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810 articles found
Psychology
Psychology uses the concepts of personal space and territory to study how we perceive and try to protect our physical and emotional space. Personal space and territory are importan
Economics
Why do we sit through a dull movie just because we paid for the ticket? This guide explains sunk costs, the bygones principle, why people fall into the sunk cost fallacy, classic e
Social welfare
When we say someone has a “need,” we can mean four different things. This article walks through Bradshaw’s Taxonomy of Social Need: normative, felt, expressed and comparative need,
General knowledge
CCL (Creative Commons License) lets creators state in advance how their work may be used, so others can use it without asking for permission each time. This article explains the co
Information technology
Drones are used in more and more fields, from the military to commercial, industrial, and personal use. This article explains what drones are, where they are used, the key technolo
Chemistry
Analytical chemistry is a branch of chemistry that scientifically analyzes the composition, structure, and chemical properties of substances. This discipline plays a very important
Psychology
In everyday life, we face countless tasks and challenges that require concentration. Concentration plays a very important role in learning, work, and achieving personal goals. In m
Economics
If you had a worn, crumpled bill and a crisp new one in your wallet, which would you hand over first? This article explains Gresham's Law, the idea that bad money drives out good:
Education
In modern society, educating children is one of parents' greatest concerns. Although school education plays an important role, education at home is essential for children's holisti
Information technology
Kerckhoffs's Principle holds that a cryptographic system should stay secure even if everything except the key is known. This piece covers Auguste Kerckhoffs's 1883 “La Cryptographi
Statistics
The ecological fallacy is the mistake of assuming that conclusions drawn from group-level data apply equally to each individual in the group. This article covers how the name arose
Food & nutrition
Why doesn't honey spoil easily even though it contains water? This article explains water activity, a measure of the free water in food, and how it is measured, the limits below wh
