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Articles 2911 - 2936 of 2936
Full-Text Articles in Social and Behavioral Sciences
A Three-Dimensional Numerical Model Of The Response Of The Australian North West Shelf To Tropical Cyclones, Song-Ping Zhu, Jorg Imberger
A Three-Dimensional Numerical Model Of The Response Of The Australian North West Shelf To Tropical Cyclones, Song-Ping Zhu, Jorg Imberger
Faculty of Engineering and Information Sciences - Papers: Part A
A three-dimensional barotropic and baroclinic model is developed to simulate currents and temperature changes induced by tropical cyclones traversing the continental shelf and slope region of the Australian North West Shelf. The model is based on a layered, explicit, finite difference formulation using the nonlinear primitive equations with an embedded entrainment scheme; a mixed-surface-layer interface is defined, which is allowed to shift from one interface to another, depending on the strength of a storm. The model has been tested by simulating the currents and temperature changes induced by tropical cyclones Orson and Ian. The modelled currents and temperatures agreed well …
The Strong Relevance Logics, Martin W. Bunder
The Strong Relevance Logics, Martin W. Bunder
Faculty of Engineering and Information Sciences - Papers: Part A
The tautology p - q - p is not a theorem of the various relevance logics (see Anderson and Belnap [1]) because q is not considered to be relevant in the derivation of final p. We can take this lack of relevance to mean simply that p-q-p could have been proved without q and its -, i.e., p-p. By the same criterion we could say that in ((p-p) -q) -q p-p is not relevant. In general we will say that any theorem A of an implicational logic is strongly relevant if there is no subpart B ! which can be …
Classical Versions Of Bci, Bck And Bciw Logics, Martin W. Bunder, John K. Slaney
Classical Versions Of Bci, Bck And Bciw Logics, Martin W. Bunder, John K. Slaney
Faculty of Engineering and Information Sciences - Papers: Part A
The question is, is there a formula X, independent of B,C,K1, I and W that creates distinct subclassical logics BCIX,BCKX and BCIWX, while BCKWX is the full classical implicational logic TV?
Crossed Products By Semigroups Of Endomorphisms And The Toeplitz Algebras Of Ordered Groups, Sriwulan Adji, Marcelo Laca, May Nilsen, Iain Raeburn
Crossed Products By Semigroups Of Endomorphisms And The Toeplitz Algebras Of Ordered Groups, Sriwulan Adji, Marcelo Laca, May Nilsen, Iain Raeburn
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Occurrence Of Shiga-Like Toxin-Producing Escherichia Coli In Retail Fresh Seafood, Beef, Lamb, Pork, And Poultry From Grocery Stores In Seattle, Washington, Mansour Samadpour, Jerry Ongerth, J. Liston, Nhiem Tran, Dong Nguyen, Thomas S. Whittam, Richard Wilson, Phillip I. Tarr
Occurrence Of Shiga-Like Toxin-Producing Escherichia Coli In Retail Fresh Seafood, Beef, Lamb, Pork, And Poultry From Grocery Stores In Seattle, Washington, Mansour Samadpour, Jerry Ongerth, J. Liston, Nhiem Tran, Dong Nguyen, Thomas S. Whittam, Richard Wilson, Phillip I. Tarr
Faculty of Engineering and Information Sciences - Papers: Part A
Fresh meat, poultry, and seafood purchased from Seattle area grocery stores were investigated for the presence of Shiga-like toxin-producing Escherichia coli by using DNA probes for Shiga-like toxin (SLT) genes I and II. Of the 294 food samples tested, 17% had colonies with sequence homology to SLT I and/or SLT II genes.
