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Journal articles on the topic 'Measuring the position'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Catanese, Dominic, Daniel Popowitz, and Aharon Z. Gladstein. "Measuring Sesamoid Position in Hallux Valgus." Foot & Ankle Specialist 7, no. 6 (July 7, 2014): 457–59. http://dx.doi.org/10.1177/1938640014539804.

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Measuring tibial sesamoid position is an important component of the preoperative radiographic evaluation of hallux valgus as it helps guide the surgeon in surgical selection. Tibial sesamoid position is typically measured on an anteroposterior (AP) radiograph on a scale from 1 to 7 as described by Hardy and Clapham. Some authors have advocated measuring the position on the sesamoid axial view, noting that the AP and axial views often yield different measurements. There is no consensus as to which view is more helpful in guiding the surgeon’s surgical decision. Weightbearing radiographs of 99 feet in patients with a clinical diagnosis of hallux valgus were retrospectively reviewed. Tibial sesamoid position was measured on the AP view using the 7-point scale of Hardy and Clapham. Tibial sesamoid position was also measured on the axial radiograph. Cohen’s kappa statistic was used to assess agreement of measurements obtained on the 2 views. There was poor agreement of the AP and axial views, with a kappa of 0.31. In our analysis of the data, it was determined that the lack of agreement was due mainly to X-rays showing tibial sesamoid positions of 4 and 5. A subgroup analysis of all X-rays with tibial sesamoids in positions other than 4 or 5 showed excellent agreement, with a kappa of 0.95. Anteroposterior and sesamoid axial views of feet with hallux valgus show excellent agreement in patients with the tibial sesamoid in positions other than 4 or 5. If the tibial sesamoid has a position of 4 or 5 on the AP, an axial view may be warranted to further understand the extent of deformity. Levels of Evidence: Diagnostic, Level IV: Case series

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2

Busch, Paul, Jukka Kiukas, and Pekka Lahti. "Measuring position and momentum together." Physics Letters A 372, no. 24 (June 2008): 4379–80. http://dx.doi.org/10.1016/j.physleta.2008.04.019.

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3

Driessen, F. P. G., F. H. R. Lucassen, and H. H. van de Ven. "A Three-Dimensional Position Measuring System." IFAC Proceedings Volumes 19, no. 14 (December 1986): 309–13. http://dx.doi.org/10.1016/s1474-6670(17)59496-3.

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4

Murphy, Evan, and Stephen Hughes. "Measuring global position using the Sun." Physics Education 49, no. 5 (September 2014): 553–56. http://dx.doi.org/10.1088/0031-9120/49/5/553.

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5

Salmond, Clare, and Peter Crampton. "Measuring socioeconomic position in New Zealand." Journal of Primary Health Care 4, no. 4 (2012): 271. http://dx.doi.org/10.1071/hc12280.

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INTRODUCTION: Measures of socioeconomic position (SEP) are widely used in health research. AIM: To provide future researchers with empirically based guidance about the relative utility of five measures of SEP in predicting health outcomes. METHODS: Data from 12 488 adults were obtained from the 2006 New Zealand Health Survey. Seven health-related outcome measures with expected variations by SEP are modelled using five measures of SEP: a census-based small-area index of relative socioeconomic deprivation, NZDep2006; a questionnaire-based individual-level index of socioeconomic deprivation, NZiDep; an index of living standards, ELSI; education, measured by highest qualification; and equivalised household income. RESULTS: After including the individual measure of deprivation, the area-based measure of deprivation adds useful explanatory power, and, separately, the broader spectrum provided by the living standards index adds only a small amount of extra explanatory power. The education and household income variables add little extra explanatory power. DISCUSSION: Both NZiDep and ELSI are useful health-outcome predictors. NZiDep is the cheapest data to obtain and less prone to missing data. The area index, NZDep, is a useful addition to the arsenal of individual SEP indicators, and is a reasonable alternative to them where the use of individual measures is impracticable. Education and household income, using commonly used measurement tools, may be of limited use in research if more proximal indicators of SEP are available. NZDep and NZiDep are cost-effective measures of SEP in health research. Other or additional measures may be useful if costs allow and/or for topic-related hypothesis testing. KEYWORDS: Deprivation; inequalities; living standards; New Zealand; socioeconomic position

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6

Galobardes, B., J. Lynch, and G. D. Smith. "Measuring socioeconomic position in health research." British Medical Bulletin 81-82, no. 1 (February 6, 2007): 21–37. http://dx.doi.org/10.1093/bmb/ldm001.

