Engineer Examines Real Circuit Boards from Space Shuttle's I/O Processor

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A detailed technical analysis of circuit boards recovered from the Space Shuttle's Input/Output Processor has been published on the blog righto.com. The examination explores the hardware design and components used in one of the shuttle's critical computing systems. The I/O Processor played a key role in managing data communication between the shuttle's various systems. The post offers a hands-on look at the engineering behind NASA's iconic spacecraft, appealing to both electronics enthusiasts and space history fans.

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5 Essential Linux Commands for Cybersecurity Students

CS student Ayesha Abbas highlights five Linux commands she considers fundamental for cybersecurity learners. The commands covered are netstat and ss for monitoring network connections and open ports, grep for searching patterns within files such as logs, chmod for managing file permissions, and nmap for scanning networks and identifying open ports. Each command is paired with a practical example, such as using grep to search log files for sensitive strings or chmod to restrict SSH key access to the file owner. Abbas notes that nmap should only be used on networks the user owns or has explicit permission to scan. She describes these tools as a starting point for those studying Linux and networking full time.

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Developer Builds AI Tool Using 107 USCIS Appeal Decisions to Aid Visa Applicants

A developer is building PetitionIQ, an AI-powered immigration case preparation platform aimed at reducing reliance on attorneys who charge $5,000–$15,000 per case. The tool uses a retrieval-augmented generation (RAG) pipeline trained on 107 real USCIS Administrative Appeals Office (AAO) non-precedent decisions spanning four visa categories, including EB-1A and EB-2 NIW. Because AAO decisions only cover denied-then-appealed cases, the corpus is inherently biased toward rejection, so the system avoids outputting approval probabilities and instead uses strength indicators with cited decisions. Every response includes a disclosure about the corpus bias, a deliberate design choice the developer frames as an ethical necessity for legal AI. The project comes amid rising USCIS denial rates, with EB-1A rejections reportedly climbing from 25.6% to 46.6% and NIW denials reaching 64.3% in recent data.

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ProgrammingDEV Community ·

Prompt Injection Explained: The LLM Security Flaw That Needs Words, Not Hacks

Prompt injection is a security vulnerability in AI-powered applications where untrusted text embedded in a prompt can override a developer's intended instructions, effectively turning user input into executable commands. Unlike traditional hacks, it requires no code exploits — just carefully crafted natural language, as demonstrated when a chatbot was manipulated into offering a car for $1 and Microsoft's Bing Chat revealed its internal codename 'Sydney.' The flaw exists because large language models cannot inherently distinguish between a developer's system prompt and user-supplied text, treating both as equal input. Prompt injection differs from jailbreaking in that it targets the application's architecture rather than the model's safety filters, making even a 'safe' model vulnerable if the surrounding system is poorly designed. It has ranked first on the OWASP Top 10 for LLM Applications, with attack variants including direct chat manipulation, indirect payloads hidden in fetched documents, and multimodal instructions concealed within images or audio.

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Developer Builds Real-Time Whale Tracker for Polymarket Using Public API Data

A developer built WhaleTrack, a real-time trading tracker for Polymarket, a prediction market platform that recently surpassed $3.6 billion in total volume. The tool uses Polymarket's public API to pull the top 10 traders by profit and loss from the platform's leaderboard and monitor their recent activity. Trade data, including market name, size in USDC, and timestamp, refreshes every 60 seconds to create a live activity feed. A whale alert banner triggers automatically when a large trade is detected, displaying the trader's name, market, and bet size before auto-dismissing after 12 seconds. The project was completed over a single weekend and the developer has shared it publicly, inviting community feedback.

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