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The term goniometry derives from two Greek words, γωνία 'angle' and μέτρον 'measure'. [1] The protractor is a commonly used type in the fields of mechanics, engineering, and geometry. The first known description of a goniometer, based on the astrolabe , was by Gemma Frisius in 1538.
A Goniophotometer is a device used for measurement of the light emitted from an object at different angles. [1] The use of goniophotometers has been increasing in recent years with the introduction of LED -light sources, which are mostly directed light sources, where the spatial distribution of light is not homogeneous. [ 2 ]
Klafter - German measure of outstretched hands; League - the distance a person can walk in an hour (by one definition) Orgyia - Ancient Greek fathom; Parasang - the distance an infantryman could march in a predefined period of time; Pygmē - distance from elbow to base of fingers; Sazhen - Russian fathom; Shaftment - width of the fist and ...
Analog and traditional devices to measure range of motion in the joints of the body include the goniometer and inclinometer which use a stationary arm, protractor, fulcrum, and movement arm to measure angle from axis of the joint. As measurement results will vary by the degree of resistance, two levels of range of motion results are recorded in ...
Goniophotometry or goniometric optical scatter measurement is the technique of measuring the angular distribution of light, possibly wavelength-dependent, scattered from a surface. Goniophotometry is used to measure intensity distributions from lamps and luminaries and to evaluate the gloss of paints and other surface finishes.
The word literally means "arm", and survives in the modern English word "elbow" (arm-bend). Later usage through the 19th century refers to several longer units, [2] [3] some of which are thought to derive from a "double ell". [4] [5] An ell-wand or ellwand was a rod of length one ell used for official measurement.
The simplest way of measuring the contact angle of a sessile drop is with a contact angle goniometer, which allows the user to measure the contact angle visually. A droplet is deposited by a syringe which is positioned above the sample surface, and a high resolution camera captures the image from the profile or side view.
A conductive ink based flex sensor. A flex sensor or bend sensor is a sensor that measures the amount of deflection or bending.Usually, the sensor is stuck to the surface, and resistance of sensor element is varied by bending the surface.
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