Show HN: Infinity Whiteboard, Designed for Teachers https://ift.tt/jGo8DSL

Show HN: Infinity Whiteboard, Designed for Teachers I've created a whiteboard which I use every lesson when teaching maths, though it can be used for anything. It currently has a few hundred teachers using it daily. It's designed for use with touch-screen interactive whiteboards in classrooms, and stays in sync with your phone/tablet/whatever without signup/login. You can also find me on Twitter where I post updates etc: https://twitter.com/jakegmaths Some features and cool things: * Sync devices without signup - offline by default, just hit 'sync devices' and use the same code on multiple devices to sync * Touch-first - 1 finger draws; 2 finger pan/zoom; 3 finger gestures like changing pen colour * Add images - when teaching, this is usually photos of student work taken on my phone and auto-sync'd to the whiteboard at the front of the room * Add PDFs - when teaching, these are usually past paper exams which I then annotate over with the class * Zen mode - 3 finger tap or hit the ∞ icon to hide the UI; something I use every lesson so students can focus on the actual maths (there's also a fullscreen button when not on iOS) * Visualiser - often when teaching we'll work on paper with a webcam aka 'visualiser' pointing down at it; this projects that to the main whiteboard, with optional cropping, freeze-frame and snapshots * Screencast - many teachers use eg PowerPoint to teach; instead, I'll use PowerPoint in edit/design mode rather than slideshow mode, with a locally-cast cropped portion of that on the main whiteboard at the front of the room. This enables me to eg edit my PowerPoint as I go and use all the PowerPoint tools not available in slideshow mode * Instant replay - hit the play button to play back all the scribblings currently showing on the screen * Magnet mode - when sync'd with another device, use the magnet icon so the other device follows you. Most of my teaching is now via a tablet-with-stylus anywhere in the room, and as I pan/zoom around with the tablet the main whiteboard comes with me... but only when I want it to by activating the magnet * Student mini-whiteboards (MWBs) - if my students have devices and I want them to use them, I 'sync devices' then enable student MWBs and each student has a live copy of the whiteboard, and I can see what they write and can showcase any student instantly on the main board * PWA support - install as a PWA and you can download whiteboards as .iwb files which can then be double-clicked to open/edit on desktop * Free - I have no plans to charge for this Other things you may find interesting from a tech perspective: * The client is a single <5,000 lines HTML file, with JS, CSS, SVG-favicon all inlined (plus PDF.js lazily loaded if you add a PDF) * This is vanilla Javascript with no frameworks or libraries (except PDF.js) and no minification or build scripts - just view-source and check out how ugly all my code is! * 77.6kB for everything (except PDF support)... the size of 'modern' websites frankly disgusts me * The server is just a single ~500 line Javascript file and runs on Deno (also ported to Bun but unstable for now) and really just serves some static files, deals with websockets and temporarily stores images people add * Costs ~£5/month on Heroku * There's no database or any long-term persistence - Heroku servers restart every 24h and nothing is saved beyond that; it's all ephemeral https://www.mathsuniverse.com/infinity May 12, 2023 at 06:56PM

Show HN: Explore career opportunities in AI-first companies https://ift.tt/sBycYfe

Show HN: Explore career opportunities in AI-first companies Like many unemployed right now, I've been playing with LLMs and learning a lot. It's an exciting space right now, with many opportunities. So I curated over 100 companies in the space and joined all their opportunities (not only tech) in a single site. I believe it can be interesting for many people recently affected by layoffs and looking to restart in a market that is booming — for better or worse. Exploring the data about the market is also something that I'm starting to look into [1]. Companies can be added for free and get highlighted by sponsoring the site. I hope that someone out there who is searching for a new job finds this helpful. 1- https://ift.tt/0hD7gzt... https://ift.tt/f5CPyLb May 12, 2023 at 09:40PM

Show HN: The Leica MPi: A Leica M2 with a Raspberry Pi-Powered Digital Sensor https://ift.tt/9H4mT3j

Show HN: The Leica MPi: A Leica M2 with a Raspberry Pi-Powered Digital Sensor PetaPixel article: https://ift.tt/itJ4TqM... https://ift.tt/J1Q96mt May 12, 2023 at 04:55PM

Show HN: Plan international rendezvous with different passport holders https://ift.tt/z1GNyeo

Show HN: Plan international rendezvous with different passport holders https://unli.xyz/city/honeymoon/ May 12, 2023 at 07:46AM

