One unresolved question in hadronic physics is the origin of large transverse single-spin asymmetries, AN, observed in hadron production from high-energy polarized-proton collisions. Collinear perturbative Quantum Chromodynamics (pQCD) predicts that AN should scale with the quark mass, however, experiments have since reported large AN for inclusive hadron production. Recent measurements from RHIC experiments show examples of these asymmetries at forward angles in a kinematic region where pQCD cross-section calculations reasonably agree with measured cross-sections. Disentangling dynamical contributions to AN from hadro-production requires moving beyond inclusive measurements. One possibility is to investigate asymmetries in two-particle correlations due to Interference Fragmentation Functions (IFF) and the Sivers effect. In 2008, RHIC dedicated a portion of the run to transversely polarized proton collisions at sqrt(s) = 200 GeV. STAR was equipped with a Foward Meson Spectrometer (FMS) and a Forward Time Projection Chamber (FTPC), overlapping in the pseudorapidity range of 2.5 < eta &lt; 4. By analyzing neutral pions with the FMS correlated with charged particles from the FTPC, correlation asymmetries can be measured at kinematics where large inclusive asymmetries have been measured. Correlations are measured for pi^0's with 2 &lt; pT, pi^0 &lt; 5 GeV/c and associated charged particles in two ranges of transverse momentum: 1 &lt; pT, ch &lt; 2 GeV/c and 0.5 &lt; pT, ch &lt; 1 GeV/c. IFF and Sivers asymmetries manifest themselves through the correlation of two particles from the same jet. These events are selected through a cut on the pair radius, delta R. Gain non-uniformities and electronics failures have resulted in large holes in trigger acceptance and associated particle acceptance, respectively. This non-uniform acceptance allows the Sivers and IFF effects to mix and distort the raw asymmetries. Techniques are developed to measure this leak-through by means of unpolarized yields and event weighting. They result in small corrections to the asymmetries. IFF and Sivers asymmetries both for xF > 0 and for xF &lt; 0 are reported for forward-angle pi^0-charged particle correlations from polarized-proton collisions at sqrt(s) = 200 GeV. Asymmetries are shown corrected for full underlying-event and pileup backgrounds, as well as corrected only for pile-up contributions. It appears the asymmetries are less sensitive to delta R when corrected for the full underlying-event background. Unfortunately, statistics limitations preclude a firm conclusion.

Traditional FPGA-based digital design is based on writing hardware definition language (HDL) code from scratch. Time to market, cost of development, and the level of training required for designers all can be reduced with a simplified and abstracted design strategy. This project intends to demonstrate a graphical user interface (GUI) layer of abstraction on top of existing commercially produced design aids including MATLAB, Simulink, and Xilinx System Generator. This project performs and demonstrates a specific implementation example of a Secondary Surveillance Radar (SSR) message decoder as proof-of-concept for the abstracted design method. The abstracted digital design methods shown in this project can be adapted for use in other areas of development and research including digital signal processing and communications.

This master thesis investigates how certain components error margin may affect the accuracy of a IFF monopulse receiver. The IFF monopulse receiver measures the angle of arrival of the incident signal by comparing sum and difference signals created in the receiver. The components of interest are phase shifters and attenuators, where both can give individual and different errors depending on the antenna steering angle. The project is conducted at Saab Aeronautics, based on a receiver in development for the Gripen E aircraft. The results of the thesis generated results showing that the angular accuracy decreases with the increase of steering angle. The angular deviation can for some cases be seen as sufficiently small for the receiver to work properly in the ideal case.

