PURPOSE To investigate the association between dose to various anatomical structures and dysphagia among patients with head and neck cancer treated by definitive intensity-modulated radiotherapy (IMRT) and concurrent chemotherapy. METHODS AND MATERIALS Thirty-nine patients with squamous cancer of the head and neck were treated by definitive concurrent chemotherapy and IMRT to a median dose of...

Criterion for contacting is critically important for the Generalized Interpolation Material Point(GIMP) method. We present an improved criterion by adding a switching function. With the method dynamical response of high melting explosive(HMX) with cavities under shock is investigated. The physical model used in the present work is an elastic-to-plastic and thermal-dynamical model with Mie-Grüne...

Over the past decade, the kinetic-data-structures framework has become the standard in computational geometry for dealing with moving objects. A fundamental assumption underlying the framework is that the motions of the objects are known in advance. This assumption severely limits the applicability of KDSs. We study KDSs in the black-box model, which is a hybrid of the KDS model and the traditi...

We compared maximum displacement thresholds (Dmax) with minimum displacement thresholds (Dmin) in patients with retinitis pigmentosa (RP) in order to characterize the nature of their visual disability, as well as to assess possible models of foveal vision loss. Thresholds for discriminating the direction of the spatial displacement of random dot patterns were measured in a group of 20 patients ...

BACKGROUND The purpose of this study was to evaluate the distribution of the intensity-modulated radiotherapy (IMRT) dose delivered to the teeth, maxilla, and mandible. METHODS The mean dose (Dmean) and maximum dose (Dmax) of radiation for the maxilla, mandible, and teeth of 63 patients with oropharyngeal (n = 44) or nasopharyngeal (n = 19) tumors were retrospectively evaluated. RESULTS The...

Network data is ubiquitous and growing, yet we lack realistic generative network models that can be calibrated to match real-world data. The recently proposed Block Two-Level Erdős-Rényi (BTER) model can be tuned to capture two fundamental properties: degree distribution and clustering coefficients. The latter is particularly important for reproducing graphs with community structure, such as so...

In this paper we study the set cover games when the elements are selfish agents. In this case, each element has a privately known valuation of receiving the service from the sets, i.e., being covered by some set. Each set is assumed to have a fixed cost. We develop several approximately efficient strategyproof mechanisms, each of which decides, after soliciting the declared bids by all elements...

The secondary electron yield (SEY) of two different non-evaporable getter (NEG) samples has been measured `as received' and after thermal treatment. The investigated NEGs are TiZr and TiZrV thin ®lm coatings of 1 mm thickness, which are sputter deposited onto copper substrates. The maximum SEY dmax of the air exposed TiZr and TiZrV coating decreases from above 2.0 to below 1.1 during a 2 h heat...

The best known examples of Vassiliev invariants are the coefficients of a Jones-type polynomial expanded after exponential substitution. We show that for a given knot, the first N Vassiliev invariants in this family determine the rest for some integer N . Supported in part by NSF Grant No. DMS-9504471 Supported in part by NSF Grant #23068 2 Kauffman, L. H. et. al. In this paper we prove a finit...

We propose two efficient and general MCMC algorithms to compute optimal Bayesian decisions for Mallows’ model and Condorcet’s model w.r.t. any loss function and prior. We show that the mixing time of our Markov chain for Mallows’ model is polynomial in φ−kmax , dmax, and the input size, where φ is the dispersion of the model, kmax measures agents’ largest total bias in bipartitions of alternati...