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assessment of concentration of air pollutants using analytical and numerical solution
of the atmospheric diffusion equation
1 MB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/44/096/44096828.pdf  Text Version
by Esmail, S.F.H. (Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo (Egypt)); Zagazig University , Department of Mathematics (Egypt)
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1 MB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/44/096/44096828.pdf  Text Version
by Esmail, S.F.H. (Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo (Egypt)); Zagazig University , Department of Mathematics (Egypt)
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[en]
The mathematical formulation of numerous physical problems a results in differential
equations actually partial or ordinary differential equations.In our study we are
interested in solutions of partial differential equations.The aim of this work is
to calculate the concentrations of the pollution, by solving the atmospheric diffusion
equation(ADE) using different mathematical methods of solution. It is difficult to
solve the general form of ADE analytically, so we use some assumptions to get its
solution.The solutions of it depend on the eddy diffusivity profiles(k) and the wind
speed u. We use some physical assumptions to simplify its formula and solve it. In
the present work, we solve the ADE analytically in three dimensions using Green's
function method, Laplace transform method, normal mode method and these separation
of variables method. Also, we use ADM as a numerical method. Finally, comparisons
are made with the results predicted by the previous methods and the observed data.$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97), ENVIRONMENTAL SCIENCES (S54)
Source/Report2011; 123 p; INISEG298; 54 tabs.,42 figs.,148 refs.; Thesis(PhD.)
Record TypeThesis/Dissertation
Country/Org.Egypt
DECDATA, DIFFERENTIAL EQUATIONS, ELECTROMAGNETIC RADIATION, EQUATIONS, FUNCTIONS, INFORMATION, INTEGRAL TRANSFORMATIONS, MATHEMATICAL SOLUTIONS, NOISE, POLLUTION, RADIATIONS, RADIO NOISE, RADIOWAVE RADIATION, TRANSFORMATIONS
DEIAIR POLLUTION, ANALYTICAL SOLUTION, ATMOSPHERICS, DIFFERENTIAL EQUATIONS, GREEN FUNCTION, LAPLACE TRANSFORMATION, MATHEMATICS, NUMERICAL DATA, NUMERICAL SOLUTION, PARTIAL DIFFERENTIAL EQUATIONS, THREEDIMENSIONAL CALCULATIONS
LanguageEnglish
Ref. Number44096828
Publ. Year2011
INIS Volume44
INIS Issue43
Optimal recovery of linear operators in nonEuclidean metrics
http://dx.doi.org/10.1070/SM2014v205n10ABEH004425
by Osipenko, K Yu (Moscow State Aviation Technological University, Moscow (Russian Federation))
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http://dx.doi.org/10.1070/SM2014v205n10ABEH004425
by Osipenko, K Yu (Moscow State Aviation Technological University, Moscow (Russian Federation))
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[en]
The paper looks at problems concerning the recovery of operators from noisy information
in nonEuclidean metrics. A number of general theorems are proved and applied
to recovery problems for functions and their derivatives from the noisy Fourier transform.
In some cases, a family of optimal methods is found, from which the methods requiring
the least amount of original information are singled out. Bibliography: 25 titles$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportSbornik. Mathematics; v. 205(10); ISSN 10645616; ; 31 Oct 2014; p. 14421472; Available from http://dx.doi.org/10.1070/SM2014v205n10ABEH004425; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United States
DECINTEGRAL TRANSFORMATIONS, TRANSFORMATIONS
DEIFOURIER TRANSFORMATION, FUNCTIONS, MATHEMATICAL OPERATORS, MATHEMATICAL SOLUTIONS, METRICS
LanguageEnglish
Ref. Number46070019
Publ. Year2014
INIS Volume46
INIS Issue27
External URLhttp://dx.doi.org/10.1070/SM2014v205n10ABEH004425
Stochastic computational approach for complex nonlinear ordinary differential equations
by Ali Khan, Junaid; Raja, Asif Zahoor (Department of Electronic Engineering, International Islamic University, Islamabad (Pakistan)); Qureshi, Ijaz Mansoor (Department of Electronical Engineering, Air University, Islamabad (Pakistan))
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by Ali Khan, Junaid; Raja, Asif Zahoor (Department of Electronic Engineering, International Islamic University, Islamabad (Pakistan)); Qureshi, Ijaz Mansoor (Department of Electronical Engineering, Air University, Islamabad (Pakistan))
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[en]
We present an evolutionary computational approach for the solution of nonlinear ordinary
differential equations (NLODEs). The mathematical modeling is performed by a feedforward
artificial neural network that defines an unsupervised error. The training of these
networks is achieved by a hybrid intelligent algorithm, a combination of global search
with genetic algorithm and local search by pattern search technique. The applicability
of this approach ranges from single order NLODEs, to systems of coupled differential
equations. We illustrate the method by solving a variety of model problems and present
comparisons with solutions obtained by exact methods and classical numerical methods.
