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Articles 1 - 7 of 7

Full-Text Articles in Social and Behavioral Sciences

A Simplified Form Of Condensed Detachment, M W. Bunder Jan 1995

A Simplified Form Of Condensed Detachment, M W. Bunder

Faculty of Engineering and Information Sciences - Papers: Part A

This paper gives a simple, elegant statement of the condensed detachment rule that is independent of most general unifiers and proves that this is equivalent to the longer, more usual, formulation.


The Formation Of Ternary Compound Fe3mo3c By Ball Milling, L M. Di, Andrzej Calka, Z L. Li, J S. Williams Jan 1995

The Formation Of Ternary Compound Fe3mo3c By Ball Milling, L M. Di, Andrzej Calka, Z L. Li, J S. Williams

Faculty of Engineering and Information Sciences - Papers: Part A

Ball milling of Mo in nitrogen and ammonia gases has been studied. After heating, the formation of an intriguing ternary compound, Fe3Mo3C1−x , was observed as a result of Fe (and C) contamination from the milling apparatus. For a comparison, mechanical alloying of Fe–Mo–C powders with a stoichiometric composition of Fe3Mo3C was also performed and again an Fe–Mo–C alloy was obtained after milling.Thermal analysis shows a single transition peak for the formation of both the Fe3Mo3C phase in the latter case and ...


Extending Multipliers From Semigroups, Marcelo Laca, Iain Raeburn Jan 1995

Extending Multipliers From Semigroups, Marcelo Laca, Iain Raeburn

Faculty of Engineering and Information Sciences - Papers: Part A

A multiplier on a normal subsemigroup of a group can be extended to a multiplier on the group. This is used to show that normal cancellative semigroups have the same second cohomology as the group they generate, generalising earlier results of Arveson, Chernoff, and Dinh. The main tool is a dilation theorem for isometric multiplier representations of semigroups.


Induced C*-Algebras And Landstad Duality For Twisted Coactions, John C. Quigg, Iain Raeburn Jan 1995

Induced C*-Algebras And Landstad Duality For Twisted Coactions, John C. Quigg, Iain Raeburn

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Mine Boundary Detection Using Markov Random Field Models, Xia Hua, Jennifer L. Davidson, Noel A. Cressie Jan 1995

Mine Boundary Detection Using Markov Random Field Models, Xia Hua, Jennifer L. Davidson, Noel A. Cressie

Faculty of Engineering and Information Sciences - Papers: Part A

Detection of objects in images in an automated fashion is necessary for many applications, including automated target recognition. In this paper, we present results of boundary detection using Markov random fields. Once the boundaries of regions are detected, object recognition can be conducted to classify the regions within the boundaries. Thus, an approach that gives good boundary detection is very important in many automated target recognition systems. Our algorithm for boundary detection combines a Bayesian approach with a histogram specification technique to locate edges of objects that have a closed-loop boundary. The boundary image is modeled by a Markov random ...


Comparison Of Two Methods For Detection Of Cryptosporidium & Giardia In Water, Eva C. Nieminski, Frank W. Schaefer Iii, Jerry E. Ongerth Jan 1995

Comparison Of Two Methods For Detection Of Cryptosporidium & Giardia In Water, Eva C. Nieminski, Frank W. Schaefer Iii, Jerry E. Ongerth

Faculty of Engineering and Information Sciences - Papers: Part A

The steps of two immunofluorescent-antibody-based detection methods were evaluated for their efficiencies in detecting Giardia cysts and Cryptosporidium oocysts. The two methods evaluated were the American Society for Testing and Materials proposed test method for Giardia cysts and Cryptosporidium oocysts in low-turbidity water and a procedure employing sampling by membrane filtration, Percoll-Percoll step gradient, and immunofluorescent staining. The membrane filter sampling method was characterized by higher recovery rates in all three types of waters tested: raw surface water, partially treated water from a flocculation basin, and filtered water. Cyst and oocyst recovery efficiencies decreased with increasing water turbidity regardless of ...


Molecular Epidemiology Of A Fast-Food Restaurant-Associated Outbreak Of Escherichia Coli O157:H7 In Washington State, Linda M. Grimm, Marcia Goldoft, John Kobayashi, Jay H. Lewis, Dalia Alfi, Ann Marie Perdichizzi, Phillip I. Tarr, Jerry E. Ongerth, Steve L. Moseley, Mansour Samadpour Jan 1995

Molecular Epidemiology Of A Fast-Food Restaurant-Associated Outbreak Of Escherichia Coli O157:H7 In Washington State, Linda M. Grimm, Marcia Goldoft, John Kobayashi, Jay H. Lewis, Dalia Alfi, Ann Marie Perdichizzi, Phillip I. Tarr, Jerry E. Ongerth, Steve L. Moseley, Mansour Samadpour

Faculty of Engineering and Information Sciences - Papers: Part A

We studied the molecular epidemiology of the recent fast-food restaurant chain-associated Escherichia coli O157:H7 outbreak in Washington State. Genomic DNAs prepared from strains isolated from 433 patients were probed with radiolabelled Shiga-like toxin (SLT) I and SLT II genes and bacteriophage l DNA and were subsequently analyzed for their restriction fragment length polymorphism (RFLP) patterns. The SLT RFLP and l RFLP profiles of an E. coli O157:H7 strain isolated from the incriminated beef and prototype patient were compared with those of the patient isolates for determination of the concordance between patterns. Of the 377 patients with primary and ...