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Mostrando ítems 1-20 de 92
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A rising role for decentralized solar minigrids in integrated rural electrification planning? Large-scale, least-cost customer-wise design of grid and off-grid supply systems in Uganda
González García, Andrés; Ciller Cutillas, Pedro; Lee, Stephen J.; Palacios Hielscher, Rafael; Cuadra García, Fernando; Pérez Arriaga, José Ignacio (2022-07-01)Increasing Uganda’s low electrification rate is one of the country’s major challenges. Power service is essential to achieve socioeconomic development and poverty reduction, especially in rural areas. This paper shows the ... -
A straightforward method for creating and verifying digital signatures in HTML forms
Palacios Hielscher, Rafael; de la Fuente González, David (2009-01-08)Web-based forms, created in HTML language, are widely used to submit data to Internet servers. However the process of submitting forms using http protocol is anonymous. In this article, two pieces of code are provided to ... -
A system for processing handwritten bank checks automatically
Palacios Hielscher, Rafael; Gupta, Amar (2008-10-01)In the US and many other countries, bank checks are preprinted with the account number and the check number in special ink and format; as such, these two numeric fields can be easily read and processed using automated ... -
A tool for the assessment of the electromagnetic forces in power distribution transformers
Da Costa Lopes, Andrey; Sanz Bobi, Miguel Ángel; Rouco Rodríguez, Luis; Palacios Hielscher, Rafael; Flores Losada, Luis; Cirujano Ballesteros, Pablo (2011-10-31)This paper compares the estimated electromagnetic forces due to short circuits in power transformers using two computational models. The first model is based on approximate analytical expressions of the electromagnetic ... -
A tool for the assessment of the electromagnetic forces in power distribution transformers
Da Costa Lopes, Andrey; Sanz Bobi, Miguel Ángel; Rouco Rodríguez, Luis; Palacios Hielscher, Rafael; Flores Losada, Luis; Cirujano Ballesteros, Pablo (Departamento de Ingeniería Eléctrica. Universidade de Vigo (Santiago de Compostela, España), 2010-10-03)This paper compares the estimated electromagnetic forces due to short circuits in power transformers using two computational models. The first model is based on approximate analytical expressions of the electromagnetic ... -
Acceso remoto a ensayos de control en tiempo real basados en Matlab
Palacios Hielscher, Rafael; Rodríguez Pecharromán, Ramón (Sin editorial (Granada, España), 2005-09-13)Este artículo presenta un sistema para acceso remoto por Internet a equipos del Laboratorio de Control de la Escuela Técnica Superior de Ingeniería (ICAI), de la Universidad Pontificia Comillas de Madrid. En este laboratorio ... -
Aircraft-based complexity assessment for radar controllers in the multi-sector planner experiment
Li, Lishuai; Cho, Hongseok; Hansman, R. John; Palacios Hielscher, Rafael (AIAA (Fort Worth, Estados Unidos de América), 2010-09-13) -
Analysis of flight data using clustering techniques for detecting abnormal operations
Li, Lishuai; Das, Santanu; Hansman, R. John; Palacios Hielscher, Rafael; Srivastava, Ashok N. (2015-09-01)The airline industry is moving toward proactive risk management, which aims to identify and mitigate risks before accidents occur. However, existing methods for such efforts are limited. They rely on predefined criteria ... -
Analysis of harassment complaints to detect witness intervention by machine learning and soft computing techniques
Alonso Parra, Marina; Puente Águeda, Cristina; Laguna Pradas, Ana; Palacios Hielscher, Rafael (2021-09-01)This research is aimed to analyze textual descriptions of harassment situations collected anonymously by the Hollaback! project. Hollaback! is an international movement created to end harassment in all of its forms. Its ... -
Analysis of security and privacy issues in wearables for minors
