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Dissertations / Theses on the topic 'Stress measurement'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Hernandez, Rivera Javier. "Towards wearable stress measurement." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101849.

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Thesis: Ph. D., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 206-220).<br>Chronic psychological stress carries a wide array of pathophysiological risks, including cardiovascular and cerebrovascular diseases, diabetes, and immune dysregulation. An important step in managing stress, before it becomes chronic, is recognizing precisely when and where it occurs. This thesis creates and evaluates new methods to improve the measurement of stre

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2

Arza, Valdés Adriana. "Measurement of acute psychological stress." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/458131.

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La incidencia de la ansiedad, depresión, epilepsia, esclerosis múltiple, estrés patológico, así como otras enfermedades relacionadas con el estrés, ha aumentado significativamente en los últimos años, probablemente debido los cambios drásticos en el modo de vida actual. Según la OMS, los problemas tanto sociales como médicos asociados al estrés están claramente en aumento, afectando seriamente la salud mental y el bienestar no sólo de adultos, sino también de jóvenes y niños. Actualmente hay una mayor conciencia respecto al estrés, precisamente por la importancia que tiene desde el punto de vi

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3

Li, Fang. "Study of stress measurement using polariscope." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34762.

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The goal of this research was to investigate an experimental infrared transmission technique to extract the full stress components of the in-plane residual stresses in thin multi crystalline silicon wafer, and try to meet the need of photovoltaic industry to in situ measure residual stress for large cast wafers.

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4

Ghidini, Davide. "Accurate Portable Residual Stress ESPI Measurement Device." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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An Electronic Speckle Pattern Interferometer residual stress measurement device based on the hole-drilling technique was designed and built: by carefully design both the mechanical and the optical systems, it has been possible to achieve very nice measurement results, with a compact and cheap device, which promise great on-field capabilities but also large room for further improvement.

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5

Anderoglu, Osman. "Residual stress measurement using X-ray diffraction." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1507.

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This paper briefly describes the theory and methods of x-ray residual stress measurements. Residual stresses can be defined as the stresses which remain in a material in the absence of any external forces. There are many stress determination methods. Some of those methods are destructive and some are nondestructive. X-ray residual stress measurement is considered as a nondestructive method. X-ray diffraction together with the other diffraction techniques of residual stress measurement uses the distance between crystallographic planes as a strain gage. The deformations cause changes in the spac

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6

Charsley, Andrew Darrin. "Interpretation of sleeve fracturing for stress measurement." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0010/MQ61252.pdf.

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7

Hodgson, David Zhuang. "Residual stress measurement across different length scales." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544354.

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8

Godin, Michael A. (Michael Alan). "Mobile neutron sources for residual stress measurement." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28105.

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9

Jo, Jinmyun. "Residual stress measurement in railroad car wheels." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54206.

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A new failure criterion for discriminating good and bad (overheated) railroad car wheels is proposed. This criterion can replace the conventional “four inch" discoloration rule. The procedure for the new discrimination criterion is based on the fluctuations of the azimuthal residual stress in the tread of the wheel. This criterion is based on a maximum likelihood statistical analysis of data obtained from six different wheels as deterrmined by x-ray diffraction. Of these locations, the analysis showed the tread, and perhaps a critical point on the top of the flange, to be the most sensitive to

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10

Woolard, Deonna Faye. "Thermoelastic and photoelastic full-field stress measurement." W&M ScholarWorks, 1999. https://scholarworks.wm.edu/etd/1539623969.

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Photoelasticity is an optical technique that measures the difference of the principal stresses plus the principal stress direction. A complementary technique is thermoelasticity which measures the sum of the principal stresses. Combining these two full-field, non-contact nondestructive evaluation techniques allows the individual stress components to be measured. One of the main difficulties in merging these two measurement systems is in identifying an appropriate surface coating. Thermoelasticity demands a highly emissive surface, while photoelasticity requires a thick, stress-birefringent, tr

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11

An, Yuntao. "Residual stress measurement using cross-slitting and ESPI." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5028.

