Social and Behavioral Sciences 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 …

Similarities And Differences In The Adult Learner: A Comparison Of Student Perceptions Motivations And Needs By Age Cohort, Joan Elizabeth Patten

Masters Culminating Experiences (1993-2011)

The majority of literature dealing with the adult learner concept revolves around teaching methodologies or learning capabilities. While there is some literature on motivation in adult learners, the general assumption is that all those over the age of 25 are similarly motivated and share common perceptions.

To determine whether student perceptions, motivations and needs could be distinguished by age categories, survey results of 936 students at Sinclair Community College were categorized within 4 age cohorts. Results indicate that: 1) both traditionally-aged students as well as non-traditional students share some common perceptions; and 2) cohorts within the non-traditional student population may …

Promoting Export Activity In The Dayton Economy, Deena Lyn Will

Masters Culminating Experiences (1993-2011)

The development and implementation of a mail questionnaire proved to satisfy the goal of the Dayton Area Chamber of Commerce to promote export activity in the region. The results of the survey indicate that over one third of the respondents to the survey are actively engaged in exporting. The identification on these firms will allow the Chamber to more effectively promote their goods and services abroad.

The manipulation of the results obtained from the survey will be used to publish a listing of companies in the Dayton area engaged in exporting goods and services to foreign countries. The resultant export …

Automation Of The Directorate Of Research And Development Contracting At Wright-Patterson Air Force Base, Anthony W. Everidge

Masters Culminating Experiences (1993-2011)

This thesis examines the automation of the Directorate of Research and Development Contracting at Wright-Patterson Air Force Base. Background information on the Directorate is given along with the previous methods of producing contractual documents. The central problem of the thesis is to determine if the benefits of automating the Directorate outweigh the costs. A cost benefit analysis was used to make this determination. Each cost and each benefit is discussed in great detail along with the methodology used to measure each particular cost and benefit. The results of the study showed that the net present value of all benefits was …

U.S. Technology Transfer To China: Problems And Perspectives, Yalan Jiang

Masters Culminating Experiences (1993-2011)

The subject of technology transfer has been an area of wide-range interest and significance for many years, especially in the recent past, as Japan and the Newly Industrialized Nations (Hong Kong, Singapore, South Korea, and Taiwan) have set themselves as successful examples in area of technology transfer. Recognizing the importance of technology transfer to its national economic development, China started the unprecedented movement of technology transfer along with its economic reform in the late 1970s.

Great achievements have been made in the area of agriculture, industry, science and technology, and defense. However, many problems have emerged during the process of …

Enrollment Forecasting At Sinclair Community College, Scott David O'Bryant

Masters Culminating Experiences (1993-2011)

Sinclair Community College, like all institutions of higher education, has tremendous need for accurate enrollment forecasts. Until recently, using a combination of forecasting tools, the forecasts generated by the Office of Institutional Planning and Research (IPR) have been quite adequate. Recently, however, the accuracy of the enrollment predictions has waned considerably. In an effort to reverse this trend, it was decided to add another, previously untried, forecasting method to the IPR arsenal: Autoregressive Integrated Moving Averages, or ARIMA.

ARIMA models are a time series forecasting tool developed by Box and Jenkins in the late 1960s and early 1970s. After careful …