Results 31 to 40 of about 55,127 (244)

The adjoint transport problem applied to estimate neutral particle leakage in the discrete ordinates formulations

Brazilian Journal of Radiation Sciences, 2022
In source–detector problems, neutron leakage is a quantity of interest that could lead to improve shielding structures, thus reducing the dose received by humans.
Jesús Pérez Curbelo, Ricardo Carvalho de Barros   +1 more
doaj   +1 more source

A Data-Driven Method for Calculating Neutron Flux Distribution Based on Deep Learning and the Discrete Ordinates Method

Energies
The efficient and accurate calculation of neutron flux distribution is essential for evaluating the safety of nuclear facilities and the surrounding environment.
Yanchao Li, Bin Zhang, Shouhai Yang, Yixue Chen   +3 more
doaj   +1 more source

Glueball Spectrum for QCD from AdS Supergravity Duality [PDF]

, 2000
We present the analysis of the complete glueball spectrum for the $AdS^7$ black hole supergravity dual of $QCD_4$ in strong coupling limit: $g^2 N \to \infty$.
Brandhuber, Brower, Brower, Cai, Capella, Chandrasekhar, Chung-I Tan, Constable, Csáki, Csáki, Csáki, De Mello Koch, DeWolfe, Fritzsch, Gross, Gubser, Gubser, Harte, Hashimoto, Hashimoto, Jaffe, Kaidalov, Kim, Kraus, Kuti, Maldacena, Minahan, Morningstar, Ooguri, Regge, Richard C Brower, Russo, Russo, Samir D Mathur, Tan, Tseytlin, van Nieuwenhuizen, Witten, Witten, Zyskin   +39 more
core   +2 more sources

Disinfection performance of an ultraviolet lamp: a CFD investigation

Acta Polytechnica, 2022
Ultraviolet (UV)-based devices have shown their effectiveness on various germicidal purposes. To serve their design optimisation, the disinfection effectiveness of a vertically cylindrical UV lamp, whose wattage ranges from P = 30 − 100 W, is numerically
Cuong Mai Bui, Nguyen Duy Minh Phan, Ngo Quoc Huy Tran, Le Anh Doan, Quang Truong Vo, Duy Chung Tran, Thi Thanh Vi Nguyen, Duc Long Nguyen, Van Sanh Huynh, Tran Anh Ngoc Ho   +9 more
doaj   +1 more source

The degenerate C. Neumann system I: symmetry reduction and convexity [PDF]

, 2012
The C. Neumann system describes a particle on the sphere S^n under the influence of a potential that is a quadratic form. We study the case that the quadratic form has l+1 distinct eigenvalues with multiplicity.
Dullin, Holger R., Hanßmann, Heinz
core   +1 more source

DOS: the discrete-ordinates system. [LMFBR] [PDF]

, 1982
The Discrete Ordinates System determines the flux of neutrons or photons due either to fixed sources specified by the user or to sources generated by particle interaction with the problem materials. It also determines numerous secondary results which depend upon flux. Criticality searches can be performed.
Rhoades, W. A., Emmett, M. B.
openaire   +2 more sources

Discontinuous finite-element quadrature sets based on icosahedron for the discrete ordinates method

Nuclear Engineering and Technology, 2020
The discrete ordinates method (SN) is one of the major shielding calculation method, which is suitable for solving deep-penetration transport problems.
Ni Dai, Bin Zhang, Yixue Chen
doaj   +1 more source

Comparison of Standard Light Water Reactor Cross-Section Libraries using the United States Nuclear Regulatory Commission Boiling Water Reactor Benchmark Problem

EPJ Web of Conferences, 2016
This paper describes a comparison of contemporary and historical light water reactor shielding and pressure vessel dosimetry cross-section libraries for a boiling water reactor calculational benchmark problem.
Kulesza Joel A., Alpan F. Arzu
doaj   +1 more source

A complex analogue of Toda's Theorem [PDF]

, 2011
Toda \cite{Toda} proved in 1989 that the (discrete) polynomial time hierarchy, $\mathbf{PH}$, is contained in the class $\mathbf{P}^{#\mathbf{P}}$, namely the class of languages that can be decided by a Turing machine in polynomial time given access to ...
Basu, Saugata
core   +3 more sources

The temperature-jump problem in rarefied-gas dynamics [PDF]

, 2000
An analytical version of the discrete-ordinates method is used here to solve the classical temperature-jump problem based on the BGK model in rarefied-gas dynamics.
C. E. Siewert, L. B. Barichello
core   +1 more source