Dissertations / Theses on the topic 'Projeto RADAM'
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Gamba, Carlos Tadeu de Carvalho. "Contribuição ao estudo da vegetação da porção leste da Ilha de Marajó." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/8/8135/tde-09032010-100455/.
Full textThe maintenance of forest ecosystems in the Amazon is undoubtedly of great importance to the preservation of the planets biodiversity. The utilization and analysis of last generation data about these ecosystems become fundamental for their management. A pioneer project in the 1970 decade, the RADAM project had the objective of gathering information about Amazon natural resources from RADAR images obtained in the band X. The progress in sensor systems based on RADAR (Radio Detection and Ranging) technologies, with the introduction of platforms capable of imaging the surface in bigger wavelengths and in more than one polarization, brought a new perspective in the study area of these resources. This work emerged from the constatation of the need and possibility of obtaining more precise and updated information about the Amazon environment, inclusive considering the speed of the transformations that occur in this region. The primary objective of the study was to analyze the potential of the produced images by Synthetic Aperture Radars (SAR) in bands L and in polarizations HH, HV and VV, for the evaluation of vegetal typology of the east portion of Marajo Island. We understand that this little portion of the Amazon environment gives us a key of classification patterns that can be reapplied in other regions of Legal Amazon, or even in new mapping projects similar to RADAM. The results obtained from radar images analysis and through the study of several propositions for phytogeographic classification evidenced a high potential for the utilization of these resources, as well as the possibility of making progresses in the analysis scale, producing more detailed and comprehensive mappings from the point of view of vegetal classes. The technology to improve the mapping of Amazon region in a more criterious and precise manner has already existed for some time now and is available for national institutions. Making this leap, greatly important to knowledge, preservation and monitoring of what is considered the most important biome in the world only depends on a change in criteria and an updating of the tools that have been used up to this moment.
Goulet, Dennis A., Joseph McMorrow, G. Edward Roberts, and Robert Lynch. "VESSEL TRAFFIC MANAGEMENT SYSTEM A Test Technology Development and Demonstration Project." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607390.
Full textThe Vessel Traffic Management System is a cooperative effort of the Naval Undersea Warfare Center and the Naval Air Warfare Center Aircraft Division, funded by the OSD's Test Technology Development and Demonstration Program. The project is establishing the capability to acquire ship tracking information from numerous sources (GPS and radar target extractors), and combine them into a comprehensive, integrated view of the range safety target area. The consolidated tracking information will be transmitted to range safety vessel personnel and presented on portable display systems to aid in clearing the surveillance area of unauthorized vessels. The communications module is media independent in that positional and image data can be routed via RF modem, cellular phone, Intranet or Internet, singly or in any combination. The software systems for data acquisition, display and control are also platform independent, with the system under development operating under WindowsNT and Windows95. Additionally, the use of Java and VRML tools permits a user to display data (including three dimensional presentations of the data) without requiring the applications software. This system has numerous applications including range safety, commercial vessel traffic management, port authority and services monitoring, and oceanographic data gathering.
MELO, Jefferson Aparecido Arestides de. "Caracterização de uma linha de instabilidade amazônica utilizando radar polarimétrico durante o projeto chuva – Belém." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1419.
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Capes
A linha de instabilidade (LI) Amazônica que atingiu Belém, em 08 de junho de 2008, foi monitorada e analisada por meio de medições de superfície, altitude, satélite e radar. A LI foi identificada, inicialmente, através de imagens do satélite GOES 12. O evento ocorreu durante a campanha de Belém, do Projeto CHUVA, que foi realizada durante o período de 01-30 junho de 2011, durante máxima ocorrência das linhas de instabilidades na região. Através da análise dos dados pluviométricos disponíveis percebe-se que a chuva associada à linha de instabilidade do dia 08 corresponde, aproximadamente, 29% da precipitação acumulada durante todo o experimento. A LI foi monitorada pelo radar meteorológico Banda - XPOL e permitiu a avaliação dinâmica e microfísica do sistema. Esta ultima realizada por meio da classificação de hidrometeoros com as variáveis polarimétricas. As variáveis utilizadas foram: refletividade horizontal (Zh, dBZ), refletividade diferencial (Zdr, dB), fase diferencial específica (Kdp, ° km-1), coeficiente de correlação (ρhv) e, por fim, se realizou a classificação dos hidrometeoros. O sistema apresentou fortes núcleos de refletividade que indicam a região convectiva. Esta parte da LI também é caracterizada por colunas com, relativamente, fortes Zdr e Kdp. A co-localização de colunas de Zh, Zdr e Kdp sugerem que esta é uma zona de elevada concentração de gotas de chuva com um tamanho considerável. A classificação dos hidrometeoros apresentou um resultado bem condizente com o que pode ser observado por outros pesquisadores e com as características microfísicas de outros sistemas convectivos.
