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A reference business process for ecological niche modelling

SANTANA, F. S.; SIQUEIRA, M. F. de; SARAIVA, A. M.; CORREA, P. L. P.
Fonte: ELSEVIER SCIENCE BV Publicador: ELSEVIER SCIENCE BV
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
45.73%
Ecological niche modelling combines species occurrence points with environmental raster layers in order to obtain models for describing the probabilistic distribution of species. The process to generate an ecological niche model is complex. It requires dealing with a large amount of data, use of different software packages for data conversion, for model generation and for different types of processing and analyses, among other functionalities. A software platform that integrates all requirements under a single and seamless interface would be very helpful for users. Furthermore, since biodiversity modelling is constantly evolving, new requirements are constantly being added in terms of functions, algorithms and data formats. This evolution must be accompanied by any software intended to be used in this area. In this scenario, a Service-Oriented Architecture (SOA) is an appropriate choice for designing such systems. According to SOA best practices and methodologies, the design of a reference business process must be performed prior to the architecture definition. The purpose is to understand the complexities of the process (business process in this context refers to the ecological niche modelling problem) and to design an architecture able to offer a comprehensive solution...

Transformação de redes de Petri coloridas em processos de decisão markovianos com probabilidades imprecisas.; Conversion from colored Petri nets into Markov decision processes with imprecise probabilities.

Eboli, Mônica Goes
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 01/07/2010 PT
Relevância na Pesquisa
35.81%
Este trabalho foi motivado pela necessidade de considerar comportamento estocástico durante o planejamento da produção de sistemas de manufatura, ou seja, o que produzir e em que ordem. Estes sistemas possuem um comportamento estocástico geralmente não considerado no planejamento da produção. O principal objetivo deste trabalho foi obter um método que modelasse sistemas de manufatura e representasse seu comportamento estocástico durante o planejamento de produção destes sistemas. Como os métodos que eram ideais para planejamento não forneciam a modelagem adequada dos sistemas, e os com modelagem adequada não forneciam a capacidade de planejamento necessária, decidiu-se combinar dois métodos para atingir o objetivo desejado. Decidiu-se modelar os sistemas em rede de Petri e convertê-los em processos de decisão markovianos, e então realizar o planejamento com o ultimo. Para que fosse possível modelar as probabilidades envolvidas nos processos, foi proposto um tipo especial de rede de Petri, nomeada rede de Petri fatorada. Utilizando este tipo de rede de Petri, foi desenvolvido o método de conversão em processos de decisão markovianos. A conversão ocorreu com sucesso, conforme testes que mostraram que planos podem ser produzidos utilizando-se algoritmos de ponta para processos de decisão markovianos.; The present work was motivated by the need to consider stochastic behavior when planning the production mix in a manufacturing system. These systems are exposed to stochastic behavior that is usually not considered during production planning. The main goal of this work was to obtain a method to model manufacturing systems and to represent their stochastic behavior when planning the production for these systems. Because the methods that were suitable for planning were not adequate for modeling the systems and vice-versa...

A methodology and a tool to design of mixed-signal technology

Da Silva, Alexandre César Rodrigues; Grout, Ian
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 164-169
ENG
Relevância na Pesquisa
35.8%
This paper presents a tool box developed to read files describing a SIMULINK® model and translates it into a structural VHDL-AMS description. In translation process, all files and directory structures to simulate the translated model on SystemVision™ environment is generate. The tool box named MS2SV was tested by three models of commercially available digital-to-analogue converters. All models use the R2R ladder network to conversion, but the functionality of these three components is different. The methodology of conversion of the model is presents together with sort theory about R-2R ladder network. In the evaluation of the translated models, we used a sine waveform input signal and the waveform generated by D/A conversion process was compared by FFT analysis. The results show the viability of this type of approach. This work considers some of challenges set by the electronic industry for the further development of simulation methodologies and tools in the field of mixed-signal technology. © 2007 IEEE.

Montagem, instrumentação, controle e desenvolvimento experimental de um processo fermentativo extrativo de produção de etanol.; Assembly, instrumentation, control and experimental development of a extrativo fermentation process of production of etanol.

