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Sample records for access catalog opac

  1. A Comparison of Keyword Subject Searching on Six British University OPACs Online Public Access Catalogs.

    ERIC Educational Resources Information Center

    Aanonson, John

    1987-01-01

    Compares features of online public access catalogs (OPACs) at six British universities: (1) Cambridge; (2) Hull; (3) Newcastle; (4) Surrey; (5) Sussex; and (6) York. Results of keyword subject searches on two topics performed on each of the OPACs are reported and compared. Six references are listed. (MES)

  2. Bibliographic Displays in OPACs and Web Catalogs: How Well Do They Comply with Display Guidelines?

    ERIC Educational Resources Information Center

    Cherry, Joan M.

    1998-01-01

    Evaluation of data from assessments of full bibliographic displays in academic library OPACs (online public access catalogs) and World Wide Web catalogs against a checklist of desirable features found that OPAC displays scored 58% and Web displays scored 60%. Discusses weaknesses, focusing on those found in the majority of the displays…

  3. Catalog Use Studies--Since the Introduction of Online Interactive Catalogs: Impact on Design for Subject Access.

    ERIC Educational Resources Information Center

    Cochrane, Pauline A.; Markey, Karen

    1983-01-01

    This review of the transition from library card catalogs to online public access catalogs (OPAC) (1981-1982) discusses methods employed by online catalog use studies (self-administered questionnaires, OPAC transaction logs, focused-group interviews, feature analysis, online search and retrieval experiments) and new directions for OPAC research…

  4. URLs in the OPAC: Integrating or Disintegrating Research Libraries' Catalogs

    ERIC Educational Resources Information Center

    Burke, Gerald; Germain, Carol Anne; Van Ullen, Mary K.

    2003-01-01

    Research library catalogs serve as authoritative sources of access. The increasing practice of including Web sites in the catalog, resources not under the library's control, raises new issues of the catalog's accuracy and reliability. An analysis of ARL libraries' catalogs examined the persistence of cataloged URLs. Error rates ranged from a low…

  5. Online Public Access Catalog: The Google Maps of the Library World

    ERIC Educational Resources Information Center

    Bailey, Kieren

    2011-01-01

    What do Google Maps and a library's Online Public Access Catalog (OPAC) have in common? Google Maps provides users with all the information they need for a trip in one place; users can get directions and find out what attractions, hotels, and restaurants are close by. Librarians must find the ultimate OPAC that will provide, in one place, all the…

  6. Information Resources on Online Public Access Catalogs. A Selected ERIC Bibliography.

    ERIC Educational Resources Information Center

    ERIC Clearinghouse on Information Resources, Syracuse, NY.

    Sixteen articles, books, and reports published between 1978 and 1983 and cited in "Resources in Education" and "Current Index to Journals in Education" are listed in this bibliography on online public access catalogs (OPACs). Emphasis is on the movement toward computer-based alternatives to library card catalogs and user studies. Topics include…

  7. Guidelines for OPAC Displays.

    ERIC Educational Resources Information Center

    Yee, Martha M.

    This paper describes the IFLA (International Federation of Library Associations and Institutions) guidelines for librarians charged with customizing OPAC (online public access catalog) software and vendors and producers of this software. The guidelines are intended to apply to all types of catalog, including World Wide Web-based catalogs, GUI…

  8. Bringing Federal Documents to the Forefront for Library Users: Selective Cataloging Using an OPAC.

    ERIC Educational Resources Information Center

    Oliva, Victor T.

    2000-01-01

    Reviews the value of federal depository document titles and discuses reasons why many are worth cataloging. Several approaches to cataloging these titles to make them more readily accessible are profiled. The Adelphi University Library (New York) has devised a system, using Boolean logic and an online public access catalog to choose which titles…

  9. Users Look at Online Catalogs: Results of a National Survey of Users and Non-Users of Online Public Access Catalogs. Final Report.

    ERIC Educational Resources Information Center

    Lawrence, Gary S.

    A national study of users and non-users of public access online catalog systems (OPACs) was undertaken at 29 libraries, representing 15 computer systems, to provide data and interpretations useful to system designers and library administrators. The findings indicate that users have overwhelmingly positive responses to OPACs. Non-users have…

  10. Knowing Where They Went: Six Years of Online Access Statistics via the Online Catalog for Federal Government Information

    ERIC Educational Resources Information Center

    Brown, Christopher C.

    2011-01-01

    As federal government information is increasingly migrating to online formats, libraries are providing links to this content via URLs or persistent URLs (PURLs) in their online public access catalogs (OPACs). Clickthrough statistics that accumulated as users visited links to online content in the University of Denver's library OPAC were gathered…

  11. Keyword/Boolean Searching on an Online Public Access Catalog: Patrons and Their Perceptions.

    ERIC Educational Resources Information Center

    Ensor, Pat

    This report presents the results of a study which explored how patron perceptions and demographics related to keyword/Boolean searching on Indiana State University's (ISU) Library User Information System (LUIS), the online public access catalog (OPAC). Two general theses guide the study: (1) whether the use or non-use of keyword searching on LUIS…

  12. OPACs in the Clouds

    ERIC Educational Resources Information Center

    Webb, Paula L.; Nero, Muriel D.

    2009-01-01

    In today's world of instant everything, everyone has been exposed to some form of Web 2.0 technology, and higher education is not exempt from its long reach. Libraries of all types are incorporating Web 2.0 features to attract users as well as to showcase library services. The Online Public Access Catalog (OPAC) has become more user-friendly with…

  13. OPAC Missing Record Retrieval.

    ERIC Educational Resources Information Center

    Johnson, Karl E.

    1996-01-01

    When the Higher Education Library Information Network of Rhode Island transferred members' bibliographic data into a shared online public access catalog (OPAC), 10% of the University of Rhode Island's monograph records were missing. This article describes the consortium's attempts to retrieve records from the database and the effectiveness of…

  14. Terminal Ailments Need Not Be Fatal: A Speculative Assessment of the Impact of Online Public Access Catalogs in Academic Settings.

    ERIC Educational Resources Information Center

    Sandler, Mark

    1985-01-01

    Discusses several concerns about nature of online public access catalogs (OPAC) that have particular import to reference librarians: user passivity and loss of control growing out of "human-machine interface" and the larger social context; and the tendency of computerized bibliographic systems to obfuscate human origins of library information and…

  15. VizieR Online Data Catalog: Rosseland opacities with the OPAS model (Mondet+, 2015)

    NASA Astrophysics Data System (ADS)

    Mondet, G.; Blancard, C.; Cosse, P.; Faussurier, G.

    2015-10-01

    The OPAS opacity model has recently been used to calculate the solar opacities along a specific thermodynamical path (Blancard et al. 2012ApJ...745...10B). In the present work, we used this model to produce opacity tables that are useful for solar radiative zone modeling. The Rosseland opacities that we obtained are compared to Opacity Project (OP) (http://cdsweb.u-strasbg.fr/topbase/topbase.html) and OPAL (http://opalopacity.llnl.gov/) data. (1 data file).

  16. E-Referencer: Transforming Boolean OPACs to Web Search Engines.

    ERIC Educational Resources Information Center

    Khoo, Christopher S. G.; Poo, Danny C. C.; Toh, Teck-Kang; Hong, Glenn

    E-Referencer is an expert intermediary system for searching library online public access catalogs (OPACs) on the World Wide Web. It is implemented as a proxy server that mediates the interaction between the user and Boolean OPACs. It transforms a Boolean OPAC into a retrieval system with many of the search capabilities of Web search engines.…

  17. The Effect of Closed Catalogs on Public Access.

    ERIC Educational Resources Information Center

    Dwyer, James R.

    Microcatalog use studies at the University of Oregon have demonstrated that users encounter access difficulties when confronted with a multiple file microfiche catalog. This research verifies theories by Mooers, Zipf, and others that the public minimizes search efforts and implies that closed catalogs with supplements such as add-on catalogs will…

  18. The GUI OPAC: Approach with Caution.

    ERIC Educational Resources Information Center

    Hildreth, Charles R.

    1995-01-01

    Discusses the graphical user interface (GUI) online public access catalog (OPAC), a user interface that uses images to represent options. Topics include user interface design for information retrieval; designing effective bibliographic displays, including subject headings; two design principles; and what GUIs can bring to OPACs. (LRW)

  19. OPAC User Logs: Implications for Bibliographic Instruction.

    ERIC Educational Resources Information Center

    Kern-Simirenko, Cheryl

    1983-01-01

    Discusses characteristics of typical online public access catalogs (OPACs) and examines patron use via printouts of transaction logs for three separate systems. Desirable features of OPACs (mnemonic search commands, boolean operators, forgiveness or automatic truncation, browsing a subject heading index, suggestive prompts) and need for…

  20. Automating School Library Catalogs: A Reader.

    ERIC Educational Resources Information Center

    Murphy, Catherine, Ed.

    This collection of 23 articles compiled from school library journals address the special needs that make automation problematic for school libraries. The articles are divided into five sections: an overview of OPAC (Online Public Access Catalog) development (4 titles); evaluating OPAC systems (4 titles); implementing OPAC systems (6 titles);…

  1. Open Access Metadata, Catalogers, and Vendors: The Future of Cataloging Records

    ERIC Educational Resources Information Center

    Flynn, Emily Alinder

    2013-01-01

    The open access (OA) movement is working to transform scholarly communication around the world, but this philosophy can also apply to metadata and cataloging records. While some notable, large academic libraries, such as Harvard University, the University of Michigan, and the University of Cambridge, released their cataloging records under OA…

  2. Multisensory Public Access Catalogs on CD-ROM.

    ERIC Educational Resources Information Center

    Harrison, Nancy; Murphy, Brower

    1987-01-01

    BiblioFile Intelligent Catalog is a CD-ROM-based public access catalog system which incorporates graphics and sound to provide a multisensory interface and artificial intelligence techniques to increase search precision. The system can be updated frequently and inexpensively by linking hard disk drives to CD-ROM optical drives. (MES)

  3. VizieR Online Data Catalog: Galactic cold cores. V. Dust opacity (Juvela+, 2015)

    NASA Astrophysics Data System (ADS)

    Juvela, M.; Ristorcelli, I.; Marshall, D.; Montillaud, J.; Pelkonen, V.-M.; Ysard, N.; McGehee, P.; Paladini, R.; Pagani, L.; Malinen, J.; Rivera-Ingraham, A.; Lefevre, C.; Toth, L. V.; Montier, L. A.; Bernard, J.-P.; Martin, P.

    2015-01-01

    The project Galactic Cold Cores has carried out Herschel photometric observations of interstellar clouds where Planck satellite survey has located cold and compact clumps. The sources represent different stages of cloud evolution from starless clumps to protostellar cores and are located in different Galactic environments. We examine this sample of 116 Herschel fields to estimate the submillimetre dust opacity and to look for variations that could be attributed to the evolutionary stage of the sources or to environmental factors, including the location within the Galaxy. The submillimetre dust opacity is derived from Herschel data and near-infrared observations of the reddening of background stars are converted to near-infrared optical depth. We investigate the systematic errors affecting these parameters and use modelling to make corrections for the expected biases. The ratio of 250μm and J band opacities is correlated with the Galactic location and the star formation activity. Local variations in the ratio {tau}(250μm)/{tau}(J) are searched using the correlation plots and maps of the opacity ratio. We find a median ratio of {tau}(250μm)/μ(J)=(1.6+/-0.2)*10-3, which is more than three times the mean value reported for the diffuse medium. Assuming an opacity spectral index β=1.8 instead of β=2.0, the value would be smaller by ~30%. No significant systematic variation is detected with Galactocentric distance or with Galactic height. Examination of the {tau}(250μm)/{tau}(J) maps reveals half a dozen fields with clear indications of local increase of submillimetre opacity, up to {tau}(250μm)/{tau}(J)~4*10-3, towards the densest clumps. These are all nearby fields with spatially resolved clumps of high column density. We interpret the increase in the far-infrared opacity as a sign of grain growth in the densest and coldest regions of interstellar clouds. (2 data files).

  4. Enhancing Access to Information: Designing Catalogs for the 21st Century.

    ERIC Educational Resources Information Center

    Tyckoson, David A., Ed.

    This book addresses the problem of when a library has limited catalog access, and explores various technological methods to expand the catalog beyond its traditional boundaries. Fourteen chapters describe catalog projects in individual libraries: (1) "Enhancing Access to Information: Building Catalogs for the Future" (David A. Tyckoson); (2) "The…

  5. Documents to the People--Access through the Automated Catalog.

    ERIC Educational Resources Information Center

    Bolner, Myrtle Smith; Kile, Barbara

    1991-01-01

    Discussion of the need for bibliographic control of U.S. government documents in depository libraries focuses on a project that upgraded the GPO/MARC bibliographic tapes to permit documents to be included in public access catalogs. The roles of the participants are described, including MARCIVE, Inc., Louisiana State University, Rice University,…

  6. From Catalog to Web: Desktop Access to Sandia Technical Reports.

    ERIC Educational Resources Information Center

    Stoecker, Nora K.; Alford, Dixie L.

    1998-01-01

    Describes the processes developed in the Sandia National Laboratories (a Department of Energy multiprogram national laboratory) Technical Library to provide and improve desktop access to Sandia-generated documents. Discusses procedures for cataloging these electronic reports, including identification of the bibliographic information and MARC tags…

  7. System Features for Subject Access in the Online Catalog.

    ERIC Educational Resources Information Center

    Lawrence, Gary S.

    1985-01-01

    Describes various ways in which software systems for online catalogs can be designed to enhance subject access. Highlights include what to search (subject headings, titles, notes, authority-file records, classification numbers, and associated text); truncation and stemming; spelling correction; search strategies (headings, keywords, Boolean…

  8. Modifying the Existing Campus Building for Accessibility: Accessible Products Catalog.

    ERIC Educational Resources Information Center

    Cotler, Stephen Richard

    This catalog is intended to assist architects and college administrators to select products that help physically handicapped people lead lives free of architectural barriers. The product information, obtained directly from the manufacturers, is listed on comparative matrix sheets, that can be used to achieve the design recommendations. Products of…

  9. OPAC's at Five Ontario Universities: A Profile of Users and User Satisfaction.

    ERIC Educational Resources Information Center

    Cherry, Joan M.; Clinton, Marshall

    1992-01-01

    Reports results of 1990 study that examined user satisfaction with OPACs (online public access catalogs) at 5 Ontario universities through interviews with 2,916 students and faculty members. Data on OPAC and computer experience, learning methods, and the effects of several variables on satisfaction are analyzed for the entire sample and for each…

  10. Human Help at OPAC Terminals Is User Friendly: A Preliminary Study.

    ERIC Educational Resources Information Center

    Mendelsohn, Jennifer

    1994-01-01

    Examines the provision of in-person help to users seeking information on online public access catalogs (OPACs). A significant change in the demand for service was identified when there was a change from offering traditional from-the-desk service to point-of-use help at the OPAC terminals. Results suggest that while it is important to continue to…

  11. "Garbage" In, "Refuse and Refuse Disposal" Out: Making the Most of the Subject Authority File in OPAC.

    ERIC Educational Resources Information Center

    Horn, Marguerite E.

    2002-01-01

    Discusses the difference in subject access in OPACs (online public access catalogs) between subject searching (authority, alphabetic, or controlled vocabulary) versus keyword searching (uncontrolled, free text, natural language vocabulary). Compares a query on the term "garbage" in two online catalogs and discusses results. (Author/LRW)

  12. Online Catalog Instruction and User Satisfaction at a Medium-Sized Ohio Public Library.

    ERIC Educational Resources Information Center

    Fannin, Mary JoEllen

    This study suggests that it is important to study library users' reaction to and satisfaction with the instruction given to them for use of the online public access catalog (OPAC). The objective of this study was to discover the types of instruction that users at the Beavercreek Community Library (Ohio) feel are most useful in learning the OPAC.…

  13. Measures of Expected Online Catalog Performance for Public Access Terminals.

    ERIC Educational Resources Information Center

    Taylor, Raymond G., Jr.

    1988-01-01

    Describes the power of queuing models as a source of detailed, expected performance measures for online catalogs. An illustration of such a performance analysis is provided, and its value to library administrators is discussed. (9 notes with references) (CLB)

  14. A System for Low-Cost Access to Very Large Catalogs

    NASA Astrophysics Data System (ADS)

    Kalpakis, K.; Riggs, M.; Pasad, M.; Puttagunta, V.; Behnke, J.

    Many new and some old astronomical catalogs contain data for very large numbers of objects. To conduct their studies, researchers must have rapid access to those catalogs. At the same time, the monetary cost of achieving fast access should not come at the expense of resources that would be better used to support the actual scientific studies. We demonstrate how to achieve fast access to data on a low cost desktop for a very large catalog using the Informix Object-Relational database system. We report on experimental results from the development of a solution for efficiently indexing the USNO-A2.0 catalog, which has approximately 500 million objects. The solution offers significant performance improvements over some existing methods. We also describe an extension of Informix that enables users to apply their IDL scripts to data stored in Informix using SQL. This extension brings the powerful data-analysis and visualization capabilities of IDL within Informix.

  15. The Monolingual Cataloging Monolith: A Barrier to Library Access for Readers of Spanish.

    ERIC Educational Resources Information Center

    Jensen, Bruce

    2003-01-01

    Asserts that despite growing awareness of frontline public service concerns in accommodating Spanish speakers, little care is invested in the technical processing side of the library's responsibility to Spanish speakers. Examines the usefulness and accessibility of online public access catalogs for monolingual Spanish readers, focusing on records…

  16. ATLAS, an integrated structural analysis and design system. Volume 4: Random access file catalog

    NASA Technical Reports Server (NTRS)

    Gray, F. P., Jr. (Editor)

    1979-01-01

    A complete catalog is presented for the random access files used by the ATLAS integrated structural analysis and design system. ATLAS consists of several technical computation modules which output data matrices to corresponding random access file. A description of the matrices written on these files is contained herein.

  17. Testing a New Design for Subject Access to Online Catalogs.

    ERIC Educational Resources Information Center

    Drabenstott, Karen M.; Weller, Marjorie S.

    Over the last decade, studies of online catalogs have revealed that they frequently discourage users. Subject queries often fail to produce retrievals or produce retrieval sets that are too large and unwieldy to be easily scanned. Research shows that users are seeking alternative approaches to those that manipulate the subject headings in catalog…

  18. Selection of an Online Public Access Catalog: A Checklist Approach.

    ERIC Educational Resources Information Center

    O'Rourke, Victoria

    1987-01-01

    The development, field testing, and evaluation of a checklist approach to selecting an integrated library automation system are described, and recommendations for using this approach are outlined. The checklist, which is divided into five main sections of catalog features and functions, is appended. (Author/CLB)

  19. Records and Access: Museum Registration and Library Cataloging.

    ERIC Educational Resources Information Center

    Bierbaum, Esther Green

    1988-01-01

    Compares and contrasts museum registration and library cataloging processes, suggesting that differences in records management result from philosophical and historical differences. The feasibility and possible benefits of applying the competencies of library and information science to museum registration are discussed. (23 notes/references)…

  20. The First Whole Library Catalog; Access to Film.

    ERIC Educational Resources Information Center

    1973

    Films available from Films Incorporated are listed in this catalog under the following five headings: Art and Culture, Education and Information, Economy and Society, Health and Medicine, and the World Around Us. Each citation includes such data as the film's producer, director, cast, date, running time and whether it is in color, provides a…

  1. A Longitudinal Study of the Effects of OPAC Screen Changes on Searching Behavior and Searcher Success.

    ERIC Educational Resources Information Center

    Blecic, Deborah D.; Dorsch, Josephine L.; Koenig, Melissa H.; Bangalore, Nimala S.

    1999-01-01

    Describes a longitudinal study of four sets of OPAC (online public access catalog) transaction logs that examined the effects of screen changes in helping searchers improve their search behavior. Results show that while screen changes initially had a positive impact on search behavior, they were not always sustained over time. (Author/LRW)

  2. A Comparison of the Academic Index on CDROM with Four Wilson Indexes on the OPAC.

    ERIC Educational Resources Information Center

    Miller, Betty

    1995-01-01

    Reports results of a comparison of the Academic Index on CD-ROM and four indexes on the OPAC (online public access catalog) at Brooklyn College (New York): General Science Index, Humanities Index, Readers' Guide to Periodical Literature, and Social Science Index. Coverage of the "New York Times" was found to be important. (LRW)

  3. Techniques to Improve Subject Retrieval in Online Catalogs: Flexible Access to Elements in the Bibliographic Record.

    ERIC Educational Resources Information Center

    Connell, Tschera Harkness

    1991-01-01

    Discussion of improving subject access in online library catalogs focuses on a study that used a book description from "Book Review Digest" to evaluate the information on the bibliographic record found on the OCLC database. Matching by Library of Congress Subject Headings and by keywords in the title are discussed. (22 references) (LRW)

  4. A Study of Six Online Public Access Catalogs: A Review of Findings. Final Report.

    ERIC Educational Resources Information Center

    Matthews, Joseph R.

    Results from one of a series of cooperative projects to study public access to online catalogs are discussed. This report focuses on a survey of 1,152 users and 1,315 non-users of six computer systems at seven libraries, with library participants including (1) Claremont Colleges Library, which uses the Claremont Total Library System; (2) the…

  5. Searching for Information in an Online Public Access Catalogue (OPAC): The Impacts of Information Search Expertise on the use of Boolean Operators

    ERIC Educational Resources Information Center

    Dinet, Jrme; Favart, Monik; Passerault, Jean-Michel

    2004-01-01

    Boolean systems still constitute most of the installed base of online public access catalogues (OPACs) in the French universities even if many studies have shown that Boolean operators are not frequently used by non-librarian users (by contrast with professional librarians). The first study examined the use of Boolean operators by French…

  6. The Purpose of the Cataloging for Matters of Equitable Access: Spanish-Language Cataloging and "Everyday" Approaches of Non-Native English Speakers

    ERIC Educational Resources Information Center

    Adamich, Tom

    2009-01-01

    While teacher-librarians embrace the concept of equitable access when they select "multicultural" materials to include in their collections, plan special programs, and teach lessons on a variety of topics, what do they do to make equitable access a part of their online catalogs? Have they achieved (or nearly achieved) a consistent level of…

  7. Computer Cataloging of Electronic Journals in Unstable Aggregator Databases: The Hong Kong Baptist University Library Experience.

    ERIC Educational Resources Information Center

    Li, Yiu-On; Leung, Shirley W.

    2001-01-01

    Discussion of aggregator databases focuses on a project at the Hong Kong Baptist University library to integrate full-text electronic journal titles from three unstable aggregator databases into its online public access catalog (OPAC). Explains the development of the electronic journal computer program (EJCOP) to generate MARC records for…

  8. On-Line Catalog Evaluation Project. Data Analysis Plan, Version 2.2.

    ERIC Educational Resources Information Center

    Lawrence, Gary S.; And Others

    This document outlines the methodology to be used for analyzing and reporting data collected through questionnaires at the various libraries of the University of California in April and May of 1982, as the second phase of an online public access catalog (OPAC) evaluation project. It is noted that the project was designed to enable systems…

  9. On-Line Remote Catalog Access and Circulation Control System. Part I: Functional Specifications. Part II: User's Manual.

    ERIC Educational Resources Information Center

    International Business Machines Corp., Gaithersburg, MD. Data Processing Div.

    The Ohio State University Libraries On-line Remote Catalog Access and Circulation Control System (LCS) began on-line operations with the conversion of one department library in November 1970. By December all 26 libraries had been converted to the automated system and LCS was fully operational one month ahead of schedule. LCS is designed as a…

  10. Acquiring a CD-ROM Public Access Catalog System. Part 1: The Bottom Line May Not Be the Top Priority.

    ERIC Educational Resources Information Center

    Helgerson, Linda W.

    1987-01-01

    Compares pricing of seven CD-ROM-based public access catalog systems for libraries of diverse sizes and groupings. Other features of the systems are outlined in the broad areas of database preparation, indexing, database updates, hardware, information retrieval, library controlled elements, interlibrary loan, reports, user support, future…

  11. Addressing the issue of cataloging and making chiropractic literature accessible: Part I: Defining the problem.

    PubMed

    Curl, D D; Antovich, T J

    1990-06-01

    Health science journals are a principle source of new knowledge for chiropractors, chiropractic faculty and students. Regrettably, clinically or educationally relevant articles (appearing in the nearly 20,000 journals annually) are often overlooked due to access difficulties. Innovations are needed to assist the reader to select articles relevant to chiropractic and reduce the time spent sorting through the volumes of literature. A review of the literature shows there is a trend toward database management for cataloging and accessibility of other, nonchiropractic, literature. Most notable of these is an endeavor by National Technical Information Service, commonly referred to as MEDLARS (Medline). It is interesting to note that a computer-assisted library database program does not exist on any chiropractic campus. This is in contrast with the trend on campuses of other health care fields. Manual search strategies within the chiropractic literature are time consuming, subject to a high failure rate, and even if the search produces citations, there is no assurance the journal can be accessed unless a chiropractic campus is nearby. Furthermore, difficulties exist when a chiropractic literature search is attempted in any computerized database, e.g., MEDLARS (Medline). Journals/articles that are unique to chiropractic (national, international or on the state level) are not specifically included in these computerized databases. Aside from these difficulties, there exists the problem of finding those articles that contain valid and relevant information from among those that are less valid or informative. PMID:2198323

  12. The Virtual Jason Control Van: A GeoBrowser Application for Automatic Data Cataloging and Access

    NASA Astrophysics Data System (ADS)

    Lerner, S.

    2001-12-01

    Today's scientific underwater remotely operated vehicles (ROVs) generate a tremendous amount of data collected from a variety of sensors in real-time. Often integrated information such as multiple video streams, vehicle telemetry, and scientific data are only available to the users in the ROV control-van during real-time operations. Although all the data is logged, it is extremely difficult for scientists to re-create this integrated information and have the ability to view and access an entire cruise dataset in an integrated fashion. We introduce a methodology of taking real-time information snapshots during events that occur within the ROV control-van and using these snapshots for data access and analysis. We take control-van snapshots during "interesting" events as defined whenever a scientist enters an event via a computer, and we also take snapshots at regular time intervals such as once a minute to ensure complete data coverage. As part of the JasonII ROV upgrade, we have developed a prototype system that automatically captures the information in the control-van during ROV operations including up to four simultaneous video sources, vehicle data, scientific instrument data, and event data. These control-van snapshots are automatically cataloged and immediately accessible and searchable via a web-browser. The system is designed for both scientific and public outreach needs and will be integrated with the SeaNet system to provide remote access on-shore for scientific collaboration and public outreach. During this past year, the prototype system has been deployed on four Jason cruises and has captured over 40,000 control-van snapshots, containing more than 160,000 images. Each control-van snapshot seamlessly integrates the four simultaneous video snapshots with vehicle data such as navigation, depth, and heading, scientific instrument data from instruments such as a ctd and a magnetometer, and event data as entered by scientists. All this information is

  13. A Cataloger's Workstation: Using a NeXT Computer and Digital Librarian Software to Access the "Anglo-American Cataloguing Rules."

    ERIC Educational Resources Information Center

    Gomez, Joni

    1993-01-01

    Describes a project that experimented with using a NeXT computer as a cataloger's workstation. The use of Digital Librarian software to access the text of "Anglo-American Cataloging Rules" (AACR) on magneto-optical disk is discussed, and suggestions for future developments are made. (four references) (LRW)

  14. Comparative Study of Periodical Literature Indexing: Print versus Electronic Access. Final Report.

    ERIC Educational Resources Information Center

    Lowry, Charles B.

    This 2-year project at the University of Texas at Arlington (UTA) was conducted to determine the feasibility of providing online periodical indexing to the journal holdings of the UTA libraries by demonstrating an extended use of the libraries' NOTIS Online Public Access Catalog (OPAC) to provide better access to local resources. Three approaches…

  15. Access to Fiction for Children: A User-Based Assessment of Options and Opportunities.

    ERIC Educational Resources Information Center

    Solomon, Paul

    1997-01-01

    Naturalistic observation and questioning of children grades 1-6 in school library media centers investigated their intentions, purposes, search terms, strategies, successes, and breakdowns in accessing fiction through Online Public Access Catalogs (OPACs). Presents a framework of perspectives (individual, social cultural, task, time and timing) to…

  16. Providing access to satellite imagery through OGC catalog service interfaces in support of the Global Earth Observation System of Systems

    NASA Astrophysics Data System (ADS)

    Bai, Yuqi; Di, Liping

    2011-04-01

    The Global Earth Observation System of Systems (GEOSS) architecture requires supporting discovery and access to large volumes of Earth Observation data. To support this application requirement in a polar ecosystem scenario, the project constructed a metadata catalog service for pre-collected orthorectified Landsat satellite images with global coverage. This study investigates the characteristics and challenges in building Open Geospatial Consortium Inc. (OGC) catalog service. It further presents a general lightweight XML adapter for relational tables, followed by a general OGC catalog service solution based on this adapter. This adapter relies on two configuration files to make the core software modules independent of the underlying metadata database structure. One configuration file identifies how XML schema is mapped into relational schema, and the other represents the XML output template. At runtime, this adapter internally employs a two-step mechanism: XQuery processing and XML publication. In the XQuery processing step, metadata discovery requests are interpreted, resulting in an SQL query clause. In the XML publication step, this SQL query and other dynamically generated queries are executed to generate the output according to the predefined XML template. Successful application of this OGC catalog service solution in the GEOSS AIP-2 polar ecosystem scenario is presented, followed by an analysis on its advantages and limitations.

  17. A Common Ground: Communication and Alliance between Cataloger and Curator for Improved Access to Rare Books and Special Collections.

    ERIC Educational Resources Information Center

    Bradshaw, Elaine Beckley; Wagner, Stephen C.

    2000-01-01

    Examines rare book cataloging from the perspectives of cataloger and curator; discusses the areas where a cataloger-curator alliance can affect cataloging, as well as relevant factors over which the two have little control; and promotes a concept of customized cataloging for special collections materials. (Contains 17 references.) (Author/MES)

  18. Accessing, Mining, and Archiving an On-line Database -- The APS Catalog of the POSS I

    NASA Astrophysics Data System (ADS)

    Humphreys, R. M.; Cabanela, J. E.; Kriessler, J.

    2000-12-01

    The APS Catalog of the POSS I is an on-line database of over 100 million stars and galaxies (http://aps.umn.edu). A unique subset of this database with over 218,000 galaxies within 30 degrees of the North Galactic Pole, the MAPS-NGP, is now available at our web site. This diameter--selected catalog (>= 10 arcsec) is the deepest galaxy catalog constructed over such a large area of the sky (3000 sq. degrees). The MAPS-NGP includes many additional parameters for the galaxy images not available in the APS Catalog. Working with members of our computer science department, we have developed a morphological classifier for galaxies that divides our galaxy type into three classes -- early, intermediate, and late. We have applied data mining techniques to identify the most useful image parameters for input into a neural network and decision--tree based classifier pipeline. We are also archiving the APS Catalog for distribution to astronomical data centers including NASA's ADC and SIMBAD at CDS. The extragalactic subset will be integrated into the NASA/IPAC extragalactic database(NED). The MAPS-NGP has already been provided to NED. The APS is supported by NASA's Applied Information Systems Research Program.

  19. Opacity of stellar matter

    SciTech Connect

    Rogers, F J

    1998-09-17

    New efforts to calculate opacity have produced significant improvements in the quality of stellar models. The most dramatic effect has been large opacity enhancements for stars subject to large amplitude pulsations. Significant improvement in helioseismic modeling has also been obtained. A description and comparisons of the new opacity efforts are give

  20. When Smart People Fail: An Analysis of the Transaction Log of an Online Public Access Catalog.

    ERIC Educational Resources Information Center

    Peters, Thomas A.

    1989-01-01

    Describes a low cost study of the transaction logs of an online catalog at an academic library that examined failure rates, usage patterns, and probable causes of patron problems. The implications of the findings for bibliographic instruction and collection development are discussed and the benefits of analyzing transaction logs are identified.…

  1. News from the opacity consortium OPAC

    NASA Astrophysics Data System (ADS)

    Turck-Chièze, S.; Gilles, D.

    2013-03-01

    The international OPAC consortium (see list below) was formed three years ago. It is composed of astrophysicists, plasma physicists and experimentalists from different laboratories. This consortium examines specific opacity calculations used in stellar physics. They contribute to solve the problems suggested by the astrophysical community in performing new calculations and new experiments with laser installation. We show here the specific example of the iron opacity peak that plays an important role in the envelope of intermediate-mass and massive stars and we present our first conclusions on iron and nickel.

  2. Cataloging Internet resources.

    PubMed

    Flannery, M R

    1995-04-01

    The number of resources available on the Internet continues to expand exponentially, but finding appropriate resources is still a fragmented, hit-or-miss operation. Traditional library expertise in bibliographic description and access should be applied to the management of this emerging body of material. In the process, catalogers will be able to assess the adequacy of current tools (e.g., cataloging codes, machine-readable cataloging formats, integrated library systems) for providing access to Internet resources and will contribute credibly to design or redesign of access tools. This paper outlines the major issues that must be considered in cataloging electronic resources. PMID:7599587

  3. Electronic Journals in Aggregated Collections: Providing Access through the Catalog and a Cold Fusion Database

    ERIC Educational Resources Information Center

    Anderson, Sue

    2005-01-01

    Patrons in academic libraries want convenient 24-hour access to full-text journals in a rapid, convenient manner. They want "anytime, anywhere" access to information and they do not want to enter a library to obtain it. This article describes how Eastern Washington University Libraries provide access to full-text journals through several…

  4. Perspectives on Map Cataloging and Classification.

    ERIC Educational Resources Information Center

    Schroeder, John R.

    1981-01-01

    Presents an overview of the developments and dilemmas related to the cataloging and classification of maps, addressing the areas of online library systems, cooperative cataloging, descriptive cataloging, subject access, and the improvement of network capabilities. Seventeen references are cited. (FM)

  5. The stellar opacities

    NASA Astrophysics Data System (ADS)

    Turck-Chièze, S.; Gilles, D.; Gilleron, F.; Pain, J. C.

    2013-11-01

    Opacities are fundamental ingredients of stellar physics. Helioseismology and asteroseismology have put in evidence anomalies that could be attributed to an insufficient knowledge of the photon-plasma interactions. We work on a revision of this plasma physics in the conditions where the anomalies have been found: the region of the iron opacity peak near log T= 5.2 and the inner radiative region of Sun and solar-like stars. The international OPAC consortium performs new calculations, compares them and looks for the origin of their differences. In parallel, experimental campaigns are realized, others are in preparation to validate some conclusions on the reliability of the new proposed calculations. New tables for astrophysics will be performed in the framework of the ANR OPACITY and their influence on seismic observables will be studied. We explicit here the difficulty of the computations together with some computation resources.

  6. The user friendly card catalog.

    PubMed

    Lee, S K; Ekstrand, N L

    1984-01-01

    The changing roles and relationships of professional staff in Reference and Cataloging departments in the catalog creation process are discussed. Specific examples are given for handling classification, subject headings and cross references. The article stresses the importance of interface between the two departments in making the catalog more accessible to the users of the library. PMID:10268036

  7. OPserver: opacities and radiative accelerations on demand

    NASA Astrophysics Data System (ADS)

    Mendoza, C.; González, J.; Seaton, M. J.; Buerger, P.; Bellorín, A.; Meléndez, M.; Rodríguez, L. S.; Delahaye, F.; Zeippen, C. J.; Palacios, E.; Pradhan, A. K.

    2009-05-01

    We report on developments carried out within the Opacity Project (OP) to upgrade atomic database services to comply with e-infrastructure requirements. We give a detailed description of an interactive, online server for astrophysical opacities, referred to as OPserver, to be used in sophisticated stellar modelling where Rosseland mean opacities and radiative accelerations are computed at every depth point and each evolution cycle. This is crucial, for instance, in chemically peculiar stars and in the exploitation of the new asteroseismological data. OPserver, downloadable with the new OPCD_3.0 release from the Centre de Données Astronomiques de Strasbourg, France, computes mean opacities and radiative data for arbitrary chemical mixtures from the OP monochromatic opacities. It is essentially a client-server network restructuring and optimization of the suite of codes included in the earlier OPCD_2.0 release. The server can be installed locally or, alternatively, accessed remotely from the Ohio Supercomputer Center, Columbus, Ohio, USA. The client is an interactive web page or a subroutine library that can be linked to the user code. The suitability of this scheme in grid computing environments is emphasized, and its extension to other atomic database services for astrophysical purposes is discussed.

  8. Federating Metadata Catalogs

    NASA Astrophysics Data System (ADS)

    Baru, C.; Lin, K.

    2009-04-01

    The Geosciences Network project (www.geongrid.org) has been developing cyberinfrastructure for data sharing in the Earth Science community based on a service-oriented architecture. The project defines a standard "software stack", which includes a standardized set of software modules and corresponding service interfaces. The system employs Grid certificates for distributed user authentication. The GEON Portal provides online access to these services via a set of portlets. This service-oriented approach has enabled the GEON network to easily expand to new sites and deploy the same infrastructure in new projects. To facilitate interoperation with other distributed geoinformatics environments, service standards are being defined and implemented for catalog services and federated search across distributed catalogs. The need arises because there may be multiple metadata catalogs in a distributed system, for example, for each institution, agency, geographic region, and/or country. Ideally, a geoinformatics user should be able to search across all such catalogs by making a single search request. In this paper, we describe our implementation for such a search capability across federated metadata catalogs in the GEON service-oriented architecture. The GEON catalog can be searched using spatial, temporal, and other metadata-based search criteria. The search can be invoked as a Web service and, thus, can be imbedded in any software application. The need for federated catalogs in GEON arises because, (i) GEON collaborators at the University of Hyderabad, India have deployed their own catalog, as part of the iGEON-India effort, to register information about local resources for broader access across the network, (ii) GEON collaborators in the GEO Grid (Global Earth Observations Grid) project at AIST, Japan have implemented a catalog for their ASTER data products, and (iii) we have recently deployed a search service to access all data products from the EarthScope project in the US

  9. Opacity incident reduction corrective action

    SciTech Connect

    Levyash, I.G.; Benegal, S.D.; Claase, B.J.M.

    1998-07-01

    This paper illustrates some of the methods used to reduce the number of package boiler opacity incidents at the Consolidated Edison Company of New York, Inc. East River Generating Station. The principal objective was to reduce opacity exceedances caused by the design of boiler auxiliaries. Opacity causes were identified and grouped. A matrix was developed to keep track of repairs and corrections on all package boilers. A special maintenance program was developed to sustain opacity reduction.

  10. Reinvent Catalogers!

    ERIC Educational Resources Information Center

    Waite, Ellen J.

    1995-01-01

    Reviews trends in catalog and technical service departments in response to information needs of library patrons, administrations of catalog and technical services departments, and professional standards that no longer meet patron needs. Discusses patron search patterns; the role of catalogers; and results of sharing cataloging records, downsizing,…

  11. Molecular opacities for exoplanets.

    PubMed

    Bernath, Peter F

    2014-04-28

    Spectroscopic observations of exoplanets are now possible by transit methods and direct emission. Spectroscopic requirements for exoplanets are reviewed based on existing measurements and model predictions for hot Jupiters and super-Earths. Molecular opacities needed to simulate astronomical observations can be obtained from laboratory measurements, ab initio calculations or a combination of the two approaches. This discussion article focuses mainly on laboratory measurements of hot molecules as needed for exoplanet spectroscopy. PMID:24664921

  12. Molecular opacities for exoplanets

    PubMed Central

    Bernath, Peter F.

    2014-01-01

    Spectroscopic observations of exoplanets are now possible by transit methods and direct emission. Spectroscopic requirements for exoplanets are reviewed based on existing measurements and model predictions for hot Jupiters and super-Earths. Molecular opacities needed to simulate astronomical observations can be obtained from laboratory measurements, ab initio calculations or a combination of the two approaches. This discussion article focuses mainly on laboratory measurements of hot molecules as needed for exoplanet spectroscopy. PMID:24664921

  13. NASA climate data catalog

    NASA Technical Reports Server (NTRS)

    Reph, M. G.

    1984-01-01

    This document provides a summary of information available in the NASA Climate Data Catalog. The catalog provides scientific users with technical information about selected climate parameter data sets and the associated sensor measurements from which they are derived. It is an integral part of the Pilot Climate Data System (PCDS), an interactive, scientific management system for locating, obtaining, manipulating, and displaying climate research data. The catalog is maintained in a machine readable representation which can easily be accessed via the PCDS. The purposes, format and content of the catalog are discussed. Summarized information is provided about each of the data sets currently described in the catalog. Sample detailed descriptions are included for individual data sets or families of related data sets.

  14. Stellar opacity validations

    NASA Astrophysics Data System (ADS)

    Le Pennec, M.; Turck-Chièze, S.; Ribeyre, X.; Ducret, J. E.

    2014-12-01

    This paper focuses on the radiative transfer in stars where opacities seem to raise problems : β-Cephei and solar-type stars. We first concentrate on the iron bump (log T = 5.25), responsible for β-Cephei pulsations through the κ-mechanism. To discriminate between the different opacity calculations used to predict their oscillations, new well-qualified calculations are used and compared to OP calculations. In parallel with this theoretical work, an experiment has been conducted at LULI 2000 in 2011 on iron and nickel. We show that this extended study pushes for the revision of the tables in the conditions corresponding to the iron bump region, at least for nickel. We will then deal with the Sun case for which we are preparing an opacity experiment on a high-energy laser, in some conditions of the radiative zone (T = [2 - 15 ×10^{6} K] and ρ = [0.2 - 150 g/cm^{3}]). To reach these high temperatures and densities at LTE and validate or not plasma effects and line widths, we are exploring an approach called the Double Ablation Front, driven by plasma radiative effects. The 1D simulations performed with the code CHIC show that with this technique, we could reach conditions equivalent to the conditions of half of the solar radiative zone.

  15. Data Definition and the Decline of Cataloging Quality.

    ERIC Educational Resources Information Center

    Burger, Robert H.

    1983-01-01

    Discussion of the process of library cataloging notes the 8th century cataloger, Alcuin; purpose of cataloging; bibliographic control; access to information; cataloging on OCLC; emphasis on the format in which cataloging information is communicated; lost precision; authority files; and recall versus precision. Seven references are included. (EJS)

  16. Evaluating Public Access On-Line Catalogs. Phase I: Development and Testing of Data Collection and Analysis Tools. Final Report.

    ERIC Educational Resources Information Center

    Larson, Ray R.

    This report outlines specifications for the online transaction monitoring and questionnaire administration features of the University of California's (UC) Prototype On-Line Catalog, known as MELVYL. The development and testing of these features by the UC Division of Library Automation (DLA) is also described. This document is the final report…

  17. Computing NLTE Opacities -- Node Level Parallel Calculation

    SciTech Connect

    Holladay, Daniel

    2015-09-11

    Presentation. The goal: to produce a robust library capable of computing reasonably accurate opacities inline with the assumption of LTE relaxed (non-LTE). Near term: demonstrate acceleration of non-LTE opacity computation. Far term (if funded): connect to application codes with in-line capability and compute opacities. Study science problems. Use efficient algorithms that expose many levels of parallelism and utilize good memory access patterns for use on advanced architectures. Portability to multiple types of hardware including multicore processors, manycore processors such as KNL, GPUs, etc. Easily coupled to radiation hydrodynamics and thermal radiative transfer codes.

  18. Combining OPAC and lidar

    NASA Astrophysics Data System (ADS)

    Nicolae, Doina; Talianu, Camelia; Radu, Cristian; Stefan, Sabina

    2007-10-01

    The properties of aerosol particles are highly variable, both in time and space. This refers to the number density, the microphysical properties (size distribution, refractive index, effective radius), and to the height distribution. In most cases the actual properties are not known. Using lidar data together with models can help improve the knowledge regarding the particulate atmospheric constituents which affect local radiative forcing, the radiation balance of the earth, and thus climate. This paper presents an attempt to integrate elastic backscatter lidar data in OPAC software package in order to find the most realistic aerosol vertical distribution and their optical and microphysical characteristics. The necessity to reduce the variability of naturally occurring aerosols to typical cases, but without neglecting possible fluctuations, is achieved in OPAC by the use of a dataset of typical internally mixed aerosol components. In addition, any mixtures of the basic components can be used to calculate the overall optical parameters. Experimental or modeled meteorological profiles (temperature, pressure, relative humidity) in complementary to experimental lidar data are used to calculate the solutions of lidar equation that fits, in an iterative manner, to the output of the model. Two type of uncertainties are diminished in this way: first, the modeled profiles of lidar ratio are used in lidar data processing instead of a constant value; second, aerosol height profiles are no longer being assumed in the model, but directly measured. This procedure was applied to synthetic lidar signals in order to test its advantages and limitation.

  19. Book Catalogs versus Card Catalogs *

    PubMed Central

    Pizer, Irwin H.

    1965-01-01

    The development of the library catalog in book form and its abandonment in favor of the card catalog are briefly traced. The advantages and disadvantages of both types of catalogs are enumerated, and several solutions which tried to combine the best features of both are discussed. The present trend back to the book catalog, made possible by recent advances in computer technology, is analyzed, advantages and disadvantages are compared, current examples are illustrated, and finally the computerized catalog is weighed against both the book and card catalog as to main features and practicality. PMID:14271116

  20. Downloading from the OPAC: The Innovative Interfaces Environment.

    ERIC Educational Resources Information Center

    Spore, Stuart

    1991-01-01

    Discussion of downloading from online public access catalogs focuses on downloading to MS-DOS microcomputers from the INNOPAC online catalog system. Tools for capturing and postprocessing downloaded files are described, technical and institutional constraints on downloading are addressed, and an innovative program for overcoming such constraints…

  1. Helioseismic Tests of Radiative Opacities.

    SciTech Connect

    Guzik, J. A.; Neuforge, C. M.; Keady, J. J.; Magee, N. H.; Bradley, P. A.

    2002-01-01

    During the past fifteen years, thousands of solar acoustic oscillation modes have been measured to remarkable precision, in many cases to within 0.01%. These frequencies have been used to infer the interior structure of the sun and test the physical input to solar models. Here we summarize the procedures, input physics and assumptions for calculating a standard solar evolution model. We compare the observed and calculated sound speed profile and oscillation frequencies of solar models calibrated using the new Los Alamos LEDCOP and Livermore OPAL Rosseland mean opacities for the same element mixture. We show that solar oscillations are extremely sensitive to opacities, with opacity differences of only a few percent producing an easily detectable effect on the sound speed and predicted frequencies. The oscillation data indicate that agreement would be improved by an opacity increase of several percent below the convection zone for both the LEDCOP and OPAL opacities.

  2. The Weakest Link: Library Catalogs.

    ERIC Educational Resources Information Center

    Young, Terrence E., Jr.

    2002-01-01

    Describes methods of correcting MARC records in online public access catalogs in school libraries. Highlights include in-house methods; professional resources; conforming to library cataloging standards; vendor services, including Web-based services; software specifically developed for record cleanup; and outsourcing. (LRW)

  3. THE IRON OPACITY PROJECT: High-Energy-Density Plasma Opacities

    NASA Astrophysics Data System (ADS)

    Palay, E.; Orban, C.; Nahar, S.; Pradhan, A.; Pinnsonoault, M.; Bailey, J.

    2013-05-01

    Opacity governs radiation flow in plasma sources. Accurate opacities are needed to model unobservable laboratory and astrophysical conditions. High-energy-density (HED) plasma conditions prevalent in stellar interiors can now be recreated in the laboratory. The Z-pinch fusion device at the Sandia National Lab can reproduce temperatures and densities near the boundary where radiation transport changes from diffusion to convection inside the Sun. To benchmark theoretical opacities experiments are essential to resolve the outstanding discrepancy in solar abundances. The most common volatile elements C, N, O, Ne, etc. have been spectroscopically measured to be up to 50% lower than the standard abundances. This introduces conflict in the derived values of basic solar parameters such as the radiation/convection boundary, sound speed, and the primordial He abundance with precisely measured oscillations of the Sun through Helioseismology. A potential solution is increment of stellar opacities, which has inverse but complex relation with abundacnes, at least 30%. New iron opacity calculations include hitherto neglected atomic physics of fine structure and resonances which are largely treated as lines in existing opacities calculations. Preliminary results on radiative transitions in Ne Partial support: DOE,NSF.

  4. Integrating Electronic Resources into the Library Catalog: A Collaborative Approach.

    ERIC Educational Resources Information Center

    Herrera, Gail; Aldana, Lynda

    2001-01-01

    Describes a project at the University of Mississippi Libraries to catalog purchased electronic resources so that access to these resources is available only via the Web-based library catalog. Discusses collaboration between cataloging and systems personnel; and describes the MARC catalog record field that contains the information needed to locate…

  5. Management of Opacities in Children and Adolescents.

    PubMed

    Wallace, Ann; Deery, Chris

    2015-12-01

    Enamel opacities can appear as white, cream, yellow or brown patches. They can result from developmental or acquired conditions. The diagnosis, severity of the opacity and patient's desire for treatment guide the clinician when choosing the correct management option. Microabrasion is indicated for surface opacities, whereas bleaching can treat opacities deep within the tooth. When these techniques have failed to achieve the desired result, camouflaging the opacity with composite resin may be useful. Novel techniques, such as infiltrating or sealing the opacity, can alter enamel's refractive index, offering further treatment choices. CPD/Clinical Relevance: There are many conservative treatments available which can improve the appearance of enamel opacities. PMID:26856002

  6. Unifying Water Data Sources: How the CUAHSI Water Data Center is Enabling and Improving Access to a Growing Catalog of over 100 Data Providers

    NASA Astrophysics Data System (ADS)

    Pollak, J.; Berry, K.; Couch, A.; Arrigo, J.; Hooper, R. P.

    2013-12-01

    features of the CUAHSI-HIS which make it particularly appropriate for providing unified access to several sources of water data. A growing community of researchers and educators are employing these tools for education; including sharing best practices around creating modules, supporting researchers and educators in accessing the services, and cataloging and sharing modules. The CUAHSI WDC is a community governed organization. Our agenda is driven by the community's voice through a Board of Directors and committees that decide strategic direction (new products), tactical decisions (product improvement), and evaluation of usability. By providing the aforementioned services within a community driven framework, we believe the WDC is providing critical services that include improving water data discoverability, accessibility and usability within a sustainable governance structure.

  7. Relativistic opacities for astrophysical applications

    NASA Astrophysics Data System (ADS)

    Fontes, C. J.; Fryer, C. L.; Hungerford, A. L.; Hakel, P.; Colgan, J.; Kilcrease, D. P.; Sherrill, M. E.

