Investigaciones: Envíos recientes
Mostrando ítems 1381-1400 de 1422
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Two-dimensional Einstein manifolds in geometrothermodynamics
(2013)We present a class of thermodynamic systems with constant thermodynamic curvature which, within the context of geometric approaches of thermodynamics, can be interpreted as constant thermodynamic interaction among their ... -
Mitochondrial DNA analysis suggests a chibchan migration into Colombia
(Pontificia Universidad Javeriana, 2015)The characterization of mitochondrial DNA (mtDNA) allows the establishment of genetic structures and phylogenetic relationships in human populations, tracing lineages far back in time. We analysed samples of mtDNA from ... -
Chirp-wave expansion of the electron wavefunctions in atoms
(2014)The description of the electron wavefunctions in atoms is generalized to the fractional Fourier series. This method introduces a continuous and infinite number of chirp basis sets with linear variation of the frequency to ... -
Exact relativistic magnetized haloes around rotating disks
(Hindawi Publishing Corporation, 2015)The study of the dynamics of magnetic fields in galaxies is one of important problems in formation and evolution of galaxies. In this paper, we present the exact relativistic treatment of a rotating disk surrounded by a ... -
Overlap and diversity in antimicrobial peptide databases: Compiling a non-redundant set of sequences
(Oxford University Press, 2015)Motivation: The large variety of antimicrobial peptide (AMP) databases developed to date are characterized by a substantial overlap of data and similarity of sequences. Our goals are to analyze the levels of redundancy for ... -
The emergence of cognitive short-term planning: Performance of preschoolers in a problem-solving task
(Universidad Catolica de Colombia, 2015)The aim of this study is to identify patterns of the cognitive planning process of young children emerging in the context of a problem solving task. Using a complex dynamic systems approach, this paper depicts the main ... -
Volatile organic compounds in the atmosphere of Mexico City
(Elsevier Ltd, 2015)The Mexico City Metropolitan Area (MCMA) is one of the most polluted megacities in North America. Therefore, it is an excellent benchmark city to understand atmospheric chemistry and to implement pilot countermeasures. Air ... -
Tuboerculosis in Barranquilla, 1930-1960
(Universidad del Norte, 2015)This article analyzes the role of tuberculosis in the city of Barranquilla between 1930 and 1960. It demonstrates how it became into an endemic disease due to the increment of morbidity and mortality that attract the ... -
Methodology of Machine Learning for the classification and Prediction of users in Virtual Education Environments
(Centro de Informacion Tecnologica, 2019)A methodology to classify and predict users in virtual education environments, studying the interaction of students with the platform and their performance in exams is proposed. For this, the machine learning tools, main ... -
In silico antibacterial activity modeling based on the TOMOCOMD-CARDD approach
(Sociedade Brasileira de Quimica, 2015)In the recent times, the race to cope with the increasing multidrug resistance of pathogenic bacteria has lost much of its momentum and health professionals are grasping for solutions to deal with the unprecedented resistance ... -
Community participation and communication processes in the implementation of programs of resettlement of families within the context of urban development in the city of barranquilla (Colombia)
(Universidad del Norte, 2016)Planning processes of development and growth of the city of Barranquilla have required the relocation of the population living in areas of intervention actions. As part of the implementation of the New Management Plan ... -
Work conditions assessment in manufacturing organizations in the colombian caribbean region
(Universidad de Antioquia, 2016)Deficient work conditions have been linked with an epidemic of injury and illness in low and middle-income countries. A group of 22 companies from different sectors was selected in order to carry out a diagnosis related ... -
Estimate of induced stress during filling and discharge of metallic silos for cement storage
(Universidad Nacional de Colombia, 2015)The present article show the structural analysis realized to metallic silo for storage cement through of the parametric model development in the finite element software ASNYS APDL, the fill and discharge pressures applied ... -
Effective Perihelion Advance and Potentials in a Conformastatic Background with Magnetic Field
(Hindawi Limited, 2016)Exact solutions of the Einstein-Maxwell field equations for a conformastatic metric with magnetized sources are investigated. In this context, effective potentials are studied in order to understand the dynamics of the ... -
Physico-Chemical and structural interpretation of discrete derivative indices on N-tuples atoms
(MDPI AG, 2016)This report examines the interpretation of the Graph Derivative Indices (GDIs) from three different perspectives (i.e., in structural, steric and electronic terms). It is found that the individual vertex frequencies may ... -
A submersible printed sensor based on a monopole-coupled split ring resonator for permittivity characterization
(MDPI AG, 2019)This work presents a non-invasive, reusable and submersible permittivity sensor that uses a microwave technique for the dielectric characterization of liquid materials. The proposed device consists of a compact split ring ... -
Programmable diffractive optical elements with applicability in ophthalmic optics
(Sociedad Espanola de Optica, 2017)This paper presents results of the research related with the development of the doctoral thesis of Lenny Alexandra Romero Pérez. This work covers the design, the characterization and the analysis of several programmable ... -
Strategic direction: Projection of technological innovation and administrative management in small enterprises
(Centro de Informacion Tecnologica, 2017)The main objective of this research is to establish the level of innovation in technology and strategic direction of small and medium size enterprises (SMEs) in the city of Barranquilla, Colombia. For this purpose, a ... -
Retinal image analysis: Image processing and feature extraction oriented to the clinical task
(Sociedad Espanola de Optica, 2017)Medical digital imaging has become a key element of modern health care procedures. It provides visual documentation and a permanent record for the patients, and most important the ability to extract quantitative information ... -
Inventory Management Methodology to determine the levels of integration and collaboration in supply chain
(Universidad de Tarapaca, 2017)This paper presents a Methodology of Inventory Management that determines the levels of integration and cooperation in a supply chain, so that policies and joint actions to improve the performance of the actors in the chain ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.