A squall line (SL) Amazon, which reached Belém on June 8, 2008, was monitored and analyzed by means of surface measurements, altitude, satellite and radar. The SL was identified initially through the satellite GOES 12 images. The event was during the campaign of Belém, the Chuva Project, which was held during the period 01-30 June 2011, during maximum occurrence of squall line in the region. Through the analysis of available rainfall data we can see that the rain associated with the squall line the day 08 corresponds to approximately 29% of rainfall accumulated during all the experiment. The LI was monitored by weather radar Band - X POL and allowed the dynamic evaluation and microphysics of the system. The latter performed by hydrometeors classification with variables polarimetric. The variables used were: horizontal reflectivity (Zh, dBZ), differential reflectivity (Zdr, dB), specific differential phase (Kdp, ° km -1), correlation coefficient (ρhv) and, finally, was held the classification of hydrometeors. The system showed strong core of reflectivity indicating the convective region. This part of LI is also characterized by columns relatively strong Zdr and Kdp. The co-location columns Zh, Zdr and Kdp suggest that this is an area of high concentration of raindrops with a considerable size. The classification of hydrometeors presented the result well consistent with which can be observed by other researchers and the microphysical characteristics of other convective systems.
Rondani, Bruno. "Projeto, desenvolvimento e construção de um modulador de pulso estado-solido para transmissores pulsados de alta potencia." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261786.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: Descreve-se neste trabalho o desenvolvimento de uma topologia de modulador de pulso estado-sólido e a linha de retardo modular, para aplicação em transmissores pulsados de alta potência que utilizem válvulas de microondas magnetron empregadas comumente em radares de trajetografia, meteorologia e controle de tráfego aéreo. A pesquisa abrange o projeto, desenvolvimento e construção de um modulador de pulso destinado à modernização do transmissor do radar de trajetografia Bearn do Centro de Lançamentos de Foguetes da Barreira do Inferno, Natal -RN. O equipamento desenvolvido fornece pulsos de até 37,5kV e 60A em três modos de transmissão, a saber: monopulso longo, monopulso curto e bipulso. No modo monopulso longo, a largura de pulso é de 1,7µs e nos outros dois modos, 0,85µs. A taxa de repetição dos pulsos é de 585,5Hz. A unidade de modulação de pulso consiste de oito módulos de chaveamento em paralelo, conectados ao primário de um transformador de pulso de razão 1:50. Cada módulo contém dois trechos de linha de retardo e duas chaves estado-sólido e é capaz de gerar pulsos de até 790V e 390A nos diferentes modos de operação. A alimentação da linha de retardo é feita através de um circuito de carga composto por um indutor de alimentação e um circuito de Clipper. O indutor de alimentação faz com que a tensão de carga na linha seja dobrada em relação à tensão contínua presente na saída da fonte de alimentação de entrada, devido à ressonância série criada entre esse indutor e a capacitância total das linhas de retardo. O circuito de Clipper garante a regulação de tensão pulso a pulso e a proteção do modulador contra surto de sobre-corrente na carga e sobre-tensão nas linhas de retardo. Esta topologia foi desenvolvida para melhorar a confiabilidade e facilitar a manutenção dos transmissores de radar com a implementação do conceito de degradação suave (graceful degradation) do modulador de pulso
Abstract: This work describes the development of a modular line-type solid-state pulse modulator topology to be applied in magnetron pulsed power radar transmitters, commonly found on tracking, weather and air traffic management radars. This research includes the design, development and assembling of a pulsed modulator for the Barreira do Inferno Launching Center (CLBI, Natal-RN) Bearn tracking radar upgrade program. The equipment developed provides pulses of 37.5 KV and 60 A in three transmission modes: single long pulse, single short pulse and bipulse. In the single long pulse the pulse width is 1.7 µs and in the other modes 0.85 µs. The pulse repetition frequency is of 585.5Hz. The modulator unit is composed by eight switching modules connected in parallel with the primary windings of a 1:50 ratio pulse transformer. Each module has two pulse-forming network and two IGBT switches and it is capable of handling 790 V and 390 A in the three operational modes. An inductor and a Clipper circuit implement the pulse-forming network charging. The charging inductor allows charging the pulse-forming network with twice the supply voltage since there is a resonance with the total modulator capacitance. The Clipper circuit assures the pulse-to-pulse charging voltage regulation and protects the modulator against load over-current and over-voltage charging. This topology was developed to improve reliability and maintainability of radar transmitters by implementing the graceful degradation (soft failure mode) in the pulse modulator
Mestrado
Sistemas e Controle de Energia
Mestre em Engenharia Elétrica
Brousseau, Christian. "Définition, Réalisation et Tests d'un radar VHF Multifréquence et Multipolarisation - Projet MOSAR." Phd thesis, Université Rennes 1, 1995. http://tel.archives-ouvertes.fr/tel-00085136.
Full textCe système dénommé M.O.S.A.R. (Maquette Orientée pour un Système d'Analyse de Résonances) a pour objectif la mesure des sections efficaces radars d'avions dans cette gamme de fréquence, afin de fournir l'ensemble des connaissances qui permettront de concevoir un futur radar opérationnel, destiné à la détection et à l'identification des cibles aériennes.
Dans un premier temps, nous définissons les caractéristiques principales du système, telles que la largeur de l'impulsion émise, la période de récurrence, le nombre de fréquences utilisées, ... . Ensuite, nous construisons un radar à impulsions, monostatique, cohérent, commandé par ordinateur, capable de mesurer et d'enregistrer les signaux rétrodiffusés par des avions. Ce système emploie deux réseaux d'antennes différents pour l'émission et la réception, chacun de ces réseaux utilisant respectivement quatre antennes log-périodiques dipolaires. Les informations relatives aux cibles (amplitude, phase et fréquence Doppler) sont ensuite extraites par une analyse spectrale non linéaire haute résolution.
Nous évaluons les performances du radar et précisons les limites du système. Enfin, des résultats expérimentaux sont présentés et confirment les choix dans la définition et la réalisation du radar.
Crockett, Donald E., David V. Arnold, and Michael A. Jensen. "THE DESIGN AND CONSTRUCTION OF A C-BAND RAIL-SAR AND AN S-BAND DOPPLER RADAR." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607366.
Full textTo help students learn the principles of microwave engineering and electromagnetic theory, labs were developed in which the students built a rail-synthetic aperture radar(SAR) and a Doppler radar. These labs gave the students practical experience in the paper design, simulation, construction, testing, and debugging of RF circuits. This paper includes a description of the design, physical construction, the basic operation, and the results from these projects.
Armellini, Fabiano. "Projeto e implementação do controle de posição de uma antena de radar meteorológico através de servomecanismos." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-09052007-174120/.
Full textA classical radar antenna is basically composed of a primary source mounted at the focal point of a parabolic reflector. The illumination rule is established so that the desired beam-shape is attained, as precisely as possible. The physical motion of the set guarantees the coverage of the desired volume of exploitation. The actual text studies the design and development of a servomechanism capable of supporting and positioning a radar antenna, within well-defined parameters and restrictions. The aims of the dissertation are: determination and study of relevant factors for the specification of a control system design for the positioning of a servodriven radar antenna; presentation of a servo-driven positioning control system design proposal; proposal of a consistent theoretical structural model of the radar antenna set for the purpose of dynamic simulation and modal analysis of the structure and; presentation of the implementation of the proposed control system in a real Engineering design project: a servo-driven weather radar antenna. The control propose was successfully employed at the Engineering Model of the Doppler weather radar RMD700S-1M, developed by the trust Omnisys/Atech, installed and operant at Mogi das Cruzes/SP. The text presents, in a structured form, all relevant factor that must be taken into account in the development of such design. The conclusions drawn at the end of the dissertation are considerations regarding the design, which point out faults and weak points of the development.