The solution is provided on a continuous finite time interval unlike the other numerical
techniques with comparable accuracy. With the advent of neuroprocessors and digital
signal processors the method becomes particularly interesting due to the expected
essential gains in the execution speed. (authors)$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportChinese Physics Letters; v. 28(2); ISSN 0256307X; ; Feb 2011; [4 p.]; 5 figs., 3 tabs., 18 refs.
Record TypeJournal article
Country/Org.China
DECEQUATIONS, EVALUATION, MATHEMATICAL LOGIC
DEIACCURACY, ALGORITHMS, COMPARATIVE EVALUATIONS, DIFFERENTIAL EQUATIONS, HYBRIDIZATION, MATHEMATICAL MODELS, MATHEMATICAL SOLUTIONS, NEURAL NETWORKS, NONLINEAR PROBLEMS, STOCHASTIC PROCESSES
LanguageEnglish
Ref. Number46076608
Publ. Year2011
INIS Volume46
INIS Issue29
A topological classification of the Chaplygin systems in the dynamics of a rigid
body in a fluid
http://dx.doi.org/10.1070/SM2014v205n02ABEH004373
by Nikolaenko, S S (M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation))
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http://dx.doi.org/10.1070/SM2014v205n02ABEH004373
by Nikolaenko, S S (M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation))
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[en]
The paper is concerned with the topological analysis of the Chaplygin integrable case
in the dynamics of a rigid body in a fluid. A full list of the topological
types of Chaplygin systems in their dependence on the energy level is compiled on
the basis of the FomenkoZieschang theory. An effective description of the topology
of the Liouville foliation in terms of natural coordinate variables is also presented,
which opens a direct way to calculating topological invariants. It turns out
that on all nonsingular energy levels Chaplygin systems are Liouville equivalent to
the wellknown Euler case in the dynamics of a rigid body with fixed point. Bibliography:
23 titles$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportSbornik. Mathematics; v. 205(2); ISSN 10645616; ; 28 Feb 2014; p. 224268; Available from http://dx.doi.org/10.1070/SM2014v205n02ABEH004373; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United States
DECMATHEMATICS
DEICLASSIFICATION, COORDINATES, ENERGY LEVELS, FLUIDS, INTEGRAL CALCULUS, MATHEMATICAL SOLUTIONS, TOPOLOGY
LanguageEnglish
Ref. Number46071074
Publ. Year2014
INIS Volume46
INIS Issue27
External URLhttp://dx.doi.org/10.1070/SM2014v205n02ABEH004373
Methods used to address protection issues in graphitegas reactors
11 MB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/46/034/46034786.pdf  Text Version
by Brisbois, Jacques; Commissariat a l'Energie Atomique  CEA, Centre d'Etudes Nucleaires de FontenayauxRoses, Direction des Piles Atomiques, Departement des Etudes de Piles, Service d'Etudes de Protections de Piles (France)
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11 MB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/46/034/46034786.pdf  Text Version
by Brisbois, Jacques; Commissariat a l'Energie Atomique  CEA, Centre d'Etudes Nucleaires de FontenayauxRoses, Direction des Piles Atomiques, Departement des Etudes de Piles, Service d'Etudes de Protections de Piles (France)
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[en]
Protection issues are problems related to the presence of neutron and gamma radiations:
biological dose, material heating, Wigner effect, gas ionization. The objective is
then to determine the biological doses which are predictable in some reactor areas,
and to assess the effects of irradiation on materials during the reactor lifetime.
