Dissertations / Theses on the topic 'Weight and shape'
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Harris, Caroline J. "Assessing children's body shape and weight concern." Thesis, University of Leeds, 2002. http://etheses.whiterose.ac.uk/232/.
Full textRiley, Helen. "Perfectionism and thoughts about eating, weight and shape." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421196.
Full textFranklin, Julie A. "Inter-generational transmission of values regarding weight, shape and appearance." Thesis, University of Leeds, 2002. http://etheses.whiterose.ac.uk/253/.
Full textRan, Romi. "Eating disorders : the role of factors beyond eating, weight and shape." Thesis, University of Oxford, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589525.
Full textNelson, Sara J. "Body-weight and shape-attentional biases in non-clinically eating disordered women." Thesis, University of Bristol, 2006. http://hdl.handle.net/1983/d56ef613-3768-4b27-89ec-8173e411a40a.
Full textCHAKKALAKKAL, JOSEPH JUNIOR. "Design of a weight optimized casted ADI component using topology and shape optimization." Thesis, KTH, Maskin- och processteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236518.
Full textStrukturoptimering används ofta i produktutvecklingsprocessen i modern industri för att ta fram optimala konstruktioner med minsta möjliga materialåtgång för komponenten. Konventionella konstruktionsmetoder genererar vanligtvis överdimensionerade komponenter med överflödigt material och vikt. Detta ökar i sin tur livstidskostnaderna för maskiner både i termer av materialavfall och användning. Avhandlingen "Konstruktion av viktoptimerad gjuten ADI-komponent" behandlar omkonstruktionen av en komponent från en svetsad stålplåtstruktur till en gjutbar konstruktion med minskad tillverkningskostnad och vikt. Komponenten “Borrstöd” monterad i framkant av bommen på en ortdrivningsmaskin är omkonstruerad under detta arbete. Huvudsyftet med avhandlingen är ta fram en alternativ konstruktion med lägre vikt och som kan monteras på befintlig maskinlayout utan någon ändring i monteringsgränssnittet. Denna avhandling innehåller en detaljerad beskrivning av förfarandet för att uppnå viktminskningen av "borrstödet" och presenterar resultaten samt metodiken som baseras på både topologi- och parameter- optimering.
Burrows, Alison. "Concerns about weight and shape in overweight 12 year old girls and their mothers." Thesis, Open University, 1998. http://oro.open.ac.uk/57737/.
Full textMarks, Penelope June. "Direct and correlated responses to selection to change the shape of the growth curve in mice." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/15266.
Full textHoltom-Viesel, Anita. "Development and exploration of the shape, weight and eating scale with an eating disorder population." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/9898.
Full textMorin, Brooke C. "The effect of speed and body weight support on the ankle-foot roll-over shape." Connect to resource, 2009. http://hdl.handle.net/1811/44509.
Full textLofton, Stacy L. "Attitudes and Behaviors Toward Weight, Body Shape and Eating in Male and Female College Students." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2713/.
Full textHolt, Kate, and mikewood@deakin edu au. "Preventing weight and muscle concerns among preadolescents." Deakin University. School of Psychology, 2005. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20050825.094217.
Full textLi, Wen. "Solute diffusion in the bone lacunar-canalicular system its dependency on molecular weight, shape, and charge /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 75 p, 2009. http://proquest.umi.com/pqdweb?did=1694433001&sid=9&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Full textFrampton, Ian. "Are overvalued ideas about weight and shape overvalued ideas in the diagnosis of early onset anorexia nervosa?" Thesis, University of Exeter, 1996. http://hdl.handle.net/10036/35552.
Full textDallacker, Mattea [Verfasser]. "Social determinants of obesity: How parents shape the eating behavior and body weight of their children / Mattea Dallacker." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1150704535/34.
Full textSwami, Viren Vasudev. "Evolutionary psychology and the study of human physical attractiveness : the influence of body weight and shape across cultures." Thesis, University College London (University of London), 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424388.
Full textBell, Caroline. "The Eating Disorder Belief questionnaire in adolescent girls, and predictors of behaviour, and weight, shape and eating concerns." Thesis, Open University, 2001. http://oro.open.ac.uk/58167/.
