AI 资讯
Keeping background services alive: Lessons from building Muffle
Opening hook It happened during a quiet afternoon at the mosque. The imam was mid-sentence when a rhythmic, high-pitched ringtone cut through the silence like a knife. Every head turned. It was my phone. My heart sank as I scrambled to silence it, only to realize I had forgotten to flip the physical toggle before walking in. That moment of collective, disappointed glares burned. It wasn't just an annoyance; it was a total breakdown of my focus and a social failure I had accidentally caused because my phone couldn't manage itself. The problem We live in an era where our devices are supposedly 'smart,' yet they are remarkably bad at knowing when to keep quiet. We carry computers in our pockets that can calculate the exact position of the moon or stream 4K video, but they cannot inherently tell that we are in a meeting, a lecture, or a place of worship. You could argue that setting a manual schedule works, but life isn't static. Meetings run over, prayer times shift by a minute each day based on astronomical calculations, and spontaneous plans happen. I found myself constantly juggling the physical volume buttons. If I remembered to mute it, I inevitably forgot to unmute it afterward, missing urgent calls from family. If I didn't mute it, I was the person disrupting the room. I wanted a solution that respected the context of my location and the specific time of day without requiring me to touch my screen. The core friction is that Android is designed to restrict background processes to save battery, which is exactly what a silent-automation app needs to thrive. Getting the app to reliably trigger a volume change while the phone is sitting in a pocket, deep in Doze mode, became my primary development hurdle. The technical decision / implementation When I started building Muffle, I initially tried a standard Service with a Handler loop to check conditions. It worked fine while the screen was on, but as soon as the phone entered Doze mode, the OS aggressively throttled my
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html.contact
A full form backend you can test before paying Discussion | Link
开发者
Mexico’s Victory Over Ecuador Made the Ground Shake. Was It an Artificial Earthquake?
Fans’ euphoric reactions to the Mexican national team’s recent victory in the 2026 World Cup caused a series of unusual vibrations that were detected by seismic warning systems.
AI 资讯
Logistic Regression (Supervised Family)
1. The Problem It Solves Logistic Regression is used when the outcome is a category rather than a number . Most commonly, it's used for binary classification , where the answer is either Yes or No , True or False , or 1 or 0 . Typical business problems include: Will a customer churn? Is this transaction fraudulent? Will a customer click an ad? Will a loan default? Is an email spam? Will a machine fail in the next 24 hours? Unlike Linear Regression, we're not trying to predict a continuous value. Instead, we're predicting the probability that an event belongs to a particular class. For example: A customer may have an 82% probability of churning . The business can then decide whether that probability is high enough to trigger an intervention. 2. Core Intuition Imagine you're trying to predict whether a customer will cancel their subscription. Suppose the only feature you have is how many times they opened your app this month. If you use a straight line like Linear Regression, the predictions quickly become unrealistic. A very active customer might end up with a -20% chance of churn . A completely inactive customer could end up with 140% . Probabilities obviously can't work like that. To fix this, Logistic Regression takes the linear equation and passes it through a mathematical function called the Sigmoid Function . Instead of producing a straight line, it creates an S-shaped curve . No matter how large or small the input becomes, the output always stays between 0 and 1 . That makes it perfect for probability estimation. 3. The Mathematical Model The model first calculates a linear score. Instead of using that score directly, it passes it through the Sigmoid function. Where: z = linear score p̂ = predicted probability The final output is always between 0 and 1 . For example: 0.08 → Very unlikely 0.32 → Low risk 0.65 → Moderate risk 0.94 → Very high probability Businesses can then choose a decision threshold. For example: Probability ≥ 0.50 → Predict Churn Probability
AI 资讯
The Markdown File That Beat a $50M Vector Database: Separating Storage and Search in Agent Memory
In the rush to build AI agents, we defaulted to complex vector databases. But high-traffic platforms are converging on a simpler, more robust foundation: plain files. Most long-term agent memory setups are massively over-engineered. When developers start building LLM applications, the default prescription is almost always: "Spin up a managed vector database and build a RAG pipeline." But if you look at the highest-traffic production agent platforms (like Claude Code, Manus, and OpenClaw), a quieter trend has emerged. They are bypassing the enterprise embeddings store and using plain markdown files as their primary memory substrate. This is not a regression to simplicity. Done well, it is a stronger engineering foundation because files are inspectable, diffable, portable, and git-native. But a folder of plain text notes with no structure is just a slow, poorly indexing database. To make a file-first architecture work at scale, you must follow a fundamental system design principle: separate storage from search . The Core Invariant: Storage vs. Search The single highest-leverage decision you can make in agent memory design is treating your storage layer and search indexes as completely separate systems. Storage (Canonical Source of Truth): Versioned, human-readable files (Markdown + YAML frontmatter). Search (Derived Index): Derived search structures (vector databases, full-text BM25 indexes, entity graphs, keyword indexes). In this architecture, every search index is treated as a disposable artifact. You can delete your vector embeddings database or rebuild your entity graph at any time, with zero loss of underlying memory. This buys you three advantages: Auditability for free: By storing memories in text files, you can version-control them using Git. Every memory update, supersession, or correction is diffable, attributable, and reversible without any custom database versioning logic. Algorithmic freedom: Swap your embedding models, adjust your chunking strategies, o
产品设计
T-Mobile moving tens of thousands of virtual machines off VMware amid lawsuit
T-Mobile wants Broadcom to keep supporting its VMware perpetual licenses.
AI 资讯
Xbox’s ‘reset’: all the news about Microsoft’s looming layoffs and studio closures
Xbox is making some big changes — again. On June 10th, a few months after Asha Sharma took over as CEO, she and newly-promoted chief content officer Matt Booty sent a memo to staff warning of an “Xbox reset.” The business, they said, is facing significant challenges, including a 3 percent “accountability margin,” massively higher […]
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Apple's Hide My Email may not be hiding anything
A vulnerability can reportedly connect real email addresses to anonymous ones.
AI 资讯
AI For Test Generation: Where It Helps And Where It Lies
AI is great at writing tests fast, and good at writing tests that look real but verify the wrong...
AI 资讯
AI For Test Generation: Where It Helps And Where It Lies
AI is great at writing tests fast, and good at writing tests that look real but verify the wrong...
产品设计
Universal-3.5 Pro
Native code switching, better diarization, more languages. Discussion | Link
开发者
Goose, a New Gay Dating App, Appears to Be a Psyop
Touted as a less-hookup-focused Grindr, Goose is an invite-only space for gay men. The problem is the people promoting it don’t seem real.
AI 资讯
PieterPost MCP
Connect your AI agent to postal mail Discussion | Link
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Human Checkpoint
Preserving authentic organic posting since the collapse. Discussion | Link
AI 资讯
NASA chief praises progress Blue Origin is making after launch failure
"We've got time into 2027 before we're getting nervous."
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An Explosion Knocked Out Anduril’s Rocket Motor Test Site in Mississippi
The incident could disrupt a key part of the defense company’s rocket motor business, which designs and tests prototype motors for military customers.
AI 资讯
US home battery installations hit record high on rising electricity costs
Record home battery installations unlock options for grids—and AI data centers.
开发者
Meta is reportedly building its own cloud business
Selling server infrastructure would put Meta in competition with Amazon and Google.
产品设计
PixFit
Turn 1 creative into every ad format, instantly Discussion | Link
AI 资讯
Superworms could replace beetles for cleaning skeletal remains
An optimal ratio of 10-15 grams of larvae per gram of specimen minimized cleaning time with no bone damage.