AI 资讯
What Does the Windows REFRESH button really do?
Hello, I'm Maneshwar. I'm building git-lrc, a Micro AI code reviewer that runs on every commit. It is free and source-available on Github. Star git-lrc to help devs discover the project. Do give it a try and share your feedback. I boot up my machine. The desktop loads. And before I open my editor, before I check Slack, before I do a single productive thing, I right-click an empty patch of desktop and hit Refresh . Then I do it again. And again. I am a person who can explain event loops and reason about cache invalidation, and yet here I am, mashing F5 on a static wallpaper like it owes me money. If you've never done this, congratulations, you're better than me. If you have ... welcome. You're among friends. First, let's kill the myth There's a folk belief that refreshing the desktop is a tiny act of system maintenance. A little spring cleaning. A gift to your hardworking CPU. It is not. Manually refreshing your desktop does not : free up RAM reduce CPU load clear some mysterious cache make your PC faster in any way, shape, or form All it does is tell Windows Explorer to redraw the current view . That's it. That's the whole feature. What's actually happening under the hood Here's the part that's actually interesting (we're devs, we live for the "actually"). Windows doesn't repaint your entire screen on every frame, that would be wildly wasteful. Instead it leans on a composition engine that, with help from your GPU when one's available, only redraws the regions that changed since the last frame. Already drawn elements get cached and reused. Icons, the taskbar, your wallpaper they're all mostly static, so mostly left alone. When something genuinely changes (you save a file, delete a folder, plug in a drive), the OS detects it and tells the composition engine: "hey, this little rectangle changed, repaint just that." The desktop refreshes itself, automatically, all day long, without you ever touching anything. So the manual Refresh button is really just a manual overrid
开发者
String Methods, Conditional Statements (if/elif/else), Loops (for, range())
🐍 Python for DevOps — Class 5 Notes Topic: String Methods, Conditional Statements ( if/elif/else ), Loops ( for , range() ) 📌 Key Concepts Overview Concept One-Line Definition String Methods Built-in functions to inspect and transform strings if / elif / else Execute code blocks based on conditions for loop Iterate over any iterable — string, list, range, dict range() Generate a sequence of numbers to loop over Nested if An if block inside another if block Nested for A for loop inside another for loop 🔤 Part 1 — String Methods (Continuation from Class 4) Checking String Case # islower() — True if ALL characters are lowercase ' devops ' . islower () # True ' Devops ' . islower () # False # isupper() — True if ALL characters are uppercase ' DEVOPS ' . isupper () # True ' Devops ' . isupper () # False # Practical: normalize before comparing env = input ( ' Enter environment: ' ) if env . lower () == ' production ' : print ( ' ⚠️ Deploying to PROD! ' ) Checking Digit / Numeric Strings Method Accepts Rejects DevOps Use isdecimal() 0-9 only decimals, superscripts Port validation isdigit() 0-9 + superscripts decimal points Version numbers isnumeric() 0-9 + superscripts + fractions decimal points Broadest check # Key difference — decimal point breaks all three ' 8080 ' . isdecimal () # True ' 8080 ' . isdigit () # True ' 8080 ' . isnumeric () # True ' 80.80 ' . isdecimal () # False — dot is not a digit ' 80.80 ' . isdigit () # False ' 80.80 ' . isnumeric () # False # DevOps use: validate user input before casting port_input = input ( ' Enter port: ' ) if port_input . isdecimal (): port = int ( port_input ) else : print ( ' ❌ Invalid port — must be a whole number ' ) replace() — Find and Replace in Strings # str.replace('old', 'new') ' Python ' . replace ( ' P ' , ' J ' ) # 'Jython' ' prod-server-01 ' . replace ( ' - ' , ' _ ' ) # 'prod_server_01' ' This is python class ' . replace ( ' i ' , ' a ' ) # 'Thas as python class' — ALL occurrences # DevOps: sanitize strings for us
AI 资讯
Millions Spent on Security Tools. Zero Spent on Asking the Right Questions.