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7

Zeng, Lijiang, and Deqiang Song. "Fringe position method for measuring the position of a tracking mirror." Measurement Science and Technology 10, no. 2 (January 1, 1999): N13—N16. http://dx.doi.org/10.1088/0957-0233/10/2/012.

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8

HUANG Ji-peng, 黄继鹏, 王延杰 WANG Yan-jie, 孙宏海 SUN Hong-hai, and 张少迪 ZHANG Shao-di. "Precise position measuring system for laser spots." Optics and Precision Engineering 21, no. 4 (2013): 841–48. http://dx.doi.org/10.3788/ope.20132104.0841.

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9

Ghadiry, Walaa Eldeen, and Mohamed Sakr. "USING PRECISE POSITION CONTROL IN MEASURING SYSTEMS." International Conference on Electrical Engineering 8, no. 8th (May 1, 2012): 1–21. http://dx.doi.org/10.21608/iceeng.2012.30573.

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10

Chen, Jian-Jun, Zhong-Rui Bai, A.-Li Luo, and Yong-Heng Zhao. "Measuring fiber position errors from spectral data." Research in Astronomy and Astrophysics 15, no. 4 (March 31, 2015): 608–16. http://dx.doi.org/10.1088/1674-4527/15/4/012.

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11

Bolt, R. A., and J. J. ten Bosch. "Method for measuring position-dependent volume reflection." Applied Optics 32, no. 24 (August 20, 1993): 4641. http://dx.doi.org/10.1364/ao.32.004641.

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12

Serban, P. E., and F. Peti. "Coordinate Measuring Machine thread position measurement analysis." IOP Conference Series: Materials Science and Engineering 898 (August 25, 2020): 012018. http://dx.doi.org/10.1088/1757-899x/898/1/012018.

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13

Potts, Cory Adam, Alexander A. Brown, Stanislaw Solnik, and David A. Rosenbaum. "A method for measuring manual position control." Acta Psychologica 180 (October 2017): 117–21. http://dx.doi.org/10.1016/j.actpsy.2017.08.012.

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14

Andersen, Susan B., Donna M. Terwilliger, and Craig R. Denegar. "Comparison of Open versus Closed Kinetic Chain Test Positions for Measuring Joint Position Sense." Journal of Sport Rehabilitation 4, no. 3 (August 1995): 165–71. http://dx.doi.org/10.1123/jsr.4.3.165.

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The purpose of this study was to determine if a difference exists in the reproducibility of knee joint flexion angles in an open versus a closed kinetic chain. Thirty generally healthy subjects (12 males, 18 females; mean age 23.8 years) participated. Subjects actively reproduced small, medium, and large knee flexion angles (with target angles of 15°, 45°, and 75°, respectively) in an open and a closed kinetic chain while being videotaped. Goniometric measurements were taken from the videotape of initial and reproduced joint angles. Data were analyzed using ANOVA with repeated measures on kinetic chain test position and joint angle. Subjects more accurately reproduced knee flexion angles in a closed kinetic chain position. The main effect for angle and the interaction of angle and test position were nonsignificant. The results indicate that knee joint position is more accurately reproduced in closed kinetic chain. Closed kinetic chain testing is also a more functional assessment of joint position sense, and thus closed kinetic chain assessment of lower extremity joint position sense is recommended.

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15

Jeong, Gyung-Ho. "Measuring Foreign Policy Positions of Members of the US Congress." Political Science Research and Methods 6, no. 1 (January 28, 2016): 181–96. http://dx.doi.org/10.1017/psrm.2016.3.

