Academic literature on the topic 'Signaux CARMA'
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Journal articles on the topic "Signaux CARMA"
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Wang, Donghai, Reiko Matsumoto, Yun You, Tuanjie Che, Xue-Yan Lin, Sarah L. Gaffen, and Xin Lin. "CD3/CD28 Costimulation-Induced NF-κB Activation Is Mediated by Recruitment of Protein Kinase C-θ, Bcl10, and IκB Kinase β to the Immunological Synapse through CARMA1." Molecular and Cellular Biology 24, no. 1 (January 1, 2004): 164–71. http://dx.doi.org/10.1128/mcb.24.1.164-171.2003.
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ABSTRACT CARMA1 (also known as CARD11) is a scaffold molecule and contains a caspase-recruitment domain (CARD) and a membrane-associated guanylate kinase-like (MAGUK) domain. It plays an essential role in mediating CD3/CD28 costimulation-induced NF-κB activation. However, the molecular mechanism by which CARMA1 mediates costimulatory signals remains to be determined. Here, we show that CARMA1 is constitutively associated with the cytoplasmic membrane. This membrane association is essential for the function of CARMA1, since a mutant of CARMA1, CARMA1(L808P), that is defective in the membrane association cannot rescue CD3/CD28 costimulation-induced NF-κB activation in JPM50.6 CARMA1-deficient T cells. Although CD3/CD28 costimulation effectively induces the formation of the immunological synapse in CARMA1-deficient T cells, the recruitment of protein kinase C-θ (PKC-θ), Bcl10, and IκB kinase β (IKKβ) into lipid rafts of the immunological synapse is defective. Moreover, expression of wild-type CARMA1, but not CARMA1(L808P), restores the recruitment of PKC-θ, Bcl10, and IKKβ into lipid rafts in CARMA1-deficient T cells. Consistently, expression of a mutant CARMA1, CARMA1(ΔCD), that cannot associate with Bcl10 failed to restore CD3/CD28 costimulation-induced NF-κB activation in JPM50.6 cells, whereas expression of Bcl10-CARMA(ΔCD) fusion protein effectively restored this NF-κB activation. Together, these results indicate that CARMA1 mediates CD3/CD28 costimulation-induced NF-κB activation by recruiting downstream signaling components into the immunological synapse.
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Moreno-García, Miguel E., Karen Sommer, Hector Rincon-Arano, Michelle Brault, Jun Ninomiya-Tsuji, Lydia E. Matesic, and David J. Rawlings. "Kinase-Independent Feedback of the TAK1/TAB1 Complex on BCL10 Turnover and NF-κB Activation." Molecular and Cellular Biology 33, no. 6 (January 7, 2013): 1149–63. http://dx.doi.org/10.1128/mcb.06407-11.
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Antigen receptors activate pathways that control cell survival, proliferation, and differentiation. Two important targets of antigen receptors, NF-κB and Jun N-terminal kinase (JNK), are activated downstream of CARMA1, a scaffolding protein that nucleates a complex including BCL10, MALT1, and other IκB kinase (IKK)-signalosome components. Somatic mutations that constitutively activate CARMA1 occur frequently in diffuse large B cell lymphoma (DLBCL) and mediate essential survival signals. Mechanisms that downregulate this pathway might thus yield important therapeutic targets. Stimulation of antigen receptors induces not only BCL10 activation but also its degradation downstream of CARMA1, thereby ultimately limiting signals to its downstream targets. Here, using lymphocyte cell models, we identify a kinase-independent requirement for TAK1 and its adaptor, TAB1, in antigen receptor-induced BCL10 degradation. We show that TAK1 acts as an adaptor for E3 ubiquitin ligases that target BCL10 for degradation. Functionally, TAK1 overexpression restrains CARMA1-dependent activation of NF-κB by reducing BCL10 levels. TAK1 also promotes counterselection of NF-κB-addicted DLBCL lines by a dual mechanism involving kinase-independent degradation of BCL10 and kinase-dependent activation of JNK. Thus, by directly promoting BCL10 degradation, TAK1 counterbalances NF-κB and JNK signals essential for the activation and survival of lymphocytes and CARMA1-addicted lymphoma types.
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Lv, Hongwu, Jane Hillston, Paul Piho, and Huiqiang Wang. "An Attribute-Based Availability Model for Large Scale IaaS Clouds with CARMA." IEEE Transactions on Parallel and Distributed Systems 31, no. 3 (March 1, 2020): 733–48. http://dx.doi.org/10.1109/tpds.2019.2943339.
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Raja, Muhammad Asif Zahoor, and Naveed Ishtiaq Chaudhary. "Two-stage fractional least mean square identification algorithm for parameter estimation of CARMA systems." Signal Processing 107 (February 2015): 327–39. http://dx.doi.org/10.1016/j.sigpro.2014.06.015.
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Lee, Yeejin, and Keigo Hirakawa. "Shift-And-Decorrelate Lifting: CAMRA for Lossless Intra Frame CFA Video Compression." IEEE Signal Processing Letters 27 (2020): 461–65. http://dx.doi.org/10.1109/lsp.2020.2969531.
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Barreto Zorza, Yenny Marcela, Carolina Lucero Enriquez Guerrero, and Vilma Florisa Velasquez Gutierrez. "Efectividad de un programa en la carga de cuidado para cuidadores familiares en tres grupos culturalmente diversos." MedUNAB 20, no. 1 (April 1, 2017): 28–38. http://dx.doi.org/10.29375/01237047.2688.
