923 resultados para Equação diferencial


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El propósito del trabajo ha sido el de confirmar las siguientes hipótesis: 1) Los pacientes hospitalizados indicarán la ocurrencia de un menor número de estresores hospitalarios que los profesionales de enfermería. 2) La valoración del grado de estrés referido a los distintos acontecimientos ocurridos durante la hospitalización será significativamente menor en los pacientes que en el personal de enfermería. Para ello 66, pacientes hospitalizados y 66 profesionales de enfermería que atendían a los primeros cumplimentaron una adaptación de la escala de estresores hospitalarios de Volicer y Bohanon (1975), elaborada a propósito de este estudio, a partir de otras versiones españolas. Los resultados encontrados confirman las dos hipótesis. Para finalizar se comenta la diferente percepción de pacientes y profesionales de enfermería respecto a grupos de estresores determinados: gravedad del problema de salud, falta de información y sometimiento a las rutinas hospitalarias, entre otros.

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Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz

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Mode of access: Internet.

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Mode of access: Internet.

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Nota en cubierta: "Certamen literario de 1846. Disertante Dn. Benito Garcia de los Santos. Arguyentes Sres. Claramunt y Torrellas"

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Tít. entresacado del texto.

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Mode of access: Internet.

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En port.: Obra destinada a la enseñanza en el Real Colegio general militar.

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About 10% of faults involving the electrical system occurs in power transformers. Therefore, the protection applied to the power transformers is essential to ensure the continuous operation of this device and the efficiency of the electrical system. Among the protection functions applied to power transformers, the differential protection appears as one of the main schemes, presenting reliable discrimination between internal faults and external faults or inrush currents. However, when using the low frequency components of the differential currents flowing through the transformer, the main difficulty of the conventional methods of differential protection is the delay for detection of the events. However, internal faults, external faults and other disturbances related to the transformer operation present transient and can be appropriately detected by the wavelet transform. In this paper is proposed the development of a wavelet-based differential protection for detection and identification of external faults to the transformer, internal faults, and transformer energizing by using the wavelet coefficient energy of the differential currents. The obtained results reveal the advantages of using of the wavelet transform in the differential protection compared to conventional protection, since it provides reliability and speed in detection of these events.

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In this work, the reference drugs, generic and similar to the active ingredients acetylsalicylic acid, paracetamol, captopril, hydrochlorothiazide and mebendazole were purchased from local pharmacies and studied by thermogravimetry (TG) and Differential Scanning Calorimetry (DSC). Thermal decomposition was assessed to obtain from the Ozawa method the activation energy in inert atmosphere (nitrogen), using three different heating ratios (5, 10 and 20 o C min-1). The pharmaceutical formulation of the AAS reference was the one who presented different from the others (generic and similar) Thermogravimetric profile indicating likely interaction between the active ingredient and excipients. Was observed at the heating rate of the inverse temperature that no linearity of the data, ie, there was no correlation between the percentage of mass loss and the activation energy involved in the thermal decomposition of the pharmaceutical formulation of the AAS reference log graph. The analysis by differential scanning calorimetry was performed in nitrogen atmosphere with a heating rate of 10 ° C min-1. In the analysis of these same drugs, the data curves found on the melting point were, except for hydrochlorothiazide, are consistent with the literature. Hydrochlorothiazide presented a melting point well below that found in the literature, which may be justified due to the interaction of the active ingredient with the excipient lactose. In the study of purity, using the Van't Hoff equation, the reference drugs hydrochlorothiazide and mebendazole reference generic and showed similar impurity content below the limit established that this equation must be greater than 2.5 mol%

