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Aproximadamente 310 registro(s) hasta el momento: (datos)

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Recurso libre

Contenido de acido 5-cafepoilquínico y cafeína en bebidas de yerba mate (Ilex paraguariensis), The chlorogenic acid and caffeine content of yerba maté (Ilex paraguariensis) beverages
Markowicz Bastos, Deborah H. - Fornari, Ana Claudia - Queiroz, Yara S. de - Manolio Soares, Rosa Aparecida - Torres, Elizabeth A. F. S.

Formato:	Articulo, Comunicacion
Enlaces:	El objetivo de este trabajo fue el de analizar el contenido de cafeína y ácido 5-cafeoilquínico (5-cqa) en bebidas tales como chimarrão, tererê y maté té. La determinación de estos compuestos se realizó por HPLC. Las bebidas a base de…
Fecha:	2008-10-27
Recurso:	Unversidad Nacional de La Plata

Recurso libre

EmotiBlog: a fine-grained annotation schema for labelling subjectivity in the new-textual genres born with the Web 2.0, EmotiBlog: un esquema de anotación detallado para la sujetividad en los nuevos géneros textuales de la Web 2.0
Boldrini, Ester - Balahur Dobrescu, Alexandra - Martínez Barco, Patricio - Montoyo Guijarro, Andrés

Formato:	info:eu-repo/semantics/article
Enlaces:	El crecimiento exponencial de la información subjetiva en el marco de la Web 2.0 ha creado la necesidad de producir herramientas de Procesamiento del Lenguaje Natural que sean capaces de analizar y procesar estos datos para aplicaciones concretas. Estas herramientas…
Fecha:	2010-10-11
Recurso:	RUA Docencia

Recurso libre

Design of a service-oriented architecture for federated systems
Calegari, Daniel - Viera, Marcos - Motz, Regina

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	A Federated System is a collection of independent, cooperative, possibly heterogeneous and autonomous computer systems (usually database systems) which allows sharing all or some of its data. A Service-oriented Architecture is an application architecture whose functionalities are defined as independent…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Improving use case definition using enterprise communication networks
Luzuriaga, Juan Manuel

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Although researchers noted the importance of effective communication among stakeholders, it continues to be a challenge for requirements engineering. Communication can be considered as a management tool since communication allows organisation’s personnel to produce a cohesive enterprise view. In this…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Classifying software requirement prioritization approaches
Martínez Carod, Nadina - Cechich, Alejandra

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Defining software requirements is a complex and difficult process, which often leads to costly project failures. Requirements emerge from a collaborative and interactive negotiation process that involves heterogeneous stakeholders (people involved in an elicitation process such as users, analysts, developers,…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

CCMini: a prototype of certifying compiler based on annotated abstract syntax trees
Bavera, Francisco - Nordio, Martín - Medel, Ricardo - Aguirre, Jorge - Baum, Gabriel Alfredo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Certifying compilers use static information of a program to verify that it complies with certain security properties and to generate certified code. To do so, those compilers translate the source program into an annotated program written in some intermediate language.…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Semantic document indexing in ontology-driven organizational memories
Ale, María Alejandra - Galli, María Rosa - Chiotti, Omar Juan Alfredo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Effective document retrieval using domain knowledge and semantics is one of the major challenges in Information Retrieval. Over the last years, there has been a growing interest in ontologies as an artifact for human knowledge representation and a critical component…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

A UML profile to model classifier refinements
Correa, Natalia - Giandini, Roxana Silvia - Pons, Claudia

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The refinement technique allows us to capture the relationship between specification and implementation in software developments. The precise documentation of the refinement relations hip makes it possible the traceability of the requirements through the refinement steps. Unfortunately, the standard modelling…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Tower generic data processing
Necco, Claudia Mónica - Nuno Olivera, J.

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Many aspects of data processing are functional in nature and can take advantage of recent developments in the area of functional programming and calculi. The work described in this paper is an attempt to contribute to this line of thought,…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

10.

Extending message-oriented middleware
Estevez, Elsa Clara - Janowski, Thomas

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Different types of middleware exist to facilitate the integration of software running on heterogeneous computing platforms. Message Oriented Middleware (MOM), for instance, enables the interaction between heterogeneous applications by exchanging packets of structured data (messages) through communication channels. The core…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

11.