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Introducción: El envejecimiento poblacional dado por la transición demográfica y epidemiológica, repercute en la dependencia de las actividades de la vida diaria de los adultos mayores, requiriendo de manera constante los cuidados de personas denominadas “cuidadores”, en quienes se genera una carga que afecta su salud física y mental. Objetivo: Evaluar la efectividad de un programa en la carga de cuidado para cuidadores familiares en tres grupos culturalmente diversos. Metodología: Investigación cuantitativa, de tipo analítico, a partir de los resultados de tres estudios cuasiexperimentales de grupos de cuidadores familiares de personas ancianas dependientes funcionalmente. Participaron 88 cuidadores de tres municipios: Bogotá, Cáqueza y Guapi, en un Programa educativo con acciones de cuidado adaptadas culturalmente. La información se recolectó con la Escala de carga de Zarit, antes y después de la implementación del programa, se realizó un análisis con prueba de rango signado de Wilcoxon en cada uno de los tres grupos. Se consideró aspectos éticos. Resultados: El programa educativo para cuidadoras familiares tuvo un efecto estadísticamente significativo en la carga de cuidado de los cuidadores de Cáqueza (valor p 0.014), posiblemente porque el programa responde a una de las necesidades prioritarias de estos cuidadores que es el cuidado de sí mismos, contrario al encontrado en Bogotá y Guapi. Lo que sugiere continuar estudios con programas a cuidadores con perspectiva cultural. Conclusión: El logro de resultados estadísticamente significativos en las cuidadoras de Cáqueza sugiere que ellas cuentan con una mejor red de apoyo familiar y vecinal, por eso asumen la asistencia al programa con mayor dedicación, integralidad y disposición de tiempo.
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Bombardelli, Wagner Wilson Ávila, Antonio Pires de Camargo, Rogério Lavanholi, Ana Cláudia Sátiro Araújo, Marcus Vinicius Talamini Junior, and José Antônio Frizzone. "PROJETO E VALIDAÇÃO DE UMA BANCADA PARA ENSAIOS DE PERDA DE CARGA LOCALIZADA." IRRIGA 1, no. 1 (October 2, 2017): 1–10. http://dx.doi.org/10.15809/irriga.2017v1n1p1-10.
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PROJETO E VALIDAÇÃO DE UMA BANCADA PARA ENSAIOS DE PERDA DE CARGA LOCALIZADA WAGNER WILSON ÁVILA BOMBARDELLI¹; ANTONIO PIRES DE CAMARGO²; ROGÉRIO LAVANHOLI³; ANA CLAUDIA SÁTIRO ARAUJO¹; MARCUS VINICIUS TALAMINI JUNIOR¹ E JOSÉ ANTÔNIO FRIZZONE4 1 Mestrando, Departamento de Engenharia de Biossistemas, Escola Superior de Agricultura “Luiz de Queiroz” - ESALQ/USP, Avenida Pádua Dias, 11, 13418-900, Piracicaba - SP. E-mail: wavila@usp.br, satiroagro@gmail.com, talamini.1988@gmail.com²Especialista em Laboratório, Departamento de Engenharia de Biossistemas - ESALQ/USP, e-mail: apc.pires@gmail.com ³ Doutorando, Departamento de Engenharia de Biossistemas – ESALQ/USP, e-mail rogeriolavanholi@usp.br4 Prof. Dr. Titular, Departamento de Engenharia de Biossistemas – ESALQ/USP, e-mail: frizzone@usp.br 1 RESUMO As perdas de carga localizadas são relevantes principalmente no dimensionamento de subunidades de sistemas de microirrigação. O uso de sistemas automatizados adequadamente projetados e validados para a execução de ensaios é conveniente, pois assegura maior estabilidade das condições de ensaio, otimização do tempo de operação, redução das falhas ou imperfeições humanas, consequentemente conduzindo a melhor qualidade dos resultados de ensaio. Deste modo, o presente trabalho propôs projetar, instalar e validar uma bancada automatizada para condução de ensaios de perda localizada de carga. Desenvolveu-se o circuito eletrônico microcontrolado que dispõe de funcionalidades para aquisição e condicionamento de sinais de sensores; controle de inversor de frequência e válvula proporcional; controle Proporcional-Integral-Derivativo (PID); e, comunicação Modbus RTU com outros dispositivos através de rede RS-485. O firmware implementado no microcontrolador foi desenvolvido na linguagem C, enquanto que a interface gráfica do usuário (GUI) foi desenvolvida em C#. A validação da bancada foi efetuada a partir de ensaios de estabilidade, que permitem afirmar o adequado funcionamento da bancada de ensaios. Palavras-chave: circuito eletrônico microcontrolado, hidráulica, microirrigação W. W. Á. BOMBARDELLI; A. P. CAMARGO; R. LAVANHOLI; A. C. S. ARAUJO; M. V. TALAMINI JUNIOR; J. A. FRIZZONEDESIGN AND EVALUATION OF A TEST BENCH FOR DETERMINING MINOR PRESSURE LOSSES 2 ABSTRACT The minor pressure losses are fundamental in the development of subunits for micro-irrigation systems. The use of well-designed and validated automated systems in order to perform tests is convenient because it ensures a greater stability of test conditions, and also improves the use of operating time, reducing the risk of faults or human error, consequently, thus having better quality in the test results. Thereby, this paper aims to develop, install and validate an automated bench to conduct minor pressure loss tests. The previously developed micro-controlled electronic circuit has features to input and store signals from sensors; Frequency inverter controller and proportional valve; Proportional-Integral-Derivative Controller (PID); and a Modbus RTU communication protocol to interact with other devices via RS-485 network. The firmware implemented in the microcontroller was developed using the C programming language, whereas the graphical user interface (GUI) was programmed in C #. The validation of the bench was carried out using stability tests, which approved the test bench performance. Keywords: micro-controlled electronic circuit, hydraulic, micro-irrigation
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Gross, Olaf, Christina Grupp, Christian Steinberg, Stephanie Zimmermann, Dominikus Strasser, Nicole Hannesschläger, Wolfgang Reindl, et al. "Multiple ITAM-coupled NK-cell receptors engage the Bcl10/Malt1 complex via Carma1 for NF-κB and MAPK activation to selectively control cytokine production." Blood 112, no. 6 (September 15, 2008): 2421–28. http://dx.doi.org/10.1182/blood-2007-11-123513.