For these purposes, problems of particle propagation are addressed, and the effects
of radiations related to one phenomenon or another are studied with respect to radiation
energy. The author first describes methods used to compute general propagation. These
are mainly codes using Monte Carlo or multigroup scattering methods. These methods
are experimentally controlled on a subcritical graphitenatural uranium set. In a
second part, the author presents the different radiation sources which are to be taken
into account in calculations. Then he indicates the nuclear constants to be used in
the different codes, as well as the response functions to be used to calculate a specific
phenomenon (steel, graphite Wigner effect, so on) from the particle spectrum. In the
fourth part, the author describes the different methods which can be used to solve
problems which are specific to graphite reactors. In the last part, obtained calculated
results are compared with experimental measurements performed on power reactors$$$$[fr]
Il convient avant
tout de definir ce que l'on entend par problemes de protection. Nous appelerons problemes
de protection, les problemes lies a la presence de neutrons et de gamma, tels que
dose biologique, echauffement des materiaux, effet Wigner, ionisation des gaz. Le
but principal des etudes est de determiner les doses biologiques previsibles en certains
points du reacteur, en marche ou a l'arret, ce qui peut conduire d'ailleurs a proposer
des modifications des structures permettant d'atteindre les conditions de dose recherchees.
Mais c'est aussi de fournir aux technologues les renseignements necessaires pour qu'ils
puissent evaluer les effets des rayonnements sur les materiaux pendant la duree de
vie du reacteur. Pour atteindre ce but, on est amene d'une part a traiter des problemes
de propagation de particules et d'autre part a etudier les effets des rayonnements
relatifs a tel ou tel phenomene, en fonction de leur energie. Le premier chapitre
est consacre a la description de methodes de calcul de propagation a caractere general.
Ce sont essentiellement des codes de calcul sur IBM 360 utilisant des methodes de
Monte Carlo ou de diffusion multigroupes. Ces methodes ont ete verifiees experimentalement
sur le dispositif NAIADE II, qui est un ensemble souscritique graphiteuranium naturel.
Nous presentons au 2e chapitre les sources de rayonnement a prendre en compte dans
les calculs. Au chapitre 3, nous donnons les constantes nucleaires a utiliser dans
les differents codes, ainsi que les fonctions de reponse a utiliser pour calculer
un phenomene particulier (effet Wigner graphite, acier...) a partir du spectre de
particules. Dans le chapitre 4, nous decrivons les differentes methodes qui peuvent
etre utilisees pour resoudre les problemes specifiques des piles a graphite. Enfin
au chapitre 5, nous comparons les resultats obtenus par ces methodes aux mesures effectuees
sur les reacteurs de puissance. (auteur)Orig. TitleMethodes utilisees pour traiter les problemes de protection des reacteurs de la filiere graphitegaz
SubjectSPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS (S21), MATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportJan 1969; 32 p; CEAN1048; 49 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and Email addresses: http://www.iaea.org/inis/Contacts/
Record TypeReport
Country/Org.France
DECBARYONS, CALCULATION METHODS, CROSS SECTIONS, DOSES, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, EVALUATION, EXPERIMENTAL REACTORS, FERMIONS, HADRONS, HEAVY WATER COOLED REACTORS, HEAVY WATER MODERATED REACTORS, IONIZING RADIATIONS, IRRADIATION REACTORS, ISOTOPE PRODUCTION REACTORS, NATURAL URANIUM REACTORS, NEUTRON TRANSPORT THEORY, NUCLEONS, PARTICLE SOURCES, RADIATION SOURCES, RADIATIONS, REACTORS, RESEARCH AND TEST REACTORS, RESEARCH REACTORS, TANK TYPE REACTORS, THERMAL REACTORS, TRANSPORT THEORY
DEICOMPARATIVE EVALUATIONS, COMPUTER CODES, EL1 REACTOR, GAMMA RADIATION, GRAPHITE MODERATED REACTORS, GROUP CONSTANTS, IRRADIATION, MONTE CARLO METHOD, MULTIGROUP THEORY, NEUTRON CONVERTERS, NEUTRON SOURCES, NEUTRONS, RADIATION DOSES, RADIATION EFFECTS, RADIATION PROTECTION, WIGNER EFFECT
LanguageFrench
Ref. Number46034786
Publ. Year1969
INIS Volume46
INIS Issue14
Fullerenes and diskfullerenes
http://dx.doi.org/10.1070/RM2013v068n04ABEH004850
by Deza, M (Ecole Normale Superieure, Paris (France)); Dutour Sikirić, M (Rudjer Boškovic Institute, Zagreb (Croatia)); Shtogrin, M I (P.G.Demidov Yaroslavl State University (Russian Federation))
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http://dx.doi.org/10.1070/RM2013v068n04ABEH004850
by Deza, M (Ecole Normale Superieure, Paris (France)); Dutour Sikirić, M (Rudjer Boškovic Institute, Zagreb (Croatia)); Shtogrin, M I (P.G.Demidov Yaroslavl State University (Russian Federation))
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[en]
A geometric fullerene, or simply a fullerene, is the surface of a simple closed convex
3dimensional polyhedron with only 5 and 6gonal faces. Fullerenes are
geometric models for chemical fullerenes, which form an important class of organic
molecules. These molecules have been studied intensively in chemistry, physics, crystallography,
and so on, and their study has led to the appearance of a vast literature on fullerenes
in mathematical chemistry and combinatorial and applied geometry. In particular, several
generalizations of the notion of a fullerene have been given, aiming at various
applications. Here a new generalization of this notion is proposed: an ndiskfullerene.
