Accurate modeling of the respiratory cycle is important to account for the effect of organ motion on dose calculation for lung cancer patients. The aim of this study is to evaluate the accuracy of a respiratory model for lung cancer patients. Lujan et al. [Med. Phys. 26(5), 715-720 (1999)] proposed a model, which became widely used, to describe organ motion due to respiration. This model assume...

A class of complete potential-density basis sets in cylindrical (R,φ, z) coordinates is presented. This class is suitable for stability studies of galactic disks in three dimensions and includes basis sets tailored for disks with vertical density profiles that are exponential (e−|z|/z0), Gaussian (e−(z/z0) 2 ) or locally isothermal ( sech(z/z0) ). The basis sets are non-discrete and non-biortho...

We consider the set Z0 of non-negative integers endowed with a distance d defined as follows: given x, y ∈ Z0 , d(x, y) is, in binary notation, the result of performing, digit by digit, the “exlusive or” (in short, “XOR”) operation on (the binary notations of) x and y. Dawson, in [?], considers this geometry and suggests the following construction: given k different integers x1, . . . , xk ∈ Z0...

In this paper, we examine the questions of which coalition structure is formed and how payoãis distributed among players in cooperative games with externalities. We introduce a sequential stability concept called a sequentially stable payoãconåguration in a game with a coalition structure by extending the concept of the equilibrium binding agreements by Ray and Vohra (1997). Ray and Vohra captu...

and Applied Analysis 3 capacity of the prey population x t is b/a, so it is meaningful that the economical threshold h is less than b/a. Thus, throughout this paper, we set up the following two assumptions: A1 D e < a b , A2 h ≤ b a . 2.1 From the biological point of view, it is reasonable that system 1.1 is considered to control the prey population in the biological meaning space { x, y : x ≥ ...

We study various dynamical properties (winding angles, areas) of a set of harmonically bound Brownian particles (monomers), one endpoint of this chain being kept fixed at the origin 0. In particular, we show that, for long times t, the areas {Ai} enclosed by the monomers scale like t1/2, with correlated gaussian distributions. This is at variance with the winding angles {θi} around fixed points...

We give a constructive characterization for the capacity of wireless broadcast networks that are prone to Byzantine attacks. The adversary controls a single node in the network and can modify the packets flowing through the node. The central trade-off in such a scenario is that of security and throughput. We define secure capacity as the highest possible transmission rate from the source such t...