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Sample records for information retrieval pittsburgh

  1. Information Retrieval.

    ERIC Educational Resources Information Center

    National Archives and Records Service (GSA), Washington, DC. Office of the National Archives.

    It is the purpose of this handbook to provide managers and their assistants with guidelines for determining where new information processing systems (dissemination, storage and retrieval) might profitably be employed in Government offices and with criteria for selecting the right methods and equipment. While the main objective is to encourage…

  2. Interaction Information Retrieval.

    ERIC Educational Resources Information Center

    Dominich, Sandor

    1994-01-01

    Discussion of information retrieval focuses on an Interaction Information Retrieval model in which documents are interconnected; queries and documents are treated in the same way; and retrieval is the result of the interconnection between query and documents. A theoretical mathematical formulation of this type of retrieval is given. (Contains 31…

  3. Connectionist Interaction Information Retrieval.

    ERIC Educational Resources Information Center

    Dominich, Sandor

    2003-01-01

    Discussion of connectionist views for adaptive clustering in information retrieval focuses on a connectionist clustering technique and activation spreading-based information retrieval model using the interaction information retrieval method. Presents theoretical as well as simulation results as regards computational complexity and includes…

  4. Connectionist Interaction Information Retrieval.

    ERIC Educational Resources Information Center

    Dominich, Sandor

    2003-01-01

    Discussion of connectionist views for adaptive clustering in information retrieval focuses on a connectionist clustering technique and activation spreading-based information retrieval model using the interaction information retrieval method. Presents theoretical as well as simulation results as regards computational complexity and includes…

  5. Microfilm and Information Retrieval.

    ERIC Educational Resources Information Center

    Teplitz, Arthur

    This paper was prepared to provide a frame of reference to the role of microfilm within the information retrieval world and to provide an opportunity for evaluation of the use of microforms for active retrieval applications. The paper discusses the principles of information retrieval, considers subject and classification indexing, and describes…

  6. Information Retrieval System.

    ERIC Educational Resources Information Center

    Mahle, Jack D., Jr.

    The Fort Detrick Information Retrieval System is a system of computer programs written in COBOL for a CDC 3150 to store and retrieve information about the scientific and technical reports and documents of the Fort Detrick Technical Library. The documents and reports have been abstracted and indexed. This abstract, the subject matter descriptors,…

  7. Natural Language Information Retrieval.

    ERIC Educational Resources Information Center

    Strzalkowski, Tomek

    1995-01-01

    Describes an information retrieval system in which advanced natural language processing is used to enhance the effectiveness of term-based document retrieval by preprocessing the documents; discovering interterm dependencies and build a conceptual hierarchy specific to database domain; and processing the user's natural language requests into…

  8. Information retrieval system

    NASA Technical Reports Server (NTRS)

    Berg, R. F.; Holcomb, J. E.; Kelroy, E. A.; Levine, D. A.; Mee, C., III

    1970-01-01

    Generalized information storage and retrieval system capable of generating and maintaining a file, gathering statistics, sorting output, and generating final reports for output is reviewed. File generation and file maintenance programs written for the system are general purpose routines.

  9. Retrieving Patent Information Online

    ERIC Educational Resources Information Center

    Kaback, Stuart M.

    1978-01-01

    This paper discusses patent information retrieval from online files in terms of types of questions, file contents, coverage, timeliness, and other file variations. CLAIMS, Derwent, WPI, APIPAT and Chemical Abstracts Service are described. (KP)

  10. Retrieving Patent Information Online

    ERIC Educational Resources Information Center

    Kaback, Stuart M.

    1978-01-01

    This paper discusses patent information retrieval from online files in terms of types of questions, file contents, coverage, timeliness, and other file variations. CLAIMS, Derwent, WPI, APIPAT and Chemical Abstracts Service are described. (KP)

  11. Topological Aspects of Information Retrieval.

    ERIC Educational Resources Information Center

    Egghe, Leo; Rousseau, Ronald

    1998-01-01

    Discusses topological aspects of theoretical information retrieval, including retrieval topology; similarity topology; pseudo-metric topology; document spaces as topological spaces; Boolean information retrieval as a subsystem of any topological system; and proofs of theorems. (LRW)

  12. Information Retrieval in Physics.

    ERIC Educational Resources Information Center

    Herschman, Arthur

    Discussed in this paper are the information problems in physics and the current program of the American Institute of Physics (AIP) being conducted in an attempt to develop an information retrieval system. The seriousness of the need is described by means of graphs indicating the exponential rise in the number of physics publications in the last…

  13. Information Retrieval Techniques.

    ERIC Educational Resources Information Center

    Kantor, Paul B.

    1994-01-01

    Identifies current trends in the automation of indexing, of information retrieval, and of interaction between the system and the users. Topics discussed include location, navigation, and indexing; digital libraries; matching documents to queries; weight of concepts; query structure, including fuzzy sets; algorithms; stemming; clustering; users'…

  14. Feedback in Information Retrieval.

    ERIC Educational Resources Information Center

    Spink, Amanda; Losee, Robert M.

    1996-01-01

    As Information Retrieval (IR) has evolved, it has become a highly interactive process, rooted in cognitive and situational contexts. Consequently the traditional cybernetic-based IR model does not suffice for interactive IR or the human approach to IR. Reviews different views of feedback in IR and their relationship to cybernetic and social…

  15. Music Information Retrieval.

    ERIC Educational Resources Information Center

    Downie, J. Stephen

    2003-01-01

    Identifies MIR (Music Information Retrieval) computer system problems, historic influences, current state-of-the-art, and future MIR solutions through an examination of the multidisciplinary approach to MIR. Highlights include pitch; temporal factors; harmonics; tone; editorial, textual, and bibliographic facets; multicultural factors; locating…

  16. Collaborative Information Retrieval.

    ERIC Educational Resources Information Center

    Bruce, Harry; Fidel, Raya

    1999-01-01

    Researchers from the University of Washington, Microsoft Research, Boeing, and Risoe National Laboratory in Denmark have embarked on a project to explore the manifestations of Collaborative Information Retrieval (CIR) in work settings and to propose technological innovations and organizational changes that can support, facilitate, and improve CIR.…

  17. Statistical Information Retrieval System.

    ERIC Educational Resources Information Center

    DiFondi, Nicholas M.

    An information retrieval system was developed using technical word occurrences as a basis for classification. A set of words, designated a vocabulary, was selected from the middle range of frequency listing of words occurring in an experimental sample of 94 documents. The selection produced 115 non-function words with technical definition that did…

  18. Language Processing in Information Retrieval.

    ERIC Educational Resources Information Center

    Doszkocs, Tamase

    1986-01-01

    Examines role and contributions of natural-language processing in information retrieval and artificial intelligence research in context of large operational information retrieval systems and services. State-of-the-art information retrieval systems combining the functional capabilities of conventional inverted file term adjacency approach with…

  19. A Visual Information Retrieval Tool.

    ERIC Educational Resources Information Center

    Zhang, Jin

    2000-01-01

    Discussion of visualization for information retrieval, that transforms unseen internal semantic representation of a document collection into visible geometric displays, focuses on DARE (Distance Angle Retrieval Environment). Highlights include expression of information need; interpretation and manipulation of information retrieval models; ranking…

  20. Semantic processing in information retrieval.

    PubMed Central

    Rindflesch, T. C.; Aronson, A. R.

    1993-01-01

    Intuition suggests that one way to enhance the information retrieval process would be the use of phrases to characterize the contents of text. A number of researchers, however, have noted that phrases alone do not improve retrieval effectiveness. In this paper we briefly review the use of phrases in information retrieval and then suggest extensions to this paradigm using semantic information. We claim that semantic processing, which can be viewed as expressing relations between the concepts represented by phrases, will in fact enhance retrieval effectiveness. The availability of the UMLS domain model, which we exploit extensively, significantly contributes to the feasibility of this processing. PMID:8130547

  1. Student Attitude Toward Information Retrieval.

    ERIC Educational Resources Information Center

    Adair, Charles H.; Allen, Rodney F.

    This is an individually administered rating scale designed to evaluate teacher trainee attitudes toward an information retrieval system. A major goal of the scale is to seek responses that measure students' reactions to the cognitive interest and motivational nature of the information retrieval system through the use of Likert-type items. The…

  2. Intelligent Information Retrieval: An Introduction.

    ERIC Educational Resources Information Center

    Gauch, Susan

    1992-01-01

    Discusses the application of artificial intelligence to online information retrieval systems and describes several systems: (1) CANSEARCH, from MEDLINE; (2) Intelligent Interface for Information Retrieval (I3R); (3) Gausch's Query Reformulation; (4) Environmental Pollution Expert (EP-X); (5) PLEXUS (gardening); and (6) SCISOR (corporate…

  3. Information Retrieval by Television.

    ERIC Educational Resources Information Center

    Billowes, C. A.

    1968-01-01

    Bell Canada, the Public School and Collegiate Institute Boards of Ottawa, and the Ontario Institute for Studies in Education are collaborating on an educational television project which will provide a retrieval system that can supply any given program at any time under the control of the classroom teacher. Four schools in Ottawa will participate…

  4. Information Retrieval by Television.

    ERIC Educational Resources Information Center

    Billowes, C. A.

    1968-01-01

    Bell Canada, the Public School and Collegiate Institute Boards of Ottawa, and the Ontario Institute for Studies in Education are collaborating on an educational television project which will provide a retrieval system that can supply any given program at any time under the control of the classroom teacher. Four schools in Ottawa will participate…

  5. Information retrieval for patient care.

    PubMed Central

    Gardner, M.

    1997-01-01

    Doctors need clinical information during most consultations with patients, and much of this need could be satisfied by material from online sources. Advances in data communication technologies mean that multimedia information can be transported rapidly to various clinical care locations. However, selecting the few items of information likely to be useful in a particular clinical situation from the mass of information available is a major problem. Current information retrieval systems are designed primarily for use in research rather than clinical care. The design, implementation, and critical evaluation of new information retrieval systems for clinical care should be guided by knowledgeable clinical users. PMID:9099122

  6. Mobile medical visual information retrieval.

    PubMed

    Depeursinge, Adrien; Duc, Samuel; Eggel, Ivan; Müller, Henning

    2012-01-01

    In this paper, we propose mobile access to peer-reviewed medical information based on textual search and content-based visual image retrieval. Web-based interfaces designed for limited screen space were developed to query via web services a medical information retrieval engine optimizing the amount of data to be transferred in wireless form. Visual and textual retrieval engines with state-of-the-art performance were integrated. Results obtained show a good usability of the software. Future use in clinical environments has the potential of increasing quality of patient care through bedside access to the medical literature in context.

  7. Seymour: Maryland's Information Retriever.

    ERIC Educational Resources Information Center

    Smith, Barbara G.

    1994-01-01

    Explains the development of an electronic information network in Maryland called Seymour that offers bibliographic records; full-text databases; community information databases; the ability to request information and materials; local, state, and federal information; and access to the Internet. Policy issues are addressed, including user fees and…

  8. INFORMATION RETRIEVAL EXPERIMENT. FINAL REPORT.

    ERIC Educational Resources Information Center

    SELYE, HANS

    THIS REPORT IS A BRIEF REVIEW OF RESULTS OF AN EXPERIMENT TO DETERMINE THE INFORMATION RETRIEVAL EFFICIENCY OF A MANUAL SPECIALIZED INFORMATION SYSTEM BASED ON 700,000 DOCUMENTS IN THE FIELDS OF ENDOCRINOLOGY, STRESS, MAST CELLS, AND ANAPHYLACTOID REACTIONS. THE SYSTEM RECEIVES 30,000 PUBLICATIONS ANNUALLY. DETAILED INFORMATION IS REPRESENTED BY…

  9. Multimedia Information Retrieval Literature Review

    SciTech Connect

    Wong, Pak C.; Bohn, Shawn J.; Payne, Deborah A.

    2010-10-12

    This survey paper highlights some of the recent, influential work in multimedia information retrieval (MIR). MIR is a branch area of multimedia (MM). The young and fast-growing area has received strong industrial and academic support in the United States and around the world (see Section 7 for a list of major conferences and journals of the community). The term "information retrieval" may be misleading to those with different computer science or information technology backgrounds. As shown in our discussion later, it indeed includes topics from user interaction, data analytics, machine learning, feature extraction, information visualization, and more.

  10. Electronic Information Retrieval.

    ERIC Educational Resources Information Center

    Holzberg, Carol S.

    1989-01-01

    Discusses ways in which online searching promotes the development of research, computer, and critical thinking skills, and reviews two databases that offer access to information on elementary school science. Lesson activities for grades four through six are suggested, and information on the vendor, system requirements, and cost of each database is…

  11. A Web Information Retrieval System

    NASA Astrophysics Data System (ADS)

    Kim, Tae-Hyun; Park, Dong-Chul; Huh, Woong; Kim, Hyen-Ug; Yoon, Chung-Hwa; Park, Chong-Dae; Woo, Dong-Min; Jeong, Taikyeong; Cho, Il-Hwan; Lee, Yunsik

    An approach for the retrieval of price information from internet sites is applied to real-world application problems in this paper. The Web Information Retrieval System (WIRS) utilizes Hidden Markov Model (HMM) for its powerful capability to process temporal information. HMM is an extremely flexible tool and has been successfully applied to a wide variety of stochastic modeling tasks. In order to compare the prices and features of products from various web sites, the WIRS extracts prices and descriptions of various products within web pages. The WIRS is evaluated with real-world problems and compared with a conventional method and the result is reported in this paper.

  12. Information Retrieval for Ecological Syntheses

    ERIC Educational Resources Information Center

    Bayliss, Helen R.; Beyer, Fiona R.

    2015-01-01

    Research syntheses are increasingly being conducted within the fields of ecology and environmental management. Information retrieval is crucial in any synthesis in identifying data for inclusion whilst potentially reducing biases in the dataset gathered, yet the nature of ecological information provides several challenges when compared with…

  13. Information Retrieval for Ecological Syntheses

    ERIC Educational Resources Information Center

    Bayliss, Helen R.; Beyer, Fiona R.

    2015-01-01

    Research syntheses are increasingly being conducted within the fields of ecology and environmental management. Information retrieval is crucial in any synthesis in identifying data for inclusion whilst potentially reducing biases in the dataset gathered, yet the nature of ecological information provides several challenges when compared with…

  14. The Ecosystem of Information Retrieval

    ERIC Educational Resources Information Center

    Rodriguez-Munoz, Jose-Vicente; Martinez-Mendez, Francisco-Javier; Pastor-Sanchez, Juan-Antonio

    2012-01-01

    Introduction: This paper presents an initial proposal for a formal framework that, by studying the metric variables involved in information retrieval, can establish the sequence of events involved and how to perform it. Method: A systematic approach from the equations of Shannon and Weaver to establish the decidability of information retrieval…

  15. Information Retrieval in the Classroom.

    ERIC Educational Resources Information Center

    Oley, Elizabeth

    1989-01-01

    Explores aspects of information retrieval skills such as end user training, indexing, controlled vocabulary systems, search protocol, boolean logic, problem analysis, and decision making. Suggests techniques for classroom instruction using simulations of online databases, CD-ROMs, and DIALOG's classroom instruction program. Describes several…

  16. Semantic Tools in Information Retrieval.

    ERIC Educational Resources Information Center

    Rubinoff, Morris; Stone, Don C.

    This report discusses the problem of the meansings of words used in information retrieval systems, and shows how semantic tools can aid in the communication which takes place between indexers and searchers via index terms. After treating the differing use of semantic tools in different types of systems, two tools (classification tables and…

  17. Information Retrieval in the Classroom.

    ERIC Educational Resources Information Center

    Oley, Elizabeth

    1989-01-01

    Explores aspects of information retrieval skills such as end user training, indexing, controlled vocabulary systems, search protocol, boolean logic, problem analysis, and decision making. Suggests techniques for classroom instruction using simulations of online databases, CD-ROMs, and DIALOG's classroom instruction program. Describes several…

  18. Information Retrieval in Virtual Universities

    ERIC Educational Resources Information Center

    Puustjärvi, Juha; Pöyry, Päivi

    2006-01-01

    Information retrieval in the context of virtual universities deals with the representation, organization, and access to learning objects. The representation and organization of learning objects should provide the learner with an easy access to the learning objects. In this article, we give an overview of the ONES system, and analyze the relevance…

  19. Relational Thesauri in Information Retrieval.

    ERIC Educational Resources Information Center

    Wang, Yih-Chen; Vandendorpe, James

    1985-01-01

    Describes design and development of a thesaurus based on lexical-semantic relations, and compares results of experiments with queries enhanced using thesauri based on several different groups of relations against performance with original queries run on IRS information retrieval system developed at Illinois Institute of Technology. Twenty-one…

  20. Information retrieval for ecological syntheses.

    PubMed

    Bayliss, Helen R; Beyer, Fiona R

    2015-06-01

    Research syntheses are increasingly being conducted within the fields of ecology and environmental management. Information retrieval is crucial in any synthesis in identifying data for inclusion whilst potentially reducing biases in the dataset gathered, yet the nature of ecological information provides several challenges when compared with medicine that should be considered when planning and undertaking searches. We present ten recommendations for anyone considering undertaking information retrieval for ecological research syntheses that highlight the main differences with medicine and, if adopted, may help reduce biases in the dataset retrieved, increase search efficiency and improve reporting standards. They are as follows: (1) plan for information retrieval at an early stage, (2) identify and use sources of help, (3) clearly define the question to be addressed, (4) ensure that provisions for managing, recording and reporting the search are in place, (5) select an appropriate search type, (6) identify sources to be used, (7) identify limitations of the sources, (8) ensure that the search vocabulary is appropriate, (9) identify limits and filters that can help direct the search, and (10) test the strategy to ensure that it is realistic and manageable. These recommendations may be of value for other disciplines where search infrastructures are not yet sufficiently well developed. Copyright © 2014 John Wiley & Sons, Ltd.

  1. Information Retrieval in Virtual Universities

    ERIC Educational Resources Information Center

    Puustjärvi, Juha; Pöyry, Päivi

    2006-01-01

    Information retrieval in the context of virtual universities deals with the representation, organization, and access to learning objects. The representation and organization of learning objects should provide the learner with an easy access to the learning objects. In this article, we give an overview of the ONES system, and analyze the relevance…

  2. Cross-Language Information Retrieval.

    ERIC Educational Resources Information Center

    Oard, Douglas W.; Diekema, Anne R.

    1998-01-01

    Reviews research and practice in cross-language information retrieval (CLIR) that seeks to support the process of finding documents written in one natural language with automated systems that can accept queries expressed in other languages. Addresses user needs, document preprocessing, query formulation, matching strategies, sources of translation…

  3. Automated information retrieval using CLIPS

    NASA Technical Reports Server (NTRS)

    Raines, Rodney Doyle, III; Beug, James Lewis

    1991-01-01

    Expert systems have considerable potential to assist computer users in managing the large volume of information available to them. One possible use of an expert system is to model the information retrieval interests of a human user and then make recommendations to the user as to articles of interest. At Cal Poly, a prototype expert system written in the C Language Integrated Production System (CLIPS) serves as an Automated Information Retrieval System (AIRS). AIRS monitors a user's reading preferences, develops a profile of the user, and then evaluates items returned from the information base. When prompted by the user, AIRS returns a list of items of interest to the user. In order to minimize the impact on system resources, AIRS is designed to run in the background during periods of light system use.

  4. Topic Models in Information Retrieval

    DTIC Science & Technology

    2007-08-01

    the combination: Hidden Markov Model. Miller et al. (1999) presented a Hidden Markov Model ( HMM ) Information Retrieval system. They take the...combination with different methods to estimate the combination weights. The parameter estimation in the HMM framework is simplified with strict...applied a Hidden Markov Model ( HMM ) framework; Zhai and Lafferty (2002) and Cao et al. (2005) used Expectation Maximization (EM) on the mixture

  5. Ethics, genomics, and information retrieval.

    PubMed

    Goodman, K W

    1996-05-01

    The union of genomics and computational information retrieval raises a number of ethical issues, including data sharing, database accuracy, group and subgroup stigma, and privacy and confidentiality. These issues are introduced and assigned a preliminary analysis which, it is hoped, may be of use in more sustained efforts to identify issues, solutions and potential guidelines, to stimulate education, and to strike the most appropriate balance between the rights of individuals and the needs of researchers and society.

  6. Information Retrieval in Medicine: The SAPHIRE Experience.

    ERIC Educational Resources Information Center

    Hersh, William R.; Hickam, David

    1995-01-01

    Describes the SAPHIRE (Semantic and Probabilistic Heuristic Information Retrieval Environment) that was developed to identify optimal approaches to indexing, retrieval, and evaluation of information retrieval systems in the biomedical domain. Six evaluation studies that have been done with SAPHIRE are summarized and future challenges are…

  7. Intelligent Information Retrieval Using Rough Set Approximations.

    ERIC Educational Resources Information Center

    Srinivasan, Padmini

    1989-01-01

    Describes rough sets theory and discusses the advantages it offers for information retrieval, including the implicit inclusion of Boolean logic, term weighting, ranked retrieval output, and relevance feedback. Rough set formalism is compared to Boolean, vector, and fuzzy models of information retrieval and a small scale evaluation of rough sets is…

  8. Intelligent Information Retrieval Using Rough Set Approximations.

    ERIC Educational Resources Information Center

    Srinivasan, Padmini

    1989-01-01

    Describes rough sets theory and discusses the advantages it offers for information retrieval, including the implicit inclusion of Boolean logic, term weighting, ranked retrieval output, and relevance feedback. Rough set formalism is compared to Boolean, vector, and fuzzy models of information retrieval and a small scale evaluation of rough sets is…

  9. Biomedical information retrieval across languages.

    PubMed

    Daumke, Philipp; Markü, Kornél; Poprat, Michael; Schulz, Stefan; Klar, Rüdiger

    2007-06-01

    This work presents a new dictionary-based approach to biomedical cross-language information retrieval (CLIR) that addresses many of the general and domain-specific challenges in current CLIR research. Our method is based on a multilingual lexicon that was generated partly manually and partly automatically, and currently covers six European languages. It contains morphologically meaningful word fragments, termed subwords. Using subwords instead of entire words significantly reduces the number of lexical entries necessary to sufficiently cover a specific language and domain. Mediation between queries and documents is based on these subwords as well as on lists of word-n-grams that are generated from large monolingual corpora and constitute possible translation units. The translations are then sent to a standard Internet search engine. This process makes our approach an effective tool for searching the biomedical content of the World Wide Web in different languages. We evaluate this approach using the OHSUMED corpus, a large medical document collection, within a cross-language retrieval setting.

  10. EFFECTIVENESS OF INFORMATION RETRIEVAL METHODS.

    ERIC Educational Resources Information Center

    SWETS, JOHN A.

    RESULTS OF FIFTY DIFFERENT RETRIEVAL METHODS AS APPLIED IN THREE EXPERIMENTAL RETRIEVAL SYSTEMS WERE SUBJECTED TO AN ANALYSIS SUGGESTED BY STATISTICAL DECISION THEORY. THE ANALYSIS USES A PREVIOUSLY-PROPOSED MEASURE OF EFFECTIVENESS AND DEMONSTRATES ITS SEVERAL PROPERTIES. SOME OF THESE PROPERTIES ARE--(1) IT ENABLES THE RETRIEVAL SYSTEM TO…

  11. Information retrieval from black holes

    NASA Astrophysics Data System (ADS)

    Lochan, Kinjalk; Chakraborty, Sumanta; Padmanabhan, T.

    2016-08-01

    It is generally believed that, when matter collapses to form a black hole, the complete information about the initial state of the matter cannot be retrieved by future asymptotic observers, through local measurements. This is contrary to the expectation from a unitary evolution in quantum theory and leads to (a version of) the black hole information paradox. Classically, nothing else, apart from mass, charge, and angular momentum is expected to be revealed to such asymptotic observers after the formation of a black hole. Semiclassically, black holes evaporate after their formation through the Hawking radiation. The dominant part of the radiation is expected to be thermal and hence one cannot know anything about the initial data from the resultant radiation. However, there can be sources of distortions which make the radiation nonthermal. Although the distortions are not strong enough to make the evolution unitary, these distortions carry some part of information regarding the in-state. In this work, we show how one can decipher the information about the in-state of the field from these distortions. We show that the distortions of a particular kind—which we call nonvacuum distortions—can be used to fully reconstruct the initial data. The asymptotic observer can do this operationally by measuring certain well-defined observables of the quantum field at late times. We demonstrate that a general class of in-states encode all their information content in the correlation of late time out-going modes. Further, using a 1 +1 dimensional dilatonic black hole model to accommodate backreaction self-consistently, we show that observers can also infer and track the information content about the initial data, during the course of evaporation, unambiguously. Implications of such information extraction are discussed.

  12. A Logic Basis for Information Retrieval.

    ERIC Educational Resources Information Center

    Watters, C. R.; Shepherd, M. A.

    1987-01-01

    Discusses the potential of recent work in artificial intelligence, especially expert systems, for the development of more effective information retrieval systems. Highlights include the role of an expert bibliographic retrieval system and a prototype expert retrieval system, PROBIB-2, that uses MicroProlog to provide deductive reasoning…

  13. A Unified Mathematical Definition of Classical Information Retrieval.

    ERIC Educational Resources Information Center

    Dominich, Sandor

    2000-01-01

    Presents a unified mathematical definition for the classical models of information retrieval and identifies a mathematical structure behind relevance feedback. Highlights include vector information retrieval; probabilistic information retrieval; and similarity information retrieval. (Contains 118 references.) (Author/LRW)

  14. A Unified Mathematical Definition of Classical Information Retrieval.

    ERIC Educational Resources Information Center

    Dominich, Sandor

    2000-01-01

    Presents a unified mathematical definition for the classical models of information retrieval and identifies a mathematical structure behind relevance feedback. Highlights include vector information retrieval; probabilistic information retrieval; and similarity information retrieval. (Contains 118 references.) (Author/LRW)

  15. Organizing, Indexing, and Retrieving Information.

    ERIC Educational Resources Information Center

    Fidel, Raya

    1989-01-01

    Reviews the literature that examines new capabilities and new problems associated with online catalogs, online searching of bibliographic databases, indexing, full text retrieval, and expert systems. The need for research that focuses on individual needs and that adopts an integrated approach which views indexing and retrieval as interrelated…

  16. Vocabulary Control for Information Retrieval.

    ERIC Educational Resources Information Center

    Lancaster, F. W.

    This book deals with properties of vocabularies for indexing and searching document collections; the construction, organization, display, and maintenance of these vocabularies; and the vocabulary as a factor affecting the performance of retrieval systems. Most of the text is concerned with vocabularies for post-coordinate retrieval systems, with…

  17. Using Induction to Refine Information Retrieval Strategies

    NASA Technical Reports Server (NTRS)

    Baudin, Catherine; Pell, Barney; Kedar, Smadar

    1994-01-01

    Conceptual information retrieval systems use structured document indices, domain knowledge and a set of heuristic retrieval strategies to match user queries with a set of indices describing the document's content. Such retrieval strategies increase the set of relevant documents retrieved (increase recall), but at the expense of returning additional irrelevant documents (decrease precision). Usually in conceptual information retrieval systems this tradeoff is managed by hand and with difficulty. This paper discusses ways of managing this tradeoff by the application of standard induction algorithms to refine the retrieval strategies in an engineering design domain. We gathered examples of query/retrieval pairs during the system's operation using feedback from a user on the retrieved information. We then fed these examples to the induction algorithm and generated decision trees that refine the existing set of retrieval strategies. We found that (1) induction improved the precision on a set of queries generated by another user, without a significant loss in recall, and (2) in an interactive mode, the decision trees pointed out flaws in the retrieval and indexing knowledge and suggested ways to refine the retrieval strategies.

  18. Using Induction to Refine Information Retrieval Strategies

    NASA Technical Reports Server (NTRS)

    Baudin, Catherine; Pell, Barney; Kedar, Smadar

    1994-01-01

    Conceptual information retrieval systems use structured document indices, domain knowledge and a set of heuristic retrieval strategies to match user queries with a set of indices describing the document's content. Such retrieval strategies increase the set of relevant documents retrieved (increase recall), but at the expense of returning additional irrelevant documents (decrease precision). Usually in conceptual information retrieval systems this tradeoff is managed by hand and with difficulty. This paper discusses ways of managing this tradeoff by the application of standard induction algorithms to refine the retrieval strategies in an engineering design domain. We gathered examples of query/retrieval pairs during the system's operation using feedback from a user on the retrieved information. We then fed these examples to the induction algorithm and generated decision trees that refine the existing set of retrieval strategies. We found that (1) induction improved the precision on a set of queries generated by another user, without a significant loss in recall, and (2) in an interactive mode, the decision trees pointed out flaws in the retrieval and indexing knowledge and suggested ways to refine the retrieval strategies.

  19. Automatic Classification in Information Retrieval.

    ERIC Educational Resources Information Center

    van Rijsbergen, C. J.

    1978-01-01

    Addresses the application of automatic classification methods to the problems associated with computerized document retrieval. Different kinds of classifications are described, and both document and term clustering methods are discussed. References and notes are provided. (Author/JD)

  20. Information Retrieval beyond the Text Document.

    ERIC Educational Resources Information Center

    Rui, Yong; Ortega, Michael; Huang, Thomas S.; Mehrotra, Sharad

    1999-01-01

    Reports some of the progress made over the years toward exploring information beyond the text domain. Describes the Multimedia Analysis and Retrieval Systems (MARS), developed to increase access to non-textual information. Addresses the following aspects of MARS: (1) visual feature extraction; (2) retrieval models; (3) query reformulation…

  1. Advanced Feedback Methods in Information Retrieval.

    ERIC Educational Resources Information Center

    Salton, G.; And Others

    1985-01-01

    In this study, automatic feedback techniques are applied to Boolean query statements in online information retrieval to generate improved query statements based on information contained in previously retrieved documents. Feedback operations are carried out using conventional Boolean logic and extended logic. Experimental output is included to…

  2. Expert Systems and Intelligent Information Retrieval.

    ERIC Educational Resources Information Center

    Brooks, H. M.

    1987-01-01

    Explores what an intelligent information retrieval system involves and why expert system techniques might interest system designers. Expert systems research is reviewed with emphasis on components, architecture, and computer interaction, and it is concluded that information retrieval is not an ideal problem domain for expert system application at…

  3. Relation of Resemblance in Information Retrieval.

    ERIC Educational Resources Information Center

    Pietilainen, Pirkko

    1982-01-01

    Presents a method for using the amount of semantic information in search-query terms as a weighting factor in constructing a fuzzy relation of resemblance between retrieved items in information retrieval online. Two tables, two figures, and a reference list accompany the text. (Author/JL)

  4. Information Retrieval beyond the Text Document.

    ERIC Educational Resources Information Center

    Rui, Yong; Ortega, Michael; Huang, Thomas S.; Mehrotra, Sharad

    1999-01-01

    Reports some of the progress made over the years toward exploring information beyond the text domain. Describes the Multimedia Analysis and Retrieval Systems (MARS), developed to increase access to non-textual information. Addresses the following aspects of MARS: (1) visual feature extraction; (2) retrieval models; (3) query reformulation…

  5. Experiments in Multi-Lingual Information Retrieval.

    ERIC Educational Resources Information Center

    Salton, Gerard

    A comparison was made of the performance in an automatic information retrieval environment of user queries and document abstracts available in natural language form in both English and French. The results obtained indicate that the automatic indexing and retrieval techniques actually used appear equally effective in handling the query and document…

  6. Information Retrieval and the Philosophy of Language.

    ERIC Educational Resources Information Center

    Blair, David C.

    2003-01-01

    Provides an overview of some of the main ideas in the philosophy of language that have relevance to the issues of information retrieval, focusing on the description of the intellectual content. Highlights include retrieval problems; recall and precision; words and meanings; context; externalism and the philosophy of language; and scaffolding and…

  7. Information Retrieval and the Philosophy of Language.

    ERIC Educational Resources Information Center

    Blair, David C.

    2003-01-01

    Provides an overview of some of the main ideas in the philosophy of language that have relevance to the issues of information retrieval, focusing on the description of the intellectual content. Highlights include retrieval problems; recall and precision; words and meanings; context; externalism and the philosophy of language; and scaffolding and…

  8. Information Retrieval in Education - A Worthy Tradition?

    ERIC Educational Resources Information Center

    Irving, Ann

    1982-01-01

    Because information handling applies to all forms of learning, one Microelectronics Education Programme (MEP) INSET strategy is devoted to a discussion of the generation, storage, retrieval, communication, and use of information in all subject areas. Discusses the nature of information; MEP and the information domain; information gathering, use,…

  9. Symposium on Human-Computer Information Retrieval.

    PubMed

    Tunkelang, Daniel; Capra, Robert; Golovchinsky, Gene; Kules, Bill; Smith, Catherine; White, Ryen

    2013-03-01

    Human-computer information retrieval (HCIR) is the study of information retrieval techniques that integrate human intelligence and algorithmic search to help people explore, understand, and use information. Since 2007, we have held an annual gathering of researchers and practitioners to advance the state of the art in this field. This meeting report summarizes the history of the HCIR symposium and emphasizes its relevance to the data science community.

  10. Computerized Information Storage and Retrieval Systems.

    ERIC Educational Resources Information Center

    Azubuike, Abraham A.; Umoh, Jackson S.

    1988-01-01

    Describes the concept of maximum indexing, a system aimed at achieving maximum recall and maximum precision in computerized information retrieval. The indexing strategies used to achieve maximum indexing and the problems that arise are discussed. (9 references) (CLB)

  11. Web information retrieval based on ontology

    NASA Astrophysics Data System (ADS)

    Zhang, Jian

    2013-03-01

    The purpose of the Information Retrieval (IR) is to find a set of documents that are relevant for a specific information need of a user. Traditional Information Retrieval model commonly used in commercial search engine is based on keyword indexing system and Boolean logic queries. One big drawback of traditional information retrieval is that they typically retrieve information without an explicitly defined domain of interest to the users so that a lot of no relevance information returns to users, which burden the user to pick up useful answer from these no relevance results. In order to tackle this issue, many semantic web information retrieval models have been proposed recently. The main advantage of Semantic Web is to enhance search mechanisms with the use of Ontology's mechanisms. In this paper, we present our approach to personalize web search engine based on ontology. In addition, key techniques are also discussed in our paper. Compared to previous research, our works concentrate on the semantic similarity and the whole process including query submission and information annotation.

  12. Activities of information retrieval in Daicel Corporation : The roles and efforts of information retrieval team

    NASA Astrophysics Data System (ADS)

    Yamazaki, Towako

    In order to stabilize and improve quality of information retrieval service, the information retrieval team of Daicel Corporation has given some efforts on standard operating procedures, interview sheet for information retrieval, structured format for search report, and search expressions for some technological fields of Daicel. These activities and efforts will also lead to skill sharing and skill tradition between searchers. In addition, skill improvements are needed not only for a searcher individually, but also for the information retrieval team totally when playing searcher's new roles.

  13. Information retrieval using a "digital book shelf".

    PubMed Central

    Frisse, M. E.; Cousins, S. B.; Hassan, S. W.

    1991-01-01

    WALT (Washington University's Approach to Lots of Text), is a prototype interface designed to support information retrieval research. The WALT interface serves as a "front end" to a wide array of retrieval engines including those based on Boolean retrieval, latent semantic indexing, term frequency--inverse document frequency, and Bayesian inference techniques. The WALT interface is composed of seven distinct components: a document examination component known as the Document Browsing Area; four navigation components called the Book Shelf, the Book Spine, the Table of Contents, and the Path Clipboard; a term-based information retrieval component called Control Panel; and a relevance feedback component known as the Reader Feedback Panel. WALT's most unique feature may be it's use of "book shelf" and "book spine" metaphors both to facilitate navigation and to provide a histogram-based display showing documents deemed appropriate for answering user queries. PMID:1807717

  14. Exploiting salient semantic analysis for information retrieval

    NASA Astrophysics Data System (ADS)

    Luo, Jing; Meng, Bo; Quan, Changqin; Tu, Xinhui

    2016-11-01

    Recently, many Wikipedia-based methods have been proposed to improve the performance of different natural language processing (NLP) tasks, such as semantic relatedness computation, text classification and information retrieval. Among these methods, salient semantic analysis (SSA) has been proven to be an effective way to generate conceptual representation for words or documents. However, its feasibility and effectiveness in information retrieval is mostly unknown. In this paper, we study how to efficiently use SSA to improve the information retrieval performance, and propose a SSA-based retrieval method under the language model framework. First, SSA model is adopted to build conceptual representations for documents and queries. Then, these conceptual representations and the bag-of-words (BOW) representations can be used in combination to estimate the language models of queries and documents. The proposed method is evaluated on several standard text retrieval conference (TREC) collections. Experiment results on standard TREC collections show the proposed models consistently outperform the existing Wikipedia-based retrieval methods.

  15. Health Information Retrieval Tool (HIRT)

    PubMed Central

    Nyun, Mra Thinzar; Ogunyemi, Omolola; Zeng, Qing

    2002-01-01

    The World Wide Web (WWW) is a powerful way to deliver on-line health information, but one major problem limits its value to consumers: content is highly distributed, while relevant and high quality information is often difficult to find. To address this issue, we experimented with an approach that utilizes three-dimensional anatomic models in conjunction with free-text search.

  16. Information Retrieval as a Network Application.

    ERIC Educational Resources Information Center

    Lynch, Clifford A.

    1990-01-01

    Describes the function of the Open Systems Interconnection (OSI) Z39.50 protocol, which allows for construction of information "servers"--i.e., resources attached to a computer communications network that can be accessed by client machines to retrieve information. The relationship of Z39.5 to other OSI protocols is explained. (23…

  17. AEROMETRIC INFORMATION RETRIEVAL SYSTEM (AIRS) - GRAPHICS

    EPA Science Inventory

    Aerometric Information Retrieval System (AIRS) is a computer-based repository of information about airborne pollution in the United States and various World Health Organization (WHO) member countries. AIRS is administered by the U.S. Environmental Protection Agency, and runs on t...

  18. Teaching a Heuristic Approach to Information Retrieval.

    ERIC Educational Resources Information Center

    Ury, Connie Jo; And Others

    1997-01-01

    Discusses lifelong learning and the need for information retrieval skills, and describes how Northwest Missouri State University incorporates a heuristic model of library instruction in which students continually evaluate and refine information-seeking practices while progressing through all levels of courses in diverse disciplines. (Author/LRW)

  19. Guidelines for Teachers of Online Information Retrieval.

    ERIC Educational Resources Information Center

    Wood, F. E.

    These guidelines are intended to provide realistic and practical guidance about the options available to teachers and planners of education and training programs wholly or partly concerned with online information retrieval, particularly those in academic departments of library and information studies. Seven sections address: (1) the aims and scope…

  20. AEROMETRIC INFORMATION RETRIEVAL SYSTEM (AIRS) - GRAPHICS

    EPA Science Inventory

    Aerometric Information Retrieval System (AIRS) is a computer-based repository of information about airborne pollution in the United States and various World Health Organization (WHO) member countries. AIRS is administered by the U.S. Environmental Protection Agency, and runs on t...

  1. Guidelines for Teachers of Online Information Retrieval.

    ERIC Educational Resources Information Center

    Wood, F. E.

    These guidelines are intended to provide realistic and practical guidance about the options available to teachers and planners of education and training programs wholly or partly concerned with online information retrieval, particularly those in academic departments of library and information studies. Seven sections address: (1) the aims and scope…

  2. Speech information retrieval: a review

    SciTech Connect

    Hafen, Ryan P.; Henry, Michael J.

    2012-11-01

    Audio is an information-rich component of multimedia. Information can be extracted from audio in a number of different ways, and thus there are several established audio signal analysis research fields. These fields include speech recognition, speaker recognition, audio segmentation and classification, and audio finger-printing. The information that can be extracted from tools and methods developed in these fields can greatly enhance multimedia systems. In this paper, we present the current state of research in each of the major audio analysis fields. The goal is to introduce enough back-ground for someone new in the field to quickly gain high-level understanding and to provide direction for further study.

