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University of Guelph
1.
Bourgon, Malo Paul.
Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors.
Degree: Master of Applied Science, School of Engineering, 2012, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3268
► A practical and non-invasive method of calculating the efficiency of electric motors could help reduce anthropogenic green house gas emissions by up to 6%. Such…
(more)
▼ A practical and non-invasive method of calculating the efficiency of electric motors could help reduce anthropogenic green house gas emissions by up to 6%. Such a method has been developed using
quantitative thermography, however currently, the time required for its implementation is prohibitive. In this thesis, registration and segmentation techniques are applied to the thermograms of the above method, particularly thermograms used in the lumped capacitance method (LCM) and those used to find the average temperature of motors, reducing the time required to process thermograms. The processing of LCM thermograms was completely automated (±5% difference when compared to results obtained manually) while processing of motor thermograms required the location of the motor be provided manually the first time a motor is examined, but was completely automated for subsequent thermo- grams of the same motor (±0.9°C and ±0.6°C difference for non-occluded and occluded motors respectively compared to manual results).
Advisors/Committee Members: Stiver, Warren H. (advisor), Dony, Robert D. (advisor).
Subjects/Keywords: Thermography; Quantitative Thermography; Electric Motors; Motor Efficiency; Image Processing; Infrared; IR
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APA (6th Edition):
Bourgon, M. P. (2012). Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3268
Chicago Manual of Style (16th Edition):
Bourgon, Malo Paul. “Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors.” 2012. Masters Thesis, University of Guelph. Accessed January 22, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3268.
MLA Handbook (7th Edition):
Bourgon, Malo Paul. “Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors.” 2012. Web. 22 Jan 2021.
Vancouver:
Bourgon MP. Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors. [Internet] [Masters thesis]. University of Guelph; 2012. [cited 2021 Jan 22].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3268.
Council of Science Editors:
Bourgon MP. Image Processing Techniques to Automate Quantitative Thermography Diagnostics for the Efficient Use of Electric Motors. [Masters Thesis]. University of Guelph; 2012. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3268
2.
O'Grady, Malgorzata.
Building envelope thermal bridging heat loss assessment using infrared thermography
.
Degree: 2018, National University of Ireland – Galway
URL: http://hdl.handle.net/10379/7426
► Reduction of greenhouse gas emissions and energy use is necessary to stop the progress of climate warming, which may have a serious impact on the…
(more)
▼ Reduction of greenhouse gas emissions and energy use is necessary to stop the progress of climate warming, which may have a serious impact on the human environment and the ecosystem. To achieve this reduction, it is essential that energy usage in buildings is limited, as they have been identified as the world's largest energy consumer. In the European Union, buildings-related energy accounts for 40 % of total consumption and the thermal quality of the existing European building stock is below acceptable standards. Thermal upgrading of the building stock gives significant potential for overall energy reduction and is a key concern in current European Union policy. Putting this policy into practice involves, among others, implementation of thermal assessments of existing buildings. Performing such an assessment before and after building retrofitting allows determination of the actual energy reduction achieved, and monitoring of the overall thermal quality of the building stock.
In general, the retrofitting process starts with the building envelope as this is one of the major factors determining the energy demand of a building. To assess the thermal quality of the building envelope, the heat losses, via its plain components such as walls and via thermal bridging appearing on the connection of these components, must be quantified. In this project, a non-destructive method for thermal evaluation of thermal bridging located in existing building envelopes, using
quantitative infrared
thermography technique (ITT), has been developed. This is a significant contribution to state of the art. With this method, the heat loss is expressed by thermal bridging heat flow rate qTB and linear thermal transmittance Ψ-value. The approach employs the surface energy balance principle on a building component surface containing a thermal bridge. Consistent with this principle, the amount of energy transferred to the surface is equal to the amount of energy leaving the surface. The energy leaving the surface is evaluated from surface temperatures recorded during a thermographic survey using an infrared camera. This approach eliminates the necessity for knowledge of the internal structure and materials of the building, which is often unavailable for older buildings.
As part of the development and validation of the methodology, an experimental program was designed in consultation with an industrial partner to ensure that realistic test cases of thermal bridging in buildings were considered. The methodology for the use of the indoor and the outdoor ITT was validated in a hot box device where environmental conditions were strictly monitored. Furthermore, in order to verify the suitability of the methodology to thermal assessment of existing buildings, in-situ testing was carried out. The methodology included the establishment of procedures for undertaking the thermographic survey to enhance the accuracy of the data gathered. The analysis of the data from the thermographic survey was implemented in a Microsoft Excel-based tool for…
Advisors/Committee Members: Harte, Annette (advisor).
Subjects/Keywords: Building envelope;
Thermal bridging;
Hot box;
Quantitative thermography;
Infrared thermography;
Forced convection;
Civil engineering;
Engineering and Informatics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
O'Grady, M. (2018). Building envelope thermal bridging heat loss assessment using infrared thermography
. (Thesis). National University of Ireland – Galway. Retrieved from http://hdl.handle.net/10379/7426
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
O'Grady, Malgorzata. “Building envelope thermal bridging heat loss assessment using infrared thermography
.” 2018. Thesis, National University of Ireland – Galway. Accessed January 22, 2021.
http://hdl.handle.net/10379/7426.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
O'Grady, Malgorzata. “Building envelope thermal bridging heat loss assessment using infrared thermography
.” 2018. Web. 22 Jan 2021.
Vancouver:
O'Grady M. Building envelope thermal bridging heat loss assessment using infrared thermography
. [Internet] [Thesis]. National University of Ireland – Galway; 2018. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10379/7426.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
O'Grady M. Building envelope thermal bridging heat loss assessment using infrared thermography
. [Thesis]. National University of Ireland – Galway; 2018. Available from: http://hdl.handle.net/10379/7426
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University
3.
Codd, Casey L.
Nonlinear Structural Equation Models: Estimation and
Applications.
Degree: MA, Psychology, 2011, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1301409131
► Structural equation modeling is a popular statistical method in the social and behavioral sciences, but it has largely been restricted to modeling linear relationships among…
(more)
▼ Structural
equation modeling is a popular statistical
method in the social and behavioral sciences, but it has largely
been restricted to modeling linear relationships among latent
variables. This can be attributed to the fact that traditional
estimation methods for SEM are based on linear relationships among
the manifest and latent variables, and are not appropriate for
nonlinear models. This thesis will illustrate how marginal maximum
likelihood can be used to estimate a general nonlinear structural
equation model, and how this method can be implemented in SAS Proc
NLMIXED. Attention will also be given to the issue of model
selection in nonlinear structural
equation modeling. An example
using psychological data will be presented to illustrate the
utility of this method.
Advisors/Committee Members: Cudeck, Robert (Advisor).
Subjects/Keywords: Quantitative Psychology; nonlinear structural equation modeling; SEM
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Codd, C. L. (2011). Nonlinear Structural Equation Models: Estimation and
Applications. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1301409131
Chicago Manual of Style (16th Edition):
Codd, Casey L. “Nonlinear Structural Equation Models: Estimation and
Applications.” 2011. Masters Thesis, The Ohio State University. Accessed January 22, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1301409131.
MLA Handbook (7th Edition):
Codd, Casey L. “Nonlinear Structural Equation Models: Estimation and
Applications.” 2011. Web. 22 Jan 2021.
Vancouver:
Codd CL. Nonlinear Structural Equation Models: Estimation and
Applications. [Internet] [Masters thesis]. The Ohio State University; 2011. [cited 2021 Jan 22].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1301409131.
Council of Science Editors:
Codd CL. Nonlinear Structural Equation Models: Estimation and
Applications. [Masters Thesis]. The Ohio State University; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1301409131

Brno University of Technology
4.
Zembol, Filip.
Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/18522
► The topic of my thesis is the analysis of parameters of the infrared imaging and the use of radiation laws for the formation of a…
(more)
▼ The topic of my thesis is the analysis of parameters of the infrared imaging and the use of radiation laws for the formation of a thermographic
equation, which will include the impact of surrounding factors on the resulting temperature relief of the scanned object. These factors include the temperature of the surrounding atmosphere, temperature of the surrounding radiation sources, emissivity coefficients, reflection and transmission. On the basis of this
equation a programme will be created in the MATLAB environment where the resulting temperature relief of the simulated object and the impact of the particular parameters from the
equation will be graphically depicted. In the thesis we will first of all introduce the infrared radiation, its types and features. With the help of the particular radiation laws and distracting elements of the infrared radiation a formula including the distracting elements appearing during scanning of the thermal surface relief will be formed. This formula will enable us to count the surface temperature of the scanned scene and to determine the final temperature without the impact of the unwanted parameters. Furthermore, a programme which will image thermograms on the basis of the
thermography equation will be designed. The thermogram will change in dependance on the changes of the parameters in the
thermography equation. The change will be expressed by the change of temperatures in the scanned scene and by the shift in the colour spectrum (thermographic scale). This programme will graphically present the changes of the quantities influencing the resulting temperature division in the scene and will provide a better grasp of the influence and the function of particular quantities in the thermographic
equation.
Advisors/Committee Members: Čech, Petr (advisor), Drastich, Aleš (referee).
Subjects/Keywords: Infračervené záření; koeficient emisivity; koeficient reflexe; koeficient transmise; MATLAB; teplota; spektrální intenzita záření; Stefan-Boltzmannův vyzařovací zákon; Planckův vyzařovací zákon; šedé těleso; absolutně černé těleso; termografická stupnice; termogram; rovnice kvantitativní termografie.; Infrared radiation; emissivity coefficient; reflection coefficient; transmission coefficient; MATLAB; temperature; spectral radiation intensity; Stefan-Boltzmann Radiation Law; Planck Radiation Law; grey body; absolute black body; thermographic scale; thermogram; quantitative thermography equation.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zembol, F. (2019). Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/18522
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zembol, Filip. “Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters.” 2019. Thesis, Brno University of Technology. Accessed January 22, 2021.
http://hdl.handle.net/11012/18522.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zembol, Filip. “Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters.” 2019. Web. 22 Jan 2021.
Vancouver:
Zembol F. Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/11012/18522.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zembol F. Analýza parametrů infračerveného zobrazení: Analysis of infrared acquisition parameters. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/18522
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Kansas
5.
Garnier-Villarreal, Mauricio.
Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model.
Degree: PhD, Psychology, 2016, University of Kansas
URL: http://hdl.handle.net/1808/22394
► Longitudinal analysis are powerful methods to estimate change over time. The combination of nomothetic and idiographic approaches within longitudinal analysis would allow to answer questions…
(more)
▼ Longitudinal analysis are powerful methods to estimate change over time. The combination of nomothetic and idiographic approaches within longitudinal analysis would allow to answer questions related to intra and interindividual variability in one integrated method. In order to have lag independent results, longitudinal analysis should be made with a continuous-time method. Continuous-time methods take into account that the phenomena of interest does not stop existing between measurement time points. Differential equations modeling is a method that studies intraindividual variability as a form of continuous-time modeling, which can be implemented as fixed-effects or mixed-effects. Mixed-effects models allows to integrate interindividual variability, and properly estimate non-dependent data. Latent Differential
Equation (LDE) model is a method to estimate differential
equation models from a familiar framework in psychology (Structural
Equation Modeling). This dissertation tend to extend the LDE by adding the mixed-effects, estimating
subject and sample parameters, including interindividual variability on parameters of interest. The analyses were implemented from the Bayesian framework, this framework provides several advantages, one of them being that allow us to make direct inference of the estimated parameters. The proposed model (Bayesian Mixed-Effects Nonstationary Latent Differential
Equation Model, BMNLDE) was tested in a simulation, and exemplify with a real data describing the sedentary behavior in older adults. The simulation shows that the BMNLDE model estimate parameters with low bias, the 95% Credible Interval coverage is unreliable when the model presents low frequency and high damping. The frequency of the oscillating processes was the main factor that affected bias and CI coverage. The BMNLDE model showed to be an appropriate method to include intra and interindividual variability. The simulation was capable to demonstrate the conditions in which the model performs as desire, and under which conditions the model does not perform as desire. The real data example shows an application of the BMNLDE model, were the BMNLDE model describes the oscillating behavior of the sedentary behavior. It also shows how it can used to compare parameters of interest between groups.
Advisors/Committee Members: Johnson, David K (advisor), Wu, Wei (cmtemember), Watts, Amber (cmtemember), Skorupski, William P (cmtemember), Deboeck, Pascal R (cmtemember).
Subjects/Keywords: Quantitative psychology; Bayesian; Latent Differential Equation; Mixed-effects
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Garnier-Villarreal, M. (2016). Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/22394
Chicago Manual of Style (16th Edition):
Garnier-Villarreal, Mauricio. “Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model.” 2016. Doctoral Dissertation, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/22394.
MLA Handbook (7th Edition):
Garnier-Villarreal, Mauricio. “Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model.” 2016. Web. 22 Jan 2021.
Vancouver:
Garnier-Villarreal M. Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model. [Internet] [Doctoral dissertation]. University of Kansas; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/22394.
Council of Science Editors:
Garnier-Villarreal M. Intra and Interindividual Variation Modeling: Bayesian Mixed-Effects Nonstationary Latent Differential Equation Model. [Doctoral Dissertation]. University of Kansas; 2016. Available from: http://hdl.handle.net/1808/22394