It is obtained from the surface of a closed convex 3dimensional polyhedron which
has one ngonal face and all other faces 5 and 6gonal, by removing the ngonal face.
Only 5 and 6diskfullerenes correspond to geometric fullerenes. The notion
of a geometric fullerene is therefore generalized from spheres to compact simply
connected twodimensional manifolds with boundary. A twodimensional surface is said
to be unshrinkable if it does not contain belts, that is, simple cycles consisting
of 6gons each of which has two neighbours adjacent at a pair of opposite edges.
Shrinkability of fullerenes and ndiskfullerenes is investigated. Bibliography: 87
titles$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportRussian Mathematical Surveys; v. 68(4); ISSN 00360279; ; CODEN RMSUAF; 31 Aug 2013; p. 665720; Available from http://dx.doi.org/10.1070/RM2013v068n04ABEH004850; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United Kingdom
DECCARBON, ELEMENTS, MATHEMATICS, NONMETALS
DEIFULLERENES, GEOMETRY, MATHEMATICAL MANIFOLDS, MOLECULES, SURFACES, THREEDIMENSIONAL CALCULATIONS, TWODIMENSIONAL CALCULATIONS
LanguageEnglish
Ref. Number46068606
Publ. Year2013
INIS Volume46
INIS Issue27
External URLhttp://dx.doi.org/10.1070/RM2013v068n04ABEH004850
Heavy steel reflector evaluation using diffusion theory
242 KB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/45/091/45091439.pdf  Text Version
by Piovezan, Pamela; Carluccio, Thiago (Centro Tecnologico da Marinha (CTMSP), Sao Paulo, SP (Brazil). Dept. de Neutronica e Blindagem); Abe, Alfredo; Santos, Adimir dos (Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNENSP), Sao Paulo, SP (Brazil)), Email: pamela.piovezan@ctmsp.mar.mil.br, Email: thiago.carluccio@ctmsp.mar.mil, Email: alfredo@ctmsp.mar.mil.br, Email: asantos@ipen.br; Associacao Brasileira de Energia Nuclear (ABEN), Rio de Janeiro, RJ (Brazil)
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242 KB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/45/091/45091439.pdf  Text Version
by Piovezan, Pamela; Carluccio, Thiago (Centro Tecnologico da Marinha (CTMSP), Sao Paulo, SP (Brazil). Dept. de Neutronica e Blindagem); Abe, Alfredo; Santos, Adimir dos (Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNENSP), Sao Paulo, SP (Brazil)), Email: pamela.piovezan@ctmsp.mar.mil.br, Email: thiago.carluccio@ctmsp.mar.mil, Email: alfredo@ctmsp.mar.mil.br, Email: asantos@ipen.br; Associacao Brasileira de Energia Nuclear (ABEN), Rio de Janeiro, RJ (Brazil)
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[en]
A new component named heavy reflector that did not exist in actual nuclear power plants
was introduced recently by the EPR reactor. The component was designed to partially
reflect neutrons inside the core to increase fuel efficiency and protect the vessel
during its 60year operational life. Recently, an experiment was designed and performed
to address the real neutron reflector contribution due to the stainless steel in the
IPEN/MB01 research reactor. The experiment consisted of several plates of stainless
steel which were conveniently positioned at water reflector region of the reactor
core. The main experimental results were the critical control bank positions and reactivity
as a function of the number of stainless steel plates. The main outcome of the experimental
results showed a quite clear effect on neutron absorption and neutron reflection due
to the stainless steel plates. The objective of this preliminary work is to address
theoretically this experiment using the diffusion theory code CITATION, besides existing
evaluation using Monte Carlo (MCNP and Tripoli) and transport (TORT) codes, in order
to verify the performance of diffusion theory for the reflector region. (author)$$$$SubjectSPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS (S21), MATHEMATICAL METHODS AND COMPUTING (S97)
Source/Report2013; 8 p; INAC 2013: international nuclear atlantic conference; Recife, PE (Brazil); 2429 Nov 2013; INISBR14402; 7 refs., 3 figs., 1 tab.