MARZOUG, MONGI. "Etude d'un radar spatial pour la mesure des precipitations : application au projet b.e.s.t." Paris 7, 1989. http://www.theses.fr/1989PA077270.
Full textWebster, Justin Mark. "The development of a Radar Digital Unit for the SASARII project." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/5085.
Full textThis dissertation describes the design, implementation and testing of the Radar Digital Unit (RDU), a subsystem for the South African Synthetic Aperture Radar II (SASARII). The SASARII is an airborne demonstrator SAR system for a spaceborne SAR and Unmanned Aerial Vehicle (UAV) imaging radar. The demonstrator system parameters, such as bandwidth, reflect the desired spaceborne SAR parameters.
Harriss, Harriet E. "Architecture Live Projects : acquiring and applying missing practice-ready skills." Thesis, Oxford Brookes University, 2014. https://radar.brookes.ac.uk/radar/items/7504258d-d3e9-4ee5-8350-ff0028035e3a/1.
Full textDuplat, Daniel Nascimento. "Projeto de uma rede de alimentação de baixas perdas para um arranjo de antenas utilizando linhas de fita." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259179.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: Este trabalho trata do desenvolvimento teórico e computacional de um arranjo de antenas de grande comprimento elétrico com grande aplicabilidade em radares e sistemas de sensoriamento que utilizam distribuições de potência específicas. São abordados a síntese do padrão de radiação do arranjo, a escolha do número de antenas e o desenvolvimento da rede de alimentação do sistema. De maneira geral, o projeto pode ser dividido em duas partes: cálculo dos parâmetros do arranjo de antenas e desenvolvimento do sistema de alimentação do arranjo. Na primeira parte, a partir da escolha de um diagrama de radiação específico, determina-se o número de antenas e a amplitude e fase de campo eletromagnético que cada antena do arranjo deve receber a fim de gerar o diagrama de radiação necessário. Para tal, adota-se uma distribuição de amplitudes do tipo Hamming adaptada às especificações do projeto e uma distribuição de fase uniforme. Na segunda parte, desenvolve-se um sistema de alimentação para o arranjo de antenas que possibilita a distribuição da energia obedecendo à distribuição de amplitude e fase do campo determinada na fase anterior. O sistema proposto utiliza tecnologia de linhas de fita montada num substrato de poliestireno expandido, que agrega não somente baixas perdas ao sistema de distribuição, mas também baixos custo e peso. É possível verificar, portanto, que o desenvolvimento de um arranjo de antenas com comprimento elétrico muito maior do que o comprimento de onda de operação é um projeto que agrega conhecimentos não somente de antenas e suas características, mas também o conhecimento de arranjos de antenas e ponderação de amplitudes, bem como seus efeitos no diagrama de radiação do arranjo. Contudo, o desenvolvimento deste sistema implica na utilização de sistemas de guiamento eletromagnético que possibilitem a transmissão de energia agregando baixo custo, baixas perdas, e alta eficiência.
Abstract: This work deals with theoretical and computational development of an antenna array of large electrical length with wide application in radar and sensing systems using specific power distribution. The project describes the process from the synthesis of radiation pattern, the choice of the number of antennas and the development of the power supply system. Overall, the project can be divided into two parts: calculation of parameters of the antenna array and development of the power system. In the first part, the number of antennas and the amplitude and phase of the electromagnetic field that each antenna needs are calculated to generate the required radiation pattern. To this end, we adopt a distribution of amplitudes of Hamming type (Hamming weighting) adapted to the project specifications and a uniform phase distribution. In the second part, the power system to the antenna array is developed. This supply system enables the distribution of energy obeying the distribution of amplitude and phase of the field specified in the previous part. The proposed system uses striplines mounted on a substrate of expanded polystyrene, which combines low-losses, low-cost and lightweight.
