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Copyright of Electronic Journal of Research in Educational Psychology is the property of Editorial of the University of Almeria (Spain) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingenius, Revista Ciencia y Tecnología is the property of Universidad Politecnica Salesiana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Anagramas is the property of Editorial Universidad de Medellin and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia Ergo Sum is the property of Universidad Autonoma del Estado de Mexico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ingenium is the property of Facultad de Ciencias Basicas e Ingenieria de Universidad de San Buenaventura, Revista Ingenium and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista EIA is the property of Escuela de Ingenieria de Antioquia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Magis: Revista Internacional de Investigación en Educación is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Economía Aplicada is the property of Revista de Economia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Meteorologica is the property of Centro Argentino de Meteorologos and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Formación Universitaria is the property of Centro de Informacion Tecnologica (CIT) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Boletín Criminológico is the property of Instituto Andaluz Interuniversitario de Criminologia (Seccion Malaga) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Prospectiva (1692-8261) is the property of Universidad Autonoma del Caribe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Theory of Inventive Problem Solving (TRIZ) is a method widely used today to solve engineering tasks and to develop new products. Two of the key foundations to apply TRIZ are the matrix of contradictions and the engineering principles. They have remained almost unchanged since their origin, and designers have difficulty using them successfully in a wide range of engineering problem configurations. The objective of this paper is to present the results of contradiction matrix and the engineering principles analysis, based on current scientific and technological development, as well as the modifications required in the field of mechanical engineering in general, applied to the design of plastic spur gear transmissions. [ABSTRACT FROM AUTHOR]

Copyright of Desarrollo y Sociedad is the property of Universidad de los Andes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Maderas: Ciencia y Tecnología is the property of Universidad del Bio-Bio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

There are many equipments that work the most part of their time in transient regime; therefore, in the design of their drive systems must be employed different methodologies to when, they work in stationary regime. In this paper is shown the application of two distinct methods to the design and selection of the components of an drive system for rapid movements. The Transient Power - Double Kinetic Energy Method and Torque - Time Constant Method were applied to select the drive system of a axis to linear guidance in a punch machine, this case was developed within a project founded by Colciencias. It was necessary to use MATLAB and information obtained from catalogs in order to carry out the required simulations in the evaluation process of the convenience of distinct drive kinds. Also, in this paper is analyzed the complementariness of the referenced methods. [ABSTRACT FROM AUTHOR]

Copyright of Revista EIA is the property of Escuela de Ingenieria de Antioquia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Optimization based on Ant Colony two stages (TS -ac), it represents a way to improve exploration strategy meta-heuristic optimization based on Ant Colony (ACO). TS-ACO, it is based on the methodology of "divide and conquer" and its effectiveness has been proven in several discrete optimization problems. In this paper, three approaches to TS-ACO are presented and appropriate adjustments are made to test their effectiveness in solving the problem of Coverage Sets (SCP). These approaches use partial results (only sub solution (S-TS-ACO) or only pheromone trail (P-TS-ACO) or both (PS-TS-ACO)), obtained in the first phase, in order to guide exploration in the second phase of the search process. Experimental results show that the best solutions are achieved by the variant P-TS-ACO. Finally a comparative study of the two-stage strategy and the original ACO strategy was performed. The results show that the proposed P-TS-ACO, you get significantly better results than the original strategy, in the same execution time and under the same parameter values. [ABSTRACT FROM AUTHOR]

Copyright of Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales is the property of Academia Colombiana de Ciencias Exactas, Fisicas y Naturales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents a numerical-analytic solution for the flow of a ferrofluid in the annular gap between two concentric cylinders induced by a rotating magnetic field. Unlike analytical solutions presented in the literature, this analysis takes into account the effect of the terms ω x M and V ·M in the magnetization equation which are commonly disregarded in order to decouple the magnetic hydrodynamic problem obtaining in this way an analytical solution. However, it was found that its effect is negligible under the assumption that the magnetization vector of the ferrofluid is proportional to magnetic field vector. The numerical results show a good agreement with the asymptotic solution reported by Chaves et al. 2010. We also review the range of application of this analysis and others reported in the literature made under assumption of proportionality of the vectors of magnetization and magnetic field. [ABSTRACT FROM AUTHOR]

This paper presents the development of a numerical study performed to analyze the ground surface behavior due to the construction of tunnels in soft soils, specifically in the case of typical stratigraphy of the alluvial zone of Bogotá. A finite element platform PLAXIS 3D TUNNEL® was used to determine the relationship between the settlement and the tunneling excavation with TBM in this type of soil. The levels of impact in the settlement phenomenon were studied by five factors: the constitutive model of soil materials, the depth of excavation, the performance of the TBM, the diameter and thickness of the tunnel lining. The research concluded the following result: the most influential factors in the magnitude of the settlement phenomenon are the tunnel diameter and the depth of excavation. [ABSTRACT FROM AUTHOR]

