Physics
The Secret of Floating Iron Ships: Archimedes' Principle
An object in a fluid is buoyed up by the weight of the fluid it displaces. This piece explains Archimedes’ principle, why buoyancy comes from pressure differences with depth, when
Articles to explore
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732 articles found
Logistics
The Way Back Is Logistics Too: Reverse Logistics
Returns, recalls, reusable crates, and recycling all flow in the opposite direction from ordinary shipping. This piece explains what reverse logistics covers, the collection–inspec
Library & information science
What You Found and What You Missed: Precision and Recall
When a search list looks right at the top, how do you know what was left out? This piece explains precision and recall, the trade-off between them, the F1 score that combines both,
Robotics
Drawing the Unknown on Its Own: Simultaneous Localization and Mapping (SLAM)
How does a robot with no map work out both its surroundings and its own position? This piece explains SLAM: the chicken-and-egg problem behind it, its roots in the 1986 IEEE roboti
Design
If It Looks Good, It Feels Easy: The Aesthetic-Usability Effect
Why do people assume a prettier app is easier to use before they try it? This piece explains the aesthetic-usability effect through Kurosu and Kashimura’s 1995 ATM study, Tractinsk
Education
Why Is One-to-One Teaching So Powerful? Bloom’s 2 Sigma Problem
Why did students tutored one-to-one outscore 98% of an ordinary class? This piece explains Bloom’s 2 sigma problem: the three teaching methods Bloom compared in 1984, what standard
Tourism studies
Where Does Tourists’ Money Go? Tourism Leakage
Why does so little of what tourists spend reach local fishermen and neighborhood restaurants? This piece explains tourism leakage: how tourism revenue reaches the local economy, im
Economics
Does Destruction Revive the Economy? The Broken Window Fallacy
Can rebuilding after a disaster or war really make a society richer? This piece explains the broken window fallacy through Frédéric Bastiat’s 1850 parable of the seen and the unsee
Business administration
The Hidden Price of Changing: Switching Costs
Why is it so hard to switch carriers, airlines, or software even when a cheaper option exists? This piece explains switching costs, the three types identified by Burnham, Frels, an
Chemistry
The Hill Every Reaction Must Climb: Activation Energy
Why don’t books on a shelf catch fire by themselves? Reactions must first climb an energy hill called activation energy. This piece covers the Arrhenius equation, why heat speeds r
Statistics
Why Great Days Are Often Followed by Ordinary Ones: Regression Toward the Mean
After a standout exam or a praised flight, the next result often looks weaker—and after a flop, stronger. Much of that swing is regression toward the mean, not praise or blame. Thi
Earth science
Less Rain Beyond the Mountains: The Rain Shadow Effect
Why is one side of a mountain range lush and the other dry? Moist air rises up the windward slope and drops its rain, then sinks, warms, and dries on the leeward side. This piece c