Buscar
Mostrando ítems 1-10 de 1761
A simple three step method for selective placement of organic groups in mesoporous silica thin films
(Elsevier Science Sa, 2016-02)
Selective functionalization of mesoporous silica thin films was achieved using a three step method. The first step consists in an outer surface functionalization, followed by washing off the structuring agent (second step), ...
Site-Specific Product Selectivity of Stepped Pt Surfaces for Methane Dehydrogenation
(American Chemical Society, 2020-09)
Through density functional theory (DFT) calculations, we show that, in contrast to terrace sites of Pt(211) and Pt(111), on steplike sites of Pt(211) and Pt(110)-(2 × 1), methylene is more stable than methyl. The resulting ...
Spatiotemporal dynamics of conspecific movement explain a solitary carnivore's space use
(Wiley-Blackwell, 2019-05-01)
Patterns of space use by an individual emerge as a result of their movements, and their decisions of when and where to move are related to the distribution of resources needed for their survival and reproduction. Solitary ...
A Multi-step Process Approach for Estimating Public Sector Wages. The Spanish Experience
We propose a semiparametric model including problems of sample selection and endogeneity. Concretely, we focus on studying the effect of tenure in public sector wages. Here we face two problems: Public wages are only ...
Unraveling the selectivity patterns in phosphine-catalyzed annulations of azomethine imines and allenoates
(American Chemical Society, 2020)
The mechanism and selectivity of phosphine-catalyzed [3 + 2] and [3 + 3] annulations of azomethine imines and allenoates have been computationally studied. Exploration of the potential energy surface reveals that the ...
Optimal selection and location of fixed-step capacitor banks in distribution networks using a discrete version of the vortex search algorithm
(Cartagena de Indias, 2020-09-19)
This paper deals with the problem of the optimal selection of capacitor banks in electrical AC distribution systems for minimizing the costs of energy losses during a year of operation through a discrete version of the ...
The effect of muscle fatigue on the last stride before stepping down a curb
(2013-04-01)
The stride before landing may be important during stepping down. The aim of this study was to analyze variability of the kinematics and muscle activity in the final stride before stepping down a curb, with and without ankle ...
The effect of muscle fatigue on the last stride before stepping down a curb
(2013-04-01)
The stride before landing may be important during stepping down. The aim of this study was to analyze variability of the kinematics and muscle activity in the final stride before stepping down a curb, with and without ankle ...
The effect of the H -1 scaling factors τ and ω on the structure of H in the single-step procedure
(BioMed Central, 2018-04)
Background: The single-step covariance matrix H combines the pedigree-based relationship matrix A with the more accurate information on realized relatedness of genotyped individuals represented by the genomic relationship ...
Binary flower pollination algorithm and its application to feature selection
(2015-01-01)
The problem of feature selection has been paramount in the last years, since it can be as important as the classification step itself. The main goal of feature selection is to find out the subset of features that optimize ...