BrzezinSki M.,University of Warsaw |
Marzec M.,University of Wrocllaw |
Zmihorski M.,Polish Academy of Sciences
Folia Zoologica | Year: 2010
Invasive American mink and native polecats were live-trapped over a period of six years and radio-tracked during one winter-spring season in the lakeside habitats in NE Poland. The number of mink declined whereas number of polecats was stable during 1995-2000, however, except during one winter, mink were always more abundant in the study area than polecats. Significant differences in habitat utilization between radio-collared mink and polecats were observed. Mink moved only along the lake shoreline and showed no seasonal shift in habitat selection. In winter, polecats were most frequently located close to the lake banks, but they also stayed in barns and stables. In spring, they moved further from the lakes. There was considerable interspecies overlap of mink and polecat home ranges in February, and common use of the banks of the 500 m long unfrozen canal was recorded for 4 mink and 5 polecats. The pattern of daily activity of polecat and mink differed: mink were most active at dawn and in early morning whereas polecats at dusk and in beginning of the night. Individuals of both species coexisted in this small area at relatively high densities and to some degree exploited the same habitats, particularly in the vicinity of sites with access to open water.
Cianfrani F.,University of Wrocllaw |
Montani G.,University of Rome La Sapienza |
Montani G.,ENEA |
Scopelliti V.,University of Rome La Sapienza |
Scopelliti V.,Leiden University
Modern Physics Letters A | Year: 2016
We propose a modified gravitational action containing besides the Einstein-Cartan term some quadratic contributions resembling the Yang-Mills Lagrangian for the Lorentz spin connections. We outline how a propagating torsion arises and we solve explicitly the linearized equations of motion on a Minkowski background. We identify among torsion components six degrees of freedom: one is carried by a pseudo-scalar particle, five by a tachyon field. By adding spinor fields and neglecting backreaction on the geometry, we point out how only the pseudo-scalar particle couples directly with fermions, but the resulting coupling constant is suppressed by the ratio between fermion and Planck masses. Including backreaction, we demonstrate how the tachyon field provides causality violation in the matter sector, via an interaction mediated by gravitational waves. © 2016 World Scientific Publishing Company.
Matusiak-Malek M.,University of Wrocllaw |
Puziewicz J.,University of Wrocllaw |
Ntaflos T.,University of Vienna |
GreGoire M.,French National Center for Scientific Research |
And 2 more authors.
Journal of Petrology | Year: 2014
Miocene basanite from Krzeniów (SW Poland, eastern part of Cenozoic Central European Volcanic Province) contains scarce, small (usually <4 cm in diameter) spinel harzburgite and dunite mantle xenoliths. Two groups are defined based on the forsterite (Fo) content in olivine: group A (Fo90.4-91.7) and group B (Fo88.0-89.8). Both group A and B rocks are either clinopyroxenefree or clinopyroxene-poor. The group A orthopyroxene (mg# 0.91-0.92) is Al-poor and strongly light rare earth element (LREE) depleted [(La/Lu)N<0.42]. The mg# of group A clinopyroxene varies from 0.92 to 0.94 and is negatively correlated with its Al content. The trace element compositions of clinopyroxene define two patterns: A1, U-shaped [(La/Lu)N=20.23-64.73]; A2, almost linear LREE enriched [(La/Lu)N=11.91-14.00]. The group B orthopyroxene is also Al poor and LREE depleted [(La/Lu)N=0.03-0.04], but its mg# is lower than that in group A orthopyroxene (0.90-0.92).The mg# of group B clinopyroxene (0.90-0.92) is lower than that in group A, whereas theAl content is similar. The REE patterns of group B clinopyroxene mimic those of subgroup A2 [(La/Lu)N=5.64-11.30]. The group A harzburgites and dunites represent spinel-facies lithospheric mantle that underwent metasomatism by CO2-bearing silicate melts subjected to chromatographic fractionation. Locally carbonatite-silicate immiscible melts were generated. The peridotites in the distal parts of the chromatographic system were little affected by metasomatism and preserve much of their pre-metasomatic, depleted characteristics. The group B rocks are similar to those of group A except for the lower mg# of orthopyroxene and olivine. They were affected by percolating alkaline silicate melt undersaturated in clinopyroxene, which lowered the mg# of the olivine and orthopyroxene ('Fe metasomatism'). The A and B peridotites are representative of the Miocene lithospheric mantle close to the margins of the neighbouring Eger Rift. © The Author 2014. Published by Oxford University Press. All rights reserved.
Kieronski E.,University of Wrocllaw |
Michaliszyn J.,University of Wrocllaw |
Pratt-Hartmann I.,University of Manchester |
Tendera L.,University of Opole
SIAM Journal on Computing | Year: 2014
We consider the satisfiability and finite satisfiability problems for extensions of the two-variable fragment of first-order logic in which an equivalence closure operator can be applied to a fixed number of binary predicates. We show that the satisfiability problem for two-variable, first-order logic with equivalence closure applied to two binary predicates is in 2-NExpTime, and we obtain a matching lower bound by showing that the satisfiability problem for two-variable first-order logic in the presence of two equivalence relations is 2-NExpTime-hard. The logics in question lack the finite model property; however, we show that the same complexity bounds hold for the corresponding finite satisfiability problems. We further show that the satisfiability (= finite satisfiability) problem for the two-variable fragment of first-order logic with equivalence closure applied to a single binary predicate is NExpTime-complete. © 2014 Society for Industrial and Applied Mathematics.
Galek G.,University of Wrocllaw |
Sobik M.,University of Wrocllaw |
Blas M.,University of Wrocllaw |
Polkowska Z.,Technical University of Gdansk |
Cichala-Kamrowska K.,Technical University of Gdansk
Pure and Applied Geophysics | Year: 2012
In this study, the influence of traffic intensity on dew formation efficiency and chemistry is presented. The measurements were conducted near the A4 motorway in SW Poland in almost flat land relief with intense agricultural activity. The dew/hoarfrost was collected by means of insulated plain passive radiative condensers at three sites: AN and AS located in the close vicinity of the motorway (30 m) on the opposite sides of the road, and AR, representing rural background conditions beyond the motorway influence. Measurements were conducted in two short campaigns in April and September 2009 with 9 and 10 collection days respectively. The average daily efficiency of dew formation was 0.179 L/ m 2. Its value for AN, AS and AR was on average 0.170, 0.199 and 0.173 L/m 2, respectively. The efficiency of dew formation at measurement sites located on both sides of the road differed by up to about 200% during an individual dew episode. Maximum daily value reached 0.389 L/m 2. The average volume-weighted pH was acidic and ranged from 4.29 (AS) to 4.58 (AR). The electric conductivity (EC) at all measurement sites was relatively low reaching on average 55.9 μS/cm for AN, 62.2 μS/cm for AS and 35.8 μS/cm for AR. The average volume-weighted TIC parameter (total ionic content) reached the value of 0.62 meq/L (AN and AS) and 0.38 meq/L (AR). Both EC and TIC values indicated strong influence of the motorway at sites located in its close vicinity (AN and AS). Depending on airflow direction during individual dew collection events, AN or AS sites were situated alternatively on windward or leeward side of the road, which distinctly influenced dew formation and chemistry: the leeward condenser was characterized by smaller water volume, higher EC and higher TIC when compared both with its windward counterpart and the background site. The ionic structure of the collected samples was similar at all measurement sites. The largest share had NO 3 - anion (28-32%) and Ca 2+ cation (22-25%). Thus, air pollution was relatively low in the vicinity of the A4 motorway in SW Poland not exceeding the typical values for urban background stations. © 2011 Springer Basel AG.