O objetivo deste trabalho é apresentar uma metodologia de cálculo da distribuição de correntes e dos campos eletromagnéticos e tensões induzidas associadas em estruturas atingidas diretamente por descargas atmosféricas que, agregada à filosofia geral de compatibilidade eletromagnética (CEM), constitua uma abordagem inovadora e abrangente quando comparada às recomendações de proteção contra descargas atmosféricas atuais. Propõe-se, portanto, desenvolver uma metodologia que: · Constitua uma ferramenta de auxílio nas tomadas de decisões, aplicável desde a etapa de definição da arquitetura da estrutura e do leiaute dos equipamentos até a definição final da configuração do sistema de proteção contra descargas atmosféricas (S.P.C.D.A); · Possibilite a implementação de uma filosofia de proteção dos equipamentos e sistemas elétricos e eletrônicos contra descargas atmosféricas na qual se integre as recomendações tradicionais às necessidades atuais relacionadas à área de compatibilidade eletromagnética; · Seja abrangente e com grau de precisão satisfatório, quando comparadas com as recomendações atuais, com possibilidade de exploração dos valores das grandezas elétricas envolvidas no domínio do espaço e do tempo, e · Apresente simplicidade na implementação em computadores pessoais. / The main purpose of this work is to present a suitable method for calculating the current distribution, the electric and magnetic field, and the induced voltage on electric circuits regarding a structure directly struck by lightning. Moreover, when the method is used together with the electromagnetic compatibility (EMC) requirements, it can provide the designer with a new and helpful methodology meeting the recent aspects or the state of the art on lightning protection systems (L.P.S). Thus, a methodology is proposed, which provides the L.P.S. design team with: · The availability to take technical decisions in all steps of the project, from the definition of the architecture of the structure to the definition of the best layout of L.P.S.; · Recommendations to achieve the EMC of the electric and electronic system, in addition to the traditional ones; · Reliable numerical results concerning simulations in the space and time-domain, and · Simple implementation in personal computers.

Work Domain Analysis (WDA) and task analysis are methods that can be used to develop complex systems that support human operators. Task analysis can be used to describe the nominal tasks of many complex safety critical systems which are also highly proceduralized. However, complex systems may require human operators to have a greater understanding of the system's dynamics than can be obtained from procedures derived from a task analysis. This is particularly true when off-nominal events occur, for which there is no procedure. By concentrating on the constraints in the work domain instead of tasks, work domain analysis can complement task analysis by supporting operators during off-nominal events that do not have any predescribed procedures. The goal of this study was to use WDA and two forms of task analysis to derive interface and procedure modifications for a new aviation concept called interval management. Interval management is a new concept whose goal is to increase runway throughput by enabling aircraft to achieve a precise interval behind a lead aircraft. This study used data from a human-in-the-loop study conducted at NASA Langley Research Center to develop a Hierarchical Task Analysis (HTA), Control Task Analysis (CTA), and WDA. The HTA was used to describe a nominal set or procedures, the CTA was used to describe strategies pilots could use to make decisions regarding the IM operation, and the WDA was used to determine representations and procedures that could convey complete and accurate knowledge of interval management to the flightcrew.

Not available / text

Thesis (M.App.Sc.) - Carleton University, 2005. / Includes bibliographical references (p. 79-86). Also available in electronic format on the Internet.

Thesis (M.App.Sc.) - Carleton University, 2007. / Includes bibliographical references (p. 123-128). Also available in electronic format on the Internet.

