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From materials engineering to digital tools. A quiet space for making sense of things.

Changing Windows 11 Default Apps: Open PDFs, Photos, and Web Links in Your Preferred Apps
If PDFs launch an unexpected app or web links open an unfamiliar browser, inspect default-app settings. Windows 11

Showing File Extensions in Windows 11: Why Renaming Is Different from Conversion
Without .pdf, .jpg, or .txt at the end of filenames, similarly named files are hard to distinguish. Windows 11 can

Using Windows Clipboard History: Paste Previously Copied Content with Windows + V
If copying another sentence after an address lost the earlier content, try clipboard history. Windows + V opens rec

Using Windows 11 Snipping Tool: Capture Only What You Need and Save It as a File
Screenshots limited to relevant areas explain errors or settings more clearly than whole screens. Windows 11 Snippi

Reducing Windows 11 Startup Apps: How to Choose What to Disable
Messaging apps, game launchers, and cloud apps may all open when you start your PC. Windows 11 startup settings cho

When Windows 11’s C Drive Runs Low: A Cleanup Sequence to Check Before Deleting
If C-drive free space is falling, first identify what occupies it. Windows 11 Storage shows usage, and Cleanup reco

A Detailed Review of PickIt: A Site I Might Often Use When I Cannot Decide
Summary I tried PickIt for small but frequent dilemmas such as choosing food or presentation order. The site helps

What Is Brittleness? Differences from Toughness and Ductility, and Interpreting Charpy Tests
Brittleness means little plastic deformation before fracture; toughness is the ability to absorb energy until fract

Material Strength and Hardness: Differences and Measurement Methods
In materials and mechanical engineering, strength and hardness are among the most important physical properties and

Evaluating Material Ductility and Brittleness: An In-Depth Look at Tensile and Impact Tests
1. Introduction Material ductility and brittleness are important mechanical properties in engineering design and pr

Stress Versus Strain: Engineering Concepts Explained Simply
When studying or working in materials and mechanical engineering, you often hear the terms “ stress ” and “ strain

Hiding the Windows 11 and 10 Taskbar: Auto-Hide Settings and Shortcuts
To hide the Windows taskbar, enable “Automatically hide the taskbar.” Change it under Taskbar behaviors in Windows

The Feynman Technique: A Method for Learning Concepts
The Feynman technique is a learning method used by Nobel Prize-winning physicist Richard Feynman, aiming for genuin

Is It Really Easier to Wake Up After Sleeping in 90-Minute Intervals?
Sleep information, YouTube videos, and blog posts often say, “Sleep has REM, ordinary, and deep stages that repeat,

The PARA Method: Organizing Your Notes
The PARA Method Developed by Tiago Forte, this personal knowledge-management system effectively classifies and orga

Atomic Structure of Materials and Atomic Bonding in Solids
1. Atomic Structure All matter consists of atoms, the basic units making everything around us, like Lego blocks. Th

Mechanics of Materials (Solid Mechanics): Poisson’s Ratio
Definition A dimensionless ratio of transverse strain to axial strain when a material is linearly elastic. Symbol:

The Third Law of Thermodynamics: Absolute Zero
Today I will discuss the third law of thermodynamics, which concerns absolute zero. What Is the Third Law? Simply p

Elasticity Versus Plasticity: Recovery, Yielding, and Calculating Residual Deformation
The difference between elasticity and plasticity is whether deformation remains after unloading. Elastic deformatio

Ductility Versus Brittleness: Meaning, Material Examples, and Stress–Strain Curves
Ductility and brittleness differ in the amount of plastic deformation before fracture. Ductile materials undergo re

[Everyday Knowledge] Understanding the Differences Between Influenza A and B
In winter, we often hear a great deal about influenza. “Flu” generally includes influenza A and B, whose viruses ha

Small Python Project 1: Making an Escape-Room Game
An Escape-Room Game in Python Hello. Let's make a simple escape-room game using Python. The rules are simple: disco

Force, Stress, and Strain
- Internal Force: When an external force is applied to an object, deformation and resistance occur simultaneously,

College Physics (Engineering Physics) #004: Instantaneous Velocity and Acceleration
What Is Instantaneous Velocity? ? ' Instantaneous velocity ' indicates an object's velocity at a particular instant