Results 161 to 170 of about 5,597,551 (397)
Multi‐institutional study on image quality for a novel CBCT solution on O‐ring linac
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Introduction This work presents a multi‐institutional study on image quality provided by a novel cone beam computed tomography (CBCT). The main goal is to investigate the consistency of imaging performance across multiple institutions.
Luis Agulles‐Pedrós +11 more
wiley +1 more source
Papeles de Europa, 2009 This essay examines the questions raised by the present financial crisis through an enquiry into the institutional foundations of American finance. We view with some skepticism strong claims concerning the disastrous outcome for the structural dynamism ...
Martijn Konings, Leo Panitch
doaj
A simple characterization of tightness for convex solid sets of positive random variables [PDF]
arXiv, 2017 We show that for a convex solid set of positive random variables to be tight, or equivalently bounded in probability, it is necessary and sufficient that it is radially bounded, i.e. that every ray passing through one of its elements eventually leaves the set. The result is motivated by problems arising in mathematical finance.
arxiv
Getting connected : competition and diffusion in African mobile telecommunications markets [PDF]
The author studies the determinants of the diffusion of mobile telecommunications in Africa in a fixed effects model. He uses data from 1987-2000 on 41 African countries that have adopted cellular telecommunications technologies.
Gebreab, Frew Amare
core
Evaluation of the effect of metal stents on dose perturbation in the carbon beam irradiation field
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Propose Carbon ion therapy is indicated for cases in which stents have been inserted, such as bile ducts, but the effect of metal stents on carbon ion therapy is unclear. In this study, the dose perturbation of carbon ion therapy caused by metallic bile duct stents was evaluated by dosimetry. Materials and methods Five different types of metal
Yuya Miyasaka +8 more
wiley +1 more source
Positivity of mild solution to stochastic evolution equations with an application to forward rates [PDF]
arXiv, 2019 We prove a maximum principle for mild solutions to stochastic evolution equations with (locally) Lipschitz coefficients and Wiener noise on weighted $L^2$ spaces. As an application, we provide sufficient conditions for the positivity of forward rates in the Heath-Jarrow-Morton model, considering the associated Musiela SPDE on a homogeneous weighted ...
arxiv
Biases of professional exchange rate forecasts: Psychological explanations and an experimentally based comparison to novices [PDF]
The empirical performance of macroeconomic exchange rate models is more than disappointing. This dismal result is also reflected in the forecasting capabilities of professional analysts: all in all, analysts are not in a position to beat naïve random ...
Bofinger, Peter +2 more
core
Policy Issues in Maine School Finance Reform [PDF]
, 1993 Jean Lavigne and Patricia Hofmaster assess Maine’s position relative to school finance reform and offer some suggestions for future ...
Hofmaster, Patricia, Lavigne, Jean E.
core +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose The dual‐layer multileaf collimator (MLC) in Halcyon adds complexities to the dose calculation process owing to the variability of dosimetric characteristics with leaf motion. Recently, an enhanced leaf model (ELM) was developed to refine the MLC model in the Eclipse treatment planning system. This study investigates the performance of
Ryohei Miyasaka +6 more
wiley +1 more source
AxiomsThis paper explores the implications of modifying the canonical Heisenberg commutation relations over two simple systems, such as the free particle and the tunnel effect generated by a step-like potential.
Mauricio Contreras González +2 more
doaj +1 more source