Record TypeMiscellaneous
Country/Org.Brazil
DECALLOYS, CARBON ADDITIONS, COMPUTER CODES, EXPERIMENTAL REACTORS, HIGH ALLOY STEELS, IRON ALLOYS, IRON BASE ALLOYS, RADIATION FLUX, REACTOR COMPONENTS, REACTORS, RESEARCH AND TEST REACTORS, SORPTION, STEELS, TRANSITION ELEMENT ALLOYS, ZERO POWER REACTORS
DEIABSORPTION, C CODES, CROSS SECTIONS, DISTRIBUTION, EIGENVALUES, H CODES, IPENMB1 REACTOR, NEUTRON FLUX, NEUTRON REFLECTORS, PERFORMANCE, REACTOR CORES, STAINLESS STEELS
LanguageEnglish
Ref. Number45091439
Publ. Year2013
INIS Volume45
INIS Issue40
Generalization of Doob's optional sampling theorem for deformed submartingales
http://dx.doi.org/10.1070/RM2013v068n06ABEH004874
by Pavlov, I V; Nazarko, O V (RostovonDon State Building University (Russian Federation))
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http://dx.doi.org/10.1070/RM2013v068n06ABEH004874
by Pavlov, I V; Nazarko, O V (RostovonDon State Building University (Russian Federation))
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English 31 Dec 2013 p. 11391141 United Kingdom Pavlov, IV Nazarko,
OV RostovonDon State Building University (Russian ... $$$$
SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportRussian Mathematical Surveys; v. 68(6); ISSN 00360279; ; CODEN RMSUAF; 31 Dec 2013; p. 11391141; Available from http://dx.doi.org/10.1070/RM2013v068n06ABEH004874; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United Kingdom
DECSPACE
DEICALCULATION METHODS, MATHEMATICAL MODELS, MATHEMATICAL SOLUTIONS, MATHEMATICAL SPACE
LanguageEnglish
Ref. Number46068521
Publ. Year2013
INIS Volume46
INIS Issue27
External URLhttp://dx.doi.org/10.1070/RM2013v068n06ABEH004874
OV RostovonDon State Building University (Russian ... $$$$
SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportRussian Mathematical Surveys; v. 68(6); ISSN 00360279; ; CODEN RMSUAF; 31 Dec 2013; p. 11391141; Available from http://dx.doi.org/10.1070/RM2013v068n06ABEH004874; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United Kingdom
DECSPACE
DEICALCULATION METHODS, MATHEMATICAL MODELS, MATHEMATICAL SOLUTIONS, MATHEMATICAL SPACE
LanguageEnglish
Ref. Number46068521
Publ. Year2013
INIS Volume46
INIS Issue27
External URLhttp://dx.doi.org/10.1070/RM2013v068n06ABEH004874
A GPUbased Monte Carlo dose calculation code for photon transport in a voxel phantom
360 KB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/45/089/45089780.pdf  Text Version
by Bellezzo, M.; Do Nascimento, E.; Yoriyaz, H. (Instituto de Pesquisas Energeticas e Nucleares / CNEN, Av. Lineu Prestes 2242, Cidade Universitaria, 05508000 Sao Paulo (Brazil)), Email: mbellezzo@gmail.br; Sociedad Peruana de Radioproteccion, Lima (Peru); Sociedad Mexicana de Irradiacion y Dosimetria, Mexico D. F. (Mexico). Funding organisation: Organizacion Panamericana de la Salud, Washington D. C. (United States); Universidad Nacional de San Antonio de Abad del Cusco, Cusco (Peru); Instituto Peruano de Energia Nuclear, Lima (Peru); Elekta AB (Sweden); RadPro International GmbH (Germany); ThermoFisher Scientific, Inc. (United States); Varian Medical Systems (United States)
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360 KB  http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/45/089/45089780.pdf  Text Version
by Bellezzo, M.; Do Nascimento, E.; Yoriyaz, H. (Instituto de Pesquisas Energeticas e Nucleares / CNEN, Av. Lineu Prestes 2242, Cidade Universitaria, 05508000 Sao Paulo (Brazil)), Email: mbellezzo@gmail.br; Sociedad Peruana de Radioproteccion, Lima (Peru); Sociedad Mexicana de Irradiacion y Dosimetria, Mexico D. F. (Mexico). Funding organisation: Organizacion Panamericana de la Salud, Washington D. C. (United States); Universidad Nacional de San Antonio de Abad del Cusco, Cusco (Peru); Instituto Peruano de Energia Nuclear, Lima (Peru); Elekta AB (Sweden); RadPro International GmbH (Germany); ThermoFisher Scientific, Inc. (United States); Varian Medical Systems (United States)
