Examinando por Materia "engineering"
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Ítem 10 Challenges for the Specification of Self-Adaptive Software(IEEE, 2018-01-01) Munoz-Fernandez, JC; Mazo, R; Salinesi, C; Tamura, G; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesThe demand for systems that continue on operation by adapting themselves in response to disturbing changes in their environment has increased in the last decades. Those systems, termed self-adaptive software (SAS) systems, should be developed with techniques and methods appropriated for analysing and designing this kind of systems, starting from the requirements phase. Several contributions propose approaches to improve the specification of requirements for those systems. This paper aims to review the most significant challenges still open in the domains of languages for requirements specification and methods for model verification of self-adaptive systems, independently of their particular application areas. More concretely, the main contribution of this paper is a list of ten challenges to achieve a better-defined specification of requirements for SAS systems, and a more effective verification of such specifications. These challenges are well worthy of being addressed in both communities, the requirements engineering (RE) and the SAS one.Ítem 2D simulation flue implementing the lattice-boltzmann method(TRANS TECH PUBLICATIONS LTD, 2014-01-01) Ruiz, D.B.; Mesa, A.A.; Alvis, R.G.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesCurrently in the process of engineering, but increasingly implemented simulation methods since they are an economical and feasible to predict the behavior of some variable you wish to benefit. The problem of fluid simulation is a broad field of study, traditionally in this area are implemented domain discretization methods, volumes, differences or finite elements (Computational Fluid Dynamics), in this work, a different approach where the discretization is made on the physical properties of fluid and the fluid for reconstruction from its microscopic properties, simulating these, propagating Boltzmann distribution functions for the grid of nodes, this set is comprised of a fluid group of nodes, nodes fluid the border and nodes structure, docked the method to the boundary conditions necessary to simulate Glycerol in a pipe. © (2014) Trans Tech Publications, Switzerland.Ítem Design and usability evaluation of a multi-input interface in an idTV environment(Springer Verlag, 2017-01-01) Téllez J.F.; Montoya J.C.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesIn recent years, and considering the rise of Interactive Digital Television (idTV), it has been great interest in the design of applications and services for this platform. However, the success of these applications largely depends on the ease of use and how users interact with them. For this reason, we have explored different interfaces and modes of interaction to improve the user experience with these applications in comparison with the traditional Remote-Control (RC). This article presents an interaction with idTV applications using multiple input control interfaces with different modes of interaction such as touch buttons, gesture recognition, voice recognition, and recognition of movements. These modes of interaction were validated through usability testing using a model of quasi-experimental evaluation of three dimensions, where each dimension represents respectively: users, tasks and control interfaces. As a result of the qualitative and quantitative assessments, we performed an analysis of possible improvements in the usability of a particular application of idTV. The results showed few differences between one multi-input control interface and one RC in tasks the user was familiar with, on the opposite, significant differences were found in performing tasks involving greater user interaction, such as the text input or navigation between menus. © Springer International Publishing AG 2017.Ítem Design of a competences based teaching model supported in the integration of repositories and LMS platforms for the automatic control of processes course(Institute of Electrical and Electronics Engineers Inc., 2015-01-01) Gomez, G.I.C.; Diaz, T.A.G.; Zea, R.C.M.; Zapata, R.L.F.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesThe Automatic Process Control course is part of the Mechanical Engineering, Process Engineering and Production Engineering programs, offered by EAFIT University (Medellin, Colombia). This course has had a number of reforms in recent years, from two academic spaces to one that contains all the content and features them from theoretical and practical components. With this transformation, was generated the need to reduce the time commitment to each of the thematic, causing learning issues in students. For this reason, we have proposed a new reform in the course through the implementation of a content management model based on competences and supported by the integration of repositories and LMS platforms. This model seeks to train students in the skills defined by the courses and because of this, it is important that the learning process provide mechanisms to validate the skill level of each student, taking into account the outcome of the validation should correspond directly to the skills acquired in the training process. To support this model, there are technological tools as platforms for learning management and learning object repositories that support the online teaching and learning processes, and support the use of standards, generating interoperability, reusability, adaptability and scalability content. © 2014 IEEE.Ítem An Entropy-Based Graph Construction Method for Representing and Clustering Biological Data(SPRINGER, 2019-10-01) Ariza-Jiménez L.; Pinel N.; Villa L.F.; Quintero O.L.; Universidad EAFIT. Departamento de Ciencias; Biodiversidad, Evolución y ConservaciónUnsupervised learning methods are commonly used to perform the non-trivial task of uncovering structure in biological data. However, conventional approaches rely on methods that make assumptions about data distribution and reduce the dimensionality of the input data. Here we propose the incorporation of entropy related measures into the process of constructing graph-based representations for biological datasets in order to uncover their inner structure. Experimental results demonstrated the potential of the proposed entropy-based graph data representation to cope with biological applications related to unsupervised learning problems, such as metagenomic binning and neuronal spike sorting, in which it is necessary to organize data into unknown and meaningful groups. © 2020, Springer Nature Switzerland AG.Ítem Functionalized Low Density Polyethylene with Maleinized Hyperbranched Polyester Polyol(Universidad EAFIT, 2016-02-22) Ararat, Carlos A; Murillo, Edwin A.; Universidad Francisco de Paula SantanderÍtem An immersive virtual reality training system for mechanical assembly(2011-01-01) Peniche, A.; Diaz, C.; Trefftz, H.; Paramo, G.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesGiven the growing evolution of technology, machinery and manufacturing techniques, conventional methodologies for training the workforce are not enough for the current needs. Therefore methodologies capable to accelerate the training process and able to train the trainee in a wide range of scenarios are claimed for the industrial sector. Virtual reality offers an alternative that has been successfully implemented in other industries, and virtual reality based training systems have numerous advantages over the conventional methodologies, making it a very good option. Based on that premise, this paper explores the implementation of an immersive training system for mechanical assembly based on virtual reality for improving the training process. This system was proved to be as effective as the conventional methodology.