Michigan State University
6.
Li, Cheng-Hsien.
The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables.
Degree: 2014, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:3268
► Thesis Ph. D. Michigan State University. Measurement and Quantitative Methods 2014.
"The purpose of this thesis was to carry out a Monte Carlo simulation study,…
(more)
▼ Thesis Ph. D. Michigan State University. Measurement and Quantitative Methods 2014.
"The purpose of this thesis was to carry out a Monte Carlo simulation study, in order to compare the performance of ML, the most widely known estimation method, with the three robust estimators (MLR, ULSMV, and WLSMV) on parameter estimates, standard errors, and chi-square goodness of fit statistics in a five-factor structural regression model with ordinal observed variables... " – Abstract.
Description based on online resource; title from PDF t.p. (Sept. 18, 2014)
Advisors/Committee Members: Raykov, Tenko, DeShon, Richard, Diemer, Matthew, Reckase, Mark.
Subjects/Keywords: Monte Carlo method; Structural equation modeling; Quantitative psychology and psychometrics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, C. (2014). The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:3268
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Cheng-Hsien. “The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables.” 2014. Thesis, Michigan State University. Accessed January 22, 2021.
http://etd.lib.msu.edu/islandora/object/etd:3268.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Cheng-Hsien. “The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables.” 2014. Web. 22 Jan 2021.
Vancouver:
Li C. The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables. [Internet] [Thesis]. Michigan State University; 2014. [cited 2021 Jan 22].
Available from: http://etd.lib.msu.edu/islandora/object/etd:3268.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li C. The performance of MLR, USLMV, and WLSMV estimation in structural regression models with ordinal variables. [Thesis]. Michigan State University; 2014. Available from: http://etd.lib.msu.edu/islandora/object/etd:3268
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
7.
Seghir, Rian.
Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals.
Degree: Docteur es, Mécanique, 2012, Ecole centrale de Lille
URL: http://www.theses.fr/2012ECLI0004
► Les critères de localisation et d’endommagement sont généralement basés sur un cadre dissipatif et ce travail s’intéresse aux couplages thermomécaniques accompagnant les micromécanismes de déformation.…
(more)
▼ Les critères de localisation et d’endommagement sont généralement basés sur un cadre dissipatif et ce travail s’intéresse aux couplages thermomécaniques accompagnant les micromécanismes de déformation. Il repose en partie sur des données expérimentales obtenues précédemment dans le laboratoire par Bodelot pour un polycristal d’acier A316L. Ce travail tire profit d'une combinaison de techniques différentes, en particulier de mesures in situ de champs cinématiques et thermiques ainsi que de l’Orientation Imaging Microscopy, de la profilométrie et d’une micrographie de surface. Différents outils ont été développés afin (1) d'identifier automatiquement les systèmes de glissement activés, (2) d’estimer l’émissivité de la surface permettant ainsi une détermination des champs thermiques avec une précision de 30 mK, (3) de projeter les champs bruts expérimentaux sur la microstructure et (4) de permettre la modélisation du polycristal et de ses conditions aux limites thermomécaniques réelles dans un cadre de plasticité cristalline dans le code EF Abaqus. Il a notamment été montré que les variations de température fournissent une estimation précise et aisée de la limite d'élasticité macroscopique ainsi que la détermination de la contrainte de cisaillement critique à l'échelle granulaire. En outre, les mesures cinématiques ont permis l'identification des systèmes de glissement activés. Des bilans énergétiques expérimentaux et numériques ont été réalisés et une grande influence de l'hétérogénéité polycristalline sur les mécanismes de stockage d’énergie a été soulignée. Les méthodes proposées contribueront à améliorer les critères d’endommagement basés sur un cadre dissipatif
Strain localization and damage criteria of materials and structures are commonly based on a dissipative framework and this work investigates the thermomechanical couplings accompanying the deformation micromechanisms. It is partly based on experimental data obtained previously in the laboratory by Bodelot for a A316L austenitic stainless steel polycrystal. This work takes profit of a multi-technique approach combining, in particular, in-situ kinematic and thermal fields measurements as well as Orientation Imaging Microscopy, profilometry and surface micrography. Different tools have been developed (1) to automatically identify the activated slip systems directly from the surface micrography, (2) to approach the surface emissivity field allowing an accurate determination of the thermal fields with a 30 mK precision, (3) to project raw experimental fields on the microstructure and (4) to allow the modeling of the polycrystal aggregate and its real thermomechanical boundary conditions by using a crystal plasticity framework within the Abaqus FE code. It has notably been shown that the temperature variations provides an easy and accurate estimation of the macroscopic yield stress at the specimen scale as well as the determination of the Critical Resolved Shear Stress at the intragranular scale. In addition, the local kinematic measurements allow the in-situ…
Advisors/Committee Members: Charkaluk, Éric (thesis director), Dufrénoy, Philippe (thesis director).
Subjects/Keywords: Energie stockée; Couplages thermomécaniques; Plasticité cristalline; Thermographie infrarouge quantitative; Corrélation d'image numérique; Stored energy; Thermomechanical couplings; Crystalline plasticity; Quantitative infrared thermography; Digital image correlation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Seghir, R. (2012). Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals. (Doctoral Dissertation). Ecole centrale de Lille. Retrieved from http://www.theses.fr/2012ECLI0004
Chicago Manual of Style (16th Edition):
Seghir, Rian. “Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals.” 2012. Doctoral Dissertation, Ecole centrale de Lille. Accessed January 22, 2021.
http://www.theses.fr/2012ECLI0004.
MLA Handbook (7th Edition):
Seghir, Rian. “Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals.” 2012. Web. 22 Jan 2021.
Vancouver:
Seghir R. Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals. [Internet] [Doctoral dissertation]. Ecole centrale de Lille; 2012. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2012ECLI0004.
Council of Science Editors:
Seghir R. Étude expérimentale et numérique des couplages thermomécaniques, et bilan d'énergie au sein des polycristaux métalliques : Experimental and numerical investigation of thermomechanical couplings and energy balance in metallic polycrystals. [Doctoral Dissertation]. Ecole centrale de Lille; 2012. Available from: http://www.theses.fr/2012ECLI0004
8.
Corvec, Guillaume.
Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging.
Degree: Docteur es, Mécanique, 2016, Rennes 1
URL: http://www.theses.fr/2016REN1S049
► La thermographie infrarouge est un moyen d'analyse du comportement mécanique des matériaux. Elle a connu un essor considérable depuis les années 80 avec l'apparition des…
(more)
▼ La thermographie infrarouge est un moyen d'analyse du comportement mécanique des matériaux. Elle a connu un essor considérable depuis les années 80 avec l'apparition des premiers capteurs. Deux techniques principales ont pu être développées ; la calorimétrie quantitative et l'analyse des contraintes par thermoélasticité (TSA en anglais). Jusqu'à aujourd'hui, la majorité des travaux a été réalisée sur les métaux et les polymères. Le présent manuscrit relève le challenge d'appliquer ces techniques aux matériaux verres, en développant une méthodologie de débruitage des films thermiques, permettant de conserver la résolution spatiale des mesures thermiques. Cela permet de caractériser de forts gradients dans des champs de variations de température de faible intensité. Cette méthodologie a été utilisée pour débruiter des films thermiques d'échantillons de verre soumis à un chargement mécanique cyclique. Dans un premier temps, elle a été appliquée pour étudier la réponse thermique d'une empreinte à l'échelle microscopique. Dans un second temps, elle a été utilisée pour remonter à des champs de contraintes et de sources de chaleur à l'échelle macroscopique. Ce travail ouvre de nouvelles perspectives à l'étude du comportement thermomécanique des matériaux fragiles présentant une faible réponse thermique sous sollicitation mécanique et de forts effets de gradients spatiaux. Les applications visées sont la fissuration et l'identification de paramètres constitutifs.
The infrared thermography is used to analyse the mechanical behavior of materials. Since the 80's, it has rised with the appearance of the first sensors. Two principal techniques has been developed; the quantitative calorimetry and the thermoelastic stress analysis (TSA). Until today, most of the works has been carried out on metals and polymers. This manuscript takes-up the challenge of applying these techniques to glassy materials by developing a methodology to denoise infrared movies, which allows to preserve the spatial resolution of the thermal measurement. It allows to caracterise high gradients of low temperature variation fields. This methodology has been used to denoised thermal movies of glass samples submitted to a cyclic mechanical test. In a first time, it has been applied to study the thermal response of an imprint at the microscopic scale. In a second time, stress and heat sources fields have been determined at the macroscopic scale. This work provides new possibilities to study the thermomechanical behavior of brittle materials which present a low thermal response and high spatial gradients under mechanical loading. The target applications are the cracking phenomenom and the identification of constitutive parameters.
Advisors/Committee Members: Le Cam, Jean-Benoît (thesis director), Sangleboeuf, Jean-Christophe (thesis director).
Subjects/Keywords: Thermographie infrarouge; Verres inorganiques; Filtrage temporel; Filtrage spatio-Temporel; Analyse thermoélastique des contraintes; Calorimétrie quantitative; Comportement thermomécanique; Infrared thermography; Inorganic glass; Thermomechanical analysis; Thermoelastic stress analysis (TSA); Quantitative calorimetry
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APA (6th Edition):
Corvec, G. (2016). Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging. (Doctoral Dissertation). Rennes 1. Retrieved from http://www.theses.fr/2016REN1S049
Chicago Manual of Style (16th Edition):
Corvec, Guillaume. “Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging.” 2016. Doctoral Dissertation, Rennes 1. Accessed January 22, 2021.
http://www.theses.fr/2016REN1S049.
MLA Handbook (7th Edition):
Corvec, Guillaume. “Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging.” 2016. Web. 22 Jan 2021.
Vancouver:
Corvec G. Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging. [Internet] [Doctoral dissertation]. Rennes 1; 2016. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2016REN1S049.
Council of Science Editors:
Corvec G. Analyse thermomécanique du comportement des verres inorganiques par imagerie infrarouge quantitative : Thermomechanical analysis of the inorganic glass behavior by quantitative infrared imaging. [Doctoral Dissertation]. Rennes 1; 2016. Available from: http://www.theses.fr/2016REN1S049

