1,720,964 research outputs found
Data management services for engineering
No full textGeodise is a Grid-enabled, intelligent engineering design and optimisation search environment that provides engineers with a central point of access to a suite of tools that will enable them to improve designs, keep track of running and past jobs, and obtain advice. The service-based architecture consists of a number of Grid services providing design optimisation and search tools, CFD analysis applications, computation, knowledge and data resources
Matlab functions provide client functionality to the Grid
No full textSeveral toolboxes have been developed by the Geodise project to enable engineers to perform Grid-enabled design search and optimisation from the Matlab technical computing environment. The toolboxes provide a suite of Matlab functions that facilitate the composition of scripts to automate the evaluation of engineering designs by design search and optimisation tools. The generic functionality provided by these toolboxes includes access to compute resources, data management, file transfer, and certificate management tools. The functions provide a simple interface that is intuitive to users familiar with the Matlab environment. In addition we provide higher-level composite functions that build upon the core functions to perform problem specific tasks. By integrating Grid client functionality into Problem Solving Environments used day-to-day by engineers we are lowering the barriers to entry for professionals wishing to exploit Grid technologie
The GRID: computational and data resource sharing in engineering optimisation and design search
No full textWe present our GRID architecture for engineering optimization and design search. our system will allow seamless access to an intelligent knowledge repository, a state-of-the-art collection of optimisation and search tools, industrial strength analysis codes, and distributed computing and data resources. We focus on the underlying open standards technologies required to implement the system, and give exemplars of how they are being exploited at present. Of particular importance is the interchange of data throughout the system, for which we have adopted WC standards (eg. XML), and the ability to link together each of the components in the form of web services. In particular we demonstrate how Condor may be offered as a web service
A grid-enabled problem solving environment (PSE) for design optimisation within matlab
No full textThe process of design search and optimisation using Computational Fluid Dynamics (CFD) is computationally and data intensive, a problem well-suited to Grid computing. The Geodise toolkit is a suite of Grid-enabled design optimisation and search tools within the Matlab environment. The use of these tools by the engineer is facilitated by intelligent design advisers targeted initially at CFD. The role of remote computation and data access in constructing a Grid-enabled Problem Solving Environment is discussed. The use of the Geodise toolkit for design optimisation from within the Matlab environment is considered with an exemplar problem
GENIE: Exploiting Grid enabled computing and data handling resources for integrated Earth system modelling
No full textThe GENIE project is developing a grid based framework for the composition, execution and management of new Earth System Models, and the data they produce. Our principle aims are to• flexibly couple together state-of-the-art components to form unified Earth System Models (ESMs),• study and tune the resulting ESMs over multi-millennial timescales.We have achieved this by developing a framework and technologies which allow us to exploit:• grid-enabled computational resources, and• grid-enabled data management to allow post-processing, analysis and sharing of the distributed data produced by model runs.Our framework is based around the widely used Matlab problem solving environment and is also being extended to provide the same functionality for Python. It is built upon software developed by the UK Geodise project (www.geodise.org). A Matlab client
provides a common environment for the project Virtual Organisation and allows the scripting of model execution through an interface to the computational Grid (Globus
and Condor resources are supported). An augmented version of the Geodise Database Toolbox provides access to a grid-enabled repository for scripts, binaries and output data from the GENIE framework. In addition, rich metadata associated with these files is stored in a grid-enabled database, which can then be searched to locate files in the repository. We provide both GUI and programmatic access from the scripting environment to archive and retrieve files from the file repository and also to query
the metadata store. An interface is also provided to a sophisticated Design Search and Optimisation package OPTIONS which has been exploited in some of our tuning
studies.We will illustrate the use of our grid-enabled environment with a number of exemplars representative of the range of scientific challenges that we have been addressing. These include (1) ensemble studies of the behaviour of the ocean’s thermohaline circulation, (2) parameter tuning of coupled atmosphere, ocean and sea-ice models, and (3) multi-millennial timescale simulations. Our studies have used a wide range of local
and national grid-enabled computational and data handling resources and have demonstrated how the grid can be exploited for integrated Earth system modelling
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Implementation and utilisation of a Grid-enabled problem solving environment in Matlab
No full textIn many areas of design search and optimisation one needs to utilise computational fluid dynamics (CFD) methods in order to obtain a numerical solution of the flow field in and/or around a proposed design. From this solution measures of quality for the design may be calculated, which are then used by the optimisation methods. In large models the processing time for the CFD computations can very well be many orders of magnitude larger than for the optimisation methods themselves; and the overall optimisation process usually demands a combination of computational and database resources; therefore this class of problems is well suited to Grid computing. The Geodise toolkit is a suite of tools for Grid-enabled parametric geometry generation, meshing, CFD analysis, design optimisation and search, databasing, Grid computing, and notification within the Matlab environment. These Grid services are presented to the design engineer as Matlab functions that conform to the usual syntax of Matlab. The use of the Geodise toolkit in Matlab introduces a flexible and Grid-enabled problem solving environment (PSE) for design search and optimisation. This PSE is illustrated here with two exemplar problems
Tuning GENIE earth system model components using a Grid enabled data management system
No full textWe present the Grid enabled data management system that has been deployed for the GENIE project and demonstrate its use in tuning studies of an Earth system model. A Matlab client to the
system provides a common environment for the project Virtual Organization to share scripts, binaries and output data. By using tools available in the Geodise toolkits we have scripted the execution of tuning studies which exploit multiple heterogeneous computational resources and use the database repository to steer computation using multi-dimensional optimisation methods
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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