Management model for measurement infrastructure
Battisti, Gerson - Tarouco, Liane M. R. - Granville, Lisandro

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	The evaluation of metric of performance is useful in the evaluation of protocols, in the improvement of applications, in the content choice, among others. The obtaining of these metrics, it continues being a complex task because most of the time…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

12.

Requirements elicitation applied to electronic voting system
Thomas, Pablo Javier - Oliveros, Alejandro

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Nowadays, technology has become the key element to carry out the management, organization and fulfillment of the electoral process. The electoral process should be understood as the actions that entail the making of the electoral roll, citizen identification, the act…
Fecha:	2012-10-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

13.

Precompilation: an alternative approach to provide native generic programming support in C++
Gutson, Daniel F. - Alarcón, Román

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	In C++, Generative Programming (GP) techniques are being used to generate highly customized and optimized products automatically manufactured at compile-time; to provide these functionalities increasing compiling power is required. This work presents an improved compilation model for C++ by adding…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

14.

A software product line experience
Andriano, Natalia Valeria - Kirch, Jorge - Zibecchi, Mariano

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Previous work in software product lines showed an increment of up to 10 times in productivity and product quality [SEI Prod_Line]; because of this, the software product line approach is critical for the success of a development project including a…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

15.

A managerial framework for an electronic government procurement project: complex software projects management fundamentals
Uzal, Roberto - Montejano, Germán Antonio - Riesco, Daniel Eduardo - Uzal, Javier

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	An Electronic Government Procurement (e-GP) project, as most of complex software systems development and implantation, requires sophisticated and strong managerial concepts and skills. So, an effective and consistent managerial framework is needed. Traditional project management models, that propose a series…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

16.

A wrapper&mediator prototype for web data warehouses
Giaudrone, Verónica - Guerra, Marcelo - Vaccaro, Marcelo - Motz, Regina - Marotta, Adriana

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	There is a lot of information published on the Web that can be useful for decision-making. The work reported in this paper focuses on how to extract and integrate this information in order to construct a Data Warehouse that makes…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

17.

Stakeholder selection for business processes support systems in interorganizational environments
Ballejos, Luciana C. - Montagna, Jorge Marcelo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	This work presents a methodology with basic steps to follow before developing Interorganizational Information Systems (IOSs), which constitute the support for the execution of business processes (BPs) in new structural forms made up of various organizations, called Interorganizational Networks (IONs).…
Fecha:	2012-10-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

18.

Software process improvement behavior of small and medium organizations in Argentina
Colla, Pedro E. - Montagna, Jorge Marcelo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Este artículo reporta el trabajo de investigación realizado en base a datos extraídos de la Encuesta Anual realizada por la CESSI durante el año 2007 entre organizaciones dedicadas al desarrollo de Software en Argentina. Si bien la temática de mejora…
Fecha:	2012-10-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

19.

The multi-agent system architecture in SEWASIE
Fillottrani, Pablo Rubén

Formato:	Articulo, Articulo
Enlaces:	We describe the design, implementation and deployment of the multi-level agent-based system architecture developed for the SEWASIE project. The aim of the system is to help the user in querying heterogeneous data sources which are integrated by means of ontologies.…
Fecha:	2008-05-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

20.

Design of a service-oriented architecture for federated systems
Calegari, Daniel - Viera, Marcos - Motz, Regina

Formato:	Articulo, Articulo
Enlaces:	A Federated System is a collection of independent, cooperative, possibly heterogeneous and autonomous computer systems (usually database systems) which allows sharing all or some of its data. A Service-Oriented Architecture is an application architecture whose functionalities are defined as independent…
Fecha:	2008-05-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

21.

Analyzing and Improving Data Quality
Buccella, Agustina - Cechich, Alejandra - Domingo, Gonzalo

Formato:	Articulo, Articulo
Enlaces:	Data quality is a research area strongly investigated during the 90’s. However, few companies in Argentina apply data quality methodologies or tools during the analysis, design or implementation phases of software development process. Developers generally use techniques to design systems…
Fecha:	2008-10-07
Recurso:	Unversidad Nacional de La Plata

Recurso libre

22.

