## Search

Now showing items 11-20 of 33

#### Application of a spring-dashpot system to clinical lung tumor motion data

(AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS, 2013)

Purpose: The treatment efficacy of radiation therapy for lung tumors can be increased by compensating for breath-induced tumor motion. In this study, we quantitatively examine a mathematical model of pseudomechanical ...

#### Asymptotic enumeration of symmetric integer matrices with uniform row sums

(CAMBRIDGE UNIV PRESS, 2013)

We investigate the number of symmetric matrices of nonnegative integers with zero diagonal such that each row sum is the same. Equivalently, these are zero-diagonal symmetric contingency tables with uniform margins, or ...

#### Maps between curves and arithmetic obstructions

(2017)

Let X and Y be curves over a finite field. In this article we explore methods
to determine whether there is a rational map from Y to X by considering
L-functions of certain covers of X and Y and propose a specific family ...

#### On kleinewillingh¨ofer types of finite laguerre planes with respect to homotheties

(2016)

© 2016, University of Queensland. All rights reserved. Kleinewillinghöfer classified Laguerre planes with respect to central automorphisms and obtained a multitude of types. In this paper we investigate the Kleinewillinghöfer ...

#### Optimization of a survey using spatially balanced sampling: a single-year application of clam monitoring in the Arcachon Bay (SW France)

(2017)

Bivalves are important components of benthic marine and freshwater ecosystems throughout
the world. One of the most exploited bivalves used for human consumption is manila clam (Venerupis
philippinarum). In Arcachon Bay ...

#### Minimum triplet covers of binary phylogenetic X-trees

(2017)

© 2017, The Author(s). Trees with labelled leaves and with all other vertices of degree three play an important role in systematic biology and other areas of classification. A classical combinatorial result ensures that ...

#### A mathematical model of the metabolic and perfusion effects on cortical spreading depression

(PUBLIC LIBRARY SCIENCE, 2013)

Cortical spreading depression (CSD) is a slow-moving ionic and metabolic disturbance that propagates in cortical brain tissue. In addition to massive cellular depolarizations, CSD also involves significant changes in ...

#### Relative Brauer groups of torsors of period two

(2016)

We consider the problem of computing the relative Brauer group of a torsor of
period two under an elliptic curve. We show how this problem can be reduced to finding a
set of generators for the group of rational points ...

#### Degree and the Brauer-Manin obstruction

(2017)

Let X be a smooth variety over a number field k embedded as a degree d
subvariety of {P}^nk and suppose that X is a counterexample to the
Hasse principle explained by the Brauer-Manin obstruction. We consider the
question ...

#### Lagrangian theory of structure formation in relativistic cosmology. V. Irrotational fluids

(2018)

We extend the general relativistic Lagrangian perturbation theory, recently developed for the
formation of cosmic structures in a dust continuum, to the case of model universes containing a single
fluid with a single–valued ...