Show HN: Google's photorealistic 3D tiles for GPS activity visualization https://ift.tt/6Ze3Twa

Show HN: Google's photorealistic 3D tiles for GPS activity visualization I made a Proof of Concept integration of Google's new 3D tile model (which got announced today at Google's I/O) for my hiking/skiing/running app. It's basically Google Earth plus your GPS track, all the heavy lifting done by Cesium.js. I'm wondering how much this is gonna cost once it's out of experimental phase. https://ift.tt/MSjliE4 May 12, 2023 at 03:44AM

Show HN: A Tool for DJs to Talk to Spotify's Recommendations API https://ift.tt/gJikWlh

Show HN: A Tool for DJs to Talk to Spotify's Recommendations API https://ift.tt/FPsvIHm May 12, 2023 at 12:59AM

Show HN: Browsing in Public https://ift.tt/1Sq0rLv

Show HN: Browsing in Public https://inpubliq.com May 12, 2023 at 12:55AM

Show HN: Browse, upvote and comment on HN from command line https://ift.tt/YDNr21b

Show HN: Browse, upvote and comment on HN from command line Hi HN! I've built hnterminal, a pip package that lets you browse, upvote, and comment on Hacker News from your terminal. To get started: $ pip install hnterminal $ hnterminal hnterminal is an interactive REPL environment with commands like "get_front_page", "get_tree", "upvote", "reply_to", etc, each of which supports rich arguments and comes with full help documentation. Checkout the readme. https://ift.tt/0srbB6H May 11, 2023 at 09:57PM

Show HN: Interactive story map built using Google 3D Tiles and deck.gl https://ift.tt/iKYIz6E

Show HN: Interactive story map built using Google 3D Tiles and deck.gl https://ift.tt/yXUuPO9 May 11, 2023 at 12:22PM

Show HN: MedGPT – Get information about medicines, treatments, and diagnoses https://ift.tt/5jePUQV

Show HN: MedGPT – Get information about medicines, treatments, and diagnoses https://ift.tt/8OhE0Hk May 11, 2023 at 05:21PM

Show HN: BundleStore – increase revenue by offering your product in a bundle https://ift.tt/csvB1hQ

Show HN: BundleStore – increase revenue by offering your product in a bundle On BundleStore, users buy more to save more. By offering your product in a bundle, you can make your product instantly more attractive! Visit the website and tell me what your product is, and I'll do the rest. https://ift.tt/ZxIcgTV May 11, 2023 at 02:28PM

Show HN: Search Xkcd https://ift.tt/difhc6P

Show HN: Search Xkcd https://xkcd.netcore.io May 11, 2023 at 01:33PM

Show HN: Deterministic objective Bayesian inference for spatial models [pdf] https://ift.tt/OY9HwbN

Show HN: Deterministic objective Bayesian inference for spatial models [pdf] To give some context, objective Bayesian inference refers to Bayesian analysis (i.e. integrating over the parameter space) using a prior that is design to represent "minimal information" (see [1], [2], and [3] for an overview). Particularly in cases where a model's likelihood function is not strongly peaked about a point, objective Bayesian inference can give better results than methods based off of point estimates like Maximum Likelihood [4]. Reference priors provides a general approach to construct so-called noninformative priors that are suitable for Objective Bayesian analysis ([5], [6]). The approach takes a practical viewpoint of noninformative priors and looks to build priors that are both tractable and provide good performance on frequentist coverage simulations. See Section 2 for a description of how the process and frequentist simulations work and [7] for examples with some basic models (e.g. why 1/σ^2 is the noninformative prior for the variance of normally distributed data with known mean). [8] was the first to develop reference priors for Gaussian processes models, and [9] extended the work to handle Gaussian Processes with noise (or nugget effects). The project I'm working on provides software and algorithms to do deterministic inference using the prior from [9]. Typically, such inference has been done using MCMC sampling algorithms; but my belief is that deterministic algorithms can give results that are more consistent, less sensitive to parameter tweaking, and more efficient, at the expense of some engineering cost and loss of generality. For an example of how the algorithms work on a real-world data set of zinc measurements in a flood plain along the Meuse river [10], see https://ift.tt/Oc4NW8C... References [1]: https://ift.tt/Rz5OZBm [2]: https://ift.tt/xjrcb4P... [3]: https://ift.tt/BVkDEMv [4]: https://ift.tt/14Zy9ps... [5]: https://ift.tt/9xm5pnS... [6]: https://ift.tt/sxaVXAY [7]: https://ift.tt/NdM5DOt... [8]: https://ift.tt/waErfnj... [9]: https://ift.tt/dmgMpCc... [10]: https://ift.tt/iJLQI18... https://ift.tt/eiEl41n May 10, 2023 at 08:37PM

