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810 articles found
Economics
Macroeconomics plays an important role in understanding the overall state and trends of a national economy. South Korea's economy currently faces various challenges and opportuniti
Physics
Why does an ambulance siren suddenly drop to a lower, drawn-out pitch the moment it passes you? This guide explains the Doppler effect, from its basic concept and working principle
Psychology
Depression is emerging as an important issue in society, and many people suffer from this condition. Depression is a serious illness that goes beyond a simple low mood, involves ps
Information technology
Why do the shortcuts we take for speed today come back later at a high price? This article explains technical debt, the term first used by Ward Cunningham, how interest builds up,
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,
Chemistry
Chemical catalysts are essential substances for accelerating chemical reactions or optimizing reaction conditions. Catalysts can maximize reaction efficiency without being consumed
Chemistry
Nanotechnology precisely manipulates materials at the molecular or atomic level and is driving innovative changes across a variety of industries. In chemistry in particular, nanote
Chemistry
Chemiluminescence is the phenomenon in which energy released by a chemical reaction comes out as light instead of heat. This piece covers how excited molecules produce this ‘cold l
Physics
Why does a drop of water skate across a very hot pan and last longer than on a merely warm one? This article explains the Leidenfrost effect, from the vapor cushion that lifts the
Journalism & communication
Why is the press called the “fourth estate”? This article traces the phrase from the three estates and the press gallery of the British Parliament to Macaulay, Carlyle, and the Bur
Economics
Engel's law is the empirical rule that as income rises, the share of total spending that goes to food steadily falls. This piece covers the basic concept, the Engel coefficient and
Information technology
What is the Year 2038 problem? It is the glitch in which computers that store Unix time in 32 bits mistake moments after January 19, 2038, for 1901. This article covers how it work
