This thesis presents the design and implementation of a multifunctional radar sensor. Utilising microstrip transmission line technology, a front-end receiver has been designed based upon a six-port architecture. Additionally, digital signal processing has been implemented on a microcontroller, enabling processing and extraction of information from the down converted quadrature signals. Results have show that the sensor is capable of operating as both a continuous wave radar and frequency modulated continuous wave radar. Through measurements, it has been established that the sensor is capable of wireless measurements, such as vital signs and vibrations. Furthermore, a graphical user interface has been design, allowing a way of switching between different radar configurations and the presentation of measured data to the user.

Diese Untersuchung beschäftigt sich mit der Frage, welche Krankheitskonzepte depressiven Patienten (ICD-10) und ihre Partnern haben und welche Behandlungs-erfahrungen gemacht wurden. Das Ziel der Untersuchung besteht darin, auf der Grundlage einer ressourcenorientierten explorativen Sichtweise die rehabilitativen Möglichkeiten für depressive Patienten und ihre Partner zu erweitern und geschlechtsspezifische Unterschiede einzubeziehen. Die Forschung zur Compliance macht deutlich, dass die Übereinstimmung der Krankheitskonzepte die Behandlungsergebnisse entscheidend verbessern kann. Es wurde den Fragen nachgegangen, worin sich die Attributionen auf Krankheitsursachen bei Patienten und ihren Partnern unterscheiden und welche Auswirkungen sich für das partnerschaftliche Unterstützungsverhalten ergeben. Zudem wurden die motiva-tionalen Schemata auf der Grundlage der Konsistenztheorie (Grawe, 1998; 2004) erhoben, Geschlechtsunterschiede und die Partnerschaftsqualität beachtet. Als Theorien wurden zum Beispiel die Theorie der wahrgenommenen Verantwortlichkeit (Weiner, 1986) und der gelernten Hilflosigkeit (Seligman, 1975; Abramson, Seligman & Teasdale, 1978) und daraus Fragestellungen entwickelt. Diese Arbeit hat sich die Aufgabe gestellt, die persönlichen Besonderheiten der depressiven Patienten und ihrer Partner zu beachten. Die Methodik besteht aus einem semistrukturierten qualitativen Interview sowie standardisierten Fragebögen. Es wurden 46 depressive Patienten und 46 Partner einer Psychiatrie- und Psychotherapiestation untersucht. Es konnten verschiedene Zusammenhänge zwischen der Partnerschaftsqualität, der partnerschaftlichen Unterstützung, den Einstellungen und motivationalen Schemata gefunden werden. Die Ergebnisse zeigen, dass geschlechtsspezifische Unter-schiede bei Patienten und Partnern viel stärker in der Therapie beachtet werden sollten. Es konnte gezeigt werden, dass sich innerhalb der diagnostischen Zuord-nung einer Depression sehr verschiedene individuelle Krankheitskonzepte bei Patienten und bei den Partnern ergeben. Es lassen sich jedoch auch Probleme aufzeigen, die mit einem leitlinienorientierten Vorgehen in der Psychotherapie verbunden sind. Die qualitative Befragung konnte innere Prozesse und Entwicklungen gut sichtbar machen, die quantitative Methodik der Fragebögen bildete Status und überdauernde Motive gut ab. Mögliche Anwendungen und Impli-kationen für die klinische Praxis sowie die Einbeziehung der Partner werden diskutiert. / This study is employed with the questions what kind of illness representations and experiences of examination are generated by depressive patients (ICD-10) and their partners. The goal is existed in finding more possibilities in rehabilitation and therapy for the couples are based on resources and sex differences. The research of compliance comes to the resolution that the agreement in illness representations is able to improve the outcomes of therapy. Therefore, the questions are, which differences in illness representations by patients and partners, expectations, solutions of support by the couples, males and females can be found and what are the consequences for compliance and their relationship. Then, the motivational schemata based on the consistence-theory (Grawe, 1998; 2004) were considered. On basic were included the theories of perceived responsibility (Weiner, 1986) and learned helplessness (Seligman, 1975; Abramson, Seligman & Teasdale, 1978) and then developed individual questions. The method is a mixed design in qualitative (semi-structured interview) and quantitative instruments (tests). Data are used from 92 persons, 46 patients they are in clinical treatment and their partners. There are found that quality of partnership is associated with support, the expectations, attitudes and individual motivational schemata of the persons. Sex differences should be stronger observed in treatment. Turns out, into the notation “depression”, there are different individual illness representations of patients and their partners. The application of guideline-oriented procedures in psychotherapy has been criticized. Qualitative interviews were appropriate to describe processes and developments, quantitative tests were appropriate to expose the status and outlasting motives. Results are presented in terms of their implications for supporting treatment and involving partners into this process.