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AbstractNatural killer (NK) cells are innate immune cells that mediate resistance against viruses and tumors. They express multiple activating receptors that couple to immunoreceptor tyrosine-based activation motif (ITAM)–containing signaling chains for downstream cell activation. Ligation of activating NK-cell receptors induces NK-cell cytotoxicity and cytokine release. How these distinct events are selectively controlled is not well defined. Here we report the identification of a specific signaling pathway that operates downstream of the ITAM-coupled NK-cell receptors NK1.1, Ly49D, Ly49H, and NKG2D. Using primary NK cells from Bcl10−/−, Malt1−/−, Carma1−/−, and Card9−/− mice, we demonstrate a key role for Bcl10 signalosomes in the activation of canonical NF-κB signaling as well as JNK and p38 MAPK upon NK-cell triggering. Bcl10 directly cooperates with Malt1 and depends on Carma1 (Card11) but not on Card9 for NK-cell activation. These Bcl10-dependent cascades selectively control cytokine and chemokine production but do not affect NK-cell differentiation or killing. Thus, we identify a molecular basis for the segregation of NK-cell receptor–induced signals for cytokine release and target cell killing and extend the previously recognized roles for CARD-protein/Bcl10/Malt1 complexes in ITAM receptor signaling in innate and adaptive immune cells.
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Viana, Cláudia M., and Jorge Rocha. "Evaluating Dominant Land Use/Land Cover Changes and Predicting Future Scenario in a Rural Region Using a Memoryless Stochastic Method." Sustainability 12, no. 10 (May 25, 2020): 4332. http://dx.doi.org/10.3390/su12104332.
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The present study used the official Portuguese land use/land cover (LULC) maps (Carta de Uso e Ocupação do Solo, COS) from 1995, 2007, 2010, 2015, and 2018 to quantify, visualize, and predict the spatiotemporal LULC transitions in the Beja district, a rural region in the southeast of Portugal, which is experiencing marked landscape changes. Here, we computed the conventional transition matrices for in-depth statistical analysis of the LULC changes that have occurred from 1995 to 2018, providing supplementary statistics regarding the vulnerability of inter-class transitions by focusing on the dominant signals of change. We also investigated how the LULC is going to move in the future (2040) based on matrices of current states using the Discrete-Time Markov Chain (DTMC) model. The results revealed that, between 1995 and 2018, about 28% of the Beja district landscape changed. Particularly, croplands remain the predominant LULC class in more than half of the Beja district (in 2018 about 64%). However, the behavior of the inter-class transitions was significantly different between periods, and explicitly revealed that arable land, pastures, and forest were the most dynamic LULC classes. Few dominant (systematic) signals of change during the 1995–2018 period were observed, highlighting the transition of arable land to permanent crops (5%) and to pastures (2.9%), and the transition of pastures to forest (3.5%) and to arable land (2.7%). Simulation results showed that about 25% of the territory is predicted to experience major LULC changes from arable land (−3.81%), permanent crops (+2.93%), and forests (+2.60%) by 2040.
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Mantz, A. B., Z. Abdulla, S. W. Allen, J. E. Carlstrom, C. H. A. Logan, D. P. Marrone, B. J. Maughan, J. Willis, F. Pacaud, and M. Pierre. "The XXL Survey." Astronomy & Astrophysics 620 (November 20, 2018): A2. http://dx.doi.org/10.1051/0004-6361/201630096.
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We present results from a 100 ks XMM-Newton observation of galaxy cluster XLSSC 122, the first massive cluster discovered through its X-ray emission at z ≈ 2. The data provide the first precise constraints on the bulk thermodynamic properties of such a distant cluster, as well as an X-ray spectroscopic confirmation of its redshift. We measure an average temperature of kT = 5.0 ± 0.7 keV; a metallicity with respect to solar of Z/Z⊙ = 0.33−0.17+0.19, consistent with lower-redshift clusters; and a redshift of z = 1.99+0.07-0.06 , consistent with the earlier photo-z estimate. The measured gas density profile leads to a mass estimate at r500 of M500 = (6.3 ± 1.5) × 1013 M⊙. From CARMA 30 GHz data, we measure the spherically integrated Compton parameter within r500 to be Y 500 = (3.6 ± 0.4) × 10−12. We compare the measured properties of XLSSC 122 to lower-redshift cluster samples, and find good agreement when assuming the simplest (self-similar) form for the evolution of cluster scaling relations. While a single cluster provides limited information, this result suggests that the evolution of the intracluster medium in the most massive, well-developed clusters is remarkably simple, even out to the highest redshifts where they have been found. At the same time, our data reaffirm the previously reported spatial offset between the centres of the X-ray and SZ signals for XLSSC 122, suggesting a disturbed configuration. Higher spatial resolution data could thus provide greater insights into the internal dynamics of this system.
Dissertations / Theses on the topic "Signaux CARMA"
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Rivoira, Arnaud. "Analyse spectrale des signaux stochastiques à échantillonage aléatoire." Paris 11, 2003. http://www.theses.fr/2003PA112157.
