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González, Maturana Rodrigo. "Rodoviario San Francisco de la Selva RSFS". Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/100311.
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Kijek, Jaroslaw Jacek [Verfasser]. "RsfS (YbeB) is an universally conserved ribosome silencing factor / Jaroslaw Jacek Kijek". Berlin : Freie Universität Berlin, 2013. http://d-nb.info/1036872769/34.
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Fatkhullin, Bulat. "Structural and functional studies of the ribosome silencing factor RsfS from the pathogenic bacteria Staphylococcus aureus". Electronic Thesis or Diss., Strasbourg, 2023. http://www.theses.fr/2023STRAJ018.
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Actuellement, en raison de l'utilisation active et parfois incontrôlée des antibiotiques, le nombre de souches de S. aureus présentant une résistance élevée aux médicaments antibactériens augmente chaque année. Les cellules persistantes jouent un rôle important dans ce processus. Même en l'absence de résistance aux antibiotiques, ces cellules survivent, provoquant des infections récurrentes, car elles ont bloqué les sites de liaison de la plupart des médicaments thérapeutiques affectant le ribosome de S. aureus. Par conséquent, la lutte contre les mécanismes cellulaires responsables de la transition des cellules vers un état persistant est une priorité pour la recherche. L'un de ces mécanismes est lié au fonctionnement du facteur RsfS. Dans cette étude, la première structure cryo-EM à résolution de 3.2 Å du complexe 50S et RsfS et la structure X-ray à résolution de 2.3 Å du complexe RsfS et uL14 ont été obtenues. La région de l'acide aminé Tyr 98 de RsfS est un site critique pour la préservation des fonctions anti-associatives du facteur RsfS de S. aureus. Les résultats obtenus dans ce projet pourraient servir de base au développement de nouveaux types de médicaments capables d'atténuer les propriétés pathogènes de S. aureusCurrently, due to the active and sometimes uncontrolled use of antibiotics, the number of S. aureus strains with high resistance to antibacterial drugs increases every year. Persister cells play an important role in this process. Even in the absence of antibiotic resistance, these cells survive, causing recurrent infections, since they have blocked the binding sites of most therapeutic drugs affecting the S. aureus ribosome. Therefore, combating the cellular mechanisms responsible for the transition of cells to a persister state is a priority for research. One such mechanism is related to the functioning of the RsfS factor. In this study, the first 3.2 Å resolution cryo-EM structure of the 50S and RsfS complex and X-ray 2.3 Å resolution structure of the RsfS and uL14 complex were obtained. The RsfS Tyr 98 amino acid region is a critical site for preserving the anti-associative functions of the S. aureus RsfS factor. The obtained in this work results could form the basis for the development of new types of drugs capable of attenuating the pathogenic properties of S. aureus
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Gomes, Waldenor Ramone Juvito. "Solução analítica para o modelo RSOS". reponame:Repositório Institucional da UnB, 2016. http://repositorio.unb.br/handle/10482/21452.
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Dissertação (mestrado)—Universidade de Brasília, Instituto de Física, Programa de Pós-Graduação em Física, 2016.Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2016-08-26T17:36:15Z No. of bitstreams: 1 2016_WaldenorRamoneJuvitoGomes.pdf: 761006 bytes, checksum: 85217e8d2f95a45f8d3451df3d06b44f (MD5)
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Nesta dissertação iremos analisar a dinâmica do crescimento para modelos de autômatos celulares. Uma vez que a evolução cria uma superfície de fractal, mostraremos que a variação da rugosidade pode ser apresentada em uma expressão simples que combina duas componentes: a distribuição de probabilidade das configurações da superfície e as regras que define um autômato celular. A partir destas considerações investigaremos uma das variações do modelo RestrictedSolid-On-Solid(RSOS) em 1+1 dimensão e as propriedades da rugosidade, assim como as propriedades gerais que a mesma deve satisfazer. _________________________________________________________________________________________________ ABSTRACT
This dissertation will examine the growth dynamics for cellular automata models. Since the evolution creates a fractal surface, we show that the variations of roughness can be presented in simple expression that combine two combines: the probability distribution of the surface configurations and the rules that define a cellular automata. From these considerations we will investigate one of the variations of the Restricted Solid-On-Solid (RSOS) model in 1+1 dimensions and properties of the roughness, as well as the general properties that it must satisfy.
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Muller, Louis C. "RSFQ digital circuit design automation and optimisation". Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96808.
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Thesis (PhD)--Stellenbosch University, 2015.ENGLISH ABSTRACT: In order to facilitate the creation of complex and robust RSFQ digital logic circuits an extensive library of electronic design automation (EDA) tools is a necessity. It is the aim of this work to introduce various methods to improve the current state of EDA in RSFQ circuit design. Firstly, Monte Carlo methods such as Latin Hypercube sampling and Sobol sequences are applied for their variance reduction abilities in approximating circuit yield. In addition, artificial neural networks are also investigated for their applicability in modeling the parameter-yield space. Secondly, a novel technique for circuit functional testing using automated state machine extraction is presented, which greatly simplifies the logical verification of a circuit. This method is also used, along with critical timing extraction, to automatically generate Hardware Description Language(HDL) models which can be used for high level circuit design. Lastly, the Greedy Local search, Simulated Annealing and Genetic Algorithm meta-heuristics were statistically compared in a novel manner using a yield model provided by artificial neural networks. This is done to ascertain their performance in optimising RSFQ circuits in relation to yield. The variance reduction techniques of Latin Hypercube Sampling and Sobol sequences were shown to be beneficial for the use with RSFQ circuits. For optimisation purposes the use of Simulated Annealing and Genetic Algorithms were shown to improve circuit optimisation for possible multi-modal search spaces. An HDL model is also successfully generated from a complex RSFQ circuit for use in high level circuit design which includes critical timing and propagation latency. All the techniques presented in this study form part of a software library that can be further refined and extended in future work.
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Tubiello, Neto Francesco. "Técnica de otimização de energia para RSSF". Pontifícia Universidade Católica do Rio Grande do Sul, 2015. http://hdl.handle.net/10923/7638.
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Previous issue date: 2015Wireless Sensors Network (WSN) based systems, are traditionally used to monitor events in places with limited human access. A WSN is formed by a group of devices called sensors node, each responsible for transporting monitored data to a certain destination and performing other programmed tasks in order to comply with further objectives of the proposed system. Since power consumption is one of the main challenges associated to the use of WSNs, techniques to minimize such energy consumption of a complete WSN or even in one sensor node, have been object of extended research. Maximizing the lifetime of the network can be obtained throughout better data package management or by reducing the adopted transmission power, for example. It is important to note that this optimization is limited by the process delay of the sensor node itself, as well as by interference causing an increased error rate, which itself affects the data packet transmission between source and destination. In this context, this work proposes a technique able to stimulate individually tailored behavioral changes regarding the data packets analysis and the consumption energy thought certain transmission path in each sensor node. It called Path Energy Control Technique (PECT).In more details, the PECT is based on the adjustment of the power transmission from on the analysis of the Received Signal Strength Indicator (RSSI) and a quality metric is assigned to paths, where the data packets flow between nodes. This metric is calculate from the efficiency in the data packet’s reception, from the disturbance in the path, as well as the data packet sending frequency due the number of sensors nodes for the specific neighborhood. It should be mention the PECT technique will be represented by a algorithm to be development in this work which will be implemented at application level, guarantying portability, independent from the hardware used for the WSN. In addition, the PECT is able to manage the data transmission frequency and to support different network topologies, including multipath topologies. Finally, the PECT technique is validated through simulations and the results were obtained from the evaluation of the efficiency. The techniques’ robustness is analyzed and compared with other techniques from literature.
Sistemas baseados em Rede de Sensores Sem Fio (RSSF) são tradicionalmente utilizados para monitorar eventos em áreas onde o acesso é limitado. Uma RSSF é formada por um conjunto de dispositivos chamados de nodos sensores, os quais têm a missão de transportar os dados monitorados para um determinado destino e executar as tarefas programadas para cumprir com os objetivos do sistema proposto. Técnicas que visam minimizar o consumo de energia de RSSF ou até mesmo de apenas um nodo sensor vêm sendo objeto de várias pesquisas, uma vez que a energia representa um dos desafios relacionados ao uso de RSSF. A maximização da vida útil da rede pode ser obtida a partir de uma melhor gestão dos pacotes de dados ou até mesmo a partir da redução da potência de transmissão adotada, por exemplo. Note que essa maximização é limitada no momento em que se observa um aumento da taxa de erros em função da interferência que, por sua vez, afeta a transmissão dos pacotes de dados entre a origem e o destino, bem como em função do próprio atraso do processamento no nodo sensor. Neste contexto, o presente trabalho propõe uma técnica capaz de modificar individualmente o comportamento de cada nodo sensor a partir da análise dos pacotes de dados e da energia consumida por um determinado caminho de transmissão Path Energy Control Technique (PECT).Em mais detalhes, a técnica baseia-se no ajuste da potência de transmissão a partir da análise do Received Signal Strength Indicator (RSSI) e de uma métrica de qualidade que será atribuída ao caminho que os dados trafegam na rede entre os nodos. Essa métrica é calculada a partir da eficiência da recepção dos pacotes, da perturbação no caminho dos dados e da frequência de envio dos pacotes de dados em função do número de nodos sensores da vizinhança. Convém mencionar que a PECT foi representada por um algoritmo a ser desenvolvido, e poderá ser implementada no nível de aplicação, o que, por sua vez, garante a portabilidade e o uso independente do hardware que está sendo utilizado para a RSSF. Além disso, a PECT é capaz de gerenciar a frequência de envio de dados e de suportar diferentes topologias de redes, incluindo as topologias de multipath. Finalmente, a técnica será validada através de simulações, e os resultados obtidos na avaliação da eficiência e da robustez da mesma, serão analisados e comparados com outras técnicas presentes na literatura.
