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Showing posts from April, 2019

Show HN: Turn any WiFi into a persistent group chat http://bit.ly/2PEsFtY

Show HN: Turn any WiFi into a persistent group chat Try it out on your WiFi: https://tapchat.com I’ve always been shocked at the fact that it’s easier to chat with someone on the other side of the world than with someone who is on the exact same WiFi as you. I think that is a shame because WiFi networks are essentially a bunch of existing micro-communities which your phone already automatically connects to. Think about how many other people have used or will use the same WiFi as you at home, school, work, or in public; and so far it has been practically impossible to chat or share pictures with them. After leaving my job earlier this year, I decided to work on a simple chat app that solves this problem, by simply opening a persistent group chat for every WiFi you connect to, which allows for long-lasting conversations and meaningful relationships everywhere you go. So far a great use case I've seen are college campuses where thousands of students connect to the same WiFi, and who c...
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Launch HN: Centaur Labs (YC W19) – Labeling Medical Images at Scale http://bit.ly/2UPAE8D

Launch HN: Centaur Labs (YC W19) – Labeling Medical Images at Scale Hello HN! We are Erik, Zach, and Tom, the founders of Centaur Labs ( https://centaurlabs.io ). We’ve built a platform where doctors, other medical professionals, and med students label medical images, improving datasets for AI. The idea grew out of Erik’s research when he was a PhD student at MIT’s Center for Collective Intelligence. In short, he found that by aggregating the opinions of multiple people--even including some people with little or no medical expertise--they could reliably distinguish cancerous moles from benign ones better than individual dermatologists. The three of us have been friends since we were undergrads. When we would chat about Erik’s research, it seemed like a no-brainer that there’d be demand for more accurate diagnoses. We all had our frustrations that as patients, you usually have to trust one doctor’s opinion. So we built a mobile app called DiagnosUs where users around the world analyze m...
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Launch HN: Trexo Robotics (YC W19) – Robotic Legs for Kids with Cerebral Palsy http://bit.ly/2DzXL0P

Launch HN: Trexo Robotics (YC W19) – Robotic Legs for Kids with Cerebral Palsy Hi HN community! We're Rahul and Manmeet, co-founders of Trexo Robotics ( http://bit.ly/2vuDyoN ) At Trexo Robotics, we're building wearable robotic devices to help children with disabilities learn to walk, in many cases for the first time in their lives. Video: https://youtu.be/3LW4LJIpa2o We are both Mechatronics undergrads from the University of Waterloo. Rahul later completed a Master's in Robotics at the University of Toronto and I've done my MBA at Rotman. We started this a few years ago when I (Manmeet) found out that my nephew, Praneit, has Cerebral Palsy, and that he would not be able to walk. Not walking can lead to contractures, hip subluxation, and many physiological and psychological issues for kids. We wanted to change that. We decided to use our robotics background, along with help from friends and the top rehabilitation researches in North America, and in 2016, watched my neph...
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Show HN: CoDiff 0.2 http://bit.ly/2ZGjOfZ

Show HN: CoDiff 0.2 Hello, everyone! We posted on HackerNews a couple of weeks ago debuting CoDiff ( http://bit.ly/2FWzK4I ), a productivity tool centered around your code. Since then, we’ve received a lot of useful feedback from the community that we have integrated with our product. Now, even as an individual, CoDiff ( https://CoDiff.com ) can boost your productivity by notifying you as soon as your local changes conflict with upstream commits. Conversely, if you do not see a conflict marker on your files within CoDiff, you can rest assured that you will be able to push or pull without any merge conflicts -- guaranteed. In addition, we’ve fixed all of the cross-platform bugs that were reported to us - again, thank you everyone for your feedback! We’d love if you could give our product a try and submit feedback right here, within CoDiff itself, or by emailing us at support@codiff.com. https://CoDiff.com April 28, 2019 at 01:42PM
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Show HN: Office Hours – Hold office hours by phone anytime, anywhere http://bit.ly/2L6Wwwn

Show HN: Office Hours – Hold office hours by phone anytime, anywhere Hello HN! My name is Rohan Pavuluri, and I’m launching an iPhone app called Office Hours ( https://apple.co/2IK0usY... ). The app lets you hold “office hours” by phone anytime, anywhere. You can think of it as the green Facebook messenger symbol but for calls. In real time, easily let your network know that you’re free to accept calls. And easily find out who in your network is free to accept a call from you. I built Office Hours as a side project on the weekends with a friend to address the personal pain I feel scheduling phone calls. I run a nonprofit, and I love having conversations with everyone who reaches out to learn more about our work. But these conversations are generally painful to schedule for two reasons: 1. The back-and-forth email exchange to find a time slot is exhausting. 2. I don’t want to commit to time slots on my calendar because something that takes priority -- aka anything directly work-related ...
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Show HN: High Schoolers start video series on how to write data structures in C http://bit.ly/2IH6C5h