There is a comfortable lie that has taken root in information security domain. It goes like this: "We have invested in the best tools. We have CSPM. We have CNAPP. We have ASM, ASPM, EDR, SIEM. We are covered." Boards believe it. CISOs present it. Security budgets are built around it. And while everyone is looking at dashboards full of green, two things are quietly true: One — attackers are not trying to beat your tools. They are looking for what your tools were never designed to see. Two — the most dangerous gaps in your security posture today are not gaps in your tooling budget. They are gaps in visibility, knowledge, and the fundamental understanding of what your own systems are supposed to do — and whether they actually do it. No tool solves that. Only people do. The Tool Trap The security industry has industrialized the idea that protection is a purchasing decision. Spend enough. Deploy enough. Integrate enough. And you will be secure. This thinking has produced something genuinely useful — a generation of powerful tools that automate detection, surface known misconfigurations, and reduce the manual burden on security teams. CSPM catches publicly exposed storage buckets. EDR detects malware. SIEM correlates suspicious behavior across logs. These tools matter and they work — within the boundaries of what they were designed to see. But there is a boundary. And most organizations have no idea where it is. The boundary is this: every security tool operates on known patterns, defined rules, and observable configuration state. None of them operate on context. None of them understand intent. And intent — what a system was supposed to do, how it was supposed to be accessed, what data it was never supposed to expose — is exactly where the most dangerous vulnerabilities live today. The Dangerous Gap Nobody Has Named Yet Security practitioners are familiar with the concept of IoM — Indicator of Misconfiguration. A wrong setting. An overpermissioned role. A flag that flipp
AI 资讯
How email verification works: syntax, MX, and SMTP explained
"Email verification" sounds like one thing, but it's really a stack of checks of increasing depth and cost. Knowing what each layer actually proves helps you pick the right level instead of overpaying for verification you don't need. Layer 1: syntax The cheapest check: does the string look like a valid email address? A pragmatic regex catches obvious garbage ( asdf , a@@b , trailing spaces). It's instant and free, but weak on its own: nobody@asdf.asdf passes syntax and can't receive a single message. Layer 2: domain and MX records Next, does the domain actually accept mail? Every domain that receives email publishes MX (mail exchanger) records in DNS pointing to its mail servers. A quick DNS lookup tells you whether any exist. No MX (and no fallback A record) means the domain can't receive mail, so the address is undeliverable no matter how it's spelled. This single step removes a large class of fakes and dead domains. Layer 3: SMTP mailbox check The deepest level connects to the domain's mail server and begins the motions of sending a message to ask whether that specific mailbox exists, without actually delivering anything. It's the only layer that can hint a particular inbox is real, but it comes with real caveats: It's slow (a live connection per address). Many servers are "accept-all" and say yes to everything, so the answer is often meaningless. Lots of providers block or throttle these probes, and outbound port 25 is blocked on most modern hosting, so it's frequently unavailable anyway. SMTP checks matter most for cleaning old, cold lists, and far less for stopping junk at signup. The heuristics layer Alongside those, useful verification adds signal that has nothing to do with deliverability per se: Disposable detection: is it a throwaway provider? Role detection: is it info@ or admin@ rather than a person? Typo suggestions: "did you mean gmail.com?" for gmial.com . A deliverability score: one 0–100 number that rolls it all up so you can just threshold on it.
AI 资讯
A prosthetic hand is now teaching an industrial robot & PepsiCo signed for autonomous freight. Here's what you missed this week.
PSYONIC's prosthetic touch data is now training ABB robots. Gatik signed the first Fortune 50 commercial autonomous freight contract with PepsiCo. Burro drove Physical AI onto the construction site. Experts set $20k as the humanoid price target. And someone just called Edge AI the Windows of robotics. This week, Physical AI crossed three invisible lines at once. A company that makes prosthetic hands figured out that the touch data from amputees is exactly what industrial robots need to learn how to grip. A Fortune 50 company signed not a pilot but a commercial contract for autonomous freight. A 44-horsepower robot drove off the warehouse floor and onto the construction site. And two separate conversations about software and pricing suggest that the next wave of robotics adoption will be driven by access, not capability. Here is what happened, and why it matters beyond the headlines. Value Description Fortune 50 PepsiCo becomes first to sign a commercial contract for autonomous freight with Gatik $20k Target price point for humanoid robots, Robotics Summit consensus: achievable by 2028–2030 1M hours Burro's field experience backing the Grande 44 autonomous outdoor platform 100+ Pressure sensors per fingertip in PSYONIC's Ability Hand, now training ABB GoFa A Prosthetic Hand Is Now Teaching an Industrial Robot How to Grip The standard approach to teaching a robot how to handle objects has been simulation, teleoperation, or labor-intensive physical demonstrations. PSYONIC and ABB just introduced a different source of data : the hands of people who have already learned to feel again. PSYONIC's Ability Hand is a prosthetic with more than 100 pressure sensors per fingertip . The company has been collecting kinesthetic data from users with upper-limb amputations. That data, which captures how a human hand adjusts grip pressure, contact area, and force across thousands of everyday tasks, is now being fed as training data into ABB GoFa robot arm models. The implication is no