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Automatic detection of blood components is an important topic in the field of hematology. The segmentation is an important stage because it allows components to be grouped into common areas and processed separately and leukocyte differential classification enables them to be analyzed separately. With the auto-segmentation and differential classification, this work is contributing to the analysis process of blood components by providing tools that reduce the manual labor and increasing its accuracy and efficiency. Using techniques of digital image processing associated with a generic and automatic fuzzy approach, this work proposes two Fuzzy Inference Systems, defined as I and II, for autosegmentation of blood components and leukocyte differential classification, respectively, in microscopic images smears. Using the Fuzzy Inference System I, the proposed technique performs the segmentation of the image in four regions: the leukocyte’s nucleus and cytoplasm, erythrocyte and plasma area and using the Fuzzy Inference System II and the segmented leukocyte (nucleus and cytoplasm) classify them differentially in five types: basophils, eosinophils, lymphocytes, monocytes and neutrophils. Were used for testing 530 images containing microscopic samples of blood smears with different methods. The images were processed and its accuracy indices and Gold Standards were calculated and compared with the manual results and other results found at literature for the same problems. Regarding segmentation, a technique developed showed percentages of accuracy of 97.31% for leukocytes, 95.39% to erythrocytes and 95.06% for blood plasma. As for the differential classification, the percentage varied between 92.98% and 98.39% for the different leukocyte types. In addition to promoting auto-segmentation and differential classification, the proposed technique also contributes to the definition of new descriptors and the construction of an image database using various processes hematological staining

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La présente recherche a pour objectif analyser la reconfiguration d'un personnage dans deux romans et dans un texte dramatique de l’écrivaine française Marguerite Duras, qui font partie du Cicle indien. Ils sont : Le Ravissement de Lol V. Stein (1964), Le vice-consul (1965) e India Song (1975). Adoptant la perspective de la Comparaison Différentielle comme approche littéraire, proposée par Ute Heidmann (2008, 2010, 2012), professeur-docteur de l'Université de Lausanne (Suisse), ce travail cherche étudier le personnage Anne-Marie Stretter présent dans ces trois œuvres. On cherche comprendre de quelle manière se produit la réécriture du personnage à partir de trois axes d'analyse : les modalités de l'énonciation, en considérant l'analyse et la comparaison de l'œuvre littéraire comme un événement énonciatif, partant du concept de la scène d'énonciation, proposé par Dominique Maingueneau (2010) ; les modalités d'inscription générique, étroitement liées aux modalités énonciatives, avec un fondement théorique en Todorov (1980) et Heidmann (2012) ; et les modalités de dialogisme intertextuel et interdiscursif, considérant dans la relation dialogique des nouveaux et différentes propositions de sens. Para la compréhension de cela nous partons de Bakhtine (2010), Kristeva (1974), Todorov (1981) et de l'idée de dialogisme et intertextualité, pour arriver à l'idée d'interdiscours proposée par Heidmann (2010, 2012). À partir de cette étude, nous pouvons observer dans l'œuvre d'un même auteur différentes manières de construction d'un personnage, chacun avec ses spécificités et complexités, variant dans le genre et espaces discursifs. L'intérêt de la comparaison différentielle dans cette étude, partant d'un trait commun entre les trois œuvres, est de rendre visible les différences épistémologiques et les nouvelles propositions de sens.

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This research aims to systematize a proposal of developing a mobile tablet application in order to help implementing the Semantic Differential technique – SD, under the approach of Participatory Design. In 1975, Osgood et al. created the Semantic Differential technique. Since then, many experiments use it to measure the affective perception of individuals concerning objects and concepts by means of compounded scales of bipolar adjectives, based on the theoretical models that support the technique: the conductible, spatial and metric models. During the application of the technique with potential users, the researcher must simultaneously manage several contexts, that is, audio recorder, when authorized, and observe and record spontaneous reports of the respondent. It is noticeable that often occurs a cognitive overload during this event. Thus, the use of a single application whose interface is assigned to its users and respondents could assist researchers in applying the SD technique. This research aimed to understand the processes inherent to the task of implementing the Semantic Differential technique and obeyed the following steps: a) training of users, b) background questionnaire c) interview with Focus Group, and d) cooperative evaluation. Besides these procedures, one can also observe the degrees of facilitation or difficulty concerning the use of the conventional model, which is the development and application of scales with the aid of printed material, pencil, pens, clipboards, and recorder software for editing the document and data analysis. This paper comprises reactions and impressions from the experiences of users of SD technique. Considering the data recollected from the user’s observation, the hypothesis of the experiment proved to be right. It means that the development of the application for mobile tablet employing the technique of Semantic Differential is viable, since it assembles all the steps in one only tool, increases the accomplishment of the task between user/researcher and user/respondent resulting in their mutual satisfaction.