Pular para o conteúdo principal

Postagens

Mostrando postagens de abril, 2023

Noticias do Hacker News: Portable EPUBs

Portable EPUBs 448 by sohkamyung | 174 commentarios de Hacker News.

Noticias do Hacker News: Ask HN: Most interesting tech you built for just yourself?

Ask HN: Most interesting tech you built for just yourself? 616 by l2silver | 833 commentarios de Hacker News. Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.

Noticias do Hacker News: Show HN: Homemade rocketship treehouse – hardware to custom OS

Show HN: Homemade rocketship treehouse – hardware to custom OS 385 by david_elson | 48 commentarios de Hacker News. (This was previously submitted as https://ift.tt/uVE4jSB ) The Ravenna Ultra-Low-Altitude Vehicle is a backyard rocketship treehouse nestled in the Seattle neighborhood of Ravenna. Click the link to see a demo video ( http://rocket.jonh.net ). The hexagonal treehouse is about 6.5 feet (2 meters) across at its widest point. The frame is welded mild steel with riveted aluminum siding. It contains nearly 800 LEDs forming dozens of numeric displays spread across 14 control panels, each with an acrylic face laser-cut and etched with labels such as "Lunar Distance" and "Hydraulic Pressure". The pilot controls the rocket using a joystick and panels full of working switches, knobs and buttons. Underneath the capsule are three "thrusters" that shoot plumes of water and compressed air under the control of the pilot's joystick, simulating real po...

Noticias do Hacker News: Tell HN: Eid Mubarak

Tell HN: Eid Mubarak 765 by asim | 313 commentarios de Hacker News. To the Muslims on HN, Eid Mubarak! And to everyone else, Eid Mubarak! For those who don't know. Eid is a day of celebration after the month of Ramadan, in which Muslims fasted for 30 days from sunrise to sunset with no food or water. It's something 2B people around the world celebrate to today or tomorrow (moon sighting permitted). A note on Ramadan. To those interested in intermittent fasting, longevity, and coming back to a more human experience not drowning in technology, food and consumerism I would say check it out! After over 20 years of doing it I'm still learning something new every year, or I should say, unlearning bad habits we've created for ourselves as a society through abundance. Hope you all have a great day!

Noticias do Hacker News: Show HN: GPT-4-powered web searches for developers

Show HN: GPT-4-powered web searches for developers 584 by rushingcreek | 233 commentarios de Hacker News. Hi HN, Today we’re launching GPT-4 answers on Phind.com, a developer-focused search engine that uses generative AI to browse the web and answer technical questions, complete with code examples and detailed explanations. Unlike vanilla GPT-4, Phind feeds in relevant websites and technical documentation, reducing the model’s hallucination and keeping it up-to-date. To use it, simply enable the “Expert” toggle before doing a search. GPT-4 is making a night-and-day difference in terms of answer quality. For a question like “How can I RLHF a LLaMa model”, Phind in Expert mode delivers a step-by-step guide complete with citations ( https://ift.tt/oauyLfw... ) while Phind in default mode meanders a bit and answers the question very generally ( https://ift.tt/3CkbqDF... ). GPT-4 is significantly more concise and “systematic” in its answers than our default model. It generates step-by-st...

Noticias do Hacker News: iOS lets carriers add WiFi networks that you can’t remove or stop from joining

iOS lets carriers add WiFi networks that you can’t remove or stop from joining 537 by newZWhoDis | 207 commentarios de Hacker News. Well this was a major surprise so I figured I’d share it here to get some eyeballs on it. Essentially, the latest iOS (16.4 at post time) allows your cellular carrier (via eSIM) to add “managed networks” to your device. These networks cannot be removed, they cannot have “automatically join” disabled, and they have equal priority with your real, personal networks. So guess what happens when your neighbors get a wifi/modem combo that blasts a free hotspot SSID? Not only does it pollute the already crowded 2.4ghz band, your iPhone will often prefer this connection over your real /local wifi (despite said wifi being at 1 bar). As of post-time, there is no way to remove these networks short of completely disabling cell service/removing the eSIM and resetting all network settings. You can see this for yourself by going to WiFi/“edit” and scrolling down. Edit:...

Noticias do Hacker News: Launch HN: OutSail (YC W23) – Wingsails to reduce cargo ship fuel consumption

Launch HN: OutSail (YC W23) – Wingsails to reduce cargo ship fuel consumption 453 by jmoorebeek | 215 commentarios de Hacker News. Hi HN! I’m Joseph, and along with Arpan and Bailey we are the founders of OutSail Shipping ( https://ift.tt/zg2h9dT ). We’re building a sail the size of a 747 that rolls up into a shipping container. When deployed, it will generate thrust from the wind to reduce the fuel consumption of a cargo ship. An array of these devices will reduce fuel consumption on ships by up to 20%. These sails are easily stowed and removed to cause no interference with cargo operations. Here’s a short video showing our prototype: https://www.youtube.com/watch?v=VUpVqzpym54 . Sails powered ships for millennia; but then the convenience of energy-dense fuels displaced sails. As ship speeds eventually exceeded wind speeds, the consensus became that sails had no place in shipping and were relegated to hobbyists and sport. Fast forward a century and a half, and maritime shipping, li...