Thesis (MEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: This work in this study covers a powerful technique to derive propagation and scattering information in an expedient fashion. Expedient because time-domain (TD) data gathers a broad spectrum in a single transmitted pulse. TD has been criticised because of a lack of dynamic range, which has now been overcome by the direct sampling system, RATTY and RTA. This study focuses on the investigation of a TD metrology system, to assist with the characterisation of MeerKAT systems. The elementary components of the system include a fast-rising impulse generator that was coupled with an impulse radiating antenna (IRA). The system was calibrated and tested before practical measurements and preliminary testing in the Karoo were done. For TDmetrology a larger bandwidth accelerates measurements without the loss of accuracy. The pulse generator’s (PG’s) fundamental components are an avalanche transistor and a step recovery diode (SRD), to sharpen the leading edge of the pulse. Improving the rise-time of a pulse increases its bandwidth in the spectrum. The external circuitry around these components is pivotal and it determines the shape, amplitude and rise-time of the pulse. In the course of the investigation, the general circuitry around the PG was improved to obtain the best possible pulse for measurements inside a reverberation chamber (RC) and for measurements in the Karoo. In light of this, a second and third PG source were obtained. For measurements in the Karoo, a larger amplitude pulse was required to increase the spectral content and this is essential for propagation measurements over distance and the shielding effectiveness (SE) of structures. Stacking avalanche transistors allow larger amplitude pulses and it improves the dynamic range of the spectrum. A PG incorporating stacked avalanche transistors, was designed, built and measured to assist with RC and small-scale field measurements in the Karoo. The third PG was bought for the practical measurements in the Karoo. The PG produces kilovolt pulses with pico-second rise-times that extend the spectral range of the current PGs at our disposal. With these PGs, an antenna is required for the radiation of impulse-like transients. The IRA is a high-gain large-bandwidth antenna. The IRA consists of a parabolic reflector, conical-plate transmission lines that are terminated through resistors onto the dish, and a feeding balun. The IRA design was thoroughly discussed and a first model for metrology was designed, measured and optimised. The IRA was also simulated with computation software code, FEKO. Before deployment of theTDsystem, calibration and characterisation measurements are required. The measuring devices used within this study were sampling oscilloscopes and direct sampling systems. The limitations of each device were explored and are discussed. The final measurements that were conducted contribute to work related to the SKA. This incorporated antenna pattern calibration, propagation over distance and the SE of a berm built from Karoo soil. The system investigated the propagation attenuation over the Karoo soil and vegetation, with great promise. A broad spectrum was measured over a few kilometres and compared to free-space loss. The SE of the berm covered the same spectral bandwidth. In this measurement, scattering effects and knife-edge diffraction were observed. / AFRIKAANSE OPSOMMING: Die werk in hierdie studie dek ’n kragtige tegniek wat gebruik kan word om die voortplanting en die verstrooiingsinligting van elektromagnetiese golwe op ’n voordelige manier af te lei. Dit is voordelig, want tydgebieddata versamel ’n wye spektrum in ’n enkele oordraagbare puls. Tydgebied is in die verlede baie gekritiseer omdat dit ’n dinamiese reikwydte kortkom en dit is nou oorwin deur die direkte steekproefnemingstelsel, RATTY en RTA. Hierdie studie fokus op die ondersoek van ’n tydgebiedmetingssisteem en dit help met die karakterisering van MeerKAT sisteme. Die elementêre komponente van die sisteem bestaan uit ’n vinnig-stygende impulsgenerator wat gekoppel is aan ’n impulsuitstralende-antenna (IRA). Die sisteem is gekalibreer en getoets voordat praktiese metings en toetse in die Karoo uitgevoer kon word. Vir tydgebiedmetings versnel ’n groter bandwydte die metings sonder om die akkuraatheid daarvan te beïnvloed. Die pulsgenerator se fundamentele komponente is ’n stortvloedtransistor en ’n stap-herstel diode (SRD) wat die voorpunt van die puls verskerp. Die eskterne stroombaan rondom hierdie komponente is noodsaaklik en dit bepaal die vorm, amplitude en die stygtyd van die puls. Deur die loop van hierdie ondersoek is die algemene stroombaan rondom die puls verbeter, om die beste moontlike puls vir metings binne in die weerkaatsingskamer en vir metings in die Karoo, te verkry. Na aanleiding van dit is ’n tweede en derde pulsgenerator bron verkry. Vir die metings in die Karoo is ’n puls met ’n groter amplitude vereis om die spektrale inhoud te vermeerder. Dit is noodsaaklik vir elektromagnetiese golf voortplantingsmetings oor afstand asook die beskermings effektiwiteit (SE) van die strukture. Stapel-stortvloed transistors skep pulse met groter amplitudes en dit verbeter die dinamiese reikwydte van die spektrum. ’n Pulsgenerator wat gestapelde stortvloedtransistors insluit is ontwerp, gebou en gemeet om te help met metings in die weerkaatsingskamer en kleinskaal veldmetings in die Karoo. Die derde pulsgenerator is gekoop vir praktiese metings in die Karoo. Die pulsgenerator vervaardig kilovolt pulse met pikosekond stygtye, wat die reikwydte van die spektrum van ons huidige puls uitbrei. Hierdie pulsgenerators vereis ’n antenna vir die uistraling van impulsagtige seine. Die IRA is ’n hoë-wins, groot-bandwydte antenna. Die IRA bestaan uit ’n paraboliese weerkaatser, konieseplaat transmissielyne wat deur weerstande op die skottel getermineer word, asook ’n voedings "balun". Die IRA ontwerp is deeglik bespreek en ’n model is ontwerp, gemeet en verbeter. Die IRA is ook gesimuleer met behulp van ’n rekenaarsagtewareprogram, FEKO. Voordat die tydgebiedsisteem benut kan word, moet dit gekalibreer word en karakteriseringsmetings moet ook daarmee uitgevoer word. Die meetinstrumente wat in hierdie studie gebruik is, is steekproefneming-ossilloskope en direkte steekproefneming-sisteme. Die tekortkominge van elke instrument is ondersoek en bespreek. Die finale meting wat uitgevoer is, dra by tot die werk wat geassosieer word met die SKA. Dit behels antennapatroonkalibrasie, voortplanting van elektromagnetiese golwe oor afstand en die SE van ’n "berm"wat gebou is uit Karoo-grond. Hierdie sisteem is gebruik om die voortplantings-verswakking oor die Karoo-grond en plantegroei te ondersoek en dit lyk baie belowend. ’nWye spektrumis oor ’n paar kilometer gemeet en dit is met wrywinglose ruimte vergelyk. Die SE van die "berm"het dieselfde spektrale bandwydte gedek. In hierdie meting is verstrooiingseffekte en mespunt-diffraksie waargeneem.

