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Goniometer

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605: 215: 308: 328: 646: 375: 340: 701: 223: 363: 292: 728:(CATRA) in the UK, a range of devices can accurately determine the cutting edge profile, including a rounding of the tip to ½°. The included angle of a blade is important in controlling its cutting ability and edge strength—i.e., a low angle makes a thin sharp edge optimized for cutting softer materials, while a large angle makes a thick edge that is less sharp but stronger, which may be better for cutting harder materials. 451:. It used the signals from two crossed antennas, or four individual antennas simulating two crossed ones, to re-create the radio signal in a small area between two loops of wire. The operator could then measure the angle to the target radio source by performing direction finding within this small area. The advantage to the Bellini–Tosi system is that the antennas do not move, allowing them to be built at any required size. 280: 585: 38: 391: 101: 161: 264:
an angle between the beam and the blade of 90° or less, the reading may be obtained directly from the graduation number on the dial indicated by the mark on the swivel plate. To measure an angle of over 90°, subtract the number of degrees as indicated on the dial from 180°, as the dial is graduated from opposite zero marks to 90° each way.
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application developers have created mobile applications that provide the functions of a goniometer. These applications (such as Knee Goniometer and Goniometer Pro) use the accelerometers in phones to calculate joint angles. Recent research supports these applications and their devices as reliable and
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The bevel protractor consists of a beam, a graduated dial, and a blade which is connected to a swivel plate (with Vernier scale) by a thumb nut and clamp. When the edges of the beam and blade are parallel, a small mark on the swivel plate coincides with the zero line on the graduated dial. To measure
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processes, can be inspected with a goniometer, typically with a built-in light source, to examine the blade edge for wear and correct angles. A difference in angle from that set on the machine may indicate excessive pressure, and a range of angles ("rounding") probably indicates a lack of stiffness,
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and manufactured by ramé-hart (now ramé-hart instrument company), New Jersey, USA. The original manual contact angle goniometer used an eyepiece with a microscope. Today's contact angle goniometer uses a camera and software to capture and analyze the drop shape, and is better suited for dynamic and
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of limbs and joints of the body. These measurements help accurately track progress in a rehabilitation program. When a patient has decreased range of motion, a therapist assesses the joint before performing an intervention, and continues to use the tool to monitor progress. The therapist can take
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These goniometers come in different forms that some argue increase reliability. The universal standard goniometer is a plastic or metal tool with 1 degree increments. The arms are usually not longer than 12-inches, so it can be hard to accurately pinpoint the exact landmark for measurement. The
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Modern rehabilitative therapy motion capture systems perform goniometry at the very least measuring active range of motion. While in some cases accuracy may be inferior to a goniometer, measuring angles with a motion capture system is superior at measuring during dynamic, as opposed to static
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Since the spaces, both on the main scale and the Vernier scale, are numbered both to the right and the left from zero, any angle can be measured. The readings can be taken either to the right or to the left, according to the direction in which the zero on the main scale is moved.
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between any two liquids. If the difference in densities between the two fluids is known, the surface tension or interfacial tension can be calculated by the pendant drop method. An advanced instrument often called a goniometer / tensiometer includes software tools that measure
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these range of motion measurements at any joint. They typically require knowledge about the anatomy of the body, particularly bony landmarks. For example, when measuring the knee joint, the therapist places the axis (point of rotation) on the lateral
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The basic technique remains in use, although the equipment has changed dramatically. Goniometers are widely used for military and civil purposes, e.g. interception of satellite and naval communications on the French warship
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Surface tension exists because the molecules inside a liquid experience roughly equal cohesive forces in all directions, but molecules at the surface experience larger attractive forces toward the liquid than toward
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are attached to give more precise readings. It has wide application in architectural and mechanical drawing, although its use is decreasing with the availability of modern drawing software or
