Science and Technology Studies Commons^™

Specifying Interdatabase Dependencies In A Multidatabase Environment, Marek Rusinkiewicz, Amit P. Sheth, George Karabatis

Kno.e.sis Publications

The problem of interdatabase dependencies and the effect they have on applications updating interdependent data are addressed. A model that allows specifications of constraints among multiple databases in a declarative fashion is proposed. The separation of the constraints from the application programs facilitates the maintenance of data constraints and allows flexibility in their implementation. It allows investigation of various mechanisms for enforcing the constraints, independently of the application programs. By grouping the constraints together, it is possible to check their completeness and discover possible contradictions among them. The concepts of polytransactions, which use interdatabase dependencies to generate a series of …

On The Relationship Between Parsimonious Covering And Boolean Minimization, Venu Dasigi, Krishnaprasad Thirunarayan

Kno.e.sis Publications

Minimization of Boolean switching functions is a basic problem in the design of logic circuits. The designer first comes up with a switching function expressed in terms of several binary input variables that satisfies the desired functionality, and then attempts to minimize the function as a sum of products or product of sums. It turns out that a sum of products form of a switching function that has no redundancy is a union of prime implicants of the function.

In this paper we would like to explicate some of the relationships of the boolean minimization problem to a formalization of …

On Serializability Of Multidatabase Transactions Through Forced Local Conflict, Dimitrios Georgakopoulos, Marek Rusinkiewicz, Amit P. Sheth

Kno.e.sis Publications

The main difficulty in enforcing global serializability in a multidatabase environment lies in resolving indirect transitive conflicts between multidatabase transactions. Indirect conflicts introduced by local transactions are difficult to resolve because the behavior or even the existence of local transactions is not known to the multidatabase system. To overcome these problems, we propose to incorporate additional data manipulation operations in the subtransactions of each multidatabase transaction. We show that if these operations create direct conflicts between subtransactions at each participating local database system, indirect conflicts can be resolved even if the multidatabase system is not aware of their existence. Based …

The Architecture Of Braid: A System For Bridging Al/Db Systems, Amit P. Sheth, Anthony B. O'Hare

Kno.e.sis Publications

We describe the design of BrAID (a Bridge between Artificial Intelligence and Database Management Systems), an experimental system for the efficient integration of logic based Artificial Intelligence (Al) and database (DB) technologies. Features provided by BrAID include (a) access to conventional DBMSs, (b) support for multiple inferencing strategies, (c) a powerful caching subsystem that manages views and employs subsumption to facilitate the reuse of previously cached data, (d) lazy or eager evaluation of queries submitted by the AI system, and (e) the generation of advice by the AI system to aid in cache management and query execution planning. To discuss …

Front Matter

BEADS: Journal of the Society of Bead Researchers

No abstract provided.

French Beadmaking: An Historic Perspective Emphasizing The 19th And 20th Centuries, Marie-José Opper, Howard Opper

BEADS: Journal of the Society of Bead Researchers

Beadmaking in France began in pre-Roman times. It reached its zenith in the 19th and 20th centuries when beads of sundry materials and styles were produced in both artisanal workshops and large factories to decorate a multitude of items and to serve as components of fashion jewelry. This article discusses the different beadmakers and their varied products.

Captions And Color Plates (V.3, 1991)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.

L'Impiraressa: The Venetian Bead Stringer, Irene Ninni

BEADS: Journal of the Society of Bead Researchers

In 1893, Irene Ninni published a succinct account of a large but little-known group of Venetian women called impiraressa or bead stringers whose task it was to thread the glass beads produced on Murano and form them into hanks for the world market. The original Italian text is provided, along with an English translation. Two late 19th-century paintings by John Singer Sargent provide a rare glimpse of the bead stringers at work.

Book Reviews And End Matter

BEADS: Journal of the Society of Bead Researchers

Carey: Beads and Beadwork of West and Central Africa reviewed by Marie-José Opper and Howard Opper

Bennyhoff and Hughes: Shell Bead and Ornament Exchange Networks Between California and the Western Great Basin reviewed by Leslie L. Hartzell

Fogelman: Glass Trade Beads in the Northeast, and Including Aboriginal Bead Industries reviewed by James W. Bradley

Picard and Picard: Beads from the West African Trade Series — Volumes V and VI reviewed by Peter Francis, Jr.

Jargstorf: Glass in Jewelry: Hidden Artistry in Glass reviewed by Margret Carey

The Mohawk Glass Trade Bead Chronology: Ca. 1560-1785, Donald A. Rumrill

BEADS: Journal of the Society of Bead Researchers

Early glass beads acquired by the Mohawk Indians of New York state were a mixture of whatever was made available to them by European traders. By the second quarter of the 17th century, the beads reflected a dominance of particular types and/or colors as villages were relocated. This phenomenon appears to have ritualistic connotations and suggests that the bead-selection process was a part of the ceremonialism practiced in the daily, seasonal and annual life modes of the Mohawk. Ten distinct periods have been identified based on an examination of approximately 10,000 glass beads recovered from 33 Mohawk village sites. Other …

Beads: Journal Of The Society Of Bead Researchers - Volume 3 (Complete)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.

Table Of Contents (V.3, 1991)

BEADS: Journal of the Society of Bead Researchers

No abstract provided.

The Beads From Oudespost I, A Dutch East India Company Outpost, Cape, South Africa, Karlis Karklins, Carmel Schrire

BEADS: Journal of the Society of Bead Researchers

The site of a provisioning station operated by the Dutch East India Company near the Cape of Good Hope during the late 17th and early 18th centuries produced a variety of European beads of several materials. A "typical" Dutch bead assemblage of the period, it is significant because it comes from one of very few independently dated bead-producing sites in southern Africa and, as such, will be instrumental in the formulation of a chronology for the beads found in this part of Africa.

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 …

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.

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 …

Information Technology And Wealth: Cybernetics, History And Economics, Elin Whitney-Smith

Engineering Management & Systems Engineering Theses & Dissertations

Capitalism developed where and when it did because there was high information access. There was high information access because of a major advance in information technology--the press. Where the technology was not controlled by the "powers that be" there was economic growth and a shift in the entire social structure. Where it was controlled there was no structural change and there was economic ruin. The development of capitalism is a major step change in economic growth. It is also a major change in the way people organize themselves into groups.

Major step changes in the growth and in the organization …