2014 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2014

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THE METHOD OF ANALYSIS OF DAMAGE REINFORCED CONCRETE BEAMS USING TERRESTRIAL LASER SCANNING
- Krystyna Nagrodzka-Godycka
- Jakub Szulwic
- Patryk Ziółkowski
2014
The authors present an analysis of the possibility to assess deformations and mode of failure of R-C beams using terrestrial laser scanning. As part of experiments carried out at the Regional Laboratory of Construction (at Gdansk University of Technology), reinforced concrete beams were subjected to destruction by bending and by shear. The process of press impact on the reinforced concrete beam was recorded using terrestrial laser scanner. Development of scanning effects was performed using Leica Cyclone software and MeshLab. In order to verify results, the independent recording of beam deflection with use of extensometer and the recording with non-meter synchronous digital cameras were carried out, photos from these cameras were subjected to photogrammetric processing. However, the principal subject of this paper is to show the usefulness of laser scanning for the analysis of reinforced concrete beams damages and authors of this paper focused on this subject. In the description of the experiment there are six stages of measurement mentioned for the reinforced concrete beam: from the zero condition (no force), through intermediate conditions up to the stage of destruction. Scanning was performed from one stable measurement station to avoid in processing the effect of correlation errors (matching and linking) of ScanWorld. Analysis of the materials from laser scanning allowed to assess the geometry of element subjected to destruction with an accuracy not worse than 1 mm. For this purpose, the method of spheres translation was developed and in its characteristic groups of points from scanning the spheres were described. Spheres centers grew to be geometrical element to be assessed on scans in subsequent measurement epochs. Additionally, through the use of automated analysis of intensity map of laser light reflection, it was indicated the possibility of rapid identification of the beam, in which there may occur microcracks and changes in the structure. The usefulness of the evaluation mechanism can be appreciated in the mass studies or inspective examinations of constructional components. As a result of the authors’ research and in the course of measurements analysis it was possible to establish the concise procedure to specify the mode of the reinforced concrete destruction and it was defined the minimum size of cracks that may be recorded in the cloud of points from laser scanning.
The Methodology of identifying the place to install shunt compensators in the transmission network
- Robert Małkowski
- Robert Kowalak
- Ryszard Zajczyk
- Artur Zbroński
2014
This methodology of selection and localization of static com- paper presents pensators in wide network. Proposed method is based on analysis of voltage area power profiles in the nodes of the power grid, and designating locations, In Which Voltages ex- cessively tend to change in time. Practical way of modeling the SVC device in PLANS program you Presented, as well as some example results of research.
The methods of secure data transmission in the KNX system
- Michał Porzeziński
2014 Journal of Polish Safety and Reliability Association, Summer Safety and Reliability Seminars
The article presents the demands concerning data security in distributed building automation systems and shows the need for providing mechanisms of secure communication in the KNX system. Three different methods developed for KNX data protection are discussed: EIBsec, KNX Data Security and the author's method. Their properties are compared and potential areas of application are presented.
The modelling method of discrete-continuous systems
- Rafał Hein
2014 Pełny tekst Vibrations in Physical Systems
The paper introduces a method of discrete-continuous systems modelling. In the proposed method a three-dimensional system is divided into finite elements in only two directions, with the third direction remaining continuous. The thus obtained discrete-continuous model is described by a set of partial differential equations. General difference equations of discrete system are obtained using the rigid finite element method. The limit of these equations leads to partial differential equations. The derived equations, expressed in matrix form, allow for the creation of a global matrix for the whole system. The equations are solved using the distributed transfer function method. Proposed approach is illustrated with the example of a simple beam fixed at both ends.
The occurrence of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in the chosen area of Svalbard
- Aneta Pacyna-Kuchta
- Krystyna Kozioł
- Marek Ruman
- Żaneta Polkowska
2014
In the recent years, scientists have been paying more attention to the impact of compounds of anthropogenic origin on the environment. Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) are both groups of stable organic compounds, difficult to biodegrade, and potentially toxic. Because of their affinity to lipids, they can accumulate in fat tissue and exert influence on animal health. This paper present levels of PAHs and PCBs in abiotic samples derived from Svalbard on Arctic.
THE ONLINE APPLICATION AND E-LEARNING IN THE COMPETENCE-BASED MANAGEMENT IN PUBLIC ADMINISTRATION ORGANIZATIONS
- Beata Basińska
- Izabela Wiciak
2014
The integration of effective management of work-related processes and utilization of human resources potential leads to the development of organization. The purpose of this paper was to examine how the principles of competences-based management can be introduced to enhance organization’s effectiveness in human resources management. A model of assessment and development of competences-based management, embracing an online application and e-learning has been designed. The project refers to managers of the Polish police. The project involved three groups of activities: a model of competences-based management, online application for the system assessment and development of managerial competencies, training modules on an e-learning platform. The model of competences-based management using the online platform integrates the human resources management with the results of work and the accomplishment of key processes.