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Residual stresses are “locked-in” within a material, and exist without any external loads. Such stresses are developed during most common manufacturing processes, for example welding, cold working and grinding. These “hidden” stresses can be quite large, and can have profound effects on engineering properties, notably fatigue life and dimensional stability. To obtain reliable and accurate residual stress measurements for uniform and non-uniform stress states, a novel and practical method using crossing-slitting and ESPI is presented here. Cross-slitting releases all three in-plane stress compo

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12

Lewis, Bridget A. "Measurement of stress in weldments by magnetoacoustic emission." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360391.

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13

Garrett, Sandy 1945. "A Study of College Stress and Its Measurement." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc331438/.

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The purpose of the study was to compare the academic stress of freshmen in a community college with that of freshmen in a university. An additional purpose was to determine if gender, ethnicity, or semester course load was related to perceived academic stress. The sample consisted of a total of 303 university and community college freshmen from English and Psychology classes at the University of North Texas and Richland Community College during the spring semester, 1989. The instrument that was administered to these volunteer students was the Academic Stress Test, a 35-item checklist of possi

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14

Andersson, David. "Real-time ECG for objective stress level measurement." Thesis, Linköpings universitet, Institutionen för medicinsk teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139217.

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Today’s endeavor of performance and accomplishment might bring more efficiency in many ways, but it has a price. Stress related diseases have increased in numbers the last decades and the field of stress is an exceptionally live issue. Linkura is a company which partly works towards identifying and decreasing stress. To be able to monitor and detect stress in people’s daily life, an ECG-device is used. This thesis is divided into two parts. The first part consisted of analyzing and comparing four different ECG based stress measures. These stress measures were RMSSD, Heart Rate, high frequency

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15

Rahman, Azlan Abdul. "Instrumented inclusion technique for stress measurement in concrete structures." Thesis, University of Surrey, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317251.

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16

Bourke, Mark A. M. "Residual stress measurement in engineering components by neutron diffraction." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47782.

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17

Kelly, Harold Lorain Jr 1958. "Remote measurement of turf water stress and turf biomass." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276995.

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Increasing irrigation efficiency on turfgrass could help reduce water consumption on large turf facilities. Two experiments were conducted using perennial ryegrass (Lolium perenne (L.) Derby) to evaluate the potential of using remote sensing to estimate turf water status, predict daily evapotranspiration (ET), and estimate turf biomass. In the first experiment a crop water stress index, utilizing remotely sensed canopy temperature, were used to schedule irrigations on 6 of 10 drainage lysimeters. Three of the remaining lysimeters were irrigated used on meteorological estimates of ET calculated

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18

Utsunomiya, Tomoaki. "NONDESTRUCTIVE STRESS MEASUREMENT OF CARBON STEELS UTILIZING MAGNETO-STRICTION." Kyoto University, 1990. http://hdl.handle.net/2433/74567.

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19

Tanner, Amy Vivien. "Detection and measurement of stress hormones with mass spectrometry." Thesis, University of Greenwich, 2012. http://gala.gre.ac.uk/9155/.

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The purpose of this thesis was to develop and validate a liquid chromatography mass spectrometry (LC-MS) method to measure salivary cortisol and testosterone. Furthermore, to use this method to analyse saliva samples collected during an exercise study measuring the hormonal response to acute exercise. The ongoing contribution to knowledge provided by this research is the application of a developed and validated LC-MS method to analysis of cortisol from pre and post exercise saliva samples, and evaluation of the cortisol and testosterone response to three different training sessions; including

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20

Lane, Andrew Michael. "Mood and sport : conceptual, measurement and performance issues." Thesis, Brunel University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299118.

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21

Shaffer, Damon M. "Reynolds stress measurements downstream of a turbine cascade." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/45735.

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An experimental investigation was performed to measure Reynolds stresses in the turbulent flow downstream of a large-scale linear turbine cascade. A rotatable X-wire hot-wire probe that allows redundant data to be taken with solution for mean velocities and turbulence quantities by least-squares fitting procedures was developed. This measurement technique was verified in a fully-developed turbulent pipe flow; the results show the accuracy of the probe when used in an end-flow orientation at various incidence angles and with a multiple number of angular settings. Traverses with a single hot-wi

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22

Abraham, Colin. "Hole-drilling residual stress measurement in an intermediate thickness specimen." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37744.