Full textDoyle, Suzi. "'Body of evidence' : the experience of patients with anorexia nervosa regarding imagery related to food, weight and shape." Thesis, Middlesex University, 2013. http://eprints.mdx.ac.uk/13058/.
Full textBassra, Pavan. "A qualitative exploration of how British, Muslim young women implicate Asian culture in their accounts of eating, weight and shape." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437657.
Full textNugent, Russell Arthur. "Analysis of newborn calf body measurements and relationship of calf shape to sire breeding values for birth weight and calving ease." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135956/.
Full textRose, Kathryn. "The eating disorder belief questionnaire in 17-18 year old girls and predictors of behaviour, and weight, shape and eating concerns." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275180.
Full textXu, Xiaoqian. "Shape Matching, Relevance Feedback, and Indexing with Application to Spine X-Ray Image Retrieval." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1648.pdf.
Full textHunt, Jenny. "Selective memory bias in the processing of weight, shape and food related words in women with bulimia nervosa, depression and female non-clinical controls." Thesis, Open University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242702.
Full textAshton, Stephanie. "Exploration and comparison of cognitions and metacognitions related to eating, weight and shape described by obese people who do and do not report binge eating." Thesis, University of East Anglia, 2013. https://ueaeprints.uea.ac.uk/48044/.
Full textSawadkosin, Paranee. "Optimalizace tvaru strojních součástí s vlivem variabililty vstupních údajů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401572.
Full textWheatley-Brown, Michèle T. "An Analysis of Terminology Describing the Physical Aspect of Piano Technique." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20434.
Full textBen, abdalah Abir. "Influence du vieillissement sur l'effet mémoire des polymères / Modélisation du mécanisme de mémoire de forme." Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE046.
Full textThe aim of this thesis is to characterize the Shape Memory Effect (SME) of the (40% PCL/60% SBS) blend and to study the influence of the molecular weight and the physicochemical properties on this SME. Firstly, experimental characterization is performed in order to evaluate the physicochemical, morphological and mechanical properties of the used materials. The (PCL/SBS) blend exhibits a Total SME (TSME) as it recovers 100% of its original shape after one shape memory cycle. The energy stored in the structure acts as the driving force that can be responsible for this SME. Therefore, an original method using a witness is used to establish the stress-strain evolution during recovery. Secondly, to change the molecular weight of PCL in the blend, enzymatic hydrolytic degradation using an Amano Lipase from Pseudomonas fluorescens is carried out. The influence of hydrolysis on the pure PCL properties is evaluated. Then, sampling is carried out and (PCL/SBS) blends with different PCL molecular weights are obtained. Subsequently, these blends are submitted to experimental and shape memory tests to study the relationship between the molecular weight and the SME. The results show that the decrease in the molecular weight causes morphological and structural changes: the increase in stiffness and the embrittlement of the mixture, the decrease in compatibility, the increase in heterogeneity and the loss of thermo-dynamical balance of phases. These changes in the molecular weight and in the properties of blends influence its recovery capacity. The blend with the TSME is transformed to a polymer with partial SME. Finally, a bi-parabolic model is used to predict the viscoelastic behavior of the (40% PCL / 60% SBS) blend before and after its enzymatic hydrolytic aging
Tanner, Allison. "Strength of Masonry Grout Made with Expanded Shale." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4018.
Full textHavlíková, Ivana. "Dynamická analýza konstrukce zatížené seismickým zatížením." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225730.
Full textNikjoo, Soukhtabandani Ali. "Partial shape matching using CCP map and weighted graph transformation matching." Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30611/30611.pdf.
Full textMatching and detecting similarity or dissimilarity between images is a fundamental problem in image processing. Different matching algorithms are used in literature to solve this fundamental problem. Despite their novelty, these algorithms are mostly inefficient and cannot perform properly in noisy situations. In this thesis, we solve most of the problems of previous methods by using a reliable algorithm for segmenting image contour map, called CCP Map, and a new matching method. In our algorithm, we use a local shape descriptor that is very fast, invariant to affine transform, and robust for dealing with non-rigid objects and occlusion. After finding the best match for the contours, we need to verify if they are correctly matched. For this matter, we use the Weighted Graph Transformation Matching (WGTM) approach, which is capable of removing outliers based on their adjacency and geometrical relationships. WGTM works properly for both rigid and non-rigid objects and is robust to high order distortions. For evaluating our method, the ETHZ dataset including five diverse classes of objects (bottles, swans, mugs, giraffes, apple-logos) is used. Finally, our method is compared to several famous methods proposed by other researchers in the literature. While our method shows a comparable result to other benchmarks in terms of recall and the precision of boundary localization, it significantly improves the average precision for all of the categories in the ETHZ dataset.