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Studies have shown that a foreign policy position of a member of Congress is often distinct from a domestic one. Despite this, measures commonly used to determine the foreign policy positions of members of Congress are based on congressional votes on domestic as well as foreign policy matters. As foreign policy votes take up only a small portion of all congressional votes, these measures conflate a member’s foreign policy position with his or her domestic policy position. While there are other measures based exclusively on foreign policy votes, these are also problematic because they tend to use a small number of controversial votes and thus inflate extremism. To address these shortcomings, I present a new measure by applying a Bayesian item response theory model to all foreign policy votes. This paper demonstrates the similarities, differences, and advantages of this measure by comparing it with the existing measures in a series of analyses of foreign policy positions of political parties and individual legislators.

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16

Bezzi, Michele, Inés Samengo, Stefan Leutgeb, and Sheri J. Mizumori. "Measuring Information Spatial Densities." Neural Computation 14, no. 2 (February 1, 2002): 405–20. http://dx.doi.org/10.1162/08997660252741176.

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A novel definition of the stimulus-specific information is presented, which is particularly useful when the stimuli constitute a continuous and metric set, as, for example, position in space. The approach allows one to build the spatial information distribution of a given neural response. The method is applied to the investigation of putative differences in the coding of position in hippocampus and lateral septum.

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17

LI Wei, 李伟, 高思田 GAO Si-tian, 卢明臻 LU Ming-zhen, 施玉书 SHI Yu-shu, and 杜华 DU Hua. "Position measuring system in metrological atomic force microscope." Optics and Precision Engineering 20, no. 4 (2012): 796–802. http://dx.doi.org/10.3788/ope.20122004.0796.

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18

Budiský, Roman, Marian Králik, and Ján Kost. "Evaluation of True Position Using Coordinate Measuring Machine." Applied Mechanics and Materials 555 (June 2014): 511–17. http://dx.doi.org/10.4028/www.scientific.net/amm.555.511.

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The article makes a contribution to the ever-important topic of evaluating geometric deviations of tolerated forms related to the datum system using coordinate measuring machines with a touch probe system. The datum system consists of the coordinate system and the coordinates planes. An integral part of the article is the quantification of the true position tolerated form related to the datum system and experimental evaluation of the deviation with calculation of measurement uncertainty, according to STN EN ISO 15530-3.

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19

Hristoforou, E., and H. Chiriac. "Position measuring system for applications in field sports." Journal of Magnetism and Magnetic Materials 249, no. 1-2 (August 2002): 407–10. http://dx.doi.org/10.1016/s0304-8853(02)00567-x.

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20

Li, Zhao Yu, and Xiang Dong Gao. "Study on Regression Model of Measuring Weld Position." Applied Mechanics and Materials 511-512 (February 2014): 514–17. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.514.

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Seam tracking technology is an important area of research automatic arc welding, precise seam tracking is crucial to achieve high quality welds. In order to achieve precise seam tracking, seam deviation ( the weld center arc deviation) detection is a key. Unlike the conventional method by image processing techniques to obtain the seam deviation information directly, but selected image processing area (including the distal end portion of the molten pool welds and the front end of the pool), and analyzed as a pool image centroid characteristic parameters of the weld deviation. Study these parameters to create a new method for visual weld deviation measurement model, establish the linear regression model between pool image centroid deviation and the weld based on regression analysis theory.

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21

Abdelmalek, Latifa, Eckhard Hempel, and Harald Fischer. "Optoelektronisches 3D-Positionsmesssystem (Optical 3D-Position Measuring System)." tm - Technisches Messen 71, no. 1-2004 (January 2004): 10–18. http://dx.doi.org/10.1524/teme.71.1.10.25423.

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22

Ozawa, Masanao. "Position measuring interactions and the Heisenberg uncertainty principle." Physics Letters A 299, no. 1 (June 2002): 1–7. http://dx.doi.org/10.1016/s0375-9601(02)00659-x.

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23

Friedland, Bernard. "System for measuring the position of vibration object." Journal of the Acoustical Society of America 88, no. 4 (October 1990): 2049. http://dx.doi.org/10.1121/1.400160.

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24

Bartley, M. "Measuring women's social position: the importance of theory." Journal of Epidemiology & Community Health 53, no. 10 (October 1, 1999): 601–2. http://dx.doi.org/10.1136/jech.53.10.601.

