Explains how computers work in a way that is easy for IT beginners to understand. Summarizes the basic knowledge you should know as IT fundamentals, from the roles of the 'five major components'—input, output, memory, control, and arithmetic—to the relationship between hardware and software (programs).
Carefully selected and introduced recommended iOS apps to utilize your iPhone and iPad more conveniently. Check out this collection of handy tools useful for work and private life, as well as essential apps that enrich your daily living.
Through the famous fable 'The Old Couple and the Donkey', we examine the negative effects of caring too much about others' eyes and the modern relationship dilemma of 'whose voice should we believe?'. We deliver hints for living a life unswayed by the opinions of others.
An introduction to an English documentary program explaining how difficult it was to realize blue LEDs. Touches upon the great achievement of the Japanese researchers who solved a problem thought impossible, and the gap in how it was evaluated domestically.
Introduces the installation steps for the 'Qt Extension Pack', an extension for developing Qt apps in VSCode (Visual Studio Code). Recommended for those who want to build a lightweight development environment as an alternative to Qt Creator.
We clearly explain the procedure to easily check from the settings screen whether your iPhone is SIM-locked or unlocked. Please refer to this when switching to a cheap SIM or purchasing a used device.
Provides an easy-to-understand overview of the biggest unsolved problem in computer science, the 'P≠NP conjecture', from the perspective of a deterministic Turing machine, incorporating the difference between 'Class P' (solvable in polynomial time) and 'Class NP' (solution validity can be verified in polynomial time).
A report on being re-awarded the Microsoft MVP (2024-2025) for the 8th time this year. Introduces the overview of the Microsoft MVP program, the evaluated activities, the reasons for this award, and a reflection on the past year.
An easy-to-understand guide on how to download and save high-quality YouTube videos, or extract and save them as mp3 audio files using the command-line tool 'yt-dlp'. Covers everything from installation to usage.
Introduces a compiled list of recommended short video links that trended on social media, including the touching episode of the ball boy who saved the team during a Tottenham match and was praised by Mourinho.
Introduces profound quotes by Einstein. Explains his teachings on believing in oneself and continuing to stand strong without being swayed by others' evaluations or criticism. Packed with hints that can be applied to modern daily life, such as at the workplace and on SNS.
We introduce a simple C language sample code that determines, generates, and lists prime numbers within a specified range (from 1 to n). We provide a programming implementation example and explanation easy for beginners to understand, using an efficient algorithm with an isPrime function.
Features the full text of Akiko Yosano's representative anti-war poem, 'Kimi Shinitamou Koto Nakare' (Thou Shalt Not Die), composed for her brother serving in the Siege of Port Arthur during the Russo-Japanese War. Deciphers the background and deep messages embedded in this masterpiece that appeals to family love and the preciousness of life.
We explain the life and masterpieces of Akiko Yosano, a poet active from the Meiji to Showa eras. We provide an easy-to-understand introduction to her achievements, including her debut poetry collection 'Midaregami', which passionately sang of women's romantic feelings, and the pacifist poem 'Thou Shalt Not Die', which criticized the Russo-Japanese War.
Explains the basic usage and calculation commands of Mathematica for beginners. Summarizes specific examples of frequently used functions such as solving equations and simultaneous equations (Solve), inequalities (Reduce), differentiation (D), integration (Integrate), and matrix calculations.
We introduce the CLI installation method for the fast static site generator Hugo, and a list of basic commands frequently used in blog operation. We explain the operations Hugo beginners should remember, such as launching a new site, creating articles, starting a local server, and building.
Introduces a list of recommended extensions that make Visual Studio Code (VSCode) even more convenient. We have carefully selected essential plugins that boost development efficiency, such as container management, Git code management, and AI code completion by Copilot.
An easy-to-understand explanation of the overview of the JavaScript library 'Mermaid.js', which allows drawing diagrams like flowcharts and Gantt charts using text, and the specific steps to introduce, configure, and make it usable in the static site generator Hugo.
We explain how to undo a reset and restore the original commit state when you accidentally execute 'git reset' in Git. We clearly introduce the procedure to check the commit ID using 'git reflog' and correctly revert the state.
Introduces the news that the source code of the OS 'MS-DOS 4.0', released about 40 years ago, has been open-sourced and published on GitHub. Explains this historical material, where most of the code is written in 8086 assembly.