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Les travaux figurant dans ce mémoire portent sur l'analyse spectrale des signaux stochastiques à échantillonnage aléatoire. Nous commençons d'abord par rappeler les enjeux scientifiques et techniques de ce thème puis nous présentons un état de l'art des techniques existantes et précisions le cadre mathématique dans lequel nous avons travaillé. Les méthodes d'analyse spectrale peuvent schématiquement se ranger en deux catégories : celles qui n'utilisent pas les valeurs des instants d'acquisition, celles qui les utilisent. Nous nous intéressons dans un premier temps aux méthodes de la première catégorie. Après avoir brossé un panorama de ces méthodes, nous exposons une nouvelle approche, paramétrique, fondée sur l'identification au modèle CARMA. Ceci étant fait, nous abordons les méthodes exploitant, elles, la donnée de ces instants d'acquisition. En particulier, nous proposons deux grandes classes d'estimateurs : les estimateurs que nous avons baptisés IRINCORREL, qui se rattachent naturellement à ceux introduits par Masry, les estimateurs par projection, qui généralisent la très populaire Slotting technique et ses diverses variantes. Nous terminons enfin par un point de synthèse ouvrant sur les différentes perspectives de cette étude et sur les éventuels prolongements que l'on pourrait envisager de lui donnerThe work presented here deals with the spectral analysis of randomly sampled stochastic signals. After some recalls on the technical and scientific issues at stake, a state of the art of the previous methods is given and the mathematical framework is introduced. Spectral analysis methods can be classified into two categories according to whether or not they use the sampling times are used. The methods of the latter category are considered first. Following an overview of these methods, a new parametric approach, based on the identification to the CARMA model, is detailed. Then, the methods using the values of the sampling times are studied. In particular, two classes of estimators are proposed: the estimators, called IRINCORREL, which are related to those introduced by Masry, the estimators by projection, which generalize the very famous Slotting technique and its different versions. Finally, we conclude by giving a synthetic summary exhibiting the different prospects of this study and the possible extensions that could be investigated
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Silveira, Augusto Wohlgemuth Fleury Veloso da. "Controle de tensão na carga para motor/gerador a relutância variável de três fases." Universidade Federal de Uberlândia, 2012. https://repositorio.ufu.br/handle/123456789/14299.
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Fundação de Amparo a Pesquisa do Estado de Minas GeraisThe subject of this work is to present a switched reluctance machine (SRM) driver capable to control the machine as a motor/generator, allowing the transition between the modes of operation while the machine is running. Six load voltage control strategies developed to be applied to a switched reluctance generator was performed, being that the strategies AV2, TBV, Hi and AMV was developed in this work. A SRM simulation able to represent the machine as a motor/generator was implemented and the results were presented. The load voltage strategies showed in this work was tested through simulations and the results indicate that the strategy called AV2 was the best one, providing a better utilization of the mechanical energy from the primary source. A prototype was assembled and the experimental results showed that the machine operating as a motor/generator operate properly and all the load voltage strategies developed to switched reluctance generator kept the voltage on the load near to the reference value confirming the functionality of the strategies.
Este trabalho tem como objetivo apresentar um acionamento capaz de controlar a máquina de relutância variável (MRV) como motor e como gerador, permitindo a transição de modos de operação com a máquina girando. Seis técnicas de controle de tensão na carga da máquina operando como gerador foram implementadas, sendo que as estratégias AV2, TBV, Hi e AMV foram desenvolvidas neste trabalho. Uma simulação da MRV capaz de representar a operação da máquina como motor/gerador foi desenvolvida e os resultados foram apresentados. As estratégias de controle de tensão na carga foram testadas através de simulação. Comparações entre as mesmas demonstraram que a estratégia AV2 é a que proporciona maior geração de energia elétrica, demonstrando a importância de se adicionar uma etapa de roda livre ao controle do GRV com malha fechada de tensão na carga. Um protótipo foi construído no laboratório utilizando DSP e resultados experimentais da máquina operando como motor/gerador, assim como resultados do GRV controlado pelas estratégias de controle de tensão na carga foram apresentados e discutidos.
Doutor em Ciências
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Rocha, Werickson Fortunato de Carvalho. "Utilização do sinal analitico liquido para avaliação de modelos de calibração multivariada atraves do calculo de figuras de merito e de cartas de controle." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249302.
