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810 articles found
Social welfare
The Charity Organization Society (COS) was a private organization founded in London in 1869 to coordinate scattered charities so that help was neither duplicated nor missed. This a
Statistics
The Will Rogers phenomenon is when moving some members from one group to another raises the averages of both groups. This article covers where the name came from and how it works,
Food & nutrition
Food allergies are among the health problems many people face, occurring when the body's immune system overreacts to the consumption of certain foods. Allergic reactions can be mil
Information technology
Deepfake technology is a video and audio synthesis technology born out of advances in artificial intelligence (AI) and machine learning, producing results so sophisticated that the
Business administration
In the rough seas of corporate management, not every ship can always sail smoothly. Sometimes fierce storms threaten to sink a ship, and sometimes old cargo must be discarded to ch
Statistics
What the null and alternative hypotheses are, how to set them up for hypothesis testing, how significance level and statistical power shape the results, and three worked examples f
Information technology
Information security is becoming increasingly important in modern society. As the volume of digital information grows explosively, existing encryption technologies have limitations
Physics
Pascal’s principle states that pressure applied to a confined fluid at rest is transmitted undiminished throughout the fluid. We look at how it was formulated, how hydraulic device
Chemistry
Spectroscopy is a technique that plays an essential role in analyzing the properties and structures of substances and has become an indispensable tool in various fields today. This
Psychology
Psychologist Abraham Maslow divided basic human needs into five stages. This article introduces his hierarchy of needs, from physiological needs, safety, and belonging and love to
Library & information science
Co-citation analysis judges two documents to be closer in subject the more often other documents cite them together. Learn how it emerged, how co-citation strength is counted, how
Robotics
Passive dynamic walking is the idea that a machine can walk using only gravity and inertia, with no motors or controllers, as long as its body shape and weight distribution are rig