    2015-09-01

    We report on the use of the Los Alamos suite of relativistic atomic physics codes to generate radiative opacities for the modeling of astrophysically relevant plasmas under local thermodynamic equilibrium (LTE) conditions. The atomic structure calculations are carried out in fine-structure detail, including full configuration interaction. Three example applications are considered: iron opacities at conditions relevant to the base of the solar convection zone, nickel opacities for the modeling of stellar envelopes, and samarium opacities for the modeling of light curves produced by neutron star mergers. In the first two examples, comparisons are made between opacities that are generated with the fully and semi-relativistic capabilities in the Los Alamos suite of codes. As expected for these highly charged, iron-peak ions, the two methods produce reasonably similar results, providing confidence that the numerical methods have been correctly implemented. However, discrepancies greater than 10% are observed for nickel and investigated in detail. In the final application, the relativistic capability is used in a preliminary investigation of the complicated absorption spectrum associated with cold lanthanide elements.

  8. Enhancement of Mutual Discovery, Search, and Access of Data for Users of NASA and GEOSS-Cataloged Data Systems

    NASA Astrophysics Data System (ADS)

    Teng, W. L.; Maidment, D. R.; Rodell, M.; Strub, R. F.; Arctur, D. K.; Ames, D. P.; Vollmer, B.; Seiler, E.

    2014-12-01

    An ongoing NASA-funded project has removed a longstanding barrier to accessing NASA data (i.e., accessing archived time-step array data as point-time series) for selected variables of the North American and Global Land Data Assimilation Systems (NLDAS and GLDAS, respectively) and other EOSDIS (Earth Observing System Data Information System) data sets. These time series ("data rods") are pre-generated or generated on-the-fly (OTF), leveraging the NASA Simple Subset Wizard (SSW), a gateway to NASA data centers. Data rods Web services are accessible through the CUAHSI Hydrologic Information System (HIS) and the Goddard Earth Sciences Data and Information Services Center (GES DISC) but are not easily discoverable by users of other non-NASA data systems. The Global Earth Observation System of Systems (GEOSS) is a logical mechanism for providing access to the data rods, both pre-generated and OTF. There is an ongoing series of multi-organizational GEOSS Architecture Implementation Pilots, now in Phase-7 (AIP-7) and with a strong water sub-theme, that is aimed at the GEOSS Water Strategic Target "to produce [by 2015] comprehensive sets of data and information products to support decision-making for efficient management of the world's water resources, based on coordinated, sustained observations of the water cycle on multiple scales." The aim of this "GEOSS Water Services" project is to develop a distributed, global registry of water data, map, and modeling services catalogued using the standards and procedures of the Open Geospatial Consortium and the World Meteorological Organization. This project has already demonstrated that the GEOSS infrastructure can be leveraged to help provide access to time series of model grid information (e.g., NLDAS, GLDAS) or grids of information over a geographical domain for a particular time interval. A new NASA-funded project was begun, to expand on these early efforts to enhance the discovery, search, and access of NASA data by non

  9. The Chandra Source Catalog

    NASA Astrophysics Data System (ADS)

    Evans, Ian N.; Primini, Francis A.; Glotfelty, Kenny J.; Anderson, Craig S.; Bonaventura, Nina R.; Chen, Judy C.; Davis, John E.; Doe, Stephen M.; Evans, Janet D.; Fabbiano, Giuseppina; Galle, Elizabeth C.; Gibbs, Danny G., II; Grier, John D.; Hain, Roger M.; Hall, Diane M.; Harbo, Peter N.; (Helen He, Xiangqun; Houck, John C.; Karovska, Margarita; Kashyap, Vinay L.; Lauer, Jennifer; McCollough, Michael L.; McDowell, Jonathan C.; Miller, Joseph B.; Mitschang, Arik W.; Morgan, Douglas L.; Mossman, Amy E.; Nichols, Joy S.; Nowak, Michael A.; Plummer, David A.; Refsdal, Brian L.; Rots, Arnold H.; Siemiginowska, Aneta; Sundheim, Beth A.; Tibbetts, Michael S.; Van Stone, David W.; Winkelman, Sherry L.; Zografou, Panagoula

    2010-07-01

    The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. The first release of the CSC includes information about 94,676 distinct X-ray sources detected in a subset of public Advanced CCD Imaging Spectrometer imaging observations from roughly the first eight years of the Chandra mission. This release of the catalog includes point and compact sources with observed spatial extents lsim30''. The catalog (1) provides access to the best estimates of the X-ray source properties for detected sources, with good scientific fidelity, and directly supports scientific analysis using the individual source data; (2) facilitates analysis of a wide range of statistical properties for classes of X-ray sources; and (3) provides efficient access to calibrated observational data and ancillary data products for individual X-ray sources, so that users can perform detailed further analysis using existing tools. The catalog includes real X-ray sources detected with flux estimates that are at least 3 times their estimated 1σ uncertainties in at least one energy band, while maintaining the number of spurious sources at a level of lsim1 false source per field for a 100 ks observation. For each detected source, the CSC provides commonly tabulated quantities, including source position, extent, multi-band fluxes, hardness ratios, and variability statistics, derived from the observations in which the source is detected. In addition to these traditional catalog elements, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively, including source images, event lists, light curves, and spectra from each observation in which a

  10. Electronic Catalog Of Extragalactic Objects

    NASA Technical Reports Server (NTRS)

    Helou, George; Madore, Barry F.

    1993-01-01

    NASA/IPAC Extragalactic Database (NED) is publicly accessible computerized catalog of published information about extragalactic observations. Developed to accommodate increasingly large sets of data from surveys, exponentially growing literature, and trend among astronomers to take multispectral approach to astrophysical problems. Accessible to researchers and librarians.

  11. Group B streptococcal opacity variants.

    PubMed Central

    Pincus, S H; Cole, R L; Wessels, M R; Corwin, M D; Kamanga-Sollo, E; Hayes, S F; Cieplak, W; Swanson, J

    1992-01-01

    Colony opacity variants were detected for type III group B streptococci (GBS). Transparent colonies predominate in the parent GBS, with occasional colonies having opaque portions. Two stable opaque variants (1.1 and 1.5) were compared with three transparent clones (1.2, 1.3, and 1.4). All grew well on blood agar and on GC medium, but variant 1.1 failed to grow on Todd-Hewitt medium. Scanning and transmission electron microscopy demonstrated that colony opacity correlated with bacterial aggregation status, with opaque variants forming longer and more organized chains. Opaque-transparent switches were observed in both directions for most variants, with transparent to opaque noted most frequently, but 1.5 did not switch at all. Switching of the opacity phenotype was observed both in vitro and in neonatal mice. Relationships between colony opacity and several cell surface phenomena were explored. (i) Opaque variant 1.1 had two surface proteins (46 and 75 kDa) that were either unique or greatly overexpressed. (ii) Variant 1.1 was deficient in type III polysaccharide, while 1.5 lacked group B antigen. Diminished capsular polysaccharide of variant 1.1 was reflected in reduced negative electrophoretic mobility and in increased buoyant density. (iii) Transparent variant colonies growing closest to a penicillin disk were opaque, but colonial variants did not differ in their sensitivity to penicillin. These data indicate that GBS can exist in both opaque and transparent forms, with opaque appearance occurring by multiple routes. Opaque variants grow poorly on Todd-Hewitt medium generally used for isolation of GBS, so any possible relationships between opacity variation and pathogenesis of GBS infection are unknown. Images PMID:1592825

  12. Interoperability Between Geoscience And Geospatial Catalog Protocols

    NASA Astrophysics Data System (ADS)

    Hu, C.; di, L.; Yang, W.; Lynnes, C.; Domenico, B.; Rutledge, G. K.; Enloe, Y.

    2007-12-01

    In the past several years, interoperability gaps have made cross-protocol and cross-community data access a challenge within the Earth science community. One such gap is between two protocol families developed within the geospatial and Earth science communities. The Earth science community has developed a family of related geoscience protocols that includes OPeNDAP for data access and the Thematic Real-time Environmental Distributed Data Services (THREDDS) catalog capability. The corresponding protocols in the geospatial community are the Open Geospatial Consortium (OGC) protocols Web Coverage Service for geospatial data access and Catalog Services for Web (CSW) for data search. We have developed a catalog gateway to mediate client/server interactions between OGC catalog clients and THREDDS servers. In essence, the gateway is an OGC Catalog server that enables OGC clients to search for data registered in THREDDS catalogs. The gateway comprises two parts: the CSW server and a THREDDS-to-CSW ingestion tool. There are two key challenges in constructing such gateway, the first is to define the mapping relationship between the catalog metadata schema of CSW and that of the THREDDS, and the second one is to ingest the THREDDS catalog content into the CSW server. Since our CSW server is based on the ISO19115/ISO19119 Application Profile, a key challenge is to semantically map the ISO 19115 metadata attributes in ISO Application Profile to the THREDDS metadata attributes in the THREDDS Dataset Inventory Catalog Specification Version 1.0. With the mapping established, tools that translate the THREDDS catalog information model into the CSW/ISO Profile information model were developed. These dynamically poll THREDDS catalog servers and ingest the THREDDS catalog information into the CSW server's database, maintaining the hierarchical relationships inherent in the THREDDS catalogs. A prototype system has been implemented to demonstrate the concept and approach.

  13. In Search of a Really "Next Generation" Catalog

    ERIC Educational Resources Information Center

    Singer, Ross

    2008-01-01

    Ever since North Carolina State University Libraries launched their Endeca-based OPAC replacement in the beginning of 2006, the library world has been completely obsessed with ditching their old, tired catalog interfaces (and with good reason) for the greener pastures of more sophisticated indexing, more accurate relevance ranking, dust jackets,…

  14. How Next-Gen R U? A Review of Academic OPACs in the United States and Canada

    ERIC Educational Resources Information Center

    Hofmann, Melissa A.; Yang, Sharon Q.

    2011-01-01

    As a concept, the next-generation catalog (NGC) is not new to librarians, who have been wishing for better OPAC interfaces for their integrated library systems (ILSs). The NGC has been the focus of discussion for more than 5 years now, from the 2006 report of the implementation of Endeca at North Carolina State University, to Marshall Breeding's…

  15. The Chandra Source Catalog

    NASA Astrophysics Data System (ADS)

    Evans, Ian N.; Primini, F. A.; Glotfelty, K. J.; Anderson, C. S.; Bonaventura, N. R.; Chen, J. C.; Davis, J. E.; Doe, S. M.; Evans, J. D.; Fabbiano, G.; Galle, E. C.; Gibbs, D. G., II; Grier, J. D.; Hain, R. M.; Hall, D. M.; Harbo, P. N.; He, X.; Houck, J. C.; Karovska, M.; Kashyap, V. L.; Lauer, J.; McCollough, M. L.; McDowell, J. C.; Miller, J. B.; Mitschang, A. W.; Morgan, D. L.; Mossman, A. E.; Nichols, J. S.; Nowak, M. A.; Plummer, D. A.; Refsdal, B. L.; Rots, A. H.; Siemiginowska, A.; Sundheim, B. A.; Tibbetts, M. S.; Van Stone, D. W.; Winkelman, S. L.; Zografou, P.

    2010-03-01

    The Chandra Source Catalog (CSC) is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. The first release of the CSC includes information about 94,676 distinct X-ray sources detected in a subset of public ACIS imaging observations from roughly the first eight years of the Chandra mission. This release of the catalog includes point and compact sources with observed spatial extents < 30". The catalog (1) provides access to estimates of the X-ray source properties for detected sources with good scientific fidelity; (2) facilitates analysis of a wide range of statistical properties for classes of X-ray sources; and (3) provides efficient access to calibrated observational data and ancillary data products for individual X-ray sources. The catalog includes real X-ray sources detected with flux estimates that are at least 3 times their estimated 1σ uncertainties in at least one energy band, while maintaining the number of spurious sources at a level of < 1 false source per field for a 100 ks observation. For each detected source, the CSC provides commonly tabulated quantities, including source position, extent, multi-band fluxes, hardness ratios, and variability statistics. In addition, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively, including source images, event lists, light curves, and spectra. Support for development of the CSC is provided by the National Aeronautics and Space Administration through the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics and Space Administration under contract NAS 8-03060.

  16. The Chandra Source Catalog

    NASA Astrophysics Data System (ADS)

    Evans, Ian; Primini, Francis A.; Glotfelty, Kenny J.; Anderson, Craig S.; Bonaventura, Nina R.; Chen, Judy C.; Davis, John E.; Doe, Stephen M.; Evans, Janet D.; Fabbiano, Giuseppina; Galle, Elizabeth C.; Gibbs, Danny G., II; Grier, John D.; Hain, Roger; Hall, Diane M.; Harbo, Peter N.; He, Xiang Qun (Helen); Houck, John C.; Karovska, Margarita; Kashyap, Vinay L.; Lauer, Jennifer; McCollough, Michael L.; McDowell, Jonathan C.; Miller, Joseph B.; Mitschang, Arik W.; Morgan, Douglas L.; Mossman, Amy E.; Nichols, Joy S.; Nowak, Michael A.; Plummer, David A.; Refsdal, Brian L.; Rots, Arnold H.; Siemiginowska, Aneta L.; Sundheim, Beth A.; Tibbetts, Michael S.; van Stone, David W.; Winkelman, Sherry L.; Zografou, Panagoula

    2009-09-01

    The first release of the Chandra Source Catalog (CSC) was published in 2009 March, and includes information about 94,676 X-ray sources detected in a subset of public ACIS imaging observations from roughly the first eight years of the Chandra mission. This release of the catalog includes point and compact sources with observed spatial extents <˜30''.The CSC is a general purpose virtual X-ray astrophysics facility that provides access to a carefully selected set of generally useful quantities for individual X-ray sources, and is designed to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime.The catalog (1) provides access to the best estimates of the X-ray source properties for detected sources, with good scientific fidelity, and directly supports medium sophistication scientific analysis on using the individual source data; (2) facilitates analysis of a wide range of statistical properties for classes of X-ray sources; (3) provides efficient access to calibrated observational data and ancillary data products for individual X-ray sources, so that users can perform detailed further analysis using existing tools; and (4) includes real X-ray sources detected with flux significance greater than a predefined threshold, while maintaining the number of spurious sources at an acceptable level. For each detected X-ray source, the CSC provides commonly tabulated quantities, including source position, extent, multi-band fluxes, hardness ratios, and variability statistics, derived from the observations in which the source is detected. In addition to these traditional catalog elements, for each X-ray source the CSC includes an extensive set of file-based data products that can be manipulated interactively, including source images, event lists, light curves, and spectra from each observation in which a source is detected.

  17. The Chandra Source Catalog

    NASA Astrophysics Data System (ADS)

    Evans, Ian N.; Primini, F. A.; Glotfelty, K. J.; Anderson, C. S.; Bonaventura, N. R.; Chen, J. C.; Davis, J. E.; Doe, S. M.; Evans, J. D.; Fabbiano, G.; Galle, E.; Gibbs, D. G.; Grier, J. D.; Hain, R.; Hall, D. M.; Harbo, P. N.; He, X.; Houck, J. C.; Karovska, M.; Lauer, J.; McCollough, M. L.; McDowell, J. C.; Miller, J. B.; Mitschang, A. W.; Morgan, D. L.; Nichols, J. S.; Nowak, M. A.; Plummer, D. A.; Refsdal, B. L.; Rots, A. H.; Siemiginowska, A. L.; Sundheim, B. A.; Tibbetts, M. S.; Van Stone, D. W.; Winkelman, S. L.; Zografou, P.

    2009-01-01

    The Chandra Source Catalog (CSC) is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory. When compared to all previous and current X-ray missions, Chandra breaks the resolution barrier with an arcsecond scale on-axis point spread function. The combination of excellent spatial resolution, a reasonable field of view, and low instrumental background translate into a high detectable-source density, with low confusion and good astrometry. The wealth of information that can be extracted from identified serendipitous sources is a powerful and valuable resource for astronomy. The aim of the CSC is to disseminate this wealth of information by characterizing the X-ray sky as seen by Chandra. The CSC provides simple access to Chandra data for individual sources or sets of sources matching user-specified search criteria. The catalog is intended to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. For each detected X-ray source, the catalog lists the source position and a detailed set of source properties, including multi-band aperture fluxes, X-ray colors and hardness ratios, spectra, temporal variability information, and source extent estimates. In addition to these traditional elements, the catalog includes file-based data products that can be manipulated interactively, including images, photon event lists, light curves, and spectra for each source individually from each observation in which a source is detected. The first release of the CSC includes information for 150,000 X-ray sources detected in a subset of public imaging observations from the first eight years of the Chandra mission. Only point sources, and compact sources with extents < 30 arcsec, are included. Highly extended sources, and sources located in selected fields containing bright, highly extended sources, are excluded from this release. This work is supported by NASA contract NAS

  18. SKYMAP system description: Star catalog data base generation and utilization

    NASA Technical Reports Server (NTRS)

    Gottlieb, D. M.

    1979-01-01

    The specifications, design, software description, and use of the SKYMAP star catalog system are detailed. The SKYMAP system was developed to provide an accurate and complete catalog of all stars with blue or visual magnitudes brighter than 9.0 for use by attitude determination programs. Because of the large number of stars which are brighter than 9.0 magnitude, efficient techniques of manipulating and accessing the data were required. These techniques of staged distillation of data from a Master Catalog to a Core Catalog, and direct access of overlapping zone catalogs, form the basis of the SKYMAP system. The collection and tranformation of data required to produce the Master Catalog data base is described. The data flow through the main programs and levels of star catalogs is detailed. The mathematical and logical techniques for each program and the format of all catalogs are documented.

  19. Open-Source Tools for Enhancing Full-Text Searching of OPACs: Use of Koha, Greenstone and Fedora

    ERIC Educational Resources Information Center

    Anuradha, K. T.; Sivakaminathan, R.; Kumar, P. Arun

    2011-01-01

    Purpose: There are many library automation packages available as open-source software, comprising two modules: staff-client module and online public access catalogue (OPAC). Although the OPAC of these library automation packages provides advanced features of searching and retrieval of bibliographic records, none of them facilitate full-text…

  20. Collections Define Cataloging's Future

    ERIC Educational Resources Information Center

    Simpson, Betsy

    2007-01-01

    The role of catalogers within academic libraries is evolving to meet new demands and cultivating a broader understanding of cataloging--one that focuses on collections, not the catalog, and applies cataloger expertise across metadata activities. Working collaboratively as never before, catalogers are reinventing their place within the library.

  1. Management of Catalogs at CDS

    NASA Astrophysics Data System (ADS)

    Landais, G.; Boch, T.; Brouty, M.; Guéhenneux, S.; Genova, F.; Lesteven, S.; Ochsenbein, F.; Ocvirk, P.; Perret, E.; Pineau, F.-X.; Simon, A.-C.; Vannier, P.

    2015-04-01

    VizieR (Ochsenbein et al. 2000) provides access to the most complete library of published astronomical catalogs (data tables and associated data) available online and organized in a self-documented database. (There were 11769 catalogs in November 2013.) Indexing the metadata in the VizieR search engine requires the expertise of scientists and documentalists for each catalog ingested. The metadata go into an efficient position search engine that is adapted to big data. (For instance, the GAIA simulation catalog has more than two billion objects). Information in VizieR tables is well described and can be retrieved easily. The search results provide visibility to catalogs with tools and protocols to disseminate data to the Virtual Observatory, thus giving scientists data that is reusable by dedicated tools (e.g. image vizualisation tools). Also, new functionality allows users to extract all photometric data in catalogs for a given position. Finally, it is also through cross-identification tools that the CDS becomes a partner in producing large data sets, such as GAIA.

  2. Accessibility

    MedlinePlus

    ... www.nlm.nih.gov/medlineplus/accessibility.html MedlinePlus Accessibility To use the sharing features on this page, ... Subscribe to RSS Follow us Disclaimers Copyright Privacy Accessibility Quality Guidelines Viewers & Players MedlinePlus Connect for EHRs ...

  3. MC and A instrumentation catalog

    SciTech Connect

    Neymotin, L.; Sviridova, V.

    1998-06-01

    In 1981 and 1985, two editions of a catalog of non-destructive nuclear measurement instrumentation, and material control and surveillance equipment, were published by Brookhaven National Laboratory (BNL). The last edition of the catalog included one hundred and twenty-five entries covering a wide range of devices developed in the US and abroad. More than ten years have elapsed since the publication of the more recent Catalog. Devices described in it have undergone significant modifications, and new devices have been developed. Therefore, in order to assist specialists in the field of Material Control and Accounting (MC and A), a new catalog has been created. Work on this instrumentation catalog started in 1997 as a cooperative effort of Brookhaven National Laboratory (BNL), operated by Brookhaven Science Associates under contract to the US Department of Energy, and the All-Russian Research Institute of Automatics (VNIIA), subordinate institute of the Atomic Energy Ministry of the Russian Federation, within the collaborative US-Russia Material Protection, Control, and Accounting (MPC and A) Program. Most of the equipment included in the Catalog are non-destructive assay (NDA) measurement devices employed for purposes of accounting, confirmation, and verification of nuclear materials. Other devices also included in the Catalog are employed in the detection and deterrence of unauthorized access to or removal of nuclear materials (material control: containment and surveillance). Equipment found in the Catalog comprises either: (1) complete devices or systems that can be used for MC and A applications; or (2) parts or components of complete systems, such as multi-channel analyzers, detectors, neutron generators, and software. All devices are categorized by their status of development--from prototype to serial production.

  4. Printing and the Online Catalog.

    ERIC Educational Resources Information Center

    Price, Bennett J.

    1984-01-01

    Discusses issues involved in offering printing for online library catalogs and weighs advantages and disadvantages of screen printing versus remote printing--speed, quality, privacy, convenience, noise, control, costs, accessibility and service. Additional technical issues discussed are buffered versus unbuffered asynchronous printer ports,…

  5. Cataloging of Original Materials in the 21st Century: Frequency and Preparation Factors

    ERIC Educational Resources Information Center

    Fuller, Daniel

    2006-01-01

    Cataloging and catalogers play an important role in the access to electronic catalogs for users at all levels. Two recent studies investigating the preparation of entry level library media specialists and the frequency they perform original cataloging led to a larger examination of the topic in the context of academic libraries. One factor has…

  6. Computational Design of Short Pulse Laser Driven Iron Opacity Experiments

    NASA Astrophysics Data System (ADS)

    Martin, Madison E.; London, Richard A.; Goluoglu, Sedat; Whitley, Heather D.

    2015-11-01

    Opacity is a critical parameter in the transport of radiation in systems such as inertial confinement fusion capsules and stars. The resolution of current disagreements between solar models and helioseismological observations would benefit from experimental validation of theoretical opacity models. Short pulse lasers can be used to heat targets to higher temperatures and densities than long pulse lasers and pulsed power machines, thus potentially enabling access to emission spectra at conditions relevant to solar models. In order to ensure that the relevant plasma conditions are accessible and that an emission measurement is practical, we use computational design of experiments to optimize the target characteristics and laser conditions. Radiation-hydrodynamic modeling, using HYDRA, is used to investigate the effects of modifying laser irradiance, target dimensions, and dopant dilution on the plasma conditions and emission of an iron opacity target. Several optimized designs reaching temperatures and densities relevant to the radiative zone of the sun will be discussed. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Lawrence Livermore National Security, LLC.

  7. Preparing for the Use of Classification in Online Cataloging Systems and in Online Catalogs.

    ERIC Educational Resources Information Center

    Cochrane, Pauline A.; Markey, Karen

    1985-01-01

    Presents overview of library classification and automation (1940-84), including use of Dewey Decimal and Library of Congress classification in online cataloging systems. Highlights include classification number access in existing online catalogs, functions of classification records, specifications for authority file records, and the nature of…

  8. Stellar-opacity calculations. II. Lecture 3

    SciTech Connect

    Cox, A.N.

    1983-03-14

    We turn to the effects on opacities of atomic lines and molecular bands. It was the realization that these atomic lines were important for the opacity and the radiation flow in stars that allowed the field of stellar evolution to greatly flower in the 1960's and 1970's. Our understanding of stellar structure and evolution is now very deep.

  9. Biometrics between opacity and transparency.

    PubMed

    Gutwirth, Serge

    2007-01-01

    The overall aim of the democratic constitutional state is to protect a social order in which the individual liberty of the citizen is a major concern. As a consequence the democratic constitutional state should guarantee simultaneously and paradoxically a high level of individual freedom and an order in which such freedom is made possible and guaranteed. Biometrics provide a strong and expressive example both of the necessity to address the issue of opacity and transparency and the complexity of the process. Indeed, the large scale use of biometrics does not only question the position of the individual in society, but it also alters the architecture or nature of this society as such. PMID:17536155

  10. Observational Constraints on Submillimeter Dust Opacity

    NASA Astrophysics Data System (ADS)

    Shirley, Yancy L.; Huard, Tracy L.; Pontoppidan, Klaus M.; Wilner, David J.; Stutz, Amelia M.; Bieging, John H.; Evans, Neal J., II

    2011-02-01

    Infrared extinction maps and submillimeter dust continuum maps are powerful probes of the density structure in the envelope of star-forming cores. We make a direct comparison between infrared and submillimeter dust continuum observations of the low-mass Class 0 core, B335, to constrain the ratio of submillimeter to infrared opacity (κsmm/κir) and the submillimeter opacity power-law index (κ vprop λ-β). Using the average value of theoretical dust opacity models at 2.2 μm, we constrain the dust opacity at 850 and 450 μm. Using new dust continuum models based upon the broken power-law density structure derived from interferometric observations of B335 and the infall model derived from molecular line observations of B335, we find that the opacity ratios are \\frac{\\kappa _{850}}{\\kappa _{2.2}} = (3.21{--}4.80)^{+0.44}_{-0.30} \\times 10^{-4} and \\frac{\\kappa _{450}}{\\kappa _{2.2}} = (12.8{--}24.8)^{+2.4}_{-1.3} \\times 10^{-4}with a submillimeter opacity power-law index of βsmm = (2.18-2.58)+0.30 -0.30. The range of quoted values is determined from the uncertainty in the physical model for B335. For an average 2.2 μm opacity of 3800 ± 700 cm2 g-1, we find a dust opacity at 850 and 450 μm of κ850 = (1.18-1.77)+0.36 -0.24 and κ450 = (4.72-9.13)+1.9 -0.98 cm2 g-1 of dust. These opacities are from (0.65-0.97)κOH5 850 of the widely used theoretical opacities of Ossenkopf and Henning for coagulated ice grains with thin mantles at 850 μm.

  11. Centralized automated cataloging of health science materials in the MLC/SUNY/OCLC shared cataloging service.

    PubMed Central

    Raper, J E

    1977-01-01

    Since February 1976, The Medical Library Center of New York, with the assistance of the SUNY/OCLC Network, has offered, on a subscription basis, a centralized automated cataloging service to health science libraries in the greater metropolitan New York area. By using workforms and prints of OCLC record (amended by the subscribing participants), technical services personnel at the center have fed cataloging data, via a CRT terminal, into the OCLC system, which provides (1) catalog cards, received in computer filing order; (2) book card, spine, and pocket labels; (3) accessions lists; and (4) data for eventual production of book catalogs and union catalogs. The experience of the center in the development, implementation, operation, and budgeting of its shared cataloging service is discussed. PMID:843650

  12. An Expert System Approach to Online Catalog Subject Searching.

    ERIC Educational Resources Information Center

    Khoo, Christopher S. G.; Poo, Danny C. C.

    1994-01-01

    Reviews methods to improve online catalogs for subject searching and describes the design of an expert system front-end to improve subject access in online public access catalogs that focuses on search strategies. Implementation of a prototype system at the National University of Singapore is described, and reformulation strategies are discussed.…

  13. Cataloging in Publication

    ERIC Educational Resources Information Center

    Clapp, Verner W.

    1973-01-01

    The cataloging in source experiment of the United States Library of Congress ended in 1959. Studies on the feasibility of another pre-publication cataloging program were undertaken and a new cataloging in publication program was started in 1971. Other programs for pre-publication cataloging in Brazil and Russia are described. (21 references)…

  14. Records for Electronic Databases in the Online Catalog at Middle Tennessee State University

    ERIC Educational Resources Information Center

    Geckle, Beverly J.; Pozzebon, Mary Ellen; Williams, Jo

    2008-01-01

    This article recounts a project at the Middle Tennessee State University library to include records for electronic databases in the online catalog. Although electronic databases are accessible via the library's Databases A-Z list and related subject guides, cataloging these resources also provides access via the online catalog, allowing more of…

  15. Catalog Federation and Interoperability for Geoinformatics

    NASA Astrophysics Data System (ADS)

    Memon, A.; Lin, K.; Baru, C.

    2008-12-01

    With the increasing proliferation of online resources in the geosciences, including data, tools, and software services, there is also a proliferation of catalogs containing metadata that describe these resources. To realize the vision articulated in the NSF Workshop on Building a National Geoinformatics System, March 2007-where a user can sit at a terminal and easily search, discover, integrate and use distributed geoscience resources-it will be essential that a search request be able to traverse these multiple metadata catalogs. In this paper, we describe our effort at prototyping catalog interoperability across multiple metadata catalogs. An example of a metadata catalog is the one employed in the GEON Project (www.geongrid.org). The central GEON catalog can be searched using spatial, temporal, and other metadata-based search criteria. The search can be invoked as a Web service and, therefore, can be imbedded in any software application. There has been a requirement from some of the GEON collaborators (for example, at the University of Hyderabad, India and the Navajo Technical College, New Mexico) to deploy their own catalogs, to store information about their resources locally, while they publish some of this information for broader access and use. Thus, a search must now be able to span multiple, independent GEON catalogs. Next, some of our collaborators-e.g. GEO Grid (Global Earth Observations Grid) in Japan-are implementing the Catalog Services for the Web (CS-W) standard for their catalog, thereby requiring the search to span across catalogs implemented using the CS-W standard as well. Finally, we have recently deployed a search service to access all EarthScope data products, which are distributed across organizations in Seattle, WA (IRIS), Boulder, CO (UNAVCO), and Potsdam, Germany (ICDP/GFZ). This service essentially implements a virtual catalog (the actual catalogs and data are stored at the remote locations). So, there is the need to incorporate such 3rd

  16. New Generation of Los Alamos Opacity Tables

    NASA Astrophysics Data System (ADS)

    Colgan, James; Kilcrease, D. P.; Magee, N. H.; Sherrill, M. E.; Abdallah, J.; Hakel, P.; Fontes, C. J.; Guzik, J. A.; Mussack, K. A.

    2016-05-01

    We present a new generation of Los Alamos OPLIB opacity tables that have been computed using the ATOMIC code. Our tables have been calculated for all 30 elements from hydrogen through zinc and are publicly available through our website. In this poster we discuss the details of the calculations that underpin the new opacity tables. We also show several recent applications of the use of our opacity tables to solar modeling and other astrophysical applications. In particular, we demonstrate that use of the new opacities improves the agreement between solar models and helioseismology, but does not fully resolve the long-standing `solar abundance' problem. The Los Alamos National Laboratory is operated by Los Alamos National Security, LLC for the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC5206NA25396.

  17. PERFORMANCE AUDIT PROCEDURES FOR OPACITY MONITORS

    EPA Science Inventory

    The manual contains monitor-specific performance audit procedures and data forms for use in conducting audits of installed opacity continuous emission monitoring systems (CEMS). General auditing procedures and acceptance limits for various audit criteria are discussed. Practical ...

  18. Thermal infrared opacity of the Mars atmosphere

    SciTech Connect

    Martin, T.Z.

    1986-04-01

    An analytical technique is presented for the deriving Mars atmosphere opacity from data furnished by the IR Thermal Mapper (IRTM) instruments on the Viking landers. Each IRTM features four telescopes for viewing Mars in six spectral bands and seven spatial fields of view. The present study focuses on 20 microns measurements of the thermal inertia, 0.3-3.0 microns data for the surface albedo, and, finally, the 7, 9, and 15 microns data for the actual opacity derivations. The model takes into account the atmospheric temperature profile, scattering by dust, the surface emissivity and the variation of the surface/atmosphere temperature discontinuity. Analyses are carried out of the possible error factors and the model is used to generate opacity histories for the two Viking Lander sites. The results, when compared with other astronomical data, indicate that the method is sufficiently accurate to use opacity data to analyze the processes of storm genesis and to study local storms. 26 references.

  19. X ray opacity in cluster cooling flows

    NASA Technical Reports Server (NTRS)

    Wise, Michael W.; Sarazin, Craig L.

    1993-01-01

    We have calculated the emergent x-ray properties for a set of spherically symmetric, steady-state cluster cooling flow models including the effects of radiative transfer. Opacity due to resonant x-ray lines, photoelectric absorption, and electron scattering have been included in these calculations, and homogeneous and inhomogeneous gas distributions were considered. The effects of photoionization opacity are small for both types of models. In contrast, resonant line optical depths can be quite high in both homogeneous and inhomogeneous models. The presence of turbulence in the gas can significantly lower the line opacity. We find that integrated x-ray spectra for the flow cooling now are only slightly affected by radiative transfer effects. However x-ray line surface brightness profiles can be dramatically affected by radiative transfer. Line profiles are also strongly affected by transfer effects. The combined effects of opacity and inflow cause many of the lines in optically thick models to be asymmetrical.

  20. Modeling the SNL-Z Opacity Platform

    NASA Astrophysics Data System (ADS)

    Sherrill, Manolo; Wilde, Bernhard; Peterson, Darrell; Urbatsch, Todd; Hakel, Peter; Fontes, Chris; Bailey, James; Rochau, Gregory

    2015-11-01

    Driven by the need to validate computed opacity tables used for radiation hydrodynamic simulations, Los Alamos National Laboratory (LANL) and Sandia National Laboratories (SNL) have been involved in a collaboration to measure and characterize recorded opacities at the SNL-Z facility since 2009. The original success in measuring the spectral opacity of iron at a temperature of 156eV and at an electron density of 6.90x1021cm -3 (reported by J.E. Bailey et al. in PRL 99 265002 2007) led to an interest in expanding iron measurements to higher temperatures and densities to conditions consistent with those at the base of the convection zone of the Sun. To obtain these higher temperature/density conditions, the tamper masses that sandwich the metal foil of interest were increased. Several disturbing discrepancies exist between the higher temperature/density opacity measurements and theory and continue to be largely unresolved for the past several years (J. E. Bailey et al., NATURE 517 56 1 JAN. 2015). This continuing discrepancy has prompted LANL to perform detailed rad-hydro simulations of the SNL-Z opacity platform. In these simulations, both the dynamic hohlraum and the opacity target are modeled together. We report on the simulation methods and comparisons with dynamic hohlraum measurements that are used to assess the simulation fidelity.

  1. The OPAC Reborn: Electronic Content Belongs in the OPAC, at Least if We Want People to Find It

    ERIC Educational Resources Information Center

    McCracken, Peter

    2004-01-01

    One critical role of the catalog is to help librarians manage and track their inventory, whether it's books, videos, journals, microfilm reels, laptops, or even access to study rooms. The phrase, "if you can't track it, you don't own it," is quite real for the library that is trying to monitor thousands or millions of items. In the last decade,…

  2. The NLM current catalog.

    PubMed

    Wiggins, E V

    1969-01-01

    When the National Library of Medicine acquired a computer to augment its publication program, the intent was to present in one medium an index to journal articles and a catalog of books and new serial titles. The computer programs designed for indexing were unsatisfactory for cataloging, however; so two publications were issued, the Index Medicus and the NLM Current Catalog. The Current Catalog features separate name and subject sections, added volumes, and technical reports. The Express Cataloging Service was one of the first attempts to increase the speed and coverage of the Catalog. Shared cataloging with the Library of Congress, the Countway Library at Harvard, and the Upstate Medical Library in Syracuse, New York, have also contributed to the efforts toward improving this library service. An additional shared cataloging program, this time with the National Medical Audiovisual Center, is expected to be implemented shortly. PMID:5782262

  3. RADIATION TRANSPORT FOR EXPLOSIVE OUTFLOWS: OPACITY REGROUPING

    SciTech Connect

    Wollaeger, Ryan T.; Van Rossum, Daniel R. E-mail: daan@flash.uchicago.edu

    2014-10-01

    Implicit Monte Carlo (IMC) and Discrete Diffusion Monte Carlo (DDMC) are methods used to stochastically solve the radiative transport and diffusion equations, respectively. These methods combine into a hybrid transport-diffusion method we refer to as IMC-DDMC. We explore a multigroup IMC-DDMC scheme that in DDMC, combines frequency groups with sufficient optical thickness. We term this procedure ''opacity regrouping''. Opacity regrouping has previously been applied to IMC-DDMC calculations for problems in which the dependence of the opacity on frequency is monotonic. We generalize opacity regrouping to non-contiguous groups and implement this in SuperNu, a code designed to do radiation transport in high-velocity outflows with non-monotonic opacities. We find that regrouping of non-contiguous opacity groups generally improves the speed of IMC-DDMC radiation transport. We present an asymptotic analysis that informs the nature of the Doppler shift in DDMC groups and summarize the derivation of the Gentile-Fleck factor for modified IMC-DDMC. We test SuperNu using numerical experiments including a quasi-manufactured analytic solution, a simple 10 group problem, and the W7 problem for Type Ia supernovae. We find that opacity regrouping is necessary to make our IMC-DDMC implementation feasible for the W7 problem and possibly Type Ia supernova simulations in general. We compare the bolometric light curves and spectra produced by the SuperNu and PHOENIX radiation transport codes for the W7 problem. The overall shape of the bolometric light curves are in good agreement, as are the spectra and their evolution with time. However, for the numerical specifications we considered, we find that the peak luminosity of the light curve calculated using SuperNu is ∼10% less than that calculated using PHOENIX.

  4. Radiation Transport for Explosive Outflows: Opacity Regrouping

    NASA Astrophysics Data System (ADS)

    Wollaeger, Ryan T.; van Rossum, Daniel R.

    2014-10-01

    Implicit Monte Carlo (IMC) and Discrete Diffusion Monte Carlo (DDMC) are methods used to stochastically solve the radiative transport and diffusion equations, respectively. These methods combine into a hybrid transport-diffusion method we refer to as IMC-DDMC. We explore a multigroup IMC-DDMC scheme that in DDMC, combines frequency groups with sufficient optical thickness. We term this procedure "opacity regrouping." Opacity regrouping has previously been applied to IMC-DDMC calculations for problems in which the dependence of the opacity on frequency is monotonic. We generalize opacity regrouping to non-contiguous groups and implement this in SuperNu, a code designed to do radiation transport in high-velocity outflows with non-monotonic opacities. We find that regrouping of non-contiguous opacity groups generally improves the speed of IMC-DDMC radiation transport. We present an asymptotic analysis that informs the nature of the Doppler shift in DDMC groups and summarize the derivation of the Gentile-Fleck factor for modified IMC-DDMC. We test SuperNu using numerical experiments including a quasi-manufactured analytic solution, a simple 10 group problem, and the W7 problem for Type Ia supernovae. We find that opacity regrouping is necessary to make our IMC-DDMC implementation feasible for the W7 problem and possibly Type Ia supernova simulations in general. We compare the bolometric light curves and spectra produced by the SuperNu and PHOENIX radiation transport codes for the W7 problem. The overall shape of the bolometric light curves are in good agreement, as are the spectra and their evolution with time. However, for the numerical specifications we considered, we find that the peak luminosity of the light curve calculated using SuperNu is ~10% less than that calculated using PHOENIX.

  5. Arabic Online Catalog.

    ERIC Educational Resources Information Center

    Khurshid, Zahiruddin

    1992-01-01

    Discusses the processing of Arabic materials at the King Fahd University of Petroleum and Minerals (Saudi Arabia) library and describes the creation of an Arabic online catalog that supplements the catalog for non-Arabic materials. User needs are reviewed, library automation is discussed, and search strategies in the Arabic catalog are described.…

  6. Automation and Cataloging.

    ERIC Educational Resources Information Center

    Furuta, Kenneth; And Others

    1990-01-01

    These three articles address issues in library cataloging that are affected by automation: (1) the impact of automation and bibliographic utilities on professional catalogers; (2) the effect of the LASS microcomputer software on the cost of authority work in cataloging at the University of Arizona; and (3) online subject heading and classification…

  7. Mars landing site catalog

    NASA Technical Reports Server (NTRS)

    Greeley, Ronald (Editor)

    1990-01-01

    The catalog was compiled from material provided by the planetary community for areas on Mars that are of potential interest for future exploration. The catalog has been edited for consistency insofar as practical; however, the proposed scientific objectives and characteristics have not been reviewed. This is a working catalog that is being revised, updated, and expanded continually.

  8. OPACs and the Mobile Revolution

    ERIC Educational Resources Information Center

    Liston, Samuel

    2009-01-01

    Since the turn of the century, one of the hottest topics in the IT world has been the coming mobile revolution. While there's been some arguing over the details, the fundamental tenet of the mobile revolution is that lots and lots of people will start accessing web content from handheld portable devices instead of using a traditional laptop or…

  9. TOPS Opacities: Opacities of mixtures (calculated by TOPS« using LEDCOP« elemental opacities) and LEDCOP« Astrophysical Opacities mixed by TOPS«) from Los Alamos National Laboratory (LANL)

    DOE Data Explorer

    The LANL T-4 Group develops methods for and perform calculations of atomic structure, scattering cross sections, opacities, exotic atoms, and quantum and nonlinear optics, including effects of high energy density environments and interaction with external electromagnetic fields. The Opacity databases allow User chosen mixtures and/or elements and provide precalculated astrophysical mixtures.

    The Astrophysical Opacity data base contains opacity information for all elements from hydrogen to zinc, over a temperature range from 0.5 eV to 100 keV and a density range from 10-10 to 10+9 gm/cc. Every element has approximately 1500 (T-h) points, where T is the temperature and h is the electron degeneracy parameter, which characterizes the electron pressure of the plasma at the ion-plasma boundary. [Copied from LANL T-4 Opacity Web Page, Norman H. Magee, Jr. (T-4) and Robert E. H. Clark (X-CI), a Theoretical Self-Assessment Special Feature, May,1999. See LA-UR-99-336] (Specialized Interface)

  10. Online Catalog for Filament-Sigmoid Correlation

    NASA Astrophysics Data System (ADS)

    Merriot, Ivy; Pevtsov, A.; Martens, P.

    2007-05-01

    A new online catalog correlating H-alpha filaments with SXT sigmoids gives researchers, teachers and pre-college students the ability to access digital H-alpha images online that were previously available only at the physical location of the NSO at Sunspot, NM. This web-based catalog correlates SOHO's SXT sigmoids from 1993-1998 as described in a non-online catalog created by Zach Blehm under the direction of Richard Canfield, MSU-Bozeman, with H-alpha filament activity as described by Ivy Merriot under the direction of Alexei Pevtsov, NSO, and Petrus Martens, MSU-Bozeman. The H-alpha images were digitized from film archives of the Flare Patrol Telescope at Sunspot, NM. Use of the online catalog will be demonstrated at the poster site with critical comments encouraged.

  11. Starting Over: Current Issues in Online Catalog User Interface Design.

    ERIC Educational Resources Information Center

    Crawford, Walt

    1992-01-01

    Discussion of online catalogs focuses on issues in interface design. Issues addressed include understanding the user base; common user access (CUA) with personal computers; common command language (CCL); hyperlinks; screen design issues; differences from card catalogs; indexes; graphic user interfaces (GUIs); color; online help; and remote users.…

  12. Cataloging and Classifying Information Resources on the Internet.

    ERIC Educational Resources Information Center

    Woodward, Jeannette

    1996-01-01

    Librarians and information scientists have debated whether traditional cataloging methods can bring order to the Internet. Reviews literature on alternative strategies for organizing and accessing information resources on the Internet that incorporate some aspect of traditional library expertise, including library catalogs, subject trees,…

  13. Teaching the Cataloging of Non-Book Media.

    ERIC Educational Resources Information Center

    Frost, Carolyn O.

    1978-01-01

    Courses in cataloging nonbook media should include diverse cataloging codes and a wide variety of media. Related areas of concern include the objectives of an access system for nonbook media and the means by which these objectives are achievable. Films are used to illustrate this approach. (Author/MBR)

  14. An Experiment in Enhancing Catalog Records at Carnegie Mellon University.

    ERIC Educational Resources Information Center

    Michalak, Thomas J.

    1990-01-01

    Describes an experimental project at Carnegie Mellon University to enhance catalog records in order to improve the quality of the records and access to resources. Criteria for selecting books for enhanced cataloging and implementation of enhancement procedures are discussed. Several sample screen displays are included. (Three references) (MES)

  15. Sources of Machine-Readable Cataloging and Retrospective Conversion.

    ERIC Educational Resources Information Center

    McQueen, Judy; Boss, Richard W.

    1985-01-01

    This issue on current options in the area of machine-readable cataloging and retrospective conversion highlights generation and use of machine-readable bibliographic records, editing, standards, online and batch access, keying and coding, full-service cataloging and conversion, interlibrary loan, and authority control. Profiles of 22…

  16. InfoQUEST: An Online Catalog for Small Libraries.

    ERIC Educational Resources Information Center

    Campbell, Bonnie

    1984-01-01

    InfoQUEST is a microcomputer-based online public access catalog, designed for the small library handling file sizes up to 25,000 records. Based on the IBM-PC, or compatible machines, the system will accept downloading, in batch mode, of records from the library's file on the UTLAS Catalog Support System. (Author/EJS)

  17. Mexican Earthquakes and Tsunamis Catalog Reviewed

    NASA Astrophysics Data System (ADS)

    Ramirez-Herrera, M. T.; Castillo-Aja, R.

    2015-12-01

    Today the availability of information on the internet makes online catalogs very easy to access by both scholars and the public in general. The catalog in the "Significant Earthquake Database", managed by the National Center for Environmental Information (NCEI formerly NCDC), NOAA, allows access by deploying tabular and cartographic data related to earthquakes and tsunamis contained in the database. The NCEI catalog is the product of compiling previously existing catalogs, historical sources, newspapers, and scientific articles. Because NCEI catalog has a global coverage the information is not homogeneous. Existence of historical information depends on the presence of people in places where the disaster occurred, and that the permanence of the description is preserved in documents and oral tradition. In the case of instrumental data, their availability depends on the distribution and quality of seismic stations. Therefore, the availability of information for the first half of 20th century can be improved by careful analysis of the available information and by searching and resolving inconsistencies. This study shows the advances we made in upgrading and refining data for the earthquake and tsunami catalog of Mexico since 1500 CE until today, presented in the format of table and map. Data analysis allowed us to identify the following sources of error in the location of the epicenters in existing catalogs: • Incorrect coordinate entry • Place name erroneous or mistaken • Too general data that makes difficult to locate the epicenter, mainly for older earthquakes • Inconsistency of earthquakes and the tsunami occurrence: earthquake's epicenter located too far inland reported as tsunamigenic. The process of completing the catalogs directly depends on the availability of information; as new archives are opened for inspection, there are more opportunities to complete the history of large earthquakes and tsunamis in Mexico. Here, we also present new earthquake and

  18. HLINOP: Hydrogen LINe OPacity in stellar atmospheres

    NASA Astrophysics Data System (ADS)

    Barklem, P. S.; Piskunov, N.

    2015-07-01

    HLINOP is a collection of codes for computing hydrogen line profiles and opacities in the conditions typical of stellar atmospheres. It includes HLINOP for approximate quick calculation of any line of neutral hydrogen (suitable for model atmosphere calculations), based on the Fortran code of Kurucz and Peterson found in ATLAS9. It also includes HLINPROF, for detailed, accurate calculation of lower Balmer line profiles (suitable for detailed analysis of Balmer lines) and HBOP, to implement the occupation probability formalism of Daeppen, Anderson and Milhalas (1987) and thus account for the merging of bound-bound and bound-free opacity (used often as a wrapper to HLINOP for model atmosphere calculations).

  19. The Use of the Rare Book Cataloging Standards in the OCLC Database.

    ERIC Educational Resources Information Center

    Burns, Mary Ann

    In order to produce adequate catalog records for rare books, catalogers concern themselves with detailed transcription of title page information and an exact description of the book. Another concern largely unknown in general cataloging is the tracing of special access points that relate the physical features of a book and terms for persons…

  20. Minimal-Level Cataloging: A Look at the Issues--A Symposium.

    ERIC Educational Resources Information Center

    Horny, Karen L.; And Others

    1986-01-01

    Six articles on pros and cons of minimal-level cataloging (MLC) highlight patron access and browsability, time and cost savings, network and bibliographic utility cooperation, standards, alternatives to MLC, levels of records, online catalogs, experimental cataloging program at University of Michigan, and experiences at Kent State University…

  1. 40 CFR Figure 1 to Subpart Qqq of... - Data Summary Sheet for Determination of Average Opacity

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Average Opacity Clock time Number of converters blowing Converter aisle activity Average opacity for 1...) Average opacity for 1-minute interval blowing without visible emission interferences(percent)...

  2. Library Web OPACs in Pakistan: An Overview

    ERIC Educational Resources Information Center

    Mahmood, Khalid

    2008-01-01

    Purpose: This paper aims to analyse features and functions of indigenously developed web-based catalogues of academic, special and national libraries of Pakistan. Design/methodology/approach: The assessment of 16 OPACs is based on a 91-item checklist developed with the help of previous studies conducted in other countries. Findings: The paper…

  3. MECHANIZATION OF CATALOGING PROCEDURES.

    PubMed

    KILGOUR, F G

    1965-04-01

    The Columbia-Harvard-Yale Medical Libraries Computerization Project has put into operation its mechanized procedure for the production of catalog cards. Cards produced are in final form ready to be filed into a card catalog. Catalogers prepare copy on a worksheet from which punched cards are punched. An IBM 1401 computer processes the decklets of punched cards on magnetic tape to produce the expanded decklets of punched cards needed to print the various packs of catalog cards required to go into different catalogs. Next, the computer punches the expanded decklets of cards to operate an 870 Document Writer, which types out the catalog cards in final form. Cost of cards ready to file is 12.5 cents per card. PMID:14271110

  4. THE IRON PROJECT & Iron Opacity Project: Evidence of increased opacity for solar plasmas

    NASA Astrophysics Data System (ADS)

    Eissner, W.; Hala, -; Nahar, S.; Pradhan, A.; Bailey, J.

