About stability of libration points in the restricted photogravitational three body problem     

Krzysztof Goździewski  Andrzej J. Maciejewski  Zuzanna Niedzielska 《Celestial Mechanics and Dynamical Astronomy》1991,52(2):195-201

Nonlinear stability of the triangular libration point in the photogravitational restricted three body problem was investigated in the whole range of the parameters. Some results obtained earlier are corrected. The method for proper determination of cases when stability cannot be determined by four order terms of the hamiltonian was proposed.  相似文献   

Picture atlas of the Arctic     

Krzysztof Birkenmajer 《Engineering Geology》1970,4(4):365-367

  相似文献   

Thylacocephalans          下载免费PDF全文

Krzysztof Broda  Thomas A. Hegna  Michał Zatoń 《Geology Today》2015,31(3):116-120

Thylacocephalans are an extinct group of arthropods of an uncertain systematic position. Originally considered phyllocarid crustaceans, they have since been classified within their own class, the Thylacocephala Pinna, Arduini, Pesarini and Teruzzi, 1982 on the basis of the exceptionally preserved Lower Jurassic (Sinemurian) species Ostenocaris cypriformis from Osteno, Italy. Since that time, the membership of the Thylacocephala has grown as a number of new species have been discovered, as well as previously known species moved into the group.  相似文献   

Location of the Rheic suture in the eastern Bohemian Massif: evidence from detrital zircon data     

Stanisław Mazur  Jacek Szczepański  Krzysztof Turniak  Neal J. McNaughton 《地学学报》2012,24(3):199-206

  相似文献   

The changes of groundwater chemistry of semi-confined buried valley aquifer during one decade of water exploitation     

Krzysztof Dragon 《Environmental Earth Sciences》2012,65(4):1283-1290

This article presents the analysis of the temporal changes in water chemistry in a semi-confined aquifer (Wielkopolska Buried Valley aquifer, Poland) during one decade of water exploitation. It is shown that the groundwater contamination, as documented in a previous work, still persists and has lead to steady groundwater quality deterioration. The most intensive changes in water chemistry due to contamination are observed in the regions recognized earlier as the most vulnerable parts of the aquifer. The influence of contamination is effective despite implementation of groundwater protection activities. The travails of groundwater quality protection of the confined or semi-confined aquifers were accented.  相似文献   

Fast cosmic microwave background power spectrum estimation of temperature and polarization with Gabor transforms     

Frode K. Hansen  Krzysztof M. Górski 《Monthly notices of the Royal Astronomical Society》2003,343(2):559-584

  相似文献   

Pleurozium schreberi as bioindicator of mercury pollution in heavily industrialized region     

Aleksandra Samecka-Cymerman  Grzegorz Kosior  Krzysztof Kolon  Bronisław Wojtuń  Krzysztof Zawadzki  Andrzej Rudecki  Alexander J. Kempers 《Journal of Atmospheric Chemistry》2013,70(2):105-114

This research is continuation of the investigation of metal accumulation in native and transplanted moss Pleurozium schreberi in the most industrialized and affected region in Poland (Upper Silesia). We tested the hypotheses that in Upper Silesia transplants of P. schreberi may be used in a 90 days bioindication experiment in case native specimens are absent; a 90 days exposure of transplanted P. schreberi was long enough for evaluation of Hg pollution of the environment. An assay was carried out with native mosses at 27 polluted sites and mosses from an uncontaminated control site transplanted to the same 27 polluted sites. P. schreberi collected from the same sites as classified for more and less polluted basing on Pb and Zn concentrations show quite different pattern of pollution with mercury; The accumulation of Hg by the transplants increased much faster in the first 45 days of the experiment (accumulation factor 1.5–6.7; mean 3.4?±?0.5) in comparison with the second period from day 45 to 90 (accumulation factor 1.0–1.6; mean 1.2?±?0.1). The 90 days exposure of transplanted P. schreberi was long enough for evaluation of Hg pollution of the environment. Transplants of P. schreberi may be used in a 90 days bioindication experiment in case native specimens are absent.  相似文献   

Gabor transforms on the sphere with applications to CMB power spectrum estimation     

Frode K. Hansen  Krzysztof M. Górski  Eric Hivon 《Monthly notices of the Royal Astronomical Society》2002,336(4):1304-1328

  相似文献   

Magnetic Fields in Cluster and Interacting Galaxies     

Krzysztof T. Chyży  Marek Urbanik  Marian Soida  Rainer Beck 《Astrophysics and Space Science》2002,281(1-2):409-410

Our VLA and Effelsberg radio polarization studies of the interacting and cluster galaxies (NGC 3627, NGC 4038/39, NGC 4254) show that magnetic fields could help us in understanding galaxy peculiar gas motions and cluster environmental effects. This revised version was published online in September 2006 with corrections to the Cover Date.  相似文献   

Thermodynamic properties and phase stability of wadsleyite II     

Kamil Tokár  Paweł T. Jochym  Przemysław Piekarz  Jan Łażewski  Małgorzata Sternik  Krzysztof Parlinski 《Physics and Chemistry of Minerals》2013,40(3):251-257

The thermodynamical stability of a newly observed wadsleyite II phase in the Mg₂SiO₄ system is studied by the density functional theory. The wadsleyite II equation of state has been derived. The phase boundaries of Mg₂SiO₄ polymorphs: wadsleyite, wadsleyite II and ringwoodite are studied using the quasi-harmonic approximation at high external pressures. Clapeyron slopes determined for wadsleyite II–ringwoodite and wadsleyite–wadsleyite II boundaries are 0.0047 and 0.0058 GPa/K, respectively. It is shown that the wadsleyite II phase is not thermodynamically preferred in the pure Mg₂SiO₄ system and will probably not occur between wadsleyite and ringwoodite phases.  相似文献