Competition For Herbage By Phaulacridium Vittatum (Sjostedt) (Orthoptera:Acrididae) And Sheep During Summer Drought, P Bailey, A B. Frensham, A Hincks, M Newton
Competition For Herbage By Phaulacridium Vittatum (Sjostedt) (Orthoptera:Acrididae) And Sheep During Summer Drought, P Bailey, A B. Frensham, A Hincks, M Newton
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Systems Of Illative Combinatory Logic Complete For First Order Propositional And Predicate Calculus, Henk Barendregt, Martin Bunder, Wil Dekkers
Systems Of Illative Combinatory Logic Complete For First Order Propositional And Predicate Calculus, Henk Barendregt, Martin Bunder, Wil Dekkers
Faculty of Engineering and Information Sciences - Papers: Part A
Illative combinatory logic consists of the theory of combinators or lambda calculus extended by extra constants (and corresponding axioms and rules) intended to capture inference. The paper considers systems of illative combinatory logic that are sound for first-order propositional and predicate calculus. The interpretation from ordinary logic into the illative systems can be done in two ways: following the propositions-as-types paradigm, in which derivations become combinators or, in a more direct way, in which derivations are not translated. Both translations are closely related in a canonical way. The two direct translations turn out to be complete. The paper fulfills the …
Molecular Epidemiology Of Escherichia Coli 0157:H7 Strains By Bacteriophage A Restriction Fragment Length Polymorphism Analysis: Application To A Multistate Foodborne Outbreak And A Day-Care Center Cluster, Mansour Samadpour, Linda M. Grimm, B Desai, Dalia Alfi, Jerry E. Ongerth, Phillip I. Tarr
Molecular Epidemiology Of Escherichia Coli 0157:H7 Strains By Bacteriophage A Restriction Fragment Length Polymorphism Analysis: Application To A Multistate Foodborne Outbreak And A Day-Care Center Cluster, Mansour Samadpour, Linda M. Grimm, B Desai, Dalia Alfi, Jerry E. Ongerth, Phillip I. Tarr
Faculty of Engineering and Information Sciences - Papers: Part A
Genomic DNAs prepared from 168 isolates of Escherichia coli 0157:H7 were analyzed for restriction fragment length polymorphisms on Southern blots probed with bacteriophage A DNA. The isolates analyzed included strains from a recent large multistate outbreak of E. coli 0157:H7 infection associated with consumption of poorly cooked beef in restaurants, a day-care center cluster, and temporally and geographically unrelated isolates. E. coli 0157:H7 isolates recovered from the incriminated meat and from 61 (96.8%) of 63 patients from Washington and Nevada possessed identical A restriction fragment length patterns. The A restriction fragment length polymorphisms observed in 11 (91.7%) of 12 day-care …
Markov Pyramid Models In Image Analysis, Jennifer L. Davidson, Noel A. Cressie
Markov Pyramid Models In Image Analysis, Jennifer L. Davidson, Noel A. Cressie
Faculty of Engineering and Information Sciences - Papers: Part A
The use of statistical pattern recognition techniques in image processing has led to simplifying assumptions on the statistical interdependence of the pixel value of an image, which allow theoretical analysis and/or computational implementation to be achieved. For instance, the assumption of statistical independence of the values or that their joint distributions are multivariate normal, simplifies the analysis enormously. However, these results are very limiting in representing models for data, and do not allow for analysis of arbitrary spatial dependencies, in the data. One method for modeling two-dimensional data on a lattice array has been developed by Abend et al. called …
Stochastic Recognition Of Closed Object Boundaries In Images, J Helterbrand, Noel A. Cressie
Stochastic Recognition Of Closed Object Boundaries In Images, J Helterbrand, Noel A. Cressie
Faculty of Engineering and Information Sciences - Papers: Part A
Engineering-based edge detection techniques generally use local intensity information to identify whether a pixel location is part of a boundary. Boundaries are presumed present where sharp transitions in the observed intensities occur. Unfortunately, these approaches are sensitive to error and hidden partial boundaries, which hinders the determination of closed object boundaries. In this research, a method to obtain statistically optimal closed object boundaries is presented.
Representations Of Finite Groups And Cuntz-Krieger Algebras, M Mann, Iain Raeburn, C Sutherland
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).
On The Structure Of Twisted Group C*-Algebras, Judith A. Packer, Iain Raeburn
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.
Zeckendorf Representations Using Negative Fibonacci Numbers, M W. Bunder
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
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 …
The Zeckendorf Representation And The Golden Sequence, Martin Bunder, Keith Tognetti
The Zeckendorf Representation And The Golden Sequence, Martin Bunder, Keith Tognetti
Faculty of Engineering and Information Sciences - Papers: Part A
The Zeckendorf representation of a number is simply the representation of that number as the sum of distinct Fibonacci numbers. If the number of terms of this sum is minimized, that representation is unique, as also is the representation when the number of terms is maximized.
Statistical Image Algebra: A Bayesian Approach, Jennifer L. Davidson, Noel A. Cressie
Statistical Image Algebra: A Bayesian Approach, Jennifer L. Davidson, Noel A. Cressie
Faculty of Engineering and Information Sciences - Papers: Part A
A mathematical structure used to express image processing transforms, the AFATL image algebra has proved itself useful in a wide variety of applications. The theoretical foundation for the image algebra includes many important constructs for handling a wide variety of image processing problems: questions relating to linear and nonlinear transforms, including decomposition techniques [9], [5]; mapping of transformations to computer architectures [8], [4]; neural networks [1 1], [6]; recursive transforms [10]; and data manipulation on hexagonal arrays. However, statistical notions have been included only on a very elementary level in [12], and on a more sophisticated level in [2]. In …
Effect Of Postinfection Application Of Phosphorous (Phosphonic) Acid On The Incidence And Sporulation Of Plasmopara Viticola On Grapevine, T J. Wicks, P A. Magarey, M F. Wachtel, A B. Frensham
Effect Of Postinfection Application Of Phosphorous (Phosphonic) Acid On The Incidence And Sporulation Of Plasmopara Viticola On Grapevine, T J. Wicks, P A. Magarey, M F. Wachtel, A B. Frensham
Faculty of Engineering and Information Sciences - Papers: Part A
Phosphorous acid (H3P03) applied at 1.2 gIL up to 12 days after infection reduced the incidence and severity of Plasmopara vitieola. When applied up to 13 days after infection, H3P03 reduced sporulation. In some experiments, the postinfection activity of H3P03 was better than metalaxyl, while in other experiments it was less effective. Both fungicides applied after infection reduced the incidence and severity of disease on leaves and flower clusters, indicating that postinfection applications should reduce the production of inoculum and the consequent spread of disease within a vineyard. In most cases, the addition of copper oxychloride did not affect the …
Evaluation Of Dna Probes For Detection Of Shiga-Like-Toxin- Producing Escherichia Coli In Food And Calf Fecal Samples, Mansour Samadpour, John Liston, Jerry E. Ongerth, Phillip I. Tarr
Evaluation Of Dna Probes For Detection Of Shiga-Like-Toxin- Producing Escherichia Coli In Food And Calf Fecal Samples, Mansour Samadpour, John Liston, Jerry E. Ongerth, Phillip I. Tarr
Faculty of Engineering and Information Sciences - Papers: Part A
The use of DNA probes for Shiga-like toxin I (SLT-I) and SLT-II for detection of SLT-producing Escherichia coli (SLTEC) in foods and calf fecal samples was evaluated. Enrichment cultures were prepared from food or fecal samples. Colonies formed by plating of enrichment cultures were probed for SLTEC by colony hybridization. Alternatively, enrichment cultures were analyzed for SLTEC presence by dot blot. The lowest detected concentration of SLTEC in sample homogenates inoculated with E. coli 0157:H7 corresponded to 1.3 CFU/g of sample. Of the 44 food samples and 28 fecal samples from dairy calves tested by the colony hybridization method, 4 …
Identification Of Giardia Lamblia-Specific Antigens In Infected Human And Gerbil Feces By Western Immunoblotting, Henry H. Stibbs, Mansour Samadpour, Jerry E. Ongerth
Identification Of Giardia Lamblia-Specific Antigens In Infected Human And Gerbil Feces By Western Immunoblotting, Henry H. Stibbs, Mansour Samadpour, Jerry E. Ongerth
Faculty of Engineering and Information Sciences - Papers: Part A
Western immunoblot analysis of aqueous extracts of feces obtained from five giardiasis patients and from experimentally infected gerbils (Meriones unguiculatus) with rabbit antiserum to Giardia lamblia cysts has revealed antigens of three molecular weight groups. A stepladderlike, evenly-spaced set of strongly reactive antigens (darkest at a molecular weight [m.w.] of 55,000 to 70,000) appeared in the gerbil feces from day 4 (first experiment) or day 2 (second experiment) and lasted to about day 7 but disappeared completely by day 8 and did not reappear later. These antigenic bands were seen in gerbils infected with two isolates of G. lamblia. These …
Some Improvements To Turner's Algorithm For Bracket Abstraction, Martin W. Bunder
Some Improvements To Turner's Algorithm For Bracket Abstraction, Martin W. Bunder
Faculty of Engineering and Information Sciences - Papers: Part A
A computer handles A-terms more easily if these are translated into combinatory terms. This translation process is called bracket abstraction. The simplest abstraction algorithm-the (fab) algorithm of Curry (see Curry and Feys [6])-is lengthy to implement and produces combinatory terms that increase rapidly in length as the number of variables to be abstracted increases.
