Ameloblastic fibro-odontoma (AFO) is a rare benign mixed odontogenic tumor that occurs predominantly in children and young adults with no gender predilection and anatomic site, usually appearing as a painless swelling. We present a case of an 11-year-old non-Caucasian boy complaining of large painless isolated swelling in the right mandibular body. Intraoral examination revealed a tumoral mass ...

A standard intuition underlying traditional accounts of belief change is the principle of minimal change. Briefly put, it states that an agent’s belief state should be modified minimally to incorporate new information. In this paper we introduce a novel account of belief change in which the agent’s belief state is modified minimally to incorporate exactly the new information. Thus a revision by...

We consider general 1-d systems of hyperbolic conservation laws. The goal is a better understanding of the structure (“geometry”) of such systems, and how it impacts solutions to Cauchy problems. Motivated by explicit examples of blow-up solutions, we embed the search for systems exhibiting similar phenomena into a larger scheme of identifying systems with prescribed geometric properties. For a...

Mach is a new operating system targeted for distributed and multiprocessor environments. Mach contains 4.3BSD compatibility code that, unlike the Mach kernel proper, runs only on a single processor, thus presenting a performance bottleneck to a multiprocessor system. Pieces of the 4.3BSD compatibility code were selectively parallelized to reduce this bottleneck. Signifrcantly improved multiproc...

Fournier's gangrene (FG) is a disease involving necrosis of perineum and external genitalia; in 95% of cases it is possible to diagnose the Fournier's gangrene just by physical examination. The clinical presentation of FG varies from an initial localized infection to large areas with necrotizing infection. The disease typically affect elderly men (6°-7° decade) with important systemic comorbidi...

introduction: prevention and control of cross infections for the personnel of dental offices and clinics are a critical issue in dental practice. in this study, a standardized questionnaire was developed to assess the knowledge, attitude and practice of the oral health-care workers in tehran university dental school regarding the blood-transmitted diseases and its validity and reliability were ...

For the past several decades, treatment for calcaneal fractures has been extensively reported on. Some agreement can be reached concerning extra-articular calcaneal fractures. The treatment of intra-articular calcaneal fractures, however, remains a subject of much debate. The literature concerning this topic is replete with controversy. There is disagreement among authors concerning the treatme...