🇺🇸 Hacker News English

Deutsche Bahn and Siemens Mobility achieved a new test speed record of 405.0 km/h on the Erfurt–Leipzig/Halle high-speed line.

High-speed tests over 300 km/h are rare on German tracks and provide valuable data on aerodynamics, acoustics, and train-infrastructure interaction.

The infrastructure performed reliably after 10 years of continuous operation, needing no adjustments for extreme speeds.

Author built a personal Ampere Altra system to support 64k page size for development.

Core components include an AsrockRack ALTRA8BUD motherboard, an 80-core Q80-30 CPU, Arctic Freezer 4U-M cooler, and eight 16 GB SK Hynix RDIMMs.

Standard PC parts used: Endorfy 700 Air case with five fans, MSI MPG A850G power supply, Lexar 2 TB NVMe, and a Radeon Pro WX2100.

Researchers use Passive Coherent Location (PCL) to repurpose cell tower signals into a radar-like detection system.

The PCL system leverages existing weak cellular echoes to map ships in harbors without installing new radar.

The system filters out strong direct signals to isolate and detect weaker echoes from vessels.

Gridfinity is an open-source modular 42×42×7 mm storage system.

It is almost entirely 3D-printable and customizable.

Online generators allow creation of custom bins, baseplates, and lids.

About 17% of cancer drugs tested in Ethiopia, Kenya, Malawi and Cameroon had incorrect active ingredient levels.

Visual inspection identified only a quarter of substandard products, with laboratory testing needed to find the rest.

Causes of poor-quality medicines include manufacturing faults, improper storage and counterfeit products.

Hacker News thread features developers sharing personal and professional projects.

Projects span AI tools, open-source software, hardware hacks, apps, games, and more.

Many are solo or small-team efforts using languages like Go, Python, Rust, Flutter, and JavaScript.

V-JEPA 2 trains a vision model by predicting masked segments in one million hours of YouTube videos to learn real-world physics in latent space.

The model’s core components include a billion-parameter encoder, a predictor for masked video tokens, and specialized 3D position embeddings.

After initial self-supervised training, attaching a 300M-parameter transformer and 62 hours of raw robot videos enables zero-shot robotic tasks like reaching, grasping, and pick-and-place with high success rates.

Former PM Tony Abbott posted his boarding pass photo publicly, exposing his booking reference.

The blogger read the booking reference, logged into Qantas’s Manage Booking page with it and Tony Abbott’s surname.

Using browser developer tools, they discovered Tony Abbott’s passport number, phone number, and internal Qantas staff comments.

China’s industrial fishing fleet accounted for 44% of all visible fishing activity worldwide between 2022 and 2024.

A total of 57,000 Chinese-flagged vessels fished for over 110 million hours during this period.

Chinese vessels conducted 30% of high seas fishing, totaling more than 8.3 million hours.

The standard Rust approach defines large error enums per module or crate, causing functions to return enums with unreachable variants.

Rust’s type system could enforce error requirements more precisely, but creating separate error enums for every function is tedious.

The terrors crate treats errors as independent structs and broadens error sets via map_err for modular error handling.