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Chen, Jui-Chun. "A virtual RSNS direction finding antenna system". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FChen%5FJui.pdf.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Dec. 2004.Thesis Advisor(s): David C. Jenn, Phillip E. Pace. Includes bibliographical references (p. 69-70). Also available online.
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Collot, Romain. "Etude d’une tête de réception hyperfréquence en technologie supraconductrice". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT043.
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Les systèmes de télécommunication de type radio logicielle ou "Software Defined Radio" (SDR) exploitent les techniques numériques qui permettent leur reconfigurabilité, que ce soit en termes de fréquence, de bande passante utilisée, ou de méthode de modulation/démodulation des signaux. Ceux-ci nécessitent des architectures permettant la numérisation des signaux analogiques RF à des fréquences d'échantillonnage de plusieurs dizaines de GHz, avec des bandes passantes de plusieurs dizaines de MHz et une résolution supérieure à 10 bits. Ces objectifs sont très difficiles à atteindre avec la technologie actuelle des semi-conducteurs. La logique à quantum de flux magnétique ou logique "Rapid Single-Flux-Quantum" (RSFQ) se présente comme un candidat séduisant pour la conception de tels systèmes.En effet, celle-ci permet d'atteindre des fréquences d'horloge de plusieurs centaines de GHz pour une consommation d'environ 100 nW par porte logique. Le travail de thèse a consisté en la réalisation d'un prototype de chaîne de réception RF analogique-numérique en technologie RSFQ. L'étude et la conception des différents blocs la constituant comme le convertisseur analogique-numérique et ceux de traitement du signal numérisé en aval a été réalisée. Les premiers résultats expérimentaux confirment la fonctionnalité des cellules RSFQ de base constituant le bloc de traitement numérique. La difficulté à faire fonctionner expérimentalement les blocs plus complexes a soulevé la question de la sensibilité des cellules RSFQ aux perturbations magnétiques extérieures. Cette problématique a été étudiée sur des circuits RSFQ simples et a permis de conclure qu'un champ magnétique externe de quelques dizaines de $mu$T était suffisant pour dégrader le fonctionnement de tels circuits. Une solution de prise en compte des effets d'un champ magnétique externe dans le simulateur utilisé a été développée pour anticiper ces problèmes dès la conception. Celle-ci a été validée expérimentalement avec un Superconducting Quantum Interference Device (SQUID)Information and telecommunication Software Defined Radio (SDR) systems are mainly based on digital techniques, which enable to easily reconfigure them, in terms of frequency, bandwidth and modulation techniques. They can process the information entirely in a digital way, by directly sampling the input RF signal and require analog-to-digital converters with strong performances. Indeed, SDR systems have to work at sampling frequencies of several tens of GHz, with large bandwidths and a suitable resolution ($geq$ 10 bits). Rapid-Single-Flux-Quantum logic (RSFQ) seems to be an interesting solution to design such systems. This technology can reach clock frequencies of several hundreds of GHz with a power consumption of only 100 nW per logic gate. This work deals with the design of a superconductive RF front-end receiver based on RSFQ technology. The study of the different parts of the chain was done, such as the analog-to-digital converter and the signal processing part of the digital signal. Experimental results confirm that all simple RSFQ cells work with correct margins. Complex circuits work with more difficulty, raising the issue of the sensitivity of RSFQ cells to external magnetic disturbances. This point was studied on basic RSFQ cicuits and shows that a magnetic field of about 10 $mu$T is sufficient to spoil the operation of the circuit. Moreover, a solution to take into account magnetic effects in the simulation of the circuits was developed and experimentally validated on a Superconducting Quantum Interference Device (SQUID)
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Androutsopoulos, Kalliopi. "Specification and verification of reactive systems with RSDS". Thesis, King's College London (University of London), 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414509.
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Салуян, М. В. "Android-застосування для читання RSS". Thesis, Чернігів, 2021. http://ir.stu.cn.ua/123456789/23070.
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Салуян, М. В. Android-застосування для читання RSS : випускна кваліфікаційна робота : 123 "Кoмп’ютepнa iнжeнepiя" / М. В. Салуян ; керівник роботи О. А. Пріла ; НУ "Чернігівська політехніка", кафедра iнфopмaцiйниx тa кoмп’ютepниx cиcтeм. – Чернігів, 2021. – 54 с.Метою кваліфікаційної роботи є розробка мобільного додатку для вивчення мови програмування Kotlin і вдосконалення навичків розробки Androidзастосувань. Об’єктом дослідження є технологія RSS, як найкращий спосіб автоматичного отримання оновлень з веб-сайтів. Предметом дослідження є Android-застосування для читання RSS. Для створення застосування використовувалися: інтегроване середовище розробки Android Studio, мова програмування Kotlin та реляційна система керування базами даних SQLite. Результатом роботи є RSS-агрегатор для Android-пристроїв, що виконує функції отримання оновлень з веб-сайтів та їх перегляду. Подальша реалізація застосування можлива шляхом додавання додаткових функцій керування отриманими оновленнями з веб-сайтів та збільшення можливостей налаштування інтерфейсу користувача.
The purpose of the qualification work is to learn the programming language Kotlin and improve skills in developing Android applications. The object of research is RSS technology as the best way to automatically receive updates from websites. The subject of the study is an RSS reader Android application. The following resources were used to create the application: Android Studio integrated development environment, Kotlin programming language and SQLite relational database management system. The result of the qualification work is an RSS aggregator for Android devices, which performs the functions of receiving updates from websites and viewing them. Further implementation of the application is possible by adding additional functions to manage updates received from websites and by increasing the ability to customize the user interface.
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Vanejevas, Andrius. "RSS šaltinių kaupimo ir peržiūros sistema". Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140716_111629-78245.
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RSS šaltinių kaupimo ir peržiūros sistema sukurta, norint įgyvendinti funkcijas, kurių nėra kitose panašiose sistemose: naujienų siuntimas el. paštu, automatinis naujienų archyvavimas. Kita priežastis, dėl ko sukurta sistema, tai vartotojo sąsajos paprastumas, nereikalaujantis specifinių žinių, kad nekiltų keblumų naudojantis sistemos funkcijomis.
Pirmame darbo skyriuje aprašoma HTML, XML, RSS ir Atom standartai, detalizuoti paveiksliukais ir lentelėmis. Taip pat aprašoma RSS apdorojimo web sprendimai, trumpai aprašomi privalumai, trūkumai ir pateikiama palyginimų lentelė.
Reikalavimų specifikacija parodo, kokias funkcijas turi atlikti sistema. Pateikiama panaudojimo atvejų diagrama, funkciniai ir nefunkciniai reikalavimai. Taip pat aprašomi reikalavimai esamų duomenų perkėlimui ir galimos sistemos kūrimo rizikos.
Trečiame skyriuje, architektūros specifikacija pateikama UML diagramomis: veiklos, sekų, bendradarbiavimo, klasių, esybių ryšių ir komponentų diagramos. Iš pateiktų diagramų galima matyti kaip sistema atrodo iš architektūros pusės ir galima suprasti kaip veikia viena ar kita funkcija.
Testavimo dokumentacijos paskirtis – parodyti dar neatrastas klaidas, kurios gali paveikti visos sistemos funkcionalumą. Sistemos testavimas pateikiamas lentelėse. Buvo atlikti sistemos funkcijų, našumo, suderinamumo ir saugumo testavimai.
Vartotojo vadovas sukurtas, kad parodyti sistemos funkcijų galimybes. Vartotojo vadovas pateikiamas DUK formoje, integruota pačioje sistemos... [toliau žr. visą tekstą]The "Gathering and Viewing System of RSS Sources" was developed in order to implement features that are not presented in other similar systems: send email newsletter to users and automatically archive news items. Another reason for creating a system is the simplicity of the user interface and does not require specific knowledge that avoid problems using the system. The first chapter describes the HTML, XML, RSS and Atom standards, detailed with pictures and tables. It also provides web solutions for processing RSS feeds, briefly describes the advantages and disadvantages. As a result, web solutions of the RSS feeds represents in comparison table. Requirements specification indicates what functions have to perform this system. It represents use case diagram, the functional and non-functional requirements. It also, describes the requirements of the existing data transfer and the potential risk of system development. In the third chapter of architectural specification contains UML diagrams: activity, sequence, collaboration, class, entity and component. From these diagrams you can see how the system looks like from the architecture side, this way you can understand the operation of one or the other function. Also, diagrams are represented in simple and short descriptions, and detailed tables. The purpose of testing documentation is to show undetected bugs that may affect the overall system’s functionality. The testing of system was detailed in tables. It was carried out of... [to full text]
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Matos, Daniel Ribeiro. "Um algoritmos distribuÃdo para escalonamento de sensores em RSSF". Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12187.
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nÃo hÃRedes de Sensores Sem Fio (RSSF) sÃo utilizadas em diversos tipos de aplicaÃÃes: desde casas inteligentes a aplicaÃÃes militares. RSSF possuem, em geral, severas restriÃÃes energÃticas - um sensor geralmente possui uma quantidade limitada de bateria e este nÃo à substituÃvel. Os sensores podem possuir uma certa redundÃncia de uma Ãrea sensoreada, uma vez que, quando os sensores sÃo distribuÃdos de forma aleatÃria, alguns sensores acabam ficando muito prÃximos, ou mesmo quando sÃo depositados de maneira determinÃstica, uma certa redundÃncia à necessÃria para prever a falha de alguns destes sensores. Neste trabalho, propomos um algoritmo distribuÃdo que faz um escalonamento de sensores ativos, de forma a reduzir a redundÃncia dos dados coletados e aumentar o tempo de vida da rede de sensores.
