To see the other types of publications on this topic, follow the link: Measuring Reliability.
Dissertations / Theses on the topic 'Measuring Reliability'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Measuring Reliability.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Bain, Stella Anne. "Measuring interrogative suggestibility : questions of reliability and validity." Thesis, University of Strathclyde, 2002. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21187.
Full textAbstract:
Gudjonsson developed two scales to measure interrogative suggestibility: Gudjonsson Suggestibility Scales I and 2 (GSS I and GSS 2; Gudjonsson, 1984a; 1987c). The aims of the present thesis were to examine issues related to the reliability and validity of these scales. Three studies are presented. Study I assessed the effects of two interviewer styles on measures obtained on the GSS 1. The hypothesis was that a generally abrupt demeanour adopted by the interviewer would lead to higher scores than a friendly demeanour. Results showed that participants tested in the Abrupt condition gained higher scores on two of the post-feedback GSS measures than those tested in the Friendly condition. It was concluded that post-feedback scores may be more sensitive to social aspects of suggestibility than responses to leading questions. Study 2 assessed the effect of the same interviewer demeanours on a sample of adolescents, a more vulnerable population (e. g. Richardson, Gudjonsson, & Kelly, 1995). It was hypothesised that the abrupt demeanour would produce higher GSS I scores, than a friendly demeanour and that this difference would be more marked than that found for normal adults. Results did not support the hypothesis. Scores were lower in the Abrupt condition; this difference was significant for post-feedback responses to leading questions. It was concluded that results provided further evidence that GSS scores are not readily predictable. Study 3 aimed to investigate indicators of "faking bad" on the GSS. It was hypothesised that participants instructed to fake suggestibility would demonstrate a unique scoring pattern. Results supported the hypothesis. It was concluded that an elevated pre-feedback score in the absence of any other raised scores may indicate malingering on the GSS. Issues related to the reliability and validity of the scales are discussed.
2
Katzenbach, Ray J. "Measuring Growth: The Reliability and Validity of the Utah Recovery Scale." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3561.
Full textAbstract:
Recently the direction of consumer mental health care in the United States has shifted in terms of its approach to recovery. In this sense recovery is not thought to be a complete amelioration of symptoms, but rather the acquisition of meaningful relationships, independent living, and fulfilling work. In response to these changes, the Utah division of the National Alliance for the Mentally Ill (NAMI-Utah) conducted consumer focus groups for the purpose of developing a tool to monitor this new conceptualization of recovery. The focus groups generated 10 recovery indicators based on recovery as the Substance Abuse and Mental Health Services Administration have defined it. This study explored initial psychometric reliability and validity estimates for these recovery indicators and their ability to track changes in recovery over time. In addition, the study also explored the relationship between distress reduction and recovery both concurrently and over time.
3
Schil, Mickaël (Mickaël René Jerôme). "Measuring journey time reliability in London using automated data collection systems." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74273.
Full textAbstract:
Thesis (S.M. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. 161-162).<br>Service reliability is critical for both users and operators of transit systems. The rapid spread of Automated Data Collection Systems, such as Automated Fare Collection (AFC) and Automatic Vehicle Location (AVL), provides new sources of information that can be used to measure and assess service reliability. The main objective of this thesis is to develop a set of simple, customer-driven metrics of journey time reliability, that could be useful and meaningful for both customers and operators. The set of metrics are consistent across transit modes (rail and bus networks). The proposed methodology, common to rail and bus systems, consists of (1) an analysis of the journey time distributions at the finest spatial and temporal resolution, the origin-destination pair (O-D) and time period level (customer perspective), (2) the aggregation of the reliability metrics at the line (route) level (operator perspective), and (3) the definition of journey time reliability standards at the O-D pair and time period level, by the identification of a representative "good" journey time distribution (both customer and operator perspective). For fully gated transit systems, like the London Underground, AFC data provides direct travel time measures for every journey from the fare gate at the entry station to the fare gate at the exit station. For non-gated systems, such as many bus networks, no information is available on passengers' arrival times at the origin bus stop. A method that combines AVL and AFC data is proposed to estimate waiting times at stops so that they can be included in the journey time reliability calculation. Furthermore, the method accounts for the multiple overlapping routes that sometimes serve the same O-D pairs. The proposed methodology is tested using the London public transport system as an illustration. The use of the reliability metrics for operators and customers is also discussed, with proposed modifications of the information provided by journey planners.<br>by Mickaël Schil.<br>S.M.in Transportation
4
Wood, Daniel Alden. "A framework for measuring passenger-experienced transit reliability using automated data." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99539.
Full textAbstract:
Thesis: S.M. in Transportation, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 173-175).<br>A public transport operator's ability to understand and improve service reliability experienced by passengers depends upon their ability to measure it. Traditionally, largely due to data collection limitations, passengers' experience of reliability has not been measured directly. As a result, operators often fail to effectively measure, and thus manage, key issue affecting passengers' perceived reliability. However, with the relatively recent availability of automatic data collection (ADC) systems, it has become technically feasible to measure passengers' reliability experience at a detailed level. If used in practice, passenger-experienced reliability measurement has the potential to improve public transport systems' responsiveness to passengers needs across many functional areas. This thesis develops a framework for the understanding and practical use of passenger-experienced reliability measurement on high-frequency transit systems. A model of passenger-experienced reliability based on total travel time variability is developed, and the key differences from "operational" reliability identified. This model is applied to identify public transport management functions which should be targeted as a result of passenger-experienced reliability measurement. The model and potential applications are then synthesized to develop a set of design criteria for passenger-experienced reliability metrics. Two new measures of passenger-experienced reliability are developed, both aiming to quantify the "buffer time" passengers must add to compensate for travel time variability. The first measure, derived from passengers' actual travel times from automatic fare collection (AFC) data, is essentially the median travel time variability experienced by frequent travelers over each origin-destination (OD) pair of interest. The second measure, derived from vehicle location data, OD matrices, and train load estimates, is based on a simulation of passengers' waiting, boarding, transfer, and in-vehicle travel process. This second metric is aimed at "non-gated" systems without exit AFC data, for which passengers' travel times cannot be measured directly. These two metrics are tested and evaluated using data from the Hong Kong MTR system. These metrics' response to incidents, scheduled headways, and passenger demand are tested at the OD pair and line levels. The results are used to evaluate these metrics according to the previously-developed design criteria for passenger-experienced reliability metrics. The first metric is found to be suitable for implementation (where adequate data is available), while the second is found to inadequately measure demand-related delays. An implementation guide for the AFC-based metric is developed. This guide is structured around four main implementation decisions: (1) coordination with an operator's existing metrics, (2) defining the service scope, (3) determining an appropriate frequency of calculation, and (4) defining appropriate time of day intervals and date periods. This guide is then demonstrated using a case study application from MTR: an investigation of the 2014 Hong Kong political demonstrations' impact on MTR reliability.<br>by Daniel Alden Wood.<br>S.M. in Transportation
5
Holm, Christopher David. "Reliability of the Acetylene Single-Breath Method For Measuring Cardiac Output." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/43878.
Full textAbstract:
Advances in technology have now made it possible to analyze cardiac output (Q) with only a single-breath, making measurements during exercise quicker and less invasive for the subject. Certain non-invasive techniques allow for measurement of the disappearance of a soluble inert gas as it diffuses across the blood-gas barrier in the lungs. The rate of disappearance of the gas is directly proportional to the flow of blood past the lungs and subsequently provides an estimate of pulmonary capillary blood flow (Qc), or Q. The SensorMedics® Corporation (Yorba Linda, CA) has developed a single-breath acetylene (C₂H₂) technique (SensorMedics Vmax 229TM), which includes a simple device to linearize expiratory flow rate by increasing the time by which the sensors can measure the disappearance of the marker gas and improve quantification. The purpose of this investigation was to determine the reproducibility of the C₂H₂ single-breath technique during ramping exercise testing with the addition of a starling resistor in 11 apparently healthy, sedentary volunteers (7 male and 4 female). Subjects performed three maximal ramping exercise test sessions over a 6-week period and Qc was measured at rest and at three time points during the exercise test. The C₂H₂ single-breath Qc measurement technique was shown to be repeatable when systematically related to VO₂ (Qc/VO₂ relation highly correlated r² = 0.72-.74), but slightly lower than previously reported. Means and 95% confidence intervals revealed the precision of the technique over repeated testing days. This method was able to capture Qc measurements at intensities greater than 75% VO₂pk in all subjects with the use of the Starling resistor. Bland-Altman plots reveal Qc measures to be about 50% more variable than highly reproducible measures such as VO₂ and HR. Intraclass reliability coefficients (r) found through repeated measures ANOVA were found to perform low (rx,x= -0.11-0.31) from rest throughout all intensities of exercise. This device is limited in the ability of the sensors to accurately analyze Qc with subjects who are unfamiliar and have difficulty with the single-breath maneuver. Such instances make it difficult for objective, accurate determinations to be made by the clinician. The C₂H₂ single-breath method was found to capture Qc at higher intensities and a high level of precision with the addition of the starling resistor. However, more evidence needs to be analyzed before use of this device can be put into clinical practice.<br>Master of Science
6
Wilkes, Garrett Frane. "Measuring the Reliability of the Early Expository Comprehension Assessment, Revised 3rd Edition." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6747.
