PURPOSE To evaluate the prognostic factors associated with overall survival in patients with brain metastasis treated with whole brain radiotherapy (WBRT) and estimate the potential improvement in survival for patients with brain metastases, stratified by the Radiation Therapy Oncology Group (RTOG) recursive partitioning analysis (RPA) class. PATIENTS AND METHODS From January 1996 to December...

But beginning with his work in the late 1970s, Sosa takes a different approach to the debate between foundationalists and coherentists over the structure of knowledge. (Indeed, Sosa takes this different approach to a number of long-standing disputes in philosophy.) Rather than assuming the sides are talking past one another, Sosa suggests that each side has identi fi ed part of the truth, but m...

Who Starts a Business and Who is Self-Employed in Germany Based on representative data, the German Micro-Census, we provide an overview of the development of self-employment and entrepreneurship in Germany between 1991 and 2010, the first two decades after reunification. We investigate the socioeconomic background of these individuals, their education, previous employment status, and their inco...

In this paper, we investigate simple random walks in n-dimensional Euclidean Space. We begin by defining simple random walk; we give particular attention to the symmetric random walk on the d-dimensional integer lattice Zd. We proceed to consider returns to the origin, recurrence, the level-crossing phenomenon, and the Gambler’s Ruin.

Solvent fractionation of high oleic-high stearic (HOHS) sunflower oil was studied to determine the best solvent to use (hexane or acetone) in terms of the operational parameters and properties of the final stearins. Acetone fractionation on two types of HOHS sunflower oils (N17 and N20) was carried out at temperatures from 5 to 10 °C using micelles with different oil/solvent ratios. Acetone was...

Bidders in online multi-unit combinatorial auctions face the acute problem of estimating the valuations of an immense number of packages. Can the seller guide the bidders to avoid placing bids that are too high or too low? In the single unit case, fast methods are now available for incrementally computing, for each package at each time instant, the recommended lower bound (Deadness Level) and u...

the bioavailability of trace metals, their biological uptake and ecotoxiccological effect on soil biota can be better understood in terms of their chemical fractionation. the present study examined the mobility and availability of cd, cu, ni, pb and zn in sewage water – irrigated soils using sequential extraction technique as a basis for predicting metal uptake by plants. the residual fraction ...

background: increasing the complexity in modern radiotherapy techniques have increased the delivery time lowering consequently the treatment efficacy. through simulating the delivery time delay encountered in such techniques, its’ effect on two cancer cell lines and the compensating doses given to prevent such effect was investigated. materials and methods: f10b16 and 4t1 cancer cell lines were...