Gerritsen, Bart H. M. "Using weighted alpha complexes in subsurface modelling : reconstructing the shape of observed natural objects /." Delft : DUP Science, 2001. http://www.library.tudelft.nl/dissertations/main/Civil%20Engineering%20and%20Geosciences/20011126.pdf.
Full textJullian, Christelle Francoise. "Self-Assembly of Matching Molecular Weight Linear and Star-Shaped Polyethylene glycol Molecules for Protein Adsorption Resistance." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29581.
Full textPh. D.
Cament, Riveros Leonardo. "Enhancements by weighted feature fusion, selection and active shape model for frontal and pose variation face recognition." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/132854.
Full textFace recognition is one of the most active areas of research in computer vision because of its wide range of possible applications in person identification, access control, human computer interfaces, and video search, among many others. Face identification is a one-to-n matching problem where a captured face is compared to n samples in a database. In this work a new method for robust face recognition is proposed. The methodology is divided in two parts, the first one focuses in face recognition robust to illumination, expression and small age variation and the second part focuses in pose variation. The proposed algorithm is based on Gabor features; which have been widely studied in face identification because of their good results and robustness. In the first part, a new method for face identification is proposed that combines local normalization for an illumination compensation stage, entropy-like weighted Gabor features for a feature extraction stage, and improvements in the Borda count classification through a threshold to eliminate low-score Gabor jets from the voting process. The FERET, AR, and FRGC 2.0 databases were used to test and compare the proposed method results with those previously published. Results on these databases show significant improvements relative to previously published results, reaching the best performance on the FERET and AR databases. Our proposed method also showed significant robustness to slight pose variations. The method was tested assuming noisy eye detection to check its robustness to inexact face alignment. Results show that the proposed method is robust to errors of up to three pixels in eye detection. However, face identification is strongly affected when the test images are very different from those of the gallery, as is the case in varying face pose. The second part of this work proposes a new 2D Gabor-based method which modifies the grid from which the Gabor features are extracted using a mesh to model face deformations produced by varying pose. Also, a statistical model of the Borda count scores computed by using the Gabor features is used to improve recognition performance across pose. The method was tested on the FERET and CMU-PIE databases, and the performance improvement provided by each block was assessed. The proposed method achieved the highest classification accuracy ever published on the FERET database with 2D face recognition methods. The performance obtained in the CMU-PIE database is among those obtained by the best published methods. Extensive experimental results are provided for different combinations of the proposed method, including results with two poses enrolled as a gallery.
Forbes, Margaret G. "Phosphorus Retention and Fractionation in Masonry Sand and Light Weight Expanded Shale Used as Substrate in a Subsurface Flow Wetland." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3183/.
Full textRuiz, Fernández Guillermo. "3D reconstruction for plastic surgery simulation based on statistical shape models." Doctoral thesis, Universitat Pompeu Fabra, 2018. http://hdl.handle.net/10803/667049.
