http://sedici.unlp.edu.ar:80/handle/10915/182955 Fri, 13 Nov 2026 04:23:32 GMT 2026-11-13T04:23:32Z http://sedici.unlp.edu.ar:80/handle/10915/185803 Objeto de conferencia Concurso de Trabajos Estudiantiles (EST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) La representación de escenas tridimensionales por computadora (o rendering) en tiempo real está limitada por el poder de procesamiento que se encuentre disponible y la cantidad de elementos que se deban procesar y mostrar. A medida que una escena crece en complejidad, y resulta imposible incrementar el poder de procesamiento disponible, se debe optar por reducir la cantidad de elementos a procesar y/o a mostrar. Existen en la actualidad una diversidad de algoritmos para visualizar escenas complejas en tiempo real, pero son generalmente muy específicos y resultan incompatibles entre sí. Sin embargo todos ellos cumplen con una regla básica: "Se debe minimizar el tiempo de procesamiento de los elementos menos significativos, y a su vez maximizar el detalle en las partes que así lo requieran". Cada uno de estos algoritmos que se presentan posee sus ventajas y desventajas, dependiendo del tipo de escena que se desee mostrar. Es por ello que, utilizando técnicas de programación orientada a objetos, se busca lograr una armónica combinación de ellos, aprovechando así las ventajas de cada uno, y dejando abierta la puerta a la implementación futura de nuevos algoritmos. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185803 2002-01-01T00:00:00Z La representación de escenas tridimensionales por computadora (o rendering) en tiempo real está limitada por el poder de procesamiento que se encuentre disponible y la cantidad de elementos que se deban procesar y mostrar. A medida que una escena crece en complejidad, y resulta imposible incrementar el poder de procesamiento disponible, se debe optar por reducir la cantidad de elementos a procesar y/o a mostrar. Existen en la actualidad una diversidad de algoritmos para visualizar escenas complejas en tiempo real, pero son generalmente muy específicos y resultan incompatibles entre sí. Sin embargo todos ellos cumplen con una regla básica: "Se debe minimizar el tiempo de procesamiento de los elementos menos significativos, y a su vez maximizar el detalle en las partes que así lo requieran". Cada uno de estos algoritmos que se presentan posee sus ventajas y desventajas, dependiendo del tipo de escena que se desee mostrar. Es por ello que, utilizando técnicas de programación orientada a objetos, se busca lograr una armónica combinación de ellos, aprovechando así las ventajas de cada uno, y dejando abierta la puerta a la implementación futura de nuevos algoritmos. http://sedici.unlp.edu.ar:80/handle/10915/185800 Objeto de conferencia Concurso de Trabajos Estudiantiles (EST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Sartoris is a minimal, portable microkernel. It provides direct support for the creation and destruction of tasks and threads, and inter-task communication mechanisms (message queues and shared memory). However, it attempts to be as policy-neutral as possible, providing a high degree of freedom to the operating system designer. In this article we discuss design issues and implementation strategies for the x86 family of processors. Finally, we describe a small Sartoris-based operating system, that was created to test the microkernel. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185800 2002-01-01T00:00:00Z Sartoris is a minimal, portable microkernel. It provides direct support for the creation and destruction of tasks and threads, and inter-task communication mechanisms (message queues and shared memory). However, it attempts to be as policy-neutral as possible, providing a high degree of freedom to the operating system designer. In this article we discuss design issues and implementation strategies for the x86 family of processors. Finally, we describe a small Sartoris-based operating system, that was created to test the microkernel. http://sedici.unlp.edu.ar:80/handle/10915/185798 Objeto de conferencia Argentine Symposium on Computing Technology (AST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) This paper addresses a performance analysis of the principal algorithm for passive location target detection. This algorithm is based on maximum likelihood estimation. Finally a estimator accuracy comparison is done as a function of the number of sensors and measurements per sensor. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185798 2002-01-01T00:00:00Z This paper addresses a performance analysis of the principal algorithm for passive location target detection. This algorithm is based on maximum likelihood estimation. Finally a estimator accuracy comparison is done as a function of the number of sensors and measurements per sensor. http://sedici.unlp.edu.ar:80/handle/10915/185796 Objeto de conferencia Argentine Symposium on Computing Technology (AST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Se presenta un algoritmo paralelo para la simulación de procesos de crecimiento fractal, tales como los procesos de electrodeposición. El algoritmo propuesto se organiza en forma análoga a una línea de montaje en la que los datos se mueven de una etapa a la siguiente a medida que progresan en la simulación. Se logra mantener un alto grado de utilización de los procesadores, al distribuir las regiones del dominio más frecuentemente utilizadas en forma equitativa entre los procesos correspondientes. Utilizando la biblioteca de pasaje de mensajes MPI bajo sistema operativo Linux se realizaron simulaciones sobre un cluster de 16 procesadores. Considerando de 1 a 4 procesos se midieron excelentes niveles de aceleración de hasta un 94% del valor máximo teórico posible. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185796 2002-01-01T00:00:00Z Se presenta un algoritmo paralelo para la simulación de procesos de crecimiento fractal, tales como los procesos de electrodeposición. El algoritmo propuesto se organiza en forma análoga a una línea de montaje en la que los datos se mueven de una etapa a la siguiente a medida que progresan en la simulación. Se logra mantener un alto grado de utilización de los procesadores, al distribuir las regiones del dominio más frecuentemente utilizadas en forma equitativa entre los procesos correspondientes. Utilizando la biblioteca de pasaje de mensajes MPI bajo sistema operativo Linux se realizaron simulaciones sobre un cluster de 16 procesadores. Considerando de 1 a 4 procesos se midieron excelentes niveles de aceleración de hasta un 94% del valor máximo teórico posible. http://sedici.unlp.edu.ar:80/handle/10915/185790 Objeto de conferencia Argentine Symposium on Computing Technology (AST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Motion Analysis and Estimation is a very important application of image processing to the study of physical phenomena. This paper describes a deterministic least-squares based algorithm for the estimation of an affine motion model. Advantages and drawbacks of the algorithm are discussed and future refinements are proposed. Simulations with both synthetic and real images are shown to support the technique described. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185790 2002-01-01T00:00:00Z Motion Analysis and Estimation is a very important application of image processing to the study of physical phenomena. This paper describes a deterministic least-squares based algorithm for the estimation of an affine motion model. Advantages and drawbacks of the algorithm are discussed and future refinements are proposed. Simulations with both synthetic and real images are shown to support the technique described. http://sedici.unlp.edu.ar:80/handle/10915/185599 Objeto de conferencia Simposio Argentino de Inteligencia Artificial (ASAI 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Raising goats is a strong component of regional economies and a main activity of little farmers in Argentina. Knowing the diet is fundamental to correct nutritional lacks resulting from grazing native species, as it will help to design management strategies both for the native forage resource and for the nutritional state of the animal. This fact has a preponderant relevance when goat production is done at natural areas. Microhistology is one of the more frequently used methodology to determine the botanical composition of herbivorous diet. The specialist working at a microscope, according to his training and experience, can identify the species taken by the animal and to which those cells belong. Neural network approaches are suited for recognition problems, this article presents a backpropagation neural network initially trained to identify the four most significant vegetal species found in goat diet that graze freely in the Semiarid Chaco of North-West Argentina. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185599 2002-01-01T00:00:00Z Raising goats is a strong component of regional economies and a main activity of little farmers in Argentina. Knowing the diet is fundamental to correct nutritional lacks resulting from grazing native species, as it will help to design management strategies both for the native forage resource and for the nutritional state of the animal. This fact has a preponderant relevance when goat production is done at natural areas. Microhistology is one of the more frequently used methodology to determine the botanical composition of herbivorous diet. The specialist working at a microscope, according to his training and experience, can identify the species taken by the animal and to which those cells belong. Neural network approaches are suited for recognition problems, this article presents a backpropagation neural network initially trained to identify the four most significant vegetal species found in goat diet that graze freely in the Semiarid Chaco of North-West Argentina. http://sedici.unlp.edu.ar:80/handle/10915/185598 Objeto de conferencia Simposio Argentino de Inteligencia Artificial (ASAI 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) One of the main concerns in the simulation of adaptive behaviors is the study of the complexity of the systems. These studies are carried out through the construction of bottom-up, decentralized models. In this work, we present a decentralized model to study the Vertical Cultural Transmission (VCT), i.e., information transmission from parents to children, as a catalytic factor over the interaction between individual learning and population evolution. Our model is based on the incorporation of advice, in the form of suggestions, as a way of information transmission between agents. An evolutionary computational technique called classifier systems is used as the mechanism for individual learning. In particular, a recent variant based on the accuracy of the prediction made by the rules, called XCS, is applied. In order to control the environmental complexity we adopt the Latent Energy Environment model (LEE). Finally, experimental results showing that vertical cultural transmission does not improve the adaptation of the populations to the described environment are presented. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185598 2002-01-01T00:00:00Z One of the main concerns in the simulation of adaptive behaviors is the study of the complexity of the systems. These studies are carried out through the construction of bottom-up, decentralized models. In this work, we present a decentralized model to study the Vertical Cultural Transmission (VCT), i.e., information transmission from parents to children, as a catalytic factor over the interaction between individual learning and population evolution. Our model is based on the incorporation of advice, in the form of suggestions, as a way of information transmission between agents. An evolutionary computational technique called classifier systems is used as the mechanism for individual learning. In particular, a recent variant based on the accuracy of the prediction made by the rules, called XCS, is applied. In order to control the environmental complexity we adopt the Latent Energy Environment model (LEE). Finally, experimental results showing that vertical cultural transmission does not improve the adaptation of the populations to the described environment are presented. http://sedici.unlp.edu.ar:80/handle/10915/185591 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Nowadays, web applications have evolved into complex software systems where a large number of potential users can accede. Considering navigation as one of the emergent features of web applications, it is necessary to treat it in an adequate way providing the mechanisms to allow for reusing navigational specifications. This paper presents an 00 approach to capture properly the navigational semantics in order to use the navigational specialization as a tool for extending and reusing navigation characteristics and requirements. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185591 2002-01-01T00:00:00Z Nowadays, web applications have evolved into complex software systems where a large number of potential users can accede. Considering navigation as one of the emergent features of web applications, it is necessary to treat it in an adequate way providing the mechanisms to allow for reusing navigational specifications. This paper presents an 00 approach to capture properly the navigational semantics in order to use the navigational specialization as a tool for extending and reusing navigation characteristics and requirements. http://sedici.unlp.edu.ar:80/handle/10915/185588 Objeto de conferencia Argentine Workshop on Theoretical Computer Science (WAIT 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) We present a deformation technique which allows us to determine the number of real solutions of certain specific polynomial equation system. We apply this deformation technique in order to determine the number of stationary solutions of the semidiscretization of certain parabolic differential equations. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185588 2002-01-01T00:00:00Z We present a deformation technique which allows us to determine the number of real solutions of certain specific polynomial equation system. We apply this deformation technique in order to determine the number of stationary solutions of the semidiscretization of certain parabolic differential equations. http://sedici.unlp.edu.ar:80/handle/10915/185378 Objeto de conferencia Argentine Symposium on Computing Technology (AST 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) In this work we construct a process with power law of fractional arder by means of sorne known theorems from harmonic analysis and rather simple probability theory results. This construction is appropriate for numerical simulations, it also provides a relation between these processes and certain type of linear operators which act on LP spaces. This result is very important on its own, because it enables us to construct a process with ex: ∝ 1/lωl ᵝ decay without using the more complicated theory of Itó integration. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/185378 2002-01-01T00:00:00Z In this work we construct a process with power law of fractional arder by means of sorne known theorems from harmonic analysis and rather simple probability theory results. This construction is appropriate for numerical simulations, it also provides a relation between these processes and certain type of linear operators which act on LP spaces. This result is very important on its own, because it enables us to construct a process with ex: ∝ 1/lωl ᵝ decay without using the more complicated theory of Itó integration. http://sedici.unlp.edu.ar:80/handle/10915/184193 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) This paper introduces the Campus Virtual Notredame (CVN) e-learning environment, a multi-campus schema supporting the development of programs for different institutions. CVN handles both academic and administrative tasks. It also provides statistics of usage, over standard periods of time, with the help of a graphical representation tool. The objective is to model the behavior of the agents in the virtual e-learning environment and use the statistics and tool to help to optimize the contents of the campus. The data collected would also allow to plot the path the users follow in the campus pages (called navigation graph). Although further research is needed we believe that the metrics can be correlated with the academic performance of students. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184193 2002-01-01T00:00:00Z This paper introduces the Campus Virtual Notredame (CVN) e-learning environment, a multi-campus schema supporting the development of programs for different institutions. CVN handles both academic and administrative tasks. It also provides statistics of usage, over standard periods of time, with the help of a graphical representation tool. The objective is to model the behavior of the agents in the virtual e-learning environment and use the statistics and tool to help to optimize the contents of the campus. The data collected would also allow to plot the path the users follow in the campus pages (called navigation graph). Although further research is needed we believe that the metrics can be correlated with the academic performance of students. http://sedici.unlp.edu.ar:80/handle/10915/184192 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Tutorial Goal: The goal of this workshop is to present methods and tools for delivering and controlling educational contents trough Internet. We will present Quilmes University Notredame Virtual Campus (CVN). Design tools for classes, activities and evaluations will be discussed and worked on. A model based on process nets for academic and administrative management will be presented. Participants will use the tools and methods on a simulated class based environment. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184192 2002-01-01T00:00:00Z Tutorial Goal: The goal of this workshop is to present methods and tools for delivering and controlling educational contents trough Internet. We will present Quilmes University Notredame Virtual Campus (CVN). Design tools for classes, activities and evaluations will be discussed and worked on. A model based on process nets for academic and administrative management will be presented. Participants will use the tools and methods on a simulated class based environment. http://sedici.unlp.edu.ar:80/handle/10915/184191 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Tutorial Goal: Nowadays, due to the globalisation of the world's economy, more and more companies are migrating their corporate systems to Web-based platforms. In such a context, there is a significant demand for Web applications. From the Software Engineering point of view, Web-based applications have specific characteristics that must be handled in the development process. For this reason, it is necessary to do some adjustments in existing software development processes in order to give a better support for the development of these applications. Aiming the solution of this problem, this tutorial presents a proposal for extending the Rational Unified Process (RUP) in order to produce a better Analysis and Design Model for this kind of applications. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184191 2002-01-01T00:00:00Z Tutorial Goal: Nowadays, due to the globalisation of the world's economy, more and more companies are migrating their corporate systems to Web-based platforms. In such a context, there is a significant demand for Web applications. From the Software Engineering point of view, Web-based applications have specific characteristics that must be handled in the development process. For this reason, it is necessary to do some adjustments in existing software development processes in order to give a better support for the development of these applications. Aiming the solution of this problem, this tutorial presents a proposal for extending the Rational Unified Process (RUP) in order to produce a better Analysis and Design Model for this kind of applications. http://sedici.unlp.edu.ar:80/handle/10915/184189 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Tutorial Goal: To build a correct software product in a Web environment, it is necessary to represent in a precise way the user requirements. This process of user requirements elicitation must generate a Conceptual Schema where all these aspects -including navigation and presentation- must be properly captured. As a consequence, a Conceptual Schema for a Web Application must include in its expressiveness new conceptual primitives specifically designed to specify web characteristics that are no present in the conventional conceptual modelling approaches. These conceptual patterns will be introduced in this tutorial. Furthermore, how to use them in a modern software production process will be shown, using well-known, widely-used notations as UML - properly extended for specification of Web Applications -, and applying the ideas to a practical case of study. Finally, how to guide the process of converting the conceptual patterns into their corresponding final software representations will be analysed, to show how to go from the problem space to the solution space in a way as automated as possible. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184189 2002-01-01T00:00:00Z Tutorial Goal: To build a correct software product in a Web environment, it is necessary to represent in a precise way the user requirements. This process of user requirements elicitation must generate a Conceptual Schema where all these aspects -including navigation and presentation- must be properly captured. As a consequence, a Conceptual Schema for a Web Application must include in its expressiveness new conceptual primitives specifically designed to specify web characteristics that are no present in the conventional conceptual modelling approaches. These conceptual patterns will be introduced in this tutorial. Furthermore, how to use them in a modern software production process will be shown, using well-known, widely-used notations as UML - properly extended for specification of Web Applications -, and applying the ideas to a practical case of study. Finally, how to guide the process of converting the conceptual patterns into their corresponding final software representations will be analysed, to show how to go from the problem space to the solution space in a way as automated as possible. http://sedici.unlp.edu.ar:80/handle/10915/184188 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Tutorial Goal: The aim of this tutorial consists on introducing some concepts to attribute and metric such as theory of representation, empirical and numerical domains, scale type and unit, amongst others, in order to specify a group of Web metrics useful to assess Reliability, Efficiency and Usability. In addition, manual and automatic metrics from the data collection point of view will be addressed. Ultimately, it will be analysed a set of evaluation strategies and methodologies, for different assessment purposes considering Web sites and applications (WebApps). Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184188 2002-01-01T00:00:00Z Tutorial Goal: The aim of this tutorial consists on introducing some concepts to attribute and metric such as theory of representation, empirical and numerical domains, scale type and unit, amongst others, in order to specify a group of Web metrics useful to assess Reliability, Efficiency and Usability. In addition, manual and automatic metrics from the data collection point of view will be addressed. Ultimately, it will be analysed a set of evaluation strategies and methodologies, for different assessment purposes considering Web sites and applications (WebApps). http://sedici.unlp.edu.ar:80/handle/10915/184182 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) SQ-Met is a project whose aim is the Internet applications Quality Assurance by means of a validation methodology for them. An innovating aspect as regards this project is that it provides a complete validation method which is suited for all the different categories of web aplications. That is to say, starting from a classification of those applications, we intend to provide a validation method which stresses the specific requirements for each category and which takes into account not only the procedure of testing to be followed (steps, tools and test cases), but also the gathering of a set of quality measures for web applications that guarantee the fulfilment of the above mentioned requirements. In this article we give a rundown of the activities that have been planned as a part of the project as well as its situation up to now. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184182 2002-01-01T00:00:00Z SQ-Met is a project whose aim is the Internet applications Quality Assurance by means of a validation methodology for them. An innovating aspect as regards this project is that it provides a complete validation method which is suited for all the different categories of web aplications. That is to say, starting from a classification of those applications, we intend to provide a validation method which stresses the specific requirements for each category and which takes into account not only the procedure of testing to be followed (steps, tools and test cases), but also the gathering of a set of quality measures for web applications that guarantee the fulfilment of the above mentioned requirements. In this article we give a rundown of the activities that have been planned as a part of the project as well as its situation up to now. http://sedici.unlp.edu.ar:80/handle/10915/184180 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Education involves a continuous process of exploration, acquisition, organization, integration and delivery of information and knowledge. In recent years, Web-based teaching and learning sites and applications (also called e-learning sites and applications) have exponentially started to grow, being a central phenomenon for the industry and education fields. Key factors for the present and future success of these applications and organizations are, on one hand, the fulfillment of technological standards for learning environments (e.g., IEEE, IMS, ISO standards, among others), and, on the other hand, the utilization of well-defined development processes and the production of required quality. One of our current concerns is the assessment of the quality of e-learning sites and applications. In this paper a taxonomy of Web-based Instructional Systems (WbIS), and ultimately the quality requirements for the Functionality characteristic are thoroughly described, regarding an intentional audience. An evaluation case study for this domain, using the WebQEM (Quality Evaluation Methodology) strategy is currently being run. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184180 2002-01-01T00:00:00Z Education involves a continuous process of exploration, acquisition, organization, integration and delivery of information and knowledge. In recent years, Web-based teaching and learning sites and applications (also called e-learning sites and applications) have exponentially started to grow, being a central phenomenon for the industry and education fields. Key factors for the present and future success of these applications and organizations are, on one hand, the fulfillment of technological standards for learning environments (e.g., IEEE, IMS, ISO standards, among others), and, on the other hand, the utilization of well-defined development processes and the production of required quality. One of our current concerns is the assessment of the quality of e-learning sites and applications. In this paper a taxonomy of Web-based Instructional Systems (WbIS), and ultimately the quality requirements for the Functionality characteristic are thoroughly described, regarding an intentional audience. An evaluation case study for this domain, using the WebQEM (Quality Evaluation Methodology) strategy is currently being run. http://sedici.unlp.edu.ar:80/handle/10915/184178 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) A web site of quiz games has been developed, which incorporates some advances in comparison with most of the known web sites of the same kind. Registered users can play in two different types of single games, in one of them the system allows the player to select the topic of the question. There is also a group game option which deals with several topics. The way in which the system treats each player depends on his level, which is dinamically assigned to him according to his scores. There are also many other posibilities such as record management, rankings, single games management (saving, continuing and deleting games) implemented in the system. It must be emphasized the warnings and expulsions philosofy which punishes those players booked in a group game who do not play propperly . Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184178 2002-01-01T00:00:00Z A web site of quiz games has been developed, which incorporates some advances in comparison with most of the known web sites of the same kind. Registered users can play in two different types of single games, in one of them the system allows the player to select the topic of the question. There is also a group game option which deals with several topics. The way in which the system treats each player depends on his level, which is dinamically assigned to him according to his scores. There are also many other posibilities such as record management, rankings, single games management (saving, continuing and deleting games) implemented in the system. It must be emphasized the warnings and expulsions philosofy which punishes those players booked in a group game who do not play propperly . http://sedici.unlp.edu.ar:80/handle/10915/184176 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) We are going to introduce a new system to help the designer to build up a web site more usable. Before that, we made a simple introduction of what is the usability and how can it be measure. Then we evaluated the different existing tools to measure the usability and we considered the advantage and disadvantages of those systems to make our system more powerfull. We show in the following pages how our system works and the improvements that it has. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184176 2002-01-01T00:00:00Z We are going to introduce a new system to help the designer to build up a web site more usable. Before that, we made a simple introduction of what is the usability and how can it be measure. Then we evaluated the different existing tools to measure the usability and we considered the advantage and disadvantages of those systems to make our system more powerfull. We show in the following pages how our system works and the improvements that it has. http://sedici.unlp.edu.ar:80/handle/10915/184175 Objeto de conferencia Ibero-American Conference on Web Engineering (ICWE 2002) - JAIIO 31 (Santa Fe, 9 al 13 de septiembre de 2002) Abstract. In this paper, we propose and evaluate a model of defining and distributing priorities among the different Web connections, using the JVM (Java Virtual Machine). We propose a QoS hybrid method with specific priorities distribution policy by overcoming the limitations of IP address and requested content type methods. It is shown that is possible obtain some benefits by providing a relative notion of QoS for a web-based service with JVM and without modifications within Kernel structures of the operating system. The QoS hybrid method can also be used to prevent Deny of Service. Tue, 01 Jan 2002 00:00:00 GMT http://sedici.unlp.edu.ar:80/handle/10915/184175 2002-01-01T00:00:00Z Abstract. In this paper, we propose and evaluate a model of defining and distributing priorities among the different Web connections, using the JVM (Java Virtual Machine). We propose a QoS hybrid method with specific priorities distribution policy by overcoming the limitations of IP address and requested content type methods. It is shown that is possible obtain some benefits by providing a relative notion of QoS for a web-based service with JVM and without modifications within Kernel structures of the operating system. The QoS hybrid method can also be used to prevent Deny of Service.