Thesis (M.S.)--Springfield College, 2004. / Includes bibliographical references.

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abstract: In this thesis, an adaptive waveform selection technique for dynamic target tracking under low signal-to-noise ratio (SNR) conditions is investigated. The approach is integrated with a track-before-detect (TBD) algorithm and uses delay-Doppler matched filter (MF) outputs as raw measurements without setting any threshold for extracting delay-Doppler estimates. The particle filter (PF) Bayesian sequential estimation approach is used with the TBD algorithm (PF-TBD) to estimate the dynamic target state. A waveform-agile TBD technique is proposed that integrates the PF-TBD with a waveform selection technique. The new approach predicts the waveform to transmit at the next time step by minimizing the predicted mean-squared error (MSE). As a result, the radar parameters are adaptively and optimally selected for superior performance. Based on previous work, this thesis highlights the applicability of the predicted covariance matrix to the lower SNR waveform-agile tracking problem. The adaptive waveform selection algorithm's MSE performance was compared against fixed waveforms using Monte Carlo simulations. It was found that the adaptive approach performed at least as well as the best fixed waveform when focusing on estimating only position or only velocity. When these estimates were weighted by different amounts, then the adaptive performance exceeded all fixed waveforms. This improvement in performance demonstrates the utility of the predicted covariance in waveform design, at low SNR conditions that are poorly handled with more traditional tracking algorithms. / Dissertation/Thesis / M.S. Electrical Engineering 2011

Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-07-26T12:54:36Z No. of bitstreams: 1 texto completo.pdf: 791095 bytes, checksum: ddfc15c74f8a185a3574317fa59d5887 (MD5) / Made available in DSpace on 2017-07-26T12:54:36Z (GMT). No. of bitstreams: 1 texto completo.pdf: 791095 bytes, checksum: ddfc15c74f8a185a3574317fa59d5887 (MD5) Previous issue date: 2002-04-01 / O presente estudo teve como objetivo central avaliar técnica e econo- micamente atividades de extração em área montanhosa utilizando-se um trator florestal arrastador com esteiras (Track-Skidder). O estudo foi conduzido em povoamentos de eucalipto de uma empresa florestal do Estado de Minas Gerais, nos quais o sistema de colheita utilizado foi o de árvore inteira, sendo o sistema mecanizado nas suas atividades de corte, extração e traçamento. A avaliação técnica consistiu em detectar e dimensionar os fatores de interrup- ções operacionais e mecânicas, bem como determinar os índices de produti- vidade, eficiência operacional, disponibilidade mecânica e grau de utilização. A avaliação econômica consistiu na determinação dos custos operacionais e da distribuição destes custos. As áreas de estudo foram estratificadas em três níveis de declividades e três níveis de distâncias de extração. De acordo com o estudo, os estratos de menor declividade e distância de extração apresentaram melhor produtividade em relação àqueles de maior declividade e distância de extração. Ao final do período de avaliação, a máquina atingiu disponibilidade viiimecânica de 79% e eficiência operacional de 76%, alcançando com isso um grau de utilização de 60%. Seu custo operacional foi de US$57,00 por hora efetiva, sendo a depreciação e os juros os maiores elementos deste custo. / The present study had as general objective to evaluate technical and economical log extraction activities on mountain area being used a Track- Skidder. The study was developed in eucalyptus plantation property of a Minas Gerais State company that use a mechanized full-tree system. The technical evaluation consisted of an analyzing the operational factors and a mechanical delays, as well as to determine the productivity indexes, operational efficiency and mechanical disponibility. The economical evaluation consisted of the operational costs determination, as well as to determine the distribution of these costs. They were, appraised 1.691 hours of equipment operation and the study areas were stratified in three levels of slope degree and three extraction distances. In agreement with the study the equipment productivity decreases with the increases of the slope degrees and the extraction distances. At the end of the evaluation period the machine reached a mechanical readiness of 79% and an operational efficiency of 76%. Your productivity varied from 17 to 25 m 3 /ha and your operational cost was of US$57,00/ha.