Full textAbstract:
During the past several years, the Common Core State Standards has created a greater demand for students in public schools to comprehend and analyze expository text. In order to prepare students for work with expository text, beginning with kindergarten, more emphasis and standards have become prevalent in preschool classrooms as well. The Early Expository Comprehension Assessment, Revised 3rd Edition (EECA R-3) was developed to aid preschool teachers in determining what aspects of expository text a student understands, including recognition of different structure types. This study with the EECA R-3 extends previous studies using earlier iterations of the assessment. One hundred and eight children, between 3 and 5 years of age, from eight Title I classrooms and two private university preschool classrooms were administered two forms of the EECA R-3 to determine its reliability. A Many Facets Rasch Model was used to determine the reliability of the EECA R-3's test items on both forms. Results indicate that the EECA R-3 is a reliable measurement tool. Problematic items from the previous iteration of the EECA were addressed. New problematic items were acknowledged with suggestions to change instruction or scoring on said items.
7
Van, Niekerk Sjan-Mari. "Measuring the sitting posture of high school learners : a reliability and validity study /." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/480.
Full text
8
Westerlund, Per. "Condition measuring and lifetime modelling of electrical power transmission equipment." Licentiate thesis, KTH, Elektroteknisk teori och konstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-167136.
Full textAbstract:
The electric grid is important in modern society, so the outages should be few. The transmission grid should have a real high availability, since it transports electrical energy across the country. Then, it is difficult to plan outages for maintenance and installation. This thesis lists twenty surveys about failures of circuit breakers and disconnectors, with data about the cause and the lifetime. It also contains a survey of about forty condition-measuring methods for circuit breakers and disconnectors, mostly applicable to the electric contacts and the mechanical parts. As there is no published method to monitor the electric contacts at voltages around 400 kV, a system with IR sensors has been installed at the nine contacts of six disconnectors. The purpose is to avoid outages for maintenance by estimating the condition of the contacts while the disconnectors are still connected to high voltage. The measured temperatures are collected by radio and regressed against the square of the current, since the best exponent for the current was found to be 2.0. The coefficient of determination $R^2$ is high, greater than 0.9. This gives for each contact a regression coefficient, which can serve as an estimate of the condition of the contact. The higher the coefficient is, the more heat is produced at the contact, which can damage the material. This enables a ranking of the different contacts and shows which the worst ones are. This coefficient can also give a dynamic rating of the disconnector.<br>Elnätet är viktigt i det moderna samhället, så antalet avbrott bör vara lågt. Särskilt stamnätet bör ha en särskilt hög tillgänglighet, då det transporterar elektrisk energi tvärsöver landet. Då blir det svårt att planera avbrott för underhåll och utbyggnad. Denna avhandling tar upp tjugo studier av fel i brytare och frånskiljare med data om felorsak och livslängd. Den har också en översikt av ett fyrtiotal olika metoder för tillståndsmätningar för brytare och frånskiljare, som huvudsakligen rör de elektriska kontakterna och de mekaniska delarna. Eftersom det inte finns någon beskriven metod för att övervaka elektriska kontakter för spänningar på runt 400 kV, har ett system med IR sensorer installerats på de nio kontakterna på sex frånskiljare. Målet är att minska antalet avbrott för underhåll genom att skatta skicket hos kontakterna, när frånskiljarna fortfarande är kopplade till högspänning. De uppmätta temperaturerna tas emot genom radio och behandlas genom regression mot kvadraten av strömmen, då den bästa exponenten för strömmen visade sig vara 2,0. Förklaringsfaktorn $R^2$ är hög, över 0,9. För varje kontakt ger det en regressionskoefficient, som blir en skattning av kontaktens skick. Ju högre koefficienten är, desto mer värme utvecklas det i kontakten, vilket kan leda till skador på materialet. Kontakternas olika koefficienter ger en rankordning dem och därmed en möjlighet att prioritera vilken frånskiljare som ska underhållas först. Systemet kan också användas för att minska eller öka den tillåtna strömmen baserat på skicket.<br><p>QC 20150522</p>
9
Smarslok, Benjamin P. "Measuring, using, and reducing experimental and computational uncertainty in reliability analysis of composite laminates." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024834.
Full text
10
Frissora, Kimberly N. "Reliability of Measuring Voluntary Quadriceps Activation Using the Burst Superimposition and Interpolated Twitch Techniques." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1396516819.
Full text
11
Oosthuizen, Johan Christiaan. "Development of a multidimensional measuring instrument of social support / Johan Christiaan Oosthuizen." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1828.
Full textAbstract:
Social support has been proven to play a major role in the well-being of an individual. Unfortunately, the conceptualisation of the construct is vague and many authors disagree about the various properties and dimensions of the construct. Seen from a health-related perspective, social support can be regarded as divided into two main spectrums, the main-effect model and the stress-buffering model. The main-effect model proposes that social support has a beneficial effect, whether or not an individual is under stress, while the stress-buffering model proposes that social support buffers an individual from potentially pathological influences. The construct is furthermore conceptualised as consisting of distinct structural, functional and perceptual dimensions. The aim of the research was to develop an instrument which would incorporate all three of these dimensions and could be proven valid and statistically reliable.
A cross-sectional survey design was used. An availability sample of qualified educators in the North-West Province of South Africa was used. The Social Support Survey was developed as a measuring instrument and administered along with a biographical questionnaire. Descriptive statistics and inferential statistics were used to analyse the data.
Contrary to expectation, factor analysis indicated that the four factors regarding the characteristics of the support, as well as the five factors regarding the types of support, were clustered around the source of support. This might be due to the Likert-scale matrix design of the questionnaire, which required participants to answer a wide range of questions regarding the type, importance, amount, adequacy and accessibility of support.
By way of conclusion, recommendations were made.<br>Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2008.
12
Xu, Xiaoying. "Evaluation and Application of Instruments Measuring Spatial Ability and Attitude for College Chemistry Students." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5599.
Full textAbstract:
Student performance in college chemistry courses remains a concern for educators seeking to help improve the future STEM workforce. Besides math ability and prior chemistry knowledge, spatial ability and attitude toward chemistry have been considered as important factors influencing college chemistry performance. This work includes five studies and uses data collected from instruments to examine the relationships of these two factors - spatial ability and attitude - with student chemistry performance, and provides psychometric evidence for using the Purdue Visualization of Rotations test (ROT) and Attitude toward the Subject of Chemistry Inventory (ASCIv2) to measure these two factors, respectively, in college chemistry classrooms.
The first two studies are about the evaluation and application of the ROT to measure the spatial ability of college chemistry students. Study 1, Sex difference in spatial ability for college students and exploration of measurement invariance, examines whether ROT items function in the same way between sexes. This study provides evidence that the ROT is an appropriate tool to measure the mental rotation component of spatial ability for college students. Results indicate the bi-factorial structure of ROT items, with each of the five items sharing the same rotation pattern. Thus, the item score is influenced by the general construct of mental rotation ability and the item rotation pattern. In addition, ROT items function in the same way across sexes; therefore, they can support the use of ROT for examining sex difference with less concern about test bias. A sex gap favoring males persists in the data.
The second study, The role of spatial ability in students' progression through organic chemistry, examines whether students who scored low on the ROT in general chemistry are less likely to advance through organic chemistry, and the relationship of spatial ability to organic chemistry course grades for students who completed organic chemistry courses. The findings indicate that the ability to perform mental rotations, as measured by the ROT, does not present a barrier for students seeking to advance and succeed in the organic chemistry course sequence in the current setting after other factors, such as math ability, are held constant. For students who were at the low end of ROT, alternate approaches can be used to compensate for the lack of mental rotation ability to solve spatial-related chemistry problems, as suggested by the literature.
The next three studies are about the evaluation and application of the ASCIv2 to measure student attitude toward chemistry. The ASCIv2 is based upon a previous publication, Refinement of a chemistry attitude measure for college students. Study 3, Attitude toward the subject of chemistry in Australia: An ALIUS and POGIL collaboration to promote cross-national comparisons, and Study 4, Gathering psychometric evidence for ASCIv2 to support cross-cultural attitudinal studies for college chemistry programs, gather psychometric evidence for the use of ASCIv2 internationally. The purpose for these two pilot studies is to investigate how ASCIv2 functions at multiple sites where the Process Oriented Guided Inquiry Learning (POGIL) is implemented with one of the objectives being to foster a positive attitude toward the subject in general. One student cohort is from a university in Australia, and the other is from a Saudi Arabian institution. The findings suggest ASCIv2 can be an appropriate tool to measure attitude in an Australian context; however, Saudi Arabian student cohorts responded differently to the item (chemistry is challenging vs. unchallenging), which raises concern about using these items to measure the attitude subscale for students in Saudi Arabia. As compared to Australian and Saudi Arabian students, US students at SE exhibited a negative attitude towards chemistry. Special attention should be paid to ways of getting students more interested in Chemistry.
The last study, College students' attitudes toward chemistry, conceptual knowledge and achievement: structural equation model analysis, examines the contribution of attitude to chemistry performance when math ability and prior chemistry conceptual knowledge are controlled. Results reveal that a full SEM model using three predictors at the beginning of the semester can explain a very high percentage (69%) of the variance in chemistry achievement at the end of course. Both prior conceptual knowledge and attitude toward chemistry contribute a significant unique portion to the prediction of chemistry achievement when controlling for math ability. Therefore, we should not ignore the importance of student conceptual understanding and attitude.
Additional analysis was performed using both ROT and ASCIv2. Results from multiple regression analysis indicate that the unique contribution of the ROT score to the ACS general chemistry exam score is not significant when other variables, such as attitude and math ability, are controlled.
13
Perkins, A., J. V. Becker, and Jill D. Stinson. "Self-Regulation in New Domains: The Reliability and Validity of Scales Measuring Cognitive and Interpersonal Regulation." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etsu-works/7972.
Full text
14
Hagen, Suzanne. "A statistical investigation of the reliability, validity and sensitivity to change of questionnaires measuring aspects of urinary incontinence." Thesis, Glasgow Caledonian University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443239.
Full text
15
Stattin, Sebastian. "Concurrent validity and reliability of a time of-flight camera on measuring muscle’s mechanical properties during sprint running." Thesis, Umeå universitet, Avdelningen för idrottsmedicin, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-163191.
Full textAbstract:
Recent advancements in 3D data gathering have made it possible to measure the distance to an object at different time stamps through the use of time-of-flight cameras. Therefore, the purpose of this study was to investigate the validity and reliability of a time-of-flight camera on different mechanical sprint properties of the muscle. Fifteen male football players performed four 30m maximal sprint bouts which was simultaneously recorded with a time-of-flight camera and 1080 sprint device. By using an exponential function on the collected positional- and velocity-time data from both the devices, following variables were derived and analyzed: Maximal velocity (nmax), time constant (t), theoretical maximal force (F0), theoretical maximal velocity (V0), peak power output (Pmax), F-V mechanical profile (Sfv) and decrease in ratio of force (Drf). The results showed strong correlation in vmax along with a fairly small standard error of estimate (SEE) (r = 0,817, SEE = 0,27 m/s), while t displayed moderate correlation and relatively high SEE (r = 0,620, SEE = 0,12 s). Furthermore, moderate mean bias (>5%) were revealed for most of the variables, except for vmax and V0. The within-sessions reliability using Intraclass correlation coefficient (ICC) and standard error of measurement (SEM) ranged from excellent to poor with Pmax displaying excellent reliability (ICC = 0,91, SEM = 72W), while vmax demonstrated moderate reliability (ICC = 0,61, SEM = 0,26 m/s) and t poor(ICC = 0,44, SEM = 0,11 s). In conclusion, these findings showed that in its current state, the time-of-flight camera is not a reliable or valid device in estimating different mechanical properties of the muscle during sprint running using Samozino et al’s computations. Further development is needed.
16
Morales, Jennifer. "Measuring Teacher Dispositions Toward Teaching Sustainable Systems: A Mixed Methods Approach for Instrument Development and Psychometric Testing." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2188.
Full textAbstract:
Sustainability concerns have become prevalent in environmental, societal, and economic systems. To address education towards sustainability the need for explicit instruction in sustainable systems is apparent; however, it is underrepresented in American schools. Despite the emergence of sustainability topics in the literature, few have addressed teacher dispositions about providing this needed instruction and none have reported quantitative measures with acceptable estimates of reliability and validity.Dispositions are defined as the tendency to act in a particular manner that aligns with an individual’s belief which can develop and change over time, and are influenced by the experiences and circumstances faced by the individual. To provide the necessary instruction not only are instructors responsible for the curricular content and pedagogical content, but most importantly, they must possess positive dispositions towards providing this instruction.
The purpose of this study was to construct and determine estimates of the validity and reliability of the Dispositions Toward Teaching Sustainable Systems Instrument. Using a sequential mixed methods design and Luyt’s Framework for instrument development the researcher, using qualitative methods such as interviews, identified themes that were supportive of the theoretical construct. The four themes that emerged were: administrative support, outdoor resources, collaboration, and professional development, all receiving above 80% interrater agreement (n=3 judges). The quantitative aspect identified the key indicators (items) and their estimates of reliability and validity, and their goodness of fit to the four theoretical constructs.
Content validity estimates of the items generated from the interviews were explored using expert judges (n=2) in the area of sustainability education, also achieving above 80% agreement. Participants enrolled in three succeeding semesters of the Teaching Elementary Science Methods course (n=233) were then used to further estimate the reliability (α >.08), construct validity (normed chi-Square = 2.04; GFI=.86 RMSEA =.076; NFI=.96 CFI =.98 PGFI=.634 binomial index of model fit ppR=.271 R2=.073 (4,227)=4.5 pp
17
Eyckmans, June. "Measuring receptive vocabulary size : reliability and validity of the yes/no vocabulary test for French-speaking learners of Dutch /." Utrecht : LOT, 2004. http://catalogue.bnf.fr/ark:/12148/cb40153601d.
Full text
18
Jackson, Theresa Katherine. "Examining evidence of reliability and validity of mental health indicators on a revised national survey measuring college student health." College Park, Md. : University of Maryland, 2008. http://hdl.handle.net/1903/8259.
Full textAbstract:
Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Public and Community Health. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
19
Smith, Allison B. Smith. "Validation Of A Smartphone Application For Measuring Shoulder Internal Rotation and External Rotation Range Of Motion With Intra-Rater Reliability." Otterbein University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=otbn1461840909.
Full text
20
Losik, Len. "Using Telemetry to Measure Equipment Reliability and Upgrading the Satellite and Launch Vehicle Factory ATP." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595730.
Full textAbstract:
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>Satellite and launch vehicles continues to suffer from catastrophic infant mortality failures. NASA now requires satellite suppliers to provide on-orbit satellite delivery and a free satellite and launch vehicle in the event of a catastrophic infant mortality failure. A high infant mortality failure rate demonstrates that the factory acceptance test program alone is inadequate for producing 100% reliability space vehicle equipment. This inadequacy is caused from personnel only measuring equipment performance during ATP and performance is unrelated to reliability. Prognostic technology uses pro-active diagnostics, active reasoning and proprietary algorithms that illustrate deterministic data for prognosticians to identify piece-parts, components and assemblies that will fail within the first year of use allowing this equipment to be repaired or replaced while still on the ground. Prognostic technology prevents equipment failures and so is pro-active. Adding prognostic technology will identify all unreliable equipment prior to shipment to the launch pad producing 100% reliable equipment and will eliminate launch failures, launch pad delays, on-orbit infant mortalities, surprise in-orbit failures. Moving to the 100% reliable equipment extends on-orbit equipment usable life.
21
Harward, Nathan Arthur. "Measuring Soft Error Sensitivity of FPGA Soft Processor Designs Using Fault Injection." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5699.
Full textAbstract:
Increasingly, soft processors are being considered for use within FPGA-based reliable computing systems. In an environment in which radiation is a concern, such as space, the logic and routing (configuration memory) of soft processors are sensitive to radiation effects, including single event upsets (SEUs). Thus, effective tools are needed to evaluate and estimate how sensitive the configuration memories of soft processors are in high-radiation environments. A high-speed FPGA fault injection system and methodology were created using the Xilinx Radiation Test Consortium's (XRTC's) Virtex-5 radiation test hardware to conduct exhaustive tests of the SEU sensitivity of a design within an FPGA's configuration memory. This tool was used to show that the sensitivity of the configuration memory of a soft processor depends on several variables, including its microarchitecture, its customizations and features, and the software instructions that are executed. The fault injection experiments described in this thesis were performed on five different soft processors, i.e., MicroBlaze, LEON3, Arm Cortex-M0 DesignStart, OpenRISC 1200, and PicoBlaze. Emphasis was placed on characterizing the sensitivity of the MicroBlaze soft processor and the dependence of the sensitivity on various modifications. Seven benchmarks were executed through the various experiments and used to determine the SEU sensitivity of the soft processor's configuration memory to the instructions that were executed. In this thesis, a wide variety of soft processor fault injection results are presented to show the differences in sensitivity between multiple soft processors and the software they run.
22
Běhounek, Tomáš. "Imaging Reflectometry Measuring Thin Films Optical Properties." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-233857.
Full textAbstract:
V této práci je prezentována inovativní metoda zvaná \textit{Zobrazovací Reflektometrie}, která je založena na principu spektroskopické reflektometrie a je určena pro vyhodnocování optických vlastností tenkých vrstev .\ Spektrum odrazivosti je získáno z map intenzit zaznamenaných CCD kamerou. Každý záznam odpovídá předem nastavené vlnové délce a spektrum odrazivosti může být určeno ve zvoleném bodu nebo ve vybrané oblasti.\ Teoretický model odrazivosti se fituje na naměřená data pomocí Levenberg~-~Marquardtova algoritmu, jehož výsledky jsou optické vlastnosti vrstvy, jejich přesnost, a určení spolehlivosti dosažených výsledků pomocí analýzy citlivosti změn počátečních nastavení optimalizačního algoritmu.
23
Jansen, van Vuuren Yolandie. "Work wellness of pentecostal pastors in the North West Province / Yolandie Jansen van Vuuren." Thesis, North-West University, 2005. http://hdl.handle.net/10394/933.
Full textAbstract:
Literature generally acknowledges that ministers have a demanding job with unique requirements
and unclear boundaries between their personal and professional lives. Since 1980, studies have been
describing an alarming spread of burnout in the ministry, with three out of four ministers reporting
severe stress, causing anguish, worry, bewilderment, anger, depression, fear and alienation. South
African literature indicates ministry as a high-risk occupation with regard to burnout. As providers
of help, ministers are exposed to demanding work situations, with unique job and client-related
stressors that show high correlation with burnout.
Burnout, according to Levert (et al, 2000) is a syndrome consisting of three dimensions: these are
Exhaustion, Cynicism and lack of Professional Efficacy. Exhaustion refers to the depletion and
draining of emotional resources and feelings of being overextended. Cynicism reflects a negative,
cynical and callous attitude towards recipients of service, andlor extreme detached responses to
aspects pertaining to the job. A lack of professional efficacy refers to the tendency to evaluate
aspects negatively with regard to personal accomplishments and competence at work. Burnout in the
human service industry is a growing phenomenon.
The objectives of this study were to determine the reliability and validity of the Maslach Burnout
Inventory (MBI) in the context of ministry, The Utrecht Work Engagement Scale (UWES), and the
Coping Orientations to Problems Experienced questionnaire (COPE), and to develop a measuring
instrument to describe occupational stress of Pentecostal pastors in the North West Region of South
Africa. A cross-sectional survey design was used. Availability samples (n = 100) were taken of
qualified and ordained Pentecostal Pastors in the ministry. The Ministry Demands Survey was
developed as measuring instrument, indicating internal demands/emotional input and relationship
demands/demands with regard to calling, as reliable factors. Coping was described as being either
Problem or Emotion-focused.
Health of Pentecostal pastors was predicted by Internal Demands/Emotional Input, Exhaustion and
Problem and Emotion-focused Coping. Recommendations for future research were made.<br>Thesis (M.Com. (Industrial Psychology))--North-West University, Potchefstroom Campus, 2006.
24
Rusch, Thomas, Paul Benjamin Lowry, Patrick Mair, and Horst Treiblmaier. "Breaking Free from the Limitations of Classical Test Theory: Developing and Measuring Information Systems Scales Using Item Response Theory." Elsevier, 2017. http://dx.doi.org/10.1016/j.im.2016.06.005.
Full textAbstract:
Information systems (IS) research frequently uses survey data to measure the interplay between technological systems and human beings. Researchers have developed sophisticated procedures to build and validate multi-item scales that measure latent constructs. The vast majority of IS studies uses classical test theory (CTT), but this approach suffers from three major theoretical shortcomings: (1) it assumes a linear relationship between the latent variable and observed scores, which rarely represents the empirical reality of behavioral constructs; (2) the true score can either not be estimated directly or only by making assumptions that are difficult to be met; and (3) parameters such as reliability, discrimination, location, or factor loadings depend on the sample being used. To address these issues, we present item response theory (IRT) as a collection of viable alternatives for measuring continuous latent variables by means of categorical indicators (i.e., measurement variables). IRT offers several advantages: (1) it assumes nonlinear relationships; (2) it allows more appropriate estimation of the true score; (3) it can estimate item parameters independently of the sample being used; (4) it allows the researcher to select items that are in accordance with a desired model; and (5) it applies and generalizes concepts such as reliability and internal consistency, and thus allows researchers to derive more information about the measurement process. We use a CTT approach as well as Rasch models (a special class of IRT models) to demonstrate how a scale for measuring hedonic aspects of websites is developed under both approaches. The results illustrate how IRT can be successfully applied in IS research and provide better scale results than CTT. We conclude by explaining the most appropriate circumstances for applying IRT, as well as the limitations of IRT.
25
Hradilova, Selin Klara. "Measuring harm from drinking in Sweden : Self-reports from drinkers in the general population." Doctoral thesis, Stockholm : Centre for Social Research on Alcohol and Drugs (SoRAD) : Department of Sociology, Stockholm University : Stockholms universitetsbibliotek [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-995.
Full text
26
Westerlund, Per. "Condition measuring and lifetime modelling of disconnectors, circuit breakers and other electrical power transmission equipment." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214984.
Full textAbstract:
The supply of electricity is important in modern society, so the outages of the electric grid should be few and short, especially for the transmission grid. A summary of the history of the Swedish electrical system is presented. The objective is to be able to plan the maintenance better by following the condition of the equipment. The risk matrix can be used to choose which component to be maintained. The risk matrix is improved by adding a dimension, the uncertainty of the probability. The risk can be reduced along any dimension: better measurements, preventive maintenance or more redundancy. The number of dimensions can be reduced to two by following iso-risk lines calculated for the beta distribution. This thesis lists twenty surveys about circuit breakers and disconnectors, with statistics about the failures and the lifetime. It also presents about forty condition-measuring methods for circuit breakers and disconnectors, mostly applicable to the electric contacts and the mechanical parts. A method for scheduling thermography based on analysis of variance of the current is tried. Its aim is to reduce the uncertainty of thermography and it is able to explain two thirds of the variation using the time of the day, the day of the week and the week number as explanatory variables. However, the main problem remains as the current is in general too low. A system with IR sensors has been installed at the nine contacts of six disconnectors with the purpose of avoiding outages for maintenance if the contacts are in a good condition. The measured temperatures are sent by radio and regressed against the square of the current, the best exponent found. The coefficient of determination $R^2$ is high, greater than 0.9. The higher the regression coefficient is, the more heat is produced at the contact. So this ranks the different contacts. Finally a framework for lifetime modelling and condition measuring is presented. Lifetime modelling consists in associating a distribution of time to failure with each subpopulation. Condition measuring means measuring a parameter and estimating its value in the future. If it exceeds a threshold, maintenance should be carried out. The effect of maintenance of the contacts is shown for four disconnectors. An extension of the risk matrix with uncertainty, a survey of statistics and condition monitoring methods, a system with IR sensors at contacts, a thermography scheduling method and a framework for lifetime modelling and condition measuring are presented. They can improve the planning of outages for maintenance. Finally a framework for lifetime modelling and condition measuring is presented. Lifetime modelling consists in associating a distribution of time to failure with each subpopulation. Condition measuring means measuring a parameter and estimating its value in the future. If it exceeds a threshold, maintenance should be carried out. The effect of maintenance of the contacts is shown for four disconnectors. An extension of the risk matrix with uncertainty, a survey of statistics and condition monitoring methods, a system with IR sensors at contacts, a thermography scheduling method and a framework for lifetime modelling and condition measuring are presented. They can improve the planning of outages for maintenance.<br>Elförsörjningen är viktig i det moderna samhället, så avbrotten bör vara få och korta, särskilt i stamnätet. En kortfattad historik över det svenska elsystemet presenteras. Målet är att kunna planera avbrotten för underhåll bättre genom att veta mera om apparaternas skick. Det är svårt att planera avbrott för underhåll och utbyggnad. Riskmatrisen är verktyg för att välja vad som ska underhållas och den kan förbättras genom att lägga till en dimension, sannolikhetens osäkerhet. Risken kan minskas längs med varje dimension: bättre mätningar, förebyggande underhåll och mer redundans. Antalet dimensioner kan igen bli två genom att följa linjer med samma risk, som är beräknade för betafördelningen. Denna avhandling tar upp tjugo studier av fel i brytare och frånskiljare med data om felorsak och livslängd. Den har också en översikt av ett fyrtiotal olika metoder för tillståndsmätningar för brytare och frånskiljare, som huvudsakligen rör de elektriska kontakterna och de mekaniska delarna. Ett system med IR sensorer har installerats på de nio kontakterna på sex frånskiljare. Målet är att minska antalet avbrott för underhåll genom att skatta skicket när frånskiljarna är i drift. De uppmätta temperaturerna tas emot genom radio och behandlas genom regression mot kvadraten av strömmen, då den bästa exponenten för strömmen visade sig vara 2,0. Förklaringsfaktorn $R^2$ är hög, över 0,9. För varje kontakt ger det en regressionskoefficient. Ju högre koefficienten är, desto mer värme utvecklas det i kontakten, vilket kan leda till skador på materialet. Koefficienterna ger en rangordning av frånskiljarna. Systemet kan också användas för att minska eller öka den tillåtna strömmen baserat på skicket. Slutligen förklaras ett ramverk för livslängdsmodellering och tillståndsmätning. Livslängdsmodellering innebär att koppla en fördelning för tiden till fel med varje delpopulation. Med tillståndsmätning avses att mäta en parameter och skatta dess värde i framtiden. Om den överskrider en tröskel, måste apparaten underhållas. Effekten av underhåll visas för fyra frånskiljare. En utveckling av riskmatrisen med osäkerheten, en sammanställning av statistik och metoder för tillståndsövervakning, ett system med IR-sensor vid kontakerna, en metod för termografiplanering och ett ramverk för livslängdsmodellering och tillståndsmätningar presenteras. De kan förbättra avbrottsplaneringen.<br>El suministro de energía eléctrica es importante en la sociedad moderna. Por eso los cortes eléctricos deben ser poco frecuentes y de poca duración, sobre todo en la red de transmisión. Esta tesis resume la historia del sistema eléctrico sueco. El objetivo es planificar los cortes mejor siguiendo la condición de los aparatos. La matriz de riesgo se utiliza muchas veces para escoger en qué aparatos debería realizarse mantenimiento. Esta matriz se puede mejorar añadiendo una dimensión: la incertidumbre de la probabilidad. El riesgo puede ser disminuido siguiendo cada una de las tres dimensiones: mejores mediciones, mantenimiento preventivo y mayor redundancia. El número de dimensiones puede reducirse siguiendo líneas del mismo riesgo calculadas para la distribución beta. Esta tesis presenta veinte estudios de fallos en interruptores y seccionadores con datos sobre la causa y el tiempo hasta la avería. Contiene también una visión general de cuarenta métodos para medir la condición de seccionadores e interruptores, aplicables en su mayoría a los contactos eléctricos y los componentes mecánicos. Se ha instalado un sistema con sensores infrarrojos en los seis contactos de nueve seccionadores. El objetivo es disminuir los cortes de servicio para mantenimiento, estimando la condición con el seccionador en servicio. Las temperaturas son transmitidas por radio y se hace una regresión con el cuadrado de la corriente, ya que el mejor exponente de la corriente resultó ser 2,0. $R^2$ alcanza un valor de 0,9 indicando un buen ajuste de los datos por parte del modelo. Existe un coeficiente de regresión para cada contacto y este sirve para ordenar los contactos según la necesidad de mantenimiento, ya que cuanto mayor sea el coeficiente más calor se produce en el contacto. Finalmente se explica que el modelado de tiempo hasta la avería consiste en asignar una distribución estadística a cada equipo. La monitorización del estado consiste en medir y estimar un parámetro y luego predecir su valor en el futuro. Si va a sobrepasar un cierto límite, el equipo necesitará de mantenimiento. Se presenta el efecto de mantenimiento de cuatro seccionadores. Un desarrollo de la matriz de riesgo, un conjunto de estadísticas y métodos de monitoreo de condición, un sistema de sensores IR situados cerca de los contactos, en método de planificación de termografía y un concepto para explicar la modelización de tiempo hasta la avería y de la monitorización de la condición han sido presentados y hace posible una mejor planificación de los cortes de servicio.<br><p>QC 20170928</p>
27
Evers, Georges Christoffel Maria. "Appraisal of self-care agency A.S.A.-scale reliability and validity testing of the Dutch version of the A.S.A.-scale measuring Orem's concept 'Self-Care Agency' /." Assen [etc.] : Maastricht : Van Gorcum ; University Library, Maastricht University [Host], 1989. http://arno.unimaas.nl/show.cgi?fid=5473.
