We present the preliminary design of a programming model for building reliable systems with distributed state from collections of potentially unreliable components. Our transactor model provides...
Asynchronous Genetic Search for Scientific Modeling on Large-Scale Heterogeneous Environments (2009)
Travis Desell, Boleslaw Szymanski, Carlos Varela
Use of large-scale heterogeneous computing environments such as computational grids and the Internet has become of high interest to scientific researchers. This is because the increasing complexity...
Asynchronous Genetic Search for Scientific Modeling on Large-Scale Heterogeneous Environments (2008)
Travis Desell, Boleslaw Szymanski, Carlos Varela
Use of large-scale heterogeneous computing environments such as computational grids and the Internet has become of high interest to scientific researchers. This is because the increasing complexity...
The Effects of Heterogeneity on Asynchronous Panmictic Genetic Search (2008)
Travis Desell, Boleslaw Szymanski, Carlos Varela
Abstract. Research scientists increasingly turn to large-scale heterogeneous environments such as computational grids and the Internet based facilities to satisfy their rapidly growing computational...
Cole, Nathan, Newberg, Heidi Jo, Magdon-Ismail, Malik, Desell, Travis, Dawsey, Kristopher, Hayashi, Warren, ...
We present a maximum likelihood method for determining the spatial properties of tidal debris and of the Galactic spheroid. With this method we characterize Sagittarius debris using stars with the...
Carlos Varela, Carlos Abalde, Laura Castro, Jose Gulías, Multiagent Systems
Multi-agent systems are a kind of concurrent distributed systems. In this work, some guidelines on how to create multi-agent systems using Erlang are presented. The modelled system supports...
Abstract Load Balancing of Autonomous Actors over Dynamic Networks (2008)
Travis Desell, Kaoutar El Maghraoui, Carlos Varela
The Internet is constantly growing as a ubiquitous platform for high-performance distributed computing. In this paper, we propose a new software framework for distributed computing over large scale...
Solving Busy Beaver Problem using Farmer/Worker Scheme in the context of Worldwide Computer (2008)
Boleslaw Szymanski, Bram Van Heuveln, Carlos Varela, Kyle Ross, Owen Kellett, Selmer Bringsjord, ...
In this paper we present the aspects of solving complex problems using Worldwide Computing based distributed approach. The Busy Beaver Problem of distributed Turing Machine emulation is considered as...
Bachelor Thesis: „Security Aspects of Digital Actors“ (2008)
Ayse Morali, Fachgebiet Wirtschaftsinformatik I, Prof Dr, Erich Ortner, ...
Online computations are getting more and more embedded into the daily life of people, in particular, they have practical applications in electronic commerce. In the cyber world, mobile codes interact...
The Effects of Heterogeneity on Asynchronous Panmictic Genetic Search (2008)
Boleslaw K. Szymanski, Travis Desell, Carlos Varela
Abstract. Research scientists increasingly turn to large-scale heterogeneous environments such as computational grids and the Internet based facilities to satisfy their rapidly growing computational...
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ARMISTICE: An Experience Developing Management Software with Erlang ∗ ABSTRACT (2007)
David Cabrero, Carlos Abalde, Carlos Varela, Laura Castro
In this paper, some experiences of using the concurrent functional language Erlang to implement a classical vertical application, a risk management information system, are presented. Due to the...
Distributed and generic maximum likelihood evaluation (2007)
Travis Desell, Nathan Cole, Malik Magdon-ismail, Heidi Newberg, Boleslaw Szymanski, Carlos Varela
This paper presents GMLE, a generic and distributed framework for maximum likelihood evaluation. GMLE is currently being applied to astroinformatics for determining the shape of star streams in the...
Distributed and generic maximum likelihood evaluation (2007)
Travis Desell, Nathan Cole, Malik Magdon-ismail, Heidi Newberg, Boleslaw Szymanski, Carlos Varela
This paper presents GMLE 1, a generic and distributed framework for maximum likelihood evaluation. GMLE is currently being applied to astroinformatics for determining the shape of star streams in the...
Pérez-Rosado, Pedro (realización), Rosado González, Lilian (guión), Llorens, Miguel (fotografía), Ibáñez, Vicente (montaje), Montesinos, Rafael (montaje), Varela, Carlos (música), ...
También se conoce como Agua con sal (debajo de las piedras)
Jason Laporte, Travis Desell, Carlos Varela
Visualization aids developers in conceptual understanding, testing, and debugging of distributed systems. Many of these systems, due to their complexity, are programmed using high-level abstractions...
An architecture for reconfigurable iterative MPI applications in dynamic environments (2005)
Kaoutar El Maghraoui, Boleslaw K. Szymanski, Carlos Varela
Abstract. With the proliferation of large scale dynamic execution environments such as grids, the need for providing efficient and scalable application adaptation strategies for long running parallel...