Submitted by Eliana Katia Pupim (katiapupim@tupa.unesp.br) on 2018-06-28T13:30:07Z No. of bitstreams: 1 pupim_ek_do_mar.pdf: 5107031 bytes, checksum: 8847c7bb4b7bf86bf7add53a1e945d29 (MD5) / Approved for entry into archive by Satie Tagara (satie@marilia.unesp.br) on 2018-06-29T14:31:46Z (GMT) No. of bitstreams: 1 pupim_ek_dr_mar.pdf: 5107031 bytes, checksum: 8847c7bb4b7bf86bf7add53a1e945d29 (MD5) / Made available in DSpace on 2018-06-29T14:31:46Z (GMT). No. of bitstreams: 1 pupim_ek_dr_mar.pdf: 5107031 bytes, checksum: 8847c7bb4b7bf86bf7add53a1e945d29 (MD5) Previous issue date: 2018-05-30 / Não recebi financiamento / A profissão do Engenheiro de Biossistemas ainda é recente no Brasil, sendo que a implantação do primeiro curso superior ocorreu em 2009. Em função da sua afinidade com a Engenharia Agrícola, os órgãos reguladores da profissão de Engenharia ainda não reconhecem seus egressos como Engenheiros de Biossistemas, mas sim os intitulam de Engenheiros Agrícolas com especificidade em Biossistemas. Diante desta problemática, o objetivo desta pesquisa foi traçar paralelos entre os campos científicos das Engenharia Agrícola e Engenharia de Biossistemas, de forma a permitir a elaboração de subsídios que levem à compreensão dos pontos de proximidade e de distanciamento dos domínios estudados. O método utilizado para alcançar o objetivo proposto foi a Análise de Domínio, optando pelas abordagens com Estudos Históricos e Estudos Bibliométricos, com a adoção da análise de conteúdo de Bardin e a elaboração de nuvens de palavras para as analogias. Os resultados permitiram compreender que sim, há vários momentos em que a Engenharia de Biossistemas e a Engenharia Agrícola são análogas, como na organização e na duração e integralização dos cursos, porém quanto aos conteúdos disseminados oferecem uma variação quanto aos temas relacionados à Zootecnia e Ciências Biológicas, sendo que enquanto a Engenharia de Biossistemas os trata como temas centrais, a Engenharia Agrícola os tem como temáticas periféricas. A produção científica também tem suas características peculiares, havendo periódicos que publicam apenas o conteúdo de uma ou de outra Engenharia, contudo há em número maior os periódicos que publicam as duas Engenharias concomitantemente, demonstrando que apesar de suas especificidades, há muito em comum na Engenharia de Biossistemas e na Engenharia Agrícola. / The profession of the Biosystems Engineer is very recent in Brazil. The first undergraduate major was implemented in 2009. Due to its affinity with Agricultural Engineering, the regulatory entities of the Engineering majors in Brazil do not recognize its graduates as Biosystems Engineers, but rather call them Agricultural Engineers with specificity in Biosystems. In view of this problem, the objective of this research was to draw parallels between the scientific fields of Agricultural Engineering and Biosystems Engineering, in order to find information that lead to understanding the points of proximity and distancing of the studied domains. The method used to reach the proposed goal was Domain Analysis, opting for approaches with Historical Studies and Bibliometric Studies, with the adoption of the Bardin content analysis and the elaboration of word clouds to allow for comparisons. The results allowed us to understand that there are several moments in which Biosystems Engineering and Agricultural Engineering are similar, as in the organization and duration and completion of the majors. However, the disseminated contents offer a variation regarding the subjects related to Zootechnics and Sciences Biological Sciences. While Engineering of Biosystems treats them as central themes, Agricultural Engineering has them as peripheral themes. Scientific production also has its peculiar characteristics, and there are periodicals that publish only the content of one or the other Engineering, however there are in greater number periodicals that publish the two Engineering concomitantly, demonstrating that despite their specificities, there is much in common in Engineering Biosystems and Agricultural Engineering.