Full text
28
Kridli, Suha Al-Oballi. "Establishing reliability and validity of an instrument measuring attitudes, subjective norms, perceived control, and behavioral intentions of Jordanian Muslim women toward the use [of] oral contraceptives." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841313.
Full text
29
Aljaloud, Khalid. "Habitual physical activity assessment using objective measuring devices : observations in lean and obese adults and children." Thesis, University of Stirling, 2010. http://hdl.handle.net/1893/2541.
Full textAbstract:
Physical inactivity is one of the major public health problems in many parts of the World. In Scotland it is reported that two thirds of Scottish adults (>16yrs) and one third of Scottish children (<16yrs) do not do sufficient physical activity to gain the health benefits of physical activity. Furthermore, there is still much debate about the nature and volume of physical activity required to provide health benefits. Therefore, more investigations are required to help improve our understanding of the links between physical activity, obesity and health. In addition, the assessment of habitual physical activity needs to be accurately quantified using appropriate methods that are valid and reliable. The main aims of this thesis were thus to assess the validity and reliability of three new generations of movement sensing devices (Actigraph, ActivPAL and SenseWear PRO2) in adults and adolescents in a controlled laboratory environment and to then use the most valid and reliable device in assessing the habitual physical activity of adults (lean and overweigh/obese) and adolescents in a free-living situation. Following objectively assessing the habitual physical activity, investigation of the associations between physical activity status and cardiovascular and metabolic disease risk markers in adults and adolescents were the last main aims of this thesis. In the first study, the results indicated that the new generations of the three devices were reliable in assessing EE during walking on the flat and on a 5% incline in lean and overweight/obese adults and lean adolescents. However, none iii of these devices and the methods or programme versions that were selected and applied was able to accurately estimate EE during walking on a treadmill. However, based on the sensitivity data obtained and previous evidence, the Actigraph was considered the most appropriate device for assessing the habitual physical activity due to its ability to discriminate between physical activity intensities. The second and third studies concluded that adults (including lean and overweight/obese) met the recommended physical activity guidelines for health and wellbeing purposes. However, the data suggest that overweight/obese participants may need to be advised to spend more time in MVPA and probably more vigorous activity to not only reduce body fat but also to increase cardiorespiratory fitness and reduce their chances of future cardiovascular and metabolic disease. The fourth and fifth studies, demonstrated that the Scottish adolescents –in the cross sectional study- were below the recommended physical activity guidelines. When the method of physical activity assessment was adjusted the Scottish adolescents were similar to the adolescents in other European countries and were observed to be more active than adolescents in some of the developed countries such as American adolescents (Texas State). In the case of lean adolescents who have a low physical activity- but who are not sedentary- the cardiovascular and metabolic disease risk markers may not be obvious at this stage, but the differences in glucose and HOMA-IR suggest that there may be early signs of progression towards metabolic disease in this group. iv The importance of the associations between vigorous physical activity and body fat, as well as between body fat and the risk markers of metabolic disease, suggests that future intervention studies should focus on monitoring the outcome from vigorous physical activity interventions vs. moderate activity within current guidelines.
30
Losik, Len. "Stopping Launch Vehicle Failures Using Telemetry to Measure Equipment Usable Life." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595729.
Full textAbstract:
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>Launch vehicle equipment reliability is driven by infant mortality failures, which can be eliminated using a prognostic analysis prior, during and/or after the exhaustive and comprehensive dynamic environmental factory acceptance testing. Measuring and confirming equipment performance is completed to increase equipment reliability by identifying equipment that fails during test for repair/replacement. To move to the 100% reliability domain, equipment dynamic environmental factory testing should be followed by a prognostic analysis to measure equipment usable life and identify the equipment that will fail prematurely. During equipment testing, only equipment performance is measured and equipment performance is unrelated to equipment reliability making testing alone inadequate to produce equipment with 100% reliability. A prognostic analysis converts performance measurements into an invasive usable life measurement by sharing test data used to measure equipment performance. Performance data is converted to usable life data provides a time-to-failure (TTF) in minutes/hours/days/months for equipment that will fail within the first year of use, allowing the production of equipment with 100% reliability.
31
Celinder, Johan, and Anders Klang. "Processorienterad kultur : Mätmetod över beteenden som driver resultat i en processorienterad kultur." Thesis, Mittuniversitetet, Institutionen för kvalitets- och maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36999.
Full textAbstract:
Iden till arbetet fick författarna från en föreläsning om kultur (SIQ & SKI, 2018) och hur enligt Drucker kulturen i en organisation slår strategi utan problem. Syftet var att undersöka vilka beteenden som driver resultat i en processorienterad kultur, samt att utveckla en modell för att mäta detta. Målet var att mäta beteende i organisationen för att hjälpa dem skapa en konkurrenskraftigare kultur och snabbare uppnå processorientering med en enkät i en kvantitativ pilotstudie. Trots att alla svarade var populationen får pilotstudien för liten för att ge signifikanta resultat. Studien bygger på teorin om kluster av fyra tillämpningar “fumlare”, “kartläggare”, “pratare” och “organiserare” från Hellström & Eriksson (2013) och resultaten redovisas i diagram och IPA-matris. Slutasatsen är att organisationen lutar åt funktionsorientering, men strävar i riktning mot processorientering. Den sammanlagda bilden är att de tillhör klustret “pratare” med knapp marginal. De är dock på väg i riktningen att börja sin resa mot processorientering via fokus på kommunikation. Mätmodellen som används är i linje med forskning och ger svar på vilka hindrande och stödjande beteenden som finns i en organisation för en processorienterad kultur. Mätmodellen har även svagheten att den inte ger svar på andra frågor än för hörnstenen “att arbeta med processer” och att processorientering endast utgör en del av det som är en kvalitetskultur.<br>The authors of this thesis got the idea to this projekt from a lecture and from Drucker´s quote “Culture eats strategy for breakfast”. The purpose was to investigate what behaviours that drives results in a process oriented culture, and to develop a model for measuring these behaviours. The goal was to measure the behaviours in the organisation and to help them obtain a culture that exceed the culture of their competitors, and reaching process orientation using a quantitative survey in a pilot study. Even though we got answers from all participants in the survey, the population was too small to generate statistically significant results. The study is based on the theory of four clusters; “fumblers”, “talkers”, “organisers”, and “mappers” by Eriksson and Hellström (2013) and the results are displayed in diagrams and an IPA-matrix. The conclusion is that the organisation leans towards function orientation, but they are striving towards becoming process orientated. The total picture the authors got is they belong to the cluster “talkers” with a slight margin. They are heading in the direction of becoming process orientated by focusing on their communication though. The model was designed using research about what behaviours have a positive or a negative effect on the processorientated culture of the organisation. The weakness of the model is that it only takes the cornerstone “working with processes” into account and does not measure the other perspectives of quality culture.<br><p>2019-07-26</p>
32
Uher, Daniel. "Analýza procesu testování bezpečnostních prvků s airbagy v automobilech." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230175.
Full text
33
Berger, Laura Elizabeth. "Validation of a 10-item Questionnaire Measuring Fruit and Vegetable Consumption in 9-11 year old Children Living in Low-Income Households." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406209480.
Full text
34
Losik, Len. "Using Telemetry to Measure Equipment Mission Life on the NASA Orion Spacecraft for Increasing Astronaut Safety." International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581640.
Full textAbstract:
ITC/USA 2012 Conference Proceedings / The Forty-Eighth Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2012 / Town and Country Resort & Convention Center, San Diego, California<br>The surprise failure of two NASA Space Shuttles and the premature failures of satellite subsystem equipment on NASA satellites are motivating NASA to adopt an engineering discipline specifically developed for preventing surprise equipment failures. The NASA Orion spacecraft is an Apollo module-like capsule planned to replace the NASA Space Shuttle reusable launch vehicle for getting astronauts to space and return to the earth safely as well as a crew escape vehicle stored at the ISS. To do so, NASA is adopting a non-Markov reliability paradigm for measuring equipment life based on the prognostic and health management program on the Air Force F-35 Joint Strike Fighter. The decision is based on the results from the prognostic analysis completed on the Space Shuttle Challenger and Columbia that identified the information that was present but was ignored for a variety of reasons prior to both accidents. The goal of a PHM is to produce equipment that will not fail prematurely and includes using predictive algorithms to measure equipment usable life. Equipment with transient behavior, missed by engineering analysis is caused from accelerated of parts will fail prematurely with 100% certainty. With the processing speed of today's processors, transient behavior is caused from at least one part suffering from accelerated aging. Transient behavior is illustrated in equipment telemetry in a prognostic analysis but not in an engineering analysis. Telemetry is equipment performance information and equipment performance has been used to increase reliability, but performance is unrelated to equipment remaining usable life and so equipment should be failing prematurely. A PHM requires equipment telemetry for analysis and so analog telemetry will be available from all Orion avionics equipment. Replacing equipment with a measured remaining usable life of less than one year will stop the premature and surprise equipment failures from occurring during future manned and unmanned space missions.
