Metabuscador

Filtrado por:

Temas

Idiomas

Año

2011 (3)
2010 (1)
2008 (3)
2003 (20)
2002 (13)
2001 (19)
Más...

Aproximadamente 105 registro(s) hasta el momento: (journal)

Mostrar 10 | 50 | 100 resultados por página

Recurso libre

Capital accumulation, trade liberalization, and rising wage inequality: the case of Argentina
Acosta, Pablo - Gasparini, Leonardo

Formato:	Articulo, Documento de trabajo
Enlaces:	Capital accumulation can modify the relative productivity between skilled and unskilled workers, thus leading to changes in the wage structure. In particular, if capital goods are relatively more complementary to skilled workers in the production function (skill-biased technologies), a positive…
Fecha:	2004-04-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Index structures for distributed text databases
Marin Cahiuan, Juan Mauricio

Formato:	Articulo, Articulo
Enlaces:	The Web has became an obiquitous resource for distributed computing making it relevant to investigate new ways of providing efficient access to services available at dedicated sites. Efficiency is an ever-increasing demand which can be only satisfied with the development…
Fecha:	2004-08-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

On improved deformable template matching for polygonal objects
Luo, Jianshu - Tang, Zeying - Lu, Hanqing

Formato:	Articulo, Articulo
Enlaces:	In this paper, an improvement of deformable template matching algorithm for polygonal objects in grayscale images using two-dimensional deformable templates along orthogonal curves is presented. In the process of pre-computing extensions of the deformable template along orthogonal curves, the novel…
Fecha:	2004-08-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Reasoning about protocols using Dijkstra´s calculus
Singh, Awadhesh Kumar - Bandyopadhyay, Anup Kumar

Formato:	Articulo, Articulo
Enlaces:	A mathematical model for the specification and verification of a data link layer protocol is proposed. The weakest precondition calculus, developed by Dijkstra, originally for sequential programs, has been chosen for this purpose. It is demonstrated that the wp-calculus provides…
Fecha:	2004-08-12
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Activation and termination detection on distributed systems
Baraldi, Waldemar A. - Scarpa, Diego - Ponzoni, Ignacio - Ardenghi, Jorge Raúl

Formato:	Articulo, Articulo
Enlaces:	Facing the different approaches to process activation and global termination detection on distributed systems, this paper performs a practical comparison between the mainly opposed centralized and distributed models. Firstly, they were implemented to solve both the activation and termination detection…
Fecha:	2004-08-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

A GRASP algorithm with tree based local search for designing a survivable wide area network backbone
Cancela, Héctor - Robledo, Franco - Rubino, Gerardo

Formato:	Articulo, Articulo
Enlaces:	System survivability is the ability to give service in spite of failures of some of the components. To assure survivability is an important goal when designing a communications network backbone, to ensure that it can resist to failures in the…
Fecha:	2004-08-24
Recurso:	Unversidad Nacional de La Plata

Recurso libre

ALENA
Corbalán, Leonardo C. - Lanzarini, Laura Cristina - De Giusti, Armando Eduardo

Formato:	Articulo, Articulo
Enlaces:	Evolving neural arrays (ENA) have proved to be capable of learning complex behaviors, i.e., problems whose solution requires strategy learning. For this reason, they present many applications in various areas such as robotics and process control. Unlike conventional methods "based…
Fecha:	2004-08-24
Recurso:	Unversidad Nacional de La Plata

Recurso libre

HTSN: a complex workflow model based on colored Petri net
Zhu, Haiping - Li, Peigen - Zhang, Guojun

Formato:	Articulo, Articulo
Enlaces:	Traditional workflow models have obvious shortcomings in describing complex workflows. Such complexity is due not only to the hierarchical property of business process, but also to the complicated dependencies among tasks. In this paper, we first introduce a conceptual task…
Fecha:	2004-11-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

Learning by generation in computer science education
Kerren, Andreas

Formato:	Articulo, Articulo
Enlaces:	The use of generic and generative methods for the development and application of interactive educational software is a relatively unexplored area in industry and education. Advantages of generic and generative techniques are, among other things, the high degree of reusability…
Fecha:	2004-11-24
Recurso:	Unversidad Nacional de La Plata

Recurso libre

10.