Daniel Ibraim Pires Atala
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 16/12/2004 PT
Relevância na Pesquisa
35.84%
O avanço tecnológico da indústria alcooleira no Brasil nas décadas de 70 e 80, foi fruto do programa ?Proálcool?, lançado pelo governo brasileiro com o objetivo de substituir a gasolina derivada do petróleo, consumida pelos veículos automotores, pelo etanol. O Brasil se tornou então o maior produtor mundial de etanol por via fermentativa. Apesar disto, os estudos encontrados na bibliografia têm como base um processo isotérmico. Em condições reais de operação encontradas nas usinas, isso nem sempre é observado, entretanto, o estudo do efeito da temperatura nos parâmetros cinéticos que quantificam a reprodução e morte celular, o consumo de substrato e a produção de etanol são informações importantes para a elaboração de estratégias de controles mais eficientes nas usinas. Diante destes fatos o objetivo deste trabalho foi a obtenção de um modelo cinético estudando o efeito da temperatura em fermentação alcoólica com alta densidade celular, com a convalidação dos parâmetros cinéticos e de conversão considerando o efeito inibitório exercido pela concentração de biomassa, substrato e de etanol no processo fermentativo. Os experimentos foram conduzidos em fermentação batelada e batelada alimentada estendida com 6DFFKDURP HV_ FHUHYLVLDH...

Estratégia alternativa de otimização em duas camadas de uma unidade de craqueamento catalítico-FCC : implementação de algoritmos genéticos e metodologia híbrida de otimização; Two layers approach alternative optimization strategy of a fluid catalytic cracking unit ¿ FCC : genetic algorithms and hybrid optimization strategy implementation

José Fernando Cuadros Bohórquez
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/11/2012 PT
Relevância na Pesquisa
35.98%
Esta pesquisa teve por finalidade o desenvolvimento de uma metodologia de otimização em duas camadas. A otimização preliminar foi baseada na técnica de planejamento de experimentos junto com a metodologia por superfície de resposta com a finalidade de identificar uma possível região de busca do ponto de operação ótimo, o qual foi obtido através da implementação de métodos híbridos de otimização desenvolvidos mediante associação do modelo determinístico de otimização por programação quadrática sucessiva (SQP) com a técnica dos algoritmos genéticos (GA) no modelo do processo de craqueamento catalítico fluidizado- FCC. Este processo é caracterizado por ser um sistema heterogêneo e não isotérmico, cuja modelagem detalhada engloba as equações de balanço de massa e energia das partículas do catalisador, como também para a fase líquida e gasosa, sendo um dos casos de estudo para a aplicação da metodologia de otimização desenvolvida. Como caso de estudo principal foi considerado o modelo do conversor do processo de FCC desenvolvido por Moro e Odloak (1995). Mediante a metodologia de otimização do processo baseado no uso do modelo determinístico da planta, foram definidas estratégias e políticas operacionais para a operação da unidade de FCC em estudo. Procurou-se alto nível de desempenho e segurança operacional...

Desenvolvimento de processo biotecnológico na síntese do ácido propanóico por fermentação da glicerina; Development biotechnological process in syntesis propionic acid by fermentation of glycerin

Dayana de Gusmão Coêlho
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/08/2014 PT
Relevância na Pesquisa
35.86%
Para a evolução da ciência e melhoramento na qualidade de vida, o uso da tecnologia é imprescindível para solucionar os problemas relacionados com o uso desenfreado dos recursos naturais e poluição ambiental. A substituição de recursos não renováveis tem se apresentado como uma solução alternativa, na qual uma nova rota para a produção de ácido propanóico está inserida nesses preceitos. Atualmente a larga escala de produção do ácido propanóico advém da rota petroquímica, e a utilização da glicerina para a produção de ácidos orgânicos se tornou uma alternativa para amenizar os danos sensíveis ao meio ambiente. No entanto, a tese apresentada retrata de uma alternativa de síntese do ácido propanóico por rota fermentativa, neste são apresentadas as etapas do processo, desde a matéria-prima ao produto final. Neste âmbito surgem os estudos de análise e seleção do meio de cultura apresentando o direcionamento na escolha de alguns sais, do extrato de levedura e da concentração de glicerina em relação ao rendimento, eficiência e conversão em ácido propanóico, nesse estudo foi possível obter um rendimento de 80% na produção do ácido propanóico, uma eficiência de 99 % e conversão de 67 % para as concentrações de 20 g/L para a glicerina...