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Orientador: Ronei Jesus PoppiDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
Made available in DSpace on 2018-08-08T23:09:23Z (GMT). No. of bitstreams: 1 Rocha_WericksonFortunatodeCarvalho_M.pdf: 1597999 bytes, checksum: b9442a7ba3c5fb6665bc87f6c0abf34f (MD5) Previous issue date: 2007
Resumo: Este trabalho teve como objetivo realizar a validação de modelos de calibração multivariada através do cálculo de figuras de mérito e de cartas de controle multivariadas do medicamento Nimesulida por meio do infravermelho próximo. Foram preparadas 69 amostras sintéticas contendo o princípio ativo (Nimesulida) na faixa 10,38-39,47% (m/m) em excipiente (lactose, povidona-KV29- 32, celulose 200, lauril sulfato de sódio, croscarmelose sódica e estereato de magnésio). Destas, 49 amostras foram utilizadas para a calibração e 20 para a validação as quais foram separadas através do algoritmo de Kennard-Stone.O tratamento utilizado nos espectros foi a correção do espalhamento multiplicativo. Na sequência, foram obtidos os seguintes valores para as figuras de mérito: limite de detecção (0,61), limite de quantificação (2,03), exatidão (RMESC 0,66 %(m/m), RMESCV 0,92 %(m/m), RMESP 1,05 %(m/m) de Nimesulida), seletividade média (0,0056), sensibilidade (0,0036), inverso da sensibilidade analítica (0,20 %(m/m)-1 de Nimesulida) e razão sinal ruído (181,11). Na segunda parte do trabalho foram utilizadas 113 amostras sintéticas para construção das cartas de controle multivariadas. Foram desenvolvidas três cartas de controle e calculado os limites de controle para cada carta. Os valores encontrados foram: - carta NAS (Superior = 6,54x10; Inferior = 5,25x10), carta interferente (7,45) e carta resíduo (2,38x10). Através dessas cartas de controle multivariadas foi possível identificar as amostras que estavam dentro e fora de controle. Obteve-se 64 amostras fora de controle e 20 amostras dentro de controle de acordo com o planejamento experimental realizado. Sendo assim, foi possível identificar, de forma qualitativa, as amostras de Nimesulida que estavam dentro e fora de controle. Portanto, a dissertação desenvolvida sugere um novo método analítico que pode ser usado para controle de qualidade em fármacos e para validação de modelos de calibração multivariada, pois os resultados obtidos, indicam que o modelo desenvolvido pode ser utilizado na indústria farmacêutica como uma alternativa ao método-padrão
Abstract: This study was mainly intended to elaborate the validation of multivariate calibration models based on the determination of figures of merit and multivariate control charts constructed with data from Nimesulide tablets upon near-infrared spectroscopy use. A total of 69 synthetic samples were prepared containing the active principle (Nimesulide) in the range of 10,38-39, 47% (m/m) in excipients (Cellulose,Sodium Lauryl Sulphate, Magnesium Stearate, Carmellose Sodium,Povidone and Lactose). It was used 49 samples for the calibration and 20 for the validation that were separated by the Kennard-Stone algorithm. It was used the multiplicative scatter correction on the spectra set. Then, the following values for figures of merit were calculated: limit of detection (0,61) , limit quantification (2,03) , accuracy (RMESC 0,66 %(m/m), RMESCV 0,92%(m/m), RMESP 1,05%(m/m) of Nimesulide), mean selectivity (0,0056), sensitivity (0,0036), inverse analytical sensitivity (0,20 %(m/m)- 1 of the Nimesulide) and signal-to-noise ration (181, 11). In the second application, 113 synthetic samples were used for the construction of multivariate control charts. Three control charts were designed and the control limits for each chart were calculated. The values found were: - chart NAS (upper = 6,54x10; below = 5,25x10), chart interferent (7,45) and chart residual (2,38x10). From these charts it was possible to identify the samples that were in and out of control. It was obtained 64 samples out of control and 20 samples in control, according to the experimental design. Therefore, it was possible to identify, in a qualitative way, the Nimisulide samples that were in control and the ones that were out of control. Hence it follows that, this research project suggests a new analytical method that can be used for quality control in drugs and also for the validation of multivariate calibration models. Thus, the results obtained indicate that this model can be used in pharmaceutical industries as an alternative to the standard procedure
Mestrado
Quimica Analitica
Mestre em Química
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Almeida, Graça Maria Caio Minhós Concha de. "A escola enquanto observatório de diagnóstico de necessidades educativas dos alunos e formativas dos professores - a carta de sinais e a organização estratégica da intervenção dos professores em contexto sala de aula." Doctoral thesis, Universidade de Évora, 2011. http://hdl.handle.net/10174/12549.
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Este estudo está incorporado nas linhas epistemológicas das Ciências da Educação, inscrito no domínio da Análise da Acção Educativa e na especialidade da Análise dos Contextos Educativos. Resulta da necessidade de dar continuidade ao estudo já iniciado em sede de mestrado e, por isso, de continuar a reflectir para obter uma compreensão mais esclarecedora sobre a problemática do ensino e da aprendizagem em contexto sala de aula, bem como das preocupações em ligar o ensino e a educação a uma perspectiva do desenvolvimento humano.
Numa primeira fase da investigação utilizámos uma metodologia qualitativa de carácter interpretativo, configurada num estudo de caso; e numa segunda fase da investigação utilizámos a linha de Investigação-Acção/formação, preconizada por Barbosa, que radica os seus fundamentos na ideia de que as escolas devem ser montadas como observatórios de necessidades educativas e formativos e geridas numa perspectiva de as tornar mais eficazes e humanizadas.
Arquitectámos a investigação recorrendo a uma processologia própria de acordo com os princípios da Escola Sensível e Transformacionista de Barbosa. Pelo que iniciámos a processologia metodológica com um momento a que designámos caracterização, cujo principal propósito foi o de conhecer e compreender o contexto onde pretendíamos agir. Foi durante esta fase da investigação que construímos um instrumento fulcral da investigação ao qual denominámos Carta de Sinais.
Socorremo-nos das Técnicas do Espelhamento e da Pedagogia de Ajuda junto dos professores, sensibilizando-os para a reconfiguração das práticas educativas e pedagógicas inscritas num instrumento, também de grande importância para a investigação, ao qual designámos Carta Estratégica de Intervenção.
Este estudo pretende contribuir com algo inovador no quadro das Ciências da Educação, perspectivando-se uma melhoria das aprendizagens dos alunos e das práticas dos professores. Assim, promovemos uma formação dos professores orientada para a prática da realização de diagnósticos e de prognósticos que lhes permita fazer intervenções continuadas ao nível das actividades e estratégias desenvolvidas na sala de aula, de forma a responder às necessidades educativas dos alunos, mas também às respectivas necessidades de autoformação. Acreditamos que a formação, tal como refere Paulo Freire (citado em Alarcão
1996, p.187), é um fazer permanente que se refaz constantemente numa acção.; ABSTRACT: This study is consolidated within the epistemological lines of Science Education, engraved in the field of the Analysis of Educational Action and in the expertise of the Analysis of Educational Context. It arose from the need to proceed with the previous initiated study in form of a master’s degree, and therefore to continue to ponder and reflect in order to obtain a more enlightened understanding regarding the problems of teaching and learning within the classroom context, as well as the concerns about connecting teaching and education to a perspective of human development.