Teaching fundamentals of computing theory: a constructivist approach
Chesñevar, Carlos Iván - Maguitman, Ana Gabriela - González, María Paula - Cobo, María Laura

Formato:	Articulo, Articulo
Enlaces:	A Fundamentals of Computing Theory course involves different topics that are core to the Computer Science curricula and whose level of abstraction makes them difficult both to teach and to learn. Such difficulty stems from the complexity of the abstract…
Fecha:	2004-11-24
Recurso:	Unversidad Nacional de La Plata

Recurso libre

11.

Design of distance courses in a web learning environment (WebLIDI)
Sanz, Cecilia Verónica - Zangara, María Alejandra - Gonzalez, Alejandro Héctor - De Giusti, Armando Eduardo - Ibañez, Eduardo

Formato:	Articulo, Articulo
Enlaces:	This paper presents some of the aspects related to the multidisciplinary research process initiated in III LIDI for the development of a learning environment focused on the WEB (WebLIDI). It attempts to gather, in a work group, the technology working…
Fecha:	2004-11-25
Recurso:	Unversidad Nacional de La Plata

Recurso libre

12.

An evolutionary algorithm to track changes of optimum value locations in dynamic environments
Aragón, Victoria S. - Esquivel, Susana Cecilia

Formato:	Articulo, Articulo
Enlaces:	Non-stationary, or dynamic, problems change over time. There exist a variety of forms of dynamism. The concept of dynamic environments in the context of this paper means that the fitness landscape changes during the run of an evolutionary algorithm. Genetic…
Fecha:	2004-11-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

13.

A five-valued logic and a system
Ferreira, Ulisses

Formato:	Articulo, Articulo
Enlaces:	The present article introduces a five-valued logic and a deductive system. Here, the logic presented is a relevant fragment of the @-logic, which is also a space-time logic. These five values correspond to the following semantics: unknown, possibly known but…
Fecha:	2004-11-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

14.

Color image segmentation using multispectral random field texture model & color content features
Hernandez, Orlando J. - Khotanzad, Alireza

Formato:	Articulo, Articulo
Enlaces:	This paper describes a color texture-based image segmentation system. The color texture information is obtained via modeling with the Multispectral Simultaneous Auto Regressive (MSAR) random field model. The general color content characterized by ratios of sample color means is also…
Fecha:	2004-11-29
Recurso:	Unversidad Nacional de La Plata

Recurso libre

15.

Accurate calibration of stereo cameras for machine vision
Li, Liangfu - Feng, Zuren - Feng, Yuanjing

Formato:	Articulo, Articulo
Enlaces:	Camera calibration is an important task for machine vision, whose goal is to obtain the internal and external parameters of each camera. With these parameters, the 3D positions of a scene point, which is identified and matched in two stereo…
Fecha:	2004-11-30
Recurso:	Unversidad Nacional de La Plata

Recurso libre

16.

Carpal-bone feature extraction analysis in skeletal age assessment based on deformable model
Pan, Lin - Zhang, Feng - Yang, Yong - Zheng, Chong-Xun

Formato:	Articulo, Articulo
Enlaces:	Skeletal age assessment is one of the important applications of hand radiography in the area of pediatric radiology. Features analysis of the carpal bones can reveal the important information for skeletal age assessment. The present work in this paper faces…
Fecha:	2004-11-30
Recurso:	Unversidad Nacional de La Plata

Recurso libre

17.

A cryptography method employing a new mathematical paradigm for public keys schemes
Ribeiro, Vinicius Gadis - Weber, Raul Fernando

Formato:	Articulo, Articulo
Enlaces:	blic Keys Schemes usually generate two pairs of keys that bear some mathematical relation-usually, a relation of the field known as Number Theory. Identifying a key from another that is given is a problem of great difficulty. This paper presents…
Fecha:	2004-12-01
Recurso:	Unversidad Nacional de La Plata

Recurso libre

18.