Michigan State University
9.
Hoke, Paul Bryan.
Experimental measurement of the slit response function and corrected infrared thermographic measurements.
Degree: MS, Department of Mechanical Engineering, 1998, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:27747
Subjects/Keywords: Thermography
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APA (6th Edition):
Hoke, P. B. (1998). Experimental measurement of the slit response function and corrected infrared thermographic measurements. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:27747
Chicago Manual of Style (16th Edition):
Hoke, Paul Bryan. “Experimental measurement of the slit response function and corrected infrared thermographic measurements.” 1998. Masters Thesis, Michigan State University. Accessed January 22, 2021.
http://etd.lib.msu.edu/islandora/object/etd:27747.
MLA Handbook (7th Edition):
Hoke, Paul Bryan. “Experimental measurement of the slit response function and corrected infrared thermographic measurements.” 1998. Web. 22 Jan 2021.
Vancouver:
Hoke PB. Experimental measurement of the slit response function and corrected infrared thermographic measurements. [Internet] [Masters thesis]. Michigan State University; 1998. [cited 2021 Jan 22].
Available from: http://etd.lib.msu.edu/islandora/object/etd:27747.
Council of Science Editors:
Hoke PB. Experimental measurement of the slit response function and corrected infrared thermographic measurements. [Masters Thesis]. Michigan State University; 1998. Available from: http://etd.lib.msu.edu/islandora/object/etd:27747

University of Kansas
10.
Boulton, Aaron Jacob.
Fit Index Sensitivity in Multilevel Structural Equation Modeling.
Degree: MA, Psychology, 2011, University of Kansas
URL: http://hdl.handle.net/1808/8047
► Multilevel Structural Equation Modeling (MSEM) is used to estimate latent variable models in the presence of multilevel data. A key feature of MSEM is its…
(more)
▼ Multilevel Structural
Equation Modeling (MSEM) is used to estimate latent variable models in the presence of multilevel data. A key feature of MSEM is its ability to quantify the extent to which a hypothesized model fits the observed data. Several test statistics and so-called fit indices can be calculated in MSEM as is done in single-level structural
equation modeling. Accordingly, problems associated with these measures in the single-level case may apply to the multilevel case and new complications may arise. Few studies, however, have examined the performance of fit indices in MSEM. Furthermore, recent findings suggest that evaluating fit at each level separately is advantageous to evaluating fit for the overall model. Therefore, the purpose of the present study was to evaluate the sensitivity of several fit indices to misspecification in the cluster-level model under varying multilevel data conditions including the intraclass correlation coefficient, sample size configuration, and severity of model misspecification. Furthermore, three methods of level-specific fit evaluation were compared. Results from a Monte Carlo simulation study suggest that fit indices are affected by the ICC of model indicators and sample size configurations in MSEM. With the exception of the SRMR, all fit indices were less sensitive to cluster-level model misspecification at low indicator ICCs, large overall sample sizes, and smaller numbers of clusters. Discrepancies in fit information between two methods of level-specific fit were observed at low ICC values. Finally, two fit indices rarely used in SEM applications revealed desirable properties in certain simulation conditions. Implications of the simulation results are discussed and a program for implementing level-specific fit evaluation in the R statistical language is provided.
Advisors/Committee Members: Preacher, Kristopher J. (advisor), Little, Todd D. (cmtemember), Wu, Wei (cmtemember), Johnson, Paul (cmtemember).
Subjects/Keywords: Quantitative psychology; Psychometrics; Fit indices; Fit sensitivity; Model fit; MSEM; Multilevel structural equation modeling
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Boulton, A. J. (2011). Fit Index Sensitivity in Multilevel Structural Equation Modeling. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/8047
Chicago Manual of Style (16th Edition):
Boulton, Aaron Jacob. “Fit Index Sensitivity in Multilevel Structural Equation Modeling.” 2011. Masters Thesis, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/8047.
MLA Handbook (7th Edition):
Boulton, Aaron Jacob. “Fit Index Sensitivity in Multilevel Structural Equation Modeling.” 2011. Web. 22 Jan 2021.
Vancouver:
Boulton AJ. Fit Index Sensitivity in Multilevel Structural Equation Modeling. [Internet] [Masters thesis]. University of Kansas; 2011. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/8047.
Council of Science Editors:
Boulton AJ. Fit Index Sensitivity in Multilevel Structural Equation Modeling. [Masters Thesis]. University of Kansas; 2011. Available from: http://hdl.handle.net/1808/8047
11.
Gerstner, Jerusha J.
Addressing serial-order and negative-keying effects: A mixed-methods study.
Degree: 2015, James Madison University
URL: https://commons.lib.jmu.edu/diss201019/16
► Researchers have studied item serial-order effects on attitudinal instruments by considering how item-total correlations differ based on the item’s placement within a scale (e.g., Hamilton…
(more)
▼ Researchers have studied item serial-order effects on attitudinal instruments by considering how item-total correlations differ based on the item’s placement within a scale (e.g., Hamilton & Shuminsky, 1990). In addition, other researchers have focused on item negative-keying effects on attitudinal instruments (e.g., Marsh, 1996). Researchers consistently have found that negatively-keyed items relate to one another above and beyond their relationship to the construct intended to be measured. However, only one study (i.e., Bandalos & Coleman, 2012) investigated the combined effects of serial-order and negative-keying on attitudinal instruments. Their brief study found some improvements in fit when attitudinal items were presented in a unique, random order to each participant, which is easily implemented using computer survey software.
In this study I replicated and extended these findings by considering three attitudinal scales: Conformity Scale (Goldberg et al., 2006; Jackson, 1994) and two subscales of the Big Five – Conscientiousness and Agreeableness (John & Srivastava, 1999). In addition, I collected and analyzed qualitative data in the form of think-alouds and used these data to inform the
quantitative results in an explanatory sequential mixed-methods design (Creswell, 2011). I administered three different groupings of the items on these three instruments to random groups of university students. The items were displayed in either a blocked (i.e., all positively-keyed items followed by all negatively-keyed items), alternating (i.e., items alternated keying every other item beginning with a positively-keyed item), or random (i.e., items presented in a different random order for each participant) order.
When each participant saw a different randomly-ordered version of the attitudinal scale, I found fewer expected measurement error correlations among items of the same keying and in close proximity (i.e., serial order) to one another. Moreover, in this random ordering, the modification indices associated with the suggested measurement error correlations were lower than in the other orderings. Finally, the fit of the model to the data was the best in the random ordering for all except the Agreeableness scale. Practitioners are urged to administer attitudinal scales in a computer-generated random order unique to each participant whenever possible.
Advisors/Committee Members: Deborah Bandalos.
Subjects/Keywords: structural equation modeling; confirmatory factor analysis; method factors; measurement; noncognitive assessment; ordering effects; Quantitative Psychology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gerstner, J. J. (2015). Addressing serial-order and negative-keying effects: A mixed-methods study. (Doctoral Dissertation). James Madison University. Retrieved from https://commons.lib.jmu.edu/diss201019/16
Chicago Manual of Style (16th Edition):
Gerstner, Jerusha J. “Addressing serial-order and negative-keying effects: A mixed-methods study.” 2015. Doctoral Dissertation, James Madison University. Accessed January 22, 2021.
https://commons.lib.jmu.edu/diss201019/16.
MLA Handbook (7th Edition):
Gerstner, Jerusha J. “Addressing serial-order and negative-keying effects: A mixed-methods study.” 2015. Web. 22 Jan 2021.
Vancouver:
Gerstner JJ. Addressing serial-order and negative-keying effects: A mixed-methods study. [Internet] [Doctoral dissertation]. James Madison University; 2015. [cited 2021 Jan 22].
Available from: https://commons.lib.jmu.edu/diss201019/16.
Council of Science Editors:
Gerstner JJ. Addressing serial-order and negative-keying effects: A mixed-methods study. [Doctoral Dissertation]. James Madison University; 2015. Available from: https://commons.lib.jmu.edu/diss201019/16
12.
Myers, Aaron J.
Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model.
Degree: 2017, James Madison University
URL: https://commons.lib.jmu.edu/master201019/511
► Expectancy-value theory applied to examinee motivation suggests examinees’ perceived value of a test indirectly affects test performance via examinee effort. This empirically supported indirect effect,…
(more)
▼ Expectancy-value theory applied to examinee motivation suggests examinees’ perceived value of a test indirectly affects test performance via examinee effort. This empirically supported indirect effect, however, is often modeled using importance and effort scores measured after test completion, which does not align with their theoretically specified temporal order. Retrospectively measured importance and effort scores may be influenced by examinees’ test performance, impacting the estimate of the indirect effect. To investigate the effect of timing of measurement, first-year college students were randomly assigned to one of three conditions where (1) importance and effort were measured retrospectively; (2) importance was measured prospectively; and (3) importance and effort were measured prospectively. Additionally, importance and effort were measured retrospectively in conditions two and three to determine if the rank-order and average importance and effort scores change from before to after the test. The indirect effect was invariant across conditions, indicating no effect of behavioral commitment on retrospective importance and effort scores. Although the unstandardized indirect effect using prospective and retrospective importance and effort scores was invariant across conditions, the standardized indirect effect was smaller in the prospective condition. Thus, testing practitioners should be cautious when interpreting and making decisions based on the standardized indirect effect. Average latent retrospective effort scores were lower than prospective effort scores via cross-sectional analyses. Moreover, examinees completing both importance and effort measures reported lower retrospective effort than prospective effort. This decrease in effort was not related to test performance, indicating change in effort is not influenced by test performance. However, given examinees tend to decrease ratings of effort after experiencing the test, results from techniques such as motivation filtering will differ depending on when motivation is measured. Importantly, examinees primed by engaging in prospective ratings of motivation had higher average levels of test performance than examinees that did not provide prospective ratings. Although the increase in test performance was small, priming may provide a cheap intervention aimed at increasing test performance.
Advisors/Committee Members: Sara J. Finney, John D. Hathcoat, Kenneth E. Barron.
Subjects/Keywords: mediation; structural equation modeling; measurement; motivation; Educational Assessment, Evaluation, and Research; Quantitative Psychology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Myers, A. J. (2017). Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model. (Masters Thesis). James Madison University. Retrieved from https://commons.lib.jmu.edu/master201019/511
Chicago Manual of Style (16th Edition):
Myers, Aaron J. “Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model.” 2017. Masters Thesis, James Madison University. Accessed January 22, 2021.
https://commons.lib.jmu.edu/master201019/511.
MLA Handbook (7th Edition):
Myers, Aaron J. “Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model.” 2017. Web. 22 Jan 2021.
Vancouver:
Myers AJ. Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model. [Internet] [Masters thesis]. James Madison University; 2017. [cited 2021 Jan 22].
Available from: https://commons.lib.jmu.edu/master201019/511.
Council of Science Editors:
Myers AJ. Retrospective versus prospective measurement of examinee motivation in low-stakes testing contexts: A moderated mediation model. [Masters Thesis]. James Madison University; 2017. Available from: https://commons.lib.jmu.edu/master201019/511

