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810 articles found
Statistics
Analysis of variance (ANOVA, Analysis of Variance) is one of the essential analytical techniques in statistics and is widely used across many fields. By testing differences in the
Chemistry
How can pencil lead and a diamond ring be made of exactly the same carbon? This article explains allotropes: what they are and how they arise, the many faces of carbon, examples fr
Education
In traditional education, we always see the same scene. The teacher explains diligently at the blackboard, while students sit at their desks, busy taking notes. When class ends, th
Business administration
In today's business environment, choosing an appropriate business form is important for running a successful business. The business form determines the legal structure of a busines
Chemistry
Distillation heats a liquid mixture, sends the more volatile components off as vapor first, then cools that vapor back into liquid to separate what was mixed. We look at its histor
Library & information science
This time, we will explore the concept of repositories, which are primarily established and used by universities and research institutions, and ways to obtain research papers for f
Statistics
Reliability and validity always come up when studying surveys in statistics, marketing, or opinion polling. This guide uses two illustrated examples, shooting and makeup, to make t
Physics
Rayleigh scattering, worked out by Lord Rayleigh in 1871, is the scattering of light by particles much smaller than its wavelength, such as air molecules, and it is far stronger fo
Robotics
The Zero Moment Point (ZMP) is the point under the feet where ground forces create no tipping moment, long used to judge whether a biped robot will fall. This piece covers the supp
Psychology
Love is one of the most powerful and complex emotions in human life. While this complexity of love is fascinating in itself, understanding and assessing our types of love plays an
General knowledge
Fermi estimation breaks an unknown quantity into numbers you already know, roughly estimates each piece, and multiplies them to get the order of magnitude. This article covers the
Earth science
Why can one side of a mountain range be cool and damp while the other is hot and dry? This article explains the foehn effect: how air changes temperature as it rises and descends o
