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  • git Note

    I’ve always trying to summarize an article of how to use git, but there has been a lot of resistance of doing so, one reason is that there are sufficient material that have enough info of how to use git. Although they provide a very detailed info regarding how to use git, I or beginners…

  • Mastering GNU Screen: The Ultimate Guide to Persistent SSH Sessions

    In the world of remote development and system administration, maintaining persistent sessions across SSH connections is crucial. Whether you’re running Claude Code for long AI-assisted coding sessions, managing servers, or simply want to pick up exactly where you left off after commuting from work to home, GNU Screen is your indispensable companion. Table of Contents…

  • Claude Code Cheat Code

    Default Options Variables Monitors

  • Proximal Policy Optimization Keynotes

    This post focuses on understanding proximal policy optimization, which is an on-policy policy gradient reinforcement learning algorithm. Clipping Clipped Surrogate Objective Plot1 There are 2 subfigures for this plot, illustrating 2 conditions where and , the case of is ignored as the clipping surrogate objective would be for both and The clipped surrogate objective function…

  • Fix Linux Preventing Remote SSH Root Login Issue

    This is a simple post that handles the issue of Please login as the user “rocky” rather than the user “root”. I have this problem on my Rocky Linux 9, it prevents me to login as root as I’ve already uploaded the public key to the server. So at the end of the ssh session…

  • Connected to Jim Keller

    In a surprising and truly exciting development, Jim Keller, the legendary “Silicon Sage” whose innovations have profoundly shaped the tech world, accepted my LinkedIn invitation this morning. What makes this particularly remarkable is that we’ve never actually met in person or professionally intersected in any way. It’s a testament to the open and interconnected nature of…

  • Note on NotebookLM

  • Virtuoso Annotation

    This post discusses briefly about annotation on schematics when simulation has been performed, it is not going to be a detailed summary but to get you started on annotation and ballons. Before going further, please make sure you know how to do a simulation prior to annotation configuration. In ADE Explorere’s schematic view, go to…

  • Gallery of LLM Prompts

    This post is going to explore a new way for blogging, by gathering tweets from X or Twitter that discuss a certain topic. I consider it as a note for me, you could utilize all those info on your workflow. You could click any of the tweet to go back to the original source.

  • Compilation of Virginia Tech Forms

    We’ve all been there. That sinking feeling when you realize you need a specific form from the university – a Plan of Study update, the dreaded Qualifying Exam application, a Change of Campus request, or perhaps a Graduate School petition. Your journey likely begins with a hopeful dive into the department website, only to be…

  • Open Online Office Docs with Desktop Apps

    This is a simple post that allows you to quickly open office documents including Word, Excel and Powerpoint that are currently opened with broswer using Desktop apps. It does not not involve any programming and fairly straightforward to do across Winindow and macOS. The reason to switch to Desktop apps could be that some functions…

  • Python Classes Interfaces

    In languages like Java, interfaces are a first-class construct. You define an interface, implement it in multiple classes, and swap those implementations in and out via configuration or dependency injection. Python doesn’t have a built-in interface keyword, but you can achieve the same clarity and safety using the abc (Abstract Base Classes) module. In this post, we’ll close that…

  • Farewell to Skype

    In May 2025, Microsoft is going to discontinue Skype which is an instant messaging app I use internally. Skype users will transfer to Microsoft’s new Teams app. To my surprise, it even has a font awesome icon. Currently, Skype takes 627.7 MB. Here are some more screenshots taken from a Mac. I’ve talked about Remote…

  • Rook2Vet4Word2Vec

    The goal of this blog is to help readers understand what word2vec means so that rookie like you could become a veteran on the concept of embeddings training process. I’ve tried to find resources to understand how word2vec actually works. What surprises me the most is that although it looks really simple in terms of…

  • Change of Campus Process @VT

    This is a simple post for Virginia Tech change of campus, yet the main focus is on changing campus within Virginia Tech in ECE department. For other department, you need to first contact assistant in the specific department. At the moment of initial publication, this is really sketchy, but I will refine this as the…

  • Who Touched My Mac’s Cam?

    Recently I found out that my Mac’s facetime cam was on occasionaly. That is quite confusing to me and I was trying to find out a reason to do so. Although I was not that cautious like Mark Zuckerberg who used a tape to block the laptop’s camera1, I don’t know if there are some…

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