No description available.

Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Neste trabalho, alÃm dos capÃtulos que envolvem a teoria e definiÃÃes, foi basicamente divido em trÃs estudos: Primeiro (capÃtulo 4), apresentamos uma investigaÃÃo numÃrica do desempenho de um filtro passa-banda totalmente Ãptico composto por um acoplador direcional duplo seguido de duas grades de Bragg simetricamente iguais gravadas nos seus braÃos de saÃda. Esta configuraÃÃo caracteriza um InterferÃmetro de Michelson com caracterÃsticas de um filtro add/drop. As caracterÃsticas de transmissÃo (T), taxa de extinÃÃo (XR) e âcrosstalkâ (XT) foram estudadas a partir da aplicaÃÃo de um sinal CW (onda contÃnua) na entrada do dispositivo. A teoria de modos acoplados e o mÃtodo de Runge Kutta de 4a ordem foram aplicados, respectivamente para resolver as equaÃÃes diferenciais acopladas. Este à o primeiro estudo feito considerando a nÃo linearidade do acoplador e a linearidade das grades de Bragg. O dispositivo apresenta um comportamento altamente nÃo-linear em funÃÃo do defasamento entre as amplitudes dos feixes refletidos e em funÃÃo da potÃncia de entrada. Num segundo momento (capÃtulo 5) apresentamos a propagaÃÃo e chaveamento de pulsos ultracurto (~2ps) usando um interferÃmetro de Michelson de Fibras Ãpticas. Neste estudo o desempenho do interferÃmetro à estudado como uma funÃÃo das caracterÃsticas nÃo lineares do acoplador e das grades de Bragg. Os estudos numÃricos foram feitos a partir das equaÃÃes de modos acoplados resolvidas usando o mÃtodo de Runge-Kutta de 4 ordem. As caracterÃsticas de chaveamento do pulso foram analisadas em funÃÃo da potÃncia de entrada e do defasamento aplicado em uma das grades de Bragg. As caracterÃsticas de transmissÃo (T), coeficiente de ExtinÃÃo (XR), âcrosstalkâ (XT), fator de compressÃo (FC). Utilizamos trÃs valores de potÃncia de entrada: abaixo da potÃncia critica (P0=1W), igual a potÃncia crÃtica (P0=1,73W) e acima da potÃncia crÃtica (P0=1,95W). AtravÃs deste estudo, pode-se verificar que a transmissÃo, taxa de extinÃÃo, âcrosstalkâ e fator de compressÃo dependem da potÃncia da bombeio inserida no dispositivo e da defasagem aplicada. O interferÃmetro de Michelson em fibras implementa componente de grande importÃncia para aplicaÃÃes em redes Ãpticas, como os demultiplexadores add/drop. Este dispositivo tem atraÃdo bastante interesse no campo das telecomunicaÃÃes devido a sua alta capacidade de taxas de transmissÃo. Num terceiro momento foi apresentado um estudo de simulaÃÃo numÃrica do desempenho da codificaÃÃo e decodificaÃÃo de pulsos Ãpticos curtos (ps) em sistemas OCDMA (Optical Code Division Multiple Access â acesso VIII mÃltiplo por divisÃo de cÃdigo no domÃnio Ãptico) baseado em FBG (Fiber Bragg Grating â grade de Bragg em fibra Ãptica) onde os cÃdigos sÃo inseridos atravÃs de saltos discretos na fase Ãptica (Âπ). Para geraÃÃo de pulsos codificados foram utilizados cÃdigos de Gold obtidos analiticamente. Analisamos como a inserÃÃo de cÃdigos adicionais afetam a autocorrelaÃÃo e correlaÃÃo cruzada. O interferÃmetro de Michelson inicialmente estudado no capÃtulo 4 foi utilizado para propagaÃÃo e chaveamento de sinais codificados. Baseados nas caracterÃsticas de TransmissÃo (T) e Taxa de extinÃÃo (XR) fizemos um estudo do dispositivo como multiplexador /demultiplexador add/drop na recuperaÃÃo de pulsos codificados. / This work, in addition the chapters which involves both theory and definitions, was basically divided three studies: First (chapter 4),we present a numerical investigation of the performance of a bandpass filter composed of an all-optical directional coupler, followed by two double bars Bragg recorded symmetrically equal outputs in their arms. This configuration features a Michelson interferometer with characteristics of an add/ drop filter. The transmission characteristics (T), extinction rate (XR) and "crosstalk" (XT) were studied based on the application of a CW signal (continuous wave) into the device. Theory of coupled modes and the Runge Kutta fourth order were applied respectively to solve the coupled differential equations. This is the first study considering the nonlinearity of the coupler and the linearity of Bragg gratings. The device features a highly nonlinear behavior as a function of dephasing between the amplitudes of the reflected beams and depending on the input power. In a second step (section 5), the propagation and switching of ultrashort pulse (~ 2PS) Michelson interferometer using an optical fiber. In this study the performance of the interferometer is studied as a function of the nonlinear characteristics of the coupler and Bragg gratings. The numerical studies were made from the coupled mode equations solved using the Runge-Kutta 4th order. The pulse switching characteristics were analyzed as a function of input power and applied to one dephasing Bragg gratings. The transmission characteristics (T), extinction coefficient (XR), "crosstalk" (XT), the compression factor (CF)and shape of the pulses were analyzed for different values of phase and different input powers. We use three values of input power: below the critical power (1W = P0), equal to the critical power (P0 = 1.73W) and above the critical power (P0 = 1.95W). Through this study, it is found that the transmission rate of extinction, "crosstalk" and compression factor depends on the power of the pump device inserted into the gap and applied The Michelson interferometer fiber implement major component with applications in optical networks, such as demultiplexers add/drop. This device has attracted considerable interest in the field of telecommunications due to its ability of high transmission rates. In the third place was presented a numerical simulation study of the performance of encoding and decoding of short optical pulses (ps) systems OCDMA (Optical Code Division Multiple Access based on FBG (Fiber Bragg Grating ) where codes are inserted through discrete jumps in the optical phase ( π). For generation of coded pulses were used Gold codes obtained analytically. We look at how the inclusion of additional codes affect the autocorrelation and cross correlation.The Michelson interferometer initially studied Chapters 4 was used for propagation and switching of encrypted signals. Based on the characteristics of transmission (T) and extinction rate (XR) did a study of the device as multiplexer/demultiplexer add / drop in the recovery of coded pulses.

