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  • RTK Experiments

    2 days ago
    • GPS devices provide a false sense of accuracy due to various factors like inertial corrections and errors in measurements
    • For general use, most people do not require high accuracy (e.g. 1m, 0.1m, or 1cm)
    • Civilian GPS precision is around 30m, but can be improved with techniques like Dual Frequency L1+L2 and DGPS
    • Surveyors use specialized GPS equipment for high accuracy, leveraging continuous error correction from nearby receivers
    • RTK (Real Time Kinematic) is a real-time GPS enhancement for precise positioning, commonly used in surveying

  • NOAA Forecasts Solar Storm (G4)

    2 hours ago
    • NOAA forecasts severe solar storm with a Geomagnetic Storm Watch for May 10
    • Solar flares and CMEs from a large sunspot cluster reported from May 8 onwards
    • Potential impacts on Earth's infrastructure, communications, electric power grid, and satellite operations
    • The onset of a geomagnetic storm will be monitored using NOAA and NASA's space assets
    • Auroras may be visible as far south as Alabama and Northern California during severe geomagnetic storm
    • Media availability scheduled for May 10 at 10 a.m. EDT with experts from NOAA's Space Weather Prediction Center

  • Player-Driven Emergence in LLM-Driven Game Narrative

    2 hours ago
    • Exploring interaction with large language models (LLMs) in game narratives
    • Players can influence the evolution of game narratives through interactions with non-player characters generated by LLMs
    • Using GPT-4 to convert game logs into a node-graph to represent the narrative in player gameplay
    • Players can discover new emergent nodes in the narrative through interactions with non-deterministic behavior of LLMs
    • Players who enjoy discovery, exploration, and experimentation tend to create the most emergent nodes in the narrative

  • Grace Version Control System

    4 days ago
    • Grace is a cloud-native version control system designed to be elegant, easy-to-use, and fast
    • Grace is not yet production-ready and should be used for design, development, testing, and feedback purposes only
    • Grace aims to simplify version control concepts, improve user experience, and enhance scalability
    • Grace features event-sourced architecture, real-time collaboration, auto-rebasing, and conflict resolution with AI assistance
    • Grace supports handling large repositories, including monorepos, and storing large files efficiently
    • Grace offers a native GUI app for various platforms, CLI, and web UI, customizable branching strategies, and secure permissions management
    • Grace SDK is a .NET class library used by Grace.CLI to interact with Grace Server via HTTPS calls
    • Grace.Actors contains the code for the Actors in the system and is exclusively used by Grace.Server
    • Grace.Shared is where common code is stored and is utilized by all Grace.* projects
    • Grace.Avalonia and Grace.Blazor are future projects to provide GUIs for Grace on multiple platforms
    • CosmosJsonSerializer is a custom JSON serializer for deploying Grace with Azure Cosmos DB
    • Grace.Load is an experimental load test project for Grace.Server
    • Our Code of Conduct emphasizes being graceful in interactions and creating something embodying grace in design
    • Grace Server will be shipped as a container available on Docker Hub, with plans for Docker Compose template and Kubernetes configuration for deployment

  • Growing a Tech Startup (MemSQL/SingleStore) in Portugal to 40 Employees

    17 hours ago
    • Started as a remote employee in Portugal, grew an engineering hub there to 40+ employees
    • Learned about expanding engineering teams abroad over 7 years, including starting hubs in Ukraine and India
    • Options for starting a new engineering hub for a mid-to-late stage startup, including hiring full-time contractors or using EOR services
    • Geographically binding teams to prevent silos and enable better collaboration
    • Importance of having a local site leader with freedom to operate in expanding teams abroad
    • Legal logistics in Portugal and considerations around benefits, time off, and other regulations
    • Finding talent in Portugal through referrals, career fairs, networking, and internships
    • Approach to hiring inexperienced people and giving them challenging projects for growth
    • Managing time zones and fostering async communication to facilitate working across multiple countries
    • Organizing local events, hosting leadership visits, and diffusing company culture in different locations
    • Considerations around salaries for companies expanding in Europe
    • The more you pay in software engineering salaries, the better talent you can attract up to a certain degree
    • In Portugal, stock options are still important to motivate people despite high taxes
    • Utilizing referrals and online job listing websites like LinkedIn for hiring in Marketing, HR, and IT roles in Portugal
    • Having a full-time HR person with knowledge of Portuguese regulations has been beneficial for the company
    • Growth of the company in Portugal from 3 to over 40 employees between late 2019 and early 2024
    • Multiple office spaces in Lisbon and Coimbra due to company growth

