Purpose: A simple method for verifying the dose point kernel of Ir-192 source used in HDR brachytherapy using Kodak EDR2 film in a spiralphantom. Method and Materials: A spiral solid water phantom availablefrom Gammex International for IMRT QA was modified for this study. A CT scan image of the phantom was acquired with a 10 x 12 inch filmloaded in the spiral groove. A 3.5 mm long 8...

While both Campylobacter coli and C. jejuni are frequent causes of human campylobacteriosis, a common conclusion of health care professionals and researchers alike is that C. jejuni is the more pathogenic or virulent species. C. jejuni has been shown to be superior in enterotoxin production, suggesting that C. jejuni is more enterotoxigenic, and as such, potentially more virulent than C. coli. ...

By considering an essential subset of the BPEL orchestration language, we define SeB, a session based style of this subset. We discuss the formal semantics of SeB and we present its main properties. We use a new approach to address the formal semantics, based on a translation into so-called control graphs. Our semantics handles control links and addresses the static semantics that prescribes th...

In this work, we incorporate reversibility into structured communication-based programming, to allow parties of a session to automatically undo, in a rollback fashion, the effect of previously executed interactions. This permits taking different computation paths along the same session, as well as reverting the whole session and starting a new one. Our aim is to define a theoretical basis for e...

WITH HALF THE world’s population lacking adequate sanitation, WHO’s goal of health for all by 2000 is unlikely to be achieved. A major difficulty, as in much other development, is shortage of funds. A postal survey conducted by WEDC in 1992 showed quite clearly that the most common reason for people not having latrines is that they cannot afford the cost of the types of sanitation being advocat...