    2015-05-01

    The recently reported measurement1 of opacity of iron plasma at high energy density similar to that in the solar convection zone near the boundary of radiative zone shows enhanced continuum, and the integrated opacity is about 7% higher than that from prediction using the existing Opacity Project (OP) data for photoionization and oscillator strengths. This agrees toward 15% increment of opacity needed to explain the lower abundance of elements determined by 3D spectral analysis of solar observation. However, our later large-scale calculations that included strong resonances due to excitations to highly excited cores states for Fe XVII indicated significant amount of opacity missing in the OP data. We will present our latest findings on the importance of highly excited states on the opacity and how proper inclusion of resonances could enhance the continuum. These will have important impact on the composition of the Sun, the benchmark for astronomical objects. We will also present in progress work under the Iron Project on the collision strengths of Si IX obtained using relativistic effects in the Breit-Pauli R-matrix method and transition probabilities of fine structure transitions in Ti I.*Partial support: NSF, DO.

  5. Cataloging. ERIC Processing Manual, Section V.

    ERIC Educational Resources Information Center

    Brandhorst, Ted, Ed.

    Rules and guidelines are provided for ERIC catalogers and editors engaged in capturing bibliographic data on the documents and journal articles entered into the ERIC database. The material is organized by data element: Accession Number, Price Code, Pagination, Publication Date, Title, Journal Citation, Language, Publication Type, Descriptors,…

  6. A union catalog of monographs: another approach.

    PubMed

    Kronick, D A; Bowden, V M

    1978-07-01

    The rationale for and the production of the 1977 TALON Union Catalog of Monographs are described. The 158,859 records include the existing machine-readable records for six health sciences libraries plus the cataloging of six others, converted by matching other data bases and by keypunching. The method and costs of production are discussed. Use of Computer-Output-Microfiche (COM) significantly decreased the cost and time required for publication. The $.076 unit cost per entry, with both author and title access for the COM method, is almost one-half the unit cost for the previous method which offered only main-entry access. The TALON Catalog compares favorably with the Midwest Medical Union Catalog. The addition of the title index significantly increases its usefulness. However, the unique feature of the TALON Catalog may be its machine-readable form which offers the potential for quantitative analyses of health sciences library collections. Such data may be essential for rational management of limited library funds. PMID:678697

  7. Cataloging Practices in India: Efforts for Standardization.

    ERIC Educational Resources Information Center

    Tikku, Upinder Kumar

    1984-01-01

    Surveys current cataloging practices in Indian libraries and discusses standardization in cataloging, types of catalogs, cataloging codes (Anglo-American and Ranganathan), subject headings, descriptive cataloging, and standardization efforts (international, United States, USSR, Great Britain, India). Footnotes are included. (EJS)

  8. A New Detailed Term Accounting Opacity Code: TOPAZ

    SciTech Connect

    Iglesias, C A; Chen, M H; Isaacs, W; Sonnad, V; Wilson, B G

    2004-04-28

    A new opacity code, TOPAZ, which explicitly includes configuration term structure in the bound-bound transitions is being developed. The goal is to extend the current capabilities of detailed term accounting opacity codes such as OPAL that are limited to lighter elements of astrophysical interest. At present, opacity calculations of heavier elements use statistical methods that rely on the presence of myriad spectral lines for accuracy. However, statistical approaches have been shown to be inadequate for astrophysical opacity calculations. An application of the TOPAZ code will be to study the limits of statistical methods. Comparisons of TOPAZ to other opacity codes as well as experiments are presented.

  9. Fly ash system technology improves opacity

    SciTech Connect

    2007-06-15

    Unit 3 of the Dave Johnston Power Plant east of Glenrock, WY, USA had problems staying at or below the opacity limits set by the state. The unit makes use of a Lodge Cottrell precipitator. When the plant changed to burning Power River Basin coal, ash buildup became a significant issue as the fly ash control system was unable to properly evacuate hoppers on the unit. To overcome the problem, the PLC on the unit was replaced with a software optimization package called SmartAsh for the precipitator fly ash control system, at a cost of $500,000. After the upgrade, there have been no plugged hoppers and the opacity has been reduced from around 20% to 3-5%. 2 figs.

  10. Opacity project - Astrophysical and fusion applications

    NASA Technical Reports Server (NTRS)

    Pradhan, A. K.

    1987-01-01

    An overview is presented of a project to calculate large quantities of accurate atomic data for radiative processes of importance in the precise determination of opacities in stellar atmospheres, and for astrophysical and laboratory applications in general. Work is in progress on the oscillator strengths, photoionization cross sections, damping constants, etc., for all atoms and ions in hydrogen through neon isoelectronic sequences going up to iron.

  11. GPN Film Catalog 1972.

    ERIC Educational Resources Information Center

    Nebraska Univ., Lincoln. Great Plains National Instructional Television Library.

    The films described in this catalog were produced by schools or school-related organizations and were designed to meet the "relevant needs expressed by a broad spectrum of media personnel, students, and educators across the country." The catalog describes seventeen series and eight single films. For each of the series a description is presented…

  12. Enriching the Catalog

    ERIC Educational Resources Information Center

    Tennant, Roy

    2004-01-01

    After decades of costly and time-consuming effort, nearly all libraries have completed the retrospective conversion of their card catalogs to electronic form. However, bibliographic systems still are really not much more than card catalogs on wheels. Enriched content that Amazon.com takes for granted--such as digitized tables of contents, cover…

  13. MDS MIC Catalog Inputs

    NASA Technical Reports Server (NTRS)

    Johnson-Throop, Kathy A.; Vowell, C. W.; Smith, Byron; Darcy, Jeannette

    2006-01-01

    This viewgraph presentation reviews the inputs to the MDS Medical Information Communique (MIC) catalog. The purpose of the group is to provide input for updating the MDS MIC Catalog and to request that MMOP assign Action Item to other working groups and FSs to support the MITWG Process for developing MIC-DDs.

  14. The Eppelsheimer Subject Catalog

    ERIC Educational Resources Information Center

    Stevenson, Gordon

    1971-01-01

    Since 1945, a method of catalog classification, originally devised by H.W. Eppelsheimer for the Mainz City Library, has found wide acceptance. It is a complex of catalogs which combines features of both subject classification and alphabetical subject indexing. (25 references) (Author/NH)

  15. Catalog of Research Reports

    ERIC Educational Resources Information Center

    College Board, 2011

    2011-01-01

    This catalog lists research reports, research notes, and other publications available from the College Board's website. The catalog briefly describes research publications available free of charge. Introduced in 1981, the Research Report series includes studies and reviews in areas such as college admission, special populations, subgroup…

  16. Pacifica Programs 1972 Catalog.

    ERIC Educational Resources Information Center

    Pacifica Programs, 1972

    1972-01-01

    Audiotapes for alternative educational and cultural institutions have been selected from Pacifica's Tape Archives of over 10,000 programs for this third annual catalog. This 1972 catalog supercedes all previous Pacifica Tape Library publications, and includes many listings from previous years. The programs are listed under appropriate subject…

  17. HOMOGENEOUS CATALOGS OF EARTHQUAKES*

    PubMed Central

    Knopoff, Leon; Gardner, J. K.

    1969-01-01

    The usual bias in earthquake catalogs against shocks of small magnitudes can be removed by testing the randomness of the magnitudes of successive shocks. The southern California catalog, 1933-1967, is found to be unbiased in the sense of the test at magnitude 4 or above; the cutoff is improved to M = 3 for the subcatalog 1953-1967. PMID:16578700

  18. Extended Opacity Tables with Higher Temperature-Density-Frequency Resolution

    NASA Astrophysics Data System (ADS)

    Schillaci, Mark; Orban, Chris; Delahaye, Franck; Pinsonneault, Marc; Nahar, Sultana; Pradhan, Anil

    2015-05-01

    Theoretical models for plasma opacities underpin our understanding of radiation transport in many different astrophysical objects. These opacity models are also relevant to HEDP experiments such as ignition scale experiments on NIF. We present a significantly expanded set of opacity data from the widely utilized Opacity Project, and make these higher resolution data publicly available through OSU's portal with dropbox.com. This expanded data set is used to assess how accurate the interpolation of opacity data in temperature-density-frequency dimensions must be in order to adequately model the properties of most stellar types. These efforts are the beginning of a larger project to improve the theoretical opacity models in light of experimental results at the Sandia Z-pinch showing that the measured opacity of Iron disagrees strongly with all current models.

  19. Master data directories and Catalog Interoperability

    NASA Technical Reports Server (NTRS)

    Thieman, J. R.

    1990-01-01

    While the 'Catalog Interoperability' (CI) project began as a NASA effort to facilitate identification, location, and access to data of interest to space and earth sciences researchers, it now has a membership encompassing numerous U.S. and international agencies as well as academic institutions. CI is creating a global network of interconnected directory, catalog, and inventory systems. Its directories contain brief summary information about data sets, and can either furnish automated links to other information systems yielding greater detail on matters of interest or indicate to whom requests for additional information can go.

  20. IfA Catalogs of Solar Data Products

    NASA Astrophysics Data System (ADS)

    Habbal, Shadia R.; Scholl, I.; Morgan, H.

    2009-05-01

    This paper presents a new set of online catalogs of solar data products. The IfA Catalogs of Solar Data Products were developed to enhance the scientific output of coronal images acquired from ground and space, starting with the SoHO era. Image processing tools have played a significant role in the production of these catalogs [Morgan et al. 2006, 2008, Scholl and Habbal 2008]. Two catalogs are currently available at http://alshamess.ifa.hawaii.edu/ : 1) Catalog of daily coronal images: One coronal image per day from EIT, MLSO and LASCO/C2 and C3 have been processed using the Normalizing Radial-Graded-Filter (NRGF) image processing tool. These images are available individually or as composite images. 2) Catalog of LASCO data: The whole LASCO dataset has been re-processed using the same method. The user can search files by dates and instruments, and images can be retrieved as JPEG or FITS files. An option to make on-line GIF movies from selected images is also available. In addition, the LASCO data set can be searched from existing CME catalogs (CDAW and Cactus). By browsing one of the two CME catalogs, the user can refine the query and access LASCO data covering the time frame of a CME. The catalogs will be continually updated as more data become publicly available.

  1. Testing stellar opacities with laser facilities

    NASA Astrophysics Data System (ADS)

    Le Pennec, Maëlle; TURCK-CHIEZE, Sylvaine; RIBEYRE, Xavier; DUCRET, Jean-Eric; SALMON, Sébastien; BLANCARD, Christophe; COSSE, Philippe; MONDET, Guillaume; FAUSSURIER, Gérald; CONSORTIUM, OPAC

    2015-08-01

    Helio and asteroseismology (SoHo, KEPLER...) have produced observed acoustic oscillations of thousands of stars which characteristics are deeply linked to the transport of radiation inside the stars. However, the comparisons of seismic data with model predictions have led to significant discrepancies, which could be due to a bad knowledge of production and transport of energy.β-Cephei are pulsating stars, progenitor of supernovae and thus deeply linked to our understanding of stellar medium enrichment. Their study has shown some difficulty to predict the observed oscillation modes, which are directly linked to an opacity bump of the elements of the iron group (Cr, Fe, Ni) at log T=5.25 (κ-mechanism). We will show that several parameters of the stars (mass, age, metallicity) have a great influence on the amplitude of the bump, which impact their structure. We will then present the final results of an experiment conducted at LULI 2000 in 2011 on Cr, Fe and Ni compared to several opacity codes. We will show how to improve the opacity in the range of temperature around log T= 5.3.The Sun is a privilege place to test and validate physics. Since the recent update of the solar composition, there is a well established large discrepancy (Turck-Chièze et al. 2001) between solar models and seismic data, visible on the solar sound speed profile comparison.An explanation could be that the calculations of energy transport are not correctly taken into account.Unfortunately, there are very few experiments to validate these calculations (Bailey et al. 2014). That's why we are proposing an opacity experiment on a high-energy laser like LMJ, in the conditions of the radiative zone. We are exploiting in that purpose an approach called the Double Ablation Front to reach these high temperatures and densities at LTE and validate or not plasma effects and line widths. We will show the principle of this technique and the results of our simulations on several elements.In the mean time

  2. Galactic cold cores. V. Dust opacity

    NASA Astrophysics Data System (ADS)

    Juvela, M.; Ristorcelli, I.; Marshall, D. J.; Montillaud, J.; Pelkonen, V.-M.; Ysard, N.; McGehee, P.; Paladini, R.; Pagani, L.; Malinen, J.; Rivera-Ingraham, A.; Lefèvre, C.; Tóth, L. V.; Montier, L. A.; Bernard, J.-P.; Martin, P.

    2015-12-01

    Context. The project Galactic Cold Cores has carried out Herschel photometric observations of interstellar clouds where the Planck satellite survey has located cold and compact clumps. The sources represent different stages of cloud evolution from starless clumps to protostellar cores and are located in different Galactic environments. Aims: We examine this sample of 116 Herschel fields to estimate the submillimetre dust opacity and to search for variations that might be attributed to the evolutionary stage of the sources or to environmental factors, including the location within the Galaxy. Methods: The submillimetre dust opacity was derived from Herschel data, and near-infrared observations of the reddening of background stars are converted into near-infrared optical depth. We investigated the systematic errors affecting these parameters and used modelling to correct for the expected biases. The ratio of 250 μm and J band opacities is correlated with the Galactic location and the star formation activity. We searched for local variations in the ratio τ(250 μm)/τ(J) using the correlation plots and opacity ratio maps. Results: We find a median ratio of τ(250 μm) /τ(J) = (1.6 ± 0.2) × 10-3, which is more than three times the mean value reported for the diffuse medium. Assuming an opacity spectral index β = 1.8 instead of β = 2.0, the value would be lower by ~ 30%. No significant systematic variation is detected with Galactocentric distance or with Galactic height. Examination of the τ(250 μm) /τ(J) maps reveals six fields with clear indications of a local increase of submillimetre opacity of up to τ(250 μm) /τ(J) ~ 4 × 10-3 towards the densest clumps. These are all nearby fields with spatially resolved clumps of high column density. Conclusions: We interpret the increase in the far-infrared opacity as a sign of grain growth in the densest and coldest regions of interstellar clouds. Planck (http://www.esa.int/Planck) is a project of the European

  3. A Case for Conversational Cataloging.

    ERIC Educational Resources Information Center

    McAllister, Caryl; McAllister, A. Stratton

    1983-01-01

    Distinguishes between two basic types of interaction with online cataloging systems: preparation of bibliographic record offline by cataloger followed by online entry by clerk and interactive consultation by cataloger of online catalog while entering records. The Dobis/Libis system, authority files, code tables, command chaining, multidimensional…

  4. Resources Guide for Outsourcing Cataloging.

    ERIC Educational Resources Information Center

    Tan, Wendy

    Outsourcing cataloging is becoming popular in the library profession, but a directory of cataloging agencies is still lacking. Only a few cataloging agencies are well-publicized, and it is hoped that this directory of 23 agencies will promote a competitive open market, thereby serving as a form of quality assurance. Cataloging services are divided…

  5. Significance of irregular opacities in the radiology of coalworkers' pneumoconiosis

    PubMed Central

    Lyons, J. P.; Ryder, R. C.; Campbell, H.; Clarke, W. G.; Gough, J.

    1974-01-01

    Lyons, J. P., Ryder, R. C., Campbell, H., Clarke, W. G., and Gough, J. (1974).British Journal of Industrial Medicine,31, 36-44. Significance of irregular opacities in the radiology of coalworkers' pneumoconiosis. A correlation study of ventilatory, morbid anatomical, and radiological findings 95 deceased coal miners who suffered with simple pneumoconiosis during life was undertaken using the new ILO U/C International Classification of Radiographs of Pneumoconiosis, which now provides for the occurence of irregular opacities in addition to the classical rounded opacities. The study was carried out with a view to ascertaining the frequency of occurrence and the significance of irregular opacities in coalworkers' pneumoconiosis. Two ϰ-ray films with an average interval of 11 years between them were reported on in each case. The results showed that irregular opacities amounting to category 1 or more were present in 20% of the earlier films and in 48% of the later ones. Exceptionally they occured alone but were usually admixed with classical rounded opacities. Irregular opacities correlated positively with the extent of emphysema and the impairment of FEV1 whereas rounded opacities did not. Possible pathological causes for the irregular opacities are discussed and it is maintained that coalworkers' pneumoconiosis is the most probable one. Finally, it is suggested that the significance of these irregular changes may have been underrated in certain cases hitherto, with consequent underestimation of pneumoconiosis and its related effects. Morphological findings in a typical case showing radiologically mixed irregular and rounded opacities are demonstrated. Images PMID:4821410

  6. COSMIC: Software catalog 1991 edition diskette format

    NASA Technical Reports Server (NTRS)

    1991-01-01

    The PC edition of the annual COSMIC Software contains descriptions of the over 1,200 computer programs available for use within the United States as of January 1, 1991. By using the PC version of the catalog, it is possible to conduct extensive searches of the software inventory for programs that meet specific criteria. Elements such as program keywords, hardware specifications, source code languages, and title acronyms can be used for the basis of such searches. After isolating those programs that might be of best interest to the user, it is then possible to either view at the monitor, or generate a hardcopy listing of all information on those packages. In addition to the program elements that the user can search on, information such as total program size, distribution media, and program price, as well as extensive abstracts on the program, are also available to the user at this time. Another useful feature of the catalog allows for the retention of programs that meet certain search criteria between individual sessions of using the catalog. This allows users to save the information on those programs that are of interest to them in different areas of application. They can then recall a specific collection of programs for information retrieval or further search reduction if desired. In addition, this version of the catalog is adaptable to a network/shared resource environment, allowing multiple users access to a single copy of the catalog database simultaneously.

  7. Human-Computer Interfaces and OPACs: Introductory Thoughts Related to INNOPAC.

    ERIC Educational Resources Information Center

    Henry, Helen K.

    1991-01-01

    Human-computer interface design concepts are used as the criteria for evaluating the benefits and shortcomings of San Diego State University Library's online catalog, INNOPAC (the PAC). Features discussed include integrated files, search capabilities, system availability, user interface, record-to-record links, boolean operations, subject access,…

  8. Opacities in the massive stellar envelopes

    NASA Astrophysics Data System (ADS)

    Le Pennec, Maëlle; TURCK-CHIEZE, Sylvaine; SALMON, Sébastien; CONSORTIUM, OPAC

    2015-08-01

    Helio and asteroseismology (SoHo, CoRoT, KEPLER...) have produced observed acoustic oscillations of thousands of stars. The characteristics of these oscillations are deeply linked to the transport of radiation inside the stars. However, the comparisons of seismic data of Sun and stars with model predictions have led to significant discrepancies, which could be due to a bad knowledge of production and transport of energy.We will focus here on the case of β-Cephei.β-Cephei are pulsating stars, progenitor of supernovae and thus deeply linked to our understanding of stellar medium enrichment. Their study has shown some difficulty to predict the observed oscillation modes, which are directly linked to a bump of the opacity of the elements of the iron group (Cr, Fe, Ni) at log T=5.25 through their pulsating mechanism called the κ-mechanism. We will show that the different parameters of the stars (mass, age, metallicity) have a great influence on the amplitude of the bump, and then on the structure of the considered star.The mastery of the κ-mechanism that produces the pulsation of these stars supposes a fine determination of the peak opacity of the iron group in their envelope. We will present the final results of an experiment conducted at LULI 2000 in 2011 on Cr, Fe and Ni and compare them to OP and ATOMIC, SCO-RCG codes. We will show how to improve the opacity in the range of temperature around log T= 5.3.

  9. Users Look at Online Catalogs. Part 2: Interacting with Online Catalogs. Final Report.

    ERIC Educational Resources Information Center

    Larson, Ray R.

    This report focuses on a discussion of findings from analyses of computer transaction logs contributed by four of the online catalog systems used in the Public Access Project. It supplements the analyses of User and Non-User Questionnaires by providing analyses of data from the systems themselves. The four systems contributing data to this…

  10. IPOPv2 online service for the generation of opacity tables

    NASA Astrophysics Data System (ADS)

    Delahaye, Franck; Zwölf, Carlo Maria; Zeippen, Claude J.; Mendoza, Claudio

    2016-03-01

    In the framework of the present phase - IPOPv2 - of the international Opacity Project (OP), a new web service has been implemented based on the latest release of the OP opacities. The user may construct online opacity tables to be conveniently included in stellar evolution codes in the format most commonly adopted by stellar physicists, namely the OPAL format. This facility encourages the use and comparison of both the OPAL and OP data sets in applications. The present service allows for the calculation of multi-element mixtures containing the 17 species (H, He, C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca, Cr, Mn, Fe and Ni) considered by the OP, and underpins the latest release of OP opacities. This new service provides tables of Rosseland mean opacites using OP atomic data. We provide an alternative to the OPAL opacity services allowing direct comparison as well as study of the effect of uncertainties in stellar modeling due to mean opacities.

  11. 21st Century Cataloging.

    ERIC Educational Resources Information Center

    Tennant, Roy

    1998-01-01

    Discusses how collections in the digital library, instead of traditional cataloging, call for metadata, structured information about information. Describes three categories of metadata information about digital resources: descriptive, structural, and administrative. Examines emerging standards for digital-library classification. (AEF)

  12. Using small glass catalogs

    NASA Astrophysics Data System (ADS)

    Tesar, John C.

    2000-07-01

    Changes in glass catalogs from the major manufacturers, Schott, Ohara, Hoya, Corning, and Summita, are a future certainty. The ongoing efforts of these companies to eliminate arsenic, lead, and other environmentally unfriendly materials may well have an additional effect on the size of their catalogs also. We should not assume a zero-sum game, however. Environmental concerns may not lead to permanently smaller catalogs, though many have speculated that in the near term this might be so. However, from the designer's perspective, very small, abbreviated class catalogs, constructed for special purposes, can speed the glass selection process. Several examples will be discussed, based on derivative libraries suggested by Zhang, Shannon, and Walker. Streamlined libraries tailored for special purposes can be used effectively in the latest lens design software. Future software tools may speed this selection process by the use of algorithms that treat the problem as a `black box' using logic tools derived from probability studies of the patent literature.

  13. Non-Abelian energy loss at finite opacity.

    PubMed

    Gyulassy, M; Levai, P; Vitev, I

    2000-12-25

    A systematic expansion in opacity, L/lambda, is used to clarify the nonlinear behavior of induced gluon radiation in quark-gluon plasmas. The inclusive differential gluon distribution is calculated up to second order in opacity and compared to the zeroth order (factorization) limit. The opacity expansion makes it possible to take finite kinematic constraints into account that suppress jet quenching in nuclear collisions below RHIC (square root of s = 200 AGeV) energies. PMID:11136040

  14. Protostellar formation in rotating interstellar clouds. VII - Opacity and fragmentation

    NASA Technical Reports Server (NTRS)

    Boss, Alan P.

    1988-01-01

    This paper investigates the effect of variations in the Rosseland mean opacity of dust grains on numerical models of three-dimensional protostellar collapse and fragmentation. In particular, it is found that increasing the dust grain opacity by factors of three to four has little effect upon the gross characteristics of protostellar fragmentation. Consequently, theoretical quantities such as the estimated minimum protostellar mass for Population I star formation are insensitive to the precise value of the opacity.

  15. The RBV metadata catalog

    NASA Astrophysics Data System (ADS)

    André, François; Brissebrat, Guillaume; Fleury, Laurence; Gaillardet, Jérôme; Nord, Guillaume

    2014-05-01

    RBV (Réseau des Bassins Versants) is an initiative to consolidate the national efforts made by more than 15 elementary observatories belonging to various French research institutions (CNRS, Universities, INRA, IRSTEA, IRD) that study river and drainage basins. RBV is a part of a global initiative to create a network of observatories for investigating Earth's surface processes. The RBV Metadata Catalogue aims to give an unified vision of the work produced by every observatory to both the members of the RBV network and any external person involved in this domain of research. Another goal is to share this information with other catalogues through the compliance with the ISO19115 standard and the INSPIRE directive and the ability of being harvested (globally or partially). Metadata management is heterogeneous among observatories. The catalogue is designed to face this situation with the following main features: -Multiple input methods: Metadata records in the catalog can either be entered with the graphical user interface, harvested from an existing catalogue or imported from information system through simplified web services. -Three hierachical levels: Metadata records may describe either an observatory in general, one of its experimental site or a dataset produced by instruments. -Multilingualism: Metadata can be entered in several configurable languages. The catalogue provides many other feature such as search and browse mechanisms to find or discover records. The RBV metadata catalogue associates a CSW metadata server (Geosource) and a JEE application. The CSW server is in charge of the persistence of the metadata while the JEE application both wraps CSW calls and define the user interface. The latter is built with the GWT Framework to offer a rich client application with a fully ajaxified navigation. The catalogue is accessible at the following address: http://portailrbv.sedoo.fr/ Next steps will target the following points: -Description of sensors in accordance

  16. NASA Headquarters training catalog

    NASA Technical Reports Server (NTRS)

    1990-01-01

    The NASA Headquarters training catalog is a comprehensive listing of all educational and employee development programs. This course catalog contains descriptions of course content, objectives, target audience, prerequisites, length of course, approximate number of times the course is offered per year, and cost of the course. Curriculum areas include graduate and undergraduate academic study; professional development program; and executive management, senior management, and supervisory development programs. Secretarial/clerical and general computer skills programs are also included.

  17. HS3 Data Catalog

    NASA Technical Reports Server (NTRS)

    Emory, Amber Elizabeth; Chirica, Dan Cristian; Doyle, Jim

    2013-01-01

    This presentation covered the original plan for the Hurricane and Severe Storm Sentinel (HS3) Data Catalog available through the ESPO HS3 mission page (http://espo.nasa.gov/missions/hs3/) and provided examples of Model Products, Operational Products, and Research (Instrument) Products from the 2012 field campaign. The presentation also covered lessons learned and suggested improvements to the Data Catalog for the upcoming 2013 HS3 field campaign.

  18. A Modern Update and Usage of Historical Variable Star Catalogs

    NASA Astrophysics Data System (ADS)

    Pagnotta, Ashley; Graur, Or; Murray, Zachary; Kruk, Julia; Christie-Dervaux, Lucien; Chen, Dong Yi

    2015-01-01

    One of the earliest modern variable star catalogs was constructed by Henrietta Swan Leavitt during her tenure at the Harvard College Observatory (HCO) in the early 1900s. Originally published in 1908, Leavitt's catalog listed 1777 variables in the Magellanic Clouds (MCs). The construction and analysis of this catalog allowed her to subsequently discover the Cepheid period-luminosity relationship, now known as the Leavitt Law. The MC variable star catalogs were updated and expanded by Cecilia Payne-Gaposchkin in 1966 and 1971. Although newer studies of the MC variables have been performed since then, the new information has not always been correlated with the old due to a lack of modern descriptors of the stars listed in the Harvard MC catalogs. We will discuss the history of MC variable star catalogs, especially those compiled using the HCO plates, as well as our modernized version of the Leavitt and Payne-Gaposchkin catalogs. Our modern catalog can be used in conjunction with the archival plates (primarily via the Digital Access to a Sky Century @ Harvard scanning project) to study the secular behavior of the MC variable stars over the past century.

  19. Solar Opacity Calculations Using the Super-transition-array Method

    NASA Astrophysics Data System (ADS)

    Krief, M.; Feigel, A.; Gazit, D.

    2016-04-01

    A new opacity model has been developed based on the Super-Transition-Array (STA) method for the calculation of monochromatic opacities of plasmas in local thermodynamic equilibrium. The atomic code, named STAR (STA-Revised), is described and used to calculate spectral opacities for a solar model implementing the recent AGSS09 composition. Calculations are carried out throughout the solar radiative zone. The relative contributions of different chemical elements and atomic processes to the total Rosseland mean opacity are analyzed in detail. Monochromatic opacities and charge-state distributions are compared with the widely used Opacity Project (OP) code, for several elements near the radiation–convection interface. STAR Rosseland opacities for the solar mixture show a very good agreement with OP and the OPAL opacity code throughout the radiation zone. Finally, an explicit STA calculation was performed of the full AGSS09 photospheric mixture, including all heavy metals. It was shown that, due to their extremely low abundance, and despite being very good photon absorbers, the heavy elements do not affect the Rosseland opacity.

  20. UV Opacity at Gale Crater from MSL/REMS Measurements

    NASA Astrophysics Data System (ADS)

    Vicente-Retortillo, Á.; Martinez, G.; Renno, N. O.; Lemmon, M. T.; Mason, E. L.; de la Torre-Juárez, M.

    2015-12-01

    We use the UV photodiode output currents (TELRDR products) measured by the REMS Ultraviolet Sensor to calculate UV opacities at Gale crater during the first 804 sols of the MSL mission. We propose a novel technique to calculate the atmospheric opacity that is not sensitive to the degradation of the sensor due to the deposition of dust on it. We estimate the diffuse and total radiation signals by analyzing the events in which the direct solar beam was temporarily blocked by the masthead or by the mast of the rover. Then we use a radiative transfer model based on the Monte-Carlo method to obtain the UV opacity from those measurements. We compare the UV opacities with the opacities derived from Mastcam observations at 880 nm. Both opacities follow a similar seasonal trend, with the UV opacity showing values generally lower than those at 880 nm. The difference between both opacities varies over the year, with the minimum difference occurring when both opacities show their annual lowest values (Ls ~ 130º). The temporal variation of this difference may be attributed to changes in the dust size distribution.

  1. The HST Object Catalog

    NASA Astrophysics Data System (ADS)

    Lubow, Stephen H.; Budavari, T.

    2012-05-01

    We have created a catalog of objects observed by the WFPC2 and ACS instruments on the Hubble Space Telescope (HST). The catalog is based on observations taken on more than 6000 visits (telescope pointings) of ACS/WFC and more than 25000 visits of WFPC2. The catalog is obtained by cross-matching all Hubble Legacy Archive (HLA) Source Extractor source lists for these instruments. The source lists describe source detections within a visit. As a biproduct of the cross-matching, we obtain improved relative astrometry of the HST images. We apply a Bayesian method to help determine which source detections likely match. The catalog provides information about which source detections match together across visits. For each source detection, the catalog contains information that includes the corrected position, the name of the image, the filter, the exposure time, the exposure start and stop times, and the source magnitude. We also provide information on nondetections that can be used to determine dropouts. The catalog will be made publicly available.

  2. Progression of irregular opacities in asbestos miners.

    PubMed Central

    Sluis-Cremer, G K; Hnizdo, E

    1989-01-01

    All white and mixed race men who were employed in South African asbestos mines and mills between 30 November 1970 and 30 November 1975 were studied. The men who had two radiographs available, the first taken some time between the above two dates and the latest available radiograph which had to be at least two years after the first one numbered 1454: 793 continued exposure after the first radiograph and 661 did not. The films were read by a panel of three readers. Data available included age, years of exposure to asbestos and other mining, intensity of exposure to asbestos and other dust, and smoking habit. Progression was expressed as the difference between the average readings of radiograph 2--radiograph 1 in minor categories per year of irregular opacities. Changes in pleural abnormality were also measured. No differences of progression in the profusion or change in size of the irregular opacities were found between the two groups or in the number of zones affected. "New attacks" appeared equally frequently between the two groups. No difference in the change in extent of any type of pleural change was seen. It appears that once a dose of asbestos sufficient to initiate the disease has been retained it is inexorably progressive. PMID:2611157

  3. Research on Spectroscopy, Opacity, and Atmospheres

    NASA Technical Reports Server (NTRS)

    Oliversen, Ronald (Technical Monitor); Kurucz, Robert L.

    2004-01-01

    I propose to continue providing observers with basic data for interpreting spectra from stars, novas, supernovas, clusters, and galaxies. These data will include allowed forbidden line lists both laboratory and computed, for the first five to ten ions of all atoms and for all relevant diatomic molecules. I will eventually expend to all ions of the first thirty elements to treat far UV end X-ray spectra, and for envelope opacities. I also include triatomic molecules providing by other researchers. I have made CDs with Partridge and Schwanke's water data for work on M stars.The luna data also serve as input to my model atmosphere and synthesis programs that generated energy distributions, photometry, limb darkening, and spectra that can be used for planning observations and for fitting observed spectra. The spectrum synthesis programs produce detailed plots with the line identified. Grids of stellar spectra can be used for radial velocity-, rotation-, or abundance templates and for population synthesis. I am fitting spectra of bright stars to test the data and to produce atlases to guide observer. For each star the whole spectrum is computed from the UV to the far IR. The line data, opacities, models, spectra, and programs are freely distributed on CDs and on my web site and represent a unique resource for many NASA programs.

  4. Boo! Outsourcing from the Cataloging Perspective.

    ERIC Educational Resources Information Center

    Hill, Janet Swan

    1998-01-01

    Examines long-accepted ways library cataloging departments have used outsourcing (cataloging records, card production, authority control, card filling, and retrospective conversion) and potential outsourcing activities (original cataloging, and copy cataloging). Discusses reasons why outsourcing is controversial. (PEN)

  5. Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Lubow, S.; Budavári, T.

    2013-10-01

    We have created an initial catalog of objects observed by the WFPC2 and ACS instruments on the Hubble Space Telescope (HST). The catalog is based on observations taken on more than 6000 visits (telescope pointings) of ACS/WFC and more than 25000 visits of WFPC2. The catalog is obtained by cross matching by position in the sky all Hubble Legacy Archive (HLA) Source Extractor source lists for these instruments. The source lists describe properties of source detections within a visit. The calculations are performed on a SQL Server database system. First we collect overlapping images into groups, e.g., Eta Car, and determine nearby (approximately matching) pairs of sources from different images within each group. We then apply a novel algorithm for improving the cross matching of pairs of sources by adjusting the astrometry of the images. Next, we combine pairwise matches into maximal sets of possible multi-source matches. We apply a greedy Bayesian method to split the maximal matches into more reliable matches. We test the accuracy of the matches by comparing the fluxes of the matched sources. The result is a set of information that ties together multiple observations of the same object. A byproduct of the catalog is greatly improved relative astrometry for many of the HST images. We also provide information on nondetections that can be used to determine dropouts. With the catalog, for the first time, one can carry out time domain, multi-wavelength studies across a large set of HST data. The catalog is publicly available. Much more can be done to expand the catalog capabilities.

  6. Submillimeter fourier-transform spectrometer measurements of atmospheric opacity above mauna kea.

    PubMed

    Serabyn, E; Weisstein, E W; Lis, D C; Pardo, J R

    1998-04-20

    We present accurately calibrated submillimeter atmospheric transmission spectra obtained with a Fourier-transform spectrometer at the Caltech Submillimeter Observatory on Mauna Kea, Hawaii. These measurements cover the 0.9-0.3-mm wavelength range and are the first in a series aimed at defining the terrestrial long-wave atmospheric transmission curve. The 4.1-km altitude of the Mauna Kea site provides access to extremely low zenith water-vapor columns, permitting atmospheric observations at frequencies well above those possible from sea level. We describe the calibration procedures, present our first well-calibrated transmission spectra, and compare our results with those of a single-layer atmospheric transmission model, AT. With an empirical best-fit continuum opacity term included, this simple single-layer model provides a remarkably good fit to the opacity data for H(2)O line profiles described by either van Vleck-Weisskopf or kinetic shapes. PMID:18273141

  7. Interplay of Neutrino Opacities in Core-collapse Supernova Simulations

    NASA Astrophysics Data System (ADS)

    Lentz, Eric J.; Mezzacappa, Anthony; Messer, O. E. Bronson; Hix, W. Raphael; Bruenn, Stephen W.

    2012-11-01

    We have conducted a series of numerical experiments using spherically symmetric, general relativistic, neutrino radiation hydrodynamics with the code Agile-BOLTZTRAN to examine the effects of modern neutrino opacities on the development of supernova simulations. We test the effects of opacities by removing opacities or by undoing opacity improvements for individual opacities and groups of opacities. We find that improvements to electron capture (EC) on nuclei, namely EC on an ensemble of nuclei using modern nuclear structure models rather than the simpler independent-particle approximation (IPA) for EC on a mean nucleus, plays the most important role during core collapse of all tested neutrino opacities. Low-energy neutrinos emitted by modern nuclear EC preferentially escape during collapse without the energy downscattering on electrons required to enhance neutrino escape and deleptonization for the models with IPA nuclear EC. During shock breakout the primary influence on the emergent neutrinos arises from non-isoenergetic scattering (NIS) on electrons. For the accretion phase, NIS on free nucleons and pair emission by e + e - annihilation have the largest impact on the neutrino emission and shock evolution. Other opacities evaluated, including nucleon-nucleon bremsstrahlung and especially neutrino-positron scattering, have little measurable impact on neutrino emission or shock dynamics. Modern treatments of nuclear EC, e + e --annihilation pair emission, and NIS on electrons and free nucleons are critical elements of core-collapse simulations of all dimensionality.

  8. Using Transaction Log Analysis To Improve OPAC Retrieval Results.

    ERIC Educational Resources Information Center

    Blecic, Deborah D.; Bangalore, Nirmala S.; Dorsch, Josephine L.; Henderson, Cynthia L.; Koenig, Melissa H.; Weller, Ann C.

    1998-01-01

    An OPAC transaction log analysis at the University of Illinois at Chicago revealed that users had trouble with basic search techniques. After the introductory screens were simplified, a second analysis showed improved search results, indicating that monitoring OPACs can lead to improved information retrieval when changes are made in response to…

  9. INTERPLAY OF NEUTRINO OPACITIES IN CORE-COLLAPSE SUPERNOVA SIMULATIONS

    SciTech Connect

    Lentz, Eric J.; Mezzacappa, Anthony; Hix, W. Raphael; Messer, O. E. Bronson; Bruenn, Stephen W.

    2012-11-20

    We have conducted a series of numerical experiments using spherically symmetric, general relativistic, neutrino radiation hydrodynamics with the code Agile-BOLTZTRAN to examine the effects of modern neutrino opacities on the development of supernova simulations. We test the effects of opacities by removing opacities or by undoing opacity improvements for individual opacities and groups of opacities. We find that improvements to electron capture (EC) on nuclei, namely EC on an ensemble of nuclei using modern nuclear structure models rather than the simpler independent-particle approximation (IPA) for EC on a mean nucleus, plays the most important role during core collapse of all tested neutrino opacities. Low-energy neutrinos emitted by modern nuclear EC preferentially escape during collapse without the energy downscattering on electrons required to enhance neutrino escape and deleptonization for the models with IPA nuclear EC. During shock breakout the primary influence on the emergent neutrinos arises from non-isoenergetic scattering (NIS) on electrons. For the accretion phase, NIS on free nucleons and pair emission by e {sup +} e {sup -} annihilation have the largest impact on the neutrino emission and shock evolution. Other opacities evaluated, including nucleon-nucleon bremsstrahlung and especially neutrino-positron scattering, have little measurable impact on neutrino emission or shock dynamics. Modern treatments of nuclear EC, e {sup +} e {sup -}-annihilation pair emission, and NIS on electrons and free nucleons are critical elements of core-collapse simulations of all dimensionality.

  10. Competing Triggers: Transparency and Opacity in Vowel Harmony

    ERIC Educational Resources Information Center

    Kimper, Wendell A.

    2011-01-01

    This dissertation takes up the issue of transparency and opacity in vowel harmony--that is, when a segment is unable to undergo a harmony process, will it be skipped over by harmony (transparent) or will it prevent harmony from propagating further (opaque)? I argue that the choice between transparency and opacity is best understood as a…

  11. Calculation of Free-Free Opacities

    NASA Technical Reports Server (NTRS)

    Bhatia, A. K.; Maiden, D.; Ritchie, A. B., Jr.

    2003-01-01

    Free-free absorption is an important contribution to the opacity for radiation transport through hot materials Temperatures can be as high as several keV, such that it becomes a computational challenge to solve the Schrodinger equation efficiently for rapidly oscillating continuum functions for high angular momenta. Several groups\\footnots, including ours, have studied the phase amplitude solution (PAS) of the Schrodinger equation, in which one solves equations for the wave function amplitude and phase, which are: smooth functions of the electron energy. It is also important to have an accurate Schroudinger benchmark for the development of the PAS method. We present results for dipole matrix elements, Gaunt factors, and cross sections for the absorption of radiation at various energies for Cs XIX at temperature=100 eV and density=0.187 g/cc for our newly developed PAS and Schrodinger benchmark.

  12. Cigarette smoke, asbestos, and small irregular opacities

    SciTech Connect

    Weiss, W.

    1984-08-01

    The long-term inhalation of cigarette smoke is associated with the appearance of diffuse small irregular opacities of mild profusion on chest roentogenograms of some subjects in a limited number of reports. Human histologic and experimental animal studies have shown the presence of pulmonary interstitial fibrosis. The radiographic abnormalities may be explained by interstitial fibrosis, although bronchiolar wall thickening may also be involved. Because asbestos causes diffuse pulmonary fibrosis, the literature was reviewed for evidence concerning an interaction between cigarette smoke and asbestos in the frequency of pulmonary asbestosis. A majority of 14 prevalence studies and 7 cohort studies of asbestos workers with information on smoking habits have shown a positive interaction between the 2 agents. The interaction appears to be additive rather than synergistic. Smoking may exert an effect on the frequency of pulmonary asbestosis by increasing the effective fiber dose retained in the lungs through interference with clearance.

  13. Catalog of electronic data products

    NASA Astrophysics Data System (ADS)

    1990-07-01

    The catalog lists and describes the public-use data files produced by the National Center for Health Statistics (NCHS). More than 500 public-use data files, representing most of the NCHS data collection programs, are available for purchase and use. Public-use data files are prepared and disseminated to speed and enhance access to the full scope of data. NCHS data systems include a national vital registration program; household interview and health examination surveys; surveys of hospitals, nursing homes, physicians, and other health care providers; and other periodic or occasional data collection activities to produce a wide spectrum of health and health-related data. NCHS data users encompass all levels of government, the academic and research communities, and business. The majority of the data files released by NCHS contain microdata to allow researchers to aggregate findings in whatever format appropriate for their analyses.

  14. Opacity spectrometer design for opacity measurements at the National Ignition Facility

    NASA Astrophysics Data System (ADS)

    Ross, P. W.; Ahmed, M. F.; Bailey, J. E.; Dunham, G. S.; Emig, J. A.; Heeter, R. F.; Huffman, E. J.; Perry, T. S.; Opachich, Y. P.; Liedahl, D. A.; Schneider, M.; Stone, G. F.

    2015-08-01

    The National Ignition Facility (NIF) Opacity Spectrometer (OpSpec) is a modular spectrometer designed initially for opacity experiments on NIF. The design of the OpSpec is presented in light of the requirements and constraints. Potential dispersing elements and detector configurations are presented, and the advantages and disadvantages of each configuration are discussed. The full OpSpec design covers the energy range from approximately 550 eV to 2 keV. The energy resolution of the OpSpec is E/ΔE > 500. Applications of the OpSpec are discussed, including relevant astrophysical applications for NIF experiments, and will compliment recently published work on the Z machine. (Bailey, et al., Nature 517, 56-59 (2015).) This work was done by National Security Technologies, LLC, under Contract No. DE-AC52-06NA25946 with the U.S. Department of Energy.

  15. An opacity-sampled treatment of water vapor

    NASA Technical Reports Server (NTRS)

    Alexander, David R.; Augason, Gordon C.; Johnson, Hollis R.

    1989-01-01

    Although the bands of H2O are strong in the spectra of cool stars and calculations have repeatedly demonstrated their significance as opacity sources, only approximate opacities are currently available, due both to the difficulty of accounting for the millions of lines involved and to the inadequacy of laboratory and theoretical data. To overcome these obstacles, a new treatment is presented, based upon a statistical representation of the water vapor spectrum derived from available laboratory data. This statistical spectrum of water vapor employs an exponential distribution of line strengths and random positions of lines whose overall properties are forced to reproduce the mean opacities observed in the laboratory. The resultant data set is then treated by the opacity-sampling method exactly as are all other lines, both molecular and atomic. Significant differences are found between the results of this improved treatment and the results obtained with previous treatments of water-vapor opacity.

  16. A New Generation of Los Alamos Opacity Tables

    NASA Astrophysics Data System (ADS)

    Colgan, J.; Kilcrease, D. P.; Magee, N. H.; Sherrill, M. E.; Abdallah, J., Jr.; Hakel, P.; Fontes, C. J.; Guzik, J. A.; Mussack, K. A.

    2016-02-01

    We present a new, publicly available set of Los Alamos OPLIB opacity tables for the elements hydrogen through zinc. Our tables are computed using the Los Alamos ATOMIC opacity and plasma modeling code, and make use of atomic structure calculations that use fine-structure detail for all the elements considered. Our equation of state model, known as ChemEOS, is based on the minimization of free energy in a chemical picture and appears to be a reasonable and robust approach to determining atomic state populations over a wide range of temperatures and densities. In this paper we discuss in detail the calculations that we have performed for the 30 elements considered, and present some comparisons of our monochromatic opacities with measurements and other opacity codes. We also use our new opacity tables in solar modeling calculations and compare and contrast such modeling with previous work.

  17. Information Needs of Catalog Consumers.

    ERIC Educational Resources Information Center

    Seitz, Victoria

    1988-01-01

    A study assessed the information needs of catalog shoppers who buy clothing. A majority of the respondents regarded price, garment care, and fabric information vital to catalog purchases of clothing. (JOW)

  18. 40 CFR Figure 1 to Subpart Qqq of... - Data Summary Sheet for Determination of Average Opacity

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... of Average Opacity Clock time Number of converters blowing Converter aisle activity Average opacity... or no) Average opacity for 1-minute interval blowing without visible emission interferences(percent)...

  19. Cataloging Is a Prime Number.

    ERIC Educational Resources Information Center

    Zyroff, Ellen

    1996-01-01

    Examines the problems of viewing cataloging as an optional skill for librarians. Discusses factors that are eroding cataloging as a core competency, the elimination of cataloging positions amid shrinking budgets, the effect of this trend on library education and librarian role, mediocre service as an inevitable result, and the need to reestablish…

  20. Online Catalog Study: Final Report.

    ERIC Educational Resources Information Center

    Siegel, Elliot R.

    Following the closing of the National Library of Medicine's (NLM's) card catalog, a study was performed in 1982 to specify minimally acceptable requirements and capabilities for an NLM-based online catalog system and to evaluate the technical performance and user acceptance of available systems. Two prototype online catalog systems were selected…

  1. Catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Gezari, D. Y.; Schmitz, M.; Mead, J. M.

    1982-01-01

    The infrared astronomical data base and its principal data product, the catalog of Infrared Observations (CIO), comprise a machine readable library of infrared (1 microns to 1000 microns astronomical observations. To date, over 1300 journal articles and 10 major survey catalogs are included in this data base, which contains about 55,000 individual observations of about 10,000 different infrared sources. Of these, some 8,000 sources are identifiable with visible objects, and about 2,000 do not have known visible counterparts.

  2. Network-Accessible Resources and the Redefinition of Technical Services.

    ERIC Educational Resources Information Center

    Jones, Neil

    1998-01-01

    Discussion of the use of computer networks in academic libraries focuses on a technical-services perspective in the United Kingdom. Topics include access to electronic resources; standards; change management; the changing nature of the library catalog; redefining the local catalog; cataloging versus indexing; the Z39.50 information retrieval…

  3. HELIOSEISMIC TESTS OF THE NEW LOS ALAMOS OPACITIES

    SciTech Connect

    J. GUZIK; ET AL

    2001-01-01

    We compare the helioseismic properties of two solar models, one calibrated with the OPAL opacities and the other with the recent Los Alamos LEDCOP opacities. We show that, in the radiative interior of the Sun, the small differences between the two sets of opacities (up to 6% near the base of the convection zone) lead to noticeable differences in the solar structure (up to 0.4% in sound speed), with the OPAL model being the closest to the helioseismic data. More than half of the difference between the two opacity sets results from the interpolation scheme and from the relatively widely spaced temperature grids used in the tables. The remaining 3% intrinsic difference between the OPAL and the LEDCOP opacities in the radiative interior of the Sun is well within the error bars on the opacity calculations resulting from the uncertainties on the physics. We conclude that the OPAL and LEDCOP opacity sets do about as well in the radiative interior of the Sun.

  4. Slide Classification and Cataloging.

    ERIC Educational Resources Information Center

    Clawson, Catherine R.; Ronkowski, Charles A.

    1981-01-01

    Follows up an August 1978 article on the cataloging of slides using color photocopying, and presents unsolicited reactions to that article from librarians who were interested in the slide system developed for use in the C-E Refractories Research and Development Library. Twelve references are listed. (FM)

  5. Outsourcing Cataloging: An Evaluation.

    ERIC Educational Resources Information Center

    Smith, Vicki Toy

    1997-01-01

    Outsourcing library cataloging offers advantages and disadvantages. This article discusses case studies of outsourcing projects at Michigan State University, SUNY Binghamton, Loyola University, Truckee Meadows Community College, and Wright State University. Highlights the retrospective conversion and reclassification of the Mines/Engineering…

  6. Greenbook Abstract & Catalog--4.

    ERIC Educational Resources Information Center

    Coole, Walter A.; And Others

    This catalog is the fourth in a series extending and updating teaching materials previously disseminated through the ERIC system, including the "Greenbook System" of training materials for higher education professionals (ED 103 083-084 and 148 438), Open Classroom Documentation, a procedural manual for an autoinstructional learning laboratory at…

  7. INSTRUCTIONAL MATERIALS CATALOG.

    ERIC Educational Resources Information Center

    Ohio Vocational Agriculture Instructional Materials Service, Columbus.

    THE TITLE, IDENTIFICATION NUMBER, DATE OF PUBLICATION, PAGINATION, A BRIEF DESCRIPTION, AND PRICE ARE GIVEN FOR EACH OF THE INSTRUCTIONAL MATERIALS AND AUDIOVISUAL AIDS INCLUDED IN THIS CATALOG. TOPICS COVERED ARE FIELD CORPS, HORTICULTURE, ANIMAL SCIENCE, SOILS, AGRICULTURAL ENGINEERING, AND FARMING PROGRAMS. AN ORDER FORM IS INCLUDED. (JM)

  8. Environmental Education Resource Catalog.

    ERIC Educational Resources Information Center

    Phoenix Union High School District, AZ.

    Prepared for the use of elementary and secondary school teachers, this catalog is designed to provide information about environmental education materials which will aid in classroom presentations and in curriculum development. Subject areas cover conservation and natural resources, ecology and ecosystems, environmental action and survival,…

  9. FAA Film Catalog.

    ERIC Educational Resources Information Center

    Federal Aviation Administration (DOT), Washington, DC.

