摘要:

AbstractThe Infeld‐Rowlands method is an attempt to proove the stability of the Benjamin‐Bona‐Mahony

ISSN:0003-3804    

DOI:10.1002/andp.19895010602

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractThe theory of nuclear fission is reconsidered. We study the behaviour of the mass parameter as a dynamical quantity of the mass asymmetry. The dependence of the mass asymmetry mass parameter is studied as a function of the five collective coordinates. These parameters are reconsidered by including the temperature to show the temperature dependence of the mass parameter. The cranking model is used in developing all the mathematical and theoretical expressions. Numerical calculations of the obtained analytical expressions are carried out for the two fissioning nuclei236U and238U. The mass asymmetry mass parameters are calculated including the temperature as a function of the different five collective coordinates. The present study shows that the values of this mass asymmetry mass parameters are stable against the change of the temperature for temperature values greater than 1 MeV for all the different five collective coordinates.

ISSN:0003-3804    

DOI:10.1002/andp.19895010603

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractDie Liénard‐Wiechertsche Formel wird auf den Fall einer punktförmiger Multipolquelle verallgemeinert, die zeitabhängige Multipolmomente willkürlicher Stufen hat und einer beliebigen zeitartigen Weltlinie folgt. Die erhaltenen Potentiale sind strenge Lösungen von Gleichungen der Felder willkürlicher ganzzahliger Tensorstufes. Wenns⩾ 2 ist, so wird die Freiheit der Bewegung der Quelle von den Feldgleichungen eing

ISSN:0003-3804    

DOI:10.1002/andp.19895010604

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractA spectroscopic analysis of the various IR internal modes for the mixed crystal system of lithium nitrate and silver nitrate were carried out. The study aims mainly to find out the effect of partial replacement of Ag+ion by Li+ion on the internal fundamental modes of vibrations of the NO3−group in both of the ordering and disordering states of these two metallic nitrate compounds.The characteristic variations observed are attributed to differences in polarizability from cationic sphere around the nitrate group. An interesting increase of the maximum frequency observed on passing from pure components to mixtures is attributed to a change in force constan

ISSN:0003-3804    

DOI:10.1002/andp.19895010605

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractThe string model described by antisymmetric tensor fields which in many respects are analogous to spinors, is considered. So new possibilities in constructing the unified theory of physical interaction is appeared.

ISSN:0003-3804    

DOI:10.1002/andp.19895010606

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractMeasurements have been carried out to study the attenuation of neutron from a horizontal channel of the ET‐RR‐1 reactor. The assessments of neutron distribution inside three different types of locally prepared concretes have been evaluated.Neutron intensities in ilmenite‐limonite concrete shield show an exponential decrease with increasing concrete thickness. Ilmenite concrete is a good attenuator for thermal and intermediate neutrons. However, ordinary and ilmenite‐limonite concretes show efficient shielding for fast n

ISSN:0003-3804    

DOI:10.1002/andp.19895010607

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractIt is shown that cosmology destroys the fundamental on which it lies as a natural‐scientific discipline if it introduces subjectivistic principles as one of them is the so‐called Anthropic Principle that superseds the Copernican turn of sciences. Likewise conceptions are proved as conceptions that contradict the physical cosmology which conceive that the “World harmony” or the physical‐uniform grasping of the world can be derived from numbers or relations of numbers. This is due to the fact that these conceptions liquadate the advantage of physics to get via measurements statements abou

ISSN:0003-3804    

DOI:10.1002/andp.19895010608

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractA systematic investigation of the one‐ and two‐dimensional subspaces of the potential space in the projective field theory is made. From the one‐dimensional subspaces some stationary charged solutions can be generated. The two‐dimensional subspaces have an isometry group SU(1,1) which corresponds to the Einstein equations in vacuum, an O(2,1) group which corresponds to stationary charged solutions with constant scalar field, and an Abelian group which has no counterpart in the Einstein‐Maxwe

ISSN:0003-3804    

DOI:10.1002/andp.19895010609

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0003-3804    

DOI:10.1002/andp.19895010610

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0003-3804    

DOI:10.1002/andp.19895010611

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY