Results 111 to 120 of about 2,503,918 (387)
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Skin flash is typically added to breast and chestwall plans to ensure robust target coverage in the presence of respiratory motion, anatomic changes, and small setup uncertainties. Adding skin flash in volumetric modulated arc therapy (VMAT) plans is an iterative and manual process.
Emily Hubley +6 more
wiley +1 more source
Novel Symmetries in Christ-Lee Model [PDF]
Europhys. Lett. 115 (2016) 21003, 2015 We demonstrate that the gauge-fixed Lagrangian of the Christ-Lee model respects four fermionic symmetries, namely; (anti-)BRST symmetries, (anti-)co-BRST symmetries within the framework of BRST formalism. The appropriate anticommutators amongst the fermionic symmetries lead to a unique bosonic symmetry.
arxiv +1 more source
Loops in SU(2), Riemann Surfaces, and Factorization, I [PDF]
, 2016 . In previous work we showed that a loop g : S 1 → SU(2) has a triangular factorization if and only if the loop g has a root subgroup factorization. In this paper we present generalizations in which the unit disk and its double, the sphere, are replaced ...
Geometry, Integrability Symmetry
core
Casimir repulsion between metallic objects in vacuum
, 2010 We give an example of a geometry in which two metallic objects in vacuum experience a repulsive Casimir force. The geometry consists of an elongated metal particle centered above a metal plate with a hole.
Johnson, Steven G. +4 more
core +1 more source
Geometry of Invariant Tori of Certain Integrable Systems with Symmetry and an Application to a Nonholonomic System [PDF]
, 2007 Bifibrations, in symplectic geometry called also dual pairs, play a relevant role in the theory of superintegrable Hamiltonian systems. We prove the existence of an analogous bifibrated geometry in dynamical systems with a symmetry group such that the ...
Fassò, Francesco, Giacobbe, Andrea
core +4 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study quantitatively evaluates bladder changes and their dosimetric impact during the on‐couch adaptive process on a commercial CBCT‐based online adaptive radiotherapy (CT‐gART) platform. Methods Data from 183 fractions of ten patients receiving online ART for pelvic cancers were analyzed retrospectively.
Ingrid Valencia Lozano +7 more
wiley +1 more source
Zamolodchikov Tetrahedral Equation and Higher Hamiltonians of 2d Quantum Integrable Systems [PDF]
, 2017 . The main aim of this work is to develop a method of constructing higher Hamiltonians of quantum integrable systems associated with the solution of the Zamolodchikov tetrahedral equation. As opposed to the result of V.V. Bazhanov and S.M.
Geometry, Integrability Symmetry
core
Novel discrete symmetries in the general N = 2 supersymmetric quantum mechanical model
, 2013 In addition to the usual supersymmetric (SUSY) continuous symmetry transformations for the general N = 2 SUSY quantum mechanical model, we show the existence of a set of novel discrete symmetry transformations for the Lagrangian of the above SUSY quantum
Kumar, R., Malik, R. P.
core +1 more source
Non-perturbative Gauge Groups and Local Mirror Symmetry [PDF]
, 2001 We analyze D-brane states and their central charges on the resolution of C^2/Z_n by using local mirror symmetry. There is a point in the moduli space where all n(n-1)/2 branches of the principal component of the discriminant locus coincide. We argue that
Skarke, H.
core +2 more sources
Development of a generic focal spot measurement method suitable for bore‐type linacs
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose In linear accelerators, deviations in the x‐ray focal spot position significantly affect the accuracy of radiation therapy. However, as the focal spot position in bore‐type linac systems such as the Radixact system, cannot be assessed using conventional methods, a new evaluation method is required.
Hidetoshi Shimizu +5 more
wiley +1 more source