    Some 75 films from the U.S. Department of Transportation's Federal Aviation Administration are listed in this catalog. Topics dealt with include aerodynamics, airports, aviation history and careers, flying clubs, navigation and weather. Most of the films are 16mm sound and color productions. Filmstrips requiring a 35mm projector and phonograph or…

  10. Cataloging Pirated Chinese Books

    ERIC Educational Resources Information Center

    Wang, Sze-Tseng

    1971-01-01

    Various types of pirated Chinese books are given with specific examples. The basic steps followed for the proper identification of these books is described, and remedies suggested in case the original is discovered after the book has been cataloged according to the information given by the book pirate. (13 references) (Author/NH)

  11. AUDIOVISUAL SERVICES CATALOG.

    ERIC Educational Resources Information Center

    Stockton Unified School District, CA.

    A CATALOG HAS BEEN PREPARED TO HELP TEACHERS SELECT AUDIOVISUAL MATERIALS WHICH MIGHT BE HELPFUL IN ELEMENTARY CLASSROOMS. INCLUDED ARE FILMSTRIPS, SLIDES, RECORDS, STUDY PRINTS, FILMS, TAPE RECORDINGS, AND SCIENCE EQUIPMENT. TEACHERS ARE REMINDED THAT THEY ARE NOT LIMITED TO USE OF THE SUGGESTED MATERIALS. APPROPRIATE GRADE LEVELS HAVE BEEN…

  12. Patron Online Catalog Success.

    ERIC Educational Resources Information Center

    Thorne, Rosemary; Whitlatch, Jo Bell

    1994-01-01

    Reports on studies conducted to provide an in-depth picture of online catalog use in three aspects of library research: (1) as part of the reference process; (2) as used by unassisted users; (3) as a step in obtaining documents. The research methodology is offered as a model for surveying other library services or products. (14 references) (KRN)

  13. Measuring Law Library Catalog Web Site Usability: A Web Analytic Approach

    ERIC Educational Resources Information Center

    Fang, Wei; Crawford, Marjorie E.

    2008-01-01

    Although there is a proliferation of information available on the Web, and law professors, students, and other users have a variety of channels to locate information and complete their research activities, the law library catalog still remains an important source for offering users access to information that has been evaluated and cataloged by…

  14. Making the Transition to the SuperCatalog: ISU's Experience with LUIS II.

    ERIC Educational Resources Information Center

    Davis, H. Scott; Ensor, Patricia L.

    1991-01-01

    Describes the development at Indiana State University of a SuperCatalog, a computerized library catalog that provides access to both library holdings and locally loaded commercial databases, including ERIC and Wilson indexes. Software is discussed; the impact on staff, users, interlibrary loan, and library instruction is examined; and future…

  15. Books-By-Mail Using a Mail Order Book Catalog. A Project Report.

    ERIC Educational Resources Information Center

    Warshasky, Stanford

    The Silas Bronson Library in Waterbury, Connecticut received a state grant in 1976 to provide increased accessibility to their services through a books-by-mail program. In 1975, 9,750 catalogs listing the books-by-mail collection were mailed to local households. Newspaper publicity requested that households that received the catalogs share them…

  16. Cataloging Three-Dimensional Objects: A Study of Academic Health Science Libraries.

    ERIC Educational Resources Information Center

    Compton, Jennifer L.

    This study examines a random sample of academic health sciences libraries across the United States to determine if these institutions have three-dimensional medical artifacts in their collections and how they organize and catalog these materials to provide access to them. A questionnaire was sent to heads of cataloging at 30 academic health…

  17. Monochromatic, Rosseland mean, and Planck mean opacity routine

    NASA Astrophysics Data System (ADS)

    Semenov, D.

    2006-11-01

    Several FORTRAN77 codes were developed to compute frequency-dependent, Rosseland and Planck mean opacities of gas and dust in protoplanetary disks. The opacities can be computed for an ensemble of dust grains having various compositions (ices, silicates, organics, etc), sizes, topologies (homogeneous/composite aggregates, homogeneous/layered/composite spheres, etc.), porosities, and dust-to-gas ratio. Several examples are available. In addition, a very fast opacity routine to be used in modeling of the radiative transfer in hydro simulations of disks is available upon request (10^8 routine calls require about 30s on Pentium 4 3.0GHz).

  18. NLTE opacities of mid- and high-Z cocktails

    SciTech Connect

    Sherrill, Manolo E; Abdallah, Joseph; Fontes, Christopher J; Kilcrease, David P; Zhang, Honglin

    2009-01-01

    In this work we report on the development of a new method for computing mi- and high-Z NLTE opacities. A study has been performed using this method to assess the EOS and opacity sensitivities to the radiation field for both single species Au and multi-species SnNb and U{sub 3}Au plasma cocktails with an emphasis on moderately to highly ionized systems. Developed as a benchmark tool, this capability will be used to assess both current and future in-line NLTE opacity capabilities.

  19. Interaction of configuration in spectral opacity calculations for stellar physics

    NASA Astrophysics Data System (ADS)

    Gilles, D.; Turck-Chièze, S.; Busquet, M.; Thais, F.; Loisel, G.; Piau, L.; Ducret, J. E.; Blenski, T.; Poirier, M.; Blancard, C.; Cossé, P.; Faussurier, G.; Gilleron, F.; Pain, J. C.; Guzik, J. A.; Kilcrease, D. P.; Magee, N. H.; Harris, J.; Bastiani-Ceccotti, S.; Delahaye, F.; Zeippen, C. J.

    2012-02-01

    We discuss the role of Configuration Interaction (CI) and the influence of the number of configurations taken into account in the calculations of nickel and iron spectral opacities provided by the OPAC international collaboration, including statistical approaches (SCO, CASSANDRA, STA), detailed accounting (OPAS, LEDCOP, OP, HULLAC-v9) or hybrid method (SCO-RCG). Opacity calculations are presented for a temperature T of 27.3 eV and a density of 3.4 mg/cm3, conditions relevant for pulsating stellar envelopes.

  20. NLTE Opacities of Mid- and High-Z Cocktails

    SciTech Connect

    Sherrill, Manolo; Abdallah, Joseph; Honglin, Zhang; Fontes, Christopher J; Kilcrease, David P

    2009-01-01

    In this work we report on the development of a new method for computing mid-and high-Z NLTE opacities. A study has been performed using this method to assess the EOS and opacity sensitivities to the radiation field for both single species Au and multi-species SnNb and U{sub 3}Au plasma cocktails with an emphasis on moderately to highly ionized systems. Developed as a benchmark tool to assess both current and future in line NLTE opacity capabilities, we have applied this new approach to assess XSN spectral fidelity for Au at commonly expected NIF hohlraum conditions.

  1. Comparative pulsation calculations with OP and OPAL opacities

    NASA Technical Reports Server (NTRS)

    Kanbur, Shashi M.; Simon, Norman R.

    1994-01-01

    Comparative linear nonadiabatic pulsation calculations are presented using the OPAL and Opacity Project opacities. The two sets of opacities include effects due to intermediate coupling and fine structure as well as new abundances. We used two mass luminosity (M-L) relations, one standard (BIT), and one employing substantial convective core overshoot (COV). The two sets of opacities cannot be differentiated on the basis of the stellar pulsation calculations presented here. The BIT relation can model the beat and bump Cepheids with masses between 4 and 7 solar mass, while if the overshoot relation is used, masses between 2 and 6 solar mass are required. In the RR Lyrae regime, we find the inferred masses of globular cluster RRd stars to be little influenced by the choice of OPAL or OP. Finally, the limited modeling we have done is not able to constrain the Cepheid M-L relation based upon period ratios observed in the beat and bump stars.

  2. TECHNICAL ASSISTANCE DOCUMENT, PERFORMANCE AUDIT PROCEDURES FOR OPACITY MONITORS

    EPA Science Inventory

    This manual contains monitor-specific performance audIt procedures and data forms for use in conducting audits of installed continuous opacity monitoring systems (COMSs). eneral auditing procedure and acceptance criteria for various audit criteria are delineated. Practical consid...

  3. Decal Process Document and Catalog

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The Decal Process Document and Catalog, JSC 27260 is the standard flight decal catalog, complete with illustrations and part numbers. As hardware developers identify labels that have common applicability across end items, these labels can be evaluated for "standard decal classification" and entered into the decal catalog for general use. The hardware developer must have a label design that meets current, applicable labeling requirements, and submit to the Decal Design and Production Facility (DDPF) as a standard label candidate. Upon approval, the label will be added to the decal catalog. The Decal Process Document and Catalog provides a selection of decals from which the NASA and NASA contractor customers can easily order. The decals shown in the catalog have been previously produced and have released engineering/fabrication drawings on file in the (DDPF). A released drawing is required before a decal can be produced or placed into the catalog. Some decals included in the catalog have a common applicability and are used in various NASA vehicles/habitats. It is the intent of the DDPF to maintain this catalog as a "living document" to which decals/placards can be added as they are repeatedly used. The advantage of identifYing flight decals in this catalog is that a released drawing is already in place, and the products will be flight certified.

  4. Mean gas opacity for circumstellar environments and equilibrium temperature degeneracy

    NASA Astrophysics Data System (ADS)

    Malygin, M. G.; Kuiper, R.; Klahr, H.; Dullemond, C. P.; Henning, Th.

    2014-08-01

    Context. In a molecular cloud dust opacity typically dominates over gas opacity, yet in the vicinities of forming stars dust is depleted, and gas is the sole provider of opacity. In the optically thin circumstellar environments the radiation temperature cannot be assumed to be equal to the gas temperature, hence the two-temperature Planck means are necessary to calculate the radiative equilibrium. Aims: By using the two-temperature mean opacity one does obtain the proper equilibrium gas temperature in a circumstellar environment, which is in a chemical equilibrium. A careful consideration of a radiative transfer problem reveals that the equilibrium temperature solution can be degenerate in an optically thin gaseous environment. Methods: We compute mean gas opacities based on the publicly available code DFSYNTHE by Kurucz and Castelli. We performed the calculations assuming local thermodynamic equilibrium and an ideal gas equation of state. The values were derived by direct integration of the high-resolution opacity spectrum. Results: We produced two sets of gas opacity tables: Rosseland means and two-temperature Planck means. For three metallicities [Me/H] = 0.0, ± 0.3 we covered the parameter range 3.48 ≤ log Trad [K] ≤ 4.48 in radiation temperature, 2.8 ≤ log Tgas [K] ≤ 6.0 in gas temperature, and -10 ≤ log P [dyn cm-2] ≤ 6 in gas pressure. We show that in the optically thin circumstellar environment for a given stellar radiation field and local gas density there are several equilibrium gas temperatures possible. Conclusions: We conclude that, in general, equilibrium gas temperature cannot be determined without treating the temperature evolution. The opacity tables are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/568/A91 as well as via http://www.mpia.de/~malygin

  5. Life cycle cost evaluation of the digital opacity compliance system.

    PubMed

    McFarland, Michael J; Palmer, Glenn R; Olivas, Arthur C

    2010-01-01

    The US Environmental Protection Agency (EPA) has established EPA Reference Method 9 (Method 9) as the preferred enforcement approach for verifying compliance with federal visible opacity standards. While Method 9 has an extensive history of successful employment, reliance on human observers to quantify visible emissions is inherently subjective, a characteristic that exposes Method 9 results to claims of inaccuracy, bias and, in some cases, outright fraud. The Digital Opacity Compliance System (DOCS), which employs commercial-off-the-shelf digital photography coupled with simple computer processing, is a new approach for quantifying visible opacity. The DOCS technology has been previously demonstrated to meet and, in many cases, surpass the Method 9 accuracy and reliability standards (McFarland et al., 2006). Beyond its performance relative to Method 9, DOCS provides a permanent visual record of opacity, a vital feature in legal compliance challenges. In recent DOCS field testing, the opacity analysis of two hundred and forty one (241) regulated air emissions from the following industrial processes: 1) industrial scrubbers, 2) emergency generators, 3) asphalt paving, 4) steel production and 5) incineration indicated that Method 9 and DOCS were statistically equivalent at the 99% confidence level. However, a life cycle cost analysis demonstrated that implementation of DOCS could potentially save a facility $15,732 per trained opacity observer compared to utilization of Method 9. PMID:20022420

  6. Correlation of plume opacity with particles and sulfates from boilers

    SciTech Connect

    Lou, J.C.; Lee, M.; Chen, K.S.

    1997-07-01

    The effects of emission concentrations of particulate matters and sulfates on plume opacity are investigated by in situ measurements. The studies are conducted for three processes of two coal-fired plants and one oil-fired that are all equipped with electrostatic precipitators. Flue-gas sampling and analysis include the concentrations of particles and total water soluble sulfates, particle size distribution, and flue-gas composition; while in-stack and out-of-stack opacities are determined by a transmissometer and certified smoke inspectors, respectively. Experimental results show that plume opacity outside the stack linearly correlates well with the in-stack opacity. The mixing of hot flue gas with cold ambient air would result in the condensation of hygroscopic sulfuric acid aerosols and an increase about 1.6% out of typical 15--25% measured opacity. An empirical equation similar to the Beer-Lambert-Bouger form is derived for predicting the plume opacity in terms of the stack diameter and the concentrations of particles and total water soluble sulfates. Good comparisons are achieved between predictions by the empirical equation and other available field data.

  7. Geothermal innovative technologies catalog

    SciTech Connect

    Kenkeremath, D.

    1988-09-01

    The technology items in this report were selected on the basis of technological readiness and applicability to current technology transfer thrusts. The items include technologies that are considered to be within 2 to 3 years of being transferred. While the catalog does not profess to be entirely complete, it does represent an initial attempt at archiving innovative geothermal technologies with ample room for additions as they occur. The catalog itself is divided into five major functional areas: Exploration; Drilling, Well Completion, and Reservoir Production; Materials and Brine Chemistry; Direct Use; and Economics. Within these major divisions are sub-categories identifying specific types of technological advances: Hardware; Software; Data Base; Process/Procedure; Test Facility; and Handbook.

  8. Education programs catalog

    SciTech Connect

    Not Available

    1994-05-01

    Since its formation in 1977, US DOE has been authorized to support education programs that help ensure an adequate supply of scientists, engineers, and technicians for energy-related research, production activities, and technology transfer. A national conference in 1989 produced a clear vision of the important role that DOE, its facilities, and its 169,000 Federal and contract employees can play in the educational life of their communities and the Nation. Many of the programs listed in this catalog are the result of this new vision; others have existed for many years. Purpose of this catalog is to make all DOE education efforts more widely known so that more teachers, students, and others can benefit. Supporting the hundreds of education programs (precollege, undergraduate, graduate, public) is the network of DOE national laboratories, technology centers, and other research facilities. Brief descriptions of each facility, its programs, and contact information for its education personnel are included.

  9. Research on Spectroscopy, Opacity, and Atmospheres

    NASA Technical Reports Server (NTRS)

    Kurucz, Robert L.

    2005-01-01

    I propose to continue providing observers with basic data for interpreting spectra from stars, novas, supernovas, clusters, and galaxies. These data will include allowed and forbidden line lists, both laboratory and computed, for the first five to ten ions of all atoms and for all relevant diatomic molecules. I will eventually expand to all ions of the first thirty elements to treat far UV and X-ray spectra, and for envelope opacities. I also include triatomic molecules provided by other researchers. I have also made CDs with Partridge and Schwenke's water data for work on UV stars. The line data also serve as input to my model atmosphere and synthesis programs that generate energy distributions, photometry, limb darkening, and spectra that can be used for planning observations and for fitting observed spectra. The spectrum synthesis programs produce detailed plots with the lines identified. Grids of stellar spectra can be used for radial velocity-, rotation-, or abundance templates and for population synthesis. I am fitting spectra of bright stars to test the data and to produce atlases to guide observers. For each star the whole spectrum is computed from the UV to the far IR. The line data, opacities, models, spectra, and programs are freely distributed on CDs and on my Web site and represent a unique resource for many NASA programs. I am now in full production of new line lists for atoms. I am computing all ions of all elements from H to Zn and the first 5 ions of all the heavier elements, about 800 ions. For each ion I treat as many as 61 even and 61 odd configurations, computing all energy levels and eigenvectors. The Hamiltonian is determined from a scaled-Hartree-Fock starting guess by least squares fitting the observed energy levels. The average energy of each configuration is used in computing scaled-Thomas-Fermi-Dirac wavefunctions for each configuration which in turn are used to compute allowed and forbidden transition integrals. These are multiplied

  10. Distributed Computerized Catalog System

    NASA Technical Reports Server (NTRS)

    Borgen, Richard L.; Wagner, David A.

    1995-01-01

    DarkStar Distributed Catalog System describes arbitrary data objects in unified manner, providing end users with versatile, yet simple search mechanism for locating and identifying objects. Provides built-in generic and dynamic graphical user interfaces. Design of system avoids some of problems of standard DBMS, and system provides more flexibility than do conventional relational data bases, or object-oriented data bases. Data-collection lattice partly hierarchical representation of relationships among collections, subcollections, and data objects.

  11. Landsat US standard catalog

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The U.S. Standard Catalog lists imagery of the continental U.S., Alaska and Hawaii acquired by Landsat 1 and 2 which has been processed and input to the data files during the referenced month. Data, such as date acquired, cloud cover and image quality are given for each scene. The microfilm roll and frame on which the scene may be found is also given.

  12. Introduction: ISC-GEM catalog

    NASA Astrophysics Data System (ADS)

    Helffrich, George

    2015-02-01

    This Special Issue of Physics of the Earth and Planetary Interiors documents the intent, logistical efforts and methods used in producing the ISC-GEM Global Instrumental Earthquake Catalog (1900-2009). It represents a significant achievement in both the manpower and the methods used to yield a homogeneous catalog from the earliest days of global seismic instrumentation. The catalog should present researchers with a resource to assess seismicity rates, locations and mechanisms uniformly in the instrumental era.

  13. HyperCard--The Poor Librarian's Online Card Catalog.

    ERIC Educational Resources Information Center

    Renjilian, Jerry

    1993-01-01

    Describes the use of HyperCard software as an economical alternative to an online catalog to provide access to works of literary criticism at New Canaan High School (Connecticut). Topics discussed include the search screen display; the use of a scanner to input actual book indexes; and a dictionary of authors. (LRW)

  14. User Instructions for Online Catalogs in ARL Libraries. Kit 93.

    ERIC Educational Resources Information Center

    Association of Research Libraries, Washington, DC. Office of Management Studies.

    This collection of library documents which provide instructions for users of online public access catalogs in member libraries of the Association of Research Libraries (ARL) contains: (1) a set of enhanced instructions for library users of Geac, a commercial online circulation system at the University of Arizona; (2) sets of materials of…

  15. Circulation System to Online Catalog: The Transition at OSU.

    ERIC Educational Resources Information Center

    Van Pulis, Noelle

    This paper describes the development of an online public access catalog from a limited-purpose online circulation system at Ohio State University (OSU) and the negative and positive aspects of this transition. It is noted that the online system, known as the Library Control System (LCS), was designed to be fully operational in July 1982. Steps in…

  16. Reinventing the Community College Catalog Using Hypertext for IBM.

    ERIC Educational Resources Information Center

    Rock, Charles B.

    In an attempt to provide a more useful and economical alternative to the traditional college catalog, St Louis Community College at Florissant Valley (SCC), in Missouri, has developed a hyptertext program. The hypertext format links pools of information that can be accessed at the rate and depth of detail that the end user desires. The hypertext…

  17. CITE NLM: Natural-Language Searching in an Online Catalog.

    ERIC Educational Resources Information Center

    Doszkocs, Tamas E.

    1983-01-01

    The National Library of Medicine's Current Information Transfer in English public access online catalog offers unique subject search capabilities--natural-language query input, automatic medical subject headings display, closest match search strategy, ranked document output, dynamic end user feedback for search refinement. References, description…

  18. NOAA's Data Catalog and the Federal Open Data Policy

    NASA Astrophysics Data System (ADS)

    Wengren, M. J.; de la Beaujardiere, J.

    2014-12-01

    The 2013 Open Data Policy Presidential Directive requires Federal agencies to create and maintain a 'public data listing' that includes all agency data that is currently or will be made publicly-available in the future. The directive requires the use of machine-readable and open formats that make use of 'common core' and extensible metadata formats according to the best practices published in an online repository called 'Project Open Data', to use open licenses where possible, and to adhere to existing metadata and other technology standards to promote interoperability. In order to meet the requirements of the Open Data Policy, the National Oceanic and Atmospheric Administration (NOAA) has implemented an online data catalog that combines metadata from all subsidiary NOAA metadata catalogs into a single master inventory. The NOAA Data Catalog is available to the public for search and discovery, providing access to the NOAA master data inventory through multiple means, including web-based text search, OGC CS-W endpoint, as well as a native Application Programming Interface (API) for programmatic query. It generates on a daily basis the Project Open Data JavaScript Object Notation (JSON) file required for compliance with the Presidential directive. The Data Catalog is based on the open source Comprehensive Knowledge Archive Network (CKAN) software and runs on the Amazon Federal GeoCloud. This presentation will cover topics including mappings of existing metadata in standard formats (FGDC-CSDGM and ISO 19115 XML ) to the Project Open Data JSON metadata schema, representation of metadata elements within the catalog, and compatible metadata sources used to feed the catalog to include Web Accessible Folder (WAF), Catalog Services for the Web (CS-W), and Esri ArcGIS.com. It will also discuss related open source technologies that can be used together to build a spatial data infrastructure compliant with the Open Data Policy.

  19. Version 1 of the Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Whitmore, Bradley

    2015-08-01

    The Hubble Source Catalog (HSC) is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based Hubble Legacy Archive (HLA - available at http://hla.stsci.edu) source lists into a single master catalog. The HSC includes ACS/WFC, WFPC2, and WFC3 source lists generated using the Source Extractor software (Bertin & Arnouts 1996). The current version of the catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations and about 50 thousand HST exposures cross-matched using the technique described in Budavari & Lubow (2012). The astrometric residuals for HSC objects are typically within 10 mas and the magnitude residuals between repeat measurements are generally within 0.10 mag. Version 1 of the HSC was released on February 25, 2015. The primary ways to access the HSC are the MAST Discovery Portal (http://mast.stsci.edu), and a CasJobs capability for advanced searches. Detailed use cases and videos are available to help researchers get started. The HSC will be an important reference for future telescopes, such as the James Webb Space Telescope and survey programs such as Pan-STARRS and LSST. The URL for the HSC is http://archive.stsci.edu/hst/hsc/ .

  20. Integration of hydrologic parameter ontology in CUAHSI HydroCatalog

    NASA Astrophysics Data System (ADS)

    Zaslavsky, I.; Valentine, D. W.; Whitenack, T.; Piasecki, M.; Hooper, R. P.; Choi, Y.; Maidment, D. R.

    2010-12-01

    Nomenclatures of hydrologic parameters are large and very fragmented. One of the key goals of the CUAHSI Hydrologic Information System project (his.cuahsi.org) is to unify semantically diverse hydrologic observations and organize them so the data can be easily discovered, accessed and analyzed in different types of research scenarios, by different types of users. The core of the system is a hydrologic metadata catalog, which describes observational data available from multiple repositories via a standard set of CUAHSI water data web services. To address needs of different types of users, the HydroCatalog is being designed as a multi-level information system. At the lower level, a CUAHSI HIS time series catalog contains metadata about nearly 23 million time series from government and academic data sources (hiscentral.cuahsi.org). The time series representation organized by primary data sources is suitable for hydrologists and data managers who need to discover and access hydrologic observations in a format they were published, without additional interpretations or data conversions. However, such a representation doesn’t fully address data discovery and access needs of hydrologic analysts and modelers who prefer to work with curated and interpreted hydrologic data collections organized by thematic categories. Therefore, an additional layer of commonly requested hydrologic data products (“hydrologic themes”) is being constructed, where a theme represents a derived spatio-temporal aggregation of observational data. Information supporting semantics-based discovery is needed at both levels of the HydroCatalog. At the time series catalog level, the focus is on discovery of observations based on a community-curated hierarchy of hydrologic concepts, on associating variables with these concepts, and on translating concepts-based queries into queries specific to individual sources of primary data. At the theme catalog level, the variable-concept associations are used to

  1. Interplay of Neutrino Opacities in Core-collapse Supernova Simulations

    SciTech Connect

    Lentz, Eric J; Mezzacappa, Anthony; Messer, Bronson; Hix, William Raphael; Bruenn, S. W.

    2012-01-01

    We have conducted a series of numerical experiments using spherically symmetric, general relativistic, neutrino radiation hydrodynamics with the code Agile-BOLTZTRAN to examine the effects of including, and improving, the calculation of neutrino opacities on the development of supernova simulations by removing, or replacing, each opacity individually, or removing opacities in groups. We find that during core collapse improvements to electron capture (EC) on nuclei, namely EC on an ensemble of nuclei based on the hybrid model, relative to the simpler independent-particle approximation (IPA) for a mean nucleus, plays the most important role of all tested neutrino opacities. Low-energy neutrinos emitted by nuclear EC preferentially escape during collapse leading to larger deleptonization of the collapsing core, without the energy downscattering via non-isoenergetic scattering (NIS) on electrons required for the models with IPA nuclear EC. During shock breakout the primary influence on the emergent neutrinos arises from NIS on electrons. For the accretion phase NIS on free nucleons and pair emission by $e^+e^-$-annihilation have the largest impact on the neutrino emission and shock evolution. Other opacities evaluated including nucleon-nucleon bremsstrahlung and especially neutrino-positron scattering have little measurable impact on neutrino emission or shock dynamics. Modern treatments of nuclear electron capture, $e^+e^-$-annihilation pair emission, and non-isoenergetic scattering on electrons and free nucleons are critical elements of core-collapse simulations of all dimensionality.

  2. Eye Lens Opacities Among Physicians Occupationally Exposed to Ionizing Radiation.

    PubMed

    Auvinen, Anssi; Kivelä, Tero; Heinävaara, Sirpa; Mrena, Samy

    2015-08-01

    We compared the frequency of lens opacities among physicians with and without occupational exposure to ionizing radiation, and estimated dose-response between cumulative dose and opacities. We conducted ophthalmologic examinations of 21 physicians with occupational exposure to radiation and 16 unexposed physicians. Information on cumulative radiation doses (mean 111 mSv) was based on dosimeter readings recorded in a national database on occupational exposures. Lens changes were evaluated using the Lens Opacities Classification System II, with an emphasis on posterior subcapsular (PSC) and cortical changes. Among the exposed physicians, the prevalences of cortical and PSC changes were both 11% (3/21), and the corresponding frequencies in the unexposed group were 44% (n = 7) and 6% (n = 1). For dose-response analysis, the data were pooled with 29 exposed physicians from our previous study. No association of either type of lens changes with cumulative recorded dose was observed. Our findings do not indicate an increased frequency of lens opacities in physicians with occupational exposure to ionizing radiation. However, the subjects in this study have received relatively low doses and therefore the results do not exclude small increases in lens opacities or contradict the studies reporting increases among interventional cardiologists with materially higher cumulative doses. PMID:25868644

  3. Cellular and extracellular matrix modulation of corneal stromal opacity.

    PubMed

    Torricelli, Andre A M; Wilson, Steven E

    2014-12-01

    Stromal transparency is a critical factor contributing to normal function of the visual system. Corneal injury, surgery, disease and infection elicit complex wound healing responses that serve to protect against insults and maintain the integrity of the cornea, and subsequently to restore corneal structure and transparency. However, in some cases these processes result in prolonged loss of corneal transparency and resulting diminished vision. Corneal opacity is mediated by the complex actions of many cytokines, growth factors, and chemokines produced by the epithelial cells, stromal cells, bone marrow-derived cells, lacrimal tissues, and nerves. Myofibroblasts, and the disorganized extracellular matrix produced by these cells, are critical determinants of the level and persistence of stromal opacity after corneal injury. Decreases in corneal crystallins in myofibroblasts and corneal fibroblasts contribute to cellular opacity in the stroma. Regeneration of a fully functional epithelial basement membrane (BM) appears to have a critical role in the maintenance of corneal stromal transparency after mild injuries and recovery of transparency when opacity is generated after severe injuries. The epithelial BM likely has a regulatory function whereby it modulates epithelium-derived growth factors such as transforming growth factor (TGF) β and platelet-derived growth factor (PDGF) that drive the development and persistence of myofibroblasts from precursor cells. The purpose of this article is to review the factors involved in the maintenance of corneal transparency and to highlight the mechanisms involved in the appearance, persistency and regression of corneal opacity after stromal injury. PMID:25281830

  4. A Free and Open Source Web-based Data Catalog Evaluation Tool

    NASA Astrophysics Data System (ADS)

    O'Brien, K.; Schweitzer, R.; Burger, E. F.

    2015-12-01

    For many years, the Unified Access Framework (UAF) project has worked to provide improved access to scientific data by leveraging widely used data standards and conventions. These standards include the Climate and Forecast (CF) metadata conventions, the Data Access Protocol (DAP) and various Open Geospatial Consortium (OGC) standards such as WMS and WCS. The UAF has also worked to create a unified access point for scientific data access through THREDDS and ERDDAP catalogs. A significant effort was made by the UAF project to build a catalog-crawling tool that was designed to crawl remote catalogs, analyze their content and then build a clean catalog that 1) represented only CF compliant data; 2) provided a uniform set of access services and 3) where possible, aggregated data in time. That catalog is available at http://ferret.pmel.noaa.gov/geoide/geoIDECleanCatalog.html.Although this tool has proved immensely valuable in allowing the UAF project to create a high quality data catalog, the need for a catalog evaluation service or tool to operate on a more local level also exists. Many programs that generate data of interest to the public are recognizing the utility and power of using the THREDDS data server (TDS) to serve that data. However, for some groups that lack the resources to maintain dedicated IT personnel, it can be difficult to set up a properly configured TDS. The TDS catalog evaluating service that is under development and will be discussed in this presentation is an effort, through the UAF project, to bridge that gap. Based upon the power of the original UAF catalog cleaner, the web evaluator will have the ability to scan and crawl a local TDS catalog, evaluate the contents for compliance with CF standards, analyze the services offered, and identify datasets where possible temporal aggregation would benefit data access. The results of the catalog evaluator will guide the configuration of the dataset in TDS to ensure that it meets the standards as

  5. Off-Line Catalog Production.

    ERIC Educational Resources Information Center

    OCLC Online Computer Library Center, Inc., Dublin, OH.

    The Ohio College Library Center's off-line catalog system is a limited technique for production of card catalogs. Unlike the on-line system, it cannotmake the resources of a region available to users in an individual institution, and it does not have the potential for significantly reducing rate of rise of library per-unit costs. In short, it is…

  6. Instruction Manual for Catalog Production.

    ERIC Educational Resources Information Center

    OCLC Online Computer Library Center, Inc., Dublin, OH.

    An instruction manual for using the catalog production system developed by the Ohio College Library Center (OCLC). The manual has a three-fold purpose: (1) to define the pack - describes the objective of the Catalog Profile Questionnaire and how to complete it, (2) to delineate request procedures - gives the membership various procedures to follow…

  7. "Friendly" Catalog Forgives User Errors.

    ERIC Educational Resources Information Center

    Cochrane, Pauline A.

    1982-01-01

    Describes the features and operations of a user-searchable online catalog called PaperChase which was developed and implemented for the retrieval of medical literature by physicians at Beth Israel Hospital in Boston. Interaction with the system and use of the catalog during its first year of operation are discussed. (JL)

  8. Authority Work for Transitional Catalogs.

    ERIC Educational Resources Information Center

    Matters, Marion

    1990-01-01

    Discusses authority work and authority control for personal names and corporate bodies in transitional archive catalogs. The importance of conformance with standards so that archival materials will collocate with other types of material in integrated catalogs is also discussed, together with enhanced authority work and techniques for archival…

  9. The WISE Catalog of Galactic HII Regions Website

    NASA Astrophysics Data System (ADS)

    Anderson, Loren D.

    2014-01-01

    The WISE Catalog of Galactic HII Regions has catalogued over 8000 objects, including all approximately 2000 known Galactic HII regions and over 6000 HII region candidates. As part of this effort, we created a flexible and interactive website to showcase the catalog contents and to allow quick access to the data. This website uses Google Fusion Tables and the Google Maps interface. We will detail the steps used to create the site, explain the user interface, and describe how other researchers can easily build off our experience to create similar sites of their own.

  10. Infrared astronomical data base and catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Schmitz, M.; Gezari, D. Y.; Mead, J. M.

    1981-01-01

    The NASA/Goddard Space Flight Center has developed a computer data base of infrared astronomical observations. The data base represents a machine-readable library of infrared observational data published in the relevant literature since 1960 for celestial sources outside the solar system. It likewise includes the contents of infrared surveys and catalogs. A catalog of infrared observations has been developed in both printed and magnetic-tape formats. The data base will be accessed through a bibliographic guide and an atlas of infrared source names and positions. Future plans also include two-dimensional graphical displays of infrared data and a user-interactive data terminal.

  11. The violet and ultraviolet opacity problem for carbon stars

    NASA Technical Reports Server (NTRS)

    Johnson, Hollis R.; Luttermoser, Donald G.; Faulkner, Danny R.

    1988-01-01

    The paper considers the longstanding problem of the 'violet opacity' in cool carbon stars by testing, through synthetic spectra, many new and previously suggested opacity sources, based on currently available model atmospheres for carbon stars and M giant stars. While several bound-free edges of neutral metals are important opacity sources, those of Na I at at 2413 A, Mg I at 2514 A, and particularly Ca I at 2940 A are especially significant. Collectively, thousands of atomic lines are important, and the enormous line of Mg I at 2852 A influences the spectrum well into the visible. The pseudocontinuum of C3 and the photoionization continuum of CH both play noticeable but secondary roles. Synthetic spectra form the carbon star models with and without polyatomic molecules fit nicely the collected observations of the well-observed carbon star TX Psc.

  12. Fractal Particles: Titan's Thermal Structure and IR Opacity

    NASA Technical Reports Server (NTRS)

    McKay, C. P.; Rannou, P.; Guez, L.; Young, E. F.; DeVincenzi, Donald (Technical Monitor)

    1998-01-01

    Titan's haze particles are the principle opacity at solar wavelengths. Most past work in modeling these particles has assumed spherical particles. However, observational evidence strongly favors fractal shapes for the haze particles. We consider the implications of fractal particles for the thermal structure and near infrared opacity of Titan's atmosphere. We find that assuming fractal particles with the optical properties based on laboratory tholin material and with a production rate that allows for a match to the geometric albedo results in warmer troposphere and surface temperatures compared to spherical particles. In the near infrared (1-3 microns) the predicted opacity of the fractal particles is up to a factor of two less than for spherical particles. This has implications for the ability of Cassini to image Titan's surface at 1 micron.

  13. Measuring the opacity of stellar interior matter in terrestrial laboratories

    NASA Astrophysics Data System (ADS)

    Bailey, James

    2015-11-01

    How does energy propagate from the core to the surface of the Sun, where it emerges to warm the Earth? Nearly a century ago Eddington recognized that the attenuation of radiation by stellar matter controls the internal structure of stars like the sun. Opacities for high energy density (HED) matter are challenging to calculate because accurate and complete descriptions of the energy levels, populations, and plasma effects such as continuum lowering and line broadening are needed for partially ionized atoms. This requires approximations, in part because billions of bound-bound and bound-free electronic transitions can contribute to the opacity. Opacity calculations, however, have never been benchmarked against laboratory measurements at stellar interior conditions. Laboratory opacity measurements were limited in the past by the challenges of creating and diagnosing sufficiently large and uniform samples at the extreme conditions found inside stars. In research conducted over more than 10 years, we developed an experimental platform on the Z facility and measured wavelength-resolved iron opacity at electron temperatures Te = 156-195 eV and densities ne = 0.7-4.0 x 1022 cm-3 - conditions very similar to the radiation/convection boundary zone within the Sun. The wavelength-dependent opacity in the 975-1775 eV photon energy range is 30-400% higher than models predict. This raises questions about how well we understand the behavior of atoms in HED plasma. These measurements may also help resolve decade-old discrepancies between solar model predictions and helioseismic observations. This talk will provide an overview of the measurements, investigations of possible errors, and ongoing experiments aimed at testing hypotheses to resolve the model-data discrepancy. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000.

  14. Radiation power losses and opacity of mid-Z impurities

    NASA Astrophysics Data System (ADS)

    Benredjem, D.; Calisti, A.; Pain, J. C.; Gilleron, F.

    2010-08-01

    We present results on opacity and radiation losses of mid-Z impurities in ICF conditions. Two approaches were investigated. The first one is based on a detailed calculation where the atomic database is provided by the MCDF code. Then a lineshape code (PPP) based on a fast algorithm was adapted to the calculation of emissivity and opacity profiles. The second approach is a statistical one. It involves high-order moments of the radiative power losses. Atomic calculations were performed with the Cowan code. The Normal Inverse Gaussian and the Generalized Gaussian distributions were then used to calculate the radiation power loss profile.

  15. Infrared astronomical data base and catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Schmitz, M.; Gezari, D. Y.; Mead, J. M.

    1982-01-01

    A computer data base of infrared astronomical observations has been established at NASA/Goddard Space Flight Center. It contains a summary of all infrared (1-100 microns) observations of celestial sources outside the solar system, published in the major scientific journals since 1960, as well as the contents of infrared surveys and catalogs. A Catalog of Infrared Observations (CIO) has been developed from the data base in printed and magnetic tape versions. A bibliographic Guide to the Infrared Astronomical Literature, and an Altas of Infrared Source Names and Positions will be published in conjunction with the catalog. Future plans include development of an interactive data system at Goddard which will give a user direct access to the computerized data.

  16. Enhancing Access to Space Science Literature

    NASA Astrophysics Data System (ADS)

    Bigwood, D. P.

    2006-03-01

    By participating in the Name Authority Program Component and Subject Authority Cooperative Program of the Program for Cooperative Cataloging of the Library of Congress even the smallest libraries can enhance access to the space science literature.

  17. Efficient and Scalable Cross-Matching of (Very) Large Catalogs

    NASA Astrophysics Data System (ADS)

    Pineau, F.-X.; Boch, T.; Derriere, S.

    2011-07-01

    Whether it be for building multi-wavelength datasets from independent surveys, studying changes in objects luminosities, or detecting moving objects (stellar proper motions, asteroids), cross-catalog matching is a technique widely used in astronomy. The need for efficient, reliable and scalable cross-catalog matching is becoming even more pressing with forthcoming projects which will produce huge catalogs in which astronomers will dig for rare objects, perform statistical analysis and classification, or real-time transients detection. We have developed a formalism and the corresponding technical framework to address the challenge of fast cross-catalog matching. Our formalism supports more than simple nearest-neighbor search, and handles elliptical positional errors. Scalability is improved by partitioning the sky using the HEALPix scheme, and processing independently each sky cell. The use of multi-threaded two-dimensional kd-trees adapted to managing equatorial coordinates enables efficient neighbor search. The whole process can run on a single computer, but could also use clusters of machines to cross-match future very large surveys such as GAIA or LSST in reasonable times. We already achieve performances where the 2MASS (˜470M sources) and SDSS DR7 (˜350M sources) can be matched on a single machine in less than 10 minutes. We aim at providing astronomers with a catalog cross-matching service, available on-line and leveraging on the catalogs present in the VizieR database. This service will allow users both to access pre-computed cross-matches across some very large catalogs, and to run customized cross-matching operations. It will also support VO protocols for synchronous or asynchronous queries.

  18. CEOS WGISS Integrated Catalog, A Catalog for Earth Observation Satellite Data

    NASA Astrophysics Data System (ADS)

    Enloe, Y.; Yapur, M.

    2011-12-01

    The Committee on Earth Observation Satellites (CEOS) was formed in 1984 to coordinate the world's civil space-borne observations of the Earth. More recently, CEOS and its member agencies have committed to provide the implementation of the space-based component of the Group on Earth Observation (GEO) Global Earth Observation System of Systems (GEOSS) Common Infrastructure (GCI). In the case of CEOS, there are a number of challenges in directly connecting the components and services of its member agencies to the GCI. In many cases, the existing catalog systems of the member agencies do not support the OGC Catalog Service for the Web (CSW) that has been selected as the standard for the GCI. Another challenge is related to the fact that collections of satellite data products are extremely large and constantly growing with millions of individual products. Harvesting the associated metadata into the clearinghouse of the GCI is not a practical alternative. In addition, the collection/granule hierarchy and unique spatial/temporal characteristics of satellite data and the user registration and asynchronous access requirements of the agency systems pose additional challenges. The CEOS approach has been to design and implement a CEOS WGISS Integrated Catalog (CWIC) that will serve as a community catalog of the products and services that are offered through its member's systems. CWIC will be based on a distributed search architecture and serve as a gateway between the GEO portal or community portals and clients and the CEOS agency systems. CWIC will receive standard search queries from these portals or clients all using the GEO supported catalog standard, the OGC CSW 2.0.2 and the WGISS Search Criteria for granule search and translate them into the native protocols of the underlying catalogs. Likewise, the result sets from the CEOS agency catalogs will be converted to the form that will be compatible with the portals and clients. The CWIC data provider partners include NOAA

  19. Historic Cataloging Costs, Issues, and Trends.

    ERIC Educational Resources Information Center

    Harris, George

    1989-01-01

    Reports research related to cataloging costs: (1) a comparison of length and complexity of Library of Congress cataloging copy between 1956 and 1981; (2) a survey of cataloging costs at academic libraries; and (3) cataloging costs and salaries since 1876 compared with the rate of inflation. The questionnaire and list of libraries surveyed are…

  20. Standards for Cataloging Nonprint Materials. Revised Edition.

    ERIC Educational Resources Information Center

    Quinly, William J.; And Others

    Rules and procedures for cataloging non-print media are provided in this manual of the Association for Educational Communications and Technology. The first section on cataloging rules covers all elements which should appear on the catalog card. After some comments on entries, the arrangement of catalog elements, and style, the elements of the…

  1. The Year's Work in Cataloging, 1999.

    ERIC Educational Resources Information Center

    Weiss, Amy K.; Carstens, Timothy V.

    2001-01-01

    Reviews the contributions to cataloging that have recently appeared in the print literature, as well as working documents publicly available on the Web developed by those responsible for creation of cataloging rules. Topics include: theory; revising AACR; summary of proposed changes; metadata; education of catalogers and cataloging staff; subject…

  2. The Gaia Attitude Star Catalog

    NASA Astrophysics Data System (ADS)

    Smart, R. L.

    2016-04-01

    We describe the Attitude Star Catalog produced for the Gaia mission. This catalog is being used by Gaia for the first on-ground attitude reconstruction. Originally it was simply a subset of the Initial Gaia Source List but this subset did not meet the isolation requirements and it contained a significant number of double entries. As a result during the commissioning phase of Gaia a new generation of this catalog, that better fulfills the attitude reconstruction requirements, was requested. Here we describe the production and properties of this new Attitude Star Catalog. The Attitude Star Catalog was made by combining 7 all sky catalogs and selecting entries based on magnitude, isolation and astrometric precision criteria. The catalog has 8173331 entries with estimates of the positions at 2000, proper motions and magnitudes (Gaia G, Gaia Grvs, red RF & blue BJ) in the magnitude range 7.0 < G < 13.4. It is publically available from the CDS Strasbourg and the IGSL web-site.

  3. From Telecommunications to Networking: The MELVYL Online Union Catalog and the Development of Intercampus Networks at the University of California.

    ERIC Educational Resources Information Center

    Lynch, Clifford A.

    1989-01-01

    Reviews the history of the network that supports the MELVYL online union catalog, describes current technological and policy issues, and discusses the role the network plays in integrating local automation, the union catalog, access to resource databases, and other initiatives. Sidebars by Mark Needleman discuss the TCP/IP protocol suite, internet…

  4. Professional Literature on Cataloging--Then and Now.

    ERIC Educational Resources Information Center

    Boll, John J.

    1985-01-01

    This overview of literature pertaining to philosophies and crosscurrents of cataloging highlights literature of 1905, cataloging codes, serials and textbooks on cataloging, cataloging aids, and selected themes 1905-1985 (cataloging for small library, union lists and catalogs, classification, catalog use studies, subject retrieval systems,…

  5. Engineering directorate technical facilities catalog

    NASA Technical Reports Server (NTRS)

    Maloy, Joseph E.

    1993-01-01

    The Engineering Directorate Technical Facilities Catalog is designed to provide an overview of the technical facilities available within the Engineering Directorate at the National Aeronautics and Space Administration (NASA), Lyndon B. Johnson Space Center (JSC) in Houston, Texas. The combined capabilities of these engineering facilities are essential elements of overall JSC capabilities required to manage and perform major NASA engineering programs. The facilities are grouped in the text by chapter according to the JSC division responsible for operation of the facility. This catalog updates the facility descriptions for the JSC Engineering Directorate Technical Facilities Catalog, JSC 19295 (August 1989), and supersedes the Engineering Directorate, Principle test and Development Facilities, JSC, 19962 (November 1984).

  6. SXS Catalog of Gravitational Waveforms

    NASA Astrophysics Data System (ADS)

    Hemberger, Daniel; SXS Collaboration

    2015-04-01

    Many aspects of gravitational-wave astronomy rely on numerical relativity for accurate models of gravitational waveforms. In recent years, several numerical relativity groups have built catalogs of numerical waveforms from binary black hole systems. I will report on the status of the Simulating Extreme Spacetimes (SXS) waveform catalog, which comprises simulations performed with the Spectral Einstein Code (SpEC). I will describe our approach for assessing numerical errors and convergence. Finally, I will discuss future plans to increase parameter space coverage of the catalog and to improve waveform accuracy.

  7. NASA Video Catalog

    NASA Technical Reports Server (NTRS)

    2006-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Subject Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  8. VizieR Online Data Catalog: c2d Spitzer final data release (DR4) (Evans+, 2003)

    NASA Astrophysics Data System (ADS)

    Evans, N. J., II; Allen, L. E.; Blake, G. A.; Boogert, A. C. A.; Bourke, T.; Harvey, P. M.; Kessler, J. E.; Koerner, D. W.; Lee, C. W.; Mundy, L. G.; Myers, P. C.; Padgett, D. L.; Pontoppidan, K.; Sargent, A. I.; Stapelfeldt, K. R.; van Dishoeck, E. F.; Young, C. H.; Young, K. E.

    2014-05-01

    This is the final delivery (DR4, Fall 2006 and Fall 2007) of the Spitzer Space Telescope "From Molecular Cores to Planet-Forming Disks" (c2d) Legacy Project. The data are also available as Enhanced Products from the Spitzer Science Center (SSC). c2d has delivered 867 catalogs. IRSA has merged these delivered catalogs into four groups - Clouds, Off-Cloud, Cores, Stars - and serves them through the general catalog search engine Gator. Many of the delivered catalogs, images and spectra are accessible through IRSA's general search service, Atlas. As a service to its users, the CDS has downloaded a dataset containing most of the c2d data (but not all columns) from the IRSA archive. The individual catalogs are listed below: C2D Fall '07 Full CLOUDS Catalog (CHA_II, LUP, OPH, PER, SER) C2D Fall '07 High Reliability (HREL) CLOUDS Catalog (CHA_II, LUP, OPH, PER, SER) C2D Fall '07 candidate Young Stellar Objects (YSO) CLOUDS Catalog (CHA_II, LUP, OPH, PER, SER) C2D Fall '07 Full OFF-CLOUD Catalog (CHA_II, LUP, OPH, PER, SER) C2D Fall '07 candidate Young Stellar Objects (YSO) OFF-CLOUD Catalog (CHA_II, LUP, OPH, PER, SER) C2D Fall '07 Full CORES Catalog C2D Fall '07 candidate Young Stellar Objects (YSO) CORES Catalog C2D Fall '07 Full STARS Catalog C2D Fall '07 candidate Young Stellar Objects (YSO) STARS Catalog These tables have been merged into a single table at CDS. All three SIRTF instruments (Infrared Array Camera [IRAC], Multiband Imaging Photometer for SIRTF [MIPS], and Infrared Spectrograph [IRS]) were used to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. (1 data file).

  9. Nonlinear RR Lyrae models with new Livermore opacities

    NASA Astrophysics Data System (ADS)

    Guzik, J. A.; Cox, A. N.

    Recently it was shown that a 20 percent opacity decrease in the 20,000-30,000 K region, as indicated by the new Livermore OPAL opacities, reconciles the discrepancy between pulsation and evolution masses of double-mode RR Lyrae variables. Nonlinear hydrodynamic calculations were performed for RR Lyrae models of mass 0.75 solar mass, 51 solar luminosity, and Z = 0.0001 (Osterhoff II type) including this opacity decrease. The Stellingwerf periodic relaxation method was used to converge the models to a limit cycle, and the Floquet matrix eigenvalues calculated to search for a tendency of the fundamental mode to grow from the full-amplitude overtone solution, and the overtone mode to grow from the full-amplitude fundamental solution, thereby predicting double-mode behavior. Models of Teff less than 7000 K with the opacity decrease have positive fundamental-mode growth rates in the overtone solution, in contrast to earlier results, and models with Teff less than 7000 have positive 1st overtone growth rates in the fundamental-mode behavior was not found.

  10. Nonlinear RR Lyrae models with new Livermore opacities

    NASA Astrophysics Data System (ADS)

    Guzik, J. A.; Cox, A. N.

    1993-12-01

    A. N. Cox recently showed that a 20% opacity decrease in the 20,000-30,000 K region as indicated by the new Livermore OPAL opacities reconciles the discrepancy between pulsation and evolution masses of double-mode RR Lyrae variables. Nonlinear hydrodynamic calculations were performed for RR Lyrae models of mass 0.75 solar mass, 51 solar luminosity, and Z = 0.0001 (Osterhoff II type) including this opacity decrease. The Stellingwerf periodic relaxation method was used to converge the models to a limit cycle, and the Floquet matrix eigenvalues calculated to search for a tendency of the fundamental mode to grow from the full-amplitude overtone solution, and the overtone mode to grow from the full-amplitude fundamental solution, thereby predicting double-mode behavior. Models of Teff is less than 7000 K with the opacity decrease have positive fundamental-mode growth rates in the overtone solution, in contrast to earlier results by Hodson and Cox (1982), and models with Teff is greater than 7000 have positive 1st overtone growth rates in the fundamental-mode solution, but double-mode behavior was not found.

  11. OH and CH continuous opacity in solar and stellar atmospheres

    NASA Technical Reports Server (NTRS)

    Kurucz, Robert L.; Van Dishoeck, Ewine F.; Tarafdar, S. P.

    1987-01-01

    Continuous absorption cross sections of OH and CH have been computed for the temperature range 1000 K to 9000 K. Both OH and CH produce significant ultraviolet opacity in the sun and cool stars. CH is also significant in the visible at 400 nm.

  12. First New Solar Models with OPAS Opacity Tables

    NASA Astrophysics Data System (ADS)

    Le Pennec, M.; Turck-Chièze, S.; Salmon, S.; Blancard, C.; Cossé, P.; Faussurier, G.; Mondet, G.

