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Ewels, C.P.
Exeter Univ. (United Kingdom)
Exeter Univ. (United Kingdom)
AbstractAbstract
No abstract available
Source
Jul 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN015404; Thesis (Ph.D.)
Record Type
Miscellaneous
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Thesis/Dissertation
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INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Source
Aug 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN013840; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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Hines, R.I.
Bristol Univ. (United Kingdom)
Bristol Univ. (United Kingdom)
AbstractAbstract
No abstract available
Source
Jul 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN015154; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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AbstractAbstract
[en] The specific features of the implementation of the positron annihilation technique, positron non-destructive testing, in studying polymers with an abnormally high free volume (polyvinyltrimethylsilane, polytrimethylsilylpropyne, and polyphenylene oxide) as materials for nonporous gas-separating membranes and porous ultra-and microfilters were considered. The possibilities and advantages of describing the positron lifetime spectrum using three or four components were analyzed. The role of triplet positronium and of its bound state on pore walls as annihilation channels was considered in connection with the extremely long-lived (for polymers) positronium states that were observed, for example, in the porous polyphenylene oxide (τ = 26.2±3.7 ns). Structural transformations due to the open-quotes agingclose quotes of polytrimethylsilylpropyne were also studied
Primary Subject
Secondary Subject
Source
Cover-to-cover Translation of Khimiya Vysokikh Energii (USSR); Translated from Khimiya Vysokikh Energii; 28: No. 1, 53-59(1994).
Record Type
Journal Article
Literature Type
Translation
Journal
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Styles, V.
Sussex Univ., Brighton (United Kingdom)
Sussex Univ., Brighton (United Kingdom)
AbstractAbstract
No abstract available
Source
Jul 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN014018; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Source
1997; 148 p; Available from British Library Document Supply Centre- DSC:D198110; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Higashi, Masahiko; Yamamura, Norio; Nakajima, Hisao; Abe, Takuya
Proceedings of a joint US-Japan Seminar in the Environmental Sciences
Proceedings of a joint US-Japan Seminar in the Environmental Sciences
AbstractAbstract
[en] The present not is concerned with how the ecosystem maintains its energy and matter processes, and how those processes change throughout ecological and geological time, or how the constituent biota of an ecosystem maintain their life, and how ecological (species) succession and biological evolution proceed within an ecosystem. To advance further Tansky's (1976) approach to ecosystem organization, which investigated the characteristic properties of the developmental process of a model ecosystem, by applying Margalef's (1968) maximum maturity principle to derive its long term change, we seek a course for deriving the macroscopic trends along the organization process of an ecosystem as a consequence of the interactions among its biotic components and their modification of ecological traits. Using a simple ecosystem model consisting of four aggregated components (open-quotes compartmentsclose quotes) connected by nutrient flows, we investigate how a change in the value of a parameter alters the network pattern of flows and stocks, even causing a change in the value of another parameter, which in turn brings about further change in the network pattern and values of some (possible original) parameters. The continuation of this chain reaction involving feedbacks constitutes a possible mechanism for the open-quotes coevolutionclose quotes or open-quotes matchingclose quotes among flows, stocks, and parameters
Primary Subject
Source
DeAngelis, D.L. (ed.) (Oak Ridge National Lab., TN (United States)); Teramoto, E. (ed.) (Ryukoku Univ., Otsu (Japan)); Neergaard, D.A. (ed.) (Tennessee Univ., Knoxville, TN (United States)); Oak Ridge National Lab., TN (United States); 244 p; Nov 1993; p. 131-145; Joint United States-Japan seminar in the environmental sciences; Honolulu, HI (United States); 24-30 Apr 1988; Also available from OSTI as DE94004727; NTIS
Record Type
Report
Literature Type
Conference
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Pomeau, Y.
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Div. de la Physique
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Div. de la Physique
AbstractAbstract
[en] In this work it is reviewed a few known types of transition to turbulence, as the cascade of period doubling and the intermittent transition. This happens in dynamical systems with a few degrees of freedom, as modelled by the iteration of non linear maps. Then it is presented specific transitions for systems with many degrees of freedom. It is condidered first the occurence of a low frequency broadband noise in large cells at the onset of Rayleigh-Benard convection; then the transition by intermittent bursts in parallel flows. In this last case, one is concerned with localized and finite amplitude perturbations. Simple geometric arguments show that these fluctuations, when they are isolated and with a well definite relative speed, exist for a single value of the Reynolds number only
[fr]
On revoit certains types connus d'approche de la turbulence, tels la transition par cascade de dedoublements et la transition intermittente. Ceci concerne les systemes a petit nombre de degres de liberte que l'on peut modeler aisement par des iterations de transformations non lineaires. On presente ensuite d'autres transitions specifiques des systemes a grand nombre de degres de liberte. Ce sont l'apparition du bruit basse frequence pres du seuil de convection de Rayleigh-Benard en grande cellule et la transition par spots intermittents dans les ecoulements paralleles. Dans ce dernier cas, il s'agit de perturbations localisees et d'amplitude finie des equations de l'hydrodynamique. Des arguments geometriques simples montrent que ces fluctuations localisees, lorsqu'elles ont une vitesse relative definie et qu'elles sont isolees, n'existent que pour une valeur du nombre de ReynoldsOriginal Title
Approche de la turbulence
Primary Subject
Secondary Subject
Source
Jul 1981; 23 p; Conference of the French Physical Society; Clermont-Ferrand, France; 29 Jun - 4 Jul 1981
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Report
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Conference
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Wenham, M.J.G.
York Univ. (United Kingdom); In collaboration with Kratos Analytical
York Univ. (United Kingdom); In collaboration with Kratos Analytical
AbstractAbstract
No abstract available
Source
Jul 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN014776; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
Publication YearPublication Year
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Destuynder, P.
Electricite de France, 92 - Clamart. Service Informatique et Mathematiques Appliquees
Electricite de France, 92 - Clamart. Service Informatique et Mathematiques Appliquees
AbstractAbstract
[en] A new formulation of the membrane theory is presented in this paper. The assumptions which allow the Budiansky-Sanders' model or the membrane theory to be deduced from the three-dimensional case are pointed out
[fr]
Une nouvelle formulation de la theorie des membranes est donnee dans cet article. Les hypotheses qui permettent d'obtenir le modele de Budiansky-Sanders ou celui des membranes, sont mises en evidencePrimary Subject
Secondary Subject
Source
Feb 1981; 49 p
Record Type
Report
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