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Dissertations / Theses on the topic 'M CODES'

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Published: 4 June 2021
Last updated: 16 February 2022

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1

Tingxian, Zhou, HOU LIKUN, and XU BINGXING. "The Error-Correcting Codes of The m-Sequence." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613419.

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International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The paper analyses the properties of m-sequence error-correcting codes when adapting the correlation detection decoding method, deduces the error-tolerant number formula of binary sequence with a good auto-correlation property being used as error-correcting codes, provides with a method to increase the efficiency of the m-sequence error-correcting codes and make its coding and decoding procedures in the form of framed figures.
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2

VIEIRA, NETO ANTONIO S. "Rally-m: Um sistema computacional para a analise de confiabilidade." reponame:Repositório Institucional do IPEN, 1988. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9909.

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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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3

M'Sir, Mohamed El Amine. "Conception d'architectures rapides pour codes convolutifs en télécommunications : application aux turbo-codes." Metz, 2003. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2003/Msir.Mohamed.El.Amine.SMZ0315.pdf.

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En télécommunication, l'intégration des services et la diversité des données échangées (voix, vidéo, cellules ATM, etc. ) exigent des systèmes de plus en plus rapides pour traiter des volumes d'information en augmentation constante, tout en conservant des délais d'attente les moins contraignants possibles pour l'utilisateur, ces deux contraintes liées au traitement de l'information s'ajoute la nécessité de protéger les données émises dans des canaux soumis à des bruits perturbateurs. De la qualité du service (QoS) rendu en termes de communication, quelles que soient les conditions de transmission, se dégagent deux mots clés : fiabilité et rapidité. Le travail de cette thèses fait partie d'un projet global mené dans le laboratoire LICM concernant la conception architecturale d'une chaîne de transmission à haut débit et à faible coût. Coût. Ce travail se situe dans le cadre d 'un contrat CIFRE entre le laboratoire LICM et la société 2 MG Communication. L'objectif est de concevoir une architecture rapide pour un système de codage de faible coût et à haut débit permettant une protection optimale des données. Une étude approfondie sur les stratégies de codage canal dans le domaine des télécommunications a été effectuée. Il en ressort que les stratégies FEC (Forward Error Correction) offrent les meilleurs compromis débit/protection. L'emploi de codes convolutifs est l'une des approches F EC les plus répandues : la possibilité de les utiliser, soit comme entités indépendantes soit dans des structures concaténées avec d'autres codes, soit encore comme éléments constituants de turbo-codes( techniques de codage offrant actuellement les meilleurs niveaux de protection), les rend très attractifs. A partir de ce constat, quatre types d'architecture de codeurs convolutifs ainsi qu'une architecture de tubo-codeur ont été développés au niveau RTL et validés sur FPGA. Les résultats obtenus sont compris, pour le codeur convolutif haut débit, entre 1 et 7. 45 Gbits/s pour des degrés de parallélisme 8 et 32, respectivement. Dans le cas du turbo-code,I 'implantation d 'un turbo-codeur à deux niveaux avec un rendement 1/3 a permis d 'atteindre des débits compris entre 1 et 2 Gbits/s et entre 3 et 5 Gbits/s pour des degrés de parallélisme de 8 et 32, respectivement. L'étude a été complétée par le développement d'un décodeur de syndrome pour codes convolutifs,exploitant l'architecture parallèle du codeur haut débit, qui a permis d'atteindre des débits de 4. 78 Gbits/s pour un rendement de 1/2
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4

Licona-Nunez, Jorge Estuardo. "M-ary Runlength Limited Coding and Signal Processing for Optical Data Storage." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5195.

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Recent attempts to increase the capacity of the compact disc (CD) and digital versatile disc (DVD) have explored the use of multilevel recording instead of binary recording. Systems that achieve an increase in capacity of about three times that of conventional CD have been proposed for production. Marks in these systems are multilevel and fixed-length as opposed to binary and variable length in CD and DVD. The main objective of this work is to evaluate the performance of multilevel ($M$-ary) runlength-limited (RLL) coded sequences in optical data storage. First, the waterfilling capacity of a multilevel optical recording channel ($M$-ary ORC) is derived and evaluated. This provides insight into the achievable user bit densities, as well as a theoretical limit against which simulated systems can be compared. Then, we evaluate the performance of RLL codes on the $M$-ary ORC. A new channel model that includes the runlength constraint in the transmitted signal is used. We compare the performance of specific RLL codes, namely $M$-ary permutation codes, to that of real systems using multilevel fixed-length marks for recording and the theoretical limits. The Viterbi detector is used to estimate the original recorded symbols from the readout signal. Then, error correction is used to reduce the symbol error probability. We use a combined ECC/RLL code for phrase encoding. We evaluate the use of trellis coded modulation (TCM) for amplitude encoding. The detection of the readout signal is also studied. A post-processing algorithm for the Viterbi detector is introduced, which ensures that the detected word satisfies the code constraints. Specifying the codes and detector for the $M$-ary ORC gives a complete system whose performance can be compared to that of the recently developed systems found in the literature and the theoretical limits calculated in this research.
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5

CINTRA, FELIPE B. de. "Avaliacao da metodologia de calculo de dose em microdosimetria com fontes de eletrons com o uso do codigo MCNP5." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9619.

