INTRODUCTION High rectal doses are associated with increased toxicity. A rectal displacement device (RDD) reduces rectal dose in prostate stereotactic body radiation therapy (SBRT). This study investigates any dosimetric difference between two methods of rectal displacement (Rectafix and SpaceOAR) for prostate SBRT. METHODS Rectal dosimetry of 45 men who received SBRT within the PROMETHEUS tr...

The absolute configuration of the title compound, C(20)H(23)NO(2), has been confirmed as 4S. The benzyl residue and H atom at the asymmetric C-atom centre occupy pseudo-axial and bis-ectional positions, respectively. The oxazolidine ring adopts an envelope conformation. In the crystal structure, the mol-ecular packing is stabilized by non-classical C-H⋯O hydrogen bonds.

Application of absolute principal component analysis to size distribution data: identification of particle origins T. W. Chan and M. Mozurkewich Department of Chemistry and Centre for Atmospheric Chemistry, York University, Toronto, Ontario, Canada now at: Environment Canada, Toronto, Ontario, Canada Received: 15 August 2006 – Accepted: 26 September 2006 – Published: 18 October 2006 Corresponde...

Simplified representation of atmospheric aerosol size distributions using absolute principal component analysis T. W. Chan and M. Mozurkewich Department of Chemistry and Centre for Atmospheric Chemistry, York University, Toronto, Ontario, Canada now at: Environment Canada, Toronto, Ontario, Canada Received: 15 August 2006 – Accepted: 2 October 2006 – Published: 18 October 2006 Correspondence to...

The Chebyshev or L∞ estimator minimizes the maximum absolute residual and is useful in situations where the error distribution has bounded support. In this paper, we derive the asymptotic distribution of this estimator in cases where the error distribution has bounded and unbounded support. We also consider the asymptotics of set-membership estimators such as the Chebyshev centre and maximum in...

In this paper we consider the absolute variation statistics of a composition σ = σ1 · · ·σm of n which is a measure of the sum of absolute differences between each consecutive pair of parts in a composition. This and some related statistics which we discuss, can also be interpreted within the context of bargraph polygons and bargraph walks of area n. In this context, absolute variation correspo...

background: poison control centre of morocco (mpcc) plays a key role in promoting health. this study was aimed to demonstrate the role of the mpcc in improving public health and poisoning management. methods: this was a retrospective study of poisoning cases reported to the mpcc between 1980 and 2011. the collected data included number of poisoning cases, profession of interlocutor who called t...

background: poisoning incidents, in both children and adolescents, are known to occur in new zealand but little is known about the agents implicated.   methods: all the calls received over the ten years between 2000 and 2009, by the national poison centre in new zealand, were retrospectively reviewed. calls related to cases involving those less than 19 years were included. the data were analyze...