The Optical Transport Network Control Based on SDN Architecture
- Marcin Czajkowski
- Artur Gorczyca
- Sylwester Kaczmarek
- Krzysztof Szałajda
- Paweł Kaczmarek
2014
The aim of this publication is to present research results on the usability of the Software-Defined Networking concept to control transport networks. For this purpose, an easy-to-use connection scheduler was developed capable of controlling connections in optical transport networks. The authors would like to present this solution and details of constructed SDN architecture implemented for modern optical transport solutions based on ADVA Optical Networking’s products. The results of testing the implemented applications and the created SDN architecture will also be presented.
The optimal mixture of Toxoplasma gondii recombinant antigens (GRA1, P22, ROP1) for diagnosis of ovine toxoplasmosis
- Lucyna Holec-Gąsior
- Bartłomiej Ferra
- Elżbieta Hiszczyńska-Sawicka
- Józef Kur
2014 VETERINARY PARASITOLOGY
Toxoplasmosis, caused by Toxoplasma gondii, is the major parasitic disease affecting sheep. Infection not only results in significant reproductive losses in these animals, but has public health implications since consumption of infected meat can facilitate zoonotic transmission. Although several serological tests are currently used for diagnosis of ovine toxoplasmosis, production of reliable reagents is a constraint and therefore there is a need to develop new diagnostic tools. In this paper, we assess for the first time, the preliminary diagnostic utility of 19 T. gondii recombinant antigens (GRA1, GRA2ex2, GRA4, GRA5, GRA6, GRA9, SAG1, SAG4, BSR4, P22, ROP1, P36, MIC1ex2, MIC1ex34, MIC3, MAG1, BAG1, LDH1, and LDH2) in immunoglobulin G (IgG) enzyme-linked immunosorbent assays (IgG ELISAs). Following an initial evaluation, eight recombinant antigens (GRA1, GRA9, SAG1, SAG4, P22, MIC1ex2, MIC3, ROP1) were chosen for subsequent testing and comparison against the native Toxoplasma lysate antigen (TLA) in IgG ELISAs using 88 sera from naturally infected sheep and 20 sera from healthy animals. The reactivity of these antigens was variable with the best results for GRA1, P22, ROP1 and TLA. High sensitivity and specificity (100%) was noted for GRA1, ROP1 and TLA; P22 showed a slightly lower sensitivity (98.9%) but the same high specificity (100%). Four different combinations of these antigens (M1: GRA1 + ROP1; M2: GRA1 + P22; M3: P22 + ROP1; M4: GRA1 + P22 + ROP1) were tested against the same pool of ovine sera; all IgG-positive serum samples were detected by all of the mixtures. However, the most effective for diagnosis of toxoplasmosis in sheep, based on the highest absorbance values, was the mixture M4 containing three proteins. High sensitivity and specificity (100%) was observed from tests containing either M4 or TLA antigens with a new pool of sera (93 seropositive and 35 seronegative). Thus, the present study shows that a cocktail of GRA1 + P22 + ROP1 recombinant proteins can be used to diagnose T. gondii infection in sheep, and consequently will assist in epidemiological studies.
The Pomerania Design Faktory as an Example of 50+ Entrepreneurship Promotion
- Beata Krawczyk-Bryłka
2014
The article presents one of the programmes carried out by The Gdańsk Entrepreneurs' Foundation and The Gdansk Labor Office in 2013/14, dedicated to seniors. It is a great example of an innovative project aimed at the activation of individuals aged 50+ by using their own talents and interests in business. It also shows the results of intergenerational cooperation because the trainers — especially the designers — were much younger than the beneficiaries. The aims of the project are presented and the recruitment procedures and training schedule are described. The participants’ motivation and expectations are also mentioned. The results of the project are the participants’ own companies, the common brand and the Internet shop that offers their products, also mentioned in the article.
The porosity and morphology of PU foams prepared by solvent casting/salt leaching method with different solvents
- Michalina Mallach
- Helena Janik
- Justyna Kucińska-Lipka
2014
In this study, the polyurethane (PU) system based on poly(ethylene-butylene) adipate diol, 1,6-hexamethylene diisocyanate, 1,4-butanediol and ascorbic acid is used to prepare a foamed material. Polymer foams were created using solvent casting/salt-particle leaching (SC/PL) method. The influence of the PU concentration in different solutions [either in a DMF or in DMF with THF as a co-solvent] on the morphology and porosity of the foam was investigated. The PU foam prepared from a 10% solution in a DMF/THF mixture had the highest porosity value equal to 86% and the size of the pore was in a rage of 100–300 µm. Obtained foam meets the requirements of the scaffolds in terms of the porous structure.