Es stellt einen bedeutsamen Marktvorteil für ein Unternehmen dar, abschätzen zu können, welche Produktidee auf dem Markt erfolgreich sein könnte und welche scheitern wird. Auf Basis psychologischer Erkenntnisse aus verschiedenen Forschungsfeldern kann die Marktforschung für Innovationen bereits in frühen Entwicklungsstadien wichtige Hinweise auf das Erfolgspotential eines neuen Produktes geben. Diese Arbeit beleuchtet zwei Aspekte der psychologischen Marktforschung für Innovationen genauer: Wie groß sind Bewertungsunterschiede zwischen Personen, die sich in gewissen Personeneigenschaften unterscheiden und welchen Einfluss hat die Präsentation einer Innovation auf die anschließende Bewertung? Zwei Studien wurden durchgeführt, um diese Fragen zu adressieren. Die Ergebnisse zeigen kaum Einfluss der Personeneigenschaften auf die Innovationsbewertung. Bezüglich der unterschiedlichen Präsentationsart ergeben sich keine signifikanten Unterschiede zwischen Bild- und Videopräsentationen. Wird die Innovation jedoch real erlebt, wird sie signifikant passender, besser bedienbar und begeisternder wahrgenommen. Die Implikationen für weitere Forschung und für die Praxis der Marktforschung werden diskutiert. / Early knowledge on what may and what may not be market success in the future is a key success factor for any company. Taking into account findings from different fields of psychology, market research in early development stages can provide important insights on the potential of a new product. Two aspects of psychological market research for innovations are studied in depth: To what extent do people with different personal attributes differ in their evaluation of an innovation? What are the effects of different presentation formats like pictures and videos when an innovation is evaluated? Two studies are conducted to attend to these questions. The results show little evidence that personal attributes influence the innovation evaluation. With regard to presentation format, only small evaluation differences are found between picture and video presentations. However, when the product is actually experienced, it is perceived to be more compatible, easier to use, and more exciting. Options for further research and practical implications are discussed.