  3. BIRS - Bioterrorism Information Retrieval System.

    PubMed

    Tewari, Ashish Kumar; Rashi; Wadhwa, Gulshan; Sharma, Sanjeev Kumar; Jain, Chakresh Kumar

    2013-01-01

    Bioterrorism is the intended use of pathogenic strains of microbes to widen terror in a population. There is a definite need to promote research for development of vaccines, therapeutics and diagnostic methods as a part of preparedness to any bioterror attack in the future. BIRS is an open-access database of collective information on the organisms related to bioterrorism. The architecture of database utilizes the current open-source technology viz PHP ver 5.3.19, MySQL and IIS server under windows platform for database designing. Database stores information on literature, generic- information and unique pathways of about 10 microorganisms involved in bioterrorism. This may serve as a collective repository to accelerate the drug discovery and vaccines designing process against such bioterrorist agents (microbes). The available data has been validated from various online resources and literature mining in order to provide the user with a comprehensive information system. The database is freely available at http://www.bioterrorism.biowaves.org.

  4. A Personalized Health Information Retrieval System

    PubMed Central

    Wang, Yunli; Liu, Zhenkai

    2005-01-01

    Consumers face barriers when seeking health information on the Internet. A Personalized Health Information Retrieval System (PHIRS) is proposed to recommend health information for consumers. The system consists of four modules: (1) User modeling module captures user’s preference and health interests; (2) Automatic quality filtering module identifies high quality health information; (3) Automatic text difficulty rating module classifies health information into professional or patient educational materials; and (4) User profile matching module tailors health information for individuals. The initial results show that PHIRS could assist consumers with simple search strategies. PMID:16779435

  5. Automatic information retrieval of Chinese business card

    NASA Astrophysics Data System (ADS)

    Shi, GuangShun; Pan, Wumo; Jin, Jianming

    2003-01-01

    Document image understanding techniques have been widely used in many application domains. Various kinds of documents have been researched and different methods are developed for information retrieval purpose. In this paper we present a practical method to extract information items from Chinese business card. Before retrieval information in business card, the image of business card had been segmented into little text regions and each text region had been recognized. Because the typeset of business card is variable, and both English and Chinese characters are used, so there are errors in segmentation and recognition result. We focus on building a robust model that can tolerate errors and extract syntax pattern of each text lines in business card, which using both layout information and logical information. By this model, many errors will be identified and adjusted. Finally, correct property will be assigned to each text region in business card, and recognition errors will be corrected.

  6. A Context Vector Model for Information Retrieval.

    ERIC Educational Resources Information Center

    Billhardt, Holger; Borrajo, Daniel; Maojo, Victor

    2002-01-01

    Presents an indexing and information retrieval method that, based on the vector space model, incorporates term dependencies and thus obtains semantically richer representations of documents. Highlights include term context vectors; techniques for estimating the dependencies among terms; term weights; experimental results on four text collections;…

  7. Introduction to Data Transmission for Information Retrieval

    ERIC Educational Resources Information Center

    Kallenbach, P. A.

    1975-01-01

    An introduction is presented to data transmission technology and networks for information retrieval purposes. Data signals are analyzed, modulation techniques are discussed, communication procedures between terminals and the central processing unit are surveyed, and possible network configurations are considered. (Author/PF)

  8. Strategies for Building Distributed Information Retrieval Systems.

    ERIC Educational Resources Information Center

    Macleod, Ian A.; And Others

    1987-01-01

    Discussion of the need for distributed information retrieval systems focuses on a model system, Fulcrum FUL/Text. Differences from distributed database management systems are described; system design is discussed; implementation requirements are explained including remote operation calls (ROC's); and a prototype simulation model based on FUL/Text…

  9. Retrieving Information from a Hierarchical Plan

    ERIC Educational Resources Information Center

    Schneider, Darryl W.; Logan, Gordon D.

    2007-01-01

    Plans give structure to behavior by specifying whether and when different tasks must be performed. However, the structure of behavior need not mirror the structure of the plan. To investigate this idea, the authors studied how plan information is retrieved in the context of a novel sequence-position cuing procedure, wherein subjects memorize two…

  10. Millennial Students' Mental Models of Information Retrieval

    ERIC Educational Resources Information Center

    Holman, Lucy

    2009-01-01

    This qualitative study examines first-year college students' online search habits in order to identify patterns in millennials' mental models of information retrieval. The study employed a combination of modified contextual inquiry and concept mapping methodologies to elicit students' mental models. The researcher confirmed previously observed…

  11. Teaching Fifth Graders Electronic Information Retrieval Skills.

    ERIC Educational Resources Information Center

    Christy, Annette

    Fifth graders were taught to use an electronic card catalog to retrieve information and materials for class assignments and leisure reading materials. Groups of 10 or 12 students were seen twice a week for periods lasting up to 30 minutes. At these sessions they were introduced to computer components, proper handling, how to log into a network…

  12. Microcomputers for Information Storage and Retrieval.

    ERIC Educational Resources Information Center

    Kanters, Ben

    1983-01-01

    Report on use of the microcomputer for information storage and retrieval (ISR) notes hardware (floppy disks, keyboard, screen, printer); functions of ISR software; standardization of the operating system; database creation; data entry; indexing; search process; choice of ISR software package; software market and user; training and instruction; and…

  13. Introduction to Data Transmission for Information Retrieval

    ERIC Educational Resources Information Center

    Kallenbach, P. A.

    1975-01-01

    An introduction is presented to data transmission technology and networks for information retrieval purposes. Data signals are analyzed, modulation techniques are discussed, communication procedures between terminals and the central processing unit are surveyed, and possible network configurations are considered. (Author/PF)

  14. A Context Vector Model for Information Retrieval.

    ERIC Educational Resources Information Center

    Billhardt, Holger; Borrajo, Daniel; Maojo, Victor

    2002-01-01

    Presents an indexing and information retrieval method that, based on the vector space model, incorporates term dependencies and thus obtains semantically richer representations of documents. Highlights include term context vectors; techniques for estimating the dependencies among terms; term weights; experimental results on four text collections;…

  15. Millennial Students' Mental Models of Information Retrieval

    ERIC Educational Resources Information Center

    Holman, Lucy

    2009-01-01

    This qualitative study examines first-year college students' online search habits in order to identify patterns in millennials' mental models of information retrieval. The study employed a combination of modified contextual inquiry and concept mapping methodologies to elicit students' mental models. The researcher confirmed previously observed…

  16. Teaching Information Retrieval Using Telediscussion Techniques.

    ERIC Educational Resources Information Center

    Heiliger, Edward M.

    This paper concerns an experiment in teaching a graduate seminar on Information Retrieval using telediscussion techniques. Outstanding persons from Project INTREX, MEDLARS, Chemical Abstracts, the University of Georgia, the SUNY biomedical Network, AEC, NASA, and DDC gave hour-long telelectures. A Conference Telephone Set was used with success.…

  17. Docu/Master Information Retrieval System.

    ERIC Educational Resources Information Center

    Poor, William E.

    1987-01-01

    Describes an information storage and retrieval system for mainframe computer applications and its utilization as a corporate library catalog intended for end-user searching. The changeover from a previous system is discussed and current system features are evaluated. (Author/CLB)

  18. Multilevel resistive information storage and retrieval

    DOEpatents

    Lohn, Andrew; Mickel, Patrick R.

    2016-08-09

    The present invention relates to resistive random-access memory (RRAM or ReRAM) systems, as well as methods of employing multiple state variables to form degenerate states in such memory systems. The methods herein allow for precise write and read steps to form multiple state variables, and these steps can be performed electrically. Such an approach allows for multilevel, high density memory systems with enhanced information storage capacity and simplified information retrieval.

  19. Web information retrieval for health professionals.

    PubMed

    Ting, S L; See-To, Eric W K; Tse, Y K

    2013-06-01

    This paper presents a Web Information Retrieval System (WebIRS), which is designed to assist the healthcare professionals to obtain up-to-date medical knowledge and information via the World Wide Web (WWW). The system leverages the document classification and text summarization techniques to deliver the highly correlated medical information to the physicians. The system architecture of the proposed WebIRS is first discussed, and then a case study on an application of the proposed system in a Hong Kong medical organization is presented to illustrate the adoption process and a questionnaire is administrated to collect feedback on the operation and performance of WebIRS in comparison with conventional information retrieval in the WWW. A prototype system has been constructed and implemented on a trial basis in a medical organization. It has proven to be of benefit to healthcare professionals through its automatic functions in classification and summarizing the medical information that the physicians needed and interested. The results of the case study show that with the use of the proposed WebIRS, significant reduction of searching time and effort, with retrieval of highly relevant materials can be attained.

  20. Electronic publishing and intelligent information retrieval

    NASA Technical Reports Server (NTRS)

    Heck, A.

    1992-01-01

    Europeans are now taking steps to homogenize policies and standardize procedures in electronic publishing (EP) in astronomy and space sciences. This arose from an open meeting organized in Oct. 1991 at Strasbourg Observatory (France) and another business meeting held late Mar. 1992 with the major publishers and journal editors in astronomy and space sciences. The ultimate aim of EP might be considered as the so-called 'intelligent information retrieval' (IIR) or better named 'advanced information retrieval' (AIR), taking advantage of the fact that the material to be published appears at some stage in a machine-readable form. It is obvious that the combination of desktop and electronic publishing with networking and new structuring of knowledge bases will profoundly reshape not only our ways of publishing, but also our procedures of communicating and retrieving information. It should be noted that a world-wide survey among astronomers and space scientists carried out before the October 1991 colloquium on the various packages and machines used, indicated that TEX-related packages were already in majoritarian use in our community. It has also been stressed at each meeting that the European developments should be carried out in collaboration with what is done in the US (STELLAR project, for instance). American scientists and journal editors actually attended both meetings mentioned above. The paper will offer a review of the status of electronic publishing in astronomy and its possible contribution to advanced information retrieval in this field. It will also report on recent meetings such as the 'Astronomy from Large Databases-2 (ALD-2)' conference dealing with the latest developments in networking, in data, information, and knowledge bases, as well as in the related methodologies.

  1. The Oklahoma Geographic Information Retrieval System

    NASA Technical Reports Server (NTRS)

    Blanchard, W. A.

    1982-01-01

    The Oklahoma Geographic Information Retrieval System (OGIRS) is a highly interactive data entry, storage, manipulation, and display software system for use with geographically referenced data. Although originally developed for a project concerned with coal strip mine reclamation, OGIRS is capable of handling any geographically referenced data for a variety of natural resource management applications. A special effort has been made to integrate remotely sensed data into the information system. The timeliness and synoptic coverage of satellite data are particularly useful attributes for inclusion into the geographic information system.

  2. Online information retrieval systems and health professionals.

    PubMed

    Lialiou, Pascalina; Mantas, John

    2014-01-01

    The following paper presents a scientific contribution that explores the clinicians' use of online information retrieval systems for their clinical decision making. Particularly, the research focuses on the ability of doctors and nurses in seeking information through MEDLINE and ScienceDirect. The research process took place by an electronic form consisted of five clinical scenarios and an evaluation sheet. The results testify that only a small percent of clinicians use the recommended electronic bibliographic databasesand take the right clinical decision to the scenarios. Health professionals have to be educated in information searching and take advantage from the provided literature taking more useful and reliable answers on their clinical questions.

  3. Users guide for information retrieval using APL

    NASA Technical Reports Server (NTRS)

    Shapiro, A.

    1974-01-01

    A Programming Language (APL) is a precise, concise, and powerful computer programming language. Several features make APL useful to managers and other potential computer users. APL is interactive; therefore, the user can communicate with his program or data base in near real-time. This, coupled with the fact that APL has excellent debugging features, reduces program checkout time to minutes or hours rather than days or months. Of particular importance is the fact that APL can be utilized as a management science tool using such techniques as operations research, statistical analysis, and forecasting. The gap between the scientist and the manager could be narrowed by showing how APL can be used to do what the scientists and the manager each need to do, retrieve information. Sometimes, the information needs to be retrieved rapidly. In this case APL is ideally suited for this challenge.

  4. Natural language information retrieval in digital libraries

    SciTech Connect

    Strzalkowski, T.; Perez-Carballo, J.; Marinescu, M.

    1996-12-31

    In this paper we report on some recent developments in joint NYU and GE natural language information retrieval system. The main characteristic of this system is the use of advanced natural language processing to enhance the effectiveness of term-based document retrieval. The system is designed around a traditional statistical backbone consisting of the indexer module, which builds inverted index files from pre-processed documents, and a retrieval engine which searches and ranks the documents in response to user queries. Natural language processing is used to (1) preprocess the documents in order to extract content-carrying terms, (2) discover inter-term dependencies and build a conceptual hierarchy specific to the database domain, and (3) process user`s natural language requests into effective search queries. This system has been used in NIST-sponsored Text Retrieval Conferences (TREC), where we worked with approximately 3.3 GBytes of text articles including material from the Wall Street Journal, the Associated Press newswire, the Federal Register, Ziff Communications`s Computer Library, Department of Energy abstracts, U.S. Patents and the San Jose Mercury News, totaling more than 500 million words of English. The system have been designed to facilitate its scalability to deal with ever increasing amounts of data. In particular, a randomized index-splitting mechanism has been installed which allows the system to create a number of smaller indexes that can be independently and efficiently searched.

  5. Interactive information retrieval systems with minimalist representation

    SciTech Connect

    Domeshek, E.; Kedar, S.; Gordon, A.

    1996-12-31

    Almost any information you might want is becoming available on-line. The problem is how to find what you need. One strategy to improve access to existing information sources, is intelligent information agents - an approach based on extensive representation and inference. Another alternative is to simply concentrate on better information organization and indexing. Our systems use a form of conceptual indexing sensitive to users` task-specific information needs. We aim for minimalist representation, coding only select aspects of stored items. Rather than supporting reliable automated inference, the primary purpose of our representations is to provide sufficient discrimination and guidance to a user for a given domain and task. This paper argues, using case studies, that minimal representations can make strong contributions to the usefulness and usability of interactive information systems, while minimizing knowledge engineering effort. We demonstrate this approach in several broad spectrum applications including video retrieval and advisory systems.

  6. NLP Meets the Jabberwocky: Natural Language Processing in Information Retrieval.

    ERIC Educational Resources Information Center

    Feldman, Susan

    1999-01-01

    Focuses on natural language processing (NLP) in information retrieval. Defines the seven levels at which people extract meaning from text/spoken language. Discusses the stages of information processing; how an information retrieval system works; advantages to adding full NLP to information retrieval systems; and common problems with information…

  7. Data Visualization in Information Retrieval and Data Mining (SIG VIS).

    ERIC Educational Resources Information Center

    Efthimiadis, Efthimis

    2000-01-01

    Presents abstracts that discuss using data visualization for information retrieval and data mining, including immersive information space and spatial metaphors; spatial data using multi-dimensional matrices with maps; TREC (Text Retrieval Conference) experiments; users' information needs in cartographic information retrieval; and users' relevance…

  8. NLP Meets the Jabberwocky: Natural Language Processing in Information Retrieval.

    ERIC Educational Resources Information Center

    Feldman, Susan

    1999-01-01

    Focuses on natural language processing (NLP) in information retrieval. Defines the seven levels at which people extract meaning from text/spoken language. Discusses the stages of information processing; how an information retrieval system works; advantages to adding full NLP to information retrieval systems; and common problems with information…

  9. Data Visualization in Information Retrieval and Data Mining (SIG VIS).

    ERIC Educational Resources Information Center

    Efthimiadis, Efthimis

    2000-01-01

    Presents abstracts that discuss using data visualization for information retrieval and data mining, including immersive information space and spatial metaphors; spatial data using multi-dimensional matrices with maps; TREC (Text Retrieval Conference) experiments; users' information needs in cartographic information retrieval; and users' relevance…

  10. Geosemantic Information Retrieval Using a Geoontology

    NASA Astrophysics Data System (ADS)

    Hwang, J.

    2014-12-01

    Currently, most users prefer searching for the information using the more convenient and dynamic mobile information retrieval services to using the existing desktop PC services in the limited space, according as a lot of mobile terminals have been provided with the development of a variety of techniques. Information retrieval service using the mobile terminals has the strength that provides the personalized information results related to the users' information request anytime and anywhere, considering the users' mobility and portability. Therefore, for the information retrieval using the mobile devices I need the context awareness techniques which have been researched actively. In this thesis, I developed the context awareness ontology model for Geotourism as the representative method of the context awareness techniques to predict the user's interest and foresee the information about which retrieval results and which places the user want to get. The proposed Geotour ontology model is extended and designed from W3C Time Ontology defined in the international standards and spatial geometry feature ontology supported by OGC GeoSPARQL, so it can provide the usability and the function. That is, GeotourFeature class is the subclass of ogc:Feature defined in OGC as in Figure 1. GeotourTime class which is for expressing temporal information of a certain Geotour features is the subclass of TemporalThing of W3C. Figure 1: Relationship between the international standard ontology and the geotour ontology model A Geotour features and a geotour map describes a part of ontology to represent the GeotourFeature composed of GeotourTime class and GeotourLocation class. The highest class to represent GeotourTime and GeotourLocation is GeotourFeature class. As mentioned in the previous section, our model inherited the temporal ontology of W3C. Figure 2 describes a part of ontology to represent the GeotourFeature composed of GeotourTime class and GeotourLocation class. The highest class

  11. Retrieving information from a hierarchical plan.

    PubMed

    Schneider, Darryl W; Logan, Gordon D

    2007-11-01

    Plans give structure to behavior by specifying whether and when different tasks must be performed. However, the structure of behavior need not mirror the structure of the plan. To investigate this idea, the authors studied how plan information is retrieved in the context of a novel sequence-position cuing procedure, wherein subjects memorize two task sequences, then perform trials on which they are randomly cued to perform a task at one of the serial positions in a sequence. Several empirical effects were consistent with retrieval from a hierarchically structured representation (but not a non-hierarchical representation), including large sequence-repetition benefits, position-repetition benefits only for sequence repetitions, and a lack of robust task-repetition benefits. The data were successfully modeled by assuming that retrieval was time-consuming, susceptible to priming, cue-dependent, structurally constrained, and token-specific. In tandem, the empirical data and modeling work provide deeper insight into the representation of and access to information in memory that comprises a plan for guiding behavior.

  12. The Use of Semantic Links in Hypertext Information Retrieval.

    ERIC Educational Resources Information Center

    Frei, H. P.; Stieger, D.

    1995-01-01

    Highlights semantic links and shows how the semantic content of hypertext links can be used for information retrieval. Discussion includes indexing and retrieval algorithms that exploit link content and node content; retrieval strategies exploiting semantic links, including conventional retrieval and constrained spreading activation techniques;…

  13. Trends in Research on Information Retrieval--The Potential for Improvements in Conventional Boolean Retrieval Systems.

    ERIC Educational Resources Information Center

    Radecki, Tadeusz

    1988-01-01

    Discusses the inability of the standard Boolean logic model of information retrieval to deal effectively with the inherent fallibility of retrieval decisions. Recent advances in information retrieval research are reviewed, and their practical potential for overcoming the deficiencies of the Boolean model is examined. (45 references) (Author/CLB)

  14. Towards new measures of information retrieval evaluation.

    PubMed Central

    Hersh, W. R.; Elliot, D. L.; Hickam, D. H.; Wolf, S. L.; Molnar, A.; Leichtenstien, C.

    1994-01-01

    All of the methods currently used to assess information retrieval (IR) systems have limitations in their ability to measure how well users are able to acquire information. We utilized a new approach to assessing information obtained, based on a short-answer test given to senior medical students. Students took the ten-question test and then searched one of two IR systems on the five questions for which they were least certain of their answer Our results showed that pre-searching scores on the test were low but that searching yielded a high proportion of answers with both systems. These methods are able to measure information obtained, and will be used in subsequent studies to assess differences among IR systems. PMID:7950053

  15. Graph-Based Interactive Bibliographic Information Retrieval Systems

    ERIC Educational Resources Information Center

    Zhu, Yongjun

    2017-01-01

    In the big data era, we have witnessed the explosion of scholarly literature. This explosion has imposed challenges to the retrieval of bibliographic information. Retrieval of intended bibliographic information has become challenging due to the overwhelming search results returned by bibliographic information retrieval systems for given input…

  16. Information retrieval: an overview of system characteristics.

    PubMed

    Wiesman, F; Hasman, A; van den Herik, H J

    1997-11-01

    The paper gives an overview of characteristics of information retrieval (IR) systems. The characteristics are identified from the descriptions of 23 IR systems. Four IR models are discussed: the Boolean model, the vector model, the probabilistic model and the connectionistic model. Twelve other characteristics of IR models are identified: search intermediary, domain knowledge, relevance feedback, natural language interface, graphical query language, conceptual queries, full-text IR, field searching, fuzzy queries, hypertext integration, machine learning, and ranked output. Finally, the relevance of IR systems for the World Wide Web is established.

  17. Health consumer-oriented information retrieval.

    PubMed

    Claveau, Vincent; Hamon, Thierry; Le Maguer, Sébastien; Grabar, Natalia

    2015-01-01

    While patients can freely access their Electronic Health Records or online health information, they may not be able to correctly understand the content of these documents. One of the challenges is related to the difference between expert and non-expert languages. We propose to investigate this issue within the Information Retrieval field. The patient queries have to be associated with the corresponding expert documents, that provide trustworthy information. Our approach relies on a state-of-the-art IR system called Indri and on semantic resources. Different query expansion strategies are explored. Our system shows up to 0.6740 P@10, up to 0.7610 R@10, and up to 0.6793 NDCG@10.

  18. Enhancing genomics information retrieval through dimensional analysis.

    PubMed

    Hu, Qinmin; Huang, Jimmy Xiangji

    2013-06-01

    We propose a novel dimensional analysis approach to employing meta information in order to find the relationships within the unstructured or semi-structured document/passages for improving genomics information retrieval performance. First, we make use of the auxiliary information as three basic dimensions, namely "temporal", "journal", and "author". The reference section is treated as a commensurable quantity of the three basic dimensions. Then, the sample space and subspaces are built up and a set of events are defined to meet the basic requirement of dimensional homogeneity to be commensurable quantities. After that, the classic graph analysis algorithm in the Web environments is applied on each dimension respectively to calculate the importance of each dimension. Finally, we integrate all the dimension networks and re-rank the outputs for evaluation. Our experimental results show the proposed approach is superior and promising.

  19. The Use of a Context-Based Information Retrieval Technique

    DTIC Science & Technology

    2009-07-01

    information retrieval. For instance, information retrieval tools must contend with obstacles such as polysemy , which refers to words with multiple...meanings, and synonymy, which is used to describe multiple words with the same meaning. Many of these problems can be minimised when the query is...with the proportion of retrieved items that are relevant. Information retrieval systems aim to maximise both of these measures, and

  20. Phenotype Information Retrieval for Existing GWAS Studies.

    PubMed

    Alipanah, Neda; Lin, Ko-Wei; Venkatesh, Vinay; Farzaneh, Seena; Kim, Hyeon-Eui

    2013-01-01

    The database of Genotypes and Phenotypes (dbGaP) is archiving the results of different Genome Wide Association Studies (GWAS). dbGaP has a multitude of phenotype variables, but they are not harmonized across studies. We proposed a method to standardize phenotype variables by classifying similar variables based on semantic distances. We first extracted variables description, enriched them using domain knowledge, and computed the distances among them. We used clustering techniques to classify the most similar variables. We used domain experts to audit clusters, annotated the clusters with appropriate labels, and used re-clustering to build a semantically-driven Genotypes and Phenotypes (sdGaP) ontology using the UMLS semantic network and metathesaurus. The sdGaP ontology allowed us to expand user queries and retrieve information using a semantic metric called density measure (DM). We illustrated the potential improvement of information retrieval using the sdGaP ontology in one search scenario using the variables from the Cleveland Family Study.

  1. 46 CFR 520.6 - Retrieval of information.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 9 2012-10-01 2012-10-01 false Retrieval of information. 520.6 Section 520.6 Shipping FEDERAL MARITIME COMMISSION REGULATIONS AFFECTING OCEAN SHIPPING IN FOREIGN COMMERCE CARRIER AUTOMATED TARIFFS § 520.6 Retrieval of information. (a) General. Tariffs systems shall present retrievers with...

  2. 46 CFR 520.6 - Retrieval of information.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 9 2011-10-01 2011-10-01 false Retrieval of information. 520.6 Section 520.6 Shipping FEDERAL MARITIME COMMISSION REGULATIONS AFFECTING OCEAN SHIPPING IN FOREIGN COMMERCE CARRIER AUTOMATED TARIFFS § 520.6 Retrieval of information. (a) General. Tariffs systems shall present retrievers with...

  3. 46 CFR 520.6 - Retrieval of information.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 9 2010-10-01 2010-10-01 false Retrieval of information. 520.6 Section 520.6 Shipping FEDERAL MARITIME COMMISSION REGULATIONS AFFECTING OCEAN SHIPPING IN FOREIGN COMMERCE CARRIER AUTOMATED TARIFFS § 520.6 Retrieval of information. (a) General. Tariffs systems shall present retrievers with...

  4. 46 CFR 520.6 - Retrieval of information.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 9 2014-10-01 2014-10-01 false Retrieval of information. 520.6 Section 520.6 Shipping FEDERAL MARITIME COMMISSION REGULATIONS AFFECTING OCEAN SHIPPING IN FOREIGN COMMERCE CARRIER AUTOMATED TARIFFS § 520.6 Retrieval of information. (a) General. Tariffs systems shall present retrievers with...

  5. 46 CFR 520.6 - Retrieval of information.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 9 2013-10-01 2013-10-01 false Retrieval of information. 520.6 Section 520.6 Shipping FEDERAL MARITIME COMMISSION REGULATIONS AFFECTING OCEAN SHIPPING IN FOREIGN COMMERCE CARRIER AUTOMATED TARIFFS § 520.6 Retrieval of information. (a) General. Tariffs systems shall present retrievers with...

  6. Data Discretization for Novel Relationship Discovery in Information Retrieval.

    ERIC Educational Resources Information Center

    Benoit, G.

    2002-01-01

    Describes an information retrieval, visualization, and manipulation model which offers the user multiple ways to exploit the retrieval set, based on weighted query terms, via an interactive interface. Outlines the mathematical model and describes an information retrieval application built on the model to search structured and full-text files.…

  7. A STUDY OF THE FUNDAMENTALS OF INFORMATION STORAGE AND RETRIEVAL

    DTIC Science & Technology

    Contents: The problem of information storage and retrieval - data banking ; The nature of information and communication between minds; The five steps...of data banking ; A classification system for data banking processes; A partial analysis of the problem of retrieval; A retrieval solution; and Implementation of the solution.

  8. Data Discretization for Novel Relationship Discovery in Information Retrieval.

    ERIC Educational Resources Information Center

    Benoit, G.

    2002-01-01

    Describes an information retrieval, visualization, and manipulation model which offers the user multiple ways to exploit the retrieval set, based on weighted query terms, via an interactive interface. Outlines the mathematical model and describes an information retrieval application built on the model to search structured and full-text files.…

  9. ON THE THEORETICAL BASIS OF INFORMATION RETRIEVAL SYSTEMS.

    DTIC Science & Technology

    This report is an extensive survey of and commentary on research and developments in the fields of information retrieval and linguistics and the...applicability of results to the formulation of information retrieval languages and machine translation. Commentary is weighted toward imparting an...Real and putative relations which have been made between logic, linguistics, and information retrieval are explored in some detail. An extensive

  10. TOFIR: A Tool of Facilitating Information Retrieval - Introduce a Visual Retrieval Model.

    ERIC Educational Resources Information Center

    Zhang, Jin

    2001-01-01

    Introduces a new method for the visualization of information retrieval called TOFIR (Tool of Facilitating Information Retrieval). Discusses the use of angle attributes of a document to construct the angle-based visual space; two-dimensional and three-dimensional visual tools; ambiguity; and future research directions. (Author/LRW)

  11. A semantic medical multimedia retrieval approach using ontology information hiding.

    PubMed

    Guo, Kehua; Zhang, Shigeng

    2013-01-01

    Searching useful information from unstructured medical multimedia data has been a difficult problem in information retrieval. This paper reports an effective semantic medical multimedia retrieval approach which can reflect the users' query intent. Firstly, semantic annotations will be given to the multimedia documents in the medical multimedia database. Secondly, the ontology that represented semantic information will be hidden in the head of the multimedia documents. The main innovations of this approach are cross-type retrieval support and semantic information preservation. Experimental results indicate a good precision and efficiency of our approach for medical multimedia retrieval in comparison with some traditional approaches.

  12. A Semantic Medical Multimedia Retrieval Approach Using Ontology Information Hiding

    PubMed Central

    Guo, Kehua; Zhang, Shigeng

    2013-01-01

    Searching useful information from unstructured medical multimedia data has been a difficult problem in information retrieval. This paper reports an effective semantic medical multimedia retrieval approach which can reflect the users' query intent. Firstly, semantic annotations will be given to the multimedia documents in the medical multimedia database. Secondly, the ontology that represented semantic information will be hidden in the head of the multimedia documents. The main innovations of this approach are cross-type retrieval support and semantic information preservation. Experimental results indicate a good precision and efficiency of our approach for medical multimedia retrieval in comparison with some traditional approaches. PMID:24082915

  13. Multimodal medical information retrieval with unsupervised rank fusion.

    PubMed

    Mourão, André; Martins, Flávio; Magalhães, João

    2015-01-01

    Modern medical information retrieval systems are paramount to manage the insurmountable quantities of clinical data. These systems empower health care experts in the diagnosis of patients and play an important role in the clinical decision process. However, the ever-growing heterogeneous information generated in medical environments poses several challenges for retrieval systems. We propose a medical information retrieval system with support for multimodal medical case-based retrieval. The system supports medical information discovery by providing multimodal search, through a novel data fusion algorithm, and term suggestions from a medical thesaurus. Our search system compared favorably to other systems in 2013 ImageCLEFMedical. Copyright © 2014 Elsevier Ltd. All rights reserved.

  14. SPECIAL-PURPOSE DIGITAL COMPUTER FOR INFORMATION RETRIEVAL,

    DTIC Science & Technology

    DIGITAL COMPUTERS, * INFORMATION RETRIEVAL ), COMPUTERS, DATA STORAGE SYSTEMS, CORE STORAGE, MAGNETIC CORES, PUNCHED TAPE, MAGNETIC TAPE, SEARCH THEORY, INDEXES, VOCABULARY, CODING, RELIABILITY, CIRCUITS, USSR

  15. A Survey of Stemming Algorithms in Information Retrieval

    ERIC Educational Resources Information Center

    Moral, Cristian; de Antonio, Angélica; Imbert, Ricardo; Ramírez, Jaime

    2014-01-01

    Background: During the last fifty years, improved information retrieval techniques have become necessary because of the huge amount of information people have available, which continues to increase rapidly due to the use of new technologies and the Internet. Stemming is one of the processes that can improve information retrieval in terms of…

  16. Improving information retrieval in functional analysis.

    PubMed

    Rodriguez, Juan C; González, Germán A; Fresno, Cristóbal; Llera, Andrea S; Fernández, Elmer A

    2016-12-01

    Transcriptome analysis is essential to understand the mechanisms regulating key biological processes and functions. The first step usually consists of identifying candidate genes; to find out which pathways are affected by those genes, however, functional analysis (FA) is mandatory. The most frequently used strategies for this purpose are Gene Set and Singular Enrichment Analysis (GSEA and SEA) over Gene Ontology. Several statistical methods have been developed and compared in terms of computational efficiency and/or statistical appropriateness. However, whether their results are similar or complementary, the sensitivity to parameter settings, or possible bias in the analyzed terms has not been addressed so far. Here, two GSEA and four SEA methods and their parameter combinations were evaluated in six datasets by comparing two breast cancer subtypes with well-known differences in genetic background and patient outcomes. We show that GSEA and SEA lead to different results depending on the chosen statistic, model and/or parameters. Both approaches provide complementary results from a biological perspective. Hence, an Integrative Functional Analysis (IFA) tool is proposed to improve information retrieval in FA. It provides a common gene expression analytic framework that grants a comprehensive and coherent analysis. Only a minimal user parameter setting is required, since the best SEA/GSEA alternatives are integrated. IFA utility was demonstrated by evaluating four prostate cancer and the TCGA breast cancer microarray datasets, which showed its biological generalization capabilities. Copyright © 2016 Elsevier Ltd. All rights reserved.

  17. The Personalized Information Retrieval Model Based on User Interest

    NASA Astrophysics Data System (ADS)

    Gong, Songjie

    Personalized information retrieval systems can help customers to gain orientation in information overload by determining which items are relevant for their interests. One type of information retrieval is content-based filtering. In content-based filtering, items contain words in natural language. Meanings of words in natural language are often ambiguous. The problem of word meaning disambiguation is often decomposed to determining semantic similarity of words. In this paper, the architecture of personalized information retrieval based on user interest is presented. The architecture includes user interface model, user interest model, detecting interest model and update model. It established a user model for personalized information retrieval based on user interest keyword list on client server, which can supply personalized information retrieval service for user with the communications and collaboration of all modules of the architecture.

  18. The JPL Library Information Retrieval System

    ERIC Educational Resources Information Center

    Walsh, Josephine

    1975-01-01

    The development, capabilities, and products of the computer-based retrieval system of the Jet Propulsion Laboratory Library are described. The system handles books and documents, produces a book catalog, and provides a machine search capability. (Author)

  19. Information content of ozone retrieval algorithms

    NASA Technical Reports Server (NTRS)

    Rodgers, C.; Bhartia, P. K.; Chu, W. P.; Curran, R.; Deluisi, J.; Gille, J. C.; Hudson, R.; Mateer, C.; Rusch, D.; Thomas, R. J.

    1989-01-01

    The algorithms are characterized that were used for production processing by the major suppliers of ozone data to show quantitatively: how the retrieved profile is related to the actual profile (This characterizes the altitude range and vertical resolution of the data); the nature of systematic errors in the retrieved profiles, including their vertical structure and relation to uncertain instrumental parameters; how trends in the real ozone are reflected in trends in the retrieved ozone profile; and how trends in other quantities (both instrumental and atmospheric) might appear as trends in the ozone profile. No serious deficiencies were found in the algorithms used in generating the major available ozone data sets. As the measurements are all indirect in someway, and the retrieved profiles have different characteristics, data from different instruments are not directly comparable.

  20. Information retrieval from solar occultation experiments

    NASA Astrophysics Data System (ADS)

    Cox, Helen M.

    Over the past two decades NASA has invested billions of dollars in the development, launch and operation of satellites in a quest to understand and monitor the atmosphere and its changes. As scientists interpret this data with the aid of sophisticated models there is a drive to measure an ever-increasing number of atmospheric properties and constituents. There is however a Emit to the amount of information which can be gained by remote- sensing methods because of the physical nature of these experiments. In this dissertation limitations on the information content of solar occultation experiments, employed to monitor the vertical distribution of stratospheric aerosols and gases for the past twenty years, are evaluated and presented. Solar extinction recorded at wavelengths employed primarily for measuring gas densities inevitably includes a contribution from aerosols, whose spectral scattering behaviour depends on their unknown size distribution. There is a high degree of linear dependence between aerosol extinction measurements at different wavelengths which limits their information content but provides a convenient means for separating aerosol and gas contributions to total measured extinction. Relationships are determined to extract the aerosol contribution from the total extinction at the centres of broadband gas channels. A bias is identified in the current SAGE II aerosol and ozone separation scheme such that under background conditions retrieved ozone concentrations are shown to be biased low by several percent, whereas in post-volcanic periods they are biased high. This shifting bias has introduced an apparent downward trend in SAGE II lower stratospheric ozone concentrations throughout the 1980s as the aerosol size distribution has evolved during a post-volcanic recovery period. Although linear dependence between multi-wavelength aerosol extinction measurements is advantageous for the spectral interpolation of the data, it is detrimental to the recovery of

  1. Prototyping a Distributed Information Retrieval System That Uses Statistical Ranking.

    ERIC Educational Resources Information Center

    Harman, Donna; And Others

    1991-01-01

    Built using a distributed architecture, this prototype distributed information retrieval system uses statistical ranking techniques to provide better service to the end user. Distributed architecture was shown to be a feasible alternative to centralized or CD-ROM information retrieval, and user testing of the ranking methodology showed both…

  2. User-Centric Multi-Criteria Information Retrieval

    NASA Technical Reports Server (NTRS)

    Wolfe, Shawn R.; Zhang, Yi

    2009-01-01

    Information retrieval models usually represent content only, and not other considerations, such as authority, cost, and recency. How could multiple criteria be utilized in information retrieval, and how would it affect the results? In our experiments, using multiple user-centric criteria always produced better results than a single criteria.

  3. Interfering Effects of Retrieval in Learning New Information

    ERIC Educational Resources Information Center

    Finn, Bridgid; Roediger, Henry L., III

    2013-01-01

    In 7 experiments, we explored the role of retrieval in associative updating, that is, in incorporating new information into an associative memory. We tested the hypothesis that retrieval would facilitate incorporating a new contextual detail into a learned association. Participants learned 3 pieces of information--a person's face, name, and…

  4. Information Retrieval (SPIRES) and Library Automation (BALLOTS) at Stanford University.

    ERIC Educational Resources Information Center

    Ferguson, Douglas, Ed.

    At Stanford University, two major projects have been involved jointly in library automation and information retrieval since 1968: BALLOTS (Bibliographic Automation of Large Library Operations) and SPIRES (Stanford Physics Information Retrieval System). In early 1969, two prototype applications were activated using the jointly developed systems…

  5. Information Retrieval and Creativity: Towards Support for the Original Thinker.

    ERIC Educational Resources Information Center

    Ford, Nigel

    1999-01-01

    Discusses the requirements of information retrieval systems to support creative thinking as well as more convergent thinking. Highlights include the nature of creative thinking; similarity relationships; serendipity; machine processing of similarities; high order knowledge representation; and fuzzy and parallel information retrieval. (Contains 34…

  6. Problems of Music Information Retrieval in the Real World.

    ERIC Educational Resources Information Center

    Byrd, Donald; Crawford, Tim

    2002-01-01

    Considers some of the most fundamental problems in music information retrieval, challenging the common assumption that searching on pitch alone is likely to be satisfactory for all purposes. Discusses special issues related to polyphonic music, user-interface issues, and the notion of relevance for music information retrieval. (Contains 52…

  7. An Expressive and Efficient Language for XML Information Retrieval.

    ERIC Educational Resources Information Center

    Chinenyanga, Taurai Tapiwa; Kushmerick, Nicholas

    2002-01-01

    Discusses XML and information retrieval and describes a query language, ELIXIR (expressive and efficient language for XML information retrieval), with a textual similarity operator that can be used for similarity joins. Explains the algorithm for answering ELIXIR queries to generate intermediate relational data. (Author/LRW)

  8. Fuzzy Information Retrieval Using Genetic Algorithms and Relevance Feedback.

    ERIC Educational Resources Information Center

    Petry, Frederick E.; And Others

    1993-01-01

    Describes an approach that combines concepts from information retrieval, fuzzy set theory, and genetic programing to improve weighted Boolean query formulation via relevance feedback. Highlights include background on information retrieval systems; genetic algorithms; subproblem formulation; and preliminary results based on a testbed. (Contains 12…

  9. A Meta-Model for Evaluating Information Retrieval Serviceability.

    ERIC Educational Resources Information Center

    Hjerppe, Roland

    This document first outlines considerations relative to a systems approach to evaluation, and then argues for such an approach to the evaluation of information retrieval systems (ISR). The criterion of such evaluations should be the utility of the information retrieved to the user, and the ISR ought to be regarded as one of three interrelated…

  10. A Meta-Model for Evaluating Information Retrieval Serviceability.

    ERIC Educational Resources Information Center

    Hjerppe, Roland

    This document first outlines considerations relative to a systems approach to evaluation, and then argues for such an approach to the evaluation of information retrieval systems (ISR). The criterion of such evaluations should be the utility of the information retrieved to the user, and the ISR ought to be regarded as one of three interrelated…

  11. Counter-intuitive Cases of Data Fusion in Information Retrieval.

    ERIC Educational Resources Information Center

    Ibraev, Ulukbek; Kantor, Paul; Ng, K. B.