Wireless Sensor Networks (WSNs) are used in a lot of applications: from smart homes to military enviromnets. In general, WSNs has severe energy restrictions - a sensor usualy has a limited batery and itâs not replaceable. Distributing the sensor in a random mander can lead to a redundancy of some areas and this is desirable to support fail of some sensors. In this work, we propose an distributed algorithm to schedule active sensors to reduce the redundancy of data obtainned by the network and prolong the network lifetime.
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Tubiello, Neto Francesco. "T?cnica de otimiza??o de energia para RSSF". Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2015. http://tede2.pucrs.br/tede2/handle/tede/6355.
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Wireless Sensors Network (WSN) based systems, are traditionally used to monitor events in places with limited human access. A WSN is formed by a group of devices called sensors node, each responsible for transporting monitored data to a certain destination and performing other programmed tasks in order to comply with further objectives of the proposed system. Since power consumption is one of the main challenges associated to the use of WSNs, techniques to minimize such energy consumption of a complete WSN or even in one sensor node, have been object of extended research. Maximizing the lifetime of the network can be obtained throughout better data package management or by reducing the adopted transmission power, for example. It is important to note that this optimization is limited by the process delay of the sensor node itself, as well as by interference causing an increased error rate, which itself affects the data packet transmission between source and destination. In this context, this work proposes a technique able to stimulate individually tailored behavioral changes regarding the data packets analysis and the consumption energy thought certain transmission path in each sensor node. It called Path Energy Control Technique (PECT).In more details, the PECT is based on the adjustment of the power transmission from on the analysis of the Received Signal Strength Indicator (RSSI) and a quality metric is assigned to paths, where the data packets flow between nodes. This metric is calculate from the efficiency in the data packet?s reception, from the disturbance in the path, as well as the data packet sending frequency due the number of sensors nodes for the specific neighborhood. It should be mention the PECT technique will be represented by a algorithm to be development in this work which will be implemented at application level, guarantying portability, independent from the hardware used for the WSN. In addition, the PECT is able to manage the data transmission frequency and to support different network topologies, including multipath topologies. Finally, the PECT technique is validated through simulations and the results were obtained from the evaluation of the efficiency. The techniques? robustness is analyzed and compared with other techniques from literature.
Sistemas baseados em Rede de Sensores Sem Fio (RSSF) s?o tradicionalmente utilizados para monitorar eventos em ?reas onde o acesso ? limitado. Uma RSSF ? formada por um conjunto de dispositivos chamados de nodos sensores, os quais t?m a miss?o de transportar os dados monitorados para um determinado destino e executar as tarefas programadas para cumprir com os objetivos do sistema proposto. T?cnicas que visam minimizar o consumo de energia de RSSF ou at? mesmo de apenas um nodo sensor v?m sendo objeto de v?rias pesquisas, uma vez que a energia representa um dos desafios relacionados ao uso de RSSF. A maximiza??o da vida ?til da rede pode ser obtida a partir de uma melhor gest?o dos pacotes de dados ou at? mesmo a partir da redu??o da pot?ncia de transmiss?o adotada, por exemplo. Note que essa maximiza??o ? limitada no momento em que se observa um aumento da taxa de erros em fun??o da interfer?ncia que, por sua vez, afeta a transmiss?o dos pacotes de dados entre a origem e o destino, bem como em fun??o do pr?prio atraso do processamento no nodo sensor. Neste contexto, o presente trabalho prop?e uma t?cnica capaz de modificar individualmente o comportamento de cada nodo sensor a partir da an?lise dos pacotes de dados e da energia consumida por um determinado caminho de transmiss?o Path Energy Control Technique (PECT).Em mais detalhes, a t?cnica baseia-se no ajuste da pot?ncia de transmiss?o a partir da an?lise do Received Signal Strength Indicator (RSSI) e de uma m?trica de qualidade que ser? atribu?da ao caminho que os dados trafegam na rede entre os nodos. Essa m?trica ? calculada a partir da efici?ncia da recep??o dos pacotes, da perturba??o no caminho dos dados e da frequ?ncia de envio dos pacotes de dados em fun??o do n?mero de nodos sensores da vizinhan?a. Conv?m mencionar que a PECT foi representada por um algoritmo a ser desenvolvido, e poder? ser implementada no n?vel de aplica??o, o que, por sua vez, garante a portabilidade e o uso independente do hardware que est? sendo utilizado para a RSSF. Al?m disso, a PECT ? capaz de gerenciar a frequ?ncia de envio de dados e de suportar diferentes topologias de redes, incluindo as topologias de multipath. Finalmente, a t?cnica ser? validada atrav?s de simula??es, e os resultados obtidos na avalia??o da efici?ncia e da robustez da mesma, ser?o analisados e comparados com outras t?cnicas presentes na literatura.
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Tozzo, Rafael Gon?alves. "Desenvolvimento e teste de n? sensor solar para rssf". Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/975.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
The dissertation describes the development of an autonomous wireless network element, which enables researchers to gather information in outdoor environments. Investigating the autonomy of sensor nodes, and the dimensioning of a battery and a photovoltaic panel. For the validation of the solution, is used the sensor node developed in this work to collect data in external areas for periods of time. Applying strategies for dimensioning an energy system to aiming the needs of a sensor node in an external environment. An energy-saving strategy has been developed with sleep mode that allows higher work cycles to the NSS. The results are the finding that the NSS worked in the period, through the voltage level of the battery, which is related to the energy of the same. It can be affirmed that the NSS functioned and the objective of monitoring quantities in outdoor environments.
A disserta??o descreve o desenvolvimento de um elemento de rede sem fio aut?nomo, que possibilita a pesquisadores a coleta de informa??es em ambientes externos. Investigando a autonomia de n?s sensores, e o dimensionamento de uma bateria e de um painel fotovoltaico. Para a valida??o da solu??o, utiliza-se o n? sensor desenvolvido para a realiza??o de coletas de grandezas em ?reas externas por per?odos de tempo. Aplicando estrat?gias de dimensionamento de um sistema de energia visando as necessidades de um n? sensor em ambiente externo. Foi desenvolvida uma estrat?gia de economia de energia, com sleep mode que permite ciclos de funcionamento maiores ao NSS. Os resultados ? a constata??o de que o NSS funcionou no per?odo, atrav?s do n?vel de tens?o da bateria, que est? relacionado com a energia da mesma. Podendo afirmar-se que o NSS funcionou e atente ao objetivo de monitorar grandezas em ambientes externos.
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Matveev, Konstantin. "q-deformed Interacting Particle Systems, RSKs and Random Polymers". Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493453.
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We introduce and study four $q$-randomized Robinson--Schensted--Knuth (RSK) insertion tableau dynamics. Each of them is a discrete time Markov dynamics on two-dimensional interlacing particle arrays (these arrays are in a natural bijection with semistandard Young tableaux). For $0
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Matos, Daniel Ribeiro. "Um algoritmos distribuído para escalonamento de sensores em RSSF". reponame:Repositório Institucional da UFC, 2013. http://www.repositorio.ufc.br/handle/riufc/13353.
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MATOS, D. R. Um algoritmos distribuído para escalonamento de sensores em RSSF. 2013. 59 f. Dissertação (Mestrado em Ciência da Computação) - Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2013.Submitted by Daniel Eduardo Alencar da Silva (dealencar.silva@gmail.com) on 2015-01-23T18:29:56Z No. of bitstreams: 1 2013_dis_drmatos.pdf: 2537544 bytes, checksum: 870eae75ce068b1ef961e23307dda2a9 (MD5)
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Wireless Sensor Networks (WSNs) are used in a lot of applications: from smart homes to military enviromnets. In general, WSNs has severe energy restrictions - a sensor usualy has a limited batery and it’s not replaceable. Distributing the sensor in a random mander can lead to a redundancy of some areas and this is desirable to support fail of some sensors. In this work, we propose an distributed algorithm to schedule active sensors to reduce the redundancy of data obtainned by the network and prolong the network lifetime.
Redes de Sensores Sem Fio (RSSF) são utilizadas em diversos tipos de aplicações: desde casas inteligentes a aplicações militares. RSSF possuem, em geral, severas restrições energéticas - um sensor geralmente possui uma quantidade limitada de bateria e este não é substituível. Os sensores podem possuir uma certa redundância de uma área sensoreada, uma vez que, quando os sensores são distribuídos de forma aleatória, alguns sensores acabam ficando muito próximos, ou mesmo quando são depositados de maneira determinística, uma certa redundância é necessária para prever a falha de alguns destes sensores. Neste trabalho, propomos um algoritmo distribuído que faz um escalonamento de sensores ativos, de forma a reduzir a redundância dos dados coletados e aumentar o tempo de vida da rede de sensores.
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Andersson, Ola, i Niclas Larsson. "RSS – The future of internal communication?" Thesis, Växjö University, School of Mathematics and Systems Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-377.
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RSS is a format for easy information sharing between computers. A RSS-file, also known as a feed or a channel, consist of a list of items. The items are structured with XML-tags and have to be processed in some way before it can be read. RSS¬readers, web-browsers with RSS support and e-mail-clients with RSS support can be used to display the feed.