Full textAquesta tesi ha estat realitzada a Crisalix amb la col·laboració de la Universitat Pompeu Fabra sota el pla de Doctorats Industrials. Crisalix té com a objectiu la millora de la comunicació entre els professionals de la cirurgia plàstica i els pacients, proporcionant una solució a la pregunta que sorgeix més freqüentment durant el procés de planificació d'una operació quirúrgica ``Com em veuré després de la cirurgia?''. La solució proposada per Crisalix està basada en la tecnologia d'imatge 3D. Aquesta tecnologia genera la reconstrucció 3D de la zona del pacient operada, seguit de la possibilitat de crear múltiples simulacions obtenint la representació dels possibles resultats de la cirurgia. Aquesta tesi presenta un sistema capaç de reconstruir cares i pits de pacients de cirurgia plàstica a partir de fotos 2D i escanegis. La reconstrucció en 3D d'un objecte és un problema complicat degut a la presència d'ambigüitats. Els mètodes basats en models estadístics son adequats per mitigar-les. En aquest treball, hem seguit la intuïció de maximitzar l'ús d'informació prèvia, introduint-la al model estadístic per millorar les seves propietats. En primer lloc, explorem els Active Shape Models (ASM) que són un conegut mètode fet servir per alinear contorns d'objectes 2D. No obstant, un cop aplicades les correccions de forma del model estadístic, es difícil de mantenir informació de la que es disposava a priori (per exemple, un petit conjunt de punts donat) inalterada. Proposem una nova projecció ponderada amb un terme de regularització, que permet obtenir formes que compleixen les restriccions de forma imposades i alhora són plausibles en concordança amb el model estadístic. En segon lloc, ampliem la metodologia per aplicar-la als anomenats 3D Morphable Models (3DMM) que són un mètode extensivament utilitzat per fer reconstrucció 3D. No obstant, els mètodes de 3DMM existents presenten algunes limitacions. Alguns estan basats en optimitzacions no lineals, computacionalment costoses i que poden quedar atrapades en mínims locals. Una altra limitació, és que no tots el mètodes proporcionen la resolució adequada per representar amb precisió els detalls de l'anatomia. Donat l'ús mèdic de l'aplicació, la precisió i la robustesa són factors molt importants a tenir en compte. Mostrem com la inicialització i l'ajustament de 3DMM poden ser millorats fent servir la projecció ponderada amb regularització proposada. Finalment, es presenta un sistema capaç de reconstruir models 3D de pacients de cirurgia plàstica a partir de dos possibles tipus de dades: imatges 2D i escaneigs en 3D. El nostre mètode es fa servir en diverses etapes del procés de reconstrucció: alineament de formes en imatge, la inicialització i l'ajustament de 3DMM. Els mètodes desenvolupats han estat integrats a l'entorn de producció de Crisalix provant la seva validesa.
Carter, Megan Ann. "Do Childhood Excess Weight and Family Food Insecurity Share Common Risk Factors in the Local Environment? An Examination Using a Quebec Birth Cohort." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23801.
Full textShennib, H., K. Hickle, and B. Bowles. "Axillary vein thrombosis induced by an increasingly popular oscillating dumbbell exercise device: a case report." BioMed Central, 2015. http://hdl.handle.net/10150/610314.
Full textBlomkvist, Oscar. "Smart Beta - index weighting." Thesis, KTH, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168745.
Full textDenna studie är ett examensarbete som avslutar ett 120 poängs mastersprogram i Matematik med inriktning mot Finansiell Matematik och Matematisk Statistik på Kungliga Tekniska Högskolan (KTH). Ämnet Smart beta studeras i kontexten av en indexfond, där de olika testade principerna för viktning i portföljerna är: likaviktad, maximerad Sharpe-kvot, maximerad diversifiering, och fundamental viktning användandes av P/E-tal. Utfallet i testerna utvärderas i ackumulerad avkastning, portföljrisk, kostnad att handla i portföljen, och ett antal mått på fördelningen av tillgångarna. Studien går stegvis igenom processen för att samla in, ordna, och ”tvätta” data. En kort förklaring av historisk simulering, metoden för att estimera stokastiska variabler såsom kovariansmatriser, är inkluderad, såväl som en analys av distributionen av data. Processen för att optimera portföljerna och hur regler för att vara en UCITS-fond kan omformas till optimeringsvillkor beskrivs. Resultaten indikerar att alla utom den mest diversifierade portföljen har högre ackumulerad avkastning än den marknadsviktade portföljen under testperioden. I alla testade fall ökar handelsvolymen liksom marknadspåverkan när en annan strategi än marknadsviktad används. Portföljen med maximerad Sharpe-kvot ger en hög avkastning med bibehållen låg risk. Den fundamentalt viktade portföljen ger bäst avkastning, men med en litet förhöjd risk. Kombinationen av de båda metoderna ger den portföljen med högst ackumulerad avkastning och samtidigt lägst risk under testperioden.
Heptner, Nils. "Dynamics and non-equilibrium structure of colloidal dumbbell-shaped particles in dense suspensions." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17518.
