We propose the time slot routing, a novel routing scheme that allows for a simple design of interconnection networks. The simulative results show that the proposed scheme demonstrates optimal performance at the maximal uniform network load, and for uniform loads the network throughput is greater than for deflection routing.

The aim of the study was to assess the content of soluble forms of fertilizer nutrients (N, P, K) in the cultivated soil layer up to 20 cm deep from agricultural land in the river valley, and the concentration of these nutrients in the surface wa-ters of the Raszynka River.

In the years 2016–2017, the surface water samples from the Raszynka Rriver (17 points) and soil (19 points) were col-lected from agricultural areas near the Raszynka River.

The surface water samples were collected once a month during the March–October 2016–2017. The contents of nitro-gen (Ntot, NO3-N and NH4-N), phosphorus (Ptot, PO4-P), total organic carbon (TOC and K and Ca) in soils and in waters were determined in the sample solutions.

It was shown that river water was of low quality due to the high concentration of nitrogen and phosphorus and electri-cal conductivity (EC). The most polluted were the waters of the lower section of the river located in the vicinity of arable land and agricultural built-up areas. The soluble forms of nutrients content in the cultivated soil layer was varied dependingon the kind of nutrient, way of agricultural land use, and the term of soil sampling. The content of dissolved P forms in the soil was the highest in autumn on arable lands after harvesting of vegetables (GO-W: 10.24 mg Ptotꞏkg–1 in D.M.) and this component may migrate with surface runoff and increase the risk of surface water eutrophication.

Gas atmosphere at the sand mould/cast alloy interface determines the quality of the casting obtained. Therefore the aim of this study was to measure and evaluate the gas forming tendency of selected moulding sands with alkyd resins. During direct and indirect gas measurements, the kinetics of gas evolution was recorded as a function of the temperature of the sand mixture undergoing the process of thermal destruction. The content of hydrogen and oxygen was continuously monitored to establish the type of the atmosphere created by the evolved gases (oxidizing/reducing). The existing research methodology [1, 7, 8] has been extended to include pressure-assisted technique of indirect measurement of the gas evolution rate. For this part of the studies, a new concept of the measurement was designed and tested.

This article presents the results of measurements and compares gas emissions from two sand mixtures containing alkyd resins known under the trade name SL and SL2002, in which the polymerization process is initiated with isocyanate. Studies of the gas forming tendency were carried out by three methods on three test stands to record the gas evolution kinetics and evaluate the risk of gas formation in a moulding or core sand.

Proprietary methods for indirect evaluation of the gas forming tendency have demonstrated a number of beneficial aspects, mainly due to the ability to record the quantity and composition of the evolved gases in real time and under stable and reproducible measurement conditions. Direct measurement of gas evolution rate from the tested sands during cast iron pouring process enables a comparison of the results with the results obtained by indirect methods.

Czteroletnie badania indywidualnie testowanej grupy dzieci niewidomych od urodzenia, uczących się we Wrocławiu w Ośrodku Szkolno-Wychowawczym Dzieci Niewidomych pozwoliły sformułować szereg wniosków dotyczących użyteczności metody sonorycznej w różnych grupach wiekowych. Oprócz ocen dokładnościowych, w pracy przedstawiono ważne dla przyszłych zastosowań parametry ergonomiczne. Zastosowanie metody w procesie audio -kinestetycznego wychowania przedszkolnego i edukacji szkolnej ma na celu rozszerzenie poznania dotykowego kształtu, wielkości i układu realnych obiektów i modeli o poznanie multisensoryczne.

The paper presents the results or the integrated assessment or environmental and human health impacts or emissions released from different sectors in Poland. The analysis was performed with the use or the curelian emissions transport model POLAIR 31) and the Regional Air Pollution Information and Simulation model RAINS. The models arc briefly described. At present, this hybrid system can operate in a simulation mode and enables estimation or the emission and concentration/deposition levels or main air pollutants, emission control costs, environmental impacts and external costs associated with different energy scenarios. Emission levels or main air pollutants in 2005, 20 I O and 2020 arc presented lor the selected energy scenario. Associated external costs and impacts on acidification have been estimated.