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795 articles found
Tourism studies
Medical tourism is a phenomenon involving the use of medical services across national borders, including a range of services such as disease treatment, dental care, plastic surgery
Chemistry
A supercritical fluid is a substance pushed past its critical point, where the line between liquid and gas disappears. This article explains what the critical point means, the flui
Library & information science
The Mundaneum was a vast index-card archive founded in Brussels by Belgian lawyers Paul Otlet and Henri La Fontaine to gather the world’s knowledge in one place. This article cover
Logistics
Modal shift means moving freight that used to travel mainly by truck onto modes that carry large volumes at once, such as rail and coastal shipping. This piece covers why it matter
Library & information science
A library call number is the unique code on a book's spine that tells you where it sits and sets it apart from other items. This guide explains its parts: location marks, classific
Physics
Black holes are among the most mysterious objects in the universe. This article looks at how they form, from dying massive stars to the first stars after the Big Bang, traces the h
Statistics
An easy introduction to non-probability sampling in statistics, which selects samples based on the researcher's judgment or convenience, covering convenience, judgment (purposive),
Statistics
Why is it so likely that two people in a small group share a birthday? This article covers the birthday paradox, the two keys to calculating it, why our intuition misses it, and ho
Education
The Socratic Method is a way of teaching through repeated questions so learners find gaps in their own thinking and reach conclusions themselves. This piece covers its origins in S
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
Education
Montessori education sees children as born with the drive to learn and helps them grow by choosing activities and learning with their hands in a prepared environment. Learn how it
Tourism studies
Why do residents' smiles toward tourists turn into sighs as tourism grows? This article covers the background of Doxey's Irritation Index, its four stages of euphoria, apathy, anno