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with a partial worm wheel fixed to the underside of the stage platform meshing with a worm in the base. The worm gear may be rotated manually, or by a motor in automated positioning systems.
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situations. Furthermore, using a traditional goniometer takes valuable time. In the clinical context, performing manual measurements takes valuable time and may not be practical.
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telescopic-armed goniometer is more reliable—with a plastic circular axis like a classic goniometer, but with arms that extend to as long as two feet in either direction.
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Milanese, Gordon. "Reliability and concurrent validity of knee angle measurement: Smart phone app versus universal goniometer used by experienced and novice clinicians".
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Universal bevel protractors are also used by toolmakers; as they measure angles by mechanical contact they are classed as mechanical protractors.
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A positioning goniometer or goniometric stage is a device that rotates an object precisely about a fixed axis in space. It is similar to a
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may increase as the experience of the examiner decreases. Some studies suggest that these errors can be anywhere between 5 and 10 degrees.
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evaluators to determine a permanent disability. This is to evaluate progress, and also for medico-legal purposes. It is a tool to evaluate
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The included cutting angles of all kinds of sharp edge blades are measured using a laser reflecting goniometer. Developed by the
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is sometimes a problem with goniometers. Issues with the intra-measure (between measures) and inter-tester (between clinicians)
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A bevel protractor is a graduated circular protractor with one pivoted arm; used for measuring or marking off angles. Sometimes
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In a contact angle measurement, the angle between the droplet and solid surface indicates the wettability of the surface.
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A goniometer is used to document initial and subsequent range of motion, at the visits for occupational injuries, and by
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is an instrument that either measures an angle or allows an object to be rotated to a precise angular position. The term
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A miniature electro-mechanical goniometer stage. This type of stage is used primarily in the field of lasers and optics.
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The bevel protractor is used to establish and test angles to very close tolerances. It reads to 5 arcminutes (5′ or
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In physical therapy, occupational therapy, Orthotics and prosthetics and athletic training, a goniometer measures
1620: 1568: 961: 1108:"Concurrent validity and reliability of the simple goniometer iphone app compared with the universal goniometer" 1007:"Concurrent validity and reliability of the simple goniometer iPhone app compared with the universal goniometer" 1625: 552: 136: 1533: 1523: 1518: 817: 314: 135:. Most protractors are divided into 180 equal parts. Some precision protractors further divide degrees into 1558: 1548: 1304: 772: 695: 440: 171: 1538: 645: 144: 1231: 1578: 1573: 1279: 1267: 762: 395: 113: 873: 1543: 1389: 1324: 671: 662: 353: 120:. Some protractors are simple half-discs or full circles. More advanced protractors, such as the 1474: 1299: 1148: 1047: 683: 532: 495: 547:, and records a measurement using the degree scale on the circular portion of the tool. Reading 511: 700: 54: 1364: 1344: 1140: 1088: 1039: 940: 915: 883: 878: 480: 1359: 1319: 1179: 1130: 1122: 1078: 1029: 1021: 633: 222: 1424: 847: 812: 790: 667: 658: 613: 597: 523: 491: 468: 183: 471:, goniometers are used for measuring angles between crystal faces. They are also used in 674:
using the pendant drop, inverted pendant drop, and sessile drop methods, in addition to
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is a commonly used type in the fields of mechanics, engineering, and geometry.
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Goniometer made by Develey le Jeune in Lausanne, late 18th–early 19th century
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measure the spatial distribution of light visible to the human eye (often
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relates the contact angles to the adhesion of the drop to the surface. A
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to rotate the samples. The groundbreaking investigations of physicist
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André-Louis Cholesky: Mathematician, Topographer, and Army Officer
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measures the reflectivity of a surface at a number of angles.
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Surface scientists use a contact angle goniometer to measure
