Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 04. Juni 2021)
1Green, R. ; Bean, C.A.: Aligning systems of relationships.
In: Knowledge organization, information systems and other essays: Professor A. Neelameghan Festschrift. Ed. by K.S. Raghavan and K.N. Prasad. New Delhi : Ess Ess Publications, 2006. S.111-128.
Abstract: The lateral relations of Neelameghan and Raghavan are mapped to their closest correspondents in FrameNet. Analvsis of this alignment highlights important characteristics of each system of relationships and reveals varying degrees of compatibility between them.
Themenfeld: Theorie verbaler Dokumentationssprachen
2Bean, C.A.: Hierarchical relationships used in mapping between knowledge structures.
In: Knowledge organization for a global learning society: Proceedings of the 9th International ISKO Conference, 4-7 July 2006, Vienna, Austria. Hrsg.: G. Budin, C. Swertz u. K. Mitgutsch. Würzburg : Ergon Verlag, 2006. S.389-394.
(Advances in knowledge organization; vol.10)
Abstract: User-designated Broader-Narrower Term pairs were analyzed to better characterize the nature and structure of the relationships between the pair members, previously determined by experts to be hierarchical in nature. Semantic analysis revealed that almost three-quarters (72%) of the term pairs were characterized as is-a (-kind-of) relationships and the rest (28%) as part-whole relationships. Four basic patterns of syntactic specification were observed. Implications of the findings for mapping strategies are discussed.
Inhalt: Vgl.: http://www.ergon-verlag.de/isko_ko/tocs/0497f79b0c0b3ed06/0497f79b0c0c7c33f/index.php.
Themenfeld: Semantische Interoperabilität ; Wissensrepräsentation
3Bean, C.A. ; Corn, M.: Extramural funding opportunities in bioinformatics from the National Library of Medicine : an integrated foundation for discovery.
In: Journal of the American Society for Information Science and Technology. 56(2005) no.5, S.551-556.
Abstract: National Library of Medicine (NLM) extramural programs in bioinformatics are described in the context of National Institutes of Health (NIH) funding mechanisms and illustrated through a sampling of recently funded grants. The NIH application, evaluation, and funding process is described as used by the NLM.
Anmerkung: Beitrag in einem special issue on bioinformatics
4Bean, C.A.: Representation of medical knowledge for automated semantic interpretation of clinical reports.
In: Knowledge organization and the global information society: Proceedings of the 8th International ISKO Conference 13-16 July 2004, London, UK. Ed.: I.C. McIlwaine. Würzburg : Ergon Verlag, 2004. S.239-244.
(Advances in knowledge organization; vol.9)
Abstract: A set of cardiac catheterisation case reports was analysed to identify and encode for automated interpretation of the semantic indicators of location and severity of disease in coronary arteries. Presence of disease was indicated by the use of specific or general disease terms, typically with a modifier, while absence of disease was indicated by negation of similar phrases. Disease modifiers indicating severity could be qualitative or quantitative, and a 7-point severity scale was devised to normalise these modifiers based an relative clinical significance. Location of disease was indicated in three basic ways: By situation in arbitrary topographic divisions, by situation relative to a named structure, or by using named structures as boundary delimiters to describe disease extent. In addition, semantic indicators were identified for such topological relationships as proximity, contiguity, overlap, and enclosure. Spatial reasoning was often necessary to understand the specific localisation of disease, demonstrating the need for a general Spatial extension to the underlying knowledge base.
Inhalt: 1. Introduction In automated semantic interpretation, the expressions in natural language text are mapped to a knowledge model, thus providing a means of normalising the relevant concepts and relationships encountered. However, the ultimate goal of comprehensive and consistent semantic interpretation of unrestrained text, even within a single domain such as medicine, is still beyond the current state of the art of natural language processing. In order to scale back the complexity of the task of automated semantic interpretation, we have restricted our domain of interest to coronary artery anatomy and our text to cardiac catheterisation reports. Using a multi-phased approach, a staged series of projects is enhancing the development of a semantic interpretation system for free clinical text in the specific subdomain of coronary arteriography.
5Green, R. ; Bean, C.A. ; Hudon, M.: Universality and basic level concepts.
In: Challenges in knowledge representation and organization for the 21st century: Integration of knowledge across boundaries. Proceedings of the 7th ISKO International Conference Granada, Spain, July 10-13, 2002. Ed.: M. López-Huertas. Würzburg : Ergon Verlag, 2003. S.311-317.
(Advances in knowledge organization; vol.8)
Abstract: This paper examines whether a concept's hierarchical level affects the likelihood of its universality across schemes for knowledge representation and knowledge organization. Empirical data an equivalents are drawn from a bilingual thesaurus, a pair of biomedical vocabularies, and two ontologies. Conceptual equivalence across resources occurs significantly more often at the basic level than at subordinate or superordinate levels. Attempts to integrate knowledge representation or knowledge organization tools should concentrate an establishing equivalences at the basic level. 1. Rationale The degree of success attainable in the integration of multiple knowledge representation systems or knowledge organization schemes is constrained by limitations an the universality of human conceptual systems. For example, human languages do not all lexicalize the same set of concepts; nor do they structure (quasi-)equivalent concepts in the same relational patterns (Riesthuis, 2001). As a consequence, even multilingual thesauri designed from the outset from the perspective of multiple languages may routinely include situations where corresponding terms are not truly equivalent (Hudon, 1997, 2001). Intuitively, where inexactness and partialness in equivalence mappings across knowledge representation schemes and knowledge organizations schemes exist, a more difficult retrieval scenario arises than where equivalence mappings reflect full and exact conceptual matches. The question we address in this paper is whether a concept's hierarchical level af ects the likelihood of its universality/full equivalence across schemes for knowledge representation and knowledge organization. Cognitive science research has shown that one particular hierarchical level-called the basic level--enjoys a privileged status (Brown, 1958; Rosch et al., 1976). Our underlying hypothesis is that concepts at the basic level (e.g., apple, shoe, chair) are more likely to match across knowledge representation schemes and knowledge organization schemes than concepts at the superordinate (e.g., fruit, footwear, furniture) or subordinate (e.g., Granny Smith, sneaker, recliner) levels. This hypothesis is consistent with ethnobiological data showing that folk classifications of flora are more likely to agree at the basic level than at superordinate or subordinate levels (Berlin, 1992).
Themenfeld: Multilinguale Probleme
6Bean, C.A. ; Green, R.: Improving subject retrieval with frame representation.
In: Subject retrieval in a networked environment: Proceedings of the IFLA Satellite Meeting held in Dublin, OH, 14-16 August 2001 and sponsored by the IFLA Classification and Indexing Section, the IFLA Information Technology Section and OCLC. Ed.: I.C. McIlwaine. München : Saur, 2003. S.114-121.
(UBCIM publications: new series; vol.25)
Abstract: Frames are integrated structures that address equivalence, hierarchical, and associative relationships. The richness of their internal organization and extemal relationality provide power and flexibility in meeting user needs for both high recall and high precision, as required.
7Bodenreider, O. ; Bean, C.A.: Relationships among knowledge structures : vocabulary integration within a subject domain.
In: Relationships in the organization of knowledge. Eds.: Bean, C.A. u. R. Green. Boston, MA : Kluwer Academic, 2001. S.81-98.
(Information science and knowledge management; vol.2)
Abstract: The structure of terminology systems can be seen as one way to organize knowledge. This paper focuses an three types of relationships among terms: synonymy, hierarchical relationships, and explicit mapping relationships. Examples drawn from various medical vocabularies illustrate each type of relationship. The integration of disparate terminological knowledge structures in the Unified Medical Language System is presented and discussed.
Themenfeld: Theorie verbaler Dokumentationssprachen
8Bean, C.A. ; Green, R.: Relevance relationships.
In: Relationships in the organization of knowledge. Eds.: Bean, C.A. u. R. Green. Boston, MA : Kluwer Academic, 2001. S.115-132.
(Information science and knowledge management; vol.2)
Abstract: Relevance arises from relationships between user needs and documents/information. In the quest for relevant retrieval, some content-based relationships are best used initially to cast a net that emphasizes recall, while others, both content- and non-content-based, are best used subsequently as filtering devices to achieve better precision. Topical relevance, the primary factor in the initial retrieval operation, extends far beyond topic matching, as often assumed. Empirical studies demonstrate that topical relevance relationships are drawn from a broad but systematic inventory of semantic relationships.
9Bean, C.A.: Mapping down : semantic and structural relationships in user-designated broader-narrow term pairs.
In: Dynamism and stability in knowledge organization: Proceedings of the 6th International ISKO-Conference, 10-13 July 2000, Toronto, Canada. Ed.: C. Beghtol et al. Würzburg : Ergon, 2000. S.301-305.
(Advances in knowledge organization; vol.7)
Abstract: The NLM/AHCPR Large-Scale Vocabulary Test data set was used to investigate the nature of ad hoc relationships formed when users mapped broader to narrower terms as the closest available conceptual match. Among the 1,162 term pairs examined, the most common semantic differences were based on anatomical or functional distinctions between the terms. As expected, modification accounted for the majority of syntagmatic specifications characterized, but hierarchical specification accounted for over a fifth of the mappings
10Bean, C.A.: Analysis of non-hierarchical associative relationships among Medical Subject Headings (MeSH) : anatomical and related terminology.
In: Knowledge organization and change: Proceedings of the Fourth International ISKO Conference, 15-18 July 1996, Library of Congress, Washington, DC. Ed.: R. Green. Frankfurt : INDEKS, 1996. S.80-86.
(Advances in knowledge organization; vol.5)
Abstract: Implicit associative relationships among MeSH headings relevant to clinical anatomy were investigated to determine the extent to which they could be characterized, organized, and structured, and the degree to which this process might be automated was assessed
Objekt: MeSH ; UMLS