Initially in the research we have used a qualitative methodology of interpretative nature, configured in a case study; and on a second phase of the research we have used the line of Research-Action/ Training, proclaimed by Barbosa (Portuguese author and college professor), who has rooted his groundwork in the idea that at the school facilities, observatories for educational needs should be built, managed with the hopes of rendering them more effective and humanized.
The research has been planned by resorting to a particular processology, according to the principles of Barbosa’s literary essay “Escola Sensível e Transformacionista”. So we have introduced the methodological processology with a circumstance we have designated” caracterização” (characterization), whose main purpose was to know and perceive the context where we were seeking to act. It was during that stage of the research that we constructed a key tool of the research which we have named “Carta de Sinais”(Letter of Signals).
We have availed ourselves of the Mirror Techniques and Teaching Aid associated with the teachers, raising their awareness to the reconfiguration of the educational and pedagogical practices registered in a tool, also of great importance to the research, which we’ve designated as “Carta Estratégica de Intervenção” (Strategic Letter of Intervention).
This study seeks to contribute with something innovative to the field of Science Education, hoping for an improvement to the students learning and the teachers practices. Thus, we foment teacher training guided towards the practice of performing diagnostics and prognostics that will enable them to make continued interventions regarding the activities and strategies developed in the classroom in order to respond to the students educational needs, but also to their respective needs of self-training. We believe that training, just like is mentioned by Paulo Freire (quoted by Alarcão in 1996, page 187), it is “a permanent doing that redoes itself constantly in an action.”
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Castro, Nélson José Fernandes. "Sistema de aquisição e comunicação para sensores magnetoelétricos." Master's thesis, 2013. http://hdl.handle.net/1822/39558.
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Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e ComputadoresOs sensores são utilizados para as mais diversas aplicações medindo as mais distintas grandezas analógicas. O propósito desta dissertação é desenvolver um sistema de aquisição de sinal para uma tecnologia recente - os sensores magnetoelétricos (ME), constituídos por uma camada magnetoestritiva (Vitrovac) e uma piezoelétrica (PVDF - Polyvinylidene Fluoride). Para que este compósito ME exiba uma variação do campo magnético contínuo (Hdc), deve existir, simultaneamente, um campo magnético alternado (Hac) a funcionar como campo de excitação. As variações no campo Hdc serão exibidas no sinal de saída do sensor ME como uma mudança na amplitude do sinal. Então, o valor lido em tensão pico a pico, obtido pelo sistema de aquisição de sinal e enviado para uma plataforma computacional ou microprocessador, pode ser utilizado para identificar o valor de campo Hdc ao qual o sensor está sujeito. Para construir um sistema de aquisição de sinal, a metodologia a implementar é baseada em vários estágios do sinal desde a amplificação, conversão de analógico para digital, processamento de dados e comunicações ao nível do firmware. A identificação do nível de campo Hdc pode ser feita através de uma análise prévia, adquirida através da excitação do sensor, com valores linearizados retirados dos dados experimentais obtidos. Os valores de saída do sensor ME são amplificados, convertidos para digital e então armazenados na memória do microcontrolador em forma de amostras do sinal. As amostras são enviadas através de uma comunicação série entre o microcontrolador e o computador. A partir das amostras é obtido no monitor do computador o valor de campo Hdc aplicado ao sensor ME através da cálculo do valor de tensão pico a pico. Subsequentemente, é feita, de uma forma compacta, uma implementação do circuito numa placa de circuito impresso (PCB) do protótipo desenvolvido. Através deste projeto é atingido um sistema pequeno e barato capaz de detetar variações no campo magnético contínuo até 10−6 T, com possibilidade de futuro aperfeiçoamento. As técnicas de produção destes compósitos magnetoelétricos são simples e rápidas. Os materiais são também de baixo custo, contribuindo tudo para um tipo de sensor de custo reduzido, capaz de substituir alguns dos atuais sensores no mercado para gamas de medição do campo magnético como a testada neste projeto entre 0 a 1 mT no campo magnético contínuo. Existem boas expectativas que apontam que, no futuro, este sensor fará parte da integração em dispositivos com aplicações como a magnetocardiografia, a magneto-encefalografia, localização/navegação, entre outras.
Sensors are used in many different applications for measuring the most distinct analogical values. The purpose of this dissertation is to develop a signal acquisition system to a recent technology - the magnetoelectric (ME) sensors, constituted by a magnetostrictive (Vitrovac) and a piezoelectric (PVDF - Polyvinylidene Fluoride) layer. In the last decade, a lot of research has been carried out on this kind of sensors, but not yet for market purposes. In order for this ME composite sense the variations in the continuous magnetic field (Hdc), simultaneously, there must be an alternated magnetic field (Hac) working as an excitation field. The variations in the Hdc will be shown, at the ME sensor output, as a change in the amplitude of its signal. Thereby, the value read in voltage peak to peak obtained by the system to a computational platform or microprocessor, can be used to understand the value of continuous magnetizing field to which the sensor is subjected. To build a signal acquisition system, the methodology to apply is based on amplification, analog to digital conversion, data processing and firmware communications. This can be done by analyzing the signal acquired through the sensor excitation, with linearized values taken from the data obtained from experimental tests. The output values of the ME sensor are amplified, converted to digital and then stored in the microcontroller’s memory in signal samples. The samples are transmitted through a series communication between the microcontroller and the computer. From the samples it’s possible to get the in the computer’s screen the Hdc field value applied to the ME sensor through the computation of the peak to peak voltage value. Subsequently an implementation in a printed circuit board (PCB) of the prototype is done, which must be as compact as possible. It is achieved a cheap and small system which can sense smaller variations in the continuous magnetic field, with a sensibility of 10−6 T, yet with room for improvement. The production techniques of this magnetoelectric composites are simple and fast. Also the materials are cheap contributing to a low cost type of sensor, capable of replacing the current ones on the market, for some reading ranges of magnetic field like the one tested in this project between 0 and 1 mT in the continuous magnetic field. There are good perspectives which pinpoints that, in the future, this sensor will make part of the integration in a variety of devices which are used in fields such as magnetocardiography, magnetoencephalography, localization/navigation, among others. (Xing, Zhai, Dong, Li, Viehland and Odendaal, 2008, p. 19).