Full textBesides being important for industrial applications, colloidal suspensions have long served as model systems for investigating the structure and dynamics of condensed matter. Recently, it has been demonstrated experimentally that apparently a small particle anisotropy is sufficient to dramatically change the viscoelastic response under external shearing fields, of which the microscopic mechanisms are not yet sufficiently understood. In the present work, NEBD simulations of colloidal hard dumbbells in oscillatory shear fields are developed and employed to elucidate the novel findings in close connection with comprehensive rheology and SANS experiments. Furthermore, by utilising BD simulations and linear response theory, the impact of anisotropy on structure and dynamics of such suspensions in equilibrium is analysed. In the linear response limit, the shear viscosity exhibits a dramatic increase at high packing fractions beyond a critical anisotropy of the particles. This indicates that newly occurring, collective rotational-translational couplings must be made responsible for slow time scales appearing in the PC. Moreover, a non-equilibrium transition emerging at moderate aspect ratios is revealed by NEBD of plastic crystalline suspensions under oscillatory shear. This transition behaviour is systematically studied. It is demonstrated that the continuous nature of the transition is retained for very low aspect ratios only. Above a certain aspect ratio, the transition is mediated by an intermediate disordered state. Furthermore, a partially oriented sliding layer state featuring a finite collective order in the particles'' orientations is observed at high strains. Hence, this thesis demonstrates that the NEBD simulations explain novel phenomena in rheology and scattering experiments. In the light of these experiments, it is shown that the orientational degree of freedom has a vigorous impact on the structural transition under increasing oscillatory shear.
De, Goede Andre. "Investigating certain share buyback transactions by companies listed on the JSE for the period 2000 to 2005." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/818.
Full textENGLISH ABSTRACT: Prior to 30 June 1999 companies in South Africa were not allowed to buy back their own shares. Amendments to the Companies Act, the Companies Amendment Act (Act 37 of 1999) radically changed the philosophy around capital maintenance. The result of this amendment is that a company is allowed to buy back its own shares and finance the backbuying of its shares under certain circumstances. A sample of 140 companies listed on the Johannesburg Securities Exchange for the period 2000 to 2005 was selected. The backbuying of shares by the relevant company, subsidiary and trust was analysed for the period 2000 to 2005. For the purposes of this empirical study, the financial sector, as well as the alternative exchange, that is focussed on good quality small and medium-sized high growth companies, were excluded during sample selection. The outcome of this exploratory study is the identification of the fact that a share buyback took place or not in Tables 4.1 and 4.2; a summary of the number of shares bought back in Table 4.3; and, in Table 4.4, a summary of the number of shares bought back, expressed as a percentage of the weighted average number of shares in issue.
AFRIKAANSE OPSOMMING: Maatskappye in Suid-Afrika was voor 30 Junie 1999 deur die Maatskappywet verbied om hul eie aandele terug te koop. Wysigings aan die Maatskappywet, naamlik die Wysigingswet op Maatskappye (wet 37 van 1999) het ’n radikale verandering bewerkstellig in die filosofie rakende kapitaalinstandhouding. Die gevolg van dié wysigingswetgewing is dat maatskappye sedert 30 Junie 1999 hul eie aandele kan terugkoop en in sekere omstandighede die aankoop van hul eie aandele finansier. ’n Steekproef van 140 genoteerde maatskappye op die Johannesburgse Aandelebeurs is geselekteer vir die tydperk 2000 tot 2005. Die terugkooptransaksies van aandele deur die betrokke maatskappy, filiaal en trust is opgesom vir die tydperk 2000 tot 2005. Hierdie empiriese ondersoek het die finansiële sektor, asook die alternatiewe beurs van die Johannesburgse Aandelebeurs, wat fokus op goeie kwaliteit klein en mediumgrootte maatskappye met groot groeipotensiaal, tydens die steekproefseleksie uitgesluit. Die resultate van hierdie empiriese ondersoek is die identifisering en opsomming van die terugkooptransaksies van aandele vir die steekproef in Tabelle 4.1 en 4.2; ’n opsomming in Tabel 4.3 van die getal aandele teruggekoop; en ’n opsomming in Tabel 4.4 van die getal aandele teruggekoop, uitgedruk as ’n persentasie van die gemiddelde getal uitgereikte aandele.
da, Costa Joel. "Online Non-linear Prediction of Financial Time Series Patterns." Master's thesis, Faculty of Science, 2020. http://hdl.handle.net/11427/32221.