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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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6

Olivier, James L. "Concurrent error detection in arithmetic processors using [absolute value of] g3N [subscript m] codes /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487597424135791.

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7

Pfister, Henry D. "On the capacity of finite state channels and the analysis of convolutional accumulate-m codes /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3091203.

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8

Al'Miev, Il'dar Rifovich. "Simulations of photopumped x-ray lasers." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365883.

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9

DECCO, CLAUDIA C. G. "Analise temporal das oscilacoes espaciais de xenonio em reatores de pequeno porte." reponame:Repositório Institucional do IPEN, 1997. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10683.

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Dissetacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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10

Schmidt, Kai-Uwe. "On spectrally bounded codes for multicarrier communications." Dresden Vogt, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=2973482&prov=M&dok_var=1&dok_ext=htm.

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11

Spyridis, Konstantinos. "Hybrid hard and soft decision decoding of Reed-Solomon codes for M-ARY frequency-shift keying." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FSpyridis.pdf.

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Thesis (Electrical Engineer and M.S. in Electrical Engineering)--Naval Postgraduate School, June 2010.
Thesis Advisor(s): Robertson, R. Clark; Second Reader: Kragh, Frank; Cristi, Roberto. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Hybrid Reed-Solomon (RS) coding, Orthogonal signaling, Additive White Gaussian Noise (AWGN), Pulse-Noise Interference (PNI), coherent detection, noncoherent detection. Includes bibliographical references (p. 101-103). Also available in print.
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12

Santos, Nubia dos Santos Rosa Santana dos. "M-ROAMIN : um modelo para representação de objetos de aprendizagem multimodais interativos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/87980.

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O acesso aos conteúdos educacionais pode ser realizado usando diferentes tecnologias tais como, o computador, a Internet, os dispositivos móveis, TV interativa, entre outras, cada qual com diferentes restrições e, principalmente, potencialidades. Diante dessas possibilidades de acesso ao conteúdo educacional, deve-se atentar para a elaboração de conteúdos que possam ser acessados por diferentes meios, independente de local ou situação, visando à mobilidade e interatividade do conteúdo. As tecnologias e o advento da Internet permitiram a educação ubíqua e o surgimento de Ambientes Virtuais de Aprendizagem, mas alguns problemas surgem quando o usuário não está conectado. Nesse contexto, esta tese apresenta um modelo para representação de OAs, utilizando diferentes recursos, inclusive a mídia impressa como um meio alternativo de interação e/ou entrada para outros dispositivos com o objetivo de favorecer a aprendizagem, mesmo quando o usuário não possuir uma conexão ativa ou equipamento digital à sua disposição. Como alternativa de integração de recursos criou-se o modelo M-ROAMIN (Modelo para Representação de Objetos de Aprendizagem Multimodais Interativos) voltado para a materialização de OAM usando a tecnologia de códigos 2D e aplicação dos princípios da Aprendizagem Multimídia, bem como requisitos para elaboração de conteúdo instrucional, o qual pode ser utilizado no ensino a distância ou presencial. Metadados foram analisados para representar o OAM do modelo e regras foram criadas com o intuito de facilitar a materialização do conteúdo de acordo com a necessidade e meio de acesso. Ao finalizar as etapas de desenvolvimento das aplicações e materialização do OAM, o modelo foi validado com turmas de Graduação e Ensino Médio. Os resultados obtidos nos experimentos indicam os benefícios do modelo como alternativa para facilitar o acesso ao conteúdo educacional com mobilidade e interatividade.
The access to educational content can be performed using different technologies such as the computer, the Internet, mobile devices, interactive TV, among others, each with different restrictions and potential. Considering these possibilities of access to educational content, should to develop contents that can be accessed by different means, independent of place or situation, aiming to mobility and interactivity content. The technologies and the advent of Internet enabled ubiquitous education and the emergence of virtual learning environments, but some problems arise when the user is not logged. In this context, this thesis presents a model for representing LO, using different resources, including printed media as an alternative means of interaction and / or other input devices to provide learning, even when the user does not have an active connection or equipment digital at your disposal. Thus created the model M-ROAMIN (Model of Representation of Multimodal Interactive Learning Objects) for to facilite the materialization of Multimodal LO using 2D codes technology and the principles of Multimedia Learning, as well as requirements for preparation of instructional content, which can be used in distance learning or classroom learning. Metadata were analyzed to represent the LO model and rules were created in order to facilitate the representation of content in different technologies. At the end of the stages of development of applications and materialization of LO, the model was validated with classes Undergraduate and High School. The results obtained in experiments provide indicators of benefits in using the model as an alternative to facilitate access to content with mobility and interactivity.
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13

Vallino, Thierry. "Recherche des performances dans la mise en œuvres des codes linéaires cycliques en ASIC à haut debit." Metz, 1999. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1999/Vallino.Thierry.SMZ9953.pdf.