Advanced optical modulation and format conversion; Modulação e conversão de formatos óticos avançados

Dionísio, Rogério Pais
Fonte: Universidade de Aveiro Publicador: Universidade de Aveiro
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
45.8%
Over the years, the increased search and exchange of information lead to an increase of traffic intensity in todays optical communication networks. Coherent communications, using the amplitude and phase of the signal, reappears as one of the transmission techniques to increase the spectral efficiency and throughput of optical channels. In this context, this work present a study on format conversion of modulated signals using MZI-SOAs, based exclusively on all- optical techniques through wavelength conversion. This approach, when applied in interconnection nodes between optical networks with different bit rates and modulation formats, allow a better efficiency and scalability of the network. We start with an experimental characterization of the static and dynamic properties of the MZI-SOA. Then, we propose a semi-analytical model to describe the evolution of phase and amplitude at the output of the MZI-SOA. The model’s coefficients are obtained using a multi-objective genetic algorithm. We validate the model experimentally, by exploring the dependency of the optical signal with the operational parameters of the MZI-SOA. We also propose an all-optical technique for the conversion of amplitude modulation signals to a continuous phase modulation format. Finally...

Inference of conversion and purity for ETBE reactive distillation

Yu-Chu,Tian; Tadé,M.O.
Fonte: Brazilian Society of Chemical Engineering Publicador: Brazilian Society of Chemical Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2000 EN
Relevância na Pesquisa
35.84%
Reactive distillation (RD), an unconventional and attractive technique, has been applied in fuel ether production. A typical application of RD is the synthesis of the widely used methyl tert-butyl ether (MTBE). RD has also been found to have potential to produce high quality ethyl tert-butyl ether (ETBE), a potential alternative to MTBE. A RD process integrates conventional reaction and separation into a single unit, resulting in extra complexity and dual process objectives, i.e. maximization of reactant conversion and purity of products. The conversion and the purity are thus important variables to be controlled in RD of ETBE. Unfortunately, both of them are not economically and reliably available for closed-loop control. This study aims to develop an effective method to infer the conversion and the purity from multiple temperature measurements that are easily available on-line and in real time. Nonlinear inferential models are recommended for ETBE synthesis with a ten-stage pilot scale RD column. The models are two-variable third-order regressive models, in which the temperature measurements of the reboiler and the bottom reactive section are employed. Experimental design, model identification, and model testing are also investigated.

Mode conversion current drive experiments on Alcator C-Mod

Parisot, Alexandre, 1979-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 197 p.
ENG
Relevância na Pesquisa
35.86%
In tokamak plasmas with multiple ion species, fast magnetosonic waves (FW) in the Ion Cyclotron Range of Frequency can mode convert to shorter wavelength modes at the Ion-Ion hybrid layer, leading to localized electron heating and current drive. Due to k1l upshifts associated with the poloidal magnetic field, only small net driven currents were predicted from mode converted Ion Bernstein Waves (IBW). As studied first by Perkins, and later confirmed experimentally with Phase Contrast Imaging measurements on Alcator C-Mod, poloidal field effects can also lead to mode conversion to Ion Cyclotron Waves (MCICW), on the low field side of the mode conversion layer. In this thesis, mode conversion current drive in the ICW-dominated regime is studied numerically and through experiments on Alcator C-Mod. Solving a dispersion relation for the mode converted waves in a slab geometry relevant to tokamak equilibria and in the finite Larmor radius limit, we find that mode conversion to Ion Cyclotron Waves is ubiquitous to high temperature conventional tokamaks, as a result of the central value for the safety factor qo 1. MCICWs are identified as kinetically modified Ion Cyclotron Waves in the regime w/kllVthe < 1. Full wave simulations with the TORIC code predict net currents can be driven by MCICW as a result of up-down asymmetries in the mode conversion process. Initial estimates with the Ehst-Karney parametrization indicated up to -- 100 kA could be driven for 3 MW input power in C-Mod plasmas. More accurate calculations...