35
Losik, Len. "Using Telemetry to Measure Equipment Mission Life on the NASA Orion Spacecraft for Increasing Astronaut Safety." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595658.
Full textAbstract:
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>The surprise failure of two NASA Space Shuttles and the premature failures of satellite subsystem equipment on NASA satellites are motivating NASA to adopt an engineering discipline that uses telemetry specifically developed for preventing surprise equipment failures. The NASA Orion spacecraft is an Apollo module-like capsule planned to replace the NASA Space Shuttle reusable launch vehicle for getting astronauts to space and return to the earth safely as well as a crew escape vehicle stored at the ISS. To do so, NASA is adopting a non-Markov reliability paradigm for measuring equipment life based on the prognostic and health management program on the Air Force F-35 Joint Strike Fighter. The decision is based on the results from the prognostic analysis completed on the Space Shuttle Challenger and Columbia that identified the information that was present but was ignored for a variety of reasons. The goal of a PHM is to produce equipment that will not fail prematurely. It includes using predictive algorithms to measure equipment usable life. Equipment with transient behavior caused from accelerated of parts will fail prematurely with 100% certainty. For many decades, it was believed that test equipment and software used to in testing and noise from communications equipment were the cause of most transient behavior. With the processing speed of today's processors, transient behavior is caused from at least one part suffering from accelerated aging. Transient behavior is illustrated in equipment telemetry in a prognostic analysis. Telemetry is equipment performance information and equipment performance has been used to increase reliability, but performance is unrelated to equipment remaining usable life and so equipment should be failing prematurely. A PHM requires equipment telemetry for analysis and so analog telemetry will be available from all Orion avionics equipment. Replacing equipment with a measured remaining usable life of less than one year will stop the premature and surprise equipment failures from occurring during future manned and unmanned space missions.
36
Ahl, Gullan. "Reliabilitets- och validitetstestning av ADL-instrument RAINBOW - ett teamdokument." Thesis, Högskolan i Örebro, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-54256.
Full textAbstract:
Ett nytt instrument utvecklades från Katz´ ADL-index, vilket visat sig vara ett allt för grovt instrument, för att kartlägga patientens aktivitetsförmåga och självständighetsutveckling. Bedömningsinstrumentet innehåller patientdata samt kategori-index och kom att kallas RAINBOW på grund av att instrumentet är i fyrfärgstryck. En kontroll av det nykonstruerade team-instrumentet utfördes i syfte att mäta dess tillförlitlighet. Mellanbedömar reliabilitet mellan oberoende bedömare har prövats. Validiteten har analyserats på 4 patienter ur materialet och jämförts med Katz´ ADl-index. Studien, som bestod av parvisa oberoende bedömningar, utfördes av sjuksköterskor, sjukgymnaster och arbetsterapeuter. 40 patienter deltog i studien. Delaktivitetsbedömningarna uppgick till 950 och innehöll 36 avvikelser. Resultaten visade på 96 % samstämmighet i bedömningarna. Den kvalitativa analysen visade, i jämförelse med Katz´ ADL-index, att RAINBOW kategori-index gav utförligare information om patientens självständighetsnivå samt hjälpbehov. I denna studie bedömdes endast strokepatienter, men då begreppen som ingår i instrumentet kan anses allmängiltiga, torde det även kunna användas på andra diagnosgrupper. En gemensam rehabiliteringsterminologi gav teamarbetet en ökad kvalitet gällande bedömning, planering samt utvärdering av den enskilde patientens aktivitetsförmåga.<br><p>Uppsatsarbete omfattande 10 poäng, C-nivå, inom ramen för arbetsterapeutprogrammet 120 p., Högskolan i Örebro, Institutionen för vårdvetenskap och omsorg. Författarens namn i uppsatsen är Gull-Britt Johansson.</p>
37
Luong, Marie. "Conception optimale de l'architecture d'un systeme d'instrumentation sous contraintes de diagnostic, de fiabilité et de disponibilité." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL155N.
Full textAbstract:
L’objectif de ce mémoire concerne, d'une part, l'analyse structurelle et quantitative d'un processus et, d'autre part, la conception optimale d'une architecture d'instrumentation permettant de définir la position, le nombre et la précision des capteurs. Cette conception doit satisfaire à de nombreuses contraintes dont les principales sont la disponibilité de la valeur des variables nécessaires, la détectabilité et l'isolabilité des capteurs défaillants, la précision de l'estimation, le coût, la fiabilité et la disponibilité du systeme d'instrumentation. Pour ce qui est l'analyse structurelle et quantitative, nous avons développé des méthodes permettant de caractériser le processus selon le critère d'observabilité, le degré de redondance des variables, la détectabilité et l'isolabilité des capteurs défaillants, la précision de l'estimation de l'état du processus, la fiabilité et la disponibilité de son systeme d'instrumentation. Quant à la conception optimale d'un systeme d'instrumentation, elle a été résolue en trois étapes: i) définir la position et le nombre de capteurs sous contraintes d'observabilité, de degré de redondance, de détectabilité et d'isolabilité des capteurs défaillants, de non-mesurabilité et d'obligation de mesurer des variables. En utilisant les cycles et la formulation en termes de programmation linéaire en nombres entiers, une solution optimale est proposée soit en minimisant le coût à fiabilité imposée, soit en maximisant la fiabilité à coût imposé, ii) déterminer la précision des capteurs de façon à garantir une précision imposée de l'estimation, en se basant sur un algorithme à itération directe, iii) déterminer le taux de réparation des capteurs pour obtenir une disponibilité donnée pour le systeme d'instrumentation. Ces méthodes ont été testées sur une partie d'une plate-forme pétrolière de la société ELF
38
Nugues, Samuel. "Mesure de l'état de charge d'une batterie par coulométrie corrigée par impédancemétrie." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0144.
Full textAbstract:
Les systemes actuels de mesure de l'etat de charge d'une batterie ne permettent pas de connaitre de maniere fiable l'energie restante dans un accumulateur. Le premier chapitre detaille le fonctionnement electrotechnique des batteries de traction au nickel-cadmium, presente une modelisation electrique de ces dernieres, explicite le principe de mesure par coulometrie et enfin justifie l'interet de la mesure d'impedance. Dans une deuxieme partie, les bancs de mesure necessaires a l'experimentation relative aux mesures d'impedance sont presentes: banc de mesure d'impedance proprement dit, banc de cyclage permettant la decharge des batteries suivant un cycle qui simule le roulage d'un vehicule et sa recharge. Le troisieme chapitre traite de la methodologie de mesure de l'impedance que nous avons pris soin de definir afin de garantir la fiabilite et la reproductibilite des mesures. Dans la derniere partie, nous interpretons les nombreuses mesures realisees des parties reelle et imaginaire de l'impedance afin d'en deduire des conditions de mesure permettant de connaitre l'etat de charge avec precision et avec un minimum d'experimentations. Nous presentons pour finir les differentes associations pouvant etre envisagees entre la coulometrie et l'impedancemetrie pour realiser une jauge d'energie
39
Franzén, Ähdel Carina, and Wilén Frida Bulukin. "Alla vill varandras väl : Hur ledarskap genom medarbetarskap i en kvalitetskultur skaparpatientnöjdhet vid svenska sjukhus." Thesis, Mittuniversitetet, Avdelningen för kvalitets- och maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-38812.