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L'essor des télécommunications est un des faits marquant de cette fin du siècle. Il s'accompagne d'un accroissement des applications dédiées (télévision numérique, internet). Cependant, les voies de transmissions ne sont pas parfaites et peuvent corrompre les données émises. L'utilisation des codes correcteurs d'erreurs permets alors dans une certaine mesure d'y remédier. Notre travail s'est articulé autour de deux axes. Le premier axe a consisté à trouver et développer l'architecture d'un codeur/décodeur à logique majoritaire fonctionnant à haut débit et pouvant traiter des flots continus de données. L'étude des différentes implantations possibles de diviseur polynomial (cœur du codeur/décodeur) a permis de montrer que l'architecture parallèle était la mieux adaptée à nos contraintes. Celle-ci a été décrite en VHDL synthétisable et simulée sous le logiciel Altera MaxPlus II. A partir de cette description, l'impact du degré de parallélisme sur la surface et le débit du codeur/décodeur a été étudié sur plusieurs codes à logique majoritaire (DSCC, DTI, EG). Il en ressort que l'augmentation du débit est nettement plus importante que celle de la surface (circuit EPF10K10LC84-3). Le deuxième axe de recherche a consisté à une étude de faisabilité dans la mise en œuvre d'un code Reed-Solomon avec effacements. La méthode des effacements permets d'accroitre la capacité de correction des codes Reed-Solomon d'origine au moyen d'une technique de marquage. Habituellement, l'implantation des codes RS avec effacements est réalisée mais sans mettre en œuvre la technique de marquage. Un tel marquage a été développé et simulé en coopération avec TDF-C2R. La simulation ayant permis de valider cette technique, un codeur/décodeur RS (127, 121, 7) a été décrit en VHDL synthétisable et simulé sous le logiciel Altera Maxplus II. Les résultats ont permis de montrer que les performances d'un tel circuit sont comparables à celles des circuits usuels n'implantant pas le marquage
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14

VIVALDINI, TULIO C. "Medidas de velocidade de arrastamento de eletrons no isobutano puro." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9525.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
FAPESP:07/06771-8
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15

SANTOS, DIOGO F. dos. "Caracterização dos campos neutrônicos obtidos por meio de armadilhas de nêutrons a partir da utilização de água pesada (D2O) no interior do núcleo do reator nuclear IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23825.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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16

Fourquet, Rafaël. "Décodage par liste des codes de Reed-Muller et application à la cryptanalyse." Paris 8, 2011. http://octaviana.fr/document/185167993#?c=0&m=0&s=0&cv=0.

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Les codes de Reed-Muller sont des codes historiquement importants pour la correction d'erreurs, et il existe depuis longtemps des algorithmes de décodage efficaces. La thèse traite du "décodage par liste" de ces codes au delà du cadre strict de la communication d'information. Les codes de Reed-Muller ont un lien étroit avec les fonctions booléennes. Celles-ci sont utilisées dans de nombreux systèmes de chiffrement, ce qui rend ces algorithmes de décodage applicables au domaine cryptographique. Le modèle est alors différent: on ne suppose plus que les erreurs sont aléatoires. L'algorithme doit alors être plus robuste, car il doit être capable de corriger des erreurs dont la répartition est arbitraire, comme celles produites par un "adversaire". Les algorithmes présentés dans la thèse correspondent à ce modèle. Ils sont dans la lignée des algorithmes de Kabatiansky-Tavernier pour les ordres un (2004) et deux (2005). Ceux-ci peuvent être déterministes ou probabilistes. Les premiers sont infaillibles (sous certaines conditions), et sont donc particulièrement adaptés à l'étude des fonctions booléennes; ils permettent par exemple d'en calculer la non-linéarité, qui est un paramètre important de résistance cryptographique. Cependant, en raison de leur complexité élevée, ces algorithmes déterministes ne s'appliquent qu'aux codes de petite longueur. Les versions probabilistes prennent alors le relais et corrigent la plupart des erreurs même dans le modèle adversaire. On présente des techniques permettant d'appliquer ces algorithmes probabilistes à la cryptanalyse de certains systèmes de chiffrement par blocs, comme le DES
Reed-Muller codes are historically important error correcting codes, for which good decoding algorithms were known for a long time. List decoding of these codes is the subject of this thesis, Reed-Muller codes are closely related to Boolean functions, which are themselves widely used in encryption systems, so these decoding algorithm are also useful in cryptography. However, in this case, the settings are different: one can no longer assume that the "errors" are random. Then the algorithm has to be more robust, to be able to correct arbitrary error patterns, for example errors produced by an "adversary". The algorithms shown in this thesis correspond to this setting. They can be either "determinist" or "probabilist". Determinist algorithms are very powerful, as in certain conditions they cannot fail. This property makes them particularly well suited for the study of Boolean functions (for example, they can be used to determine the non-linearity of these functions, which is an important parameter in cryptography). However, because of their high complexity, they can be applied only to a limited class of codes (the "small" ones). On the other hand, probabilist algorithms can be used for much larger codes. Decoding failure is possible, but "most" errors must be corrected, even in the cryptographic setting. We show in this thesis some techniques to apply the probabilist algorithms to the cryptanalysis of a certain class of cryptographic systems (for example the DES)
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17

SILVA, ALEXANDRE F. P. da. "Calibração da potência do reator IPEN/MB-01 na configuração cilíndrica de menor excesso de reatividade obtida a partir da medida absoluta do fluxo médio de nêutrons." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11792.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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18

GHOSH, SWAROOP. "SCAN CHAIN FAULT IDENTIFICATION USING WEIGHT-BASED CODES FOR SoC CIRCUITS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085765670.

