Energy Constraints
Mostrando 1-12 de 146 artigos, teses e dissertações.
-
1. UVB irradiation differential regulate miRNAs expression in skin photoaging
Abstract Background: UVB irradiation can cause acute damage such as sunburn, or photoaging and melanoma, all of which are major health threats. Objective: This study was designed to investigate the mechanism of skin photoaging induced by UVB radiation in mice through the analysis of the differential expression of miRNAs. Methods: A UVB irradiation photoag
Anais Brasileiros de Dermatologia. Publicado em: 2022
-
2. Estudio y caracterización del efecto de compuestos con titanio sobre el sistema hidruro Li-B-Mg-H con alta capacidad de almacenamiento de hidrógeno
ABSTRACT One of the main constraints for the implementation of hydrogen as energy carrier is the lack of an efficient and safe hydrogen storage system. Hydrogen storage in solid state through hydride compounds formation is a potential alternative to address this problem. In this work, it is studied the effect of different titanium based compounds (TiB2, LixT
Matéria (Rio J.). Publicado em: 19/07/2018
-
3. Mass and buckling criterion optimization of stiffened carbon/epoxy composite cylinder under external hydrostatic pressure
Abstract In this manuscript, stiffened carbon / epoxy composite cylinders under external hydrostatic pressure will be examined to minimize mass and maximize buckling pressure. The new approach proposed in this paper is single objective optimization of stiffened composite cylindrical shell under external pressure by genetic algorithm (GA) in order to obtain
Lat. Am. j. solids struct.. Publicado em: 23/04/2018
-
4. Estimation of Kinetic Parameters During the Treatment of Steelmaking Slag Expansibility Data
Steelmaking slag (SS) is one of the largest generation waste in the integrated and semi-integrated plants, but it has application restrictions due to its high expansibility. To overcome these constraints, this research had as its main objective the reactions is kinetics parameters estimation that result in the expansion of SS using the Arrhenius global equat
Mat. Res.. Publicado em: 08/01/2018
-
5. Impact Damage Analysis with Stress Continuity Constraints Fulfilment at Damaged-Undamaged Regions and at Layer Interfaces
Abstract Low-velocity impacts have a relevant importance for safety of laminated and sandwich composite structures, because they are highly susceptible to damage. In this paper, a 3D cost effective zig-zag model is developed in order to efficiently simulate such impacts. It a priori fulfills the continuity of out-of-plane stresses at layer interfaces, the co
Lat. Am. j. solids struct.. Publicado em: 2017-08
-
6. Entropy Generation Minimization Analysis of Active Magnetic Regenerators
Abstract A performance assessment of active magnetocaloric regenerators using entropy generation minimization is presented. The model consists of the Brinkman-Forchheimer equation to describe the fluid flow and coupled energy equations for the fluid and solid phases. Entropy generation contributions due to axial heat conduction, fluid friction and interstiti
An. Acad. Bras. Ciênc.. Publicado em: 2017-05
-
7. Secondary structure of nrDNA Internal Transcribed Spacers as a useful tool to align highly divergent species in phylogenetic studies
Abstract Recently, it has been suggested that internal transcribed spacer (ITS) sequences are under selective constraints to preserve their secondary structure. Here, we investigate the patterns of the ITS nucleotide and secondary structure conservation across the Passiflora L. genus to evaluate the potential use of secondary structure data as a helpful tool
Genet. Mol. Biol.. Publicado em: 13/02/2017
-
8. Structure Comparison and Optimal Design of 6-RUS Parallel Manipulator Based on Kinematic and Dynamic Performances
Abstract The effects of distinctive parameters such as revolute joint angle or spherical joint location of mobile platform in a 6-DOF 6-RUS parallel manipulators on workspace, kinematic, and dynamic indices are investigated in this study to select proper structure commensurate with performance. Intelligent multi-objective optimization method is used to desig
Lat. Am. j. solids struct.. Publicado em: 2016-12
-
9. Staphylococcus xylosus fermentation of pork fatty waste: raw material for biodiesel production
ABSTRACT The need for cleaner sources of energy has stirred research into utilising alternate fuel sources with favourable emission and sustainability such as biodiesel. However, there are technical constraints that hinder the widespread use of some of the low cost raw materials such as pork fatty wastes. Currently available technology permits the use of lip
Braz. J. Microbiol.. Publicado em: 2016-09
-
10. El profesor como catalizador de energía emocional frente a la ambivalencia del nuevo entorno tecno-educativo
Abstract In this paper, I aim to achieve two complementary objectives. Firstly, to show the constitutive constraints to the theoretical and empirical studies which analyze the causal links between technology and education. I seek to evidence that such endeavor lacks a happy ending due to its own endogenous limitations. Secondly, I aim to evidence that, beyon
Educ. Pesqui.. Publicado em: 17/05/2016
-
11. State estimation of chemical engineering systems tending to multiple solutions
A well-evaluated state covariance matrix avoids error propagation due to divergence issues and, thereby, it is crucial for a successful state estimator design. In this paper we investigate the performance of the state covariance matrices used in three unconstrained Extended Kalman Filter (EKF) formulations and one constrained EKF formulation (CEKF). As bench
Braz. J. Chem. Eng.. Publicado em: 2014-09
-
12. Hydrogen production by alkaline water electrolysis
Water electrolysis is one of the simplest methods used for hydrogen production. It has the advantage of being able to produce hydrogen using only renewable energy. To expand the use of water electrolysis, it is mandatory to reduce energy consumption, cost, and maintenance of current electrolyzers, and, on the other hand, to increase their efficiency, durabil
Quím. Nova. Publicado em: 2013