Optimizing the spatial approximation tree from the root
Gómez, Alejandro - Ludueña, Verónica - Reyes, Nora Susana

Formato:	Articulo, Articulo
Enlaces:	Many computational applications need to look for information in a database. Nowadays, the predominance of nonconventional databases makes the similarity search (i.e., searching elements of the database that are "similar" to a given query) becomes a preponderant concept. The Spatial…
Fecha:	2008-10-08
Recurso:	Unversidad Nacional de La Plata

Recurso libre

23.

Proposal of an ontology based web search engine
Deco, Claudia - Bender, Cristina - Ponce, Adrián

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	When users search for information in a web site, sometimes they do not get what they want. Assuming that the scope where the search take place works fine, there are some problems caused by the way the user interact with…
Fecha:	2012-10-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

24.

Semantic Interoperability Middleware – enabling collaborative networks in public sector
Sanchez, Alejandro - Estevez, Elsa Clara - Janowski, Thomas - Ojo, Adegboyega

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Electronic Government initiatives, such as seamless public services delivered at one-stop government portals, require establishing collaborative networks among public- and private-sector organizations. However, semantic interoperability problems emerge as these organizations may differ in the terms and meanings they use to…
Fecha:	2012-10-03
Recurso:	Unversidad Nacional de La Plata

Recurso libre

25.

Temporal validation of extended workflow processes by means Petri Nets with Clocks
Riesco, Daniel Eduardo - Vilallonga, Gabriel Domingo - Montejano, Germán Antonio - Uzal, Roberto - Welch, Daniel - Gallina, Sergio Hilario

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	At present the business processes have temporary requirements within their specifications. Logistics, e-commerce, are examples of these, among others. The time involved in business processes is important regarding the interaction of the actors. The sound of the technology involved in…
Fecha:	2012-10-03
Recurso:	Unversidad Nacional de La Plata

Recurso libre

26.

An integrated improvement framework for sharing assessment lessons learned
Rubio, Diego Martín - Andriano, Natalia Valeria - Ruiz de Mendarozqueta, Alvaro - Bartó, Carlos

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Nowadays, an increasing number of companies are using process improvement models as a mean to improve the quality of their processes and therefore the quality of their products and services. Although various improvement frameworks exist that provide organizations with aids…
Fecha:	2012-10-03
Recurso:	Unversidad Nacional de La Plata

Recurso libre

27.

Driving to a fast IMS feature vector computing
Fernández, Jacqueline - Guerrero, Roberto A. - Miranda, Natalia - Piccoli, Fabiana

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	La creciente cantidad de imágenes transmitidas a través de Internet ha llevado al desarrollo de Sistemas de Minería de Imágenes de propósito general. La performance de un SMI depende en gran medida de una rápida y buena especificación del vector…
Fecha:	2012-10-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

28.

Modern database management VI Edition. Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden Prentice Hall, Upper Saddle River, NJ, 2002
Bertone, Rodolfo Alfredo

Formato:	Articulo, Revision
Enlaces:	This book provides an excellent foundation for the principles of database and data management. It explains some of the more difficult concepts fairly well. The book is meant for an introductory course in database management which is usually required as…
Fecha:	2008-10-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

29.

Developing a PQ monitoring system for assessing power quality and critical areas detection, Desarrollo de un sistema de monitoreo de calidad de potencia para la evaluación de calidad de potencia y la detección de zonas críticas
Romero Miguel ; Universidad Nacional de Colombia - Pardo Ricardo ; Universidad Nacional de Colombia - Gallego Luis ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	This paper outlines the development of a power quality monitoring system. The system is aimed at assessing power quality and detecting critical areas throughout at distribution system. Such system integrates a hardware system and a software processing tool developed in…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

30.

Interethnic partnerships of Western Europeans: between preferences and opportunities, Parejas interétnicas de europeos occidentales: entre la preferencia y la oportunidad
Braun, Michael - Recchi, Ettore

Formato:	info:eu-repo/semantics/article
Enlaces:	Los estudios previos sobre la integración social de los migrantes en sus países de destino, en particular sobre parejas interétnicas, coinciden en dar importancia al mismo conjunto de variables. Este estudio pretende proporcionar una prueba más del valor generalizable de…
Fecha:	2008-10-02
Recurso:	RUA Docencia

Recurso libre

31.