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19

Poehls, Kerstin. "Europa backstage : Expertenwissen, Habitus und kulturelle Codes im Machtfeld der EU /." Bielefeld : Transcript, 2009. http://deposit.d-nb.de/cgi-bin/dokserv?id=3190337&prov=M&dok_var=1&dok_ext=htm.

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FANARO, LEDA C. C. B. "Determinacao experimental de indices espectrais por varredura gama de vareta combustivel no reator IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9410.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Chi, Zhanjiang. "Performance Analysis of Maximal-Ratio Combining and Space-Time Block Codes with Transmit Antenna Selection over Nakagami-m Fading Channels." School of Electrical and Information Engineering, 2007. http://hdl.handle.net/2123/2012.

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Master of Engineering (Research)
The latest wireless communication techniques such as highspeed wireless internet application demand higher data rates and better quality of service (QoS). However, transmission reliability is still degraded by harsh propagation channels. Multiple-input multiple-output (MIMO) systems can increase the system capacity and improve transmission reliability. By transmitting multiple copies of data, a MIMO system can effectively combat the effects of fading. Due to the high hardware cost of a MIMO system, antenna selection techniques have been applied in MIMO system design to reduce the system complexity and cost. The Nakagami-m distribution has been considered for MIMO channel modeling since a wide range of fading channels, from severe to moderate, can be modeled by using Nakagami-m distribution. The Rayleigh distribution is a special case of the Nakagami-m distribution. In this thesis, we analyze the error performance of two MIMO schemes: maximal-ratio combining with transmit antenna selection (the TAS/MRC scheme) and space-time block codes with transmit antenna selection (the TAS/STBC scheme) over Nakagami-m fading channels. In the TAS/MRC scheme, one of multiple transmit antennas, which maximizes the total received signal-to-noise ratio (SNR), is selected for uncoded data transmission. First we use a moment generating function based (MGF-based) approach to derive the bit error rate (BER) expressions for binary phase shift keying (BPSK), the symbol error rate (SER) expressions for M-ray phase shift keying (MPSK) and M-ray quadrature amplitude modulation (MQAM) of the TAS/MRC scheme over Nakagami-m fading channels with arbitrary and integer fading parameters m. The asymptotic performance is also investigated. It is revealed that the asymptotic diversity order is equal to the product of the Nakagami fading parameter m, the number of transmit antenna Lt and the number of receive antenna Lr as if all transmit antenna were used. Then a Gaussian Q-functions approach is used to investigate the error performance of the TAS/STBC scheme over Nakagami-m fading channels. In the TAS/STBC scheme, two transmit antennas, which maximize the output SNR, are selected for transmission. The exact and asymptotic BER expressions for BPSK are obtained for the TAS/STBC schemes with three and four transmit antennas. It is shown that the TAS/STBC scheme can provide a full diversity order of mLtLr.
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STEFANI, GIOVANNI L. de. "Sobre a técnica de Rod Drop em medidas de reatividade integral em bancos de controle e segurança de reatores nucleares." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10210.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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CARLUCCIO, THIAGO. "Implementação e qualificação de metodologia de cálculos neutrônicos em reatores subcríticos acionados por fonte externa de nêutrons e aplicações." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10033.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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MENCARINI, LEONARDO de H. "Estudo do comportamento de um detector de radiação passivo para fins aeronáuticos utilizando o método Monte Carlo." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10611.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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GIAROLA, RODRIGO S. "Estudo teórico-experimental da resposta radiométrica de câmaras de ionização utilizadas em dosimetria em feixes de raios X para diagnóstico radiológico." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11786.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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26

TADA, ARIANE. "Analise dosimetrica de fontes de radiacao para uso em lesoes dermatologicas." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9551.

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IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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27

Scholz, Johanna Felicity. "Is European journalism possible? a comparison of journalistic roles in the European sphere based on codes of ethics." Wien facultas.wuv, 2009. http://deposit.d-nb.de/cgi-bin/dokserv?id=3341297&prov=M&dok_var=1&dok_ext=htm.

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28

GONCALVES, VINICIUS D. "Caracterização da dose em pacientes devido a produção de imagem de raios-X utilizadas em radioterapia guiada por imagem - IGRT." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10555.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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29

COELHO, TALITA S. "Desenvolvimento de um sistema de dosimetria para aplicadores de betaterapia de 90Sr+90Y." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9568.

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IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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30

Deravi, Farzaneh. "Contribution à l' étude du parler bilingue Persan-Français de locuteurs très compétents." Paris 8, 2007. http://octaviana.fr/document/135520525#?c=0&m=0&s=0&cv=0.