University of Kansas
13.
Fall, Emily C.
Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies.
Degree: PhD, Psychology, 2011, University of Kansas
URL: http://hdl.handle.net/1808/9787
► The heterogeneity implicit in much of social science research can be accommodated by using complex modeling procedures such as SEM or MLM. Ignoring heterogeneity, particularly…
(more)
▼ The heterogeneity implicit in much of social science research can be accommodated by using complex modeling procedures such as SEM or MLM. Ignoring heterogeneity, particularly with regard to nested data structures, can have serious consequences for model estimation and lead to incorrect conclusions about tested hypotheses. In mediation models, the consequences of ignoring nesting can have a substantial impact on the indirect effect. Inflated standard errors and bias in the parameter estimates lead to inaccurate estimates of the indirect effect, as well as reduced power to detect the effect. Using multilevel structural
equation modeling (MSEM), data were generated based on a cross-lagged panel model for mediation. By fitting a single-level model to the data, the consequences for the estimation and detection of the indirect effect when heterogeneity is ignored is examined through measures of relative bias, power, and model fit.
Advisors/Committee Members: Preacher, Kristopher J. (advisor), Little, Todd D. (cmtemember), Deboeck, Pascal R. (cmtemember), Wu, Wei (cmtemember), Johnson, Paul (cmtemember).
Subjects/Keywords: Quantitative psychology; Psychometrics; Cross-lagged panel model; Longitudinal modeling; Mediation; Multilevel structural equation modeling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fall, E. C. (2011). Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/9787
Chicago Manual of Style (16th Edition):
Fall, Emily C. “Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies.” 2011. Doctoral Dissertation, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/9787.
MLA Handbook (7th Edition):
Fall, Emily C. “Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies.” 2011. Web. 22 Jan 2021.
Vancouver:
Fall EC. Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies. [Internet] [Doctoral dissertation]. University of Kansas; 2011. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/9787.
Council of Science Editors:
Fall EC. Modeling Heterogeneity in Indirect Effects: Multilevel Structural Equation Modeling Strategies. [Doctoral Dissertation]. University of Kansas; 2011. Available from: http://hdl.handle.net/1808/9787

University of Kansas
14.
Grandfield, Elizabeth M.
Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis.
Degree: PhD, Psychology, 2019, University of Kansas
URL: http://hdl.handle.net/1808/30203
► Researchers are typically interested in comparing groups of people and/or comparing people across time. If researchers are to conclude differences are due to group dynamics…
(more)
▼ Researchers are typically interested in comparing groups of people and/or comparing people across time. If researchers are to conclude differences are due to group dynamics or time, we must establish that the measure(s) we are using are actually invariant across groups or time. Some statistical methods (ANOVA and regression) make this assumption without direct evaluation. Conducting analyses in the Structural
Equation Modeling (SEM) framework using Confirmatory Factor Analysis (CFA) is one way the assumption of measurement invariance can be evaluated directly. Many researchers have studied multiple group invariance and current invariance testing recommendations are based on multiple group studies and simulations. There is a lack of literature on testing invariance in longitudinal designs. Current guidelines recommend researchers apply the same guidelines from multiple group to longitudinal designs. Longitudinal designs are more complicated and may need different recommendations. The current study evaluates measurement invariance in longitudinal CFA in order to ascertain if the current guidelines based off the multiple group case are acceptable when applied to the longitudinal framework.
Advisors/Committee Members: Brandt, Holger (advisor), Cramer, Emily (advisor), Watts, Amber (cmtemember), Vitevitch, Michael S. (cmtemember), Thompson, James R. (cmtemember).
Subjects/Keywords: Quantitative psychology; Confirmatory Factor Analysis; Longitudinal; Measurement Invariance; Reasonableness Tests; Structural Equation Modeling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Grandfield, E. M. (2019). Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/30203
Chicago Manual of Style (16th Edition):
Grandfield, Elizabeth M. “Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis.” 2019. Doctoral Dissertation, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/30203.
MLA Handbook (7th Edition):
Grandfield, Elizabeth M. “Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis.” 2019. Web. 22 Jan 2021.
Vancouver:
Grandfield EM. Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis. [Internet] [Doctoral dissertation]. University of Kansas; 2019. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/30203.
Council of Science Editors:
Grandfield EM. Evaluating Reasonableness Tests for Longitudinal Measurement Invariance in Structural Equation Modeling using Confirmatory Factor Analysis. [Doctoral Dissertation]. University of Kansas; 2019. Available from: http://hdl.handle.net/1808/30203
15.
Samaca Martinez, José Ricardo.
Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements.
Degree: Docteur es, Génie Mécanique, 2013, Université Blaise-Pascale, Clermont-Ferrand II
URL: http://www.theses.fr/2013CLF22419
► De nombreux phénomènes à l’oeuvre dans le processus de déformation et d’endommagement des élastomères sont étudiés à partir de la réponse mécanique de ces matériaux.…
(more)
▼ De nombreux phénomènes à l’oeuvre dans le processus de déformation et d’endommagement des élastomères sont étudiés à partir de la réponse mécanique de ces matériaux. Cependant, la plupart de ces phénomènes dépendent de la température et ont des signatures calorimétriques qui pourraient permettre de mieux les comprendre. Dans le contexte industriel de la manufacture de pneumatiques, les élévations de température induites par le chargement peuvent fortement impacter les performances physiques des pneumatiques ainsi que la tenue en fatigue des constituants caoutchoutiques. L’objectif de cette thèse est donc de caractériser le comportement thermomécanique des élastomères chargés et non chargés sous divers types de chargement mécanique. Pour ce faire, des mesures de champs thermiques et cinématiques couplées ont été mises en oeuvre lors d’essais mécaniques à température ambiante. Dans un premier temps, des essais de traction uniaxiale sur éprouvettes indemnes ont permis de confirmer que l’hystérésis mécanique observée lors d’un cycle de traction sur un caoutchouc naturel non chargé est essentiellement due au phénomène de cristallisation et non à des phénomènes dissipatifs. Par ailleurs, la construction de bilans énergétiques sur un cycle mécanique a permis de distinguer la contribution des différents mécanismes dissipatifs (viscosité, effet Mullins) des couplages thermomécaniques (élasticité entropique, cristallisation). Dans un second temps, des essais de cisaillement pur ont été menés sur des éprouvettes préalablement entaillées. Les analyses thermomécaniques menées à l’échelle de la zone d’influence de la fissure ont montré que les phénomènes dissipatifs aux très grandes déformations ne s’expriment pas de la même manière qu’aux déformations plus faibles. En particulier, pour les mélanges considérés dans cette étude, les effets du couplage entropique et de la viscosité sont du même ordre à la décharge, si bien que le matériau n’absorbe pas de chaleur à la décharge. Ces résultats sont très prometteurs à la fois pour la compréhension des phénomènes physiques impliqués dans le processus de déformation et pour la modélisation du comportement thermomécanique des élastomères.
Usually, most of the physical phenomena involved in the deformation of elastomers are studied from purely mechanical approaches. However, almost all of such phenomena depend on temperature and have distinguishable calorimetric signatures, which can enable us to better understand them. Furthermore, in the tire industrial context, the temperature increase induced by loading and self-heating may strongly impact the physical performances of tires as well as the fatigue life of the rubber components. Consequently, the aim of this PHD thesis was to characterize the thermomechanical behavior of rubbers, filled and unfilled, subjected to different mechanical loadings. For this purpose, coupled thermal and kinetic full field measurements have been performed during mechanical tests at ambient temperature. First, homogeneous uniaxial tensile tests have enabled…
Advisors/Committee Members: Le Cam, Jean-Benoît (thesis director).
Subjects/Keywords: Elastomères; Thermographie infrarouge; Corrélation d’images; Cristallisation; Effet Mullins; Dissipation mécanique; Couplages thermomécaniques; Fissuration; Calorimétrie quantitative; Elastomers; Infrared thermography; Digital Image Correlation; Crystallization; Mullins effect; Mechanical dissipation; Thermomechanical couplings; Crack tip; Quantitative calorimetry
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Samaca Martinez, J. R. (2013). Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements. (Doctoral Dissertation). Université Blaise-Pascale, Clermont-Ferrand II. Retrieved from http://www.theses.fr/2013CLF22419
Chicago Manual of Style (16th Edition):
Samaca Martinez, José Ricardo. “Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements.” 2013. Doctoral Dissertation, Université Blaise-Pascale, Clermont-Ferrand II. Accessed January 22, 2021.
http://www.theses.fr/2013CLF22419.
MLA Handbook (7th Edition):
Samaca Martinez, José Ricardo. “Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements.” 2013. Web. 22 Jan 2021.
Vancouver:
Samaca Martinez JR. Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements. [Internet] [Doctoral dissertation]. Université Blaise-Pascale, Clermont-Ferrand II; 2013. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2013CLF22419.
Council of Science Editors:
Samaca Martinez JR. Analyse thermomécanique du comportement cyclique des élastomères par mesure de champs : Thermomechanical analysis of the cyclic behavior of elastomers using full field measurements. [Doctoral Dissertation]. Université Blaise-Pascale, Clermont-Ferrand II; 2013. Available from: http://www.theses.fr/2013CLF22419

