2017 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2017

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The logistics streamlining of the material flow at the production company
- Kisielewski Marcin
- Radosław Drozd
2017 Research in Logistics & Production
The main practical problem in the Logistics Department at the company is overstaffing in the unit responsible for the flow of materials. Carried out by the authors of the article, some detailed research on the process analysis in the discussed company indicates that the main cause of such a situation is related to an increase in the amount of transported material and a lack of redesigning the material flow in spite of the increased levels of production and acquisition of new projects. At present, at the company the material is prepared and transported by eleven employees whose work is not standardised and impossible to control. Such a large number of people working at the same time at the warehouse and moving through the transport corridors seriously affects the level of safety in a negative way. Therefore, the authors of the publication have suggested three solutions which involve some logistic changes in the existing process in order to increase safety and to reduce the number of staff involved in the transport.
The long-term properties of mineral-cement-emulsion mixtures
- Bohdan Dołżycki
- Mariusz Jaczewski
- Cezary Szydłowski
2017 Full text CONSTRUCTION AND BUILDING MATERIALS
This publication presents evaluation of long-term behavior of mineral-cement-emulsion (MCE) mixtures. MCE mixtures are among the major products of cold recycling of old asphalt pavements. They are composed by binding of the old materials reclaimed from the pavement and new mineral aggregate using two different binding agents – cement and bituminous emulsion. While bituminous emulsion dissolutes and binds materials quite fast, it does not increase the stiffness modulus of the whole mixture. Opposite behavior occurs for cement. Its effects appear slowly and all construction materials that contain cement present the increase of strength and stiffness modulus with time. Usually the increase of strength or modulus is similar for all tested materials for the same curing periods. This article investigates the impact of combination of two binding agents and their different amounts on the increase in strength and stiffness modulus of mineral-cement-emulsion mixtures with curing time. Conducted literature and laboratory studies showed that regarding the short term changes of modulus and phase angle, mineral-cement-emulsion mixtures present similar behavior to other cementbound materials, such as cement concrete or cement-bound mixtures. In the case of long-term behavior similarities to the cement-treated materials were found as well: an increase in moduli and a decrease in phase angles were observed for longer curing times. This kind of behavior illustrates that hydraulic bonds affect both mechanical and rheological long-term properties of mineral-cement-emulsion mixtures.
The miniaturised emission chamber system and home-made passive flux sampler studies of monoaromatic hydrocarbons emissions from selected commercially-available floor coverings
- Mariusz Marć
- Jacek Namieśnik
- Bożena Zabiegała
2017 Full text BUILDING AND ENVIRONMENT
The estimation of the emission rate of organic compounds released from various types of indoor materials can be performed using stationary environmental test chambers (ETC) classified as ex-situ methods or small-scale portable analytical devices based on the use of passive technique at the stage of analytes sampling from the gaseous phase (in-situ methods). The paper presents results of emissions of selected organic compounds from the monoaromatic hydrocarbons group (benzene, toluene, ethylbenzene, p,m-xylene and styrene) emitted from the surfaces of various types of commercially-available floor coverings and the underlay made of polyurethane foam which might be installed indoors under floor coverings. The research were conducted simultaneously using a new type of miniature emission chambers system m-CTE™ 250 and a new type of home-made passive flux sampler (PFS). The interpretation and comparison of the obtained results allowed for determination of main factors that significantly affect the result of analysis and, ultimately, on the reliability of emission assessments, which included: the operation mode of the analytical device, the duration of studies and metrological and morphological characteristics of the studied samples. It was observed that in a case of floor coverings with synthetic fibres, the emission rate is influenced by factors such as: the fleece/pile weight (g/m2), the type of synthetic material used for fibre production, the colour of fibres and the applied underlay type (felt or synthetic jute). In a case of flexible floor coverings made of poly(vinyl chloride), the thickness of the abrasive layer influenced the quantity of released organic compounds.
