Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 6
items per page: 25 50 75
Sort by:

Abstract

The article presents empirical material obtained in sociological surveys conducted in the Wejherowo area in the year 2014. The purpose of the survey was to record the residents’ opinions on the needs and problems relating to selected functioning aspects of the town and its downtown district, the perception and valuation of the area, the town’s revitalization investments, both planned and in progress, and the perception of the changes taking place in selected spheres of the town’s life. The survey reveals that the dwellers of Wejherowo are capable of responding to the problems the town faces in intellectual and personal dimensions, they follow the postulates related to the ideas and concepts of a creative town more or less consciously, and have a preference for the town ensuring access to the broadly construed culture and entertainment. This encapsulates a vision of developing town cultures, with the focal point evidently shifted from the concept of a town as a place accumulating specimens of architecture and a symbolic space to the town construed as a complex of better facilities and solutions which make everyday life more convenient. More frequently than ever before, town identity becomes the function of negotiations between what is local and what is global. The quality of town life and the features of its ‘town-like character’ appear to be the outcome of continuous and subtle dialectics between the residents and the physical form in which they live, i.e. the town.
Go to article

Abstract

European beaver (Castor fiber), the largest rodent species inhabiting a wide area of Eurasia, feeds mainly on dry parts of plants, bark or wood. Such kind of nourishment needs to be properly digested in each part of the gastrointestinal tract. The time of stomach digestion, which directly influences all the following steps of the digestion process, is precisely controlled by the pylorus and its innervation. However, virtually no data is available on the organization of the enteric nervous system in most of the wild animal species, including beavers. On the other hand, a pecu- liar diet consumed by beavers, suggests that the arrangement of their stomach intramural nerve elements can be atypical. Therefore, the present study investigated the distribution and chemical coding of neurons and nerve fibers in the pylorus of the European beaver. The experiment was performed on stomachs obtained from a group of 6 beavers caught in Northeastern region of Poland (due to beaver overpopulation). Pyloric wall tissue cryosections were double immunostained with a mixture of antibodies against pan-neuronal marker PGP 9.5 (to visualize enteric neurons) and ChAT (cholinergic marker), nNOS (nitrergic marker), SP, CGRP, Gal (peptidergic markers). Confocal microscopy analysis revealed that the majority of enteric nerve cells were clustered forming submucosal and myenteric ganglia and all the studied substances were expressed (in various amounts) in these neurons. We conclude, that the anatomical arrangement and chemical coding of intramural nerve elements in the beaver pylorus resemble those found in other mammalian species.
Go to article

Abstract

The paper presents a multi-scale mathematical model dedicated to a comprehensive simulation of resistance heating combined with the melting and controlled cooling of steel samples. Experiments in order to verify the formulated numerical model were performed using a Gleeble 3800 thermo-mechanical simulator. The model for the macro scale was based upon the solution of Fourier-Kirchhoff equation as regards predicting the distribution of temperature fields within the volume of the sample. The macro scale solution is complemented by a functional model generating voluminal heat sources, resulting from the electric current flowing through the sample. The model for the micro-scale, concerning the grain growth simulation, is based upon the probabilistic Monte Carlo algorithm, and on the minimization of the system energy. The model takes into account the forming mushy zone, where grains degrade at the melting stage – it is a unique feature of the micro-solution. The solution domains are coupled by the interpolation of node temperatures of the finite element mesh (the macro model) onto the Monte Carlo cells (micro model). The paper is complemented with examples of resistance heating results and macro- and micro-structural tests, along with test computations concerning the estimation of the range of zones with diverse dynamics of grain growth.
Go to article

This page uses 'cookies'. Learn more