  • Fobos SDR: 14-bit, 100 kHz to 6 GHz SDR, up to 50-MHz bandwidth, receive only

    3 hours ago
    • Fobos SDR is a high-performance Software-Defined Radio (SDR) receiver
    • Operating frequency range from 100 kHz to 6 GHz with up to 50 MHz bandwidth
    • 14-bit signal sampling resolution ensures full data integrity
    • Features two auxiliary input channels (HF1 and HF2) for coherent direct sampling
    • Supports external clock input and compatible with popular software like SDRSharp and GNURadio
    • Ideal for hobbyists, researchers, and professionals in radio communication

  • Strfry() Gives Skewed Distributions

    3 hours ago
    • Reported by Aurelien Jarno on April 21, 2007, at 22:36 UTC
    • Last modified on May 9, 2024, at 15:59 UTC
    • 7 users involved
    • Host, Target, and Build platform: x86_64-unknown-linux-gnu
    • Last reconfirmed on May 6, 2012, at midnight
    • Reference to a user 'fweimer' with security-related remarks

  • The dark heart of modern chess

    8 hours ago
    • Chess is experiencing a resurgence in popularity, driven by factors like the pandemic, 'The Queen's Gambit,' and online platforms like Chess.com and Twitch.
    • The game of chess is marred by issues like sexism, harassment, and misconduct, even at professional levels.
    • Internet culture has heavily influenced the way chess is played online, leading to rapid games, online abuse, and cheating concerns.
    • The chess community faces challenges related to cheating, with incidents involving players using computer programs, signals, and other deceptive methods to gain an advantage.
    • Chess clubs and events have seen a resurgence as well, with new venues catering to different demographics and blending chess with elements of nightlife.
    • Cheating in chess can ruin players' enjoyment of the game
    • Chess can be brutal for the ego as losing means you weren't good enough
    • Online chess can lead to distractions like worrying about Elo ratings
    • Chess can exacerbate negative behaviors like sexism, abuse, and elitism
    • Having a solid fundamental strategy in chess can lead to success despite lack of complex plans
    • Offline chess experiences can be more magical and enjoyable compared to online play

  • Distributed System Daemons: More Than a Twinkle in Goblins' Eye

    12 hours ago
    • Spritely Goblins aims to make networking easier and safer
    • A project is underway to port the GNU Shepherd system layer to Guile Goblins
    • The Shepherd manages system daemons running on Guix installations
    • The integration of Goblins will empower the Shepherd with new abilities
    • The project plans to allow distributed computing via Shepherd daemons on different machines
    • The NLnet Foundation is providing support for this and other Spritely-related projects
    • Whippet is a garbage collector project for Guile, enhancing performance
    • Pre-Scheme is being modernized as a statically-typed systems programming language for Guile ecosystem
    • The Shepherd port and other ongoing projects demonstrate a bright future for Spritely technology

  • AMD Publishes Micro Engine Scheduler "MES" Firmware Documentation

    14 hours ago
    • Site is supported by advertisements to maintain operations for over 19 years
    • AMD publishes Micro Engine Scheduler (MES) firmware documentation in response to concerns raised by Tiny Corp
    • MES firmware responsible for scheduling graphics and compute work on AMD RDNA™ 3 GPUs
    • Documentation available on GPUOpen.com, MES firmware still in legal review/open-sourcing process
    • AMD aims to release more open-source components throughout the year