Submitted by Marcia Silva (marcia@latec.uff.br) on 2015-10-29T13:57:52Z No. of bitstreams: 1 dissert Maria Celeste de Carvalho Ressiguier Ribeiro.pdf: 12817772 bytes, checksum: b23ae40921877e1329e6a70604a1f9fe (MD5) / Made available in DSpace on 2015-10-29T13:57:52Z (GMT). No. of bitstreams: 1 dissert Maria Celeste de Carvalho Ressiguier Ribeiro.pdf: 12817772 bytes, checksum: b23ae40921877e1329e6a70604a1f9fe (MD5) Previous issue date: 2014-06-14 / Este trabalho desenvolve um modelo para a seleção de propostas de projetos de pesquisa, básica e aplicada, com o apoio de método multicritério à decisão, já existente. Como método multicritério, é aplicado o Analytic Hierarchy Process (AHP), combinando as mensurações relativa e absoluta, para ajudar os gestores do IF Fluminense, na área de pesquisa. O modelo proposto visa à priorização e seleção de projetos que atendam, satisfatoriamente, aos propósitos da instituição e aos requisitos exigidos para cada pesquisa científica. Trata-se de um problema complexo de decisão, que envolve a avaliação de um grande número de projetos julgados em vários critérios, em sua maioria, qualitativos. O problema é tratado em duas etapas de seleção. A primeira etapa visa à seleção dos projetos mais satisfatoriamente alinhados aos objetivos da instituição. Os projetos selecionados na primeira etapa servem de entrada para a segunda etapa, onde tais projetos são pontuados segundo os requisitos da pesquisa. Em cada etapa utiliza-se método AHP aplicando a mensuração relativa e absoluta. O AHP mensuração relativa é aplicado para determinar o peso de contribuição dos critérios para atingimento do objetivo geral. A mensuração absoluta serve para avaliar os projetos em cada critério. Finalmente, cada projeto é pontuado com a soma ponderada que consiste no somatório dos produtos do peso relativo de cada critério pela mensuração absoluta atribuída ao projeto no mesmo critério. Para tanto, utilizou-se como procedimento de pesquisa o estudo de caso, baseando-se num estudo exploratório. O trabalho envolveu pesquisa bibliográfica sobre diversos assuntos, tais como, gerenciamento de portfólio de projetos, apoio multicritério à decisão e aplicação dos métodos de apoio multicritério à decisão na seleção de projetos, a fim de conhecer o estado de arte sobre a utilização de tais métodos na seleção de projetos. Assim como, fez uma breve revisão da literatura sobre os critérios de avaliação considerados na pesquisa científica, a fim de ajudar na estruturação dos critérios utilizados na avaliação dos projetos. Também, baseou-se em pesquisa documental e entrevistas não estruturadas, a fim de compreender melhor o problema. A autora concluiu que o modelo proposto contribuiu para melhorar o processo decisório e proporcionou um processo de seleção mais simples e eficaz. O resultado do trabalho permitiu a escolha de projetos baseado na melhor contribuição de tais projetos para o alcance dos objetivos institucionais e para o melhor cumprimento dos requisitos exigidos para cada pesquisa. / This work develops a model for selection of proposals for research projects, basic and applied, with the support of multi-criteria decision method, already exists. How multicriteria method is applied Analytic Hierarchy Process (AHP), combining the relative and absolute measurements, to help managers of IF Fluminense, in the search area. The proposed model aims at prioritizing and selecting projects that may match satisfactorily the purposes of the institution and the requirements demanded for each scientific research. This is a complex decision problem, which involves the evaluation of a large number of projects judged on several criteria, mostly qualitative. The problem is treated in two stages of selection. The first step aims at selecting projects more satisfactorily aligned to the objectives of the institution. The projects selected in the first stage serve as input to the second stage, where such projects are scored according to the requirements of the research. At each step, it uses AHP applying the relative and absolute measurement. The AHP relative measurement is used to determine the weight of contribution of the criteria for achieving the overall goal. The absolute measurement serves to evaluate the projects in each criterion. Finally, each project is scored with a weighted sum consisting of the sum of the products of the relative weight of each criterion for absolute measurement assigned to the project on the same criteria. For this, we used the procedure as a research case study, based on an exploratory study. The work involved bibliographic research on various subjects such as project portfolio management, multicriteria decision support and application of the methods of multicriteria decision support in the selection of projects in order to know the state of art about the use of such methods in selecting projects. Just as, made a brief literature review on the evaluation criteria used in scientific research, in order to help in structuring the criteria utilized in the evaluation of projects. Also drew on documentary research and unstructured interviews in order to better understand the problem. The author concluded that the proposed model contributed to improving the decision making process and provided a simpler and more effective selection. The result of the work allowed the choice of projects based on the best contribution of such projects to achieve the institutional goals and to better compliance with requirements demanded for each research project.

La recherche présentée ici consiste à résoudre le problème de difficulté calculatoire de la fusion d’informations dans le cadre de la théorie de l’évidence de Dempster-Shafer, ainsi que celui de la théorie de Dezert-Smarandache. On présente des études sur l’utilisation d’une variété d’algorithmes d’approximation connus ainsi que sur un nouvel algorithme d’approximation. On présente aussi une étude sur les métriques connues de distance entre corps d’évidence ainsi que deux nouvelles métriques. Enfin, on montre une étude de la possibilité d’employer une méthode d’optimisation afin de sélectionner automatiquement les paramètres d’approximation à l’aide de critères de performance. Mots-clés : Dezert, Smarandache, Dempster, Shafer, Fusion, Fonctions de croyance. / This research is about the solving of the computational difficulty of data fusion in the evidence theory of Dempster-Shafer theory and Dezert-Smarandache theory. We study the use of a variety of known approximation algorithms as well as a new approximation algorithm that we propose. We also study known metrics between bodies of evidence as well as two new metrics that we develop. Finally, we study the possibility of using an optimization method to automatically select the parameters of approximation with performance criteria. Keywords: Dezert, Smarandache, Dempster, Shafer, Fusion, Belief functions.