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1992

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Full-Text Articles in Science and Technology Studies

Abduction In Annotated Logic Programming, Krishnaprasad Thirunarayan Oct 1992

Abduction In Annotated Logic Programming, Krishnaprasad Thirunarayan

Kno.e.sis Publications

The author investigates techniques to make the logic programming paradigm more expressive for knowledge representation, while simultaneously retaining the computational advantages of efficiency and simplicity. He extends the annotated language of K. Thirunarayan and K. Kifer (1989) in various directions to obtain an enriched representation language. In particular, rule bodies are permitted to be a conjunction of literals, and the rules to be recursive. A class of annotated logic programs called the stratified programs is identified which can be given a unique supported minimal Herbrand model as their meaning. Abductive reasoning is integrated into this annotated logic framework. The notion ...


Using Flexible Transactions To Support Multisystem Telecommunication Applications, Mansoor Ansari, Linda Ness, Marek Rusinkiewicz, Amit P. Sheth Aug 1992

Using Flexible Transactions To Support Multisystem Telecommunication Applications, Mansoor Ansari, Linda Ness, Marek Rusinkiewicz, Amit P. Sheth

Kno.e.sis Publications

Service order provisioning is an important telecommunication application that automates the process of providing telephone services in response to the customer requests. It is an example of a multi-system application that requires access to multiple, independently developed application systems and their databases. In this paper, we describe the design and implementation of a prototype system1 that supports the execution of the Flexible Transactions and its use to develop the service order provisioning application. We argue that such approach may be used to support the development of multi-system, flow-through processing applications in a systematic and organized manner. Its advantages include fast ...


Algorithms For Structural Schema Integration, James Geller, Ashish Mehra, Yehoshua Perl, Erich Neuhold, Amit P. Sheth Jun 1992

Algorithms For Structural Schema Integration, James Geller, Ashish Mehra, Yehoshua Perl, Erich Neuhold, Amit P. Sheth

Kno.e.sis Publications

Current view and schema integration methodologies are driven by semantic considerations, and allow integration of objects only if that is valid from semantic and structural viewpoints. We had introduced a new integration technique called structural integration. It permits integration of objects that have structural similarities, even if they differ semantically. This technique uses the object-oriented Dual Model which separates the representation of structure and semantics.

In this paper we introduce algorithms for structural integration. We apply these algorithms to integrate two views of a large university database schema which had significant structural similarities but differed semantically.


"Who Is A Scientist?": Effects Of An Intervention To Change Students' Ideas About Science And Scientists, Lauren A. Foley May 1992

"Who Is A Scientist?": Effects Of An Intervention To Change Students' Ideas About Science And Scientists, Lauren A. Foley

Critical and Creative Thinking Capstones Collection

Advocates for improving science literacy have focused much attention on the negative impressions about science and scientists held by many Americans. The image of scientists as 'nerdy' bespectacled men in laboratories has been related by some researchers to people's lack of interest in pursuing science. This thesis analyzes one component of a program aimed at changing that stereotype. The Science-By-Mail (tm) program at the Museum of Science in Boston was designed to give students a more inclusive image of scientists. Central to the program was the creation of pen-pal relationships between students in grades 4-9 with scientists who did ...


Front Matter Jan 1992

Front Matter

BEADS: Journal of the Society of Bead Researchers

No abstract provided.


Table Of Contents (V.4, 1992) Jan 1992

Table Of Contents (V.4, 1992)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.


The Beads Of Roman And Post-Medieval Antwerpen, Belgium, Karlis Karklins, Tony Oost Jan 1992

The Beads Of Roman And Post-Medieval Antwerpen, Belgium, Karlis Karklins, Tony Oost

BEADS: Journal of the Society of Bead Researchers

Excavations conducted at several sites in Antwerpen, a principal city and seaport on the Schelde River in northern Belgium, have uncovered a small but significant collection of glass beads. These range from a decorated specimen of the Roman period to tubular square- and star-sectioned beads of the 16th-17th centuries. The Post-Medieval specimens, found in the cesspits of merchants' homes, give us an idea of what Antwerpen was exporting during the early part of this period.


The Beads Of Cameroon, Pierre Harter Jan 1992

The Beads Of Cameroon, Pierre Harter

BEADS: Journal of the Society of Bead Researchers

Glass beads have long played an important role in the art and culture of Cameroon, a country situated on the east side of the Gulf of Guinea in West Central Africa. This article reviews the different kinds of drawn and wound glass beads that have found broad acceptance in west-central Cameroon and discusses their diverse applications. Beads of other materials, as well as cowries and buttons, are also dealt with.


Beads: Journal Of The Society Of Bead Researchers - Volume 4 (Complete) Jan 1992

Beads: Journal Of The Society Of Bead Researchers - Volume 4 (Complete)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.


Book Reviews And End Matter Jan 1992

Book Reviews And End Matter

BEADS: Journal of the Society of Bead Researchers

Moss and Scherer: The New Beadwork reviewed by Olive R. Jones

Karklins: Trade Ornament Usage Among the Native Peoples of Canada: A Source Book reviewed by Olga Klimko

Camps-Fabrer: Bijoux berbères d'Algérie reviewed by Marie-José Opper

Kurinsky: The Glassmakers: An Odyssey of the Jews, The First Three Thousand Years reviewed by Peter Francis, Jr.