Show HN: High Schoolers start video series on how to write data structures in C Hi everyone! We (Christopher and Govind) have started a video tutorial series of 20-25 minute long episodes on how to make various common computer science data structures, such as vectors, linked lists, hashmaps, and so on. So far, we’ve done a two-part series on how to implement vectors. Links to parts one and two of the Vectors series: https://www.youtube.com/watch?v=vr0KzD_Owxc https://www.youtube.com/watch?v=t3kgbdhUIxU (Sorry about the low quality of the video in the first link, we accidentally recorded in 720p. The second part is in 1080p!) Although so far only one of us has done a video series on a data structure, we plan on taking turns to cover the most common data structures. Our endgame is to use all these data structures we build up to write a simple C compiler in a longer series of videos. We have some plans to use a partially scripted setup to streamline the explanations of core concepts, and ...
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Show HN: PwnedPasswords as a (Micro)Service http://bit.ly/2V07UPu

Show HN: PwnedPasswords as a (Micro)Service Recently I became interested in knowing whether the passwords I used were in the list of breached passwords. One way to find out is to send your password to the link here http://bit.ly/2vrGHam. However, while the owner of that website is a well respected security researcher, I still don't think it's wise to send my password to another website. So I downloaded the 24gb file, hashed my password and grepped the file for it. That unfortunately took a long time and I realized this was the perfect opportunity to use a BloomFilter and test the inclusion of a password in a set. With a bloomfilter, the 24gb file can be compressed down to ~2gb assuming a false positive rate of 1 in a million. You can achieve even better rates with lower false positives. Despite it dropping to 2gb, I wasn't satisfied and decided to compress the bloomfilter using golomb codes. This type of data structure is known as a golomb set and I was able to get the data...
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Show HN: Build Your Side Project Challenge + SideProject eBook http://bit.ly/2L9nOSK

Show HN: Build Your Side Project Challenge + SideProject eBook Hey HN, http://bit.ly/2UCgluW I needed motivation to complete a side project I've been dabbling with for the past year, so I put together this sprint for myself -- realized others might benefit from going through the challenge as well so here it is. I'm also including my ebook, SideProject Book (www.sideprojectbook.com), as added motivation to ship! April 24, 2019 at 05:54AM
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Show HN: Vim gf-command improved http://bit.ly/2GxZXbg

Show HN: Vim gf-command improved Since a week ago I remembered myself of the awesome gf-command in Vim, which allows you to open the current filepath under the cursor in a new buffer. I thought to myself: Why am I never using this? Oh yeah, because this only works for filepaths relative to the buffer . As a javascript developer most of my time, that won’t help since I have webpack-configured projects which allows me to do some super cool absolute imports, but throws away the complete usage of the awesome gf-command. So I started a Vim plugin called gfi (goto file improved). The goal for me was to create a plugin that is plug ’n play, zero-configuration required for you to enjoy this simple but efficient plugin. So how does it work? When using this plugin your regular gf will be remapped and when pressing gf it always tries to resolve the file under the cursor using atleast the following logic: - relative to the current buffer - relative to Vim's current working directory - based on...
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Show HN: Map for Game of Thrones http://bit.ly/2VYceLf

Show HN: Map for Game of Thrones We’ve updated Map for Game of Thrones with a lot of features since its launch, 2 years ago. In addition to the app’s staple feature, TV show recap, the user can now also review all 5 books in a similar, interactive manner. You can now step through all the scenes/chapters of any TV episode or book and enjoy: - a short summary of the scene/chapter - full description or synopsis - list of characters in the respective scene/chapter - the location on the interactive map - the full transcript (for episodes) The app is also a handy Game of Thrones lore companion. You can search and browse through detailed information of 600+ locations and 1200+ unique characters. For Season 8, we will be updating the app after each new episode. Any feedback would be appreciated! Links: - Map for Game of Thrones - on the Play Store - http://bit.ly/2Iz1iAV.... - Map for Game of Thrones FREE - on the Play Store - http://bit.ly/2Iz1iAV.... - GoT Map Recap - on the App Store - http...
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Show HN: A simple self-hosted ngrok alternative http://bit.ly/2Got7bp

Show HN: A simple self-hosted ngrok alternative This is a proof of concept utility which allows you to expose local services to the internet at large: http://bit.ly/2DrRzbl In short it is a simple ngrok alternative, which you can self-host. Because it is a proof of concept it hasn't been tested extensively, but it seems like it will solve my immediate-needs. Of course it needs test, and structure added. But feedback can't hurt :) April 21, 2019 at 08:09AM
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Show HN: Spritz clone in 33 lines of TypeScript. Long words are displayed longer http://bit.ly/2IBJ2Gl