Backcountry Water Treatment To Prevent Giardiasis, Jerry E. Ongerth, Ron L. Johnson, Steven C. Macdonald, Floyd Frost, Henry H. Stibbs
Backcountry Water Treatment To Prevent Giardiasis, Jerry E. Ongerth, Ron L. Johnson, Steven C. Macdonald, Floyd Frost, Henry H. Stibbs
Faculty of Engineering and Information Sciences - Papers: Part A
This study was conducted to provide current information on the effectiveness of water treatment chemicals and filters for control of Giardia cysts in areas where treated water is not available. Four filters and seven chemical treatments were evaluated for both clear and turbid water at 10°C. Three contact disinfection devices were also tested for cyst inactivation. Filters were tested with 1-liter volumes of water seeded with 3 x 104 cysts of G. lamblia produced in gerbils inoculated with in vitro cultured trophozoites; the entire volume of filtrate was examined for cyst passage. Chemical treatments were evaluated at concentrations specified by …
Efficiency Of Neighbour Analysis For Replicated Variety Trials In Australia, Brian R. Cullis, A. C. Gleeson
Efficiency Of Neighbour Analysis For Replicated Variety Trials In Australia, Brian R. Cullis, A. C. Gleeson
Faculty of Engineering and Information Sciences - Papers: Part A
Use of a one-dimensional neighbour method of analysis in 1019 variety trials of a range of crops conducted by plant breeders in four states of Australia in 1985–87 resulted in an average reduction of 42% in variances of varietal yield differences compared with conventional randomized complete block analysis. Of these trials, 219 were designed as square, rectangular or generalized lattices and the average reduction in variances of varietal yields with incomplete block analysis and recovery of interblock information was 33%. The results emphasized that plots should be wide enough to avoid interplot competition, and that neighbour analysis is of most …
Relative Accuracy Of A Neighbour Method For Field Trials, W J. Lill, A C. Gleeson, Brian R. Cullis
Relative Accuracy Of A Neighbour Method For Field Trials, W J. Lill, A C. Gleeson, Brian R. Cullis
Faculty of Engineering and Information Sciences - Papers: Part A
Two scries of simulation experiments were used to investigate the accuracy of treatment and variance estimation with a neighbour analysis of field trials proposed by Gleeson & Cullis (1987). The first series examined the accuracy of residual maximum likelihood (REML) estimation of seven theoretical error models applicable to field trials. REML estimation provided accurate estimates of the variance parameters, but the Ftest of treatments was slightly biased upward (to +2·4%) for first differences models and slightly biased downwards (to –1·4%) for second differences models. The second series of simulations, based on 19 uniformity data sets, illustrated that treatment effects were …
Identification Of Cryptosporidium Oocysts In River Water, Jerry Ongerth, Henry Stibbs
Identification Of Cryptosporidium Oocysts In River Water, Jerry Ongerth, Henry Stibbs
Faculty of Engineering and Information Sciences - Papers: Part A
Water samples were collected from four rivers in Washington State and two rivers in California and examined for the presence of Cryptosporidium oocysts. Oocyst-sized particles were concentrated from 20-liter samples of water by membrane filtration, centrifugation, and differential sedimentation. The particle concentrate was then deposited on a 25-mm-diameter membrane filter for oocyst identification by indirect immunofluorescence assay. The identification procedure had a limit of detection of about five oocysts per liter. Cryptosporidium oocysts were found in each of 11 river water samples examined. Concentrations ranged from 2 to 112 oocysts per liter. The finding of Cryptosporidium oocysts in all samples …
Representations Of Crossed Products By Coactions And Principal Bundles, M B. Landstad, J Phillips, Iain Raeburn, C E. Sutherland
Representations Of Crossed Products By Coactions And Principal Bundles, M B. Landstad, J Phillips, Iain Raeburn, C E. Sutherland
Faculty of Engineering and Information Sciences - Papers: Part A
The main purpose of this paper is to establish a covariant representation theory for coactions of locally compact groups on C*-algebras (including a notion of exterior equivalence), to show how these results extend the usual notions for actions of groups on C*-algebras, and to apply these ideas to classes of coactions termed pointwise unitary and locally unitary to obtain a complete realization of the isomorphism theory of locally trivial principal G-bundles in this context. We are also able to obtain all (Cartan) principal G-bundles in this context, but their isomorphism theory remains elusive.
Immunofluorescence Detection Of Cryptosporidium Oocysts In Fecal Smears, Henry H. Stibbs, Jerry E. Ongerth
Immunofluorescence Detection Of Cryptosporidium Oocysts In Fecal Smears, Henry H. Stibbs, Jerry E. Ongerth
Faculty of Engineering and Information Sciences - Papers: Part A
An indirect fluorescent antibody (IFA) procedure was developed for the detection of Cryptosporidium sp. oocysts in human, nonhuman primate, and bovine fecal smears. The procedure, which takes about 90 min to perform, involves the use of a rabbit antiserum against Cryptosporidium oocysts isolated from dairy cattle. Cross-specificity testing of the IFA method revealed no reactivity with yeasts, various amoebae, Giardia lamblia, Chilomastix sp., or Blastocystis sp. and only very weak cross-reactivity with coccidian oocysts of other genera. IFA detection of oocysts in human and nonhuman primate fecal smears was far more sensitive than was dimethyl sulfoxide-carbolfuchsin staining. Moreover, IFA detection …