Results 141 to 150 of about 1,574,976 (319)
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Single‐isocenter multitarget (SIMT) radiosurgery has become increasingly popular as advancement in planning and delivery systems have made this approach clinically viable. With targets varying in size and distance from isocenter, SIMT plans are highly complex with dynamic multileaf collimator (MLC) motion.
Hem Moktan +3 more
wiley +1 more source
Spacetime colour reconnection in Herwig 7
European Physical Journal C: Particles and Fields, 2019 We present a model for generating spacetime coordinates in the Monte Carlo event generator Herwig 7, and perform colour reconnection by minimizing a boost-invariant distance measure of the system.
Johannes Bellm +4 more
doaj +1 more source
A new degree bound for local unitary and $n$-qubit SLOCC Invariants [PDF]
arXiv, 2017 Deep connections between invariant theory and entanglement have been known for some time and been the object of intense study. This includes the study of local unitary equivalence of density operators as well as entanglement that can be observed in stochastic local operations assisted by classical communication (SLOCC).
arxiv
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose The dual‐layer multileaf collimator (MLC) in Halcyon adds complexities to the dose calculation process owing to the variability of dosimetric characteristics with leaf motion. Recently, an enhanced leaf model (ELM) was developed to refine the MLC model in the Eclipse treatment planning system. This study investigates the performance of
Ryohei Miyasaka +6 more
wiley +1 more source
Monte Carlo modeling of radiation dose from radiation therapy with superficial x‐rays
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Reham Barghash +3 more
wiley +1 more source
Discrete physics with conservation and Galilean invariance
Mathematical and Computer Modelling, 2003 In this paper, we show how to avoid continuum concepts altogether for both Newtonian mechanics and for special relativistic mechanics. For Newtonian mechanics, we will establish all the usual conservation laws. For both Newtonian mechanics and for special relativistic mechanics, we will prove Galilean invariance for inertial systems.
openaire +2 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Due to the tight curvature in their design, ring applicators are usually associated with large positioning errors. The standard practice to correct for these deviations based on global offsets may not be sufficient to comply with the recommended tolerance.
Leon G. Aldrovandi +3 more
wiley +1 more source
Nuclear Physics B, 2021 We explore the phenomenology of the Georgi-Machacek model extended with two Higgs doublets and vector fermion doublets invariant under SU(2)L×U(1)Y×Z4×Z2.
Shao-Long Chen +2 more
doaj
Self-Similarities and Invariant Densities for Model Sets
, 1997 Model sets (also called cut and project sets) are generalizations of lattices. Here we show how the self-similarities of model sets are a natural replacement for the group of translations of a lattice.
Baake, Michael, Moody, Robert V.
core +1 more source