Entropy and coefficient of variation (CV) as tools for assessing power quality, Entropía y coeficiente de variación (CV) como herramientas para evaluar la calidad de la energía
Estrada J. H. ; Universidad Nacional de Colombia - Sede Manizales - Cano-Plata E. A. ; Universidad Nacional de Colombia -Sede Manizales - Younes-Velosa C. ; Universidad Nacional de Colombia - Sede Manizales - Cortés C. L. ; Universidad Nacional de Colombia - Sede Manizales

Formato:	, , ,
Enlaces:	This paper presents several concepts and techniques for quantifying electric signal entropy and variability for assessing power quality, showing their irregularities, such as the electrical sine wave which delivers power to industry and homes. The paper will review these concepts…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

32.

Editor's Notes
Dooly, Melinda; Dept. Did. Ll, Lit i CCSS, Universitat Autònoma de Barcelona

Formato:	, , Editor's Note, ,
Enlaces:	We begin this issue with our invited authors Dr. Annie Pilote, Dr. Marie-Odile Magnan and Dr. Cynthia Groff (...) three articles are selected papers from the Annual Interuniversity Roundtable on Research in Language and Literature Education (...). Comencem aquest volum…
Fecha:	2011-10-06
Recurso:	Bellaterra: Journal of teaching and Learning Language and Literature

Recurso libre

33.

Operational analysis of electric field mills as lightning warning systems in Colombia, Análisis operacional de molinos de campo eléctrico como sistemas de alerta de tormentas eléctricas en Colombia
Aranguren D. ; Universidad Nacional de Colombia, Bogotá - López J. ; Universidad Nacional de Colombia, Medellín - Pérez E. ; Universidad Nacional de Colombia, Medellín - Herrera J. ; Universidad Nacional de Colombia, Medellín - Aragón L. ; Universidad Nacional de Colombia, Bogotá - Torres H. ; Universidad Nacional de Colombia, Bogotá

Formato:	, , ,
Enlaces:	Electrostatic field measurements taken in Bogotá, Colombia, during thunderstorms in November (the rainy season due to inter-tropical confluence zone over central Colombia) were used to study the performance of an isolated electric field sensor and analyse its most important operational…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

34.

Better integrated due to a German partner?: an analysis of differences in the integration of foreigners in intra- and inter-ethnic partnerships in Germany, ¿Mejor integración por tener pareja alemana?: un análisis de las diferencias en la integración de los extranjeros en las parejas intra e interétnicas en Alemania
Rother, Nina

Formato:	info:eu-repo/semantics/article
Enlaces:	Este estudio analiza las diferencias en la integración de extranjeros viviendo en intra e interétnicas parejas en Alemania. La teoría de la distancia social asume que los migrantes que forman parte de una pareja mixta estarán mejor integrados o, al…
Fecha:	2008-10-02
Recurso:	RUA Docencia

Recurso libre

35.

First-year students' conflicts during their construction of an academic identity in English as a foreign language: Implementing Cultural-Historical Activity Theory
Oliva-Girbau, Angels; Dept. Did. Ll, Lit i CCSS, Universitat Autònoma de Barcelona

Formato:	Avaluacions anònimes, Peer-Reviewed Article, Activity Theory, Questionnaires, Evaluaciones anónimas,
Enlaces:	Abstract This paper constructs a theoretical framework that views academic writing from a context-based perspective. The shift from text to context results from implementating the concept of activity system into the academic community, envisioning academia as the sum of the…
Fecha:	2011-10-06
Recurso:	Bellaterra: Journal of teaching and Learning Language and Literature

Recurso libre

36.

Revisión general de las metodologías para el modelado de las incertidumbres en el cálculo del flujo de cargas armónicas, An overview of approaches for modelling uncertainty in harmonic load-flow
Romero A. A. ; IEE-UNSJ - Zini H. C. ; IEE-UNSJ - Ratta G. ; IEE-UNSJ

Formato:	, , ,
Enlaces:	Debido a la creciente utilización de dispositivos basados en electrónica de potencia y de otras cargas de características no lineales, es que la distorsión armónica en las señales de tensión y de corriente es un problema que va en aumento…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

37.