Qualitative vs. quantitative software process simulation modelling: conversion and comparison

Zhang, He; Kitchenham, Barbara; Jeffery, Ross
Fonte: IEEE Computer Society Publicador: IEEE Computer Society
Tipo: Conference item; all_ul_research; ul_published_reviewed; none
ENG
Relevância na Pesquisa
35.88%
peer-reviewed; Software Process Simulation Modeling (SPSM) research has increased in the past two decades. However, most of these models are quantitative, which require detailed understanding and accurate measurement. As the continuous work to our previous studies in qualitative modeling of software process, this paper aims to investigate the structure equivalence and model conversion between quantitative and qualitative process modeling, and to compare the characteristics and performance of these two approaches by modeling and simulating a software evolution process. Following the model conversion scheme, the reference quantitative (SD) model and the corresponding qualitative model become comparable. The results present their different capabilities and interesting perspectives, and further the potential use of qualitative modeling in software process research.

Pratiche di Liberazione; Analisi dei processi di adesione al Buddhismo

IACOBUCCI, MIRKO
Fonte: La Sapienza Universidade de Roma Publicador: La Sapienza Universidade de Roma
Tipo: Tese de Doutorado
IT
Relevância na Pesquisa
65.88%
L’indagine analizza, avvalendosi di un disegno di ricerca prevalentemente descrittivo-esplorativo, il processo di conversione religiosa al Buddhismo in ambiente urbano. La rete teorica predisposta unisce i contributi offerti dalla letteratura sociologica concernente i processi di conversione religiosa e il Western Buddhism al più ampio dibattito riguardante il processo di secolarizzazione, la post-modernità, il religioso contemporaneo, l’atteggiamento religioso e l’emergente paradigma teorico della spiritualità. La rilevazione empirica si avvale di interviste qualitative e questionari standardizzati somministrati ad un campione di 38 buddhisti residenti a Roma suddivisi in base al tempo di adesione (lungo e breve periodo) e alla scuola di appartenenza (Theravada, Vajrayana, Zen). L’analisi mostra significative divergenze rispetto al conversion model classico. Il processo, definito di adesione poiché può non comportare una conversione in senso proprio, è suddiviso nella fasi di: background religioso e allontanamento dalla religione di prima socializzazione; avvicinamento al Buddhismo (caratterizzato da diverse combinazioni di pregressa ricerca religiosa, turning point, mediatore religioso); ingresso nel Buddhismo (sperimentale di benessere...

Strategies for Efficient Exploitation of Solar Energy: A Model of the Photovoltaic Conversion Process Based on TRIZ, the Theory of Inventive Problem Solving

POLVERINI Davide; GRAZIOSI Serena; TAYLOR Nigel
Fonte: WIP Publicador: WIP
Tipo: Contributions to Conferences Formato: DVD
ENG
Relevância na Pesquisa
45.72%
While PV has been developing dramatically in the last few years, the scope for improving energy conversion remains enormous, as witnessed by gap between the efficiency of commercial products (10-20%) and a theoretical potential for reaching over 60%. In this context it is important to be able to horizon-scan for new and improved concepts in a systematic and structured way. The Theory of Inventive Problem Solving (also known as TRIZ) has been applied to analyse the PV conversion process, taking a c-Si cell as the baseline scenario. Comparison of several innovative concepts with this baseline highlights their potential impact on loss mechanisms. The approach has the potential to provide important insights for future PV technology innovation, although further work is needed.; JRC.F.7-Renewable Energy

Experimental study and Monte Carlo modeling of object motion in a bubbling fluidized bed