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[en]
As the most accurate method to estimate absorbed dose in radiotherapy, Monte Carlo
method has been widely used in radiotherapy treatment planning. Nevertheless, its
efficiency can be improved for clinical routine applications. In this paper, we present
the CUBMC code, a GPUbased Mc photon transport algorithm for dose calculation under
the Compute Unified Device Architecture platform. The simulation of physical events
is based on the algorithm used in Penelope, and the cross section table used is the
one generated by the Material routine, als present in Penelope code. Photons are transported
in voxelbased geometries with different compositions. To demonstrate the capabilities
of the algorithm developed in the present work four 128 x 128 x 128 voxel phantoms
have been considered. One of them is composed by a homogeneous waterbased media,
the second is composed by bone, the third is composed by lung and the fourth is composed
by a heterogeneous bone and vacuum geometry. Simulations were done considering a 6
MeV monoenergetic photon point source. There are two distinct approaches that were
used for transport simulation. The first of them forces the photon to stop at every
voxel frontier, the second one is the Woodcock method, where the photon stop in the
frontier will be considered depending on the material changing across the photon travel
line. Dose calculations using these methods are compared for validation with Penelope
and MCNP5 codes. Speedup factors are compared using a NVidia GTX 560Ti GPU card
against a 2.27 GHz Intel Xeon CPU processor. (Author)$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportAug 2014; 14 p; Sociedad Mexicana de Irradiacion y Dosimetria; Mexico, D. F. (Mexico); 14. International Symposium on Solid State Dosimetry; 14. Conferencia Internacional sobre Dosimetria de Estado Solido; Cusco (Peru); 1316 Apr 2014; INISMX2747
Record TypeMiscellaneous
Country/Org.Mexico
DECBODY, BOSONS, CALCULATION METHODS, DOSES, ELEMENTARY PARTICLES, ENERGY RANGE, EVALUATION, HYDROGEN COMPOUNDS, INFORMATION, MASSLESS PARTICLES, MATHEMATICAL LOGIC, MATHEMATICS, MEDICINE, MOCKUP, NEUTRALPARTICLE TRANSPORT, NUCLEAR MEDICINE, ORGANS, OXYGEN COMPOUNDS, RADIATION DOSES, RADIATION SOURCES, RADIATION TRANSPORT, RADIOLOGY, RESPIRATORY SYSTEM, SIMULATION, STRUCTURAL MODELS, TESTING, THERAPY
DEIABSORBED RADIATION DOSES, ALGORITHMS, COMPARATIVE EVALUATIONS, COMPUTERIZED SIMULATION, CROSS SECTIONS, DATA, EFFICIENCY, GEOMETRY, LUNGS, MEV RANGE, MONTE CARLO METHOD, PHANTOMS, PHOTON TRANSPORT, PHOTONS, PLANNING, POINT SOURCES, RADIOTHERAPY, SKELETON, VALIDATION, WATER
LanguageEnglish
Ref. Number45089780
Publ. Year2014
INIS Volume45
INIS Issue39
Testing SLURM open source batch system for a Tierl/Tier2 HEP computing facility
http://dx.doi.org/10.1088/17426596/513/3/032027
by Donvito, Giacinto; Italiano, Alessandro (INFNBari, via Orabona 4, 70126 Bari (Italy)); Salomoni, Davide (INFNCNAF, Viale Berti Pichat 6/2 40127 Bologna (Italy)), Email: giacinto.donvito@ba.infn.it, Email: davide.salomoni@cnaf.infn.it, Email: alessandro.italiano@cnaf.infn.it
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http://dx.doi.org/10.1088/17426596/513/3/032027
by Donvito, Giacinto; Italiano, Alessandro (INFNBari, via Orabona 4, 70126 Bari (Italy)); Salomoni, Davide (INFNCNAF, Viale Berti Pichat 6/2 40127 Bologna (Italy)), Email: giacinto.donvito@ba.infn.it, Email: davide.salomoni@cnaf.infn.it, Email: alessandro.italiano@cnaf.infn.it
