Download Conceptual Information Retrieval: A Case Study in Adaptive by Michael L. Mauldin PDF

By Michael L. Mauldin

The infonnation revolution is upon us. while the economic revolution heralded the systematic augmentation of human actual obstacles via har­ nessing exterior strength assets, the infonnation revolution strives to enhance human reminiscence and psychological processing obstacles by way of harnessing exterior computational assets. pcs can collect. transmit and output even more infonnation and in a extra well timed type than extra con­ ventional revealed or spoken media. Of larger curiosity, in spite of the fact that, is the computer's skill to technique, classify and retrieve infonnation selectively in line with the desires of every human person. One can't drink from the fireplace hydrant of infonnation with no being instantly flooded with beside the point textual content. contemporary technological advances resembling optical personality readers basically exacerbate the matter through expanding the quantity of digital textual content. simply as steam and inner combustion engines introduced strong power assets below keep an eye on to yield valuable paintings within the commercial revolution, so needs to we construct computational engines that keep an eye on and observe the large infonnation resources that they could yield worthwhile wisdom. details technology is the research of systematic capability to regulate, classify, technique and retrieve big quantities of infonnation in digital fonn. In par­ ticular, numerous methodologies were built to categorise texts manually by means of annies of human indexers, as illustrated fairly basically on the nationwide Library ofMedicine, and lots of computational innovations were built to go looking textual facts bases immediately, similar to full-text key-phrase searches. In general.

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This is because the major purpose of the classification is to determine where to put each book on the shelves. Since books cannot be in two places at one time (unlike electronic text), they cannot be assigned two different Dewey decimal classifications. Figure 2-2 shows the major classifications of the Dewey decimal system [Grolier 85]. 000·090 100-190 200·290 300-390 400-490 500-590 600-690 700·790 800-890 900·990 Generalities Philosophy and related disciplines Religion Social sciences Language Pure sciences Technology (applied sciences) The arts Literature Geography and history Figure 2-2: Major Divisions of the Dewey Decimal System Of course one problem with any precoordinate system is what to do with texts that span categories.

In fact, most retrieval systems today do very little linguistic analysis of the texts they index. One limited use of syntactic analysis is to identify phrase boundaries so that more specific index terms can be built from those phrases. Phrase indexing can improve retrieval performance for concepts that are not represented by a single word. For example, if we wish to retrieve documents about computer science, we might try this query: [ comput$ AND acienc. ] which would match at least the following phrases: the computer science department the discipline of computing science the science of computing but would also match across phrases, such as: the use of computers in materials science Just using the query: [ comput$ ADJ acienc.

Examples here at Carnegie Mellon include the EMACS text editor [Gosling 83], the USENET news reading program [Horton 83]. Regular expressions provide the basis for a more sophisticated string matching algorithm, and this technique is used by perllaps the most widely used retrieval system in university computing: the Unix GREP command [Bell Labs 79]. " Indeed, the staff at McDonald Observatory were unimpressed by our efforts to index their library of old radio scripts with FERRET. They use GREP to find old stories on a particular topic.

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