    2015-11-01

    Stellar seismology appears more and more as a powerful tool for a better determination of the fundamental properties of solar-type stars. However, the particular case of the Sun is still challenging. For about a decade now, the helioseismic sound-speed determination has continued to disagree with the standard solar model (SSM) prediction, questioning the reliability of this model. One of the sources of uncertainty could be in the treatment of the transport of radiation from the solar core to the surface. In this Letter, we use the new OPAS opacity tables, recently available for solar modeling, to address this issue. We discuss first the peculiarities of these tables, then we quantify their impact on the solar sound-speed and density profiles using the reduced OPAS tables taken on the grids of the OPAL ones. We use the two evolution codes, Modules for Experiments in Stellar Astrophysics and Code Liégeois d’Evolution Stellaire, that led to similar conclusions in the solar radiative zone. In comparison to commonly used OPAL opacity tables, the new solar models are computed for the most recent photospheric composition with OPAS tables and present improvements to the location of the base of the convective zone and to the description of the solar radiative zone in comparison to the helioseismic observations, even if the differences in the Rosseland mean opacity do not exceed 6%. We finally carry out a comparison to a solar model computed with the OP opacity tables.

  13. [Endothelial function in contact lens-induced deep corneal opacities].

    PubMed

    Göbbels, M; Wähning, A; Spitznas, M

    1989-01-01

    Deep stromal and preendothelial corneal opacities have been described to be a problem of growing importance in contact lens wearers, above all in those with a more than ten-year-old history of contact lens wearing. In the present study the corneal endothelial permeability of 21 patients with a more than ten-year-old history of contact lens (HEMA 38%) wearing has been determined and compared with that of an age-matched group of 8 healthy individuals without ocular disease. The corneal endothelial permeability has been measured by a computerized automated fluorophotometer (Coherent Radiation Fluorotron Master) after topical application of a Na-fluorescein solution according to the method described by Jones and Maurice. The corneal endothelial permeability of contact lens wearers with deep corneal opacities has been found to be significantly (p = 0.05) increased when compared with contact lens wearers without corneal opacities. Contact lens wearers without corneal opacities showed no significant increase of their endothelial permeability in comparison to the control group. PMID:2583637

  14. HELIOS-K: Opacity Calculator for Radiative Transfer

    NASA Astrophysics Data System (ADS)

    Grimm, Simon L.; Heng, Kevin

    2015-03-01

    HELIOS-K is an opacity calculator for exoplanetary atmospheres. It takes a line list as an input and computes the line shapes of an arbitrary number of spectral lines (~millions to billions). HELIOS-K is capable of computing 100,000 spectral lines in 1 second; it is written in CUDA and is optimized for graphics processing units (GPUs).

  15. 40 CFR 75.14 - Specific provisions for monitoring opacity.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Specific provisions for monitoring... performance specifications in Performance Specification 1 in appendix B to part 60 of this chapter. Any continuous opacity monitoring system previously certified to meet Performance Specification 1 shall be...

  16. 40 CFR 75.14 - Specific provisions for monitoring opacity.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 16 2011-07-01 2011-07-01 false Specific provisions for monitoring... performance specifications in Performance Specification 1 in appendix B to part 60 of this chapter. Any continuous opacity monitoring system previously certified to meet Performance Specification 1 shall be...

  17. 40 CFR Figure 1 to Subpart Qqq of... - Data Summary Sheet for Determination of Average Opacity

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... for Determination of Average Opacity Clock time Number of converters blowing Converter aisle activity... interval?(yes or no) Average opacity for 1-minute interval blowing without visible emission...

  18. 40 CFR Figure 1 to Subpart Qqq of... - Data Summary Sheet for Determination of Average Opacity

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... for Determination of Average Opacity Clock time Number of converters blowing Converter aisle activity... interval?(yes or no) Average opacity for 1-minute interval blowing without visible emission...

  19. INSTRUMENTATION FOR MONITORING THE OPACITY OF PARTICULATE EMISSIONS CONTAINING CONDENSED WATER

    EPA Science Inventory

    On-stack instrumentation and methodology were developed to monitor the opacity of particulate pollutants in stationary source emissions containing condensed water. The instrument continuously extracts and measures the opacity of representative samples of particulate effluent. It ...

  20. LTE model atmospheres with new opacities. I. Methods and general properties

    NASA Astrophysics Data System (ADS)

    Behara, N. T.; Jeffery, C. S.

    2006-05-01

    We describe an opacity sampled version of the LTE model atmosphere code sterne with revised continuous opacities. In particular, we examine the results of replacing the existing treatment of the continuous opacities which followed the method of Kurucz (1970, SAOSR, No. 309) and Peach (1970, MNRAS, 73, 1), with photoionization cross-sections from the Opacity Project and the IRON Project, and the effects of substituting an opacity distribution function method for treating the line opacities with an opacity sampling method. In studying the application of these new models to atmospheres with hydrogen-rich and extreme chemical compositions, we find the new opacity treatment increases the temperature in the line forming region by up to 3000 K for extremely hydrogen-poor stars and up to 1250 K for hydrogen-rich stars with T_eff = 30 000 K and log g = 3.00. This translates into systematically cooler effective temperature measurements for these types of stars.

  1. A Comprehensive Opacities/Atomic Database for the Analysis of Astrophysical Spectra and Modeling

    NASA Technical Reports Server (NTRS)

    Pradhan, Anil K. (Principal Investigator)

    1997-01-01

    The main goals of this ADP award have been accomplished. The electronic database TOPBASE, consisting of the large volume of atomic data from the Opacity Project, has been installed and is operative at a NASA site at the Laboratory for High Energy Astrophysics Science Research Center (HEASRC) at the Goddard Space Flight Center. The database will be continually maintained and updated by the PI and collaborators. TOPBASE is publicly accessible from IP: topbase.gsfc.nasa.gov. During the last six months (since the previous progress report), considerable work has been carried out to: (1) put in the new data for low ionization stages of iron: Fe I - V, beginning with Fe II, (2) high-energy photoionization cross sections computed by Dr. Hong Lin Zhang (consultant on the Project) were 'merged' with the current Opacity Project data and input into TOPbase; (3) plans laid out for a further extension of TOPbase to include TIPbase, the database for collisional data to complement the radiative data in TOPbase.

  2. Web-Based Online Public Access Catalogues of IIT Libraries in India: An Evaluative Study

    ERIC Educational Resources Information Center

    Madhusudhan, Margam; Aggarwal, Shalini

    2011-01-01

    Purpose: The purpose of the paper is to examine the various features and components of web-based online public access catalogues (OPACs) of IIT libraries in India with the help of a specially designed evaluation checklist. Design/methodology/approach: The various features of the web-based OPACs in six IIT libraries (IIT Delhi, IIT Bombay, IIT…

  3. Lunar soils grain size catalog

    NASA Technical Reports Server (NTRS)

    Graf, John C.

    1993-01-01

    This catalog compiles every available grain size distribution for Apollo surface soils, trench samples, cores, and Luna 24 soils. Original laboratory data are tabled, and cumulative weight distribution curves and histograms are plotted. Standard statistical parameters are calculated using the method of moments. Photos and location comments describe the sample environment and geological setting. This catalog can help researchers describe the geotechnical conditions and site variability of the lunar surface essential to the design of a lunar base.

  4. Water Resources Division training catalog

    USGS Publications Warehouse

    Hotchkiss, W.R.; Foxhoven, L.A.

    1984-01-01

    The National Training Center provides technical and management sessions nesessary for the conductance of the U.S. Geological Survey 's training programs. This catalog describes the facilities and staff at the Lakewood Training Center and describes Water Resources Division training courses available through the center. In addition, the catalog describes the procedures for gaining admission, formulas for calculating fees, and discussion of course evaluations. (USGS)

  5. Astronomical catalog desk reference, 1994 edition

    NASA Technical Reports Server (NTRS)

    1994-01-01

    The Astronomical Catalog Desk Reference is designed to aid astronomers in locating machine readable catalogs in the Astronomical Data Center (ADC) archives. The key reference components of this document are as follows: A listing of shortened titles for all catalogs available from the ADC (includes the name of the lead author and year of publication), brief descriptions of over 300 astronomical catalogs, an index of ADC catalog numbers by subject keyword, and an index of ADC catalog numbers by author. The heart of this document is the set of brief descriptions generated by the ADC staff. The 1994 edition of the Astronomical Catalog Desk Reference contains descriptions for over one third of the catalogs in the ADC archives. Readers are encouraged to refer to this section for concise summaries of those catalogs and their contents.

  6. EVIDENCE FOR ENVIRONMENTAL CHANGES IN THE SUBMILLIMETER DUST OPACITY

    SciTech Connect

    Martin, Peter G.; Roy, Arabindo; Miville-Deschenes, Marc-Antoine; Bontemps, Sylvain; Ade, Peter A. R.; Griffin, Matthew; Hargrave, Peter C.; Mauskopf, Philip; Bock, James J.; Chapin, Edward L.; Halpern, Mark; Marsden, Gaelen; Devlin, Mark J.; Dicker, Simon R.; Klein, Jeff; Gundersen, Joshua O.; Hughes, David H.; Netterfield, Calvin B.; Olmi, Luca; Patanchon, Guillaume; and others

    2012-05-20

    The submillimeter opacity of dust in the diffuse interstellar medium (ISM) in the Galactic plane has been quantified using a pixel-by-pixel correlation of images of continuum emission with a proxy for column density. We used multi-wavelength continuum data: three Balloon-borne Large Aperture Submillimeter Telescope bands at 250, 350, and 500 {mu}m and one IRAS band at 100 {mu}m. The proxy is the near-infrared color excess, E(J - K{sub s}), obtained from the Two Micron All Sky Survey. Based on observations of stars, we show how well this color excess is correlated with the total hydrogen column density for regions of moderate extinction. The ratio of emission to column density, the emissivity, is then known from the correlations, as a function of frequency. The spectral distribution of this emissivity can be fit by a modified blackbody, whence the characteristic dust temperature T and the desired opacity {sigma}{sub e}(1200) at 1200 GHz or 250 {mu}m can be obtained. We have analyzed 14 regions near the Galactic plane toward the Vela molecular cloud, mostly selected to avoid regions of high column density (N{sub H} > 10{sup 22} cm{sup -2}) and small enough to ensure a uniform dust temperature. We find {sigma}{sub e}(1200) is typically (2-4) Multiplication-Sign 10{sup -25} cm{sup 2} H{sup -1} and thus about 2-4 times larger than the average value in the local high Galactic latitude diffuse atomic ISM. This is strong evidence for grain evolution. There is a range in total power per H nucleon absorbed (and re-radiated) by the dust, reflecting changes in the strength of the interstellar radiation field and/or the dust absorption opacity. These changes in emission opacity and power affect the equilibrium T, which is typically 15 K, colder than at high latitudes. Our analysis extends, to higher opacity and lower temperature, the trend of increasing {sigma}{sub e}(1200) with decreasing T that was found at high latitudes. The recognition of changes in the emission opacity

  7. WCSTools: Catalogs, Headers, and FITS Files, Oh My!

    NASA Astrophysics Data System (ADS)

    Mink, J.

    2014-05-01

    WCSTools is a package of tasks written in very portable C, the main purpose of which is to assign world coordinate systems to images of astronomical fields. These tools, which access source and manipulate image headers, compute transformations between pixels and spatial coordinates, and convert times, use a self-contained library of subroutines which have been combined into command-line executable tasks. Separate use of the various catalog searching tasks as well as the variety of ways in which the header and file reading and writing tasks can aid astronomical work will be discussed. Access to the USNO UCAC3 and UCAC4 catalogs as well as implementation of the IRAF ZPX polynomial projection and the SCAMP image distortion model will be described, as will other major fixes and upgrades, ending with brief note as to the advantages and disadvantages of distributing understandable, open source code.

  8. Small satellite debris catalog maintenance issues

    NASA Technical Reports Server (NTRS)

    Jackson, Phoebe A.

    1991-01-01

    The United States Space Command (USSPACECOM) is a unified command of the Department of Defense, and one of its tasks is to detect, track, identify, and maintain a catalog of all man-made objects in Earth orbit. This task is called space surveillance, and the most important tool for space surveillance is the satellite catalog. The command's reasons for performing satellite catalog maintenance is presented. A satellite catalog is described, and small satellite-debris catalog-maintenance issues are identified. The underlying rationale is to describe the catalog maintenance services so that the members of the community can use them with assurance.

  9. Uncontrolled asthma and recurring pulmonary opacities: just asthma?

    PubMed Central

    Davidsen, Jesper Rømhild; Madsen, Poul Henning; Laursen, Christian B

    2014-01-01

    In asthma, when comorbidities and common causes of poor control have been considered and treated, the clinician may speculate, ‘Is it all asthma?’. In patients with uncontrolled atopic asthma with recurring episodes of symptoms mimicking pneumonia, the suspicion of allergic bronchopulmonary aspergillosis (ABPA) should remain high. ABPA is caused by a complex immunological hypersensitivity reaction to colonisation with Aspergillus fumigatus in the bronchial tree, and is characterised by the presence of atopic asthma, blood eosinophilia, migrating pulmonary opacities and potential bronchiectasis. This case report describes a delay in diagnosing ABPA which was imitating pneumonia. The clinician should pay increased attention to ABPA and test for this in patients with uncontrolled asthma with an ongoing requirement for oral corticosteroids and/or antibiotics and with pulmonary opacities on chest imaging. PMID:24862414

  10. Model-independent constraints on the cosmic opacity

    NASA Astrophysics Data System (ADS)

    Holanda, R. F. L.; Carvalho, J. C.; Alcaniz, J. S.

    2013-04-01

    We use current measurements of the expansion rate H(z) and cosmic background radiation bounds on the spatial curvature of the Universe to impose cosmological model-independent constraints on cosmic opacity. To perform our analyses, we compare opacity-free distance modulus from H(z) data with those from two type Ia supernovae compilations, namely, the Union2.1 plus the most distant spectroscopically confirmed SNe Ia (SCP-0401 at z = 1.713) and two Sloan Digital Sky Survey (SDSS) subsamples. We find that a completely transparent universe is in full agreement with the Union 2.1 + SNe Ia SCP-0401 sample. For the SDSS compilations, such universe is compatible with observations at < 1.5σ level regardless the SNe Ia light-curve fitting used.

  11. Precise Opacities for Astrophysics (Fe and Ni) and ICF modeling

    NASA Astrophysics Data System (ADS)

    Klapisch, Marcel; Gilles, Dominique; Busquet, Michel

    2015-11-01

    Opacities of FeIII - FeXV at Te =15-20 eV and densities 1.e16-1.e23 cm-3 have been computed with an improved version of the HULLAC code. More than 109 transitions have been computed, with different ways to account for configuration interactions (CI). Spectra with CI limited to each non-relativistic configuration (CIinNRC) are compared to more extended full Relativistic CI (RCI). The effect of increasing the size of the CI basis is investigated. These comparisons enable optimizing the method for each temperature/density regime. With powerful computers, HULLAC -generated opacity databases could then be envisioned, bypassing the need for statistical approximations.

  12. Seismology of Sun and stars and related opacity laboratory measurements

    NASA Astrophysics Data System (ADS)

    Turck-Chièze, S.

    2012-02-01

    CNES, ESA and NASA have invested in helioseismic and asteroseismic disciplines for 2 decades with SoHO (1995-2015), COROT (2006-2013), KEPLER (2009-2014), PICARD (2010-2013) and SDO (2010-2015). These missions focus on the stellar internal dynamics and their influence of neighboring planets. Progress along this path requires that the microscopic physics is well under control, but several seismic probes indicate some discrepancies which justify new investigations of the energy transport in radiative zones of the Sun and massive stars, despite strong efforts dedicated to reaction rates, screening, equation of state and opacity coefficients between 1990 and 2000. We describe here how the OPAC consortium tackles the complex problem of photon absorption by matter both theoretically and experimentally, by using high energy laser facilities. These studies might be also useful for other disciplines like fusion for energy and X-ray spectroscopy astronomy.

  13. [Keratouveitis and lens opacity caused by butterfly hair].

    PubMed

    Domngang Noche, C; Kengmogne, B; Bella, A L

    2012-01-01

    Butterfly hair is known to cause eye injury. In Africa, incriminated butterflies are Hylesia (spp). We report a case of a sub-epithelial keratitis associated with anterior uveitis following a trauma by a butterfly that was complicated by late lens opacity due to butterfly hair. Ocular lesions caused by butterfly hair are rare, but require an urgent management to prevent late and severe complications due to intraocular migration of the hairs. PMID:22978182

  14. Iron-group opacities in the envelopes of massive stars

    NASA Astrophysics Data System (ADS)

    Le Pennec, Maëlle; Turck-Chièze, Sylvaine

    2014-02-01

    β Cephei and SPB stars are pulsating stars for which the excitation of modes by the κ mechanism, due to the iron-group opacity peak, seems puzzling. We have first investigated the origins of the differences noticed between OP and OPAL iron and nickel opacity calculations (up to a factor 2), a fact which complicates the interpretation. To accomplish this task, new well-qualified calculations (SCO-RCG, HULLAC and ATOMIC) have been performed and compared to values of these tables, and most of the differences are now well understood. Next, we have exploited a dedicated experiment on chromium, iron and nickel, conducted at the LULI 2000 facilities. We found that, in the case of iron, detailed calculations (OP, ATOMIC and HULLAC) show good agreement, contrary to all of the non-detailed calculations. However, in the case of nickel, OP calculations show large discrepancies with the experiments but also with other codes. Thus, the opacity tables need to be revised in the thermodynamical conditions corresponding to the peak of the iron group. Consequently we study the evolution of this iron peak with changes in stellar mass, age, and metallicity to determine the relevant region where these tables should be revised.

  15. The RBV metadata catalog

    NASA Astrophysics Data System (ADS)

    Andre, Francois; Fleury, Laurence; Gaillardet, Jerome; Nord, Guillaume

    2015-04-01

    RBV (Réseau des Bassins Versants) is a French initiative to consolidate the national efforts made by more than 15 elementary observatories funded by various research institutions (CNRS, INRA, IRD, IRSTEA, Universities) that study river and drainage basins. The RBV Metadata Catalogue aims at giving an unified vision of the work produced by every observatory to both the members of the RBV network and any external person interested by this domain of research. Another goal is to share this information with other existing metadata portals. Metadata management is heterogeneous among observatories ranging from absence to mature harvestable catalogues. Here, we would like to explain the strategy used to design a state of the art catalogue facing this situation. Main features are as follows : - Multiple input methods: Metadata records in the catalog can either be entered with the graphical user interface, harvested from an existing catalogue or imported from information system through simplified web services. - Hierarchical levels: Metadata records may describe either an observatory, one of its experimental site or a single dataset produced by one instrument. - Multilingualism: Metadata can be easily entered in several configurable languages. - Compliance to standards : the backoffice part of the catalogue is based on a CSW metadata server (Geosource) which ensures ISO19115 compatibility and the ability of being harvested (globally or partially). On going tasks focus on the use of SKOS thesaurus and SensorML description of the sensors. - Ergonomy : The user interface is built with the GWT Framework to offer a rich client application with a fully ajaxified navigation. - Source code sharing : The work has led to the development of reusable components which can be used to quickly create new metadata forms in other GWT applications You can visit the catalogue (http://portailrbv.sedoo.fr/) or contact us by email rbv@sedoo.fr.

  16. Preliminary EUNIS-06 EUV Spectral Catalog

    NASA Astrophysics Data System (ADS)

    Thomas, Roger J.; Rabin, D. M.

    2006-06-01

    The recent 2006 April 12 flight of NASA/GSFC's sounding rocket payload, the EUV Normal-Incidence Spectrograph (EUNIS-06), produced 145 spectral images in each of two optical channels with passbands of 170--205 Å and 300--370 Å, respectively. These spectra are spatially resolved along slit lengths of about 660 arcsec covering portions of NOAA Active Region 10871 at S07E28, as well as quiet areas near disk center. We present here examples of spatial variations recorded in some of the stronger lines, along with a preliminary catalog of all spectral lines found by averaging the complete data set.EUNIS is supported by the NASA Heliophysics Division's Solar & Heliospheric Physics Supporting Research and Technology and Low Cost Access to Space Program.

  17. Suggested Minimum Cataloging Standards for Arizona.

    ERIC Educational Resources Information Center

    Scott, Sharon

    1979-01-01

    Notes problems with cataloging library materials in the small and medium sized public library and suggests interpretations of the Anglo-American cataloging rules, with recommendations for their adaptation to smaller libraries. (CWM)

  18. Effective Tree Scattering and Opacity at L-Band

    NASA Technical Reports Server (NTRS)

    Kurum, Mehmet; O'Neill, Peggy E.; Lang, Roger H.; Joseph, Alicia T.; Cosh, Michael H.; Jackson, Thomas J.

    2011-01-01

    This paper investigates vegetation effects at L-band by using a first-order radiative transfer (RT) model and truck-based microwave measurements over natural conifer stands to assess the applicability of the tau-omega) model over trees. The tau-omega model is a zero-order RT solution that accounts for vegetation effects with effective vegetation parameters (vegetation opacity and single-scattering albedo), which represent the canopy as a whole. This approach inherently ignores multiple-scattering effects and, therefore, has a limited validity depending on the level of scattering within the canopy. The fact that the scattering from large forest components such as branches and trunks is significant at L-band requires that zero-order vegetation parameters be evaluated (compared) along with their theoretical definitions to provide a better understanding of these parameters in the retrieval algorithms as applied to trees. This paper compares the effective vegetation opacities, computed from multi-angular pine tree brightness temperature data, against the results of two independent approaches that provide theoretical and measured optical depths. These two techniques are based on forward scattering theory and radar corner reflector measurements, respectively. The results indicate that the effective vegetation opacity values are smaller than but of similar magnitude to both radar and theoretical estimates. The effective opacity of the zero-order model is thus set equal to the theoretical opacity and an explicit expression for the effective albedo is then obtained from the zero- and first- order RT model comparison. The resultant albedo is found to have a similar magnitude as the effective albedo value obtained from brightness temperature measurements. However, it is less than half of that estimated using the theoretical calculations (0.5 - 0.6 for tree canopies at L-band). This lower observed albedo balances the scattering darkening effect of the large theoretical albedo

  19. Improving Data Catalogs with Free and Open Source Software

    NASA Astrophysics Data System (ADS)

    Schweitzer, R.; Hankin, S.; O'Brien, K.

    2013-12-01

    The Global Earth Observation Integrated Data Environment (GEO-IDE) is NOAA's effort to successfully integrate data and information with partners in the national US-Global Earth Observation System (US-GEO) and the international Global Earth Observation System of Systems (GEOSS). As part of the GEO-IDE, the Unified Access Framework (UAF) is working to build momentum towards the goal of increased data integration and interoperability. The UAF project is moving towards this goal with an approach that includes leveraging well known and widely used standards, as well as free and open source software. The UAF project shares the widely held conviction that the use of data standards is a key ingredient necessary to achieve interoperability. Many community-based consensus standards fail, though, due to poor compliance. Compliance problems emerge for many reasons: because the standards evolve through versions, because documentation is ambiguous or because individual data providers find the standard inadequate as-is to meet their special needs. In addition, minimalist use of standards will lead to a compliant service, but one which is of low quality. In this presentation, we will be discussing the UAF effort to build a catalog cleaning tool which is designed to crawl THREDDS catalogs, analyze the data available, and then build a 'clean' catalog of data which is standards compliant and has a uniform set of data access services available. These data services include, among others, OPeNDAP, Web Coverage Service (WCS) and Web Mapping Service (WMS). We will also discuss how we are utilizing free and open source software and services to both crawl, analyze and build the clean data catalog, as well as our efforts to help data providers improve their data catalogs. We'll discuss the use of open source software such as DataNucleus, Thematic Realtime Environmental Distributed Data Services (THREDDS), ncISO and the netCDF Java Common Data Model (CDM). We'll also demonstrate how we are

  20. Searching the SOHO online catalogs

    NASA Technical Reports Server (NTRS)

    Thompson, William; Yurow, Ron

    1994-01-01

    The SOHO on-line catalogs will contain information about the observations from several made or planned campaigns, that must be available to scientists who wish to use SOHO data. The World Wide Web (WWW) was chosen as the interface to the SOHO on-line catalogs, because it is easy to use, well suited to a geographically distributed user community, and freely available. Through the use of a forms-capable WWW client such as Mosaic or Lynx, a scientist will be able to browse through the catalogs of observations in a very simple, self explanatory way. Data files can then be selected from the returned lists for either immediate transferring or sending on tape by mail, with appropriate checks for whether data is in the public domain or not.

  1. The current catalog--how current?

    PubMed

    Sargent, C W

    1968-07-01

    NLM's Current Catalog has recently come in for some criticism. To be useful as a tool in acquisition and cataloging, currency in receipt of the Current Catalog is necessary. A survey of 263 titles with 1967 imprints, which were received by the Library of the Medical Sciences, University of New Mexico School of Medicine, was made to determine the correlation between the receipt of these books in the library and their appearance in the Current Catalog. PMID:5695111

  2. Solar-terrestrial data access distribution and archiving

    NASA Technical Reports Server (NTRS)

    1984-01-01

    It is recommended that a central data catalog and data access network (CDC/DAN) for solar-terrestrial research be established, initially as a NASA pilot program. The system is envisioned to be flexible and to evolve as funds permit, starting from a catalog to an access network for high-resolution data. The report describes the various functional requirements for the CDC/DAN, but does not specify the hardware and software architectures as these are constantly evolving. The importance of a steering committee, working with the CDC/DAN organization, to provide scientific guidelines for the data catalog and for data storage, access, and distribution is also stressed.

  3. Statistical analysis of the 'Almagest' star catalog

    NASA Astrophysics Data System (ADS)

    Kalashnikov, V. V.; Nosovskii, G. V.; Fomenko, A. T.

    The star catalog contained in the 'Almagest', Ptolemy's classical work of astronomy, is examined. An analysis method is proposed which allows the identification of various types of errors committed by the observer. This method not only removes many of the contradictions contained in the catalog but also makes it possible to determine the time period during which the catalog was compiled.

  4. The Cataloging Internship in Academic Libraries.

    ERIC Educational Resources Information Center

    McClellan, Edna

    1995-01-01

    Summarizes the history of library internships in cataloging. Reviews a survey of 112 academic practitioners and educators regarding the value of cataloging internships in the masters of library science program. Findings indicate that internships are needed to educate library students. Sample cataloging internship programs are appended. (JMV)

  5. Notes for Serials Cataloging. Second Edition.

    ERIC Educational Resources Information Center

    Geer, Beverley, Ed.; Caraway, Beatrice L., Ed.

    Notes are indispensable to serials cataloging. Researchers, reference librarians, and catalogers regularly use notes on catalog records and, as the audience for these notes has expanded from the local library community to the global Internet community, the need for notes to be cogent, clear, and useful is greater than ever. This book is a…

  6. Standards for Cataloging Nonprint Materials. Third Edition.

    ERIC Educational Resources Information Center

    Quinly, William J.; And Others

    Rules for cataloging non-print media are presented. The publication is devoted exclusively to cataloging standards since coding of many non-print media is included in the Library of Congress MARC system. All elements which should appear on the cataloging card are identified; the elements of the description are described with the MARC format in…

  7. A System for Cataloging Computer Software

    ERIC Educational Resources Information Center

    Pearson, Karl M., Jr.

    1973-01-01

    As a form of nonbook material, computer software can be cataloged and the collection managed by a library. The System Development Corporation (SDC) Technical Information Center has adapted the Anglo-American Cataloging Rules for descriptive cataloging of computer programs. (11 references) (Author/SJ)

  8. Cooperative Catalog Conversion Study. Final Report.

    ERIC Educational Resources Information Center

    Peat, Marwick, Mitchell and Co., Washington, DC.

    Cost estimates provided by cataloging vendors during January 1981 are analyzed to identify the costs of catalog conversion options and alternatives to the card catalog for six Minnesota regional library systems. Following an executive summary of the study is a discussion of its background, scope, objectives, data gathering methodology, and…

  9. The Implementation of the Greek Union Catalog.

    ERIC Educational Resources Information Center

    Katsirikou, Anthi

    This paper is based on the results of the study of the Work Group of Bibliographic Standards for the Greek union catalog, the first stage of Greek academic library union catalog development. The first section lists the objectives of the union catalog. The state of the art of Greek academic libraries is discussed in the second section. The lack of…

  10. In the Iron Age of Cataloging.

    ERIC Educational Resources Information Center

    Van Houten, Stephen

    1981-01-01

    Reviews the questions and problems in library cataloging addressed through the nineteenth and early twentieth centuries by Panizzi, Cutter, and Lubetzky; asks whether computerization represents an advance that will free catalogers from earlier difficulties; and discusses the ongoing relevance of the principles of cataloging. A reference list is…

  11. Viking orbiter stereo imaging catalog

    NASA Technical Reports Server (NTRS)

    Blasius, K. R.; Vetrone, A. V.; Martin, M. D.

    1980-01-01

    The extremely long missions of the two Viking Orbiter spacecraft produced a wealth of photos of surface features. Many of which can be used to form stereo images allowing the earth-bound student of Mars to examine the subject in 3-D. This catalog is a technical guide to the use of stereo coverage within the complex Viking imaging data set. Since that data set is still growing (January, 1980, about 3 1/2 years after the mission began), a second edition of this catalog is planned with completion expected about November, 1980.

  12. The Integrated Library: Encouraging Access to Multimedia Materials. Second Edition.

    ERIC Educational Resources Information Center

    Weihs, Jean

    This guide argues that cataloging rules for all materials, both book and nonbook, should be based on the same principles so that all catalog records can be in one file. The guidance in this book applies to collections that are directly accessible to the public where archival conservation plays little role. It is written for libraries that…

  13. Catalog It! A Guide to Cataloging School Library Materials.

    ERIC Educational Resources Information Center

    Kaplan, Allison G.; Riedling, Ann Marlow

    This book is designed for courses that prepare college and university students for undergraduate or graduate degrees in school library media. Its objectives are to present the theory and practice of cataloging and classification in the school library environment. The manual is divided into eight chapters. Chapter 1: A Brief History of Cataloging…

  14. The Seamount Catalog in EarthRef.org

    NASA Astrophysics Data System (ADS)

    Gotberg, N. K.; Koppers, A. A.; Staudigel, H.; Perez, J.

    2004-12-01

    Seamounts are important to research and education in many scientific fields, providing a wide range of data on physical, chemical, biological and geological processes. In order to make a diverse set of seamount data accessible we have developed the Seamount Catalog in EarthRef.org, available through the http://earthref.org/databases/SC/. The primary goal of the Seamount Catalog is to provide access to digital data files on a large assortment of interdisciplinary seamount research. The catalog can be searched at a variety of ability or expert levels allowing it to be used from basic education to advanced research. Each seamount is described in terms of its location, height, volume, elongation, azimuth, irregularity, rifts, morphological classification and relation to other features. GEBCO (General Bathymetric Chart of the Ocean) gazetteer data (2002; 2003) is included in the database in order to provide information on the history, discovery and names of the seamounts. Screen-optimized bathymetry maps, grid files and the original multibeam data files are available for online viewing with higher resolution downloadable versions (AI, PS, PDF) also offered. The data files for each seamount include a map made from the multibeam data only, a map made from Smith and Sandwell's (1996) predicted bathymetry, a merged map incorporating both data sets, and a map showing the differences between the two data sets. We are working towards expanding the Seamount Catalog by integrating bathymetry data from various sources, developing and linking disciplinary reference models, and integrating information from multiple disciplines and from the literature. We hope to create a data integrative environment that provides access to seamount data and the tools needed for working with that data.

  15. URAT Parallax Catalog: the largest parallax catalog since Hipparcos

    NASA Astrophysics Data System (ADS)

    Finch, Charlie T.; Zacharias, Norbert

    2016-05-01

    The first USNO Robotic Astrometric Telescope catalog (URAT1) was released in April 2015. For determining parallaxes we did go beyond that and utilize all Northern Hemisphere URAT observations. These data include all individual exposures from April 2012 to June 2015 giving a larger epoch baseline for determining parallaxes over the 2-year span of URAT1 published data. The URAT Parallax Catalog (UPC) is a supplement to 'Parallax Results From URAT Epoch Data' (Finch and Zacahrias 2016) where we explain the procedures and focus on stars with a parallax of 40 mas or larger. Here we release all significant parallaxes from the URAT northern epoch data.The UPC contains 112177 parallaxes covering the magnitude range 6.56 to 16.93 in the URAT band-pass north of -12.752 deg declination. The over 40 million formal URAT parallax solutions have been compared to entries in the Hipparcos Catalog, The Yale Parallax Catalog, (Finch and Zacharias 2016), MEarth parallaxes and SIMBAD database, respectively to obtain prior published parallaxes and star name information. We release the 58,677 URAT parallaxes which have a match to either of those catalogs without implementing any extra cuts. For the stars with no prior published parallax we implement a set of stringent cuts to reduce possible erroneous parallaxes resulting in over 53,000 new trigonometric parallaxes from URAT data alone with a high level of confidence. The average parallax precision is 10.8 mas and 4.3 mas for stars having a known parallax and stars without a prior known parallax respectively.

  16. Catalog card production with a programmable terminal.

    PubMed Central

    McTigue, E; Robinson, M E; Saver, B; Schultz, C K

    1977-01-01

    Application of a programmable terminal and printer to the cataloging task of a small medical library is described. The application is independent of a computer; the terminal is used in "local" mode only. Full sets of catalog cards are produced, following a single typing of descriptive cataloging data and tracings. Books can be cataloged the same day they are received. Actual cost per book is just over a dollar, for equipment rental, card stock, and the cataloger's time at the console, after call number, tracings, and main entry for the book have been determined. Images PMID:831883

  17. Second Line of Defense Master Spares Catalog

    SciTech Connect

    Henderson, Dale L.; Muller, George; Mercier, Theresa M.; Brigantic, Robert T.; Perkins, Casey J.; Cooley, Scott K.

    2012-11-20

    This catalog is intended to be a comprehensive listing of repair parts, components, kits, and consumable items used on the equipment deployed at SLD sites worldwide. The catalog covers detection, CAS, network, ancillary equipment, and tools. The catalog is backed by a Master Parts Database which is used to generate the standard report views of the catalog. The master parts database is a relational database containing a record for every part in the master parts catalog along with supporting tables for normalizing fields in the records. The database also includes supporting queries, database maintenance forms, and reports.

  18. Catalog card production with a programmable terminal.

    PubMed

    McTigue, E; Robinson, M E; Saver, B; Schultz, C K

    1977-01-01

    Application of a programmable terminal and printer to the cataloging task of a small medical library is described. The application is independent of a computer; the terminal is used in "local" mode only. Full sets of catalog cards are produced, following a single typing of descriptive cataloging data and tracings. Books can be cataloged the same day they are received. Actual cost per book is just over a dollar, for equipment rental, card stock, and the cataloger's time at the console, after call number, tracings, and main entry for the book have been determined. PMID:831883

  19. Greenbook Abstract and Catalog--1.

    ERIC Educational Resources Information Center

    Coole, Walter A.; Reitan, Henry M.

    This catalog is intended to be issued periodically as a means of extending and updating teaching materials which have been previously published through ERIC by these authors. The materials include the Alpha and Gamma levels of the "Greenbook System," pre-professional and entry in-service professional levels of an integrated sequence of five…

  20. Catalog of Viking mission data

    NASA Technical Reports Server (NTRS)

    Vostreys, R. W. (Editor)

    1978-01-01

    This catalog announces the present/expected availability of scientific data acquired by the Viking missions and contains descriptions of the Viking spacecraft, experiments, and data sets. An index is included listing the team leaders and team members for the experiments. Information on NSSDC facilities and ordering procedures, and a list of acronyms and abbreviations are included in the appendices.

  1. Technology and the Online Catalog.

    ERIC Educational Resources Information Center

    Graham, Peter S.

    1983-01-01

    Discusses trends in computer technology and their use for library catalogs, noting the concept of bandwidth (describes quantity of information transmitted per given unit of time); computer hardware differences (micros, minis, maxis); distributed processing systems and databases; optical disk storage; networks; transmission media; and terminals.…

  2. Viking orbiter stereo imaging catalog

    NASA Technical Reports Server (NTRS)

    Blasius, K. R.; Vertrone, A. V.; Lewis, B. H.; Martin, M. D.

    1982-01-01

    The extremely long mission of the two Viking Orbiter spacecraft produced a wealth of photos of surface features. Many of these photos can be used to form stereo images allowing the student of Mars to examine a subject in three dimensional. This catalog is a technical guide to the use of stereo coverage within the complex Viking imaging data set.

  3. Audio-Visual Materials Catalog.

    ERIC Educational Resources Information Center

    Anderson (M.D.) Hospital and Tumor Inst., Houston, TX.

    This catalog lists 27 audiovisual programs produced by the Department of Medical Communications of the University of Texas M. D. Anderson Hospital and Tumor Institute for public distribution. Video tapes, 16 mm. motion pictures and slide/audio series are presented dealing mostly with cancer and related subjects. The programs are intended for…

  4. Catalog of Educational Multimedia Products.

    ERIC Educational Resources Information Center

    National Technical Information Service (DOC), Springfield, VA.

    This catalog lists 276 audiovisual educational materials for sale through the National Technical Information Service. Materials are arranged by subject category: Administration; Black and Women's Studies--Biography, In the Military, and History & Culture; Counseling--Career Counseling; Drug Prevention; Health & Safety; History--Early & American…

  5. Choices in Cataloging Electronic Journals

    ERIC Educational Resources Information Center

    Leathem, Cecilia A.

    2005-01-01

    Libraries and catalogers face choices in the treatment of the growing collections of electronic journals. Policies issued by CONSER and the Library of Congress allow libraries to edit existing print records to accommodate information pertaining to the electronic versions (single record option) or to create new records for them. The discussion…

  6. Online Catalogs: Issues and Concerns.

    ERIC Educational Resources Information Center

    Bausser, Jaye

    This document explores the various issues and concerns related to the development of online systems in libraries and, in particular, online catalogs. Following a preface, foreword, and introduction, chapters are devoted to each of the following topics: (l) providing for special interests including the disabled; (2) authority control; (3) subject…

  7. Biomass Stoves and Lens Opacity and Cataract in Nepalese Women

    PubMed Central

    Pokhrel, Amod K.; Bates, Michael N.; Shrestha, Sachet P.; Bailey, Ian L.; DiMartino, Robert B.; Smith, Kirk R.; Joshi, N. D.

    2014-01-01

    Purpose Cataract is the most prevalent cause of blindness in Nepal. Several epidemiologic studies have associated cataracts with use of biomass cookstoves. These studies, however, have had limitations, including potential control selection bias and limited adjustment for possible confounding. This study, in Pokhara city, in an area of Nepal where biomass cookstoves are widely used without direct venting of the smoke to the outdoors, focuses on pre-clinical measures of opacity, while avoiding selection bias and taking into account comprehensive data on potential confounding factors Methods Using a cross-sectional study design, severity of lenticular damage, judged on the LOCS III scales, was investigated in females (n=143), aged 20-65 years, without previously diagnosed cataract. Linear and logistic regression analyses were used to examine the relationships with stove type and length of use. Clinically significant cataract, used in the logistic regression models, was defined as a LOCS III score > 2. Results Using gas cookstoves as the reference group, logistic regression analysis for nuclear cataract showed the evidence of relationships with stove type: for biomass stoves, the odds ratio (OR) was 2.58 (95% confidence interval [CI]: 1.22-5.46) and, for kerosene stoves, the OR was 5.18 (95% CI: 0.88-30.38). Similar results were found for nuclear color (LOCS III score > 2), but no association was found with cortical cataracts. Supporting a relationship between biomass stoves and nuclear cataract was a trend with years of exposure to biomass cookstoves (p=0.01). Linear regression analyses did not show clear evidence of an association between lenticular damage and stove types. Biomass fuel used for heating was not associated with any form of opacity. Conclusions This study provides support for associations of biomass and kerosene cookstoves with nuclear opacity and change in nuclear color. The novel associations with kerosene cookstove use deserve further investigation

  8. MICROBASE: An integrated paleontological database and image cataloging system

    SciTech Connect

    Becker, R.C. ); Goodman, D.K. ); Couvering, J.V. ); Ford, L.N. Jr. ); Albert, N.R. )

    1991-08-01

    MICROBASE (MICROpaleontology dataBASE) is an integrated database and image retrieval system designed to increase the efficiency with which paleontologists access paleontological and biostratigraphic data. The project is funded by a consortium of oil companies and coordinated by the American Association of Stratigraphic Palynologists. MICROBASE is a PC-based MS DOS-compatible system operating under Microsoft Windows 3.0 that takes advantage of the latest developments in both analog (video) and digital technology. Images are captured using a video camera mounted on a microscope, or with high-resolution scanner for photographic source material. The image is saved either as digital file or as an analog frame on a Panasonic optical disk recorded (OMDR). The OMDR can store 108,000 images on the 12-in. disk with a retrieval and display time of less than 0.7 s. Microfossil data (nomenclature, synonymy, descriptions, stratigraphic distribution etc.) are stored as relational tables in an ORACLE DBMS (PALeontological CATalog, or PALCAT). These textural data are linked to multiple images for each taxon. MICROBASE is the first integrated and widely-supported system to electronically archive paleontological data, regardless of fossil group. It provides rapid, easy to access to paleontological data, resulting in standardized taxonomy, more efficient identification procedures, substantially reduced learning curves for persons unfamiliar with particular groups, and more effective retention of the cumulative expertise of experienced paleontologists. The Ellis and Messina Catalog of Foraminifera is the first paleontological catalog available on the MICROBASE system.

  9. Subject Access in the Small Library.

    ERIC Educational Resources Information Center

    Turock, Betty J.; Shelton, Hildred C.

    This pilot study on the subject access problems of patrons of small to medium size libraries was designed to measure the extent to which users' vocabularies matched the search vocabulary of bibliographic records in the card catalog, and to enhance subject access by develooping a microcomputer system which integrated Library of Congress Subject…

  10. Model of opacity and emissivity of non-equilibrium plasma

    NASA Astrophysics Data System (ADS)

    Politov, V. Y.

    2008-05-01

    In this work the model describing absorption and emission properties of the non-equilibrium plasma is presented. It is based on the kinetics equations for populations of the ground, singly and doubly excited states of multi-charged ions. After solving these equations, the states populations together with the spectroscopic data, supplied in the special database for a lot ionization stages, are used for building the spectral distributions of plasma opacity and emissivity in STA approximation. Results of kinetics simulation are performed for such important X-ray converter as gold, which is investigated intensively in ICF-experiments.

  11. Validating solar and solar-like star opacities

    NASA Astrophysics Data System (ADS)

    Le Pennec, Maëlle; TURCK-CHIEZE, Sylvaine; RIBEYRE, Xavier; DUCRET, Jean-Eric; BLANCARD, Christophe; COSSE, Philippe; MONDET, Guillaume; FAUSSURIER, Gérald

    2015-08-01

    The Sun is, as being our closest star, a privilege place to test and validate physics. However, the solar physics is not yet completely understood. Indeed, since the recent update of the solar composition, there are differences between solar models and seismic data, visible on the solar sound speed profile comparison. This well established large discrepancy (Turck-Chièze et al. 2001, 2004, 2011, Christensen-Dalsgaard et al. 2009, Basu et al. 2015) could be linked to radiative transfer issue.Two directions of investigation are proposed. One possibility to explain this gap could be that the Sun produces slightly more energy that it liberates on its surface (around 5%). This energy could be transformed into macroscopic motions in the radiative zone, which are not taken into account in the solar standard model. Another explanation could be that the calculations of energy transport are not correctly taken into account either on the calculation of the Rosseland mean values or in the treatment of the radiative acceleration. This could have an impact on the determination of the internal solar abundances.Unfortunately, there are very few experiments to validate these calculations (Bailey et al. 2014). That's why we are proposing an opacity experiment on a high-energy laser like LMJ, in the conditions of the radiative zone (T=[2 - 15.106 K] and ρ=[0.2 - 150 g/cm3]). The aim is to measure the opacity of the most important contributors to the global opacity in this solar area : iron, oxygen and silicon. We are exploiting in that purpose a technical approach called the Double Ablation Front. During the laser-plasma interaction, the plasma radiative effects allow to reach these high temperatures and densities at LTE and validate or not plasma effects and line widths. We will show the principle of this technique and the results of our simulations on several elements.In the mean time, we are also exploiting new opacity calculations thanks to the OPAS code (Blancard et al. 2012

  12. DISPERSION ANALYSIS OF RADIATION/THERMAL FRONTS WITH FULL RESOLVED SPECTRAL OPACITY VARIATION.

    SciTech Connect

    L. AUER; R. LOWRIE

    2000-12-01

    The radiation transport and linearized thermal energy equations have been analyzed to find the temporal dependence of the component modes in a radiation/thermal front. The fully resolved spectral variation of the opacity as a function of energy, as well as the exact time and angular dependence, is treated in this work. As we are able to study arbitrarily complicated opacity spectra, we stress the importance of the new results as a check on the effect of using opacity averages.

  13. The Chandra Fornax Survey. II. The Source Catalog

    NASA Astrophysics Data System (ADS)

    Williamson, Karen; Zurek, D.; Scharf, C.

    2010-01-01

    The Fornax cluster of galaxies lies in the southern hemisphere and is second only to the richer and more well-studied Virgo cluster in its accessibility for high resolution multi-wavelength data collection. A deep \\emph{Chandra} survey of the inner one degree of this cluster was performed in 2003, with first results published in 2005 identifying 771 X-ray point sources. We present a catalog of these X-ray point sources. Possible and likely optical candidates were identified from ground-based, HST and GALEX images. This catalog will facilitate future investigations by enhancing our understanding of a cluster's fainter and smaller objects, calibrating distance rulers, and constraining cosmological models. This work was conducted by a Research Experience for Undergraduates (REU) position at the American Museum of Natural History and funded by the NSF.

  14. The interconnected data directory system and Catalog Interoperability

    NASA Technical Reports Server (NTRS)

    Thieman, James R.

    1991-01-01

    The Catalog Interoperability (CI) project, designed to enable rapid and efficient identification, location, and access to data of interest to the science community, is considered. The CI goal is to create a worldwide data information network composed of interconnected directory, guide (catalog), and inventory systems. Directories were created to aid in finding data. The directories contain brief information about the data sets, sufficient for determining whether further investigation is warranted. They also provide automated links to other information systems which give more detail on data of interest. A common format for describing data sets has been developed, called the Directory Interchange Format (DIF), which is used as the basis of information to be shared among the directories. These DIF files can be passed among the directories to keep their information up to date.

  15. The effects of TiO opacity on the atmospheric structure of cool stars

    NASA Technical Reports Server (NTRS)

    Krupp, B. M.; Collins, J. G.; Johnson, H. R.

    1978-01-01

    A quantitative investigation is conducted concerning the effect of TiO opacities on the atmospheric temperature structure in late-type stars. Model atmospheres are computed, taking into account opacity-sampling (OS) or straight-mean (SM) opacities for three singlet and three triplet band systems of TiO. Model atmospheres using OS and SM opacities for TiO are compared with models having no TiO, giving attention to the effects of TiO opacities on the temperature structures of various atmospheres and the usefulness of straight-mean TiO opacities in model atmosphere calculations. The results of the model-atmosphere calculations are presented in two graphs. TiO opacities produce a global atmospheric heating which may reach several hundred kelvins. It is shown quantitatively that the TiO molecule is an important source of atmospheric opacity in cool stars of solar composition. The relative importance of TiO opacities to the thermal structure of a stellar atmosphere is influenced in the outer layers by CO and H2O cooling effects and in the deeper layers by CO, CN, and metal line absorption.

  16. Additional atmospheric opacity measurements at lambda = 1.1 mm from Mauna Kea Observatory, Hawaii

    NASA Technical Reports Server (NTRS)

    Parrish, A.; De Zafra, R. L.; Barrett, J. W.; Solomon, P.; Connor, B.

    1987-01-01

    Atmospheric opacity values in the zenith direction are given for a wavelength of 1.1 mm (278 GHz) at the summit of Mauna Kea in the Hawaiian Islands. A total of 75 days is covered during the period 1983-1986. Observations were made on a quasi-continuous basis, with opacity measured every 20 minutes around the clock for significant periods of time. A conversion from opacity at lambda = 1.1 mm to the equivalent precipitable water vapor column is given from the measurements of Zammit and Ade (1981), from which opacities at other wavelengths may be derived.

  17. Detailed Opacity Comparison for an Improved Stellar Modeling of the Envelopes of Massive Stars

    NASA Astrophysics Data System (ADS)

    Turck-Chièze, S.; Le Pennec, M.; Ducret, J. E.; Colgan, J.; Kilcrease, D. P.; Fontes, C. J.; Magee, N.; Gilleron, F.; Pain, J. C.

    2016-06-01

    Seismic observations have led to doubts or ambiguities concerning the opacity calculations used in stellar physics. Here, we concentrate on the iron-group opacity peak, due to iron, nickel, and chromium, located around T = 200,000 K for densities from {10}-8 {to} {10}-4 {{g}} {{cm}}-3, which creates some convective layers in stellar radiative envelopes for masses between 3 and 18 {M}ȯ . These conditions were extensively studied in the 1980s. More recently, inconsistencies between OP and OPAL opacity calculations have complicated the interpretation of seismic observations as the iron-group opacity peak excites acoustic and gravity modes in SPB, β Cephei, and sdB stars. We investigate the reliability of the theoretical opacity calculations using the modern opacity codes ATOMIC and SCO-RCG. We show their temperature and density dependence for conditions that are achievable in the laboratory and equivalent to astrophysical conditions. We also compare new theoretical opacity spectra with OP spectra and quantify how different approximations impact the Rosseland mean calculations.This detailed study estimates new ATOMIC and SCO-RCG Rosseland mean values for astrophysical conditions which we compare to OP values. Some puzzling questions are still under investigation for iron, but we find a strong increase in the Rosseland mean nickel opacity of a factor between 2 and 6 compared to OP. This appears to be due to the use of extrapolated atomic data for the Ni opacity within the OP calculations. A study on chromium is also shown.

