Book review     

David Gubbins  Sergei E. Zharinov  Philip England  Youjiang Wang  Gerardo G. Tango  Richard Barakat  Bruno Lang  Andrzej W. Wernik 《Pure and Applied Geophysics》1990,134(2):313-332

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Pre-Variscan basement rocks in southern Poland: Where is the southeastern margin of eastern Avalonia (Cadomia)?     

Andrzej Żelaźniewicz  Stefan Cwojdziński 《Studia Geophysica et Geodaetica》1995,39(3):354-363

Summary Pre-Variscan basement in southern Poland is poorly exposed and thus known mostly from subsurface data. The availability of the latter is reviewed for terrains located between the Sudetes and the East European Platform. In these terrains the following relationships have been documented: Cadomian granitoids capped by Variscan flysch, Palaeozoic platform strata, Palaeozic folded and partly thermally altered successions, and low-grade metamorphic rocks overlain by Middle Cambrian strata. In view of their interrelationships the location of the Avalonia-Baltica suture in southeastern Poland is uncertain.  相似文献   

The Taylor series method for the problem of the rotational motion of a rigid satellite     

Krzysztof Goździewski  Andrzej J. Maciejewski 《Astrophysics and Space Science》1995,232(1):167-184

This paper presents the Taylor series method for integration of differential equations describing the rotational motion of a rigid satellite. We compared the presented algorithm with other methods, and we show that it gives the most accurate results with reasonable efficiency.  相似文献   

On the gravitational fields of Pandora and Prometheus     

Krzysztof Goździewski  Andrzej J. Maciejewski 《Earth, Moon, and Planets》1995,69(1):25-50

Utilizing topographic models of Saturn's F-ring shepherd satellites Prometheus (S16 1980S27) and Pandora (S15 1980S26), derived by Stooke (1994), and supposing that their mass density is constant, we derived basic geometrical and dynamical characteristics of the moons. They include the volume and mass, the mean radii, the tensor of inertia, and Stokes coefficients of the harmonic expansions of external gravitational potential. The best fitting ellipsoid approximations of the topography were calculated. A simple method of determining the gravitational potential on the surface of an irregular satellite is presented. Examples of equipotential surfaces of the satellites are shown  相似文献   

Solutions homoclinic to regular precessions of a symmetric satellite     

Andrzej J. Maciejewski  Krzysztof Goźiewski 《Celestial Mechanics and Dynamical Astronomy》1995,61(4):347-368

The aim of this paper is to study numerically asymptotic manifolds and homoclinic solutions to the regular precessions of a rigid symmetric satellite in a circular orbit.  相似文献   

Effect of weather conditions on the incidence of Lophodermium yellow needle blight in the dwarf mountain pine in the Karkonosze and Izerskie Mountains (Poland)     

Wojciech PUSZ  Ryszard WEBER  Andrzej DANCEWICZ  W?odzimierz KITA 《山地科学学报》2016,13(4):725-733

The study aimed to determine, by using a statistical model, the effect of weather conditions on the incidence of Lophodermium yellow needle blight causing by new species for science- Lophodermium corconticum, in the mountain dwarf pine growing in the subalpine Karkonosze Mountains and the Izerskie Mountains(Poland). Needles showed symptoms of yellow spots, gradual discolouration and premature fall in July. The assessment of healthiness of infected mountain dwarf pine needles spanned three years(2011- 2013) and was conducted in several test sites in the Karkonosze and Izerskie Mountains. The results were analyzed by taking into account the meteorological conditions. Field observations seem to indicate that the highest infestation of mountain dwarf pine occurs in June and July, while September and October see a significantly lower disease index in the Karkonosze Mountains. The lower indices of the infestation of mountain dwarf pine are characteristic for the vegetation in the Hala Izerska high mountain pasture; whereas the environmental conditions prevailing in the Kocio? Ma?ego Stawu cirque and above the Samotnia hostel are conducive to the development of Lophodermium yellow needle blight.  相似文献   

Composition of a carbonatitic melt in equilibrium with lherzolite at 5.5–6.3 GPa and 1350°C     

A. N. Kruk  A. G. Sokol  D. A. Chebotarev  Yu. A. Palyanov  N. V. Sobolev 《Doklady Earth Sciences》2016,467(1):303-307

Generation of ultra-alkaline melts by the interaction of lherzolite with cardonatites of various genesis was simulated at the P–T parameters typical of the base of the subcratonic lithosphere. Experiments with a duration of 150 h were performed at 5.5 and 6.3 GPa and 1350°C. The concentrations of CaO and MgO in melts are buffered by the phases of peridotite, and the concentrations of alkalis and FeO depend on the composition of the starting carbonatite. Melts are characterized by a low (<7 wt %) concentration of SiO₂ and Ca# from 0.40 to 0.47. It is demonstrated that only high-Mg groups of carbonatitic inclusions in fibrous diamonds have a composition close to that of carbonatitic melts in equilibrium with lherzolite. Most likely, the formation of kimberlite-like melts relatively enriched in SiO₂ requires an additional source of heat from mantle plumes and probably H₂O fluid.  相似文献   

Orbit calculations near by the equilibrium points by a discrete mechanics method     

Jerzy Albrycht  Andrzej Marciniak 《Celestial Mechanics and Dynamical Astronomy》1981,24(4):391-405

Basic formulas of discrete mechanics in a rotating frame of references are obtained. Its application to several computer examples of orbits near by the equilibrium points of the Earth-Moon system are presented, and—for computational purposes—an algorithm is given.  相似文献   

Feeding habits of demersal fish in Icelandic waters: a multivariate approach     

Jaworski  Andrzej; Ragnarsson  Stefan Aki 《ICES Journal of Marine Science》2006,63(9):1682-1694

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The effect of area closures on the demersal fish community off the east coast of Iceland     

Jaworski  Andrzej; Solmundsson  Jon; Ragnarsson  Stefan Aki 《ICES Journal of Marine Science》2006,63(5):897-911

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