Bartkowiak A.,University Technologiczno Przyrodniczy dgoszczy |
Lemanowicz J.,University of Technology and Life Sciences in Bydgoszcz
Scientific Review Engineering and Environmental Sciences | Year: 2014
The paper presents the results on the effect of uncontrolled garbage damps located on sandy soils of the Kujawy and Pomorze Province on the content of phosphorus and selected heavy metals (Zn, Cu, Ni and Cr) assayed in the extract of 0.01 M CaCl2. It was found that illegal damping resulted in the changes in the physicochemical properties of the soils analysed. In the soil surface horizons waste 100 m distance from the waste dump there were higher contents of organic carbon, phosphorus and cooper. The waste stored in the area of the damps investigated did not show a considerable effect on the contamination of soils with heavy metals and their content was connected with the biogeochemical cycle in nature. The analysis of variance showed a significant effect of the factors studied (objects and soil sampling depth) on the changes in the content of Corg, P, Zn, Cu, Cr as well as Ni. High values of the coefficients of variation (CV%) of the parameters showed a high heterogeneity of the results. With the factors applied the content of the heavy metals assayed comes in a following series: Cr > Zn > Ni > Cu.
Bielinski M.,University Technologiczno Przyrodniczy dgoszczy |
Muzyczuk P.,Centrum Onkologii W Bydgoszczy
Polimery/Polymers | Year: 2011
Studies on the blow molding processing and selected compression properties of thermoplastic polymers have been presented. The compression strength of polypropylene (PP) obtained in the extrusion blow molding process with 0 ÷ 2 wt. % content of blow agents of endothermic decomposition character has been determined (Fig. 5). Samples of dimensions h-30mm andφ- 20 mm, (Figs. 1 and 2) were subjected to compression in a test apparatus (Fig. 3) under steady loading/unloading cycles (dual ramp) in the 0 ÷ 30 kN range and also in a stepwise loading/unloading procedure (every 5 kN with breaks) in the 0 ÷ 25 kN range (Fig. 4). The performance of selected polymeric products were determined on the basis of stress/strain curves and the following determined relations: the dependence of strain of the studied samples on the static load values obtained for various amounts of blowing agent feed (Figs. 6-11), Young's compressive modulus on the amount of blowing agent (Fig. 12) and also work done during the compression on the amount of blowing agent (Fig. 13). The dependence of the relative deformation of porous PP on the increase in values of the parameters of steady loading/unloading cycles was also determined.
Kuciel S.,Warsaw University of Technology |
Liber-Knec A.,University Technologiczno Przyrodniczy dgoszczy |
Zajchowski S.,University Technologiczno Przyrodniczy dgoszczy
Polimery/Polymers | Year: 2010
The processing by reactive extrusion method of composites based on virgin polypropylene and its recyclates filled with fibers of jute, sisal, hemp or cottonized flax has been presented (Tables 1 and 2). The influence of the addition of three different compatibilizers and fiber alkalization on the properties of the obtained materials was evaluated. The basic mechanical and process properties (Tables 3, 4, Figs. 2 - 13) as well as water absorption (Fig. 1) were determined and the influence of cyclic loading on them estimated. The potentials and applicability of these composites were also presented.
Makarewicz E.,University Technologiczno Przyrodniczy dgoszczy |
Shyychuk I.,University Technologiczno Przyrodniczy dgoszczy |
Mroczynska K.,University Technologiczno Przyrodniczy dgoszczy
Polimery/Polymers | Year: 2016
The study on thermal stability of polyvinyl chloride (PVC) plastisols gelled at temperatures 140 and 160 °C was carried out. Four different PVCs were used: PVC E-68 (Poland), Pevikon P-682 (Sweden), Slovinyl EP-702 (Slovakia) and Vestolit B-7021 Ultra (Germany). Four plasticizers were applied: di-2-ethylhexyl phthalate (DOP), 1,2-cyclohexanedicarboxylic acid diisononyl ester (Hexamoll DINCH), dipropylene glycol dibenzoate (S-9100) and dioctyl adipate (DOA). The morphology and size distribution of polymer particles were studied with confocal microscopy. ATR-FTIR spectra of the gelled plastisols were recorded, indicating the formation of multiple bonds, ester and ether bond as well as oxygen-containing groups. Thermal stability of the plastisols was evaluated by means of thermogravimetry in air atmosphere. The effects of degradation processes occurring during the gelation of plastisols on the temperatures of initial and final decomposition as well as maximum rate of PVC decomposition were assessed. It was found that the changes in the gelled plastisol membranes depend essentially on the poly(vinyl chloride) type and to a lesser extent on the plasticizer used.
Flizikowski J.,University Technologiczno Przyrodniczy dgoszczy |
Sadkiewicz J.,University Technologiczno Przyrodniczy dgoszczy
Polimery/Polymers | Year: 2015
The dependence between structural geometrical and dynamic parameters in the working zone of the screw plasticizing unit has been discussed. Anew approach to the construction criteria and features, states and changes of pressure, forces and torques in the plasticizing section of the screw working zone, taking into account its active and passive sides, has been proposed. Based on the description of dependencies and analysis of process variable indicators an assessment of states and changes of pressure, forces and torques in the plasticizing zone has been made.
Wsn networks with hot potato protocol for automatic meter reading systems: Methods of analysis based on graph theory [Protokół hot potato w sieciach wsn przeznaczonych do odczytu liczników: metoda analizy w oparciu o elementy teorii grafów]
Dubaiski B.,University Technologiczno Przyrodniczy dgoszczy |
Kiedrowski P.,University Technologiczno Przyrodniczy dgoszczy
Rynek Energii | Year: 2010
Analytic method for sensor network analysing, which nodes communicate using of Hot Potato protocol is presented in this paper. Although the use of the method is explained on the example of seven-nodal network, the presented method has no limit to the number of nodes in the network. It was explained, why Hot Potato protocol can be used in WSN networks as primary or backup protocol. Wireless access network of telemetry system was treated by the Authors as a special case of WSN network.
Bielinski K.S.,University Technologiczno Przyrodniczy dgoszczy |
lodzimierzBielinski W.,University Technologiczno Przyrodniczy dgoszczy
Rynek Energii | Year: 2010
The paper presents the characteristics of the procedures of emergency restrictions in the situation of electric power deficit in the power system (KSE). They are implemented as off-line MV dispatching. The paper indicates the need of procedures testing and verification with including not only a criterion of effectiveness, but also with taking into account the criterion of minimizing costs of losses, which are incurred by customers due to unexpected power failure, and failure of electricity.
Bielinski K.S.,University Technologiczno Przyrodniczy dgoszczy
Rynek Energii | Year: 2012
The study presents general concept of active monitoring as a tool supporting energy management. The paper indicates difference between active and passive monitoring, it also asserts significance of active monitoring for effective energy management.
Zoltowski M.,University Technologiczno Przyrodniczy dgoszczy |
Martinod R.M.,EAFIT University
Multidiscipline Modeling in Materials and Structures | Year: 2015
Purpose - The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach - The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings - The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value - The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques. © Emerald Group Publishing Limited.
Effect of cultivation intensity on the content and distribution of phosphorus and heavy metals in selected soil profiles of luvisols [Wpływ intensywności uprawy roślin na zawartość i rozmieszczenie fosforu oraz metali ciêzkich w wybranych profi lach gleb płowych]
Lemanowicz J.,University Technologiczno Przyrodniczy dgoszczy |
Bartkowiak A.,University Technologiczno Przyrodniczy dgoszczy
Scientific Review Engineering and Environmental Sciences | Year: 2013
The paper presents the results of research into the total content of phosphorus and its selected forms against the chemical properties of Luvisol due to plant growing technologies applied: medium intensive (sI) and intensive (sII) technologies. In the soil the following were determined: pH in KCl, total organic carbon (TOC), total phosphorus (Pog), organic phosphorus (Porg), mineral phosphorus (Pmin), content of CaCO 3, as well as the total contents of Zn, Cu and Ni, Pb, Cr. It was found that the plant growing technologies applied changed the reaction, total organic carbon, phosphorus and its forms. The macronutrients for the plants were more favourable in the soil with the medium intensive growing technologies used. The value of the ratio Corg : Porg in the soil horizons of profi le sI was higher than in the horizons of profi le sII, which demonstrates a lower rate of mineralization of organic phosphorus bonds. The highest content of the zinc, copper, nickel, chrome and lead investigated was recorded in horizons B of the profi les studied, which was determined by the process of soil washing. Drawing on the distribution index (DI) calculated, there was identifi ed an anthropogenic effect on the distribution of total phosphorus and its forms in the soil profi les investigated.