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The hole-drilling method for measuring residual stresses is generally applied to two extreme cases. In the “thick” case, the specimen depth is very large compared with the hole depth. The far boundary is then sufficiently distant that its effect can be neglected. In the “thin” case, the specimen has the form of a thin plate through which the hole penetrates fully. The thin plate creates plane-stress conditions and it is usually assumed that the associated residual stresses are uniform through the plate thickness. This research focuses on the intermediate case where the specimen has a thic

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23

Momayezzadeh, Mohammed. "Stress memory measurement using the Kaiser effect of acoustic emission." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41156.

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This thesis investigates in detail the stress memory of hard rocks under uniaxial compressive conditions as a time-saving and inexpensive alternative to traditional in-situ stress measurement techniques. Extensive laboratory experiments are carried out to assess the influence of parameters such as transducer/amplifier frequency response, signal definition parameters, stress rate, strain rate, specimen size, stress level, delay time, temperature, water content, confining pressure, and directional loading on the Kaiser Effect of Stanstead granite and other rock types. Based on these findings and

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24

Allen, Naomi. "MEMS sensors for wall shear stress and flow vector measurement." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2182/.

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The accurate measurement of airflows is an important area of experimental aerodynamics. MEMS technology has been applied to the measurement of wall shear stress and freestream velocity vectors. Existing methods of measuring wall shear stress vary greatly and have different strengths and weaknesses, making them each applicable to specific situations. Probes designed for measuring 3D velocity components are relatively large in diameter, introducing significant disturbances into the airflow. The tip diameters of such probes are typically of the order of several millimetres and the minimum diamete

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25

Goudar, Devkuma Murugesh. "Quantifying uncertainty in residual stress measurement using hole drilling techniques." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549436.

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26

Soare, Sorin. "Design of a rotating sensor for stress measurement in metallisation." Thesis, University of Newcastle Upon Tyne, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403664.

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27

Traore, Yeli. "Controlling plasticity in the contour method of residual stress measurement." Thesis, Open University, 2013. http://oro.open.ac.uk/54680/.

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The contour method has emerged as a promising technique for residual stress measurement in relatively large, thick and complex engineering components. The method involves making a cut in the sample of interest, measuring the subsequent relaxed deformation profile of the cut surface and using this profile to back-calculate the original out-of-plane residual stress field by finite element modelling. The method is based on the theory of elasticity in that the stress relaxation during test specimen cutting is assumed to be entirely elastic. However, when measuring residual stresses of magnitude ap

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28

Friedrich, Anett, Astrid Ziemann, and Uwe Schlink. "Measurement and modelling of the cumulated thermal stress in Leipzig." Universität Leipzig, 2010. https://ul.qucosa.de/id/qucosa%3A16364.

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This paper shows first results of mobile measurements, which carried out in summer 2009 to evaluate the thermal comfort for a „standardized‟ pedestrian in several urban areas of Leipzig. The analysis of the obtained data was conducted by calculating the mean radiant temperature as well as the Predicted Mean Vote (PMV). The results were compared to simulations applying the RayMan-program. Additionally to these findings to short-term stress, a study to the cumulated thermal stress was implemented into the analysis for the first time. Thereby, the thermal stress was considered which is perceived

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29

O’Donohue, Josephine. "Stress resilience : meaning, measurement, and the effects of physical activity." Thesis, Federation University Australia, 2020. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/178784.

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In rodent models of human behaviour, physical activity builds stress resilience. In contrast, human studies physical activity and stress resilience have been limited, and when investigated, provided mixed results. These inconsistencies may be due to the ambiguous use of the term stress resilience in human studies, making it difficult to quantify. Therefore, I aimed to assess the effect of physical activity on stress resilience in humans, after first evaluating operational definitions of stress resilience. Initially, I evaluated the use of stress resilience across the literature to provide a de

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30

Nälsén, Cecilia. "Measurement and evaluation of antioxidant status and relation to oxidative stress in humans /." Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6742.