  • Space-efficient indexing for immutable log data

    12 hours ago
    • Seq uses a disk-backed hashmap to index high-cardinality predicates efficiently
    • Records in Seq are initially ingested into unordered write-ahead-logs based on timestamp
    • Indexes in Seq reduce IO needed for queries and are computed after logs are coalesced
    • Traditional bitmap indexing works well for low-cardinality properties but not for high-cardinality ones
    • Disk-backed hashmap is used for high-cardinality indexes in Seq to store hashes and page hits
    • Layout of the disk-backed hashmap on disk includes bucket offsets, keys, and values
    • HashMap in-memory representation is built during indexing and formatted into its on-disk representation at the end
    • Comparison between disk-backed hashmap, odht, and bincode in terms of size on disk and reading performance
    • Disk-backed hashmap is memory-mapped directly from disk for indexing in Seq

  • ppstep: Interactive C/C++ preprocessor macro debugger

    11 hours ago
    • C and C++ preprocessors allow users to write code through macros, which can be hard to follow but provide high abstraction levels
    • PPstep is a debugger for macro writers to debug and refactor macros effectively
    • PPstep allows single-stepping through macro expansion, setting breakpoints on macros, and backtracing macro expansions
    • To use PPstep, clone the repository, ensure a C++17-supported compiler, build Boost, and run ppstep with your source file
    • PPstep supports preprocessor flags like include directories, defining and undefining macros
    • During preprocessing, you can use commands like step, backtrace, forwardtrace, break, continue, and expand for visualization and debugging

  • How the ADHD Brain Processes Sugar Differently

    11 hours ago
    • The core issue with ADHD is how the brain processes glucose
    • Glucose is essential for powering every cell in the body, especially the brain
    • ADHD brains may have issues metabolizing glucose which can affect brain chemicals
    • ADHD individuals show reduced glucose metabolism in brain regions related to attention and impulsivity
    • Low epinephrine and norepinephrine levels are linked to ADHD, affected by glucose intake
    • Glucose tolerance tests in ADHD children show irregular blood sugar levels leading to symptoms
    • ADHD children have a higher risk of obesity, possibly due to neurotransmitter imbalances
    • A steady and balanced supply of glucose is crucial for an ADHD child's brain

  • Webb Hints at Possible Atmosphere Surrounding Rocky Exoplanet

    4 hours ago
    • Atmospheric gases surrounding 55 Cancri e detected by NASA's James Webb Space Telescope
    • 55 Cancri e is a hot rocky exoplanet 41 light-years from Earth
    • The planet is classified as a super-Earth, larger than Earth but smaller than Neptune
    • High temperature close to its star likely results in a molten surface
    • Evidence of atmospheric gases confirmed using Webb's NIRCam and MIRI instruments
    • Gases likely bubbling out from the interior instead of being present since formation
    • Research aims to study rocky planet atmospheres and early planetary conditions
    • Infrared data suggests the presence of volatiles like carbon monoxide and dioxide
    • Potential insights into habitability conditions of rocky planets
    • Study conducted as part of Webb's General Observers (GO) Program 1952

  • CS388: Natural Language Processing

    6 hours ago
    • The course is on Natural Language Processing and the materials are for an online masters course
    • The lectures are available on YouTube
    • There are several assignments on different topics such as sentiment classification, neural networks, and transformer language modeling
    • The course covers topics like word embeddings, bias in word embeddings, and deep averaging networks
    • Structured prediction topics include part-of-speech tagging, syntactic parsing, and dependencies
    • Modern large language models like GPT-3 and zero/few-shot prompting are discussed
    • Explanations in NLP, including model interpretability and local explanations, are part of the course content
    • Several papers related to Natural Language Inference (NLI) explore different aspects of understanding text and generating explanations
    • Studies investigate the reliability and effectiveness of explanations in textual reasoning and word problem solving
    • Research on Question Answering (QA) covers topics such as machine comprehension, adversarial evaluation, open-domain QA, and multi-hop QA
    • Dialogue systems, including chatbots, are explored for task-oriented dialogues and context-sensitive responses
    • Machine Translation (MT) research delves into word alignment, neural models, and pre-trained approaches
    • Summarization research covers extractive and pre-trained methods for generating factual summaries
    • Multilingual studies include cross-lingual tagging, pre-training, and word embeddings for multilingual transfer learning
    • Language grounding research focuses on connecting language to real-world concepts and vision
    • Ethical considerations in Natural Language Processing (NLP) span areas like bias mitigation, exclusion, dangers of automation, and ethical use guidelines

