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Search Results: 1 - 10 of 90865 matches for " José Luis; "
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ERP Software Selection Processes: A Case Study inthe Metal Transformation Sector  [PDF]
Antonio Hidalgo, José Albors, Luis Gómez
Intelligent Information Management (IIM) , 2011, DOI: 10.4236/iim.2011.31001
Abstract: When a firm decides to implement ERP softwares, the resulting consequences can pervade all levels, includ- ing organization, process, control and available information. Therefore, the first decision to be made is which ERP solution must be adopted from a wide range of offers and vendors. To this end, this paper describes a methodology based on multi-criteria factors that directly affects the process to help managers make this de- cision. This methodology has been applied to a medium-size company in the Spanish metal transformation sector which is interested in updating its IT capabilities in order to obtain greater control of and better infor- mation about business, thus achieving a competitive advantage. The paper proposes a decision matrix which takes into account all critical factors in ERP selection.
A Study on the Factors That Influence Innovation Activities of Spanish Big Firms  [PDF]
Alvaro Gómez Vieites, José Luis Calvo
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.21002
Abstract: The main goal of this research is to study the role of several factors and firms’ resources that could have had an impact on the development of innovative activities of Spanish big firms, exploring how these factors can help to achieve success through innovation and improving business performance. We propose a new model to analyze the relationships between a set of organizational, technological, financial and information-based resources, as well as other aspects such as company’s cooperation. We employ a Structural Equation Model and the PLS technique in order to validate the theoretical model proposed in this research. The data come from the Spanish National Statistics Institute’s Survey on Firms Technological Innovation. The sample is composed by 2224 observations referred to firms with 200 or more workers. The main results show that human and financial resources and cooperation affect positively R&D activities. At the same time R&D, information management and technological resources have a positive effect on innovation. Finally, R&D activities, innovation results (product and process innovation) and information management influence business results.
Chemoinformatic Approaches for Inhibitors of DNA Methyltransferases: Comprehensive Characterization of Screening Libraries  [PDF]
Jakyung Yoo, José Luis Medina-Franco
Computational Molecular Bioscience (CMB) , 2011, DOI: 10.4236/cmb.2011.11002
Abstract: Virtual screening of compound databases is a promising approach to identify inhibitors of DNA methyltransferases and other epigenetic targets. An important first step before conducting virtual screening is to characterize the structural diversity and chemical space coverage of the screening collections. Herein, we report a comprehensive chemoinformatic characterization of novel screening libraries, including a focused collection directed to inhibitors of DNA methyltransferases (DNMTs), and two natural product databases. The compound databases were assessed in terms of physicochemical properties, molecular scaffolds, and fingerprints. As part of the scaffold diversity analysis, a recently developed method, based on Shannon Entropy, was used. The overall approach enabled the analysis of property space coverage, degree of overlap between collections, scaffold and structural diversity. Overall, the analysis of the distribution of physicochemical properties indicates that the DNMT focused library and the two natural products collections have molecules with properties similar to approved drugs. Moreover, the natural products databases analyzed in this work have different chemical structures from approved drugs and synthetic databases and therefore are attractive for virtual screening for DNMT inhibitors. The scaffold analysis revealed that the focused library has, overall, the largest scaffold diversity and that the most frequent scaffolds are not identified in the other analyzed collections. Therefore, the focused library is also attractive to perform virtual and experimental screening for novel inhibitors. This study represents a first step towards the virtual screening of novel compound databases to identify inhibitors of DNMTs. Results of this study are general and can be used for the virtual screening of the compound databases against targets directed to other therapeutic applications.
Testing for Deterministic Components in Vector Seasonal Time Series  [PDF]
José Luis Gallego, Carlos Díaz
Open Journal of Statistics (OJS) , 2011, DOI: 10.4236/ojs.2011.13017
Abstract: Certain locally optimal tests for deterministic components in vector time series have associated sampling distributions determined by a linear combination of Beta variates. Such distributions are nonstandard and must be tabulated by Monte Carlo simulation. In this paper, we provide closed form expressions for the mean and variance of several multivariate test statistics, moments that can be used to approximate unknown distributions. In particular, we find that the two-moment Inverse Gaussian approximation provides a simple and fast method to compute accurate quantiles and p-values in small and asymptotic samples. To illustrate the scope of this approximation we review some standard tests for deterministic trends and/or seasonal patterns in VARIMA and structural time series models.