Mestrado
Telecomunicações e Telemática
Mestre em Engenharia Elétrica
Buguet, Magalie. "Activité d'éclairs et paramètres physiques issus de l'observation radar dans les orages : application au projet HyMeX." Phd thesis, Université Paul Sabatier - Toulouse III, 2012. http://tel.archives-ouvertes.fr/tel-00761486.
Full textCiuk, Sylwia. "Climbing out of organisational depression : culture change project after a toxic leadership episode." Thesis, Oxford Brookes University, 2011. https://radar.brookes.ac.uk/radar/items/fb9e26b1-31a7-4acd-a9cb-f1e2acd8a457/1/.
Full textEl, Hajj Chehade Bassam. "Traitements tomographiques pour la caractérisation de forêts tropicales à l'aide des données SAR polarimétriques." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S081.
Full textForested areas cover one third of earth's land surface and their contribution in the storage of carbon is decisive. Current studies show that the accurate knowledge of global forest biomass is necessary for the prediction of climate changes on the planet. In this context, the BIOMASS project is selected by the European Space Agency (ESA) as Phase A of the 'Earth Core Mission' program. This highly innovative mission consists of the use of a polarimetric imaging radar operating at P band (435 MHz) for the measurement of forest biomass. The current definition of the mission provides a three-dimensional imaging (3-D) of the forest with both tomographic and multi-pass interferometric modes. In the framework of this project, this PHD thesis aims to develop a novel strategy for the remote sensing of the biomass within the dense tropical forests by processing on multi-baseline P-band Synthetic Aperture Radar (SAR) data. An original approach combines the possibilities of 3-D exploration tomography and the Random-Volume- over-Ground (RVoG) model established and verified with PolInSAR technique (Polarimetric Interferometry SAR). The forested environment can be accurately described by a polarimetric multi-layer model (soil and a succession of vegetationlayers). A multi-baseline generalization of the RVoG model involves a certain number of parameters which must be estimated from radar observation data by using High- Resolution spectral estimation tomographic methods. Thereby, a cartography of the forest and its underlying ground can be made using tomographic data. Furthermore, the capacity of the tomographic techniques on 3-D imaging allows an estimation of the vertical distribution of the backscattered power. Thus, an accurate biomass information may be extracted from the power measured at a domain adapted to the canopy layer. However, this measured backscattered may be strongly affected by the ground echo due to the double bounce contribution. The main challenge of this thesis is to establish a novel biomass estimator related to a backscattered powermeasured with a polarimetric channel and at a vertical domain, both adapted to the canopy layer. The proposed algorithms of forest cartography and biomass estimation are applied and validated on Airborne P-band SAR data realized on the TROPISAR campaign in French Guyana
Schröpfer, Veronika. "Social network analysis of knowledge transfer in sustainable office building projects in the UK and Germany." Thesis, Oxford Brookes University, 2013. https://radar.brookes.ac.uk/radar/items/bbc84754-c388-44f4-96c8-7d07c56674ca/1/.
Full textSilva, Maurício Weber Benjó da 1980. "Superfícies seletivas em frequência - FSS : concepção e projeto de absorvedores planares de micro-ondas para aplicação em WLAN, WIMAX e radar." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261243.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: Neste trabalho, as diferentes propriedades de superfícies seletivas em frequência, FSS - Frequency Selective Surfaces, são analisadas. As FSS são estruturas planares com células periódicas e podem ser classificadas como uma classe de metamateriais. Para tanto, o mecanismo de trabalho dessas estruturas foi extensivamente estudado, e um método próprio, baseado no modelo de circuito equivalente em conjunto com simulações de onda completa foi proposto. A ferramenta desenvolvida é útil para uma análise preliminar rápida de FSS, a qual foi utilizada para criar uma base de dados de elementos conhecidos na literatura. Diferente dos modelos de análise clássicos, a modelagem analítica proposta, que é uma das principais contribuições do trabalho, usa um simples algoritmo para aproximar a resposta de superfícies seletivas em frequência com geometrias arbitrárias, para incidências normal e oblíqua e para substratos com quaisquer espessuras. Nesse sentido, após a simulação eletromagnética da estrutura, é possível computar a resposta de uma FSS com diferentes