Show HN: Mineo.app – Better Python Notebooks https://ift.tt/F9OBLgH

Show HN: Mineo.app – Better Python Notebooks Hello everyone, I would like to introduce our startup to HN: Mineo.app. Mineo.app is a production-ready SaaS Python notebook that provides a complete environment for building your data applications: Dashboards, Reports, and Data Pipelines based on Python notebooks. Key features: * Superpowered jupyter-compatible Python notebooks with extra goodies like: version control, commenting support, custom docker images, etc... enhanced with no code components that allow to create beautiful dashboards and reports. * Data Pipelines: Ability to schedule and run one or more notebooks. * Integrated file system to manage your files and projects with detailed permissions and groups. We have a freemium licensing model, so you can start using Mineo just by registering with your Github/Google/Microsoft account for free without a credit card. And it's free for educational purposes ;-) Diego. https://www.mineo.app/ May 9, 2023 at 06:49PM

Show HN: Millions Dollar AI Homepage https://ift.tt/jxLU7Yy

Show HN: Millions Dollar AI Homepage https://ift.tt/zoSBcsl May 10, 2023 at 06:15PM

Show HN: Awesome OpenAI Whisper List https://ift.tt/RU0L1f7

Show HN: Awesome OpenAI Whisper List https://ift.tt/Ve4nxRJ May 10, 2023 at 04:44PM

Show HN: A clock app developed based on flutter https://ift.tt/S2BWcMx

Show HN: A clock app developed based on flutter https://ift.tt/kgFbaHw May 10, 2023 at 09:30AM

Show HN: Build progressively enhanced reactive HTML apps using Go and Alpine.js https://ift.tt/Bf7ZrGk

Show HN: Build progressively enhanced reactive HTML apps using Go and Alpine.js Fir leverages Golang’s standard library html/template package and a bit of alpinejs to allow building reactive UIs. You start with plain old html and use alpinejs to enhance it to bring no-page-reload interactivity to web apps. The Fir toolkit is designed for Go developers with moderate html/css & js skills who want to progressively build reactive web apps without mastering complex web frameworks. It includes a Go library and an Alpine.js plugin. How it works ? On receiving user-interactions the fir server re-renders html templates and sends it over the wire where the fir client library selectively updates the changed areas. When a user event is received by a Fir route, an array of html templates are rendered on the server and returned as an array of DOM events to the browser. The DOM events are consumed by the alpinejs plugin and dispatched within the DOM where listeners attached to elements can use the event to update the DOM. See the demo and quickstart here: https://ift.tt/3ik67sX https://ift.tt/3ik67sX May 10, 2023 at 05:33AM

Show HN: Card game where players write their own cards that get parsed into code https://ift.tt/y1RtOUd

Show HN: Card game where players write their own cards that get parsed into code Wordbots is a long-running side project I've been working on on-and-off for the past ~7 years that I finally feel comfortable enough with to share with the HN community. It's an online tactical card game (inspired by games like Hearthstone and Magic: the Gathering), where players write their own cards in natural language, that gets parsed down to JavaScript. The English-to-JavaScript translation is handled by a semantic parser operating on a hand-crafted CCG grammar – kind of an “old-school” approach in this age of LLMs but one that performs quite well on the very constrained language of Wordbots cards. The resulting game gets pretty wacky as players can create all sorts of cards, though there are some game formats that try to produce more balanced gameplay as well (e.g. one format in which both players shuffle their decks together, and various draft formats). If you're curious about how it all works, I made a write-up about it here: https://ift.tt/pnCYHbk And if you want to chat about Wordbots beyond this thread, please don't hesitate to join our discord at https://ift.tt/5ak4Kls . I'd love to hear any and all feedback. -Alex https://ift.tt/LW8ZADo May 10, 2023 at 01:01AM

Show HN: Engineering Book Club https://ift.tt/L60k918

Show HN: Engineering Book Club An online community that enjoys reading and discussing engineering books together. https://ift.tt/pRcUuhI May 9, 2023 at 11:32PM