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Orientador: Peter Christian Hackspacher / Coorientador: Eduardo Augusto Campos Curvo / Banca: Julio Cesar Hadler Neto / Banca: Sandro Guedes de Oliveira / Resumo: No presente trabalho foram efetuados estudos sobre o annealing dos traços de fissão em epídoto. Os experimentos foram feitos aquecendo-se o mineral por tempos de 1, 10 e 100 horas, variando a temperatura de 350 a 950°C. Os resultados obtidos foram curvas de annealing tanto para comprimento como para densidade dos traços. Os dados de comprimento dos traços de fissão foram utilizados para obter os parâmetros do modelo de cinética de annealing para o epídoto. O modelo utilizado foi o proposto pelo grupo de Cronologia da UNICAMP. Cálculos baseados nesses ajustes conduziram a uma previsão de zona de annealing parcial (ZAP) entre 218 a 588°C (para 1 Ma). Quando unidos com os dados de annealing para epídoto de Curvo (2005) a zona de annealing parcial prevista varia de 218 a 487°C (para 1 Ma). Esses valores situam a ZAP para tracos de fissão armazenados no epídoto acima da ZAP para a apatita e sobreposta a ZAP do zircão (possuindo, contudo o limite superior da ZAP acima da do zircão). Uma nova curva de ataque químico foi confeccionada com intenção de se utilizar uma menor temperatura do reagente (15°C, 40% HF). Nove pontos de ataque químico foram realizados, em tempos que variam de 30 a 110 minutos. O tempo estabelecido como ótimo foi 80 minutos. Realizou-se também, uma tentativa de datação de uma amostra de fratura localizada nas redondezas do município de Curitiba. A idade aparente encontra da foi de 240±209 Ma / Abstract: This paper presents studies conducted on the annealing of fission tracks in the epidote. The experiments were done by heating the mineral in time periods of 1, 10 and 100 hours, varying the temperature between 350 and 950°C.The results obtained were annealing curves both for length and for density of the fission tracks. The length data of the fission tracks were used to obtain the parameters for the annealing kinetics model of the epidote. The kinetic model for fission track used was the one proposed by the UNICAMP Chronology group. The mathematical calculations based on these adjustments led to a prediction of a partial annealing zone (PAZ) between 218 and 588°C (for 1 Ma).When united with the data for epidote annealing from Curvo (2005) the partial annealing zone varies from 218 to 487°C (for 1 Ma).These values situate the epidote PAZ above the apatite PAZ and having an intersection with the zircon one (presenting however an upper limit superior to the zircon PAZ).A new etching curve was measured aiming at a lower reagent temperature (15°C, 40% HF). Nine etching points were carried out in time periods ranging from 30 to 110 minutes. The optimal etching time was 80 minutes. An attempt to date an epidote fracture sample located near the city of Curitiba was also conducted. The dating provided the apparent age of 240±209 Ma / Mestre

