Dissertations / Theses on the topic 'C-PSW'
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Goulart, Dickson C. "J/PSI production via chi sub C decays in fixed target proton-nucleus collisions." Cincinnati, Ohio University of Cincinnati, 2004. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1100189506.
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Ditsche, Jochen. "Pseudodifferential analysis in Y*-algebras [psi*-algebras] on transmission spaces, infinite solving ideal chains and K-theory for conformally compact spaces." Aachen Shaker, 2008. http://d-nb.info/988688409/04.
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Bellaiche, Frédéric. "Sections efficaces de production des résonances j/psi psi' et du processus Drell-Yan dans les intéractions Pb-Pb a 158 GeV/c par nucléon." Phd thesis, Université Claude Bernard - Lyon I, 1997. http://tel.archives-ouvertes.fr/tel-00001397.
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Dans le cadre de la recherche expérimentale de la formation du plasma de quarks et de gluons dans les interactions entre ions lourds ultrarelativistes, les données obtenues par la collaboration NA50 auprès du SPS au CERN sont analysées. La cible segmentée utilisée par l'expérience NA50 est décrite et analysée en termes d'efficacité d'identification du vertex et de reconnaissance de réinteractions. Les sections efficaces de production des charmonia J/Psi, Psi' (via leur désintégration en paires de muons) et du processus Drell-Yan dans les interactions Pb-Pb à 158 GeV/c par nucléon sont mesurées. La dépendance en énergie transverse E_T des taux de production du J/Psi et du processus Drell-Yan est extraite. La comparaison des sections efficaces extraites avec celles mesurées pour des systèmes plus légers et la comparaison de la dépendance en E_T de la section efficace de production du J/Psi avec les prédictions théoriques issues du modèle de Glauber montrent l'existence d'une suppression anormale du taux de production du J/Psi qui dépend de la centralité des collisions. Cette suppression anormale est mise en rapport avec les modèles théoriques proposés par différents auteurs, décrivant la formation et l'interaction des états liés du charmonium dans un milieu déconfiné ou non déconfiné.
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Dekmouche, Abdelkader. "Désintégration du J/psi en mésons pseudoscalaires et vectoriels associés à une paire pp̄ auprès de D. C. I. D'Orsay : recherche du eta ::(C)." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21066.
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Milovich, F. O., N. Y. Tabachkova, V. T. Bublik, E. E. Lomonova, M. A. Borik, A. V. Kulebyakin, and V. A. Myzina. "Study of the Structure and Mechanical Properties of PSZ (Partially Stabilized Zirconia) after Heat Treatment at 1600 ˚C." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35406.
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The phase composition and twin structure of PSZ crystals after heat treatment at 1600 ˚C have been studied in relation to the content of the stabilizing impurity (Y2O3) by X-ray diffraction and transmission electron microscopy. The measurement of both hardness and fracture toughness by microindentation has been carried out. Studies have shown that crystals of PSZ obtained by directional solidification of the melt consist of two tetragonal phases (t and t’), with varying degrees of tetragonality. The yttrium-enriched phase t’ is ‘‘untransformable’’ in contrast to the t phase, with a lower content of yttrium, which, under the influence of mechanical stress, undergoes a martensitic transition to the monoclinic form. Increasing the stabilizing impurity concentration leads to an increase in the volume fraction of the ‘‘untransformable’’ phase. Increasing the concentration of Y2O3 also affects the form and dispersion of the twin domains. In this work it is shown that the quantity of hardening (fracture toughness) is proportional to the content of the transformable t phase. This work was supported by grants from the company "OPTEC"
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35406
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Charlot, Claude. "Etude de la production du j/psi dans les interactions oxygene-uranium a 200 gev/c par nucleon." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13113.
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Charlot, Claude. "Etude de la production du J/PSI dans les interactions oxygène-uranium à 200 GeV/c par nucléon." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612536f.
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Chebil, Latifa. "Acylation des flavonoides par les llipases de Candida antarctica et Pseudomonas cepacia : études cinétique, structurale et conformationnelle." Thesis, Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL097N/document.
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Ce travail a pour objectif d'étudier les perfomances et la régiosélectivité de deux lipases lors de l'acylation de flavonoïdes en milieu organique. Cette étude a permis de montrer que la solubilité dans l'acétonitrile, l'acétone et le tert-amyl alcool dépend de la nature du flavonoïde. La solubilité la plus élevée a été obtenue avec la naringénine et l'hepéritine et la plus faible pour la rutine et l'isoquercitrine. Les propriétés thermophysiques sont également affectées par la nature du flavonoïde. Ainsi, les flavonoïdes glycosylés possèdent un point de fusion moins élevé et une enthalpie de fusion plus élevée que ceux des aglycones. Du point de vue cinétique d'acylation, des rendements de conversion de 99% ont été obtenus avec la quercétine. Ces rendements varient en fonction de la nature du flavonoïde et du donneur d'acyle, du rapport molaire (vinyle acétate/ flavonoïde) et de la nature du solvant. Le rendement le plus faible a été obtenu avec l'hespéritine. La modélisation moléculaire de flavonoïdes dans le vide et dans des solvants a permis d'étudier le rôle de la conformation sur la solubilité et de dégager des relations structure-activité pour un certain nombre de descripteurs moléculaires. Enfin des modèles OPLS tout atomes ont été construits pour étudier par dynamique moléculaire la quercétine dans des phases condensées de solvants organiquesThis work aims to study the performances and the regioselcetivity of two lipases throughout the acylation of flavonoids in organic medium. This study showed that the solubility in acetonitrile, acetone and tert-amyl alcohol depends on the nature of the flavonoid. The highest solubility, in actonitrile, was obtained with the naringenin and hesperitin and the lowest with rutin and isoquercitrin. The thermophysical properties are also affected by the nature of flavonoids. Thus glycosylated flavonoids are characterized by a low melting point and a high enthalpy of fusion compared to the aglycon ones. From the kinetic acylation data, the highest conversion yields of 99% were obtained with quercetin. These conversion yields vary according to the nature of the flavonoid and the acyl donor, the molar ratio (vinyl acetate/flavonoid) and the nature of the solvent. The lowest conversion yield was obtained with hesperitin. Molecular modeling of flavonoids in vacuum and solvents allows to study the role of conformation structure on solubility and to release the structure-activity relationship with many electronic descriptors. Finally, OPLS all atoms were built to study, by molecular dynamics, quercetin in condensed phases of organic solvents
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Correa, Rejane Izabel Lima. "Domínios de Dirichlet e de Ford de subgrupos cíclicos de PSL(2,C) agindo na fronteira do espaço hiperbólico tridimensional." Universidade Federal de Minas Gerais, 2010. http://hdl.handle.net/1843/EABA-89WSCS.
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Let be a cyclic subgroup of PSL(2; ) generated by an element loxodromic. The fundamental domain of Ford and Dirichlet for the action of in H^3 are complementary to a configuration of semi-spheres centered at =H3. Jorgensen showed that the boundary of the intersection of the fundamental domain of Ford with H3 always has two, four or six sides formed by circular arcs. In this work we are interested in extending the result shown by Jorgensen for the Dirichlet fundamental domain. Analyze the fundamental domain for Ford and Dirichlet, and demonstrate some combinatorial properties of these domain that will demonstrate that their intersections with H3 always have two, four or six sides.Seja um subgrupo cíclico de PSL(2; ) gerado por um elemento loxodrômico. Os domínios fundamentais de Ford e de Dirichlet para a ação de em H3 são os complementares de uma configuração de semi-esferas centradas em = H3. Jorgensen demonstrou que a fronteira da interseção do domínio fundamental de Ford com H3 sempre possui dois, quatro ou seis lados formados por arcos circulares. Neste trabalho estaremos interessados em expandir o resultado demonstrado por Jorgensen para o domínio fundamental de Dirichlet. Analisaremos os domínios fundamentais de Ford e Dirichlet, e demonstraremos algumas propriedades combinatoriais destes domínios que permitirão demonstrar que suas interseções com H3 sempre possuem dois, quatro ou seis lados.