CBS: constraint-based approach for scheduling in bluetooth networks
Yu, Shengsheng - Zhou, Jingli - Jiang, Gang

Formato:	Articulo, Articulo
Enlaces:	In Bluetooth networks, devices are organized into small piconets and large scatternets, and each node acts as the role of master, slave or gateway. Due to dynamic topology changes, different bandwidth available and unpredictable interference of media in Bluetooth networks,…
Fecha:	2004-08-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

19.

Towards a metric suite for OCL expressions expressed within UML/OCL models
Reynoso, Luis A. - Genero Bocco, Marcela - Piattini Velthuis, Mario

Formato:	Articulo, Articulo
Enlaces:	UML models quality is clearly a crucial issue that must be evaluated at the initial stages of object-oriented software development, in order to get software products with better quality. This fact is corroborated by the huge amount of metrics that…
Fecha:	2004-08-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

20.

Integrating defeasible argumentation with fuzzy ART neural networks for pattern classification
Gómez, Sergio Alejandro - Chesñevar, Carlos Iván

Formato:	Articulo, Articulo
Enlaces:	Many classification systems rely on clustering techniques in which a collection of training examples is provided as an input, and a number of clusters c<SUB>1</SUB>,...c<SUB>m</SUB> modelling some concept C results as an output, such that every cluster c<SUB>i</SUB> is labelled…
Fecha:	2004-08-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

21.

Implementing agents for a collaborative online learning environment
Azevedo, Hilton José Silva de - Scalabrin, Edson Emílio - Faria, Marcio de Paula - Manfroi, Fairus

Formato:	Articulo, Articulo
Enlaces:	This paper discusses the main lines used to model intelligent agents that will operate in a Collaborative Online Learning Environment-COLE. The aim of COLE is to evaluate the contribution that Information Technology and Multiagent Systems can bring to the discussion…
Fecha:	2004-11-25
Recurso:	Unversidad Nacional de La Plata

Recurso libre

22.

Knowledge insertion: an efficient approach to reduce search effort in evolutionary scheduling
Pandolfi, Daniel - Lasso, Marta - De San Pedro, María Eugenia - Villagra, A. - Gallard, Raúl Hector

Formato:	Articulo, Articulo
Enlaces:	Evolutionary algorithms (EAs) are merely blind search algorithms, which only make use of the relative fitness of solutions, but completely ignore the nature of the problem. Their performance can be improved by using new multirecombinative approaches, which provide a good…
Fecha:	2004-11-25
Recurso:	Unversidad Nacional de La Plata

Recurso libre

23.

Design and development of a platform for internet-based collaborative product development
Zhang, Kui - Zhou, Jianzhong

Formato:	Articulo, Articulo
Enlaces:	In order to accomplish collaborative product development in the area of engineering, a work platform is needed to support all-sided collaborative work by the different development partners at geographically different locations. The platform is established on the basis of a…
Fecha:	2004-11-26
Recurso:	Unversidad Nacional de La Plata

Recurso libre

24.

Watch IT: The risks and promises of new information technologies. Nicholas C. Burbules, Thomas A. Callister (h) Ediciones Granica S. A., 2001
Gorga, Gladys - Madoz, María Cristina

Formato:	Articulo, Revision
Enlaces:	Descripción completa.
Fecha:	2008-10-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

25.

A criteria to select genetic operators for solving CSP
Riff Rojas, María Cristina

Formato:	Articulo, Articulo
Enlaces:	Our interest is to define evolutionary algorithms to solve Constraint Satisfaction Problems (CSP), which indlude benefits of taditional resolution methods of CSPs as well as inherent characteristics of these kind of problems. In this paper we propose a criterion to…
Fecha:	2004-05-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

26.