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25

Grishin, Vladimir A. "Accuracy of Measuring Camera Position by Marker Observation." Journal of Software Engineering and Applications 03, no. 10 (2010): 906–13. http://dx.doi.org/10.4236/jsea.2010.310107.

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26

Bebek, O., and M. C. Cavusoglu. "Whisker-Like Position Sensor for Measuring Physiological Motion." IEEE/ASME Transactions on Mechatronics 13, no. 5 (October 2008): 538–47. http://dx.doi.org/10.1109/tmech.2008.2001184.

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27

SAITO, Haruka, Tomohito TAKUBO, Atsushi UENO, Kai CAI, Ryusuke MIYAMOTO, and Shinsuke HARA. "Recognizing own UAV Position and Measuring position of a person using Camera Image." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2018 (2018): 1P1—C08. http://dx.doi.org/10.1299/jsmermd.2018.1p1-c08.

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28

Treier, Shawn. "Where Does the President Stand? Measuring Presidential Ideology." Political Analysis 18, no. 1 (2010): 124–36. http://dx.doi.org/10.1093/pan/mpp035.

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Although estimating the revealed preferences of members of Congress is straightforward, estimating the position of the president relative to Congress is not. Current estimates place the president as considerably more ideologically extreme than one would expect. These estimates, however, are very sensitive to the set of presidential positions used in the roll call analyses for the 103rd through 109th Congresses. The president often obtains more moderate ideal point estimates relative to Congress when including positions based on signing bills into law.

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29

Kirstukas, S. J., J. L. Lewis, and A. G. Erdman. "6R Instrumented Spatial Linkages for Anatomical Joint Motion Measurement—Part 2: Calibration." Journal of Biomechanical Engineering 114, no. 1 (February 1, 1992): 101–10. http://dx.doi.org/10.1115/1.2895432.

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The six-revolute-joint instrumented spatial linkage (6R ISL) is often the measurement system of choice for monitoring motion of anatomical joints. However, due to tolerances of the linkage parameters, the system may not be as accurate as desired. A calibration algorithm and associated calibration device have been developed to refine the initial measurements of the ISL’s mechanical and electrical parameters so that the measurement of six-degree-of-freedom motion will be most accurate within the workspace of the anatomical joint. The algorithm adjusts the magnitudes of selected linkage parameters to reduce the squared differences between the six known and calculated anatomical position parameters at all the calibration positions. Weighting is permitted so as to obtain a linkage parameter set that is specialized for measuring certain anatomical position parameters. Output of the algorithm includes estimates of the measuring system accuracy. For a particular knee-motion-measuring ISL and calibration device, several interdependent design parameter relationships have been identified. These interdependent relationships are due to the configuration of the ISL and calibration device, the number of calibration positions, and the limited resolution of the devices that monitor the position of the linkage joints. It is shown that if interdependence is not eliminated, then the resulting ISL parameter set will not be accurate in measuring motion outside of the calibration positions, even though these positions are within the ISL workspace.

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30

Stafilidis, Savvas, and Carina Kopper-Zisser. "Ankle joint rotation and exerted moment during plantarflexion dependents on measuring- and fixation method." PLOS ONE 16, no. 8 (August 31, 2021): e0253015. http://dx.doi.org/10.1371/journal.pone.0253015.

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We examined the effect of ankle joint fixation vs increased foot pressure (aiming to reduce dynamometer-subject elasticity (DSE)) on the exerted moment during plantarflexion contraction. We also examined the joint rotation in dependence of the measuring site (forefoot, rearfoot) and the foot condition (fixed, free). We hypothesized higher exerted moments due to reduced DSE compared to fixed condition and an effect of fixation on the joint rotation in dependence of the measuring site. Fourteen healthy individuals (28.7±6.9y) completed in randomized order maximal isometric plantarflexions in four different positions (0-3-6-9 cm) and two ankle joint conditions (fixed-free). Kinematics of the rear- and forefoot were obtained synchronously. We found higher moment in the fixed compared to the free condition at all positions. The maximum moment in the fixed condition did not differ at any position. At the fixed condition, the forefoot rotation did not differ at any position (~5°) while at free condition we observed a significant rotation reduction (form ~12 to ~5°). The rearfoot rotation did not differ between conditions at any position while a significant joint angle reduction was observed (~10 to ~6° and ~12 to ~6°; fixed-free respectively). The results indicate that with appropriate foot fixation the maximum moment can be achieved irrespective of the position. With the foot secured, the measuring site influences the rotational outcome. We suggest that for a minimization of the joint rotation a fixation and the forefoot-measuring site should be preferred. Additionally, for unconstrained foot kinematic observations both measuring sites can be obtained.