  18. Wider pulsation instability regions for β Cephei and SPB stars calculated using new Los Alamos opacities

    DOE PAGESBeta

    Walczak, Przemysław; Fontes, Christopher John; Colgan, James Patrick; Kilcrease, David Parker; Guzik, Joyce Ann

    2015-08-13

    Here, our goal is to test the newly developed OPLIB opacity tables from Los Alamos National Laboratory and check their influence on the pulsation properties of B-type stars. We calculated models using MESA and Dziembowski codes for stellar evolution and linear, nonadiabatic pulsations, respectively. We derived the instability domains of β Cephei and SPB-types for different opacity tables OPLIB, OP, and OPAL. As a result, the new OPLIB opacities have the highest Rosseland mean opacity coefficient near the so-called Z-bump. Therefore, the OPLIB instability domains are wider than in the case of OP and OPAL data.

  19. Mars dust and cloud opacities and scattering properties

    NASA Technical Reports Server (NTRS)

    Clancy, R. T.; Lee, S. W.

    1992-01-01

    We have recently completed an analysis of the visible emission-phase function (EPF) sequences obtained with the solar-band channel of the Infrared Thermal Mapping (IRTM) instrument onboard the two Viking Orbiters. Roughly 100 of these EPF sequences were gathered during the 1977-1980 period, in which the total broadband (.3-3.0 microns) reflectances of the atmosphere/surface above specific locations on Mars were measured versus emission angle as the spacecraft passed overhead. A multiple scattering radiative transfer program was employed to model the EPF observations in terms of the optical depths of dust/clouds, their single scattering albedos and phase functions, and the Lambert albedos and phase coefficient of the underlying surfaces. Due to the predominance of atmospheric scattering at large atmospheric pathlengths and/or large dust opacities, we were able to obtain strong constraints on the scattering properties of dust/clouds and their opacities for a wide range of latitudes, longitudes, and seasons on Mars.

  20. Mars dust and cloud opacities and scattering properties

    NASA Astrophysics Data System (ADS)

    Clancy, R. T.; Lee, S. W.

    1992-09-01

    We have recently completed an analysis of the visible emission-phase function (EPF) sequences obtained with the solar-band channel of the Infrared Thermal Mapping (IRTM) instrument onboard the two Viking Orbiters. Roughly 100 of these EPF sequences were gathered during the 1977-1980 period, in which the total broadband (.3-3.0 microns) reflectances of the atmosphere/surface above specific locations on Mars were measured versus emission angle as the spacecraft passed overhead. A multiple scattering radiative transfer program was employed to model the EPF observations in terms of the optical depths of dust/clouds, their single scattering albedos and phase functions, and the Lambert albedos and phase coefficient of the underlying surfaces. Due to the predominance of atmospheric scattering at large atmospheric pathlengths and/or large dust opacities, we were able to obtain strong constraints on the scattering properties of dust/clouds and their opacities for a wide range of latitudes, longitudes, and seasons on Mars.

  1. Optical Properties of Aerosols and Clouds: The Software Package OPAC.

    NASA Astrophysics Data System (ADS)

    Hess, M.; Koepke, P.; Schult, I.

    1998-05-01

    The software package OPAC (Optical Properties of Aerosols and Clouds) is described. It easily provides optical properties in the solar and terrestrial spectral range of atmospheric particulate matter. Microphysical and optical properties of six water clouds, three ice clouds, and 10 aerosol components, which are considered as typical cases, are stored as ASCII files. The optical properties are the extinction, scattering, and absorption coefficients, the single scattering albedo, the asymmetry parameter, and the phase function. They are calculated on the basis of the microphysical data (size distribution and spectral refractive index) under the assumption of spherical particles in case of aerosols and cloud droplets and assuming hexagonal columns in case of cirrus clouds. Data are given for up to 61 wavelengths between 0.25 and 40 m and up to eight values of the relative humidity. The software package also allows calculation of derived optical properties like mass extinction coefficients and Ångström coefficients.Real aerosol in the atmosphere always is a mixture of different components. Thus, in OPAC it is made possible to get optical properties of any mixtures of the basic components and to calculate optical depths on the base of exponential aerosol height profiles. Typical mixtures of aerosol components as well as typical height profiles are proposed as default values, but mixtures and profiles for the description of individual cases may also be achieved simply.

  2. Light element opacities of astrophysical interest from ATOMIC

    SciTech Connect

    Colgan, J.; Kilcrease, D. P.; Magee, N. H. Jr.; Armstrong, G. S. J.; Abdallah, J. Jr.; Sherrill, M. E.; Fontes, C. J.; Zhang, H. L.; Hakel, P.

    2013-07-11

    We present new calculations of local-thermodynamic-equilibrium (LTE) light element opacities from the Los Alamos ATOMIC code for systems of astrophysical interest. ATOMIC is a multi-purpose code that can generate LTE or non-LTE quantities of interest at various levels of approximation. Our calculations, which include fine-structure detail, represent a systematic improvement over previous Los Alamos opacity calculations using the LEDCOP legacy code. The ATOMIC code uses ab-initio atomic structure data computed from the CATS code, which is based on Cowan's atomic structure codes, and photoionization cross section data computed from the Los Alamos ionization code GIPPER. ATOMIC also incorporates a new equation-of-state (EOS) model based on the chemical picture. ATOMIC incorporates some physics packages from LEDCOP and also includes additional physical processes, such as improved free-free cross sections and additional scattering mechanisms. Our new calculations are made for elements of astrophysical interest and for a wide range of temperatures and densities.

  3. Variable Stars from the MG-1 Catalog

    NASA Astrophysics Data System (ADS)

    Flurchick, K. M.; Griego, Ben; Culver, Roger B.

    2014-06-01

    This work describes the recent efforts at North Carolina A&T(NCAT) mining the MG catalogs for variable stars. NCAT is a node in both the GNAT network and the SKYNET collaboration which forms the basis of the collaboration including access to instruments. The initial data analysis to obtain the light curves (LC) for MG-1 has been performed and a number of candidate variable stars have been identified including brown dwarf stars, eclipsing binaries and long period variable stars.Many of the identified candidate variable stars are now the subject of coordinated multi-site follow-on observations to elucidate the details of the variability. The coordinated observing includes researchers in Australia, Arizona, Colorado and North Carolina. As a node in both the GNAT network and the SKYNET collaboration NCAT has access to a number of instruments. Much of the observational work is performed using the SKYNET node in Chile.For the North Carolina work reported here, the observational work and initial LC generation is performed using telescopes and applications from the SKYNET program. In this work the instrumentation, the LC analysis and status of the coordinated follow-on observations arepresented.

  4. Catalog of databases and reports

    SciTech Connect

    Burtis, M.D.

    1997-04-01

    This catalog provides information about the many reports and materials made available by the US Department of Energy`s (DOE`s) Global Change Research Program (GCRP) and the Carbon Dioxide Information Analysis Center (CDIAC). The catalog is divided into nine sections plus the author and title indexes: Section A--US Department of Energy Global Change Research Program Research Plans and Summaries; Section B--US Department of Energy Global Change Research Program Technical Reports; Section C--US Department of Energy Atmospheric Radiation Measurement (ARM) Program Reports; Section D--Other US Department of Energy Reports; Section E--CDIAC Reports; Section F--CDIAC Numeric Data and Computer Model Distribution; Section G--Other Databases Distributed by CDIAC; Section H--US Department of Agriculture Reports on Response of Vegetation to Carbon Dioxide; and Section I--Other Publications.

  5. EPRI DATATRAN data bank catalog

    SciTech Connect

    Cordes, G.A.

    1986-01-01

    The Electric Power Research Institute (EPRI) has established a data bank for the nuclear utilities using the DATATRAN computer code executive and data base management system. This rapidly expanding data bank contains data bases archiving data from nuclear industry experimental test programs and nuclear plant transient events. The report catalogs the data bases of the EPRI DATARAN data bank and the associated DATATRAN modules. 51 figs., 103 tabs.

  6. NASA SBIR product catalog, 1991

    NASA Technical Reports Server (NTRS)

    1991-01-01

    This catalog is a partial list of products of NASA SBIR (Small Business Innovation Research) projects that have advanced to some degree into Phase 3. While most of the products evolved from work conducted during SBIR Phase 1 and 2, a few advanced to commercial status solely from Phase 1 activities. The catalog presents information provided to NASA by SBIR contractors who wished to have their products exhibited at Technology 2001, a NASA-sponsored technology transfer conference held in San Jose, California, on December 4, 5, and 6, 1991. The catalog presents the product information in the following technology areas: computer and communication systems; information processing and AI; robotics and automation; signal and image processing; microelectronics; electronic devices and equipment; microwave electronic devices; optical devices and lasers; advanced materials; materials processing; materials testing and NDE; materials instrumentation; aerodynamics and aircraft; fluid mechanics and measurement; heat transfer devices; refrigeration and cryogenics; energy conversion devices; oceanographic instruments; atmosphere monitoring devices; water management; life science instruments; and spacecraft electromechanical systems.

  7. The NASA SBIR product catalog

    NASA Technical Reports Server (NTRS)

    Gilman, J. A.; Paige, J. B.; Schwenk, F. Carl

    1992-01-01

    The purpose of this catalog is to assist small business firms in making the community aware of products emerging from their efforts in the Small Business Innovation Research (SBIR) program. It contains descriptions of some products that have advanced into Phase 3 and others that are identified as prospective products. Both lists of products in this catalog are based on information supplied by NASA SBIR contractors in responding to an invitation to be represented in this document. Generally, all products suggested by the small firms were included in order to meet the goals of information exchange for SBIR results. Of the 444 SBIR contractors NASA queried, 137 provided information on 219 products. The catalog presents the product information in the technology areas listed in the table of contents. Within each area, the products are listed in alphabetical order by product name and are given identifying numbers. Also included is an alphabetical listing of the companies that have products described. This listing cross-references the product list and provides information on the business activity of each firm. In addition, there are three indexes: one a list of firms by states, one that lists the products according to NASA Centers that managed the SBIR projects, and one that lists the products by the relevant Technical Topics utilized in NASA's annual program solicitation under which each SBIR project was selected.

  8. Opacity Build-up in Impulsive Relativistic Sources

    SciTech Connect

    Granot, Jonathan; Cohen-Tanugi, Johann; Silva, Eduardo do Couto e

    2007-09-28

    Opacity effects in relativistic sources of high-energy gamma-rays, such as gamma-ray bursts (GRBs) or Blazars, can probe the Lorentz factor of the outflow as well as the distance of the emission site from the source, and thus help constrain the composition of the outflow (protons, pairs, magnetic field) and the emission mechanism. Most previous works consider the opacity in steady state. Here we study the effects of the time dependence of the opacity to pair production ({gamma}{gamma} {yields} e{sup +}e{sup -}) in an impulsive relativistic source, which may be relevant for the prompt gamma-ray emission in GRBs or flares in Blazars. We present a simple, yet rich, semi-analytic model for the time and energy dependence of the optical depth, {tau}{gamma}{gamma}, in which a thin spherical shell expands ultra-relativistically and emits isotropically in its own rest frame over a finite range of radii, R{sub 0} {le} R {le} R{sub 0}+{Delta}R. This is particularly relevant for GRB internal shocks. We find that in an impulsive source ({Delta}R {approx}< R{sub 0}), while the instantaneous spectrum (which is typically hard to measure due to poor photon statistics) has an exponential cutoff above the photon energy {var_epsilon}1(T) where t{gamma}{gamma}({var_epsilon}1) = 1, the time integrated spectrum (which is easier to measure) has a power-law high-energy tail above the photon energy {var_epsilon}1* {approx} {var_epsilon}1({Delta}T) where {Delta}T is the duration of the emission episode. Furthermore, photons with energies {var_epsilon} > {var_epsilon}1* are expected to arrive mainly near the onset of the spike in the light curve or flare, which corresponds to the short emission episode. This arises since in such impulsive sources it takes time to build-up the (target) photon field, and thus the optical depth {tau}{gamma}{gamma}({var_epsilon}) initially increases with time and {var_epsilon}1(T) correspondingly decreases with time, so that photons of energy {var_epsilon} > {var

  9. Far infrared supplement: Catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Gezari, D. Y.; Schmitz, M.; Mead, J. M.

    1984-01-01

    The Far Infrared Supplement: catalog of infrared observations summarizes all infrared astronomical observations at far infrared wavelengths published in the scientific literature between 1965 and 1982. The Supplement list contains 25% of the observations in the full catalog of infrared observations (C10), and essentially eliminates most visible stars from the listings. The Supplement is more compact than the main Catalog (it does not contain the bibliography and position index of the C10), and is intended for easy reference during astronomical observations.

  10. Subject Description of BOOKS: A Manual of Procedures for Augmenting Subject Descriptions in Library Catalogs. Research Study No. 3.

    ERIC Educational Resources Information Center

    Settel, Barbara, Ed.

    Term selection methodology used in the Subject Access Project is outlined in this manual. This project was designed to demonstrate how a card catalog in machine-readable form can be augmented to allow greater subject access to the information content of a library collection. Rules and regulations for selecting words from indexes and contents pages…

  11. PREDICTION OF THE OPACITY OF DETACHED PLUMES FORMED BY CONDENSATION OF VAPORS

    EPA Science Inventory

    The paper presents a mathematical model of the condensation processes occurring in a smoke plume from a combustion process. In such a plume, the opacity may increase where the hot stack gas mixes with cooler atmosphere. The increased opacity is due to aerosol formation which may ...

  12. Fac-Back-OPAC: An Open Source Interface to Your Library System

    ERIC Educational Resources Information Center

    Beccaria, Mike; Scott, Dan

    2007-01-01

    The new Fac-Back-OPAC (a faceted backup OPAC) is built on code that was originally developed by Casey Durfee in February 2007. It represents the convergence of two prominent trends in library tools: the decoupling of discovery tools from the traditional integrated library system (ILS) and the use of readily available open source components to…

  13. Online vegetation opacity parameter estimation over Little Washita watershed using AMSR-E passive microwave observations

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The vegetation opacity parameter is a key input needed to map surface soil moisture and other landsurface properties to brightness temperature. An integrated approach to estimating vegetation and soil moisture may provide a better soil moisture estimate than relying on opacity estimates from visible...

  14. Digital Optical Method to quantify the visual opacity of fugitive plumes

    NASA Astrophysics Data System (ADS)

    Du, Ke; Shi, Peng; Rood, Mark J.; Wang, Kai; Wang, Yang; Varma, Ravi M.

    2013-10-01

    Fugitive emissions of particulate matter (PM) raise public concerns due to their adverse impacts on human health and atmospheric visibility. Although the United States Environmental Protection Agency (USEPA) has not developed a standard method for quantifying the opacities of fugitive plumes, select states have developed human vision-based opacity methods for such applications. A digital photographic method, Digital Optical Method for fugitive plumes (DOMfugitive), is described herein for quantifying the opacities of fugitive plume emissions. Field campaigns were completed to evaluate this method by driving vehicles on unpaved roads to generate dust plumes. DOMfugitive was validated by performing simultaneous measurements using a co-located laser transmissometer. For 84% of the measurements, the individual absolute opacity difference values between the two methods were ≤15%. The average absolute opacity difference for all the measurements was 8.5%. The paired t-test showed no significant difference between the two methods at 99% confidence level. Comparisons of wavelength dependent opacities with grayscale opacities indicated that DOMfugitive was not sensitive to the wavelength in the visible spectrum evaluated during these field campaigns. These results encourage the development of a USEPA standard method for quantifying the opacities of fugitive PM plumes using digital photography, as an alternative to human-vision based approaches.

  15. TI-59 PROGRAMMABLE CALCULATOR PROGRAMS FOR IN-STACK OPACITY, VENTURI SCRUBBERS, AND ELECTROSTATIC PRECIPITATORS

    EPA Science Inventory

    The report explains the basic concepts of in-stack opacity as measured by in-stack opacity monitors. Also included are calculator programs that model the performance of venturi scrubbers and electrostatic precipitators. The effect of particulate control devices on in-stack opacit...

  16. Microcomputers and the Online Catalog: Changing How the Catalog Is Used.

    ERIC Educational Resources Information Center

    Fayen, Emily Gallup

    The use of microcomputers with online catalogs is a partnership that is gaining wide acceptance and leading to dramatic changes in how we think about online catalogs. There are two major ways in which microcomputers are used in an online catalog system: (1) the microcomputer provides all the computer support for the entire system, i.e., the…

  17. Galactic cold cores. VI. Dust opacity spectral index

    NASA Astrophysics Data System (ADS)

    Juvela, M.; Demyk, K.; Doi, Y.; Hughes, A.; Lefèvre, C.; Marshall, D. J.; Meny, C.; Montillaud, J.; Pagani, L.; Paradis, D.; Ristorcelli, I.; Malinen, J.; Montier, L. A.; Paladini, R.; Pelkonen, V.-M.; Rivera-Ingraham, A.

    2015-12-01

    Context. The Galactic Cold Cores project has carried out Herschel photometric observations of 116 fields where the Planck survey has found signs of cold dust emission. The fields contain sources in different environments and different phases of star formation. Previous studies have revealed variations in their dust submillimetre opacity. Aims: The aim is to measure the value of dust opacity spectral index and to understand its variations spatially and with respect to other parameters, such as temperature, column density, and Galactic location. Methods: The dust opacity spectral index β and the dust colour temperature T are derived using Herschel and Planck data. The relation between β and T is examined for the whole sample and inside individual fields. Results: Based on IRAS and Planck data, the fields are characterised by a median colour temperature of 16.1 K and a median opacity spectral index of β = 1.84. The values are not correlated with Galactic longitude. We observe a clear T-β anti-correlation. In Herschel observations, constrained at lower resolution by Planck data, the variations follow the column density structure and βFIR can rise to ~2.2 in individual clumps. The highest values are found in starless clumps. The Planck 217 GHz band shows a systematic excess that is not restricted to cold clumps and is thus consistent with a general flattening of the dust emission spectrum at millimetre wavelengths. When fitted separately below and above 700 μm, the median spectral index values are βFIR ~ 1.91 and β(mm) ~ 1.66. Conclusions: The spectral index changes as a function of column density and wavelength. The comparison of different data sets and the examination of possible error sources show that our results are robust. However, β variations are partly masked by temperature gradients and the changes in the intrinsic grain properties may be even greater. Planck http://www.esa.int/Planck is a project of the European Space Agency - ESA - with instruments

  18. Proton opacity in the light of LHC diffractive data

    NASA Astrophysics Data System (ADS)

    Ryskin, M. G.; Martin, A. D.; Khoze, V. A.

    2012-04-01

    We show that collider data on elastic pp (and pbar{p}) scattering, including the LHC TOTEM data at 7 TeV, can be well described by a 3-channel eikonal model with only one Pomeron, with parameters that are naturally linked to the perturbative QCD (BFKL) framework. The proton opacity, determined in this way, is then used to account for sizeable absorptive effects. We study the recent measurements of dσ/ dΔ η made by the ATLAS collaboration, where they select events with large rapidity gaps Δ η. We demonstrate that the absorptive corrections noticeably change both the value and the Δ η dependence of the cross section. We find that our parameter-free calculation is in agreement with these ATLAS data.

  19. Weapon container catalog. Volumes 1 & 2

    SciTech Connect

    Brown, L.A.; Higuera, M.C.

    1998-02-01

    The Weapon Container Catalog describes H-gear (shipping and storage containers, bomb hand trucks and the ancillary equipment required for loading) used for weapon programs and for special use containers. When completed, the catalog will contain five volumes. Volume 1 for enduring stockpile programs (B53, B61, B83, W62, W76, W78, W80, W84, W87, and W88) and Volume 2, Special Use Containers, are being released. The catalog is intended as a source of information for weapon program engineers and also provides historical information. The catalog also will be published on the SNL Internal Web and will undergo periodic updates.

  20. Cataloging, Processing, Administering AV Materials. A Model for Wisconsin Schools. Revised, 1974.

    ERIC Educational Resources Information Center

    Little, Robert David, Ed.; And Others

    The Wisconsin Association of School Librarians has produced a manual for standardized processing of all nonprint media, based on two principles: (1) the media should be centralized, organized, and administered for maximum access; and (2) content is more important than form. Definitions, cataloging, processing, housing, circulation, and care are…

  1. Determining the Required Number of Online Catalog Terminals: A Research Study.

    ERIC Educational Resources Information Center

    Tolle, John E.; And Others

    1983-01-01

    Discusses a study conducted at Ohio State University Libraries to develop and test a model that accurately estimates number of terminals required in an online public access catalog system. Data collection, research methodology, standard statistical distributions, and queuing models are noted. Four references are cited. (EJS)

  2. Science Fare: An Illustrated Guide and Catalog of Toys, Books, and Activities for Kids.

    ERIC Educational Resources Information Center

    Saul, Wendy; Newman, Alan R.

    This book addresses some of the methods by which science can be made accessible to children, both in school and non-school settings. It contains information on effective science education for elementary school age children, and includes a catalog of books and other materials. Topics discussed in the book include: (1) planning; (2) approaches to…

  3. Selection and Cataloging of Adult Pornography Web Sites for Academic Libraries

    ERIC Educational Resources Information Center

    Dilevko, Juris; Gottlieb, Lisa

    2004-01-01

    Pornography has become part of mainstream culture. As such, it has become a subject of academic research, and this, in turn, has implications for university libraries. Focusing on adult Internet pornography, this study suggests that academic libraries should provide access to adult pornographic Web sites by including them in their online catalogs.

  4. Crisis in Cataloging Revisited: The Year's Work in Subject Analysis, 1990.

    ERIC Educational Resources Information Center

    Young, James Bradford

    1991-01-01

    Reviews the 1990 literature that concerns subject analysis. Issues addressed include subject cataloging, including Library of Congress Subject Headings (LCSH); classification, including Dewey Decimal Classification (DDC), Library of Congress Classification, and classification in online systems; subject access, including the online use of…

  5. A Comparative Evaluation of the Technical Performance and User Acceptance of Two Prototype Online Catalog Systems.

    ERIC Educational Resources Information Center

    Siegel, Elliot R.; And Others

    1984-01-01

    Describes research strategy and methods of comparative evaluation conducted by the National Library of Medicine to assess user acceptance and technical performance of two prototype patron accessible online catalog systems within same operational environment. User acceptance studies included sample search experiment, comparison search experiment,…

  6. Adopting AACR 2: The Case for Not Closing the Catalog.

    ERIC Educational Resources Information Center

    Hewitt, Joe A.; Gleim, David E.

    1979-01-01

    Discusses closing card catalogs in research libraries in terms of feasibility and cost effectiveness and argues for continuing the catalog. Techniques for integrating the new headings into existing card catalogs, and the advantages of delaying the switchover are discussed. (MBR)

  7. Opacity Measurement and Theoretical Investigation of Hot Silicon Plasma

    NASA Astrophysics Data System (ADS)

    Xiong, Gang; Yang, Jiamin; Zhang, Jiyan; Hu, Zhimin; Zhao, Yang; Qing, Bo; Yang, Guohong; Wei, Minxi; Yi, Rongqing; Song, Tianming; Li, Hang; Yuan, Zheng; Lv, Min; Meng, Xujun; Xu, Yan; Wu, Zeqing; Yan, Jun

    2016-01-01

    We report on opacity measurements of a silicon (Si) plasma at a temperature of (72 ± 5) eV and a density of (6.0 ± 1.2) mg cm-3 in the photon energy range of 1790-1880 eV. A 23 μg cm-2 Si foil tamped by 50 μg cm-2 CH layers on each side was heated to a hot-dense plasma state by X-ray radiation emitted from a D-shaped gold cavity that was irradiated by intense lasers. Absorption lines of 1s - 2p transitions of Si xiii to Si ix ions have been measured using point-projection spectroscopy. The transmission spectrum of the silicon plasma was determined by comparing the light passing through the plasma to the light from the same shot passing by the plasma. The density of the Si plasma was determined experimentally by side-on radiography and the temperature was estimated from the radiation flux data. Radiative hydrodynamic simulations were performed to obtain the temporal evolutions of the density and temperature of the Si plasma. The experimentally obtained transmission spectra of the Si sample plasma have been reproduced using a detailed term account model with the local thermodynamic equilibrium approximation. The energy levels, oscillator strengths and photoionization cross-sections used in the calculation were generated by the flexible atomic code. The experimental transmission spectrum was compared with the theoretical calculation and good agreement was found. The present experimental spectrum and theoretical calculation were also compared with the new opacities available in the Los Alamos OPLIB database.

  8. Photoionized Plasma and Opacity Experiments on the Z Machine

    NASA Astrophysics Data System (ADS)

    Bailey, James

    2008-04-01

    Laboratory experiments at Z use high energy density to create plasma conditions similar to extreme astrophysical environments, including stellar interiors and accretion powered objects. The importance of radiation unifies these topics, even though the plasmas involved are very different. Understanding stellar interiors requires knowledge of radiation transport in dense, hot, collision-dominated plasma. A Z x-ray source was used to measure iron plasma transmission at 156 eV electron temperature, 2x higher than in prior work. The data provide the first experimental tests of absorption features critical for stellar interior opacity models and may provide insight into whether the present discrepancy between solar models and helioseismology originates in opacity model deficiencies or in some other aspect of the solar model. In contrast, accretion physics requires interpretation of x-ray spectra from lower density photoionization-dominated plasma. Exploiting astrophysical spectra requires a spectral model that connects the observations with a model that describes the overall picture of the astrophysical object. However, photoionized plasma spectral models are largely untested. Z-pinch radiation was used to create photoionized iron and neon plasmas with photoionization parameter 5-25 erg cm /s. Comparisons with the data improve x-ray photoionization models and promote more accurate interpretation of spectra acquired with astrophysical observatories. The prospects for new experiments at the higher radiation powers provided by the recently upgraded Z facility will be described.* In collaboration with scientists from CEA, LANL, LLNL, Oxford, Prism, Queens University, Swarthmore College, U. Nevada Reno, and Sandia ++Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000.

  9. The Modeling and Simulation Catalog for Discovery, Knowledge and Reuse

    NASA Technical Reports Server (NTRS)

    Stone, George F. III; Greenberg, Brandi; Daehler-Wilking, Richard; Hunt, Steven

    2011-01-01

    The DoD M&S Steering Committee has noted that the current DoD and Service's modeling and simulation resource repository (MSRR) services are not up-to-date limiting their value to the using communities. However, M&S leaders and managers also determined that the Department needs a functional M&S registry card catalog to facilitate M&S tool and data visibility to support M&S activities across the DoD. The M&S Catalog will discover and access M&S metadata maintained at nodes distributed across DoD networks in a centrally managed, decentralized process that employs metadata collection and management. The intent is to link information stores, precluding redundant location updating. The M&S Catalog uses a standard metadata schemas based on the DoD's Net-Centric Data Strategy Community of Interest metadata specification. The Air Force, Navy and OSD (CAPE) have provided initial information to participating DoD nodes, but plans on the horizon are being made to bring in hundreds of source providers.

  10. USGS Science Data Catalog - Open Data Advances or Declines

    NASA Astrophysics Data System (ADS)

    Frame, M. T.; Hutchison, V.; Zolly, L.; Wheeler, B.; Latysh, N.; Devarakonda, R.; Palanisamy, G.; Shrestha, B.

    2014-12-01

    The recent Office of Science and Technology Policy (OSTP) White House Open Data Policies (2013) have required Federal agencies to establish formal catalogues of their science data holdings and make these data easily available on Web sites, portals, and applications. As an organization, the USGS has historically excelled at making its data holdings freely available on its various Web sites (i.e., National, Scientific Programs, or local Science Center). In response to these requirements, the USGS Core Science Analytics, Synthesis, and Libraries program, in collaboration with DOE's Oak Ridge National Laboratory (ORNL) Mercury Consortium (funded by NASA, USGS, and DOE), and a number of other USGS organizations, established the Science Data Catalog (http://data.usgs.gov) cyberinfrastructure, content management processes/tools, and supporting policies. The USGS Science Data Catalog led the charge at USGS to improve the robustness of existing/future metadata collections; streamline and develop sustainable publishing to external aggregators (i.e., data.gov); and provide leadership to the U.S. Department of Interior in emerging Open Data policies, techniques, and systems. The session will discuss the current successes, challenges, and movement toward meeting these Open Data policies for USGS scientific data holdings. A retrospective look at the last year of implementation of these efforts within USGS will occur to determine whether these Open Data Policies are improving data access or limiting data availability. To learn more about the USGS Science Data Catalog, visit us at http://data.usgs.gov/info/about.html

  11. Observations of opacity in Mars Orbiter Laser Orbiter experiment. Results from SPO orbit.

    NASA Astrophysics Data System (ADS)

    Ivanov, A. B.; Muhleman, D. O.

    1998-09-01

    Mars Orbiter Laser Altimeter (MOLA) is an instrument on board of Mars Global Surveyor spacecraft. The laser operates at 1.064 micron wavelength, emitting 8-nsec-long pulses. MOLA measures topography, reflectivity and returned pulse width. Here we will discuss reflectivity and interpret it in terms of atmospheric opacity. Reflectivity is a ratio of the returned energy to the emitted energy. It can be interpreted as a product of albedo (A) of the Martian surface and two-way atmospheric transmission ( R = A * e({) -2 tau }), where tau is atmospheric opacity. Attenuation of the MOLA signal in the atmosphere is only due to extinction of photons from the laser beam. There are practically no photons scattered into the laser beam. This allows us a very straightforward calculation of opacity, given albedo of the surface. We will present opacity calculations based on IRTM bolometric channel albedo map and red-filter camera images and discuss problems associated with opacity calculations based on these datasets. We were able to obtain values for atmospheric opacity at the MOLA wavelength (1.064 micron) during hiatus orbits (L_s = 180-220) and Science Phasing Orbits (SPO) (L_s = 300 - 367). Preliminary assessment of the results for the equatorial regions indicates clear atmosphere during start of SPO (L_s = 300-316), then opacity peaks at L_s = 330 and slowly decreases till the end of SPO observations. At the same time two other instruments (TES and MOC) on MGS were performing measurements of opacity at their corresponding wavelengths (9 micron and 0.7 micron). Atmospheric opacity is a function of the wavelength due to the scattering properties of the aerosols. We will present our approach for comparison opacity measurements at MOLA, MOC and TES wavelengths. This comparison will allow us to determine particles size distribution properties, which is an important parameter for atmospheric heating.

  12. WIFIRE Data Model and Catalog for Wildfire Data and Tools

    NASA Astrophysics Data System (ADS)

    Altintas, I.; Crawl, D.; Cowart, C.; Gupta, A.; Block, J.; de Callafon, R.

    2014-12-01

    The WIFIRE project (wifire.ucsd.edu) is building an end-to-end cyberinfrastructure for real-time and data-driven simulation, prediction and visualization of wildfire behavior. WIFIRE may be used by wildfire management authorities in the future to predict wildfire rate of spread and direction, and assess the effectiveness of high-density sensor networks in improving fire and weather predictions. WIFIRE has created a data model for wildfire resources including sensed and archived data, sensors, satellites, cameras, modeling tools, workflows and social information including Twitter feeds. This data model and associated wildfire resource catalog includes a detailed description of the HPWREN sensor network, SDG&E's Mesonet, and NASA MODIS. In addition, the WIFIRE data-model describes how to integrate the data from multiple heterogeneous sources to provide detailed fire-related information. The data catalog describes 'Observables' captured by each instrument using multiple ontologies including OGC SensorML and NASA SWEET. Observables include measurements such as wind speed, air temperature, and relative humidity, as well as their accuracy and resolution. We have implemented a REST service for publishing to and querying from the catalog using Web Application Description Language (WADL). We are creating web-based user interfaces and mobile device Apps that use the REST interface for dissemination to wildfire modeling community and project partners covering academic, private, and government laboratories while generating value to emergency officials and the general public. Additionally, the Kepler scientific workflow system is instrumented to interact with this data catalog to access real-time streaming and archived wildfire data and stream it into dynamic data-driven wildfire models at scale.

  13. The Extended Virgo Cluster Catalog

    NASA Astrophysics Data System (ADS)

    Kim, Suk; Rey, Soo-Chang; Jerjen, Helmut; Lisker, Thorsten; Sung, Eon-Chang; Lee, Youngdae; Chung, Jiwon; Pak, Mina; Yi, Wonhyeong; Lee, Woong

    2014-12-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg2 or 60.1 Mpc2. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s-1. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  14. The Extended Virgo Cluster Catalog

    NASA Astrophysics Data System (ADS)

    Rey, Soo-Chang

    2015-08-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg2 or 60.1 Mpc2. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s-1. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  15. THE EXTENDED VIRGO CLUSTER CATALOG

    SciTech Connect

    Kim, Suk; Rey, Soo-Chang; Lee, Youngdae; Chung, Jiwon; Pak, Mina; Yi, Wonhyeong; Lee, Woong; Jerjen, Helmut; Lisker, Thorsten; Sung, Eon-Chang

    2015-01-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg{sup 2} or 60.1 Mpc{sup 2}. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s{sup –1}. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  16. Automated Title Page Cataloging: A Feasibility Study.

    ERIC Educational Resources Information Center

    Weibel, Stuart; And Others

    1989-01-01

    Describes the design of a prototype rule-based system for the automation of descriptive cataloging from title pages. The discussion covers the results of tests of the prototype, major impediments to automatic cataloging from title pages, and prospects for further progress. The rules implemented in the prototype are appended. (16 references)…

  17. DIRAC File Replica and Metadata Catalog

    NASA Astrophysics Data System (ADS)

    Tsaregorodtsev, A.; Poss, S.

    2012-12-01

    File replica and metadata catalogs are essential parts of any distributed data management system, which are largely determining its functionality and performance. A new File Catalog (DFC) was developed in the framework of the DIRAC Project that combines both replica and metadata catalog functionality. The DFC design is based on the practical experience with the data management system of the LHCb Collaboration. It is optimized for the most common patterns of the catalog usage in order to achieve maximum performance from the user perspective. The DFC supports bulk operations for replica queries and allows quick analysis of the storage usage globally and for each Storage Element separately. It supports flexible ACL rules with plug-ins for various policies that can be adopted by a particular community. The DFC catalog allows to store various types of metadata associated with files and directories and to perform efficient queries for the data based on complex metadata combinations. Definition of file ancestor-descendent relation chains is also possible. The DFC catalog is implemented in the general DIRAC distributed computing framework following the standard grid security architecture. In this paper we describe the design of the DFC and its implementation details. The performance measurements are compared with other grid file catalog implementations. The experience of the DFC Catalog usage in the CLIC detector project are discussed.

  18. Planning for the Catalogs: A Managerial Perspective.

    ERIC Educational Resources Information Center

    Rosenthal, Joseph A.

    1978-01-01

    Discusses problems inherent in planning for a transition from traditional card catalogs to other catalog forms. Some attention is given to the implications of the second edition of the Anglo-American Cataloguing Rules (AACR II), the lack of an automated authority control system, and difficulties in obtaining machine-readable retrospective files.…

  19. An Approach to Developing Computer Catalogs

    ERIC Educational Resources Information Center

    MacDonald, Robin W.; Elrod, J. McRee

    1973-01-01

    A method of developing computer catalogs is proposed which does not require unit card conversion but rather the accumulation of data from operating programs. It is proposed that the bibliographic and finding functions of the catalog be separated, with the latter being the first automated. (8 references) (Author)

  20. Cataloging. ERIC Processing Manual, Section V.

    ERIC Educational Resources Information Center

    Weller, Carolyn R., Ed.

    Rules and guidelines are provided for ERIC catalogers and editors engaged in capturing bibliographic data for the documents and journal articles entered into the ERIC database. A general discussion of the principles of ERIC cataloging, definitions used, use of mandatory vs. optional data elements, etc. is provided in the Introduction. The body…

  1. Language and Cultural Minorities Resource Catalog.

    ERIC Educational Resources Information Center

    Agell, Charlotte, Comp.; And Others

    The revised and expanded 1992 version of the catalog lists almost 1,000 print and nonprint materials for use in elementary and secondary schools with linguistic minorities. The catalog contains 20 sections: Afghan; Asian and refugee; bilingual education; Chinese; civil rights; Poland; English as a Second Language (ESL); ESL instructional…

  2. Classification and Cataloging. Library Science 427.

    ERIC Educational Resources Information Center

    Foster, Donald L.

    An introductory letter, a list of general instructions on how to proceed with a correspondence course, a syllabus with examples of title pages and catalog cards, and an examination request form are presented for a correspondence course in classification and cataloging offered by the University of New Mexico's Division of Continuing Education and…

  3. The Celescope catalog of ultraviolet observations

    NASA Technical Reports Server (NTRS)

    Davis, R. J.

    1972-01-01

    Data obtained from approximately 7500 ultraviolet television pictures are used to compile a celescope catalog of ultraviolet observations. This catalog lists the magnitude as observed in each of celescope's four ultraviolet color bands, the standard deviations of the observed ultraviolet magnitudes, positions, identifications, and ground based magnitudes, colors, and spectral types for approximately 5000 stars.

  4. Cataloging-In-Publication: Problems and Prospects

    ERIC Educational Resources Information Center

    Wingate, Henry W.

    1972-01-01

    The Cataloging-in-Publication program faces a number of difficult problems. The difficulties that resulted in the failure of the 1958-59 Cataloging-in-Source program still exist, and the actual value of such a project to libraries has yet to be proved. (26 references) (Author/SJ)

  5. Short Films for Physics Teaching, A Catalog.

    ERIC Educational Resources Information Center

    Bluestone, Barbara Z.; Roth, Richard F.

    This annotated film catalog is a product of the Conference on Single Concept Films in College Physics Teaching sponsored by the Commission on College Physics. Both 8mm and 16mm single concept films are listed for physics and related disciplines. The catalog includes commercial, noncommercial, and foreign films. However, the film coverage was…

  6. The Library Catalog in a Computerized Environment

    ERIC Educational Resources Information Center

    Malinconico, S. Michael

    1976-01-01

    Discusses the need to impose a rigidly controlled structure on the machine-readable catalog, the machine capabilities and limitations for achieving that control, possibilities for machine control of the catalog, and the extension of those possibilities to permit a degree of control not possible in a manual system. (Author/LS)

  7. Auditory Learning Materials for Special Education: Catalog.

    ERIC Educational Resources Information Center

    Smith, Marsha C.; O'Connor, Phyllis

    The catalog (developed by the Great Lakes Region Special Education Instructional Materials Center) provides information on more than 100 auditory learning materials for use in special education. Described in the first section of the catalog are procedures used to evaluate and classify auditory instructional materials, including a list of…

  8. The Career Education Resource Center Annotated Catalog.

    ERIC Educational Resources Information Center

    Lawhead, Jeanie; And Others

    This catalog provides an annotated list of the career education materials which may be borrowed for previewing from the Career Education Resource Center in Colorado. Covering materials of interest to educators in kindergarten through postsecondary programs, the catalog includes items produced by classroom teachers, commercial publishers, business…

  9. Data access service of China-VO

    NASA Astrophysics Data System (ADS)

    Sang, Jian; Zhao, Yong-Heng; Cui, Chen-Zhou

    2004-09-01

    With the development of technologies and the implementation of large quantity of astronomical observation projects, astronomy faces data avalanche and has entered an information era. A basic aim of the Virtual Observatory is to provide uniform access to highly distributed, complicated, huge astronomical datasets, and to realize federation of global astronomical data resources, so that astronomers can obtain required data efficiently and conveniently for their research. China Virtual Observatory (China-VO) project designs and implements astronomical data access services based on Grid technology, and provides uniform interface to Grid client application. In this paper, we introduce the data access service toolkit development using Globus Toolkit, the Grid services encapsulation of catalogs according to the latest astronomical data standards recommended by International Virtual Observatory Alliance, the implements of catalog Cone Search access service. Furthermore, we also introduce how to construct other Grid services using above data access services.

  10. Ultraviolet light exposure and lens opacities: the Beaver Dam Eye Study.

    PubMed Central

    Cruickshanks, K J; Klein, B E; Klein, R

    1992-01-01

    OBJECTIVES. Exposure to sunlight may be a risk factor for the development of cataract. The relationships between exposure to sunlight and to the ultraviolet-B (UVB) component of light and the prevalence of lens opacities were examined in the Beaver Dam Eye Study. METHODS. Persons 43 to 84 years of age residing in Beaver Dam, Wisconsin, were examined using standardized photographic assessments of lens opacities. A questionnaire about medical history and exposure to light was administered. RESULTS. After adjusting for other risk factors, men who had higher levels of average annual ambient UVB light were 1.36 times more likely to have more severe cortical opacities than men with lower levels. However, UVB exposure was not found to be associated with nuclear sclerosis or posterior subcapsular opacities in men. Moreover, no associations with UVB exposure were found for women, who were less likely to be exposed to UVB. CONCLUSIONS: Exposure to UVB light may be associated with the severity of cortical opacities in men. However, the lack of an association in women, the group more likely to have cortical opacities, suggests that other factors may be more important in the pathogenesis of lens opacities. PMID:1456342

  11. Detailed investigations on radiative opacity and emissivity of tin plasmas in the extreme-ultraviolet region.

    PubMed

    Zeng, Jiaolong; Gao, Cheng; Yuan, Jianmin

    2010-08-01

    Radiative opacity and emissivity of tin plasmas at average ionization degree of about 10 was investigated in detail by using a fully relativistic detailed level accounting approach, in which main physical effects on the opacity were carefully taken into account. Among these physical effects, configuration interaction, in particular core-valence electron correlations, plays an important role on the determination of accurate atomic data required in the calculation of opacity. It results in a strong narrowing of lines from all transition arrays and strong absorption is located in a narrow wavelength region of 12.5-14 nm for Sn plasmas. Using a complete accurate atomic data, we investigated the opacity of Sn plasmas at a variety of physical condition. Among the respective ions of Xe6+-Xe15+ , Xe10+ has the largest absorption cross section at 13.5 nm, while the favorable physical condition for maximal absorption at 13.5 nm do not mean that Xe10+ has the largest fraction. Comparison with other theoretical results showed that a complete set of consistent accurate atomic data, which lacks very much, is essential to predict accurate opacity. Our atomic model is useful and can be applied to interpret opacity experiments. Further benchmark experiments are urgently needed to clarify the physical effects on the opacity of Sn plasmas. PMID:20866928

  12. The statistical properties of stars and their dependence on metallicity: the effects of opacity

    NASA Astrophysics Data System (ADS)

    Bate, Matthew R.

    2014-07-01

    We report the statistical properties of stars and brown dwarfs obtained from four radiation hydrodynamical simulations of star cluster formation that resolve masses down to the opacity limit for fragmentation. The calculations are identical except for their dust and gas opacities. Assuming dust opacity is proportional to metallicity, the calculations span a range of metallicities from 1/100 to 3 times solar, although we emphasize that changing the metallicity has other thermodynamic effects that the calculations do not capture (e.g. on the thermal coupling between gas and dust). All four calculations produce stellar populations whose statistical properties are difficult to distinguish from observed stellar systems, and we find no significant dependence of stellar properties on opacity. The mass functions and properties of multiple stellar systems are consistent with each other. However, we find that protostellar mergers are more common with lower opacities. Combining the results from the three calculations with the highest opacities, we obtain a stellar population consisting of more than 500 stars and brown dwarfs. Many of the statistical properties of this population are in good agreement with those observed in our Galaxy, implying that gravity, hydrodynamics, and radiative feedback may be the primary ingredients for determining the statistical properties of low-mass stars. However, we do find indications that the calculations may be slightly too dissipative. Although further calculations will be required to understand all of the effects of metallicity on stellar properties, we conclude that stellar properties are surprisingly resilient to variations of the dust and gas opacities.

  13. Using xRage to Model Heat Flow for Experiments to Measure Opacities in HED Plasmas

    NASA Astrophysics Data System (ADS)

    Elgin, L.; Vandervort, R.; Keiter, P.; Drake, R. P.; Mussack, K.; Orban, C.

    2015-11-01

    We are developing a NIF proposal to measure opacities of C, N and O at temperatures and densities relevant to the base of the solar convection zone. Our proposed experiments would provide the first opacity measurements for these elements within this HED regime. A critical feature of our experimental platform is a super-sonic radiation front propagating within the targets. Under these conditions, density remains constant across the radiation front for a couple nanoseconds, enabling a window during which the opacities of the hot and cold target may be measured simultaneously. Afterwards, hydrodynamic effects create temperature and density gradients, which would obfuscate analysis of opacity data. We are using xRage to simulate heat flow within our targets in order to estimate the time scale over which temperature and density gradients evolve. These simulations will better inform our target design and diagnostic requirements. If successful, our experiments could yield the data necessary to validate existing opacity models or provide physical insights to inform the development of new opacity models. Accurate opacity models are essential to the understanding of radiation transport within HED systems, with applications ranging from astrophysics to ICF. U.S. Department of Energy, through the NNSA-DS and SC-OFES Joint Program in High-Energy-Density Laboratory Plasmas, grant #DE-NA0001840. Los Alamos National Laboratory, LA-UR-15-25490.

  14. The impact of enhanced iron opacity on massive star pulsations: updated instability strips

    NASA Astrophysics Data System (ADS)

    Moravveji, Ehsan

    2016-01-01

    Recently, Bailey et al. made a direct measurement of the iron opacity at the physical conditions of the solar tachocline. They found that the wavelength-integrated iron opacity is roughly 75 per cent higher than what the Opacity Project (OP) and OPAL models predict. Here, we compute new opacity tables with enhanced iron and nickel contributions to the Rosseland mean opacity by 75 per cent each, and compute three dense MESA grids of evolutionary models for Galactic O- and B-type stars covering from 2.5 to 25 M⊙ from zero-age main sequence (ZAMS) until Teff = 10 000 K after the core hydrogen exhaustion. We carry out non-adiabatic mode stability analysis with GYRE, and update the extension of the instability strips of heat-driven p- and g-mode pulsators, and the hybrid slowly pulsating B (SPB) - β Cep stars. We compare the position of two confirmed late O-type β Cep and eight confirmed hybrid B-type pulsators with the new instability domains, and justify that ˜75 per cent enhancement, only in iron opacity, is sufficient to consistently reproduce the observed position of these stars on the log Teff versus log g plane. We propose that this improvement in opacities be incorporated in the input physics of new stellar models.

  15. Catalog of Infrared Observations, Third Edition

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Pitts, Patricia S.; Mead, Jaylee M.

    1993-01-01

    The Far Infrared Supplement contains a subset of the data in the full Catalog of Infrared Observations (all observations at wavelengths greater than 4.6 microns). The Catalog of Infrared Observations (CIO), NASA RP-1294, is a compilation of infrared astronomical observational data obtained from an extensive literature search of scientific journals and major astronomical catalogs and surveys. The literature search is complete for years 1965 through 1990 in this Third Edition. The Catalog contains about 210,000 observations of roughly 20,000 individual sources and supporting appendices. The expanded Third Edition contains coded IRAS 4-band data for all CIO sources detected by IRAS. The appendices include an atlas of infrared source positions (also included in this volume), two bibliographies of Catalog listings, and an atlas of infrared spectral ranges. The complete CIO database is available to qualified users in printed, microfiche, and magnetic-tape formats.

  16. Mixing length and opacity effects - Deep convective envelopes on the asymptotic giant branch

    NASA Astrophysics Data System (ADS)

    Sackmann, I.-Juliana; Boothroyd, Arnold I.

    1991-01-01

    We constructed detailed envelopes appropriate to stars on the asymptotic giant branch (AGB) for a wide range of mixing length parameter values alpha, considering different opacities, stellar masses, luminosities, and chemical compositions. Due to the molecular opacities present in the new LAOL opacity tables, a given AGB effective temperature Te requires a mixing length parameter α more than twice as large as that necessary with the older Cox and Stewart opacities. For any set of molecular opacity tables, authors should normalize their value for α by matching observations of the Sun (radius and luminosity at the solar age) or by matching the observed positions of the lower main sequence and red giant branch in the H-R diagram. (For our LAOL opacities, our normalized value turned out to be α ≍ 2.1.) Although this normalization of the mixing length results in a solar convective envelope essentially independent of molecular opacities, this is not true on the AGB: different opacities result in different conditions at the base of the convective envelope on the AGB, even after this normalization. Reliable molecular opacities are imperative for stellar models on the AGB. The temperature TCE at the base of the convective envelope is strongly dependent on the envelope mass and on the luminosity, ranging between 105 K and 107 K for our normalized value of α ≍ 2.1: hot-bottom envelope burning seems not to be totally out of reach. The effect of the chemical composition on TCE is surprisingly small: changes in helium abundance Y have a completely negligible effect, and even a large change in metallicity from Z = 0.02 to 0.001 increases TCE by only a factor of 2. On the AGB, we find that Te ∝ α1/2and R ∝ 1/α.

  17. Planning and developing the Chandra Source Catalog

    NASA Astrophysics Data System (ADS)

    Evans, Ian N.; Evans, Janet D.; Fabbiano, Guiseppina; Glotfelty, Kenny J.; McCollough, Michael L.; McDowell, Jonathan C.; Primini, Francis A.; Rots, Arnold H.

    2008-07-01

    The Chandra Source Catalog, presently being developed by the Chandra X-ray Center, will be the definitive catalog of all X-ray sources detected by the Chandra X-ray Observatory. The catalog interface will provide users with a simple mechanism to perform advanced queries on the data content of the archival holdings on a source-by-source basis for X-ray sources matching user-specified search criteria, and is intended to satisfy the needs of a broad-based group of scientists, including those who may be less familiar with astronomical data analysis in the X-ray regime. For each detected X-ray source, the catalog will record commonly tabulated quantities that can be queried, including source position, dimensions, multi-band fluxes, hardness ratios, and variability statistics, derived from all of the observations that include the source within the field of view. However, in addition to these traditional catalog elements, for each X-ray source the catalog will include an extensive set of file-based data products that can be manipulated interactively by the catalog user, including source images, event lists, light curves, and spectra from each observation in which a source is detected. In this paper, we emphasize the design and development of the Chandra Source Catalog. We describe the evaluation process used to plan the data content of the catalog, and the selection of the tabular properties and file-based data products to be provided to the user. We discuss our approach for managing catalog updates derived from either additional data from new observations or from improvements to calibrations and/or analysis algorithms.

  18. Treatment of atomic and molecular line blanketing by opacity sampling. [atmospheric optics - stellar atmospheres

    NASA Technical Reports Server (NTRS)

    Johnson, H. R.; Krupp, B. M.

    1975-01-01

    An opacity sampling (OS) technique for treating the radiative opacity of large numbers of atomic and molecular lines in cool stellar atmospheres is presented. Tests were conducted and results show that the structure of atmospheric models is accurately fixed by the use of 1000 frequency points, and 500 frequency points is often adequate. The effects of atomic and molecular lines are separately studied. A test model computed by using the OS method agrees very well with a model having identical atmospheric parameters computed by the giant line (opacity distribution function) method.

  19. Simple model atmospheres incorporating new opacities of VO and TiO

    NASA Astrophysics Data System (ADS)

    Brett, J. M.