UCLA
16.
Trickey, Kirsten Alexandra.
Structural Models of Coefficient of Variation Matrices.
Degree: Psychology, 2015, UCLA
URL: http://www.escholarship.org/uc/item/0zj3b6qk
► The coefficient of variation (CV) measures variability relative to the mean, and can be useful when increases in the mean correspond with systematic increases in…
(more)
▼ The coefficient of variation (CV) measures variability relative to the mean, and can be useful when increases in the mean correspond with systematic increases in variability. The univariate CV has been studied and applied extensively, but until recently it was not possible to study the structure of relative covariation occurring in multivariate data. However, Boik and Shirvani (2009) demonstrated that relative covariation could be modeled using estimators they developed to describe the sampling distribution of the CV matrix. This matrix, denoted Ψ, is defined as Ψ=D_μ^(-1) Σ D_μ^(-1),where D_μ is diagonal matrix containing variable means and Σ is the covariance matrix. The present research builds on this previous work by considering a more general class of structure models of the CV matrix. Specifically, we investigated how structural equation models of the CV matrix could be estimated and applied. First, a statistical theory for the estimation and evaluation of structural equation models of CV matrices was developed for both normally and arbitrarily distributed variables using generalized least squares. Computational algorithms were then written to implement the theory and to allow CV models to be estimated. Using these algorithms, a series of simulation studies were conducted to determine the quality of the estimators proposed by Boik and Shirvani (2009) and the quality of the subsequent model parameters, standard errors, and test statistics, which rely on those estimators. The simulations considered a range of sample sizes, normal and log-normal data, different numbers of variables, and models with either one or two factors. It was found that Boik and Shirvani's theoretical estimators of the variance of the sampling distribution of the Ψ converged very slowly to their expected values and that they were particularly unreliable for log-normal data. That said, the estimation methods relying on these estimators, were generally able to estimate factor loadings accurately across conditions and when the sample sizes were fairly large and the number of variables was small, they also produced reasonably accurate estimates of the variance parameters, standard errors and test-statistics. However, in small samples with large numbers of variables, the variance estimates and the model fit statistics tended to be too low and the standard errors were typically overly conservative. In addition, when the data were log-normal the model fit statistics were problematic regardless of whether the estimator relied on normal theory. This general pattern of results was observed in both one-factor and two-factor models. The discussions below address some possible explanations for the estimation problems noted here and propose future work that should be done to better understand and potentially correct these problems. Some of this work was initiated here and included in a short series of follow-up studies. Specifically, we addressed the numerical stability of the CV matrix and its sampling…
Subjects/Keywords: Quantitative psychology and psychometrics; Statistics; Coefficient of Variation; Generalized Least Squares; Structural Equation Models; Structural Models
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APA ·
Chicago ·
MLA ·
Vancouver ·
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APA (6th Edition):
Trickey, K. A. (2015). Structural Models of Coefficient of Variation Matrices. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/0zj3b6qk
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Trickey, Kirsten Alexandra. “Structural Models of Coefficient of Variation Matrices.” 2015. Thesis, UCLA. Accessed January 22, 2021.
http://www.escholarship.org/uc/item/0zj3b6qk.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Trickey, Kirsten Alexandra. “Structural Models of Coefficient of Variation Matrices.” 2015. Web. 22 Jan 2021.
Vancouver:
Trickey KA. Structural Models of Coefficient of Variation Matrices. [Internet] [Thesis]. UCLA; 2015. [cited 2021 Jan 22].
Available from: http://www.escholarship.org/uc/item/0zj3b6qk.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Trickey KA. Structural Models of Coefficient of Variation Matrices. [Thesis]. UCLA; 2015. Available from: http://www.escholarship.org/uc/item/0zj3b6qk
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Merced
17.
Felt, John Michael.
Methods to Evaluate How Stress Affects Mental Abstraction.
Degree: Psychological Sciences, 2018, University of California – Merced
URL: http://www.escholarship.org/uc/item/2q45z0qt
► Mental abstraction is a process of information reduction. Higher levels of mental abstraction are associated with a broadened-perspective, whereas lower levels of mental abstraction are…
(more)
▼ Mental abstraction is a process of information reduction. Higher levels of mental abstraction are associated with a broadened-perspective, whereas lower levels of mental abstraction are associated with a narrowed-perspective. Recent work has linked mood to levels of mental abstraction, providing a potential link to stress (which is characterized as a negative mood state). However, there have not been any studies investigating a potential link between stress and mental abstraction. Therefore, the aim of this dissertation was to explore the potential link between stress and mental abstraction. Three research questions were addressed in this dissertation: 1) Does stress affect average levels of mental abstraction? 2) Can the relationship between stress and mental abstraction be explained by negative mood? and 3) Can the relationship between stress and mental abstraction be explained by cardiovascular reactivity to stress? To address these research questions, an experimental design was developed. Participants were randomly assigned to either a stress or no-stress condition. Exposure to the laboratory stressor led to higher levels of mental abstraction, suggesting that stress may lead to a preference for more abstract stimuli. Each chapter of this dissertation is a standalone study detailing different components of this dissertation. Therefore, some of the descriptions about the methodology may seem to repeat. Chapter 2 explains the development of the control procedure. Chapter 3 focuses on the primary purpose of the dissertation, which is to examine the relationship between stress and mental abstraction. Chapter 4 then recommends future methodological directions for evaluating the stress response and how it relates to outcomes variables.
Subjects/Keywords: Physiological psychology; Experimental psychology; Quantitative psychology; Cardiovascular reactivity; Information Processing; Mental Abstraction; Stress; Structural Equation Modeling; Trier Social Stress Test
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Felt, J. M. (2018). Methods to Evaluate How Stress Affects Mental Abstraction. (Thesis). University of California – Merced. Retrieved from http://www.escholarship.org/uc/item/2q45z0qt
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Felt, John Michael. “Methods to Evaluate How Stress Affects Mental Abstraction.” 2018. Thesis, University of California – Merced. Accessed January 22, 2021.
http://www.escholarship.org/uc/item/2q45z0qt.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Felt, John Michael. “Methods to Evaluate How Stress Affects Mental Abstraction.” 2018. Web. 22 Jan 2021.
Vancouver:
Felt JM. Methods to Evaluate How Stress Affects Mental Abstraction. [Internet] [Thesis]. University of California – Merced; 2018. [cited 2021 Jan 22].
Available from: http://www.escholarship.org/uc/item/2q45z0qt.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Felt JM. Methods to Evaluate How Stress Affects Mental Abstraction. [Thesis]. University of California – Merced; 2018. Available from: http://www.escholarship.org/uc/item/2q45z0qt
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Helsinki
18.
Seesjärvi, Erik.
Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus.
Degree: Institute of Behavioural Sciences; Helsingfors universitet, Beteendevetenskapliga fakulteten, Institutionen för beteendevetenskaper, 2014, University of Helsinki
URL: http://hdl.handle.net/10138/136402
► The aim of the study was to estimate the proportional effects of genetic and environmental factors on individual differences in music perception. Previous research has…
(more)
▼ The aim of the study was to estimate the proportional effects of genetic and environmental factors on individual differences in music perception. Previous research has demonstrated that genetic effects explain a substantial amount of these differences, and that common environmental effects have been low or have not been examined because of methodological constraints. However, in defining the accuracy of music perceptual skills, most previous studies have used somewhat simple auditory stimuli this choice limiting their generalizability. In order to reliably determine the proportional effects of genetic and environmental factors on perception of more complex musical stimuli, the present study utilized unfamiliar melodies, the classical twin design, and structural equation modelling.
The participants of the current study were 384 twins from the longitudinal FinnTwin16 study, aged 32–38 years. They performed an online music perception test that consists of two subtests with pitch-related tasks (Scale and Out-of-key subtests) and one subtest with a time-related task (Off-beat subtest). The test includes 30 unfamiliar melodies. The participants also answered a short questionnaire regarding their educational background and self-assessed musical ability.
The results showed that genetic factors explained about half of the interindividual variance in ability to detect pitch changes in repeated melodies (Scale subtest), whereas common environmental factors had only marginal effect on this ability. Furthermore, genetic factors explained about a quarter or less of the interindividual variance in ability to detect a timing delay that was disrupting the meter or rhythm of melody (Off-beat subtest). There were no common environmental effects. In contrast, a different pattern of results was obtained for ability to detect a tone that violated the established scale expectations (Out-of-key subtest) in which there were only marginal genetic effects whereas common environmental factors explained over half of the interindividual variance. Together with the previous research, these results show that genetic factors explain a significant portion of the individual differences in music perception tasks especially when the task is sufficiently demanding cognitively. However, when the task demands explicit or implicit knowledge of musical scales, genetic effects disappear and the individual differences can mostly be explained by common environmental factors.
Subjects/Keywords: Music perception; Twin study; Quantitative genetics; Structural equation modelling; Musiikin havaitseminen; rakenneyhtälömallinnus; Psychology; Psykologia; Psykologi; kvantitatiivinen genetiikka; kaksostutkimus
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Seesjärvi, E. (2014). Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus. (Masters Thesis). University of Helsinki. Retrieved from http://hdl.handle.net/10138/136402
Chicago Manual of Style (16th Edition):
Seesjärvi, Erik. “Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus.” 2014. Masters Thesis, University of Helsinki. Accessed January 22, 2021.
http://hdl.handle.net/10138/136402.
MLA Handbook (7th Edition):
Seesjärvi, Erik. “Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus.” 2014. Web. 22 Jan 2021.
Vancouver:
Seesjärvi E. Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus. [Internet] [Masters thesis]. University of Helsinki; 2014. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10138/136402.
Council of Science Editors:
Seesjärvi E. Nature, nurture, and music : A population-based twin study of music perception: Geenit, ympäristö ja musiikki : Väestöpohjainen musiikin havaitsemisen kaksostutkimus. [Masters Thesis]. University of Helsinki; 2014. Available from: http://hdl.handle.net/10138/136402

University of Bristol
19.
Griffith, Gareth.
How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.
Degree: PhD, 2019, University of Bristol
URL: http://hdl.handle.net/1983/3e2245e1-9fd9-407b-9bf0-de8e6865fb08
► Mental Health is an issue of increasingly accepted importance in the UK, both in policy and in the public sphere. It becomes clear under scrutiny,…
(more)
▼ Mental Health is an issue of increasingly accepted importance in the UK, both in policy and in the public sphere. It becomes clear under scrutiny, however, that any attempt to characterise and prioritise "at risk" groups risks making conclusions entirely sensitive to the definition of mental health chosen by the researcher. This thesis examines the definition and distribution of the mental health conditions which have been the backdrop for this increase in awareness. This involves combining innovative quantitative methodologies in order to develop a comprehensive understanding of UK mental health from 2009-2016. The thesis is divided into two halves. The first half addresses the definition of mental health. Mental health measurement can be crudely categorised into theories which characterise mental health via absence of negative elements and presence of positive elements. Unpacking what is truly captured by the most widely used population screening metrics for each is undertaken using Exploratory Structural Equation Modelling (ESEM). Solutions for both metrics are presented and demonstrated to be both substantively and empirically superior to traditional summed interpretation. The second half of the thesis incorporates these newly suggested interpretations into an investigation of the distribution of mental health across the UK using advanced multilevel modelling techniques. Firstly, a demonstration of what could be known given the summed interpretation of the metrics is given. This demonstrates the differences between the geographical and demographic determinants of the metrics. Finally, the constructs developed from the ESEM analysis become responses in a longitudinal investigation of chronicity in mental health. This presents the first comprehensive overview of UK mental health incorporating both ESEM and Multilevel Modelling. It represents clear evidence of the synergy of the two methodologies. Moreover, the empirical findings of the thesis are relevant and important for central and local governments in developing geographically-sensitive mental health policy.
Subjects/Keywords: 550; Mental Health; Geography; Measurement; Psychology; Wellbeing; Multilevel Modelling; Structural Equation Modelling; Advanced Quantitative Methods; Epidemiology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Griffith, G. (2019). How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. (Doctoral Dissertation). University of Bristol. Retrieved from http://hdl.handle.net/1983/3e2245e1-9fd9-407b-9bf0-de8e6865fb08
Chicago Manual of Style (16th Edition):
Griffith, Gareth. “How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.” 2019. Doctoral Dissertation, University of Bristol. Accessed January 22, 2021.
http://hdl.handle.net/1983/3e2245e1-9fd9-407b-9bf0-de8e6865fb08.
MLA Handbook (7th Edition):
Griffith, Gareth. “How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.” 2019. Web. 22 Jan 2021.
Vancouver:
Griffith G. How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. [Internet] [Doctoral dissertation]. University of Bristol; 2019. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1983/3e2245e1-9fd9-407b-9bf0-de8e6865fb08.
Council of Science Editors:
Griffith G. How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. [Doctoral Dissertation]. University of Bristol; 2019. Available from: http://hdl.handle.net/1983/3e2245e1-9fd9-407b-9bf0-de8e6865fb08