parâmetros sem o consumo de tempo das simulações de onda completa. O modelo usa as características peculiares de superfícies de alta impedância, HIS - High Impedance Surface, que dentro de determina faixa comporta-se como condutor magnético perfeito, PMC - Perfect Magnetic Conductor, enquanto no restante da banda tem comportamento de um condutor elétrico perfeito, PEC - Perfect Electric Conductor, para sintetizar absorvedores finos e planares de micro-ondas. As estruturas, compostas de superfície seletiva em frequência resistivas sobre um substrato dielétrico aterrado, são projetadas visando aplicação em diferentes faixas de frequência de absorção e diferentes larguras de banda. Na faixa de 5,5 GHz, objetivou-se satisfazer as especificações dos sistemas WIMAX, WLAN, com os padrões IEEE 802.11a, bem como sistemas de radar, enquanto sinais de outras faixas podem trafegar com atenuação mínima ou nula. Para a faixa mais elevada, projetou-se uma estrutura que oferece absorção sobre a faixa de frequências de 10 GHz a 18 GHz, que pode ser empregada visando aplicações na banda-X e banda-Ku. O método de modelagem para a FSS e para os absorvedores propostos foi validado fisicamente através de montagens experimentais e instrumentação, especialmente desenvolvidas para estas estruturas. Os protótipos dos absorvedores fabricados são extremamente finos e foram medidos por meio de setups de medida em campo aberto e em câmara anecóica. As estruturas projetadas mostraram excelente desempenho para as faixas medidas, mantendo refletividade tipicamente abaixo de -10 dB ao longo de toda a banda. A metodologia desenvolvida nesta pesquisa pode ser ampliada para diferentes faixas de frequências, larguras de banda e aplicações
Abstract: In this work, the different properties of frequency selective surfaces - FSS are analyzed. Frequency selective surfaces are planar structures with periodic cells and can be classified as a kind of metamaterials. To this end, the working mechanism of these structures has been extensively studied, and a proper method based on the equivalent circuit model in conjunction with full-wave simulations was proposed. The developed tool is useful for a fast preliminary analysis of FSS, which was used to create a database of known elements presented in the literature. Unlike of classical analysis model, the proposed analytical modeling, which is one of the main thesis contributions, uses a simple algorithm for approximate the response of frequency selective surfaces with arbitrary shape, for normal and oblique incidence and for substrates with all thicknesses. In this sense, after the electromagnetic simulation of the structure, it is possible to compute the response of an FSS with different parameters without the time consuming full-wave simulations. The model uses the unique characteristics of High-Impedance Surfaces - HIS, which for certain frequency range, behaves as Perfect Magnetic Conductor - PMC, while outside this band behaves as a Perfect Electric Conductor - PEC, for synthesizing thin planar microwave absorbers. The structures, comprising resistive frequency selective surfaces over a grounded dielectric substrate, are designed aiming different absorption frequency bands and different bandwidths. In the 5.5 GHz frequency range, the aim was to satisfy the specifications of WiMAX, WLAN systems, in view of the IEEE 802.11a standards, as well as radar systems, while signals from other bands can travel across with zero or minimal attenuation. To the highest range, the designed structure provides absorption over 10 GHz to 18 GHz frequency range, and can be applied to the X- and Ku- band. The modeling method for the FSS and the proposed absorbers was physically validated through experimental setups and instrumentation, especially developed for these structures. The prototype of the fabricated absorbers are extremely thin and were characterized by using free space and anechoic chamber measurement setups. The designed structures showed excellent performance for measurements ranges, with reflectivity typically below -10 dB over the entire band. The methodology developed in this research can be extended to different frequency bands, bandwidth and applications
Doutorado
Eletrônica, Microeletrônica e Optoeletrônica
Doutor em Engenharia Elétrica
Perera, Dinesh Sirimal. "Design metrics analysis of the Harris ROCC project." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/935930.
Full textDepartment of Computer Science
Nanayakkara, Leyon. "Site layout : how it is perceived to affect productivity in public sector construction projects in Sri Lanka." Thesis, Oxford Brookes University, 2012. https://radar.brookes.ac.uk/radar/items/2173bf32-65f5-42be-bb6f-4941b1bd187d/1/.