Submitted by Cleide Dantas (cleidedantas@ufpa.br) on 2014-04-10T12:17:40Z No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EstudoTecnicaEnchimento.pdf: 2756317 bytes, checksum: 5368bbe5c167a43b3cf8052ad2645cf2 (MD5) / Approved for entry into archive by Ana Rosa Silva (arosa@ufpa.br) on 2014-06-23T02:13:36Z (GMT) No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EstudoTecnicaEnchimento.pdf: 2756317 bytes, checksum: 5368bbe5c167a43b3cf8052ad2645cf2 (MD5) / Made available in DSpace on 2014-06-23T02:13:36Z (GMT). No. of bitstreams: 2 license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Dissertacao_EstudoTecnicaEnchimento.pdf: 2756317 bytes, checksum: 5368bbe5c167a43b3cf8052ad2645cf2 (MD5) Previous issue date: 2011 / FAPESPA - Fundação Amazônia de Amparo a Estudos e Pesquisas / Nesse trabalho estudou-se a viabilidade operacional e as características econômicas e geométrica da técnica do processo de soldagem GMAW-CW (alimentação adicional de um arame frio) em comparação Gas Metal Arc Welding (GMAW). O sistema de alimentação de arame frio foi projetado e adaptado a pistola de soldagem MIG/MAG. Utilizou-se uma fonte eletrônica de múltiplos processos ajustada em tensão constante e CC+, a proteção gasosa foi uma mistura 75%Ar+25%CO2 e CO2 comercialmente puro. O arame utilizado foi o da classe ER70S-6 com diametro de 1,2 mm para o arame eletrodo e 1,0 mm para o arame frio, os dois arames foram alimentados em cabeçotes independentes. As variáveis operacionais de entrada foram: a velocidade de alimentação de arame energizado, em três níveis, 4, 6 e 8 m/min e a velocidade de alimentação do arame frio em 50%, 60% e 70% da velocidade de alimentação do arame energizado. As soldagens foram automatizadas em simples deposição no sentido empurrando e o posicionamento do arame frio, em um único nível, Tandem em chanfro em “U” de chapas de aço ASTM 1020. As variáveis de resposta utilizadas foram: inspeção superficial dos cordões; análise da geometria (largura, penetração, reforço e diluição) da solda e econômicas (taxa de fusão, taxa de deposição, rendimento e custo operacional). Os resultados indicaram que para a análise superficial, com o uso do gás Ar25%CO2 a superfície dos cordões mostraram-se mais homogêneas em relação ao CO2 e com menor índice de salpicagem, para a análise das características econômicas, o processo GMAW-CW sempre foi superior ao processo convencional, quanto aos custos operacionais o processo convencional mostrou-se menor, porém não houve o preenchimento do chanfro, o que ocorreu com a utilização do processo GMAW-CW. / In this work studied the operational viability and the characteristics economic and geometric of technique of the process welding GMAW -CW (additional alimentation of a cold wire) in comparison Gas Metal Arc Welding (GMAW). The alimentation system of cold wire was designed and adapted to welding gun GMAW. Used an electronic source of multiple processes adjusted in constant voltage and DC +, the gas shield was a mixture 75% Ar+25% CO2 and commercially pure CO2. The wire used was Class ER70S-6 with diameter of 1.2 mm for the electrode wire and 1.0 mm for the cold wire, the both wires were fed in heads independent. The input operating variables were the feed speed of wire energized at three levels, 4, 6 and 8 m / min and the wire feed speed in cold 50%, 60% and 70% of the wire feed speed energized . The welds were automated in simple deposited in the pushing direction and the positioning of the cold wire in a single level, Tandem in chamfer "U" steel plate ASTM 1020. The variables of response used were: superficial inspection of the cords, analysis of the geometry (width, penetration, reinforcement and dilution) and economic solder (melting rate, deposition rate, yield and operating cost). The results indicated that for surface analysis, using the AR25% CO2 gas to the surface of the strands were more homogeneous with respect to CO2 and less splash index for the analysis of economic characteristics, the process always GMAW-CW was superior to the conventional process, the operating costs the conventional process was lower, but without filling of the chamfer, which occurred with the use of GMAW-CW.