University of Washington
20.
Rinnan, Darwin Scott.
Modeling population dynamics and species interactions in a changing climate.
Degree: PhD, 2018, University of Washington
URL: http://hdl.handle.net/1773/42536
► Many species are expected to undergo significant distributional shifts in response to changes in climate. This adaptive response can impact population dynamics in many ways,…
(more)
▼ Many species are expected to undergo significant distributional shifts in response to changes in climate. This adaptive response can impact population dynamics in many ways, including decreasing reproductive fitness, limiting dispersal, shrinking habitat, and exposing organisms to new competition from invasive species. What determines the successful persistence of a population exposed to climate change? In this dissertation I address different aspects of this fundamental question in three chapters. In the first chapter, I focus on the challenges of modeling asymmetric dispersal. I use a spatially explicit integro-difference
equation (IDE) to model a population whose habitat is shifting due to climate change, and demonstrate its equivalence to a stationary IDE model with asymmetric dispersal behavior. The cumulative effects of population dispersal in space and time have been described with some success by Van Kirk and Lewis's average dispersal success approximation (Van Kirk and Lewis, 1997), but this approximation has been demonstrated to perform poorly when applied to asymmetric dispersal. I provide a comparison of different characterizations of dispersal success and demonstrate how to accurately approximate the effects of asymmetric dispersal with a method known as geometric symmetrization. I apply these different methods to a variety of IDE population models with asymmetric dispersal, and I examine the methods' effectiveness in approximating key ecological traits of the models, such as the critical patch size and the critical speed of climate change for population persistence. I show that the method using geometric symmetrization performs considerably better than other approximations for a variety of models and across a wide range of parameter values. In the second chapter, I examine a coupled system of IDEs that models two species competing for the same resources in a shifting habitat. I determine under what conditions the two populations can coexist and the criteria for persistence in a changing climate. I demonstrate how the speed of climate change can shift the stable-state solution of the population model from mutual coexistence to a single species outcompeting the other and how these effects can be mitigated by niche differentiation, with the potential for habitat considered inhospitable to one species to provide refuge for the other. I illustrate this model with a simulated population of native bull trout (<i>Salvelinus confluentus</i>) experiencing competition from invasive brook trout (<i>S. fontinalis</i>) as their river habitat warms due to climate change. Based on current climate projections, this simulation suggests that bull trout are likely to disappear from the study area by 2080, with brook trout expanding their range in the absence of competition. In the third chapter, I describe a new type of model that combines climate-envelope modeling with IDEs to utilize the strengths of both correlative and process-based modeling. I apply this framework to a case study of the American pika (<i>Ochotona…
Advisors/Committee Members: Lawler, Joshua J (advisor).
Subjects/Keywords: climate change; competition; dispersal; integro-difference equation; species distribution model; species interaction; Ecology; Statistics; Applied mathematics; Quantitative ecology and resource management
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rinnan, D. S. (2018). Modeling population dynamics and species interactions in a changing climate. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/42536
Chicago Manual of Style (16th Edition):
Rinnan, Darwin Scott. “Modeling population dynamics and species interactions in a changing climate.” 2018. Doctoral Dissertation, University of Washington. Accessed January 22, 2021.
http://hdl.handle.net/1773/42536.
MLA Handbook (7th Edition):
Rinnan, Darwin Scott. “Modeling population dynamics and species interactions in a changing climate.” 2018. Web. 22 Jan 2021.
Vancouver:
Rinnan DS. Modeling population dynamics and species interactions in a changing climate. [Internet] [Doctoral dissertation]. University of Washington; 2018. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1773/42536.
Council of Science Editors:
Rinnan DS. Modeling population dynamics and species interactions in a changing climate. [Doctoral Dissertation]. University of Washington; 2018. Available from: http://hdl.handle.net/1773/42536

University of Washington
21.
Phillips, Austin Joseph.
Spatial Models as Powerful Tools for Climate Change Ecology.
Degree: PhD, 2017, University of Washington
URL: http://hdl.handle.net/1773/38681
► Many scientists suggest that the Earth has entered a new geologic epoch, the Anthropocene, defined by human influence on nearly every physical and biological system.…
(more)
▼ Many scientists suggest that the Earth has entered a new geologic epoch, the Anthropocene, defined by human influence on nearly every physical and biological system. Climate change is perhaps the most widespread human impact. One ecological effect of climate change is the movement of species' habitats due to changes in temperature, precipitation, and other environmental variables. Populations may either track their habitats using dispersal, acclimate to new conditions with phenotypic plasticity, or adapt in place by rapid evolution. Though paleontological records give some clues about past responses to abrupt environmental change, the rapid pace of current climate trends leaves the fate of many species somewhat unknown. Ecologists must, therefore, rely on predictive models to anticipate the dynamics of populations adjusting to their moving habitats. In this work, I focus on a number of spatial models that describe populations responding to their moving habitats. In the first two studies, I use integrodifference equations to describe populations that grow and disperse in distinct stages. Researchers have already used integrodifference equations to model populations tracking their habitats. My goal is to extend their work by (a) adding spatial realism and (b) comparing the long-term and short-term population dynamics that can be observed. In a third study, I use an optimization model based on reserve design to explore optimal management strategies for a population tracking its habitat. The model offers a prescriptive plan for allocating conservation resources under a limited budget. In the first study, I model a population in two-dimensional space. I find that the shape of the population's moving habitat has a strong influence on the population's fate. The pattern of dispersal determines whether the population does best in a long habitat, a wide habitat, or a square habitat. Moreover, the study shows that simplified spatial models can greatly overestimate persistence compared to spatially realistic ones. In the second study, I focus on the short-term dynamics of a population tracking its habitat. The model shows that a mismatch can occur between short-term and long-term population trends, which creates a confounding effect for prediction and management. I focus on understanding when and why such a mismatch occurs, depending on the population's biology, environment, and spatial distribution. Finally, the third study highlights that management of vulnerable species during climate change must be dynamic. I focus on an at-risk population that grows, disperses, and acclimates as temperature increases over time. The model identifies, among a collection of habitat sites, the sequence of management actions that maximizes a conservation metric related to total population size. While many models incorporate dispersal into management decision analysis, this study makes an important advancement by including acclimation in an explicit way. My approach with these three studies is to develop models that (a) advance…
Advisors/Committee Members: Kot, Mark (advisor).
Subjects/Keywords: Climate change; Eigenvalues; Integrodifference equation; Moving habitat; Reserve design; Transient dynamics; Applied mathematics; Ecology; Environmental management; Quantitative ecology and resource management
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Phillips, A. J. (2017). Spatial Models as Powerful Tools for Climate Change Ecology. (Doctoral Dissertation). University of Washington. Retrieved from http://hdl.handle.net/1773/38681
Chicago Manual of Style (16th Edition):
Phillips, Austin Joseph. “Spatial Models as Powerful Tools for Climate Change Ecology.” 2017. Doctoral Dissertation, University of Washington. Accessed January 22, 2021.
http://hdl.handle.net/1773/38681.
MLA Handbook (7th Edition):
Phillips, Austin Joseph. “Spatial Models as Powerful Tools for Climate Change Ecology.” 2017. Web. 22 Jan 2021.
Vancouver:
Phillips AJ. Spatial Models as Powerful Tools for Climate Change Ecology. [Internet] [Doctoral dissertation]. University of Washington; 2017. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1773/38681.
Council of Science Editors:
Phillips AJ. Spatial Models as Powerful Tools for Climate Change Ecology. [Doctoral Dissertation]. University of Washington; 2017. Available from: http://hdl.handle.net/1773/38681

University of Kansas
22.
Harpole, Jared Kenneth.
A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups.
Degree: PhD, Psychology, 2015, University of Kansas
URL: http://hdl.handle.net/1808/21697
► Multiple-indicator multiple cause (MIMIC) models have become a popular latent variable method to detect differential item functioning (DIF) by practitioners. The ease of including groups…
(more)
▼ Multiple-indicator multiple cause (MIMIC) models have become a popular latent variable method to detect differential item functioning (DIF) by practitioners. The ease of including groups for DIF testing and the implementation of MIMIC models in structural
equation modeling software have helped drive the use of MIMIC models by applied researchers. However, there are several shortcomings within the methodological literature that are important questions yet to be addressed. First, only the case of two groups have been studied in simulations studies, yet practitioners are increasingly utilizing MIMIC models on more than two groups (e.g. Fleishman, Spector, & Altman, 2002; Sacco, Casado, & Unick, 2011; Sacco, Torres, Cunningham-Williams, Woods, & Unick, 2011; Woods, Oltmanns, & Turkheimer, 2009; Yang, Tommet, & Jones, 2009). Second, MIMIC models can be parameterized to test for non-uniform DIF (e.g. Woods & Grimm, 2011), but in current implementations Type I error rates were too high possibly due to assumption violations in the estimation of the latent interaction. Third, almost all previous simulations for MIMIC models have not considered the MIMIC model’s robustness to violations of the homogeneity of variance assumption (see Carroll, 2014 for an exception). A Monte Carlo simulation study was conducted to address these three shortcomings utilizing a 2 (number of groups) x 3 (latent variance differences) x 3 (sample size imbalance) factorial design and compar- ing the proposed Bayesian MIMIC model with an improved version of Lord’s (1980) χ 2 . Results of the simulation study indicated that when the assumption of homogeneity of latent variances held the Bayesian MIMIC model was a competitive method for assessing DIF. However, when the assumption was not met the Bayesian MIMIC model would not be recommended due to poor parameter recovery. Overall, this research provides evidence that practitioners should not use MIMIC models for testing DIF.
Advisors/Committee Members: Wu, Wei (advisor), Woods, Carol M (advisor), DeBoeck, Pascal R (cmtemember), Skorupski, William P (cmtemember), Templin, Jonathan (cmtemember), Johnson, David K (cmtemember).
Subjects/Keywords: Quantitative psychology; Psychology; Educational tests & measurements; Bayesian; Differential Item Functioning; MIMIC Model; Multiple Groups; Psychometrics; Structural Equation Modeling
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Harpole, J. K. (2015). A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/21697
Chicago Manual of Style (16th Edition):
Harpole, Jared Kenneth. “A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups.” 2015. Doctoral Dissertation, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/21697.
MLA Handbook (7th Edition):
Harpole, Jared Kenneth. “A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups.” 2015. Web. 22 Jan 2021.
Vancouver:
Harpole JK. A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups. [Internet] [Doctoral dissertation]. University of Kansas; 2015. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/21697.
Council of Science Editors:
Harpole JK. A Bayesian MIMIC Model for Testing Non-uniform DIF in Two and Three Groups. [Doctoral Dissertation]. University of Kansas; 2015. Available from: http://hdl.handle.net/1808/21697

University of Kansas
23.
Jorgensen, Terrence Dale.
Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis.
Degree: PhD, Psychology, 2015, University of Kansas
URL: http://hdl.handle.net/1808/19054
► I investigated the sampling behavior of DIC and WAIC in the context of selecting an optimal measurement model in Bayesian SEM, as well as the…
(more)
▼ I investigated the sampling behavior of DIC and WAIC in the context of selecting an optimal measurement model in Bayesian SEM, as well as the utility of highly constrained parameter estimates in detecting differential item functioning (DIF). I assessed the relative efficiency of WAIC compared to DIC, evaluated analytical WAIC SEs by calculating relative bias, and reported how often WAIC and DIC indicated a preference for each invariance model. I compared the power and Type I error rates for DIF detection across conditions, and assessed the quality of estimates by calculating bias and 95% CI coverage rates for key parameters. Results indicate that although WAIC has less sampling variability than DIC, their model preferences are similar. Both WAIC and DIC have greater power to detect that invariance constraints are untenable than AIC in using maximum likelihood (ML) estimation. In tests of null hypotheses that DIF parameters are zero, Bayesian credible intervals and ML modification indices have similar power, but Bayesian credible intervals have much lower Type I error rates.
Advisors/Committee Members: Wu, Wei (advisor), Deboeck, Pascal R (cmtemember), Woods, Carol M (cmtemember), Skorupski, William P (cmtemember), Johnson, Paul E (cmtemember).
Subjects/Keywords: Quantitative psychology and psychometrics; Bayesian; confirmatory factor analysis; differential item functioning; measurement equivalence / invariance; structural equation modeling
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jorgensen, T. D. (2015). Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/19054
Chicago Manual of Style (16th Edition):
Jorgensen, Terrence Dale. “Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis.” 2015. Doctoral Dissertation, University of Kansas. Accessed January 22, 2021.
http://hdl.handle.net/1808/19054.
MLA Handbook (7th Edition):
Jorgensen, Terrence Dale. “Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis.” 2015. Web. 22 Jan 2021.
Vancouver:
Jorgensen TD. Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis. [Internet] [Doctoral dissertation]. University of Kansas; 2015. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1808/19054.
Council of Science Editors:
Jorgensen TD. Selecting an Optimal Measurement Model and Detecting Differential Item Functioning Using Bayesian Confirmatory Factor Analysis. [Doctoral Dissertation]. University of Kansas; 2015. Available from: http://hdl.handle.net/1808/19054