Fúster de la Fuente, Jaime; Solera Cotanilla, Sonia; Pérez Sánchez, Jaime; Vega Barbas, Mario; Palacios Hielscher, Rafael; Álvarez-Campana Fernández-Corredor, Manuel; López López, Gregorio (2023-03-08)The increased use of wearables in recent years has fostered a great technological development in this area, although without the appropriate supervision usability may go first than security. In addition to this, the fact ... -
Analysis of stochastic problem decomposition algorithms in computational grids
Latorre Canteli, Jesús María; Cerisola Lopez De Haro, Santiago; Ramos Galán, Andrés; Palacios Hielscher, Rafael -
Analysis of stochastic problem decomposition algorithms in computational grids
Latorre Canteli, Jesús María; Cerisola Lopez De Haro, Santiago; Ramos Galán, Andrés; Palacios Hielscher, Rafael (2009-02-01)Stochastic programming usually represents uncertainty discretely by means of a scenario tree. This representation leads to an exponential growth of the size of stochastic mathematical problems when better accuracy is needed. ... -
Analysis of the Performance of Benders-based Decomposition Methods for Linear Stochastic Programming on a Grid
Latorre Canteli, Jesús María; Palacios Hielscher, Rafael; Ramos Galán, AndrésLarge-scale stochastic optimization problems can be divided into smaller subproblems using decomposition; however the computational overhead of decomposition methods is not justified except for the reason of adjusting the ... -
Analysis of the performance of benders-based distributed decomposition methods for linear stochastic programming
Latorre Canteli, Jesús María; Palacios Hielscher, Rafael; Ramos Galán, AndrésIn stochastic programming, considering uncertainty might lead to large scale problems. Computational resources might fall short of the requirements for solving these problems, especially concerning memory capacity. ... -
Analytical procedure to obtain internal parameters from performance curves of commercial thermoelectric modules
Palacios Hielscher, Rafael; Arenas Alonso, Antonio; Rodríguez Pecharromán, Ramón; Pagola y de las Heras, Francisco Luis (2009-12-01)Manufacturers of commercial thermoelectric modules provide datasheets of the modules including information and graphs about the performance attained at several working conditions. Details about internal parameters are not ... -
Analyzing mobility patterns of complex chronic patients using wearable activity trackers: a machine learning approach
Polo Molina, Alejandro; Sánchez Ubeda, Eugenio Francisco; Portela González, José; Palacios Hielscher, Rafael; Rodríguez-Morcillo García, Carlos; Muñoz San Roque, Antonio; Álvarez Romero, Celia; Hernández Quiles, CarlosThis study suggests using wearable activity trackers to identify mobility patterns in Chronic Complex Patients (CCP) and investigate their relation with the Barthel Index (BI) for assessing functional decline. CCP are ... -
Análisis de problemas de seguridad y privacidad en wearables usados por menores
Solera Cotanilla, Sonia; Fúster de la Fuente, Jaime; Pérez Sánchez, Jaime; Palacios Hielscher, Rafael; Vega Barbas, Mario; Álvarez-Campana Fernández-Corredor, Manuel; López López, GregorioEl incremento de uso de los wearables en los últimos años ha fomentado un desarrollo tecnológico en este ámbito que ha permitido la evolución de estos dispositivos a lo que actualmente conocemos. El hecho ... -
Análisis térmico del comportamiento de un microprocesador de PC utilizando diferentes sistemas de disipación
Palacios Hielscher, Rafael; Arenas Alonso, Antonio; Vázquez Arias, Jorge -
Anomaly detection in onboard-recorded flight data using cluster analysis
Li, Lishuai; Gariel, Maxime; Hansman, R. John; Palacios Hielscher, Rafael (AIAA; IEEE y AVIONICS (Seattle, Estados Unidos de América), 2011-10-16)A method has been developed to support Flight Operations Quality Assurance (FOQA) by identifying anomalous flights based on onboard-recorded flight data using cluster analysis techniques. Unlike current techniques, the ... -
Anomaly detection via a Gaussian Mixture Model for flight operation and safety monitoring
Li, Lishuai; Hansman, R. John; Palacios Hielscher, Rafael; Welsch, Roy (2016-03-01)Safety is key to civil aviation. To further improve its already respectable safety records, the airline industry is transitioning towards a proactive approach which anticipates and mitigates risks before incidents occur. ...