Bulletin of the American Physical Society
2005 72nd Annual Meeting of the Southeastern Section of the APS
Thursday–Saturday, November 10–12, 2005; Gainesville, FL
Session CB: Computational Science |
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Chair: Jorge Rodriguez, University of Florida Room: Hilton Hawthorne |
Thursday, November 10, 2005 10:45AM - 11:21AM |
CB.00001: The Open Science Grid Invited Speaker: The Open Science Grid is a consortium of universities and national laboratories that supports scientific computing via an open collaboration of science researchers, software developers and resource providers. Applications from a variety of disciplines are supported on the OSG including HEP applications from LHC experiments Atlas and CMS, run II and other collaborations. In this talk I will describe the Open Science Grid, its organization, its operation and how we build and maintain one of the largest distributed computing infrastructures in the world. [Preview Abstract] |
Thursday, November 10, 2005 11:21AM - 11:33AM |
CB.00002: Applications of z-transform for single-parameter physical problems Chun F. Su, Charlie A. Sparrow, Tracy Miller, Robert L. Cook, Perry Perkins The z-transform of a function consists of both real and imaginary parts. The magnitudes of these two parts of the transform will depend upon the variable of the function. It is feasible to establish a relationship between the z-transform and the variable of the function. The established relationship can be used to facilitate analysis of some single-parameter practical problems. A few years ago, a study of the rocket engine simulator combustion was performed at Mississippi State University. The combustion temperature was determined to be around 3000K by using the recorded hydroxyl OH emission spectra. The OH emission spectra have been revisited recently to re-evaluate the combustion temperature by means of the z-transform. It has been found that the newly calculated results can be more reliable than the previous ones. Comparison of the current and previous results and some discussion will be presented. [Preview Abstract] |
Thursday, November 10, 2005 11:33AM - 11:45AM |
CB.00003: CMS Software Deployment on the Open Science Grid Bockjoo Kim, Richard Cavanaugh The Grid can provide computing resources and storages with great flexibility. Because of this flexibility, the same software can be installed without publication and notification to the application user community. Therefore, the flexibility brings the issue of using computing resources efficiently. Within a collaboration, if this type of activity could be organized and managed in a consistent manner, once could efficiently use the computing resources on the Grid. This presentation shows how CMS softwares that are used by the CMS collaboration for physics analyses can be installed, maintained, and published on the Open Science Grid (OSG) in a managed way. The presentation also shows how the OSG infrastructure is utilized to achieve the CMS software installation and publication for the CMS users across the Grid. Finally, the presentation provides a possible use case of the CMS software deployment on the OSG. [Preview Abstract] |
Thursday, November 10, 2005 11:45AM - 11:57AM |
CB.00004: The CODESH - COllaborative DEvelopment SHell - Project: Exploring New Levels of Collaboration Vaibhah Khandelwal, Dimitri Bourilkov A key feature of collaboration in science and software development is to have a log of what and how is being done - for private use and reuse and for sharing selected parts with collaborators, which most often today are distributed geographically on an ever larger scale. Even better if this log is automatic, created on the fly while a scientist or software developer is working in a habitual way, without the need for extra efforts. The CODESH - COllaborative DEvelopment SHell - project addresses this problem in a novel way, building on the concepts of virtual state and virtual transition to provide an automatic persistent logbook for sessions of data analysis or software development in a collaborating group. A repository of sessions can be configured dynamically to record and make available the knowledge accumulated in the course of a scientific or software endeavor. Access can be controlled to define logbooks of private sessions and sessions shared within or between collaborating groups. The architecture, implementation, use cases from high energy physics and feedback from users will be discussed. [Preview Abstract] |
Thursday, November 10, 2005 11:57AM - 12:09PM |
CB.00005: A Tier2 Center at the University of Florida Jorge Luis Rodriguez, Paul Avery, Dimitri Bourilkov, Richard Cavanaugh, Yu Fu, Bockjoo Kim, Craig Prescott The High Energy Physics (HEP) Group at the University of Florida is involved in a variety of projects ranging from HEP Experiments at hadron and electron positron colliders to cutting edge computer science experiments focused on grid computing. In support of these activities the Florida group have developed and deployed a computational facility consisting of several service nodes, compute clusters and disk storage devices. The resources contribute collectively or individually to production and development activities for the CMS experiment at the Large Hadron Collider (LHC), Monte Carlo production for the CDF experiment at Fermi Lab, the CLEO experiment, and research on grid computing for the GriPhyN, iVDGL and UltraLight projects. The collection of servers, clusters and storage devices is managed as a single facility using the ROCKS cluster management system. Operating the facility as a single centrally managed system enhances our ability to relocate and reconfigure the resources as necessary in support of our research and production activities. In this paper we describe the architecture, including details on our local implementation of the ROCKS systems and how this simplifies the maintenance and administration of the facility. [Preview Abstract] |
Thursday, November 10, 2005 12:09PM - 12:21PM |
CB.00006: Distributed Computing Grid Experiences in CMS DC04 Craig Prescott In March-April 2004 the CMS experiment undertook a Data Challenge (DC04). During the previous 8 months CMS undertook a large simulated event production. The goal of the challenge was to run CMS reconstruction for sustained period at 25Hz input rate, distribute the data to the CMS Tier-1 centers and analyze them at remote sites. Grid environments developed in Europe by the LHC Computing Grid (LCG) and in the US with Grid3 were utilized to complete the aspects of the challenge. A description of the experiences, successes and lessons learned from experiences with grid infrastructure is presented. [Preview Abstract] |
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