This thesis is focused to investigate if RSS can be used within an enterprise for internal communication. We look at different computer based communication tools that are available today and compare them with RSS. All the different tools has there advantages as well as disadvantages, we have tried to find out if there is room for one more information channel within an enterprise.
Our study shows that RSS is not suitable as a stand alone solution for internal combination. RSS main strengths lies in mass information that has to be pushed out in one direction.
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Brochard, Jean-Christophe Noël Elisabeth. "Utilisation des fils RSS en bibliothèque". [S.l.] : [s.n.], 2005. http://www.enssib.fr/bibliotheque/documents/dcb/M-2005-RECH-03.pdf.
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Clark, Charles E. "Doloĭ negramotnostʹ the literacy campaign in the RSFSR, 1923-1927 /". [Urbana-Champaign : University of Illinois], 1993. http://catalog.hathitrust.org/api/volumes/oclc/30010192.html.
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Nespolo, Renan Guilherme. "Sensor Deployment 3D para Redes de Sensores Sem Fio (RSSF) /". São José do Rio Preto, 2016. http://hdl.handle.net/11449/143444.
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Orientador: Leandro Alves NevesBanca: Alessandro Santana Martins
Banca: Rogéria Cristiane Gratão de Souza
Resumo: A distribuição de nodos sensores para redes de sensores sem fio é um tema desafiador e de relevância científica, com aplicações nos mais diferentes tipos de contextos. O núcleo do problema está em obter distribuições que forneçam a maior área de cobertura, com o mínimo de nodos sensores, principalmente quando a superfície de interesse é tridimensional. No presente trabalho é proposto um novo método para distribuição de nodos sensores para obter a cobertura máxima de uma área tridimensional, selecionando o menor número de nodos sensores. A distribuição de posições candidatas foi realizada por meio da dualidade triangulação de Delaunay/diagrama de Voronoi. O processo para seleção de posições considerou os vértices dos elementos geométricos e um raio de comunicação ���� ou de sensoriamento ��������. As posições foram selecionadas a partir da cobertura máxima e existência de comunicação. A garantia de comunicação foi dada aplicando o algoritmo de árvores geradoras mínimas. O método foi testado em diferentes superfícies tridimensionais, comumente encontradas na natureza e explorados em trabalhos da área. Os resultados foram relevantes, com áreas de coberturas entre 74% e 100%, valores que superaram os fornecidos por métodos reconhecidos da área
Abstract: The sensor deployment for wireless sensor networks (WSN), is a challenging and important scientific topic, with applications in several different contexts. The main problem is getting deployments that provide the largest coverage area with minimal sensor nodes, especially when the surface of interest is threedimensional. In this work is proposed a new method to obtain the deployment of sensor nodes with a maximum coverage area using a minimum number of sensor nodes in three-dimensional surfaces. The deployment was performed using the dual Delaunay triangulation/Voronoi diagram. The positions selection process considered vertices of geometric elements and communication radius ���� or sensing ��������. The positions were selected based on the maximum area coverage and the existence of communication among them. The verification of the communication is accomplished by the minimum spanning tree algorithm. To certify the versatility of the proposed method, we show the deployment in distinct surface areas commonly explored for WSN monitoring. The results were significant, with coverage area between 74% and 100% for distinct types of reliefs
Mestre
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Benveniste, Jessica A. "Design and development of a single channel RSNS direction finder". Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/March/09Mar%5FBenveniste.pdf.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 2009.Thesis Advisor(s): Pace, Phillip E. ; Jenn, David C. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: Direction Finding, Robust Symmetrical Number System, Single Channel, Angle of Arrival. Includes bibliographical references (p. 77-76). Also available in print.
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Davidsson, Marcus. "Förundersökning och koncept-framtagning av kompletterande produkt till RSS fallskyddssystem : Möjliggörande applicering av RSS fallskyddssystem till tak med fotrännor". Thesis, Karlstads universitet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-46236.
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Detta är en rapportering av ett examinationsprojekt inom högskoleingenjörsprogrammet i innovationsteknik och design. Uppdragsgivaren och projektbeställaren var Stefan Bäckström, VD för Roofac AB. Syftet med projektet var att göra en förundersökning om möjligheten att applicera RSS (Roof Safety Systems) fallskyddssystem på tak med fotrännor genom en tillbehörsprodukt. Denna förundersökning skulle därmed leda till en kunskapsbank och material som skulle kunna vara till nytta för vidare utvecklingsarbete av tillbehörsprodukten. Syftet var också att göra en bedömning kring potentialen att erhålla en prototyp som är tillräckligt bra att användas som en tillbehörsprodukt. Metoden att uppfylla syftet med projektet och uppnå de uppsatta målen har varit att använda PU-processen som har präglats i utbildningens olika projektarbeten. I planeringen av projektet har verktyg som WBS, PERT-schema, Gant-schema och projektmodell använts för att strukturera projektet. I förstudien har research, användarundersökning och analyser utförts för att samla kunskap och underlag till konceptframtagningsarbetet. Analyserna resulterade i en kravspecifikation som kan användas som ett underlag för utvärdering av genererade koncept. Även en mockup-modell av tak med fotränna har konstruerats för att underlätta testning och utvärdering av fysiska koncept-prototyper. Konceptframtagningsarbetet har utgjorts av idégenerering, konceptgenerering och konceptutvärdering. Idégenereringen baserades på tre idégenereringssessioner, en med ett gäng studenter, en med produktutvecklingsingenjörer på Semcon i Karlstad och en med uppdragsgivaren och kollega på Roofac. Utifrån idéerna genererades sedan CAD-modeller som användes till att generera koncept. Koncepten utvärderades sedan med hjälp av för- och nackdelslista och matris. Resultatet av utvärderingen blev tre slutgiltiga koncept. För att uppnå målet med att leverera en fysisk modell/prototyp att använda som uppvisningsmaterial under utställningen av projektet, avgränsades prototypframtagnings- och testningsarbetet med att gå vidare med den lämpligaste av de tre slutgiltiga koncepten. Från prototypframtagningen och testningen erhölls en fysisk modell av det koncept som valdes att gå vidare med efter konceptframtagningen. Denna modell användes tillsammans med en mockup-modell vid utställningen av projektet. Baserat på resultatet från förstudien, konceptframtagningen, prototypframtagningen samt mockupbygget har en kunskapsbank samt material erhållits att kunna använda i vidare arbeten. Utifrån detta anses därför att syftet med projektet vara uppfyllt.
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Rangfeldt, Alexander. "Självkänsla och Facebook : En kvantitativ enkätstudie". Thesis, Karlstads universitet, Institutionen för sociala och psykologiska studier (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-71961.
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Föreliggande studie är en kvantitativ enkätundersökning som ämnade att undersöka korrelationenmellan global självkänsla och facebookanvändande. Enkäten bestod av Rosenbergs Self-Esteem Scaleoch en egendesignad skala gjord för att mäta facebookanvändande. Enkäten skapades med hjälpSurvey and Report och resultatet analyserades sedan i SPSS där Pearsonsproduktmomentkorrelationskoefficient användes för att räkna ut korrelationen. Deltagarna valdes utgenom ett bekvämlighetsurval, då enkäten delades ut genom Facebook. Resultat visade att det intefinns en signifikant korrelation mellan facebookanvändande och självkänsla.Quantitative survey study about facebook usage and self-esteem. The study used the Rosenberg Self-Esteem Scale.
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Rahman, Tanvir. "Effects of MSW and RSFP on neutrino constraints and supernova dynamics". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ64434.pdf.
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Kwai, Kevin Kiah Wen. "An analysis of three-channel RSNS virtual spacing direction finding system". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FKwai.pdf.
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Thesis (M.S. in Combat Systems Science and Technology)--Naval Postgraduate School, December 2007.Thesis Advisor(s): Pace, Phillip E. ; Jenn, David C. ; Walters, Donald L. "December 2007." Description based on title screen as viewed on January 22, 2008. Includes bibliographical references (p. 73-74). Also available in print.
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Bakolo, Rodwell S. "Design and implementation of a RSFQ superconductive digital electronics cell library". Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17936.
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Thesis (MScEng)--Stellenbosch University, 2011.ENGLISH ABSTRACT: Rapid Single Flux Quantum (RSFQ) cells are key in the design of complex and applicable RSFQ electronic circuits. These cells are low-level circuit elements that are used repeatedly to build larger, applicable RSFQ circuitry. Making these cells simple to layout and manufacture, but reliable for extensive use demands a careful development process for RSFQ cells. Cell functionality is verified through simulations, thereafter the cell is laid out in special software packages. Inductance of on-chip superconductor structures is extracted through careful modelling with numerical field solver software. A cell library has been developed by incorporating existing or published cells after further analysis and optimization, as well as developing new cells. Cells that have been adapted into the library include the Josephson transmission line (JTL), Splitter, Merger, D-Flip Flop (DFF), T-Flip Flop (TFF), NOT, AND, OR and XOR, DC-SFQ and SFQ-DC and PTL Driver and Receivers. New cells include NOR, NAND and XNOR. The cells were designed for the IPHT’s RSFQ1D 1kA/cmª and Hypres’ 4.5kA/cmª processes. The cells in the library have good bias current operating margins obtained through simulations (> ±26%). All cells have all the parameters listed in the thesis including extracted inductance values. In order to have a complete and verified RSFQ cell library, cells have been sent for fabrication at IPHT and Hypres facilities. These cells can now be tested on-chip, in the laboratory, to establish functionality and practical bias current margins. All test signal patterns and bias currents required for testing are defined to allow co-workers or collaborators to test the cells.