The Most Valuable Global Brands and Condition of Economies: a Spatial Approach
- Wioleta Kucharska
- Karol Flisikowski
2017
Research background: Brands are considered to be the most valuable asset of a company. Some of them achieve spectacular global results. The significance of global brands is proved by the fact that their value is often greater than the sum of all company’s net assets. Purpose of the article: The aim of this article is to highlight that brand value does not only create company’s value but also leverages economies. We claim that even though global brands are sold worldwide they more strongly contribute to the development of economies in the countries where these brands’ owners are located. Methodology/methods: Based on 500 Brandirectory, the most Valuable Global Brands ranking powered by Brand Finance, we have discovered a spatial-economic autocorrelation to illustrate the potential interdependency between GDP and brand value which constitutes a foundation for further construction of a spatial regression model. Because the ranking data was only available for the year 2014, the analyses were performed for 33 selected countries. Findings: Our findings confirm the hypothesis that assumptive spatial dependencies matter for the investigated relationship between brand value and GDP. The evidence is based on the spatial error and the spatial lag model, although the former has a slightly better performance than the latter alternative.
The motion influence on respiration rate estimation from low-resolution thermal sequences during attention focusing tasks
- Alicja Kwaśniewska
- Jacek Rumiński
- Jerzy Wtorek
2017 Full text
Global aging has led to a growing expectancy for creating home-based platforms for indoor monitoring of elderly people. A motivation is to provide a non-intrusive technique, which does not require special activities of a patient but allows for remote monitoring of elderly people while assisting them with their daily activities. The goal of our study was to evaluate motion performed by a person focused on a specific task and check if this motion disrupts estimation of respiration rate. The preliminary results show that it is possible to reliable estimate respiration rate by focusing attention of a patient on a certain activity. The respiratory rate analyzed for silent reading task was estimated with mean error 0.27 breaths per minute (bpm), while for reading aloud task with 1.18 bpm. The observed head motion during the reading aloud task was 1.5 higher that for silent reading and about two times smaller for a case in which subjects were not focused on any task.
The need for linear revitalization. Gdynia case
- Aleksandra Sas-Bojarska
2017 Full text IOP Conference Series: Materials Science and Engineering
The aim of the article is to discuss the need of defining and implementation of the linear revitalization - the new approach related to the revitalization processes. The results of the preliminary investigations indicate that this kind of revitalization seems to be an important tool supporting city management and planning, especially in cases of cities fragmentation - causing lack of physical, social, economic and ecological cohesion. The problems which may occur in such situations could be, in author’s opinion, solved with the use of linear revitalization. Linear revitalization relates to various linear city structures, which need a renewal. The article presents the idea of new attitude, character of specific actions related to degraded linear structures, draft classification, as well as the potential benefits to the city structure which could be reached due to the linear revitalization implementation. The theoretical deliberations are supplemented by the description and assessment of the chosen case study from Gdynia in Poland. The Kwiatkowskiego Route in Gdynia, playing important role in the city traffic as the external connection, creates the barrier in the city structure, causing many negative effects. Author presents specific problems related to chosen example, and the ways to solve them and to connect city structure. The main conclusion of the study is that the presented approach may be, in author's opinion, the beginning of the discussion related to the linear revitalization, which may become an important and effective tool of sustainable city development. It may help overcoming physical barriers, and minimise functional, economic, social, mental and environmental conflicts caused by city fragmentation.