THE POSSIBILITIES OF ESTIMATING THE RELIABILITY OF SHIP PIPELINES’ ELEMENTS INCLUDING DESTRUCTIVE PHENOMENA ACTING ON THEM
- Roman Liberacki
2014 Pełny tekst Journal of Polish CIMEEAC
In the article an approach to the problem of estimating reliability data based on physical models is proposed. The possibility of reliability assessment for selected elements of ship pipelines, based on the recognition of the destructive physical phenomena taking place in them, is discussed. To do this, an overview of these phenomena has been made. In addition, a preliminary review of existing measures of destruction of materials has been made to check their suitability for possible use them to solve a given problem. The article is an introduction to further, more detailed considerations.
The Possibility of Phase Change Materials (PCM) Usage to Increase Efficiency of the Photovoltaic Modules
- Ewa Klugmann-Radziemska
- Patrycja Wcisło-Kucharek
- Michał Ryms
- Hubert Denda
2014
Solar energy is widely available, free and inexhaustible. Furthermore this source of energy is the most friendly to the environment. For direct conversion of solar energy into useful forms like of electricity and thermal energy, respectively photovoltaic cells and solar collectors are being used. Forecast indicate that the first one solution will soon have a significant part in meeting the global energy demand. Therefore it is highly important to increase their efficiency in the terms of providing better energy conversion conditions. It can be obtain by designing new devices or by modifications of existing ones. This article presents general issues of photovoltaic installations exposed to work in high temperatures and basic concepts about phase change materials (PCMs). The paper presents the possibility of PCM usage to receive heat from the photovoltaic module. Specially designed test stand, consisting of PV module covered with a layer of PCM has been build and tested. Current-voltage characteristics of the cell without PCM material and with a layer of PCM have been presented. Authors also describe the results of the electrical and thermal characteristic of a coupled PV-PCM system.
The Possibility to use a Nuclear Power Plant as a Source of Electrical Energy and Heat
- Tomasz Minkiewicz
- Andrzej Reński
2014 Pełny tekst Acta Energetica
In this article issues concernig the possibility of nuclear power plant (NPP) operation also as a source of heat, which means combined heat and power production, have been described. CHP work is possible and profitable only in those areas where high thermal power demand occurs, which means near city agglomerations such as Warsaw or the Tri-City. Two levels of thermal power delivered to the heating system have been considered. Preliminary technical and economic studies regarding NPP location by Żarnowiec Lake have confirmed the NPP potential to work as a primary source of heat in the heating network system, which would feed the regions of Wejherowo and Gdynia.
The potential role of bisphenol A in the pathogenesis of polycystic ovary syndrome
- Aleksandra Rutkowska
- Kamila Wilczewska
- Łukasz Laczmański
- Justyna Kuliczkowska
- Agnieszka Lenarcik
- Anna Trzmiel-Bira
- Anna Brona
- Monika Kuligowska-Jakubowska
- Aleksandra Konieczna
- Agata Kot-Wasik
- Andrzej Wasik
- Andrzej Milewicz
- Jacek Namieśnik
- Dominik Rachoń
2014 Endocrine Abstracts
Polycystic ovary syndrome (PCOS) is the most common endocrinopathy in women of reproductive age, that lead to infertility, type 2 diabetes and coronary heart disease. Bisphenol A (BPA) is one of the most abundant chemicals produced worldwide and is used as a plasticizer in daily life. Nowadays it is also well know that it can interact with estrogen receptors, androgen receptors and peroxisome proliferatoractivated receptors g (PPARg). Therefore, the aim of this study was to identify the potential role of BPA in the pathogenesis of PCOS which is the most common endocrinopathy in premenopausal women. In total 137 women were studied. Sixty-six (mean age 24.5G3.66) were diagnosed with PCOS according to the ESHRE/ASRME (Rotterdam Criteria) consensus. The control group consisted of 71 women (mean age 28.4G4.22) without PCOS. Serum levels of prolactin (PRL), 17OH-progesterone, total testosterone, DHEA-S, insulin and sex hormone-binding globulin (SHGB) were measured. BPA concentrations were analysed in all women’s sera using HPLC method combined with mass spectrometry (HPLC-MS/MS analysis, The Agilent 1200 HPLC system). The results of the analysis have pointed to the higher levels of BPA in the sera of women with PCOS in comparison with healthy controls (median: 3.18 vs 1.73 ng/ml, PZ0.05). There has been a positive correlation between the serum concentration of BPA and total testosterone level (PZ0.004, RZ0.56). There were no correlations between serum BPA concentrations and waist circumference, BMI and serum PRL, DHEA-S, insulin. These results confirmed the hypothesis of higher levels of BPA in PCOS women, that can exacerbate the androgen production.