Virginia Tech
24.
Sharma, Arvind Kumar.
Quantitative Stratigraphic Inversion.
Degree: PhD, Geosciences, 2006, Virginia Tech
URL: http://hdl.handle.net/10919/30172
► We develop a methodology for systematic inversion of quantitative stratigraphic models. Quantitative stratigraphic modeling predicts stratigraphy using numerical simulations of geologic processes. Stratigraphic inversion methodically…
(more)
▼ We develop a methodology for systematic inversion of
quantitative stratigraphic models.
Quantitative stratigraphic modeling predicts stratigraphy using numerical simulations of geologic processes. Stratigraphic inversion methodically searches the parameter space in order to detect models which best represent the observed stratigraphy. Model parameters include sea-level change, tectonic subsidence, sediment input rate, and transport coefficients. We successfully performed a fully automated process based stratigraphic inversion of a geologically complex synthetic model. Several one and two parameter inversions were used to investigate the coupling of process parameters. Source location and transport coefficient below base level indicated significant coupling, while the rest of the parameters showed only minimal coupling. The influence of different observable data on the inversion was also tested. The inversion results using misfit based on sparse, but time dependent sample points proved to be better than the misfit based on the final stratigraphy only, even when sampled densely. We tested several inversion schemes on the topography dataset obtained from the eXperimental EarthScape facility simulation. The clustering of model parameters in most of the inversion experiments showed the likelihood of obtaining a reasonable number of compatible models. We also observed the need for several different diffusion-coefficient parameterizations to emulate different erosional and depositional processes. The excellent result of the piecewise inversion, which used different parameterizations for different time intervals, demonstrate the need for development or incorporation of time-variant parameterizations of the diffusion coefficients. We also present new methods for applying boundary condition on simulation of diffusion processes using the finite-difference method. It is based on the straightforward idea that solutions at the boundaries are smooth. The new scheme achieves high accuracy when the initial conditions are non vanishing at the boundaries, a case which is poorly handled by previous methods. Along with the ease in implementation, the new method does not require any additional computation or memory.
Advisors/Committee Members: Imhof, Matthias G. (committeechair), Hole, John A. (committee member), Snoke, J. Arthur (committee member), Chapman, Martin C. (committee member), Eriksson, Kenneth A. (committee member).
Subjects/Keywords: Boundary Condition; Diffusion Equation; Numerical Modeling; Quantitative Stratigraphic Inversion
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sharma, A. K. (2006). Quantitative Stratigraphic Inversion. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/30172
Chicago Manual of Style (16th Edition):
Sharma, Arvind Kumar. “Quantitative Stratigraphic Inversion.” 2006. Doctoral Dissertation, Virginia Tech. Accessed January 22, 2021.
http://hdl.handle.net/10919/30172.
MLA Handbook (7th Edition):
Sharma, Arvind Kumar. “Quantitative Stratigraphic Inversion.” 2006. Web. 22 Jan 2021.
Vancouver:
Sharma AK. Quantitative Stratigraphic Inversion. [Internet] [Doctoral dissertation]. Virginia Tech; 2006. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10919/30172.
Council of Science Editors:
Sharma AK. Quantitative Stratigraphic Inversion. [Doctoral Dissertation]. Virginia Tech; 2006. Available from: http://hdl.handle.net/10919/30172
25.
Milletich, Robert J., II.
Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning.
Degree: PhD, Psychology, 2016, Old Dominion University
URL: 9781369564211
;
https://digitalcommons.odu.edu/psychology_etds/44
► Mediation and moderated mediation models are two commonly used models for indirect effects analysis. In practice, missing data is a pervasive problem in structural…
(more)
▼ Mediation and moderated mediation models are two commonly used models for indirect effects analysis. In practice, missing data is a pervasive problem in structural
equation modeling with psychological data. Multiple imputation (MI) is one method used to estimate model parameters in the presence of missing data, while accounting for uncertainty due to the missing data. Unfortunately, commonly used MI methods are not equipped to handle categorical variables or nonlinear variables such as interactions. In this study, we introduce a general MI framework that uses the Bayesian bootstrap (BB) method to generate posterior inferences for indirect effects and gradient boosted machine learning imputation models that can impute missing data in linear and logistic regression models with linear and nonlinear effects.
Two Monte Carlo simulation studies are conducted to examine the empirical performance of a BB procedure for estimation and inference of indirect effects and to examine the performance of the proposed imputation algorithm in indirect effects analysis. Results show that the BB has comparable performance to widely used frequentist methods (e.g., delta methods and nonparametric bootstrap with bias-correction) for indirect effects analysis for a variety of models and conditions. With missing data, in general, results indicate that the proposed MI framework has comparable performance to model-based estimation and other MI algorithms for indirect effects analysis in mediation models; for indirect effects analysis in moderated mediation models, results indicate that the proposed MI framework outperforms these methods in most conditions. Advantages and limitations of the BB as applied to indirect effects analysis are discussed.
Advisors/Committee Members: Michelle L. Kelley, James F. Paulson, Norou Diawara.
Subjects/Keywords: Bayesian bootstrap; Machine learning; Mediation; Missing data; Moderated mediation; Structural equation modeling; Computer Sciences; Quantitative Psychology; Statistics and Probability
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Milletich, Robert J., I. (2016). Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781369564211 ; https://digitalcommons.odu.edu/psychology_etds/44
Chicago Manual of Style (16th Edition):
Milletich, Robert J., II. “Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning.” 2016. Doctoral Dissertation, Old Dominion University. Accessed January 22, 2021.
9781369564211 ; https://digitalcommons.odu.edu/psychology_etds/44.
MLA Handbook (7th Edition):
Milletich, Robert J., II. “Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning.” 2016. Web. 22 Jan 2021.
Vancouver:
Milletich, Robert J. I. Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning. [Internet] [Doctoral dissertation]. Old Dominion University; 2016. [cited 2021 Jan 22].
Available from: 9781369564211 ; https://digitalcommons.odu.edu/psychology_etds/44.
Council of Science Editors:
Milletich, Robert J. I. Multiple Imputation of Missing Data in Structural Equation Models with Mediators and Moderators Using Gradient Boosted Machine Learning. [Doctoral Dissertation]. Old Dominion University; 2016. Available from: 9781369564211 ; https://digitalcommons.odu.edu/psychology_etds/44

University of Bristol
26.
Griffith, Gareth.
How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.
Degree: PhD, 2019, University of Bristol
URL: https://research-information.bris.ac.uk/en/studentTheses/3e2245e1-9fd9-407b-9bf0-de8e6865fb08
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.782685
► Mental Health is an issue of increasingly accepted importance in the UK, both in policy and in the public sphere. It becomes clear under scrutiny,…
(more)
▼ Mental Health is an issue of increasingly accepted importance in the UK, both in policy and in the public sphere. It becomes clear under scrutiny, however, that any attempt to characterise and prioritise "at risk" groups risks making conclusions entirely sensitive to the definition of mental health chosen by the researcher. This thesis examines the definition and distribution of the mental health conditions which have been the backdrop for this increase in awareness. This involves combining innovative quantitative methodologies in order to develop a comprehensive understanding of UK mental health from 2009-2016. The thesis is divided into two halves. The first half addresses the definition of mental health. Mental health measurement can be crudely categorised into theories which characterise mental health via absence of negative elements and presence of positive elements. Unpacking what is truly captured by the most widely used population screening metrics for each is undertaken using Exploratory Structural Equation Modelling (ESEM). Solutions for both metrics are presented and demonstrated to be both substantively and empirically superior to traditional summed interpretation. The second half of the thesis incorporates these newly suggested interpretations into an investigation of the distribution of mental health across the UK using advanced multilevel modelling techniques. Firstly, a demonstration of what could be known given the summed interpretation of the metrics is given. This demonstrates the differences between the geographical and demographic determinants of the metrics. Finally, the constructs developed from the ESEM analysis become responses in a longitudinal investigation of chronicity in mental health. This presents the first comprehensive overview of UK mental health incorporating both ESEM and Multilevel Modelling. It represents clear evidence of the synergy of the two methodologies. Moreover, the empirical findings of the thesis are relevant and important for central and local governments in developing geographically-sensitive mental health policy.
Subjects/Keywords: 550; Mental Health; Geography; Measurement; Psychology; Wellbeing; Multilevel Modelling; Structural Equation Modelling; Advanced Quantitative Methods; Epidemiology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Griffith, G. (2019). How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. (Doctoral Dissertation). University of Bristol. Retrieved from https://research-information.bris.ac.uk/en/studentTheses/3e2245e1-9fd9-407b-9bf0-de8e6865fb08 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.782685
Chicago Manual of Style (16th Edition):
Griffith, Gareth. “How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.” 2019. Doctoral Dissertation, University of Bristol. Accessed January 22, 2021.
https://research-information.bris.ac.uk/en/studentTheses/3e2245e1-9fd9-407b-9bf0-de8e6865fb08 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.782685.
MLA Handbook (7th Edition):
Griffith, Gareth. “How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health.” 2019. Web. 22 Jan 2021.
Vancouver:
Griffith G. How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. [Internet] [Doctoral dissertation]. University of Bristol; 2019. [cited 2021 Jan 22].
Available from: https://research-information.bris.ac.uk/en/studentTheses/3e2245e1-9fd9-407b-9bf0-de8e6865fb08 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.782685.
Council of Science Editors:
Griffith G. How can we best understand mental health in the UK? : critically and empirically investigating the measurement, and socio-demographic and geographical predictors of UK mental health. [Doctoral Dissertation]. University of Bristol; 2019. Available from: https://research-information.bris.ac.uk/en/studentTheses/3e2245e1-9fd9-407b-9bf0-de8e6865fb08 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.782685