AI 资讯
How I Cut My Multimodal AI Costs by 97% — A Freelancer's Guide
How I Cut My Multimodal AI Costs by 97% — A Freelancer's Guide Last month I almost killed a side gig because of a single line item on an invoice. A client wanted me to build a document-processing tool that could read scanned PDFs, pull text out of photos, and answer questions about charts. Easy enough — except I'd quoted the job assuming I'd use GPT-4o for the vision work. When I actually ran the numbers, I realized the API bill would eat my entire margin. I'd be working for free. Maybe worse. So I did what every freelancer does when the big-name vendor gets too expensive: I went hunting. And I landed on Global API, which routes to a bunch of multimodal models I've honestly never heard clients talk about. After a few weeks of testing, I figured out which ones are worth my billable hours and which ones aren't. This is everything I learned, plus the exact code I'm shipping to clients. Why Multimodal Even Matters for Solo Devs Two years ago, "multimodal" was a buzzword you'd hear at conferences. In 2026 it's table stakes. I've personally used vision models to: OCR receipts for an expense-tracking app (boring but pays the rent) Convert screenshots of legacy code into editable source for a Y2K-era company migration Read bar charts from PDF reports for a finance client who hates spreadsheets Analyze medical imaging samples for a startup MVP (this one was scary) Every one of those jobs started as a quick conversation with a prospect and turned into real invoices because I could say yes. The bottleneck was never capability — it was always cost. When GPT-4o charges north of $10/M output tokens, a single 2,000-token response on a tricky chart costs me about two cents. Multiply by 10,000 images per month and you've got a $200 API line item before you've paid yourself. That's a problem when the whole job is worth $400. So I tested every multimodal model I could find on Global API. Here's the lineup I ended up evaluating. The Contenders Nine models, three providers, one freelanc
开发者
Prediction Market Philosophers Got What They Wanted. They’re Not Happy About It
Getting the future right is now big business. But at a festival in Berkeley, forecasters worry that sports markets could take the whole industry down.
AI 资讯
An Open Strait of Hormuz Won’t Fix Gas Prices Overnight
Even if peace holds up between the US and Iran, oil prices aren’t going back down to where they were any time soon.
AI 资讯
The inevitable weakness of metrics
There are plenty of useful things a metric can reveal. There are even more it can obscure or corrupt. It took me well over a decade of tracking my own life in ever greater detail to fully appreciate this duality, which probably reveals something about both me and the nature of measurement. Like a lot…
AI 资讯
Brain-computer interface trials are taking off
This week, I covered the story of Casey Harrell—a man with ALS who is “the first power user” of a brain implant, according to the researchers who worked with him. Harrell is paralyzed and unable to speak coherently without the device. He has now spent almost three years using a brain-computer interface (BCI) that enables…
AI 资讯
Article: Designing Continuous Authorization for Sensitive Cloud Systems
Most cloud systems make one authorization decision at login. Everything after runs on trust established at authentication time. For systems handling regulated data, that gap is where breaches happen. This article presents a continuous authorization architecture covering risk-tiered evaluation, behavioral baselines, privacy-preserving audit trails, and a phased and incremental rollout. By Venkata Nedunoori
AI 资讯
Canada Missed Chances to Inspect Titan Before Fatal Implosion
A new report shows that government agencies failed to communicate and includes recommendations for stronger oversight in a bid to avert future disasters.
产品设计
Azure Functions Ships Serverless Agents Runtime at Build 2026
Azure Functions shipped a serverless agents runtime in public preview at Build 2026. Agents are defined in .agent.md markdown files with YAML triggers, MCP server access, 1,400+ connectors, and sandboxed execution. The Functions team confirmed to InfoQ that the runtime adds no cold start overhead and no billing premium beyond standard Flex Consumption. By Steef-Jan Wiggers
AI 资讯
Windows Platform Security and the Race to Secure AI Agents
In a new Windows Developer Blog post titled "Windows platform security for AI agents", Microsoft positions Windows as the trustworthy operating system for autonomous agents and introduces the Microsoft Execution Containers (MXC) SDK as the core of that strategy. The post argues that containment, identity and manageability must be built into the operating system. By Matt Saunders
AI 资讯
GitLab 19.0 Embeds Agentic AI in Secrets, Merge Requests, and Supply Chain Security
GitLab 19.0 extends agentic AI beyond code generation into securing credentials, reviewing and merging changes, and scanning dependencies, adding a public beta Secrets Manager, a full merge request Developer Flow, usage-based GitLab Duo billing, and generally available SBOM dependency scanning. By Mark Silvester
产品设计
.NET 11 Preview 5: Brings File-Based App Improvements, New C# Features, and a Blazor Validation Wave
Microsoft has released the fifth preview of .NET 11, with updates across the SDK, C#, ASP.NET Core, .NET MAUI, and EF Core. Highlights include file-based app improvements, new C# closed classes and unions, a Blazor validation wave, a large MAUI reliability rollup, and SQL Server 2022 as the default EF Core compatibility level. By Almir Vuk
产品设计
Prospector by Synter
Your outbound agent, right inside Slack Discussion | Link
AI 资讯
Pseudoscientific Cancer ‘Treatment’ Involves Gassing Naked People in Plastic Bags With Bleach
A London clinic owner has claimed he is treating people with stage 4 cancer by sealing them into a plastic bag while they're naked from the waist down and gassing them with chlorine dioxide.
