No abstract

Existing search engines like Google, Yahoo!, Live etc. are not yet capable to answer queries that require deep semantic understanding of the query or the document. Instead, it is preferable to find and ask someone who has related expertise or experience on a topic and thus Web-based online communities have become important places for people to seek and share expertise. We need to gather the data that describes these online communities. But extracting, aggregating and analyzing data from these communities for finding experts on a single framework is a challenging task. Also there is no universal standard data structure for the outline of user participation in these communities. In this paper, we present a Grid-enabled framework of expertise search (GREFES) engine which utilizes online communities as sources for experts on various topics. This is a work in progress. We also propose an open data structure called SNML (Social Network Markup Language) to outline user participation in online communities. The architecture addresses major challenges in crawling of community data and query processing by utilizing Grid. An expert ranking algorithm is also discussed and evaluated.

Purpose: The goal of this research is to find the role of collagen membrane, which can reduce physical damage, as a scaffold for possible alternative to the corticotomy which causes Regional Acceleratory Phenomenon (RAP). Materials and Methods: The experiments were carried out on 12 New Zealand white rabbits, approximately 3.5 kg in bodyweight. We made an incision on the skin of the mandibular border and applied 37% phosphoric acid and collagen membrane to the mandibular bone surface of the first group (experimental group), and only phosphoric acid to the second group (control group). After 3 days, 1 week, and 2 weeks, 4 rabbits each were sacrificed and specimens were obtained. Each specimen was stained by H&E and Tartrate-resistant acid phosphatase (TRAP), and histological changes were observed by light microscope. Results: The demineralization of the experimental group was weak compared to the control group. It also showed a gradual increase of demineralization (after 3 days, 1 week, and 2 weeks) and the control group showed more extensive demineralization than the experimental group. Conclusion: This study demonstrates the amount of demineralization as a result of using phosphoric acid, and as time went by, demineralization increased. The absorbable collagen membrane was used as a scaffold to increase bone demineralization effect and prevent dispersion to adjacent tissues, but rather the amount of bone demineralization decreased. Therefore, the role of collagen membrane as a scaffold for RAP was weak.