Rational harmonic mode-locking (RHML) fiber lasers generating picoseconds pulsewidth at high-repetition-rate have emerged as a key component for the high-bit-rate optical time-division multiplexing (OTDM) communication system. In this research, we have discovered higher order RHML semiconductor optical amplifier fiber laser (SOAFL) has the degradation on mode-locking capacity, and an output pulse-train with un-equalized peak amplitudes. Therefore, the main focus of the dissertation is focused on the pulse quality analysis and improvement of RHML-SOAFL via optical pulse injection. First, we observed the degradation on mode-locked mechanism of the dark-optical-comb injection mode-locked semiconductor optical amplifier fiber laser (SOAFL) at RHML order increases to >8. Such a less pronounced RHML mechanism at higher orders is mainly attributed to the weak mode-locking strength at high RHML orders as compared to continuous-wave (CW) lasing mechanism, which has been quantified by reduction of spectral linewidth and pulse-shortening force, and the ratio of DC/pulse amplitude enhancement for discriminating 1st to 20th-order RHML capability. To overcome the un-equalized RHML peak intensity, optical injection induced gain modulation of a SOA are demonstrated to equalize the peak intensity of 5-GHz and 40-GHz RHML-SOAFL by using 1-GHz inverse-optical-pulse and a reshaped 10-GHz gain-switching FPLD pulse injection, respectively. The optical injection mode-locking models are constructed to simulate the compensation of uneven amplitudes between adjacent RHML pulse peaks before and after pulse-amplitude equalization. The optimized RHML pulse exhibits a signal-to-noise suppression ratio of 45-dB, and the clock amplitude jitter below the threshold limitation of 10%. On the other hand, to avoid the mode-locked degradation on RHML, a 2nd-order fractional Talbot effect induced frequency-doubling of 10-GHz optical pulse-train is demonstrated to backward inject a SOAFL for 40-GHz RHML. In comparison with the SOAFL pulse-train repeated at 40-GHz generated by the 4th-order purely RHML process, the optimized 2nd-order fractional Talbot effect in combination with the 2nd-order RHML mechanism significantly enhances the modulation-depth of RHML, thus improving the on/off extinction ratio of the 40-GHz SOAFL pulse-train. Such a new scheme also provides a more stable 40-GHz RHML pulse-train from the SOAFL with its timing jitter reduce. Finally, we established a SHG-FROG to distinguish linear and nonlinear chirp of 10-GHz soliton HML-SOAFL, and further extracted intra-cavity linear dispersion via simulation of Schrodinger equation. After the procedure, the linear chirp almost dominates chirp characteristics for optical pulse injection HML-SOAFL system.

This thesis addresses the design study, implementation and analysis of signal processing algorithms for a 79 GHz millimeter-wave Phase Modulated Continuous Wave (PMCW) Multi Input Multi Output (MIMO) short range radar; performed in IMEC research institute (Leuven, Belgium). The radar system targets high resolution performance with low power consumption in order to integrate a full MIMO radar transceiver with digital processor and antennas in a compact package featuring a size of 1 cm2. Achieving such radar system characteristics requires the exploitation of a highly demanding digital architecture with signal processing gain and high range, speed and angle resolutions. The improved resolution and detection capabilities will be achieved by performing signal processing algorithms on the reflected waveform. The digital front-end implements parallel range gate processing with a bank of correlators that perform: pulse compression, coherent accumulation to further increase Signal to Noise Ratio (SNR) and N-point FFT to extract the Doppler information. The use of MIMO is proposed implementing a code domain technique in the PMCW waveform, the Outer Hadamard Code MIMO. This concept makes use of a unique sequence for all the transmitting antennas that is rendered by an outer sequence to ensure the orthogonality of the transmitted waveforms. The outer code makes use of the good cross-correlation properties of the Hadamard sequences and the waveform uses sequences that exhibit perfect auto-correlation profile, the Almost Perfect Autocorrelation Sequences (APAS). The MIMO implementation results in higher angular resolution and extra processing gain. The use of beamforming techniques in the radar allows the angle estimation of the detected targets; using rough and fine beamforming that provides with coarse and precise Angle of Arrival (AoA) estimation in an early and late stage respectively. A Constant False Alarm Rate (CFAR) processing stage is implemented in the stage of the system where higher signal processing gain is achieved. This algorithm allows the variation of the CFAR parameters and analyzes the detections in order to improve the probability of detection (Pd) while decreasing the probability of false alarm (Pfa). A series of simulations with different scenarios and variable parameters are set in order to analyze the performance of the system. The simulations analyze the gain achieved in each stage and their outcomes show an impressive processing gain that can reach SNR improvements as high as 77 dB for a small virtual array while keeping the Pfa low with the CFAR adjustment. The use of bigger arrays demonstrates the possibility to enable clear detections for low Radar Cross Section (RCS) targets in far distances of the unambiguous range. The use of beamforming shows interference reduction improvement as the beam widths narrow with the increasing number of virtual array antennas. These results have been achieved while keeping the system design parameters to a range resolution of 7.5 cm for a maximum range of 37.5 meters with speed resolution of 0.2 m/s and a maximum detectable speed of 12.66 m/s. The outcomes support the good performance of the signal processing techniques implemented and the benefits in applying them in a SoC mmWave MIMO radar.

