Symmetry
Mostrando 1-12 de 1530 artigos, teses e dissertações.
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1. Assessing suicide risk in patients with obsessive-compulsive disorder: a dimensional approach
Objectives: Although an association has been found recently between obsessive-compulsive disorder and an increased risk of suicide, the prevalence of both suicidal ideation and attempts vary considerably and are generally assessed categorically. Our aims were to evaluate the prevalence of suicidal ideation and behaviors using a dimensional approach. Methods
Brazilian Journal of Psychiatry. Publicado em: 2023
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2. RING CURRENT IN ANTHRACENE AND PHENANTHRENE: CORRECTION TO HÜCKEL PARAMETERS
Excessive degeneracy in the ground state of the π-electron energy levels of anthracene was removed using the Hückel method by correcting the Coulomb integral of the four central carbon atoms. A further correction to the resonance integral was proposed based on the ring-current model, which describes the π-ring current flow along the molecule’s perimeter
Química Nova. Publicado em: 2022
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3. Analysis of the mandibular molars root canals morphology. Study by computed tomography
Abstract This study aimed to analyze the root and root canal morphology of mandibular first and second molars using CBCT images. A total of 2,400 mandibular molars exams were selected from 600 patients aged between 18 and 75 years. The number of roots, number of root canals, and root canal configuration according to the Vertucci classification were verified.
Brazilian Dental Journal. Publicado em: 2022
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4. Similarity as an extension of symmetry and its application to superrationality
Abstract In this paper we present a concept of similarity in games, on which to ground alternative solution concepts, some of which differ from the classical notions in the field. In order to do this we impose a constraint on players’ beliefs that amounts to a variant of the well-known symmetry principle in classical bargaining theory. We show how this sim
Manuscrito. Publicado em: 2021-06
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5. Associação entre vitamina D sérica e rinossinusite crônica: uma metanálise
Resumo Introdução: A rinossinusite crônica é uma inflamação crônica altamente heterogênea do trato respiratório superior causada por uma disfunção imune nos seres humanos. Entretanto, a etiologia subjacente dessa doença ainda não foi bem estabelecida. Diversos estudos revelaram que anormalidades nos níveis séricos de vitamina D podem desempen
Braz. j. otorhinolaryngol.. Publicado em: 2021-04
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6. MÉTODO MANUAL PARA DEPOSIÇÃO DE TINTAS FOTOLUMINESCENTES BASEADAS EM LOFS MISTAS APLICADO A CODIFICAÇÃO DE DOCUMENTOS
In this work, the process of synthesis of Metal-Organic Frameworks containing lanthanide ions (LOFs), accelerated via a precipitating agent, capable of accelerating the process of nucleation of MOF crystals, in order to explore the optical properties of this precursor solution (SP_Gd/EU-MOF), as a quick-response photoluminescent material in the coding of off
Quím. Nova. Publicado em: 2020-12
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7. Project and Analysis of Quasi-Periodic PBG for Microstrip Antenna
Abstract In this work the influence of quasi-periodic distributions of air holes with 6, 12 and 6-fold modified symmetries, applied to the substrate of a rectangular microstrip patch antenna are analyzed. To validate the study, parameters such as S11 parameter, bandwidth, total gain, radiation pattern and electric field were investigated through computationa
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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8. Scaling Symmetries and Conservation Laws for Variable-coefficients Nonlinear Dispersive Equations
RESUMO. Simetrias de escala surgem em diferentes ramos da física e abordagens baseadas em simetria são poderosas ferramentas para estudar modelos invariantes por escala, pois podem fornecer leis de conservação que não são óbvias por inspeção. Nessa perspectiva, a classe de equações dispersivas não-lineares com coeficientes variáveis vc K ( m ,
TEMA (São Carlos). Publicado em: 13/12/2019
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9. UNRAVELING THE SOLVATOCHROMISM OF A TRIARYLMETHANE DYE BY RESONANCE RAMAN SPECTROSCOPY
The effect of the solvent on the electronic properties of the triarylmethane dye rosolic acid (RA) is investigated by means of UV-VIS and resonance Raman (RR) spectroscopies. The comparison of the solvatochromic behavior of both neutral and dianionic species of RA in acetonitrile, dimethylsulfoxide, and methanol illustrates the effect of polarity and hydroge
Quím. Nova. Publicado em: 05/12/2019
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10. ESQUARAÍNAS CIS E TRANS SUBSTITUÍDAS: APLICAÇÃO EXPERIMENTAL DA TEORIA DE GRUPO EM ESPECTROSCOPIA VIBRACIONAL
This work shows a practical application of the group theory to a relatively simple molecular system, as well its impact in the results obtained through vibrational spectroscopic techniques. Squaraines substituted by dicyanemethylene groups have been extensively studied, and after minor approaches in the sense to facilitate the point group determination, they
Quím. Nova. Publicado em: 05/12/2019
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11. TITANYL SULPHATE, AN INORGANIC POLYMER: STRUCTURAL STUDIES AND VIBRATIONAL ASSIGNMENT
In this work, anhydrous titanyl sulfate (TiOSO4) was synthesized and characterized by elemental analyses and vibrational spectroscopy by the first time. In order to verify the stability of the crystallographic structure reported in the literature, an optimization calculation of the unit cell geometry was done with the CRYSTAL17 software, and the agreement wi
Quím. Nova. Publicado em: 05/12/2019
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12. Hardening and Dynamic Recovery During Hot Compression Test of Copper Simulated as Viscoplastic Material
The Norton-Bailey equation was used to simulate by finite elements the hardening and dynamic recovery of copper during the hot compression tests. The constants of Norton-Bailey equation were determined from the Voce-Kocks model. The simulation assumes a Mortar Contact with Coulomb friction and axial symmetry. Numerical results were compared with experiments.
Mat. Res.. Publicado em: 05/12/2019