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31

Birnie, J. "Raman microscope determination of stress distributions in chromium oxide scales." Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234525.

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32

Stout, Tyler. "Multilevel modeling issues and the measurement of stress is multilevel data." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2979.

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Multilevel datasets are commonly used and increasingly popular in research in the organizational and other social sciences. These models are complex and have many elements beyond those found in more traditional linear models. However, research on how multilevel models perform is lacking. The current paper examined the impact of common factors (average cluster size, cluster size distribution, average number of clusters, strength of the intraclass correlation coefficient, and effect sizes of individual and cluster level variables, and their interaction) in multilevel datasets. Monte Carlo data s

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33

Sully, John Paul. "Measurement of in situ lateral stress during full-displacement penetration tests." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/32011.

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The thesis considers the problem of the in situ measurement of horizontal stress with specific reference to the use of full displacement probes. It is generally accepted that correct measurement of the horizontal stress in situ should be performed under conditions of no disturbance since, depending on the soil characteristics, even small amounts of disturbance can significantly alter the in situ conditions. The self-boring pressuremeter is widely acknowledged to be the best available instrument for measuring horizontal stress but recent research has shown the data obtained to be very sensiti

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34

Anderson, David Graeme. "Measurement and treatment of oxidative stress in chronic obstructive pulmonary disease." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/29353.

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This thesis covers three studies. First of all the reproducibility of non invasive biomarkers was assessed and then a cross sectional study of these biomarkers was carried out. Finally a study of the impact of an inhaled anti oxidant on health status and non invasive biomarkers in subjects with COPD was carried out. In 47 subjects, total cell counts and macrophage differential counts were reproducible but not neutrophil and eosinophil differentials. IL-8 and VGEF but not IL-1β and IL-6 demonstrated reproducibility in induced sputum supernatant. Exhaled breath condensate was measured in 24 subj

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35

Höpfl, Wolfgang. "Measurement of normal stress in polymer solutions via digital image analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0033/NQ65459.pdf.

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36

Hopfl, Wolfgang. "Measurement of normal stress in polymer solutions via digital image analysis." Thesis, University of New Brunswick, 2000. http://hdl.handle.net/1882/399.

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37

McNally, Donal Stewart. "Pressure measurement in the investigation and treatment of urinary stress incontinence." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253561.

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38

Dutta, Monojit. "Residual stress measurement in engineering materials and structures using neutron diffraction." Thesis, Open University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301945.

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39

Kupshik, Gary Allan. "The measurement and management of stress related difficulties in primary care." Thesis, University of Hertfordshire, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268071.

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40

Neville, Rachel Frances. "Non-invasive measurement of oxidative stress in senior and exercising horses." Thesis, De Montfort University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275541.

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41

Kingston, Edward James. "Advances in the deep-hole drilling technique for residual stress measurement." Thesis, University of Bristol, 2004. http://hdl.handle.net/1983/af2b2d1f-d751-4497-98bf-45685f156d5f.

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Most engineering components contain defects (e. g. cavities and cracks) which are usually generated during the manufacture process. During the service life of the component it is possible that the defects could grow leading to ultimate failure of the component. For safety critical engineering components, such as those used in nuclear power plant systems, rail track systems and aerospace systems, ultimate failure is not permitted. To eliminate failure, the structural integrity of the component is assessed using knowledge of both the applied and residual stress distributions present. The applied

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42

Jones, Martyn C. "The nature, measurement and management of student nurse stress, distress and coping." Thesis, University of St Andrews, 1998. http://hdl.handle.net/10023/7279.

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Following a review of the stress, distress and coping reported by student health professionals and students in higher education, see Chapters 2 and 3, the hypothesis that a problem existed with distress early in training was confirmed by screening two cohorts of first year student nurses, see Chapter 4. Some 50.5% of students, in Cohort one (N=109, Week 40) and 67.9% of students in Cohort two (N=111, Week 24) suffered significant levels of affective distress. All students were enrolled on the newly implemented 1992 scheme of nurse education in Tayside. The underlying dimensions of situational

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43

Bedford, Lee. "The Revised Stress-Related Growth Scale: Improving the Measurement of Posttraumatic Growth." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157646/.