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31

Wang, Sen, Shugui Liu, and Qing Mao. "Control Point Position Calibration for Light Pen Coordinate Measuring System." E3S Web of Conferences 206 (2020): 03026. http://dx.doi.org/10.1051/e3sconf/202020603026.

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Light pen coordinate measuring system is a kind of vision-based portable coordinate measuring technique. It implements coordinate measuring by analyzing the image of light pen, which has several control points. With the relative positons of the control points determined and the pixel coordinates of their image points acquired by image processing, the posture of light pen can be obtained by solving perspective- n-point problem. Therefore, the control point positons serve as the measuring basis of the whole system. However, the accuracy of existing calibration methods is not satisfactory. In this paper, a new method of control point positon calibration, which utilizes traditional coordinate measuring machine, is proposed. The light pen is fasten to the measuring arm of a coordinate measuring machine and moves along a three dimensional grid route driven by the machine. A stationary camera is located in front of the machine to capture the image of light pen at each node of the route. For each control point, an individual coordinate system is established. Then the relative positions of control points can be transformed into the differences of a series of translation vectors. Experiments show that, with the proposed method, the accuracy of light pen coordinate measuring system can reach 30m within 10 meters.

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32

Nagaoka, Kotaro, Atsushi Matsubara, Tomoya Fujita, and Tomonori Sato. "Analysis Method of Motion Accuracy Using NC System with Synchronized Measurement of Tool-Tip Position." International Journal of Automation Technology 3, no. 4 (July 5, 2009): 394–400. http://dx.doi.org/10.20965/ijat.2009.p0394.

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This paper describes a method of measuring and analyzing the motion accuracy of NC machine tools. A practical method of measuring the motion accuracy is required for the achievement of high precision machining. The motion accuracy of NC machine tools becomes an issue, as motion error emerges while a continuous path control is applied. Error is caused by several factors. In order to determine the effects of each cause, it is necessary to measure the differences among reference positions, feedback positions, and tool tip positions. Thus, a system of measurement that achieves synchronized acquisition of each of the aforementioned positions has been developed. The system is composed of the NC system, which can manage the reference position and the feedback position, and an additional sensor data acquisition system, which receives the tool tip position. A method of analyzing the acquired data to determine the motion accuracy is also proposed. Experimental results show the effectiveness of the proposed method.

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33

Wang, Sen, Shugui Liu, and Qing Mao. "A CMM-Based Method of Control Point Position Calibration for Light Pen Coordinate Measuring System." Sensors 20, no. 19 (September 29, 2020): 5592. http://dx.doi.org/10.3390/s20195592.

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A light pen coordinate measuring system (LPCMS) is a kind of vision-based portable coordinate measuring technique. It implements coordinate measurement by analyzing the image of a light pen, which has several control points and a probe. The relative positions of control points need to be determined before measurement and serve as the measuring basis in LPCMS. How to accurately calibrate the relative positions of control points is the most important issue in system calibration. In this paper, a new method of control point position calibration based on a traditional coordinate measuring machine (CMM) is proposed. A light pen is fastened to the measuring arm of a CMM and performs accurate translational movement driven by the CMM. A camera is used to capture the images of control points at different positions, and the corresponding readings of the CMM are recorded at the same time. By establishing a separate coordinate system for each control point, the relative positions of the control points can be transformed to the differences of a series of translation vectors. Experiments show that the calibration repeatability of control point positions can reach 10 μm and the standard deviation of measurement of the whole LPCMS can reach 30 μm. A CMM is used to generate accurate translation, which provides a high accuracy basis of calibration. Through certain mathematical treatment, tremendous data acquired by moving the light pen to tens of thousands of different positions can be processed in a simple way, which can reduce the influence of random error. Therefore, the proposed method provides a high-accuracy solution of control point position calibration for LPCMS.