This research was a collaborative effort between the Air Force Research Laboratory (AFRL) and the University of Texas to examine the laser-tissue interaction of thermal lensing induced by continuous-wave, CW, near-infrared, NIR, laser radiation in the eye and its influence on the formation of a retinal lesion from said radiation. CW NIR laser radiation can lead to a thermal lesion induced on the retina given sufficient power and exposure duration as related to three basic parameters; the percent of transmitted energy to, the optical absorption of, and the size of the laser-beam created at the retina. Thermal lensing is a well-known phenomenon arising from the optical absorption, and subsequent temperature rise, along the path of the propagating beam through a medium. Thermal lensing causes the laser-beam profile delivered to the retina to be time dependent. Analysis of a dual-beam, multidimensional, high-frame rate, confocal imaging system in an artificial eye determined the rate of thermal lensing in aqueous media exposed to 1110, 1130, 1150 and 1318-nm wavelengths was related to the power density created along the optical axis and linear absorption coefficient of the medium. An adaptive optics imaging system was used to record the aberrations induced by the thermal lens at the retina in an artificial eye during steady-state. Though the laser-beam profiles changed over the exposure time, the CW NIR retinal damage thresholds between 1110-1319-nm were determined to follow conventional fitting algorithms which neglected thermal lensing. A first-order mathematical model of thermal lensing was developed by conjoining an ABCD beam propagation method, Beer's law of attenuation, and a solution to the heat-equation with respect to radial diffusion. The model predicted that thermal lensing would be strongest for small (< 4-mm) 1/e² laser-beam diameters input at the corneal plane and weakly transmitted wavelengths where less than 5% of the energy is delivered to the retina. The model predicted thermal lensing would cause the retinal damage threshold for wavelengths above 1300-nm to increase with decreasing beam-diameters delivered to the corneal plane, a behavior which was opposite of equivalent conditions simulated without thermal lensing. / text

Orientador: Ermínia de Lourdes Campello Fanti / Banca: Tomas Edson Barros / Banca: Maria Gorete Carreira Andrade / Resumo: O objetivo principal deste trabalho é mostrar a existência dos complexos de Eilenberg-MacLane, ou K(G, n)-espaços (como são comumente chamados), para G um grupo arbitrþario se n = 1, e G abeliano, se n = 2. Esses espaicos desempenham um papel muito importante na Topologia Algébrica, principalmente na conexão entre homotopia e (co)homologia / Abstract: The main purpose of this work is to show the existence of the Eilenberg- Maclaneþs complexes, or K(G, n)-spaces (as they are usually called), for an arbitrary group G if n = 1, and G abelian, if n = 2. Such spaces play a very important role in Algebraic Topology, mainly in the connection between homotopy and (co)homology. / Mestre

This thesis describes design of Simulator FM-CW range finders. It is choosing the optimal method of realization and inform about basic properties of continuous working radar. The work includes an analysis of errors in real rangefinder and a numerical estimate of the maximum error in real devices. Contains detailed block diagram of simulator FM-CW range-finder and computer simulation of function generator frequency modulated signal, demodulator. Further work includes the complete construction documents for the preparation and implementation of basic functional verification

Using the concept of the build-up cavity for second harmonic generation to produce 243nm laser light, an innovative cavity is theoretically explored using a 15mm length CLBO crystal. In order to limit the losses of the cavity, the number of effective optical surfaces is kept to only four and the use of a MgF2 crystal is adopted to separate the harmonic and fundamental laser beam from each other. The cavity is shown to have an expected round trip loss of five tenths of a percent or better, resulting in a conversion efficiency greater than 65%.