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This study evaluated a revised version of the Stress-Related Growth Scale (SRGS-R). The SRGS-R has two major differences from the Stress-Related Growth Scale (SRGS). It uses neutral wording of items instead of the original positively worded items, and it uses positive and negative scaling choices. This study included participants (N = 764) recruited through Amazon MTurk. There were three versions of the SRGS-R tested - the SRGS with neutral wording of items only (SRGS-R-N), the SRGS with positive and negative scaling only (SRGS-R-S), and the SRGS-R, with both changes. We randomly assigned part

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Knowles, Craig Russell. "Residual stress measurement and structural integrity evaluation of SLM Ti-6Al-4V." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/13845.

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Includes bibliographical references.<br>The constant drive toward cleaner, more powerful and more efficient jet turbines in the aerospace industry has narrowed the gap between the aircraft performance envelope requirements and the material limits. The most advanced turbine engines are incredibly complex in design and the weight-saving requirements have placed significant pressure on material capabilities and the manufacturing systems. The next generation of manufacturing methodologies are being developed in the Additive Manufacturing (AM) arena from which Selective Laser Melting (SLM) has emer

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45

He, Lingfeng. "ULTRASONIC STRESS MEASUREMENT BY USE OF LASER DOPPLER VELOCIMETRY FOR RAYLEIGH WAVES." Kyoto University, 1999. http://hdl.handle.net/2433/181801.

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Mason, Ashley Elizabeth. "Perceptions of Psychological and Physiological Stress Responses: Process, Accuracy, and Measurement Convergence." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/297046.

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Encountering stressors, both chronic and acute, is ubiquitous to the human experience. From a layperson perspective, it should not be difficult to perceive whether someone is experiencing emotional stress: People rely on intuition to modify their interpersonal behavior in order to ensure smooth social interactions. From a research perspective, determining whether someone is experiencing an emotion is more complex. The majority of available evidence indicates that dimensions of emotional responding - physiological, psychological, and behavioral - are largely uncorrelated, which suggests potenti

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田中, 啓介, Keisuke TANAKA, 賢一水野 та ін. "シリコン単結晶の重回帰分析を用いたX線応力測定". 日本機械学会, 2006. http://hdl.handle.net/2237/9153.

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48

Meritt, Ryan James. "Skin Friction Sensor Design Methodology and Validation for High-Speed, High-Enthalpy Flow Applications." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54569.

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This investigation concerns the design, build, and testing of a new class of skin friction sensor capable of performing favorably in high-speed, high-enthalpy flow conditions, such as that found in atmospheric re-entry vehicles, scramjets, jet engines, material testing, and industrial processes. Fully understanding and optimizing these complex flows requires an understanding of aerodynamic properties at high enthalpies, which, in turn, requires numerical and analytical modeling as well as reliable diagnostic instrumentation. Skin friction is a key quantity in assessing the overall flight and

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49

Davis, Samantha. "The measurement invariance and measurement equivalence of the sources of work stress inventory (SWSI) across gender groups in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95741.

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Thesis (MCom)--Stellenbosch University, 2014.<br>You will be needing the program SPSS in order to read the .spv files<br>ENGLISH ABSTRACT: The primary goal of an organisation, in a capitalistic system, is the maximisation of profit. The task of the human resource function in organisations is to affect the work performance of working man to the advantage of the organisation and in a manner that adds value to the organisation. The management of employee wellbeing/psychological health is one of the human resource interventions with which the human resource function pursues this objective. It

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Dib, Tamara S. "Relationship between Anisotropy and Dispersive Stress in Wind Plants with Variable Spacing." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4335.

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Large eddy simulations are considered for wind plants with varied spanwise and streamwise spacing. Data from five different configurations of staggered and aligned LES wind turbine arrays with a neutrally stratified atmospheric boundary layer are employed for analysis. Fields are analyzed by evaluating the anisotropy stress invariants based on the Reynolds shear stresses and dispersive stress tensor. The relationship between quantities are drawn as a function of the wind plant packing. Reynolds stresses and dispersive stresses are investigated alongside a domain altered version of the second a

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