Books on the topic "Signaux CARMA"
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Sepúlveda, Jovanny, ed. Investigación en pedagogía y educación: Reflexiones, retos y proposiciones. CUA - Medellin, 2020. http://dx.doi.org/10.52441/edu202005.
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Escribir este preliminar, es para quien lo hace una especie de defensa, y como bien plantea su definición, el prólogo a veces es ajeno a la esencia del texto mismo, puede ser un valor añadido. En este caso, más que el valor complemento, lo que pretendo dejar es la clave para entrar en la esencia del trabajo que usted tiene en sus manos. Y lo hago de esta manera porque no hay duda que en un mundo como el presente se hace necesario crecer como humanos, social y comunitariamente tenemos mucho por hacer, pero especialmente en el campo de la pedagogía, y en la educación, seguimos teniendo mucho por abordar. Así las cosas y de cara a la visión de nuestra Corporación Universitaria, se proponen ejercicios de encuentro con pertinencia y rigor en la investigación para favorecer al desarrollo social. Estamos interesados en los resultados de investigaciones con sustento y fortaleza epistemológica, a la vez que comprometidos con los fundamentos éticos y culturales. Pero ¿quiénes y dónde se desarrolla la comunidad académica a la que hago referencia? Ese problema inicial puede responderse desde una conferencia dictada en 1966 en Montreal por Georges Canguilhem, quien fuera alumno de Gastón Bachelard y maestro de Miche Foucault. Propone que el asunto del Lugar para esa colectividad, son los enfoques y métodos que quienes escriben en este trabajo transitan. Si se sigue la reflexión propuesta por Canguilhem, también pregunta ¿por qué seguir haciendo ciencia en comunidad y siguiendo algunas directrices? ¿Cuáles son las razones para publicar un diálogo científico de este tipo? Y se pueden presentar tres posibles soluciones a estas cuestiones: la primera es una razón de tipo histórica, pues hay un carácter que se exige a quienes dedican su vida a esto de indagar, ya que el mundo que los circunda en condiciones de tiempo y contexto se los exige. Ahora bien, la época dará una segunda razón, ya que la visión de procesos de largo plazo con mayores patrimonios colaborativas, tendrá capacidades y actitudes que procuran participación de numerosos académicos, y será el piso firme para hablar de ciencia. La tercera, y no menos importante razón estará en el orden de lo filosófico, gracias a que, sin referencia a lo epistemológico, cualquier acción científica y de producción de conocimiento terminará siendo simplemente una reflexión vacía y sin sentido, posiblemente una superficial réplica de técnicas y métodos. Al terminar esta entrada al libro, queda la pregunta de ¿Cómo es esa ciencia que sustenta este trabajo? La respuesta que ofrece el epistemólogo propuesto es que lo hace con un carácter para responder a las funciones de las instituciones que las originan, en la medida en que el sondeo del conocimiento y su aplicación, dan origen a las tareas fundamentales de las instituciones universitarias: investigación, docencia y extensión. Entonces, el signo de este libro es externalista, ya que presenta los resultados de investigación de diferentes portentos propios de la pedagogía, que de manera disciplinar asimila aquí una manera natural de discursos que emergen como interpretaciones que quieren acercarse científicamente a la realidad educativa. Lo que se pone en evidencia en este libro es el arrastre del mundo de la vida, de la subjetividad maestros en ejercicio que están interesados en signar su mente conforme la realidad que los inquietan. Con lo antes dicho, el concepto de Pedagogía que persiste a través del texto nos permite avanzar como institución de educación superior y entregar reflexiones del orden disciplinar. De esa manera los autores muestran a través de cada capítulo argumentos y que llenan de significado las abstracciones logradas en una rica diversidad de investigaciones propias del ambiente y los talantes de la educación contemporánea. Se tienen en cuenta creaciones y un mundo de imágenes y creaciones, además que: Es posible romper con los contenidos ceñidos a los límites para dar cuenta de lo real como espacio de sujetos: pensar desde el momento que obliga a hablar también de sus aperturas, lo que alude al movimiento de lo producido como siendo lo constituyente de éste y que transformamos en el ángulo para considerar el momento sin restringirnos a sus estructuras cerradas (Zemelman, 1998, p. 34).
Conference papers on the topic "Signaux CARMA"
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Dishman, Paul, Joshua Groves, and Dale Jolley. "Measuring Retail Visual Cues Using Mobile Bio-metric Responses." In CARMA 2018 - 2nd International Conference on Advanced Research Methods and Analytics. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/carma2018.2018.8287.