Education and linguistic boundaries in Québec: Student representations and pedagogical reflections from a critical perspective
Pilote, Annie; Dept. Did. Ll, Lit i CCSS, Universitat Autònoma de Barcelona - Magnan, Marie-Odile - Groff, Cynthia

Formato:	Articles convidats, Commissioned, qualitative analysis, interviews, Artículos invitados,
Enlaces:	AbstractRelations between francophones and anglophones in Québec City reflect historical struggles and changing power relations between the groups. Using a constructivist and interactionist approach to identity and ethnicity, we examine the role of English language schools in intergroup relations. We…
Fecha:	2011-10-06
Recurso:	Bellaterra: Journal of teaching and Learning Language and Literature

Recurso libre

38.

Virtual collaboration, ‘perezhivanie’ and teacher learning: A socio-cultural-historical perspective
Antoniadou, Victoria; Dept. Did. Ll, Lit i CCSS, Universitat Autònoma de Barcelona

Formato:	Avaluacions anònimes, Peer-Reviewed Article, Qualitative analysis, Conversation Analysis, Action Relevant Episodes, Evaluaciones anónimas,
Enlaces:	AbstractThis article discusses specific examples of virtually mediated interactions involving two transatlantic groups of student-teachers who engaged in a task-based telecollaborative project for the purposes of a teacher education course. The Vygotskyan framework of learning and development and particularly the…
Fecha:	2011-10-06
Recurso:	Bellaterra: Journal of teaching and Learning Language and Literature

Recurso libre

39.

Editorial, Editorial
Torres Sánchez Horacio ; Universidad Nacional de Colombia - Younes Velosa Camilo ; Universidad Nacional de Colombia - Cano Plata Eduardo Antonio ; Universidad Nacional de Colombia - Pavas Martínez Fabio Andrés ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Para ver la editorial completa, favor descargar el PDF., For viewing the complete editorial, please download in PDF
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

40.

A LEMP Generator-Simulator Circuit, Un circuito generador-simulador de LEMP
Díaz Cadavid Luis Fernando ; Universidad Nacional de Colombia - Cano-Plata Eduardo Antonio ; Universidad Nacional de Colombia - Younes-Velosa Camilo ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	This paper presents a proposal for a LEMP generator-simulator circuit for testing an SDR-detector developed for spectral characterization of lightning, its design and implementation., Este artículo presenta una propuesta de un circuito generador-simulador de LEMP para pruebas de un detector…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

41.

Generalised strategy for implementing the minimum fault reactance based fault location algorithm in real power distribution systems, Estrategia generalizada para la implementación del método de localización de fallas basado en la reactancia mínima de falla en sistemas de distribución reales
Correa-Tapasco E. ; Universidad Tecnológica de Pereira, Colombia - Mora-Flórez J. ; Universidad Tecnológica de Pereira, Colombia - Pérez-Londoño S. ; Universidad Tecnológica de Pereira, Colombia

Formato:	, , ,
Enlaces:	The paper presented here is aimed at proposing a generalised strategy for easily implementing a fault locator in real power distribution systems. The strategy is based on the definition of a fault location method and its successive application along section…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

42.

Hybrid simulation: an active power filter case study, Simulación híbrida: caso de estudio en un filtro activo de potencia
Garcés Y. A. ; Universidad Nacional de Colombia, Sede Manizales - Cano-Plata E. A. ; Universidad Nacional de Colombia, Sede Manizales - Ustariz-Farfan A. J. ; Universidad Nacional de Colombia, Sede Manizales

Formato:	, , ,
Enlaces:	The hybrid simulation concept consisting of a combination of computer simulation and laboratory tests. This approach is a cost effective alternative to physically testing the whole system and allows better understanding of complex coupled systems.This paper describes implementing an active…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

43.

The state of the art and new developments in voltage sag immunity, Estado del arte y nuevos desarrollos en inmunidad frente a huecos de tensión (sags)
Caicedo Joaquín ; Universidad Distrital Francisco José de Caldas - Navarro Felipe ; Universidad Distrital Francisco José de Caldas - Rivas Edwin ; Universidad Distrital Francisco José de Caldas - Santamaría Francisco ; Universidad Distrital Francisco José de Caldas

Formato:	, , ,
Enlaces:	This paper presents the state of the art regarding electrical equipment’s immunity to voltage sags. It deals with immunity analysis and voltage sag generators. An alternative methodology for testing equipment regarding voltage sag is proposed, along with immunity assessment. A…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

44.