García Gutiérrez, Luis Miguel
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
35.99%
Fluidized beds are employed for a wide variety of applications such as drying, coating of particles, catalytic reactions, or thermal conversion processes. In a number of these applications, objects differing in density and/or size from the dense phase material are found in the bed. These objects can be agglomerates, catalysts or reactants. In this PhD thesis, a fundamental study of the motion of objects is presented, but considering also the main characteristics of the thermal conversion processes for these objects. Fluidized beds are used for the thermal conversion of fuels with low heating value and/or large humidity content, applications in which the high heat and mass transfer exchange provided by fluidized beds becomes relevant. In general, fuel particles of such characteristics are much larger in size than the dense phase material, and have a density that can range between the density of the dense bed to rather smaller values. In all cases, a good mixing of the fuel particles throughout the bed involves a higher efficiency in the thermal conversion process. In fluidized beds, the mixing rate in the vertical direction is higher than that in the lateral direction, as a result of the bubble motion. A proper distribution of the fuel particles in the whole bed is fundamental for an adequate development of the chemical reaction...

Applications du processus ancestral avec recombinaison et conversion en génétique statistique

Saidi, Lamiae
Fonte: Université de Montréal Publicador: Université de Montréal
Tipo: Thèse ou Mémoire numérique / Electronic Thesis or Dissertation
FR
Relevância na Pesquisa
35.87%
Le processus ancestral est appliqué pour étudier la variabilité génétique et la mesure de déséquilibre de liaison de séquences d’ADN, et faire de l’inférence statistique sur les divers facteurs responsables de cette variabilité. En tenant compte, en premier lieu, des facteurs de dérive génétique, de mutation, et de recombinaison, les calculs exacts de la mesure de déséquilibre de liaison de deux loci sont retrouvés. De plus, une approximation du processus exact, SMC (sequentially Markov chain), est utilisée pour trouver la mesure d’association à deux loci, et une formule de covariance pour calculer cette mesure est corrigée. En intégrant le facteur de conversion dans le modèle de Moran, on trouve l’espérance des mesures de polymorphisme exprimées par les espérances des mesures de variation intra-locus et inter-locus. Celles-ci sont calculées à l’aide de temps espérés dans les états ancestraux. De plus, l’espérance du déséquilibre de liaison est trouvée et il est montré qu’elle diminue quand le taux de recombinaison augmente. En utilisant ces résultats théoriques, on présente une méthode pour estimer les paramètres de mutation, de recombinaison, et de conversion.; The ancestral process is applied to investigate the amount of DNA variation and the amount of linkage disequilibrium ; it is also applied to make statistical inference about the multiple factors responsible for this variation. Considering genetic drift...

DEMO models based automatic workflow process generation; Geração de processos automáticos de workflow baseados em modelos

Figueira, Carlos Alberto da Silva
Fonte: Universidade da Madeira Publicador: Universidade da Madeira
Tipo: Dissertação de Mestrado
Publicado em /09/2013 ENG
Relevância na Pesquisa
45.66%
Nowadays, more than half of the computer development projects fail to meet the final users' expectations. One of the main causes is insufficient knowledge about the organization of the enterprise to be supported by the respective information system. The DEMO methodology (Design and Engineering Methodology for Organizations) has been proved as a well-defined method to specify, through models and diagrams, the essence of any organization at a high level of abstraction. However, this methodology is platform implementation independent, lacking the possibility of saving and propagating possible changes from the organization models to the implemented software, in a runtime environment. The Universal Enterprise Adaptive Object Model (UEAOM) is a conceptual schema being used as a basis for a wiki system, to allow the modeling of any organization, independent of its implementation, as well as the previously mentioned change propagation in a runtime environment. Based on DEMO and UEAOM, this project aims to develop efficient and standardized methods, to enable an automatic conversion of DEMO Ontological Models, based on UEAOM specification into BPMN (Business Process Model and Notation) models of processes, using clear semantics, without ambiguities...

Irreversible k-threshold and majority conversion processes on complete multipartite graphs and graph products

Adams, Sarah Spence; Brass, Zachary; Stokes, Connor; Troxell, Denise Sakai
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 25/02/2011
Relevância na Pesquisa
35.83%
In graph theoretical models of the spread of disease through populations, the spread of opinion through social networks, and the spread of faults through distributed computer networks, vertices are in two states, either black or white, and these states are dynamically updated at discrete time steps according to the rules of the particular conversion process used in the model. This paper considers the irreversible k-threshold and majority conversion processes. In an irreversible k-threshold (resp., majority) conversion process, a vertex is permanently colored black in a certain time period if at least k (resp., at least half) of its neighbors were black in the previous time period. A k-conversion set (resp., dynamic monopoly) is a set of vertices which, if initially colored black, will result in all vertices eventually being colored black under a k-threshold (resp., majority) conversion process. We answer several open problems by presenting bounds and some exact values of the minimum number of vertices in k-conversion sets and dynamic monopolies of complete multipartite graphs, as well as of Cartesian and tensor products of two graphs.