Full textBrousseau, Christian. "Définition, réalisation et tests d'un radar V. H. F. Multifréquence et multipolarisation projet M. O. S. A. R." Rennes 1, 1995. http://www.theses.fr/1995REN10106.
Full textMiao, Qun. "Fine-scale vertical structure of clear-air echoes during the International H₂O Project as detected by an airborne Doppler radar." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1296094731&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Full textCoudrat, Camille N. Z. "Species distribution, abundance and conservation in Nakai-nam Theun National Protected Area, Central-Eastern Laos : implications for future local wildlife conservation project." Thesis, Oxford Brookes University, 2013. https://radar.brookes.ac.uk/radar/items/4ac18953-4f42-45da-b3c7-71853aecb201/1/.
Full textBignelli, Pedro Alberto. "Avaliação dos dados de radar (SAR) do Projeto SAREX'92 e ERS-1 em mapeamento geológico na região de Salobo, Província Mineral de Carajas." Instituto Nacional de Pesquisas Espaciais (INPE), 1994. http://urlib.net/sid.inpe.br/iris@1912/2005/07.20.04.31.
Full textThis work has focussed on the evaluation of airbone (SAREX'92) and orbital (ERS-1) SAR data in the geological mapping of the Salobo area, Carajás Mineral Province (Brazilian Amazon Region). The main objectives of the investigation have ancopassed visual and digital analysis of the SAR data in the lithological discrimination and structural mapping taking into account distinct sensor parameters and acquisition data geometry (polarization, resolution, incidence and azimuth angles and look direction). The research has also aimed at providing insights for the geological knowlegde of the Salobo area and for the RADARSAT evaluation in this "difficult" tropical rain forest environment. The test-site is inserted in the Itaiúnas Belt, a wide shear zone with probable Archean age and copper deposits, located in the northwest border of the Carajás Mineral Province. The results have shown that the most important radar parameters were incidente and azimuth angles and look direction. Airborne radar data from SAREX proved to be a valious tool for geological mapping at a semi-detailed scale. ERS-1 data has presented distortion problems related to "layover" and "foreshortening" affects in the high relief area. However, geological information could be extracted in the low relief regions. Digital enhancement techniques proved to be important in the extraction of information with geological meaning from both SAR dataset.
Nunes, Benilton Medeiros. "A influ?ncia do modelo de triplice h?lice no grau de maturidade de inova??o: um estudo de caso em empresas participantes do projeto PR?-INOVA/NAGI no estado do RIO GRANDE DO NORTE." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15089.
Full textPublic investments in the development of innovation in the country, either through the rigging of public universities, either through public announcements of the promotion, increased dramatically in recent years. To analyze the efficiency and effectiveness of the use of public resources is especially in times of austerity, essential for the development of a country. In this context, this research aims to identify the influence of public investments to promote innovation in the degree of maturity of innovative companies in the state of the RN. Another goal is to identify the regional influence from the installation site - capital or countryside, in the performance of the companies studied in the degree of innovation. The theoretical basis of the understanding of the scope of the concept of innovation and its determination for the purposes of this study. Typology, degree of innovation, evaluation methodologies and mechanisms to support innovation : Still on the theme of innovation additional concepts that help the reader to a greater understanding, such as are presented. Following is approached conceptualization of the triple helix, highlighting the concepts advocated by Etzkowitz and Leydesdorff, Salomon and Silva and Ipiranga, Freitas and Paiva, among others. With regard to methodological aspects, we propose a descriptive, exploratory and explanatory research quantitative and qualitative approach with the target audience group of companies served by INOVA PRO- NAGI design - multi-institutional action from a public resource called FINEP promotes the development of innovative companies in the State of Rio Grande do Norte - in 2013. The research should provide reflection and understanding of the influence of public investment in innovation, which by means of qualitative predictive variables associated with quantitative method to explain which variables are significant variations in the degree of maturity of enterprises studied
