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795 articles found
Robotics
Inverse kinematics finds the joint angles that place a robot’s end effector at a desired pose. This piece covers forward versus inverse kinematics, multiple or missing solutions an
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
Design
Design is a form of visual communication that plays a central role in conveying information and emotion. Proportion is a particularly important element of design, defining the rela
Chemistry
Avogadro’s number is the number of particles in one mole of a substance, about 6.02 × 10²³. This piece explains what it means, ways to grasp its size, how Avogadro, Cannizzaro, Los
Education
Even when learners study the same materials for the same amount of time, their results differ markedly. In the past, academics often dismissed these differences as simply a matter
Social welfare
Productive welfare is a new paradigm in social welfare that pursues individual self-reliance and social inclusion simultaneously, with sustainable development as its goal. As vario
Film & media
An anamorphic lens squeezes a wide scene only horizontally onto film or a sensor, then stretches it back by the same ratio to create a widescreen image. This article covers how it
Tourism studies
Plog’s Psychographic Model places travelers on a spectrum from adventurous allocentrics to familiarity-seeking psychocentrics and links them to the rise and fall of destinations. T
General knowledge
Murphy's Law is the rule of thumb that anything that can go wrong eventually will. This piece covers its origins in the U.S. Air Force's MX981 rocket sled tests and Edward Murphy's
Economics
As uncertainty in the global economy grows, exchange rate fluctuations are having an increasingly significant impact on international financial markets and national economies. Sout
Education
Early childhood education takes place during the early stages of human development and plays an important role in promoting children's holistic development (the development of a we
Film & media
Day for night is a filmmaking technique that makes scenes shot in daylight look like night. This article covers why filmmakers shoot night in the daytime, the four main ways to fak