    2001-01-01

    Aspects of Data Fusion (DF) for information retrieval are explored. Based on a geometrical model of DF, it is shown that in the ideal case, performance of DF for a pair of information retrieval schemes may be approximated by a quadratic polynomial. Compares counter-intuitive cases of DF with cases that behave according to the geometric model. (AEF)

  12. Interfering Effects of Retrieval in Learning New Information

    ERIC Educational Resources Information Center

    Finn, Bridgid; Roediger, Henry L., III

    2013-01-01

    In 7 experiments, we explored the role of retrieval in associative updating, that is, in incorporating new information into an associative memory. We tested the hypothesis that retrieval would facilitate incorporating a new contextual detail into a learned association. Participants learned 3 pieces of information--a person's face, name, and…

  13. Fuzzy Information Retrieval Using Genetic Algorithms and Relevance Feedback.

    ERIC Educational Resources Information Center

    Petry, Frederick E.; And Others

    1993-01-01

    Describes an approach that combines concepts from information retrieval, fuzzy set theory, and genetic programing to improve weighted Boolean query formulation via relevance feedback. Highlights include background on information retrieval systems; genetic algorithms; subproblem formulation; and preliminary results based on a testbed. (Contains 12…

  14. Problems of Music Information Retrieval in the Real World.

    ERIC Educational Resources Information Center

    Byrd, Donald; Crawford, Tim

    2002-01-01

    Considers some of the most fundamental problems in music information retrieval, challenging the common assumption that searching on pitch alone is likely to be satisfactory for all purposes. Discusses special issues related to polyphonic music, user-interface issues, and the notion of relevance for music information retrieval. (Contains 52…

  15. An Expressive and Efficient Language for XML Information Retrieval.

    ERIC Educational Resources Information Center

    Chinenyanga, Taurai Tapiwa; Kushmerick, Nicholas

    2002-01-01

    Discusses XML and information retrieval and describes a query language, ELIXIR (expressive and efficient language for XML information retrieval), with a textual similarity operator that can be used for similarity joins. Explains the algorithm for answering ELIXIR queries to generate intermediate relational data. (Author/LRW)

  16. Attitudes Toward Automated Information Retrieval Services Among RASD Members

    ERIC Educational Resources Information Center

    Nitecki, Danuta A.

    1976-01-01

    Summary of survey of the American Library Association Reference and Adult Services Division (RASD) members concerning attitudes toward, need for, and preferences in acquiring information on automated information retrieval services. (KP)

  17. Information Retrieval and Graph Analysis Approaches for Book Recommendation.

    PubMed

    Benkoussas, Chahinez; Bellot, Patrice

    2015-01-01

    A combination of multiple information retrieval approaches is proposed for the purpose of book recommendation. In this paper, book recommendation is based on complex user's query. We used different theoretical retrieval models: probabilistic as InL2 (Divergence from Randomness model) and language model and tested their interpolated combination. Graph analysis algorithms such as PageRank have been successful in Web environments. We consider the application of this algorithm in a new retrieval approach to related document network comprised of social links. We called Directed Graph of Documents (DGD) a network constructed with documents and social information provided from each one of them. Specifically, this work tackles the problem of book recommendation in the context of INEX (Initiative for the Evaluation of XML retrieval) Social Book Search track. A series of reranking experiments demonstrate that combining retrieval models yields significant improvements in terms of standard ranked retrieval metrics. These results extend the applicability of link analysis algorithms to different environments.

  18. Improve Biomedical Information Retrieval using Modified Learning to Rank Methods.

    PubMed

    Xu, Bo; Lin, Hongfei; Lin, Yuan; Ma, Yunlong; Yang, Liang; Wang, Jian; Yang, Zhihao

    2016-06-14

    In these years, the number of biomedical articles has increased exponentially, which becomes a problem for biologists to capture all the needed information manually. Information retrieval technologies, as the core of search engines, can deal with the problem automatically, providing users with the needed information. However, it is a great challenge to apply these technologies directly for biomedical retrieval, because of the abundance of domain specific terminologies. To enhance biomedical retrieval, we propose a novel framework based on learning to rank. Learning to rank is a series of state-of-the-art information retrieval techniques, and has been proved effective in many information retrieval tasks. In the proposed framework, we attempt to tackle the problem of the abundance of terminologies by constructing ranking models, which focus on not only retrieving the most relevant documents, but also diversifying the searching results to increase the completeness of the resulting list for a given query. In the model training, we propose two novel document labeling strategies, and combine several traditional retrieval models as learning features. Besides, we also investigate the usefulness of different learning to rank approaches in our framework. Experimental results on TREC Genomics datasets demonstrate the effectiveness of our framework for biomedical information retrieval.

  19. Science information systems: Archive, access, and retrieval

    NASA Technical Reports Server (NTRS)

    Campbell, William J.

    1991-01-01

    The objective of this research is to develop technology for the automated characterization and interactive retrieval and visualization of very large, complex scientific data sets. Technologies will be developed for the following specific areas: (1) rapidly archiving data sets; (2) automatically characterizing and labeling data in near real-time; (3) providing users with the ability to browse contents of databases efficiently and effectively; (4) providing users with the ability to access and retrieve system independent data sets electronically; and (5) automatically alerting scientists to anomalies detected in data.

  20. Science information systems: Archive, access, and retrieval

    NASA Technical Reports Server (NTRS)

    Campbell, William J.

    1991-01-01

    The objective of this research is to develop technology for the automated characterization and interactive retrieval and visualization of very large, complex scientific data sets. Technologies will be developed for the following specific areas: (1) rapidly archiving data sets; (2) automatically characterizing and labeling data in near real-time; (3) providing users with the ability to browse contents of databases efficiently and effectively; (4) providing users with the ability to access and retrieve system independent data sets electronically; and (5) automatically alerting scientists to anomalies detected in data.

  1. The JPL Library information retrieval system

    NASA Technical Reports Server (NTRS)

    Walsh, J.

    1975-01-01

    The development, capabilities, and products of the computer-based retrieval system of the Jet Propulsion Laboratory Library are described. The system handles books and documents, produces a book catalog, and provides a machine search capability. Programs and documentation are available to the public through NASA's computer software dissemination program.

  2. Prospects for Intelligent, Language-Based Information Retrieval.

    ERIC Educational Resources Information Center

    Smeaton, Alan F.

    1991-01-01

    Unlike conventional information retrieval systems, natural language processing (NLP) systems translate queries automatically into the language of the system. This paper discusses the potential impact of NLP on both the indexing and retrieval of text and examines some current NLP projects and systems that have established knowledge bases in narrow…

  3. Adapting a Diagnostic Problem-Solving Model to Information Retrieval.

    ERIC Educational Resources Information Center

    Syu, Inien; Lang, S. D.

    2000-01-01

    Explains how a competition-based connectionist model for diagnostic problem-solving is adapted to information retrieval. Topics include probabilistic causal networks; Bayesian networks; the neural network model; empirical studies of test collections that evaluated retrieval performance; precision results; and the use of a thesaurus to provide…

  4. Teaching Online Information Retrieval in United Kingdom Library Schools.

    ERIC Educational Resources Information Center

    Wood, Frances E.

    1984-01-01

    Presents review of recent and current work in the United Kingdom on developing computer assisted learning aids (tape-slide presentations, teaching packages, simulations and emulations of commercial retrieval services) for the teaching of online information retrieval at library schools. Seventeen references are cited. (EJS)

  5. The Creation of New Knowledge by Information Retrieval and Classification.

    ERIC Educational Resources Information Center

    Davies, Roy

    1989-01-01

    Reviews previous work on producing knowledge by the use of information retrieval or classification schemes, and describes techniques by which hidden knowledge may be retrieved, i.e., serendipity in browsing and use of appropriate search strategies. Possible future methods based on relational indexing or artificial intelligence are also explored.…

  6. Prospects for Intelligent, Language-Based Information Retrieval.

    ERIC Educational Resources Information Center

    Smeaton, Alan F.

    1991-01-01

    Unlike conventional information retrieval systems, natural language processing (NLP) systems translate queries automatically into the language of the system. This paper discusses the potential impact of NLP on both the indexing and retrieval of text and examines some current NLP projects and systems that have established knowledge bases in narrow…

  7. An Experimental On-Line Information Retrieval System.

    ERIC Educational Resources Information Center

    Cautin, Harvey; And Others

    This paper reports an experiment in on-line retrieval using man-machine dialogue on a remote console. Message editing procedures and the use of two command languages are described. The system employs a PDP-8 computer for generating, proofreading, and editing messages, and an IBM 7040 computer for information retrieval processing. The symbolic…

  8. Integration of User Profiles: Models and Experiments in Information Retrieval.

    ERIC Educational Resources Information Center

    Myaeng, Sung H.; Korfhage, Robert R.

    1990-01-01

    Discussion of the interpretation of user queries in information retrieval highlights theoretical models that utilize user characteristics maintained in the form of a user profile. Various query/profile interaction models are identified, and an experiment is described that tested the relevance of retrieved documents based on various models. (29…

  9. Requirements for Query Evaluation in Weighted Information Retrieval.

    ERIC Educational Resources Information Center

    Bartschi, Martin

    1985-01-01

    Presents a general mathematical framework for information retrieval, in which query evaluation is seen as a mapping from the free term algebra built by query descriptors and weights to the semantic algebra of evaluation value. Competing mathematical models that try to describe how retrieval systems behave are reviewed. (Author/MBR)

  10. Improving Performance Support Systems through Information Retrieval Evaluation

    ERIC Educational Resources Information Center

    Schatz, Steven

    2006-01-01

    This study examines existent and new methods for evaluating the success of information retrieval systems. The theory underlying current methods is not robust enough to allow testing retrieval using different meta-tagging schema's. Traditional measures rely on judgments of whether a document is relevant to a particular question. A good system…

  11. Integration of Information Retrieval and Database Management Systems.

    ERIC Educational Resources Information Center

    Deogun, Jitender S.; Raghavan, Vijay V.

    1988-01-01

    Discusses the motivation for integrating information retrieval and database management systems, and proposes a probabilistic retrieval model in which records in a file may be composed of attributes (formatted data items) and descriptors (content indicators). The details and resolutions of difficulties involved in integrating such systems are…

  12. Improving Performance Support Systems through Information Retrieval Evaluation

    ERIC Educational Resources Information Center

    Schatz, Steven

    2006-01-01

    This study examines existent and new methods for evaluating the success of information retrieval systems. The theory underlying current methods is not robust enough to allow testing retrieval using different meta-tagging schema's. Traditional measures rely on judgments of whether a document is relevant to a particular question. A good system…

  13. A multiagent architecture for developing medical information retrieval agents.

    PubMed

    Walczak, Steven

    2003-10-01

    Information that is available on the world wide web (WWW) is already more vast than can be comprehensibly studied by individuals and this quantity is increasing at a staggering pace. The quality of service delivered by physicians is dependent on the availability of current information. The agent paradigm offers a means for enabling physicians to filter information and retrieve only information that is relevant to current patient treatments. As with many specialized domains, agent-based information retrieval in medical domains must satisfy several domain-dependent constraints. A multiple agent architecture is developed and described in detail to efficiently provide agent-based information retrieval from the WWW and other explicit information resources. A simulation of the proposed multiple agent architecture shows a 97% decrease in information overload and an 85% increase in information relevancy over existing meta-search tools (with even larger gains over standard search engines).

  14. Object-Centered Knowledge Representation and Information Retrieval.

    ERIC Educational Resources Information Center

    Panyr, Jiri

    1996-01-01

    Discusses object-centered knowledge representation and information retrieval. Highlights include semantic networks; frames; predicative (declarative) and associative knowledge; cluster analysis; creation of subconcepts and superconcepts; automatic classification; hierarchies and pseudohierarchies; graph theory; term classification; clustering of…

  15. Classification in Information Retrieval: The Twenty Years Following Dorking.

    ERIC Educational Resources Information Center

    Coates, E. J.

    1978-01-01

    Discusses theoretical and practical progress made in the classification of information for retrieval in the last 20 years and suggests alternatives to the Dewey Decimal and Library of Congress classification systems. (JVP)

  16. The Investigation of Demand for a Rapid Document Delivery Service for the University of Pittsburgh Library System. Final Report.

    ERIC Educational Resources Information Center

    Montgomery, K. Leon; And Others

    A joint project of the University of Pittsburgh Library System and the School of Library and Information Science investigated the need for a rapid document delivery service within the University Library System (ULS). Two instruments were designed to answer questions about library patrons' uses of bibliographic citations retrieved in online…

  17. The Past and Present of Information Retrieval in Medical Sciences

    NASA Astrophysics Data System (ADS)

    Yamamoto, Torao

    This is a lecture at the 15th anniversary of JICST Kyushu Branch. In Medical Science there are many fields of study classified by the difference of approach. Each field is related closely, and to make a study of a field the knowledges of other fields are also needed. Such characteristic of medical study has been the problem on research of medical literature. Online information retrieval such as JOIS has changed the retrieval much easier, however some difficulties by the characteristic still remain. Importance of training specialist in information retrieval, construction of specialized databases, making databases easier to use and so on are suggested.

  18. Care episode retrieval: distributional semantic models for information retrieval in the clinical domain.

    PubMed

    Moen, Hans; Ginter, Filip; Marsi, Erwin; Peltonen, Laura-Maria; Salakoski, Tapio; Salanterä, Sanna

    2015-01-01

    Patients' health related information is stored in electronic health records (EHRs) by health service providers. These records include sequential documentation of care episodes in the form of clinical notes. EHRs are used throughout the health care sector by professionals, administrators and patients, primarily for clinical purposes, but also for secondary purposes such as decision support and research. The vast amounts of information in EHR systems complicate information management and increase the risk of information overload. Therefore, clinicians and researchers need new tools to manage the information stored in the EHRs. A common use case is, given a--possibly unfinished--care episode, to retrieve the most similar care episodes among the records. This paper presents several methods for information retrieval, focusing on care episode retrieval, based on textual similarity, where similarity is measured through domain-specific modelling of the distributional semantics of words. Models include variants of random indexing and the semantic neural network model word2vec. Two novel methods are introduced that utilize the ICD-10 codes attached to care episodes to better induce domain-specificity in the semantic model. We report on experimental evaluation of care episode retrieval that circumvents the lack of human judgements regarding episode relevance. Results suggest that several of the methods proposed outperform a state-of-the art search engine (Lucene) on the retrieval task.

  19. Care episode retrieval: distributional semantic models for information retrieval in the clinical domain

    PubMed Central

    2015-01-01

    Patients' health related information is stored in electronic health records (EHRs) by health service providers. These records include sequential documentation of care episodes in the form of clinical notes. EHRs are used throughout the health care sector by professionals, administrators and patients, primarily for clinical purposes, but also for secondary purposes such as decision support and research. The vast amounts of information in EHR systems complicate information management and increase the risk of information overload. Therefore, clinicians and researchers need new tools to manage the information stored in the EHRs. A common use case is, given a - possibly unfinished - care episode, to retrieve the most similar care episodes among the records. This paper presents several methods for information retrieval, focusing on care episode retrieval, based on textual similarity, where similarity is measured through domain-specific modelling of the distributional semantics of words. Models include variants of random indexing and the semantic neural network model word2vec. Two novel methods are introduced that utilize the ICD-10 codes attached to care episodes to better induce domain-specificity in the semantic model. We report on experimental evaluation of care episode retrieval that circumvents the lack of human judgements regarding episode relevance. Results suggest that several of the methods proposed outperform a state-of-the art search engine (Lucene) on the retrieval task. PMID:26099735

  20. Semantic annotation for biological information retrieval system.

    PubMed

    Oshaiba, Mohamed Marouf Z; El Houby, Enas M F; Salah, Akram

    2015-01-01

    Online literatures are increasing in a tremendous rate. Biological domain is one of the fast growing domains. Biological researchers face a problem finding what they are searching for effectively and efficiently. The aim of this research is to find documents that contain any combination of biological process and/or molecular function and/or cellular component. This research proposes a framework that helps researchers to retrieve meaningful documents related to their asserted terms based on gene ontology (GO). The system utilizes GO by semantically decomposing it into three subontologies (cellular component, biological process, and molecular function). Researcher has the flexibility to choose searching terms from any combination of the three subontologies. Document annotation is taking a place in this research to create an index of biological terms in documents to speed the searching process. Query expansion is used to infer semantically related terms to asserted terms. It increases the search meaningful results using the term synonyms and term relationships. The system uses a ranking method to order the retrieved documents based on the ranking weights. The proposed system achieves researchers' needs to find documents that fit the asserted terms semantically.

  1. A comparison of Boolean-based retrieval to the WAIS system for retrieval of aeronautical information

    NASA Technical Reports Server (NTRS)

    Marchionini, Gary; Barlow, Diane

    1994-01-01

    An evaluation of an information retrieval system using a Boolean-based retrieval engine and inverted file architecture and WAIS, which uses a vector-based engine, was conducted. Four research questions in aeronautical engineering were used to retrieve sets of citations from the NASA Aerospace Database which was mounted on a WAIS server and available through Dialog File 108 which served as the Boolean-based system (BBS). High recall and high precision searches were done in the BBS and terse and verbose queries were used in the WAIS condition. Precision values for the WAIS searches were consistently above the precision values for high recall BBS searches and consistently below the precision values for high precision BBS searches. Terse WAIS queries gave somewhat better precision performance than verbose WAIS queries. In every case, a small number of relevant documents retrieved by one system were not retrieved by the other, indicating the incomplete nature of the results from either retrieval system. Relevant documents in the WAIS searches were found to be randomly distributed in the retrieved sets rather than distributed by ranks. Advantages and limitations of both types of systems are discussed.

  2. Adaptive Visualization for Focused Personalized Information Retrieval

    ERIC Educational Resources Information Center

    Ahn, Jae-wook

    2010-01-01

    The new trend on the Web has totally changed today's information access environment. The traditional information overload problem has evolved into the qualitative level beyond the quantitative growth. The mode of producing and consuming information is changing and we need a new paradigm for accessing information. Personalized search is one of…

  3. Adaptive Visualization for Focused Personalized Information Retrieval

    ERIC Educational Resources Information Center

    Ahn, Jae-wook

    2010-01-01

    The new trend on the Web has totally changed today's information access environment. The traditional information overload problem has evolved into the qualitative level beyond the quantitative growth. The mode of producing and consuming information is changing and we need a new paradigm for accessing information. Personalized search is one of…

  4. A Comparison of Three Online Information Retrieval Services.

    ERIC Educational Resources Information Center

    Zais, Harriet W.

    Three firms which offer online information retrieval are compared. The firms are Lockheed Information Service, System Development Corporation and the Western Research Application Center. Comparison tables provide information such as hours accessible, coverage, file update, search elements and cost figures for 15 data bases. In addition, general…

  5. The Dilemma of the Subjective in Information Organisation and Retrieval.

    ERIC Educational Resources Information Center

    Neill, S. D.

    1987-01-01

    This review of the literature discusses theories of information with emphasis on the views of Dervin and Popper on subjectivity and objectivity as they relate to information use. Classification and indexing as applied in information retrieval systems and libraries are also discussed, and 78 references are provided. (LRW)

  6. Weighted Markov Chains and Graphic State Nodes for Information Retrieval.

    ERIC Educational Resources Information Center

    Benoit, G.

    2002-01-01

    Discusses users' search behavior and decision making in data mining and information retrieval. Describes iterative information seeking as a Markov process during which users advance through states of nodes; and explains how the information system records the decision as weights, allowing the incorporation of users' decisions into the Markov…

  7. Roogle: an information retrieval engine for clinical data warehouse.

    PubMed

    Cuggia, Marc; Garcelon, Nicolas; Campillo-Gimenez, Boris; Bernicot, Thomas; Laurent, Jean-François; Garin, Etienne; Happe, André; Duvauferrier, Régis

    2011-01-01

    High amount of relevant information is contained in reports stored in the electronic patient records and associated metadata. R-oogle is a project aiming at developing information retrieval engines adapted to these reports and designed for clinicians. The system consists in a data warehouse (full-text reports and structured data) imported from two different hospital information systems. Information retrieval is performed using metadata-based semantic and full-text search methods (as Google). Applications may be biomarkers identification in a translational approach, search of specific cases, and constitution of cohorts, professional practice evaluation, and quality control assessment.

  8. Immunology in Pittsburgh.

    PubMed

    Finn, Olivera J; Salter, Russell D

    2006-01-01

    The University of Pittsburgh School of Medicine has a long tradition of excellence in immunology research and training. Faculty, students, and postdoctoral fellows walk through hallways that are pictorial reminders of the days when Dr. Jonas Salk worked here to develop the polio vaccine, or when Dr. Niels Jerne chaired the Microbiology Department and worked on perfecting the Jerne Plaque Assay for antibody-producing cells. Colleagues and postdoctoral fellows of Professor Salk are still on the faculty of the University of Pittsburgh Medical School as are graduate students of Professor Jerne. A modern research building, the 17 story high Biomedical Science Tower, is a vivid reminder of the day when Dr. Thomas Starzl arrived in Pittsburgh and started building the most prominent solid-organ-transplant program in the world. The immunology research that developed around the problem of graft rejection and tolerance induction trained numerous outstanding students and fellows. Almost 20 yr ago, the University of Pittsburgh founded the University of Pittsburgh Cancer Institute (UPCI) with the renowned immunologist Dr. Ronald Herberman at its helm. This started a number of new research initiatives in cancer immunology and immunotherapy. A large number of outstanding young investigators, as well as several well-established tumor immunologists, were recruited to Pittsburgh at that time.

  9. Incorporating Temporal Information in Microblog Retrieval

    DTIC Science & Technology

    2012-11-01

    Urbana-Champaign Urbana-Champaign, IL, USA willis8@illinois.edu Richard Medlin School of Information & Library Science University of North Carolina at...Chapel Hill Chapel Hill, NC, USA rich_medlin@med.unc.edu Jaime Arguello † School of Information & Library Science University of North Carolina at...published prior to time tQ. The School of Information and Library Science at the Uni- versity of Carolina at Chapel Hill submitted four runs to the Microblog

  10. Hypertext and hypermedia systems in information retrieval

    NASA Technical Reports Server (NTRS)

    Kaye, K. M.; Kuhn, A. D.

    1992-01-01

    This paper opens with a brief history of hypertext and hypermedia in the context of information management during the 'information age.' Relevant terms are defined and the approach of the paper is explained. Linear and hypermedia information access methods are contrasted. A discussion of hyperprogramming in the handling of complex scientific and technical information follows. A selection of innovative hypermedia systems is discussed. An analysis of the Clinical Practice Library of Medicine NASA STI Program hypermedia application is presented. The paper concludes with a discussion of the NASA STI Program's future hypermedia project plans.

  11. Hypertext and hypermedia systems in information retrieval

    NASA Technical Reports Server (NTRS)

    Kaye, K. M.; Kuhn, A. D.

    1992-01-01

    This paper opens with a brief history of hypertext and hypermedia in the context of information management during the 'information age.' Relevant terms are defined and the approach of the paper is explained. Linear and hypermedia information access methods are contrasted. A discussion of hyperprogramming in the handling of complex scientific and technical information follows. A selection of innovative hypermedia systems is discussed. An analysis of the Clinical Practice Library of Medicine NASA STI Program hypermedia application is presented. The paper concludes with a discussion of the NASA STI Program's future hypermedia project plans.

  12. Can We Retrieve the Information Which Was Intentionally Forgotten? Electrophysiological Correlates of Strategic Retrieval in Directed Forgetting

    PubMed Central

    Mao, Xinrui; Tian, Mengxi; Liu, Yi; Li, Bingcan; Jin, Yan; Wu, Yanhong; Guo, Chunyan

    2017-01-01

    Retrieval inhibition hypothesis of directed forgetting effects assumed TBF (to-be-forgotten) items were not retrieved intentionally, while selective rehearsal hypothesis assumed the memory representation of retrieved TBF (to-be-forgotten) items was weaker than TBR (to-be-remembered) items. Previous studies indicated that directed forgetting effects of item-cueing method resulted from selective rehearsal at encoding, but the mechanism of retrieval inhibition that affected directed forgetting of TBF (to-be-forgotten) items was not clear. Strategic retrieval is a control process allowing the selective retrieval of target information, which includes retrieval orientation and strategic recollection. Retrieval orientation via the comparison of tasks refers to the specific form of processing resulted by retrieval efforts. Strategic recollection is the type of strategies to recollect studied items for the retrieval success of targets. Using a “directed forgetting” paradigm combined with a memory exclusion task, our investigation of strategic retrieval in directed forgetting assisted to explore how retrieval inhibition played a role on directed forgetting effects. When TBF items were targeted, retrieval orientation showed more positive ERPs to new items, indicating that TBF items demanded more retrieval efforts. The results of strategic recollection indicated that: (a) when TBR items were retrieval targets, late parietal old/new effects were only evoked by TBR items but not TBF items, indicating the retrieval inhibition of TBF items; (b) when TBF items were retrieval targets, the late parietal old/new effect were evoked by both TBR items and TBF items, indicating that strategic retrieval could overcome retrieval inhibition of TBF items. These findings suggested the modulation of strategic retrieval on retrieval inhibition of directed forgetting, supporting that directed forgetting effects were not only caused by selective rehearsal, but also retrieval inhibition. PMID

  13. Can We Retrieve the Information Which Was Intentionally Forgotten? Electrophysiological Correlates of Strategic Retrieval in Directed Forgetting.

    PubMed

    Mao, Xinrui; Tian, Mengxi; Liu, Yi; Li, Bingcan; Jin, Yan; Wu, Yanhong; Guo, Chunyan

    2017-01-01

    Retrieval inhibition hypothesis of directed forgetting effects assumed TBF (to-be-forgotten) items were not retrieved intentionally, while selective rehearsal hypothesis assumed the memory representation of retrieved TBF (to-be-forgotten) items was weaker than TBR (to-be-remembered) items. Previous studies indicated that directed forgetting effects of item-cueing method resulted from selective rehearsal at encoding, but the mechanism of retrieval inhibition that affected directed forgetting of TBF (to-be-forgotten) items was not clear. Strategic retrieval is a control process allowing the selective retrieval of target information, which includes retrieval orientation and strategic recollection. Retrieval orientation via the comparison of tasks refers to the specific form of processing resulted by retrieval efforts. Strategic recollection is the type of strategies to recollect studied items for the retrieval success of targets. Using a "directed forgetting" paradigm combined with a memory exclusion task, our investigation of strategic retrieval in directed forgetting assisted to explore how retrieval inhibition played a role on directed forgetting effects. When TBF items were targeted, retrieval orientation showed more positive ERPs to new items, indicating that TBF items demanded more retrieval efforts. The results of strategic recollection indicated that: (a) when TBR items were retrieval targets, late parietal old/new effects were only evoked by TBR items but not TBF items, indicating the retrieval inhibition of TBF items; (b) when TBF items were retrieval targets, the late parietal old/new effect were evoked by both TBR items and TBF items, indicating that strategic retrieval could overcome retrieval inhibition of TBF items. These findings suggested the modulation of strategic retrieval on retrieval inhibition of directed forgetting, supporting that directed forgetting effects were not only caused by selective rehearsal, but also retrieval inhibition.

  14. Local Area Networks for Information Retrieval.

    ERIC Educational Resources Information Center

    Kibirige, Harry M.

    This examination of the use of local area networks (LANs) by libraries summarizes the findings of a nationwide survey of 600 libraries and information centers and 200 microcomputer networking system manufacturers and vendors, which was conducted to determine the relevance of currently available networking systems for library and information center…

  15. Cosmos: An Information Retrieval System that Works.

    ERIC Educational Resources Information Center

    Clay, Katherine; Grossman, Alvin

    1980-01-01

    Briefly described is the County of San Mateo Online System (COSMOS) which was developed and is used by the San Mateo Educational Resources Center (SMERC) to access the Educational Resources Information Center (ERIC) and Fugitive Information Data Organizer (FIDO) databases as well as the curriculum guides housed at SMERC. (TG)

  16. Music information retrieval in compressed audio files: a survey

    NASA Astrophysics Data System (ADS)

    Zampoglou, Markos; Malamos, Athanasios G.

    2014-07-01

    In this paper, we present an organized survey of the existing literature on music information retrieval systems in which descriptor features are extracted directly from the compressed audio files, without prior decompression to pulse-code modulation format. Avoiding the decompression step and utilizing the readily available compressed-domain information can significantly lighten the computational cost of a music information retrieval system, allowing application to large-scale music databases. We identify a number of systems relying on compressed-domain information and form a systematic classification of the features they extract, the retrieval tasks they tackle and the degree in which they achieve an actual increase in the overall speed-as well as any resulting loss in accuracy. Finally, we discuss recent developments in the field, and the potential research directions they open toward ultra-fast, scalable systems.

  17. Efficient medical information retrieval in encrypted Electronic Health Records.

    PubMed

    Pruski, Cédric; Wisniewski, François

    2012-01-01

    The recent development of eHealth platforms across the world, whose main objective is to centralize patient's healthcare information to ensure the best continuity of care, requires the development of advanced tools and techniques for supporting health professionals in retrieving relevant information in this vast quantity of data. However, for preserving patient's privacy, some countries decided to de-identify and encrypt data contained in the shared Electronic Health Records, which reinforces the complexity of proposing efficient medical information retrieval approach. In this paper, we describe an original approach exploiting standards metadata as well as knowledge organizing systems to overcome the barriers of data encryption for improving the results of medical information retrieval in centralized and encrypted Electronic Health Records. This is done through the exploitation of semantic properties provided by knowledge organizing systems, which enable query expansion. Furthermore, we provide an overview of the approach together with illustrating examples and a discussion on the advantages and limitations of the provided framework.

  18. Information Storage and Retrieval...Reports on Analysis, Dictionary Construction, User Feedback, Clustering, and On-Line Retrieval.

    ERIC Educational Resources Information Center

    Cornell Univ., Ithaca, NY. Dept. of Computer Science.

    Part One, Automatic Content Analysis contains: "Content Analysis in Information Retrieval;""The 'Generality' Effect and the Retrieval Evaluation for Large Collections;""Automatic Indexing Using Bibliographic Citations" and "Automatic Resolution of Ambiguities from Natural Language Text." Part Two, Automatic…

  19. Text encoding for retrieving scientific and technical information

    SciTech Connect

    Strehlow, R.A.; Tallant, T.O.; Mason, J.D.; Kienlen, P.L.

    1991-01-01

    The authors have recently proposed a method a manage and to retrieve scientific and technical information based on the encoding of information within the document using Standard Generalized Markup Language (SGML). The encoding will include the scientific and technical information, as well as associated and ancillary scientific data, management data, and other metadata. The work proposed at the Oak Ridge National Laboratory will include tagset selection, document type definition writing, test document encoding, and programming that will permit various views of a document to be made. This paper describes the proposed method and work. Precise retrieval of contained information is conventionally done by means of Boolean searches to retrieve a set of documents that have been probability of containing the desired information. Standardized terminologies have long been a key element in constructing efficient search plans for these searches. Combined with added techniques of corpus selection, author or institution restriction, etc., effective searches can often be constructed. With the increase in corpus size, however, the standard methods become progressively less effective. The planned method described here involves a radically different approach to the retrieval problems. Its objective is the direct retrieval of information. The work of this study will be carried out by a multi-disciplinary team of engineering, scientific, publication, and information specialists. Computer programs to retrieve information from encoded sample documents will be either acquired or written and then tested. At the final stage of the work, after evaluation of the program, plans will be developed to apply the method to a wide range of specialized fields.

  20. Text encoding for retrieving scientific and technical information

    SciTech Connect

    Strehlow, R.A.; Tallant, T.O.; Mason, J.D.; Kienlen, P.L.

    1991-12-31

    The authors have recently proposed a method a manage and to retrieve scientific and technical information based on the encoding of information within the document using Standard Generalized Markup Language (SGML). The encoding will include the scientific and technical information, as well as associated and ancillary scientific data, management data, and other metadata. The work proposed at the Oak Ridge National Laboratory will include tagset selection, document type definition writing, test document encoding, and programming that will permit various views of a document to be made. This paper describes the proposed method and work. Precise retrieval of contained information is conventionally done by means of Boolean searches to retrieve a set of documents that have been probability of containing the desired information. Standardized terminologies have long been a key element in constructing efficient search plans for these searches. Combined with added techniques of corpus selection, author or institution restriction, etc., effective searches can often be constructed. With the increase in corpus size, however, the standard methods become progressively less effective. The planned method described here involves a radically different approach to the retrieval problems. Its objective is the direct retrieval of information. The work of this study will be carried out by a multi-disciplinary team of engineering, scientific, publication, and information specialists. Computer programs to retrieve information from encoded sample documents will be either acquired or written and then tested. At the final stage of the work, after evaluation of the program, plans will be developed to apply the method to a wide range of specialized fields.

  1. LOGISTIC MANAGEMENT INFORMATION SYSTEM - MANUAL DATA STORAGE AND RETRIEVAL SYSTEM.

    DTIC Science & Technology

    Logistics Management Information System . The procedures are applicable to manual storage and retrieval of all data used in the Logistics Management ... Information System (LMIS) and include the following: (1) Action Officer data source file. (2) Action Officer presentation format file. (3) LMI Coordination

  2. Level Search Schemes for Information Filtering and Retrieval.

    ERIC Educational Resources Information Center

    Zhang, Xiaoyan; Berry, Michael W.; Raghavan, Padma

    2001-01-01

    Discusses latent semantic indexing (LSI); considers the high cost associated with the singular value decomposition (SVD) of the large term-by-document matrix that becomes a barrier for its application to scalable information retrieval; and shows that information filtering using level search techniques can reduce the SVD computation cost for LSI.…

  3. Teaching Skills in Medical Information Retrieval to Medical Students.

    ERIC Educational Resources Information Center

    Kolner, Stuart J.; And Others

    1986-01-01

    A project that attempts to overcome the principal obstacles and to provide an efficient and effective method of teaching information retrieval skills to second-year medical students is described. The method includes a pretest, a diagnosis of deficiencies in information skills, a self-paced learning module, and a posttest. (Author/MLW)

  4. Storage and Retrieval of Information on Psychological Measures

    ERIC Educational Resources Information Center

    Chun, Ki-Tack; And Others

    1973-01-01

    Information overproduction and the lack of an adequate system for its storage and retrieval have frustrated integrative efforts and hindered orderly progress in the area of psychological testing. Describes a prototype repository system to handle and service the mass of information produced. (Authors)

  5. Research and Development of Information Retrieval Models and Their Applications.

    ERIC Educational Resources Information Center

    Fox, Edward A.

    1989-01-01

    This introduction to a special issue devoted to modeling data, information, and knowledge briefly describes the origins of the papers presented and the topics covered, which include: Boolean logic; probability theory; artificial intelligence; organizing and encoding information and data; and characteristics of users of retrieval systems. (12…

  6. Level Search Schemes for Information Filtering and Retrieval.

    ERIC Educational Resources Information Center

    Zhang, Xiaoyan; Berry, Michael W.; Raghavan, Padma

    2001-01-01

    Discusses latent semantic indexing (LSI); considers the high cost associated with the singular value decomposition (SVD) of the large term-by-document matrix that becomes a barrier for its application to scalable information retrieval; and shows that information filtering using level search techniques can reduce the SVD computation cost for LSI.…

  7. Information Storage and Retrieval. Reports on Analysis, Search, and Iterative Retrieval.

    ERIC Educational Resources Information Center

    Salton, Gerard

    As the fourteenth report in a series describing research in automatic information storage and retrieval, this document covers work carried out on the SMART project for approximately one year (summer 1967 to summer 1968). The document is divided into four main parts: (1) SMART systems design, (2) analysis and search experiments, (3) user feedback…

  8. Information Storage and Retrieval. Reports on Analysis, Search, and Iterative Retrieval.

    ERIC Educational Resources Information Center

    Salton, Gerard

    As the fourteenth report in a series describing research in automatic information storage and retrieval, this document covers work carried out on the SMART project for approximately one year (summer 1967 to summer 1968). The document is divided into four main parts: (1) SMART systems design, (2) analysis and search experiments, (3) user feedback…

  9. Modeling the Retrieval Process for an Information Retrieval System Using an Ordinal Fuzzy Linguistic Approach.

    ERIC Educational Resources Information Center

    Herrera-Viedma, E.

    2001-01-01

    Proposes a linguistic model for an Information Retrieval System (IRS) defined using an ordinal fuzzy linguistic approach. The query subsystem accepts Boolean queries with terms weighted by ordinal linguistic values and the evaluation subsystem returns documents arranged in relevance classes labeled with ordinal linguistic values. The system gives…

  10. Storage and retrieval of mass spectral information

    NASA Technical Reports Server (NTRS)

    Hohn, M. E.; Humberston, M. J.; Eglinton, G.

    1977-01-01

    Computer handling of mass spectra serves two main purposes: the interpretation of the occasional, problematic mass spectrum, and the identification of the large number of spectra generated in the gas-chromatographic-mass spectrometric (GC-MS) analysis of complex natural and synthetic mixtures. Methods available fall into the three categories of library search, artificial intelligence, and learning machine. Optional procedures for coding, abbreviating and filtering a library of spectra minimize time and storage requirements. Newer techniques make increasing use of probability and information theory in accessing files of mass spectral information.

  11. Decoherence and the retrieval of lost information

    NASA Astrophysics Data System (ADS)

    Ye, Yin; Cao, Yunshan; Li, Xin-Qi; Gurvitz, Shmuel

    2011-12-01

    We show that, contrary to common prejudice, a measurement of an open quantum system can reduce its decoherence rate. We demonstrate this in an example of indirect measurement of a qubit, where information regarding its state is hidden in the environment. This information is extracted by a distant device, coupled with the environment only. We also show that the reduction of decoherence generated by this device is accompanied by diminution of the environmental noise in the vicinity of the qubit. An interpretation of these results in terms of quantum interference on large scales is presented.

  12. Storage and retrieval of mass spectral information

    NASA Technical Reports Server (NTRS)

    Hohn, M. E.; Humberston, M. J.; Eglinton, G.

    1977-01-01

    Computer handling of mass spectra serves two main purposes: the interpretation of the occasional, problematic mass spectrum, and the identification of the large number of spectra generated in the gas-chromatographic-mass spectrometric (GC-MS) analysis of complex natural and synthetic mixtures. Methods available fall into the three categories of library search, artificial intelligence, and learning machine. Optional procedures for coding, abbreviating and filtering a library of spectra minimize time and storage requirements. Newer techniques make increasing use of probability and information theory in accessing files of mass spectral information.

  13. Retrieval Strategies for Linearly Ordered Information

    ERIC Educational Resources Information Center

    Polich, John M.; Potts, George R.

    1977-01-01

    Subjects responded to pairs of test items from learned linear orderings (e.g., Tom is taller than Dick; Dick is taller than Sam, etc.). Results are compared with previous studies of ordered linguistic, perceptual, and numerical information. (Editor/RK)

  14. Popular Magazines Discuss Online Information Retrieval.

    ERIC Educational Resources Information Center

    Diodato, Virgil

    1984-01-01

    Examines 55 articles from 25 popular magazines such as "Better Homes and Gardens,""Business Week,""Popular Mechanics," and "Working Woman" and discusses purpose of the articles, consumer oriented online services, libraries and information centers, databases, and publishers and intermediaries. A list of the…

  15. Image-based information, communication, and retrieval

    NASA Technical Reports Server (NTRS)

    Bryant, N. A.; Zobrist, A. L.

    1980-01-01

    IBIS/VICAR system combines video image processing and information management. Flexible programs require user to supply only parameters specific to particular application. Special-purpose input/output routines transfer image data with reduced memory requirements. New application programs are easily incorporated. Program is written in FORTRAN IV, Assembler, and OS JCL for batch execution and has been implemented on IBM 360.

  16. Web-based multimedia information retrieval for clinical application research

    NASA Astrophysics Data System (ADS)

    Cao, Xinhua; Hoo, Kent S., Jr.; Zhang, Hong; Ching, Wan; Zhang, Ming; Wong, Stephen T. C.

    2001-08-01

    We described a web-based data warehousing method for retrieving and analyzing neurological multimedia information. The web-based method supports convenient access, effective search and retrieval of clinical textual and image data, and on-line analysis. To improve the flexibility and efficiency of multimedia information query and analysis, a three-tier, multimedia data warehouse for epilepsy research has been built. The data warehouse integrates clinical multimedia data related to epilepsy from disparate sources and archives them into a well-defined data model.