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WADHWA, MANEESH. "Etude de la production de j-psi et chi-c dans les desintegrations du z avec le detecteur l3 au lep." Chambéry, 1993. http://www.theses.fr/1993CHAMS008.
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Ce travail a pour but l'etude de la production de j/psi et de chi-c dans les desintegrations du z avec le detecteur l3 du lep. Les differents mecanismes de production du j/psi et du chi-c de ces modes rares de desintegration du z sont decrits. Nous insistons sur le mecanisme predominant: zb bbar, b(ou bbar)j/psi+x ou b(ou bbar)chi-c+x. Une description rapide du lep et du detecteur de l'experience l3 est ensuite donnee. Nous mettons l'accent sur l'excellente detection des electrons, muons et photons du detecteur l3, qui est mise a profit dans l'etude de ces 2 modes rares. Le j/psi est etudie dans les modes de desintegration j/psimumu et j/psie+e. La selection des muons et des electrons est decrite. Le spectre en masse invariante des dimuons (des dielectrons) montre clairement un pic de 94+/12 evenements (34+/7 evenements) a la masse du j/psi. On en deduit les rapports de branchement suivants: br(zj/psi+x)=(3. 9+/0. 6+/0. 4)103 pour les muons et br(zj/psi+x)=(3. 1+/0. 7+/0. 4)103 pour les electrons. En combinant ces 2 mesures on determine: br(bj/psi+x)=(1. 16+/0. 16+/0. 14)%. Le chi-c est recherche dans le mode chi-cj/psi+x, j/psimu+mu. La calibration des photons a basse energie (egamma<3 gev) et la selection des photons associes au j/psi est decrite. Le spectre de la difference de la masse invariante du systeme j/psi, gamma et de la masse invariante j/psi montre un pic de 19+/7 evenements que nous attribuons a la production de chi-c. C'est la premiere fois que ce mode est observe au lep. En supposant que seul le chi-cl est produit, nous determinons les br(zchi-cl+x)=7. 5+/2. 9+/0. 6)10##3 et br(bchi-cl+x)=(2. 4+/0. 9+/0. 2)10##2
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Goulart, Dickson C. "J/Ψ Production Via χc Decays in Fixed Target Proton-nucleus Collisions." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1100189506.
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Gustafsson, Johan. "Reliability analysis of safety-related digital instrumentation and control in a nuclear power plant." Thesis, KTH, Filosofi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-107186.
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There is so far no consensus on how to develop a reliability model of safety-related digitalinstrumentation and control (I&C) in a probabilistic safety assessment (PSA) of a nuclear powerplant. The objective of this thesis is to evaluate different approaches to model digital protectionsystems in a PSA for a nuclear power plant. This is accomplished by the development of a fault treemodel of the digital protection system for a fictive and simplified nuclear power plant, that act as areference model to be used for evaluation of different design alternatives and modelling principles.Common cause failures and spurious actuation signals are the major contributors to scenariosresulting in a core damage. A PSA model has to be sufficiently detailed in order for this to berepresented in the results. The impact on results such as core damage frequency and importance ofminimal cut sets from different fail-safe, voting logic and signal validation designs are significant,too. To further examine the differences between I&C designs and significance of different PSAmodelling solutions, the degree of realism of the example should be increased. This rapidlyintroduces complexity to the models resulting in a model that is more difficult to review and resultsthat is more difficult to interpret and even much simplified models tend to get rather complex.
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Guimar?es, Greyce Gondim. "Aten??o precoce do c?ncer de mama :um olhar sobre o cotidiano institucional de uma unidade de sa?de de Natal." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17527.
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Previous issue date: 2006-10-27Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Breast cancer has been considered a grave global public health problem due to its increase in incidence, in women s mortality and in the amount of financial resources spent on the therapeutic interventions used in the treatment of this neoplasia. However, this scenario presents some variations. In developing countries, the incidence of breast cancer is increasing but, on the other hand, the mortality is declining among patients because of public health actions toward early diagnostic that also result in cure of patients and decreasing levels of physical and psychosocial stress. In Brazil, we face of both the increasing number of breast cancer incidence and number of mortalities. Almost always the reason for that is a delayed detection that will provide a late diagnostic. The early detection of breast cancer has been studied in several researches. Some of them are concerned with women s experiences. Despite that, there is a lack of researches on dynamic comprehension of early attention to breast cancer from the health professionals points of view. The present research was carried out at the Unidade Mista de Felipe Camar?o (UMFC) and it was conducted with 11 professionals who work in the Family Health Program (PSF). The aim was to understand how early diagnostic and attention to breast cancer is being planned, discussed and accomplished by health professionals in their day-to-day actions. Semi-structure interviews were held individually with each professional, in a way that they could feel free to express their ideas about several issues. All the information from these interviews was analyzed and discussed using an Institutional Ethnographic approach. It was observed that the actions of health professionals working with early detection of breast cancer does not take place in a vacuum; they occur within institutional, relational and social ways. This interdependence influences their actions and points of view on the theme
O c?ncer de mama ? considerado um grave problema de sa?de p?blica mundial em decorr?ncia do aumento da sua incid?ncia, da mortalidade de mulheres e das grandes somas dispensadas para equacionar as interven??es terap?uticas empregadas a esta neoplasia. Entretanto, este panorama apresenta varia??es. Em pa?ses desenvolvidos h? o aumento da sua incid?ncia, entretanto h? a redu??o da sua mortalidade, sobretudo, pelo direcionamento das a??es de sa?de ? sua aten??o precoce, implicando na cura da grande maioria dos casos e na diminui??o dos impactos f?sicos e psicossociais. No Brasil, nos deparamos com a eleva??o tanto de sua incid?ncia quanto de sua mortalidade, em virtude, muitas vezes, do retardamento na sua detec??o o que ocasionar? o seu diagn?stico tardio. V?rios estudos t?m sido realizados abordando a tem?tica supracitada e muitos destes est?o direcionados ?s experi?ncias das mulheres. Contudo, percebeu-se a car?ncia de pesquisas relacionadas ? compreens?o da din?mica da aten??o precoce do c?ncer de mama a partir do olhar dos profissionais de sa?de. A presente pesquisa foi realizada na Unidade Mista de Felipe Camar?o (UMFC) com 11 profissionais das equipes do Programa de Sa?de da Fam?lia (PSF). Objetivou-se compreender como a tem?tica da aten??o precoce estava sendo articulada, discutida e realizada nas a??es cotidianas dos profissionais dessa institui??o. Foram realizadas entrevistas semiestruturadas e a an?lise e discuss?o das informa??es obtidas foi empreendida sob a perspectiva da abordagem da Etnografia Institucional. Observou-se que as a??es dos profissionais voltadas ? aten??o precoce do c?ncer de mama n?o acontecem em um vazio, mas s?o constru?das social, institucional e relacionalmente e essa interdepend?ncia acaba influenciando suas a??es e posicionamentos em rela??o ? tem?tica desta investiga??o
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Silva, Joana Raquel Faria da. "" Perfil Transcriptómico e Genético do Cancro da Próstata: Avaliação da Expressão dos genes PSA, PCA3, AMACR, TFF3, SERPINB5, GOLM1 e ERG e do Polimorfismo NBN-8360G>C no desenvolvimento da Doença "." Master's thesis, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/45830.
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Silva, Joana Raquel Faria da. "" Perfil Transcriptómico e Genético do Cancro da Próstata: Avaliação da Expressão dos genes PSA, PCA3, AMACR, TFF3, SERPINB5, GOLM1 e ERG e do Polimorfismo NBN-8360G>C no desenvolvimento da Doença "." Dissertação, Instituto de Ciências Biomédicas Abel Salazar, 2009. http://hdl.handle.net/10216/45830.
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Staley, Florent. "Etude de la production du continuum entre 2. 1 et 2. 7 gev/c**(2) et du j/psi dans les collisions **(32)s+**(238)u donne muon muon + x a 200 gev par nucleon." Chambéry, 1989. http://www.theses.fr/1989CHAMS002.
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Samuels, Emile Rasheed. "Calcium²§+-PS-dependent protein kinase C activity in fetal, neonate and adult rabbit lung and the release of surfactant-related material from isolated fetal rabbit type II alveolar cells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23487.pdf.
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Chapsal, L. "Evaluation de la production du J/psi, rapportée aux événements de biais minimum, dans les collisions In-In à 158 GeV/c par nucléon en fonction de la centralité de la réaction mesurée avec le télescope à vertex de l'expérience NA60." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00519891.
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La théorie prévoit, qu'aux premiers instants de l'univers, la matière a pu existersous la forme d'un plasma de quarks et de gluons (QGP). Les collisions d'ions lourds à des énergies ultra-relativistes sont utilisées pour recréer cet état déconfiné de la matière. L'expérience NA50 au CERN a mis en évidence, entre autres, l'existence d'une suppression anormale du J/psi dans sa désintégration dimuon pour les collisions les plus centrales du système Pb-Pb. La collaboration NA60 a permis, avec une précision accrue, d'améliorer et de compléter les résultats de NA50. Pour cela, le groupe NA60 a ajouté un spectromètre à ≪ pixels ≫ en amont de l'absorbeur de l'expérience NA50. L'un des résultats les plus remarquables de cette expérience a été de montrer que l'excès de dimuons observé aux masses intermédiaires était dû à des dimuons directs, ce qui pourrait être la première mise en évidence de dimuons thermiques. Le travail de ce manuscrit s'inscrit sur l'expérience NA60 pour les collisions In-In à 158 Gev/c par nucléon et porte sur la production de la résonance J/psi en fonction de la centralité. Après corrections des effets d'acceptance et d'efficacité, la centralité est déduite de la multiplicité des traces en utilisant le code de simulation VENUS. La production du J/psi est normalisée aux événements de biais minimum qui sontinsensibles à la production d'un QGP. Les résultats indiquent que la production du J/psi dans les collisions In-In est compatible avec l'absorption nucléaire de section efficace σ= 4.18 ± 0.35mb et qu'il n'y a donc pas de suppression anormale et ceci quelque soit la centralité de la collision. Cette étude n'a porté que sur une partie des données In-In, la statistique complète doit permettre d'affiner et de confirmer ce résultat.
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Čermák, Josef. "Modelování rušení pro xDSL." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217281.
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This work is focused on the subject of the interference modelling for xDSL technologies. First, the xDSL technologies are explained. Following is the presentation and description of the different kinds of the xDSL technologies. The next part deals with the basic parameters of metallic cable lines – especially the primary and secondary parameters. Nowadays wider bandwidths are used for the achievement of higher data transmission rates. During a higher frequency signal transmission a more intensive line attenuation appears. To identify the transfer characteristics of the lines while using an xDSL system, mathematic models of transmission lines are applied. That is why these mathematic models are dealt with in the next chapter. At the end of this section the mathematic models are compared using the modular and phase characteristics. The main aim of the work is to describe the different impacts which influence the efficiency of the xDSL systems. First, the causes interfering from the inside of the cable are deeply explained: Near End Crosstalk (NEXT), Far End Crosstalk (FEXT), Additive White Gaussian Noise (AWGN). Following is the explanation of the external interfering impacts: Radio Frequency Interference (RFI) and Impulse Noise. The next goal of this thesis is a design of a workstation for the tests of spectral features and the efficiency of the xDSL systems. The work also presents a designed GUI application and its description. The GUI application is an instrument for the choice or data entry of the final interference. The last chapter describes a realization of a measurement and shows the measured characteristics which were recorded on the ADSL tester and oscilloscope.
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Parameswaran, Sreeja. "Solar Energy Conversion in Plants and Bacteria Studied Using FTIR Difference Spectroscopy and Quantum Chemical Computational Methodologies." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/phy_astr_diss/32.
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This dissertation presents a study of the molecular mechanism underlying the highly efficient solar energy conversion processes that occur in the Photosystem I (PS I) reaction centers in plants and bacteria. The primary electron donor P700 is at the heart of solar energy conversion process in PS I and the aim is to obtain a better understanding of the electronic and structural organization of P700 in the ground and excited states. Static Fourier Transform Infra-Red (FTIR) difference spectroscopy (DS) in combination with site directed mutagenesis and Density Functional Theory (DFT) based vibrational frequency simulations were used to investigate how protein interactions such as histidine ligation and hydrogen bonding modulate this organization. (P700+-P700) FTIR DS at 77K were obtained from a series of mutants from the cyanobacterium Synechocystis sp. 6803 (S. 6803) where the amino acid residues near the C=O groups of the two chlorophylls of P700 where specifically changed. (P700+-P700) FTIR DS was also obtained for a set of mutants from C. reinhardtii where the axial ligand to A0-, the primary electron acceptor in PS I was modified. The FTIR DS obtained from these mutants provides information on the axial ligands, the hydrogen bonding status as well as the polarity of the environment of specific functional groups that are part of the chlorophyll molecules that constitute P700. Assignment of the FTIR bands to vibrational modes in specific types of environment is very difficult. In order to assist the assignment of the difference bands in experimental spectra DFT based vibrational mode frequency calculations were undertaken for Chl-a and Chl-a+ model molecular systems under different set of conditions; in the gas phase, in solvents using the Polarizable Continuum Model (PCM), in the presence of explicit solvent molecules using QM/MM methods, and in the presence of axial ligands and hydrogen bonds. DFT methods were also used to calculate the charge, spin and redox properties of Chl-a/Chl-a’ dimer models that are representative of P700, the primary electron donor in PS I.
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Larocque, Ronald. "L'espoir est dans les arbres : suivi de Le mythème de l'illumination : lumière dans les ténèbres." Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26529/26529.pdf.
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Senate, University of Arizona Faculty. "Faculty Senate Minutes May 7, 2012." University of Arizona Faculty Senate (Tucson, AZ), 2012. http://hdl.handle.net/10150/244391.
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Hunter, Brandon. "Channel Probing for an Indoor Wireless Communications Channel." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/64.
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The statistics of the amplitude, time and angle of arrival of multipaths in an indoor environment are all necessary components of multipath models used to simulate the performance of spatial diversity in receive antenna configurations. The model presented by Saleh and Valenzuela, was added to by Spencer et. al., and included all three of these parameters for a 7 GHz channel. A system was built to measure these multipath parameters at 2.4 GHz for multiple locations in an indoor environment. Another system was built to measure the angle of transmission for a 6 GHz channel. The addition of this parameter allows spatial diversity at the transmitter along with the receiver to be simulated. The process of going from raw measurement data to discrete arrivals and then to clustered arrivals is analyzed. Many possible errors associated with discrete arrival processing are discussed along with possible solutions. Four clustering methods are compared and their relative strengths and weaknesses are pointed out. The effects that errors in the clustering process have on parameter estimation and model performance are also simulated.
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Ivinza, Lepapa Alphonse C. "Analyse de l'introduction de l'EDI dans les entreprises congolaises: une contribution à l'impact organisationnel des TI." Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210598.
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RésuméLe cadre théorique de la contingence structurelle associe généralement « contexte, structure et performance » (Burns et Stalker, 1961; Woodward, 1965; Lawrence et Lorsch, 1967 ;Mintzberg, 1979).Le besoin de tester cette théorie dans l’environnement d’un pays sous développé (PSD) nous a conduit, dans cette recherche, à l’utilisation d’un cadre réduit basé uniquement sur des liens entre la technologie (remplacée par TI) et la structure (Galbraith, 1972 ;Lacrampe, 1974 ;Leifer, 1988).
Notre cadre théorique s’appuie sur les approches managériales, économiques et organisationnelles des TI et de l’EDI (Leavitt, 1968 ;Scott Morton, 1991). Il utilise la théorie contingente de la gestion comptable (Otley, 1980; Chapman, 1997) et des systèmes d’information comptable AIS (Sutton, 1995; Maudlin et Ruchala, 1999; Baldwin et alii, 2000; Dunk, 2001) comme domaine d’opérationnalisation (système d’information fonctionnel).
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Doctorat en Sciences économiques et de gestion
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Ren, Yan. "Genetic Engineering of Beta-Carotene Production in Honeydew Melons (Cucumis melo L. inodorus)." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10707.
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Genetic transformation is a useful tool to incorporate novel genes, potentially allowing sexual incompatibility and interspecific barriers to be circumvented. The purpose of this study was to improve beta-carotene levels in melon fruits by transferring a phytoene synthase (PSY) gene. At present, there are not sufficient regeneration and transformation studies reported on two commercially important melon types - western shipper cantaloupe and honeydew. To establish a high efficiency shoot regeneration system, we evaluated three types of explants in our elite breeding lines. A shoot tip with a hypocotyl and cotyledon fragments, regenerated shoots whereas a shoot tip with a hypocotyl without cotyledon, did not produce regenerants. Murashige & Skoog (MS) basal medium with 1 mg 1⁻¹ benzyladenine (BA), 0.26 mg 1⁻¹ abscisic acid (ABA) and 0.8 mg 1⁻¹ indole-3-acetic acid (IAA) was the best for regeneration from cotyledon explants in cantaloupe 'F39'. MS basal medium with 1 mg 1⁻¹ BA and 0.26 mg 1⁻¹ ABA was chosen for honeydew '150' to solve a curving-up problem of explants. Fifty to sixty percent of regenerants were found to be polyploids. To establish a reliable Agrobacterium-mediated transformation protocol, kanamycin sensitivity as well as Timentin[trademark] and Clavamox® were evaluated. Kanamycin 200 and 150 mg 1⁻¹ were chosen as the threshold levels for 'F39' and '150' respectively. No significant differences were found between Timentin[trademark] and Clavamox® in 'F39'; however, Clavamox® reduced the incidence of vitrification and increased the frequency of shoot elongation in '150'. A. tumefaciens strain EHA105, harboring pCNL56 carrying nptII and gusA genes, was used to establish a transformation protocol. The transformation efficiency was 0.3% from 'F39' and 0.5% from '150'. We introduced a watermelon PSY-C gene under the control of a fruit-specific promoter of a polygalacturonase gene into '150'. All the transgenic plants were tetraploids based on flow cytometry assays. Up to 32-fold of beta-carotene was elevated in the rind tissue of transgenic honeydew including phytoene increase. This is a very promising result for a further investigation to increase beta-carotene level in flesh tissue using the PSY-C gene with an appropriate promoter.
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Pei-Ken, Hsu. "Molecular and Genetic Analysis of C. elegans psr-1 in the Cell-Corpse Engulfment Process." 2005. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2607200511070400.
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Hsu, Pei-Ken, and 徐培根. "Molecular and Genetic Analysis of C. elegans psr-1 in the Cell-Corpse Engulfment Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56768854172728872363.
Full textAbstract:
碩士國立臺灣大學
分子與細胞生物學研究所
93
In multicellular organisms, the proper removal of apoptotic cell corpses prevents the possible dispersal of harmful cellular contents from dying cells. In C. elegans, PSR-1 is proposed to function as a receptor and act upstream of the pathway mediated by CED-2, CED-5, CED-10, and CED-12, possibly through physical interaction with CED-5 and CED-12 to control the engulfment process (Wang et al., 2003). We further mapped the binding region in PSR-1 for CED-5 and CED-12 interaction. To examine the expression pattern of PSR-1, we generated mouse and rabbit polyclonal antibodies against GST-PSR-1-IN fusion protein in order to test the subcellular localization of PSR-1. However, these antibodies and α-human PSR antibodies fail to recognize either bacterially-expressed GST-PSR-1-IN or endogenous or overexpressed PSR-1 in worm lysates. In addition to a transmembrane domain (TM), PSR-1 is predicted to possess two nuclear localization signals (NLSs). To test if any of these motifs is important for PSR-1 function, we performed deletion assays. We found that TM but not NLS is important for the engulfment function of PSR-1. These results support the previous hypothesis that PSR-1 functions on the cell membrane and possibly as a receptor to promote cell corpses uptake. In order to investigate the relationship between psr-1 and other possible engulfment genes, mer-1, unc-73, and mig-2, we analyzed the numbers of corpse in double and triple mutants. We showed that psr-1 and another engulfment receptor, mer-1, act in the same genetic pathway, and that there is no direct interaction between PSR-1 and MER-1 intracellular or extracellular domains. Besides, unc-73 and mig-2 may play minor roles and act in the same genetic pathway which does not involve psr-1 to control cell-corpse engulfment. Together our experiments suggested that PSR-1 may act as a membrane receptor to regulate cell-corpse engulfment and that it may function with MER-1 to achieve this process.
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Beck, Andreas [Verfasser]. "Die Beeinflussung des complexierten prostataspezifischen Antigens (c-PSA) durch mechanische und entzündliche Einflüsse / vorgelegt von Andreas Beck." 2008. http://d-nb.info/990217531/34.
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Kung, Li, and 龔俐. "An Approach of 1-Dimension PSO with Fuzzy C-means for the Optimal Combination of Energy Resources in a Recommender System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/94876413672375928356.
Full textAbstract:
碩士國立清華大學
工業工程與工程管理學系
104
Owing to the over-exploitation of fossil fuels, many governments and companies have been promoting renewable energy to resolve the limitation of fossil energy and environmental issues. Nevertheless, lacks of systematic analysis to provide useful information. A Recommender System is a popular approach to promote products in Electronic Commerce. Till now there is no research developed a recommender system for environmental protection. In addition, user-friendly interface of recommender system is still lacking. Therefore, this research aims to construct an enterprise-oriented web recommender system to cope with environmental issues. In order to identify the users, the system has proposed a modules of clustering analysis called one-dimension Particle Swarm Optimization with Fuzzy C-means. The proposed web recommender system has integrated data-module and model-module for electricity, renewable energy prediction and generation. Based on the forecasted electricity consumption, a case of National Tsing Hua University is provided as an enterprise with the recommendation of the best investment of renewable energy to illustrate and validate the system.
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Seppi, Santiago. "Uso de Interferometría diferencial para monitorear deformaciones de terreno en la Comuna de Corvala, provincia de Bolzano, Italia." Master's thesis, 2016. http://hdl.handle.net/11086/8938.
Full textAbstract:
Tesis. Presentado ante la Facultad de Matemática, Astronomía y Física y el Instituto de Altos Estudios Espaciales Mario Gulich como parte de los requerimientos para la obtención del grado de Magister en Aplicaciones Espaciales de Alerta y Respuesta Temprana a Emergencias. Universidad Nacional de Córdoba. Agosto de 2016.El deslizamiento de Corvara (Alpes Italianos) se encuentra activo desde hace más de 10.000 años. Campañas de monitoreo GPS en los últimos 15 años han revelado vectores de deformación de hasta 50 metros para solo un año (Caroli, 2009). Para ese trabajo el deslizamiento de Corvara se toma como caso de estudio para comparar diferentes Imágenes SAR y diferentes técnicas para medir deformaciones en el terreno, y para evaluar la factibilidad del procesado interferométrico (InSAR) en estas aplicaciones. Por un lado se prueba el algoritmo Permanent Scatterers (PS) con 27 imágenes Cosmo Skymed (banda X) en órbita descendente adquiridas sobre el área de estudio. La presencia en terreno de 16 Corner Reflectors artificiales, diseñados de acuerdo a la longitud de onda y la geometría de adquisición de las imágenes Cosmo Skymed, ha sido fundamental para la implementación de esta técnica en un ambiente en rápido movimiento y pobre en coherencia. Por otro lado se procesan dos conjuntos de 16 imágenes Sentinel-1A (banda C) en órbita ascendente y descendente con el algoritmo Small Baselines Subset (SBAS). Al aplicarse esta técnica resulta esencial lograr una combinación de pares interferométricos lo suficientemente coherente sin por ello tener que descartar grandes porciones de datos. Ambas familias de algoritmos se usan para generar series temporales de deformación y calcular parámetros como la velocidad de la deformación, la altura del terreno y el desplazamiento acumulado. En ese sentido los Corner Reflectors son también utilizados como verdad de campo para validar las series temporales derivadas de los tres conjuntos de datos. Se analizan características ambientales propias del área de estudio y parámetros de las adquisiciones tales como el tiempo cubierto por cada conjunto de datos, la magnitud de los movimientos identificados, la longitud de onda utilizada, y las posibles limitaciones de las dos técnicas para entender su performance en un ambiente de montaña en movimiento constante como Corvara.
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Lee, Ming-Chia, and 李敏嘉. "PSR-1 (Phosphatidylserine Receptor) and cMER (a receptor tyrosine kinase) potentially act together as receptors to transduce apoptotic signals during the cell-corpse engulfment in C. elegans." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/80778772302502527090.
Full textAbstract:
碩士國立臺灣大學
動物學研究所
90
Apoptosis, or programmed cell death, is considered as the most physiological mode of cell death, which is used to dispose the unwanted cells. In vivo, apoptotic cells are efficiently removed by professional or nonprofessional phagocytes, which is a process thought to be essential for tissue remodeling and the resolution of inflammation. In mammalian system, macrophage recognizes apoptotic cells by several mechanisms, including recognition of the exposed phosphatidylserine (PS). We suggest that psr, a highly conserved phosphotidylserine receptor, not only play a role in mammalian macrophage but also function in the cell corpse engulfment in C. elegans. Cell —specific expression of psr-1(C. elegans psr homologue) indicates that psr-1 functions in engulfing cell to control cell corpse engulfment. Heat shock bypass experiments suggest that psr-1 likely acts upstream of the conserved GTPase signaling pathway mediated by CED-2/CrkII, CED-5/Dock180, CED-10/Rac1 and CED-12/ELMO-1 to control the phagocytosis of cell corpses. Furthermore, we also showed that PSR could interact physically with CED-5 and CED-12 in vitro. In addition, we found that mer, a member of Axl/Mer/tryo3 receptor tyrosine kinase, is also important in the process of cell corpse engulfment based on the phenotype analysis of cmer (RNAi) mutants. Our genetic data showed that cmer (C. elegnas mer homologue) likely also acts upstream of ced-2, ced-5, ced-10 and ced-12. The experiments in combination with our double mutant analysis suggest that PSR-1 and cMER might act together to initiate the signaling mediated by CED-2/CrkII, CED-5/Dock180 and CED-12/ELMO-1 and results in activation CED-10/Rac-1, which in turn cause cell corpse engulfment through reorganization of cytoskeleten.
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Oliveira, Filipe Santos Costa. "Relatório de estágio pedagógico desenvolvido na Escola Secundária D. Duarte, junto do 3º PSI, do 3º ANIM e colaborando com o 10º C, no ano lectivo 2013-2014." Master's thesis, 2014. http://hdl.handle.net/10316/28140.
Full textAbstract:
Relatório de estágio do mestrado em Educação Física nos Ensinos Básico e Secundário, apresentado à Faculdade de Ciências do Desporto e Educação Física da Universidade de CoimbraNo segundo ano do Mestrado em Ensino da Educação Física nos Ensinos Básico e Secundário da Faculdade de Ciências do Desporto e Educação Física, Universidade de Coimbra, está previsto no plano de estudos a realização de um Estágio Pedagógico, o qual consiste num período de formação profissional onde o estagiário irá desenvolver as suas competências como docente, aplicando na prática os conhecimentos da sua formação académica neste ramo. O nosso Estágio Pedagógico decorreu na Escola Secundária D. Duarte, Coimbra, inicialmente junto da turma do terceiro ano do Curso Profissional de Técnico de Gestão e Programação de Sistemas Informáticos (3ºPSI), durante a Unidade Didáctica de Ténis junto da turma do décimo ano do Curso de Humanidades (10ºC), e ainda como professor de Expressão Corporal junto da turma do terceiro ano do Curso Profissional de Animador Sociocultural (3ºANIM). Este Estágio Pedagógico permitiu-nos ter uma vivência próxima à prática profissional de docente de Educação Física, complementando a nossa formação nesta área, promovendo a aquisição de novos saberes, práticos e mais específicos, que não podem ser adquiridos sem se passar pelo contacto directo com a comunidade escolar, com as turmas, os professores e os colegas de Estágio. Neste relatório apresentamos o balanço das actividades realizadas no Estágio Pedagógico, descrevemos e reflectimos sobre as várias situações pelas quais passámos e sobre os resultados das aprendizagens realizadas. O relatório irá ser desenvolvido em três partes, em que a primeira será essencialmente descritiva do contexto pedagógico em que o Estágio foi desenvolvido; a segunda consistirá numa reflexão crítica sobre as práticas pedagógicas realizadas; e, por fim, na terceira apresenta-se o aprofundamento do tema/problema seleccionado “A Demostração - Preferências dos alunos nas aulas de Educação Física relativas ao tipo de Demostração”, no qual se concluiu existir coincidência entre as opções do professor e as preferências manifestadas pelos alunos. Palavras-Chave: Estágio Pedagógico. Planeamento. Realização. Reflexão. Exercícios. Professor. Alunos. Processo ensino-aprendizagem. Intervenção Pedagógica. Demonstração. VII ABSTRACT In the second year of the Master’s Degree in Teaching of Physical Education in Basic and Secondary Education in Faculdade de Ciências de Desporto e Educação Física, in the University of Coimbra, is planned in the syllabus the realization of a teaching practice, which consists in a period of vocational training where the internal teacher will develop competences as a teaching position applying the knowledge of the academic training. Our teaching practice occurred in Secondary School “Escola Secundária D.Duarte”, Coimbra, initially with the third year class of “Curso Profissional de Técnico de Gestão e Programação de Sistemas Informáticos” (3ºPSI), with a class of the tenth grande of “Curso de Humanidades” (10ºC) as a Physical Education teacher, and still as a teacher of “Expressão Corporal” of the third year class of “Curso Profissional de Animador Sociocultural”. This teaching practice allowed us to have a close experience of a teaching position of Physical Education, completing our training in this area, promoting the acquisition of new knowledge, practical and more specific, that could not be acquired without experiencing direct contact with the schools community, with the classes, the teachers and the teaching practice colleagues. In this report we present the balance of the activities done in the teaching practice, we describe and reflect about the various situations that happened and about the results of studies undertaken. The report will be developed in three parts, where the first will be essentially descriptive of the educational context in which the teaching practice was developed; the second will consist of a critical reflection on the teaching practice carried out; and the third shows the deepening of the topic/issue selected “The Demonstration – Preferences of students in Physical Education classes regarding the type of demonstration” which concludes the existence of coincidences between the choices of the teacher and the preferences expressed by the students.