Os investimentos p?blicos no desenvolvimento da inova??o no pa?s, quer por meio do aparelhamento das universidades publicas, quer por meio de editais de fomento, cresceram vertiginosamente nos ?ltimos anos. Analisar a efici?ncia e efic?cia da aplica??o dos recursos p?blicos ?, sobretudo em tempos de austeridade, primordial para o desenvolvimento de um pa?s. Neste contexto, a presente pesquisa tem como objetivo identificar a influ?ncia dos investimentos p?blicos de fomento ? inova??o no grau de maturidade de inova??o de empresas instaladas no Estado do RN. Objetiva-se ainda identificar a influ?ncia regional, a partir do local de instala??o capital ou interior, no desempenho das empresas estudadas no grau de inova??o. A fundamenta??o te?rica parte da compreens?o da dimens?o do conceito sobre a inova??o e a sua defini??o para efeitos deste trabalho. Ainda sobre a tem?tica da inova??o s?o apresentadas conceitua??es adicionais que auxiliam o leitor a uma maior compreens?o, tais como: tipologia, graus de inova??o, metodologias de avalia??o e mecanismos de apoio ? inova??o. Na sequ?ncia ? abordada a conceitua??o sobre a tr?plice h?lice, ressaltando os conceitos preconizados por Etzkowitz e Leydesdorff, Salomon e Silva e Ipiranga, Freitas e Paiva, entre outros. No tocante aos aspectos metodol?gicos, prop?e-se uma pesquisa descritiva, explorat?ria e explicativa de abordagem quanti-qualitativa, tendo como p?blico-alvo o grupo de empresas atendidas pelo projeto PR?-INOVA NAGI a??o multiinstitucional que a partir de recursos de uma chamada p?blica da FINEP promove o desenvolvimento da inova??o em empresas do Estado do Rio Grande do Norte no ano de 2013. A pesquisa dever? proporcionar reflex?es e compreens?o da influ?ncia dos investimentos p?blicos em inova??o, que por meio de vari?veis qualitativas preditivas, associada ao m?todo quantitativo explicar quais vari?veis s?o significativas na varia??o do grau de maturidade em inova??o das empresas estudadas
Štysová, Anna. "Realizace autorského projektu: Role autora, kurátora, instituce, grafického designéra." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2014. http://www.nusl.cz/ntk/nusl-232440.
Full textKonětopský, Filip. "Mezinárodní auditorské standardy." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-75951.
Full textBermejo, J. P. "A very high resolution X- and Ku-band field study of a barley crop in support of the SWINTOL Project." Thesis, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10259.
Full textTeixeira, Flávio de Abreu. "Análise relativa da humidade disponível à superfície no concelho de Lagoa por deteção remota multiespectral - projeto." Master's thesis, 2020. http://hdl.handle.net/10400.1/15315.
Full textWater is essential to sustain life on Earth, used for consumption, food production, industrial activities and others. This vital resource is under pressure from a growing population, unequal distribution of resources and impacts of climate change, with agriculture being among the most vulnerable sectors. The use of new technologies combined with scientific research, may help to develop methodologies for observation and monitoring, which help to avoid wasting valuable water resources. The project developed is essentially aimed at the collection, processing and analysis of radar images from the Sentinel-1 satellite (SAR), which allow the visualization of the evolution of the relative moister of the soil on a monthly basis, at the margins of hydrographic basins and in agricultural fields, as well as the effect of changing the vegetation cover, particularly after major fires, in the period between February 2016 and February 2019. The study area focused on the Municipality of Lagoa, also covering part of the hydrographic basin of the Arade River and some surrounding areas, in order to be able to observe and analyze the various phenomena that could arise, resulting from the data processing. In the absence of a consensual processing strategy, it was necessary to adopt a design based on theoretical concepts, after evaluating the coherence of the results. The analysis was intended to evaluate the sensitivity of the SAR system, in relation to water and moisture. To this end, a focus was given to the practice of farmers in the Municipality of Lagoa, with regard to the use of water in rice crops, at different times of the year, also observing the susceptibility of the system to the variation of the water level of reservoirs, the effect of the tides and after big fires. To present the results, a Websig system was developed, with 100% open source tools, such as Postgresql, Postgis, Geoserver, Node.js and OpenLayers3.
KRISTKOVÁ, Markéta. "Udržitelnosti projektů spolufinancovaných Evropskou unií." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-200785.
Full textŠestáková, Kristýna. "Projekty mediálních institucí v oblasti rozvoje a podpory mediální gramotnosti." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-404596.
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