  17. Improving life sciences information retrieval using semantic web technology.

    PubMed

    Quan, Dennis

    2007-05-01

    The ability to retrieve relevant information is at the heart of every aspect of research and development in the life sciences industry. Information is often distributed across multiple systems and recorded in a way that makes it difficult to piece together the complete picture. Differences in data formats, naming schemes and network protocols amongst information sources, both public and private, must be overcome, and user interfaces not only need to be able to tap into these diverse information sources but must also assist users in filtering out extraneous information and highlighting the key relationships hidden within an aggregated set of information. The Semantic Web community has made great strides in proposing solutions to these problems, and many efforts are underway to apply Semantic Web techniques to the problem of information retrieval in the life sciences space. This article gives an overview of the principles underlying a Semantic Web-enabled information retrieval system: creating a unified abstraction for knowledge using the RDF semantic network model; designing semantic lenses that extract contextually relevant subsets of information; and assembling semantic lenses into powerful information displays. Furthermore, concrete examples of how these principles can be applied to life science problems including a scenario involving a drug discovery dashboard prototype called BioDash are provided.

  18. Information Retrieval in Telemedicine: a Comparative Study on Bibliographic Databases

    PubMed Central

    Ahmadi, Maryam; Sarabi, Roghayeh Ershad; Orak, Roohangiz Jamshidi; Bahaadinbeigy, Kambiz

    2015-01-01

    Background and Aims: The first step in each systematic review is selection of the most valid database that can provide the highest number of relevant references. This study was carried out to determine the most suitable database for information retrieval in telemedicine field. Methods: Cinhal, PubMed, Web of Science and Scopus databases were searched for telemedicine matched with Education, cost benefit and patient satisfaction. After analysis of the obtained results, the accuracy coefficient, sensitivity, uniqueness and overlap of databases were calculated. Results: The studied databases differed in the number of retrieved articles. PubMed was identified as the most suitable database for retrieving information on the selected topics with the accuracy and sensitivity ratios of 50.7% and 61.4% respectively. The uniqueness percent of retrieved articles ranged from 38% for Pubmed to 3.0% for Cinhal. The highest overlap rate (18.6%) was found between PubMed and Web of Science. Less than 1% of articles have been indexed in all searched databases. Conclusion: PubMed is suggested as the most suitable database for starting search in telemedicine and after PubMed, Scopus and Web of Science can retrieve about 90% of the relevant articles. PMID:26236086

  19. Information Retrieval in Telemedicine: a Comparative Study on Bibliographic Databases.

    PubMed

    Ahmadi, Maryam; Sarabi, Roghayeh Ershad; Orak, Roohangiz Jamshidi; Bahaadinbeigy, Kambiz

    2015-06-01

    The first step in each systematic review is selection of the most valid database that can provide the highest number of relevant references. This study was carried out to determine the most suitable database for information retrieval in telemedicine field. Cinhal, PubMed, Web of Science and Scopus databases were searched for telemedicine matched with Education, cost benefit and patient satisfaction. After analysis of the obtained results, the accuracy coefficient, sensitivity, uniqueness and overlap of databases were calculated. The studied databases differed in the number of retrieved articles. PubMed was identified as the most suitable database for retrieving information on the selected topics with the accuracy and sensitivity ratios of 50.7% and 61.4% respectively. The uniqueness percent of retrieved articles ranged from 38% for Pubmed to 3.0% for Cinhal. The highest overlap rate (18.6%) was found between PubMed and Web of Science. Less than 1% of articles have been indexed in all searched databases. PubMed is suggested as the most suitable database for starting search in telemedicine and after PubMed, Scopus and Web of Science can retrieve about 90% of the relevant articles.

  20. Classifying and identifying servers for biomedical information retrieval.

    PubMed

    Patrick, T B; Springer, G K

    1994-01-01

    Useful retrieval of biomedical information from network information sources requires methods for organized access to those information sources. This access must be organized in terms of the information content of information sources and in terms of the discovery of the network location of those information sources. We have developed an approach to providing organized access to information sources based on a scheme of hierarchical classifiers and identifiers of the servers providing access to those information sources. This approach uses MeSH tree numbers as both classifiers and identifiers of servers. MeSH tree numbers are used to indicate the information content of servers, and also as OSF/DCE server identifiers. This allows the identity and location of a server providing access to a given information source to be determined from the information classification of that information source.

  1. Status report on SIRS: sorption information retrieval system

    SciTech Connect

    Hostetler, D.D.; Serne, R.J.; Baldwin, A.J.; Petrie, G.M.

    1980-11-01

    Two major uses were identified for the Sorption Information Retrieval System: (1) to aid geochemists in the elucidation of sorption mechanisms; and (2) to aid safety assessment modelers in selection of Kds for any given scenerio. Other benefits such as providing an auditable vehicle for the Kd selection were also discussed.

  2. Beyond Information Retrieval: Ways To Provide Content in Context.

    ERIC Educational Resources Information Center

    Wiley, Deborah Lynne

    1998-01-01

    Provides an overview of information retrieval from mainframe systems to Web search engines; discusses collaborative filtering, data extraction, data visualization, agent technology, pattern recognition, classification and clustering, and virtual communities. Argues that rather than huge data-storage centers and proprietary software, we need…

  3. Classification Clustering, Probabilistic Information Retrieval, and the Online Catalog.

    ERIC Educational Resources Information Center

    Larson, Ray R.

    1991-01-01

    Discusses problems with subject searches in online library catalogs and examines theoretical principles for the design of effective information retrieval systems. Probabilistic ranking methods are discussed, and an experimental online catalog called CHESHIRE is described. It is noted that CHESHIRE uses classification clustering, provides natural…

  4. Introducing Chemistry Undergraduate Students to Online Chemical Information Retrieval.

    ERIC Educational Resources Information Center

    Wolman, Yecheskel

    1985-01-01

    The results of manual and online searching are compared during a unit on online chemical information retrieval taught at Hebrew University. Strategies and results obtained are provided for student searches on the synthesis of vitamin K(3) from 2-methylnaphthalene and polywater. (JN)

  5. Fault-tolerant symmetrically-private information retrieval

    NASA Astrophysics Data System (ADS)

    Wang, Tian-Yin; Cai, Xiao-Qiu; Zhang, Rui-Ling

    2016-08-01

    We propose two symmetrically-private information retrieval protocols based on quantum key distribution, which provide a good degree of database and user privacy while being flexible, loss-resistant and easily generalized to a large database similar to the precedent works. Furthermore, one protocol is robust to a collective-dephasing noise, and the other is robust to a collective-rotation noise.

  6. Information Theoretic Similarity Measures for Content Based Image Retrieval.

    ERIC Educational Resources Information Center

    Zachary, John; Iyengar, S. S.

    2001-01-01

    Content-based image retrieval is based on the idea of extracting visual features from images and using them to index images in a database. Proposes similarity measures and an indexing algorithm based on information theory that permits an image to be represented as a single number. When used in conjunction with vectors, this method displays…

  7. Impact of Anaphoric Resolution in Information Retrieval. Final Report.

    ERIC Educational Resources Information Center

    Katzer, Jeffrey; And Others

    This project examines anaphora (the linguistic device of abbreviated subsequent reference to a concept) in information retrieval (IR) systems in order to develop procedures to recognize anaphors in text and distinguish between anaphoric and non-anaphoric uses of a given term, estimate the number of anaphors appearing in bibliographic records, and…

  8. Vocabulary Mining for Information Retrieval: Rough Sets and Fuzzy Sets.

    ERIC Educational Resources Information Center

    Srinivasan, Padmini; Ruiz, Miguel E.; Kraft, Donald H.; Chen, Jianhua

    2001-01-01

    Explains vocabulary mining in information retrieval and describes a framework for vocabulary mining that allows the use of rough set-based approximations even when documents and queries are described using weighted, or fuzzy, representations. Examines coordination between multiple vocabulary views and applies the framework to the Unified Medical…

  9. Cross-Language Information Retrieval: An Analysis of Errors.

    ERIC Educational Resources Information Center

    Ruiz, Miguel E.; Srinivasan, Padmini

    1998-01-01

    Investigates an automatic method for Cross Language Information Retrieval (CLIR) that utilizes the multilingual Unified Medical Language System (UMLS) Metathesaurus to translate Spanish natural-language queries into English. Results indicate that for Spanish, the UMLS Metathesaurus-based CLIR method is at least equivalent to if not better than…

  10. On-Line Information Retrieval as a Scientists Tool

    ERIC Educational Resources Information Center

    Barber, A. Stephanie; And Others

    1973-01-01

    The use of an on-line information retrieval system by the scientists themselves is described. MEDUSA was designed to allow physicians to interrogate the MEDLARS data base. A Brief description is given of the system and details of an experiment to test its effectiveness. (8 references) (Author)

  11. Development of Information Retrieval Skills for Freshman Medical Students.

    ERIC Educational Resources Information Center

    Moore, Gerald F.

    1988-01-01

    A study, using a specific patient encounter as the focal point for each student's research, is described that documents the skills of entering freshmen medical students before and immediately after a short course emphasizing information retrieval and at follow-up one year later. (MLW)

  12. Cross-Language Information Retrieval: An Analysis of Errors.

    ERIC Educational Resources Information Center

    Ruiz, Miguel E.; Srinivasan, Padmini

    1998-01-01

    Investigates an automatic method for Cross Language Information Retrieval (CLIR) that utilizes the multilingual Unified Medical Language System (UMLS) Metathesaurus to translate Spanish natural-language queries into English. Results indicate that for Spanish, the UMLS Metathesaurus-based CLIR method is at least equivalent to if not better than…

  13. Information Retrieval in Multimedia Sources in an Electronic Age.

    ERIC Educational Resources Information Center

    Li, Tze-chung

    The last three decades have shown a marked development in new technologies for storing and retrieving information: microform in the 1960s; online database in the 1970s, and CD-ROM in the 1980s. While microform lacks volatility and multiple access points, preservation programs find it to be ideal storage media: it has a longer life expectancy than…

  14. Information Retrieval for Education: Making Search Engines Language Aware

    ERIC Educational Resources Information Center

    Ott, Niels; Meurers, Detmar

    2010-01-01

    Search engines have been a major factor in making the web the successful and widely used information source it is today. Generally speaking, they make it possible to retrieve web pages on a topic specified by the keywords entered by the user. Yet web searching currently does not take into account which of the search results are comprehensible for…

  15. Information Retrieval Today. Revised, Retitled, and Expanded Edition.

    ERIC Educational Resources Information Center

    Lancaster, F. Wilfrid; Warner, Amy J.

    The emphasis of this text is that the problems of information retrieval are the intellectual ones of subject analysis and description. These problems are not easily solved by technology alone, although certain inroads are being made by knowledge-based expert systems and other computer aids to indexing. Linguistic approaches are also showing…

  16. Crossover Improvement for the Genetic Algorithm in Information Retrieval.

    ERIC Educational Resources Information Center

    Vrajitoru, Dana

    1998-01-01

    In information retrieval (IR), the aim of genetic algorithms (GA) is to help a system to find, in a huge documents collection, a good reply to a query expressed by the user. Analysis of phenomena seen during the implementation of a GA for IR has led to a new crossover operation, which is introduced and compared to other learning methods.…

  17. Support Vector Machines: Relevance Feedback and Information Retrieval.

    ERIC Educational Resources Information Center

    Drucker, Harris; Shahrary, Behzad; Gibbon, David C.

    2002-01-01

    Compares support vector machines (SVMs) to Rocchio, Ide regular and Ide dec-hi algorithms in information retrieval (IR) of text documents using relevancy feedback. If the preliminary search is so poor that one has to search through many documents to find at least one relevant document, then SVM is preferred. Includes nine tables. (Contains 24…

  18. Information Storage and Retrieval Scientific Report No. ISR-22.

    ERIC Educational Resources Information Center

    Salton, Gerard

    The twenty-second in a series, this report describes research in information organization and retrieval conducted by the Department of Computer Science at Cornell University. The report covers work carried out during the period summer 1972 through summer 1974 and is divided into four parts: indexing theory, automatic content analysis, feedback…

  19. The Politics of Information: Libraries and Online Retrieval Systems.

    ERIC Educational Resources Information Center

    Haar, John M.

    1986-01-01

    Discusses political questions raised by the existence and growth potential of the online retrieval industry because it is privately owned and profit oriented. The user fee debate, information ownership, danger of manipulation, libraries as marketers, library action, and a library database consortium are highlighted. Seventeen references are cited.…

  20. Integration of Complex Objects and Transitive Relationships for Information Retrieval.

    ERIC Educational Resources Information Center

    Jarvelin, Kalervo; Niemi, Timo

    1999-01-01

    Shows that in advanced information-retrieval applications capabilities for data aggregation, transitive computation and non-first normal-form relational computation are often necessary at the same time. Topics include complex objects; advanced data models; query languages; query formulation; knowledge representation; and query-language syntax.…

  1. Towards an Intelligent Possibilistic Web Information Retrieval Using Multiagent System

    ERIC Educational Resources Information Center

    Elayeb, Bilel; Evrard, Fabrice; Zaghdoud, Montaceur; Ahmed, Mohamed Ben

    2009-01-01

    Purpose: The purpose of this paper is to make a scientific contribution to web information retrieval (IR). Design/methodology/approach: A multiagent system for web IR is proposed based on new technologies: Hierarchical Small-Worlds (HSW) and Possibilistic Networks (PN). This system is based on a possibilistic qualitative approach which extends the…

  2. Support Vector Machines: Relevance Feedback and Information Retrieval.

    ERIC Educational Resources Information Center

    Drucker, Harris; Shahrary, Behzad; Gibbon, David C.

    2002-01-01

    Compares support vector machines (SVMs) to Rocchio, Ide regular and Ide dec-hi algorithms in information retrieval (IR) of text documents using relevancy feedback. If the preliminary search is so poor that one has to search through many documents to find at least one relevant document, then SVM is preferred. Includes nine tables. (Contains 24…

  3. Crossover Improvement for the Genetic Algorithm in Information Retrieval.

    ERIC Educational Resources Information Center

    Vrajitoru, Dana

    1998-01-01

    In information retrieval (IR), the aim of genetic algorithms (GA) is to help a system to find, in a huge documents collection, a good reply to a query expressed by the user. Analysis of phenomena seen during the implementation of a GA for IR has led to a new crossover operation, which is introduced and compared to other learning methods.…

  4. Information Retrieval Using UMLS-based Structured Queries

    PubMed Central

    Fagan, Lawrence M.; Berrios, Daniel C.; Chan, Albert; Cucina, Russell; Datta, Anupam; Shah, Maulik; Surendran, Sujith

    2001-01-01

    During the last three years, we have developed and described components of ELBook, a semantically based information-retrieval system [1-4]. Using these components, domain experts can specify a query model, indexers can use the query model to index documents, and end-users can search these documents for instances of indexed queries.

  5. Conventional and Knowledge-Based Information Retrieval with Prolog.

    ERIC Educational Resources Information Center

    Leigh, William; Paz, Noemi

    1988-01-01

    Describes the use of PROLOG to program knowledge-based information retrieval systems, in which the knowledge contained in a document is translated into machine processable logic. Several examples of the resulting search process, and the program rules supporting the process, are given. (10 references) (CLB)

  6. "BRAIN": Baruch Retrieval of Automated Information for Negotiations.

    ERIC Educational Resources Information Center

    Levenstein, Aaron, Ed.

    1981-01-01

    A data processing program that can be used as a research and collective bargaining aid for colleges is briefly described and the fields of the system are outlined. The system, known as BRAIN (Baruch Retrieval of Automated Information for Negotiations), is designed primarily as an instrument for quantitative and qualitative analysis. BRAIN consists…

  7. Towards an Intelligent Possibilistic Web Information Retrieval Using Multiagent System

    ERIC Educational Resources Information Center

    Elayeb, Bilel; Evrard, Fabrice; Zaghdoud, Montaceur; Ahmed, Mohamed Ben

    2009-01-01

    Purpose: The purpose of this paper is to make a scientific contribution to web information retrieval (IR). Design/methodology/approach: A multiagent system for web IR is proposed based on new technologies: Hierarchical Small-Worlds (HSW) and Possibilistic Networks (PN). This system is based on a possibilistic qualitative approach which extends the…

  8. Using Imagery to Retrieve Semantic Information: A Developmental Study

    ERIC Educational Resources Information Center

    Kosslyn, Stephen Michael

    1976-01-01

    This is a developmental study of the effects, and role, of imagery in retrieving information from long-term memory. In two blocks of trails, first graders, fourth graders and adults determined whether or not various animals are characterized by various properties, first upon consultation of a visual image and then without imagery. (Author/SB)

  9. Pittsburgh School Gets Energized.

    ERIC Educational Resources Information Center

    Hill, Willliam W.

    2002-01-01

    Describes a project designed to create an energy efficient high school in the diocese of Pittsburgh. The project will save over $850,000 in energy, operations, and maintenance costs over fifteen years. The design improves the physical premises as well by adding windows and eliminating fluorescent lighting. Offers tips for developing similar…

  10. Our Pittsburgh Constellation

    NASA Astrophysics Data System (ADS)

    Turnshek, Diane

    2015-08-01

    Riding on the Pittsburgh mayor’s keen interest in astronomy and the ongoing change of 40,000 city lights from mercury and sodium vapor to shielded LEDs, we organized a series of city-wide celestial art projects to bring attention to the skies over Pittsburgh. Light pollution public talks were held at the University of Pittsburgh’s Allegheny Observatory and other colleges. Earth Hour celebrations kicked off an intensive year of astronomy outreach in the city. Lights went out on March 28, 2015 from 8:30 to 9:30 pm in over fifty buildings downtown and in Oakland (the “Eds and Meds” center, where many Pittsburgh universities and hospitals are located). Our art contest was announced at the De-Light Pittsburgh celebration at the Carnegie Science Center during Astronomy Weekend. “Our Pittsburgh Constellation” is an interactive Google map of all things astronomical in the city. Different colored stars mark locations of planetariums, star parties, classes, observatories, lecture series, museums, telescope manufacturers and participating art galleries. Contest entrants submitted artwork depicting their vision of the constellation figure that incorporates and connects all the “stars” in our custom city map. Throughout the year, over a dozen artists ran workshops on painting star clusters, galaxies, nebulae, comets, planets and aurorae with discussions of light pollution solutions and scientific explanations of what the patrons were painting, including demonstrations with emission tubes and diffraction grating glasses. We will display the celestial art created in this International Year of Light at an art gallery as part of the City’s Department of Innovation & Performance March 2016 Earth Hour gala. We are thankful for the Astronomical Footprint grant from the Heinz Endowments, which allowed us to bring the worlds of science and art together to enact social change.

  11. JOIS-III JICST's new online information retrieval system (2)

    NASA Astrophysics Data System (ADS)

    Hamanaka, Hisashi; Hosoyama, Miki; Shimizu, Hideaki; Okura, Katsumi; Motoyama, Noriyuki

    We give an outline of JOIS (JICST On-line Information System) - III, which has been developed as a succession to JOIS-II now being on service by the Japan Information Center of Science and Technology to start servicing in January 1990. In this report we explain mainly about new retrieval functions such as multiple file searches and proximity searching. (1st part Vol. 32. No. 3, 3rd part Vol. 32. No. 5)

  12. Design and implementation of distributed information retrieval system

    NASA Astrophysics Data System (ADS)

    Liu, Haishu

    2013-07-01

    For the lack of robustness and scalability in the existing centralized search engine implementation, this paper presents a distributed information retrieval service system model based on search engine technology. This model can real-t imely monitor the specified information source to collect the latest informat ion in the first time and process it, for users to search, and the design is distributed, can make the system have good robustness and scalability through mutual cooperation of background nodes.

  13. Software Helps Retrieve Information Relevant to the User

    NASA Technical Reports Server (NTRS)

    Mathe, Natalie; Chen, James

    2003-01-01

    The Adaptive Indexing and Retrieval Agent (ARNIE) is a code library, designed to be used by an application program, that assists human users in retrieving desired information in a hypertext setting. Using ARNIE, the program implements a computational model for interactively learning what information each human user considers relevant in context. The model, called a "relevance network," incrementally adapts retrieved information to users individual profiles on the basis of feedback from the users regarding specific queries. The model also generalizes such knowledge for subsequent derivation of relevant references for similar queries and profiles, thereby, assisting users in filtering information by relevance. ARNIE thus enables users to categorize and share information of interest in various contexts. ARNIE encodes the relevance and structure of information in a neural network dynamically configured with a genetic algorithm. ARNIE maintains an internal database, wherein it saves associations, and from which it returns associated items in response to a query. A C++ compiler for a platform on which ARNIE will be utilized is necessary for creating the ARNIE library but is not necessary for the execution of the software.

  14. Use of information-retrieval languages in automated retrieval of experimental data from long-term storage

    NASA Technical Reports Server (NTRS)

    Khovanskiy, Y. D.; Kremneva, N. I.

    1975-01-01

    Problems and methods are discussed of automating information retrieval operations in a data bank used for long term storage and retrieval of data from scientific experiments. Existing information retrieval languages are analyzed along with those being developed. The results of studies discussing the application of the descriptive 'Kristall' language used in the 'ASIOR' automated information retrieval system are presented. The development and use of a specialized language of the classification-descriptive type, using universal decimal classification indices as the main descriptors, is described.

  15. Use of information-retrieval languages in automated retrieval of experimental data from long-term storage

    NASA Technical Reports Server (NTRS)

    Khovanskiy, Y. D.; Kremneva, N. I.

    1975-01-01

    Problems and methods are discussed of automating information retrieval operations in a data bank used for long term storage and retrieval of data from scientific experiments. Existing information retrieval languages are analyzed along with those being developed. The results of studies discussing the application of the descriptive 'Kristall' language used in the 'ASIOR' automated information retrieval system are presented. The development and use of a specialized language of the classification-descriptive type, using universal decimal classification indices as the main descriptors, is described.

  16. JOIS-III JICST's new online information retrieval system (1)

    NASA Astrophysics Data System (ADS)

    Hamanaka, Hisashi; Hosoyama, Miki; Shimizu, Hideaki; Okura, Katsumi; Motoyama, Noriyuki

    We give an outline of JOIS (JICST On-line Information System) - III, which has been developed as a succession to JOIS-II now being on service by The Japan Information Center of Science and Technology to start servicing in January 1990. JOIS-III is an on-line information retrieval system intended to be a totally up-graded JOIS-II with functional expansion, well-provided data base and high-speed processing of large quantity of data. We also refer to structures of files to be retrieved such as bit-map file, which has been introduced to cope with large-sized data base, and group structure. (2nd part Vol. 32. No.4, 3rd part Vol. 32. No.5)

  17. Speech-recognition interfaces for music information retrieval

    NASA Astrophysics Data System (ADS)

    Goto, Masataka

    2005-09-01

    This paper describes two hands-free music information retrieval (MIR) systems that enable a user to retrieve and play back a musical piece by saying its title or the artist's name. Although various interfaces for MIR have been proposed, speech-recognition interfaces suitable for retrieving musical pieces have not been studied. Our MIR-based jukebox systems employ two different speech-recognition interfaces for MIR, speech completion and speech spotter, which exploit intentionally controlled nonverbal speech information in original ways. The first is a music retrieval system with the speech-completion interface that is suitable for music stores and car-driving situations. When a user only remembers part of the name of a musical piece or an artist and utters only a remembered fragment, the system helps the user recall and enter the name by completing the fragment. The second is a background-music playback system with the speech-spotter interface that can enrich human-human conversation. When a user is talking to another person, the system allows the user to enter voice commands for music playback control by spotting a special voice-command utterance in face-to-face or telephone conversations. Experimental results from use of these systems have demonstrated the effectiveness of the speech-completion and speech-spotter interfaces. (Video clips: http://staff.aist.go.jp/m.goto/MIR/speech-if.html)

  18. Semantic concept-enriched dependence model for medical information retrieval.

    PubMed

    Choi, Sungbin; Choi, Jinwook; Yoo, Sooyoung; Kim, Heechun; Lee, Youngho

    2014-02-01

    In medical information retrieval research, semantic resources have been mostly used by expanding the original query terms or estimating the concept importance weight. However, implicit term-dependency information contained in semantic concept terms has been overlooked or at least underused in most previous studies. In this study, we incorporate a semantic concept-based term-dependence feature into a formal retrieval model to improve its ranking performance. Standardized medical concept terms used by medical professionals were assumed to have implicit dependency within the same concept. We hypothesized that, by elaborately revising the ranking algorithms to favor documents that preserve those implicit dependencies, the ranking performance could be improved. The implicit dependence features are harvested from the original query using MetaMap. These semantic concept-based dependence features were incorporated into a semantic concept-enriched dependence model (SCDM). We designed four different variants of the model, with each variant having distinct characteristics in the feature formulation method. We performed leave-one-out cross validations on both a clinical document corpus (TREC Medical records track) and a medical literature corpus (OHSUMED), which are representative test collections in medical information retrieval research. Our semantic concept-enriched dependence model consistently outperformed other state-of-the-art retrieval methods. Analysis shows that the performance gain has occurred independently of the concept's explicit importance in the query. By capturing implicit knowledge with regard to the query term relationships and incorporating them into a ranking model, we could build a more robust and effective retrieval model, independent of the concept importance. Copyright © 2013 Elsevier Inc. All rights reserved.

  19. Software for Information Storage and Retrieval Tested, Evaluated and Compared. Part 1. General Introduction.

    ERIC Educational Resources Information Center

    Sieverts, Eric G.; Hofstede, Marten

    1991-01-01

    Five categories of microcomputer software for information storage and retrieval (ISR) are distinguished and characterized: classical retrieval systems; end-user software; indexing programs; full-text retrieval programs; and personal information managers. In addition, the special retrieval techniques of hypertext and best-matched searching are…

  20. A prompt information retrieval system on handheld devices

    NASA Astrophysics Data System (ADS)

    Huang, Yo-Ping; Yen, Wei; Lin, Shi-Hung

    2007-04-01

    In this paper, we propose an intelligent bird information retrieval system which aims to construct a mobility-learning activity under the up-to-date wireless technology. The system consists of a Tablet PC and PDAs with wireless networking capabilities. The PDA is equipped with a friendly retrieval interface and a good learning environment. In our system, users only need to click the buttons or input the keywords to retrieve bird information. Besides, users can discuss or share their information and knowledge via the wireless network. Our system saves bird information in four categories including "Introduction," "Images," "Sound," "Streaming Media," and "Ecological Memo." The integral knowledge helps users understand more about birds. Data mining and fuzzy association rules are applied to recommend users those birds they may be interested in. A streaming server on the Tablet PC is built to provide the streaming media for PDA users. By this way, PDA users can enjoy the multimedia from Tablet PC in real time without downloading completely. Finally, the system is a perfect tool for outdoor teaching and can be easily extended to provide navigation and touring services for national parks or museums.

  1. Software for Information Storage and Retrieval Tested, Evaluated and Compared. Part IV--Indexing and Full Text Retrieval Programs.

    ERIC Educational Resources Information Center

    Sieverts, Eric G.; And Others

    1992-01-01

    The fourth in a series of articles on the evaluation of microcomputer software for information storage and retrieval, conducted by the Netherlands Association of Users of Online Information Systems (VOGIN), presents test results for six indexing and full-text retrieval programs--Ask-It, KAware, Texplore, TextMaster, WordCruncher, and ZYindex. (13…

  2. Software for Information Storage and Retrieval Tested, Evaluated and Compared. Part IV--Indexing and Full Text Retrieval Programs.

    ERIC Educational Resources Information Center

    Sieverts, Eric G.; And Others

    1992-01-01

    The fourth in a series of articles on the evaluation of microcomputer software for information storage and retrieval, conducted by the Netherlands Association of Users of Online Information Systems (VOGIN), presents test results for six indexing and full-text retrieval programs--Ask-It, KAware, Texplore, TextMaster, WordCruncher, and ZYindex. (13…

  3. Information retrieval for a document writing assistance program

    SciTech Connect

    Corral, M.L.; Simon, A.; Julien, C.

    1994-12-31

    This paper presents an Information Retrieval mechanism to facilitate the writing of technical documents in the space domain. To address the need for document exchange between partners in a given project, documents are standardized. The writing of a new document requires the re-use of existing documents or parts thereof. These parts can be identified by {open_quotes}tagging{close_quotes} the logical structure of documents and restored by means of a purpose-built Information Retrieval System (I.R.S.). The I.R.S. implemented in our writing assistance tool uses natural language queries and is based on a statistical linguistic approach which is enhanced by the use of document structure module.

  4. Data mining approaches for information retrieval from genomic databases

    NASA Astrophysics Data System (ADS)

    Liu, Donglin; Singh, Gautam B.

    2000-04-01

    Sequence retrieval in genomic databases is used for finding sequences related to a query sequence specified by a user. Comparison is the main part of the retrieval system in genomic databases. An efficient sequence comparison algorithm is critical in bioinformatics. There are several different algorithms to perform sequence comparison, such as the suffix array based database search, divergence measurement, methods that rely upon the existence of a local similarity between the query sequence and sequences in the database, or common mutual information between query and sequences in DB. In this paper we have described a new method for DNA sequence retrieval based on data mining techniques. Data mining tools generally find patterns among data and have been successfully applied in industries to improve marketing, sales, and customer support operations. We have applied the descriptive data mining techniques to find relevant patterns that are significant for comparing genetic sequences. Relevance feedback score based on common patterns is developed and employed to compute distance between sequences. The contigs of human chromosomes are used to test the retrieval accuracy and the experimental results are presented.

  5. Informative Top-k Retrieval for Advanced Skill Management

    NASA Astrophysics Data System (ADS)

    Colucci, Simona; di Noia, Tommaso; Ragone, Azzurra; Ruta, Michele; Straccia, Umberto; Tinelli, Eufemia

    The paper presents a knowledge-based framework for skills and talent management based on an advanced matchmaking between profiles of candidates and available job positions. Interestingly, informative content of top-k retrieval is enriched through semantic capabilities. The proposed approach allows to: (1) express a requested profile in terms of both hard constraints and soft ones; (2) provide a ranking function based also on qualitative attributes of a profile; (3) explain the resulting outcomes (given a job request, a motivation for the obtained score of each selected profile is provided). Top-k retrieval allows to select most promising candidates according to an ontology formalizing the domain knowledge. Such a knowledge is further exploited to provide a semantic-based explanation of missing or conflicting features in retrieved profiles. They also indicate additional profile characteristics emerging by the retrieval procedure for a further request refinement. A concrete case study followed by an exhaustive experimental campaign is reported to prove the approach effectiveness.

  6. [SIBIL: an information tool for the information retrieval on bioethics].

    PubMed

    Dracos, Adriana

    2004-01-01

    The article describes the main features of the website SIBIL (Sistema Informativo per la Bioetica In Linea) implemented within the framework of a research project of the ISS for collecting, indexing and disseminating Italian literature on bioethics since 1995 through an integrated electronic system. The site, addressed to a wide range of people interested at different degrees and levels in bioethics, offers a comprehensive overview of the activities, such as courses and meetings, on the major ethical issues at stake in Italy, as well as a survey of the most important activities both at national and international level. The main feature of SIBIL is a database of a large collection of documents retrieved through sources or exploitation of the most important international electronic databases. A thesaurus of 1,600 terms, available in Italian and English, was created in order to organize documents with standardized criteria currently adopted in the Italian scientific environment. Future trends of the website are also discussed for sharing experiences with other countries and laying the basis for a European portal on bioethics.

  7. Models of a Distributed Information Retrieval System Based on Thesauri with Weights.

    ERIC Educational Resources Information Center

    Mazur, Zygmunt

    1994-01-01

    Discusses distributed information retrieval systems that take into account the weights of descriptors from thesauri. Topics addressed include a mathematical model for information retrieval subsystems; organization of inverted files; models for the distributed homogeneous information systems; a distributed information retrieval system based on…

  8. Towards Collaboration between Information Seeking and Information Retrieval

    ERIC Educational Resources Information Center

    Kuhlthau, Carol C.

    2005-01-01

    Introduction: The conceptual framework of librarianship and information science has developed rapidly over the past decade with the prospect of application in other fields. However, transfer of concepts across branches within the field remains problematic and severely limits ability to address important information problems. Requirements: A…

  9. Information Retrieval and Text Mining Technologies for Chemistry.

    PubMed

    Krallinger, Martin; Rabal, Obdulia; Lourenço, Anália; Oyarzabal, Julen; Valencia, Alfonso

    2017-06-28

    Efficient access to chemical information contained in scientific literature, patents, technical reports, or the web is a pressing need shared by researchers and patent attorneys from different chemical disciplines. Retrieval of important chemical information in most cases starts with finding relevant documents for a particular chemical compound or family. Targeted retrieval of chemical documents is closely connected to the automatic recognition of chemical entities in the text, which commonly involves the extraction of the entire list of chemicals mentioned in a document, including any associated information. In this Review, we provide a comprehensive and in-depth description of fundamental concepts, technical implementations, and current technologies for meeting these information demands. A strong focus is placed on community challenges addressing systems performance, more particularly CHEMDNER and CHEMDNER patents tasks of BioCreative IV and V, respectively. Considering the growing interest in the construction of automatically annotated chemical knowledge bases that integrate chemical information and biological data, cheminformatics approaches for mapping the extracted chemical names into chemical structures and their subsequent annotation together with text mining applications for linking chemistry with biological information are also presented. Finally, future trends and current challenges are highlighted as a roadmap proposal for research in this emerging field.

  10. Predicting DataSpace Retrieval Using Probabilistic Hidden Information

    NASA Astrophysics Data System (ADS)

    Fanzou Tchuissang, Gile Narcisse; Wang, Ning; Kuicheu, Nathalie Cindy; Siewe, Francois; Xu, De; Liu, Shuoyan

    This paper discusses the issues involved in the design of a complete information retrieval system for DataSpace based on user relevance probabilistic schemes. First, Information Hidden Model (IHM) is constructed taking into account the users' perception of similarity between documents. The system accumulates feedback from the users and employs it to construct user oriented clusters. IHM allows integrating uncertainty over multiple, interdependent classifications and collectively determines the most likely global assignment. Second, Three different learning strategies are proposed, namely query-related UHH, UHB and UHS (User Hidden Habit, User Hidden Background, and User Hidden keyword Semantics) to closely represent the user mind. Finally, the probability ranking principle shows that optimum retrieval quality can be achieved under certain assumptions. An optimization algorithm to improve the effectiveness of the probabilistic process is developed. We first predict the data sources where the query results could be found. Therefor, compared with existing approaches, our precision of retrieval is better and do not depend on the size and the DataSpace heterogeneity.

  11. Estimating Missing Features to Improve Multimedia Information Retrieval

    SciTech Connect

    Bagherjeiran, A; Love, N S; Kamath, C

    2006-09-28

    Retrieval in a multimedia database usually involves combining information from different modalities of data, such as text and images. However, all modalities of the data may not be available to form the query. The retrieval results from such a partial query are often less than satisfactory. In this paper, we present an approach to complete a partial query by estimating the missing features in the query. Our experiments with a database of images and their associated captions show that, with an initial text-only query, our completion method has similar performance to a full query with both image and text features. In addition, when we use relevance feedback, our approach outperforms the results obtained using a full query.

  12. An integrated information retrieval and document management system

    NASA Technical Reports Server (NTRS)

    Coles, L. Stephen; Alvarez, J. Fernando; Chen, James; Chen, William; Cheung, Lai-Mei; Clancy, Susan; Wong, Alexis

    1993-01-01

    This paper describes the requirements and prototype development for an intelligent document management and information retrieval system that will be capable of handling millions of pages of text or other data. Technologies for scanning, Optical Character Recognition (OCR), magneto-optical storage, and multiplatform retrieval using a Standard Query Language (SQL) will be discussed. The semantic ambiguity inherent in the English language is somewhat compensated-for through the use of coefficients or weighting factors for partial synonyms. Such coefficients are used both for defining structured query trees for routine queries and for establishing long-term interest profiles that can be used on a regular basis to alert individual users to the presence of relevant documents that may have just arrived from an external source, such as a news wire service. Although this attempt at evidential reasoning is limited in comparison with the latest developments in AI Expert Systems technology, it has the advantage of being commercially available.

  13. On-Demand Associative Cross-Language Information Retrieval

    NASA Astrophysics Data System (ADS)

    Geraldo, André Pinto; Moreira, Viviane P.; Gonçalves, Marcos A.

    This paper proposes the use of algorithms for mining association rules as an approach for Cross-Language Information Retrieval. These algorithms have been widely used to analyse market basket data. The idea is to map the problem of finding associations between sales items to the problem of finding term translations over a parallel corpus. The proposal was validated by means of experiments using queries in two distinct languages: Portuguese and Finnish to retrieve documents in English. The results show that the performance of our proposed approach is comparable to the performance of the monolingual baseline and to query translation via machine translation, even though these systems employ more complex Natural Language Processing techniques. The combination between machine translation and our approach yielded the best results, even outperforming the monolingual baseline.

  14. Knowledge Acquisition of Generic Queries for Information Retrieval

    PubMed Central

    Seol, Yoon-Ho; Johnson, Stephen B.; Cimino, James J.

    2002-01-01

    Several studies have identified clinical questions posed by health care professionals to understand the nature of information needs during clinical practice. To support access to digital information sources, it is necessary to integrate the information needs with a computer system. We have developed a conceptual guidance approach in information retrieval, based on a knowledge base that contains the patterns of information needs. The knowledge base uses a formal representation of clinical questions based on the UMLS knowledge sources, called the Generic Query model. To improve the coverage of the knowledge base, we investigated a method for extracting plausible clinical questions from the medical literature. This poster presents the Generic Query model, shows how it is used to represent the patterns of clinical questions, and describes the framework used to extract knowledge from the medical literature.

  15. Tetrahydrocannabinol (THC) impairs encoding but not retrieval of verbal information.

    PubMed

    Ranganathan, Mohini; Radhakrishnan, Rajiv; Addy, Peter H; Schnakenberg-Martin, Ashley M; Williams, Ashley H; Carbuto, Michelle; Elander, Jacqueline; Pittman, Brian; Andrew Sewell, R; Skosnik, Patrick D; D'Souza, Deepak Cyril

    2017-10-03

    Cannabis and agonists of the brain cannabinoid receptor (CB1R) produce acute memory impairments in humans. However, the extent to which cannabinoids impair the component processes of encoding and retrieval has not been established in humans. The objective of this analysis was to determine whether the administration of Δ(9)-Tetrahydrocannabinol (THC), the principal psychoactive constituent of cannabis, impairs encoding and/or retrieval of verbal information. Healthy subjects were recruited from the community. Subjects were administered the Rey-Auditory Verbal Learning Test (RAVLT) either before administration of THC (experiment #1) (n=38) or while under the influence of THC (experiment #2) (n=57). Immediate and delayed recall on the RAVLT was compared. Subjects received intravenous THC, in a placebo-controlled, double-blind, randomized manner at doses known to produce behavioral and subjective effects consistent with cannabis intoxication. Total immediate recall, short delayed recall, and long delayed recall were reduced in a statistically significant manner only when the RAVLT was administered to subjects while they were under the influence of THC (experiment #2) and not when the RAVLT was administered prior. THC acutely interferes with encoding of verbal memory without interfering with retrieval. These data suggest that learning information prior to the use of cannabis or cannabinoids is not likely to disrupt recall of that information. Future studies will be necessary to determine whether THC impairs encoding of non-verbal information, to what extent THC impairs memory consolidation, and the role of other cannabinoids in the memory-impairing effects of cannabis. Cannabinoids, Neural Synchrony, and Information Processing (THC-Gamma) http://clinicaltrials.gov/ct2/show/study/NCT00708994 NCT00708994 Pharmacogenetics of Cannabinoid Response http://clinicaltrials.gov/ct2/show/NCT00678730 NCT00678730. Copyright © 2017. Published by Elsevier Inc.