Bank Ownership and Efficiency in the New EU Members  [PDF]
Jordi Moreno, José Luis Gallizo, Manuel Salvador
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.31010
Abstract: The aim of this study is to analyze how banking ownership affects banking efficiency in countries which have recently experienced the European integration process more intensely. Using a Bayesian Stochastic Frontier Approach (SFA) applied to panel data, we have estimated efficiency levels in a sample of 226 banks from 12 countries during the period 2000 to 2008. The results show no significant differences between different types of private ownership, questioning the relevance of ownership as a determinant of banking efficiency in these countries. In addition, we have not found any evidence to suggest that foreign ownership is more efficient than its domestic counterpart. These results contradict the popular belief about the higher efficiency levels associated with foreign ownership.
Collaboration in the Cloud for Online Learning Environments: An Experience Applied to Laboratories  [PDF]
Washington Luna, José Luis Castillo Sequera
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.613144
Abstract: Nowadays, Cloud computing has become essential support for online education. Growth and interest in the massive open online courses (MOOCs) hosted on cloud, as well as the large number of students with own device (BYOD) set a favorable scenario for a new model of cooperation and interaction for online education. In this paper we present the results of collaborative work in the cloud, using Google Apps services and MOOCs, in conducting laboratory reports for the subjects of chemistry, and based on this experience we propose an architecture for platforms e-learning and mechanisms for collaborative work in cloud applied to the laboratories.
El potencial bursátil del mercado portugués
José Luis Miralles Marcelo,José Luis Miralles
Universia Business Review , 2008,
Abstract: La reciente inestabilidad de los principales mercados bursátiles europeos ha conducido a los inversores a considerar otros mercados en los que invertir, como los mercados latinoamericanos o aquellos pertenecientes a los países del Este. Sin embargo, existe otra posibilidad mucho más cercana que es la inversión en el mercado portugués ya que ofrece una transparencia y seguridad mayor que la de los mercados emergentes. Además, forma parte de la mayor plataforma bursátil europea (NYSE Euronext) y sus datos macroeconómicos y bursátiles revelan un gran potencial de crecimiento.
Some monogenoidea parasitic on peruvian marine fishes, with description of Anoplocotyloides chorrillensis new species and new records
Luque, José Luis;Iannacone, José;
Memórias do Instituto Oswaldo Cruz , 1991, DOI: 10.1590/S0074-02761991000400008
Abstract: the presence of four monogenoidea parasitic on marine fishes from the central peruvian coast is recorded. one of them, anoplocotyloides chorrillensis (monocotylidae) described from the gills of rhinobatos planiceps (rhinobatidae) is considered a new species. the three other species are: caballerocotyla autralis oliva, 1986 (capsalidae); callorhynchocotyle marplatensis suriano & incorvaia, 1982 (hexabothriidae) and anoplocotyloides papillatus (doran, 1953) (monocotylidae) parasitic on sarda chiliensis chiliensis (scombridae), callorhinchus callorhinchus (callorhinchidae) and rhinobatos planiceps (rhinobatidae) respectively.
On the Moments of Hitting Times for Random Walks on Trees
José Luis Palacios
Journal of Probability and Statistics , 2009, DOI: 10.1155/2009/241539
Abstract: Using classical arguments we derive a formula for the moments of hitting times for an ergodic Markov chain. We apply this formula to the case of simple random walk on trees and show, with an elementary electric argument, that all the moments are natural numbers.
Diversidad y distribución de las magnoliophyta de mexico
Villase?or,José Luis;
Interciencia , 2003,
Abstract: an updated account of the native flowering plants (magnoliophyta) of mexico records 75 orders, 248 families, 2657 genera and 22351 species, plus 2964 sub-specific taxa. such figures place the country among the five floristically richest countries of the world. the use of non-parametric methods for estimating diversity suggests that more than 6500 species may still be added to the flora of mexico; thus, its real floristic richness should be of about 29000 species. the floristic richness known for each of the 32 mexican states is examined. likewise, a list of the 248 families, indicating their number of genera and species in the country is provided; 81 of them are represented only by one genera and 29 only by one species. none of the mexican states shows an exceptional floristic richness; on the contrary, they are placed according to the normal richness parameters one should expect based solely on its area. it is concluded that the outstanding floristic richness found in mexico results from a high beta diversity, due to the large environmental heterogeneity found in almost all the country.
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