Full textLiu, Xiaohui. "Web-Based Multi-Criteria Evaluation of Spatial Trade-Offs between Enivironmental and Economic Implications from Hydraulic Fracturing in a Shale Gas Region in Ohio." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1402969071.
Full textAcar, Esra. "Efficient index structures for video databases." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609322/index.pdf.
Full textHavránek, Dalibor. "Fundamentální analýza vybraných akcií na českém kapitálovém trhu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2009. http://www.nusl.cz/ntk/nusl-222013.
Full textSousa, Júnior Gabriel Faria de. "Active versus passive management : the case of BOVESPA." Master's thesis, Instituto Superior de Economia e Gestão, 2016. http://hdl.handle.net/10400.5/11647.
Full textO principal objetivo deste trabalho é analisar alguns modelos subjacente à gestão de carteiras ativa e passiva e qual seria seu impacto sobre a escolha de uma determinada carteira constituída por ações que estão integrados no índice BOVESPA, maior mercado bolsista do Brasil. A gestão passiva é baseada numa carteira que visa replicar o comportamento do Índice BOVESPA, tendo como base os preços históricos do índice e no método naïve (1/N), no qual composição da carteira inclui todos os ativos do índice com as mesmas proporções. A gestão ativa baseia-se no método de Markowitz, conhecido como modelo de média variância, que visa maximizar o retorno tendo definido um determinado nível de risco, ou minimizar o risco tendo em conta um nível de retorno esperado. Também é usado o método da variância mínima que consiste em minimizar o risco independentemente do retorno. Nesta abordagem as proporções a investir em cada ativo são revistas mensalmente tendo em conta a evolução do mercado. Outro modelo utilizado será um método ajustado da média variância em que serão mantidos os pesos ótimos do primeiro período para as restantes janelas de dados. Para as determinar são consideradas "janelas" de dados de 1 e 2 anos. É considerado um horizonte de investimento de 10 anos, a partir de Janeiro de 2005 a Dezembro de 2014. Com base nos resultados é possível afirmar que a carteira de média variância deve ser a escolhida, uma vez que apresenta os melhores resultados.
The main purpose of this paper is to analyze some models underlying the active and passive portfolio management and what would be its impact on the choice of a portfolio composed by stocks which are integrated in BOVESPA Index, Brazilian biggest stock market. The passive management approach is based on the historical prices of BOVESPA Index which replicates the behavior of the market and on the naïve method (1/N), in which the portfolio includes all the stocks on the index with the same proportions. Active management is based on the Markowitz model, also known as mean variance model, whose objective is to maximize the return give a set risk level or, minimize the risk given an expected return. The minimum variance model is also used, whose goal is to minimize the risk independent of the return. On these approach the weights of each asset in the portfolio are revised monthly, based on the market evolution. Another model used is a Mean Variance adjusted method in which the first period optimal weights will be maintained for the remaining data windows. In order for these to be determined, "windows" of 1 and 2 years were used. We are considering a 10 year investment horizon, from January 2005 to December 2014. Based on the results, we can affirm that the mean variance portfolio should be chosen, as performed better both in terms of returns and, especially, in terms of Sharpe ratio when compared with the other two portfolios.
Pontabry, Julien. "Construction d'atlas en IRM de diffusion : application à l'étude de la maturation cérébrale." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD039/document.
Full textDiffusion weighted MRI (dMRI) is an in vivo imaging modality which raises a great interest in the neuro-imaging community. The intra-structural information of cerebral tissues is provided in addition to the morphological information from structural MRI (sMRI). These imaging modalities bring a new path for population studies, especially for the study in utero of the normal humanbrain maturation. The modeling and the characterization of rapid changes in the brain maturation is an actual challenge. For these purposes, this thesis memoir present a complete processing pipeline from the spatio-temporal modeling of the population to the changes analyze against the time. The contributions are about three points. First, the use of high order diffusion models within a particle filtering framework allows to extract more relevant descriptors of the fetal brain, which are then used for image registration. Then, a non-parametric regression technique was used to model the temporal mean evolution of the fetal brain without enforce a prior knowledge. Finally, the shape changes are highlighted using features extraction and selection methods
Geller, Josephine Amanda Caroline. "Body shape and weight as determinants of women’s self-esteem." Thesis, 1996. http://hdl.handle.net/2429/4831.
