Parsec-scale Faraday rotation distribution in the BL Lac object 1803+784

We present the results of VLBI polarization observations of the BL Lac object 1803+784 made simultaneously at 22, 15, 8 and 5 GHz in 1997 April, and quasi-simultaneously at 1.6 and 5 GHz in 1998 July. These data have yielded the total intensity, polarization, spectral-index, and rotation-measure distributions on scales from less than 1 mas to about 30 mas from the core (from a projected distance of about 1-150 pc at the redshift of 1803+784). There is an enhancement in the rotation measure for the VLBI core, clearly due to plasma in the immediate vicinity of the AGN. The rotation measures 10-30 mas from the core demonstrate that the Galactic contribution to the total observed rotation measures is equal to the previously reported integrated rotation measure (-61 rad m(-2) ). After subtracting this Galactic contribution and multiplying by (1 +z )(2) , the rotation measure for the VLBI core in the source rest frame is about 500 rad m(-2), similar to the VLBI core rotation measures reported previously for BL Lac and several quasars

Spatial patterns of the school elections in Sweden

Talking about school elections implies a talk about an experiment which allows teenagers to familiarize themselves with their country’s electoral culture. It also provides an opportunity to learn about candidates, political parties, political debates, and electoral process in general. These «experimental elections» have been taking place in Sweden since the end of the XX century. Nowadays, most of school students participate in the school elections. The results of this voting can be analysed as well as the results of common elections except the fact of analysing electoral preferences of small and relatively homogeneous group. In this particular article school elections that had taken place in Sweden in 2018 were analysed as a spatial process. Final results of voting are quite close to those that can be seen in common elections though spatial diversity varies. The results of school elections also show the increasing role of contextual (neighbourhood) effect comparing to «adult» elections and brings out an unexpectedly high difference in electoral behaviour between students of schools and those who study in colleges.</jats:p

Numerical investigation of pulverized coal aero mixture combustion at the presence of flow swirling

Numerical investigation results of burning pulverized coal aero mixture in the presence of swirl flow have been presented. The mathematical model has been chosen allowing describing correctly the pulverized coal combustion processes in the furnace with a swirl burner

Numerical investigation of pulverized coal aero mixture combustion at the presence of flow swirling

Numerical investigation results of burning pulverized coal aero mixture in the presence of swirl flow have been presented. The mathematical model has been chosen allowing describing correctly the pulverized coal combustion processes in the furnace with a swirl burner