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34

Weiner-Ogilvie, S., and K. Rome. "The reliability of three techniques for measuring foot position." Journal of the American Podiatric Medical Association 88, no. 8 (August 1, 1998): 381–86. http://dx.doi.org/10.7547/87507315-88-8-381.

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The reliability of three commonly used techniques for measuring foot position--valgus index, navicular height, and arch height--was evaluated in a study involving 20 healthy subjects. The results demonstrated significant differences (P < .05) between two observers for all three techniques, although there were no significant differences between two visits for the same observer (P < .05). Secondary analysis demonstrated that navicular height yielded the highest degree of intraobserver and interobserver agreement. The results suggest that there is a wide variation in foot position in the general population, and that measurement error may result from difficulties in defining foot position, techniques used, and instrumentation.

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35

Malpeli, Joseph G. "Measuring eye position with the double magnetic induction method." Journal of Neuroscience Methods 86, no. 1 (December 1998): 55–61. http://dx.doi.org/10.1016/s0165-0270(98)00145-9.

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36

Caparka, Zbynek A. "System for measuring position using electronic or ultrasonic devices." Journal of the Acoustical Society of America 90, no. 3 (September 1991): 1705. http://dx.doi.org/10.1121/1.401748.

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37

ABE, Yuji, Kenichi OHARA, Tomohito TAKUBO, Yasushi MAE, Tamio TANIKAWA, and Tatsuo ARAI. "2A1-H11 Position Estimation Method Using RSSI Measuring Sensors." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2009 (2009): _2A1—H11_1—_2A1—H11_4. http://dx.doi.org/10.1299/jsmermd.2009._2a1-h11_1.

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38

Shokair, Isaac R. "Measuring axially varying beam position using B‐dot monitors." Review of Scientific Instruments 60, no. 9 (September 1989): 2969–74. http://dx.doi.org/10.1063/1.1140637.

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39

White, Richard M., and Stuart Wenzel. "Ultrasonic position sensor for measuring movement of an object." Journal of the Acoustical Society of America 99, no. 5 (1996): 2639. http://dx.doi.org/10.1121/1.414831.

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40

Ray, Barbara Marotz. "Measuring the Social Position of the Mainstreamed Handicapped Child." Exceptional Children 52, no. 1 (September 1985): 57–62. http://dx.doi.org/10.1177/001440298505200107.

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41

Cason, Carolyn L., and Corinne W. Lambert. "Position and reference level for measuring right atrial pressure." Critical Care Nursing Quarterly 12, no. 4 (March 1990): 77–86. http://dx.doi.org/10.1097/00002727-199003000-00013.

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42

Carson, C. L., and C. W. Lambert. "Position and reference level for measuring right atrial pressure." Dimensions of Critical Care Nursing 9, no. 4 (July 1990): 223–49. http://dx.doi.org/10.1097/00003465-199007000-00017.

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43

Akkoyun-Farinez, Julie, Abdou Y. Omorou, Johanne Langlois, Elisabeth Spitz, Philip Böhme, Marie-Hélène Quinet, Laura Saez, et al. "Measuring adolescents’ weight socioeconomic gradient using parental socioeconomic position." European Journal of Public Health 28, no. 6 (April 13, 2018): 1097–102. http://dx.doi.org/10.1093/eurpub/cky064.

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44

Durst, F., R. Müller, and J. Jovanovic. "Determination of the measuring position in laser-Doppler anemometry." Experiments in Fluids 6, no. 2 (January 2004): 105–10. http://dx.doi.org/10.1007/bf00196460.

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45

Cen, Wu, and Li Xia Xia. "Study on the Engine Speed Sensor Position Measuring Tool Based on Minitab." Applied Mechanics and Materials 456 (October 2013): 211–15. http://dx.doi.org/10.4028/www.scientific.net/amm.456.211.