The Process of Building Civil Society against the Shortcomings of Polish Planning Legislation
- Tomasz Rozwadowski
2014
The article presents the main assumptions of the project of Coastal Strip development in Gdansk. According to the authors best knowledge this is the first pro publico bono project in Poland in a large area of the city formed on the initiative of and elaborated by the city's inhabitants supported by two NGOs. Successive stages of the project preparation are discussed on the background of the shortcomings of Polish planning law and the difficulties faced by the public participation process in terms of building civil society.
The properties of reduced Bi-Ge-O glasses for thermoelectric devices
- Beata Bochentyn
- Jakub Karczewski
- Maria Gazda
- Bogusław Kusz
2014 Pełny tekst Procedia Engineering
The bismuth-germanate glasses have been investigated to examine their applicability for thermoelectric devices. In order to increase their electrical conductivity, the 25Bi2O3–75GeO2 glass samples have been reduced at 340-380°C for 10 hours in hydrogen. It has been shown that such heat treatment in H2 leads to the reduction of metal ions Bi3+ and Ge4+ into neutral atoms and the formation of metal grains both in an amorphous glass matrix and on the glass surface. The bulk electrical conductivity of the reduced 25Bi2O3–75GeO2 sample measured at 100°C is ~ 2.6 Scm-1, whereas the Seebeck coefficient of this glass estimated in a temperature range 20-100°C in reference to Pt is α=(-57.5±0.5) μVK-1.
The properties of reduced Ge-Sb-O glasses for thermoelectric devices
- Beata Bochentyn
- Jakub Karczewski
- Maria Gazda
- Bogusław Kusz
2014 Pełny tekst Procedia Engineering
The structural and electrical properties of germanium-antimonate glasses after heat treatment in hydrogen have been determined. In the case of 50GeO2-50Sb2O3 glass reduced at 340°C even for less than 1 hour a continuous layer of antimony granules is formed and its electrical properties determine the surface conductivity of the reduced sample. The bulk electrical conductivity at 100°C of this sample was determined as 1000 Scm-1 and the Seebeck coefficient at this temperature in reference to Pt was found to be α=(17.2r0.5) μVK-1.
The Quick Measure of a Nurbs Surface Curvature for Accurate Triangular Meshing
- Aleksander Kniat
2014 Pełny tekst Polish Maritime Research
NURBS surfaces are the most widely used surfaces for three-dimensional models in CAD/CAE programs. As a model for FEM calculation is prepared with a CAD program it is inevitable to mesh it finally. There are many algorithms for meshing planar regions. Some of them may be used for meshing surfaces but it is necessary to take the curvature of the surface under consideration to avoid poor quality mesh. The mesh must be denser in the curved regions of the surface. Instead of analysing a surface curvature, the method to assess how close is a mesh triangle to the surface to which its vertices belong is presented in this paper. The distance between a mesh triangle and a parallel tangent plane through a point on a surface is the measure of the triangle quality. Finding the surface point which projection is located inside the mesh triangle and which is the tangency point to the plane parallel to this triangle is an optimization problem. Mathematic description and the algorithm to find the solution are presented in the paper.
The relationships between asphalt mix rutting resistance and MSCR test results
- Krzysztof Błażejowski
- Bohdan Dołżycki
2014
W publikacji przedstawiono badania wpływu rodzaju asfaltu na odporność i deformacje. Wykazano, że w przypadku betonów asfaltowych jest lepsza korelacja pomiędzy cechami asfaltów a odpornością na deformacje niż w przypadku mieszanek mineralno-asfaltowych o nieciągłym uziarnieniu.
The Relationships Between BTEX, NOx, and O3 Concentrations in Urban Air in Gdansk and Gdynia, Poland
- Mariusz Marć
- Bożena Zabiegała
- Vasil Simeonov
- Jacek Namieśnik
2014 CLEAN-SOIL AIR WATER
This paper presents the results of atmospheric air quality research conducted in the areas of two shipyard cities: Gdansk and Gdynia (Poland), in the period between March and December 2011. The purpose of the research was focused on determination of benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds in atmospheric air. Passive sampling technique, with Radiello® diffusive passive samplers, was used for BTEX sample collection from atmospheric air. The monthly average concentrations of BTEX compounds in the air surrounding the monitoring stations in Gdansk and Gdynia from March to December 2011 were as follows: benzene: 0.14–2.37 µg/m3, toluene: from 0.46 to 5.35 µg/m3, ethylbenzene: from 0.14 to 0.88 µg/m3, xylenes: from 0.67 to 3.02 µg/m3. Additionally, the results of the air quality assessment conducted in 2007–2011 in the monitored area are presented in relation to air concentrations of benzene (as a representative of BTEX compounds), nitrogen oxides, and tropospheric ozone. Based on the relationship between benzene concentration and nitrogen oxides concentration, the influence of the aforementioned chemicals on tropospheric ozone concentration was estimated in the urban area of Tricity by using data from Gdansk and Gdynia.