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valid tools with as much accuracy as a universal goniometer.
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by Petri Appiani as a 16-page appendix by Frisius entitled
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optical (2) goniometers for use in crystallography, c. 1900
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The first known description of a goniometer, based on the
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Reference for the famous Chain Home British Radar of WWII
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Kuegler, P.; Wurzer, P.; Tuca, A.; et al. (2015).
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of the femur, and lines up the stationary arm with the
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Pages displaying wikidata descriptions as a fallback
514:(findings that may indicate symptom magnification.) 1200:"Markerless Motion Capture. Biomechanical Analysis" 827: – Area of geometry, about angles and lengths 333:A half circle protractor marked in degrees (180°). 104:A half-circle protractor marked in degrees (180°). 131:(°). Radian-scale protractors measure angles in 935:Brezinski, Claude; Tournès, Dominique (2014). 726:Cutlery and Allied Trades Research Association 720:Knife and blade cutting edge angle measurement 419:was described in the second (1533) edition of 1252: 654: 8: 345: 182:. There might be a discussion about this on 562:More recently in the twenty-first century, 260:°) and can measure angles from 0° to 450°. 1259: 1245: 1237: 425:Libellus de locorum describendorum ratione 1183: 1134: 1082: 1033: 202:Learn how and when to remove this message 644: 837: 753:or wear, in the blade holder assembly. 630:United States Naval Research Laboratory 380:Protractor scale in degrees and radians 275: 415:. The application of triangulation to 962:"Radio receiver workload accelerates" 914:. Industrial Press Inc. p. 580. 7: 872:Capotosto, Rosario (December 1993). 285:A 360° protractor marked in degrees. 911:Handbook of Dimensional Measurement 127:Most protractors measure angles in 1115:Physiotherapy: Theory and Practice 1014:Physiotherapy: Theory and Practice 960:Boucher, Jacqueline (3 May 2007). 908:Farago, Francis T; Curtis (1994). 25: 1232:Simulator of goniometer in degree 373: 361: 338: 326: 306: 290: 278: 159: 1399: 845:Spencer, Leonard James (1911). 483:in 1912 involved a goniometer. 297:A 400 gon protractor marked in 407:Prior to the invention of the 218:A half-circle bevel protractor 53:derives from two Greek words, 1: 661:for any liquid in gas or the 437:Bellini–Tosi direction finder 411:, the goniometer was used in 226:A universal bevel protractor. 1310:Coordinate-measuring machine 1127:10.3109/09593985.2014.900835 1026:10.3109/09593985.2014.900835 680:centrifugal adhesion balance 481:atomic structure of crystals 1601:Angle measuring instruments 1071:The Journal of Knee Surgery 775:for drawing circles or arcs 459:uses multiple goniometers. 32:Goniometer (disambiguation) 1647: 1065:Ockendon, Matthew (2012). 693: 443:that was widely used from 139:. A protractor divided in 121: 29: 27:Angle measuring instrument 1513: 1275: 1185:10.1186/s40886-015-0003-4 655:Contact angle goniometers 1554:Machine and metalworking 874:"Bridge City Protractor" 580:Contact angle goniometer 479:and colleagues into the 1606:Dimensional instruments 1564:Measuring and alignment 858:Encyclopædia Britannica 818:Technical drawing tools 806: – radio range set 732:Doctor blade inspection 657:can also determine the 315:Cras navigation plotter 1084:10.1055/s-0031-1299669 1005:Jones, Sealey (2014). 773:Compass (drawing tool) 705: 696:Positioning goniometer 651: 609: 601: 518:Rehabilitative therapy 441:radio direction finder 399: 346: 227: 219: 143:is normally called a " 105: 42: 1631:Surveying instruments 939:. Basel: Birkhäuser. 703: 648: 607: 587: 393: 368:Electronic protractor 225: 217: 145:percentage protractor 103: 40: 1616:Occupational therapy 1611:Laboratory equipment 1529:Cutting and abrasive 1365:Laser measuring tool 620:measures the static 352:, a special type of 172:confusing or unclear 114:measuring instrument 30:For other uses, see 1270:and alignment tools 672:interfacial tension 663:interfacial tension 421:Cosmograficus liber 354:protractor triangle 180:clarify the article 1475:Thread pitch gauge 1300:Combination square 848:"Goniometer"  706: 684:gonioreflectometer 652: 637:advanced studies. 610: 602: 533:greater trochanter 496:luminous intensity 400: 228: 220: 106: 43: 1588: 1587: 1280:Architect's scale 1106:Jones, A (2014). 946:978-3-319-08134-2 879:Popular Mechanics 763:Birkhoff's axioms 487:Light measurement 473:X-ray diffraction 212: 211: 204: 16:(Redirected from 1638: 1621:Physical therapy 1360:Laser line level 1325:Engineer's scale 1320:Drafting machine 1261: 1254: 1247: 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Index

Protractor
Goniometer (disambiguation)

γωνία (gōnía)
angle
μέτρον (métron)
measure
astrolabe
Gemma Frisius

measuring instrument
angles
bevel protractor
degrees
radians
arcminutes
centiturns
percentage protractor
confusing or unclear
clarify the article
the talk page
Learn how and when to remove this message


Vernier scales
CAD
A 360° protractor marked in degrees.
A 400 gon protractor marked in gradians.
gradians
A "Cras navigation plotter" double-protractor, in foreground, named after its inventor Jean Cras.

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