Full textAbstract:
Engagerat ledarskap är grunden till att skapa en god kvalitetskultur och för attlyckas krävs medarbetarskapets delaktighet. Forskare menar att stödet förnärvarande ledare i vården har fram tills idag varit tämligen outvecklat. Syftetmed denna studie var att förstå framgångsfaktorer för hur kvalitetskulturen isvensk sjukvård kan kopplas mot ledarnas möjlighet att främja ett gottmedarbetarskap. Detta utifrån en förklarande sekventiell mixad metod med tvåkvantitativa mätningar som slutligen resulterade i en kvalitativ intervju. Enmätning av kvalitetskulturen vid svenska sjukhus utfördes utifrån ett tidigareframtaget mätinstrument för att mäta kvalitetskultur. Mätinstrumentetpresenterades genom 13 beteendepar som främjar respektive hindrar enkvalitetskultur. Denna mätning visade att det idag råder en generellt godkvalitetskultur vid svenska sjukhus. Genom denna mätning kunde enregressionsanalys utföras som kopplades samman mot sjukhusens resultat iNationell patientenkät. Ett statistiskt signifikant beteende kunde uppmätassom enligt denna mätning skapar nöjdare patienter ju mer medarbetarnaupplever att detta beteende förekommer i deras organisation. Beteendet ärnär vi har ett problem tar vi reda på grundorsaken innan vi beslutar om enlösning. Detta beteende togs med till två framgångsrika sjukhus för att djupareförstå hur dessa arbetar med medarbetarskapet i just detta beteende. Utifrånworkshop med dessa två sjukhus är slutsatsen att ledare behöver ha erfaritden kvalitetskultur och det medarbetarskap de ska bära för att främja ettmedarbetarskap som kopplats samman med kvalitetskulturen. I jakten på attnå framgång är en stark kvalitetskultur eftersträvansvärd men utifrånworkshoparna ser författarna ingen möjlig snabb lösning för att nå dit.Resultatet visar att dagens ledare i vården behöver stöd i form av mentor ellerreflektion kring ledarskap själv eller i grupp för att utvecklas. I konstruktiv andaär det med förbättringskunskap i grunden som allas delaktighet i arbetet medständiga förbättringar bedrivs. Detta kräver allas reflektion, ärlighet, mod,öppenhet och förtroende där allt grundar sig i att alla vill varandras väl!<br>Committed leadership is the foundation for creating a good quality culture andto succeed, the participation of employees is required. Researchers argue thatsupport for the current leaders in healthcare has until now been ratherundeveloped. The purpose of this study was to understand how the qualityculture in Swedish healthcare can be linked to the leaders' ability to promotegood co-workership. This study was based on an explanatory sequentialmixed method with two quantitative measurements that ultimately resulted in aqualitative interview. A measurement of the quality culture at Swedishhospitals was taken based on a previously developed instrument formeasuring quality culture . The measuring instrument comprises 13behavioral pairs that promote or hinder a quality culture. This measure showsthat there is generally a good quality culture at Swedish hospitals at present.Through this measurement, a regression analysis was done which links to thehospital's results in the National Patient Survey. A statistically significantbehavior was observed, and according to this measurement, is likely to createmore satisfied patients as more professions feel that this behavior occurs intheir organization. The behaviour in question can be described as: when wehave a problem, we find out the root cause before we decide on a solution.This behavior was brought into two successful hospitals in order to understandmore deeply how they work with the co-workership in this particular behavior.Based on the workshop with these two hospitals, we conclude that leadersneed to have experienced the quality culture and the co-workership they areassumed to carry in order to promote an employee culture that is linked to thequality culture. In pursuit of success, a strong quality culture is desirable, butbased on the workshops, the authors see no possible quick solution to reachit. The result shows that today's leaders in healthcare need support in the formof a mentor or time for reflection on leadership on their own or in groups inorder to develop. In constructive approach, it is with improvement knowledgethat everyone's involvement in the work of continuous improvement isconducted. This requires reflection, honesty, courage, openness and trustfrom everyone involved and intentions rooted in the wellness and prosperity ofall.<br><p>2019-06-27</p>
40
Pearson, Crystal Anne. "Measuring eating disorder attitudes and behaviors: a reliability generalization study." 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1191.
Full textAbstract:
I used reliability generalization procedures to determine the mean score reliability
of the Eating Disorder Inventory (EDI), the Eating Attitudes Test (EAT), and the
Bulimia Test (BULIT). Reliability generalization is a type of meta-analysis used to
examine the mean score reliability of a measure across studies and to explore study
factors that influence mean score reliability. Score reliability estimates were included in
28.67% of 293 studies using the EDI, 36.28% of 215 studies using the EAT, and 41.46%
of 41 studies utilizing the BULIT. For the EDI, mean Cronbach’s alphas for the
subscales ranged from .52 to .89 and the mean estimate for the total score was .91. For
the EAT-40 and EAT-26, mean estimates of internal consistency were .81 and .86
respectively. Mean estimates of internal consistency for the EAT-26 subscales ranged
from .56 to .80. The mean estimate of internal consistency for the BULIT-R was .93.
Overall, the mean reliability of scores on all three measures and their subscales/factors
was acceptable except for the Asceticism subscale of the EDI and the Oral Control factor
on the EAT-26, which had mean internal consistency estimates of .52 and .56
respectively. For the EDI, the majority of the subscales that measure specific eating disorder attitudes and behaviors, such as Bulimia and Perfectionism displayed higher
score reliability in clinical eating disorder samples than in nonclinical samples. This
difference was not found in the Drive for Thinness and Body Dissatisfaction subscales,
perhaps because these attitudes are common in both eating disorder and nonclinical
samples. Score reliability information for the EAT and BULIT was primarily reported for
nonclinical samples; therefore, it is difficult to characterize the effect of type of sample
on these measures. There was a tendency for mean score reliability for all the measures
to be higher in the adult samples than in adolescent samples and in the female samples
compared to the male samples. This study highlights the importance of assessing and
reporting internal consistency every time a measure is used because reliability is affected
by characteristics of the participants being examined.
41
Grzadzinski, Rebecca L. "Measuring Change in Social Communication Behaviors: Reliability, Validity, and Application." Thesis, 2018. https://doi.org/10.7916/D8WT09ZN.
Full textAbstract:
Purpose: The field of Autism Spectrum Disorder (ASD) intervention research is in need of treatment response measures that are sensitive to change and flexible enough to be used across studies. The Brief Observation of Social Communication Change (BOSCC) was developed to address this need. The purpose of this work is to examine the initial reliability and validity of the BOSCC in two samples of children with ASD.
Method: In a sample of 56 children participating in ongoing early intervention, the primary objectives of Study 1 were to 1) determine items for inclusion in the BOSCC coding scheme, 2) explore the relationships among items using factor analysis, 3) assess inter-rater and test-retest reliability, and 4) explore change over time. Using a sample of school-age, minimally-verbal children, the primary objectives of Study 2 were to extend the results of Study 1 to a new sample to 1) assess BOSCC changes over time, 2) compare changes in BOSCC to clinician determinations of improvement, 3) examine the relationship between change in BOSCC scores with changes in baseline cognitive skills, adaptive functioning, and ASD severity, and 4) compare changes in BOSCC scores in children who did and did not change on other standard measures.
Results: Study 1 revealed that the BOSCC has high to excellent inter-rater and test-retest reliability and shows convergent validity with measures of language and communication skills. The BOSCC Core total demonstrated statistically significant amounts of change over time while the ADOS Calibrated Severity Score over the same period did not. Results of Study 2 confirmed excellent inter-rater reliability but the BOSCC did not change significantly over time. Most children were identified by clinicians as improving in response to treatment. However, only 15% of children changed significantly on the BOSCC over 16 weeks of intervention.
Limitations: Both studies had small samples of predominantly male, Caucasian children. When interpreting the results of these studies, it is important to consider the differences between samples, including the shorter time of treatment and more cognitively and language impaired children in Study 2.
Conclusions: These studies are a first step in the development of a novel outcome measure for social-communication behaviors with applications to clinical trials and longitudinal studies. Future work should continue to explore the benefits and limitations of the BOSCC in larger independent samples.
42
Sinha, Juhi. "Reliability in measuring the range of motion of the aging cervical spine." 2011. http://hdl.handle.net/1993/4437.
Full textAbstract:
The purposes of this study were to: 1) determine absolute intrarater reliability of using the cervical range of motion device (CROM) for measuring cervical movements in older adults, and 2) determine the intrarater reliability and concurrent validity of the Candrive protocol, which uses a universal goniometer to measure rotation. Forty older adults (75.7 + 4.7 years of age) were tested in two sessions, one week apart, by two raters. Intrarater reliability scores were good for the CROM protocol (coefficient of variation (CV) values were 5.5% and 6.2 % for cervical rotation). The Candrive protocol values were higher (CV = 7.9 and 9.4%). Concordance analyses suggested that the Candrive protocol was less than good in terms of its validity, particularly when order effects were taken into consideration. In conclusion, the CROM protocol demonstrated good reliability for either group or individual analyses, whereas the Candrive protocol was less reliable and its validity marginal.
43
Chou, Hsin-Ju, and 周欣汝. "The reliability of cone beam computed tomography in measuring jaw bone density." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/67073826270151195285.
Full textAbstract:
碩士<br>高雄醫學大學<br>牙醫學系碩士班<br>105<br>Objectives: Bone density and quality are crucial for primary stability and prognosis of dental implant. This study was aimed to investigate the discrepancies of gray value recruited from images of three CBCT systems (TCT , Vatech , NewTom), gray value and crestal cortical bone thickness of four jaw bone area(anterior maxilla and mandible, posterior maxilla and mandible), and the consistency of gray value recruited from different times of scan by the same CBCT systems.
Material and methods: Three artificial bones of different density (type I, type II, type III) were scanned by three CBCT systems(TCT , Vatech, NewTom).On the other hand, CBCT images of 40 patients including 24 males, 16 females, 21 maxilla and 21 mandible, received more than two times of CBCT scan were collected. All the CBCT images were analyzed by biomedical image software ImageJ to calculate their gray value, and the cortical bone thickness of crestal jaw bone were also measured.
