Statistics
How Often Do Rare Events Happen: Poisson Distribution
Why do call-center phones arrive in uneven bursts even when the average is steady? This article walks through the Poisson distribution—from its single-parameter formula and conditi
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810 articles found
Design
The Bigger the Target, the Faster You Reach It: Fitts's Law
You have probably tried to tap a small close button on your phone screen and ended up tapping an unintended ad. By contrast, the large payment button at the bottom of the screen is
Education
What Is Educational Technology, How Is It Classified, and What Are Its Prospects?
Education is a powerful means of changing the world and plays a central role in the development of our society and the renewal of culture. One way to deliver this education more ef
Robotics
Reaching Out a Hand from Afar: Teleoperation
Teleoperation lets a person control a distant machine directly, sending their hands and eyes where people cannot safely go. This article covers its origins in 1940s–50s nuclear lab
Robotics
Smarter Together Than Alone: Swarm Robotics
Swarm robotics is the field of robotics that designs many simple robots to work together without a central leader, using only signals exchanged with nearby peers. This piece covers
Journalism & communication
The Functions and Roles of the Press: Its Core Roles and Importance in Society
What does the press actually do for society? This article explains the main functions of the press, from providing information, acting as a watchdog, and shaping public opinion to
Chemistry
Oil That Washes Away Oil: Saponification
Saponification is the chemical reaction in which fats and oils react with an alkali to become soap and glycerol. This article covers how the reaction works, why soap removes grease
Social welfare
Introduction to the National Basic Livelihood Security System: Recipient Eligibility and Benefits
South Korea operates the National Basic Livelihood Security System to ensure that all citizens can live with dignity. The National Basic Livelihood Security System is a social safe
Statistics
Nonparametric Statistical Methods: Effective Use and Essential Considerations
Nonparametric statistical methods are among the important methodologies that play a powerful role in data analysis. They can be useful when it is difficult to make assumptions abou
Chemistry
Water Moving Across a Single Membrane: Osmosis
Why does salted cabbage release its water overnight? This article covers what osmosis is, the three factors that drive it, everyday examples, and reverse osmosis, the technology th
Economics
Efficient Decision-Making Strategies Through Game Theory
Game theory is an important analytical tool used in many fields, helping us understand how individuals or groups make strategic decisions in situations involving interaction. In ec
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