An Architecture for Reconfigurable Iterative MPI Applications in Dynamic Environments (2005)
Kaoutar El Maghraoui, Boleslaw K. Szymanski, Carlos Varela
With the proliferation of large scale dynamic execution environments such as grids, the need for providing efficient and scalable application adaptation strategies for long running parallel and...
Dynamically reconfigurable scientific computing on large-scale heterogeneous grids (2003)
Boleslaw Szymanski, Carlos Varela, John Cummings, Jim Napolitano
Abstract. Many scientific applications require computational capabilities not easily supported by current computing environments. We propose a scalable computing environment based on autonomous...
Adaptive computation over dynamic and heterogeneous networks (2003)
Kaoutar El Maghraoui, Joseph E. Flaherty, Boleslaw K. Szymanski, James D, Carlos Varela
Abstract. Over the last two decades, efficient message passing libraries have been developed for parallel scientific computation. Concurrently, programming languages have been created supporting...
Adaptive computation over dynamic and heterogeneous networks (2003)
Kaoutar El Maghraoui, Joseph E. Flaherty, Boleslaw K. Szymanski, James D, Carlos Varela
Abstract. Over the last two decades, efficient message passing libraries have been developed for parallel scientific computation. Concurrently, programming languages have been created supporting...
Dynamically Reconfigurable Scientific Computing on Large-Scale Heterogeneous Grids (2003)
Boleslaw Szymanski, Carlos Varela, John Cummings, Jim Napolitano
Many scientific applications require computational capabilities not easily supported by current computing environments. We propose a scalable computing environment based on autonomous actors. In this...
Adaptive computation over dynamic and heterogeneous networks (2003)
Kaoutar El Maghraoui, Joseph E. Flaherty, Boleslaw K. Szymanski, James D, Carlos Varela
Abstract. Over the last two decades, efficient message passing libraries have been developed for parallel scientific computation. Concurrently, programming languages have been created supporting...
OverView — dynamic visualization of java-based highly reconfigurable distributed systems (2003)
Harihar Narasimha Iyer, Abe Stephens, Travis Desell, Carlos Varela
Online visualization enables developers to test, debug, and monitor the behavior of distributed systems, while they are running. While important in software development, online visualization of...
Programming Dynamically Reconfigurable Open Systems with SALSA (2001)
Applications running on the Internet, or on limited-resource devices, need to be able to adapt to changes in their execution environment at run-time. Current languages and systems fall short of...
A Hierarchical Model for Coordination of Concurrent Activities (1999)
We describe a hierarchical model for coordination of concurrent activities based on grouping actors into casts and coordinating casts by actors that are designated directors. The hierarchical model...
Modular heterogeneous system development: A critical analysis of java (1998)
Gul A. Agha, Mark Astley, Jamil A. Sheikh, Carlos Varela
Java supports heterogeneous applications by transforming a heterogeneous network of machines into a homogeneous network of Java virtual machines. This approach abstracts over many of the...
Sectoral Balance Sheet Mismatches and Macroeconomic Vulnerabilities in Colombia, 1996-2003
Johannes Wiegand, Juan Manuel Lima, Enrique Montes, Carlos Varela
We employ an extended version of the Allen et al. (2002) Balance Sheet Approach to examine macroeconomic vulnerabilities in Colombia between 1996 and 2003, based on an unusually rich data set. We...
Hernando Vargas Herrera, Carlos Varela
This paper analyzes the evolution and impact of capital flows in Colombia over the past five years. An examination of the nature and composition of the capital flows indicates that to large extent...
Flotación Cambiaria y Esterilización Monetaria: La Experiencia de Colombia
El objetivo de este trabajo es analizar el drenaje de las reservas internacionales debido a los excesos monetarios (el llamado “efecto compensación”), en el contexto de la mayor flexibilización...
Hernando Vargas, Carlos Varela
This paper analyzes the evolution and impact of capital flows in Colombia over the past five years. An examination of the nature and composition of the capital flows indicates that to large extent...
Flotación Cambiaria y Esterilización Monetaria: La Experiencia de Colombia
El objetivo de este trabajo es analizar el drenaje de las reservas internacionales debido a los excesos monetarios (el llamado “efecto compensación”), en el contexto de la mayor flexibilización...
Flotación Cambiaria y Esterilización Monetaria: La Experiencia de Colombia
El objetivo de este trabajo es analizar el drenaje de las reservas internacionales debido a los excesos monetarios(el llamado "efecto compensación"), en el contexto de la mayor flexibilización...
Evolución de los Flujos de Capital y de la Deuda Externa del Sector Privado en Colombia 1990-2003
Gloria Alonso, Enrique Montes, Carlos Varela
En este trabajo se describe la evolución del marco regulatorio del acceso a los capitales externos y la dinámica de los mismos para Colombia durante el período 1990-junio de 2003. El análisis se...