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comparative analytic » comparative analysis (Expander búsqueda), competitive analysis (Expander búsqueda), comparative anatomy (Expander búsqueda)
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1
artículo
The purpose of this paper is to study the vibrational behavior of advanced composite plates by using a novel first shear deformation theory (FSDT). This theory contains only four unknowns, with is even less than the classical FSDT. The governing equations are derived by employing the Hamilton's principles and solved via Navier's solution. The present results were validiated by comparing it with the 3D, classical FSDT and other solutions available in the literature. Shear correction factor apper to be unfovarable in some cases (case dependent). Finally, authors recommend further study of this new manner to model the displacement field.
2
artículo
Publicado 2015
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The closed-form solution of a generalized hybrid type quasi-3D higher order shear deformation theory (HSDT) for the bending analysis of functionally graded shells is presented. From the generalized quasi-3D HSDT (which involves the shear strain functions “f(ζ)” and “g(ζ)” and therefore their parameters to be selected “m” and “n”, respectively), infinite six unknowns' hybrid shear deformation theories with thickness stretching effect included, can be derived and solved in a closed-from. The generalized governing equations are also “m” and “n” parameter dependent. Navier-type closed-form solution is obtained for functionally graded shells subjected to transverse load for simply supported boundary conditions. Numerical results of new optimized hybrid type quasi-3D HSDTs are compared with the first order shear deformation theory (FSDT), and other quasi-3D HSDTs. The...
3
objeto de conferencia
Publicado 2022
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The paper presents the concept of a system for the intellectual digital e-univer-sity of the future (IDEUF) based on an integrated database that ensures the correct function of the whole university system. Particular attention is paid to the process of checking students’ required and current level of acquired knowledge, which is considered one of the main parts of the educational process. The article provides a detailed comparative analysis of actual testing systems and presents a proper testing system model within the IDEUF framework. The proposed system considers the testing principles, scales, and technologies for test building and preparing educational materials
4
tesis de maestría
Publicado 2016
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Natural vibrissae fulfill a lot of functions. Next to object distance detection and object shape recognition, the surface texture can be determined. Inspired by the natural process of surface texture detection, the goal is to adapt it by technical concepts. Modeling the vibrissa as an EulerBernoulli bending beam and the vibrissa-surface contact with respect to Coulomb's Law of Friction, the first approach is formed by the group of Steigenberger and Behn. Due to the surface contact, the vibrissa gets deformed. Initiating a linear movement of the beam support in the way that the bearn tip gets pushed, first the beam tip is sticking to the surface. The acting friction force prevents a movement of the beam tip until the static friction coeflicient is reached. The displacement of the support corresponds to changes in the acting forces and moment. Out of these changes the coeflicient of stat...
5
tesis de maestría
Publicado 2016
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Natural vibrissae fulfill a lot of functions. Next to object distance detection and object shape recognition, the surface texture can be determined. Inspired by the natural process of surface texture detection, the goal is to adapt it by technical concepts. Modeling the vibrissa as an EulerBernoulli bending beam and the vibrissa-surface contact with respect to Coulomb's Law of Friction, the first approach is formed by the group of Steigenberger and Behn. Due to the surface contact, the vibrissa gets deformed. Initiating a linear movement of the beam support in the way that the bearn tip gets pushed, first the beam tip is sticking to the surface. The acting friction force prevents a movement of the beam tip until the static friction coeflicient is reached. The displacement of the support corresponds to changes in the acting forces and moment. Out of these changes the coeflicient of stat...
6
artículo
Publicado 2021
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This article seeks to analyze the function of the International Criminal Court (ICC) from the analytical horizon of critical studies and the particular contributions of the Helsinki School and social idealism. To achieve this objective, the main postulates of both perspectives are compared towards the concept of international criminal justice (ICJ), in general, and towards the performance of the ICC in its time of validity, in particular. The methodology used is that of a documentary analysis with a strong inclination towards texts of a theoretical, doctrinal and jurisprudential nature.
7
artículo
Publicado 2021
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This article seeks to analyze the function of the International Criminal Court (ICC) from the analytical horizon of critical studies and the particular contributions of the Helsinki School and social idealism. To achieve this objective, the main postulates of both perspectives are compared towards the concept of international criminal justice (ICJ), in general, and towards the performance of the ICC in its time of validity, in particular. The methodology used is that of a documentary analysis with a strong inclination towards texts of a theoretical, doctrinal and jurisprudential nature.
