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On teaching angle and angle measure
The Mathematics Teacher, 1957An algebraic approach to some problems untouched by classical Euclidean geometry.
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Ring laser in angle measurements
Earth Observing Systems XXIII, 2018With high demand in performances, ring laser is proposed as an angular measuring transducer, due to its many considerable advantages compared to other means of angle’s measurement, since it’s based on the physical fundamentals, methods, equation/logarithms are developed and experimental work using high precision goniometer, this paper focus on reducing
N. Abraham Eno +2 more
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The Mathematics Teacher, 1947
In selecting a topic for discussion on this program which deals with Mathematics in Human Affairs the speaker has chosen to talk about the subject of angular measure. In some of his former talks he has discussed such matters as how to figure silage, compute the amount of hay in a stack, and other subjects.
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In selecting a topic for discussion on this program which deals with Mathematics in Human Affairs the speaker has chosen to talk about the subject of angular measure. In some of his former talks he has discussed such matters as how to figure silage, compute the amount of hay in a stack, and other subjects.
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MEASUREMENT OF THE NORMAL LUMBOSACRAL ANGLE
American Journal of Roentgenology, 1971Determination of the lumbosacral angle in the upright position was performed on 319 normal males ranging in age from 1758 years, who had lumbosacral spine roentgenograms made as part of a routine preemployment examination.The mean was 41.1°, with a standard deviation of 7.7°.A curve allowing one to state the expected percentile of a specific patient’s ...
H K, Hellems, T E, Keats
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Angle amplification for nanoradian measurements
Applied Optics, 2006A method to amplify the rotation angle of a mirror, based on multiple reflections between two quasi-parallel mirrors, is presented. The method allows rotations of fractions of nanoradians to be measured with a simple setup. The working principle, the experimental setup, and the results are presented.
PISANI, MARCO, ASTRUA, MILENA
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Reliable Measurement of the Receding Contact Angle
Langmuir, 2013Surface wettability is usually evaluated by the contact angle between the perimeter of a water drop and the surface. However, this single measurement is not enough for proper characterization, and the so-called advancing and receding contact angles also need to be measured.
Korhonen, Juuso T. +4 more
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Applied Mechanics and Materials, 2012
Laser is widely used in angle measurements. This paper presents several frequently used methods of angle measurement that utilize laser, including：autocollimation angle measurement, angle measurement based on internal-reflection effect, laser interference angle measurement, angle measurement with ring laser and angle measurement with CCD. The principle,
Yang Wang +2 more
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Laser is widely used in angle measurements. This paper presents several frequently used methods of angle measurement that utilize laser, including：autocollimation angle measurement, angle measurement based on internal-reflection effect, laser interference angle measurement, angle measurement with ring laser and angle measurement with CCD. The principle,
Yang Wang +2 more
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A CLINOMETER FOR MEASURING SMALL ANGLES
Canadian Journal of Research, 1946The paper describes a clinometer for the accurate measurement of angles of elevation or depression up to 5° from the horizontal. The geometrical design permits a theoretical precision of ± 2″ to be attained in this range on a uniformly divided micrometer head without the application of corrections or the use of cams or associated devices.
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Measuring mislocalization of angle vertices.
Canadian Journal of Experimental Psychology / Revue canadienne de psychologie expérimentaleLocalisation of simple stimuli such as angle vertices may contribute to a plethora of illusory effects. We focus on the Müller-Lyer illusion in an attempt to measure and characterise a more elementary effect that may contribute to the magnitude of said illusion. Perceived location error of angle vertices (a single set of Müller-Lyer fins) and arcs in a
Pavle Valerjev, Marin Dujmović
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Measurement of Small Surface Angles
Nature, 1949IT has been established that multiple-beam fringes of equal chromatic order are particularly sensitive for the evaluation of small surface angles. Yet they suffer from a disadvantage in that the angle shown by the fringes depends upon the orientation of the surface relative to the spectrograph slit.
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