Ítem Improving Student Results in a Statics Course using a Computer-based Training and Assessment System(IEEE, 2013-01-01) Zapata Rivera, Luis Felipe; Restrepo Ochoa, Jorge Luis; Barbosa Perez, Jaime L.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)One of the main causes of desertion in engineering programs is the poor student academic performance in basic courses. One of these courses is Statics, which is taught at the undergraduate level. Between 2009 and 2011 about 30% of students did not get a satisfactory grade to pass the course and a high percentage of these students deserted from their engineering program at EAFIT University. The evolution of computer systems and the Internet progress have enabled educators to develop software to support teaching and learning processes. For instance, educational software like E-learning platforms now allow teachers and students to interact through collaborative and friendly environments that can result in improvement on student learning outcomes and therefore improvement in their final results. Various learning tools based on problem-based learning approaches have been developed for the Statics area. These systems usually pose problems for students to solve; however, the problems usually used to evaluate and certify student knowledge are different from those used by the students during their training process. This is aimed at focusing students' attention to the use of analytical skills instead of memorizing processes. This paper describes the results of using a computer system to support training and assessment processes to convey concepts related to a Statics course using an existing open source tool and implementing a dynamic assessment generation scheme (i.e., generation of multiple versions of the same problem using algorithms with variables). This system has been used in the Statics courses during two academic periods in 2012 involving the participation of 400 students. The results of this experiment are compared with performance results of students from previous years who used traditional practice and assessment methods such as solving tasks in conventional paper and pencil tests. Results have had a positive impact in student grades and retention.Ítem Remote teaching functional and anatomical concepts skeletal muscle system(SPRINGER, 2008-01-01) Leon, C.A.D.; Trefftz, H.; Pineda, F.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesIn this paper we present the results of using a virtual content developed inside a telepresence application. The application combines video-conference with networked virtual environment allowing an instructor and a group of students to manipulate a virtual object in a collaborative manner. The virtual environment describes bones and muscular structures in order to support teaching of musculoskeletical concepts in a remote physiology class. The virtual environment simulates the movement of flexion and extension of the elbow and the muscular contraction. Current preliminary results show that the content developed within telepresence application can compensate for the lack of physical presence of the instructor in the classroom. © Springer-Verlag Berlin Heidelberg 2007.Ítem Technological tools to learn calculus(Institute of Electrical and Electronics Engineers Inc., 2015-12-02) Gómez, G.P.P.; Restrepo, C.M.Z.; Duarte, P.V.E.; Rivera, L.F.Z.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesOnline learning tools have allowed professors to carry out their classes in an interactive way, synchronic as well as asynchronic, giving them the opportunity to explore from different points of view specific themes or concepts, achieving greater dynamism in their classes through the active participation of students. This article presents the results of the implementation of an software tool for massive use designed with the objective of allowing Engineering students to strengthen their basic mathematical knowledge as well as to improve their results in courses such as Calculus I and Mathematics I. These courses are part of the first semesters of the syllabus for all undergraduate programs of the School of Engineering, and are basic courses in the formation of an engineer at Universidad EAFIT (Medellin, Colombia). This software tool for massive use allows students to self-diagnose, to solve exercises with different levels of complexity and difficulty, to visualize academic contents such as video classes and virtual resources, and to know their evolution in the understanding of basic concepts in calculus. On one hand, this facilitates the beginning of their studies at the university. On the other, it gives the professor an initial diagnose of the level students have to start the course so that continuous analytics can be performed based on the learning process of the student. Furthermore, this article shows the results of a comparative analysis done to two groups of students, a Control group and an Experimental group, that took Calculus I as part of their undergraduate studies. The experiment lasted two months with testing done at the beginning and at the end of the course. The objective was to register the level of knowledge acquired by the students and compare the differences between the two groups, control and experimental. The testing also allowed the progress of the student between tests to be measured, taking into account that the experimental group had the opportunity to explore the platform during this two-month period. Therefore, the analysis performed served to gather information useful for evaluating the effectiveness of the proposed system in the learning process of the students at the University. © 2015 IEEE.Ítem Use of a serious game for teaching operations programming: Students' perceptions(Institute of Electrical and Electronics Engineers Inc., 2018-01-01) Carmona Gonzalez G.L.; Pelaez Valencia L.E.; Trefftz H.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesThis paper describes the experiences in the design, construction and validation of a serious game to be used as a support to teach Operations Management (or Operations Programming) in a Production Engineering program. The aim of this publication is to describe the perceptions of the students during the various development stages of the process. A semi-experimental study was conducted in order to determine the pedagogical effectiveness of the use of the game, but in this paper the authors focus on the perceptions of the students, which may become an important input for other faculty interested on using serious games as support for teaching other engineering courses. © 2018 IEEE.Ítem WYDIWYN – What you define, is what you need: Defining agile/traditional mixed methodologies(Springer Verlag, 2018-01-01) Bustamante A.F.; Rincón R.D.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesDefining software development methodologies may jointly include traditional and agile frameworks practices. Agile frameworks give teamwork structure and dynamics which are focused on delivering value in an incremental way. Traditional frameworks establish clarity in work products and project phases along all its lifecycle. The combination of frameworks can help to apply best practices of different models, but increasing the complexity in the methodology definition when having to start from contexts of a different nature. You will see in this article a carried out study that confirms the use of agile/traditional mixed methodologies in the industry, the difficulties that emerged and that are still seen in this approach, and the creation, setting and analysis of a guide that helps to uncomplex the definition of mixed methodologies. © Springer International Publishing AG 2018.