Image compression for medical diagnosis using neural networks
Lanzarini, Laura Cristina - Vargas Camacho, María Teresa - Flores Badrán, Amado - De Giusti, Armando Eduardo

Formato:	Articulo, Articulo
Enlaces:	Images compression is a widely studied topic. Conventional situations offer variable compression ratios depending on the image in question and, in general, do not yield good results for images that are rich in tones. This work is an application of…
Fecha:	2004-05-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

27.

A multi-paradigm approach for mobile agents development
Belloni, Edgardo A.

Formato:	Articulo, Articulo
Enlaces:	Mobile agent systems have received important attention in the last years as a new programming paradigm for widely distributed and heterogeneous systems. In this article, a multi-paradigm approach for the development of intelligent mobile agents is presented. It integrates both…
Fecha:	2004-03-30
Recurso:	Unversidad Nacional de La Plata

Recurso libre

28.

Translating fork specifications into logic programs
Baum, Gabriel Alfredo - Aguirre, Nazareno Matías - Arroyo, Marcelo

Formato:	Articulo, Articulo
Enlaces:	In this work a compiler from fork specifications into logic programs is presented. The technique implemented by the compiler consists of transforming a set of fork equations (with some restrictions) into normal logic programs in such a way that the…
Fecha:	2004-03-31
Recurso:	Unversidad Nacional de La Plata

Recurso libre

29.

Image processing with nonseparable multiwavelets
Ruedín, Ana M. C.

Formato:	Articulo, Articulo
Enlaces:	In a general context we introduce image processing with 1-dimensional wavelets and show the diferences with nonseparable 2-dimensional wavelets having quincunx decimation, in the first place, and with balanced nonseparable 2-dimensional multiwavelets, in the second place. All of them are…
Fecha:	2004-04-22
Recurso:	Unversidad Nacional de La Plata

Recurso libre

30.

An algorithm for dynamic reconfiguration of mobile agents
Valente, Marco Tulio - Bigonha Andrade da Silva, Mariza - Bigonha da Silva, Roberto

Formato:	Articulo, Articulo
Enlaces:	In this paper we show an algorithm for dynamic reconfiguration of distributed applications based on the mobile agent model. We also show that the proposed algorithm can be easily implemented in the IPL language, a language with several abstractions for…
Fecha:	2004-03-23
Recurso:	Unversidad Nacional de La Plata

Recurso libre

31.

Wavelet representation of functions defined on tetrahedrical grids
Castro, Silvia - Castro, Liliana - Boscardín, Liliana - De Giusti, Armando

Formato:	Articulo, Articulo
Enlaces:	In this paper, a method for representing scalar functions on volumes is presented. The method is based on wavelets and it can be used for representing volumetric data (geometric or scalar) defifined on non structured grids. The basic contribution is…
Fecha:	2004-02-09
Recurso:	Unversidad Nacional de La Plata

Recurso libre

32.

Custom architectures for fuzzy and neural networks controllers
Acosta, Nelson - Tosini, Marcelo Alejandro

Formato:	Articulo, Articulo
Enlaces:	Standard hardware, dedicated microcontroller or application specific circuits can implement fuzzy logic or neural network controllers. This paper presents efficient architecture approaches to develop controllers using specific circuits. A generator uses several tools that allow translating the initial problem specification…
Fecha:	2004-02-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

33.

Generation of flexible 3D objects
González, Adela

Formato:	Articulo, Articulo
Enlaces:	The objective of this research is to develop a tool for the generation of 3D objects modeled with flexible materials, with visco-elastic or inelastic characteristics, similar to the plasticine. It is desirable to prioritize the simplicity of the interface with…
Fecha:	2004-02-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

34.

Improved automatic discovery of subgoals for options in hierarchical
Kretchmar, R. Matthew - Feil, Todd - Bansal, Rohit

Formato:	Articulo, Articulo
Enlaces:	Options have been shown to be a key step in extending reinforcement learning beyond low-level reactionary systems to higher-level, planning systems. Most of the options research involves hand-crafted options; there has been only very limited work in the automated discovery…
Fecha:	2004-05-17
Recurso:	Unversidad Nacional de La Plata

Recurso libre

35.