Kinetic simulation of the O-X conversion process in dense magnetized plasmas

Asgarian, M Ali; Verboncoeur, J P; Parvazian, A; Trines, R
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 24/07/2013
Relevância na Pesquisa
35.81%
The ordinary-extraordinary-Bernstein (O-X-B) double conversion is considered and simulated with a kinetic particle model vs full wave model for parameters of the TJ-II stellarator. This simulation has been done with the particle-in-cell code, XOOPIC (X11-based object-oriented particle-incell). XOOPIC is able to model the non-monotonic density and magnetic profile of TJ-II. The first step of conversion, O-X conversion, is observed clearly. By applying some optimizations such as increasing the number of computational particles in the region of the X-B conversion, the simulation of the second step is also possible. By considering the electric and magnetic components of launched and reflected waves, the O-mode wave and the X-mode wave can be easily detected. Via considering the power of launched O-mode wave and converted X-mode wave, the efficiency of O-X conversion for the best theoretical launch angle is obtained, which is in good agreement with previous computed efficiencies via full-wave simulations. For the optimum angle of 47? between the wave-vector of the incident O-mode wave and the external magnetic field, the conversion efficiency is 66%.

Quantum correlations of twophoton polarization states in the parametric down-conversion process

Dotsenko, Ivan S.; Voronov, Volodymyr G.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.67%
We consider correlation properties of twophoton polarization states in the parametric down-conversion process. In our description of polarization states we take into account the simultaneous presence of colored and white noise in the density matrix. Within the considered model we study the dependence of the von Neumann entropy on the noise amount in the system and derive the separability condition for the density matrix of twophoton polarization state, using Perec-Horodecki criterion and majorization criterion. Then the dependence of the Bell operator (in CHSH form) on noise is studied. As a result, we give a condition for determining the presence of quantum correlation states in experimental measurements of the Bell operator. Finally, we compare our calculations with experimental data [doi:10.1103/PhysRevA.73.062110] and give a noise amount estimation in the photon polarization state considered there.; Comment: 10 pages, 7 figures; corrected typos

Well-posedness and generalized plane waves simulations of a 2D mode conversion model

Imbert-Gérard, Lise-Marie
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
35.88%
Certain types of electro-magnetic waves propagating in a plasma can undergo a mode conversion process. In magnetic confinement fusion, this phenomenon is very useful to heat the plasma, since it permits to transfer the heat at or near the plasma center. This work focuses on a mathematical model of wave propagation around the mode conversion region, from both theoretical and numerical points of view. It aims at developing, for a well-posed equation, specific basis functions to study a wave mode conversion process. These basis functions, called generalized plane waves, are intrinsically based on variable coefficients. As such, they are particularly adapted to the mode conversion problem. The design of generalized plane waves for the proposed model is described in detail. Their implementation within a discontinuous Galerkin method then provides numerical simulations of the process. These first 2D simulations for this model agree with qualitative aspects studied in previous works.

Higgs-mediated muon-electron conversion process in supersymmetric seesaw model

Kitano, Ryuichiro; Koike, Masafumi; Komine, Shinji; Okada, Yasuhiro
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
45.77%
We study the effect of the Higgs-exchange diagram for the lepton flavor violating muon-electron conversion process in nuclei in the supersymmetric seesaw model. The contribution is significant for a large value of tan beta and a small value of a neutral heavy Higgs boson mass, in which case the ratio of the branching ratios of B(mu N -> e N) / B(mu -> e gamma) is enhanced. We also show that the target atom dependence of the conversion branching ratio provides information on the size of the Higgs exchange diagram.; Comment: 12 pages, 2 figures, a reference added