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Seppi, Santiago Ariel. "Uso de interferometría diferencial para monitorear deformaciones de terreno en la comuna de Corvara, provincia de Bolzano, Italia." Master's thesis, 2016. http://hdl.handle.net/11086/5804.
Full textAbstract:
Tesis (Magister en Aplicaciones Espaciales de Alerta y Respuesta Temprana a Emergencias)--Universidad Nacional de Córdoba, Facultad de Matemática, Astronomía, Física y Computación, 2016.Maestría conjunta con el Instituto de Altos Estudios Espaciales "Mario Gulich"-CONAE.
El deslizamiento de Corvara (Alpes Italianos) se encuentra activo desde hace más de 10.000 años. Campañas de monitoreo GPS en los últimos 15 años han revelado vectores de deformación de hasta 50 metros para solo un año (Caroli, 2009). Para ese trabajo el deslizamiento de Corvara se toma como caso de estudio para comparar diferentes imágenes SAR y diferentes técnicas para medir deformaciones en el terreno, y para evaluar la factibilidad del procesado interferométrico (InSAR) en estas aplicaciones. Por un lado se prueba el algoritmo Permanent Scatterers (PS) con 27 imágenes Cosmo Skymed en órbita descendente, y por el otro se procesan dos conjuntos de 16 imágenes Sentinel-1A (banda C) en órbita ascendente y descendente con el algoritmo Small Baselines Subset (SBAS).
The Corvara Landslide (Italian Alps) has been active for over 10,000 years, and systematic ground GPS monitoring within the last 15 years has revealed displacement vectors of up to 50 meters for only one year (Caroli, 2009). In this work the Corvara landslide is taken as case study in order to compare different spaceborne SAR images and techniques to retrieve ground deformation and to evaluate the feasibility of Inteferometry (InSAR) processing for these applications. On one side the Permanent Scatterers (PS) algorithm is used to process a set of 27 Cosmo Skymed images (X-band) in descending mode acquired over the study area. The presence of 16 artificial Corner Reflectors, designed according to Cosmo Skymed wavelength and acquisition geometry, has been crucial for the implementation of this technique in a rapidly moving and poorly coherent study area. On the other side two datasets of 16 Sentinel-1A images C-band) in ascending and descending mode are processed with the Small Baselines Subset (SBAS) algorithm, where achieving a coherent enough combination of interferometric pairs without discarding large portions of data becomes essential. Both families of algorithms are intended to generate deformation time series and to retrieve parameters such as deformation velocity, terrain height and cumulative displacement. The Corner Reflectors are also used as ground control points to validate the time series derived from the three datasets. Local environmental factors and sensor characteristics such as the monitored time period, magnitude of the measured movements, difficulties related to X and C band wavelengths and algorithms limitations are analyzed in order to understand the performance of these techniques in a mountainous landslide area like Corvara.
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Mousavi, S. M. H., Charles Vincent, and T. Gherman. "An evolutionary Pentagon Support Vector finder method." 2020. http://hdl.handle.net/10454/17671.
Full textAbstract:
YesIn dealing with big data, we need effective algorithms; effectiveness that depends, among others, on the ability to remove outliers from the data set, especially when dealing with classification problems. To this aim, support vector finder algorithms have been created to save just the most important data in the data pool. Nevertheless, existing classification algorithms, such as Fuzzy C-Means (FCM), suffer from the drawback of setting the initial cluster centers imprecisely. In this paper, we avoid existing shortcomings and aim to find and remove unnecessary data in order to speed up the final classification task without losing vital samples and without harming final accuracy; in this sense, we present a unique approach for finding support vectors, named evolutionary Pentagon Support Vector (PSV) finder method. The originality of the current research lies in using geometrical computations and evolutionary algorithms to make a more effective system, which has the advantage of higher accuracy on some data sets. The proposed method is subsequently tested with seven benchmark data sets and the results are compared to those obtained from performing classification on the original data (classification before and after PSV) under the same conditions. The testing returned promising results.
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Barán, Ezequiel. "Proteína C reactiva para el manejo de neumonías adquiridas de la comunidad." Tesis, 2008. http://hdl.handle.net/10915/5435.
Full textAbstract:
El objetivo del estudio fue determinar la utilidad de la proteína C reactiva (PCR) en el manejo de la neumonía adquirida de la comunidad (NAC). Se estudiaron de forma prospectiva 169 pacientes con diagnóstico de NAC. Se utilizó como criterio diagnóstico de la presencia de infiltrado en radiografía de tórax anteroposterior frente y perfil, más uno de los siguientes signos y/o síntomas: fiebre o hipotermia, rales crepitantes, tos productiva y hemocultivos o cultivo de esputo con gérmenes compatibles con el diagnóstico de NAC. La edad promedio fue de 70,96 años (rango 25-97 años). La distribución por sexo fue la siguiente femenino 52% y masculino 48%. La mortalidad observada fue 7,69 % (13/169). Se compararon dos scores de severidad de neumonía: PSI (Pneumonia Severity Index) y CURB-65 (Confusion, Urea, Respiratory Rate, Blood Preasure, Age > 65) con proteína C reactiva. Se establecieron cinco categorías de PCR: I menor a 29 mg/l, II entre 29 y 39 mg/l, III entre 40 y 59 mg/l, IV 60 y 75 mg/l y V mayores 76 mg/l. Se consideraron valores positivos mayores o iguales a 39 mg/l. Se encontró correlación entre CURB-65 y PSI y entre CURB-65 (en todas las clases de severidad) y PCR (P < 0,000), como así también entre PSI categoría IV y PCR (P < 0,007). Los valores de PCR poseen relación con respecto a la gravedad de la neumonía utilizando CURB65.
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Samuels, Emile Rasheed. "Calcium2S+-PS-dependent protein kinase C activity in fetal, neonate and adult rabbit lung and the release of surfactant-related material from isolated fetal rabbit type II alveolar cells." 1996. http://hdl.handle.net/1993/1025.