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This research provides the results of a comprehensive in-store study that utilized eye tracking to determine the initial eye attractiveness of signage and displays used in a Toyota retail dealership. Potential car buyers (n = 24) walked randomly through the showroom for the first time, and were asked to view the various signs, displays, video monitors, decorations, and vehicles on display. Research was conducted while the dealership was open in order to include distractions from human interaction. Subjects’ eye movements and the objects viewed were captured using Tobii II eye tracking glasses at 60Mhz. A typical showroom self-tour lasted approximately 4:31 minutes. Subjects were then shown their results and Retrospective Think Aloud interviews were conducted with the subjects to determine positive and negative reactions to the observed objects. Signage measured included those required by Toyota, as well as those created by the dealership. Types of signage measured included digital, video, posters, stand-up cards, and ads placed on the vehicle. Each potential eye attractive object was identified and classified by type (signage, décor, digital signage, vehicle information, etc.). Every subject’s results were analyzed by the number of fixations and the time spent viewing each object. The study revealed that video or digital messaging was not any more effective than static signage, but that placement of the signage was a determining factor in the effectiveness of message receptivity. Many of the non-signage objects received more attention than did certain types of advertising signage. The various attributes of the objects and signs that received positive attention were analyzed as to their eye attactiveness characteristics. Although signage in a retail showroom is believed to be critical in providing advertising and product messages, this study (in its particular environment) demonstrated that signage is not viewed by customers as often as previouly thought.
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Baca, Alessandro, Giorgio Biagetti, Marta Camilletti, Paolo Crippa, Laura Falaschetti, Simone Orcioni, Luca Rossini, Dario Tonelli, and Claudio Turchetti. "CARMA: A robust motion artifact reduction algorithm for heart rate monitoring from PPG signals." In 2015 23rd European Signal Processing Conference (EUSIPCO). IEEE, 2015. http://dx.doi.org/10.1109/eusipco.2015.7362864.
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Pekar, Viktor. "Mining for Signals of Future Consumer Expenditure on Twitter and Google Trends." In CARMA 2018 - 2nd International Conference on Advanced Research Methods and Analytics. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/carma2018.2018.8337.
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Consumer expenditure constitutes the largest component of Gross Domestic Product in developed countries, and forecasts of consumer spending are therefore an important tool that governments and central bank use in their policy-making. In this paper we examine methods to forecast consumer spending from user-generated content, such as search engine queries and social media data, which hold the promise to produce forecasts much more efficiently than traditional surveys. Specifically, the aim of the paper is to study the relative utility of evidence about purchase intentions found in Google Trends versus those found in Twitter posts, for the problem of forecasting consumer expenditure. Our main findings are that, firstly, the Google Trends indicators and indicators extracted from Twitter are both beneficial for the forecasts: adding them as exogenous variables into regression model produces improvements on the pure AR baseline, consistently across all the forecast horizons. Secondly, we find that the Google Trends variables seem to be more useful predictors than the semantic variables extracted from Twitter posts, the differences in performance are significant, but not very large.
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Bianchi, Annamaria, Camilla Salvatore, and Silvia Biffignandi. "Communicating Corporate Social Responsibility through Twitter: a topic model analysis on selected companies." In CARMA 2020 - 3rd International Conference on Advanced Research Methods and Analytics. Valencia: Universitat Politècnica de València, 2020. http://dx.doi.org/10.4995/carma2020.2020.11646.
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Social media are fundamental in creating new opportunities for firms and they represent a relevant tool for the communication and the engagement with customers. The purpose of this paper is to analyse the communication of Corporate Social Responsibility (CSR) activities on Twitter. We consider the listed companies included in the Dow Jones Industrial Average Index and we implement a topic model analysis on their timelines. In order to identify the topic discussed, their correlation, and their evolution over time and sectors,we apply the Structural Topic Model algorithm, which allows estimating the model including document-level metadata. This model proves to be a powerful tool for topic detection and for estimating the effects of document-level metadata. Indeed, we find that the topics are overall well identified, and the model allows catching signals from the data. Finally, we discuss issues related to the validity of the analysis, including data quality problems.
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Koch, Olivier. "Comparison of Multipactor Analysis Methods for Galileo Signals." In 2018 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2018. http://dx.doi.org/10.1109/cama.2018.8530632.
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Cheng, Luo, Zhang Qinyu, Xie Weixin, and Yu Jia. "Heterogeneous sensor networks traffic control algorithm based on CARIMA prediction." In 2016 IEEE 13th International Conference on Signal Processing (ICSP). IEEE, 2016. http://dx.doi.org/10.1109/icsp.2016.7878115.
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Trinh, L. H., V. X. Bui, F. Ferrero, T. Q. K. Nguyen, and M. H. Le. "Signal propagation of LoRa technology using for smart building applications." In 2017 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2017. http://dx.doi.org/10.1109/cama.2017.8273458.
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Sorokin, A. K., and V. G. Vazhenin. "Algorithm of border detection of underlying surfaces by pulse altimeter signal." In 2014 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2014. http://dx.doi.org/10.1109/cama.2014.7003375.
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Chio, Chi-Hou, and Sio-Weng Ting. "Measurement of signal attenuation in bridge-tunnel for light rail system." In 2015 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2015. http://dx.doi.org/10.1109/cama.2015.7428149.
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Honda, Junichi, Masato Watanabe, Yoshio Makita, and Takuya Otsuyama. "Relationship between receiving antenna pattern and aircraft position using DTTB signal delays." In 2017 IEEE Conference on Antenna Measurements & Applications (CAMA). IEEE, 2017. http://dx.doi.org/10.1109/cama.2017.8273390.
Full textReports on the topic "Signaux CARMA"
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Schnitta-Israel, B. Robust Detection and Classification of Regional Seismic Signals Using a Two Mode/Two Stage Cascaded Adaptive Arma (CAARMA) Model. Fort Belvoir, VA: Defense Technical Information Center, March 1985. http://dx.doi.org/10.21236/ada154710.
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