On the Easy Use of Scientific Computing Services for Large Scale Linear Algebra and Parallel Decision Making with the P-Grade Portal

International audienceScientific research is becoming increasingly dependent on the large-scale analysis of data using distributed computing infrastructures (Grid, cloud, GPU, etc.). Scientific computing (Petitet et al. 1999) aims at constructing mathematical models and numerical solution techniques for solving problems arising in science and engineering. In this paper, we describe the services of an integrated portal based on the P-Grade (Parallel Grid Run-time and Application Development Environment) portal (http://www.p-grade.hu) that enables the solution of large-scale linear systems of equations using direct solvers, makes easier the use of parallel block iterative algorithm and provides an interface for parallel decision making algorithms. The ultimate goal is to develop a single sign on integrated multi-service environment providing an easy access to different kind of mathematical calculations and algorithms to be performed on hybrid distributed computing infrastructures combining the benefits of large clusters, Grid or cloud, when needed

Developing and Securing Software for Small Space Systems

The space systems industry is moving towards smaller multi-vendor satellites, known as Small Space. This shift is driven by economic and technological factors that necessitate hardware and software components that are modular, reusable, and secure. This research addresses two problems associated with the development of modular, reusable, and secure space systems: developing software for space systems (the Development Problem) and securing space systems (the Security Problem). These two problems are interrelated and this research addresses them together. The Development Problem encompasses challenges that space systems developers face as they try to address the constraints induced by reduced budgets, design and development lifecycles, maintenance allowances, multi-vendor component integration and testing timelines. In order to satisfy these constraints a single small satellite might incorporate hardware and software components from dozens of organizations with independent workforces and schedules. The Security Problem deals with growing need to ensure that each one of these software or hardware components behaves according to policy or system design as well as the typical cybersecurity concerns that face any information system. This research addresses the Development Problem by exploring the needs and barriers of Small Space to find the best path forward for the space systems industry to catch up with the methodology advancements already being widely used in other software fields. To do this exploration a series of five surveys, referred to as SISDPA, was conducted to assess current attitudes and state of practice among space system developers. This crystallized a need in space system development — modular reusable open networks can help Small Space realize its potential, but there is still need to address certain security threats. This research addresses the Security Problem by augmenting a modular reusable open-network software development framework, called SSM, by adding policy enforcement in the form of authentication, access control, and encryption provisions, to create a new development framework, SSSM. This design and implementation adds security provisions while minimizing the impact on developers using the framework. SSSM is evaluated in terms of developer and system resource burden and shows that SSSM does not significantly increase developer burden and preserves the ease-of-use of SSM

Complexity, Emergent Systems and Complex Biological Systems:\ud Complex Systems Theory and Biodynamics. [Edited book by I.C. Baianu, with listed contributors (2011)]

An overview is presented of System dynamics, the study of the behaviour of complex systems, Dynamical system in mathematics Dynamic programming in computer science and control theory, Complex systems biology, Neurodynamics and Psychodynamics.\u

Photo searching on small screen devices

Word processed copy.Includes bibliographical references (p. 221-239).The aim of this thesis is to improve HCI (Human-Computer Interaction) knowledge in the design of the next generation of photo search tools on small display devices. Today, these devices have all the ingredients for a truly mobile photo collection, such as large storage, multiple networking capabilities and high resolution screens. However, they lack the tools for searching through large collections of photographs. This is particularly important as users have expressed a desire to store images on mobile devices in the long term. No substantial research has looked at addressing users searching needs. Few researchers have considered the importance of supporting both searching and browsing to cater for user needs. None that we could find have assessed the potential impact of adding desktop-based annotation capabilities. Consequently, this thesis seeks to address these challenges and provide an empirical foundation for the design of photo search tools. To achieve these objectives an iterative user-centered design methodology was employed. The end practical result was a single photo search interface that incorporates the best traits of a variety of tools to support search. The thesis reflects on each cycle in the iterative design process. The first major area of contribution to the field of HCI improves existing knowledge on photo searching behavior by providing a number of empirically grounded findings about searching behavior. It identifies some of the core factors that influence search strategies and outlines a conceptual framework to guide the design of future systems. The second area of contribution is a single photo searching tool for small display devices that is based on iterative studies of various user interface designs. It integrates multiple search methods within a single user interface. In contrast to previous research in this area, the design is centered on locating events rather than individual images as we found that people naturally associate photographs with events when searching

Proceedings of the Second Caltech Conference on Very Large Scale Integration, held at the California Institute of Technology 19-21 January, 1981 ; Organized by the Caltech Computer Science Department and the Caltech Industrial Associates Office, and sponsored by Caltech Industrial Associates and the National Science Foundation

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Data systems elements technology assessment and system specifications, issue no. 2

The ability to satisfy the objectives of future NASA Office of Applications programs is dependent on technology advances in a number of areas of data systems. The hardware and software technology of end-to-end systems (data processing elements through ground processing, dissemination, and presentation) are examined in terms of state of the art, trends, and projected developments in the 1980 to 1985 timeframe. Capability is considered in terms of elements that are either commercially available or that can be implemented from commercially available components with minimal development

1981-82, 1982-83 GENERAL ISSUE- BULLETIN

1981-82, 1982-83 GENERAL ISSUE- BULLETINhttps://digitalrepository.unm.edu/course_catalogs/1090/thumbnail.jp