Standard Model Extension
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Free three-dimensional image software in local extension assessment of oral squamous cell carcinoma: a pilot study
Abstract Objective: Oral Squamous Cell Carcinoma (OSCC) is conventionally treated by surgical resection, and positive surgical margins strongly increase local recurrence and decrease survival. This study aimed to evaluate whether a Three-Dimensional Segmentation (3DS) image of OSCC confers advantage over Multiplanar Reconstruction (MPR) of OSCC using images
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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2. Ultrassonografia e CA-125 como preditores de malignidade em mulheres com tumores anexiais / Ultrasonography and CA-125 as predictors of malignancy in women with adnexal tumors
Introduction: Ovarian cancer is the deadliest gynecologic neoplasm and it is the fifth leading cause of cancer-related deaths in women. The survival rate is low, not exceeding 40% after 5 years and is directly related to tumor stage at the time of diagnosis. To date there is still no screening method that is effective at reducing mortality from this neoplasm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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3. AvaliaÃÃo da eficiÃncia acadÃmica dos cursos de graduaÃÃo da Universidade Federal do Cearà (UFC): utilizaÃÃo de indicadores de desempenho como elementos estratÃgicos da gestÃo / Evaluating the effectiveness of academic degree courses at the Universidade Federal do Cearà (UFC): use of performance indicators as elements of strategic management
The Federal Institutes of Higher Education are in an accelerated transformation process in their administration due to an increasing social demand for agile answers to complex challenges. Trying to establish a better standard of academic performance in Higher Education, capable to guarantee a better quality of its services to society in general, it is necess
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/05/2011
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4. O espectro de escalares do mecanismo seesaw triplo
Nesta dissertação estudamos algumas extensões do Modelo Padrão que acomodam massa para neutrinos. Para a explicação do déficit de neutrinos solares e atmosféricos observados na Terra, o fenômeno da oscilação de sabores entre as famílias requer que neutrinos tenham autoestados físicos massivos. Para isso, construímos possíveis termos de massa d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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5. Proposta de um modelo para projetos lógicos gráficos para BDOR com implementação no ArgoUML. / Proposal of a model for logical graphic projects for ORDB with implementation in the ArgoUML.
A Logical Graphic Model was proposed to support the Logical Design phase in ORDB. The Logical Graphic Model proposed is an extension of the UML Class Diagram. The extension was obtained by the elaboration of a UML Profile, which was released in XMI to be used in CASE tools from different manufacturers. Two modules were developed for ArgoUML CASE tool. These
Publicado em: 2011
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6. On the aubry-mather theory for symbolic dynamics
We propose a new model of ergodic optimization for expanding dynamical systems: the holonomic setting. In fact, we introduce an extension of the standard model used in this theory. The formulation we consider here is quite natural if one wants a meaning for possible variations of a real trajectory under the forward shift. In other contexts (for twist maps, f
Publicado em: 2011
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7. Modelo logístico generalizado dependente do tempo com fragilidade
Several authors have preferred to model survival data in the presence of covariates through the hazard function, a fact related to its interpretation. The hazard function describes as the instantaneous average of failure changes over time. In this context, one of the most used models is the Coxs model (1972), in which the basic supposition for its use is tha
Publicado em: 2011
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8. The modified 2VO ischemia protocol causes cognitive impairment similar to that induced by the standard method, but with a better survival rate
Permanent bilateral occlusion of the common carotid arteries (2VO) in the rat has been established as a valid experimental model to investigate the effects of chronic cerebral hypoperfusion on cognitive function and neurodegenerative processes. Our aim was to compare the cognitive and morphological outcomes following the standard 2VO procedure, in which ther
Publicado em: 2011
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9. Padrões climáticos atuais e futuros de temperatura do ar na Região Sul do Brasil e seus impactos nos cultivos de pêssego e de nectarina em Santa Catarina / Current and future air temperature climatic patterns in the South Region of Brazil: the impacts on peach and nectarine production in Santa Catarina
Over the years, climate changes and their direct impacts were observed in different parts of the globe. The present study considers the main air temperature patterns, including their extreme values, in Southern Brazil and assesses their impacts on peach and nectarine production. The analysis is based on daily air temperatures recorded at weather stations dis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2010
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10. The modified 2VO ischemia protocol causes cognitive impairment similar to that induced by the standard method, but with a better survival rate
Permanent bilateral occlusion of the common carotid arteries (2VO) in the rat has been established as a valid experimental model to investigate the effects of chronic cerebral hypoperfusion on cognitive function and neurodegenerative processes. Our aim was to compare the cognitive and morphological outcomes following the standard 2VO procedure, in which ther
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-12
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11. Guias de onda com um ambiente para testes de uma eletrodinâmica com violação das simetrias de Lorentz e CPT / Waveguides as a way of testing an electrodynamics with broken Lorentz and CPT symmetries
We study a CPT- and Lorentz-odd electrodynamics in (3+1) dimensions, obtained by adding a Chern-Simons-like term to the usual Maxwell model, as described by the radiation sector of the Standard Model Extension. Once this term is proportional to a constant background "4-vector", (kAF), wich selects a preferred direction in the spacetime (breaking its isotropy
Publicado em: 2010
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12. Espalhamento de Férmions sob Influencia da Violação de Lorentz no Setor Fotônico / Scattering of Fermions under Influence of Violation Lorentz Sector Photonic
The standard model extension is a theoretical framework which includes the possibility of Lorentz symmetry violation in the Standard Model of elementary interactions. In electrodynamics, this possibility is represented by the term, KμFμF, that violates Lorentz symmetry without jeopardizing CPT symmetry, and the term "μvAμ@A, which violate
Publicado em: 2010