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Internacional de Desastres Naturales, Accidentes e Infraestructura Civil is the property of University of Puerto Rico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper, an asynchronous motor simplified thermal model method for conductances and capacitances estimation is presented. A low invasive technique is used. The developed procedure allows the stator temperature rise prediction, not only for dynamic regimes, but also in case of thermal stability. A parametric estimation is done through a reference model, using a genetic algorithm (GA) as optimizing method. The thermal model parameters are finally obtained with an easer experimental work, than the required by other complex experimental methods or by analytical calculations based on design data. The proposed procedure can be carry out in the particular conditions of industrial environment. Its application is specially useful for asynchronous machine thermal analysis. Using the data of a study case reported in literature, the method validation is done, and is applied in an industrial real case, with good precision resulted from it. [ABSTRACT FROM AUTHOR]

This article is one of the results obtained in a research project funded by EAFIT University in 2011, This paper is based upon a study carried out by Lacus and La Torre [1], it presents the fractal estimation through Iterated Function Systems (IFS), as an alternative to estimate the distribution function of added losses which is necessary to quantify the operational risk. As it is shown in the analysis, this technique can deal with some of the difficulties presented with some of the classic actuarial methodologies. Furthermore, an application is presented and conclusions are obtained from it. [ABSTRACT FROM AUTHOR]

This paper presents the use of the finite elements method to study the flanking transmission through the use of the vibration reduction index, for the case of constructive solutions that use floating floors. On one side, the insertion of elastic interlayer in new building solutions is now a very common practice. On the other side, the test procedures for the acoustic study of this kind of sets (concrete floor with elastic interlayer) are very laborious and the existing empirical equations do not match reality in many cases. For this reason, the study of the problem using finite elements would allows giving numerical solution to a wide range of different constructive solutions and numerical prediction for the acoustical isolation could be improved. [ABSTRACT FROM AUTHOR]

In this paper we propose a multiplicative generalized binomial trees recombi-nation associated with the autonomous equation in terms of the initial condi-tion and the product of non-constant upwards and downwards jumps from the discretized process. We present a formal technique for finding the dynamic transition probabilities involving the first two moments of the solution to the differential equation, which incorporate the factor of growth and volatility in terms of the parameters and the underlying process along its branching. Some experimental numerical results are shown for European option pricing for log-normal process and the processes of mean reversion with additive noise and proportional noise for different expiration dates. [ABSTRACT FROM AUTHOR]

Copyright of Revista Tecno Lógicas is the property of Instituto Tecnologico Metropolitano and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper a theoretical analysis of magnetic three-phase induction machine is presented, including an identification parameter from its equivalent circuit. The approach has become an outstanding model for the mechanical part in the same equivalent circuit, and the machine as a whole. The equations obtained have been raised as state variables. Then, the differential equations can be expressed in function of the first derivative, obtaining a unified method for the simulation and numerical analysis. Through programs developed in C++, a complete sensitivity analysis for the steady state and dynamic models was developed. This allowed to observe and to study the influence and relationship between these parameters. [ABSTRACT FROM AUTHOR]

Copyright of Revista Iberoamericana de Ingeniería Mecánica is the property of Editorial UNED and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Global support radial base functions are effective in eliminating impulsive noise in non-linear processing. This paper introduces an interpolation technique which efficiently reduces image impulsive noise by means of an interpolant obtained through radial base functions. These functions have been used in a research project designed to develop a system for the recovery of images of Amazonian aquatic resources. This technique starts with the tagging by interpolation of noisy image pixels. Thus, a value of reconstruction for the noisy pixels is generated using neighboring pixels. The results obtained with this technique have proved comparable and often better than those obtained with previously known techniques. According to results analysis, this technique can be successfully applied on images with high noise levels. The results are low error in noisy pixel reconstruction and better visual quality. [ABSTRACT FROM AUTHOR]

Copyright of Ingeniería Hidráulica en México is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In measuring quantities such as longitudes, areas, weighs, etc, it is not enough to count -which would be solved with natural numbers-because in general the measurement of the given quantity cannot be expressed using multiples of the selected unit. In effective measures it is necessary to resort other numerical domains, such as the rational numbers. In this paper we will analyze the explicit relation between numerical domains and measurements, in some current curricular documents, through the focal points which refer to the study of numbers and operations, and geometry and measurement. [ABSTRACT FROM AUTHOR]

In this paper presents an approximation for a trapezoidal type fuzzy number by a sequence of ϵ-differentiable fuzzy numbers, i.e. fuzzy numbers with differentiable membership function in the interior of the ϵ-level. The process consists on the construction of a differentiable fuzzy number using sup-min-convolution of a fuzzy number with a quasi-Gaussian fuzzy number. This work shows some numerical examples and a computational algorithm for this process. [ABSTRACT FROM AUTHOR]

The present paper shows an application of graphical programming in the numerical solution and simulation of nonlinear oscillating systems. The RK4 method was implemented to integrate the "Pendulum with forced suspension's point" motion equations, and a graphical interface was developed by means of the software LabVIEW to simulate the experiment in the PC. In addition we present the obtained graphics of the Poincaré's section and the set's transformation on the phase diagram. [ABSTRACT FROM AUTHOR]

