, but requires NVMe SSDs and careful hardware management due to disk I/O and wear risks.

New York City to ban deceptive subscription practices

565 randycupertino 2026-07-10 18:36:22 UTC theguardian.com Qwen Share 276

New York City's Mamdani administration bans deceptive subscriptions and junk fees, enforcing fines for hard-to-cancel services and requiring upfront pricing for all charges, targeting housing and consumer markets. The rules aim to combat hidden costs and corporate malpractice, facing industry opposition but backed by consumer advocates.

A love letter to flashcards

164 surprisetalk 2026-07-10 15:36:22 UTC lesleylai.info Qwen Share 98

Initially dismissing flashcards for deep learning, the author adopted spaced repetition via Anki, creating personalized cards for concepts and insights rather than rote facts. This approach enhanced long-term retention and enabled resuming learning after breaks.

Computation as a universal and fundamental concept

145 simonpure 2026-07-10 15:36:22 UTC ergo.org Qwen Share 112

Tim Roughgarden explores computational limits, starting with Turing's 1936 proof that some problems (like the halting problem) are unsolvable by algorithms. He then examines NP-completeness, showing that many problems resist efficient solutions, leading to the unresolved P vs NP question with implications for cryptography and AI.