AFRIKAANSE OPSOMMING: "Rapid Single Flux Quantum" (RSFQ) selle is van sleutelbelang in die ontwerp van komplekse en toepaslike RSFQ elektroniese stroombane. Hierdie selle is laevlak stroombaanelemente wat herhaaldelik gebruik word om groter RSFQ bane mee te bou. Versigtige ontwikkeling is nodig om hierdie selle eenvoudig vir uitleg en vervaardiging te hou terwyl dit ook betroubaar is vir wye gebruik. Selfunksionaliteit word geverifieer deur middel van simulasies, waarna selle vir vervaardiging uitgelê word in spesiale sagtewarepakette. Induktansie van supergeleierstrukture op vervaardigde skyfies word deur versigtige modellering met behulp van numeriese veldoplossingsagteware onttrek. In hierdie tesis is ’n selbiblioteek ontwerp deur bestaande (gepubliseerde) selle verder te analiseer en optimeer, en deur nuwe selle te ontwerp om die biblioteek volledig te maak. Selle wat aangepas is vir hierdie biblioteek sluit die Josephson-Transmissielyn (JTL), Verdeler, Samevoeger, DWipkring (DFF), T-Wipkring (TFF), NIE, EN, OF en XOF, asook die DC-SFQ en SFQ-DC selle en Passiewe Transmissielyn (PTL) drywers en ontvangers in. Nuwe selle sluit die NOF, NEN en XNOF hekke in. Die selle is ontwerp en uitgelˆe vir beide IPHT se RSFQ1D 1kA/cmª en Hypres se4.5kA/cmª prosesse. Die selle in die biblioteek toon goeie voorspanningstroom-werksmarges, soos verkry deur simulasie (> ±26%). Parameters en berekende induktansies vir alle selle word in die tesis gelys vir naslaandoeleindes. Vir die daarstel van ’n volledige en geverifieerde RSFQ selbiblioteek is selontwerpe vir vervaardiging na IPHT en Hypres gestuur. Aangesien vervaardiging slegs een maal per jaar by IPHT gedoen word, is die skyfies egter nog nie beskikbaar nie. Na vervaardiging kan die skyfies egter getoets word om selfunksionaliteit in die laboratorium te meet. Ten einde hierdie toetsing vir enige medewerker te vergemaklik, word alle toetsparameters soos voorspanningstroom en intreeseinpatrone in die tesis gedefinieer.
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Correia, Thiago de Almeida. "RSSF para detec??o de inc?ndios florestais em tempo real". Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/1012.
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Pontif?cia Universidade Cat?lica de Campinas ? PUC Campinas
This document presents a planning and communication strategy in wireless sensor networks for the real-time detection of forest fires. Wireless sensor networks, even being a low-cost technology, can be used for risk applications such as in the forest fire prevention and detection, effectively compared to other technologies more expensive. They can also be used in the monitoring of information that could contribute to diagnose the cause of a particular forest fire. The communication strategy was implemented in a wireless sensor network installed in a eucalyptus forest. In addition to the communication strategy, this project carried out a physical planning of the area, to locate the best points of installation of the sensor nodes. In both tests were used radio modules operating at 915 MHz. The geographic localization of each radio module was planned based on the intensity of the signal received by each module and considering its position within a mesh topology. The effectiveness of the communication strategy was measured through the PER and the average delay. The robustness of the strategy in case of radio module failure were also investigated and evaluated.
No presente trabalho ? apresentada uma estrat?gia comunica??o em redes de sensores sem fio para a detec??o em tempo real de inc?ndios florestais. Redes de sensores sem fios mesmo sendo uma tecnologia de baixo custo, podem ser utilizadas para aplica??es de risco como na preven??o e detec??o de inc?ndios florestais, de forma eficaz comparada com outras tecnologias mais caras. Elas tamb?m podem ser utilizadas na coleta de informa??es contribuindo em diagnosticar a causa de um determinado inc?ndio florestal. A estrat?gia de comunica??o foi implementada em uma rede de sensores sem fio instalada dentro de uma floresta de eucalipto. Al?m da estrat?gia de comunica??o este projeto realizou um planejamento f?sico da ?rea, para localizar os melhores pontos de instala??o dos n?s sensores. Para ambos os testes foram utilizados m?dulos de r?dio operando em 915 MHz. O posicionamento geogr?fico de cada m?dulo de r?dio foi planejado baseando-se na intensidade do sinal recebido por cada m?dulo e considerando o seu posicionamento dentro de uma topologia em malha. A efic?cia da estrat?gia de comunica??o foi mensurada atrav?s dos par?metros: taxa de perda de pacotes, atraso m?dio da coleta e processamento dos pacotes. A robustez da estrat?gia perante falhas do m?dulo de r?dio, tamb?m foi investigada e avaliada.
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Roberts, Brian J. "Site-specific RSS signature modeling for WiFi localization". Worcester, Mass. : Worcester Polytechnic Institute, 2009. http://www.wpi.edu/Pubs/ETD/Available/etd-050109-120008/.
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Thesis (M.S.)--Worcester Polytechnic Institute.Keywords: empirical database; WiFi localization; RSS; channel modeling; performance evaluation. Includes bibliographical references (leaves 110-111).
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Li, Qian, i Xintong Zhang. "Indoor and Outdoor Evaluation of Campus RSS Performance". Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9430.
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The focus of this thesis work is to evaluate the RSS (Received Signal Strength) Performance of the University of Gävle (HiG) based on IEEE 802.11 standards both indoor and outdoor. Authors investigated the issues of deploying access points for wireless local area networks in the library-2nd floor, building 99-4th floor and outdoor university campus. By using the program VisiWave Site Survey, Global Position System (GPS) and RSS sensor to analysis the received signal strength, throughput and radio map. The influence of the building material and distance for the signal strength and the throughput are done by investigating indoor environment. The results of investigation suggest that most parts of library-2nd floor and building 99-4th floor possess at least a good RSS performance. However, minority parts of these places have a poor RSS performance, and the new resolution of Access Points’ (AP) deployment for these poor-RSS-performance parts is provided. For the outdoor campus part, the RSS in the area which near the walls of building is satisfactory (Received Signal Strength Indication (RSSI) between -79.8 dBm and -57 dBm), however in the centre of outdoor campus the RSS is poor. Thus, the evaluation of APs deployment in HiG is achieved.
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Grigutis, Valdemaras. "Universalus žiniatinklio srautų aprašymo formatas". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080619_133430-62328.
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Žiniatinklio srautų technologija neseniai pradėjo augti, tačiau ji sparčiai išplito ir tapo dažnai sutinkama internetiniuose puslapiuose. Dabar yra trys pagrindiniai naudojimi žiniatinklio srauto formatai ATOM 1.0, RSS 2.0 ir RSS 1.0. Šiame darbe yra parašyta nauja žiniatinklio srautų specifikacija, kuri sujungia visus ATOM 1.0, RSS 2.0 ir RSS 1.0 formatus ir pridedami atitinkamai nauji elementai. Kad tai padaryti buvi išanalizuota ATOM 1.0, RSS 2.0 ir RSS 1.0 formatų architektūra. Universalaus žiniatinklio srautų architektūra realizuota sukurtame konvertavimo į universalų žiniatinklio srauto metode, kuris gali būti naudojamas projektuose. Sukurtas metodas verčia ATOM 1.0, RSS 2.0 ir RSS 1.0 formatų dokumentus į šiame darbe aprašytą universalų žiniatinklio srauto formatą ir normalizuoja jį. Rezultatai, gauti po ATOM 1.0, RSS 2.0 ir RSS 1.0 dokumentų konvertavimo į universalų žiniatinklio srauto formatą yra palyginti ir padarytos išvados.Feed technology has only just started growing, but it become very popular and can meet in most web pages. There is at least three major competing feed formats in ATOM 1.0, RSS 2.0 and RSS 1.0 . In this work is written new feed format specification, which joins all ATOM 1.0, RSS 2.0 and RSS 1.0 formats and includes new ones elements. To do this has been analysed ATOM 1.0, RSS 2.0 and RSS 1.0 architekture. Universal feed architekture realized in created universal feed parser method, which can be included in projects. Craeted method replaces ATOM 1.0, RSS 2.0 and RSS 1.0 documents into universal feed document and normalize them. Results got after converting ATOM 1.0, RSS 2.0 and RSS 1.0 feeds into universal feed document is compared and made conclusion.
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Snetler, Lukas Hendrick. "High-Temperature Superconductor Step-Edge Fabrication for the Implementation of RSFQ Circuits". Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1218.
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Quirino, Gustavo da Silva. "Análise arquitetural de algoritmos criptográficos assimétricos em plataformas embarcadas usadas em RSSF". Pós-Graduação em Ciência da Computação, 2013. https://ri.ufs.br/handle/riufs/3339.
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This work consists in a performance evaluating of Asymmetrical cryptographic algorithms in embedded platforms used in Wireless Sensor Networks (WSN). The sensor devices have low computing power and energy, therefore safety techniques should not consume large amounts of resources. The asymmetric cryptographic algorithms RSA, ECC and MQQ were evaluated on platforms Desktop, ARM, MSP430 and AVR. The evaluations were performed using the SimpleScalar simulators, Sim-Panalyzer, MSPsim and AVRORA . The evaluation criteria were: processing time, memory usage and processor, as well as energy consumption. The data showed that the algorithm MQQ was more efficient than RSA and ECC algorithms in most assessment criteria, in addition, the ECC algorithm obtained the best results when
compared with the RSA algorithmEsse trabalho consiste na avaliação de desempenho de algoritmos criptográficos assimétrico em plataformas embarcadas usadas em Redes de Sensores Sem Fio (RSSF). Os dispositivos sensores têm baixa capacidade computacional e energética, portanto técnicas de segurança não devem consumir grande quantidade de recursos. Os algoritmos criptográficos assimétricos RSA, ECC e MQQ foram avaliados nas plataformas Desktop, ARM, MSP430 e AVR. A avaliação de desempenho foi realizada com auxílio dos simuladores SimpleScalar, Sim- Panalyzer, MSPsim e AVRORA. Os critérios de avaliação foram: tempo de processamento, uso de memória e processador, além do consumo de energia. Os dados revelaram que o algoritmo MQQ foi mais eficiente que os algoritmos RSA e ECC na maioria dos critérios de avaliação, além disso, o algoritmo ECC obteve os melhores resultados quando comparado com o algoritmo RSA
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Paula, ?rika Capelli de. "Desenvolvimento e teste de RSSF para monitoramento de ambientes em edifica??es". Pontif?cia Universidade Cat?lica de Campinas, 2017. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/974.
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?RIKA CAPELLI DE PAULA.pdf: 5259838 bytes, checksum: 1d9b6fe276253a112ebacd6f7e2f3725 (MD5)Made available in DSpace on 2017-08-07T13:35:29Z (GMT). No. of bitstreams: 1 ?RIKA CAPELLI DE PAULA.pdf: 5259838 bytes, checksum: 1d9b6fe276253a112ebacd6f7e2f3725 (MD5) Previous issue date: 2017-06-30
Pontif?cia Universidade Cat?lica de Campinas ? PUC Campinas
The necessity to monitor the greatness related to the comfort of internal environments of buildings, aiming to provide well-being to its occupants, made one think of a solution using Wireless Sensor Network (WSN). This research project proposes the construction of a WSN, with the elements Base, Sensor Node and Repeater, and methods, of verification and distribution of these elements, that aim at the monitoring of greatness related to the comfort of indoor environments, in an urban context. For proof of concept of what was proposed and verification of the behavior of the network, measurements of Temperature, Relative Humidity (RH) and Signal Strength Indication (RSSI) were collected, the latter being the focus of analysis at work, the Which allowed the adaptation of the WSN to allow the distance between the Base and the environment monitored by the Sensor Nodes. The tests were divided into two parts, the first one to validate the components, sectoral antenna Antenna and SHT75 sensor, and the second one to collect measurements, in the internal environment of a library. Through the tests, it was verified, through the observation of the signal intensity behavior, the operation of the WSN and the fulfillment of the proposal.
A necessidade do monitoramento de grandezas relacionadas ao conforto de ambientes internos de edifica??es, visando proporcionar bem-estar a seus ocupantes, fez com que se pensasse em uma solu??o utilizando Rede de Sensores Sem Fio (RSSF). Este projeto de pesquisa prop?e a constru??o de uma RSSF, com os elementos Base, N? sensor e Repetidor, e metodologia, de verifica??o e distribui??o desses elementos, que visam o monitoramento de grandezas relacionadas ao conforto de ambientes indoor, em um contexto urbano. Para prova de conceito do que foi proposto e verifica??o do comportamento da rede, foram coletadas medidas de temperatura, Umidade Relativa (UR) e intensidade do sinal (RSSI - Received Signal Strength Indication), sendo a ?ltima o foco de an?lise no trabalho, o que permitiu a adequa??o da RSSF para possibilitar o distanciamento entre a Base e o ambiente monitorado pelos N?s sensores. Os ensaios foram divididos em duas partes, a primeira para valida??o dos componentes, antena Path setorial e sensor SHT75, e a segunda para coleta de medidas, no ambiente interno de uma biblioteca. Atrav?s dos ensaios realizados, foi comprovado, atrav?s da observa??o do comportamento da intensidade do sinal, o funcionamento da RSSF e o atendimento da proposta.
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Steiner, Rodrigo Vieira. "Uma Proposta de framework para a geração de protocolos MAC para RSSF". reponame:Repositório Institucional da UFSC, 2013. https://repositorio.ufsc.br/handle/123456789/107156.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência da Computação, Florianópolis, 2013.Made available in DSpace on 2013-12-05T23:22:33Z (GMT). No. of bitstreams: 1 317555.pdf: 2759939 bytes, checksum: ed32f4aefa0cb15eb6310f54096f6100 (MD5) Previous issue date: 2013
Redes de sensores sem fio são altamente dependentes de protocolos de controle de acesso ao meio para fazer uso efetivo dos poucos recursos disponíveis em seus nós sensores. Entretanto a maioria das otimizações propostas nos protocolos existentes focam em segmentos específicos do espaço de projeto. O que é considerado como uma otimização por uma classe de aplicações pode representar uma forte limitação para outras. Um protocolo com o objetivo de cobrir uma ampla fração do universo de aplicações de redes sensores deve apresentar algum mecanismo de configurabilidade ou adaptabilidade. Nesse sentido surgiu o Configurable Medium Access Control (C-MAC) (WANNER; OLIVEIRA; FROHLICH, 2007). O C-MAC funciona como um framework de estratégias de controle de acesso ao meio, as quais podem ser combinadas para produzir protocolos específicos de aplicação. Através desse paradigma, programadores de aplicações podem criar novos serviços de comunicação sob demanda e experimentar diferentes parâmetros de comunicação, coletando métricas para identificar e ajustar o protocolo às suas necessidades. Contudo, a arquitetura original do C-MAC fornece um baixo reuso de seus componentes em software, dificultando e reduzindo sua configurabilidade. Esta dissertação apresenta a proposta, implementação e avaliação de uma nova arquitetura para o framework C-MAC. Através de uma análise das diferentes categorias de protocolos MAC para redes de sensores, foram identificadas características comuns e especificidades desses protocolos que foram consideradas no desenvolvimento do novo C-MAC. Além disso, o que era um único grande componente na arquitetura original, foi separado em diferentes microcomponentes e novos microcomponentes foram incluídos de forma a suportar mais funcionalidades. Dessa forma, a arquitetura proposta possibilita um maior reuso de seus componentes em software, fornecendo maior configurabilidade e, consequentemente, suportando mais aplicações.
Abstract : Wireless sensor networks are highly dependent on medium access controlprotocols to make effective use of the few resources available on sensor nodes.Nevertheless, most of the optimizations proposed by existing protocols focuson specific segments of the design space. What is considered an optimizationby one class of applications can represent a strong limitation for others.A protocol aiming at covering a large fraction of the application universefor sensor networks must feature configuration or adaptation mechanisms.Therefore, the Configurable Medium Access Control (C-MAC) wascreated (WANNER; OLIVEIRA; FROHLICH, 2007). C-MAC is realized asa framework of medium access control strategies that can be combined toproduce application-specific protocols. Through this paradigm, applicationprogrammers can create new communication services on demand and experimentwith different communication parameters, collecting metrics to identifyand adjust the protocol to match their applications? requirements. Nonetheless,C-MAC original architecture provides low reuse of software components,hindering its configurability.This dissertation presents the proposal, implementation, and evaluation ofa new architecture for the framework C-MAC. Through the analysis of thedifferent categories of MAC protocols for sensor networks, common characteristicsand specificities of these protocols were identified and used in thedevelopment of the new C-MAC. Thus, the proposed architecture enables agreater reuse of its software components, providing greater configurabilityand, consequently, supporting a wider range of applications.
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Boavida, Nuno Alexandre de Freitas. "Pesquisa segura de dados em redes de sensores". Master's thesis, Faculdade de Ciências e Tecnologia, 2010. http://hdl.handle.net/10362/4852.
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de
Lisboa para a obtenção do Grau de Mestre em
Engenharia InformáticaO suporte de programação para Redes de Sensores sem Fios (RSSF) requer, cada vez mais, a consolidação de serviços intermédios (i.e. middleware) que forneçam abstracções interessantes para a produção de aplicações mais complexas do ponto de vista da heterogeneidade e da segurança. Estas abstracções devem incorporar garantias associadas a critérios de segurança das comunicações, tais como: autenticação, confidencialidade e integridade dos dados transmitidos e processados pela rede, bem como devem garantir intrinsecamente mecanismos de resistência face a ataques por intrusão. A presente dissertação tem em vista propor, conceber, implementar e testar experimentalmente uma arquitectura de serviços middleware para organização de RSSF em torno de um conceito inovador: o de auto-organização baseada em vizinhanças lógicas seguras. Trata-se de disponibilizar uma abstracção de programação inspirada na noção de espaços de tuplos partilhados, aplicada ao desenvolvimento de aplicações para RSSF. A ideia tem em vista suportar aplicações orientadas à gestão e processamento interno seguro de dados (que se poderiam designar por secure data-centric ad-hoc sensor networked applications). Com base na pilha de serviços proposta, pretende-se elevar o conceito de proximidade física (mais associado aos critérios usuais de autoorganização das RSSF) para uma noção de proximidade lógica. Esta noção permite refinar ou optimizar processos de auto-organização orientada pelas aplicações, partindo de critérios que podem estar associados a propriedades de segurança e requisitos de heterogeneidade subjacentes ao nível dos serviços middleware a disponibilizar. Este trabalho possui como motivação principal colmatar a lacuna de segurança existente em aproximações ao paradigma de vizinhanças lógicas, presentes na investigação recente das RSSF. Com base em propostas que introduziram e implementaram recentemente essa noção, estabelecida pela organização da rede com base em espaços de tuplos partilhados, pretende-se estender a ideia para a noção de "Vizinhanças Lógicas Seguras" (VLS). A principal contribuição do trabalho passa por permitir a simplificação da produção de aplicações críticas de segurança, possibilitando a definição e utilização das RSSF como repositórios confiáveis de sequências elementares de campos tipificados,vistos como conjuntos de espaços seguros de tuplos, definidos e utilizados de forma transparente pelas aplicações. Foi implementado e testado um protótipo experimental, concebido na linguagem NesC e em ambiente TinyOS, do qual se validaram as métricas de latência nas comunicações, coerência dos espaços de tuplos e consumo de energia, e que, adicionalmente, foi colocado em vários ambientes hostis de teste a ataques de retransmissão, omissão, integridade e comportamento arbitrário.
