Results 71 to 80 of about 3,717,916 (329)

From 2D to 3D gamma passing rate tolerance and action limits for patient‐specific quality assurance in volumetric‐modulated arc therapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background Volumetric modulated arc therapy (VMAT) requires an accurate patient‐specific quality assurance (PSQA) program. In clinical practice, this is usually performed using the γ‐index and the two‐dimensional gamma passing rate (2D %GP). A three‐dimensional (3D) index incorporating the patient anatomy could be more useful for the 3D dose ...
Christos Zarros, George Patatoukas, Nikos Kollaros, Marina Chalkia, Andromachi Kougioumtzopoulou, Vasilios Kouloulias, Kalliopi Platoni   +6 more
wiley   +1 more source

Approach to solve multi-criteria group decision-making problems by exponential operational law in generalised spherical fuzzy environment

CAAI Transactions on Intelligence Technology, 2020
The construction of generalised spherical fuzzy number (GSFN) is a reliable philosophy to design and understanding of vagueness and impreciseness. In this study, at first, the authors have defined the generalised spherical fuzzy set and discussed its ...
Tipu Sultan Haque, Avishek Chakraborty, Sankar Prasad Mondal, Shariful Alam   +3 more
doaj   +1 more source

The principle of local reflexivity for operator ideals and its implications [PDF]

arXiv, 2001
We present a survey of past research activities and current results in constructing a mathematical framework describing the principle of local reflexivity for operator ideals and reveal further applications involving operator ideal products consisting of operators which factor through a Hilbert space.
arxiv  

Modelling of a double‐scattering proton therapy nozzle using the FLUKA Monte Carlo code and analysis of linear energy transfer in patients treated for prostate cancer

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background The dose‐averaged linear energy transfer (LETD) in proton therapy (PT) has in pre‐clinical studies been linked to the relative biological effectiveness (RBE) of protons. Until recently, the most common PT delivery method in prostate cancer has been double‐scattered PT, with LETD only available through dedicated Monte Carlo (MC ...
Rasmus Klitgaard, Lars Fredrik Fjæra, Camilla Hanquist Stokkevåg, Perry Johnson, Mark Artz, Nancy Price Mendenhall, Curtis Bryant, Ludvig Paul Muren   +7 more
wiley   +1 more source

La Nova Scientia: Rewriting the History of Operational Research [PDF]

arXiv, 2017
The accepted lore is that Operational Research traces its roots back to the First and Second World Wars, when scientific research was used to improve military operations. In this essay we provide a different perspective on the origins of Operational Research by arguing that these are deeply intertwined with the impressive technological advances in ...
arxiv  

Evaluation of the effect of metal stents on dose perturbation in the carbon beam irradiation field

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Propose Carbon ion therapy is indicated for cases in which stents have been inserted, such as bile ducts, but the effect of metal stents on carbon ion therapy is unclear. In this study, the dose perturbation of carbon ion therapy caused by metallic bile duct stents was evaluated by dosimetry. Materials and methods Five different types of metal
Yuya Miyasaka, Tetsuya Ishizawa, Yoshihito Nawa, Hikaru Souda, Shohei Kawashiro, Hongbo Chai, Miyu Ishizawa, Hiraku Sato, Takeo Iwai   +8 more
wiley   +1 more source

State Complexity of Catenation Combined with Star and Reversal [PDF]

, 2010
This paper is a continuation of our research work on state complexity of combined operations. Motivated by applications, we study the state complexities of two particular combined operations: catenation combined with star and catenation combined with ...
Bo Cui, Giovanni Pighizzini, Ian McQuillan, Lila Kari, Sheng Yu, Yuan Gao   +5 more
core   +3 more sources

A comparative study of the capability of alternative mixed integer programming formulations

Technological and Economic Development of Economy, 2018
In selecting the best mixed integer linear programming (MILP) formulation the important issue is to figure out how to evaluate the performance of each candidate formulation in terms of selected criteria.
Baris Kececi, Tusan Derya, Esra Dinler, Yusuf Tansel Ic   +3 more
doaj   +1 more source

Modeling and simulation for supply chain finance under uncertain environment

Technological and Economic Development of Economy, 2020
This paper studies the role of factoring in a bilateral supply chain, where both the supplier and retailer are financially constrained. Applying the stylized Stackelberg game, we analytically present that the supplier’s capital shortage limits the ...
Wei Jin, Chengfu Wang
doaj   +1 more source

Spectral Bounds for Polydiagonal Jacobi Matrix Operators [PDF]

arXiv, 2013
The research on spectral inequalities for discrete Schrodinger Operators has proved fruitful in the last decade. Indeed, several authors analysed the operator's canonical relation to a tridiagonal Jacobi matrix operator. In this paper, we consider a generalisation of this relation with regards to connecting higher order Schrodinger-type operators ...
arxiv