Shorter table ATA evaluation of elementary functions in single precision
Bria, Oscar N.

Formato:	Articulo, Articulo
Enlaces:	In this paper a slightly modification is proposed to the original Wong and Gotos ATA method for the computation of elementary functions in IEEE 754 single precision. The identification of a trade-off leads to the proposition of a different chunk…
Fecha:	2004-05-21
Recurso:	Unversidad Nacional de La Plata

Recurso libre

36.

Dynamic tuning of parallel/distributed applications
Morajko, Anna

Formato:	Articulo, Revision
Enlaces:	The thesis addresses the problem of automatic and dynamic tuning of parallel and distributed applications. Our objective is to help developers in the process of improving the application performance. The work presents a whole solution that deals with the issues…
Fecha:	2011-09-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

37.

Parallel computing in local area networks
Tinetti, Fernando Gustavo

Formato:	Articulo, Revision
Enlaces:	In this thesis, parallel computing on installed local area networks (LAN) is focused, analyzing problems and possible solutions taking into account the main factors of computing and communications. More specifically, LAN are characterized as parallel computers in the context of…
Fecha:	2011-09-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

38.

Parallel processing
Naiouf, Marcelo

Formato:	Articulo, Revision
Enlaces:	The growing importance and interest in parallel processing within Computer Sciences are undeniable, and thus make it one of the more influencing areas of this discipline. Several reasons support this fact, such as the increase in the computer power, the…
Fecha:	2011-09-02
Recurso:	Unversidad Nacional de La Plata

Recurso libre

39.

Preserving message integrity in dymamic process migration
Heymann Pignolo, Elisa - Tinetti, Fernando Gustavo - Luque Fadón, Emilio

Formato:	Articulo, Articulo
Enlaces:	Processor and network management have a great impact on the performance of Distributed Memory Parallel Computers. Dynamic Process Migration allows load balancing and communication balancing at execution time. Managing the communications involving the migrating process is one of the problems…
Fecha:	2004-05-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

40.

A high performance core for OSI management agents: implementation, simulation and performance evaluation
Rivalino, Matías Junior

Formato:	Articulo, Articulo
Enlaces:	This article presents a proposal of a multithreaded core for an OSI/ISO management agents including its modeling, simulation and performance evaluation. The proposed model i s compared against another one (unthreaded core) which is the c ommonly adopted model by…
Fecha:	2004-05-11
Recurso:	Unversidad Nacional de La Plata

Recurso libre

41.

Feature extraction for an image retrieving scheme
Fuertes García, José Manuel - Lucena López, Manuel José - Perez de la Blanca Capilla, Nicolás - Fernández Valdivia, Joaquín

Formato:	Articulo, Articulo
Enlaces:	In this paper we present two basic modules whithin the designed scheme for retrieving images of a database from the object colour and shape in the scenes. On the one hand, we desing a new method to detect edges in…
Fecha:	2004-05-12
Recurso:	Unversidad Nacional de La Plata

Recurso libre

42.

JPEG with quadtree adaptive partitioning
Russo, Claudia C. - Ramón, Hugo Dionisio - De Giusti, Armando Eduardo - Flores, Raúl

Formato:	Articulo, Articulo
Enlaces:	In this paper two images compression techniques with loss based on the method used by the compression Standard Joint Photographic Experts Groups (JPEG) and on the Quadtree adaptive partitioning method are presented and compared, and the loss produced studied. The…
Fecha:	2004-05-12
Recurso:	Unversidad Nacional de La Plata

Recurso libre

43.

Parallel recognition and classification of objects
Felice, Rodrigo - Ruscitti, Fernando - Naiouf, Marcelo - De Giusti, Armando Eduardo

Formato:	Articulo, Articulo
Enlaces:	The development of parallel algorithms for an automatic recognition and classification of objects from an industrial line (either production or packaging) is presented. This kind of problem introduces a temporal restriction on images processing, a parallel resolution being therefore required.…
Fecha:	2004-05-12
Recurso:	Unversidad Nacional de La Plata

Recurso libre

44.