AI 资讯
Why Taking Feedback Positively Can Transform Your Career as a Developer
Why Taking Feedback Positively Can Change Your Career As developers, engineers, designers, and professionals, we all want to improve. We spend countless hours learning new technologies, building projects, and gaining experience. Yet many people overlook one of the most powerful tools for growth: feedback. Unfortunately, feedback often feels personal. When someone points out mistakes in our code, resume, communication, or project, our first reaction is sometimes defensive. We feel offended, frustrated, or misunderstood. I've experienced this myself. But over time, I learned that the ability to accept feedback positively is one of the most valuable skills anyone can develop. Feedback Is Not an Attack One of the biggest misconceptions is believing that criticism is an attack on our abilities. When a senior engineer reviews your code and suggests improvements, they are not saying you're a bad developer. When a recruiter rejects your resume, they are not saying you're incapable. When users report problems in your open-source project, they are not trying to discourage you. Most of the time, people are simply showing you where improvements can be made. The sooner we separate our ego from our work, the faster we grow. Every Rejection Contains Information Many professionals view rejection as failure. I view it differently now. A rejection is data. If ten companies reject the same resume, the market is telling you something. If users consistently struggle with a feature, they're revealing a usability problem. If interviewers repeatedly point out the same weakness, they're highlighting a skill gap. The goal isn't to feel bad about the feedback. The goal is to learn from the information hidden inside it. Growth Begins Where Comfort Ends Positive feedback feels good. Constructive feedback creates growth. Nobody enjoys hearing that their architecture can be improved, their communication needs work, or their project has flaws. But those uncomfortable conversations often lead to th
AI 资讯
# Building an AI-Powered Carbon Footprint Awareness Platform with Flask, SQLite, and Groq (Llama 3.1)
🌿 Introduction As climate awareness grows, individuals are looking for actionable ways to reduce their personal carbon footprints. However, most carbon calculators are either too complex or offer generic, unhelpful advice. To solve this, I built CarbonWise —a production-ready Carbon Footprint Awareness Platform. It combines deterministic scientific carbon calculations with real-time, personalized AI reduction strategies using the Groq LLM API. Here is a technical deep-dive into how I built, secured, and optimized this application for the PromptWars: Virtual challenge. 🏗️ Architecture & System Design The application is designed to be lightweight, secure, and highly performant, avoiding heavy framework overhead. System Data Flow ┌──────────────────────────────────────────────────────────┐ │ User Browser │ └─────────────┬──────────────────────────────▲─────────────┘ │ HTTPS (POST / GET) │ Rendered HTML/CSS ┌─────────────▼──────────────────────────────┴─────────────┐ │ Flask App (app.py) │ └─────────────┬──────────────┬───────────────▲─────────────┘ │ │ │ ┌─────────────▼──────────┐ ┌─▼─────────────┐ │ │ SQLite DB (carbon.db) │ │Secure Session │ │ │ - Users & Logs │ │ Cookies │ │ │ - WAL Mode Enabled │ └───────────────┘ │ └────────────────────────┘ │ Structured JSON Insights ┌────────────────────────────────────────────┴─────────────┐ │ Groq API (Llama 3.1) │ │ - Model: llama-3.1-8b-instant │ └──────────────────────────────────────────────────────────┘ Backend : Flask (Python) handles routing, user session state, and database operations. Database : SQLite manages users and logs. We activated WAL (Write-Ahead Logging) mode to enable concurrent reads and writes. AI Engine : Connects to the Groq API using the ultra-fast Meta Llama 3.1 8B model ( llama-3.1-8b-instant ). Frontend : Rendered server-side with Jinja2 templates and styled with a custom dark-mode glassmorphism design system in Vanilla CSS. ⚙️ Feature Deep-Dive 1. Deterministic Carbon Calculations ( carbon_engine.p