Full textMorrison, Kristen Rahbar. "Women's Eating, Weight, and Shape Concerns and the Couple Relationship during the Transition to Parenthood." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-7079.
Full textFirmansyah, Rifdan, and 範銳撫. "Development of Computer Vision System to Determine Maturity, Weight, and Shape of Tai-Farm No. 2 Papaya (Carica papaya L.)." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/66767415043872566606.
Full text國立屏東科技大學
熱帶農業暨國際合作系
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Papaya (Carica papaya L.) is commonly graded by the maturity, weight and shape. Computer vision system has proven to be successful for objective measurement of various fruit crops. There were 60 papayas from one cultivar and 1,680 data points collected to be analyzed from visually classified fruits at harvest in seven ripening stages according to the Taiwan’s standard. The image processing has been used to determine color and extract shape features and assess the quality of papaya. MATLAB programming was used to extract the color and shape features by expressing colors in CIE L*a*b* color space, which are mathematically combined to calculate color index and extracting shape descriptors to determine weight and shape. The relationship between color index and total soluble solid (TSS) were determined. Determination of weight was estimated by spatial geometry analysis of ellipsoid volume estimation. The results showed that color index and TSS had a strong relationship with R2 of 0.97 within sigmoid function regression, while the weight estimation was highly determined with R2 of 0.971 (linier regression) and determination of papaya shape determined by shape index and elongation.
Lopes, Jessica Filipa Batista. "Weight and body shape dissatisfaction and eating psychopathology: the buffering effect of self-compassion in women with secure and insecure attachment styles." Master's thesis, 2015. http://hdl.handle.net/10316/31159.
Full textAttachment style has been linked in literature to eating psychopathology and to self-compassion and research has proposed self-compassion as a possible protective factor against eating psychopathology. The present study explores the association between attachment style, self-compassion and eating psychopathology severity and examines the moderator effect of self-compassion, in both securely and insecurely attached women, on the relationship between weight and body dissatisfaction and eating psychopathology. Participants in this study were women who were assessed using self-report instruments measuring attachment style, weight and body shape dissatisfaction and eating psychopathology (EDE-Q). Self-compassion was negatively correlated to weight and body shape dissatisfaction and eating psychopathology in both groups, and had a moderator effect on the relationship between weight and body shape dissatisfaction and eating psychopathology severity in the insecure attachment group. This is the first study to explore the differential buffering effect of self-compassion against the impact of weight and body shape dissatisfaction on eating psychopathology severity, when considering attachment style, with pertinent research and clinical implications.
O estilo de vinculação tem sido relacionado na literatura à psicopatologia alimentar e à autocompaixão e a investigação sugere a autocompaixão como um possível fator protetor contra a psicopatologia alimentar. O estudo presente explora a associação entre estilo de vinculação, autocompaixão e a severidade da psicopatologia alimentar e examina o efeito moderador da autocompaixão, em ambas mulheres com vinculação segura e insegura, na relação entre a insatisfação com o peso e forma corporal e a psicopatologia alimentar. Os participantes neste estudo foram mulheres que foram avaliadas usando instrumentos de autorresposta que medem o estilo de vinculação, a insatisfação com o peso e forma e a psicopatologia alimentar (EDE-Q). A autocompaixão correlacionou-se negativamente com a insatisfação com o peso e forma corpora, assim como com a psicopatologia alimentar em ambos os grupos, e teve um efeito moderador na relação entre a insatisfação com o peso e com a forma e a severidade da psicopatologia alimentar no grupo de vinculação insegura. Este foi o primeiro estudo a explorar o efeito de buffering da autocompaixão contra o impacte da insatisfação com o peso e forma na severidade da psicopatologia alimentar, quando considerando o estilo de vinculação, com implicações pertinentes para a investigação e para a prática clínica.