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[en]
In this work the testing activities that were carried on to verify if the SLURM batch
system could be used as the production batch system of a typical Tier1/Tier2 HEP computing
center are shown. SLURM (Simple Linux Utility for Resource Management) is an Open
Source batch system developed mainly by the Lawrence Livermore National Laboratory,
SchedMD, Linux NetworX, HewlettPackard, and Groupe Bull. Testing was focused both
on verifying the functionalities of the batch system and the performance that SLURM
is able to offer. We first describe our initial set of requirements. Functionally,
we started configuring SLURM so that it replicates all the scheduling policies already
used in production in the computing centers involved in the test, i.e. INFNBari and
the INFNTier1 at CNAF, Bologna. Currently, the INFNTier1 is using IBM LSF (Load
Sharing Facility), while INFNBari, an LHC Tier2 for both CMS and Alice, is using
Torque as resource manager and MAUI as scheduler. We show how we configured SLURM
in order to enable several scheduling functionalities such as Hierarchical FairShare,
Quality of Service, userbased and groupbased priority, limits on the number of jobs
per user/group/queue, job age scheduling, job size scheduling, and scheduling of consumable
resources. We then show how different job typologies, like serial, MPI, multithread,
wholenode and interactive jobs can be managed. Tests on the use of ACLs on queues
or in general other resources are then described. A peculiar SLURM feature we also
verified is triggers on event, useful to configure specific actions on each possible
event in the batch system. We also tested highly available configurations for the
master node. This feature is of paramount importance since a mandatory requirement
in our scenarios is to have a working farm cluster even in case of hardware failure
of the server(s) hosting the batch system. Among our requirements there is also the
possibility to deal with preexecution and postexecution scripts, and controlled
handling of the failure of such scripts. This feature is heavily used, for example,
at the INFNTier1 in order to check the health status of a worker node before execution
of each job. Pre and postexecution scripts are also important to let WNoDeS, the
IaaS Cloud solution developed at INFN, use SLURM as its resource manager. WNoDeS has
already been supporting the LSF and Torque batch systems for some time; in this work
we show the work done so that WNoDeS supports SLURM as well. Finally, we show several
performance tests that we carried on to verify SLURM scalability and reliability,
detailing scalability tests both in terms of managed nodes and of queued jobs.$$$$SubjectMATHEMATICAL METHODS AND COMPUTING (S97)
Source/ReportJournal of Physics. Conference Series (Online); v. 513(3); ISSN 17426596; ; 11 Jun 2014; [6 p.]; CHEP2013: 20. international conference on computing in high energy and nuclear physics; Amsterdam (Netherlands); 1418 Oct 2013; Available from http://dx.doi.org/10.1088/17426596/513/3/032027; Country of input: International Atomic Energy Agency (IAEA)
Record TypeJournal article
Country/Org.United Kingdom
DECACCELERATORS, CYCLIC ACCELERATORS, MAGNETIC MIRRORS, NATIONAL ORGANIZATIONS, OPEN PLASMA DEVICES, PROGRAMMING, STORAGE RINGS, SYNCHROTRONS, THERMONUCLEAR DEVICES, US DOE, US ORGANIZATIONS
DEIALICE, CERN LHC, COMPUTER ARCHITECTURE, CONFIGURATION, LAWRENCE LIVERMORE NATIONAL LABORATORY, MATHEMATICAL SOLUTIONS, PARALLEL PROCESSING, PERFORMANCE, PERSONNEL, RELIABILITY, TESTING
LanguageEnglish
Ref. Number46083168
Publ. Year2014
INIS Volume46
INIS Issue31
External URLhttp://dx.doi.org/10.1088/17426596/513/3/032027
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