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Research on key position speed sensor of automobile engine size measuring tool as an example, for studying the optimization of measuring tools through use the powerful Minitab software statistics, analysis and calculation functions. Randomly selected 10 parts as a measurement sample, then obtained the measurement data by experiment. Analysis of the measured data with Minitab and calculate the repeatability and reproducibility of the device. Find the causes of failure in measuring and explore how to optimize the measuring method. Improved measuring clamp structure, and through experiments verify its feasibility. Thereby solving the problem of measuring failure to ensure the accuracy of measurement data, and improve the measurement accuracy of the product.

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46

Tuijthof, Gabrielle J. M., Just L. Herder, Peter E. Scholten, C. Niek van Dijk, and Peter V. Pistecky. "Measuring Alignment of the Hindfoot." Journal of Biomechanical Engineering 126, no. 3 (June 1, 2004): 357–62. http://dx.doi.org/10.1115/1.1762897.

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In subtalar arthrodesis operations, correction of the hindfoot alignment is performed in about half of the cases. To improve the quality of the operation, a measurement system was developed which reliably measures the hindfoot angle pre-, per-, and postoperatively. This device was evaluated by measuring subjects in standing weightbearing position and in prone nonweightbearing position. The results were compared with hindfoot angles constructed on posterior photographic images. The results are similar to other studies (all maximum values): intratester accuracy 1.4°, intertester accuracy 2.2°, intratester reliability 0.9, and intertester reliability 0.74. The proposed device will improve the quality of correction, because it enables peroperative measurement of hindfoot alignment.

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47

Ariga, T., S. Aghion, O. Ahlén, C. Amsler, A. Ariga, A. S. Belov, K. Berggren, et al. "Measuring GBAR with emulsion detector." International Journal of Modern Physics: Conference Series 30 (January 2014): 1460268. http://dx.doi.org/10.1142/s2010194514602683.

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The motivation of the AEgIS experiment is to test the universality of free fall with antimatter. The goal is to reach a relative uncertainty of 1% for the measurement of the earth's gravitational acceleration [Formula: see text] on an antihydrogen beam. High vertex position resolution is required for a position detector. An emulsion based detector can measure the annihilation vertex of antihydrogen atoms with a resolution of 1-2 μm, which if realized in the actual experiment will enable a 1% measurement of [Formula: see text] with less than 1000 [Formula: see text] atoms. Developments and achievements on emulsion detectors for the AEgIS experiment are presented here.

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48

Martin, K. F., and H. Lockman. "Force Sensing in Magnitude, Direction, and Position." Journal of Dynamic Systems, Measurement, and Control 109, no. 3 (September 1, 1987): 286–90. http://dx.doi.org/10.1115/1.3143856.

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A sensing device is described which measures the magnitude, direction, and position of force in the plane of the sensor. The basic sensing method is by strain gauge bridges, the outputs of which are amplified and fed via Analogue to Digital (A/D) converters to a microcomputer for calculation of the force characteristics. The transducer system is shown to be capable of measuring quasi static forces; experimental measurements confirming the feasibility of the device. Further research work is planned to improve the accuracy of the system and to ascertain and improve its capability of measuring dynamic forces.

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49

Angelo, J. E., and M. J. Mills. "A new technique for measuring the separation of closely spaced dislocations using residual-contrast conditions." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 902–3. http://dx.doi.org/10.1017/s0424820100172243.

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In order to measure the spacing of closely spaced dislocations, a method with sufficient spatial resolution must be used. High resolution imaging provides one method of determining the spacing of paired dislocations, but care must be taken since these authors have shown that thin film effects can give rise to structures not present in bulk materials. To date, the most widely used method of determining the spacing of paired dislocations is the weak-beam dark field method. This method has proved extremely useful in the study of many systems, see Cockayne3 for a review. One of the difficulties of the weak-beam method is that the observed peak positions do not generally correspond to the actual position of the partial dislocation cores. Correlation of the peak positions with the true position depends on the deviation parameter, foil thickness, and position of the dislocations within the foil.

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50

Luo, Wenting, Lexuan Liu, and Lin Li. "Measuring rutting dimension and lateral position using 3D line scanning laser and inertial measuring unit." Automation in Construction 111 (March 2020): 103056. http://dx.doi.org/10.1016/j.autcon.2019.103056.

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