Full textAbstract:
The fetal lung secretes significant quantities of surfactant during late gestation in preparation for respiration which must begin immediately after birth. Although initiation of surfactant synthesis/secretion may be accelerated, the underlying mechanisms of the process itself remain to be resolved. An important pathway in adult lung has implicated the a$\sp{2+}$-PS-dependent enzyme protein kinase C (PKC) in its regulation. The present study was undertaken to characterize the activity of Ca$\sp{2+}$-PS-dependent PKC in adult lung and to determine if PKC was involved in the processes of initiation of synthesis and secretion of surfactant-related compounds in fetal and neonate lung. Protein and phospholipid levels, and activity profiles of Ca$\sp{2+}$-PS-dependent PKC were determined from subcellular fractions of fetal, neonate and adult rabbit lung. The enzyme's activity in the lamellar body fraction from whole lung and isolated type II cells was examined in greater detail. Additionally, the effect of PKC activation on uptake and release of phosphotidylcholine precursors $\lbrack\sp{32}$P) and $\lbrack\sp3$H) choline by isolated fetal type II pneumocytes was observed using the PKC activator tetradecanoylphorbol acetate (TPA). (Abstract shortened by UMI.)
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Marchão, Ricardo Portas. "Random vibration analysis design methodology applied on aircraft components - case study on a Lockheed Martin C-130H instrument panel retrofit." Master's thesis, 2016. http://hdl.handle.net/10362/22168.
Full textAbstract:
In the aeronautical industry, qualification and certification processes are very complex not only
because safety has to be ensured, but also because there is regulation that must be fulfilled.
This dissertation has its origin on the necessity of assisting a design certified company credited
as DOA (Design Organization Approval) in a preliminary phase of a modification project, and
fulfill the need of developing an analysis methodology at a preliminary design phase that allows
to produce confident results in a short time.
The modification in study consists in a flight instruments retrofit (upgrade) for Lockheed Martin
C-130 H aircraft series. One of the main concerns on the modified instrument panel is its level of
vibration.
Random vibration is recognized as the most realistic method of simulating the dynamic
environment of military applications. PSD (Power Spectral Density) is a statistical measure
defined as the limiting mean-square value of a random variable and it is used in random vibration
analyses in which the instantaneous magnitudes of the response can be specified only by
probability distribution functions that show the probability of the magnitude taking a certain
value.
The purpose of this work is a creation of an efficient methodology which is intended to provide
guidance for future possible projects of modification and fulfills the requirements of MIL-STD-
810G.
The design methodology was implemented in a case study: the Lockheed Martin C-130H
instrument panel retrofit (upgrade). Case study simulations were carried out through FEM (Finite
Element Method).
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Honda, Stacey A. A. "The implications of molecular diagnostics in clinicopathologic correlations in two disease processes PSA serum levels in acute illnesses and prevalence of activated protein C resistance and Factor V mutation in patients with thrombosis and in control patients by ethnic group /." 2002. http://wwwlib.umi.com/dissertations/fullcit/3057362.
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Κομηνέα, Αθηνά Π. "Ανοσοϊστοχημική μελέτη της έκφρασης και προγνωστικής σημασίας των υποδοχέων στεροειδών ορμονών (ER, PR, AR), των πρωτεϊνών θερμικού shock (ΗΣΠ27 και HSP70), της πρωτεΐνης PS2, του ογκογονιδίου C-ERBB-2 και του δείκτη κυτταρικού πολλαπλασιασμού Ki-67 σε αδενοκαρκινώματα του στομάχου." Thesis, 2005. http://nemertes.lis.upatras.gr/jspui/handle/10889/3311.
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António, André de Jesus Simba. "O efeito da taxa de juro no preço das ações em Portugal." Master's thesis, 2019. http://hdl.handle.net/10071/19256.
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O objetivo desse trabalho é analisar de forma empírica qual será o efeito que a taxa de juro
tem no preço das ações em particular das ações do PSI-Geral. Foi usada uma análise
econométrica para o período compreendido entre o primeiro trimestre de 2000 e o quarto
trimestre de 2018. Baseando-se na análise de regressão linear simples e múltipla,
estimaram-se duas equações. Na primeira estimação, utilizámos as ações do PSI-Geral
como a variável explicada e a taxa de juro como a variável explicativa. Os dados mostraram
que existe uma relação positiva entre a taxa de juro e ações do PSI-Geral. Na segunda
estimação, utilizaram-se cinco variáveis independentes (taxa de juro, PIB real, taxa de
inflação, saldo primário e dívida pública). Os resultados indicam que existe uma relação
positiva entre a taxa de juro e as ações do PSI-Geral.The objective of this paper is to analyze the empirical way what will be the effect of interest rates that have on particular share price of PSI-General shares. An economic analysis was used for the period from the first quarter of 2000 to the fourth of 2018. Based on the simple and researched linear regression analysis, calculate two equations. In the first request, used as PSI-General shares as explained variable and interest rate as explanatory variable. The data displayed that there is a positive relationship between the stock indices and PSI-General stocks. In the second application, use five independent variables (interest rate, real GDP, inflation rate, primary balance, and government debt). The results required that there is a positive relationship between interest rates and the shares of PSI-General.
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Bicho, Tiago Carvalho Filipe. "Efeitos assimétricos do ouro, do petróleo e das suas volatilidades no PSI-20." Master's thesis, 2020. http://hdl.handle.net/10071/21794.
Full textAbstract:
Esta investigação tem como objetivo estudar a reação do índice bolsista português PSI20
face aos preços do ouro e do crude. Foram aplicados dados de fecho diários num período entre
2008 e 2020. Para investigar estes dados recorreu-se ao estimador "nonlinear autoregressive
distributed lag" (NARDL) proposto por Shin et al., (2014), efetuando-se estimações de curto e
de longo-prazo, com o objetivo principal de verificar os efeitos assimétricos das variáveis de
estudo.
Neste estudo, ao aplicar o estimador NARDL conclui-se a existência de assimetrias de curto
e de longo-prazo do ouro e do crude face ao PSI-20. Podemos concluir tal como Baur & Lucey,
(2010) a presença de um comportamento de "safe-haven" por parte do ouro, ou seja, sempre que
existem movimentos ascendentes deste ativo o PSI20 irá depreciar-se e vice-versa.
Disponibiliza por outro lado as respetivas respostas do PSI-20 aos choques positivos e negativos
do ouro, crude e das suas volatilidades associadas através dos gráficos "dynamic multiplier". Foi
descoberto ainda que a cotação do ouro possui uma relação negativa e o crude uma relação
positiva para com o PSI-20 nos testes de longo-prazo. Foram também verificados impactos
assimétricos nos testes de curto-prazo.This investigation aims to study the reaction of the Portuguese stock index PSI-20 against gold and crude oil prices. Daily closing data were applied in a period between 2008 and 2020. To investigate these data, the nonlinear autoregressive distributed lag (NARDL) estimator proposed by Shin et al. (2014) was used, making short and long-term, with the main goal of verifying the asymmetric effects of the variables. In this study, when applying the NARDL estimator, the existence of short and long-term asymmetries of gold and crude oil compared to the PSI-20 is concluded. We can also conclude, like Baur & Lucey (2010) the presence of safe-haven behavior on the part of gold, that is, whenever there are upward movements in this asset, the PSI-20 will depreciate and vice-versa. On the other hand, it provides the respective responses of the PSI-20 to the positive and negative shocks of gold, crude oil and their associated volatilities through dynamic multiplier graphs. It was also discovered that the price of gold has a negative relationship and crude oil has a positive relationship with the PSI-20 in long-term tests. Asymmetric impacts were also verified in the short-term test.