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Li, Zeyuan. "Target localization using RSS measurements in wireless sensor networks". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31356.
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The subject of this thesis is the development of localization algorithms for target localization in wireless sensor networks using received signal strength (RSS) measurements or Quantized RSS (QRSS) measurements. In chapter 3 of the thesis, target localization using RSS measurements is investigated. Many existing works on RSS localization assumes that the shadowing components are uncorrelated. However, here, shadowing is assumed to be spatially correlated. It can be shown that localization accuracy can be improved with the consideration of correlation between pairs of RSS measurements. By linearizing the corresponding Maximum Likelihood (ML) objective function, a weighted least squares (WLS) algorithm is formulated to obtain the target location. An iterative technique based on Newtons method is utilized to give a solution. Numerical simulations show that the proposed algorithms achieves better performance than existing algorithms with reasonable complexity. In chapter 4, target localization with an unknown path loss model parameter is investigated. Most published work estimates location and these parameters jointly using iterative methods with a good initialization of path loss exponent (PLE). To avoid finding an initialization, a global optimization algorithm, particle swarm optimization (PSO) is employed to optimize the ML objective function. By combining PSO with a consensus algorithm, the centralized estimation problem is extended to a distributed version so that can be implemented in distributed WSN. Although suboptimal, the distributed approach is very suitable for implementation in real sensor networks, as it is scalable, robust against changing of network topology and requires only local communication. Numerical simulations show that the accuracy of centralized PSO can attain the Cramer Rao Lower Bound (CRLB). Also, as expected, there is some degradation in performance of the distributed PSO with respect to the centralized PSO. In chapter 5, a distributed gradient algorithm for RSS based target localization using only quantized data is proposed. The ML of the Quantized RSS is derived and PSO is used to provide an initial estimate for the gradient algorithm. A practical quantization threshold designer is presented for RSS data. To derive a distributed algorithm using only the quantized signal, the local estimate at each node is also quantized. The RSS measurements and the local estimate at each sensor node are quantized in different ways. By using a quantization elimination scheme, a quantized distributed gradient method is proposed. In the distributed algorithm, the quantization noise in the local estimate is gradually eliminated with each iteration. Simulations show that the performance of the centralized algorithm can reach the CRLB. The proposed distributed algorithm using a small number of bits can achieve the performance of the distributed gradient algorithm using unquantized data.
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Hindmarch, Ian. "Localisation using RSS(D) and site-specific propagation modelling". Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707748.
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Rodrigues, Ivo André Lopes. "Distribuição segura de chaves criptográficas em redes de sensores sem fios de grande escala: estudo e avaliação experimental em ambiente de simualação". Master's thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/5884.
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Dissertação de Mestrado em Engenharia InformáticaO objectivo da presente dissertação tem em vista conceber, implementar e testar um ambiente de simulação para redes de sensores sem fios de grande escala. Pretende-se que o ambiente possa ser usado para aferir e comparar, numa base experimental e de forma sistemática, as características de diferentes protocolos de distribuição de chaves par-a-par, baseados em esquemas de auto-organização aleatória da rede. O ambiente de simulação é baseado num núcleo de eventos discretos e serviços de suporte de acordo com a pilha IEEE802.15.4 para sensores TinyOS. O ambiente de simulação inclui um modelo de comunicação por radiofrequência e mecanismos de detecção e controlo de colisões, conforme a especificação de referência de controlo de acesso ao meio (MAC) da norma IEEE802.15.4 ou Zigbee. O ambiente de simulação utilizado constitui uma ferramenta genérica para análise comparativa de protocolos de distribuição e estabelecimento de chaves criptográficas. Para tal possibilita análise de efectividade desses protocolos em relação aos seguintes critérios: condições de cobertura e conectividade efectiva da rede; latência da disseminação de dados bem como estabilização do processo de estabelecimento de chaves de acordo com a topologia gerada; condições de fiabilidade propiciadas pela topologia formada; impacto energético dos protocolos; e avaliação da eficácia dos mesmos face à projecção de ataques internos que sejam desencadeados a partir de intrusões em diferentes nós. No âmbito da dissertação foram estudados protocolos que constituem referências da investigação na área dos protocolos de distribuição e estabelecimento de chaves para redes de sensores sem fios. Os resultados e contribuições da dissertação permitem complementar a literatura e a análise prévia desses protocolos com base em observações experimentais. Estas observações permitem uma análise crítica da sua comparação ou validação face a condições aproximadas a condições reais de operação. Os resultados da dissertação permitem assim complementar condições teóricas avançadas anteriormente na literatura com resultados mais próximos de condições reais de desempenho desses protocolos, nomeadamente em redes de grande escala operando de forma não supervisionada. Esta avaliação complementar constitui uma contribuição relevante para uma compreensão mais completa, sistemática e abrangente do funcionamento desses protocolos, em condições que não tinham ainda sido avaliadas anteriormente.
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McIvor, Morag Catriona. "Soviet policy towards the new territories of the RSFSR, circa 1939 to 1953". Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610572.
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Arslan, Erdal. "Extending the dynamic range of a photonic RSNS ADC using a segmentation approach". Thesis, Monterey, California. Naval Postgraduate School, 2011. http://hdl.handle.net/10945/5492.
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Approved for public release; distribution is unlimited.The trend in high-performance digital receivers is to configure the analog-to-digital converter (ADC) directly after the antenna and low noise amplifier. Direct digitization of wideband antenna signals can be realized using Mach-Zehnder interferometers (MZI) to efficiently fold the RF signal into the optical domain. The robust symmetrical number system (RSNS) is a modular scheme formed using N ? 2 integer sequences and insures that any two successive vectors or paired terms from all N sequences differ by only one integer (integer Gray code property). A photonic ADC preprocessing architecture using the RSNS uses a modulus i m number of comparators at the output of each MZI/photodetector. The total number of comparators with a logic ?1? in each channel represents the integer values within each RSNS sequence. The dynamic range
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Quiles, Rolando. "Challenges of implementing RSS barcodes on hospital unit dose blisters /". Online version of thesis, 2007. http://hdl.handle.net/1850/5468.
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Human, Stacey. "Targeted inhibition of arbovirus replication in mosquito cells". Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/25899.
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Arthropod-borne viruses (arboviruses) belonging to the Togaviridae, Flaviviridae and Bunyaviridae pose a significant threat to human and animal health worldwide. Many of these (re-)emerging viruses have increased in geographic range and severity. Developing vaccine strains of these viruses that cannot infect, or be transmitted by, mosquito vectors would be useful tools to block virus transmission cycles in their vectors. Exploiting the miRNA pathway to generate viruses that are attenuated, or restricted in their replication, has recently received much attention due to the site-specific expression of miRNAs within a host organism. Recently it has been shown for a number of single-stranded and segmented viruses, that virus spread can be restricted in a cell- or tissue-specific manner by engineering miRNA recognition elements (MREs), which are complementary to cellular or tissue-specific miRNAs, into the virus genome. The aim of this proof-of-principle study was to generate recombinant Semliki Forest viruses (rSFVs) that are unable to replicate in aedine mosquito cell lines. RNA was extracted from uninfected and SFV4-infected Aag2 (Ae. aegypti) and U4.4 (Ae. albopictus) cells and analysed using high-throughput Illumina Solexa sequencing in order to identify mosquito-specific miRNAs. Several of the most highly abundant mosquito-specific miRNAs were selected and MRE cassettes were designed. MRE cassettes were cloned into the SFV4 backbone to produce rSFV, which were able to replicate in mammalian BHK-21 cells but unable to replicate in mosquito-derived cells. Each cassette encoded a Gaussia luciferase (Gluc) reporter gene and four copies of each MRE under the control of a duplicated subgenomic promoter. The resulting viruses were viable, infectious and were used to determine the effect of mosquito-specific MREs on virus replication. A significant reduction was observed in both luciferase (~4 – 5 logs) and virus (~3 logs) production in mosquito cells infected with the rSFVs. Further characterisation of the three most inhibited rSFVs (SFV4-MRE276, SFV4-MRE2940 and SFV4-MRE2945) suggested that the insertion of the MRE cassette into the SFV4 backbone had no significant effect on the growth kinetics of these viruses. Each virus replicated to titres comparable to wildtype (wt) SFV. In stability assays, the rSFVs virus maintained high luciferase expression and high virus titre for 5 low multiplicity passages in mammalian cells. Taken together, these results suggest that the incorporation of MRE cassettes into the SFV4 genome did not affect the stability of, or ability for, these recombinant viruses to replicate, efficiently in a mammalian system. rSFV stability in mosquito cells is questionable as luciferase expression was not maintained over 5 low multiplicity passages in these cells. In order to take this work forward, characterisation of the rSFVs in various mosquito species is required in order to determine whether or not these results are replicated in vivo. In order to apply this technology to a virus that is economically important, the three most effective MREs were cloned into an attenuated Rift Valley Fever virus (RVFV) strain, MP12. The Gluc reporter was removed from the MRE cassettes due to size constraints of the RFVF plasmids. Modified MRE cassettes were cloned into the S and L segments, specifically into the 3’ untranslated regions (UTRs) of the NSs and L genes, to generate single or double rRVFV mutants. All viruses were rescued and were viable. Infected cells displayed cytopathic effect characteristic of RVFV-infected cells. Single S segment mutant viruses reached similar titres to, and took the same amount of time to rescue as, wtRVFV. L segment and double segment mutants (recombinant viruses with MREs in both the S and L segments) reached titres two logs lower and took two days longer to rescue than wtRVFV. This suggests that the incorporation of the MRE cassettes into the L segment UTR is affecting virus transcription or translation in some way. Unfortunately, due to time constraints, further characterisation of these viruses could not be carried out. The technology described here may provide an innovative way to create environmentally contained vaccines that are no longer transmitted by their mosquito vectors.