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Ce travail de recherche a pour objectif de contribuer à une meilleure compréhension du parler bilingue et plus particulièrement de celui des bilingues très compétents persan- français. Une approche ancrée dans les disciplines de la linguistique du contact et de la psycholinguistique, ayant toutes deux un intérêt commun à l'étude de la production de la parole bilingue, a été adoptée. Trente bilingues persan-français précoces, équilibrés et très compétents constituent le socle de cette recherche. L'analyse linguistique de leurs énoncés persan-français a mis en évidence une fréquence importante d'alternances codiques ainsi qu'une riche variété de leurs manifestations. Ces bilingues très compétents procèdent à la fois aux intégrations morphologiques complexes et à l'insertion de phrases entières en provenance de leur deuxième langue, en choisissant l'option la mieux adaptée au contexte discursif. Les données recueillies ne révèlent aucune corrélation entre la compétence de ces bilingues dans leur deuxième langue et le pourcentage d'alternances codiques effectuées dans cette langue. Trois expériences psycholinguistiques ont été menées avec ces participants pour déterminer les mécanismes d'activation et de sélection qui sous-tendent leur accès au lexique dans le cadre du paradigme image/mot : une impliquant des distracteurs visuels et deux autres avec des distracteurs auditifs. Les résultats obtenus pour ces bilingues persan-français précoces, équilibrés et très compétents plaident en faveur des prédictions d'un modèle d'activation en cascade et d'un modèle de sélection lexicale non spécifique à la langue
This research aims at contributing to the understanding of bilingual speech, especially the speech of highly proficient Persian-French bilinguals. An approach anchored in two disciplines, those of contact linguistics and psycholinguistics, has been adopted as they both share a common interest for bilingual speech production. Thirty early, balanced and highly proficient Persian-French bilinguals constitute the basis of this research. The linguistic analysis of their Persian-French utterances has revealed frequent code switches as well as a large variety of their forms and loci of occurrence. These highly competent bilinguals proceed both with complex morphological integrations and the insertion of whole sentences from their second language, depending on the option best adapted to the current discourse context. The collected data do not reveal any correlation between these bilinguals’ competence in their second language and the percentage of code switches in this language. Three psycholinguistic experiments were conducted with these participants, within a word/picture interference paradigm, in order to determine their lexical access’ underlying processes (activation and selection): one experiment with visual and two with auditory distractors. The results obtained for early, balanced and highly proficient Persian-French bilinguals seem to support the predictions of a cascade activation model and a language-non-specific model of lexical access
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31

MASSICANO, FELIPE. "Quantificacao de imagens tomograficas para calculo de dose em diagnose e terapia em medicina nuclear." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9601.

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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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32

SOUZA, GREGORIO S. de. "Projeto e implantação de melhorias na blindagem biológica da instalação pra estudos em BNCT." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9967.

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IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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33

CASTRO, VINICIUS A. de. "Otimização do feixe de irradiação na instalação para estudos em BNCT junto ao reator IEA-R1." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23700.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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34

COSTA, PRISCILA. "Desenvolvimento de uma metodologia para caracterização do filtro cuno do reator IEA-R1 utilizando o método de Monte Carlo." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23659.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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35

GIGLIOLI, MILENA. "Avaliação da distribuição da dose absorvida em radioterapia com campos irregulares e alargados." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10096.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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36

Soude, Henoc. "Contributions à l'optimisation des ressources énergétiques dans les réseaux de processeurs à capteurs." Paris 8, 2011. http://octaviana.fr/document/16385064X#?c=0&m=0&s=0&cv=0.

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Face aux problèmes d'automonie énergétique, de durée de fonctionnement, de sûreté d'acquisition des données des réseaux de capteurs, nous proposons deux solutions optimisantes : la première est un outil original de description de programmes TinyOS et d'économie d'énergie consommée. Cet outil nous permet de déterminer l'attribution optimisée de fréquences pour l'exécution des différentes tâches d'une application d'un réseau de capteurs, par simple recompilation du code d'une application existante. La seconde est la transposition aux réseaux de capteurs des outils d'autocorrection utilisés dans les sondes spatiales. L'intégrité de vastes ensembles de données transmis à grande distance, nous la transposons à l'économie d'énergie consommée et de puissance de transmission liées à la certitude de ne pas avoir à retransmettre des données toujours de faible taille entre processeurs capteurs d'un réseau
In order to solve the problem related to lifetime and safety in wireless sensor networks, we propose the following solutions : The first one is an original tool for describing TinyOS programs and for harvesting sensors energy. Our tool allows us to optimize the execution frequency of applications at compile time, in order to reduce sensor energy consumption. The second one is the usage of forward error control techniques used in spacecraft. We exploit the fact that this technique requires neither acknoledgment nor data retransmission when errors occur
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37

GONCALVES, IRACI M. P. "Monitoração e diagnóstico para detecção de falhas de sensores utilizando a metodologia GMDH." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11382.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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38

Eberlein, Lukas J. [Verfasser], Stefan M. [Akademischer Betreuer] Kast, and Roland [Gutachter] Winter. "A combined computational and NMR-spectroscopic approach for tautomer elucidation under extreme conditions towards investigating the robustness of genetic codes / Lukas J. Eberlein ; Gutachter: Roland Winter ; Betreuer: Stefan M. Kast." Dortmund : Universitätsbibliothek Dortmund, 2021. http://d-nb.info/1230628673/34.

