Desarrollo de un workflow genérico para el modelado de problemas de barrido paramétrico en sistemas distribuidos

This work presents the development and experimental validation of a generic workflow model applicable to any parameter sweep problem: the Parameter Sweep Scientific Workflow (PSWF) model. As part of it, a model for the monitoring and management of scientific workflows on distributed systems is developed. This model, Star Superscalar Status (SsTAT), is applicable to the StarSs programming model family. PSWF and SsTAT can be used by the scientific community as a reference for solving problems using the parameter sweep strategy. As an integral part of the work, the treatment of the parameter sweep problem is formalized. This is achieved by developing a general solution based on the PSNSS (Parameter Sweep Nested Summation Symbol) algorithm, using both the original sequential and a concurrent approach. Both versions are implemented and validated, showing its applicability to all automatable PSWF lifecycle phases. Load testing shows that large-scale parameter sweep problems can efficiently be addressed with the proposed approach. In addition, the SsTAT monitoring and management generic model is instantiated for a Grid environment. Thus, an operational implementation of SsTAT based on GRIDSs, GSTAT (GRID Superscalar Status), is developed. A series of tests performed on an actual heterogeneous Grid of computers shows that GSTAT can appropriately develop their functionality even in an environment so demanding as that. As a practical case, the model proposed here is applied to determining the molecular potential energy hypersurfaces. For this purpose, a specific instance of the workflow, called PSHYP (Parameter Sweep Hypersurfaces), is created.En este trabajo se presenta el desarrollo y validación experimental de un modelo de workflow genérico, aplicable a cualquier problema de barrido de parámetros, denominado Parameter Sweep Scientific Workflow (PSWF). Asimismo, se diseña y prueba un modelo de monitorización y gestión de workflows científicos, en sistemas distribuidos, designado como SsTAT (Star Superscalar Status) que es aplicable a la familia de modelos de programación Star Superscalar (StarSs). Los modelos PSWF y SsTAT pueden ser utilizados por la comunidad científica como referencia a la hora de resolver problemas mediante la estrategia de barrido de parámetros. Como parte integral del trabajo se formaliza el tratamiento del problema del barrido de parámetros, desarrollándose una solución general concretada en el algoritmo PSNSS (Parameter Sweep Nested Summation Symbol) en su versión secuencial y concurrente. Ambas versiones se implementan y validan, mostrándose su aplicabilidad a todas las fases automatizables del ciclo de vida PSWF. Mediante la realización de varias pruebas de carga se comprueba que el tratamiento de problemas de barrido de parámetros de gran envergadura puede abordarse eficientemente con la aproximación propuesta. A su vez, el modelo genérico de monitorización y gestión SsTAT se particulariza para un entorno Grid, generándose una implementación operativa del mismo, basada en GRIDSs, denominada GSTAT (GRID Superscalar Status). La realización de una serie de pruebas sobre un Grid real de computadores heterogéneo muestra que GSTAT desarrolla apropiadamente sus funciones incluso en un entorno tan exigente como este. Como caso práctico, se aplica el modelo aquí propuesto a la obtención de la hipersuperficie de energía potencial molecular generando a tal efecto un workflow específico denominado PSHYP (Parameter Sweep Hypersurfaces

Основи перекладацького анотування та реферування текстів різних типів і жанрів

Посібник пропонує теоретичні засади та практичні рекомендації з анотування та реферування й виконання анотаційного та реферативного перекладу текстів різних типів і жанрів, що є необхідною складовою формування професійної компетенції майбутніх перекладачів-референтів. Навчальний посібник призначено для студентів 4 курсу освітньо-кваліфікаційного рівня «бакалавр» денної форми навчання факультету іноземних мов

Underwater Vehicles

For the latest twenty to thirty years, a significant number of AUVs has been created for the solving of wide spectrum of scientific and applied tasks of ocean development and research. For the short time period the AUVs have shown the efficiency at performance of complex search and inspection works and opened a number of new important applications. Initially the information about AUVs had mainly review-advertising character but now more attention is paid to practical achievements, problems and systems technologies. AUVs are losing their prototype status and have become a fully operational, reliable and effective tool and modern multi-purpose AUVs represent the new class of underwater robotic objects with inherent tasks and practical applications, particular features of technology, systems structure and functional properties

NASA Tech Briefs, February 1993

Topics include: Communication Technology; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; Life Sciences

Federal policies to promote the widespread utilization of photovoltaic systems. Supplement: Review and critique

Review comments of the Congressional report entitled 'Federal Policies to Promote the Widespread Utilization of Photovoltaic Systems' are presented. Responses to the review comments by the Jet Propulsion Laboratory, preparer of the Congressional report, are also presented. The Congressional report discussed various issues related to promoting the deployment of photovoltaic systems through the Federal Photovoltaic Program. Various program strategies and funding levels were examined

An Incremental Navigation Localization Methodology for Application to Semi-Autonomous Mobile Robotic Platforms to Assist Individuals Having Severe Motor Disabilities.

In the present work, the author explores the issues surrounding the design and development of an intelligent wheelchair platform incorporating the semi-autonomous system paradigm, to meet the needs of individuals with severe motor disabilities. The author presents a discussion of the problems of navigation that must be solved before any system of this type can be instantiated, and enumerates the general design issues that must be addressed by the designers of systems of this type. This discussion includes reviews of various methodologies that have been proposed as solutions to the problems considered. Next, the author introduces a new navigation method, called Incremental Signature Recognition (ISR), for use by semi-autonomous systems in structured environments. This method is based on the recognition, recording, and tracking of environmental discontinuities: sensor reported anomalies in measured environmental parameters. The author then proposes a robust, redundant, dynamic, self-diagnosing sensing methodology for detecting and compensating for hidden failures of single sensors and sensor idiosyncrasies. This technique is optimized for the detection of spatial discontinuity anomalies. Finally, the author gives details of an effort to realize a prototype ISR based system, along with insights into the various implementation choices made

Women in leadership commemorative issue: selected conference papers 1998-2000

Includes: 1998 Women as Leaders: A Global Challenge 1999 Looking at our Future: Listening to the Past 2000 Keeping Gender on the Agend

Catastrophe and control : how technological disasters enhance democracy

Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Science, Technology, and Society, 1994.Includes bibliographical references (p. 401-422).by Wade Edmund Roush.Ph.D