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Yeh, ShihYuan. "Development of a digital tracking array with single-channel RSNS and monopulse digital beamforming". Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/4956.
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Approved for public release; distribution is unlimitedUnmanned aerial vehicles (UAVs) are widely used in military applications, and one of the most common missions is remote sensing. Remote sensing requires UAVs equipped with different kinds of sensors. Information collected by remote sensors must be transmitted back to a ground control station (GCS) to conduct analysis. The majority of UAVs are controlled directly by GCS personnel using radio frequency (RF), line-of-sight (LOS) links. The ground antenna must acquire and then track the UAV signal. A digital phased array allows signal processing functions to be performed in the antenna processor as well as beamforming and tracking. The development of a digital tracking array with single-channel robust symmetrical number system (RSNS) and monopulse digital beamforming (DBF) to track a UAV's transmitted signal is described in this thesis. The RSNS is used as the direction finding (DF) algorithm and can provide high angle resolution with two closely spaced elements. However, as is typical for an array, the angle accuracy is reduced at the two ends of the field-of-view (FOV). The monopulse DBF is used to precisely track the signals. The monopulse tracking technique provides precise angle accuracy within a FOV of approximately ±45. The tracking system is developed in LabView, and the performance of a six-element prototype array is demonstrated by measurement in an anechoic chamber.
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Dalinger, Andrej [Verfasser]. "Der Vertragsbruch des Berufsfußballspielers und die Rechtsfolgen nach Art. 17 FIFA-RSTS / Andrej Dalinger". Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2017. http://d-nb.info/1160315353/34.
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Konen, Timo [Verfasser]. "One-step RESOLFT with a positively switchable RSFP with improved deactivation kinetics / Timo Konen". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1218780800/34.
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Morais, Gustavo Iervolino de. "Avalia??o das perturba??es eletromagn?ticas radiadas de equipamentos eletrodom?sticos na RSSF". Pontif?cia Universidade Cat?lica de Campinas, 2018. http://tede.bibliotecadigital.puc-campinas.edu.br:8080/jspui/handle/tede/1103.
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Household appliances are not certified to be marketed in Brazil as regards emission aspects of electromagnetic disturbance, which may affect the functionalities of telecommunications systems, as well as the advancement of technologies, such as IoT (Internet of Things), being the WSN widely used within Iot, due to its flexibility and the low cost. This work evaluates the levels of electromagnetic disturbances generated by household appliances and how much these disturbances can affect the functioning of WSN. The work was divided in 3 stages and in all of them the Semi-Anechoic Chamber was used, being the first stage the evaluation of the electromagnetic disturbances of the household appliances, if they meet the normative requirements used in Europe, secondly a characterization of the WSN, being evaluated the RSSI and the PER, and finally the appliance with the highest interfering level was placed with the WSN to evaluate RSSI and PER. The results showed that the household appliances do not meet the normative limits and significantly affect the functioning of an WSN.
Os equipamentos eletrodom?sticos n?o possuem certifica??o para serem comercializados no Brasil quanto aos aspectos de emiss?o de perturba??o eletromagn?tica o que pode afetar as funcionalidades dos sistemas de telecomunica??es, bem como o avan?o de tecnologias, como por exemplo, o IoT (Internet das coisas), sendo a RSSF amplamente utilizada dentro de Iot, devido sua flexibilidade e o baixo custo. Este trabalho avalia os n?veis das perturba??es eletromagn?ticas geradas pelos equipamentos eletrodom?sticos e o quanto estas perturba??es podem afetar o funcionamento de RSSF. O trabalho foi dividido em 3 etapas e em todas elas foram utilizadas a C?mara Semi-anec?ica, sendo a primeira etapa a avalia??o das perturba??es eletromagn?ticas dos equipamentos eletrodom?sticos, se atendem aos requisitos normativos utilizados na Europa, em segundo uma caracteriza??o da RSSF, sendo avaliado a RSSI e a PER, e por ?ltimo o eletrodom?stico com maior n?vel interferente foi colocado junto a RSSF para avalia??o de RSSI e da PER. Os resultados obtidos demonstraram que os equipamentos eletrodom?sticos n?o atendem aos limites normativos e afetam significativamente o funcionamento de um RSSF.
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Ndima, Nombeko Lungelwa Velile. "The dimensionality of the Rosenberg Self-Esteem Scale (RSES) with South African University Students". Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61369.
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The Rosenberg Self-Esteem Scale (RSES) has been the subject of widespread debate over the years. Initially conceptualised by Rosenberg as a undimensional measure of global self-esteem, other studies have found evidence that challenges this notion, suggesting that this scale is in fact a multidimensional measure. The aim of this study was to investigate the construct validity of the RSES among South African university students. The RSES was administered to students from two different South African universities located in different regions (N = 304). Principal component analysis (PCA) was used in order to investigate the factor structure of the RSES and correlations were run between the RSES and the General Self-Efficacy Scale (SGSES) to investigate the relationship between self-esteem and self-efficacy. The PCA findings yielded a single factor structure of the RSES in the South African university student sample and a significant positive correlation was observed between self-esteem and self-efficacy. The findings therefore supported the construct validity of the RSES within the South African university context.Mini Dissertation (MA)--University of Pretoria, 2017.
Psychology
MA
Unrestricted
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Li, Mengchan. "Spatial wireless connectivity prediction for mobile robots". Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183086.
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Mobile robots, either autonomous or tele-operated have the potential of assisting humans in various situations such as during natural disasters, Urban Search and Rescue (USAR) efforts, and in Explosive Ordinance Disposal (EOD). These robots need steady wireless connectivity with their base station for control and communication. On one hand, the wireless link has to be managed to maintain a stable high quality network connection. On other hand, wireless connection should be continuously monitored to foresee network failure or inadequate link quality situations caused by entering access with low signal strength. This thesis focus on the later where we aim to address the prediction of wireless network connectivity for mobile robots. To indicate wireless connection quality, we use the Radio Signal Strength (RSS) parameter which is readily available by most wireless devices, and it has been frequently used in the literature to indicate wireless connection quality as the RSS have direct relation to the network throughput. Thus the focus of this thesis is to predict the RSS in future robot positions with reference to the current position of the robot. The solution is not straight forward because of the challenging nature of the radio signal propagation which involves complex phenomena such as path loss, shadowing and multipath fading. The RSS prediction method designed in this thesis has two stages. In the first stage, we estimate the location of radio signal source using an RSS gradient-based approach that can work in both single and multiple receivers arrangements. This information will be applied in the next prediction stage. For RSS prediction, we make use of Gaussian Process Regression (GPR) due to non-parametric nature, robustness to noise in the RSS data and changes in the environment. We validate our design with extensive experiments conducted using different types of mobile robots and wireless devices in indoor and outdoor environments, and under line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. We are able to achieve results with source localization error of up to 2 meters for indoor and 5 meters for outdoor environment. In terms of RSS prediction, we obtain the mean absolute prediction error of less than 5 dBm on average, for prediction within 5 meters in indoor environment and 20 meters in outdoor environment. The work is not only promising in terms of prediction time and accuracy but also outperform the state-of-the-art (SOTA) methods including the GPR algorithm, the Kriging interpolation method and the linear regression approaches.
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Hatami, Ahmad. "Application of channel modeling for indoor localization using TOA and RSS". Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-053106-160141/.
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Hmedeh, Zeinab. "Indexation pour la recherche par le contenu textuel de flux RSS". Phd thesis, Conservatoire national des arts et metiers - CNAM, 2013. http://tel.archives-ouvertes.fr/tel-00968604.
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Afin de réduire l'intervalle de temps nécessaire entre la publication de l'information sur le Web et sa consultation par les utilisateurs, les sites Web reposent sur le principe de la Syndication Web. Les fournisseurs d'information diffusent les nouvelles informations à travers des flux RSS auxquels les utilisateurs intéressés peuvent s'abonner. L'objectif de la thèse est de proposer un système de notification passant à l'échelle du Web, prenant en considération le grand nombre d'utilisateurs et le débit élevé d'items. Nous proposons un index basé sur les mots-clés des requêtes utilisateurs permettant de retrouver ceux-ci dans les items des flux. Trois structures d'indexation de souscriptions sont présentées. Un modèle analytique pour estimer le temps de traitement et l'espace mémoire de chaque structure est détaillé. Nous menons une étude expérimentale approfondie de l'impact de plusieurs paramètres sur ces structures. Pour les souscriptions jamais notifiées, nous adaptons les index étudiés pour prendre en considération leur satisfaction partielle. Afin de réduire le nombre d'items reçus par l'utilisateur, nous intégrons une deuxième phase de filtrage par nouveauté et diversité considérant l'ensemble d'items déjà reçus par l'utilisateur.