Global ETD Search

41	Theory and Numerics for Shape Optimization in Superconductivity / Theorie und Numerik für ein Formoptimierungsproblem aus der Supraleitung Heese, Harald 21 July 2006 (has links) No description available. 510 Mathematik Mathematics and Computer Science Supraleitung Randwertproblem Integralgleichungen Level Set Methoden Formoptimierung superconductivity boundary value problem integral equations level set methods shape optimization 31.80 33.06 31.76 electromagnetic theory: General}
42	Magnetic Tomography / On the Nullspace of the Biot-Savart Operator and Point Sources in Field and Domain Reconstruction / Magnetische Tomographie / Über den Nullraum des Biot-Savart Operators und Punktquellen für Feld- und Gebietsrekonstruktion Kühn, Lars 27 May 2005 (has links) No description available. 510 Mathematik Mathematics and Computer Science Biot-Savart Inverse Probleme Nullraum Punktquellenmethode No Response Test Biot-Savart Inverse Problems Nullspace Point Source Method No Response Test 31.40 31.45 31.76 EDBB200
43	Efficient Design of Embedded Data Acquisition Systems Based on Smart Sampling Satyanarayana, J V January 2014 (has links) (PDF) Data acquisition from multiple analog channels is an important function in many embedded devices used in avionics, medical electronics, robotics and space applications. It is desirable to engineer these systems to reduce their size, power consumption, heat dissipation and cost. The goal of this research is to explore designs that exploit a priori knowledge of the input signals in order to achieve these objectives. Sparsity is a commonly observed property in signals that facilitates sub-Nyquist sampling and reconstruction through compressed sensing, thereby reducing the number of A to D conversions. New architectures are proposed for the real-time, compressed acquisition of streaming signals. A. It is demonstrated that by sampling a collection of signals in a multiplexed fashion, it is possible to efficiently utilize all the available sampling cycles of the analogue-to-digital converters (ADCs), facilitating the acquisition of multiple signals using fewer ADCs. The proposed method is modified to accommodate more general signals, for which spectral leakage, due to the occurrence of non-integral number of cycles in the reconstruction window, violates the sparsity assumption. When the objective is to only detect the constituent frequencies in the signals, as against exact reconstruction, it can be achieved surprisingly well even in the presence of severe noise (SNR ~ 5 dB) and considerable undersampling. This has been applied to the detection of the carrier frequency in a noisy FM signal. Information redundancy due to inter-signal correlation gives scope for compressed acquisition of a set of signals that may not be individually sparse. A scheme has been proposed in which the correlation structure in a set of signals is progressively learnt within a small fraction of the duration of acquisition, because of which only a few ADCs are adequate for capturing the signals. Signals from the different channels of EEG possess significant correlation. Employing signals taken from the Physionet database, the correlation structure of nearby EEG electrodes was captured. Subsequent to this training phase, the learnt KLT matrix has been used to reconstruct signals of all the electrodes with reasonably good accuracy from the recordings of a subset of electrodes. Average error is below 10% between the original and reconstructed signals with respect to the power in delta, theta and alpha bands: and below 15% in the beta band. It was also possible to reconstruct all the channels in the 10-10 system of electrode placement with an average error less than 8% using recordings on the sparser 10-20 system. In another design, a set of signals are collectively sampled on a finer sampling grid using ADCs driven by phase-shifted clocks. Thus, each signal is sampled at an effective rate that is a multiple of the ADC sampling rate. So, it is possible to have a less steep transition between the pass band and the stop band, thereby reducing the order of the anti-aliasing filter from 30 to 8. This scheme has been applied to the acquisition of voltages proportional to the deflection of the control surfaces in an aerospace vehicle. The idle sampling cycles of an ADC that performs compressive sub-sampling of a sparse signal, can be used to acquire the residue left after a coarse low-resolution sample is taken in the preceding cycle, like in a pipelined ADC. Using a general purpose, low resolution ADC, a DAC and a summer, one can acquire a sparse signal with double the resolution of the ADC, without having to use a dedicated pipelined ADC. It has also been demonstrated as to how this idea can be applied to achieve a higher dynamic range in the acquisition of fetal electrocardiogram signals. Finally, it is possible to combine more than one of the proposed schemes, to handle acquisition of diverse signals with di_erent kinds of sparsity. The implementation of the proposed schemes in such an integrated design can share common hardware components so as to achieve a compact design. Analog-To-Digital Converters Smart-Sampling Data Acquisition Embedded Data Acquisition Systems Sparse Signals Embedded Systems Compressed Sensing Signal Processing Multiplexed Compressed Sensing Multiplexed Signal Acquisition Data Acquisition MOSAICS Multiple Sparse Signals Compact Embedded Designs Correlated Signals Electrical Engineering
44	Analýza chování řidiče při řešení situací spojených s přecházením chodců přes vozovku / Analysis of driver’s conduct during solving of situations associated with pedestrians crossing the road Maxera, Pavel January 2021 (has links) The doctoral thesis analyses driver’s conduct while solving situations associated with crossing of pedestrians across the road in cases of various design of pedestrian crossings and at different conditions. The thesis deepens the knowledge of the human factor impact on the occurrence of a traffic accident involved vehicle and pedestrian and thesis also complements knowledge for the needs of the analysis of traffic accidents, especially in solving the pre collision phase and at assessment of possibilities for collision prevention by involved participants. The thesis deals with driver’s conduct, various models of the conduct as well as the thesis focuses on the visual perception, the process of information processing, the driver’s conduct and the reaction time. In terms of the solution suitable types of experiments were designed and implemented. Based on performed measurements a method of processing and evaluating data on drivers’ conduct was found as well as more significant data set was obtained for a detailed analysis of drivers' conduct in different driving situations. The assessed quantities of drivers' conduct were analysed with respect to the dangerousness of driving situations. For these purposes, the categories of the dangerousness of driving situations were defined (situations completely safe, with increased danger, dangerous and critical), into which the analysed driving situations were subsequently included. To enable the quantification of this classification of situations into the categories of the dangerousness, the coefficient of the dangerousness (so called K) was defined. From the detailed analysis of the obtained data, the limit values of this coefficient were determined, and these were subsequently verified using data from the solution of real traffic accidents. Concurrently the analysis verified the suitability of using this hazard coefficient in the analysis of traffic accidents, especially for a detailed assessment of the possibilities of collision prevention.
45	Delay Management in Public Transportation: Capacities, Robustness, and Integration / Anschlusssicherung im Öffentlichen Verkehr: Kapazitäten, Robustheit und Integration Schachtebeck, Michael 17 December 2009 (has links) No description available. 510 Mathematik Mathematics and Computer Science Anschlusssicherung Kapazitätsrestriktionen ganzzahlige Programmierung Reduktionsverfahren Heuristiken delay management capacity constraints integer programming reduction techniques heuristics 31.12 31.80 85.03 EJAB 060: Transportation logistics {Operations research LCC 024: Operations Research Optimierung {Wirtschaftsmathematik}
46	Extrafiscalidade: identificação, fundamentação, limitação e controle / Extrafiscalidade: identificação, fundamentação, limitação e controle Bomfim, Diego Marcel Costa 25 April 2014 (has links) Esta tese tem como objetivo investigar os limites constitucionais ao emprego de normas tributárias extrafiscais, contribuindo, de maneira original, com o desenvolvimento de métodos que possibilitem que estes instrumentos sejam controlados de modo mais preciso pelo Poder Judiciário. Para a consecução deste objetivo central, trabalhou-se a partir de quatro blocos de investigação. Primeiro, a pesquisa centrou-se em discutir a importância de segregação das normas tributárias entre fiscais e extrafiscais, analisando as diversas propostas de métodos para a separação entre estas. Ao final, a tese sugere que as normas tributárias extrafiscais devem ser identificadas a partir das suas finalidades, conforme venha a ser interpretado pelo aplicador da norma. Superada a questão, passa-se à investigação dos fundamentos constitucionais que legitimam o emprego das normas tributárias extrafiscais, quando se debate em que sentido normativo se pode falar em neutralidade tributária. Em um terceiro módulo de investigação, as normas tributárias extrafiscais são contrapostas às limitações constitucionais ao poder de tributar, ao conflito entre competência regulatória e competência tributária, ao conceito constitucional de tributo, bem como aos limites ínsitos às espécies tributárias previstas pela Constituição Federal. Por fim, apresenta-se um modelo