Submitted by GISLAINE IMACULADA DE MATOS null (gislaine.matos@ifms.edu.br) on 2018-02-05T23:07:07Z No. of bitstreams: 1 Gislaine Imaculada de Matos - Dissertação.pdf: 900143 bytes, checksum: 92b389ff450fa7a7fea3ae666d037a36 (MD5) / Approved for entry into archive by Satie Tagara (satie@marilia.unesp.br) on 2018-02-06T17:26:48Z (GMT) No. of bitstreams: 1 matos_gi_me_mar.pdf: 900143 bytes, checksum: 92b389ff450fa7a7fea3ae666d037a36 (MD5) / Made available in DSpace on 2018-02-06T17:26:48Z (GMT). No. of bitstreams: 1 matos_gi_me_mar.pdf: 900143 bytes, checksum: 92b389ff450fa7a7fea3ae666d037a36 (MD5) Previous issue date: 2018-01-12 / Não recebi financiamento / Os estudos de gênero e feministas vêm sendo estudado como campo científico desde o início dos anos 1990. Para análise das atividades científicas nessa área, deve ser considerado o contexto social, histórico e cultural para obter resultados mais consistentes. Esta pesquisa tem como objetivo geral analisar a produção científica acerca do domínio “Feminismo e Estudos de Gênero”, por meio da aplicação de indicadores bibliométricos, aos artigos publicados entre 2001 a 2016 no periódico Revista Estudos Feministas (REF), da Universidade Federal de Santa Catarina (UFSC). Como objetivos específicos, procura-se identificar e analisar as tendências atuais na comunidade científica sobre os tópicos abordados pelo periódico, criando um mapeamento de sua produção a partir dos seguintes indicadores: autores mais frequentes em produção e suas coautorias, temáticas mais frequentes, autores mais citados e origem geográfica dos autores, de forma a caracterizar o domínio. A pesquisa tem o caráter quantitativo e qualitativo, na medida em que analisa e contextualiza os dados a partir da perspectiva da epistemologia feminista. Como procedimento de pesquisa utilizou-se a base de dados SciELO como fonte de dados, o Microsoft Excel para confecção e apresentação de tabelas e gráficos, o Tesauro para Estudos de Gênero e sobre Mulheres para a seleção das temáticas mais frequentes e o software Ucinet para confecção da rede de coautorias. Observou-se que mais da metade dos autores (67,85%) publicam em autoria individual, sendo a falta de investimento nas Ciências Humanas e Ciências Sociais Aplicadas uma causa que pode ser considerada. A aplicação da análise de citação demonstrou que há um grande embasamento epistemológico e sociológico dos artigos, além de uma preocupação com políticas públicas. Na análise de temáticas mais frequentes houve uma maior quantidade de publicações relacionadas a questões teóricas e voltadas para temas emergentes como violência contra mulheres e também pesquisas direcionadas à melhoria de políticas públicas. As temáticas que não foram tão acentuadas apresentam áreas que podem receber uma maior atenção dos pesquisadores de Estudos de Gênero e Feminismos, sendo elas: “Educação”; “Ciência e Tecnologia”; “Economia e Emprego” e “Comunicação, Artes e Espetáculo”. O aumento no número de artigos publicados sobre o tema nos últimos anos demonstra o incremento e a frequência do contraponto no debate. Além disso, a participação de autores estrangeiros no periódico corrobora a importância mundial dada ao estudo dessa temática, embora o volume de trabalhos ainda não seja o suficiente para fortalecer a discussão e tornar o tema de consistência maior. Deseja-se que essa análise sirva como instrumento de avaliação para a própria comunidade científica em questão, além de estimular outras pesquisas com diferentes abordagens envolvendo a temática Estudos de Gênero e Feminismos, visto que essas análises e temáticas envolvem tanto relações de poder, quanto a possível ruptura da tradição do modelo binário de gênero nas esferas da ciência, da política, das instituições e na sociedade de forma geral. / Gender and feminist studies have been researched as a scientific field since the beginning of the third feminist wave in the 1990s. For the analysis of scientific activities in this area, the social, historical and cultural context must be considered in order to obtain more coherent results. This research has the general objective to analyze the scientific production on the domain "Feminism and Gender Studies", through the application of bibliometric indicators, in the the articles published between 2001 and 2016 in the Journal of Feminist Studies of Federal University of Santa Catarina (UFSC). As specific objectives, intended to identify and analyze the current trends in the scientific community about the topics covered by the journal, creating a mapping of their scientific production from the following indicators: more frequent authors in production and their coauthories, more frequent themes, most cited authors and geographical origin of the authors, in order to characterize the domain. The research has the character quantitative and qualitative, in that it analyzes and contextualizes the data from the perspective of feminist epistemology. As a research procedure, the SciELO database was used as data source, Microsoft Excel for the preparation and presentation of tables and graphs, the Thesaurus for Gender Studies and Women for the selection of the most frequent themes and the Ucinet software for the creation of the co-authoring network. It was observed that more than half of the authors (67.85%) published in individual authorship, being the lack of investment in the Human Sciences and Applied Social Sciences a cause that can be considered. The application of the citation analysis demonstrated that there is a great epistemological and sociological basis of the articles, besides a concern with public policies. In the analysis of the most frequent themes, there was a greater amount of publications related to theoretical issues and focused on emerging issues such as violence against women and also research aimed at improving public policies. The themes that have not been so accentuated present areas that can receive greater attention from the researchers of Gender Studies and Feminisms, being: "Education"; "Science and technology"; "Economy and Employment" and "Communication, Arts and Entertainment". The increase in the number of articles published on the topic in recent years demonstrates the increase and frequency of the counterpoint in the debate. In addition, the participation of foreign authors in the journal corroborates the worldwide importance given to the study of this subject, although the volume of work is still not enough to strengthen the discussion and make the theme of consistency greater. It is expected that this analysis will serve as an evaluation tool for the scientific community in question, besides stimulating other researches with different approaches involving the theme Gender Studies and Feminists, whereas these analyzes and themes involve both relations of power and the possible rupture of the tradition of the binary gender model in the spheres of science, politics, institutions and general society.

