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810 articles found
Library & information science
Berrypicking, named by Marcia J. Bates in 1989, is a model of search in which queries and interests evolve and useful information is gathered bit by bit—unlike classical retrieval
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
Chemistry
Chemical bonds form through the interaction of atoms and electrons and determine the properties of matter. Explore the basic principles of chemical bonding and how ionic, covalent,
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
Film & media
Why does a slightly tilted frame make us uneasy? This article covers what the Dutch angle is, its roots in German Expressionism and the origin of its name, how film and TV have use
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
General knowledge
Writing reports is a big part of college life, but it can be hard for first-year students. This guide covers report structure, research, the cover page and table of contents, and h
Tourism studies
Cultural tourism interpreters play an important role in helping people understand and enjoy tourist destinations and cultural heritage more deeply. By providing visitors with exten
Film & media
A dolly zoom moves the camera while zooming the lens the opposite way, keeping a person the same size while the background stretches or swells. This piece covers its birth in Hitch
Earth science
Why does solid ground turn soft and flow like water during an earthquake? This article explains soil liquefaction, in which water-saturated sandy ground behaves like a liquid, cove
Logistics
Why do warehouses hold more inventory than they expect to sell? This article explains what safety stock is and how it relates to the reorder point, how to calculate it from the ser
Business administration
In this article, we will explore methods for managing and evaluating performance when running a company or organization. Performance management is an organizational management meth
