Person:
Vanegas Peralta, Pablo Fernando

Birth Date

1972-05-28

ORCID

0000-0003-3418-7670

Scopus Author ID

25522712400

Afiliación

Universidad de Cuenca, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Ciencias de la Computación, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Espacio y Población, Cuenca, Ecuador
Universidad de Cuenca, Facultad de Ciencias Químicas, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Ingeniería Eléctrica, Electrónica y Telecomunicaciones(DEET), Cuenca, Ecuador
KU Leuven (Katholieke Universiteit Leuven), Leuven, Bélgica

País

Ecuador

Organizational Units

Organizational Unit

Facultad de Ingeniería

La Facultad de Ingeniería, a inicios de los años 60, mediante resolución del Honorable Consejo Universitario, se formalizó la Facultad de Ingeniería de la Universidad de Cuenca, conformada por las escuelas de Ingeniería Civil y Topografía. Esta nueva estructura permitió una mayor especialización y fortalecimiento en áreas clave para el desarrollo regional. Cuenta con programas académicos reconocidos internacionalmente, que promueven y lideran actividades de investigación. Aplica un modelo educativo centrado en el estudiante y con procesos de mejora continua. Establece como prioridad una educación integra, la formación humanística es parte del programa de estudios que complementa a la sólida preparación científico-técnica. Las actividades culturales pertenecen a un programa permanente y activo al interior de nuestras dependencias, a la par de proyectos que desde el alumnado y bajo la supervisión de docentes cumplen con servicios de apoyo a nivel local y regional; promoviendo así una vinculación estrecha con la comunidad.

Job Title

Profesor (T)
Rector de la Universidad de Cuenca (2016 - 2021)
Decano de la Facultad de Ingeniería de la Universidad de Cuenca
Subdecano de la Facultad de Ingeniería de la Universidad de Cuenca
Vicerrector de Investigación y Posgrado en la Escuela Superior Politécnica de Chimborazo (ESPOCH) (2021 - )