Characterising power quality disturbances resulting from current limiting fuse operation, Caracterización de Perturbaciones Eléctricas Causadas por la Operación de Fusibles Limitadores de Corriente
Ortiz S. N. ; Research Group on Electric Power Systems GISEL - Blanco S. J. ; Universidad Industrial de Santander - Ordoñez P. G. ; Universidad Industrial de Santander - Barrera N. V. ; Universidad de Gerona (UdG)

Formato:	, , ,
Enlaces:	This article presents novel and easily implemented tools for characterising electrical disturbances originated by fuse operations. A methodology is described that (with the use of some descriptors) led to identifying electrical disturbances of this kind. The algorithm’s decision thresholds were…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

45.

The effects on radial distribution networks caused by replacing incandescent lamps with compact fluorescent lamps and LEDs, Efectos sobre los circuitos de distribución causados por el reemplazo de lámparas incandescentes con bombillas fluorescentes compactas y LEDs
Blanco Castañeda Ana María ; Tecnische Universität Dresden - Parra Estrella Esperanza ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Compact fluorescent lamps and high-power lightemitting diodes use an electronic device that injects harmonics into distribution networks, thereby altering power quality levels. This paper shows these lamps’ electrical characterisation and the results of a computer simulation of a radial distribution…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

46.

Applying FBD-power theory to analysing effective lighting devices’ impact on power quality and electric grid efficiency, Aplicación de la Teoría de Potencia FBD al análisis del impacto de los dispositivos eficientes de iluminación sobre la Calidad de la Potencia y la Eficiencia de una red eléctrica
Pavas Andrés ; Universidad Nacional de Colombia - Blanco Ana María ; Teknische Universität Dresden - Parra Estrella ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Currently the impact of high efficient lighting devices such as compact fluorescent lamps (CFL) and light emitting diodes (LED) is an important concern for the electrotechnical community. This paper makes a contribution towards determining the impact of these devices on…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

47.

Studying and simulating transformer configuration to improve power quality, Estudio y simulación de las configuraciones de transformadores para el mejoramiento de la calidad de energía
Peña Huaringa Oscar J. ; Universidad Nacional de Ingeniería - Lima

Formato:	, , ,
Enlaces:	This paper presents a study and simulation of transformer configurations to improve power quality; it provides theoretical support based on the expansion of the Fourier series and analysis of symmetrical components. A test system was set up in the laboratory,…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

48.

Power quality problems caused by termites on 138-kV underground cables, Problemas de calidad de energía causados por termitas en cables subterráneos de 138kV
Fuscaldi Romeu ; Power Utility of Minas Gerais (CEMIG) - Silveira Fernando H. ; Department of Electrical Engineering, UFMG - De Conti Alberto ; Department of Electrical Engineering, UFMG - Visacro Silvério ; Department of Electrical Engineering, UFMG

Formato:	, , ,
Enlaces:	This paper discusses problems found in the operation of underground cables in the transmission system of CEMIG, with emphasis on insulation failures caused by termites. This problem has been the source of many scheduled and nonscheduled interruptions in later years,…
Fecha:	2011-10-31
Recurso:	Ingeniería e investigación

Recurso libre

49.

Editorial: Universidad de Investigación, Editorial: A model research university
Hernández Losada Diego Fernando ; Universidad Nacional de Colombia, Bogotá, D.C.

Formato:	, , ,
Enlaces:	Para ver la editorial completa, favor descargar el PDF., To view the complete editorial please unload PDF
Fecha:	2011-12-10
Recurso:	Ingeniería e investigación

Recurso libre

50.

Comportamiento de la interfaz concreto-epoxi-FRP utilizando la teoría de mezclas serie/paralelo, Behaviour of the interface between concrete and FRP using serial/parallel mixing theory
Molina Maritzabel ; Universidad Nacional de Colombia - Cruz Juan José ; Universidad Autónoma de Chiapas - Oller Sergio ; Universidad Politécnica de Cataluña - Barbat Alex H. ; Universidad Politécnica de Cataluña - Gil Lluís ; Universidad Politécnica de Cataluña

Formato:	, , ,
Enlaces:	Diversos estudios experimentales han mostrado que uno de los factores que afectan el comportamiento de estructuras de concreto externamente reforzadas con Fiberglass Reinforced Plastic (FRP, por sus siglas en inglés) es la adherencia entre el concreto y el FRP. En…
Fecha:	2011-12-10
Recurso:	Ingeniería e investigación