de protocolo decisório que pode ser utilizado para fins de controlabilidade das normas tributárias extrafiscais pelo Poder Judiciário, colocando-se em destaque os princípios da igualdade e da proporcionalidade. / The main goal of this thesis is to investigate the constitutional limits on the use of non-fiscal purpose tax laws, contributing, with originality, to the development of methods that allow a more precise control of these instruments by the Judiciary Branch. To achieve such goal, the thesis was divided into four parts. The first part focuses in discussing the importance of segregation of tax laws in two groups: fiscal and non-fiscal, and analyzes the numerous methods proposed for such classification. The thesis suggests that non-fiscal purpose tax laws must be identified by their purpose, as interpreted by those responsible for applying the law. The second part investigates the constitutional basis that legitimates the use of non-fiscal purpose tax laws and discusses to what normative extent one can speak of tax neutrality. In the third part, the non-fiscal purpose tax laws are compared to the constitutional limits on taxation, to the conflict between regulatory competence and fiscal competence, to the constitutional concept of tax, as well as to the limits involving the tax species provided by the Federal Constitution. Finally, a model of decision making protocol is presented for use a mean of control by the Judiciary Branch of the non-fiscal purpose tax, highlighting the principles of equality and proportionality. Competência tributária Competência tributária da união contributing Direito tributário Fiscalização tributária to the constitutional concept of tax with originality
47	Barnrättsperspektiv i vårdnadsmål vid risk för separationsvåld eller så kallat ”eftervåld” : En studie om rättens avvägning mellan skydd för barn och barns rätt till en nära och god kontakt med båda föräldrarna / The children rights perspective in custody cases in case of risk of separation violence or so-called ”post-separation violence” : A study of the court's balance between protection of children and children's right to close and good contact with both parents Chavez Lupe, Lynette, Falk, Stina January 2022 (has links) It's a misconception that those who leave a violent relationship are safer than those who stay. For those who have children with their perpetrator there is an increased risk for post-separation violence (Fleury, Sullivan & Bybee, 2000). The aim of this study has been to examine the child rights perspective through how the court judges and resonates in custody disputes with information regarding violence and therefore a possible risk for post-separation violence. Data was retrieved in the form of 34 custody cases from the court of appeal. In order to fulfil the purpose of the study a multi-method investigation has been used, both a quantitative content analysis and a discourse analysis. The results showed that the parent who was mainly referred to as the perpetrator was assigned visitation rights in 64.4 % of the cases, joint custody in 46.6 % and housing in 20 %. The main result showed that the courts ruled the child’s right to close and good contact with both parents outweighs the risk of post-separation abuse, either towards the other parent or the child himself. Children should be allowed to grow up with both parents. However, one could question at what price. Separation violence post-separation violence exposed to violence exposed violence post divorce children in domestic violence post divorce parenting child rights perspective custody cases custody disputes best interest of the child the child's claim intimate partner violence IPV child affected family conflict family dispute court of appeal witnessing violence victim of violence family violence child rights children's rights custody battle post separation post-separation dispute domestic violence domestic violence after separation false allegations false allegations in custody battle parental alienation family violence separation assault involving children Separationsvåld eftervåld barnrättsperspektiv vårdnadsmål vårdnadstvister barnets bästa barnets utsaga barnperspektiv våld i nära relationer vårdnadsmål socionom socialt arbete familjerätt barnrätt diskursanalys kvantitativ innehållsanalys separation familjekonflikt barnets vilja umgängessabotage föräldraalienation samarbetssvårigheter vårdnadskonflikt barnets påverkan barnkonventionen föräldrabalken risk för eftervåld risk för seprationsvåld hovrättsdomar bevittna våld våldsutövare använda barn som redskap använda barn som verktyg falska uppgifter falska uppgifter om våld uppgifter om våld falska anklagelser vårdnadstvister falska anklagelser föräldraalienation våld i hemmet våld i nära relationer umgängesrätt gemensam vårdnad vårdnad boende umgänge våldsutsatt hovrätten föräldrarätt Social Work Socialt arbete

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