  16. Relevance similarity: an alternative means to monitor information retrieval systems

    PubMed Central

    Dong, Peng; Loh, Marie; Mondry, Adrian

    2005-01-01

    Background Relevance assessment is a major problem in the evaluation of information retrieval systems. The work presented here introduces a new parameter, "Relevance Similarity", for the measurement of the variation of relevance assessment. In a situation where individual assessment can be compared with a gold standard, this parameter is used to study the effect of such variation on the performance of a medical information retrieval system. In such a setting, Relevance Similarity is the ratio of assessors who rank a given document same as the gold standard over the total number of assessors in the group. Methods The study was carried out on a collection of Critically Appraised Topics (CATs). Twelve volunteers were divided into two groups of people according to their domain knowledge. They assessed the relevance of retrieved topics obtained by querying a meta-search engine with ten keywords related to medical science. Their assessments were compared to the gold standard assessment, and Relevance Similarities were calculated as the ratio of positive concordance with the gold standard for each topic. Results The similarity comparison among groups showed that a higher degree of agreements exists among evaluators with more subject knowledge. The performance of the retrieval system was not significantly different as a result of the variations in relevance assessment in this particular query set. Conclusion In assessment situations where evaluators can be compared to a gold standard, Relevance Similarity provides an alternative evaluation technique to the commonly used kappa scores, which may give paradoxically low scores in highly biased situations such as document repositories containing large quantities of relevant data. PMID:16029513

  17. ERIC Online Retrieval System. Use of the DIALOG Online Information Retrieval System with ERIC Research in Education Files. Final Report.

    ERIC Educational Resources Information Center

    Summit, Roger K.

    The utility of computer based on-line retrieval of material from the ERIC document files was tested by members of the ERIC Clearinghouse on Educational Media and Technology at Stanford University and by the Region IX office of the U.S. Office of Education in San Francisco. The DIALOG retrieval system developed by the Information Sciences Group of…

  18. Diffused holographic information storage and retrieval using photorefractive optical materials

    NASA Astrophysics Data System (ADS)

    McMillen, Deanna Kay

    Holography offers a tremendous opportunity for dense information storage, theoretically one bit per cubic wavelength of material volume, with rapid retrieval, of up to thousands of pages of information simultaneously. However, many factors prevent the theoretical storage limit from being reached, including dynamic range problems and imperfections in recording materials. This research explores new ways of moving closer to practical holographic information storage and retrieval by altering the recording materials, in this case, photorefractive crystals, and by increasing the current storage capacity while improving the information retrieved. As an experimental example of the techniques developed, the information retrieved is the correlation peak from an optical recognition architecture, but the materials and methods developed are applicable to many other holographic information storage systems. Optical correlators can potentially solve any signal or image recognition problem. Military surveillance, fingerprint identification for law enforcement or employee identification, and video games are but a few examples of applications. A major obstacle keeping optical correlators from being universally accepted is the lack of a high quality, thick (high capacity) holographic recording material that operates with red or infrared wavelengths which are available from inexpensive diode lasers. This research addresses the problems from two positions: find a better material for use with diode lasers, and reduce the requirements placed on the material while maintaining an efficient and effective system. This research found that the solutions are new dopants introduced into photorefractive lithium niobate to improve wavelength sensitivities and the use of a novel inexpensive diffuser that reduces the dynamic range and optical element quality requirements (which reduces the cost) while improving performance. A uniquely doped set of 12 lithium niobate crystals was specified and

  19. ERISTAR: Earth Resources Information Storage, Transformation, Analysis, and Retrieval

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The National Aeronautics and Space Administration (NASA) and the American Society for Engineering Education (ASEE) have sponsored faculty fellowship programs in systems engineering design for the past several years. During the summer of 1972 four such programs were conducted by NASA, with Auburn University cooperating with Marshall Space Flight Center (MSFC). The subject for the Auburn-MSFC design group was ERISTAR, an acronym for Earth Resources Information Storage, Transformation, Analysis and Retrieval, which represents an earth resources information management network of state information centers administered by the respective states and linked to federally administered regional centers and a national center. The considerations for serving the users and the considerations that must be given to processing data from a variety of sources are described. The combination of these elements into a national network is discussed and an implementation plan is proposed for a prototype state information center. The compatibility of the proposed plan with the Department of Interior plan, RALI, is indicated.

  20. Key words and their role in information retrieval.

    PubMed

    Grant, Maria J

    2010-09-01

    As any good library or information worker knows the accurate and consistent application of keywords can serve to enhance the content representation and retrieval of literature. Research has demonstrated that this aspect of the library and information science evidence base is particularly well represented. Drawing on the thesauri of the Library & Science Abstracts, Library, Information Science & Technology Abstracts and medline databases, the Health Information and Libraries Journal (HILJ) has recently updated and expanded the HILJ keyword list. Based on the content of reviews and original articles published in HILJ over the past 4 years, the keyword list will be used by submitting authors to represent the content of the manuscripts and enable more accurate matching of manuscript to HILJ referees.

  1. Web multimedia information retrieval using improved Bayesian algorithm.

    PubMed

    Yu, Yi-Jun; Chen, Chun; Yu, Yi-Min; Lin, Huai-Zhong

    2003-01-01

    The main thrust of this paper is application of a novel data mining approach on the log of user's feedback to improve web multimedia information retrieval performance. A user space model was constructed based on data mining, and then integrated into the original information space model to improve the accuracy of the new information space model. It can remove clutter and irrelevant text information and help to eliminate mismatch between the page author's expression and the user's understanding and expectation. User space model was also utilized to discover the relationship between high-level and low-level features for assigning weight. The authors proposed improved Bayesian algorithm for data mining. Experiment proved that the authors' proposed algorithm was efficient.

  2. Information Content of Aerosol Retrievals in the Sunglint Region

    NASA Technical Reports Server (NTRS)

    Ottaviani, M.; Knobelspiesse, K.; Cairns, B.; Mishchenko, M.

    2013-01-01

    We exploit quantitative metrics to investigate the information content in retrievals of atmospheric aerosol parameters (with a focus on single-scattering albedo), contained in multi-angle and multi-spectral measurements with sufficient dynamical range in the sunglint region. The simulations are performed for two classes of maritime aerosols with optical and microphysical properties compiled from measurements of the Aerosol Robotic Network. The information content is assessed using the inverse formalism and is compared to that deriving from observations not affected by sunglint. We find that there indeed is additional information in measurements containing sunglint, not just for single-scattering albedo, but also for aerosol optical thickness and the complex refractive index of the fine aerosol size mode, although the amount of additional information varies with aerosol type.

  3. Secure quantum private information retrieval using phase-encoded queries

    SciTech Connect

    Olejnik, Lukasz

    2011-08-15

    We propose a quantum solution to the classical private information retrieval (PIR) problem, which allows one to query a database in a private manner. The protocol offers privacy thresholds and allows the user to obtain information from a database in a way that offers the potential adversary, in this model the database owner, no possibility of deterministically establishing the query contents. This protocol may also be viewed as a solution to the symmetrically private information retrieval problem in that it can offer database security (inability for a querying user to steal its contents). Compared to classical solutions, the protocol offers substantial improvement in terms of communication complexity. In comparison with the recent quantum private queries [Phys. Rev. Lett. 100, 230502 (2008)] protocol, it is more efficient in terms of communication complexity and the number of rounds, while offering a clear privacy parameter. We discuss the security of the protocol and analyze its strengths and conclude that using this technique makes it challenging to obtain the unconditional (in the information-theoretic sense) privacy degree; nevertheless, in addition to being simple, the protocol still offers a privacy level. The oracle used in the protocol is inspired both by the classical computational PIR solutions as well as the Deutsch-Jozsa oracle.

  4. Secure quantum private information retrieval using phase-encoded queries

    NASA Astrophysics Data System (ADS)

    Olejnik, Lukasz

    2011-08-01

    We propose a quantum solution to the classical private information retrieval (PIR) problem, which allows one to query a database in a private manner. The protocol offers privacy thresholds and allows the user to obtain information from a database in a way that offers the potential adversary, in this model the database owner, no possibility of deterministically establishing the query contents. This protocol may also be viewed as a solution to the symmetrically private information retrieval problem in that it can offer database security (inability for a querying user to steal its contents). Compared to classical solutions, the protocol offers substantial improvement in terms of communication complexity. In comparison with the recent quantum private queries [Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.100.230502 100, 230502 (2008)] protocol, it is more efficient in terms of communication complexity and the number of rounds, while offering a clear privacy parameter. We discuss the security of the protocol and analyze its strengths and conclude that using this technique makes it challenging to obtain the unconditional (in the information-theoretic sense) privacy degree; nevertheless, in addition to being simple, the protocol still offers a privacy level. The oracle used in the protocol is inspired both by the classical computational PIR solutions as well as the Deutsch-Jozsa oracle.

  5. 42 CFR 433.116 - FFP for operation of mechanized claims processing and information retrieval systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... and information retrieval systems. 433.116 Section 433.116 Public Health CENTERS FOR MEDICARE... FISCAL ADMINISTRATION Mechanized Claims Processing and Information Retrieval Systems § 433.116 FFP for operation of mechanized claims processing and information retrieval systems. (a) Subject to paragraph (j)...

  6. 42 CFR 433.116 - FFP for operation of mechanized claims processing and information retrieval systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... and information retrieval systems. 433.116 Section 433.116 Public Health CENTERS FOR MEDICARE... FISCAL ADMINISTRATION Mechanized Claims Processing and Information Retrieval Systems § 433.116 FFP for operation of mechanized claims processing and information retrieval systems. (a) Subject to paragraph (j)...

  7. 15 CFR 950.9 - Computerized Environmental Data and Information Retrieval Service.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Information Retrieval Service. 950.9 Section 950.9 Commerce and Foreign Trade Regulations Relating to Commerce... Computerized Environmental Data and Information Retrieval Service. The Environmental Data Index (ENDEX... computerized, information retrieval service provides a parallel subject-author-abstract referral service....

  8. 42 CFR 433.116 - FFP for operation of mechanized claims processing and information retrieval systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... and information retrieval systems. 433.116 Section 433.116 Public Health CENTERS FOR MEDICARE... FISCAL ADMINISTRATION Mechanized Claims Processing and Information Retrieval Systems § 433.116 FFP for operation of mechanized claims processing and information retrieval systems. (a) Subject to paragraph (j)...

  9. 42 CFR 433.116 - FFP for operation of mechanized claims processing and information retrieval systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... and information retrieval systems. 433.116 Section 433.116 Public Health CENTERS FOR MEDICARE... FISCAL ADMINISTRATION Mechanized Claims Processing and Information Retrieval Systems § 433.116 FFP for operation of mechanized claims processing and information retrieval systems. (a) Subject to paragraph (j)...

  10. 42 CFR 433.116 - FFP for operation of mechanized claims processing and information retrieval systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... and information retrieval systems. 433.116 Section 433.116 Public Health CENTERS FOR MEDICARE... FISCAL ADMINISTRATION Mechanized Claims Processing and Information Retrieval Systems § 433.116 FFP for operation of mechanized claims processing and information retrieval systems. (a) Subject to 42 CFR...

  11. On Information Retrieval (IR) Systems: Revisiting Their Development, Evaluation Methodologies, and Assumptions (SIGs LAN, ED).

    ERIC Educational Resources Information Center

    Stirling, Keith

    2000-01-01

    Describes a session on information retrieval systems that planned to discuss relevance measures with Web-based information retrieval; retrieval system performance and evaluation; probabilistic independence of index terms; vector-based models; metalanguages and digital objects; how users assess the reliability, timeliness and bias of information;…

  12. The Community Education Project: Pittsburgh, Pennsylvania.

    ERIC Educational Resources Information Center

    Beachler, Judith Anne

    This paper outlines aspects of a community education project, which involved the Community College of Allegheny County (CCAC) and other educational institutions and community service agencies in Pittsburgh in the provision of adult and continuing education and adult and family recreation programs. After section I provides background information on…

  13. The Community Education Project: Pittsburgh, Pennsylvania.

    ERIC Educational Resources Information Center

    Beachler, Judith Anne

    This paper outlines aspects of a community education project, which involved the Community College of Allegheny County (CCAC) and other educational institutions and community service agencies in Pittsburgh in the provision of adult and continuing education and adult and family recreation programs. After section I provides background information on…

  14. Pittsburgh, Pennsylvania: Solar in Action (Brochure)

    SciTech Connect

    Not Available

    2011-10-01

    This brochure provides an overview of the challenges and successes of Pittsburgh, PA, a 2007 Solar America City awardee, on the path toward becoming a solar-powered community. Accomplishments, case studies, key lessons learned, and local resource information are given.

  15. Human Information Behaviour and Design, Development and Evaluation of Information Retrieval Systems

    ERIC Educational Resources Information Center

    Keshavarz, Hamid

    2008-01-01

    Purpose: The purpose of this paper is to introduce the concept of human information behaviour and to explore the relationship between information behaviour of users and the existing approaches dominating design and evaluation of information retrieval (IR) systems and also to describe briefly new design and evaluation methods in which extensive…

  16. Languages and the Information Professions: Implications for the Storage, Management, and Retrieval of Online Information.

    ERIC Educational Resources Information Center

    SantaVicca, Edmund F.

    As more professionals come to rely on computer-based online information systems, knowledge of foreign languages and cultures plays a crucial role in the accurate storage, management, and retrieval of needed information. In the storage and management of information, foreign language knowledge is important in word choice and thesaurus control,…

  17. The Development and Implementation of a Management Information System for an Education Information Retrieval Center.

    ERIC Educational Resources Information Center

    Jegi, John

    A management information system was developed for the Contra Costa County, California, Department of Education's Educational Information Retrieval Center. The system was designed to determine needed operational changes, to measure the effects of these changes, to monitor the center's operation, and to obtain information for dissemination. Data…

  18. Human Information Behaviour and Design, Development and Evaluation of Information Retrieval Systems

    ERIC Educational Resources Information Center

    Keshavarz, Hamid

    2008-01-01

    Purpose: The purpose of this paper is to introduce the concept of human information behaviour and to explore the relationship between information behaviour of users and the existing approaches dominating design and evaluation of information retrieval (IR) systems and also to describe briefly new design and evaluation methods in which extensive…

  19. Computer programs: Information retrieval and data analysis, a compilation

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The items presented in this compilation are divided into two sections. Section one treats of computer usage devoted to the retrieval of information that affords the user rapid entry into voluminous collections of data on a selective basis. Section two is a more generalized collection of computer options for the user who needs to take such data and reduce it to an analytical study within a specific discipline. These programs, routines, and subroutines should prove useful to users who do not have access to more sophisticated and expensive computer software.

  20. Rapid automatic keyword extraction for information retrieval and analysis

    DOEpatents

    Rose, Stuart J [Richland, WA; Cowley,; E, Wendy [Richland, WA; Crow, Vernon L [Richland, WA; Cramer, Nicholas O [Richland, WA

    2012-03-06

    Methods and systems for rapid automatic keyword extraction for information retrieval and analysis. Embodiments can include parsing words in an individual document by delimiters, stop words, or both in order to identify candidate keywords. Word scores for each word within the candidate keywords are then calculated based on a function of co-occurrence degree, co-occurrence frequency, or both. Based on a function of the word scores for words within the candidate keyword, a keyword score is calculated for each of the candidate keywords. A portion of the candidate keywords are then extracted as keywords based, at least in part, on the candidate keywords having the highest keyword scores.

  1. A controlled nursing vocabulary for indexing and information retrieval.

    PubMed

    Pekkala, Eila; Saranto, Kaija; Tallberg, Marianne; Ensio, Anneli; Junttila, Kristiina

    2006-01-01

    The lack of a nursing thesaurus in Finnish has emerged among nursing professionals searching nursing knowledge and librarians when indexing literature to databases. The Finnish Nursing Education Society launched a project focusing on the development of a nursing vocabulary and the compilation of a thesaurus. The content of a vocabulary was created by six experts using Delphi-technique. The validity of the vocabulary was twice tested for indexing nursing research and has afterwards been revised. The vocabulary can be used for indexing and information retrieval purposes. The main challenge is that nurses easily can find national as well as international nursing research from databases and enhance research utilization.

  2. Query by Browsing: An Alternative Hypertext Information Retrieval Method

    PubMed Central

    Frisse, Mark E.; Cousins, Steve B.

    1989-01-01

    In this paper we discuss our efforts to develop programs which enhance the ability to navigate through large medical hypertext systems. Our approach organizes hypertext index terms into a belief network and uses reader feedback to update the degree of belief in the index terms' utility to a query. We begin by describing various possible configurations for indexes to hypertext. We then describe how belief network calculations can be applied to these indexes. After a brief discussion of early results using manuscripts from a medical handbook, we close with an analysis of our approach's applicability to a wider range of hypertext information retrieval problems.

  3. Evaluation methods for retrieving information from interferograms of biomedical objects

    NASA Astrophysics Data System (ADS)

    Podbielska, Halina; Rottenkolber, Matthias

    1996-04-01

    Interferograms in the form of fringe patterns can be produced in two-beam interferometers, holographic or speckle interferometers, in setups realizing moire techniques or in deflectometers. Optical metrology based on the principle of interference can be applied as a testing tool in biomedical research. By analyzing of the fringe pattern images, information about the shape or mechanical behavior of the object under study can be retrieved. Here, some of the techniques for creating fringe pattern images were presented along with methods of analysis. Intensity based analysis as well as methods of phase measurements, are mentioned. Applications of inteferometric methods, especially in the field of experimental orthopedics, endoscopy and ophthalmology are pointed out.

  4. Evaluation of a generalizable approach to clinical information retrieval using the automated retrieval console (ARC)

    PubMed Central

    Nguyen, Thien M; Farwell, Wildon R; Chen, Yongming; Fitzmeyer, Felicia; Harris, Owen M; Fiore, Louis D

    2010-01-01

    Reducing custom software development effort is an important goal in information retrieval (IR). This study evaluated a generalizable approach involving with no custom software or rules development. The study used documents “consistent with cancer” to evaluate system performance in the domains of colorectal (CRC), prostate (PC), and lung (LC) cancer. Using an end-user-supplied reference set, the automated retrieval console (ARC) iteratively calculated performance of combinations of natural language processing-derived features and supervised classification algorithms. Training and testing involved 10-fold cross-validation for three sets of 500 documents each. Performance metrics included recall, precision, and F-measure. Annotation time for five physicians was also measured. Top performing algorithms had recall, precision, and F-measure values as follows: for CRC, 0.90, 0.92, and 0.89, respectively; for PC, 0.97, 0.95, and 0.94; and for LC, 0.76, 0.80, and 0.75. In all but one case, conditional random fields outperformed maximum entropy-based classifiers. Algorithms had good performance without custom code or rules development, but performance varied by specific application. PMID:20595303

  5. Secure Retrieval of FFTF Testing, Design, and Operating Information

    SciTech Connect

    Butner, R. Scott; Wootan, David W.; Omberg, Ronald P.; Makenas, Bruce J.; Nielsen, Deborah

    2009-10-01

    One of the goals of the Advanced Fuel Cycle Initiative (AFCI) is to preserve the knowledge that has been gained in the United States on Liquid Metal Reactors (LMR). In addition, preserving LMR information and knowledge is part of a larger international collaborative activity conducted under the auspices of the International Atomic Energy Agency (IAEA). A similar program is being conducted for EBR-II at the Idaho Nuclear Laboratory (INL) and international programs are also in progress. Knowledge preservation at the FFTF is focused on the areas of design, construction, startup, and operation of the reactor. As the primary function of the FFTF was testing, the focus is also on preserving information obtained from irradiation testing of fuels and materials. This information will be invaluable when, at a later date, international decisions are made to pursue new LMRs. In the interim, this information may be of potential use for international exchanges with other LMR programs around the world. At least as important in the United States, which is emphasizing large-scale computer simulation and modeling, this information provides the basis for creating benchmarks for validating and testing these large scale computer programs. Although the preservation activity with respect to FFTF information as discussed below is still underway, the team of authors above is currently retrieving and providing experimental and design information to the LMR modeling and simulation efforts for use in validating their computer models. On the Hanford Site, the FFTF reactor plant is one of the facilities intended for decontamination and decommissioning consistent with the cleanup mission on this site. The reactor facility has been deactivated and is being maintained in a cold and dark minimal surveillance and maintenance mode until final decommissioning is pursued. In order to ensure protection of information at risk, the program to date has focused on sequestering and secure retrieval

  6. [Retrieval of bioethical information from the SIBIL database].

    PubMed

    Pizzarelli, Scilla; Di Benedetto, Mirko

    2004-01-01

    SIBIL (Italian Online Bioethical Information System) is the database distributed on the net by the Istituto Superiore di Sanita through the homonymous system, conceived for a systematic dissemination of bioethical information, which is scattered in a multitude of informative resources, due to the interdisciplinary nature of the subject. The present work shows the structure and the main features of the database, which aims to provide a regular update on the national ethical debate through the collection of a wide range of documents. Emphasis is laid on the query mechanisms through practical suggestions which may contribute to a more precise searching, thus granting the retrieval of relevant documents. The article also describes the short-term development of the system, which is expected to take part in a European bioethical net in the near future.

  7. JANE, A new information retrieval system for the Radiation Shielding Information Center

    SciTech Connect

    Trubey, D.K.

    1991-05-01

    A new information storage and retrieval system has been developed for the Radiation Shielding Information Center (RSIC) at Oak Ridge National Laboratory to replace mainframe systems that have become obsolete. The database contains citations and abstracts of literature which were selected by RSIC analysts and indexed with terms from a controlled vocabulary. The database, begun in 1963, has been maintained continuously since that time. The new system, called JANE, incorporates automatic indexing techniques and on-line retrieval using the RSIC Data General Eclipse MV/4000 minicomputer, Automatic indexing and retrieval techniques based on fuzzy-set theory allow the presentation of results in order of Retrieval Status Value. The fuzzy-set membership function depends on term frequency in the titles and abstracts and on Term Discrimination Values which indicate the resolving power of the individual terms. These values are determined by the Cover Coefficient method. The use of a commercial database base to store and retrieve the indexing information permits rapid retrieval of the stored documents. Comparisons of the new and presently-used systems for actual searches of the literature indicate that it is practical to replace the mainframe systems with a minicomputer system similar to the present version of JANE. 18 refs., 10 figs.

  8. Mathematical, Logical, and Formal Methods in Information Retrieval: An Introduction to the Special Issue.

    ERIC Educational Resources Information Center

    Crestani, Fabio; Dominich, Sandor; Lalmas, Mounia; van Rijsbergen, Cornelis Joost

    2003-01-01

    Discusses the importance of research on the use of mathematical, logical, and formal methods in information retrieval to help enhance retrieval effectiveness and clarify underlying concepts of information retrieval. Highlights include logic; probability; spaces; and future research needs. (Author/LRW)

  9. Design Issues in a Hypertext-Based Information System for Bibliographic Retrieval.

    ERIC Educational Resources Information Center

    Dimitroff, Alexandra; Wolfram, Dietmar

    1993-01-01

    Describes initial design considerations and implementation issues for a hypertext retrieval system for structured bibliographic data. Previous research on information retrieval and hypertext is reviewed; HyperLynx, a hypertext prototype information retrieval system that emphasized ease of use and browsing capabilities, is explained; and further…

  10. Design Issues in a Hypertext-Based Information System for Bibliographic Retrieval.

    ERIC Educational Resources Information Center

    Dimitroff, Alexandra; Wolfram, Dietmar

    1993-01-01

    Describes initial design considerations and implementation issues for a hypertext retrieval system for structured bibliographic data. Previous research on information retrieval and hypertext is reviewed; HyperLynx, a hypertext prototype information retrieval system that emphasized ease of use and browsing capabilities, is explained; and further…

  11. Mathematical, Logical, and Formal Methods in Information Retrieval: An Introduction to the Special Issue.

    ERIC Educational Resources Information Center

    Crestani, Fabio; Dominich, Sandor; Lalmas, Mounia; van Rijsbergen, Cornelis Joost

    2003-01-01

    Discusses the importance of research on the use of mathematical, logical, and formal methods in information retrieval to help enhance retrieval effectiveness and clarify underlying concepts of information retrieval. Highlights include logic; probability; spaces; and future research needs. (Author/LRW)

  12. SPIRES (Stanford Public Information Retrieval System) 1970-71 Annual Report.

    ERIC Educational Resources Information Center

    Parker, Edwin B.

    SPIRES (Stanford Public Information REtrieval System) is a computer information storage and retrieval system being developed at Stanford University with funding from the National Science Foundation. SPIRES has two major goals: to provide a user-oriented, interactive, on-line retrieval system for a variety of researchers at Stanford; and to support…

  13. Current Research into Chemical and Textual Information Retrieval at the Department of Information Studies, University of Sheffield.

    ERIC Educational Resources Information Center

    Lynch, Michael F.; Willett, Peter

    1987-01-01

    Discusses research into chemical information and document retrieval systems at the University of Sheffield. Highlights include the use of cluster analysis methods for document retrieval and drug design, representation and searching of files of generic chemical structures, and the application of parallel computer hardware to information retrieval.…

  14. An introduction to the Marshall information retrieval and display system

    NASA Technical Reports Server (NTRS)

    1974-01-01

    An on-line terminal oriented data storage and retrieval system is presented which allows a user to extract and process information from stored data bases. The use of on-line terminals for extracting and displaying data from the data bases provides a fast and responsive method for obtaining needed information. The system consists of general purpose computer programs that provide the overall capabilities of the total system. The system can process any number of data files via a Dictionary (one for each file) which describes the data format to the system. New files may be added to the system at any time, and reprogramming is not required. Illustrations of the system are shown, and sample inquiries and responses are given.

  15. A Probabilistic Approach to Information Retrieval in Systems with Boolean Search Request Formulations.

    ERIC Educational Resources Information Center

    Radecki, Tadeusz

    1982-01-01

    Outlines an approach to information retrieval which integrates the existing theory of probabilistic retrieval into a practical methodology based on Boolean searches. Basic concepts, search methodology, and examples of Boolean searching are noted. Twenty-six sources are appended. (EJS)

  16. EarthServer: Information Retrieval and Query Language

    NASA Astrophysics Data System (ADS)

    Perperis, Thanassis; Koltsida, Panagiota; Kakaletris, George

    2013-04-01

    Establishing open, unified, seamless, access and ad-hoc analytics on cross-disciplinary, multi-source, multi-dimensional, spatiotemporal Earth Science data of extreme-size and their supporting metadata are the main challenges of the EarthServer project (www.earthserver.eu), funded by the European Commission under its Seventh Framework Program. One of EarthServer's main objectives is to provide users with higher level coverage and metadata search, retrieval and processing capabilities to multi-disciplinary Earth Science data. Six Lighthouse Applications are being established, each one providing access to Cryospheric, Airborne, Atmospheric, Geology, Oceanography and Planetary science raster data repositories through strictly WCS 2.0 standard based service endpoints. EarthServers' information retrieval subsystem aims towards exploiting the WCS endpoints through a physically and logically distributed service oriented architecture, foreseeing the collaboration of several standard compliant services, capable of exploiting modern large grid and cloud infrastructures and of dynamically responding to availability and capabilities of underlying resources. Towards furthering technology for integrated, coherent service provision based on WCS and WCPS the concept of a query language (QL), unifying coverage and metadata processing and retrieval is introduced. EarthServer's information retrieval subsystem receives QL requests involving high volumes of all Earth Science data categories, executes them on the services that reside on the infrastructure and sends the results back to the requester through a high performance pipeline. In this contribution we briefly discuss EarthServer's service oriented coverage data and metadata search and retrieval architecture and further elaborate on the potentials of EarthServer's Query Language, called xWCPS (XQuery compliant WCPS). xWCPS aims towards merging the path that the two widely adopted standards (W3C XQuery, OGC WCPS) have paved, into a

  17. Bettis Atomic Power Laboratory. Bettis-Pittsburgh Site environmental summary report

    SciTech Connect

    2000-08-01

    This summary report provides a description of the nature and environmental aspects of work and facilities at the Bettis-Pittsburgh site, an historical perspective of Bettis-Pittsburgh operations that is not provided by the annual reports, and background information pertinent to understanding the environmental aspects of Bettis-Pittsburgh operations.

  18. An Integrated Korean Biodiversity and Genetic Information Retrieval System

    PubMed Central

    Lim, Jeongheui; Bhak, Jong; Oh, Hee-Mock; Kim, Chang-Bae; Park, Yong-Ha; Paek, Woon Kee

    2008-01-01

    Background On-line biodiversity information databases are growing quickly and being integrated into general bioinformatics systems due to the advances of fast gene sequencing technologies and the Internet. These can reduce the cost and effort of performing biodiversity surveys and genetic searches, which allows scientists to spend more time researching and less time collecting and maintaining data. This will cause an increased rate of knowledge build-up and improve conservations. The biodiversity databases in Korea have been scattered among several institutes and local natural history museums with incompatible data types. Therefore, a comprehensive database and a nation wide web portal for biodiversity information is necessary in order to integrate diverse information resources, including molecular and genomic databases. Results The Korean Natural History Research Information System (NARIS) was built and serviced as the central biodiversity information system to collect and integrate the biodiversity data of various institutes and natural history museums in Korea. This database aims to be an integrated resource that contains additional biological information, such as genome sequences and molecular level diversity. Currently, twelve institutes and museums in Korea are integrated by the DiGIR (Distributed Generic Information Retrieval) protocol, with Darwin Core2.0 format as its metadata standard for data exchange. Data quality control and statistical analysis functions have been implemented. In particular, integrating molecular and genetic information from the National Center for Biotechnology Information (NCBI) databases with NARIS was recently accomplished. NARIS can also be extended to accommodate other institutes abroad, and the whole system can be exported to establish local biodiversity management servers. Conclusion A Korean data portal, NARIS, has been developed to efficiently manage and utilize biodiversity data, which includes genetic resources. NARIS aims

  19. An integrated Korean biodiversity and genetic information retrieval system.

    PubMed

    Lim, Jeongheui; Bhak, Jong; Oh, Hee-Mock; Kim, Chang-Bae; Park, Yong-Ha; Paek, Woon Kee

    2008-12-12

    On-line biodiversity information databases are growing quickly and being integrated into general bioinformatics systems due to the advances of fast gene sequencing technologies and the Internet. These can reduce the cost and effort of performing biodiversity surveys and genetic searches, which allows scientists to spend more time researching and less time collecting and maintaining data. This will cause an increased rate of knowledge build-up and improve conservations. The biodiversity databases in Korea have been scattered among several institutes and local natural history museums with incompatible data types. Therefore, a comprehensive database and a nation wide web portal for biodiversity information is necessary in order to integrate diverse information resources, including molecular and genomic databases. The Korean Natural History Research Information System (NARIS) was built and serviced as the central biodiversity information system to collect and integrate the biodiversity data of various institutes and natural history museums in Korea. This database aims to be an integrated resource that contains additional biological information, such as genome sequences and molecular level diversity. Currently, twelve institutes and museums in Korea are integrated by the DiGIR (Distributed Generic Information Retrieval) protocol, with Darwin Core2.0 format as its metadata standard for data exchange. Data quality control and statistical analysis functions have been implemented. In particular, integrating molecular and genetic information from the National Center for Biotechnology Information (NCBI) databases with NARIS was recently accomplished. NARIS can also be extended to accommodate other institutes abroad, and the whole system can be exported to establish local biodiversity management servers. A Korean data portal, NARIS, has been developed to efficiently manage and utilize biodiversity data, which includes genetic resources. NARIS aims to be integral in maximizing

  20. Online information retrieval in pharmacy and related fields.

    PubMed

    Perry, C A

    1986-06-01

    Online information retrieval in pharmacy and related fields is described. Factors involved in determining whether to conduct an online search are discussed, including characteristics of appropriate and less suitable topics, advantages and limitations of online searching versus manual searching, and possible types of searches. The process of preparing for an online search, involving the determination of search vocabulary, relevant citations, important authors, time frame, special categories (such as language, publication type, and reviews), and the number of citations needed, as well as choosing a database, is explained. Sample search strategies on MEDLINE and IPA are illustrated to demonstrate the basic search commands and to compare file retrievals on the sample subject. Pharmacy-related bibliographic databases, general-interest databases, end-user search services, and full-text and numeric databases are profiled. Online database searching can be a cost-efficient and flexible alternative to manual literature searching for pharmacists. Although most online searching is currently conducted by librarian-search specialists, end-user searching is a growing trend, as is the availability of full-text databases.

  1. Evaluating the Effectiveness of Information Retrieval Systems Using Simulated Queries.

    ERIC Educational Resources Information Center

    Gordon, Michael D.

    1990-01-01

    Describes a simulation method for estimating recall and fallout in a document retrieval system. Earlier research on simulating document retrieval systems is reviewed, examples are presented of the current method, a probabilistic justification of the method is given, theoretical concerns dealing with retrieval precision are discussed, and further…

  2. Retrieving Quantitative Information of Histone PTMs by Mass Spectrometry.

    PubMed

    Zhang, C; Liu, Y

    2017-01-01

    Posttranslational modifications (PTMs) of histones are one of the main research interests in the rapidly growing field of epigenetics. Accurate and precise quantification of these highly complex histone PTMs is critical for understanding the histone code and the biological significance behind it. It nonetheless remains a major analytical challenge. Mass spectrometry (MS) has been proven as a robust tool in retrieving quantitative information of histone PTMs, and a variety of MS-based quantitative strategies have been successfully developed and employed in basic research as well as clinical studies. In this chapter, we provide an overview for quantitative analysis of histone PTMs, often highly flexible and case dependent, as a primer for future experimental designs. © 2017 Elsevier Inc. All rights reserved.

  3. Use of controlled vocabularies to improve biomedical information retrieval tasks.

    PubMed

    Pasche, Emilie; Gobeill, Julien; Vishnyakova, Dina; Ruch, Patrick; Lovis, Christian

    2013-01-01

    The high heterogeneity of biomedical vocabulary is a major obstacle for information retrieval in large biomedical collections. Therefore, using biomedical controlled vocabularies is crucial for managing these contents. We investigate the impact of query expansion based on controlled vocabularies to improve the effectiveness of two search engines. Our strategy relies on the enrichment of users' queries with additional terms, directly derived from such vocabularies applied to infectious diseases and chemical patents. We observed that query expansion based on pathogen names resulted in improvements of the top-precision of our first search engine, while the normalization of diseases degraded the top-precision. The expansion of chemical entities, which was performed on the second search engine, positively affected the mean average precision. We have shown that query expansion of some types of biomedical entities has a great potential to improve search effectiveness; therefore a fine-tuning of query expansion strategies could help improving the performances of search engines.

  4. Symmetrically private information retrieval based on blind quantum computing

    NASA Astrophysics Data System (ADS)

    Sun, Zhiwei; Yu, Jianping; Wang, Ping; Xu, Lingling

    2015-05-01

    Universal blind quantum computation (UBQC) is a new secure quantum computing protocol which allows a user Alice who does not have any sophisticated quantum technology to delegate her computing to a server Bob without leaking any privacy. Using the features of UBQC, we propose a protocol to achieve symmetrically private information retrieval, which allows a quantum limited Alice to query an item from Bob with a fully fledged quantum computer; meanwhile, the privacy of both parties is preserved. The security of our protocol is based on the assumption that malicious Alice has no quantum computer, which avoids the impossibility proof of Lo. For the honest Alice, she is almost classical and only requires minimal quantum resources to carry out the proposed protocol. Therefore, she does not need any expensive laboratory which can maintain the coherence of complicated quantum experimental setups.

  5. Challenging Conventional Assumptions of Automated Information Retrieval with Real Users: Boolean Searching and Batch Retrieval Evaluations.

    ERIC Educational Resources Information Center

    Hersh, William; Turpin, Andrew; Price, Susan; Kraemer, Dale; Olson, Daniel; Chan, Benjamin; Sacherek, Lynetta

    2001-01-01

    Describes research conducted at the TREC (Text Retrieval Conference) interactive track that compared Boolean and natural language searching, showing they achieved comparable results; and assessed the validity of batch-oriented retrieval evaluations, showing that the results from batch evaluations were not comparable to those obtained in…

  6. Cross-language information retrieval using PARAFAC2.

    SciTech Connect

    Bader, Brett William; Chew, Peter; Abdelali, Ahmed; Kolda, Tamara Gibson

    2007-05-01

    A standard approach to cross-language information retrieval (CLIR) uses Latent Semantic Analysis (LSA) in conjunction with a multilingual parallel aligned corpus. This approach has been shown to be successful in identifying similar documents across languages - or more precisely, retrieving the most similar document in one language to a query in another language. However, the approach has severe drawbacks when applied to a related task, that of clustering documents 'language-independently', so that documents about similar topics end up closest to one another in the semantic space regardless of their language. The problem is that documents are generally more similar to other documents in the same language than they are to documents in a different language, but on the same topic. As a result, when using multilingual LSA, documents will in practice cluster by language, not by topic. We propose a novel application of PARAFAC2 (which is a variant of PARAFAC, a multi-way generalization of the singular value decomposition [SVD]) to overcome this problem. Instead of forming a single multilingual term-by-document matrix which, under LSA, is subjected to SVD, we form an irregular three-way array, each slice of which is a separate term-by-document matrix for a single language in the parallel corpus. The goal is to compute an SVD for each language such that V (the matrix of right singular vectors) is the same across all languages. Effectively, PARAFAC2 imposes the constraint, not present in standard LSA, that the 'concepts' in all documents in the parallel corpus are the same regardless of language. Intuitively, this constraint makes sense, since the whole purpose of using a parallel corpus is that exactly the same concepts are expressed in the translations. We tested this approach by comparing the performance of PARAFAC2 with standard LSA in solving a particular CLIR problem. From our results, we conclude that PARAFAC2 offers a very promising alternative to LSA not only for

  7. The Role of Grammatical Category Information in Spoken Word Retrieval

    PubMed Central

    Duràn, Carolina Palma; Pillon, Agnesa

    2011-01-01

    We investigated the role of lexical syntactic information such as grammatical gender and category in spoken word retrieval processes by using a blocking paradigm in picture and written word naming experiments. In Experiments 1, 3, and 4, we found that the naming of target words (nouns) from pictures or written words was faster when these target words were named within a list where only words from the same grammatical category had to be produced (homogeneous category list: all nouns) than when they had to be produced within a list comprising also words from another grammatical category (heterogeneous category list: nouns and verbs). On the other hand, we detected no significant facilitation effect when the target words had to be named within a homogeneous gender list (all masculine nouns) compared to a heterogeneous gender list (both masculine and feminine nouns). In Experiment 2, using the same blocking paradigm by manipulating the semantic category of the items, we found that naming latencies were significantly slower in the semantic category homogeneous in comparison with the semantic category heterogeneous condition. Thus semantic category homogeneity caused an interference, not a facilitation effect like grammatical category homogeneity. Finally, in Experiment 5, nouns in the heterogeneous category condition had to be named just after a verb (category-switching position) or a noun (same-category position). We found a facilitation effect of category homogeneity but no significant effect of position, which showed that the effect of category homogeneity found in Experiments 1, 3, and 4 was not due to a cost of switching between grammatical categories in the heterogeneous grammatical category list. These findings supported the hypothesis that grammatical category information impacts word retrieval processes in speech production, even when words are to be produced in isolation. They are discussed within the context of extant theories of lexical production. PMID

  8. Accelerating Information Retrieval from Profile Hidden Markov Model Databases.

    PubMed

    Tamimi, Ahmad; Ashhab, Yaqoub; Tamimi, Hashem

    2016-01-01

    Profile Hidden Markov Model (Profile-HMM) is an efficient statistical approach to represent protein families. Currently, several databases maintain valuable protein sequence information as profile-HMMs. There is an increasing interest to improve the efficiency of searching Profile-HMM databases to detect sequence-profile or profile-profile homology. However, most efforts to enhance searching efficiency have been focusing on improving the alignment algorithms. Although the performance of these algorithms is fairly acceptable, the growing size of these databases, as well as the increasing demand for using batch query searching approach, are strong motivations that call for further enhancement of information retrieval from profile-HMM databases. This work presents a heuristic method to accelerate the current profile-HMM homology searching approaches. The method works by cluster-based remodeling of the database to reduce the search space, rather than focusing on the alignment algorithms. Using different clustering techniques, 4284 TIGRFAMs profiles were clustered based on their similarities. A representative for each cluster was assigned. To enhance sensitivity, we proposed an extended step that allows overlapping among clusters. A validation benchmark of 6000 randomly selected protein sequences was used to query the clustered profiles. To evaluate the efficiency of our approach, speed and recall values were measured and compared with the sequential search approach. Using hierarchical, k-means, and connected component clustering techniques followed by the extended overlapping step, we obtained an average reduction in time of 41%, and an average recall of 96%. Our results demonstrate that representation of profile-HMMs using a clustering-based approach can significantly accelerate data retrieval from profile-HMM databases.