Orientador: Julio Cesar Hadler Neto / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin / Made available in DSpace on 2018-08-05T23:51:48Z (GMT). No. of bitstreams: 1 Curvo_EduardoAugustoCampos_D.pdf: 2296966 bytes, checksum: 8510bd301872383debffac77715c4a2f (MD5) Previous issue date: 2006 / Resumo: Amostras e epídoto a Serra da Mantiqueira foram datadas via o Método a Populações e via o Método o Detector Externo e o valor médio as idades foi (201 ± 15) Ma. As atações apresentaram concordância entre si e os valores das idades se situam entre valores obtidos através e traços e fissão em apatitas (127 ± 10) Ma e zircões (369 ± 15) Ma para amostras coleta as próximas às utilizadas nas datações os epídotos. Também foram efetuados estudos referentes ao annealing os traços e fissão em epídoto.As curvas e annealing em epídoto foram obtidas para os tempos e aquecimento de 10,100,1000 horas e temperaturas entre 340 e 850 ºC. A curva de redução e densidade é mais próxima à proposta por Naeser et al.(1970), que possui temperatura de fechamento estima a de 630 ºC. E a curva e redução e comprimento, também obtida, é a primeira desse tipo a ser medida para o epídoto. O ajuste dos dados e comprimento, realiza o utilizando-se o modelo proposto por nosso grupo, conduziu a uma zona e annealing parcial com limites e 411 e 544 ºC para o intervalo e tempo de 1 Ma. Esses valores a colocam acima das zonas correspondentes para a apatita e para o zircão. Foram realizadas três medidas o fator e eficiência (g), necessário para realizar datações e epídoto via o Método do Detector Externo (MDE). Essas medidas conduziram ao valor 1,06 ± 0,08 (1 s ),que difere os valores de g encontrados para outros minerais (0,684 ± 0,012 para zircão; 0,601 ± 0,023 para titanita e 0,549 ± 0,015 para apatita). O valor e g obtido para o epídoto representa que mesmo em geometria 4 p o mineral registra duas vezes menos traços que a mica muscovita (geometria 2 p) / Abstract: Epidote fission-track ages for samples from the Serra da Mantiqueira were obtaine via both Population an External Detector Methods (EDM) an the mean value was (201 ± 15) Ma. The ages showe internal consistency an are place between those obtained through apatite, (127 ± 10) Ma, and the zircon fission-track dating, (369 ± 15) Ma. Studies concerning the epidote fission track annealing were also performed. The annealing curves were obtaine for annealing times of 10, 100, 100 hours an temperatures ranging from 340 to 850 ºC. The curve of reduce ensity is closest to that proposed by Naeser et al.(1970), which has estimate a closure temperature of 630 ºC (1 Ma). The curve of reduce length,also measured, is the first of this kin obtaine for epidote. The fitting of the length ata, performe by using the model propose by our Group, conducted to a partial annealing zone (PAZ) with borders at 411 an 544 ºC for 1 Ma. These values place epidote PAZ above the estimate PAZ for apatite an zircon. Three measurements of the efficiency factor (g), necessary to perform EDM, were carrie out. Those measurements conducted to the value 1.06 ± 0.08 (1s), which differs from those found for others minerals (0.684 ± 0.012 for zircon; 0.601 ± 0.023 for titanite an 0.549 ± 0.015 for apatite). The value of g obtained to epidote means that even in 4 p geometry the mineral registers two times less tracks than the muscovite mica (2 p geometry) / Doutorado / Física / Doutor em Ciências

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This quality improvement project identified a need to improve patient placement between the Fast Track and the Emergency Department treatment areas of an urban Southern Arizona hospital. The current triage process at this hospital excludes patient past medical history, limiting the information given to triage nurses when assigning patient acuity scores and determining placement in the ED. This project sought to improve patient to nurse communication during the triage interview process by educating nurses to ask a ‘targeted history’ question: a question created to obtain concise past medical history information related to the patient’s chief complaint. This targeted history question was worded as “Have you been treated for [chief complaint] before?” Chart audits were performed to gather quantitative data on patient placement, ESI scores, triage interview times, and nursing compliance rates. Stakeholders were also asked open-ended questions regarding their perceptions of triage and the integration of the targeted history question. These interviews were recorded, transcribed, and coded for common categories. Results show low nursing compliance with asking the targeted history question. However, almost two-thirds of triage notes mentioned some form of past medical history – showing that triage nurses assess for pertinent past medical history without prolonging total triage times. Additionally, stakeholder interviews showed healthcare personnel felt the targeted history question helped with gathering useful information and patient placement, and that past medical history is an important part of triage.

Simulation means running a model of a system with suitable input and observing the corresponding output. Real-time environment simulation is a special kind of simulation used to simulate a control system's environment in real-time. This is done to test the control system before it is used in its real environment. In this project, computer simulation of a certain kind of environments, called track-based systems, is studied and a general model for track-based systems is developed. In this model, track layouts are represented by graphs, which is a flexible and extensible representation and a method for visualizing these layouts is presented. The model also includes representation of switches, sensors, and trains. In addition, a configurable prototype simulator is designed and implemented for a model railroad system. The experience gained in this project is documented in the report and is presented as guidelines for developing simulators for track-based systems.