This paper presents the method to obtain, in Cartesian coordinates, the parallel curve lines of non-degenerate conical curves, by analytical and numerical methods. Offset is defined as parallel function to the original function to a distance r. Offset of a conic is important for the manufacturing processes of mechanisms, lenses, mirrors, and molds; especially in the turning with computerized numerical control (CNC) of surfaces of revolution with conical sections, using diamond tools of radio r. Also a refined tip technique using segmental circular interpolation to numerically construct the parabola offset is presented, that also can be used as model to determine offsets of ellipse and hyperbola. [ABSTRACT FROM AUTHOR]

The majority of the developments in a classic problem of competing risks have consisted in, based on the assumption of independence between all event types, make estimations to several rates. In this paper, we propose an adjusted Life-Table estimator in the context of non-independent competing risks. We proof that the proposed estimator is maximum pseudo-likelihood. We compare the adjusted and classic estimators by simulation study. It confirmed that de adjusted estimator provides closer estimations to the real rate than the classic estimator. [ABSTRACT FROM AUTHOR]

This paper presents an experimental and numerical analysis for the description of the mechanical behaviour of a carbon steel wire during an industrial process of damp drawing. Firstly, an experimental procedure aimed at measuring wire drawing forces in the twelve reductions present in the process was performed. Secondly, tensile tests were carried out in order to characterize the mechanical behavior of the material for each reduction step. The resulting stress-strain curves together with the computed responses obtained from the simulation of such tests allowed to derive the evolution of the representative elastic and plastic material parameters. This parameter evolution clearly refiected the relevant amount of hardening experienced by the material which, in turn, imposes restrictions over the drawing operation. The numerical simulations were conducted via a large strain elasto-plasticity model implemented in an existing finite element-based code called VULCAN. The material parameters obtained in the tensile tests were considered as data for the modeling of the entire wire drawing sequences. The computed results are considered as reasonable and representative of the material response during the deforming process. [ABSTRACT FROM AUTHOR]

This paper compares two finite elements formulations used for solving fluid structure interaction problems in acoustics. In this case the displacement is used as variable for representing the behavior of the acoustic fluid. Finite element codes are writing for each formulation and typical fluid structure interaction problems are solved. The results obtained with each formulation are compared and advantages and disadvantages are obtained. [ABSTRACT FROM AUTHOR]

In this paper we introduce a tensonorm defined by interpolation spaces of ℓp spaces and characterize the minimal operator associated in the sense of [1]. [ABSTRACT FROM AUTHOR]

Real option analysis is becoming increasingly well known among valuation practitioners. The early rather limited formulae are now being replaced by powerful and flexible software tools. The aim of this paper is to provide a reasoned analysis of the advantages and principles of this type of modern ?valuation engine?, through the study of the successive stages involved in the real option valuation process. [ABSTRACT FROM AUTHOR]

In this paper is presented the design, construction and experimental validation of a dynamometric device of natural variable frequency where the influence of the natural frequency values in the magnitude of the mean value of cutting forces measured in a lathed process were determined. The dynamometer with three values of natural frequency, in ranges of 2000, 6000 and 8000 Hz was designed by means of the finite elements method. A dynamometer device was constructed for the verifications of the natural frecuencies obtained by finite element method. The experimentally results validation confirmed the developed models [ABSTRACT FROM AUTHOR]

This paper deals with the tension and deformation analysis in structures of lifter mark, platform and cabin of freight lifters by means of the Finite Elements Method, specifically the 300 kgs capacity dumbwaiter, in order to carry out the resistance analysis, weight and material rationalization. [ABSTRACT FROM AUTHOR]

This paper shows simulations of the performance of Code Division Multiple Access optical communication systems (OCDMA), using apodised fibre Bragg grating (FBG) arrays as passive encoding-decoding devices. Auto and cross-correlation functions of the user signals, and bit error rate (BER) were used as evaluation criteria. Through numerical analysis, we demonstrated that when strong Bragg gratings are used, the performance of the system is increased. [ABSTRACT FROM AUTHOR]

A new method to solve the branching problem in surfaces of three-dimensional (3D) models reconstructed from parallel cross sections is presented in this paper. This is an important problem in medical imaging and others object-modeling applications, where the reconstruction of the surface of 3D models from images that represent a set of parallel planes is of interest. The proposed method is based on the skeletonization technique to create new contours, corresponding to an artificial intermediate slice that models the level where branching occurs. Some experimental results of the application of the proposed method to solve the branching problem on synthetic complex examples and actual medical imaging data are showed. [ABSTRACT FROM AUTHOR]

"Multidimensional Scaling" is the name of a set of procedures with the objective of data representation in a graphical plot when some information about similarities between objects is known. The history of these procedures began with Torgeson's work in 1952 who gave the preliminary ideas. Since then many investigators have developed other works with one only aim: to obtain a euclidean representation most similar to the starting proximities between objects. In this paper we show the main purposes and some essential concepts about this thematic. [ABSTRACT FROM AUTHOR]