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39

ONO, SHIZUCA. "Modelos aproximados para o calculo do transporte de particulas neutras em dutos." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10788.

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IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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40

NUNES, BEATRIZ G. "Determinação exerimental de razões espectrais e do espectro de energia dos nêutrons no combustível do reator nuclear IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10069.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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41

Mathieson, Keith. "Modelling semiconductor pixel detectors." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368733.

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42

Gonçalves, Iraci Martinez Pereira. "Monitoração e diagnóstico para detecção de falhas de sensores utilizando a metodologia GMDH." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85133/tde-04062012-144516/.

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O sistema de detecção de falhas e diagnóstico é um sistema de suporte ao operador dedicado a funções específicas que alertam os operadores para problemas de falhas em sensores e atuadores, e auxiliam no diagnóstico antes que os limites normais de alarmes sejam atingidos. Sistemas de suporte ao operador surgiram para diminuir a complexidade dos painéis causada pelo grande aumento de informação disponível nas salas de controle das centrais nucleares. Neste trabalho foi desenvolvido um Sistema de Monitoração e Diagnóstico utilizando a metodologia GMDH (Group Method of Data Handling) aplicado ao reator de pesquisas do Ipen IEA-R1. O sistema faz a monitoração, comparando os valores calculados pelo modelo GMDH com os valores medidos. A metodologia desenvolvida foi aplicada inicialmente em modelos teóricos: um modelo teórico de trocador de calor e um modelo teórico do reator IEA-R1. Os resultados obtidos com os modelos teóricos propiciaram uma base para a aplicação da metodologia aos dados de operação do reator. Para a monitoração de dados de operação foram desenvolvidos três modelos GMDH: o primeiro utilizou apenas variáveis de processo, o segundo modelo foi desenvolvido considerando-se algumas variáveis nucleares e três variáveis de temperatura, e o terceiro modelo GMDH considerou todas as variáveis possíveis. Os três modelos apresentaram resultados excelentes, mostrando amplamente a viabilidade da utilização da metodologia GMDH na monitoração de dados de operação. A comparação entre os resultados dos três modelos desenvolvidos mostrou ainda a capacidade da metodologia GMDH de escolher as melhores variáveis para otimização do modelo. Para a implementação de um sistema de diagnóstico, foram adicionadas falhas sinteticamente aos valores das variáveis de temperatura. Os valores de falhas correspondem a uma descalibração da temperatura e o resultado da monitoração de dados com falhas foi utilizado para a elaboração de um sistema de diagnóstico simples e objetivo baseado na lógica nebulosa.
The fault detection and diagnosis system is an Operator Support System dedicated to specific functions that alerts operators to sensors and actuators fault problems, and guide them in the diagnosis before the normal alarm limits are reached. Operator Support Systems appears to reduce panels complexity caused by the increase of the available information in nuclear power plants control room. In this work a Monitoring and Diagnosis System was developed based on the GMDH (Group Method of Data Handling) methodology. The methodology was applied to the IPEN research reactor IEA-R1. The system performs the monitoring, comparing GMDH model calculated values with measured values. The methodology developed was firstly applied in theoretical models: a heat exchanger model and an IPEN reactor theoretical model. The results obtained with theoretical models gave a base to methodology application to the actual reactor operation data. Three GMDH models were developed for actual operation data monitoring: the first one using just the thermal process variables, the second one was developed considering also some nuclear variables, and the third GMDH model considered all the reactor variables. The three models presented excellent results, showing the methodology utilization viability in monitoring the operation data. The comparison between the three developed models results also shows the methodology capacity to choose by itself the best set of input variables for the model optimization. For the system diagnosis implementation, faults were simulated in the actual temperature variable values by adding a step change. The fault values correspond to a typical temperature descalibration and the result of monitoring faulty data was then used to build a simple diagnosis system based on fuzzy logic.
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43

VIANA, RODRIGO S. S. "Espectrometria e reconstrução de imagens tomográficas de emissão estimulada por nêutrons via algoritmo EM e Método de Monte Carlo." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23305.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Tese (Doutorado em Tecnologia Nuclear)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
FAPESP:10/04206-4
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44

Karagozlu, Eren. "A Study On Symbol Synchronization And Channel Estimation Form-ary Orthogonal Transmission." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613622/index.pdf.

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In this thesis, two key issues regarding M-ary orthogonal signaling systems, namely channel estimation and symbol timing recovery are investigated. Kasami codes, which are also called quasi orthogonal codes, are used for transmission of the information in place of orthogonal waveforms. In order to achieve symbol synchronization, a timing recovery scheme based on the Maximum Likelihood (ML) estimation of timing offset is proposed and the effects of proposed structure over the receiver performance are examined by using computer simulations. Moreover, the receiver performance of M-ary orthogonal signals transmitted over multipath fading channel is investigated. Least Square (LS) approach, based on the transmission of known training sequence, is used to estimate the channel impulse response. In addition to this, frame synchronization is employed at the receiver to extract the timing information by determining the start time of the received symbols. Computer simulations related to the proposed receiver structure are carried out in order to observe how the system performance is affected under multipath fading channel. Parameter selection guides regarding a good performance are also provided.
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45

Campos, Lucélia de Almeida. "Isolamento e caracterização da delta toxina do veneno de Crotalus durissus terrificus." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-14052012-135435/.

