technology
-
A heat pump does not create most of its heat. It moves heat using a compressor, refrigerant, coils and a reversing valve—letting one machine heat a building in winter and cool it in summer.
-
Honda, Taisei and Taisei Rotec are preparing public-road tests of a dynamic wireless charging system designed to transfer up to 150 kW to moving EVs.
-
OSSolidity.001 explains the beginner mental model for Solidity: what smart contracts are, what the Ethereum Virtual Machine does, and how Solidity source becomes EVM bytecode that Ethereum nodes execute.
-
OSZig.001 introduces Zig from first principles: source files, the Zig toolchain, zig init, zig build run, a minimal program, and the path from source code to a native executable.
-
Learn data-center reliability engineering: availability, MTBF, MTTR, failure domains, FMEA, preventive maintenance, MOP/SOP/EOP, change control, root cause analysis, and corrective action.
-
OSEmojicode.001 introduces the Emojicode programming language, showing how emoji tokens represent familiar ideas such as an entry point, blocks, output, strings, and typed program structure.
-
OSETC.031 explains HART communication over 4–20 mA loops, FSK signaling, field communicators, device data, loop connections, and basic HART troubleshooting.
-
Goodfire is deploying activation-based AI security monitors that inspect a model’s internal signals in real time, aiming to catch reward hacking and cyber misuse before an agent acts.
-
OSEEC.016 teaches power factor correction engineering: kVAR sizing, capacitor banks, automatic steps, overcorrection, harmonics, detuned reactors, and commissioning measurements.
-
OSITC.003 teaches Windows process troubleshooting with Task Manager, PIDs, CPU and memory sorting, tasklist, safe process termination, and Sysinternals Process Explorer.
-
Windows Command #36 explains sc stop: stopping Windows services, STOP_PENDING vs STOPPED, service names, sc.exe in PowerShell, verification, and safe troubleshooting.
-
Linux Command #47 explains newgrp: switching the current group in a shell, newgrp -, verifying with id, file group ownership, membership rules, and safe troubleshooting.