Le trouble du déficit de l’attention avec ou sans hyperactivité est un sujet qui a été maintes fois étudié. Pourtant, peu de recherches ont été construites en se basant sur l’expérience des personnes directement concernées. Ce mémoire propose une analyse exploratoire des récits de vie de 8 personnes âgées de 20 à 30 ans qui ont été diagnostiquées pendant l’enfance ou l’adolescence. Les principaux thèmes abordés par celles-ci sont : les relations familiales, les relations avec le milieu scolaire, le processus de diagnostic, la relation avec la médication, la relation avec les experts, le rapport possible avec d’autres « problématiques » vécues simultanément et leur perception du regard de l’autre. À travers leur récit, on comprend que ces personnes vivent un rapport complexe avec leur diagnostic ne pouvant être réduit qu’à quelques facteurs. De cette manière, il est primordial de s’intéresser à leur expérience pour en dresser le portrait le plus complet possible et en comprendre les conséquences pour elles. / Although the subject of Attention Deficit Disorder with or without Hyperactivity has been widely studied, most studies have not considered directly the experiences of diagnosed persons. Thus, this exploratory research analyses the life narratives of 8 people aged between 20 and 30 years old whom have been diagnosed in their infancy or teenage years. Certain themes have been discussed throughout the interviews such as : their relationship with their families, their relationship with school, their perceptions of medication, their diagnosis’ process, their relationship with experts, the possibility of living simultaneously others “problems” and their perception of others’ opinion regarding the diagnosis. As their story is told, the listener understands the complex relation they have with their diagnosis which cannot be reduce to a few aspects. Thus, it is necessary to consider their experience in order to paint a picture as complete as possible and to better understand the consequences a diagnosis has on their life.