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O veneno de C. d. terrificus tem sido descrito como sendo de pouca complexidade, tendo 4 frações caracterizadas, convulxina, giroxina. crotoxina e crotamina. O presente trabalho visou o isolamento e caracterização da Delta toxina cuja existência havia sido aventada em trabalhos anteriores. Após a realização de uma varredura de tampões em uma coluna de exclusão molecular Superdex-75 acoplada a um sistema FPLC, na presença de três diferentes tampões, chegou-se a uma condição ideal de fracionamento do veneno crotálico. Em seqüência realizou-se a segunda etapa de purificação em sistema HPLC em uma coluna C4, onde foi possível identificar o pico de interesse. O pico puro passou por análises em MALDI-ToF sendo sua massa estimada em 14.074,92 Da, Quando analisado por eletroforese em gel de poiiacrilamida, a delta toxina apresentou massa molecular de cerca de 14 kDa e uma migração anômala, Por eletroforese 2D, a proteína apresentou caráter ácido, com pl entre 4 e 5 e massa molecular de aproximadamente 42 kDa, revelando \"spots\" muito semelhantes podendo ser isoformas com características de uma proteína glicosiiada. Após digestão dos spots com tripsina, os fragmentos foram confrontados com o banco de dados do \"swissprot\", mostrando alto grau de homologia \"até 43% de cobertura\" com a troca ri na, um ativador de protrombina do veneno de Tropidechis carinatus, esses dados foram confirmados com a análise de aminoácidos. De posse desses resultados, optou-se por testar a capacidade da fração purificada de ativar fator X e II, usando substratos sintéticos. Os resultados apontaram para uma ativação direta do fator X, uma vez que não houve ativação do fator II, atividade que também não foi detectada no veneno total. A mesma se mostrou um potente ativador da agregação de forma direta, uma vez que os ensaios de agregação plaquetária foram realizados com plaquetas lavadas, logo na ausência de fatores séricos. Quando os ensaios de agregação foram realizados na presença de alguns inibidores observou-se que nem a atividade metalo proteinase, nem a serino proteinase, tampouco um domínio lectina estavam envolvidos no processo, uma vez que EDTA, benzamidina e D-galactose não inibiram a atividade da proteína. No presente trabalho isolamos a Delta toxina do veneno de C. d. terrificus. A mesma se comportou como previsto por Vital Brazil em 1980, eluindo na posição por ele aventada, sendo uma proteína ativadora de Fator X que ativa agregação plaquetária mesmo em concentrações muito baixas e de massa molecular de 40 kDa levando nos a crer se tratar de um homotrímero cujos componentes são unidos por ligações fracas.
The Crotalus durissus terrificus venom has been so far described as being of low complexity, with four major components described: convulxin, gyroxin, crotoxin and crotamine. In recent studies, other components of this venom were characterized as, for example, an analgesic factor. In 1980, Vital Brazil predicted the existence of a toxin which could be involved in platelet aggregation, and named it delta toxin. However, this toxin has never been isolated or characterized. The aim of the present work was to purify and characterize this toxin. After FPLC size exclusion chromatography followed by reverse phase HPLC, an homogeneous fraction was obtained, with a molecular weight of 14,074.92 Da. When analyzed by SOS-PAGE, this toxin presented an anomalous behavior, with a molecular weight of 14 kDa, while in 2D gels, spots around 40 kDa and with an isoelectrical point between 4 and 5 were observed suggesting isoforms with glicosilation microheterogeneity. After trypsin digestion, the fragments were submitted to the swissprot databank showing high homology (43% coverage, 15 matching peptides) with trocarin, a prothrombin activator from Tropidechis carinatus. These data were further confirmed by aminoacid analysis. The toxin was tested for its ability to activate factor II and X using synthetic substrates. Our data indicate a direct activation of factor X. The same toxin also behaved as a potent direct platelet aggregation activator on washed platelets. Assays with specific inhibitors indicate that neither metalloproteinase, nor serinoproteinase or t lectin domains are involved in the aggregating activity, since EDTA, benzamidin and D-galactose did not inhibit the toxin. In the present work, we were able to identify, purify and characterize a new toxin from the brazilian rattlesnake. It behaved as predicted by Vital-Brazil and displayed direct factor X activating properties, also inducing platelet aggregation, even at low concentrations. Our data also indicate that it is probably a homotrimer with the subunities linked by hydrophobic and/or electrostatic interactions.
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46

TAKEDA, MAURO N. "Aplicação do método de Monte Carlo no estudo da padronização de radionuclídeos com esquema de desintegração complexos em sistema de coincidencias 4-pi-beta-gama." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11474.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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47

Souza, Patrícia Kelly de. "As competências estaduais na construção da república: fundamentos e contexto do código do processo civil e comercial do Rio Grande do Sul (1908)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/135475.