8
artículo
Publicado 2016
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This paper presents a static analysis of functionally graded single and sandwich beams by using an efficient 7DOFs quasi-3D hybrid type theory. The governing equations are derived by employing the principle of virtual works in a weak form and solved by means of the Finite Element Method (FEM). A C1 cubic Hermite interpolation is used for the vertical deflection variables while C0 linear interpolation is employed for the other kinematics variables. Convergence rates are studied in order to validate the finite element technique. Numerical results of the present formulation are compared with analytical and FEM solutions available in the literature.
9
artículo
Publicado 2021
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Objective: To compare the professional performance of the health establishments with essential obstetric and neonatal functions from Lima with respect provincie during September-October of 2015. Materials and methods: It´s a cross- sectional analytical investigation conducted in 350 health establishments with essential obstetric-neonatal functions I-II (FONE I-II) database based on national surveys conducted by the National Institute of Statistics and Informatics (INEI) during 2015. New variables were created from the databases to determinate the gynecology staff´s professional performance and analyzed the data with the R statistical software and the IBM SPSS Statistics 25 using the chi-square test. Results: The investigation showed that midwifes were the healthl staff who most frequently attended vaginal births, both in Lima (62.9%) and in provinces (91.4%). With respect to the partog...
10
artículo
Publicado 2021
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Objective: To compare the professional performance of the health establishments with essential obstetric and neonatal functions from Lima with respect provincie during September-October of 2015. Materials and methods: It´s a cross- sectional analytical investigation conducted in 350 health establishments with essential obstetric-neonatal functions I-II (FONE I-II) database based on national surveys conducted by the National Institute of Statistics and Informatics (INEI) during 2015. New variables were created from the databases to determinate the gynecology staff´s professional performance and analyzed the data with the R statistical software and the IBM SPSS Statistics 25 using the chi-square test. Results: The investigation showed that midwifes were the healthl staff who most frequently attended vaginal births, both in Lima (62.9%) and in provinces (91.4%). With respect to the partog...
11
artículo
Publicado 2020
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In this paper, a three-dimensional numerical solution for the bending study of laminated composite doubly-curved shells is presented. The partial differential equations are solved analytically by the Navier summation for the midsurface variables; this method is only valid for shells with constant curvature where boundary conditions are considered simply supported. The partial differential equations present different coefficients, which depend on the thickness coordinates. A semi-analytical solution and the so-called Differential Quadrature Method are used to calculate an approximated derivative of a certain function by a weighted summation of the function evaluated in a certain grin domain. Each layer is discretized by a grid point distribution such as: Chebyshev-Gauss-Lobatto, Legendre, Ding and Uniform. As part of the formulation, the inter-laminar continuity conditions of displacement...
12
artículo
Publicado 2020
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
13
artículo
Publicado 2024
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Objective: To determine the association between frailty syndrome and family functioning among older adults with diabetic retinopathy. Materials and methods: An analytical and cross-sectional study conducted among patients diagnosed with diabetic retinopathy. The ophthalmology department diagnosed diabetic retinopathy through pupil dilation, using tetracaine and an ophthalmoscope. Three groups were determined using the FRAIL questionnaire: frail, prefrail and nonfrail; the sample sizes were 39, 64 and 76, respectively, matched by age. The study variables included age, sex, education, marital status and occupation. Additionally, the time since the diagnosis of diabetic retinopathy was measured. Furthermore, the type of family was determined according to Huerta’s classification, which identifies nuclear family, extended family, composite extended family, single-parent family and blended f...
14
artículo
Publicado 2019
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We present two modalities of third generation contextual therapies in their group therapy format applied to groups of people with diverse transdiagnostic problems in a public context of attention to mental health. In both groups of therapies an intervention design of 12 sessions with experiential exercises during 3 months is used. The results of this study indicate that both group modalities are effective in reducing experiential avoidance along with other aspects, a reduction that does not occur when the results are compared with those in the individual therapy control group. The results propose a promising path for the application of group contextual therapies in public contexts.