Parallel defeasible argumentation
García, Alejandro Javier - Simari, Guillermo Ricardo

Formato:	Articulo, Articulo
Enlaces:	Implicitly exploitable parallelism for Logic Programming has received ample attention. Defeasible Argutmentation is specially apt for this optimizing technique. Defeasible Logic Programming (DLP), which is based on a defeasible argumentation formalism, could take full advantage of this type of parallel…
Fecha:	2004-05-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

45.

Comparative analysis of the method of assignment by classes in GAVaPS
Lanzarini, Laura Cristina - Sanz, Cecilia Verónica - Naiouf, Marcelo - Romero, Fernando

Formato:	Articulo, Articulo
Enlaces:	Three alternatives within the method of assignment by classes are presented for the calculation of individuals lifetime in genetic algorithms with varying population size. (GAVaPS). In the proposed strategy (assignment by classes) individuals are grouped according to their fitness. The…
Fecha:	2004-05-07
Recurso:	Unversidad Nacional de La Plata

Recurso libre

46.

The ant colony metaphor for multiple knapsack problem
Cena, Marcelo Guillermo - Crespo, María Liz - Kavka, Carlos - Leguizamón, Mario Guillermo

Formato:	Articulo, Articulo
Enlaces:	This paper presents an Ant Colony Optimisation (ACO) model for the Multiple Knapsack Problem (MKP). The ACO algorithms, as well as other evolutionary metaphors, are being applied successfully to diverse heavily constrained problems: Travelling Salesman Problem, Quadratic Assignment Problem and…
Fecha:	2004-05-10
Recurso:	Unversidad Nacional de La Plata

Recurso libre

47.

Model evolution and system evolution
Pons, Claudia - Baum, Gabriel Alfredo - Kutsche, Ralf-Detlef

Formato:	Articulo, Articulo
Enlaces:	In this paper we define an evolution mechanism with formal semantics using the metamodeling methodology [Geisler et al.98] based on dynamic logic. A remarkable feature of the metamodeling methodology is the ability to define the relation of intentional and extensional…
Fecha:	2004-04-14
Recurso:	Unversidad Nacional de La Plata

Recurso libre

48.

A genetic approach using direct representation of solution for parallel task scheduling problem
Esquivel, Susana Cecilia - Gatica, Claudia R. - Gallard, Raúl Hector

Formato:	Articulo, Articulo
Enlaces:	Evolutionary computation (EC) has been recently recognized as a research field, which studies a new type of algorithms: Evolutionary Algorithms (EAs). These algorithms process populations of solutions as opposed to most traditional approaches which improve a single solution. All these…
Fecha:	2004-05-05
Recurso:	Unversidad Nacional de La Plata

Recurso libre

49.

A hierarchical triangulation for multiresolution terrain models
Abásolo Guerrero, María José - De Giusti, Armando Eduardo - Blat Gimeno, Josep

Formato:	Articulo, Articulo
Enlaces:	Interactive visualisation of triangulated terrain surfaces is still a problem for virtual reality systems. A polygonal model of very large terrain data requires a large number of triangles. The main problems are the representation rendering efficiency and the transmission over…
Fecha:	2004-05-06
Recurso:	Unversidad Nacional de La Plata

Recurso libre

50.

Crowding under diverse distance criteria for niche formation in multimodal optimization
Fernandez, Natalia - Alfonso, Hugo - Gallard, Raúl Hector

Formato:	Articulo, Articulo
Enlaces:	Niche formation allows evolutionary algorithms to be used when the location and maintenance of multiple solutions appertaining to diverse areas of the phenotypic space is required. Consequently the application field can be extended to multiobjective optimization, simulation of complex systems…
Fecha:	2004-05-06
Recurso:	Unversidad Nacional de La Plata