Stock markets : information vendors need SEC oversight to control automation risks : report to the Chairman, Securities and Exhange Commission /

"B-246404"--P. 1.

An evaluation of data systems for UI, CETA and other labor market programs /

Photocopy of: 1979 ed.

Optimizing storage and memory systems for energy and performance

Electrical energy is an essential resource for the modern world. Unfortunately, its price has almost doubled in the last decade. Furthermore, energy production is also currently one of the primary sources of pollution. These concerns are becoming more important in data-centers. As more computational power is required to serve hundreds of millions of users, bigger data-centers are becoming necessary. This results in higher electrical energy consumption. Of all the energy used in data-centers, including power distribution units, lights, and cooling, computer hardware consumes as much as 80%. Consequently, there is opportunity to make data-centers more energy efficient by designing systems with lower energy footprint. Consuming less energy is critical not only in data-centers. It is also important in mobile devices where battery-based energy is a scarce resource. Reducing the energy consumption of these devices will allow them to last longer and re-charge less frequently. Saving energy in computer systems is a challenging problem. Improving a system's energy efficiency usually comes at the cost of compromises in other areas such as performance or reliability. In the case of secondary storage, for example, spinning-down the disks to save energy can incur high latencies if they are accessed while in this state. The challenge is to be able to increase the energy efficiency while keeping the system as reliable and responsive as before. This thesis tackles the problem of improving energy efficiency in existing systems while reducing the impact on performance. First, we propose a new technique to achieve fine grained energy proportionality in multi-disk systems; Second, we design and implement an energy-efficient cache system using flash memory that increases disk idleness to save energy; Finally, we identify and explore solutions for the page fetch-before-update problem in caching systems that can: (a) control better I/O traffic to secondary storage and (b) provide critical performance improvement for energy efficient systems.

XML storage and retrieval using the semantic binary object -oriented database system (SEM-ODB)

Over the past five years, XML has been embraced by both the research and industrial community due to its promising prospects as a new data representation and exchange format on the Internet. The widespread popularity of XML creates an increasing need to store XML data in persistent storage systems and to enable sophisticated XML queries over the data. The currently available approaches to addressing the XML storage and retrieval issue have the limitations of either being not mature enough (e.g. native approaches) or causing inflexibility, a lot of fragmentation and excessive join operations (e.g. non-native approaches such as the relational database approach). ^ In this dissertation, I studied the issue of storing and retrieving XML data using the Semantic Binary Object-Oriented Database System (Sem-ODB) to leverage the advanced Sem-ODB technology with the emerging XML data model. First, a meta-schema based approach was implemented to address the data model mismatch issue that is inherent in the non-native approaches. The meta-schema based approach captures the meta-data of both Document Type Definitions (DTDs) and Sem-ODB Semantic Schemas, thus enables a dynamic and flexible mapping scheme. Second, a formal framework was presented to ensure precise and concise mappings. In this framework, both schemas and the conversions between them are formally defined and described. Third, after major features of an XML query language, XQuery, were analyzed, a high-level XQuery to Semantic SQL (Sem-SQL) query translation scheme was described. This translation scheme takes advantage of the navigation-oriented query paradigm of the Sem-SQL, thus avoids the excessive join problem of relational approaches. Finally, the modeling capability of the Semantic Binary Object-Oriented Data Model (Sem-ODM) was explored from the perspective of conceptually modeling an XML Schema using a Semantic Schema. ^ It was revealed that the advanced features of the Sem-ODB, such as multi-valued attributes, surrogates, the navigation-oriented query paradigm, among others, are indeed beneficial in coping with the XML storage and retrieval issue using a non-XML approach. Furthermore, extensions to the Sem-ODB to make it work more effectively with XML data were also proposed. ^

JEE - Gestor documental

El present treball final de carrera es basa en la creació d¿una aplicació web que permeti tant a entitats locals com a particulars, la gestió completa d¿un arxiu de documents. Conseqüentment, l¿estudi queda centrat en les fases d¿especificació, anàlisi, disseny, implementació, prova i manteniment del present projecte, i més en concret de cadascun dels subsistemes que el formen: identificació, usuaris, catàleg i préstecs.

Desarrollo de una aplicación para la gestión de documentos internos de ámbito empresarial

La asesoría de empresas Ribas Álvarez tiene, actualmente, un problema con la gestión de documentos internos, que se realiza mediante correo interno y una aplicación sencilla de indexación de archivos (HTML); sin ningún tipo de supervisión ni restricción. Esta empresa dispone de un cierto número de trabajadores, los cuales pertenecen a diferentes secciones (privadas o públicas) dentro de la empresa. La información que circula dentro de la empresa, no tiene ningún tipo de seguridad pudiendo cualquier trabajador, disponer de ella aunque no le sea de utilidad. Se quiere crear una aplicación que cumpla con las necesidades que la empresa desea para la administración y gestión de documentos internos, con un control de usuarios y seguridad de acceso a esta aplicación. El objetivo básico de la aplicación seria la creación y gestión de una intranet de control y seguimiento de documentos para una asesoría de empresas