Arizona State University
27.
Xu, Yuning.
Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling.
Degree: Educational Psychology, 2018, Arizona State University
URL: http://repository.asu.edu/items/50462
► Investigation of measurement invariance (MI) commonly assumes correct specification of dimensionality across multiple groups. Although research shows that violation of the dimensionality assumption can cause…
(more)
▼ Investigation of measurement invariance (MI) commonly
assumes correct specification of dimensionality across multiple
groups. Although research shows that violation of the
dimensionality assumption can cause bias in model parameter
estimation for single-group analyses, little research on this issue
has been conducted for multiple-group analyses. This study explored
the effects of mismatch in dimensionality between data and analysis
models with multiple-group analyses at the population and sample
levels. Datasets were generated using a bifactor model with
different factor structures and were analyzed with bifactor and
single-factor models to assess misspecification effects on
assessments of MI and latent mean differences. As baseline models,
the bifactor models fit data well and had minimal bias in latent
mean estimation. However, the low convergence rates of fitting
bifactor models to data with complex structures and small sample
sizes caused concern. On the other hand, effects of fitting the
misspecified single-factor models on the assessments of MI and
latent means differed by the bifactor structures underlying data.
For data following one general factor and one group factor
affecting a small set of indicators, the effects of ignoring the
group factor in analysis models on the tests of MI and latent mean
differences were mild. In contrast, for data following one general
factor and several group factors, oversimplifications of analysis
models can lead to inaccurate conclusions regarding MI assessment
and latent mean estimation.
Subjects/Keywords: Educational tests &; measurements; Quantitative psychology; Statistics; bifactor models; dimensionality; latent means; measurement invariance; simulation; structural equation modeling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xu, Y. (2018). Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling. (Doctoral Dissertation). Arizona State University. Retrieved from http://repository.asu.edu/items/50462
Chicago Manual of Style (16th Edition):
Xu, Yuning. “Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling.” 2018. Doctoral Dissertation, Arizona State University. Accessed January 22, 2021.
http://repository.asu.edu/items/50462.
MLA Handbook (7th Edition):
Xu, Yuning. “Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling.” 2018. Web. 22 Jan 2021.
Vancouver:
Xu Y. Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling. [Internet] [Doctoral dissertation]. Arizona State University; 2018. [cited 2021 Jan 22].
Available from: http://repository.asu.edu/items/50462.
Council of Science Editors:
Xu Y. Assessing Measurement Invariance and Latent Mean Differences
with Bifactor Multidimensional Data in Structural Equation
Modeling. [Doctoral Dissertation]. Arizona State University; 2018. Available from: http://repository.asu.edu/items/50462
28.
Madani, Tarik.
Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings.
Degree: Docteur es, Mécanique et Génie Civil, 2015, Montpellier
URL: http://www.theses.fr/2015MONTS173
► Le présent travail de thèse fait suite à une première étude où une stratégie d’identification des paramètres et formes des lois de zones cohésives a…
(more)
▼ Le présent travail de thèse fait suite à une première étude où une stratégie d’identification des paramètres et formes des lois de zones cohésives a été élaborée pour des matériaux homogènes. L’extension au cas de matériaux présentant des hétérogénéités nécessite d’accéder localement aux champs de contraintes.Ainsi, l’objectif principal de cette étude est de mettre au point une méthode de caractérisation locale des propriétés mécaniques et des contraintes. Cette méthode est basée sur l’erreur en relation de comportement combinée à l’exploitation de la richesse des mesures de champs cinématiques planes et plus particulièrement des champs de déformations, obtenus par dérivation numérique des champs de déplacements. Cette mesure cinématique est réalisée par une technique de corrélation d’images numériques enrichie.La méthode d’identification est basée sur la minimisation itérative d’une norme énergétique faisant intervenir le tenseur élastoplastique sécant. Différentes simulations numériques ont illustré la capacité de la procédure à identifier localement des champs de propriétés hétérogènes et sa robustesse et sa stabilité vis-à-vis du bruit de mesure, du choix du jeu de paramètres d’initialisation de l’algorithme et de la finesse du maillage.Pour finir, des essais plans avec différentes géométries d’éprouvettes ont été effectués et un essai a été mis au point pour obtenir de manière maîtrisée un état initial très hétérogène. Les résultats d’identification élastoplastique multilinéaire ont montré la capacité de la méthode à identifier les lois de comportements locales sur ce matériau hétérogène.
The present work follows a first approach where a strategy for identifying the shape and the parameters of cohesive-zone laws has been developed for homogeneous materials. The extension of this method to heterogeneous material requires the knowledge of the local stress state.The study aims at developing a local characterization method for mechanical properties and stresses. This method is based on the constitutive equation gap principles and relies on the knowledge of mechanical kinematic fields and particularly of the strain fields. These fields are obtained by the numerical differentiation of displacement fields measured by digital image correlation.This identification method is based on the iterative minimization of an energy norm involving the secant elastoplastic tensor. Various numerical simulations were used to illustrate the performance of the procedure for locally identifying heterogeneous property fields, and to characterize its robustness and its stability with respect to noise to the values of the algorithm initialization parameter and to the mesh refinement.Finally, various experimental tests with different specimen geometries were performed and a test has been developed to obtain a controlled heterogeneous initial state. The multilinear elastoplastic identification results showed the ability of the method to identify the local behavior properties on heterogeneous materials.
Advisors/Committee Members: Wattrisse, Bertrand (thesis director).
Subjects/Keywords: Problèmes inverses; Erreur en relation de comportement; Mesures de champs; Corrélation d’images Numériques (DIC); Thermographie infrarouge (IRT); Modèles de Zones Cohésives; Inverse problems; Constitutive equation gap method; Full field measurements; Digital Image Correlation (DIC); Infrared Thermography (IRT); Cohesive Zone models
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Madani, T. (2015). Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings. (Doctoral Dissertation). Montpellier. Retrieved from http://www.theses.fr/2015MONTS173
Chicago Manual of Style (16th Edition):
Madani, Tarik. “Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings.” 2015. Doctoral Dissertation, Montpellier. Accessed January 22, 2021.
http://www.theses.fr/2015MONTS173.
MLA Handbook (7th Edition):
Madani, Tarik. “Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings.” 2015. Web. 22 Jan 2021.
Vancouver:
Madani T. Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings. [Internet] [Doctoral dissertation]. Montpellier; 2015. [cited 2021 Jan 22].
Available from: http://www.theses.fr/2015MONTS173.
Council of Science Editors:
Madani T. Identification expérimentale de comportements élastoplastiques de matériaux hétérogènes pour des sollicitations complexes : Experimental identification of elastoplastic behavior of heterogeneous materials under complex loadings. [Doctoral Dissertation]. Montpellier; 2015. Available from: http://www.theses.fr/2015MONTS173

Universitat Politècnica de Catalunya
29.
Tejedor Herrán, Blanca.
Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography).
Degree: Departament d'Enginyeria Civil i Ambiental, 2019, Universitat Politècnica de Catalunya
URL: http://hdl.handle.net/10803/665319
► Dins el Marc Europeu, la majoria dels edificis residencials no satisfan les especificacions tèrmiques mínimes. De fet, la taxa de renovació a Europa és estimada…
(more)
▼ Dins el Marc Europeu, la majoria dels edificis residencials no satisfan les especificacions tèrmiques mínimes. De fet, la taxa de renovació a Europa és estimada en 1% anual. Per complir amb els objectius de les Directives Europees 2010/31/UE i 2012/27/UE, és necessari assegurar una bretxa energètica mínima. A partir d'un estat de l'art exhaustiu, es va detectar que el comportament tèrmic d'un edifici sovint és subestimat o negligit durant les etapes de construcció i operació. Per aquest motiu, una prova no destructiva i precisa hauria de ser requerida, per tal de millorar les deficiències donades per les actuals eines de modelització i diagnosi d'edificis. El propòsit de la tesi era desenvolupar un mètode per determinar in-situ el comportament tèrmic de les façanes sota condicions estacionàries mitjançant la termografia quantitativa interna (IRT). Després d'elaborar un model numèric per estimar la transmitància tèrmica (U-value) com a paràmetre clau de la qualitat construïda, la dissertació va continuar amb un procés de validació executat en dues parets típiques espanyoles de diferents períodes de construcció. Això va permetre: (i) refinar el mètode proposat; (ii) explorar les condicions de contorn; (iii) avaluar la influència dels valors tabulats establerts per les normatives internacionals per l'emissivitat de la paret i els coeficients de transferència de calor per convecció. Els resultats van revelar baixes desviacions respecte als valors teòrics de transmitància tèrmica (1.24 a 3.97%) per duracions de test entre 2 i 3 hores. A més a més, els resultats van demostrar que l’ús de valors tabulats podria implicar altes desviacions (40%) en parets compostes. En general, els projectes de construcció d'edificis existents antics no estan disponibles. Per tant, aquest mètode podria proporcionar informació sobre la façana per futures rehabilitacions. En el cas d’edificis nous, el mètode podria permetre verificar el comportament tèrmic de les parets d’acord amb els paràmetres de disseny. Malgrat això, una revisió bibliogràfica posterior va posar de manifest que encara hi ha una bretxa en la estandardització d’aquest mètode per la diagnosi in-situ. Considerant aquest aspecte, es van desenvolupar tres estudis per tal de millorar l’aplicabilitat de la termografia quantitativa interna dins el camp de la indústria de la construcció. En primer lloc, es va analitzar la influència de les condicions operatives en la determinació de la transmitància tèrmica mesurada a través duna cambra experimental amb una façana simple sota un ampli rang de diferència de temperatura (3.8 < DT < 21ºC). En segon lloc, es van dur a terme tests en un parc d’habitatges públics constituïts per quatre pisos desocupats (sense sistemes elèctrics ni de calefacció en funcionament), amb la finalitat d’analitzar la influència de les propietats termofísiques no transitòries (ex. la capacitat de calor per unitat d’àrea) en la precisió del mètode. En tercer lloc, es va proposar i validar un mètode de processat de dades basat en l’anàlisi de sèries de temps de la…
Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Casals Casanova, Miquel (director), Roca Ramon, Xavier (codirector).
Subjects/Keywords: Energy performance gap; Non-destructive testing (NDT); Quantitative infrared thermography; Measured U-value; Real built environment; Building façade; Heat capacity per unit of area; Bretxa rendiment energètic; Façanes; Transmitància tèrmica mesurada; Àrees temàtiques de la UPC::Enginyeria civil; 69
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tejedor Herrán, B. (2019). Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography). (Thesis). Universitat Politècnica de Catalunya. Retrieved from http://hdl.handle.net/10803/665319
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tejedor Herrán, Blanca. “Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography).” 2019. Thesis, Universitat Politècnica de Catalunya. Accessed January 22, 2021.
http://hdl.handle.net/10803/665319.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tejedor Herrán, Blanca. “Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography).” 2019. Web. 22 Jan 2021.
Vancouver:
Tejedor Herrán B. Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography). [Internet] [Thesis]. Universitat Politècnica de Catalunya; 2019. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10803/665319.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tejedor Herrán B. Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography). [Thesis]. Universitat Politècnica de Catalunya; 2019. Available from: http://hdl.handle.net/10803/665319
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Schrijer, F.F.J.
Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube.
Degree: 2010, Proefschriftenmaken.nl
URL: http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
;
urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
;
urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
;
http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
► To further improve the design of hypersonic vehicles so that fully reusable systems become a reality, the detailed understanding of the ?ow ?eld that the…
(more)
▼ To further improve the design of hypersonic vehicles so that fully reusable systems become a reality, the detailed understanding of the ?ow ?eld that the vehicle generates is of paramount importance. The thesis deals with the aspects of experimental ?ow research which includes also the ?ow facility and the measurement techniques. First a description is given of the investigation and assessment of the Hypersonic Test Facility Delft (HTFD), which is the facility used in the experiments. Thereafter two measurement techniques, particle image velocimetry (PIV) and
quantitative infrared
thermography (QIRT) are introduced that enable to obtain high quality measurement data of the hypersonic ?ow ?eld generated by the HTFD. In the remainder of the thesis two important ?ow phenomena, shock wave boundary layer interaction and boundary layer transition, have been investigated using PIV and QIRT that are of great importance for re-entry vehicles.
Advisors/Committee Members: Scarano, F..
Subjects/Keywords: re-entry; hypersonic flow; wind tunnel; particle image velocimetry; quantitative infrared thermography; boundary layer transition; shock wave boundary layer interaction
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APA (6th Edition):
Schrijer, F. F. J. (2010). Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube. (Doctoral Dissertation). Proefschriftenmaken.nl. Retrieved from http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
Chicago Manual of Style (16th Edition):
Schrijer, F F J. “Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube.” 2010. Doctoral Dissertation, Proefschriftenmaken.nl. Accessed January 22, 2021.
http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133.
MLA Handbook (7th Edition):
Schrijer, F F J. “Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube.” 2010. Web. 22 Jan 2021.
Vancouver:
Schrijer FFJ. Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube. [Internet] [Doctoral dissertation]. Proefschriftenmaken.nl; 2010. [cited 2021 Jan 22].
Available from: http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133.
Council of Science Editors:
Schrijer FFJ. Experimental investigation of re-entry aerodynamic phenomena - Development of non-intrusive ?ow diagnostics in a Ludwieg tube. [Doctoral Dissertation]. Proefschriftenmaken.nl; 2010. Available from: http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; urn:NBN:nl:ui:24-uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133 ; http://resolver.tudelft.nl/uuid:cad92d3e-b8e3-48ed-a23e-e0fecd2a8133
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