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Now showing items 21-40 of 298
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Antiproliferative and structure activity relationships of amaryllidaceae alkaloids
(MDPI, 2015-07-30)Acceso abiertoThe antiproliferative activity of a set of seven natural Amaryllidaceae alkaloids and 32 derivatives against four cancer cell lines (A2780, SW1573, T47-D and WiDr) was determined. The best antiproliferative activities were ... -
Thermoelastic behavior of advanced composite sandwich plates by using a new 6 unknown quasi-3D hybrid type HSDT
(Elsevier, 2015-08)Acceso abiertoThis paper presents an analytical solution for the thermoelastic bending analysis of advanced composite sandwich plates by using a new quasi-3D hybrid type HSDT with 6 unknowns which is based on a generalized formulation. ... -
Five-unknowns generalized hybrid-type quasi-3D HSDT for advanced composite plates
(Elsevier, 2015-09-15)Acceso abiertoAbstract -
Free vibration of single and sandwich laminated composite plates by using a simplified FSDT
(Elsevier, 2015-11)Acceso abiertoThis paper presents a simplified first order shear deformation theory (FSDT) for laminated composite and sandwich plates. Unlike the existing FSDT, the present one has a novel displacement field which include undetermined ... -
Refined and generalized hybrid type quasi-3D shear deformation theory for the bending analysis of functionally graded shells
(Elsevier, 2015-12)Acceso abiertoThe 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 ... -
A simple and accurate generalized shear deformation theory for beams
(Elsevier, 2015-12)Acceso abiertoThis 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 ... -
Assessment of Ichu fibers as non-expensive thermal insulation system for the Andean regions
(Elsevier, 2015-12-01)Acceso abiertoIn the Andean regions, low temperatures (5 to −25 °C) combined with the wind effect give the sensation of extreme cold. Besides, in the rural areas, dwelling structures are very rudimentary, being based on adobe walls and ... -
Managing warehouse efficiency and worker discomfort through enhanced storage assignment decisions
(Taylor and Francis Group, 2016-04-06)Acceso abiertoHumans are at the heart of crucial processes in warehouses. Besides the common economic goal of minimising cycle times, we therefore add in this paper the human well-being goal of minimising workers’ discomfort in the ... -
A computational methodology to calculate the required power in disc crushers
(Oxford University Press, 2016-09-15)Acceso abiertoThis study aims to contribute to the estimation of power consumption in a disintegration process in disc crushers (fixed and mobile). The study covers the dynamic analysis of forces acting on the particles and the mobile ... -
Micompr: An r package for multivariate independent comparison of observations
(The R Foundation for Statistical Computing, 2016-11-21)Acceso abiertoThe R package micompr implements a procedure for assessing if two or more multivariate samples are drawn from the same distribution. The procedure uses principal component analysis to convert multivariate observations into ... -
Estimation of the power consumed in disc crushers using a static analysis
(Czech Academy of Agricultural Sciences, 2017)Acceso abiertoThe classic forms of disc crusher disintegration simulations are faced using methods that associate their analysis to the stochastic nature of the process. This paper introduces a method that can solve the disc crusher ... -
A boundary-discontinuous-displacement based Fourier analysis of thick laminated beams via a robust 1D-CUF model
(Elsevier, 2017-04-17)Acceso abiertoThis paper presents an analytical solution for the static analysis of thick laminated rectangular beams with clamped boundary conditions at either or both of the beam's edges. A unified formulation known as Carrera's Unified ... -
Boundary discontinuous Fourier analysis of thick beams with clamped and simply supported edges via CUF
(Chinese Journal of Aeronautics, 2017-07-11)Acceso abiertoThis paper presents an analytical solution for static analysis of thick rectangular beams with different boundary conditions. Carrera's Unified Formulation (CUF) is used in order to consider shear deformation theories of ... -
Scheduling the scheduling task: a time-management perspective on scheduling
(Springer, 2017-10-28)Acceso abiertoThe objective of this study was to characterize how schedulers spend their time interacting with external parties. Time is the most critical resource at the disposal of schedulers; however, its usage has been overlooked ... -
Extreme salinity as a challenge to grow potatoes under Mars-like soil conditions: targeting promising genotypes
(Cambridge University Press, 2017-11-16)Acceso abiertoOne of the future challenges to produce food in a Mars environment will be the optimization of resources through the potential use of the Martian substratum for growing crops as a part of bioregenerative food systems. In ... -
Diseño, fabricación e implementación de un dispositivo robótico basado en actuadores blandos para rehabilitación de la mano
(Universidad de Ingeniería y Tecnología, 2018)Acceso abiertoEl siguiente trabajo comprende el diseño, fabricación e implementación de un dispositivo para rehabilitación de mano hemipléjica basado en actuadores blandos. El dispositivo está compuesto por una férula de material plástico ... -
Optimización de los parámetros geométricos de una lavadora de quinua, usando el método de PIV
(Universidad de Ingeniería y Tecnología, 2018)Acceso abiertoLa presente tesis se realizó con el objetivo de optimizar los parámetros que influyen en el proceso de lavado de los granos de quinua. Para tal fin, se diseñó un prototipo de lavadora de quinua en base a un tambor giratorio ... -
Simulaciones del proceso de limpieza de la máquina aerodinámica limpiadora de trigo mediante acoples DEM-CFD
(Universidad de Ingeniería y Tecnología, 2018)Acceso abiertoExiste una falta de estudios fundamentales por el estado del arte numérico computacional y sus aplicaciones en la ingeniería moderna; como es el caso de las simulaciones acopladas entre de DEM “método de elementos discretos” ... -
Sistema de respaldo energético basado en pilas de combustible para hospitales
(Universidad de Ingeniería y Tecnología, 2018)Acceso abiertoEn el presente proyecto de tesis se desarrolla la ingeniería conceptual de un sistema energético de respaldo eléctrico para un hospital. Este sistema energético emplea pilas de combustible accionados con hidrógeno procedente ... -
Análisis estático de cascarones mediante métodos analíticos
(Universidad de Ingeniería y Tecnología, 2018)Acceso abiertoLa ingeniería se encuentra avanzando en distintos tipos de estructuras en especial las secciones curvadas. Cada vez es más frecuente el uso de materiales diferentes a los clásicos metales, a fin de reducir el peso de ciertas ...