This master thesis deals with the implementation of variants of cryptographic libraries containing primitives for elliptic curves. By creating custom metering charts to compare each implementation. The main task was not only the implementation of libraries but also the design and implementation of test scenarios together with the creation of measurement methods for different libraries and hardware platforms. As a result, a number of experimental tests were conducted on different curves and their parameters so that the results of the work included complex problems of elliptic curves in cryptography. The main parameters were power, time and memory consumption.

This document's objective is to propose a set of methods for improvement of the organization and methodology of software testing and subsequent application of those in a real environment of the Siemens CZ company. The first part discusses the development models in terms of testing segment and the following section focuses specifically on the methodology of agile testing and development as a whole, including applicable metrics for evaluating various aspects of software exiting the testing phase. The third major section lets the reader get acquainted with the Siemens organization and methods of their software testing and by analyzing real-world project it assesses the strengths and weaknesses of the particular testing process and its management. The practical part of this thesis lies in the design and implementation of a plug-in for the JIRA environment. This tool is able to identify and quantify the long term status of the project phases of agile development and testing in a clear and interactive way, while the outputs are represented by clearly defined problems that can be more easily treated, as one can argue further progress.

The thesis describes the basic types of barcodes, their development and history. It's mentioned cutting barcodes by dimension, types of barcodes which are the best known and the best used, are described. The key chapter describes details of EAN-8, EAN-13, UPC-A and the additional symbol. It's outlined an algorithm for decoding barcode in image. In conclusion, the results are evaluated and a further development of the project is outlined.

This thesis aims to to see if its possible to meet some of the complex needs of people with ADHD, in the form of aiding them with remembering to complete tasks and chores. Current studies have mainly focused on either assessing or treating ADHD rather than looking at aiding people already diagnosed. In order to evaluate if the needs can be met the participants of the paper are first interviewed to determine some of the needs. A mobile application was then developed based on the data collected from the interviews and later evaluated by the participants in a second round of interviews. The result of this paper showed that these complex needs can be met, in this paper the needs managed to be met with the use of mobile notifications that server as reminders and also by letting the participants prioritize the importance of the task. However the application did not fully suit all participants and had some shortcomings which could lead to further research that looks at trying to meet more of these needs, either by continued development of the application or by mapping out what the needs are.

No description available.

No description available.

Although thet:e has been gradual awat:eness of leat:ning disabilities aftet: Wodd Wat: II, it was in the late 1960's that compt:ehensive assessment and special education wet:e provided in schools. Specifically, in the at:ea of services for families, a reaffirmation of the fundamental rights of chilruen and families emerges. Although stress associated with the presence of a learning disabled child is an important consideration, its impact on the family is related to the family members' cognitive appraisal of the stress situation and thett copmg resources. Parents of learning disabled chilruen experience more stress, often exacerbated by faulty, misunderstood coping efforts that increase conflict in the family. Reseat:chers have investigated how: families manage stress; and cope with the multiple stt:esses of rearing a learning disabled children. It has been found that while many families cope, others cannot. Stress theory has dttected our attention to circumstances that weaken families and exacerbate distress. Preventative and ameliorative services at:e needed to assist such families. Stress and coping theory suggest that differences in families' reactions to learning disabilities may be related to amount and quality of resources available to pat:ents. This involves cognitive adaptation using coping skills, enabling them to t:e-evaluate stressful events positively. Another resource would be professionals, whose role would be of a facilitator, strengthening the ability of the family to gain access to needed services while increasing the family's mastery of coping with learning disability. Research has shown that parents' initial contact with learning disability and how to assist their learning disabled child was stressful. After parents received counselling on coping with their stress and stress management, and after the child's psycho-educational assessment and remedial measures were implemented, there has been significant positive feedback from parents and children. Research would embrace relationships between perceptions and family well-being using Ellis's rational-emotive therapy, thereby contributing to better understanding of how families cope with stress. Ayurvedic principles would be used to adopt a holistic approach to life. By using RET and A yurvedics the researcher was able to assist parents with learning disabled children to cope better with their stresses and effectively manage their child's learning disability. / Psychology of Education / D. Ed. (Psychology of Education)