Results: There were statistically significant discrepancies (p < 0.001) of gray value between the three CBCT systems, the mean gray value of artificial bone scanned by TCT CBCT were 64.88 ± 1.17 for type I , 42.80 ± 1.83 for type II, 19.55 ± 1.06 for type III artificial bone, while those scanned by Vatech CBCT were 20.43 ± 0.62, 9.63 ± 1.20, 8 ± 0.00 and by NewTom were 35.38 ± 0.74 , 24.68 ± 0.51 , 12 ± 0.02 respectively. No statistically significant discrepancies of gray value (p > 0.05) between two times of scan by same CBCT system in four jaw bone area (anterior maxilla, posterior maxilla, anterior mandible, posterior mandible)were found. The mean maxillary gray value of male was 110.61 ± 10.17, and 105.15 ± 11.73 for female. The mean mandibular gray value of male was 112.87 ± 9.78, and was 103.81 ± 8.63 for female. There was no statistically significant discrepancies (p > 0.05) of gray value between male and female. Significant discrepancies (p < 0.001) of gray value were noted among the four jaw bone areas. The gray values of anterior maxilla (136.18 ± 14.58) and anterior mandible (125.10 ± 14.55) were significant higher (p < 0.001) than posterior maxilla (94.39 ± 13.66) and posterior mandible (102.23 ± 11.81); there were no significant discrepancies (p >0.05) between anterior maxilla and anterior mandible and between posterior maxilla and posterior mandible. Crestal cortical bone thickness of posterior maxilla, anterior maxilla, posterior mandible, and anterior mandible were 1.15 ± 0.40, 1.70 ± 0.72, 1.75 ± 0.73, 1.71 ± 0.67 mm respectively, and cortical bone thickness of posterior maxilla were statistically significant lower than the others.
Conclusion: The gray values of the images obtained by the same CBCT system are consistent, and there were significant differences of the gray values in different jaw areas, but the discrepancies of gray values obtain -ed by CBCT of different systems were difficult to compare. Therefore, using gray values of CBCT as absolute jaw bone density reference is not feasible and the inconsistencies among different CBCT systems still need to be concerned. Gray values and cortical bone thickness are least over posterior maxillary area, primary stability and prognosis of implant in this area must be concerned.
44
Bourne, Douglas Allen. "Accuracy and reliability of a new method of measuring three-dimensional scapular kinematics." Thesis, 2003. http://hdl.handle.net/2429/15097.
Full textAbstract:
The shoulder is a very complex and mobile joint which relies on movement of the clavicle,
scapula as well as the humerus. Measuring movement of the scapula is a problem that has
plagued both researchers and clinicians alike. The scapula is a relatively flat bone that moves
with considerable sliding under the skin, which makes it difficult to use skin markers to
monitor its movement. The current gold standards for measuring scapular motion are
invasive, involving the use of metal implants with or without radiation. The goal of this
research was to develop and validate a non-invasive method to measure scapular movement.
This new technique uses a grid of skin markers located over the scapula to monitor its
movement. In addition, a patient-specific correction factor using digitization of bony
landmarks was developed which takes into account skin movement.
The accuracy of this new method was determined using percutaneous bone pins as a gold
standard. Eight university aged healthy subjects were recruited but the data from one subject
had to be discarded due to pin loosening. An optoelectonic marker grid was applied to the
skin overlying the scapula. Two 1.6mm bone pins with optoelectronic marker carriers were
then inserted into the spine of the left scapula by an orthopaedic surgeon. During
glenohumeral abduction, glenohumeral horizontal adduction, hand behind back, and forward
reaching, three bony landmarks on the scapula were digitized at six arm positions to enable
calculation of a subject-specific skin correction factor. The marker positions were recorded
as the subjects performed each movement 10 times dynamically. The scapular movement
from the bone pin method and the skin-based system were then compared.
The root mean square (rms) errors for the digitization of bony landmarks (which the skin
correction factor depends on) were found to range between 3.5°-4.6°. The rms errors for the
new skin-based technique were found to range between 1.4° - 3.0° when corrected with the
subject-specific skin correction factor. Rms differences (reliability) between days ranged
between 3.8° - 7.5°. A preliminary cadaver study showed that the pins have a small effect on
skin movement.
Few studies have validated non-invasive measurement techniques of scapular motion using a
gold standard. The rms errors of the new skin-based technique are equal to or less than
currently available or reported methods. Therefore, it may be well suited to explore the role
of scapular motion in shoulder pathologies.
45
Lin, Yun-Yi, and 林昀毅. "The Reliability Study of the Response Function of Silicon Detector for Measuring Carrier Mobility." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/5z9958.
Full textAbstract:
碩士<br>國立臺北科技大學<br>光電工程系研究所<br>96<br>This thesis research is to develop an analytical approach of objectively estimating the delay time for measuring carrier mobility of organic light-emitting device (OLED) in transient electroluminescence (TEL) based on Levenberg–Marquardt method under the influence of background noise. Our experimental raw data from the Silicon photodetector were fit to a third-order polynomial for obtaining the best-fit response function with the tolerance less than 1×10-8 by using Levenberg–Marquardt method. The minority carrier mobility is then calculated by the delay time determined from the best-fit response function. Our experimental results of a green-emissive OLED with various operational factors reveal that the order of measured mobility ranges from 10-4 to 10-3 after appraising percentage error. It’s more objective and reasonable to descript the mobility of OLED by a distributed range rather than a single number.
46
Chang, Yaw-Ming, and 張耀明. "Analyzing and Measuring the Travel Time Reliability of the Intercity Transportation Service in Taiwan." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/24749084185307891272.
Full textAbstract:
碩士<br>國立交通大學<br>運輸工程與管理系<br>87<br>The travel time reliability is as important as travel time and travel cost in mode choice. Travelers realize it just by experience or mass communication, because the transit operators usually only offer the departure time reliability even nothing before. By the fair-trade lows, consumers'' rights already have been infringed. If we show the travel time reliability completely and clearly, travelers will appreciate the travel time reliability of transit and it is helpful for heir mode choice.
This study divides the travel time reliability into the departure time reliability, the running time reliability and the arrival time reliability. The punctuality of arrival time is determined by those of departure time and running time. By computing the weights with Analytic Hierarchy Process, we know the travelers think the arrival time reliability is the most important, and the departure time reliability is posterior. It indicates the running time reliability is important for the travelers except the departure time reliability.
We usually measured the punctuality of transit with single threshold, however, the thresholds are different for various modes and individuals in fact. This study suggests the cumulative probability of travel time delay should be a good index to represent the reliability of travel time. For the operators, the threshold of travel time delay is reasonably determined by the travelers'' cognizance. Thus we establish the delay threshold by the membership function of travelers'' perception. Finally, in order to present the idea of punctuality, an empirical study was conducted to measure the punctuality of domestic airlines, intercity railway and bus transportation. The study result provides the basic information for transit operators to improve their transportation service, and collects the required data for discussing the refunding policy for travel time delays.
47
Janikowski, Timothy Peter. "Development of a case simulation measuring prediction skill and investigation of its reliability and validity." 1988. http://catalog.hathitrust.org/api/volumes/oclc/18700844.html.
Full textAbstract:
Thesis (Ph. D.)--University of Wisconsin--Madison, 1988.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 106-113).
48
Vaghmaria, Vinesh. "The inter-examiner reliability and validity of the Myofascial Diagnostic Scale as an assessment tool in the diagnosis of myofascial pain syndrome." Thesis, 2005. http://hdl.handle.net/10321/173.
Full textAbstract:
Thesis (M.Tech.:Chiropractic)-Dept. of Chiropractic, Durban Institute of Technology, 2005
x, 80 leaves<br>The aim of this study was to evaluate the Myofascial Diagnostic Scale, for its inter-examiner reliability and to assess its reliability and validity as an assessment tool in the diagnosis and treatment of Myofascial Pain Syndrome.
49
Otley, Anthony Roger. "Validation of the IMPACT questionnaire for measuring health-related quality of life in paediatric inflammatory bowel disease : sensibility, validity and reliability testing in a paediatric cohort." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=81086&T=F.
Full text
50
Yuan, Shao-Ping, and 袁小平. "Examining factors associated withpre-admission to discharge of stroke patients&Assessing the reliability and validity a scale measuring critical thinking disposition for medical care professionals." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41262023660853202596.
Full textAbstract:
博士<br>中山醫學大學<br>醫學研究所<br>102<br>part 1
Background: Stroke is the second leading cause of death and a major cause of adult disability in Taiwan. This research established correlations between pre-admission and discharge data in stroke patients to promote education of the general public, prevention, treatment and high standards of chronic care.
Methods: A total of 790 stroke patients at Chung Shan Medical University Hospital from 2007 to 2009 contained in the Taiwan Stroke Registry were included in this study. The patients were classified into two major categories: ischemic and hemorrhagic. Thirteen variables, including time series variables: (1) Gender (2) Age (3) Education (4) Mode of arrival (5) Time from symptom onset to ED arrival (6) Time from ED arrival to ED physician assessment (7) Time from ED arrival to neurologist assessment (8) Thrombolytic therapy (9) Discharge status from ED (10) Reason for leaving ED (11) Reason for transfer to another facility (12) In-hospital main caregiver (13) Length of stay, were explored.
Results: Our results showed that age, education, hours from symptom onset to the emergency department (ED) arrival, and length of stay in hospital were significantly associated with stroke incidence.
Conclusions: These findings show the present situation and medical quality of medical care for stroke patients in Taiwan. The factors association model may assist in developing a set of improvement plans for the coming year.
part 2
Background: This paper described the validation of a critical thinking disposition assessment (CTDA) to assess medical care professionals’ or students’ level of critical thinking disposition and to assess the psychometric properties of this instrument.
Methods: To undertake and determine the reliability and validity of the CTDA. Assessments of psychometric equivalencies and similarities in reliability and validity across the CTDA and CTDS were conducted. Using Pearson product-moment correlations to determine the concurrent validity between the scores of the CTDA and CTDS. Statistics were calculated using the SPSS (version 14.0), set at a significance level of 0.05.
Conclusions: In light of these findings, CTDA was found to be a valid and reliable instrument to measure critical thinking disposition for medical care professionals and students.