15
artículo
Publicado 2019
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We present two modalities of third generation contextual therapies in their group therapy format applied to groups of people with diverse transdiagnostic problems in a public context of attention to mental health. In both groups of therapies an intervention design of 12 sessions with experiential exercises during 3 months is used. The results of this study indicate that both group modalities are effective in reducing experiential avoidance along with other aspects, a reduction that does not occur when the results are compared with those in the individual therapy control group. The results propose a promising path for the application of group contextual therapies in public contexts.
16
artículo
This paper presents a static analysis of functionally graded (FG) single and sandwich beams by using a simple and efficient 4-unknown quasi-3D hybrid type theory, which includes both shear deformation and thickness stretching effects. The governing equations and boundary conditions are derived by employing the principle of virtual works. Navier-type closed-form solution is obtained for several beams. New hybrid type shear strain shape functions for the inplane and transverse displacement were introduced in general manner to model the displacement field of beams. Numerical results of the present compact quasi-3D theory are compared with other quasi-3D higher order shear deformation theories (HSDTs).
17
artículo
Publicado 2023
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Objective: To compare two reconstructive surgery techniques for lower limb injury with exposed bone and demonstratethat the VAC® (vacuum-assisted closure) negative pressure wound therapy is an alternative for potential recovery showingno significant changes that could lead to functional compromise. Materials and methods: An analytical, prospective, quantitative and longitudinal study conducted with all the patientsof Clínica Stella Maris with traumatic injuries of the lower limb and exposure of the middle third of the tibia treated withthe VAC® system and the medial calf flap in 2019. Results: The measurement obtained with the functional ambulation categories (FAC) scale showed better resultsamong the patients treated with the VAC® technique (since 50 % got grade V) than those who underwent the flaptechnique (50 % got grade IV), being the differences statistically significant (p <...
18
artículo
Publicado 2020
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ABSTRACT Introduction Although the absence of memory impairment was considered among the diagnostic criteria to differentiate Alzheimer's disease (AD) from Behavioural Variant of Frontotemporal Dementia (bvFTD), current and growing evidence indicates that a significant percentage of cases of bvFTD present with episodic memory deficits. In order to compare the performance profile of the naming capacity and episodic memory in patients with AD and bvFTD the present study was designed. Methods Cross-sectional and analytical study with control group (32 people). The study included 42 people with probable AD and 22 with probable bvFTD, all over 60 years old. Uniform Data Set instruments validated in Spanish were used: Multilingual Naming Test (MINT), Craft-21 history and Benson's complex figure, among others. Results: A higher average age was observed among the patients with AD. The naming cap...
19
objeto de conferencia
Publicado 2020
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RESUMEN Debido a la limitada cantidad de reservas de petróleo, es fundamental garantizar el uso eficiente de la energía disponible, lo cual está íntimamente ligado al diseño óptimo de los equipos eléctricos. Estos equipos (por funcionar con energía eléctrica) no pueden evitar tener fuentes discretas de generación de calor y su diseño depende de la determinación precisa del campo de temperaturas en todo el cuerpo. En este trabajo se utiliza el método integral de las funciones de Green para determinar la distribución de temperaturas tridimensional de un medio homogéneo debido a una fuente de generación de calor con forma de onda rectangular. La geometría de la generación de calor ha sido seleccionada de tal manera que tenga la forma típica de los calentadores eléctricos flexibles que se encuentran comercialmente disponibles. La solución obtenida es exacta y matemática...
20
artículo
Publicado 2018
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This paper presents Best Theory Diagrams (BTDs) constructed from various non-polynomial theories for the static analysis of thick and thin symmetric and asymmetric cross-ply laminated plates. The BTD is a curve that provides the minimum number of unknown variables necessary for a fixed error or vice versa. The plate theories that belong to the BTD have been obtained by means of the Axiomatic/Asymptotic Method (AAM). The different plate theories reported are implemented by using the Carrera Unified Formulation (CUF). Navier-type solutions have been obtained for the case of simply- supported plates loaded by a bisinuisoidal transverse pressure with different length-to-thickness ratios. The BTDs built from non-polynomials functions are compared with BTDs using Maclaurin expansion. The results suggest that the plate models obtained from the BTD using non-polynomial terms can improve the accu...