Last Name

Vanegas Peralta

First Name

Pablo Fernando

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Search Results

Now showing 1 - 10 of 24

Aplicación de servicios web estándares para el monitoreo hidrometeorológico automático, integrando información de sensores diversos mediante ontologías
(2018) Veintimilla Reyes, Jaime Eduardo; Vanegas Peralta, Pablo Fernando; Estrella Maldonado, René Gustavo
The last developments in worldwide technology and the continuous growth in telecommunications have resulted in the requirement to make available the information generated by a number of devices, especially for those that incorporate sensors, with the goal of reacting to any relevant events that could occur. The latest advances in this area have resulted in the development of several devices with heterogeneous types and from different vendors. This paper presents a proposal for an architecture that integrates several standard web services for the compilation, organization and storage of the information generated by a network of hydrometeorology sensors. Likewise, the paper proposes the application of standard services for controlling remotely these sensors and for managing events and generating early warnings. The aforementioned web services are some examples of the set of services that form the Sensor Web Enablement standard. Considering the diversity, both in type and vendor, that is typically found among the stations and sensors in a hydrometeorology monitoring network, this paper additionally proposes the application of ontologies with the goal of homogenizing and integrating the information coming from this diverse infrastructure.
TiO2 nanorods coated onto nylon 6 nanofibers using hydrothermal treatment with improved mechanical properties
(ELSEVIER B.V., 2014-09-05) Abdal-Hay, A; Vanegas Peralta, Pablo Fernando
Well-aligned arrays TiO2 nanorods were deposited onto electrospun nylon 6 (N6) nanofibers. The complete coverage of individual fiber surfaces with TiO2 nanorods occurred in a very short time using a cost effective hydrothermal technique. The results demonstrate that organic molecule substrates have a considerable influence on nucleation and precipitation mechanism and uniform distribution behaviors of TiO2 onto N6 nanofibers surface with good interfacial adhesion between the components. N6 decorated with large number TiO2 nanorods showed good hydrophilicity. Significant improvement in mechanical properties like tensile strength and modulus of the TiO2/N6 composite membrane mats in comparison to the pristine N6 mats was observed by applying just 2h reaction process. The resultant TiO2/N6 spider-net like composite mat with good hydrophilicity may be a potential candidate for future water filter applications, and its improved mechanical will also make it a potential candidate for protective clothing. © 2014 .
Cardiac Motion Estimation in Magnetic Resonance Images Using Optical Flow
(IEEE COMPUTER SOCIETY, 2016-06-01) Medina Molina, Ruben; Morocho Zurita, Carlos Villie; Vanegas Peralta, Pablo Fernando
This paper reports an optical based method for quantification of cardiac motion in MRI images. The cardiac motion is quantified in a Short-Axis (SAX) slice located at the mid-cavity of the left ventricle. In this slice, the left ventricle wall is segmented for extracting the endocardium, the epicardium and the midwall. The velocity field for these contours is available after performing the optical flow estimation for the given slice. Post-processing of this motion field enables estimation of the radial displacement. The core of this cardiac motion quantification method is a sparse based algorithm for optical flow estimation. This algorithm is presented and compared with several classical optical flow estimation algorithms. The comparison is performed using several video sequences available from the Middlebury benchmark where the ground truth optical flow is known. The algorithms with better performance are also tested using a 4 D cardiac Magnetic Resonance Image (MRI) sequence. Results show that he sparse algorithm estimates an optical flow field that represents the motion of contraction during the systole interval. Moreover, results about radial displacement estimation on real MRI sequences for a normal subject and a patient with hypertrophy show that the proposed quantification method could be useful for quantification of left ventricle motion.
Factores que influyen en la selección de energías renovables en la ciudad
(2019) Barragán Escandón, Edgar Antonio; Zalamea León, Esteban Felipe; Terrados, Julio; Vanegas Peralta, Pablo Fernando
Urban energy models assume that energy is imported from outside the urban area. Forecast increases in urban population and energy use intensity will increase energy requirements. One alternative is to integrate sources of renewable energy within cities boundaries. To do so, differences in urban form, resources availability, energy requirements, condition of buildings, infrastructure, and population and building density make city-specific analysis necessary. This study identifies 14 factors that urban planners should consider to make the most appropriate technology choices for a given city. Through consultation with 78 experts, the presence of renewable energy sources was selected as the most important factor, followed by economic conditions in the city. The least important factors were environmental consequences of global warming, eutrophication and acidification
Preparation and characterization of vertically arrayed hydroxyapatite nanoplates on electrospun nanofibers for bone tissue engineering
(ELSEVIER, 2014-10-15) Abdal-Hay, A; Vanegas Peralta, Pablo Fernando
The aim of this study is to develop a facile and an efficient approach for providing the electrospun nanofibers scaffold with a vertically well-aligned and homogeneous distribution of hydroxyapatite (HA) nanoplates that coat the scaffold while maintaining its fibrous and porous structure. Crystal growth of HA nanoplates from a colloidal solution onto the surface of nylon (N6) nanofibers was carried out via a hydrothermal approach. The factors affecting the scaffold's morphology, macrostructure and the interfacial bonding between the constituents as well as the influence of crystal size were characterized and well elucidated. The results revealed that the deposition of dense and thick uniform nanoplates was perpendicular and nucleated in a parallel configuration onto the longitudinal axes of the individual nanofibers during the treatment process. The sizes of the nanoplates, which are strongly dependent on the reaction time, were 30 and 95. nm in length, with thicknesses of 17-19. nm, after 2 and 3. h respectively. The nanoplates improve the mechanical properties of the HA/N6 biocomposite scaffolds. The surface properties of the fabricated scaffolds appeared to have a greater effect on the early stages of osteoblast behavior (cell attachment and proliferation). The cells attached, grew and proliferated faster on culture-coated scaffolds in comparison with the pristine ones. Our results indicate that the treated scaffolds fulfill the basic requirements of bone tissue engineering scaffolds, and have the potential to be applied in orthopedic and reconstructive surgeries. © 2014 Elsevier B.V.