Nou portal d'accés als materials en obert de la UdG : DUGi 2.0

La Biblioteca de la Universitat de Girona és l'encarregada de coordinar els repositoris digitals de la Universitat. A l'inici el repositori neix de la necessitat de difondre i preservar tota la recerca de la Universitat, però mica en mica el projecte va creixent i es creen diferents repositoris per a diferents tipus de continguts. Així es creen els repositoris DUGiDocs, DUGiMedia i DUGiFonsEspecials.L'objectiu d'aquest PFC és desenvolupar un portal web amb un sistema d'indexació que permeti la cerca per diferents criteris com, per exemple, autor, matèria i títol. L'entorn ha de tenir un disseny agradable per a l'usuari final i ha de permetre obtenir les dades del repositori que se li indiquin. També ha de ser capaç de detectar els possibles duplicats en els criteris de cerca i notificar-ho a l'administrador

Nou portal d'accés als materials en obert de la UdG : DUGi 2.0

La Biblioteca de la Universitat de Girona és l'encarregada de coordinar els repositoris digitals de la Universitat. A l'inici el repositori neix de la necessitat de difondre i preservar tota la recerca de la Universitat, però mica en mica el projecte va creixent i es creen diferents repositoris per a diferents tipus de continguts. Així es creen els repositoris DUGiDocs, DUGiMedia i DUGiFonsEspecials.L'objectiu d'aquest PFC és desenvolupar un portal web amb un sistema d'indexació que permeti la cerca per diferents criteris com, per exemple, autor, matèria i títol. L'entorn ha de tenir un disseny agradable per a l'usuari final i ha de permetre obtenir les dades del repositori que se li indiquin. També ha de ser capaç de detectar els possibles duplicats en els criteris de cerca i notificar-ho a l'administrador

Implementation of hospital-wide computer information system :a case study of this change process

This case study examines the impact of a computer information system as it was being implemented in one Ontario hospital. The attitudes of a cross section of the hospital staff acted as a barometer to measure their perceptions of the implementation process. With The Mississauga Hospital in the early stages of an extensive computer implementation project, the opportunity existed to identify staff attitudes about the computer system, overall knowledge and compare the findings with the literature. The goal of the study was to develop a greater base about the affective domain in the relationship between people and the computer system. Eight exploratory questions shaped the focus of the investigation. Data were collected from three sources: a survey questionnaire, focused interviews, and internal hospital documents. Both quantitative and qualitative data were analyzed. Instrumentation in the study consisted of a survey distributed at two points in time to randomly selected hospital employees who represented all staff levels.Other sources of data included hospital documents, and twenty-five focused interviews with staff who replied to both surveys. Leavitt's socio-technical system, with its four subsystems: task, structure, technology, and people was used to classify staff responses to the research questions. The study findings revealed that the majority of respondents felt positive about using the computer as part of their jobs. No apparent correlations were found between sex, age, or staff group and feelings about using the computer. Differences in attitudes, and attitude changes were found in potential relationship to the element of time. Another difference was found in staff group and perception of being involved in the decision making process. These findings and other evidence about the role of change agents in this change process help to emphasize that planning change is one thing, managing the transition is another.

Desarrollo de una aplicación para la gestión de documentos internos de ámbito empresarial

La asesoría de empresas Ribas Álvarez tiene, actualmente, un problema con la gestión de documentos internos, que se realiza mediante correo interno y una aplicación sencilla de indexación de archivos (HTML); sin ningún tipo de supervisión ni restricción. Esta empresa dispone de un cierto número de trabajadores, los cuales pertenecen a diferentes secciones (privadas o públicas) dentro de la empresa. La información que circula dentro de la empresa, no tiene ningún tipo de seguridad pudiendo cualquier trabajador, disponer de ella aunque no le sea de utilidad. Se quiere crear una aplicación que cumpla con las necesidades que la empresa desea para la administración y gestión de documentos internos, con un control de usuarios y seguridad de acceso a esta aplicación. El objetivo básico de la aplicación seria la creación y gestión de una intranet de control y seguimiento de documentos para una asesoría de empresas

Semantic-driven context-aware visual information indexing and retrieval: applied in the film post-production domain

A large volume of visual content is inaccessible until effective and efficient indexing and retrieval of such data is achieved. In this paper, we introduce the DREAM system, which is a knowledge-assisted semantic-driven context-aware visual information retrieval system applied in the film post production domain. We mainly focus on the automatic labelling and topic map related aspects of the framework. The use of the context- related collateral knowledge, represented by a novel probabilistic based visual keyword co-occurrence matrix, had been proven effective via the experiments conducted during system evaluation. The automatically generated semantic labels were fed into the Topic Map Engine which can automatically construct ontological networks using Topic Maps technology, which dramatically enhances the indexing and retrieval performance of the system towards an even higher semantic level.

To know or not to know: collection and use of racial and ethnic data in Federal assistance programs; a report.

Prepared by Cynthia Norris Graae, Program analyst, Office of Federal Civil Rights Evaluation.

A description of the Environmental Protection Agency's in-house library systems /

Mode of access: Internet.

Interstate identification index : is it an effective weapon in the war against violent crime? Is it interstate, does it identify, and is it an index? : hearing before the Committee on Governmental Affairs, United States Senate, One Hundred Third Congress, second session, December 6, 1994.

Shipping list no.: 95-0315-P.

USCG group control and communications system study /

Final report; January 1979.