  9. Accelerating Information Retrieval from Profile Hidden Markov Model Databases

    PubMed Central

    Ashhab, Yaqoub; Tamimi, Hashem

    2016-01-01

    Profile Hidden Markov Model (Profile-HMM) is an efficient statistical approach to represent protein families. Currently, several databases maintain valuable protein sequence information as profile-HMMs. There is an increasing interest to improve the efficiency of searching Profile-HMM databases to detect sequence-profile or profile-profile homology. However, most efforts to enhance searching efficiency have been focusing on improving the alignment algorithms. Although the performance of these algorithms is fairly acceptable, the growing size of these databases, as well as the increasing demand for using batch query searching approach, are strong motivations that call for further enhancement of information retrieval from profile-HMM databases. This work presents a heuristic method to accelerate the current profile-HMM homology searching approaches. The method works by cluster-based remodeling of the database to reduce the search space, rather than focusing on the alignment algorithms. Using different clustering techniques, 4284 TIGRFAMs profiles were clustered based on their similarities. A representative for each cluster was assigned. To enhance sensitivity, we proposed an extended step that allows overlapping among clusters. A validation benchmark of 6000 randomly selected protein sequences was used to query the clustered profiles. To evaluate the efficiency of our approach, speed and recall values were measured and compared with the sequential search approach. Using hierarchical, k-means, and connected component clustering techniques followed by the extended overlapping step, we obtained an average reduction in time of 41%, and an average recall of 96%. Our results demonstrate that representation of profile-HMMs using a clustering-based approach can significantly accelerate data retrieval from profile-HMM databases. PMID:27875548

  10. Retrieving and routing quantum information in a quantum network

    NASA Astrophysics Data System (ADS)

    Sazim, S.; Chiranjeevi, V.; Chakrabarty, I.; Srinathan, K.

    2015-12-01

    In extant quantum secret sharing protocols, once the secret is shared in a quantum network ( qnet) it cannot be retrieved, even if the dealer wishes that his/her secret no longer be available in the network. For instance, if the dealer is part of the two qnets, say {{Q}}_1 and {{Q}}_2 and he/she subsequently finds that {{Q}}_2 is more reliable than {{Q}}_1, he/she may wish to transfer all her secrets from {{Q}}_1 to {{Q}}_2. Known protocols are inadequate to address such a revocation. In this work we address this problem by designing a protocol that enables the source/dealer to bring back the information shared in the network, if desired. Unlike classical revocation, the no-cloning theorem automatically ensures that the secret is no longer shared in the network. The implications of our results are multi-fold. One interesting implication of our technique is the possibility of routing qubits in asynchronous qnets. By asynchrony we mean that the requisite data/resources are intermittently available (but not necessarily simultaneously) in the qnet. For example, we show that a source S can send quantum information to a destination R even though (a) S and R share no quantum resource, (b) R's identity is unknown to S at the time of sending the message, but is subsequently decided, (c) S herself can be R at a later date and/or in a different location to bequeath her information (`backed-up' in the qnet) and (d) importantly, the path chosen for routing the secret may hit a dead end due to resource constraints, congestion, etc., (therefore the information needs to be back-tracked and sent along an alternate path). Another implication of our technique is the possibility of using insecure resources. For instance, if the quantum memory within an organization is insufficient, it may safely store (using our protocol) its private information with a neighboring organization without (a) revealing critical data to the host and (b) losing control over retrieving the data. Putting the

  11. The Pittsburgh Sleep Diary

    NASA Technical Reports Server (NTRS)

    Monk, T. H.; Reynolds CF, 3. d.; Kupfer, D. J.; Buysse, D. J.; Coble, P. A.; Hayes, A. J.; Machen, M. A.; Petrie, S. R.; Ritenour, A. M.

    1994-01-01

    Increasingly, there is a need in both research and clinical practice to document and quantify sleep and waking behaviors in a comprehensive manner. The Pittsburgh Sleep Diary (PghSD) is an instrument with separate components to be completed at bedtime and waketime. Bedtime components relate to the events of the day preceding the sleep, waketime components to the sleep period just completed. Two-week PghSD data is presented from 234 different subjects, comprising 96 healthy young middle-aged controls, 37 older men, 44 older women, 29 young adult controls and 28 sleep disorders patients in order to demonstrate the usefulness, validity and reliability of various measures from the instrument. Comparisons are made with polysomnographic and actigraphic sleep measures, as well as personality and circadian type questionnaires. The instrument was shown to have sensitivity in detecting differences due to weekends, age, gender, personality and circadian type, and validity in agreeing with actigraphic estimates of sleep timing and quality. Over a 12-31 month delay, PghSD measures of both sleep timing and sleep quality showed correlations between 0.56 and 0.81 (n = 39, P < 0.001).

  12. The Pittsburgh Sleep Diary

    NASA Technical Reports Server (NTRS)

    Monk, T. H.; Reynolds CF, 3. d.; Kupfer, D. J.; Buysse, D. J.; Coble, P. A.; Hayes, A. J.; Machen, M. A.; Petrie, S. R.; Ritenour, A. M.

    1994-01-01

    Increasingly, there is a need in both research and clinical practice to document and quantify sleep and waking behaviors in a comprehensive manner. The Pittsburgh Sleep Diary (PghSD) is an instrument with separate components to be completed at bedtime and waketime. Bedtime components relate to the events of the day preceding the sleep, waketime components to the sleep period just completed. Two-week PghSD data is presented from 234 different subjects, comprising 96 healthy young middle-aged controls, 37 older men, 44 older women, 29 young adult controls and 28 sleep disorders patients in order to demonstrate the usefulness, validity and reliability of various measures from the instrument. Comparisons are made with polysomnographic and actigraphic sleep measures, as well as personality and circadian type questionnaires. The instrument was shown to have sensitivity in detecting differences due to weekends, age, gender, personality and circadian type, and validity in agreeing with actigraphic estimates of sleep timing and quality. Over a 12-31 month delay, PghSD measures of both sleep timing and sleep quality showed correlations between 0.56 and 0.81 (n = 39, P < 0.001).

  13. Experiments with Automatic Indexing and a Relational Thesaurus in a Chinese Informational Retrieval System.

    ERIC Educational Resources Information Center

    Wan, Tian-Long; Evens, Martha; Wan, Yeun-Wen; Pao, Yuen-Yuan

    1997-01-01

    A series of experiments determined whether thesauri enhance the retrieval of Chinese documents and automatic indexing can compete with manual indexing in a Chinese information retrieval system (CIRS). Statistical analysis of recall and precision measures suggest that relational thesauri do improve retrieval and that automatic indexing is…

  14. Query-Time Optimization Techniques for Structured Queries in Information Retrieval

    ERIC Educational Resources Information Center

    Cartright, Marc-Allen

    2013-01-01

    The use of information retrieval (IR) systems is evolving towards larger, more complicated queries. Both the IR industrial and research communities have generated significant evidence indicating that in order to continue improving retrieval effectiveness, increases in retrieval model complexity may be unavoidable. From an operational perspective,…

  15. Organization of the Inverted Files in a Distributed Information Retrieval System Based on Thesauri.

    ERIC Educational Resources Information Center

    Mazur, Zygmunt

    1986-01-01

    Describes how operations on local inverted files are to be modified in order to use them in distributed information retrieval systems based on thesauri. The presented rules may be viewed as the logical approach in implementing a distributed retrieval system consisting of n local retrieval systems. (Author/MBR)

  16. Query-Time Optimization Techniques for Structured Queries in Information Retrieval

    ERIC Educational Resources Information Center

    Cartright, Marc-Allen

    2013-01-01

    The use of information retrieval (IR) systems is evolving towards larger, more complicated queries. Both the IR industrial and research communities have generated significant evidence indicating that in order to continue improving retrieval effectiveness, increases in retrieval model complexity may be unavoidable. From an operational perspective,…

  17. A Fuzzy Genetic Algorithm Approach to an Adaptive Information Retrieval Agent.

    ERIC Educational Resources Information Center

    Martin-Bautista, Maria J.; Vila, Maria-Amparo; Larsen, Henrik Legind

    1999-01-01

    Presents an approach to a Genetic Information Retrieval Agent Filter (GIRAF) that filters and ranks documents retrieved from the Internet according to users' preferences by using a Genetic Algorithm and fuzzy set theory to handle the imprecision of users' preferences and users' evaluation of the retrieved documents. (Author/LRW)

  18. Automatic Content Analysis; Part I of Scientific Report No. ISR-18, Information Storage and Retrieval...

    ERIC Educational Resources Information Center

    Cornell Univ., Ithaca, NY. Dept. of Computer Science.

    Four papers are included in Part One of the eighteenth report on Salton's Magical Automatic Retriever of Texts (SMART) project. The first paper: "Content Analysis in Information Retrieval" by S. F. Weiss presents the results of experiments aimed at determining the conditions under which content analysis improves retrieval results as well…

  19. Historical Studies in Documentation. The Pre-History of the Information Retrieval Thesaurus.

    ERIC Educational Resources Information Center

    Roberts, Norman

    1984-01-01

    The information retrieval thesaurus emerged in operational form following a confused intellectual history as a secondary indexing aid. Prescriptive language ideas of Moore and Luhn were absent in early forms and no one attempted to reduce retrieval language as advocated earlier. DuPont retrieval thesaurus (1959) offered a model for further…

  20. The Development of Online Information Retrieval Services in the People's Republic of China.

    ERIC Educational Resources Information Center

    Xiaocun, Lu

    1986-01-01

    Assesses the promotion and development of online information retrieval in China. Highlights include opening of the first online retrieval center at China Overseas Building Development Company Limited; establishment and activities of a cooperative network; online retrieval seminars; telecommunication lines and terminal installations; and problems…

  1. A Fuzzy Genetic Algorithm Approach to an Adaptive Information Retrieval Agent.

    ERIC Educational Resources Information Center

    Martin-Bautista, Maria J.; Vila, Maria-Amparo; Larsen, Henrik Legind

    1999-01-01

    Presents an approach to a Genetic Information Retrieval Agent Filter (GIRAF) that filters and ranks documents retrieved from the Internet according to users' preferences by using a Genetic Algorithm and fuzzy set theory to handle the imprecision of users' preferences and users' evaluation of the retrieved documents. (Author/LRW)

  2. Entropy of the information retrieved from black holes

    NASA Astrophysics Data System (ADS)

    Mersini-Houghton, Laura

    2016-07-01

    The retrieval of black hole information was recently presented in two interesting proposals in the ‘Hawking Radiation’ conference: a revised version by Hooft of a proposal he initially suggested 20 years ago and, a new proposal by Hawking. Both proposals address the problem of black hole information loss at the classical level and derive an expression for the scattering matrix. The former uses gravitation back reaction of incoming particles that imprints its information on the outgoing modes. The latter uses supertranslation symmetry of horizons to relate a phase delay of the outgoing wave packet compared to their incoming wave partners. The difficulty in both proposals is that the entropy obtained from them appears to be infinite. By including quantum effects into the Hawking and Hooft’s proposals, I show that a subtlety arising from the inescapable measurement process, the quantum Zeno effect, not only tames divergences but it actually recovers the correct 1/4 of the area Bekenstein-Hawking entropy law of black holes.

  3. Next-Generation Search Engines for Information Retrieval

    SciTech Connect

    Devarakonda, Ranjeet; Hook, Leslie A; Palanisamy, Giri; Green, James M

    2011-01-01

    centralized index. The harvested files are indexed against SOLR search API consistently, so that it can render search capabilities such as simple, fielded, spatial and temporal searches across a span of projects ranging from land, atmosphere, and ocean ecology. Mercury also provides data sharing capabilities using Open Archive Initiatives Protocol for Metadata Handling (OAI-PMH). In this paper we will discuss about the best practices for archiving data and metadata, new searching techniques, efficient ways of data retrieval and information display.

  4. Recent Developments in the Theory of Information Retrieval. Stockholm Papers in Library and Information Science.

    ERIC Educational Resources Information Center

    Bookstein, Abraham

    Recently considerable attention has been given in the online information retrieval literature to techniques for producing a weighted output of documents in response to a request. One approach tries to maintain the form of and relationships among requests as they appear in current Boolean logic-based systems, while extending it to permit a weighted…

  5. Recent Developments in the Theory of Information Retrieval. Stockholm Papers in Library and Information Science.

    ERIC Educational Resources Information Center

    Bookstein, Abraham

    Recently considerable attention has been given in the online information retrieval literature to techniques for producing a weighted output of documents in response to a request. One approach tries to maintain the form of and relationships among requests as they appear in current Boolean logic-based systems, while extending it to permit a weighted…

  6. A passage retrieval method based on probabilistic information retrieval model and UMLS concepts in biomedical question answering.

    PubMed

    Sarrouti, Mourad; Ouatik El Alaoui, Said

    2017-04-01

    Passage retrieval, the identification of top-ranked passages that may contain the answer for a given biomedical question, is a crucial component for any biomedical question answering (QA) system. Passage retrieval in open-domain QA is a longstanding challenge widely studied over the last decades. However, it still requires further efforts in biomedical QA. In this paper, we present a new biomedical passage retrieval method based on Stanford CoreNLP sentence/passage length, probabilistic information retrieval (IR) model and UMLS concepts. In the proposed method, we first use our document retrieval system based on PubMed search engine and UMLS similarity to retrieve relevant documents to a given biomedical question. We then take the abstracts from the retrieved documents and use Stanford CoreNLP for sentence splitter to make a set of sentences, i.e., candidate passages. Using stemmed words and UMLS concepts as features for the BM25 model, we finally compute the similarity scores between the biomedical question and each of the candidate passages and keep the N top-ranked ones. Experimental evaluations performed on large standard datasets, provided by the BioASQ challenge, show that the proposed method achieves good performances compared with the current state-of-the-art methods. The proposed method significantly outperforms the current state-of-the-art methods by an average of 6.84% in terms of mean average precision (MAP). We have proposed an efficient passage retrieval method which can be used to retrieve relevant passages in biomedical QA systems with high mean average precision. Copyright © 2017 Elsevier Inc. All rights reserved.

  7. Assimilation of SMOS Retrievals in the Land Information System

    NASA Technical Reports Server (NTRS)

    Blankenship, Clay B.; Case, Jonathan L.; Zavodsky, Bradley T.; Crosson, William L.

    2016-01-01

    The Soil Moisture and Ocean Salinity (SMOS) satellite provides retrievals of soil moisture in the upper 5 cm with a 30-50 km resolution and a mission accuracy requirement of 0.04 cm(sub 3 cm(sub -3). These observations can be used to improve land surface model soil moisture states through data assimilation. In this paper, SMOS soil moisture retrievals are assimilated into the Noah land surface model via an Ensemble Kalman Filter within the NASA Land Information System. Bias correction is implemented using Cumulative Distribution Function (CDF) matching, with points aggregated by either land cover or soil type to reduce sampling error in generating the CDFs. An experiment was run for the warm season of 2011 to test SMOS data assimilation and to compare assimilation methods. Verification of soil moisture analyses in the 0-10 cm upper layer and root zone (0-1 m) was conducted using in situ measurements from several observing networks in the central and southeastern United States. This experiment showed that SMOS data assimilation significantly increased the anomaly correlation of Noah soil moisture with station measurements from 0.45 to 0.57 in the 0-10 cm layer. Time series at specific stations demonstrate the ability of SMOS DA to increase the dynamic range of soil moisture in a manner consistent with station measurements. Among the bias correction methods, the correction based on soil type performed best at bias reduction but also reduced correlations. The vegetation-based correction did not produce any significant differences compared to using a simple uniform correction curve.

  8. Multilingual Information Retrieval in Thoracic Radiology: Feasibility Study

    PubMed Central

    Castilla, André Coutinho; Furuie, Sérgio Shiguemi; Mendonça, Eneida A.

    2014-01-01

    Most of essential information contained on Electronic Medical Record is stored as text, imposing several difficulties on automated data extraction and retrieval. Natural language processing is an approach that can unlock clinical information from free texts. The proposed methodology uses the specialized natural language processor MEDLEE developed for English language. To use this processor on Portuguese medical texts, chest x-ray reports were Machine Translated into English. The result of serial coupling of MT an NLP is tagged text which needs further investigation for extracting clinical findings. The objective of this experiment was to investigate normal reports and reports with device description on a set of 165 chest x-ray reports. We obtained sensitivity and specificity of 1 and 0.71 for the first condition and 0.97 and 0.97 for the second respectively. The reference was formed by the opinion of two radiologists. The results of this experiment indicate the viability of extracting clinical findings from chest x-ray reports through coupling MT and NLP. PMID:17911745

  9. 45 CFR 205.35 - Mechanized claims processing and information retrieval systems; definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... claims processing and information retrieval systems; definitions. Section 205.35 through 205.38 contain State plan requirements for an automated statewide management information system, conditions for FFP and...: (a) A mechanized claims processing and information retrieval system, hereafter referred to as...

  10. 45 CFR 205.35 - Mechanized claims processing and information retrieval systems; definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... claims processing and information retrieval systems; definitions. Section 205.35 through 205.38 contain State plan requirements for an automated statewide management information system, conditions for FFP and...: (a) A mechanized claims processing and information retrieval system, hereafter referred to as an...

  11. 45 CFR 205.35 - Mechanized claims processing and information retrieval systems; definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... claims processing and information retrieval systems; definitions. Section 205.35 through 205.38 contain State plan requirements for an automated statewide management information system, conditions for FFP and...: (a) A mechanized claims processing and information retrieval system, hereafter referred to as an...

  12. 45 CFR 205.35 - Mechanized claims processing and information retrieval systems; definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... claims processing and information retrieval systems; definitions. Section 205.35 through 205.38 contain State plan requirements for an automated statewide management information system, conditions for FFP and...: (a) A mechanized claims processing and information retrieval system, hereafter referred to as an...

  13. 45 CFR 205.35 - Mechanized claims processing and information retrieval systems; definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... claims processing and information retrieval systems; definitions. Section 205.35 through 205.38 contain State plan requirements for an automated statewide management information system, conditions for FFP and...: (a) A mechanized claims processing and information retrieval system, hereafter referred to as an...

  14. Disposal of Information Seeking and Retrieval Research: Replacement with a Radical Proposition

    ERIC Educational Resources Information Center

    Budd, John M.; Anstaett, Ashley

    2013-01-01

    Introduction: Research and theory on the topics of information seeking and retrieval have been plagued by some fundamental problems for several decades. Many of the difficulties spring from mechanistic and instrumental thinking and modelling. Method: Existing models of information retrieval and information seeking are examined for efficacy in a…

  15. 7 CFR 277.18 - Establishment of an Automated Data Processing (ADP) and Information Retrieval System.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...) and Information Retrieval System. 277.18 Section 277.18 Agriculture Regulations of the Department of... Data Processing (ADP) and Information Retrieval System. (a) Scope and application. This section.... System specifications means information about the new ADP systems, such as: Workload descriptions, input...

  16. Adult Age Differences in Accessing and Retrieving Information from Long-Term Memory.

    ERIC Educational Resources Information Center

    Petros, Thomas V.; And Others

    1983-01-01

    Investigated adult age differences in accessing and retrieving information from long-term memory. Results showed that older adults (N=26) were slower than younger adults (N=35) at feature extraction, lexical access, and accessing category information. The age deficit was proportionally greater when retrieval of category information was required.…

  17. Adult Age Differences in Accessing and Retrieving Information from Long-Term Memory.

    ERIC Educational Resources Information Center

    Petros, Thomas V.; And Others

    1983-01-01

    Investigated adult age differences in accessing and retrieving information from long-term memory. Results showed that older adults (N=26) were slower than younger adults (N=35) at feature extraction, lexical access, and accessing category information. The age deficit was proportionally greater when retrieval of category information was required.…

  18. INFORMATION RETRIEVAL: A LOOK AT THE LOGICAL FRAMEWORK AND SOME NEW CONCEPTS,

    DTIC Science & Technology

    Information retrieval is discussed and related to fields of study which have important implications for an understanding and ultimate unmasking of...the problem of automatic information retrieval . These related studies are called the Information Sciences and include those sciences and techniques

  19. Comparing the quality of accessing medical literature using content-based visual and textual information retrieval

    NASA Astrophysics Data System (ADS)

    Müller, Henning; Kalpathy-Cramer, Jayashree; Kahn, Charles E., Jr.; Hersh, William

    2009-02-01

    Content-based visual information (or image) retrieval (CBIR) has been an extremely active research domain within medical imaging over the past ten years, with the goal of improving the management of visual medical information. Many technical solutions have been proposed, and application scenarios for image retrieval as well as image classification have been set up. However, in contrast to medical information retrieval using textual methods, visual retrieval has only rarely been applied in clinical practice. This is despite the large amount and variety of visual information produced in hospitals every day. This information overload imposes a significant burden upon clinicians, and CBIR technologies have the potential to help the situation. However, in order for CBIR to become an accepted clinical tool, it must demonstrate a higher level of technical maturity than it has to date. Since 2004, the ImageCLEF benchmark has included a task for the comparison of visual information retrieval algorithms for medical applications. In 2005, a task for medical image classification was introduced and both tasks have been run successfully for the past four years. These benchmarks allow an annual comparison of visual retrieval techniques based on the same data sets and the same query tasks, enabling the meaningful comparison of various retrieval techniques. The datasets used from 2004-2007 contained images and annotations from medical teaching files. In 2008, however, the dataset used was made up of 67,000 images (along with their associated figure captions and the full text of their corresponding articles) from two Radiological Society of North America (RSNA) scientific journals. This article describes the results of the medical image retrieval task of the ImageCLEF 2008 evaluation campaign. We compare the retrieval results of both visual and textual information retrieval systems from 15 research groups on the aforementioned data set. The results show clearly that, currently

  20. A Problem in Information Retrieval with Fuzzy Sets.

    ERIC Educational Resources Information Center

    Buell, Duncan A.

    1985-01-01

    Discussion of problems with fuzzy subsets in document retrieval highlights attempts to invent a system of weighted fuzzy queries in which weights correspond to relative importance of each term in query as whole, and use of Kantor's Logic for Retrieval as an alternative to Boolean queries. Six references are cited. (EJS)

  1. A Problem in Information Retrieval with Fuzzy Sets.

    ERIC Educational Resources Information Center

    Buell, Duncan A.

    1985-01-01

    Discussion of problems with fuzzy subsets in document retrieval highlights attempts to invent a system of weighted fuzzy queries in which weights correspond to relative importance of each term in query as whole, and use of Kantor's Logic for Retrieval as an alternative to Boolean queries. Six references are cited. (EJS)

  2. Contextual Information Drives the Reconsolidation-Dependent Updating of Retrieved Fear Memories

    PubMed Central

    Jarome, Timothy J; Ferrara, Nicole C; Kwapis, Janine L; Helmstetter, Fred J

    2015-01-01

    Stored memories enter a temporary state of vulnerability following retrieval known as ‘reconsolidation', a process that can allow memories to be modified to incorporate new information. Although reconsolidation has become an attractive target for treatment of memories related to traumatic past experiences, we still do not know what new information triggers the updating of retrieved memories. Here, we used biochemical markers of synaptic plasticity in combination with a novel behavioral procedure to determine what was learned during memory reconsolidation under normal retrieval conditions. We eliminated new information during retrieval by manipulating animals' training experience and measured changes in proteasome activity and GluR2 expression in the amygdala, two established markers of fear memory lability and reconsolidation. We found that eliminating new contextual information during the retrieval of memories for predictable and unpredictable fear associations prevented changes in proteasome activity and glutamate receptor expression in the amygdala, indicating that this new information drives the reconsolidation of both predictable and unpredictable fear associations on retrieval. Consistent with this, eliminating new contextual information prior to retrieval prevented the memory-impairing effects of protein synthesis inhibitors following retrieval. These results indicate that under normal conditions, reconsolidation updates memories by incorporating new contextual information into the memory trace. Collectively, these results suggest that controlling contextual information present during retrieval may be a useful strategy for improving reconsolidation-based treatments of traumatic memories associated with anxiety disorders such as post-traumatic stress disorder. PMID:26062788

  3. Common Problems of Documentary Information Transfer, Storage and Retrieval in Industrial Organizations.

    ERIC Educational Resources Information Center

    Vickers, P. H.

    1983-01-01

    Examination of management information systems of three manufacturing firms highlights principal characteristics, document types and functions, main information flows, storage and retrieval systems, and common problems (corporate memory failure, records management, management information systems, general management). A literature review and…

  4. Common Problems of Documentary Information Transfer, Storage and Retrieval in Industrial Organizations.

    ERIC Educational Resources Information Center

    Vickers, P. H.

    1983-01-01

    Examination of management information systems of three manufacturing firms highlights principal characteristics, document types and functions, main information flows, storage and retrieval systems, and common problems (corporate memory failure, records management, management information systems, general management). A literature review and…

  5. Exploiting semantic linkages among multiple sources for semantic information retrieval

    NASA Astrophysics Data System (ADS)

    Li, JianQiang; Yang, Ji-Jiang; Liu, Chunchen; Zhao, Yu; Liu, Bo; Shi, Yuliang

    2014-07-01

    The vision of the Semantic Web is to build a global Web of machine-readable data to be consumed by intelligent applications. As the first step to make this vision come true, the initiative of linked open data has fostered many novel applications aimed at improving data accessibility in the public Web. Comparably, the enterprise environment is so different from the public Web that most potentially usable business information originates in an unstructured form (typically in free text), which poses a challenge for the adoption of semantic technologies in the enterprise environment. Considering that the business information in a company is highly specific and centred around a set of commonly used concepts, this paper describes a pilot study to migrate the concept of linked data into the development of a domain-specific application, i.e. the vehicle repair support system. The set of commonly used concepts, including the part name of a car and the phenomenon term on the car repairing, are employed to build the linkage between data and documents distributed among different sources, leading to the fusion of documents and data across source boundaries. Then, we describe the approaches of semantic information retrieval to consume these linkages for value creation for companies. The experiments on two real-world data sets show that the proposed approaches outperform the best baseline 6.3-10.8% and 6.4-11.1% in terms of top five and top 10 precisions, respectively. We believe that our pilot study can serve as an important reference for the development of similar semantic applications in an enterprise environment.

  6. WebMIRS: web-based medical information retrieval system

    NASA Astrophysics Data System (ADS)

    Long, L. Rodney; Pillemer, Stanley R.; Lawrence, Reva C.; Goh, Gin-Hua; Neve, Leif; Thoma, George R.

    1997-12-01

    At the Lister Hill National Center for Biomedical Communications, a research and development division of the National Library of Medicine (NLM), we are developing a prototype multimedia database system to provide World Wide Web access to biomedical databases. WebMIRS (Web-based Medical Information Retrieval System) will allow access to databases containing text and images and will allow database query by standard SQL, by image content, or by a combination of the two. The system is being developed in the form of Java applets, which will communicate with the Informix DBMS on an NLM Sun workstation running the Solaris operating system. The system architecture will allow access from any hardware platform, which supports a Java-enabled Web browser, such as Netscape or Internet Explorer. Initial databases will include data from two national health surveys conducted by the National Center for Health Statistics (NCHS), and will include x-ray images from those surveys. In addition to describing in- house research in database access systems, this paper describes ongoing work toward querying by image content. Image content search capability will include capability to search for x-ray images similar to an input image with respect to vertebral morphometry used to characterize features such as fractures and disc space narrowing.

  7. How to retrieve additional information from the multiplicity distributions

    NASA Astrophysics Data System (ADS)

    Wilk, Grzegorz; Włodarczyk, Zbigniew

    2017-01-01

    Multiplicity distributions (MDs) P(N) measured in multiparticle production processes are most frequently described by the negative binomial distribution (NBD). However, with increasing collision energy some systematic discrepancies have become more and more apparent. They are usually attributed to the possible multi-source structure of the production process and described using a multi-NBD form of the MD. We investigate the possibility of keeping a single NBD but with its parameters depending on the multiplicity N. This is done by modifying the widely known clan model of particle production leading to the NBD form of P(N). This is then confronted with the approach based on the so-called cascade-stochastic formalism which is based on different types of recurrence relations defining P(N). We demonstrate that a combination of both approaches allows the retrieval of additional valuable information from the MDs, namely the oscillatory behavior of the counting statistics apparently visible in the high energy data.

  8. Construction of Chinese-English Semantic Hierarchy for Information Retrieval

    DTIC Science & Technology

    2000-06-01

    4.1 Related Work: Translation in Cross- Language Information Retrieval �³¹ Í ÙáÙ Í ½ SÊ ÇǺ Í Ê7¹-ØÑ Í Ñ-º{ʽ¶Ó Í º-Ùá»&½Ò�· Í ¹CÁÙ1¸/½ Ñ)¶ Ê...m»&¶ Í Ó�Ñ-¸/½ Ǻ-¸CÓ�¸/º-º)¸ · Í Ä+¸[ºÂ· Í ¹?ÁÙá¸/½ ÑiÑ-º?ʽ¶)ÈÌÊÑ-» Í ½$� SÊ È&Ñ-Ø Í ÁÒ7Ø · Í ¹CÁ Ô Ù1¸/½ ÑiÑ)º{ʽ¶-ÈHÊÑ)» Í ½ Í Ó�Ñ-¸/½ÝÇ

  9. Adaptive information retrieval: machine learning in associate networks

    SciTech Connect

    Belew, R.K.

    1986-01-01

    One interesting issue in artificial intelligence (Al) currently is the relative merits of, and relationship between, the symbolic and connectionist approaches to intelligent systems building. The performance of more-traditional symbolic systems has been striking, but getting these systems to learn truly new symbols has proven difficult. Recently, some researchers have begun to explore a distinctly different type of representation, similar in some respects to the nerve nets of several decades past. In these massively parallel, connectionist models, symbols arise implicitly, through the interactions of many simple and subsymbolic elements. The work described here was done in two phases. The first phase concentrated on mapping the information retrieval (IR) task into a connectionist network; it is shown that IR is very amendable to this representation. The second, more central phase of the research has shown that this network can also adapt. AIR translates the browsing behaviors of its users into a feedback signal used by a Hebbian-like local learning rule to change the weights on some links. Experience with a series of alternative learning rules are reported, and the results of experiments using human subjects to evaluate the results of AIR's learning are presented.

  10. Information retrieval pathways for health information exchange in multiple care settings.

    PubMed

    Kierkegaard, Patrick; Kaushal, Rainu; Vest, Joshua R

    2014-11-01

    To determine which health information exchange (HIE) technologies and information retrieval pathways healthcare professionals relied on to meet their information needs in the context of laboratory test results, radiological images and reports, and medication histories. Primary data was collected over a 2-month period across 3 emergency departments, 7 primary care practices, and 2 public health clinics in New York state. Qualitative research methods were used to collect and analyze data from semi-structured interviews and participant observation. The study reveals that healthcare professionals used a complex combination of information retrieval pathways for HIE to obtain clinical information from external organizations. The choice for each approach was setting- and information-specific, but was also highly dynamic across users and their information needs. Our findings about the complex nature of information sharing in healthcare provide insights for informatics professionals about the usage of information; indicate the need for managerial support within each organization; and suggest approaches to improve systems for organizations and agencies working to expand HIE adoption.

  11. Generic Information Can Retrieve Known Biological Associations: Implications for Biomedical Knowledge Discovery

    PubMed Central

    van Haagen, Herman H. H. B. M.; 't Hoen, Peter A. C.; Mons, Barend; Schultes, Erik A.

    2013-01-01

    Motivation Weighted semantic networks built from text-mined literature can be used to retrieve known protein-protein or gene-disease associations, and have been shown to anticipate associations years before they are explicitly stated in the literature. Our text-mining system recognizes over 640,000 biomedical concepts: some are specific (i.e., names of genes or proteins) others generic (e.g., ‘Homo sapiens’). Generic concepts may play important roles in automated information retrieval, extraction, and inference but may also result in concept overload and confound retrieval and reasoning with low-relevance or even spurious links. Here, we attempted to optimize the retrieval performance for protein-protein interactions (PPI) by filtering generic concepts (node filtering) or links to generic concepts (edge filtering) from a weighted semantic network. First, we defined metrics based on network properties that quantify the specificity of concepts. Then using these metrics, we systematically filtered generic information from the network while monitoring retrieval performance of known protein-protein interactions. We also systematically filtered specific information from the network (inverse filtering), and assessed the retrieval performance of networks composed of generic information alone. Results Filtering generic or specific information induced a two-phase response in retrieval performance: initially the effects of filtering were minimal but beyond a critical threshold network performance suddenly drops. Contrary to expectations, networks composed exclusively of generic information demonstrated retrieval performance comparable to unfiltered networks that also contain specific concepts. Furthermore, an analysis using individual generic concepts demonstrated that they can effectively support the retrieval of known protein-protein interactions. For instance the concept “binding” is indicative for PPI retrieval and the concept “mutation abnormality” is

  12. Information storage medium and method of recording and retrieving information thereon

    DOEpatents

    Marchant, D. D.; Begej, Stefan

    1986-01-01

    Information storage medium comprising a semiconductor doped with first and second impurities or dopants. Preferably, one of the impurities is introduced by ion implantation. Conductive electrodes are photolithographically formed on the surface of the medium. Information is recorded on the medium by selectively applying a focused laser beam to discrete regions of the medium surface so as to anneal discrete regions of the medium containing lattice defects introduced by the ion-implanted impurity. Information is retrieved from the storage medium by applying a focused laser beam to annealed and non-annealed regions so as to produce a photovoltaic signal at each region.

  13. Transition to On-Line Information and Reference Retrieval. Experimental Retrieval Systems Studies, Report Number 4.

    ERIC Educational Resources Information Center

    Smith, William A., Jr.; And Others

    An existing experimental document and reference retrieval system operating in batch processing, tape oriented mode was converted to an on-line mode with user interaction. Objectives were faster response time, integration of functions, and system accessibility at user location. Effects on file organization, addressing techniques, file maintenance,…

  14. Latent morpho-semantic analysis : multilingual information retrieval with character n-grams and mutual information.

    SciTech Connect

    Bader, Brett William; Chew, Peter A.; Abdelali, Ahmed

    2008-08-01

    We describe an entirely statistics-based, unsupervised, and language-independent approach to multilingual information retrieval, which we call Latent Morpho-Semantic Analysis (LMSA). LMSA overcomes some of the shortcomings of related previous approaches such as Latent Semantic Analysis (LSA). LMSA has an important theoretical advantage over LSA: it combines well-known techniques in a novel way to break the terms of LSA down into units which correspond more closely to morphemes. Thus, it has a particular appeal for use with morphologically complex languages such as Arabic. We show through empirical results that the theoretical advantages of LMSA can translate into significant gains in precision in multilingual information retrieval tests. These gains are not matched either when a standard stemmer is used with LSA, or when terms are indiscriminately broken down into n-grams.

  15. Functions of a Man-Machine Interactive Information Retrieval System

    DTIC Science & Technology

    An effective man-machine interactive retrieval system is not achieved by simply placing a terminal on each end of an existing machine retrieval...many of these needs was developed and tested. The objective of the development of this system, BROWSER, was to investigate the effectiveness of a free...form query with a combinatorial search algorithm and the effectiveness of various techniques and components to facilitate online browsing.

  16. Efficient Methods to Assimilate Satellite Retrievals Based on Information Content. Part 2; Suboptimal Retrieval Assimilation

    NASA Technical Reports Server (NTRS)

    Joiner, J.; Dee, D. P.

    1998-01-01

    One of the outstanding problems in data assimilation has been and continues to be how best to utilize satellite data while balancing the tradeoff between accuracy and computational cost. A number of weather prediction centers have recently achieved remarkable success in improving their forecast skill by changing the method by which satellite data are assimilated into the forecast model from the traditional approach of assimilating retrievals to the direct assimilation of radiances in a variational framework. The operational implementation of such a substantial change in methodology involves a great number of technical details, e.g., pertaining to quality control procedures, systematic error correction techniques, and tuning of the statistical parameters in the analysis algorithm. Although there are clear theoretical advantages to the direct radiance assimilation approach, it is not obvious at all to what extent the improvements that have been obtained so far can be attributed to the change in methodology, or to various technical aspects of the implementation. The issue is of interest because retrieval assimilation retains many practical and logistical advantages which may become even more significant in the near future when increasingly high-volume data sources become available. The central question we address here is: how much improvement can we expect from assimilating radiances rather than retrievals, all other things being equal? We compare the two approaches in a simplified one-dimensional theoretical framework, in which problems related to quality control and systematic error correction are conveniently absent. By assuming a perfect radiative transfer model and perfect knowledge of radiance and background error covariances, we are able to formulate a nonlinear local error analysis for each assimilation method. Direct radiance assimilation is optimal in this idealized context, while the traditional method of assimilating retrievals is suboptimal because it

  17. Personalizing Information Retrieval Using Interaction Behaviors in Search Sessions in Different Types of Tasks

    ERIC Educational Resources Information Center

    Liu, Chang

    2012-01-01

    When using information retrieval (IR) systems, users often pose short and ambiguous query terms. It is critical for IR systems to obtain more accurate representation of users' information need, their document preferences, and the context they are working in, and then incorporate them into the design of the systems to tailor retrieval to…

  18. On a Model of Distributed Information Retrieval Systems Based on Thesauri.

    ERIC Educational Resources Information Center

    Mazur, Zygmunt

    1984-01-01

    Investigates the properties of a global model consisting of "n" local information retrieval systems based on thesaurus. Definitions of a distributed information retrieval system (thesaurus, documents set, set of queries) and proofs of theorems denoting further properties of the systems are highlighted. Five references are included. (EJS)

  19. PAT-Tree-Based Adaptive Keyphrase Extraction for Intelligent Chinese Information Retrieval.

    ERIC Educational Resources Information Center

    Chien, Lee-Feng

    1999-01-01

    Considers the need for keyphrase-extraction techniques in intelligent Chinese information retrieval and presents a PAT-tree-based adaptive approach, developed from the PATRICIA Algorithm (Practical Algorithm to Retrieve Information Coded in Alphanumeric). Discusses Internet utilization, automatic term suggestion, domain-specific lexicon…

  20. Experiments in Discourse Analysis Impact on Information Classification and Retrieval Algorithms.

    ERIC Educational Resources Information Center

    Morato, Jorge; Llorens, J.; Genova, G.; Moreiro, J. A.

    2003-01-01

    Discusses the inclusion of contextual information in indexing and retrieval systems to improve results and the ability to carry out text analysis by means of linguistic knowledge. Presents research that investigated whether discourse variables have an impact on information and retrieval and classification algorithms. (Author/LRW)

  1. A Parallel Relational Database Management System Approach to Relevance Feedback in Information Retrieval.

    ERIC Educational Resources Information Center

    Lundquist, Carol; Frieder, Ophir; Holmes, David O.; Grossman, David

    1999-01-01

    Describes a scalable, parallel, relational database-drive information retrieval engine. To support portability across a wide range of execution environments, all algorithms adhere to the SQL-92 standard. By incorporating relevance feedback algorithms, accuracy is enhanced over prior database-driven information retrieval efforts. Presents…

  2. Using Cause-Effect Relations in Text To Improve Information Retrieval Precision.

    ERIC Educational Resources Information Center

    Khoo, Christopher S. G.; Myaeng, Sung Hyon; Oddy, Robert N.

    2001-01-01

    This study used semantic relations expressed in text, particularly cause-effect relations, to improve information retrieval effectiveness. Investigated whether information obtained by matching cause-effect relations expressed in documents with the cause-effect relations expressed in users' queries can be used to improve retrieval results, in…

  3. Personalizing Information Retrieval Using Interaction Behaviors in Search Sessions in Different Types of Tasks

    ERIC Educational Resources Information Center

    Liu, Chang

    2012-01-01

    When using information retrieval (IR) systems, users often pose short and ambiguous query terms. It is critical for IR systems to obtain more accurate representation of users' information need, their document preferences, and the context they are working in, and then incorporate them into the design of the systems to tailor retrieval to…

  4. Experiments in Discourse Analysis Impact on Information Classification and Retrieval Algorithms.

    ERIC Educational Resources Information Center

    Morato, Jorge; Llorens, J.; Genova, G.; Moreiro, J. A.