    1989-11-01

    The effect of the VO A-X, VO B-X and TiO-upsilon molecular band opacities upon the atmospheres of red giants is investigated by construction of plane-parallel straight mean opacity models. From these simple preliminary models a limited heating of the upper atmosphere is found producing a temperature rise of up to 100 K. This result and its effect upon computed bandstrengths suggests that these opacities should be included in more accurate model atmospheres of late M stars.

  20. Seismic analysis of the solar interior. I - Can opacity changes improve the theoretical frequencies?

    NASA Technical Reports Server (NTRS)

    Korzennik, Sylvain G.; Ulrich, Roger K.

    1989-01-01

    The paper describes the application of seismic inverse theory to the deduction of properties of the solar interior using presently available measured frequencies of the solar oscillations. Only the solar opacity is included in this application. This study has used the spectral expansion method of Lanczos and Jackson to derive changes to the opacity which improve agreement between the theoretical and observed frequencies of oscillation. It is found that a family of opacity changes exists which yields models that improve the frequency agreement by amounts that are indistinguishable among the family members.

  1. Science Highlights from the SDSS DR7 Spectroscopic M Dwarf Catalog

    NASA Astrophysics Data System (ADS)

    West, Andrew A.; Bochanski, J. J.; Pineda, J.; Dhital, S.; Savcheva, A.; Jones, D.; Schluns, K.; Massey, A. P.

    2013-01-01

    We present a series of science highlights that have resulted from the SDSS DR7 spectroscopic M dwarf catalog. These highlights include (but are not limited to) a detailed magnetic activity analysis of M dwarfs as a function of their location in the Galaxy (both Galactic height and Galactocentric radius), a kinematic analysis of the local Milky Way, a study of how the time variability of M dwarfs correlates with spectral properties, an age-activity relation (using Galactic stratigraphy), a spectral catalog of wide binary pairs, a catalog of low-mass subdwarfs, a statistical parallax analysis of the M dwarfs and subdwarfs, and a technique for determining the interstellar dust content using M dwarfs. All of the SDSS and value added data are accessible for public download and reprints will be made available on site. AAW acknowledges the support of NSF grant AST-1109273

  2. A Catalog of Geologic Data for the Hanford Site

    SciTech Connect

    Horton, Duane G.; Last, George V.; Gilmore, Tyler J.; Bjornstad, Bruce N.; Mackley, Rob D.

    2005-08-01

    This revision of the geologic data catalog incorporates new boreholes drilled after September 2002 as well as other older wells, particularly from the 600 Area, omitted from the earlier catalogs. Additionally, borehole geophysical log data have been added to the catalog. This version of the geologic data catalog now contains 3,519 boreholes and is current with boreholes drilled as of November 2004.

  3. Cataloging and Expert Systems: AACR2 as a Knowledge Base.

    ERIC Educational Resources Information Center

    Hjerppe, Roland; Olander, Birgitta

    1989-01-01

    Describes a project that developed two expert systems for library cataloging using the second edition of the Anglo American Cataloging Rules (AACR2) as a knowledge base. The discussion covers cataloging as interpretation, the structure of AACR2, and the feasibility of using expert systems for cataloging in traditional library settings. (26…

  4. Cooperative Cataloging: LC Promotes Cooperation at Asian Materials Seminar.

    ERIC Educational Resources Information Center

    Fineberg, Gail

    1998-01-01

    Discusses the Asian Materials Cataloging Seminar that the Library of Congress sponsored to promote the benefits of cooperative cataloging. Highlights include the Program for Cooperative Cataloging (PCC); high-quality, standardized, core-level cataloging records for Asian materials; name authority and subject authority programs; and the CONSER…

  5. Specifications for a COM Catalog Designed for Government Documents.

    ERIC Educational Resources Information Center

    Copeland, Nora S.; And Others

    Prepared in MARC format in accordance with the Ohio College Library Center (OCLC) standards, these specifications were developed at Colorado State University to catalog a group of government publications not listed in the Monthly Catalog of United States Publications. The resulting microfiche catalog produced through the OCLC Cataloging Subsystem…

  6. Measurement of atmospheric opacity at 278 GHz at McMurdo Station, Antarctica in austral spring seasons, 1986 and 1987

    NASA Technical Reports Server (NTRS)

    De Zafra, R. L.; Jaramillo, M.; Barrett, J.; Emmons, L. K.; Parrish, A.

    1990-01-01

    A quasi-continuous record is presented of atmospheric opacity measured at 278 GHz (1.1 mm wavelength) from the McMurdo Station (Antarctica) during austral spring seasons of 1986 (August 30 - October 30) and 1987 (September 4 - October 13) with measurements taken every 20 minutes (except during storms or other periods of high opacity). All data are reduced to represent opacity in the zenith direction. It was found that, during much of September, the two successive years differed considerably in tropospheric opacity. In 1986, water vapor and attendant opacity were generally lower, due to low tropospheric temperatures. Measured opacities were found to be higher than would be expected from the empirical relationships representing opacity as a function of water vapor column density at mm-wavelengths, as proposed by Rice and Ade (1979), Zammit and Ade (1981), and Liebe (1985).

  7. Fermi Large Area Telescope Second Source Catalog

    NASA Technical Reports Server (NTRS)

    Nolan, P. L.; Abdo, A. A.; Ackermann, M.; Ajello, M; Allafort, A.; Antolini, E; Bonnell, J.; Cannon, A.; Celik O.; Corbet, R.; Davis, D. S.; DeCesar, M. E.; Ferrara, E. C.; Gehrels, N.; Harding, A. K.; Hays, E.; Johnson, T. E.; McConville, W.; McEnery, J. E; Perkins, J. S.; Racusin, J. L; Scargle, J. D.; Stephens, T. E.; Thompson, D. J.; Troja, E.

    2012-01-01

    We present the second catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24-month period. The Second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in 5 energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 11eV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely gamma-ray-producing source classes.

  8. FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG

    SciTech Connect

    Nolan, P. L.; Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Abdo, A. A.; Ackermann, M.; Antolini, E.; Bonamente, E.; Atwood, W. B.; Belfiore, A.; Axelsson, M.; Baldini, L.; Bellazzini, R.; Ballet, J.; Bastieri, D.; Bignami, G. F. E-mail: Gino.Tosti@pg.infn.it E-mail: tburnett@u.washington.edu; and others

    2012-04-01

    We present the second catalog of high-energy {gamma}-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24 month period. The second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in five energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 MeV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely {gamma}-ray-producing source classes.

  9. Development of 2MASS Catalog Server Kit

    NASA Astrophysics Data System (ADS)

    Yamauchi, Chisato

    2011-11-01

    We develop a software kit called "2MASS Catalog Server Kit" to easily construct a high-performance database server for the 2MASS Point Source Catalog (includes 470,992,970 objects) and several all-sky catalogs. Users can perform fast radial search and rectangular search using provided stored functions in SQL similar to SDSS SkyServer. Our software kit utilizes open-source RDBMS, and therefore any astronomers and developers can install our kit on their personal computers for research, observation, etc. Out kit is tuned for optimal coordinate search performance. We implement an effective radial search using an orthogonal coordinate system, which does not need any techniques that depend on HTM or HEALpix. Applying the xyz coordinate system to the database index, we can easily implement a system of fast radial search for relatively small (less than several million rows) catalogs. To enable high-speed search of huge catalogs on RDBMS, we apply three additional techniques: table partitioning, composite expression index, and optimization in stored functions. As a result, we obtain satisfactory performance of radial search for the 2MASS catalog. Our system can also perform fast rectangular search. It is implemented using techniques similar to those applied for radial search. Our way of implementation enables a compact system and will give important hints for a low-cost development of other huge catalog databases.

  10. The catalogCleaner: Separating the Sheep from the Goats

    NASA Astrophysics Data System (ADS)

    O'Brien, K.; Hankin, S. C.; Schweitzer, R.; Koyuk, H.

    2012-12-01

    The Global Earth Observation Integrated Data Environment (GEO-IDE) is NOAA's effort to successfully integrate data and information with partners in the national US-Global Earth Observation System (US-GEO) and the international Global Earth Observation System of Systems (GEOSS). As part of the GEO-IDE, the Unified Access Framework (UAF) is working to build momentum towards the goal of increased data integration and interoperability. The UAF project is moving towards this goal with an approach that includes leveraging well known and widely used standards and focusing initially on well understood data types, such as gridded data from climate models. This phased approach serves to engage data providers and users and also has a high probability of demonstrable successes. The UAF project shares the widely held conviction that the use of data standards is a key ingredient necessary to achieve interoperability. Many community-based consensus standards fail, though, due to poor compliance. Compliance problems emerge for many reasons: because the standards evolve through versions, because documentation is ambiguous or because individual data providers find the standard inadequate as-is to meet their special needs. In addition, minimalist use of standards will lead to a compliant service, but one which is of low quality. For example, serving five hundred individual files from a single climate model might be compliant, but enhancing the service so that those files are all aggregated together into one virtual dataset and available through a single access URL provides a much more useful service. The UAF project began showcasing the advantages of providing compliant data by manually building a master catalog generated from hand-picked THREDDS servers. With an understanding that educating data managers to provide standards compliant data and metadata can take years, the UAF project wanted to continue increasing the volume of data served through the master catalog as much as

  11. TRS-80 IN-STACK OPACITY COMPUTER PROGRAMS: USER AND PROGRAMMER MANUAL

    EPA Science Inventory

    The manual describes a microcomputer program written to estimate instack opacity from ducted sources. Input data required to run the program are the particle size distribution, particle refractive index, mass emission concentration, wavelength of light, particle density, and stac...

  12. A simple method to verify the opacity and equation of state of high-Z plasmas

    SciTech Connect

    Meng, Guangwei; Li, Jinghong; Yang, Jiamin; Zhu, Tuo; Zou, Shiyang; Wang, Min; Zhang, Weiyan

    2013-09-15

    Accurate opacity and equation of state (EOS) data are important parameters for reliable modeling and understanding many phenomena of high energy density physics. However, they are difficult to obtain either theoretically or experimentally especially for high-Z plasmas. In this paper, we proposed a simple method to verify the opacity and EOS of high-Z plasmas in rarefactive states, which is build on the two key aspects of ablation processes, i.e., the propagation of heatwave into materials and the hydrodynamic expansion of the blow-off plasmas. Based on the integrated analysis of the Au foil burnthrough and foam-confined plasma expansion experiments performed on the Shenguang II and Shenguang III prototype laser facilities, we suggested two semi-empirical multipliers to adjust the opacity and EOS of Au plasma. These adjusted opacity and EOS may then provide a foundation for other radiation hydrodynamic simulations under similar drive conditions.

  13. Solar neutrinos and the influence of radiative opacities on solar models

    NASA Technical Reports Server (NTRS)

    Carson, T. R.; Ezer, D.; Stothers, R.

    1973-01-01

    Use of new radiative opacities based on the hot Thomas-Fermi model of the atom yields a predicted solar neutrino flux which is still considerably larger than the flux observed in Davis's Cl-37 experiment.

  14. Large Enhancement in High-Energy Photoionization of Fe XVII and Missing Continuum Plasma Opacity

    NASA Astrophysics Data System (ADS)

    Nahar, Sultana N.; Pradhan, Anil K.

    2016-06-01

    Aimed at solving the outstanding problem of solar opacity, and radiation transport plasma models in general, we report substantial photoabsorption in the high-energy regime due to atomic core photoexcitations not heretofore considered. In extensive R -matrix calculations of unprecedented complexity for an important iron ion Fe xvii (Fe16 + ), with a wave function expansion of 99 Fe xviii (Fe17 + ) LS core states from n ≤4 complexes (equivalent to 218 fine structure levels), we find (i) up to orders of magnitude enhancement in background photoionization cross sections, in addition to strongly peaked photo-excitation-of-core resonances not considered in current opacity models, and ii) demonstrate convergence with respect to successive core excitations. The resulting increase in the monochromatic continuum, and 35% in the Rosseland mean opacity, are compared with the "higher-than-predicted" iron opacity measured at the Sandia Z -pinch fusion device at solar interior conditions.

  15. Large Enhancement in High-Energy Photoionization of Fe XVII and Missing Continuum Plasma Opacity.

    PubMed

    Nahar, Sultana N; Pradhan, Anil K

    2016-06-10

    Aimed at solving the outstanding problem of solar opacity, and radiation transport plasma models in general, we report substantial photoabsorption in the high-energy regime due to atomic core photoexcitations not heretofore considered. In extensive R-matrix calculations of unprecedented complexity for an important iron ion Fe xvii (Fe^{16+}), with a wave function expansion of 99 Fe xviii (Fe^{17+}) LS core states from n≤4 complexes (equivalent to 218 fine structure levels), we find (i) up to orders of magnitude enhancement in background photoionization cross sections, in addition to strongly peaked photo-excitation-of-core resonances not considered in current opacity models, and ii) demonstrate convergence with respect to successive core excitations. The resulting increase in the monochromatic continuum, and 35% in the Rosseland mean opacity, are compared with the "higher-than-predicted" iron opacity measured at the Sandia Z-pinch fusion device at solar interior conditions. PMID:27341239

  16. Subject Access to Archival Materials Using LCSH.

    ERIC Educational Resources Information Center

    Smiraglia, Richard P.

    1990-01-01

    Discussion of subject access to archival materials focuses on the use of Library of Congress Subject Headings (LCSH). The process of subject analysis is described, an example of the depth of cataloging for archival materials is given, and the basic principles of syndetic structure of LCSH are explained. (five references) (LRW)

  17. Subject Access Points in the MARC Record and Archival Finding Aid: Enough or Too Many?

    ERIC Educational Resources Information Center

    Cox, Elizabeth; Czechowski, Leslie

    2007-01-01

    In this research project, the authors set out to discover the current practice in both the archival and cataloging worlds for usage of access points in descriptive records and to learn how archival descriptive practices fit into long-established library cataloging procedures and practices. A sample of archival finding aids and MARC records at 123…

  18. Guidelines on Subject Access to Individual Works of Fiction, Drama, Etc. Second Edition.

    ERIC Educational Resources Information Center

    Aikawa, Hiroko; DeSirey, Jan; Gabel, Linda; Hayes, Susan; Nystrom, Kathy; Wilson, Mary Dabney; Thomas, Pat

    Though the payoffs are significant for reference librarians, readers' advisors, and library users, adding and maintaining subject access for works of imagination--fiction, poetry, and drama, for example--can mean a lot of work for the cataloging department. This new and updated edition is designed to help catalogers and others in the library to:…

  19. Prevalence and risk factors of lens opacities in rural populations living at two different altitudes in China

    PubMed Central

    Yu, Jia-Ming; Yang, De-Qi; Wang, Han; Xu, Jun; Gao, Qian; Hu, Li-Wen; Wang, Fang; Wang, Yang; Yan, Qi-Chang; Zhang, Jin-Song; Liu, Yang

    2016-01-01

    AIM To investigate the prevalence of and risk factors for lens opacities in populations living at two different altitudes in China. METHODS A total of 813 subjects aged ≥40y in Lhasa (Tibet Autonomous Region, China. Altitude: 3658 m) and Shaoxing (Zhejiang Province, China. Altitude: 15 m) were underwent eye examinations and interviewed in this cross-sectional study. Participants' lens opacities were graded according to the Lens Opacities Classification System II (LOCS II) and the types of opacities with LOCS II scores ≥2 were determined. Univariate and stepwise logistic regression were used to evaluate the associations of independent risk factors with lens opacities. RESULTS Lens opacities were significantly more prevalent in the high-altitude than in the low-altitude area (χ2=10.54, P<0.001). Lens opacities appear to develop earlier in people living at high than at low altitude. The main types of lens opacity in Lhasa and Shaoxing were mixed (23.81%) and cortical (17.87%), respectively. Independent risk factors associated with all lens opacities were age, ultraviolet (UV) radiation exposure, and educational level. Compared with participants aged 40-49y, the risk of lens opacities increased gradually from 2 to 85 times per 10y [odds ratio (OR)=2.168-84.731, P<0.05). The risk of lens opacities was about two times greater in participants with the highest UV exposure than in those with the lowest exposure (OR=2.606, P=0.001). Educational level was inversely associated with lens opacities; literacy deceased the risk by about 25% compared with illiteracy (OR=0.758, P=0.041). CONCLUSION Old age, higher UV exposure and lower educational level are important risk factors for the development of lens opacities. Lens opacities are more prevalent among high-altitude than low-altitude inhabitants. PMID:27162738

  20. Management of ground-glass opacities: should all pulmonary lesions with ground-glass opacity be surgically resected?

    PubMed Central

    Kobayashi, Yoshihisa

    2013-01-01

    Pulmonary nodules with ground-glass opacity (GGO) are frequently observed and will be increasingly detected. GGO can be observed in both benign and malignant conditions, including lung cancer and its preinvasive lesions. Atypical adenomatous hyperplasia and adenocarcinoma in situ are typically manifested as pure GGOs, whereas more advanced adenocarcinomas may include a larger solid component within the GGO region. The natural history of GGOs has been gradually clarified. Approximately 20% of pure GGOs and 40% of part-solid GGOs gradually grow or increase their solid component, whereas others remain unchanged for years. Therefore, it remains unclear whether all pulmonary lesions with GGO should be surgically resected or whether lesions without changes may not require resection. To distinguish GGOs with growth from those without growth, a 3-year follow-up observation period is a reasonable benchmark based on the data that the volume-doubling time (VDT) of pure GGOs ranges from approximately 600 to 900 days and that of part-solid GGOs ranges from 300 to 450 days. Future studies on the genetic differences between GGOs with growth and those without growth will help establish an appropriate management algorithm. PMID:25806254

  1. Management of ground-glass opacities: should all pulmonary lesions with ground-glass opacity be surgically resected?

    PubMed

    Kobayashi, Yoshihisa; Mitsudomi, Tetsuya

    2013-10-01

    Pulmonary nodules with ground-glass opacity (GGO) are frequently observed and will be increasingly detected. GGO can be observed in both benign and malignant conditions, including lung cancer and its preinvasive lesions. Atypical adenomatous hyperplasia and adenocarcinoma in situ are typically manifested as pure GGOs, whereas more advanced adenocarcinomas may include a larger solid component within the GGO region. The natural history of GGOs has been gradually clarified. Approximately 20% of pure GGOs and 40% of part-solid GGOs gradually grow or increase their solid component, whereas others remain unchanged for years. Therefore, it remains unclear whether all pulmonary lesions with GGO should be surgically resected or whether lesions without changes may not require resection. To distinguish GGOs with growth from those without growth, a 3-year follow-up observation period is a reasonable benchmark based on the data that the volume-doubling time (VDT) of pure GGOs ranges from approximately 600 to 900 days and that of part-solid GGOs ranges from 300 to 450 days. Future studies on the genetic differences between GGOs with growth and those without growth will help establish an appropriate management algorithm. PMID:25806254

  2. Catalog of infrared observations. Part 2: Appendixes

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1987-01-01

    The Catalog of Infrared Observations (CIO) is a compilation of infrared astronomical observational data obtained from an extensive literature search of astronomical journals and major astronomical catalogs and surveys. The literature searches are complete for years 1965 to 1986. Supporting appendixes are published in this part. The appendices include an atlas of infrared source positions, two bibliographies of infrared literature upon which the search was based, and, keyed to the main Catalog listings (organized alphabetically by first author, and by date), an atlas of infrared spectral ranges, and IRAS data for the CIO sources. The complete CIO database is available to qualified users in printed microfiche and magnetic tape formats.

  3. The Gaia Initial Quasar Catalog

    NASA Astrophysics Data System (ADS)

    Andrei, H.; Antón, S.; Taris, F.; Bourda, G.; Souchay, J.; Bouquillon, J.; Barache, C.; Pereira Osorio, J. J.; Charlot, P.; Vieira Martins, R.; Lambert, S.; Camargo, J. I.; da Silva Neto, D. N.; Assan, M.; le Campion, J.-F.

    2014-12-01

    We present the latest, updated, and fully corrected version of the Gaia Initial QSO Catalog (GIQC), produced by the CU3 GWP-S-335-13000. It contains 1 248 372 objects, of which 191 802 are considered and marked as Defining ones, because of their observational history and existence of spectroscopic redshift. Also objects with strong, calibrator-like radio emission are included in this category. The Defining objects represent a clean sample of quasars. The remaining objects aim to bring completeness to the GIQC at the time of its compilation. For the whole GIQC the average density is 30.3 sources per sq.deg., practically all sources have an indication of magnitude and of morphological indexes, and 90% of the sources have an indication of redshift and of variability indexes.

  4. NASA Video Catalog. Supplement 14

    NASA Technical Reports Server (NTRS)

    2004-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Coverage Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  5. NASA Video Catalog. Supplement 13

    NASA Technical Reports Server (NTRS)

    2003-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Coverage Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  6. Data catalog of satellite experiments

    NASA Technical Reports Server (NTRS)

    1971-01-01

    This catalog is divided into three sections: data description contains descriptions of data available at or through NSSDC as well as descriptions of the experiments and spacecraft from which the data originated; and supporting data contains brief descriptions of space environment models and programs distributed by NSSDC. Section 3 is a series of indexes that contain: (1) a listing of all spacecraft, experiment, and data descriptions presented in Section 1 plus tables indicating the period for which each spacecraft was operational; (2) an index of all spacecraft described here, identified by common names and alternate names; (3) a listing of the original experiment institutions for all experiments described; (4) a listing of the investigators associated with the experiments and their current affiliations; and (5) an index of all experiments sorted by phenomenon measured.

  7. NASA Video Catalog. Supplement 12

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This report lists 1878 video productions from the NASA STI Database. This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The listing of the entries is arranged by STAR categories. A complete Table of Contents describes the scope of each category. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  8. NASA Video Catalog. Supplement 15

    NASA Technical Reports Server (NTRS)

    2005-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Coverage Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  9. Alpha Dithering to Correct Low-Opacity 8 Bit Compositing Errors

    SciTech Connect

    Williams, P L; Frank, R J; LaMar, E C

    2003-03-31

    This paper describes and analyzes a dithering technique for accurately specifying small values of opacity ({alpha}) that would normally not be possible because of the limited number of bits available in the alpha channel of graphics hardware. This dithering technique addresses problems related to compositing numerous low-opacity semitransparent polygons to create volumetric effects with graphics hardware. The paper also describes the causes and a possible solution to artifacts that arise from parallel or distributed volume rendering using bricking on multiple GPU's.

  10. Early solar mass loss, opacity uncertainties, and the solar abundance problem

    SciTech Connect

    Guzik, Joyce Ann; Keady, John; Kilcrease, David

    2009-01-01

    Solar models calibrated with the new element abundance mixture of Asplund et al. published in 2005 no longer produce good agreement with the sound speed, convection zone depth, and convection zone helium abundance inferred from solar oscillation data. Attempts to modify the input physics of the standard model, for example, by including enhanced diffusion, increased opacities, accretion, convective overshoot, or gravity waves have not restored the good agreement attained with the prior abundances. Here we present new models including early mass loss via a stronger solar wind. Early mass loss has been investigated prior to the solar abundance problem to deplete lithium and resolve the 'faint early sun problem'. We find that mass loss modifies the core structure and deepens the convection zone, and so improves agreement with oscillation data using the new abundances: however the amount of mass loss must be small to avoid destroying all of the surface lithium, and agreement is not fully restored. We also considered the prospects for increasing solar interior opacities. In order to increase mixture opacities by the 30% required to mitigate the abundance problem, the opacities of individual elements (e.g., O, N, C, and Fe) must be revised by a factor of two to three for solar interior conditions: we are investigating the possibility of broader calculated line wings for bound-bound transitions at the relevant temperatures to enhance opacity. We find that including all of the elements in the AGS05 opacity mixture (through uranium at atomic number Z=92) instead of only the 17 elements in the OPAL opacity mixture increases opacities by a negligible 0.2%.

  11. Efficacy of Systemic Vitamin C Supplementation in Reducing Corneal Opacity Resulting from Infectious Keratitis

    PubMed Central

    Cho, Yong-Wun; Yoo, Woong-Sun; Kim, Seong-Jae; Chung, In-Young; Seo, Seong-Wook; Yoo, Ji-Myong

    2014-01-01

    Abstract The objective of this study was to determine the effect of vitamin C supplementation on reducing the size of corneal opacity resulting from infectious keratitis. The study included 82 patients (82 affected eyes), admitted for infectious keratitis from January 2009 to August 2013, who were followed for more than 3 months. Patients were divided into control, oral vitamin C (3 g/d), and intravenous vitamin C (20 g/d) groups during hospitalization. Corneal opacity sizes were measured using anterior segment photographs and Image J program (version 1.27; National Institutes of Health, Jinju, South Korea) at admission, discharge, and final follow-up. The corneal opacity size used for analysis was the measured opacity size divided by the size of the whole cornea. The corneal opacity size decreased by 0.03 ± 0.10 in the oral vitamin C group, 0.07 ± 0.22 in the intravenous vitamin C group, and 0.02 ± 0.15 in the control group. Intravenous vitamin C reduced the corneal opacity size more than oral vitamin C (P = 0.043). Intravenous vitamin C produced greater reduction in corneal opacity size in younger patients (P = 0.015) and those with a hypopyon (P = 0.036). Systemic vitamin C supplementation reduced the size of corneal opacity resulting from infectious keratitis. Intravenous vitamin C was more beneficial than oral supplementation, especially in younger patients and those with hypopyon. PMID:25415664

  12. Penetrating keratoplasty restoring vision in an unusual case of corneal opacity following exposure to Euphorbia latex.

    PubMed

    Dutta, Jayanta; Choudhury, Somnath; Lahiri, Kapildeb; Savale, Smruti; Banerjee, Monideepa; Datta, Himadri

    2015-10-01

    The milky sap of the Euphorbia plant is highly toxic and causes inflammation to the skin and eyes. Damage to the eye ranges from superficial epithelial defects, keratoconjunctivitis, mild to moderate corneal edema, anterior uveitis, Descemet membrane folds, raised intraocular pressure and rarely corneal opacity in severe untreated cases. Here we report a case of visual restoration by optical penetrating keratoplasty in a patient with severe corneal opacity following exposure to Euphorbia latex. PMID:25540165

  13. Molecular clouds in galaxies with different Z - Fragmentation of diffuse clouds driven by opacity

    NASA Technical Reports Server (NTRS)

    Franco, Jose; Cox, Donald P.

    1986-01-01

    Molecular clouds are formed from diffuse interstellar clouds when the external ultraviolet radiation field is prevented from penetrating into the cloud. The opacity is provided mainly by dust grains and the required column density to the cloud center is larger than about 5 x 10 to the 20th (solar Z/Z)/sq cm. This high-opacity criterion could have a significant impact on the radial trends observed in spiral galaxies, and on the distinctions between spiral and dwarf irregular galaxies.

  14. Shock tube technique for measuring opacities at high pressures for gaseous-core nuclear rockets.

    NASA Technical Reports Server (NTRS)

    Patch, R. W.

    1971-01-01

    A new method of opacity determination is described that uses an improved shock tube design and is applicable to measurements of Planck and Rosseland mean opacities in hydrogen or seeded hydrogen at hydrogen partial pressures of 500 atm, at temperatures from 2300 to 8000 K. The selection of seed materials to be added to the gases to make them semiopaque is discussed. Currently favored seeds are silicon and carbon or graphite for reactive seeds, and depleted uranium and tungsten 184 for nonreactive seeds.

  15. Online catalog of world-wide test sites for the post-launch characterization and calibration of optical sensors

    USGS Publications Warehouse

    Chander, G.; Christopherson, J.B.; Stensaas, G.L.; Teillet, P.M.

    2007-01-01

    In an era when the number of Earth-observing satellites is rapidly growing and measurements from these sensors are used to answer increasingly urgent global issues, it is imperative that scientists and decision-makers can rely on the accuracy of Earth-observing data products. The characterization and calibration of these sensors are vital to achieve an integrated Global Earth Observation System of Systems (GEOSS) for coordinated and sustained observations of Earth. The U.S. Geological Survey (USGS), as a supporting member of the Committee on Earth Observation Satellites (CEOS) and GEOSS, is working with partners around the world to establish an online catalog of prime candidate test sites for the post-launch characterization and calibration of space-based optical imaging sensors. The online catalog provides easy public Web site access to this vital information for the global community. This paper describes the catalog, the test sites, and the methodologies to use the test sites. It also provides information regarding access to the online catalog and plans for further development of the catalog in cooperation with calibration specialists from agencies and organizations around the world. Through greater access to and understanding of these vital test sites and their use, the validity and utility of information gained from Earth remote sensing will continue to improve. Copyright IAF/IAA. All rights reserved.

  16. VizieR Online Data Catalog: US Naval Observatory Pleiades Catalog (Van Flandern 1969)

    NASA Astrophysics Data System (ADS)

    van Flandern, T. C.

    1996-02-01

    This catalog is a special subset of the Eichhorn et al. (1970) Pleiades catalog (see ) updated to B1950.0 positions and with proper motions added. It was prepared for the purpose of predicting occultations of Pleiades stars by the Moon, but is useful for general applications because it contains many faint stars not present in the current series of large astrometric catalogs. (1 data file).

  17. The effect of Livermore OPAL opacities on the evolutionary masses of RR Lyrae stars

    NASA Technical Reports Server (NTRS)

    Yi, Sukyoung; Lee, Young-Wook; Demarque, Pierre

    1993-01-01

    We have investigated the effect of the new Livermore OPAL opacities on the evolution of horizontal-branch (HB) stars. This work was motivated by the recent stellar pulsation calculations using the new Livermore opacities, which suggest that the masses of double-mode RR Lyrae stars are 0.1-0.2 solar mass larger than those based on earlier opacities. Unlike the pulsation calculations, we find that the effect of opacity change on the evolution of HB stars is not significant. In particular, the effect of the mean masses of RR Lyrae stars is very small, showing a decrease of only 0.01-0.02 solar mass compared to the models based on old Cox-Stewart opacities. Consequently, with the new Livermore OPAL opacities, both the stellar pulsation and evolution models now predict approximately the same masses for the RR Lyrae stars. Our evolutionary models suggest that the mean masses of the RR Lyrae stars are about 0.76 and about 0.71 solar mass for M15 (Oosterhoff group II) and M3 (group I), respectively. If (alpha/Fe) = 0.4, these values are decreased by about 0.03 solar mass. Variations of the mean masses of RR Lyrae stars with HB morphology and metallicity are also presented.

  18. Comparison of Fe and Ni opacity calculations for a better understanding of pulsating stellar envelopes

    NASA Astrophysics Data System (ADS)

    Gilles, D.; Turck-Chièze, S.; Loisel, G.; Piau, L.; Ducret, J.-E.; Poirier, M.; Blenski, T.; Thais, F.; Blancard, C.; Cossé, P.; Faussurier, G.; Gilleron, F.; Pain, J. C.; Porcherot, Q.; Guzik, J. A.; Kilcrease, D. P.; Magee, N. H.; Harris, J.; Busquet, M.; Delahaye, F.; Zeippen, C. J.; Bastiani-Ceccotti, S.

    2011-12-01

    Opacity is an important ingredient of the evolution of stars. The calculation of opacity coefficients is complicated by the fact that the plasma contains partially ionized heavy ions that contribute to opacity dominated by H and He. Up to now, the astrophysical community has greatly benefited from the work of the contributions of Los Alamos [1], Livermore [2] and the Opacity Project (OP) [3]. However unexplained differences of up to 50% in the radiative forces and Rosseland mean values for Fe have been noticed for conditions corresponding to stellar envelopes. Such uncertainty has a real impact on the understanding of pulsating stellar envelopes, on the excitation of modes, and on the identification of the mode frequencies. Temperature and density conditions equivalent to those found in stars can now be produced in laboratory experiments for various atomic species. Recently the photo-absorption spectra of nickel and iron plasmas have been measured during the LULI 2010 campaign, for temperatures between 15 and 40 eV and densities of ˜3 mg/cm3. A large theoretical collaboration, the "OPAC", has been formed to prepare these experiments. We present here the set of opacity calculations performed by eight different groups for conditions relevant to the LULI 2010 experiment and to astrophysical stellar envelope conditions.

  19. A statistical method for treating molecular line opacities. [in cool stellar atmospheres

    NASA Technical Reports Server (NTRS)

    Sneden, C.; Johnson, H. R.; Krupp, B. M.

    1976-01-01

    A method for treating atomic and molecular line opacities in cool stellar atmospheres by a statistical opacity sampling is investigated. Under the usual assumptions of plane-parallel geometry, radiative equilibrium, hydrostatic equilibrium, and LTE, each radiative quantity is computed monochromatically at each chosen frequency and depth without any averaging of the opacity. The number of frequencies needed to allow an accurate integration of the energy flux over a given spectral interval is investigated as a function of depth, including opacity for both CN and C2. This method is extended to the calculation of a model atmosphere of a star, and the effect of the number and placement of frequency points is studied. The method is applied to treating molecular lines of CO, C2, and CN in a cool carbon star. Significant advantages of the opacity sampling method are its flexibility, which permits computation of models having arbitrary variations of chemical composition and of opacity with wavelength and depth, and generalizability to include departures from LTE.

  20. Exploring central opacity and asymptotic scenarios in elastic hadron scattering

    NASA Astrophysics Data System (ADS)

    Fagundes, D. A.; Menon, M. J.; Silva, P. V. R. G.

    2016-02-01

    In the absence of a global description of the experimental data on elastic and soft diffractive scattering from the first principles of QCD, model-independent analyses may provide useful phenomenological insights for the development of the theory in the soft sector. With that in mind, we present an empirical study on the energy dependence of the ratio X between the elastic and total cross sections; a quantity related to the evolution of the hadronic central opacity. The dataset comprises all the experimental information available on proton-proton and antiproton-proton scattering in the c.m. energy interval 5 GeV-8 TeV. Generalizing previous works, we discuss four model-independent analytical parameterizations for X, consisting of sigmoid functions composed with elementary functions of the energy and three distinct asymptotic scenarios: either the standard black disk limit or scenarios above or below that limit. Our two main conclusions are the following: (1) although consistent with the experimental data, the black disk does not represent an unique solution; (2) the data reductions favor a semi-transparent scenario, with asymptotic average value for the ratio X bar = 0.30 ± 0.12. In this case, within the uncertainty, the asymptotic regime may already be reached around 1000 TeV. We present a comparative study of the two scenarios, including predictions for the inelastic channel (diffraction dissociation) and the ratio associated with the total cross-section and the elastic slope. Details on the selection of our empirical ansatz for X and physical aspects related to a change of curvature in this quantity at 80-100 GeV, indicating the beginning of a saturation effect, are also presented and discussed.

  1. Catalogs of Space Shuttle earth observations photography

    NASA Technical Reports Server (NTRS)

    Lulla, Kamlesh; Helfert, Michael

    1990-01-01

    A review is presented of postflight cataloging and indexing activities of mission data obtained from Space Shuttle earth observations photography. Each Space Shuttle mission acquires 1300-4400 photographs of the earth that are reviewed and interpreted by a team of photointerpreters and cataloging specialists. Every photograph's manual and electronic set of plots is compared for accuracy of its locational coordinates. This cataloging activity is a critical and principal part of postflight activity and ensures that the database is accurate, updated and consequently made meaningful for further utilization in the applications and research communities. A final product in the form of a Catalog of Space Shuttle Earth Observations Handheld Photography is published for users of this database.

  2. Choice and Form of Access Points According to AACR 2.

    ERIC Educational Resources Information Center

    Swanson, Edward

    1990-01-01

    Reviews the basic rules in the "Anglo American Cataloguing Rules, 2nd edition" (AACR 2) and in "Archives, Personal Papers and Manuscripts" (APPM) that are needed for determining access points when cataloging an archival or manuscript work. The form of access points for personal names, geographic names, and corporate names are also reviewed. (four…

  3. Subject Access to Serial Publications in Toronto Bank Libraries.

    ERIC Educational Resources Information Center

    Shubert, Steven Blake

    1991-01-01

    A survey of five major bank libraries revealed three distinct levels of subject access to serial publications: manually based systems with no formal subject access; computer-aided systems in which the sorting capabilities of computerized serials management are utilized to generate printed lists arranged by subject; and online catalogs with subject…

  4. The Magellan volcanic and magmatic feature catalog

    NASA Technical Reports Server (NTRS)

    Crumpler, L. S.; Aubele, Jayne C.; Head, J. W.

    1993-01-01

    A catalog summarizing the location and characteristics of 1663 volcanic and magmatic centers identified in Magellan radar images of the surface of Venus is in final preparation to be submitted as a Geological Society of America Special Paper. The following is a brief summary preview of the contents and methods used in assembling the final data set, the organization of the catalog, and other notes of interest to potential users.

  5. CMR Catalog Service for the Web

    NASA Technical Reports Server (NTRS)

    Newman, Doug; Mitchell, Andrew

    2016-01-01

    With the impending retirement of Global Change Master Directory (GCMD) Application Programming Interfaces (APIs) the Common Metadata Repository (CMR) was charged with providing a collection-level Catalog Service for the Web (CSW) that provided the same level of functionality as GCMD. This talk describes the capabilities of the CMR CSW API with particular reference to the support of the Committee on Earth Observation Satellites (CEOS) Working Group on Information Systems and Services (WGISS) Integrated Catalog (CWIC).

  6. TRADEX autonomous catalog maintenance experiment (TRACM)

    NASA Astrophysics Data System (ADS)

    Six, Stephen W.; LeClair, Raymond A.

    1996-10-01

    The TRADEX radar at the Kwajalein Missile Range (KMR) introduces a new debris characteriation capability to the space surveillance commuity. A single-sensor debris cataloging capability for small uncorrelated targets (UCTs) was recently demonstrated in a TRADEX autonomous catalog maintenance (TRACM) experiment. The experiment validated a number of new TRADEX space surveillance tools and integrated them with the unique Stare and Chase mode in which TRADEX finds and tracks small UCTs (objects less than 10 cm in diameter) at a rate of one new object per hour. Orbital elements for Stare and Chase acquisitions were determined from recorded track data and were of sufficient quality to permit re-acquisition by TRaDEX on subsequent passes. The experimental procedure is described and results are summarized in terms of successful re-tracks for objects maintained in a local proof-of-concept catalog. The catalog was established during the second half of a two month effort and individual debris objects were cataloged for up to 26 days. Comparison of TRADEX re-track performance for UCTs versus re-track performance for objects already cataloged by the space surveillance network (SSN) are also indicated. Conclusions and recommendations for further work are included.

  7. Survey and Merging of Sunspot Catalogs

    NASA Astrophysics Data System (ADS)

    Lefevre, Laure; Clette, Frédéric

    2014-02-01

    In view of the construction of new sunspot-based activity indices and proxies, we conducted a comprehensive survey of all existing catalogs providing detailed parameters of photospheric features over long time intervals. Although there are a fair number of such catalogs, a global evaluation showed that they suffer from multiple limitations: finite or fragmented time coverage, limited temporal overlap between catalogs, and, more importantly, a mismatch in contents and conventions. Starting from the existing material, we demonstrate how the information from parallel catalogs can be merged to form a much more comprehensive record of sunspots and sunspot groups. To do this, we use the uniquely detailed Debrecen Photoheliographic Data (DPD), which is already a composite of several ground-based observatories and of SOHO data, and the USAF/Mount Wilson catalog from the Solar Observing Optical Network (SOON). We also outline our cross-identification method, which was needed to match the non-overlapping solar active-region nomenclature. This proved to be the most critical and subtle step when working with multiple catalogs. This effort, focused here first on the last two solar cycles, should lead to a better central database that collects all available sunspot group parameters to address future solar-cycle studies beyond the traditional sunspot-index time series [ R i].

  8. Iron Opacity Bump Changes the Stability and Structure of Accretion Disks in Active Galactic Nuclei

    NASA Astrophysics Data System (ADS)

    Jiang, Yan-Fei; Davis, Shane W.; Stone, James M.

    2016-08-01

    Accretion disks around supermassive black holes have regions where the Rosseland mean opacity can be larger than the electron scattering opacity due to the large number of bound–bound transitions in iron. We study the effects of this iron opacity “bump” on the thermal stability and vertical structure of radiation-pressure-dominated accretion disks, utilizing three-dimensional radiation magnetohydrodynamic (MHD) simulations in the local shearing box approximation. The simulations self-consistently calculate the heating due to MHD turbulence caused by magneto-rotational instability and radiative cooling by using the radiative transfer module based on a variable Eddington tensor in Athena. For a 5 × 108 solar mass black hole with ˜3% of the Eddington luminosity, a model including the iron opacity bump maintains its structure for more than 10 thermal times without showing significant signs of thermal runaway. In contrast, if only electron scattering and free–free opacity are included as in the standard thin disk model, the disk collapses on the thermal timescale. The difference is caused by a combination of (1) an anti-correlation between the total optical depth and the midplane pressure, and (2) enhanced vertical advective energy transport. These results suggest that the iron opacity bump may have a strong impact on the stability and structure of active galactic nucleus (AGN) accretion disks, and may contribute to a dependence of AGN properties on metallicity. Since this opacity is relevant primarily in UV emitting regions of the flow, it may help to explain discrepancies between observation and theory that are unique to AGNs.

  9. Iron Opacity Bump Changes the Stability and Structure of Accretion Disks in Active Galactic Nuclei

    NASA Astrophysics Data System (ADS)

    Jiang, Yan-Fei; Davis, Shane W.; Stone, James M.

    2016-08-01

    Accretion disks around supermassive black holes have regions where the Rosseland mean opacity can be larger than the electron scattering opacity due to the large number of bound–bound transitions in iron. We study the effects of this iron opacity “bump” on the thermal stability and vertical structure of radiation-pressure-dominated accretion disks, utilizing three-dimensional radiation magnetohydrodynamic (MHD) simulations in the local shearing box approximation. The simulations self-consistently calculate the heating due to MHD turbulence caused by magneto-rotational instability and radiative cooling by using the radiative transfer module based on a variable Eddington tensor in Athena. For a 5 × 108 solar mass black hole with ∼3% of the Eddington luminosity, a model including the iron opacity bump maintains its structure for more than 10 thermal times without showing significant signs of thermal runaway. In contrast, if only electron scattering and free–free opacity are included as in the standard thin disk model, the disk collapses on the thermal timescale. The difference is caused by a combination of (1) an anti-correlation between the total optical depth and the midplane pressure, and (2) enhanced vertical advective energy transport. These results suggest that the iron opacity bump may have a strong impact on the stability and structure of active galactic nucleus (AGN) accretion disks, and may contribute to a dependence of AGN properties on metallicity. Since this opacity is relevant primarily in UV emitting regions of the flow, it may help to explain discrepancies between observation and theory that are unique to AGNs.

  10. The influence of urban area opacity on biologically active UV-B irradiance

    NASA Astrophysics Data System (ADS)

    Chubarova, Nataly; Rozental', Victor

    2013-04-01

    The study of UV irradiance changes in urban area is an essential problem due to the significant effect of UV irradiance on human health which can be positive (vitamin D synthesis) and negative (erythema, skin cancer, eye damage). According to the results of several experiments within the Moscow megacity we studied the effects of urban area opacity on the different types of biologically active UV-B irradiance on the base of a specially developed mobile photometric complex snd additional measurements of the urban opacity by Nikon Fisheye Converter FC-E8. We analyzed both the level of erythemally-active irradiance and the UV eye damaging radiation using the broadband UVB-1 YES pyranometer calibrated against ultraviolet spectroradiometer Bentham DTM-300 of the Medical University of Innsbruck (courtesy of Dr. M.Blumthaler). In order to estimate the effects of the urban opacity the measurements were normalized on similar measurements at the Meteorological Observatory of Moscow State University with zero opacity. This ratio is defined as an urban radiative transmittance (URT). Different atmospheric conditions were considered. In cloudy conditions the effect of opacity on URT is much less than that in conditions when the sun disk is open from clouds. We revealed some spectral features in transmittance of biologically active UV-B irradiance which is characterized by higher URT variations in overcast cloudy conditions due to more intensive scattering and smaller direct solar radiation component. In the absence of cloudiness the effect of opacity was studied for open and screening solar disk conditions. We obtained much higher URT in UVB spectral region compared with that for total solar irradiance for screening solar disk conditions with a significant URT dependence on the opacity only in UVB spectral region. No URT dependence was obtained for total solar irradiance in these conditions. Some model calculations were fulfilled to match the experimental results.

  11. Experimental Validation of Modeled Fe Opacities at Conditions Approaching the Base of the Solar Convection Zone

    NASA Astrophysics Data System (ADS)

    Nagayama, Taisuke

    2013-10-01

    Knowledge of the Sun is a foundation for other stars. However, after the solar abundance revision in 2005, standard solar models disagree with helioseismic measurements particularly at the solar convection zone base (CZB, r ~ 0 . 7 ×RSun) [Basu, et al., Physics Reports 457, 217 (2008)]. One possible explanation is an underestimate in the Fe opacity at the CZB [Bailey et al., Phys. Plasmas 16, 058101 (2009)]. Modeled opacities are important physics inputs for plasma simulations (e.g. standard solar models). However, modeled opacities are not experimentally validated at high temperatures because of three challenging criteria required for reliable opacity measurements: 1) smooth and strong backlighter, 2) plasma condition uniformity, and 3) simultaneous measurements of plasma condition and transmission. Fe opacity experiments are performed at the Sandia National Laboratories (SNL) Z-machine aiming at conditions close to those at the CZB (i.e. Te = 190 eV, ne = 1 ×1023 cm-3). To verify the quality of the experiments, it is critical to investigate how well the three requirements are satisfied. The smooth and strong backlighter is provided by the SNL Z-pinch dynamic hohlraum. Fe plasma condition is measured by mixing Mg into the Fe sample and employing Mg K-shell line transmission spectroscopy. Also, an experiment is designed and performed to measure the level of non-uniformity in the Fe plasma by mixing Al and Mg dopants on the opposite side of the Fe sample and analyzing their spectra. We will present quantitative results on these investigations as well as the comparison of the measured opacity to modeled opacities. Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000.

  12. Lens opacity based modelling of the age-related straylight increase.

    PubMed

    Rozema, Jos J; Sanchez, Victoria; Artal, Natalia; Gramajo, Ana L; Torres, Eduardo; Luna, Jose D; Iribarren, Rafael; Tassignon, Marie-José; Juarez, Claudio P

    2015-12-01

    This work studies ethnic and geographical differences in the age-related straylight increase by means of a stochastic model and unpublished lens opacity data of 559 residents of Villa Maria (Argentina), as well as data of 912 Indonesian subjects published previously by Husain et al. For both cohorts the prevalence of each type and grade of lens opacity was determined as a function of age, from which a stochastic model was derived capable of simulating the lens opacity prevalence for both populations. These simulated lens opacity data were then converted to estimated straylight by means of an equation derived from previously recorded data of 107 eyes with varying degrees of cataract. Based on these opacity templates 2500 random sets of subject age and lens opacity data were generated by the stochastic model for each dataset, from which estimated straylight could be calculated. For the Argentinian data the estimated straylight was found to closely resemble the published models for age-related straylight increase. For younger eyes the straylight variation of the model was the same as what was previously published (in both cases ±0.200logunits), which doubled in size for older eyes. For the Indonesian data, however, this age-related straylight increase was found to be fundamentally different from the published age model. This suggests that current normative curves for age-related straylight increase may not always be appropriate for non-European populations, and that the inter-individual straylight variations in young, healthy eyes may possibly be due to variations in lens opacities. PMID:26459146

  13. A new in vitro method to evaluate radio-opacity of endodontic sealers

    PubMed Central

    Malka, V B; Hochscheidt, G L; Larentis, N L; Grecca, F S; Kopper, P M P

    2015-01-01

    Objectives: To evaluate a new method for assessing the radio-opacity of endodontic sealers and to compare radio-opacity values with a well-established standard method. Methods: The sealers evaluated in this study were AH Plus® (Dentsply DeTrey GmbH, Konstanz, Germany), Endo CPM Sealer (EGEO SRL, Buenos Aires, Argentina) and MTA Fillapex® (Angelus Dental Products Industry S/A, Londrina, Parana, Brazil). Two methods were used to evaluate radio-opacity: (D) standard discs and (S) a tissue simulator. For (D), ten standard discs were prepared for each sealer and were radiographed using Digora® phosphor storage plates (Soredex; Orion Corporation, Helsinki, Finland), alongside an aluminium stepwedge. For (S), polyethylene tubes filled with sealer (n = 10 for each) were radiographed inside the simulator as described. The digital images were analysed using Adobe Photoshop® software v. 10.0 (Adobe Systems, San Jose, CA). To compare the radio-opacity among the sealers, the data were analysed by ANOVA and Tukey's test, and to compare methods, they were analysed by the Mann–Whitney U test. To compare the data obtained from dentin and sealers in method (S), Student's paired t-test was used (=0.05). Results: In both methods, the sealers showed significant differences, according to the following decreasing order: AH Plus, MTA Fillapex and Endo CPM. In (D), MTA Fillapex and Endo CPM showed less radio-opacity than aluminium. For all of the materials, the radio-opacity was higher in (S) than in (D). Compared with dentin, all of the materials were more radio-opaque. Conclusions: The comparison of the two assessment methods for sealer radio-opacity testing validated the use of a tissue simulator block. PMID:25651275

  14. Experimental investigation of opacity models for stellar interiors, inertial fusion, and high energy density plasmas

    NASA Astrophysics Data System (ADS)

    Bailey, James

    2008-11-01

    Theoretical opacities are required for calculating energy transport in plasmas. In particular, understanding stellar interiors, inertial fusion, and Z-pinches depends on the opacities of mid-atomic-number elements in the 150-300 eV temperature range. These models are complex and experimental validation is crucial. For example, solar models presently disagree with helioseismology and one possible explanation is inadequate opacities. Testing these opacities requires a uniform plasma at temperatures high enough to produce the ion charge states that exist in the sun. Typical opacity experiments heat a sample using x-rays and measure the spectrally resolved transmission with a backlight. The difficulty grows as the temperature increases because the heating x-ray source must supply more energy and the backlighter source must be bright enough to overwhelm the plasma self emission. These problems were overcome using the dynamic hohlraum x-ray source at Sandia's Z facility to measure the transmission of a mixed Mg-Fe plasma heated above 150 eV. This capability will also advance opacity science for other high energy density plasmas. This tutorial describes opacity experiment challenges including accurate transmission measurements, plasma diagnostics, and quantitative model comparisons. The solar interior serves as a focal problem and Z facility experiments are used to illustrate the techniques. **In collaboration with C. Iglesias (LLNL), R. Mancini (U. Nevada), J.MacFarlane, I. Golovkin and P. Wang (Prism), C. Blancard, Ph. Cosse, G. Faussurier, F. Gilleron, and J.C. Pain (CEA), J. Abdallah Jr. (LANL), and G.A. Rochau and P.W. Lake (Sandia). ++Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94AL85000.

