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810 articles found
Earth science
Red waves that suddenly appear across a clear blue sea are more than a simple natural phenomenon: they are a red tide, which poses a major threat to marine ecosystems. Red tides ha
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
Robotics
What determines how a robot can move? This article explains degrees of freedom, covering what the term means, how six-axis industrial robot arms work, the degrees of freedom of the
Journalism & communication
Public opinion is a social phenomenon that takes shape through a complex process involving various actors. It plays an important role in society's development and change, and the p
Food & nutrition
Two foods with the same 20 g of protein can differ in quality. This article explains the Protein Digestibility Corrected Amino Acid Score (PDCAAS): essential amino acids, the three
Physics
Total internal reflection happens when light traveling from a material with a higher refractive index toward a lower one hits the boundary beyond the critical angle and is reflecte
Robotics
Soft robotics builds robots from flexible materials such as rubber and silicone, taking inspiration from creatures like the octopus and the elephant's trunk. This article covers ho
Film & media
Chroma key is a video compositing technique that makes one color on screen transparent and layers another background in its place. This piece covers how it works, its history from
Business administration
An initial public offering (IPO, Initial Public Offering) is an important process in which a company publicly sells its shares to outside investors for the first time. It is a key
Social welfare
Housing welfare policy plays an important role in ensuring the stability and comfort of housing, the basic living environment of citizens, and improving housing standards across th
Chemistry
Chirality is the property of an object or molecule that cannot be superimposed on its own mirror image. This article covers the basic definition of chirality, how mirror-image mole
Robotics
The end effector is the device at the tip of a robot arm that actually does the work. This article covers where it attaches, the types of grippers, process tools and sensors, how t