    2003-01-01

    Discusses the inclusion of contextual information in indexing and retrieval systems to improve results and the ability to carry out text analysis by means of linguistic knowledge. Presents research that investigated whether discourse variables have an impact on information and retrieval and classification algorithms. (Author/LRW)

  5. Strong Similarity Measures for Ordered Sets of Documents in Information Retrieval.

    ERIC Educational Resources Information Center

    Egghe, L.; Michel, Christine

    2002-01-01

    Presents a general method to construct ordered similarity measures in information retrieval based on classical similarity measures for ordinary sets. Describes a test of some of these measures in an information retrieval system that extracted ranked document sets and discuses the practical usability of the ordered similarity measures. (Author/LRW)

  6. Factors Influencing Successful Use of Information Retrieval Systems by Nurse Practitioner Students

    PubMed Central

    Rose, Linda; Crabtree, Katherine; Hersh, William

    1998-01-01

    This study examined whether a relationship exists between selected Nurse Practitioner students' attributes and successful information retrieval as demonstrated by correctly answering clinical questions using an information retrieval system (Medline). One predictor variable, attitude toward current computer technology, was significantly correlated (r =0.43, p ≤ .05) with successful literature searching.

  7. Dissociable parietal regions facilitate successful retrieval of recently learned and personally familiar information.

    PubMed

    Elman, Jeremy A; Cohn-Sheehy, Brendan I; Shimamura, Arthur P

    2013-03-01

    In fMRI analyses, the posterior parietal cortex (PPC) is particularly active during the successful retrieval of episodic memory. To delineate the neural correlates of episodic retrieval more succinctly, we compared retrieval of recently learned spatial locations (photographs of buildings) with retrieval of previously familiar locations (photographs of familiar campus buildings). Episodic retrieval of recently learned locations activated a circumscribed region within the ventral PPC (anterior angular gyrus and adjacent regions in the supramarginal gyrus) as well as medial PPC regions (posterior cingulated gyrus and posterior precuneus). Retrieval of familiar locations activated more posterior regions in the ventral PPC (posterior angular gyrus, LOC) and more anterior regions in the medial PPC (anterior precuneus and retrosplenial cortex). These dissociable effects define more precisely PPC regions involved in the retrieval of recent, contextually bound information as opposed to regions involved in other processes, such as visual imagery, scene reconstruction, and self-referential processing.

  8. Information Extraction: New Developments in Astronomical Information Retrieval for Electronic Publications

    NASA Astrophysics Data System (ADS)

    Lesteven, Soizick; Bonnarel, F.; Dubois, P.; Egret, D.; Fernique, P.; Genova, F.; Murtagh, F.; Ochsenbein, F.; Wenger, M.

    The explosion of on-line services and the rapid evolution in information technology, with the advent of the WWW, gives its full dimension to the electronic publication. Electronic publication has to be conceived with links to external resources (databases, bibliographic services) and with intelligent information retrieval tools. To provide links one needs to recognize the relevant information from a document, and to connect this information to the proper distributed resource. Recognition is the first step; the whole procedure may include the validation for correctness and completeness, and the addition of dynamic links to distributed services. In addition, publication in electronic form permits new methods to access published information. Several activities take place at CDS in this context: * CDS develops and maintains links to and from other distributed services (CDS services with electronic publications and the ADS); * CDS develops and maintains services which give access to published information (the VizieR catalogue browser for published tables or SIMBAD which tracks object citations in papers); * CDS develops information retrieval tools (the bibliographic maps or tools to automatically recognize object names in a text). All these developments require close connections with the distributed services (editors, database managers, service managers, ...). A few examples will be presented.

  9. Expert Search Strategies: The Information Retrieval Practices of Healthcare Information Professionals.

    PubMed

    Russell-Rose, Tony; Chamberlain, Jon

    2017-10-02

    Healthcare information professionals play a key role in closing the knowledge gap between medical research and clinical practice. Their work involves meticulous searching of literature databases using complex search strategies that can consist of hundreds of keywords, operators, and ontology terms. This process is prone to error and can lead to inefficiency and bias if performed incorrectly. The aim of this study was to investigate the search behavior of healthcare information professionals, uncovering their needs, goals, and requirements for information retrieval systems. A survey was distributed to healthcare information professionals via professional association email discussion lists. It investigated the search tasks they undertake, their techniques for search strategy formulation, their approaches to evaluating search results, and their preferred functionality for searching library-style databases. The popular literature search system PubMed was then evaluated to determine the extent to which their needs were met. The 107 respondents indicated that their information retrieval process relied on the use of complex, repeatable, and transparent search strategies. On average it took 60 minutes to formulate a search strategy, with a search task taking 4 hours and consisting of 15 strategy lines. Respondents reviewed a median of 175 results per search task, far more than they would ideally like (100). The most desired features of a search system were merging search queries and combining search results. Healthcare information professionals routinely address some of the most challenging information retrieval problems of any profession. However, their needs are not fully supported by current literature search systems and there is demand for improved functionality, in particular regarding the development and management of search strategies.

  10. Integrating information retrieval with distant supervision for gene ontology annotation.

    PubMed

    Zhu, Dongqing; Li, Dingcheng; Carterette, Ben; Liu, Hongfang

    2014-01-01

    This article describes our participation of the Gene Ontology Curation task (GO task) in BioCreative IV where we participated in both subtasks: A) identification of GO evidence sentences (GOESs) for relevant genes in full-text articles and B) prediction of GO terms for relevant genes in full-text articles. For subtask A, we trained a logistic regression model to detect GOES based on annotations in the training data supplemented with more noisy negatives from an external resource. Then, a greedy approach was applied to associate genes with sentences. For subtask B, we designed two types of systems: (i) search-based systems, which predict GO terms based on existing annotations for GOESs that are of different textual granularities (i.e., full-text articles, abstracts, and sentences) using state-of-the-art information retrieval techniques (i.e., a novel application of the idea of distant supervision) and (ii) a similarity-based system, which assigns GO terms based on the distance between words in sentences and GO terms/synonyms. Our best performing system for subtask A achieves an F1 score of 0.27 based on exact match and 0.387 allowing relaxed overlap match. Our best performing system for subtask B, a search-based system, achieves an F1 score of 0.075 based on exact match and 0.301 considering hierarchical matches. Our search-based systems for subtask B significantly outperformed the similarity-based system. https://github.com/noname2020/Bioc. © The Author(s) 2014. Published by Oxford University Press.

  11. Information retrieval patterns and needs among practicing general surgeons: a statewide experience.

    PubMed

    Shelstad, K R; Clevenger, F W

    1996-10-01

    Information retrieval has progressed from a reliance on traditional print sources to the modern era of computer databases and online networks. Surgeons, many from remote areas not served by professional medical libraries, must develop and maintain skills in information retrieval and management in both electronic and standard formats. One hundred thirty-three New Mexico general surgeons were surveyed to identify their information-seeking patterns in five areas: retrieval purposes, retrieval sources, barriers to access, techniques used, and continuing education needs. Ninety-nine (74.4%) surgeons responded to the survey. Ninety-five percent utilize professional meetings, the medical literature, and physician colleagues as information sources. Only 17% utilize the outreach services of the state's only medical school library. Common retrieval barriers were practice demands (71%), isolation from medical schools (30%), computer illiteracy (28%), and rural environment (25%). Continuing education topics related to information management would be valuable to 61% of the surgeons. Sixty-nine percent believe their current ability to access biomedical information is adequate, despite most frequently accessing their personal libraries for information related to decision-making or patient management. These data suggest that, despite significant information needs, surgeons have not embraced newer forms of information retrieval. It is imperative that surgeons acquire and maintain modern information retrieval skills as a means of remaining up-to-date in their profession. Professional surgical organizations and medical librarians should collaborate on these continuing education ventures.

  12. The Effect of Human Behavior on the Design of an Information Retrieval System Interface.

    ERIC Educational Resources Information Center

    Jin, Zhang; Fine, Sara

    1996-01-01

    Focuses on human behavior in the information-seeking process, and identifies behaviors influencing the design of information retrieval system interfaces. Discusses the principles of saturation, concreteness, least resistance, familiarity, stimulation, certainty, simplicity, and following-form. (PEN)

  13. Subjective Probability and Information Retrieval: A Review of the Psychological Literature.

    ERIC Educational Resources Information Center

    Thompson, Paul

    1988-01-01

    Reviews the subjective probability estimation literature of six schools of human judgement and decision making: decision theory, behavioral decision theory, psychological decision theory, social judgement theory, information integration theory, and attribution theory. Implications for probabilistic information retrieval are discussed, including…

  14. Intrasubtest scatter on the WAIS-III information subtest and psychometrically defined retrieval deficits.

    PubMed

    Ryan, J J; Paul, C A; Arb, J D

    1999-12-01

    Milberg, et al. (1996) postulated that significant intrasubtest scatter on the Wechsler Information subtest reflects impaired retrieval. From a pool of 205 male referrals at a VA medical center with complete WAIS-III and WMS-III protocols, 28 participants with impaired retrieval (Group I) defined by a high Retrieval Composite score were identified. A sample (Group II) without similar evidence of impaired retrieval was matched to Group I on age, education, Full Scale IQ, race, and diagnosis. Intrasubtest scatter on the Information subtest was the same across groups (Group I M = 6.3, SD = 2.7; Group II M = 6.9, SD = 3.4). A second study identified impaired retrieval using the WMS-III Word Lists subtest. 21 participants (Group III) had impaired retrieval indicated by a Recognition scaled score being > or = 4 points higher than the Delayed Recall scaled score. A matched sample (Group IV) of VA patients without similar evidence of impaired retrieval was constituted. Intrasubtest scatter on the Information subtest did not differ across groups (Group III M = 6.6, SD = 2.4; Group IV M = 6.0, SD = 2.5). Evaluations of the retrieval deficit hypothesis should be based on responses of participants whose Information performance is characterized by abnormal amounts of intrasubtest scatter. It is possible that a specific amount of response variability must be present within the subtest before retrieval problems can be detected.

  15. [Design and implementation of medical instrument standard information retrieval system based on APS.NET].

    PubMed

    Yu, Kaijun

    2010-07-01

    This paper Analys the design goals of Medical Instrumentation standard information retrieval system. Based on the B /S structure,we established a medical instrumentation standard retrieval system with ASP.NET C # programming language, IIS f Web server, SQL Server 2000 database, in the. NET environment. The paper also Introduces the system structure, retrieval system modules, system development environment and detailed design of the system.

  16. FORDAT : an information retrieval system for forest economic data

    Treesearch

    Henry M. Spelter

    1981-01-01

    Time series data frequently used in Forest Service studies of wood products consumption have been stored in a data retrieval system on the computer of the University of Wisconsin. The data cover activity in wood processing from forest to end use. Prices and costs at succeeding stages, historical usage, production rates, and other relevant data to wood use analysis were...

  17. A Microfilm Information Retrieval System for Newspaper Libraries

    ERIC Educational Resources Information Center

    Janda, Kenneth; Gordon, David

    1970-01-01

    Paper presented before the newspaper Division at Special Libraries Association Conference (Montreal, June 1969). A pilot program at Medill School of Journalism, Northwestern University, uses Microfilm Retrieval Access Code (Miracode) for rapid automatic searching of newspaper clipping files. (Editor/JS)

  18. An information retrieval system for research file data

    Treesearch

    Joan E. Lengel; John W. Koning

    1978-01-01

    Research file data have been successfully retrieved at the Forest Products Laboratory through a high-speed cross-referencing system involving the computer program FAMULUS as modified by the Madison Academic Computing Center at the University of Wisconsin. The method of data input, transfer to computer storage, system utilization, and effectiveness are discussed....

  19. Information Storage and Retrieval, Scientific Report No. ISR-15.

    ERIC Educational Resources Information Center

    Salton, Gerard

    Several algorithms were investigated which would allow a user to interact with an automatic document retrieval system by requesting relevance judgments on selected sets of documents. Two viewpoints were taken in evaluation. One measured the movement of queries toward the optimum query as defined by Rocchio; the other measured the retrieval…

  20. An Optical Disk-Based Information Retrieval System.

    ERIC Educational Resources Information Center

    Bender, Avi

    1988-01-01

    Discusses a pilot project by the Nuclear Regulatory Commission to apply optical disk technology to the storage and retrieval of documents related to its high level waste management program. Components and features of the microcomputer-based system which provides full-text and image access to documents are described. A sample search is included.…

  1. A Microfilm Information Retrieval System for Newspaper Libraries

    ERIC Educational Resources Information Center

    Janda, Kenneth; Gordon, David

    1970-01-01

    Paper presented before the newspaper Division at Special Libraries Association Conference (Montreal, June 1969). A pilot program at Medill School of Journalism, Northwestern University, uses Microfilm Retrieval Access Code (Miracode) for rapid automatic searching of newspaper clipping files. (Editor/JS)

  2. Data retrieval system provides unlimited hardware design information

    NASA Technical Reports Server (NTRS)

    Rawson, R. D.; Swanson, R. L.

    1967-01-01

    Data is input to magnetic tape on a single format card that specifies the system, location, and component, the test point identification number, the operators initial, the date, a data code, and the data itself. This method is efficient for large volume data storage and retrieval, and permits output variations without continuous program modifications.

  3. Pittsburgh Adapts to Changing Times.

    ERIC Educational Resources Information Center

    States, Deidre

    1985-01-01

    The Samuel F. B. Morse School, built in 1874 and closed in 1980, is a historic landmark in Pittsburgh, Pennsylvania. Now the building serves as low-income housing for 70 elderly tenants and is praised as being an imaginative and creative use of an old school structure. (MLF)

  4. View of the Warrington Avenue Bridge portal, inbound from Pittsburgh ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the Warrington Avenue Bridge portal, inbound from Pittsburgh - Pittsburgh & Castle Shannon Railroad, Warrington Avenue Bridge, Overbrook Trolley Line, Crossing Warrington Avenue, Pittsburgh, Allegheny County, PA

  5. View of the Warrington Avenue Bridge portal, outbound from Pittsburgh ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the Warrington Avenue Bridge portal, outbound from Pittsburgh - Pittsburgh & Castle Shannon Railroad, Warrington Avenue Bridge, Overbrook Trolley Line, Crossing Warrington Avenue, Pittsburgh, Allegheny County, PA

  6. Cross-Language Information Retrieval: Experiments Based on CLEF 2000 Corpora.

    ERIC Educational Resources Information Center

    Savoy, Jacques

    2003-01-01

    Discusses cross-language, multilingual, and bilingual information retrieval on the Web; evaluates retrieval effectiveness of indexing and search strategies based on test collections from CLEF (Cross-Language Evaluation Forum) in English, French, German, and Italian; and suggests and evaluates database merging strategies. Appendices include…

  7. Information Retrieval in an Office Filing Facility and Future Work in Project Minstrel.

    ERIC Educational Resources Information Center

    Smeaton, A. F.; van Rijsbergen, C. J.

    1986-01-01

    Review of office filing facility filing and retrieval mechanisms for unstructured and mixed media information focuses on free text methods. Also discussed are the state of the art in handling voice and image data, problems with searching text surrogates to implement free text content retrieval, and work of Project Minstrel. (Author/MBR)

  8. A Theory for the Storage and Retrieval of Item and Associative Information.

    ERIC Educational Resources Information Center

    Murdock, Bennet B., Jr.

    1982-01-01

    A theory for storage and retrieval of associative information is presented. Items or events are represented as random vectors. Convolution is used as the storage operation, correlation as the retrieval operation. A distributed memory system is assumed. The theory applies to recognition and recall and covers both accuracy and latency. (Author/RD)

  9. Design and Implementation of Automatic Indexing for Information Retrieval with Arabic Documents.

    ERIC Educational Resources Information Center

    Hmeidi, Ismail; Kanaan, Ghassan; Evens, Martha

    1997-01-01

    Describes automatic information retrieval system designed and built to handle Arabic data. Discusses cost-effectiveness of automatic indexing. Compares retrieval results using words as index terms versus stems and roots. Includes 19 tables; 60 queries using full words and relevance judgments are appended. (JAK)

  10. Modeling the Time Course of Feature Perception and Feature Information Retrieval

    ERIC Educational Resources Information Center

    Kent, Christopher; Lamberts, Koen

    2006-01-01

    Three experiments investigated whether retrieval of information about different dimensions of a visual object varies as a function of the perceptual properties of those dimensions. The experiments involved two perception-based matching tasks and two retrieval-based matching tasks. A signal-to-respond methodology was used in all tasks. A stochastic…

  11. Cross-Language Information Retrieval: Experiments Based on CLEF 2000 Corpora.

    ERIC Educational Resources Information Center

    Savoy, Jacques

    2003-01-01

    Discusses cross-language, multilingual, and bilingual information retrieval on the Web; evaluates retrieval effectiveness of indexing and search strategies based on test collections from CLEF (Cross-Language Evaluation Forum) in English, French, German, and Italian; and suggests and evaluates database merging strategies. Appendices include…

  12. A Bibliometric Analysis of Collaboration in the Field of Information Retrieval.

    ERIC Educational Resources Information Center

    Ding, Ying; Foo, Schubert; Chowdhury, Gobinda

    1998-01-01

    Analyzes the collaborative patterns of the information retrieval research field using co-authored articles retrieved from "Social Science Citation Index" for a period of 11 years, from 1987 to 1997. Results reveal an upward trend of collaborative research with interdisciplinary and intra-disciplinary scholarly communication. (Author/LRW)

  13. Proceedings of the Symposium on Information Storage and Retrieval...April 1-2, 1971.

    ERIC Educational Resources Information Center

    Minker, Jack, Ed.; Rosenfeld, Sam, Ed.

    The symposium focused on advances in techniques in the computer oriented technology of information retrieval. Early developments and the status of recent efforts in document retrieval, question answering and data management systems are briefly reviewed. Unless fundamental processing techniques are developed and made available to workers,…

  14. DESIGN PRINCIPLES FOR AN ON-LINE INFORMATION RETRIEVAL SYSTEM. TECHNICAL REPORT.

    ERIC Educational Resources Information Center

    LOWE, THOMAS C.

    AREAS INVESTIGATED INCLUDE SLOW MEMORY DATA STORAGE, THE PROBLEM OF DECODING FROM AN INDEX TO A SLOW MEMORY ADDRESS, THE STRUCTURE OF DATA LISTS AND DATA LIST OPERATORS, COMMUNICATIONS BETWEEN THE HUMAN USER AND THE SYSTEM, PROCESSING OF RETRIEVAL REQUESTS, AND THE USER'S CONTROL OVER THE RETURN OF INFORMATION RETRIEVED. LINEAR, LINKED AND…

  15. A Bayesian Approach to User Stopping Rules for Information Retrieval Systems.

    ERIC Educational Resources Information Center

    Kraft, Donald H.; Waller, W. G.

    1981-01-01

    Presents a dynamic model of user behavior when scanning an information storage and retrieval system output list, compares rules for determining the user's optimum stopping point, presents an algorithm for implementing the Bayesian model, and discusses implications for retrieval system design. Provided are 13 figures and 15 references. (Author/RBF)

  16. A Theory for the Storage and Retrieval of Item and Associative Information.

    ERIC Educational Resources Information Center

    Murdock, Bennet B., Jr.

    1982-01-01

    A theory for storage and retrieval of associative information is presented. Items or events are represented as random vectors. Convolution is used as the storage operation, correlation as the retrieval operation. A distributed memory system is assumed. The theory applies to recognition and recall and covers both accuracy and latency. (Author/RD)

  17. A Study of the Impact of Representations in Information Retrieval Systems. Annual Technical Report.

    ERIC Educational Resources Information Center

    Katzer, Jeffrey; And Others

    This study conducted to determine representation impact on information items retrieval in terms of precision and recall performance and overlap used the INSPEC "Computers and Control Abstracts" loaded on DIATOM, an online retrieval system based on DIALOG, as the database to be searched. Sixty-nine users provided 84 queries which were…

  18. Retrieval practice is an efficient method of enhancing the retention of anatomy and physiology information.

    PubMed

    Dobson, John L

    2013-06-01

    Although a great deal of empirical evidence has indicated that retrieval practice is an effective means of promoting learning and memory, very few studies have investigated the strategy in the context of an actual class. The primary purpose of this study was to determine if a series of very brief retrieval quizzes could significantly improve the retention of previously tested information throughout an anatomy and physiology course. A second purpose was to determine if there were any significant differences between expanding and uniform patterns of retrieval that followed a standardized initial retrieval delay. Anatomy and physiology students were assigned to either a control group or groups that were repeatedly prompted to retrieve a subset of previously tested course information via a series of quizzes that were administered on either an expanding or a uniform schedule. Each retrieval group completed a total of 10 retrieval quizzes, and the series of quizzes required (only) a total of 2 h to complete. Final retention of the exam subset material was assessed during the last week of the semester. There were no significant differences between the expanding and uniform retrieval groups, but both retained an average of 41% more of the subset material than did the control group (ANOVA, F = 129.8, P = 0.00, ηp(2) = 0.36). In conclusion, retrieval practice is a highly efficient and effective strategy for enhancing the retention of anatomy and physiology material.

  19. Intelligent Information Retrieval: Diagnosing Information Need. Part II. Uncertainty Expansion in a Prototype of a Diagnostic IR Tool.

    ERIC Educational Resources Information Center

    Cole, Charles; Cantero, Pablo; Sauve, Diane

    1998-01-01

    Outlines a prototype of an intelligent information-retrieval tool to facilitate information access for an undergraduate seeking information for a term paper. Topics include diagnosing the information need, Kuhlthau's information-search-process model, Shannon's mathematical theory of communication, and principles of uncertainty expansion and…

  20. An overview of selected information storage and retrieval issues in computerized document processing

    NASA Technical Reports Server (NTRS)

    Dominick, Wayne D. (Editor); Ihebuzor, Valentine U.

    1984-01-01

    The rapid development of computerized information storage and retrieval techniques has introduced the possibility of extending the word processing concept to document processing. A major advantage of computerized document processing is the relief of the tedious task of manual editing and composition usually encountered by traditional publishers through the immense speed and storage capacity of computers. Furthermore, computerized document processing provides an author with centralized control, the lack of which is a handicap of the traditional publishing operation. A survey of some computerized document processing techniques is presented with emphasis on related information storage and retrieval issues. String matching algorithms are considered central to document information storage and retrieval and are also discussed.

  1. Retrieval monitoring is influenced by information value: the interplay between importance and confidence on false memory.

    PubMed

    McDonough, Ian M; Bui, Dung C; Friedman, Michael C; Castel, Alan D

    2015-10-01

    The perceived value of information can influence one's motivation to successfully remember that information. This study investigated how information value can affect memory search and evaluation processes (i.e., retrieval monitoring). In Experiment 1, participants studied unrelated words associated with low, medium, or high values. Subsequent memory tests required participants to selectively monitor retrieval for different values. False memory effects were smaller when searching memory for high-value than low-value words, suggesting that people more effectively monitored more important information. In Experiment 2, participants studied semantically-related words, and the need for retrieval monitoring was reduced at test by using inclusion instructions (i.e., endorsement of any word related to the studied words) compared with standard instructions. Inclusion instructions led to increases in false recognition for low-value, but not for high-value words, suggesting that under standard-instruction conditions retrieval monitoring was less likely to occur for important information. Experiment 3 showed that words retrieved with lower confidence were associated with more effective retrieval monitoring, suggesting that the quality of the retrieved memory influenced the degree and effectiveness of monitoring processes. Ironically, unless encouraged to do so, people were less likely to carefully monitor important information, even though people want to remember important memories most accurately.

  2. Pittsburgh-Tuskegee Prostate Training Program

    DTIC Science & Technology

    2015-07-01

    ORGANIZATION: University of Pittsburgh Pittsburgh, PA 15213-2303 REPORT DATE: July 2015 TYPE OF REPORT: Final PREPARED FOR: U.S. Army Medical...ADDRESS(ES) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBER University of Pittsburgh Office of Research 123 University Place Pittsburgh PA...15260 Tuskegee University Office of Sponsored Projects 4th Floor Carnegie Hall Tuskegee AL 36088 9. SPONSORING / MONITORING AGENCY NAME(S) AND

  3. Evaluating the Quality of Query Refinement Suggestions in Information Retrieval

    DTIC Science & Technology

    2006-01-01

    However, evaluating the effec- tiveness of these suggestions has remained quite subjective, with a vast majority of the past work relying on expensive...addressing the polysemy problem while QR suggestions can ef- fectively address both the problems. For example, query expansion may be able to retrieve...However, these evaluation measures can be quite expensive since it involves user interaction. Another work on evaluation that has similar objectives to the

  4. Confabulation in Alzheimer's disease: poor encoding and retrieval of over-learned information.

    PubMed

    Attali, Eve; De Anna, Francesca; Dubois, Bruno; Dalla Barba, Gianfranco

    2009-01-01

    Patients who confabulate retrieve personal habits, repeated events or over-learned information and mistake them for actually experienced, specific unique events. Although some hypotheses favour a disruption of frontal/executive functions operating at retrieval, the respective involvement of encoding and retrieval processes in confabulation is still controversial. The present study sought to investigate experimentally the involvement of encoding and retrieval processes and the interference of over-learned information in the confabulation of Alzheimer's disease patients. Twenty Alzheimer's disease patients and 20 normal controls encoded and retrieved unknown stories, well-known fairy tales (e.g. Snow White) and modified well-known fairy tales (e.g. Little Red Riding Hood is not eaten by the wolf) under three experimental conditions: (i) full attention at encoding and at retrieval; (ii) divided attention at encoding (i.e. performing an attention demanding secondary task) and full attention at retrieval; (iii) full attention at encoding and divided attention at retrieval. We found that confabulations in Alzheimer's disease patients were more frequent for the modified well-known fairy tales and when encoding was weakened by a concurrent secondary task (61%), compared with the other types of stories and experimental conditions. Confabulations in the modified fairy tales always consisted of elements of the original version of the fairy tale (e.g. Little Red Riding Hood is eaten by the wolf). This is the first experimental evidence showing that poor encoding and over-learned information are involved in confabulation in Alzheimer's disease.

  5. Improving biomedical information retrieval by linear combinations of different query expansion techniques.

    PubMed

    Abdulla, Ahmed AbdoAziz Ahmed; Lin, Hongfei; Xu, Bo; Banbhrani, Santosh Kumar

    2016-07-25

    Biomedical literature retrieval is becoming increasingly complex, and there is a fundamental need for advanced information retrieval systems. Information Retrieval (IR) programs scour unstructured materials such as text documents in large reserves of data that are usually stored on computers. IR is related to the representation, storage, and organization of information items, as well as to access. In IR one of the main problems is to determine which documents are relevant and which are not to the user's needs. Under the current regime, users cannot precisely construct queries in an accurate way to retrieve particular pieces of data from large reserves of data. Basic information retrieval systems are producing low-quality search results. In our proposed system for this paper we present a new technique to refine Information Retrieval searches to better represent the user's information need in order to enhance the performance of information retrieval by using different query expansion techniques and apply a linear combinations between them, where the combinations was linearly between two expansion results at one time. Query expansions expand the search query, for example, by finding synonyms and reweighting original terms. They provide significantly more focused, particularized search results than do basic search queries. The retrieval performance is measured by some variants of MAP (Mean Average Precision) and according to our experimental results, the combination of best results of query expansion is enhanced the retrieved documents and outperforms our baseline by 21.06 %, even it outperforms a previous study by 7.12 %. We propose several query expansion techniques and their combinations (linearly) to make user queries more cognizable to search engines and to produce higher-quality search results.

  6. Parallel interactive retrieval of item and associative information from event memory.

    PubMed

    Cox, Gregory E; Criss, Amy H

    2017-09-01

    Memory contains information about individual events (items) and combinations of events (associations). Despite the fundamental importance of this distinction, it remains unclear exactly how these two kinds of information are stored and whether different processes are used to retrieve them. We use both model-independent qualitative properties of response dynamics and quantitative modeling of individuals to address these issues. Item and associative information are not independent and they are retrieved concurrently via interacting processes. During retrieval, matching item and associative information mutually facilitate one another to yield an amplified holistic signal. Modeling of individuals suggests that this kind of facilitation between item and associative retrieval is a ubiquitous feature of human memory. Copyright © 2017 Elsevier Inc. All rights reserved.

  7. Scalability of Findability: Decentralized Search and Retrieval in Large Information Networks

    ERIC Educational Resources Information Center

    Ke, Weimao

    2010-01-01

    Amid the rapid growth of information today is the increasing challenge for people to survive and navigate its magnitude. Dynamics and heterogeneity of large information spaces such as the Web challenge information retrieval in these environments. Collection of information in advance and centralization of IR operations are hardly possible because…

  8. Scalability of Findability: Decentralized Search and Retrieval in Large Information Networks

    ERIC Educational Resources Information Center

    Ke, Weimao

    2010-01-01

    Amid the rapid growth of information today is the increasing challenge for people to survive and navigate its magnitude. Dynamics and heterogeneity of large information spaces such as the Web challenge information retrieval in these environments. Collection of information in advance and centralization of IR operations are hardly possible because…

  9. Pittsburgh Tuskegee Prostate Training Program

    DTIC Science & Technology

    2014-05-01

    education.   15 . SUBJECT TERMS prostate cancer, health disparities, training, education, tumor biology 16. SECURITY CLASSIFICATION OF: 17...Year (2013) December 2012 – March 2013, Tuskegee University sophomore trainees will be selected as “Prostate Cancer Scholars” for summer internship... sophomore trainees will be selected as “Prostate Cancer Scholars” for summer internship at the University of Pittsburgh. This is being reported on

  10. The Online Bioinformatics Resources Collection at the University of Pittsburgh Health Sciences Library System—a one-stop gateway to online bioinformatics databases and software tools

    PubMed Central

    Chen, Yi-Bu; Chattopadhyay, Ansuman; Bergen, Phillip; Gadd, Cynthia; Tannery, Nancy

    2007-01-01

    To bridge the gap between the rising information needs of biological and medical researchers and the rapidly growing number of online bioinformatics resources, we have created the Online Bioinformatics Resources Collection (OBRC) at the Health Sciences Library System (HSLS) at the University of Pittsburgh. The OBRC, containing 1542 major online bioinformatics databases and software tools, was constructed using the HSLS content management system built on the Zope® Web application server. To enhance the output of search results, we further implemented the Vivísimo Clustering Engine®, which automatically organizes the search results into categories created dynamically based on the textual information of the retrieved records. As the largest online collection of its kind and the only one with advanced search results clustering, OBRC is aimed at becoming a one-stop guided information gateway to the major bioinformatics databases and software tools on the Web. OBRC is available at the University of Pittsburgh's HSLS Web site (). PMID:17108360

  11. Visual working memory buffers information retrieved from visual long-term memory.

    PubMed

    Fukuda, Keisuke; Woodman, Geoffrey F

    2017-05-16

    Human memory is thought to consist of long-term storage and short-term storage mechanisms, the latter known as working memory. Although it has long been assumed that information retrieved from long-term memory is represented in working memory, we lack neural evidence for this and need neural measures that allow us to watch this retrieval into working memory unfold with high temporal resolution. Here, we show that human electrophysiology can be used to track information as it is brought back into working memory during retrieval from long-term memory. Specifically, we found that the retrieval of information from long-term memory was limited to just a few simple objects' worth of information at once, and elicited a pattern of neurophysiological activity similar to that observed when people encode new information into working memory. Our findings suggest that working memory is where information is buffered when being retrieved from long-term memory and reconcile current theories of memory retrieval with classic notions about the memory mechanisms involved.

  12. Transfer and distortion of atmospheric information in the satellite temperature retrieval problem

    NASA Technical Reports Server (NTRS)

    Thompson, O. E.

    1981-01-01

    A systematic approach to investigating the transfer of basic ambient temperature information and its distortion by satellite systems and subsequent analysis algorithms is discussed. The retrieval analysis cycle is derived, the variance spectrum of information is examined as it takes different forms in that process, and the quality and quantity of information existing at each stop is compared with the initial ambient temperature information. Temperature retrieval algorithms can smooth, add, or further distort information, depending on how stable the algorithm is, and how heavily influenced by a priori data.

  13. Study of Query Expansion Techniques and Their Application in the Biomedical Information Retrieval

    PubMed Central

    Rivas, A. R.; Iglesias, E. L.; Borrajo, L.

    2014-01-01

    Information Retrieval focuses on finding documents whose content matches with a user query from a large document collection. As formulating well-designed queries is difficult for most users, it is necessary to use query expansion to retrieve relevant information. Query expansion techniques are widely applied for improving the efficiency of the textual information retrieval systems. These techniques help to overcome vocabulary mismatch issues by expanding the original query with additional relevant terms and reweighting the terms in the expanded query. In this paper, different text preprocessing and query expansion approaches are combined to improve the documents initially retrieved by a query in a scientific documental database. A corpus belonging to MEDLINE, called Cystic Fibrosis, is used as a knowledge source. Experimental results show that the proposed combinations of techniques greatly enhance the efficiency obtained by traditional queries. PMID:24723793

  14. Study of query expansion techniques and their application in the biomedical information retrieval.

    PubMed

    Rivas, A R; Iglesias, E L; Borrajo, L

    2014-01-01

    Information Retrieval focuses on finding documents whose content matches with a user query from a large document collection. As formulating well-designed queries is difficult for most users, it is necessary to use query expansion to retrieve relevant information. Query expansion techniques are widely applied for improving the efficiency of the textual information retrieval systems. These techniques help to overcome vocabulary mismatch issues by expanding the original query with additional relevant terms and reweighting the terms in the expanded query. In this paper, different text preprocessing and query expansion approaches are combined to improve the documents initially retrieved by a query in a scientific documental database. A corpus belonging to MEDLINE, called Cystic Fibrosis, is used as a knowledge source. Experimental results show that the proposed combinations of techniques greatly enhance the efficiency obtained by traditional queries.

  15. GOSAT CO2 retrieval results using TANSO-CAI aerosol information over East Asia

    NASA Astrophysics Data System (ADS)

    KIM, M.; Kim, W.; Jung, Y.; Lee, S.; Kim, J.; Lee, H.; Boesch, H.; Goo, T. Y.

    2015-12-01

    In the satellite remote sensing of CO2, incorrect aerosol information could induce large errors as previous studies suggested. Many factors, such as, aerosol type, wavelength dependency of AOD, aerosol polarization effect and etc. have been main error sources. Due to these aerosol effects, large number of data retrieved are screened out in quality control, or retrieval errors tend to increase if not screened out, especially in East Asia where aerosol concentrations are fairly high. To reduce these aerosol induced errors, a CO2 retrieval algorithm using the simultaneous TANSO-CAI aerosol information is developed. This algorithm adopts AOD and aerosol type information as a priori information from the CAI aerosol retrieval algorithm. The CO2 retrieval algorithm based on optimal estimation method and VLIDORT, a vector discrete ordinate radiative transfer model. The CO2 algorithm, developed with various state vectors to find accurate CO2 concentration, shows reasonable results when compared with other dataset. This study concentrates on the validation of retrieved results with the ground-based TCCON measurements in East Asia and the comparison with the previous retrieval from ACOS, NIES, and UoL. Although, the retrieved CO2 concentration is lower than previous results by ppm's, it shows similar trend and high correlation with previous results. Retrieved data and TCCON measurements data are compared at three stations of Tsukuba, Saga, Anmyeondo in East Asia, with the collocation criteria of ±2°in latitude/longitude and ±1 hours of GOSAT passing time. Compared results also show similar trend with good correlation. Based on the TCCON comparison results, bias correction equation is calculated and applied to the East Asia data.

  16. The validation of the Yonsei CArbon Retrieval algorithm with improved aerosol information using GOSAT measurements

    NASA Astrophysics Data System (ADS)

    Jung, Yeonjin; Kim, Jhoon; Kim, Woogyung; Boesch, Hartmut; Goo, Tae-Young; Cho, Chunho

    2017-04-01

    Although several CO2 retrieval algorithms have been developed to improve our understanding about carbon cycle, limitations in spatial coverage and uncertainties due to aerosols and thin cirrus clouds are still remained as a problem for monitoring CO2 concentration globally. Based on an optimal estimation method, the Yonsei CArbon Retrieval (YCAR) algorithm was developed to retrieve the column-averaged dry-air mole fraction of carbon dioxide (XCO2) using the Greenhouse Gases Observing SATellite (GOSAT) measurements with optimized a priori CO2 profiles and aerosol models over East Asia. In previous studies, the aerosol optical properties (AOP) are the most important factors in CO2 retrievals since AOPs are assumed as fixed parameters during retrieval process, resulting in significant XCO2 retrieval error up to 2.5 ppm. In this study, to reduce these errors caused by inaccurate aerosol optical information, the YCAR algorithm improved with taking into account aerosol optical properties as well as aerosol vertical distribution simultaneously. The CO2 retrievals with two difference aerosol approaches have been analyzed using the GOSAT spectra and have been evaluated throughout the comparison with collocated ground-based observations at several Total Carbon Column Observing Network (TCCON) sites. The improved YCAR algorithm has biases of 0.59±0.48 ppm and 2.16±0.87 ppm at Saga and Tsukuba sites, respectively, with smaller biases and higher correlation coefficients compared to the GOSAT operational algorithm. In addition, the XCO2 retrievals will be validated at other TCCON sites and error analysis will be evaluated. These results reveal that considering better aerosol information can improve the accuracy of CO2 retrieval algorithm and provide more useful XCO2 information with reduced uncertainties. This study would be expected to provide useful information in estimating carbon sources and sinks.

  17. Enhanced information retrieval from narrative German-language clinical text documents using automated document classification.

    PubMed

    Spat, Stephan; Cadonna, Bruno; Rakovac, Ivo; Gütl, Christian; Leitner, Hubert; Stark, Günther; Beck, Peter

    2008-01-01

    The amount of narrative clinical text documents stored in Electronic Patient Records (EPR) of Hospital Information Systems is increasing. Physicians spend a lot of time finding relevant patient-related information for medical decision making in these clinical text documents. Thus, efficient and topical retrieval of relevant patient-related information is an important task in an EPR system. This paper describes the prototype of a medical information retrieval system (MIRS) for clinical text documents. The open-source information retrieval framework Apache Lucene has been used to implement the prototype of the MIRS. Additionally, a multi-label classification system based on the open-source data mining framework WEKA generates metadata from the clinical text document set. The metadata is used for influencing the rank order of documents retrieved by physicians. Combining information retrieval and automated document classification offers an enhanced approach to let physicians and in the near future patients define their information needs for information stored in an EPR. The system has been designed as a J2EE Web-application. First findings are based on a sample of 18,000 unstructured, clinical text documents written in German.

  18. On-Line Retrieval System Design; Part V of Scientific Report No. ISR-18, Information Storage and Retrieval...

    ERIC Educational Resources Information Center

    Cornell Univ., Ithaca, NY. Dept. of Computer Science.

    On-line retrieval system design is discussed in the two papers which make up Part Five of this report on Salton's Magical Automatic Retriever of Texts (SMART) project report. The first paper: "A Prototype On-Line Document Retrieval System" by D. Williamson and R. Williamson outlines a design for a SMART on-line document retrieval system…

  19. Space shuttle program information control and retrieval system feasibility study report

    NASA Technical Reports Server (NTRS)

    Lingle, C. P.

    1973-01-01

    The feasibility of having a common information management network for space shuttle data, is studied. Identified are the information types required, sources and users of the information, and existing techniques for acquiring, storing and retrieving the data. The study concluded that a decentralized system is feasible, and described a recommended development plan for it.

  20. Information Retrieval: Presentation and Demonstration of an Interactive Computer-Based Search Program.

    ERIC Educational Resources Information Center

    Spuck, Dennis W.; And Others

    A symposium with four major presentations centering on the topic of computer-based information retrieval. Also highlighted are several features of the Wisconsin Information System for Education (WISE-ONE) and the Educational Resources Information Center (ERIC) system. The first paper in the series discusses the development, current capabilities…

  1. A Computer-Based System Integrating Instruction and Information Retrieval: A Description of Some Methodological Considerations.