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Batista, Diana Patrícia Correia. "CAPM: an application to the Portuguese companies in the retail sector." Master's thesis, 2019. http://hdl.handle.net/10071/19289.
Full textAbstract:
The objective of this study is to estimate the CAPM for the two Portuguese retail
companies listed in the PSI-20 (JMT and SON) and assess how the two of them evolve
regarding the Portuguese market index.
This study covered sixteen years (pre and post-subprime crisis) and, based on
estimation results, we established a comparison between the relation of each company
with the PSI-20. We also analysed the differences before and after the 2008 financial
crisis. For this purpose, the estimation of α and β coefficients was done by using the OLS
method, and the adequacy of the model was checked by verifying the statistical
significance of the regression coefficients and the fulfilment of the OLS assumptions.
Finally, the main conclusion is that the two companies tend to behave differently
concerning the Portuguese market index. All the beta estimates were statistically
significant, meaning that changes in the PSI-20 returns will influence the changes on each
company’s returns, which is in line with the CAPM. However, except for two periods for
JMT, the alpha estimates were statistically significant, meaning that there were additional
factors other than the market risk premium that explained the expected value of excess
returns. We could also note that the expected returns for JMT went from a negative value
(pre-crisis) to a positive value (post-crisis), while for SON there was a decline in the alpha
value.O objetivo deste estudo é estimar o CAPM para as duas empresas de distribuição portuguesas que estão listadas no PSI-20 (JMT e SON) e avaliarmos como é que elas evoluem em relação ao índice de mercado português. Este trabalho abrangeu um período de dezasseis anos (pré e pós-crise do subprime) e, com base nos resultados das estimativas, fizemos uma comparação entre a relação de cada empresa com o PSI-20. Posteriormente analisámos as diferenças entre o antes e o após da crise financeira de 2008. Para isso, estimámos os coeficientes α e β através do método OLS e a adequação do modelo foi verificada através da significância estatística dos coeficientes da regressão e do cumprimento das hipóteses do método. Por fim, a principal conclusão é que as duas empresas tendem a comportar-se de maneira diferente em relação ao índice de mercado português. Todas as estimativas do beta são estatisticamente significativas, o que significa que as mudanças na rendibilidade do PSI-20 influenciam as mudanças nos retornos de cada empresa, o que está alinhado com o CAPM. No entanto, com exceção de dois períodos para a JMT, as estimativas para o alfa são estatisticamente significativas, o que significa que, além do prémio de risco de mercado, há outros fatores que explicam o valor esperado dos retornos em excesso. Também pudemos observar que os retornos esperados para a JMT passaram de um valor negativo (pré-crise) para um valor positivo (pós-crise), enquanto para a SON houve um declínio no valor de alfa.
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Aldonsa, Tomaz Ravasco Rojão Ferreira. "Determinantes macroeconómicos do índice acionista PSI-20." Master's thesis, 2018. http://hdl.handle.net/10071/18704.
Full textAbstract:
Este trabalho tem como objetivo determinar de forma empírica, como é que os
determinantes macroeconómicos influenciam o índice acionista do PSI-20. Esta análise
econométrica de séries temporais é feita para o período compreendido entre o primeiro
trimestre de 2000 e o último trimestre de 2017. Considerando a literatura existente, foi
estimada uma equação para o índice PSI-20 usando o método econométrico ARDL. Esta
estimação utiliza oito variáveis independentes (PIB real, oferta monetária, brent, dívida
pública, Eurostoxx 50, taxa de inflação, taxa de câmbio efetiva e taxa de juro). Os
resultados indicam que o agregado monetário M3, o Eurostoxx 50, a taxa de inflação e a
taxa de câmbio efetiva têm um efeito positivo no índice PSI-20. As variáveis PIB, brent
e taxa de juro das OT’s a 10 anos exercem um efeito negativo no respetivo índice. A
dívida pública não exerce qualquer efeito no índice.This work aims to analyze, from an empirical point of view, how macroeconomic determinants influence the evolution of stock market index of PSI-20. This time series econometric analysis is performed for the period from the first quarter of 2000 and the last quarter of 2017. Taking into account the existing literature, we estimate an equation for the stock market index of PSI-20 using the ARDL econometric model. This estimation uses eight independent variables (real GDP, money supply, oil prices, public debt, Eurostoxx 50, inflation rate, effective exchange rate and interest rate). We conclude that money supply, Eurostoxx 50, inflation rate and effective exchange rate exert a positive impact on stock market index of PSI-20. GDP, oil prices and interest rate impact negatively in the respective stock market index. Public debt does not exert any effect on PSI-20.
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Schlicker, Michael. "Konzeption und Implementierung eines Informationssystems zur Effizienzsteigerung des Technischen Kundendienstes." Doctoral thesis, 2019. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201901301142.
Full textAbstract:
Die Dissertation hat zum Ziel, zum einen Beitrag zur wissenschaftlichen Diskussion in der Wirtschaftsinformatik hinsichtlich der Gestaltung von Informationssystemen zur Unterstützung des Technischen Kundendienstes (TKD) zu leisten. Zum anderen sollen die Ergebnisse bei Herstellern und Serviceorganisationen des Maschinen- und Anlagenbaus, der Fertigungsindustrie sowie bei Softwareherstellern als Grundlage zur Konzeption und Implementierung derartiger Informationssysteme dienen.
Die vorliegende Arbeit untersucht im Dachbeitrag (Teil A) zunächst komplementäre Lösungsansätze bzw. -zusammenhänge relevanter Wissenschaftsdisziplinen wie der Wirtschaftsinformatik, der Ingenieurwissenschaft, der Dienstleistungs- und Product-Service-Systems-Forschung sowie der Arbeitswissenschaft.
Unter Berücksichtigung aktueller methodischer Diskussionen der Wirtschaftsinformatik wird die Arbeit in das gestaltungsorientierte Paradigma eingeordnet, ergänzt um Elemente einer erklärungsorientierten Perspektive. Das Untersuchungsdesign orientiert sich an dem Ordnungsrahmen von Gregor und Jones. Allerdings wird im Unterschied zu Gregor und Jones der prototypischen Instanziierung ausgewählter Artefakte inklusive Evaluation eine hohe Bedeutung zugemessen und diese entsprechend in der Arbeit dargestellt. So entstehen unter Anwendung ausgewählter Methoden der Wirtschaftsinformatik praxisnahe Artefakte, welche die in der Arbeit adressierte Problemstellungen und Forschungsfragen adäquat diskutieren.
Im Ergebnisteil werden „Allgemeine Ergebnisse“ und „Spezifische Publikationsergebnisse“ differenziert. In den allgemeinen Ergebnissen erörtert die Arbeit zum einen die entstandenen Artefakte, zum anderen wird die wirtschaftliche Verwertung der Forschungsergebnisse skizziert. Diese Darstellung erfolgt anhand einer Unternehmensgründung, die im Anschluss an die Forschungsprojektphase vom Verfasser realisiert wurde. Die im Forschungszeitraum erarbeiteten und veröffentlichten Teilergebnisse aus dem Untersuchungskontext werden in den spezifischen Publikationsergebnissen zusammengefasst.