Friday, October 12, 2012 at 10AM

Case-based Approaches to Content Analysis in Cross-domain Information Sharing

Thomas Reichherzer, UWF

Information sharing plays a critical role in government and industry alike. While information sharing is desirable, it must be controlled to prevent leakage of sensitive content to unauthorized individuals and organizations. Reliable human review (RHR) is the preferred method to apply security policies to decide upon the release of information. Unfortunately, time-critical situations and the ever increasing volume of electronic documents make RHR no longer feasible. This talk describes methods that combine case-based reasoning (CBR) with natural language processing (NLP) techniques to learn security policies from marked up data in unstructured text documents. The learned policies can then be applied to unmarked text documents for classifying content according to the policies. The methods have been evaluated using data selected from the IMdb database

Friday, October 26, 2012 at 10AM

Where is the Semantics in the Semantic Web?

Patrick Hayes, IHMC

The Web is tied together by Universal Resource Identifiers, often called 'web addresses'. The standard story about Web architecture is that a URI "identifies" something which, when accessed, emits "representations": think of a website sending out HTML in response to a http GET request. The Semantic Web, however, uses URIs as logical names which refer to things. These two ideas about what URIs mean have an uneasy relationship, and debates about how best to explain this relationship have been long, often confused, often heated, and are still happening. These debates involve issues and ideas from network theory, Web architecture, formal logic and even the philosophy of language, fields which have never before needed to be related. Right now, the main Web architecture authority , the W3C TAG (Technical Architecture Group), has this matter on the agenda for its forthcoming meeting.

This talk will survey this rather tangled area, outline the main issues and ideas and summarize the various debate positions. (If the TAG has emitted a ruling by the time the talk is given, we will do our best to explain it.) Finally, we will outline a new proposal for extending RDF, the base notation of the Semantic Web, to provide for Web contexts to disambiguate URI meanings.

Friday, November 2, 2012 at 10AM

Properties of Liquid Crystals - Undergraduate Research

Chandra Prayaga, UWF

Research is an integral component of an undergraduate degree program. The Department of Physics, UWF, provides opportunities for research in fields of current interest, such as liquid crystals, nano-materials, and ultrafast laser design. Front-line research facilities are available for students to be trained. This seminar describes the research work done by our physics majors in the field of Liquid Crystals.

Liquid crystals are fundamentally and technologically important materials. We call them liquid crystals because they exhibit intermediate phases between the usual liquid and solid phases. The properties of the materials in these phases, and the changes in these properties as the liquid crystals change phases, are of great importance, and indeed, these materials behave in curious fashion under the application of external stimuli, such as electric and magnetic fields, stresses, laser light, etc. Several experimental results recently obtained by our students will be discussed in this talk.

Friday, November 30, 2012 at 2PM

High Energy Density Ultracapacitor

Ezzat Bakhoum, UWF

A new type of ultracapacitor that offers a capacitance density on the order of 500 Farads per cubic centimeter or higher has been created. The principle behind the new ultracapacitor structure is the insertion of a 100 nm-thick layer of barium strontium titanate as an interface between the activated carbon electrode and the electrolyte. The new ultracapacitors are highly needed in hybrid vehicle applications; as any significant increase in the energy storage capability of the ultracapacitors leads to substantial improvement in the fuel efficiency of hybrid vehicles.

Friday, December 7, 2012 at 10AM

Calculating Support, Confidence and Lift in Multi-relational XML data

Sikha Bagui, UWF

Multi-relational data, when converted to XML, give rise to repetitive data, distorting the interestingness measure calculations of association rules. In this talk I will show how three of the main interestingness measure calculations of association rules (support, confidence, and lift) have to be adjusted for multi-relational XML data.