    ERIC Educational Resources Information Center

    Selig, Judith A.; And Others

    This report, summarizing the activities of the Vision Information Center (VIC) in the field of computer-assisted instruction from December, 1966 to August, 1967, describes the methodology used to load a large body of information--a programed text on basic opthalmology--onto a computer for subsequent information retrieval and computer-assisted…

  2. Information Retrieval: Presentation and Demonstration of an Interactive Computer-Based Search Program.

    ERIC Educational Resources Information Center

    Spuck, Dennis W.; And Others

    A symposium with four major presentations centering on the topic of computer-based information retrieval. Also highlighted are several features of the Wisconsin Information System for Education (WISE-ONE) and the Educational Resources Information Center (ERIC) system. The first paper in the series discusses the development, current capabilities…

  3. Computer Supported Cooperative Work in Information Search and Retrieval.

    ERIC Educational Resources Information Center

    Twidale, Michael B.; Nichols, David M.

    1998-01-01

    Considers how research in collaborative technologies can inform research and development in library and information science. Topics include computer supported collaborative work; shared drawing; collaborative writing; MUDs; MOOs; workflow; World Wide Web; collaborative learning; computer mediated communication; ethnography; evaluation; remote…

  4. SPIRES (STANFORD PHYSICS INFORMATION RETRIEVAL SYSTEM). ANNUAL REPORT.

    ERIC Educational Resources Information Center

    PARKER, EDWIN B.

    SPIRES WAS PLANNED AS A FIVE-YEAR EFFORT TO DEVELOP AND STUDY AN EXPERIMENTAL SYSTEM FOR PROVIDING FOR THE SCIENTIFIC INFORMATION NEEDS OF PHYSICISTS AT STANFORD. THERE ARE TWO COMPONENTS TO THE SPIRES PROJECT. ONE IS TO STUDY THE INFORMATION NEEDS AND INFORMATION-SEEKING BEHAVIOR OF A USER POPULATION OF ABOUT 100 HIGH- ENERGY PHYSICISTS. DETAILS…

  5. Retrieval of the atmospheric compounds using a spectral optical thickness information

    SciTech Connect

    Ioltukhovski, A.A.

    1995-03-01

    A spectral inversion technique for retrieval of the atmospheric gases and aerosols contents is proposed. This technique based upon the preliminary measurement or retrieval of the spectral optical thickness. The existence of a priori information about the spectral cross sections for some of the atmospheric components allows to retrieve the relative contents of these components in the atmosphere. Method of smooth filtration makes possible to estimate contents of atmospheric aerosols with known cross sections and to filter out other aerosols; this is done independently from their relative contribution to the optical thickness.

  6. Advances in metabolome information retrieval: turning chemistry into biology. Part II: biological information recovery.

    PubMed

    Tebani, Abdellah; Afonso, Carlos; Bekri, Soumeya

    2017-08-25

    This work reports the second part of a review intending to give the state of the art of major metabolic phenotyping strategies. It particularly deals with inherent advantages and limits regarding data analysis issues and biological information retrieval tools along with translational challenges. This Part starts with introducing the main data preprocessing strategies of the different metabolomics data. Then, it describes the main data analysis techniques including univariate and multivariate aspects. It also addresses the challenges related to metabolite annotation and characterization. Finally, functional analysis including pathway and network strategies are discussed. The last section of this review is devoted to practical considerations and current challenges and pathways to bring metabolomics into clinical environments.

  7. Fluency heuristic: a model of how the mind exploits a by-product of information retrieval.

    PubMed

    Hertwig, Ralph; Herzog, Stefan M; Schooler, Lael J; Reimer, Torsten

    2008-09-01

    Boundedly rational heuristics for inference can be surprisingly accurate and frugal for several reasons. They can exploit environmental structures, co-opt complex capacities, and elude effortful search by exploiting information that automatically arrives on the mental stage. The fluency heuristic is a prime example of a heuristic that makes the most of an automatic by-product of retrieval from memory, namely, retrieval fluency. In 4 experiments, the authors show that retrieval fluency can be a proxy for real-world quantities, that people can discriminate between two objects' retrieval fluencies, and that people's inferences are in line with the fluency heuristic (in particular fast inferences) and with experimentally manipulated fluency. The authors conclude that the fluency heuristic may be one tool in the mind's repertoire of strategies that artfully probes memory for encapsulated frequency information that can veridically reflect statistical regularities in the world.

  8. Distinct Regions of Prefrontal Cortex Are Associated with the Controlled Retrieval and Selection of Social Information

    PubMed Central

    Satpute, Ajay B.; Badre, David; Ochsner, Kevin N.

    2014-01-01

    Research in social neuroscience has uncovered a social knowledge network that is particularly attuned to making social judgments. However, the processes that are being performed by both regions within this network and those outside of this network that are nevertheless engaged in the service of making a social judgment remain unclear. To help address this, we drew upon research in semantic memory, which suggests that making a semantic judgment engages 2 distinct control processes: A controlled retrieval process, which aids in bringing goal-relevant information to mind from long-term stores, and a selection process, which aids in selecting the information that is goal-relevant from the information retrieved. In a neuroimaging study, we investigated whether controlled retrieval and selection for social information engage distinct portions of both the social knowledge network and regions outside this network. Controlled retrieval for social information engaged an anterior ventrolateral portion of the prefrontal cortex, whereas selection engaged both the dorsomedial prefrontal cortex and temporoparietal junction within the social knowledge network. These results suggest that the social knowledge network may be more involved with the selection of social information than the controlled retrieval of it and incorporates lateral prefrontal regions in accessing memory for making social judgments. PMID:23300111

  9. User assumptions about information retrieval systems: Ethical concerns

    SciTech Connect

    Froehlich, T.J.

    1994-12-31

    Information professionals, whether designers, intermediaries, database producers or vendors, bear some responsibility for the information that they make available to users of information systems. The users of such systems may tend to make many assumptions about the information that a system provides, such as believing: that the data are comprehensive, current and accurate, that the information resources or databases have same degree of quality and consistency of indexing; that the abstracts, if they exist, correctly and adequate reflect the content of the article; that there is consistency informs of author names or journal titles or indexing within and across databases; that there is standardization in and across databases; that once errors are detected, they are corrected; that appropriate choices of databases or information resources are a relatively easy matter, etc. The truth is that few of these assumptions are valid in commercia or corporate or organizational databases. However, given these beliefs and assumptions by many users, often promoted by information providers, information professionals, impossible, should intervene to warn users about the limitations and constraints of the databases they are using. With the growth of the Internet and end-user products (e.g., CD-ROMs), such interventions have significantly declined. In such cases, information should be provided on start-up or through interface screens, indicating to users, the constraints and orientation of the system they are using. The principle of {open_quotes}caveat emptor{close_quotes} is naive and socially irresponsible: information professionals or systems have an obligation to provide some framework or context for the information that users are accessing.

  10. Retrieving and Integrating Data from Multiple Information Sources

    DTIC Science & Technology

    1993-04-30

    part of the report that provides the most NASA - See Handbook NHB 2200.2. meaningful and complete Information. When a NTIS - Leave blank. report is...axioms, but after the axioms.are built _ the domain model is no longer used or needed. In contrast, the domain model in SIMS is an integral part of the...intelligent information systems where, like SIMS, an explicit knowledge model is an integral part of an intelligent information agent. Some additional

  11. Information retrieval from holographic interferograms: Fundamentals and problems

    NASA Technical Reports Server (NTRS)

    Vest, Charles M.

    1987-01-01

    Holographic interferograms can contain large amounts of information about flow and temperature fields. Their information content can be very high because they can be viewed from many different directions. This multidirectionality, and fringe localization add to the information contained in the fringe pattern if diffuse illumination is used. Additional information, and increased accuracy can be obtained through the use of dual reference wave holography to add reference fringes or to effect discrete phase shift or hetrodyne interferometry. Automated analysis of fringes is possible if interferograms are of simple structure and good quality. However, in practice a large number of practical problems can arise, so that a difficult image processing task results.

  12. Retrieving Online Information on Drugs: An Analysis of Four Databases.

    ERIC Educational Resources Information Center

    Lavengood, Kathryn A.

    This study examines the indexing of drugs in the literature and compares actual drug indexing to stated indexing policies in selected databases. The goal is to aid health science information specialists, end-users, and/or non-subject experts to improve recall and comprehensiveness when searching for drug information by identifying the most useful…

  13. Retrieving Online Information on Drugs: An Analysis of Four Databases.

    ERIC Educational Resources Information Center

    Lavengood, Kathryn A.

    This study examines the indexing of drugs in the literature and compares actual drug indexing to stated indexing policies in selected databases. The goal is to aid health science information specialists, end-users, and/or non-subject experts to improve recall and comprehensiveness when searching for drug information by identifying the most useful…

  14. SPIRAL (Sandia's Program for Information Retrieval and Listing)

    ERIC Educational Resources Information Center

    West, Leslie E.

    The general scope of SPIRAL is storage of free-flowing text information into a machine-readable library and recall of any portions of this stored information that are relevant to an inquiry. The major objectives in the design of the system were (1) to make it easy to use by persons unfamiliar with computer systems; and (2) to make it efficient, in…

  15. A Compositional Relevance Model for Adaptive Information Retrieval

    NASA Technical Reports Server (NTRS)

    Mathe, Nathalie; Chen, James; Lu, Henry, Jr. (Technical Monitor)

    1994-01-01

    There is a growing need for rapid and effective access to information in large electronic documentation systems. Access can be facilitated if information relevant in the current problem solving context can be automatically supplied to the user. This includes information relevant to particular user profiles, tasks being performed, and problems being solved. However most of this knowledge on contextual relevance is not found within the contents of documents, and current hypermedia tools do not provide any easy mechanism to let users add this knowledge to their documents. We propose a compositional relevance network to automatically acquire the context in which previous information was found relevant. The model records information on the relevance of references based on user feedback for specific queries and contexts. It also generalizes such information to derive relevant references for similar queries and contexts. This model lets users filter information by context of relevance, build personalized views of documents over time, and share their views with other users. It also applies to any type of multimedia information. Compared to other approaches, it is less costly and doesn't require any a priori statistical computation, nor an extended training period. It is currently being implemented into the Computer Integrated Documentation system which enables integration of various technical documents in a hypertext framework.

  16. A Compositional Relevance Model for Adaptive Information Retrieval

    NASA Technical Reports Server (NTRS)

    Mathe, Nathalie; Chen, James; Lu, Henry, Jr. (Technical Monitor)

    1994-01-01

    There is a growing need for rapid and effective access to information in large electronic documentation systems. Access can be facilitated if information relevant in the current problem solving context can be automatically supplied to the user. This includes information relevant to particular user profiles, tasks being performed, and problems being solved. However most of this knowledge on contextual relevance is not found within the contents of documents, and current hypermedia tools do not provide any easy mechanism to let users add this knowledge to their documents. We propose a compositional relevance network to automatically acquire the context in which previous information was found relevant. The model records information on the relevance of references based on user feedback for specific queries and contexts. It also generalizes such information to derive relevant references for similar queries and contexts. This model lets users filter information by context of relevance, build personalized views of documents over time, and share their views with other users. It also applies to any type of multimedia information. Compared to other approaches, it is less costly and doesn't require any a priori statistical computation, nor an extended training period. It is currently being implemented into the Computer Integrated Documentation system which enables integration of various technical documents in a hypertext framework.

  17. A Query Analysis of Consumer Health Information Retrieval

    PubMed Central

    Hong, Yi; de la Cruz, Norberto; Barnas, Gary; Early, Eileen; Gillis, Rick

    2002-01-01

    The log files of MCW HealthLink web site were analyzed to study users' needs for consumer health information and get a better understanding of the health topics users are searching for, the paths users usually take to find consumer health information and the way to improve search effectiveness.

  18. NASA Access Mechanism - Graphical user interface information retrieval system

    NASA Technical Reports Server (NTRS)

    Hunter, Judy F.; Generous, Curtis; Duncan, Denise

    1993-01-01

    Access to online information sources of aerospace, scientific, and engineering data, a mission focus for NASA's Scientific and Technical Information Program, has always been limited by factors such as telecommunications, query language syntax, lack of standardization in the information, and the lack of adequate tools to assist in searching. Today, the NASA STI Program's NASA Access Mechanism (NAM) prototype offers a solution to these problems by providing the user with a set of tools that provide a graphical interface to remote, heterogeneous, and distributed information in a manner adaptable to both casual and expert users. Additionally, the NAM provides access to many Internet-based services such as Electronic Mail, the Wide Area Information Servers system, Peer Locating tools, and electronic bulletin boards.

  19. NASA access mechanism: Graphical user interface information retrieval system

    NASA Technical Reports Server (NTRS)

    Hunter, Judy; Generous, Curtis; Duncan, Denise

    1993-01-01

    Access to online information sources of aerospace, scientific, and engineering data, a mission focus for NASA's Scientific and Technical Information Program, has always been limited to factors such as telecommunications, query language syntax, lack of standardization in the information, and the lack of adequate tools to assist in searching. Today, the NASA STI Program's NASA Access Mechanism (NAM) prototype offers a solution to these problems by providing the user with a set of tools that provide a graphical interface to remote, heterogeneous, and distributed information in a manner adaptable to both casual and expert users. Additionally, the NAM provides access to many Internet-based services such as Electronic Mail, the Wide Area Information Servers system, Peer Locating tools, and electronic bulletin boards.

  20. NASA Access Mechanism - Graphical user interface information retrieval system

    NASA Technical Reports Server (NTRS)

    Hunter, Judy F.; Generous, Curtis; Duncan, Denise

    1993-01-01

    Access to online information sources of aerospace, scientific, and engineering data, a mission focus for NASA's Scientific and Technical Information Program, has always been limited by factors such as telecommunications, query language syntax, lack of standardization in the information, and the lack of adequate tools to assist in searching. Today, the NASA STI Program's NASA Access Mechanism (NAM) prototype offers a solution to these problems by providing the user with a set of tools that provide a graphical interface to remote, heterogeneous, and distributed information in a manner adaptable to both casual and expert users. Additionally, the NAM provides access to many Internet-based services such as Electronic Mail, the Wide Area Information Servers system, Peer Locating tools, and electronic bulletin boards.

  1. Semantic analysis based forms information retrieval and classification

    NASA Astrophysics Data System (ADS)

    Saba, Tanzila; Alqahtani, Fatimah Ayidh

    2013-09-01

    Data entry forms are employed in all types of enterprises to collect hundreds of customer's information on daily basis. The information is filled manually by the customers. Hence, it is laborious and time consuming to use human operator to transfer these customers information into computers manually. Additionally, it is expensive and human errors might cause serious flaws. The automatic interpretation of scanned forms has facilitated many real applications from speed and accuracy point of view such as keywords spotting, sorting of postal addresses, script matching and writer identification. This research deals with different strategies to extract customer's information from these scanned forms, interpretation and classification. Accordingly, extracted information is segmented into characters for their classification and finally stored in the forms of records in databases for their further processing. This paper presents a detailed discussion of these semantic based analysis strategies for forms processing. Finally, new directions are also recommended for future research. [Figure not available: see fulltext.

  2. Preparing for Local Adaptation: Understanding Flood Risk Perceptions in Pittsburgh

    NASA Astrophysics Data System (ADS)

    Klima, K.; Wong-Parodi, G.

    2015-12-01

    The City of Pittsburgh experiences numerous floods every year. Aging and insufficient infrastructure contribute to flash floods and to over 20 billion gallons of combined sewer overflows annually, contaminating Pittsburgh's streets, basements, and waterways. Climate change is expected to further exacerbate this problem by causing more intense and more frequent extreme precipitation events in Western Pennsylvania. For a stormwater adaptation plan to be implemented effectively, the City will need informed public support. One way to achieve public understanding and support is through effective communication of the risks, benefits, and uncertainties of local flooding hazards and adaptation methods. In order to develop these communications effectively, the city and its partners will need to know what knowledge and attitudes the residents of Pittsburgh already hold about flood risks. Here we seek to (1) identify Pittsburgh residents' knowledge level, risk perception and attitudes towards flooding and storm water management, and (2) pre-test communications meant to inform and empower Pittsburghers about flood risks and adaptation strategies. We conduct a city-wide survey of 10,000 Pittsburgh renters and homeowners from four life situations: high risk, above poverty; high-risk, below poverty; low risk, above poverty; and low-risk, below poverty. Mixed media recruitment strategies (online and paper-based solicitations guided/organized by community organizations) assist in reaching all subpopulations. Preliminary results suggest participants know what stormwater runoff is, but have a weak understanding of how stormwater interacts with natural and built systems. Furthermore, although participants have a good understanding of the difference between green and gray infrastructure, this does not translate into a change in their willingness to pay for green infrastructure adaptation. This suggests additional communications about flood risks and adaptation strategies.

  3. Coordinating Council. Tenth Meeting: Information retrieval: The role of controlled vocabularies

    NASA Technical Reports Server (NTRS)

    1993-01-01

    The theme of this NASA Scientific and Technical Information Program Coordinating Council meeting was the role of controlled vocabularies (thesauri) in information retrieval. Included are summaries of the presentations and the accompanying visuals. Dr. Raya Fidel addressed 'Retrieval: Free Text, Full Text, and Controlled Vocabularies.' Dr. Bella Hass Weinberg spoke on 'Controlled Vocabularies and Thesaurus Standards.' The presentations were followed by a panel discussion with participation from NASA, the National Library of Medicine, the Defense Technical Information Center, and the Department of Energy; this discussion, however, is not summarized in any detail in this document.

  4. Natural Language Query System Design for Interactive Information Storage and Retrieval Systems. M.S. Thesis

    NASA Technical Reports Server (NTRS)

    Dominick, Wayne D. (Editor); Liu, I-Hsiung

    1985-01-01

    The currently developed multi-level language interfaces of information systems are generally designed for experienced users. These interfaces commonly ignore the nature and needs of the largest user group, i.e., casual users. This research identifies the importance of natural language query system research within information storage and retrieval system development; addresses the topics of developing such a query system; and finally, proposes a framework for the development of natural language query systems in order to facilitate the communication between casual users and information storage and retrieval systems.

  5. User centered and ontology based information retrieval system for life sciences.

    PubMed

    Sy, Mohameth-François; Ranwez, Sylvie; Montmain, Jacky; Regnault, Armelle; Crampes, Michel; Ranwez, Vincent

    2012-01-25

    Because of the increasing number of electronic resources, designing efficient tools to retrieve and exploit them is a major challenge. Some improvements have been offered by semantic Web technologies and applications based on domain ontologies. In life science, for instance, the Gene Ontology is widely exploited in genomic applications and the Medical Subject Headings is the basis of biomedical publications indexation and information retrieval process proposed by PubMed. However current search engines suffer from two main drawbacks: there is limited user interaction with the list of retrieved resources and no explanation for their adequacy to the query is provided. Users may thus be confused by the selection and have no idea on how to adapt their queries so that the results match their expectations. This paper describes an information retrieval system that relies on domain ontology to widen the set of relevant documents that is retrieved and that uses a graphical rendering of query results to favor user interactions. Semantic proximities between ontology concepts and aggregating models are used to assess documents adequacy with respect to a query. The selection of documents is displayed in a semantic map to provide graphical indications that make explicit to what extent they match the user's query; this man/machine interface favors a more interactive and iterative exploration of data corpus, by facilitating query concepts weighting and visual explanation. We illustrate the benefit of using this information retrieval system on two case studies one of which aiming at collecting human genes related to transcription factors involved in hemopoiesis pathway. The ontology based information retrieval system described in this paper (OBIRS) is freely available at: http://www.ontotoolkit.mines-ales.fr/ObirsClient/. This environment is a first step towards a user centred application in which the system enlightens relevant information to provide decision help.

  6. Education, Training and Marketing for Online Information Retrieval Systems.

    ERIC Educational Resources Information Center

    Tedd, Lucy A.

    1979-01-01

    Discusses general aspects of education, training, and marketing techniques for on-line searching, and describes methods adopted by 12 organizations in Norway, the Netherlands, France, Switzerland, Italy, Belgium, and Britain that use computers for their bibliographic information requirements. (CWM)

  7. A Study of Organizational Information Search, Acquisition, Storage and Retrieval

    DTIC Science & Technology

    1986-08-01

    literatures associated with the perspectives are described. The perspectives themselves are first contrasted and then, using a communicatins framework... corporation division. This 19 31 (selective distribution greatly reduces the information processing load of the many potential receiving units having...of Management, 11: 75-86. Shields, M.D. 1983. Effects of Information Supply and Demand on Judgment Accuracy: Evidence from Corporate Managers. The

  8. Archival Administration in the Electronic Information Age: An Advanced Institute for Government Archivists (2nd, Pittsburgh, Pennsylvania, June 3-14, 1991).

    ERIC Educational Resources Information Center

    Pittsburgh Univ., PA. Graduate School of Library and Information Sciences.

    This report describes the first phase of an institute that was designed to provide technical information to the chief administrative officials of state archival agencies about new trends in information technology and to introduce them to management tools needed for operating in this environment. Background information on the first institute…

  9. A Discussion of the Pittsburgh Reading Conference Papers.

    ERIC Educational Resources Information Center

    Samuels, S. J.

    Reviews and evaluative comments concerning the 11 papers read during the April 1976 portion of the Pittsburgh conference on the theory and practice of beginning reading are included in this document. Before the papers are reviewed, information is presented on some questions posed at the conference within the context of two issues that were raised…

  10. Information Retrieval Strategies of Millennial Undergraduate Students in Web and Library Database Searches

    ERIC Educational Resources Information Center

    Porter, Brandi

    2009-01-01

    Millennial students make up a large portion of undergraduate students attending colleges and universities, and they have a variety of online resources available to them to complete academically related information searches, primarily Web based and library-based online information retrieval systems. The content, ease of use, and required search…

  11. AEROMETRIC INFORMATION RETRIEVAL SYSTEM (AIRS) -GEOGRAPHIC, COMMON, AND MAINTENANCE SUBSYSTEM (GCS)

    EPA Science Inventory

    Aerometric Information Retrieval System (AIRS) is a computer-based repository of information about airborne pollution in the United States and various World Health Organization (WHO) member countries. AIRS is administered by the U.S. Environmental Protection Agency, and runs on t...

  12. 15 CFR 950.9 - Computerized Environmental Data and Information Retrieval Service.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... GENERAL REGULATIONS OF THE ENVIRONMENTAL DATA SERVICE ENVIRONMENTAL DATA AND INFORMATION § 950.9 Computerized Environmental Data and Information Retrieval Service. The Environmental Data Index (ENDEX... 15 Commerce and Foreign Trade 3 2010-01-01 2010-01-01 false Computerized Environmental Data and...

  13. Study of School Use of Networks and Information Retrieval Systems. Final Report.

    ERIC Educational Resources Information Center

    Johnson, Bruce; Sharp, Colin

    This two-phase study of the use of networks and information retrieval systems by schools in Australia was designed to inquire as to the extent that schools are using all available networks; how appropriate and effective these sources of information are for schools; how costly such services might be; and what developments can be reasonably expected…

  14. Automatic Identification and Back-Transliteration of Foreign Words for Information Retrieval.

    ERIC Educational Resources Information Center

    Jeong, Kil Soon; Myaeng, Sung Hyon; Lee, Jae Sung; Choi, Key-Sun

    1999-01-01

    Discusses problems that occur in information retrieval when foreign words appear in Korean texts. Describes an algorithm that identifies a phrase containing a foreign word and then extracts that word based on statistical information, and explains a method for back-transliteration of a foreign word to its English origin. (Author/LRW)

  15. A Retrospective and Prospective View of Information Retrieval and Artificial Intelligence in the 21st Century.

    ERIC Educational Resources Information Center

    Garfield, Eugene

    2001-01-01

    Traces the development of information retrieval/services and suggests that the creation of large digital libraries seems inevitable. Examines possibilities for increasing electronic access and the role of artificial intelligence. Highlights include: searching full text; sending full texts; selective dissemination of information (SDI) profiling and…

  16. The Impact of Computers on the Retrieval and Utilization of Chemical Information.

    ERIC Educational Resources Information Center

    Lawrence, Barbara

    The use of computers in retrieving bibliographic chemical information is traced through the SDI, batch, and online modes, and related changes are noted in such areas as data base availability, cost, software, and amount of user control. The impact of these changes on both the quality and quantity of chemical information use is discussed, as well…

  17. The Impact of Computers on the Retrieval and Utilization of Chemical Information.

    ERIC Educational Resources Information Center

    Lawrence, Barbara

    The use of computers in retrieving bibliographic chemical information is traced through the SDI, batch, and online modes, and related changes are noted in such areas as data base availability, cost, software, and amount of user control. The impact of these changes on both the quality and quantity of chemical information use is discussed, as well…

  18. The Public Documents Department Microfiche Information Retrieval System: A Four Year Progress Report.

    ERIC Educational Resources Information Center

    Reynolds, Catharine J.

    1978-01-01

    Discusses the developments that have made the Public Documents Department Microfiche Information Retrieval System, commonly known as the Publications Reference File (PRF), an essential tool for purchase and bibliographic information on government documents. The PRF is produced only on microfiche and updated frequently. (Author/CMV)

  19. Using Metadata To Improve Organization and Information Retrieval on the WWW.

    ERIC Educational Resources Information Center

    Doan, Bich-Lien; Beigbeder, Michel; Girardot, Jean-Jacques; Jaillon, Philippe

    The growing volume of heterogeneous and distributed information on the World Wide Web has made it increasingly difficult for existing tools to retrieve relevant information. To improve the performance of these tools, this paper suggests how to handle two aspects of the problem. The first aspect concerns a better representation and description of…

  20. Information Visualization and Proposing New Interface for Movie Retrieval System (IMDB)

    ERIC Educational Resources Information Center

    Etemadpour, Ronak; Masood, Mona; Belaton, Bahari

    2010-01-01

    This research studies the development of a new prototype of visualization in support of movie retrieval. The goal of information visualization is unveiling of large amounts of data or abstract data set using visual presentation. With this knowledge the main goal is to develop a 2D presentation of information on movies from the IMDB (Internet Movie…

  1. Networked Information Retrieval Tools in the Academic Environment: Towards a Cybernetic Library.

    ERIC Educational Resources Information Center

    Brett, George H., II

    1993-01-01

    Reviews the literature of networked information retrieval tools to explore the concept of an interactive text-based virtual reality environment that would encompass resources currently available on the Internet. Highlights include academic libraries, electronic mail, hypertext navigation systems, wide area information servers, knowbots and…

  2. Information Retrieval Strategies of Millennial Undergraduate Students in Web and Library Database Searches

    ERIC Educational Resources Information Center

    Porter, Brandi

    2009-01-01

    Millennial students make up a large portion of undergraduate students attending colleges and universities, and they have a variety of online resources available to them to complete academically related information searches, primarily Web based and library-based online information retrieval systems. The content, ease of use, and required search…

  3. A Retrospective and Prospective View of Information Retrieval and Artificial Intelligence in the 21st Century.

    ERIC Educational Resources Information Center

    Garfield, Eugene

    2001-01-01

    Traces the development of information retrieval/services and suggests that the creation of large digital libraries seems inevitable. Examines possibilities for increasing electronic access and the role of artificial intelligence. Highlights include: searching full text; sending full texts; selective dissemination of information (SDI) profiling and…

  4. Not on the Same Page: Undergraduates' Information Retrieval in Electronic and Print Books

    ERIC Educational Resources Information Center

    Berg, Selinda Adelle; Hoffmann, Kristin; Dawson, Diane

    2010-01-01

    Academic libraries are increasingly collecting e-books, but little research has investigated how students use e-books compared to print texts. This study used a prompted think-aloud method to gain an understanding of the information retrieval behavior of students in both formats. Qualitative analysis identified themes that will inform instruction…

  5. Networked Information Retrieval Tools in the Academic Environment: Towards a Cybernetic Library.

    ERIC Educational Resources Information Center

    Brett, George H., II

    1993-01-01

    Reviews the literature of networked information retrieval tools to explore the concept of an interactive text-based virtual reality environment that would encompass resources currently available on the Internet. Highlights include academic libraries, electronic mail, hypertext navigation systems, wide area information servers, knowbots and…

  6. Not on the Same Page: Undergraduates' Information Retrieval in Electronic and Print Books

    ERIC Educational Resources Information Center

    Berg, Selinda Adelle; Hoffmann, Kristin; Dawson, Diane

    2010-01-01

    Academic libraries are increasingly collecting e-books, but little research has investigated how students use e-books compared to print texts. This study used a prompted think-aloud method to gain an understanding of the information retrieval behavior of students in both formats. Qualitative analysis identified themes that will inform instruction…

  7. An Information Storage and Retrieval System for Biological and Geological Data. Final Report.

    ERIC Educational Resources Information Center

    Smithsonian Institution, Washington, DC.

    This report describes the Smithsonian Institution Information Retrieval (SIIR) System, a computerized information management system for natural history museums, as well as computer developments subsequent to SIIR, and the SELGEM system which evolved from SIIR and discusses their application to data processing and collection management in museums.…

  8. Determinants to trigger memory reconsolidation: The role of retrieval and updating information.

    PubMed

    Rodriguez-Ortiz, Carlos J; Bermúdez-Rattoni, Federico

    2016-12-21

    Long-term memories can undergo destabilization/restabilization processes, collectively called reconsolidation. However, the parameters that trigger memory reconsolidation are poorly understood and are a matter of intense investigation. Particularly, memory retrieval is widely held as requisite to initiate reconsolidation. This assumption makes sense since only relevant cues will induce reconsolidation of a specific memory. However, recent studies show that pharmacological inhibition of retrieval does not avoid memory from undergoing reconsolidation, indicating that memory reconsolidation occurs through a process that can be dissociated from retrieval. We propose that retrieval is not a unitary process but has two dissociable components; one leading to the expression of memory and the other to reconsolidation, referred herein as executer and integrator respectively. The executer would lead to the behavioral expression of the memory. This component would be the one disrupted on the studies that show reconsolidation independence from retrieval. The integrator would deal with reconsolidation. This component of retrieval would lead to long-term memory destabilization when specific conditions are met. We think that an important number of reports are consistent with the hypothesis that reconsolidation is only initiated when updating information is acquired. We suggest that the integrator would initiate reconsolidation to integrate updating information into long-term memory.

  9. Optically secured information retrieval using two authenticated phase-only masks

    PubMed Central

    Wang, Xiaogang; Chen, Wen; Mei, Shengtao; Chen, Xudong

    2015-01-01

    We propose an algorithm for jointly designing two phase-only masks (POMs) that allow for the encryption and noise-free retrieval of triple images. The images required for optical retrieval are first stored in quick-response (QR) codes for noise-free retrieval and flexible readout. Two sparse POMs are respectively calculated from two different images used as references for authentication based on modified Gerchberg-Saxton algorithm (GSA) and pixel extraction, and are then used as support constraints in a modified double-phase retrieval algorithm (MPRA), together with the above-mentioned QR codes. No visible information about the target images or the reference images can be obtained from each of these authenticated POMs. This approach allows users to authenticate the two POMs used for image reconstruction without visual observation of the reference images. It also allows user to friendly access and readout with mobile devices. PMID:26494213

  10. Optically secured information retrieval using two authenticated phase-only masks

    NASA Astrophysics Data System (ADS)

    Wang, Xiaogang; Chen, Wen; Mei, Shengtao; Chen, Xudong

    2015-10-01

    We propose an algorithm for jointly designing two phase-only masks (POMs) that allow for the encryption and noise-free retrieval of triple images. The images required for optical retrieval are first stored in quick-response (QR) codes for noise-free retrieval and flexible readout. Two sparse POMs are respectively calculated from two different images used as references for authentication based on modified Gerchberg-Saxton algorithm (GSA) and pixel extraction, and are then used as support constraints in a modified double-phase retrieval algorithm (MPRA), together with the above-mentioned QR codes. No visible information about the target images or the reference images can be obtained from each of these authenticated POMs. This approach allows users to authenticate the two POMs used for image reconstruction without visual observation of the reference images. It also allows user to friendly access and readout with mobile devices.

  11. Optically secured information retrieval using two authenticated phase-only masks.

    PubMed

    Wang, Xiaogang; Chen, Wen; Mei, Shengtao; Chen, Xudong

    2015-10-23

    We propose an algorithm for jointly designing two phase-only masks (POMs) that allow for the encryption and noise-free retrieval of triple images. The images required for optical retrieval are first stored in quick-response (QR) codes for noise-free retrieval and flexible readout. Two sparse POMs are respectively calculated from two different images used as references for authentication based on modified Gerchberg-Saxton algorithm (GSA) and pixel extraction, and are then used as support constraints in a modified double-phase retrieval algorithm (MPRA), together with the above-mentioned QR codes. No visible information about the target images or the reference images can be obtained from each of these authenticated POMs. This approach allows users to authenticate the two POMs used for image reconstruction without visual observation of the reference images. It also allows user to friendly access and readout with mobile devices.

  12. 'Meatball searching' - The adversarial approach to online information retrieval

    NASA Technical Reports Server (NTRS)

    Jack, R. F.

    1985-01-01

    It is proposed that the different styles of online searching can be described as either formal (highly precise) or informal with the needs of the client dictating which is most applicable at a particular moment. The background and personality of the searcher also come into play. Particular attention is focused on meatball searching which is a form of online searching characterized by deliberate vagueness. It requires generally comprehensive searches, often on unusual topics and with tight deadlines. It is most likely to occur in search centers serving many different disciplines and levels of client information sophistication. Various information needs are outlined as well as the laws of meatball searching and the adversarial approach. Traits and characteristics important to sucessful searching include: (1) concept analysis, (2) flexibility of thinking, (3) ability to think in synonyms and (4) anticipation of variant word forms and spellings.

  13. 'Meatball searching' - The adversarial approach to online information retrieval

    NASA Technical Reports Server (NTRS)

    Jack, R. F.

    1985-01-01

    It is proposed that the different styles of online searching can be described as either formal (highly precise) or informal with the needs of the client dictating which is most applicable at a particular moment. The background and personality of the searcher also come into play. Particular attention is focused on meatball searching which is a form of online searching characterized by deliberate vagueness. It requires generally comprehensive searches, often on unusual topics and with tight deadlines. It is most likely to occur in search centers serving many different disciplines and levels of client information sophistication. Various information needs are outlined as well as the laws of meatball searching and the adversarial approach. Traits and characteristics important to sucessful searching include: (1) concept analysis, (2) flexibility of thinking, (3) ability to think in synonyms and (4) anticipation of variant word forms and spellings.

  14. JOIS-III JICST'S new online information retrieval system (3)

    NASA Astrophysics Data System (ADS)

    Hamanaka, Hisashi; Takano, Katsuhiro; Motoyama, Noriyuki

    We give an outline of JOIS (JICST On-line Information System)-III, Which has been developed as a succession to JOIS-II now being on service by The Japan Information Center of Science and Technology to start service in January 1990. In this report we show input format from new and function-expanded commands substituting to those of JOIS-II and examples of using. (for 1st part, see vol.32, No. 3 ; 2nd part vol. 32, No.4)

  15. [Information retrieval and reading routines of young doctors].

    PubMed

    Renko, Marjo; Soini, Hannu; Halila, Hannu; Rantala, Heikki; Tapiainen, Terhi; Pokka, Tytti; Uhari, Matti

    2013-01-01

    We performed a survey on information management and reading routines in a random sample of Finnish doctors graduated during the last 2-10 years. The mean time spent on reading medical data sources and literature was three hours per week. The most appreciated sources of information were Current Care and other guidelines written in Finnish, especially among female doctors. The most important problem the doctors encountered was lack of time. Even though a physician who works as an expert needs continuous following of scientific literature the present medical education does not give sufficient expertise to use electronic data sources and international medical literature to solve problems faced with the patients.

  16. Utilization of ontology look-up services in information retrieval for biomedical literature.

    PubMed

    Vishnyakova, Dina; Pasche, Emilie; Lovis, Christian; Ruch, Patrick

    2013-01-01

    With the vast amount of biomedical data we face the necessity to improve information retrieval processes in biomedical domain. The use of biomedical ontologies facilitated the combination of various data sources (e.g. scientific literature, clinical data repository) by increasing the quality of information retrieval and reducing the maintenance efforts. In this context, we developed Ontology Look-up services (OLS), based on NEWT and MeSH vocabularies. Our services were involved in some information retrieval tasks such as gene/disease normalization. The implementation of OLS services significantly accelerated the extraction of particular biomedical facts by structuring and enriching the data context. The results of precision in normalization tasks were boosted on about 20%.

  17. Toward Studying Music Cognition with Information Retrieval Techniques: Lessons Learned from the OpenMIIR Initiative.

    PubMed

    Stober, Sebastian

    2017-01-01

    As an emerging sub-field of music information retrieval (MIR), music imagery information retrieval (MIIR) aims to retrieve information from brain activity recorded during music cognition-such as listening to or imagining music pieces. This is a highly inter-disciplinary endeavor that requires expertise in MIR as well as cognitive neuroscience and psychology. The OpenMIIR initiative strives to foster collaborations between these fields to advance the state of the art in MIIR. As a first step, electroencephalography (EEG) recordings of music perception and imagination have been made publicly available, enabling MIR researchers to easily test and adapt their existing approaches for music analysis like fingerprinting, beat tracking or tempo estimation on this new kind of data. This paper reports on first results of MIIR experiments using these OpenMIIR datasets and points out how these findings could drive new research in cognitive neuroscience.

  18. Toward Studying Music Cognition with Information Retrieval Techniques: Lessons Learned from the OpenMIIR Initiative

    PubMed Central

    Stober, Sebastian

    2017-01-01

    As an emerging sub-field of music information retrieval (MIR), music imagery information retrieval (MIIR) aims to retrieve information from brain activity recorded during music cognition–such as listening to or imagining music pieces. This is a highly inter-disciplinary endeavor that requires expertise in MIR as well as cognitive neuroscience and psychology. The OpenMIIR initiative strives to foster collaborations between these fields to advance the state of the art in MIIR. As a first step, electroencephalography (EEG) recordings of music perception and imagination have been made publicly available, enabling MIR researchers to easily test and adapt their existing approaches for music analysis like fingerprinting, beat tracking or tempo estimation on this new kind of data. This paper reports on first results of MIIR experiments using these OpenMIIR datasets and points out how these findings could drive new research in cognitive neuroscience. PMID:28824478

  19. Electronic retrieval of health information by healthcare providers to improve practice and patient care

    PubMed Central

    McGowan, Jessie; Grad, Roland; Pluye, Pierre; Hannes, Karin; Deane, Katherine; Labrecque, Michel; Welch, Vivian; Tugwell, Peter

    2014-01-01

    Background The movement towards evidence-based practice makes explicit the need for access to current best evidence to improve health. Advances in electronic technologies have made health information more available, but does availability affect the rate of use of evidence in practice? Objectives To assess the effectiveness of interventions intended to provide electronic retrieval (access to information) to health information by healthcare providers to improve practice and patient care. Search methods We obtained studies from computerized searches of multiple electronic bibliographic databases, supplemented by checking reference lists, and consultation with experts. Selection criteria Randomized controlled trials (RCTs) including cluster randomized trials (CRCTs), controlled clinical trials (CCT), and interrupted time series analyses (ITS) of any language publication status examining interventions of effectiveness of electronic retrieval of health information by healthcare providers. Data collection and analysis Duplicate relevancy screening of searches, data abstraction and risk of bias assessment was undertaken. Main results We found two studies that examined this question. Neither study found any changes in professional behavior following an intervention that facilitated electronic retrieval of health information. There was some evidence of improvements in knowledge about the electronic sources of information reported in one study. Neither study assessed changes in patient outcomes or the costs of provision of the electronic resource and the implementation of the recommended evidence-based practices. Authors’ conclusions Overall there was insufficient evidence to support or refute the use of electronic retrieval of healthcare information by healthcare providers to improve practice and patient care. PMID:19588361

  20. Content Based Image Retrieval and Information Theory: A General Approach.

    ERIC Educational Resources Information Center

    Zachary, John; Iyengar, S. S.; Barhen, Jacob

    2001-01-01

    Proposes an alternative real valued representation of color based on the information theoretic concept of entropy. A theoretical presentation of image entropy is accompanied by a practical description of the merits and limitations of image entropy compared to color histograms. Results suggest that image entropy is a promising approach to image…