Brill and Martin: Scientific Research in Early Chinese Glass reviewed by Roderick Sprague


Beads In The Lives Of The Peoples Of Southern Togo, West Africa, Pascale Nourisson Jan 1992

Beads In The Lives Of The Peoples Of Southern Togo, West Africa, Pascale Nourisson

BEADS: Journal of the Society of Bead Researchers

Beads are objects of infinite diversity among the Mina-Guen of southern Togo. They accompany the people in all the material and spiritual aspects of their existence. However, while the beads serve such varied functions as ornaments, currency and emblems of wealth and prestige, they find their principal use in voodoo.


On The Date Of The Copper Age In The United States, A. Morlot Jan 1992

On The Date Of The Copper Age In The United States, A. Morlot

BEADS: Journal of the Society of Bead Researchers

During the mid-19th century, some scholars believed that the chevron beads found in early Indian graves had been brought to North America by globe-trotting Phoenicians or representatives of some other higher European civilization. A paper on the subject published in 1862 by one of the theory's proponents is reproduced here, along with contemporary descriptions and illustrations of the beads under discussion.


Identifying Beads Used In The 19th-Century Central East Africa Trade, Karlis Karklins Jan 1992

Identifying Beads Used In The 19th-Century Central East Africa Trade, Karlis Karklins

BEADS: Journal of the Society of Bead Researchers

A wide variety of glass beads poured into Central East Africa during the second half of the 19th century as explorers, missionaries and others made their way into the uncharted interior. Each kind had a name and value that, much to the chagrin of the travelers and present-day researchers, varied from one region to another. This article synthesizes what historical documentation reveals about some of the more significant beads in the trade with an eye to identifying the actual beads that are represented.


Captions And Color Plates (V.4, 1992) Jan 1992

Captions And Color Plates (V.4, 1992)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.


Executing Multidatabase Transactions, Mansoor Ansari, Marek Rusinkiewicz, Linda Ness, Amit P. Sheth Jan 1992

Executing Multidatabase Transactions, Mansoor Ansari, Marek Rusinkiewicz, Linda Ness, Amit P. Sheth

Kno.e.sis Publications

In a multidatabase environment, the traditional transaction model has been found to be too restrictive. Therefore, several extended transaction models have been proposed in which some of the requirements of transaction, such as isolation or atomicity, are optional. The authors describe one of such extensions, the flexible transaction model and discuss the scheduling of transactions involving multiple autonomous database systems managed by heterogeneous DBMS.

The scheduling algorithm for flexible transactions is implemented using L.0, a logically parallel language which provides a framework for concisely specifying the multidatabase transactions and for scheduling them. The key aspects of a flexible transaction ...


Zeckendorf Representations Using Negative Fibonacci Numbers, M W. Bunder Jan 1992

Zeckendorf Representations Using Negative Fibonacci Numbers, M W. Bunder

Faculty of Engineering and Information Sciences - Papers: Part A

It is well known that every positive integer can be represented uniquely as a sum of distinct, nonconsecutive Fibonacci numbers (see, e.g., Brown [1]. This representation is called the Zeckendorf representation of the positive integer. Other Zeckendorf-type representations where the Fibonacci numbers are not necessarily consecutive are possible. Brown [2] considers one where a maximal number of distinct Fibonacci numbers are used rather than a minimal number.


The Response To Selection Of Different Procedures For The Analysis Of Early Generation Variety Trials, Brian R. Cullis, A. C. Gleeson, F. M. Thomson Jan 1992

The Response To Selection Of Different Procedures For The Analysis Of Early Generation Variety Trials, Brian R. Cullis, A. C. Gleeson, F. M. Thomson

Faculty of Engineering and Information Sciences - Papers: Part A

A simulation study was conducted to determine the relative response to selection of a one-dimensional spatial analysis of field experiments (SAFE) specifically adapted for early generation trials. The primary purpose of the analysis in these trials is to obtain accurate estimates of genotypic effects of the unreplicated test lines by adjusting for local variation, using either the yields of all neighbouring plots or the yields of neighbouring plots of (replicated) check varieties. The response to selection of the SAFE analysis, relative to the use of unadjusted yields of test line plots, was consistently greater than the relative response to selection ...


On The Structure Of Twisted Group C*-Algebras, Judith A. Packer, Iain Raeburn Jan 1992

On The Structure Of Twisted Group C*-Algebras, Judith A. Packer, Iain Raeburn

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Representations Of Finite Groups And Cuntz-Krieger Algebras, M Mann, Iain Raeburn, C Sutherland Jan 1992

Representations Of Finite Groups And Cuntz-Krieger Algebras, M Mann, Iain Raeburn, C Sutherland

Faculty of Engineering and Information Sciences - Papers: Part A

We investigate the structure of the C*-algebras (9ρ constructed by Doplicher and Roberts from the intertwining operators between the tensor powers of a representation ρ of a compact group. We show that each Doplicher-Roberts algebra is isomorphic to a corner in the Cuntz-Krieger algebra (9A of a {0,1}-matrix A = Aρ associated to ρ. When the group is finite, we can then use Cuntz's calculation of the K-theory of (9A to compute K*((9ρ).


Current Periodicals: Subject Access The Mac Way, Connie Foster Jan 1992

Current Periodicals: Subject Access The Mac Way, Connie Foster

DLTS Faculty Publications

At Western Kentucky University, the Library uses a Macintosh to filter and edit information on current serials to produce a periodicals guide for faculty and students. This tool has proven useful in collections development, reference and serials control within the Library. It has also provided the Library with a means to communicate to the academic community the extent of serials holdings in specific disciplines. Additionally, the Library has used the information within the guide to generate other lists of serials holdings for its patrons.