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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

PRECIS as a multilingual system : A search for language-independent explanations

Austin, D. January 1982 (has links)
No description available.
12

Biological sequence indexing using persistent Java

Pustułka-Hunt, Elżbieta Katarzyna January 2001 (has links)
No description available.
13

The use of PRECIS in indexing Chinese documents : an experimental study

Hsueh, Li-Kuei January 1990 (has links)
The main factors which prompted the present study were: (1) PRECIS has a linguistic universal feature for computerized subject indexing; (2) the largest Chinese bibliography and index published by the National Central Library of Taiwan still lack subject indexes; (3) both mainland China and Taiwan have created their bibliographic databases based on UNIMARC; and (4) the field 670 of the UNIMARC is reserved for PRECIS. This study has aimed to experiment with PRECIS for indexing Chinese documents, generate Chinese subject indexes using PRECIS, and suggest the use of PRECIS in online retrieval in Chinese bibliographic databases. The last objective is an assumption which was based on the achievement of the first objective.
14

Indexing Linked Data / Indexing Linked Data

Conicov, Andrei January 2012 (has links)
The fast evolution of the World Wide Web has offered the possibility to publish a huge amount of linked documents. Each such document represents a valuable piece of information. Linked Data is the term used to describe a method of exposing and connecting such documents. Even if this method is still in an experimental phase, it is already hard to process all existing data sources and the most obvious solution is to try and index them. The study addresses questions on how to design an index that will be capable to operate with millions of such entries. It analyses the existing projects and describes an index that may fulfill the requirements. The prototype implementation and the provided test results offer additional information about the index structure and effectiveness.
15

An innovative fully-distributed automatic object classification algorithm with a new content-based video indexing research platform

Hempel, Michael. January 1900 (has links)
Thesis (Ph.D.)--University of Nebraska-Lincoln, 2007. / Title from title screen (site viewed Dec. 4, 2007). PDF text: ca. 240 p. : ill. UMI publication number: AAT 3271930. Includes bibliographical references. Also available in microfilm and microfiche formats.
16

Effectiveness of index size reduction techniques

Jacobson, Bryan L. 19 February 1992 (has links)
Index size savings from three techniques are measured. The three techniques are: 1) eliminating common, low information words found in a "stop list" (such as: of, the, at, etc.), 2) truncating terms by eliminating word stems (such as: -s, -ed, -ing, etc.), and 3) simple data compression. Savings are measured on two moderately large collections of text. The index size savings that result from using the techniques individually and in combination are reported. The impact on query performance in terms of speed, recall and precision are estimated. / Graduation date: 1992
17

The subject indexing process : an investigation of problems in knowledge representation /

Mai, Jens-Erik, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 318-343). Available also in a digital version from Dissertation Abstracts.
18

Automatic Thesaurus Generation for an Electronic Community System

Chen, Hsinchun, Schatz, Bruce R., Yim, Tak, Fye, David 04 1900 (has links)
Artificial Intelligence Lab, Department of MIS, University of Arizona / This research reports an algorithmic approach to the automatic generation of thesauri for electronic community systems. The techniques used included term filtering, automatic indexing, and cluster analysis. The testbed for our research was the Worm Community System, which contains a comprehensive library of specialized community data and literature, currently in use by molecular biologists who study the nematode worm C. elegans. The resulting worm thesaurus included 2709 researchers’ names, 798 gene names, 20 experimental methods, and 4302 subject descriptors. On average, each term had about 90 weighted neighboring terms indicating relevant concepts. The thesaurus was developed as an online search aide. We tested the worm thesaurus in an experiment with six worm researchers of varying degrees of expertise and background. The experiment showed that the thesaurus was an excellent “memory-jogging” device and that it supported learning and serendipitous browsing. Despite some occurrences of obvious noise, the system was useful in suggesting relevant concepts for the researchers’ queries and it helped improve concept recall. With a simple browsing interface, an automatic thesaurus can become a useful tool for online search and can assist researchers in exploring and traversing a dynamic and complex electronic community system.
19

The Practice of Design: Creating Local Vocabularies for Images

Weedman, Judith January 2004 (has links)
Herb Simon, the pioneer cognitive scientist, computer scientist, economist, and Nobel prize winner, wrote that design is the core of all professional activity (Simon, 1996). The natural sciences are concerned with how things are; the science of design is concerned with how things ought to be â with devising artifacts to attain goalsâ (Schon, 1990, p. 110). In other words, according to Simon, what professionals do is to â transform an existing state of affairs, a problem, into a preferred state, a solution â (Schon, p. 111). A key area of professional design in library and information science is the creation of systems for the organization of knowledge. The purpose of this research project is to examine the design process in knowledge organization using design theory which originated in other fields. There is a rich literature based on research in the fields of architecture, engineering, software design, clinical psychology, city planning, and other professions. I used the themes originating in this literature to explore design in LIS. In LIS, design work related to knowledge organization is carried out simultaneously at multiple levels in the devising of national standards for design such as the NISO Guidelines for the Construction, Format, and Management of Monolingual Thesauri, in the maintenance of major vocabularies such as the Library of Congressâ s Thesaurus for Graphic Materials, in the design of vocabularies intended to be diffused widely such as the Art & Architecture Thesaurus, and at the local level in the creation of descriptors and classification systems for individual collections of materials. The specific focus of this research project is design of vocabularies â in which I include subject headings, descriptors, keywords, captions, and classification systems -- for local collections of images.
20

Semantic Indexing and Searching Using a Hopfield Net

Chen, Hsinchun, Zhang, Yin, Houston, Andrea L. January 1998 (has links)
Artificial Intelligence Lab, Department of MIS, University of Arizona / This paper presents a neural network approach to document semantic indexing. A Hopfield net algorithm was used to simulate human associative memory for concept exploration in the domain of computer science and engineering. INSPEC, a collection of more than 320,000 document abstracts from leading journals, was used as the document testbed. Benchmark tests confirmed that three parameters (maximum number of activated nodes, E - maximum allowable error, and maximum number of iterations) were useful in positively influencing network convergence behavior without negatively impacting central processing unit performance. Another series of benchmark tests was performed to determine the effectiveness of various filtering techniques in reducing the negative impact of noisy input terms. Preliminary user tests confirmed our expectation that the Hopfield net algorithm is potentially useful as an associative memory technique to improve document recall and precision by solving discrepancies between indexer vocabularies and end-user vocabularies.

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