Peak control current in boundary conduction mode and discontinuous conduction mode for inverter with flyback topology
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2015-06-02) Sempertegui Alvarez, Rodrigo Efrain; Vanegas Peralta, Pablo Fernando
This paper proposes a hybrid control scheme peak current, applied to a single-phase micro inverter with flyback topology coupled to a LC filter, the proposed scheme allows the inverter to operate by boundary conduction mode when the output current exceeds a predetermined value. Otherwise, it operates in the discontinuous conduction mode, limiting the switching frequency. To set the control system in both modes of operation, the inverter is identified by averaging the model state and small signal, the control scheme used, presents a classic PI control and is tuned by pole placement. The proposed control scheme is verified through computer simulation.
Energy self-supply estimation in intermediate cities
(2020) Barragán Escandón, Edgar Antonio; Zalamea León, Esteban Felipe; Vanegas Peralta, Pablo Fernando
© 2020 Elsevier Ltd Cities are responsible for more than three quarters of greenhouse gas emissions due to their intensive use of fossil resources. Hence, proposals to modify the current urban energy model have been established. The comprehensive inclusion of renewable energies in the urban area of the intermediate city of Cuenca will be analysed. In previous studies, it was established that five renewable technologies have the greatest opportunities for implementation in the city. Therefore, this research proposes a methodological approach to establish the impact of the inclusion of each of these technologies, and the Long-range Energy Alternative Planning (LEAP) model is used to establish the urban energy balance. Through the construction of scenarios and the evaluation of energy balances, it is concluded that it is possible to reduce the energy flows that enter the city by applying these five energy sources. The results indicate a self-supply potential of up to 33.9% of the total urban consumption; however, due to the type of local energy matrix, only 13% of this energy could be consumed under current conditions, and the remained would be surplus power. Photovoltaic (PV) technology has a significantly higher potential than the other technologies as it exceeds the electricity demand 3.19-fold. The conclusion is that the conversion of currently fuel-powered services to electrical power is necessary to maximize clean self-generation.
The design of a flexible bus line plan
(2022) Vanegas Peralta, Pablo Fernando; Vansteenwegen, Pieter; Ávila Ordóñez, Elina María; Tampére, Chris
A conventional bus service has a line plan that consists of a set of lines with fixed routes designed to operate under normal conditions. Thus, the performance of the service depends on how stable those conditions are. This paper extends the traditional concept of a line plan to provide a high-quality service, even in case of announced events. We introduce the concept of a Flexible Line Plan where some of the usual lines are replaced with alternative lines that improve the service when the conditions change. Adaptations should only be made to a subset of the lines, ensuring that the changes minimize the inconvenience for the regular passengers and, at the same time, improve the total travel time. In this study, we present a heuristic called Alternative Line Heuristic (ALH), based on Genetic Algorithms, which automatically designs these alternative lines in a three-step process. The results of this approach are tested on both benchmark and real-sized networks and clearly show how our approach contributes to improving the bus service performance.
Allocating reforestation areas for sediment flow minimization: an integer programming formulation and a heuristic solution method
(2012) Vanegas Peralta, Pablo Fernando
Policy and decision makers dealing with environmental conservation and land use planning often require identifying potential sites for contributing to minimize sediment flow reaching riverbeds. This is the case of reforestation initiatives, which can have sediment flow minimization among their objectives. This paper proposes an Integer Programming (IP) formulation and a Heuristic solution method for selecting a predefined number of locations to be reforested in order to minimize sediment load at a given outlet in a watershed. Although the core structure of both methods can be applied for different sorts of flow, the formulations are targeted to minimization of sediment delivery. The proposed approaches make use of a Single Flow Direction (SFD) raster map covering the watershed in order to construct a tree structure so that the outlet cell corresponds to the root node in the tree. The results obtained with both approaches are in agreement with expert assessments of erosion levels, slopes and distances to the riverbeds, which in turn allows concluding that this approach is suitable for minimizing sediment flow. Since the results obtained with the IP formulation are the same as the ones obtained with the Heuristic approach, an optimality proof is included in the present work. Taking into consideration that the heuristic requires much less computation time, this solution method is more suitable to be applied in large sized problems.
Left ventricle myocardium segmentation in multi-slice computerized tomography
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2016-10-19) Bautista Llivisaca, Mateo Sebastian; Morocho Zurita, Carlos Villie; Vanegas Peralta, Pablo Fernando
This paper briefly describes a left ventricle myocardium segmentation method in multi-slice computerized tomography images. The segmentation technique is based on level-sets deformable contours. The proposed method has two stages: in the first stage the left ventricle internal wall or endocardium is segmented. In the second stage the external wall is segmented starting with an initialization based on the endocardial segmented shape. This algorithm is intended for incorporation within a software platform for visualization and processing of cardiac images. This platform would help the diagnosis of the left ventricle hypertrophy (LVH).