  • The Ukraine war is driving rapid innovation in drone technology

    3 hours ago
    • The Ukraine war has driven rapid innovation in drone technology, especially in the field of drone improvements, counter-drone technology, and artificial intelligence
    • Ukrainian engineers and citizens are developing new drone technologies using affordable parts from various countries
    • Drones have changed the nature of the conflict, with inexpensive drones being able to destroy or disable costly Russian military vehicles
    • Funding for drone production is a challenge for Ukrainian manufacturers, impacting their production capabilities
    • The use of autonomous drones is increasing, with a focus on developing systems that can operate without human pilots
    • Autonomous drones could reduce friendly fire incidents and civilian casualties in warfare
    • The rapid pace of innovation in Ukraine is driven by the urgent need to counter a larger adversary and push the boundaries of drone technology
    • There are legal and moral implications of using autonomous drones for warfare, but the need to innovate and defeat the invading enemy is prioritized
    • The development of drone technology in Ukraine is crucial for the ongoing conflict and could shape future warfare

  • Google Photos testing 'Collections' redesign that buries your library

    4 hours ago
    • The Library tab on Google Photos for Android is being redesigned as 'Collections'.
    • Initial user reactions to the new UI design have been negative.
    • The top shortcuts for Favorites, Utilities, Archive, and Trash are retained in the Collections tab.
    • The 'Photos on device' carousel and cloud albums grid have been removed in the new design.
    • Automatically generated groupings include People, On this device, Albums, Documents, and Places.
    • Accessing local folders now requires opening 'On this device' to view a grid or list.
    • Accessing backed-up Albums now involves an additional step.
    • Google Photos has been working on revamping the Library since 2022.
    • The current design balance reflects user expectations for a library.
    • Auto-grouping albums are considered more suitable for functionality within the Search tab.

  • A San Francisco highway near Apple Park wasn't pretty enough, so it got deleted

    5 hours ago
    • Apple altered footage of San Francisco for 'Let Loose' event to create a prettier shot
    • Several parts of the Bay Area, including a highway near Apple Park, were digitally removed or altered
    • Local publication caught the deception, pointing out some inconsistencies in the footage
    • Despite the manipulation, Apple's video production was praised for its realism in some aspects
    • Viewers may have been deceived by the altered scenes, thinking they were real locations

  • Bitwarden transitions from Manifest v2 to v3

    9 hours ago
    • Bitwarden transitioned from Manifest v2 to v3
    • Manifest v3 introduced changes to browser extensions
    • New architecture required for supporting service workers and Manifest v3
    • Bitwarden developed a state framework to manage memory references
    • Data now stored in session storage (limited) and local storage (unlimited) for service workers
    • Local storage data is encrypted and security upheld
    • Feedback on Manifest v3 Chrome extension can be provided through Google form, GitHub, or Reddit thread

  • Show HN: Embeddable HNSW Library for Go

    13 hours ago
    • Package hnsw implements Hierarchical Navigable Small World graphs in Go
    • Allows for fast approximate nearest neighbor searches with high-dimensional vector data
    • Provides essential operations like Insert, Delete, Search, and Lookup
    • Performance optimization tips include reducing dimensionality of data, adjusting parameters like M and Ml
    • Excess memory usage can be tackled by reducing M and Ml, along with considering persistence/serialization
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