Various methods of DNA sequences modifications for frequency analysis and basic characteristics of DNA are described in the theoretical part of this thesis. Tricolor spectrograms, created by short time Fourier transform help us to recognize some characteristic patterns in DNA sequences. Practical part of this work deals with developed programme which generates spectrograms and analyse them. Last part deals with the analysis of selected sequences of C. elegans genome. Some patterns are related to data of public databases such as NCBI. Various patterns are explained from the biological nature, which relates to chromosome structure and protein coding regions. Another well recognised patterns, tandem repetitions composed of satellites, microsatellites and minisatelites are described by spectrograms as well.

The need for interoperability in emergency communication systems has hastened the development of cognitive radio technology. However, even though a cognitive radio system technically interconnects participating agencies, interoperability depends not only on technical matters but also organizational issues related to the different individuals, working contexts and types of cooperative work involved. In order to support public safety workers such as police, firefighters, and Emergency Medical Service (EMS) providers appropriately, it is vital to consider the dynamics of the way they interact in any collaborative situation. The purpose of this study is to develop an in-depth understanding of interoperability and construct a new model based on this understanding, along with a working model of an interoperable communication system to serve as a design framework that (1) supports effective public safety communication and (2) incorporates cognitive radio capabilities to ensure optimal semantic interoperability. An adequate model for interoperability must include multiple dimensions to explain both the concept of interoperability in the public safety domain and its relationships with task characteristics and information needs. This model focuses primarily on the requirements for communication systems. The value perspective reflects the evaluation criteria for effective team communication such as semantic interoperability, task routineness, and information processing aspects. The design framework incorporates the proposed model into Work Domain Analysis (WDA). To achieve these research objectives, a series of studies was conducted. The first was a qualitative exploratory study that identified how the concept of interoperability is manifested in the public safety work domain. Through the use of semi-structured interviews, communication patterns in terms of interoperability were placed in a real world context. The responses from the participants were categorized in terms of the dimensions of interoperability and reinterpreted using sensemaking as a theoretical framework. The dimensions of interoperability identified consisted of information sharedness, communication readiness, operational awareness, adaptiveness, and coupledness. Based on these findings, a new instrument was proposed to measure interoperability for communication systems. This instrument was then statistically validated. The second study identified the effects of different types of operation and types of organization on interoperability, as well as investigating the relationships among interoperability, task routineness and information processing using Structural Equation Modeling (SEM). Based on this understanding and theoretical perspective, a new interoperable communication structure was delineated in the model. A prototype of a public safety cognitive radio communication system was then developed based on the proposed framework and examined using a focus group in order to validate the proposed model and design framework and highlight any usability issues that may affect the prototype's operational effectiveness. / Ph. D.