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La présente recherche a eu pour objet étudier les préssupositions, le contexte et le processus de création du Code du Procès Civil et Commercial du Rio Grande do Sul (1908) montré par Alcides de Mendonça Lima comme le prémier Code départemental Brésilien. De cette façon, la présente dissertation est divisée en trois chapitres avec la finalité de servir aux objectifs déjà exposés en avant ; le premier chapitre sert au contexte dans lequel tient lieu le phénomène ici examiné, en cherchant d’élucider les questions rapportés au temps, au espace at aux acteurs engajés. Le deuxième chapitre se rapport, de façon plus spécifique, à l’analyse des ideés des deux grands leaders du PRR (Parti Républicain du Rio Grande do Sul); M. Julio de Castilhos et M. Borges de Medeiros, leurs concepts sur le Fédéralisme, leurs notions de comment devrait être le rapport des États avec le Pouvoir Central et quel devrait être l’espace de l’autonomie étatale, inclui en termes de législation. Ce texte envisage aussi le rapport de l’union avec les États et des espaces d’autonomie législative, inclu les débats rélévants. Le troisième chapitre s’occupe des réformes juridiques de M. Julio de Castilhos, spècialement du procès de codification dans le Rio Grande do Sul et les thèmes connectés avec lui. Ce Code du Procès Civil et Commercial du Rio Grande do Sul est apparu de la nécessité de chercher une régulamentation juridique adequate au contexte de son époque. L’époque dans laquelle avait eu des importantes modifications, même que rècemment, comme l’abolition de l’esclavage, la fin de l’Empire au Brésil, le commerce et l’économie que se modificaient et les transformations de la vie politique dans l’État du Rio Grande do Sul. Dans un contexte de la concéption de M. Julio de Castilhos, d’accord la pensée juridique et politique, le Code de 1908 n’a pas apporté de modifications profondes en rapport de la Régulamentation 737 de 1850. En vérité, il y a des changements ponctuels. Cepedendant, la majeure transformation a été le fait de suivre la logique d’une régulamentation impériale et qui a conduit beaucoup des processualistes à ne pas reconnaître le Code, dans l’époque républicaine.
A presente pesquisa teve por objeto estudar os pressupostos, o contexto e o processo de criação do Código do Processo Civil e Comercial do Rio Grande do Sul (1908), apontado por Alcides de Mendonça Lima como o primeiro Código Estadual brasileiro. Para tanto, a presente dissertação está dividida em três capítulos com a finalidade de atender aos objetivos já expostos anteriormente. O primeiro capítulo trata do contexto em que ocorre o fenômeno aqui investigado, buscando esclarecer questões relativas ao tempo, ao espaço e aos atores envolvidos. O segundo capítulo trata, de uma forma mais específica, da análise das ideias dos dois grandes líderes do PRR, Júlio de Castilhos e Borges de Medeiros, seus conceitos de federalismo, suas noções de como deveria ser a relação dos Estados com o poder central e qual deveria ser o espaço de autonomia estadual, inclusive em termos de legislação. Trata também da relação da União com os estados e dos espaços de autonomia legislativa, incluindo debates relevantes. O terceiro capítulo trata das reformas jurídicas castilhistas, em especial do processo de codificação no Rio Grande do Sul e temas com ele conexos. O Código do Processo Civil e Comercial do Rio Grande do Sul surgiu da necessidade de buscar uma regulação jurídica adequada para o contexto de sua época. Era uma época em que importantes mudanças ainda eram historicamente recentes, como a abolição da escravatura, o fim do Império, o comércio e economia que se modificavam, as modificações na vida política no estado do Rio Grande do Sul. Em um contexto castilhista de pensamento jurídico e político, o Código de 1908 não promoveu modificações profundas em relação ao Regulamento 737 de 1850. Ele fez mudanças pontuais. Entretanto, a maior mudança foi o fato de ele ser estadual e retirar a legislação federal, centralizada. Talvez o fato de seguir a lógica de um regulamento imperial é que levou a muitos processualistas a não reconhecerem o código em sua época republicana.
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48

SANCHEZ, ANDREA. "Projeto e confecção de simuladores oftálmicos para aplicações clínicas." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11431.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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49

PINTO, LETICIA N. "Experimentos de efeitos de reatividade no reator nuclear IPEN/MB-01." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10099.

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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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50

Davies, Rachel Lindley. "Marian aspects of Montpellier Codex motets." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4453/.

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This thesis explores the means by which, and the forms in which, the Virgin Mary and her medieval Cult are represented in the motets of the thirteenth-century northern French Montpellier Codex (Mo). It reveals how various musical and poetic techniques are used to worship and address the Virgin and to make her the central focus, even in works addressing apparently non-Marian aspects of Christianity. I demonstrate that the repertoire uses linguistic, musical, and numerical symbolism for Marian purpose, and consider how these symbols would have been understood by a medieval audience. This analytic approach reveals that the Feast of the Annunciation features more frequently in the Codex than has previously been recognised, and that the Virgin, and her Feasts of the Annunciation and Assumption, are of great, and previously unexplored, significance to Fascicle IV of the Codex. This thesis provides new insight into how the theme of mystical marriage is emphasised in Mo, and the final two chapters explore how the Virgin, and the Marian model of mystical marriage, were used as a means for molding and critiquing a variety of women, including the stock characters of the dame courtoise and the shepherdess Marion.
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