Show HN: Spritz clone in 33 lines of TypeScript. Long words are displayed longer http://bit.ly/2GgkJuH License is Public Domain/CC0 and the code is here: http://bit.ly/2UztZnN PS: This is a really quick hack because my Spritzlet license ran out and I hated that Spritz doesn't show long words longer than short words for a long time. Spritz Homepage for reference: https://www.spritz.com/ April 13, 2019 at 05:38PM
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Show HN: WindowsKnowHow – A video guide to Windows 10 http://bit.ly/2I91wOG

Show HN: WindowsKnowHow – A video guide to Windows 10 Hi everyone, I appreciate that HN is probably not my target audience but I just recently launched my own video training course on Windows 10 for beginners and non-techies and would love to get some brutally-honest but constructive feedback from the HN community (e.g. are the course videos too long, too boring, too techie, too pointless etc?). http://bit.ly/2WRQjp2 There are around 10 sample videos available for free on the homepage, but you can also sign up for a free 7-day trial (no credit card required) and gain access to the entire course (60 videos) by signing up here: http://bit.ly/2G2aN80... . All fields on the sign-up form are mandatory, but feel free to enter the following dummy info for the fields below: Company Name: HackerNews; Role: Reviewer; No of users you’d like to train: 1; You will need to provide a valid email address so that I can send the login details. Thanks in advance. April 9, 2019 at 02:51AM
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Show HN: CoDiff, a new collaboration tool for developers http://bit.ly/2FWzK4I

Show HN: CoDiff, a new collaboration tool for developers A recent HackerNews comment - “For one programmer's hourly cost, you could run 4000 CPU cores continuously. Can there really be no practical way to apply thousands of cores to boosting the programmer's productivity?” http://bit.ly/2UAKEpX This is what we have come up with. The current productivity tools - Slack, Asana, Trello, Facebook Workplace, etc. - are great, but lack direct access to your code. Building a tool directly around the code makes it more powerful for software developers: CoDiff. https://codiff.com The foundation of CoDiff is a live-view of your teammates’ local Git repositories. This brings communication benefits that other productivity tools fundamentally cannot provide. Wherever you are working, you can essentially pull up a chair next to your coworker to see and discuss what they are working on. This live code view leads to a many other productivity benefits. Existing tools will let you know your teamm...
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Show HN: Maildown (markdown email campaigns) – beta program finished http://bit.ly/2UkTmcH

Show HN: Maildown (markdown email campaigns) – beta program finished Hi, The beta program of my new startup, Maildown, is now complete and is now accepting paying customers: http://bit.ly/2UlBApF As well as a lot of stability enhancements, we've added a new help system, a new CLI ( http://bit.ly/2Ujp6yR ) and a REST API. Maildown lets you create transactional and marketing email campaigns using Markdown syntax, so you can generate and send your email content far more quickly than with traditional WYSIWYG editors. Thanks for looking, Chris April 6, 2019 at 03:34AM
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Launch HN: Atomic Alchemy (YC W19) – Manufacturing Nuclear Medicine https://ift.tt/2Vju9M3

Launch HN: Atomic Alchemy (YC W19) – Manufacturing Nuclear Medicine Hello, HN. I’m Thomas Eiden, founder of Atomic Alchemy. Atomic Alchemy will manufacture nuclear medicine and the radioactive materials used to make it, using several compact (~15MW thermal) nuclear reactors. These will be the first privately-owned nuclear reactors for nuclear medicine production. They are merely higher-powered versions of previously-licensed reactor designs that currently reside at universities. These reactor designs are passively safe and cannot melt down. With improvements in modeling and simulation that have occurred in the last few years, it is quicker and cheaper than ever to license and construct such a facility. But to be clear—we won’t be manufacturing reactors—we’ll be a chemical/drug manufacturer in the same way that Delta Airlines doesn’t manufacture planes or airports, but is a transportation company. Before starting Atomic Alchemy, I was the lead reactor core designer at the Advanced Test ...
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Launch HN: MoonVision https://ift.tt/2CQqa2p

Launch HN: MoonVision Dear HN, this is Alex, cofounder of Moonvision, an Austrian based computer vision company. We started in 2017 tracking grilled chicken at the Oktoberfest Munich [1] and transitioned into automating visual inspections tasks. Our web tools are used by quality assurance experts to manage training data and create custom models without an external workforce. For such tasks and experts, the effort to label data is often prohibitive. Therefore, we built tools that work with low amounts of initial data. To train a new pipeline we cover the following 6 steps: - Video gathering - Object mining - Snapshot detection - Annotation - Training - Deployment Training data Since video is the cheapest form of input, we extract relevant/repetitive scenes from it first. These scenes are cut to snapshots that avoid motion blur, occlusion and person specific information. Before an expert starts labelling, we create so-called auto entities. To further speed up annotation, we cluster entit...
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