  15. Aspects of the Problems of Bibliographic Access to University Library Collections.

    ERIC Educational Resources Information Center

    Aguolu, C. C.

    1979-01-01

    Problems of providing bibliographic access to university library-based information sources are discussed with focus upon bibliographies, card and union catalogs, and library classification schemes. (Author/MBR)

  16. BOOK CATALOG AND CARD CATALOG--A COST AND SERVICE STUDY.

    ERIC Educational Resources Information Center

    CHILDERS, THOMAS; AND OTHERS

    THIS STUDY, COVERING BOTH TECHNICAL AND PUBLIC SERVICES, IS BASED ON TWO YEARS' OPERATION OF THE CENTRAL LIBRARY AND BRANCHES OF THE BALTIMORE COUNTY PUBLIC LIBRARY--THE LAST YEAR THE CARD CATALOG WAS USED AND THE FIRST YEAR OF USING THE COMPUTER-PRODUCED BOOK CATALOG. THE FIGURES, CONTAINING SOME EXTRAPOLATIONS, WERE OBTAINED FROM THE LIBRARY'S…

  17. The Corruption of Cataloging (and) Catalog Outsourcing: No Clear-Cut Choice.

    ERIC Educational Resources Information Center

    Gorman, Michael; Holt, Glen

    1995-01-01

    Discusses the importance of cataloging to library service and addresses some of the debilitating effects that downsizing or elimination of cataloging departments, combined with outsourcing, and the consequent decline in bibliographic integrity, have on library service. Includes a sidebar on outsourcing. (JKP)

  18. Catalog of Apollo experiment operations

    NASA Technical Reports Server (NTRS)

    Sullivan, Thomas A.

    1994-01-01

    This catalog reviews Apollo mission reports, preliminary science reports, technical crew debriefings, lunar surface operations plans, and various relevant lunar experiment documents, collecting engineering- and operation-specific information by experiment. It is organized by discrete experimental and equipment items emplaced or operated on the lunar surface or at zero gravity during the Apollo missions. It also attempts to summarize some of the general problems encountered on the surface and provides guidelines for the design of future lunar surface experiments with an eye toward operations. Many of the problems dealt with on the lunar surface originated from just a few novel conditions that manifested themselves in various nasty ways. Low gravity caused cables to stick up and get caught on feet, and also made it easy for instruments to tip over. Dust was a problem and caused abrasion, visibility, and thermal control difficulties. Operating in a pressure suit limited a person's activity, especially in the hands. I hope to capture with this document some of the lessons learned from the Apollo era to make the jobs of future astronauts, principle investigators, engineers, and operators of lunar experiments more productive.

  19. The International Mouse Strain Resource (IMSR): cataloging worldwide mouse and ES cell line resources.

    PubMed

    Eppig, Janan T; Motenko, Howie; Richardson, Joel E; Richards-Smith, Beverly; Smith, Cynthia L

    2015-10-01

    The availability of and access to quality genetically defined, health-status known mouse resources is critical for biomedical research. By ensuring that mice used in research experiments are biologically, genetically, and health-status equivalent, we enable knowledge transfer, hypothesis building based on multiple data streams, and experimental reproducibility based on common mouse resources (reagents). Major repositories for mouse resources have developed over time and each has significant unique resources to offer. Here we (a) describe The International Mouse Strain Resource that offers users a combined catalog of worldwide mouse resources (live, cryopreserved, embryonic stem cells), with direct access to repository sites holding resources of interest and (b) discuss the commitment to nomenclature standards among resources that remain a challenge in unifying mouse resource catalogs. PMID:26373861

  20. LANDSAT: Non-US standard catalog no. N-33

    NASA Technical Reports Server (NTRS)

    1975-01-01

    A catalog used for dissemination of information regarding the availability of LANDSAT imagery is presented. The Image Processing Facility of the Goddard Space Flight Center, publishes a U.S. and a Non-U.S. Standard Catalog on a monthly schedule, and the catalogs identify imagery which has been processed and input to the data files during the referenced month. The U.S. Standard Catalog includes imagery covering the continental United States, Alaska and Hawaii; the Non-U.S. Catalog identifies all the remaining coverage. Imagery adjacent to the continental U.S. and Alaska borders is included in the U.S. Standard Catalog.

  1. Historical geoscientific collections - requirements on digital cataloging and problems

    NASA Astrophysics Data System (ADS)

    Ehling, A.

    2011-12-01

    The Federal Institute for Geosciences and Natural Resources maintains comprehensive geoscientific collections: the historical collections of Prussian Geological Survey in Berlin (19th and 20th century; about 2 mio specimen) and the geoscientific collections of the 20th century in Hannover (about 800.000 specimen). Nowadays, where financial support is strictly bound to efficiency and rentability on one side and the soaring (among young people - nearly exclusive) use of the web for the research, it is mandatory to provide the information about the available stock of specimen on the web. The digital cataloging has being carried out since 20 years: up to now about 40 % of the stock has been documented in 20 access-databases. The experiences of 20 years digital cataloging as well as the contact with professional users allow to formulate the requirements on a modern digital database with all accordingly problems. The main problems are different kinds of specimen: minerals, rocks, fossils, drill cores with diverging descriptions; obsolescent names of minerals, rocks and geographical sites; generations of various inventory numbers; inhomogeneous data (quantity and quality). Out of it result requirements to much, well educated manpower on the one side and an intelligent digital solution on the other side: it should have an internationally useable standard considering all the described local problems.

  2. Connecting NovaNET and PLATO to an External Database: The University of Illinois Library Online Catalog.

    ERIC Educational Resources Information Center

    Avner, Elaine; Avner, Allen

    This paper provides the documentation for the program that provides access to the University of Illinois Online Catalog (OLC), together with a script to be used with 17 slides explaining the development of the program. Advantages of connecting a database to a computer-assisted instruction (CAI) system are outlined and sources of additional…

  3. NASA scientific and technical publications: A catalog of special publications, reference publications, conference publications, and technical papers, 1991-1992

    NASA Technical Reports Server (NTRS)

    1993-01-01

    This catalog lists 458 citations of all NASA Special Publications, NASA Reference Publications, NASA Conference Publications, and NASA Technical Papers that were entered into the NASA Scientific and Technical Information database during accession year 1991 through 1992. The entries are grouped by subject category. Indexes of subject terms, personal authors, and NASA report numbers are provided.

  4. NASA scientific and technical publications: A catalog of special publications, reference publications, conference publications, and technical papers, 1989

    NASA Technical Reports Server (NTRS)

    1990-01-01

    This catalog lists 190 citations of all NASA Special Publications, NASA Reference Publications, NASA Conference Publications, and NASA Technical Papers that were entered into the NASA scientific and technical information database during accession year 1989. The entries are grouped by subject category. Indexes of subject terms, personal authors, and NASA report numbers are provided.

  5. NASA scientific and technical publications: A catalog of Special Publications, Reference Publications, Conference Publications, and Technical Papers, 1987

    NASA Technical Reports Server (NTRS)

    1988-01-01

    This catalog lists 239 citations of all NASA Special Publications, NASA Reference Publications, NASA Conference Publications, and NASA Technical Papers that were entered in the NASA scientific and technical information database during accession year 1987. The entries are grouped by subject category. Indexes of subject terms, personal authors, and NASA report numbers are provided.

  6. Enhancing the Management of a High School's Non-Print Media Collection through a Computer Databased Bibliographic Cataloging System.

    ERIC Educational Resources Information Center

    Fischer, David L.

    Through the development and use of a computer databased bibliographic cataloging system, this practicum aimed to improve the organization and management of the non-print media collections housed in a Native American Indian reservation's high school language arts department and library in order for the teaching staff to gain better access to the…

  7. Version 1 of the Hubble Source Catalog

    DOE PAGESBeta

    Whitmore, Bradley C.; Allam, Sahar S.; Budavari, Tamas; Casertano, Stefano; Downes, Ronald A.; Donaldson, Thomas; Fall, S. Michael; Lubow, Stephen H.; Quick, Lee; Strolger, Louis -Gregory; et al

    2016-05-11

    The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160 thousand HST exposures. Source lists from Data Release 8 of the Hubble Legacy Archive are matched using an algorithm developed by Budavari & Lubow (2012). The mean photometric accuracy for the catalog as a whole is better than 0.10 mag, with relative accuracy as good as 0.02 mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10 mas, with a value for the mode (i.e., most common value) of 2.3 mas. The absolute astrometric accuracy is better thanmore » $$\\sim$$0.1 arcsec for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. Here, we provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog.« less

  8. Fermi Large Area Telescope Second Source Catalog

    NASA Astrophysics Data System (ADS)

    Nolan, P. L.; Abdo, A. A.; Ackermann, M.; Ajello, M.; Allafort, A.; Antolini, E.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Belfiore, A.; Bellazzini, R.; Berenji, B.; Bignami, G. F.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Bonnell, J.; Borgland, A. W.; Bottacini, E.; Bouvier, A.; Brandt, T. J.; Bregeon, J.; Brigida, M.; Bruel, P.; Buehler, R.; Burnett, T. H.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Campana, R.; Cañadas, B.; Cannon, A.; Caraveo, P. A.; Casandjian, J. M.; Cavazzuti, E.; Ceccanti, M.; Cecchi, C.; Çelik, Ö.; Charles, E.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Chipaux, R.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Cominsky, L. R.; Conrad, J.; Corbet, R.; Cutini, S.; D'Ammando, F.; Davis, D. S.; de Angelis, A.; DeCesar, M. E.; DeKlotz, M.; De Luca, A.; den Hartog, P. R.; de Palma, F.; Dermer, C. D.; Digel, S. W.; Silva, E. do Couto e.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Dumora, D.; Enoto, T.; Escande, L.; Fabiani, D.; Falletti, L.; Favuzzi, C.; Fegan, S. J.; Ferrara, E. C.; Focke, W. B.; Fortin, P.; Frailis, M.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giebels, B.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Grondin, M.-H.; Grove, J. E.; Guillemot, L.; Guiriec, S.; Gustafsson, M.; Hadasch, D.; Hanabata, Y.; Harding, A. K.; Hayashida, M.; Hays, E.; Hill, A. B.; Horan, D.; Hou, X.; Hughes, R. E.; Iafrate, G.; Itoh, R.; Jóhannesson, G.; Johnson, R. P.; Johnson, T. E.; Johnson, A. S.; Johnson, T. J.; Kamae, T.; Katagiri, H.; Kataoka, J.; Katsuta, J.; Kawai, N.; Kerr, M.; Knödlseder, J.; Kocevski, D.; Kuss, M.; Lande, J.; Landriu, D.; Latronico, L.; Lemoine-Goumard, M.; Lionetto, A. M.; Llena Garde, M.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Marelli, M.; Massaro, E.; Mazziotta, M. N.; McConville, W.; McEnery, J. E.; Mehault, J.; Michelson, P. F.; Minuti, M.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A. A.; Mongelli, M.; Monte, C.; Monzani, M. E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Nakamori, T.; Naumann-Godo, M.; Norris, J. P.; Nuss, E.; Nymark, T.; Ohno, M.; Ohsugi, T.; Okumura, A.; Omodei, N.; Orlando, E.; Ormes, J. F.; Ozaki, M.; Paneque, D.; Panetta, J. H.; Parent, D.; Perkins, J. S.; Pesce-Rollins, M.; Pierbattista, M.; Pinchera, M.; Piron, F.; Pivato, G.; Porter, T. A.; Racusin, J. L.; Rainò, S.; Rando, R.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reposeur, T.; Ritz, S.; Rochester, L. S.; Romani, R. W.; Roth, M.; Rousseau, R.; Ryde, F.; Sadrozinski, H. F.-W.; Salvetti, D.; Sanchez, D. A.; Saz Parkinson, P. M.; Sbarra, C.; Scargle, J. D.; Schalk, T. L.; Sgrò, C.; Shaw, M. S.; Shrader, C.; Siskind, E. J.; Smith, D. A.; Spandre, G.; Spinelli, P.; Stephens, T. E.; Strickman, M. S.; Suson, D. J.; Tajima, H.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Thompson, D. J.; Tibaldo, L.; Tibolla, O.; Tinebra, F.; Tinivella, M.; Torres, D. F.; Tosti, G.; Troja, E.; Uchiyama, Y.; Vandenbroucke, J.; Van Etten, A.; Van Klaveren, B.; Vasileiou, V.; Vianello, G.; Vitale, V.; Waite, A. P.; Wallace, E.; Wang, P.; Werner, M.; Winer, B. L.; Wood, D. L.; Wood, K. S.; Wood, M.; Yang, Z.; Zimmer, S.

    2012-04-01

    We present the second catalog of high-energy γ-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24 month period. The second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in five energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 MeV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely γ-ray-producing source classes. We dedicate this paper to the memory of our colleague Patrick Nolan, who died on 2011 November 6. His career spanned much of the history of high-energy astronomy from space and his work on the Large Area Telescope (LAT) began nearly 20 years ago when it was just a concept. Pat was a central member in the operation of the LAT collaboration and he is greatly missed.

  9. Version 1 of the Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Whitmore, Bradley C.; Allam, Sahar S.; Budavári, Tamás; Casertano, Stefano; Downes, Ronald A.; Donaldson, Thomas; Fall, S. Michael; Lubow, Stephen H.; Quick, Lee; Strolger, Louis-Gregory; Wallace, Geoff; White, Richard L.

    2016-06-01

    The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope (HST) by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive (HLA) into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160,000 HST exposures. Source lists from Data Release 8 of the HLA are matched using an algorithm developed by Budavári & Lubow. The mean photometric accuracy for the catalog as a whole is better than 0.10 mag, with relative accuracy as good as 0.02 mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10 mas, with a value for the mode (i.e., most common value) of 2.3 mas. The absolute astrometric accuracy is better than 0''\\hspace{-0.5em}. 1 for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. We provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog.

  10. Night and Day: The Opacity of Clouds Measured by the Mars Orbiter Laser Altimeter (MOLA)

    NASA Technical Reports Server (NTRS)

    Neumann, G. A.; Wilson, R. J.

    2006-01-01

    The Mars Orbiter Laser Altimeter (MOLA) [l] on the Mars Global Surveyor spacecraft ranged to clouds over the course of nearly two Mars years [2] using an active laser ranging system. While ranging to the surface, the instrument was also able to measure the product of the surface reflectivity with the two-way atmospheric transmission at 1064 nm. Furthermore, the reflectivity has now been mapped over seasonal cycles using the passive radiometric capability built into MOLA [3]. Combining these measurements, the column opacity may be inferred. MOLA uniquely provides these measurements both night and day. This study examines the pronounced nighttime opacity of the aphelion season tropical water ice clouds, and the indiscernibly low opacity of the southern polar winter clouds. The water ice clouds (Figure 1) do not themselves trigger the altimeter but have measured opacities tau > 1.5 and are temporally and spatially correlated with temperature anomalies predicted by a Mars Global Circulation Model (MGCM) that incorporates cloud radiative effects [4]. The south polar CO2 ice clouds trigger the altimeter with a very high backscatter cross-section over a thickness of 3-9 m and are vertically dispersed over several km, but their total column opacities lie well below the MOLA measurement limit of tau = 0.7. These clouds correspond to regions of supercooled atmosphere that may form either very large specularly reflecting particles [2] or very compact, dense concentrations (>5x10(exp 6)/cu m) of 100-p particles

  11. The degree of roentgenographic parenchymal opacities attributable to smoking among asbestos-exposed subjects

    SciTech Connect

    Barnhart, S.; Thornquist, M.; Omenn, G.S.; Goodman, G.; Feigl, P.; Rosenstock, L. )

    1990-05-01

    Considerable controversy surrounds the question of whether cigarette smoking has the potential to increase the prevalence of small opacities on chest roentgenographs among asbestos-exposed workers. To compare the relative contribution of smoking with other predictors of the presence of roentgenographic small opacities, we examined 661 men enrolled in a double-blind, randomized trial designed to assess the efficacy of vitamin A and beta-carotene in the prevention of lung cancer among workers with heavy occupational asbestos exposure. Subjects in the study population had a mean latency of 35 yr from first asbestos exposure and a mean of 28 yr in their trade. The prevalence of roentgenographic abnormalities consistent with asbestos exposure was 26% for pleural abnormalities alone, 10% for parenchymal abnormalities alone, and 20% for pleural and parenchymal abnormalities together. We investigated occupation, age, latency from first asbestos exposure, and smoking status as predictors of roentgenographic small opacities. Smoking history, independent of latency, contributed to the prevalence and extent of small opacities, but its effect was less than that of latency. We conclude, that in the setting of heavy occupational exposure to asbestos, cigarette smoking confers added risk for the development of roentgenographic small opacities.

  12. Influence of molecular opacities on the generation of cool star winds

    NASA Astrophysics Data System (ADS)

    Helling, Ch.; Woitke, P.; Winters, J. M.; Sedlmayr, E.

    The possible influence of radiation pressure on molecules on the generation of winds of cool late-type stars is investigated. Strong molecular absorption may levitate the outer atmosphere of the star and improve the conditions for dust formation, or it might even drive a considerable outflow of matter alone. Our investigations are performed in the framework of the time-dependent hydrodynamical models developed by Fleischer et al. In these models, the radiation pressure on molecules is described in the grey approximation, where the flux weighted opacity is replaced by a certain pre-tabulated mean opacity. We have computed new mean gas opacities on the basis of molecular line and continuum opacity data (Jorgensen et al.), and calculated hydrodynamical models by using Planck and Rosseland means, which should provide an upper and lower limit for the effects of molecular absorption, respectively. The response of the circumstellar shell to strong molecular absorption is found to be complex concerning both the hydrodynamical and thermodynamical structure and the properties of the wind. In models computed with Planck mean opacities, the gas density is usually found to be smaller such that the conditions for effective dust formation are worsened. However, a mainly molecular driven wind may occur for particular ranges of stellar parameters. A further interesting feature of these models is the occurrence of pressure inversions at small radial distances from the star. Such inversions already appear in the static initial model and are preserved in the dynamic calculations.

  13. Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments

    NASA Astrophysics Data System (ADS)

    Gilles, D.; Turck-Chièze, S.; Busquet, M.; Thais, F.; Loisel, G.; Piau, L.; Ducret, J. E.; Blenski, T.; Blancard, C.; Cossé, P.; Faussurier, G.; Gilleron, F.; Pain, J. C.; Porcherot, Q.; Guzik, J. A.; Kilcrease, D. P.; Magee, N. H.; Harris, J.; Bastiani-Ceccotti, S.; Delahaye, F.; Zeippen, C. J.

    2013-11-01

    Seismology of stars is strongly developing. To address this question we have formed an international collaboration, OPAC, to perform specific experimental measurements, compare opacity calculations, and improve the opacity calculations in stellar codes [1]. We consider the following opacity codes: SCO, CASSANDRA, STA, OPAS, LEDCOP, OP, SCO-RCG. Their comparison has shown large differences for Fe and Ni in equivalent conditions of envelopes of type II supernova precursors, temperatures between 15 and 40 eV and densities of a few mg/cm3 [2-4]. LEDCOP, OPAS, SCO-RCG structure codes and STA give similar results and differ from OP ones for the lower temperatures and for spectral interval values [3]. In this work we discuss the role of Configuration Interaction (CI) and the influence of the number of used configurations. We present and include in the opacity code comparisons new HULLAC-v9 calculations [5, 6] that include full CI. To illustrate the importance of this effect we compare different CI approximations (modes) available in HULLAC-v9 [7]. These results are compared to previous predictions and to experimental data. Differences with OP results are discussed.

  14. Simultaneous unfolding of compression and opacity from time-resolved radiography

    NASA Astrophysics Data System (ADS)

    Swift, D.; Hawreliak, J.; Rothman, S.; Kritcher, A.; Doeppner, T.; Collins, G.; Gaffney, J.; Rose, S.

    2013-06-01

    Radiographs of symmetric objects can be analyzed to give the spatial variation of attenuation, as in the Abel inversion of an axisymmetric object. If the opacity is known, the mass density can be derived from the attenuation. The space- and time-variation of density is needed to make equation of state (EOS) measurements by radiography, e.g. by measuring the speed and compression of a shock. However, in our experiments using hohlraum drive at the National Ignition Facility (NIF) to perform EOS measurements at gigabar pressures with spherically-converging shocks, the opacity may vary by an order of magnitude because of ionization. We have developed a new algorithm to simultaneously deduce the compression and opacity of the sample given time-resolved radiographs with a Lagrangian location behind the shock, such as the edge of the sample. This approach relies on spatial integration to deduce the opacity in the region just behind the shock from the difference between the known and apparent mass. We assume that the change in opacity is dominated by shock-heating, so that subsequent variations, as shocked material is either released or compressed further, are negligible or can be accounted for by a model. We used this algorithm to analyze our NIF data on the Hugoniot of CH at 10-40 TPa. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

  15. Wider pulsation instability regions for β Cephei and SPB stars calculated using new Los Alamos opacities

    SciTech Connect

    Walczak, Przemysław; Fontes, Christopher John; Colgan, James Patrick; Kilcrease, David Parker; Guzik, Joyce Ann

    2015-08-13

    Here, our goal is to test the newly developed OPLIB opacity tables from Los Alamos National Laboratory and check their influence on the pulsation properties of B-type stars. We calculated models using MESA and Dziembowski codes for stellar evolution and linear, nonadiabatic pulsations, respectively. We derived the instability domains of β Cephei and SPB-types for different opacity tables OPLIB, OP, and OPAL. As a result, the new OPLIB opacities have the highest Rosseland mean opacity coefficient near the so-called Z-bump. Therefore, the OPLIB instability domains are wider than in the case of OP and OPAL data.

  16. SDSS DR7 WHITE DWARF CATALOG

    SciTech Connect

    Kleinman, S. J.; Nitta, A.; Kepler, S. O.; Pelisoli, Ingrid; Pecanha, Viviane; Costa, J. E. S.; Koester, D.; Krzesinski, J.; Dufour, P.; Lachapelle, F.-R.; Bergeron, P.; Yip, Ching-Wa; Harris, Hugh C.; Eisenstein, Daniel J.; Althaus, L.; Corsico, A.

    2013-01-15

    We present a new catalog of spectroscopically confirmed white dwarf stars from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits to 14,120 DA and 1011 DB white dwarf spectra from 12,843 and 923 stars, respectively. These numbers represent more than a factor of two increase in the total number of white dwarf stars from the previous SDSS white dwarf catalogs based on DR4 data. Our distribution of subtypes varies from previous catalogs due to our more conservative, manual classifications of each star in our catalog, supplementing our automatic fits. In particular, we find a large number of magnetic white dwarf stars whose small Zeeman splittings mimic increased Stark broadening that would otherwise result in an overestimated log g if fit as a non-magnetic white dwarf. We calculate mean DA and DB masses for our clean, non-magnetic sample and find the DB mean mass is statistically larger than that for the DAs.

  17. Government documents and the online catalog.

    PubMed

    Lynch, F H; Lasater, M C

    1990-01-01

    Prior to planning for implementing the NOTIS system, the Vanderbilt Medical Center Library had not fully cataloged its government publications, and records for these materials were not in machine-readable format. A decision was made that patrons should need to look in only one place for all library materials, including the Health and Human Services Department publications received each year from the central library's Government Documents Unit. Beginning in 1985, these publications were added to the library's database, and the entire 7,200-piece collection is now in the online catalog. Working with these publications has taught the library much about the advantages and disadvantages of cataloging government documents in an online environment. It was found that OCLC cataloging copy is eventually available for most titles, although only about 10% of the records have MeSH headings. Staff time is the major expenditure; problems are caused by documents' irregular nature, frequent format changes, and difficult authority work. Since their addition to the online catalog, documents are used more and the library has better control. PMID:2295010

  18. The Catalog of Southern Ringed Galaxies

    NASA Astrophysics Data System (ADS)

    Buta, R.

    1995-01-01

    The Catalog of Southern Ringed Galaxies (CSRG) is a comprehensive compilation of diameters, axis ratios, relative bar position angles, and morphologies of inner and outer rings, pseudorings, and lenses in 3692 galaxies south of declination -17 deg. The purpose of the catalog is to evaluate the idea that these ring phenomena are related to orbital resonances with a bar or oval in galaxy potentials. The catalog is based on visual inspection of most of the 606 fields of the Science Research Council (SRC) IIIa-J southern sky survey, with the ESO-B, ESO-R, and Palomar Sky surveys used as auxiliaries when needed for overexposed core regions. The catalog is most complete for SRC fields 1-303 (mostly south of declination -42 deg). In addition to ringed galaxies, a list of 859 mostly nonringed galaxies intended for comparison with other catalogs is provided. Other findings from the CSRG that are not based on statistics are the identification of intrinsic bar/ring misalignment; bars which underfill inner rings; dimpling of R'1 pseudorings; pointy, rectangular, or hexagonal inner or outer ring shapes; a peculiar polar-ring-related system; and other extreme examples of spiral structure and ring morphology.

  19. Catalog of infrared observations. Part 1: Data

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1987-01-01

    The Catalog of Infrared Observations (CIO) is a compilation of infrared astronomical observational data obtained from an extensive literature search of astronomical journals and major astronomical catalogs and surveys. The literature searches are complete for 1965 through 1986 in this Second Edition. The Catalog is published in two parts, with the observational data (roughly 200,000 observations of 20,000 individual sources) listed in Part I, and supporting appendices in Part II. The expanded Second Edition contains a new feature: complete IRAS 4-band data for all CIO sources detected, listed with the main Catalog observations, as well as in complete detail in the Appendix. The appendices include an atlas of infrared source positions, two bibliographies of infrared literature upon which the search was based, and, keyed to the main Catalog listings (organized alphabetically by author and then chronologically), an atlas of infrared spectral ranges, and IRAS data from the CIO sources. The complete CIO database is available to qualified users in printed microfiche and magnetic tape formats.

  20. Physical and Chemical Processes Opacity Project: an Overview and Some Preliminary Results

    NASA Astrophysics Data System (ADS)

    Mendoza, C.

    1990-11-01

    RESUMEN. El Proyecto de la Opacidad es un esfuerzo internacional dedicado a calcular con precisi6n la gran cantidad de datos at6micos que se necesitan para estimar opacidades en los envolventes estelares. Describimos el panorama general del proyecto incluyendo aspectos astrofisicos, flsico-at6micos y computacionales. El volumen y calidad de los datos que se estan generando se puede apreciar en los resultados preliminares que se presentan. ABSTRACT The Opacity Project is an international effort dedicated to the calculation of the vast, accurate, atomic data required to estimate stellar envelope opacities. We give an overview of the project including astrophysical, atomic-physical and computational aspects. The volume and quality of the data which are being generated can be appreciated in the preliminary results that are presented. }% words: ATOMIC PROCESSES - OPACITIES - STARS-INThRIORS

  1. Theoretical and experimental activities on opacities for a good interpretation of seismic stellar probes

    NASA Astrophysics Data System (ADS)

    Turck-Chièze, S.; Loisel, G.; Gilles, D.; Thais, F.; Bastiani, S.; Blancard, C.; Busquet, M.; Caillaud, T.; Cosse, P.; Blenski, T.; Delahaye, F.; Educret, J.; Faussurier, G.; Gilleron, F.; Guzik, J.; Harris, J. W.; Kilcrease, D. P.; Magee, N. H.; Piau, L.; Pain, J. C.; Poirier, M.; Porcherot, Q.; Reverdin, C.; Silvert, V.; Villette, B.; Zeippen, C.

    2011-01-01

    Opacity calculations are basic ingredients of stellar modelling. They play a crucial role in the interpretation of acoustic modes detected by SoHO, COROT and KEPLER. In this review we present our activities on both theoretical and experimental sides. We show new calculations of opacity spectra and comparisons between eight groups who produce opacity spectra calculations in the domain where experiments are scheduled. Real differences are noticed with real astrophysical consequences when one extends helioseismology to cluster studies of different compositions. Two cases are considered presently: (1) the solar radiative zone and (2) the beta Cephei envelops. We describe how our experiments are performed and new preliminary results on nickel obtained in the campaign 2010 at LULI 2000 at Polytechnique.

  2. Models of H II regions - Heavy element opacity, variation of temperature

    NASA Technical Reports Server (NTRS)

    Rubin, R. H.

    1985-01-01

    A detailed set of H II region models that use the same physics and self-consistent input have been computed and are used to examine where in parameter space the effects of heavy element opacity is important. The models are briefly described, and tabular data for the input parameters and resulting properties of the models are presented. It is found that the opacities of C, Ne, O, and to a lesser extent N play a vital role over a large region of parameter space, while S and Ar opacities are negligible. The variation of the average electron temperature T(e) of the models with metal abundance, density, and T(eff) is investigated. It is concluded that by far the most important determinator of T(e) is metal abundance; an almost 7000 K difference is expected over the factor of 10 change from up to down abundances.

  3. Opacity of the Martian atmosphere from the Mars Orbiter Laser Altimeter (MOLA) observations

    NASA Astrophysics Data System (ADS)

    Ivanov, Anton B.; Muhleman, Duane O.

    1998-12-01

    In this paper we present an analysis of the Mars Orbiter Laser Altimeter (MOLA) reflectivity measurements from the Mars Global Surveyor (MGS) spacecraft, during period of solar longitudes (Ls) 198° → 212°. Reflectivity can be interpreted as a product of the surface geometrical albedo and the two-way atmospheric transmission. Relative surface albedos were obtained from the red filter of Viking Color Mars Digital Mosaics (MDIM) to derive opacities at the MOLA wavelength (1.064 µm). Opacity measurements are interpreted in terms of atmospheric aerosol loading in the canyons. We also observed sudden increase of opacity in the northern regions (65°N), which we interpret as condensing ice clouds.

  4. TGCat : THE CHANDRA TRANSMISSION GRATING DATA CATALOG AND ARCHIVE

    SciTech Connect

    Huenemoerder, David P.; Dewey, Daniel; Nowak, Michael A.; Schulz, Norbert S.; Davis, John E.; Houck, John C.; Marshall, Herman L.; Noble, Michael S.; Canizares, Claude R.; Mitschang, Arik; Nichols, Joy S.; Morgan, Doug

    2011-04-15

    The Chandra Transmission Grating Data Archive and Catalog (TGCat) provides easy access to analysis-ready products, specifically, high-resolution X-ray count spectra and their corresponding calibrations. The web interface makes it easy to find observations of a particular object, type of object, or type of observation; to quickly assess the quality and potential usefulness of the spectra from pre-computed summary plots; or to customize a view with an interactive plotter, optionally combining spectra over multiple orders or observations. Data and responses can be downloaded as a package or as individual files, and the query results themselves can be retrieved as ASCII or Virtual Observatory tables. Portable reprocessing scripts used to create the archive and which use the Chandra X-ray Center's (CXC's) software and other publicly available software are also available, facilitating standard or customized reprocessing from Level 1 CXC archival data to spectra and responses with minimal user interaction.

  5. Descriptive Cataloging: A Selected, Annotated Bibliography, 1984-1985.

    ERIC Educational Resources Information Center

    Cook, C. Donald; Jones, Ellen

    1986-01-01

    This annotated bibliography of materials published during 1984-1985 on descriptive cataloging covers bibliographic control, Anglo American Cataloging Rules, 2nd edition (AACR2), specific types of materials, authority control, retrospective conversion, management issues, expert systems, and manuals. (EM)

  6. CPC2 - the Second Cape Photographic Catalog - Part Two - Conventional Plate Adjustment and Catalog Construction

    NASA Astrophysics Data System (ADS)

    Zacharias, N.; de Vegt, C.; Nicholson, W.; Penston, M. J.

    1992-02-01

    The Second Cape Photographic Catalog CPC 2, containing positions and visual magnitudes of 276 t 31 stars in the approximate magnitude range V= 6.5-10.5 is the first modern photographic catalog project on the southern hemisphere with an optimal fourfold plate overlap pattern and an astrometrically optimized spectral bandpass in the yellow - red region (530-640 nm). During the period 1962-1972 a total number of 5820 plates has been taken at Cape Observatory with a newly designed 4-element lens (F:10, f=20O0 mm, 4°.1 × 4°.1 field, scale = 100" mm-1). All plates have two 3 min exposures, shifted by about 50" in declination. Plate measurement has been accomplished on the GALAXY astrometric measuring machine at RGO Herstmonceux. As a joint effort of RGO and Hamburg Observatories the astrometric data reduction and catalog construction is being performed at Hamburg Observatory whereas the photographic photometry which provided visual magnitudes for all program stars has been carried out entirely at RGO by M. Penston. Paper I deals with the project and catalog, while a completely independent block adjustment solution will be given in Paper III. This paper (II) describes the astrometric results based on the classical single plate adjustment. The adopted reference star catalog is the Southern Reference Star Catalog SRS, provided by USNO in two versions FK 4/B1950 and FK 5/J2000, together with a preliminary system of proper motions. Plate reductions have been carried out independently with these two catalog versions and results are given in both systems. For the plate reductions an 8-parameter weighted least squares solution has been adopted, with non orthogonal and plate tilt parameters as common unknowns for both exposures. Weights are based on an adopted constant m.e. of 110 mas for all x, y - measurements and individual catalog accuracies of the reference star positions. A small third order term of optical distortion, has been applied to the x, y - measurements before

  7. Momentum deposition on Wolf-Rayet winds: Nonisotropic diffusion with effective gray opacity

    NASA Technical Reports Server (NTRS)

    Gayley, Kenneth G.; Owocki, Stanley P.; Cranmer, Steven R.

    1995-01-01

    We derive the velocity and mass-loss rate of a steady state Wolf-Rayet (WR) wind, using a nonisotropic diffusion approximation applied to the transfer between strongly overlapping spectral lines. Following the approach of Friend & Castor (1983), the line list is assumed to approximate a statistically parameterized Poisson distribution in frequency, so that photon transport is controlled by an angle-dependent, effectively gray opacity. We show the nonisotropic diffusion approximation yields good agreement with more accurate numerical treatments of the radiative transfer, while providing analytic insight into wind driving by multiple scattering. We illustrate, in particular, that multiple radiative momentum deposition does not require that potons be repeatedly reflected across substantial distances within the spherical envelope, but indeed is greatest when photons undergo a nearly local diffusion, e.g., through scattering by many lines closely spaced in frequency. Our results reiterate the view that the so-called 'momentum problem' of Wolf-Rayet winds is better characterized as an 'opacity problem' of simply identfying enough lines. One way of increasing the number of thick lines in Wolf-Rayet winds is to transfer opacity from saturated to unsaturated lines, yielding a steeper opacity distribution than that found in OB winds. We discuss the implications of this perspective for extending our approach to W-R wind models that incorporate a more fundamental treatment of the ionization and excitation processes that determine the line opacity. In particular, we argue that developing statistical descriptions of the lines to allow an improved effective opacity for the line ensemble would offer several advantages for deriving such more fundamental W-R wind models.

  8. Managing and Distributing Historical Tsunami Catalogs via the Web

    NASA Astrophysics Data System (ADS)

    Dunbar, P. K.

    2004-12-01

    Advances in internet technology have made it easy to "publish" data. The challenge now lies in meaningful presentation of these data. The National Geophysical Data Center (NGDC) and co-located World Data Center for Solid Earth Geophysics, Boulder, publishes large amounts of heterogeneous data on the web, including several historical tsunami catalogs that have been merged into one digital database. These catalogs vary in geographic as well as time coverage. They also have different quality levels and histories. Since historical tsunami data are valuable in the verification and testing of numerical models, it is important to know the quality of the data. It is our responsibility to make this information available with the data. NGDC is addressing this problem by developing a system that supports internal data management and improvement as well as public access to these data. These tools include a data dictionary, quality assessment tools built on relational database management systems (RDBMS), and web-based interfaces designed for many audiences. Storing the data in a RDBMS facilitates the integration of several tables related to a database, such as additional comments and references. For example, NGDC is in the process of scanning several original source documents that include eyewitness accounts of tsunami effects and making this information available as hyperlinks from the web pages. The RDBMS also facilitates the integration of several related databases, such as tsunami sources, tsunami runups, and significant earthquakes. All of these tools are more powerful when they are combined with a GIS-driven spatial selection tool integrated into an internet mapping environment. The maps provide integrated web-based GIS access to individual GIS layers including tsunami sources, tsunami effects, significant earthquakes, volcano locations, and various spatial reference layers such as topography, population density, and political boundaries. The map service also provides ftp

  9. The Chandra Deep Field-South Survey: 4 Ms Source Catalogs

    NASA Astrophysics Data System (ADS)

    Xue, Y. Q.; Luo, B.; Brandt, W. N.; Bauer, F. E.; Lehmer, B. D.; Broos, P. S.; Schneider, D. P.; Alexander, D. M.; Brusa, M.; Comastri, A.; Fabian, A. C.; Gilli, R.; Hasinger, G.; Hornschemeier, A. E.; Koekemoer, A.; Liu, T.; Mainieri, V.; Paolillo, M.; Rafferty, D. A.; Rosati, P.; Shemmer, O.; Silverman, J. D.; Smail, I.; Tozzi, P.; Vignali, C.

    2011-07-01

    faint flux levels uniquely accessible to the 4 Ms CDF-S. Near the center of the 4 Ms CDF-S (i.e., within an off-axis angle of 3'), the observed AGN and galaxy source densities have reached 9800+1300 - 1100 deg-2 and 6900+1100 - 900 deg-2, respectively. Simulations show that our main catalog is highly reliable and is reasonably complete. The mean backgrounds (corrected for vignetting and exposure-time variations) are 0.063 and 0.178 counts Ms-1 pixel-1 (for a pixel size of 0farcs492) for the soft and hard bands, respectively; the majority of the pixels have zero background counts. The 4 Ms CDF-S reaches on-axis flux limits of ≈3.2 × 10-17, 9.1 × 10-18, and 5.5 × 10-17 erg cm-2 s-1 for the full, soft, and hard bands, respectively. An increase in the CDF-S exposure time by a factor of ≈2-2.5 would provide further significant gains and probe key unexplored discovery space.

  10. THE CHANDRA DEEP FIELD-SOUTH SURVEY: 4 Ms SOURCE CATALOGS

    SciTech Connect

    Xue, Y. Q.; Luo, B.; Brandt, W. N.; Broos, P. S.; Schneider, D. P.; Bauer, F. E.; Lehmer, B. D.; Alexander, D. M.; Brusa, M.; Comastri, A.; Gilli, R.; Fabian, A. C.; Hasinger, G.; Hornschemeier, A. E.; Koekemoer, A.; Liu, T.; Mainieri, V.; Rosati, P.; Paolillo, M.; Rafferty, D. A.

    2011-07-01

    starburst galaxies at the very faint flux levels uniquely accessible to the 4 Ms CDF-S. Near the center of the 4 Ms CDF-S (i.e., within an off-axis angle of 3'), the observed AGN and galaxy source densities have reached 9800{sup +1300}{sub -1100} deg{sup -2} and 6900{sup +1100}{sub -900} deg{sup -2}, respectively. Simulations show that our main catalog is highly reliable and is reasonably complete. The mean backgrounds (corrected for vignetting and exposure-time variations) are 0.063 and 0.178 counts Ms{sup -1} pixel{sup -1} (for a pixel size of 0.''492) for the soft and hard bands, respectively; the majority of the pixels have zero background counts. The 4 Ms CDF-S reaches on-axis flux limits of {approx}3.2 x 10{sup -17}, 9.1 x 10{sup -18}, and 5.5 x 10{sup -17} erg cm{sup -2} s{sup -1} for the full, soft, and hard bands, respectively. An increase in the CDF-S exposure time by a factor of {approx}2-2.5 would provide further significant gains and probe key unexplored discovery space.

  11. A catalog of the mouse gut metagenome.

    PubMed

    Xiao, Liang; Feng, Qiang; Liang, Suisha; Sonne, Si Brask; Xia, Zhongkui; Qiu, Xinmin; Li, Xiaoping; Long, Hua; Zhang, Jianfeng; Zhang, Dongya; Liu, Chuan; Fang, Zhiwei; Chou, Joyce; Glanville, Jacob; Hao, Qin; Kotowska, Dorota; Colding, Camilla; Licht, Tine Rask; Wu, Donghai; Yu, Jun; Sung, Joseph Jao Yiu; Liang, Qiaoyi; Li, Junhua; Jia, Huijue; Lan, Zhou; Tremaroli, Valentina; Dworzynski, Piotr; Nielsen, H Bjørn; Bäckhed, Fredrik; Doré, Joël; Le Chatelier, Emmanuelle; Ehrlich, S Dusko; Lin, John C; Arumugam, Manimozhiyan; Wang, Jun; Madsen, Lise; Kristiansen, Karsten

    2015-10-01

    We established a catalog of the mouse gut metagenome comprising ∼2.6 million nonredundant genes by sequencing DNA from fecal samples of 184 mice. To secure high microbiome diversity, we used mouse strains of diverse genetic backgrounds, from different providers, kept in different housing laboratories and fed either a low-fat or high-fat diet. Similar to the human gut microbiome, >99% of the cataloged genes are bacterial. We identified 541 metagenomic species and defined a core set of 26 metagenomic species found in 95% of the mice. The mouse gut microbiome is functionally similar to its human counterpart, with 95.2% of its Kyoto Encyclopedia of Genes and Genomes (KEGG) orthologous groups in common. However, only 4.0% of the mouse gut microbial genes were shared (95% identity, 90% coverage) with those of the human gut microbiome. This catalog provides a useful reference for future studies. PMID:26414350

  12. Query driven visualization of astronomical catalogs

    NASA Astrophysics Data System (ADS)

    Buddelmeijer, Hugo; Valentijn, Edwin A.

    2013-01-01

    Interactive visualization of astronomical catalogs requires novel techniques due to the huge volumes and complex structure of the data produced by existing and upcoming astronomical surveys. The creation as well as the disclosure of the catalogs can be handled by data pulling mechanisms (Buddelmeijer et al. 2011). These prevent unnecessary processing and facilitate data sharing by having users request the desired end products. In this work we present query driven visualization as a logical continuation of data pulling. Scientists can request catalogs in a declarative way and set process parameters directly from within the visualization. This results in profound interoperation between software with a high level of abstraction. New messages for the Simple Application Messaging Protocol are proposed to achieve this abstraction. Support for these messages are implemented in the Astro-WISE information system and in a set of demonstrational applications.

  13. VizieR Online Data Catalog: OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)

    NASA Astrophysics Data System (ADS)

    Wyrzykowski, L.; Udalski, A.; Kubiak, M.; Szymanski, M. K.; Zebrun, K.; Soszinski, I.; Wozniak, P. R.; Pietrzynski, G.; Szewczyk, O.

    2009-03-01

    We present new version of the OGLE-II catalog of eclipsing binary stars detected in the Small Magellanic Cloud, based on Difference Image Analysis catalog of variable stars in the Magellanic Clouds containing data collected from 1997 to 2000. We found 1351 eclipsing binary stars in the central 2.4 square degree area of the SMC. 455 stars are newly discovered objects, not found in the previous release of the catalog. The eclipsing objects were selected with the automatic search algorithm based on the artificial neural network. The full catalog with individual photometry is accessible from the OGLE INTERNET archive, at ftp://sirius.astrouw.edu.pl/ogle/ogle2/var_stars/smc/ecl . Regular observations of the SMC fields started on June 26, 1997 and covered about 2.4 square degrees of central parts of the SMC. Reductions of the photometric data collected up to the end of May 2000 were performed with the Difference Image Analysis (DIA) package. (1 data file).

  14. Completion of Population of and Quality Assurance on the Nuclear Fuel Cycle Options Catalog.

    SciTech Connect

    Price, Laura L.; Barela, Amanda Crystal; Walkow, Walter M.; Schetnan, Richard Reed; Arnold, Matthew Brian

    2015-12-01

    An Evaluation and Screening team supporting the Fuel Cycle Technologies Program Office of the United States Department of Energy, Office of Nuclear Energy is conducting an evaluation and screening of a comprehensive set of fuel cycle options. These options have been assigned to one of 40 evaluation groups, each of which has a representative fuel cycle option [Todosow 2013]. A Fuel Cycle Data Package System Datasheet has been prepared for each representative fuel cycle option to ensure that the technical information used in the evaluation is high-quality and traceable [Kim, et al., 2013]. The information contained in the Fuel Cycle Data Packages has been entered into the Nuclear Fuel Cycle Options Catalog at Sandia National Laboratories so that it is accessible by the evaluation and screening team and other interested parties. In addition, an independent team at Savannah River National Laboratory has verified that the information has been entered into the catalog correctly. This report documents that the 40 representative fuel cycle options have been entered into the Catalog, and that the data entered into the catalog for the 40 representative options has been entered correctly.

  15. The Fermi Large Area Telescope Third Gamma-ray Source Catalog

    NASA Astrophysics Data System (ADS)

    Ferrara, Elizabeth C.; Ballet, Jean; Cavazzuti, Elisabetta; Digel, Seth

    2015-08-01

    We present an overview of the third Fermi Large Area Telescope source catalog (3FGL) of sources in the 100 MeV - 300 GeV range. Based on the first four years of science data from the Fermi Gamma-ray Space Telescope mission, it covers the entire sky, and is the deepest yet in this energy range. The 3FGL catalog provides source localizations, broad-band spectral fits, spectral energy distributions, and light curves with 1-month binning for all 3033 sources. In addition, it includes likely multiwavelength counterparts for roughtly two-thirds of the sources, with the remaining third having no clear associations with known gamma-ray-producing objects. More than 1100 of the identified or associated sources have blazar or other AGN counterparts, and a large fraction of these are variable in gamma rays. In addition, a number of 3FGL sources are pulsars or supernova remnants, and sources with counterparts at very high energies (TeV) are flagged. The catalog, supporting data products used for its creation, visualization tools, and important caveats are publicly available through the Fermi Science Support Center: http://fermi.gsfc.nasa.gov/ssc/data/access/lat/4yr_catalog/.

  16. The first AGILE low-energy (< 30 MeV) Terrestrial Gamma-ray Flashes catalog

    NASA Astrophysics Data System (ADS)

    Marisaldi, Martino; Fuschino, Fabio; Pittori, Carlotta; Verrecchia, Francesco; Giommi, Paolo; Tavani, Marco; Dietrich, Stefano; Price, Colin; Argan, Andrea; Labanti, Claudio; Galli, Marcello; Longo, Francesco; Del Monte, Ettore; Barbiellini, Guido; Giuliani, Andrea; Bulgarelli, Andrea; Gianotti, Fulvio; Trifoglio, Massimo; Trois, Alessio

    2014-05-01

    We present the first catalog of Terrestrial Gamma-ray Flashes (TGFs) detected by the Minicalorimeter (MCAL) instrument on-board the AGILE satellite. The catalog includes 308 TGFs detected during the period March 2009 - July 2012 in the +/- 2.5° latitude band and selected to have the maximum photon energy up to 30 MeV. The characteristics of the AGILE events are analysed and compared to the observational framework established by the two other currently active missions capable of detecting TGFs from space, RHESSI and Fermi. A detailed model of the MCAL dead time is presented, which is fundamental to properly interpret our observations, particularly concerning duration, intensity and correlation with lightning sferics detected by the World Wide Lightning Location Network. The TGFs cumulative spectrum supports a low production altitude, in agreement with previous measurements. The AGILE TGF catalog below 30 MeV is publicly accessible online at the website of the ASI Science Data Center (ASDC) http://www.asdc.asi.it/mcaltgfcat/ In addition to the TGF sample properties we also present the catalog website functionalities available to users.

  17. Metal Hydride and Alkali Halide Opacities in Extrasolar Giant Planets and Cool Stellar Atmospheres

    NASA Technical Reports Server (NTRS)

    Weck, Philippe F.; Stancil, Phillip C.; Kirby, Kate; Schweitzer, Andreas; Hauschildt, Peter H.

    2006-01-01

    The lack of accurate and complete molecular line and continuum opacity data has been a serious limitation to developing atmospheric models of cool stars and Extrasolar Giant Planets (EGPs). We report our recent calculations of molecular opacities resulting from the presence of metal hydrides and alkali halides. The resulting data have been included in the PHOENIX stellar atmosphere code (Hauschildt & Baron 1999). The new models, calculated using spherical geometry for all gravities considered, also incorporate our latest database of nearly 670 million molecular lines, and updated equations of state.

  18. Corneal Opacity in a Participant of a 161-km Mountain Bike Race at High Altitude.

    PubMed

    Khodaee, Morteza; Torres, David R

    2016-06-01

    Visual dysfunction is a relatively uncommon complaint among athletes during ultraendurance races. The pathophysiology of most of these cases is unknown. Corneal opacity has been speculated as the etiology for most of reported cases. We are presenting a case of a 56-year-old man with a partial unilateral corneal opacity and edema at kilometer 150 of a 161-km mountain bike race in high altitude. He was not able to finish the race (12-hour cutoff) because of his visual symptoms. He completely recovered in 3 days with no sequelae. PMID:27095539

  19. Intense ion beams as a tool for opacity measurements in warm dense matter

    SciTech Connect

    Abdallah, Joseph; Tauschwiz, An; Jacoby, J; Maruhn, J A; Novikov, V G; Tauschwitz, A; Onkels, E; Wittle, K; Rosmej, F B; Schott, R

    2009-01-01

    Opacity measurements in warm dense matter (WDM) provide a valuable benchmark for the diverging theoretical models in this regime. Heating of thin foils with intense heavy-ion beams allows one to create isolated samples of warm dense matter suitable for experimental determination of frequency-dependent opacities. A prerequisite for the measurements is the isothermal expansion of the heated foil. Hydrodynamic simulations predict that this condition is fulfilled. The analysis shows that existing ion-beam accelerators are capable to contribute to this field of research.

  20. [Corneal opacity in a contact lens wearer on hemodialysis for renal failure].

    PubMed

    Peter, S; Mestel, S; Thaler, M; Reichart, E; Mennel, S

    2012-01-01

    A 53-year-old contact lens wearer on renal dialysis developed visual impairment due to corneal opacity. The opacity was of a crystalline type and diffusely scattered in the anterior cornea. As oxalosis was suspected ascorbic acid was immediately omitted from the dialysis treatment schedule. Within a few weeks the visual acuity recovered and the corneas became nearly clear. The cornea is an uncommon manifestation site for oxalosis. Nevertheless, one should be aware of this possible sign for oxalosis, which can be a life-threatening complication of treatment with high dose ascorbic acid. PMID:21956749