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Mostrando 1-12 de 3605 artigos, teses e dissertações.
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1. Symptoms of depression (not anxiety) mediate the relationship between childhood sexual abuse and compulsive sexual behaviors in men
Objective: Childhood sexual abuse is associated with compulsive sexual behavior, depression, and anxiety in men. Furthermore, both depression and anxiety have been linked to compulsive sexual behaviors. However, whether anxiety and depression mediate the relationship between childhood sexual abuse and compulsive sexual behaviors has yet to be tested. We inve
Brazilian Journal of Psychiatry. Publicado em: 2023
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2. MGF Methods for Fixed and Gain Saturated Optically Preamplified FSO Links Impaired by Misalignments and Atmospheric Turbulence
Abstract The Gaussian approximation is commonly used to evaluate the performance of free space optical communication systems. However, other performance evaluation methods such as the saddle point approximation, Chernoff bound and the modified Chernoff bound have also been used. This paper investigates the performance of fixed and gain saturated optically pr
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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3. An A Posteriori Error Estimator for a Non Homogeneous Dirichlet Problem Considering a Dual Mixed Formulation
ABSTRACT In this paper, we describe an a posteriori error analysis for a conforming dual mixed scheme of the Poisson problem with non homogeneous Dirichlet boundary condition. As a result, we obtain an a posteriori error estimator, which is proven to be reliable and locally efficient with respect to the usual norm on H d i v ; Ω × L 2 Ω. We remark t
Trends in Computational and Applied Mathematics. Publicado em: 2022
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4. Semi-analytical Equations for Designing Terahertz Graphene Dipole Antennas on Glass Substrate
Abstract Semi-analytical equations are developed for aiding the process of designing terahertz graphene-based rectangular dipole antennas lying on glass substrates. It directly provides the dipole length required for obtaining resonance at a desired frequency since antenna width and graphene chemical potential are known. By using the finite-difference time-d
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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5. FUZZY MODELING OF THE EFFECT OF IRRIGATION DEPTHS ON BEET CULTIVARS
ABSTRACT The objective of this study was to develop a Fuzzy Rule-Based System (FRBS) for the mathematically modeling of the irrigation level effect on beet cultivars ( Beta vulgaris L.). From an agronomic experiment carried out in a protected environment (greenhouse), it was defined as input variables, for each cultivar, the irrigation levels (depths of 25,
Engenharia Agrícola. Publicado em: 2022
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6. Salivary Cortisol and Sustained Auditory Attention in Children with and without Cleft Lip and Palate
Abstract Introduction Cortisol is a hormone involved in the response to stress. Attention is a function that can change due to exposure to stress. Objectives To verify the correlation between the level of salivary cortisol and sustained auditory attention in children with cleft lip and palate, as well as to compare the results of the variables analyzed bet
International Archives of Otorhinolaryngology. Publicado em: 2022
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7. FUZZY MODELING FOR RAPID COOLING OF TABLE GRAPES IN DIFFERENT PLASTIC FILM BAGS
ABSTRACT Rapid cooling is necessary to remove heat from fruit; however, it directly affects the water loss of grapes under certain conditions. Fuzzy logic is an important theory for analyzing results as it simplifies the assimilation of the phenomena through refined adjustments, allowing the prediction of the weight loss of fruits in relation to rapid coolin
Engenharia Agrícola. Publicado em: 2022
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8. Estimation and Mapping of the Received Power Level of Digital Signals TV Using Spatial Interpolation Methods
Abstract The signal digitization process of the open television system is still in progress, therefore, the study of the digital signal propagation has great importance so that broadcasters can develop and improve the transmission service. The field measurement of digital signal parameters is one of the most reliable means to analyze the signal propagation i
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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9. Preliminary Study of the Applicability of Software in the Investigation of Sustained Auditory Attention
Abstract Introduction The use of auditory behavioral tests, which specifically assess sustained attention, is necessary, due to its relationship with learning, language production, cognitive development and school performance. Objective To evaluate how children performed using software developed to investigate the ability of sustained auditory attention, a
International Archives of Otorhinolaryngology. Publicado em: 2022
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10. Response Factor in GC-FID Methyl Ester Analysis in Several Biodiesels: A Comparative Study of the EN 14103:2011 and ABNT 15764:2015 Methods versus a Proposed GC-FID Procedure for Individual Ester Determination
A gas chromatography method with a flame ionization detector enabled by relative response factor was developed to determine the individual and the total content of esters in biodiesel. This method accounts for different response factors of the detector for a homologous series of esters that may be present in biodiesel. In this way, the determination of the t
Journal of the Brazilian Chemical Society. Publicado em: 2022
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11. A Simple, Rapid, and Reliable Titrimetric Method for the Determination of Glycerol at Low Concentration
Glycerol can be determined in several products by various analytical techniques. Titrimetric ones have stood out for their low cost, being recommended as standards. However, reliable, simple, fast, and green methods with low quantification limits are still needed. Titration of glycerol is based on its oxidation by periodate (Malaprade reaction) producing for
Journal of the Brazilian Chemical Society. Publicado em: 2022
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12. Allometric models for estimating the leaf area of lisianthus (Eustoma grandiflorum) using a non-destructive method
ABSTRACT Lisianthus (Eustoma grandiflorum) is a cut flower grown due to the wide diversity of colors and longevity in the post-harvest. The leaf area measurement is fundamental in plants because the leaves are directly related to several processes such as transpiration, radiation interception and CO2 fixation that enable the plant to grow. The objective of t
Revista Ceres. Publicado em: 2022