Results 101 to 110 of about 2,165,172 (354)
On Type II Strings in Two Dimensions
, 2005 We consider type IIA/B strings in two-dimensions and their projection with respect to the nilpotent space-time supercharge. Based on the ground ring structure, we propose a duality between perturbed type II strings and the topological B-model on deformed
A.M. Uranga +20 more
core +2 more sources
Two Points of the Boundary of Toric Geometry [PDF]
, 2018 This note presents two observations which have in common that they lie at the boundary of toric geometry. The first one because it concerns the deformation of affine toric varieties into non toric germs in order to understand how to avoid some ramification problems arising in the study of local uniformization in positive characteristic, and the second ...
openaire +4 more sources
True coincidence summing correction factor for point source geometry with PHITS
Nuclear Engineering and Technology, 2023 In this study, it has been shown that the true coincidence summing correction factor can be obtained for the first time using the PHITS Monte Carlo program.
Esra Uyar
doaj
Journal of Applied Clinical Medical Physics, EarlyView.ABSTRACT Background In radiotherapy for early‐stage glottic cancer, evaluating the target surface dose at the glottic air–tissue boundary is crucial, as buildup effect can cause underdosing. The accuracy of dose evaluation in the surrounding tissues is affected by both the dose calculation algorithms and the accuracy of the Hounsfield unit values in ...
Yuki Saito +3 more
wiley +1 more source
Universal Hyperbolic Geometry I: Trigonometry [PDF]
arXiv, 2009 Hyperbolic geometry is developed in a purely algebraic fashion from first principles, without a prior development of differential geometry. The natural connection with the geometry of Lorentz, Einstein and Minkowski comes from a projective point of view, with trigonometric laws that extend to `points at infinity', here called `null points', and beyond ...
arxiv
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Training deep learning dose prediction models for the latest cutting‐edge radiotherapy techniques, such as AI‐based nodal radiotherapy (AINRT) and Daily Adaptive AI‐based nodal radiotherapy (DA‐AINRT), is challenging due to limited data.
Hui‐Ju Wang +5 more
wiley +1 more source
Effects of Temporal Sampling Interval on the Moon-Based Earth Observation Geometry
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020 The effects of temporal sampling interval on the moon-based earth observation geometry are analyzed in this study based on three observation angles, namely viewing zenith angle, solar zenith angle, and relative azimuth angle. According to the definitions
Hanlin Ye +3 more
doaj +1 more source
A fixed point formula for loop group actions [PDF]
arXiv, 2000 We express the index of the Dirac operator on symplectic quotients of a Hamiltonian loop group manifold with proper moment map in terms of fixed point data.
arxiv
Gradient estimate via two-point function under Ricci flow [PDF]
arXiv, 2020 We derive estimates relating the values of a solution at any two points to the distance between the points, for quasilinear parabolic equations on compact Riemannian manifolds under the Ricci flow.
arxiv
SOME VITAL POINTS IN THE TEACHING OF GEOMETRY [PDF]
School Science and Mathematics, 1908 n ...
openaire +3 more sources