The occurrence of heavy metals and metal-resistant bacteria in water and bottom sediments of the Straszyn reservoir (Poland)
- Eliza Kulbat
- Aleksandra Sokołowska
2017
The aim of this study is investigate the distribution of selected heavy metals (zinc, copper, lead, cadmium) and metal-resistant bacteria in water and bottom sediments of drinking water reservoir for Gdańsk (Poland). The research area - Straszyn Lake is a dam reservoir on Radunia river, of the total volume of 3 mln m3. Sediment and water sampling took place between May and October 2013 (eight series). Regarding metal concentration in sediments the following sequence of metals can be written down: Zn>Pb>Cu>Cd. These metal concentrations were slightly higher than the average ones for Pommeranian Region. Evaluation of metals accumulation was performed using Müller index, which is arranged from the numbers 0 to 6 to indicate the bottom sediment’s contamination and geochemical classification of sediment quality according to Polish standards. Müller geochemical index was changing in a wide range: the lowest values for each metal were observed in the sampling point located near the inflow of Radunia river, and the highest – near the dam. The maximum value of Müller’s geochemical index was determined for copper: 4.1 which means that the sediment is ‘strongly contaminated’. However, the analysed bottom sediments were classified as the I and II category according to Polish geochemical standards. A significant part of heterotrophic bacteria isolated from the bottom sediment and surface water (raw and treated water) showed a resistance to 0.2 mM and 2 mM concentrations of zinc, copper and lead. The highest percentages of metal- resistant bacteria were recorded in the sediments of the reservoir (60% - 88%). The share of metal-resistant strains in the raw water was significantly lower (34% - 61%). The results indicate also that water treatment processes may contribute to the selection of resistant strains.
The OptD-multi method in LiDAR processing
- Wioleta Błaszczak-bąk
- Anna Sobieraj-Żłobińska
- Michał Kowalik
2017 MEASUREMENT SCIENCE & TECHNOLOGY
New and constantly developing technology for acquiring spatial data, such as LiDAR (light detection and ranging), is a source for large volume of data. However, such amount of data is not always needed for developing the most popular LiDAR products: digital terrain model (DTM) or digital surface model. Therefore, in many cases, the number of contained points are reduced in the pre-processing stage. The degree of reduction is determined by the algorithm used, which should enable the user to obtain a dataset appropriate and optimal for the planned purpose. The aim of this article is to propose a new Optimum Dataset method (OptD method) in the processing of LiDAR point clouds. The OptD method can reduce the number of points in a dataset for the specified optimization criteria concerning the characteristics of generated DTM. The OptD method can be used in two variants: OptD-single (one criterion for optimization) and OptD-multi (two or more optimization criteria). The OptD-single method has been thoroughly tested and presented by Błaszczak-Bąk (2016 Acta Geodyn. Geomater. 13/4 379–86). In this paper the authors discussed the OptD-multi method.
The overexpression of CPR and P450 3A4 in pancreatic cancer cells changes the metabolic profile and increases the cytotoxicity and pro-apoptotic activity of acridine antitumor agent, C-1748
- Barbara Borowa-Mazgaj
- Anna Mróz
- Ewa Augustin
- Ewa Paluszkiewicz
- Zofia Mazerska
2017 BIOCHEMICAL PHARMACOLOGY
Drug resistance is one of the major cause of pancreatic cancer treatment failure. Thus, it is still imperative to develop new active compounds and novel approach to improve drug efficacy. Here we present 9-amino-1-nitroacridine antitumor agent, C-1748, developed in our laboratory, as a candidate for pancreatic cancer treatment. We examined (i) the cellular response of pancreatic cancer cell lines: Panc-1, MiaPaCa-2, BxPC-3 and AsPC-1, differing in expression levels of commonly mutated genes for this cancer type, to C-1748 treatment and (ii) the role of P450 3A4 isoenzyme and cytochrome P450 reductase (CPR) in the modulation of this response. C-1748 exhibited the highest cytotoxic activity against MiaPaCa-2, while AsPC-1 cells were the most resistant (IC50: 0.015, 0.075 μM, respectively). A considerable amount of apoptosis was detected in Panc-1 and MiaPaCa-2 cells but only limited apoptosis was observed in AsPC-1 and BxPC-3 cells as indicated by morphological changes and biochemical markers. Furthermore, only AsPC-1 cells underwent senescence. Since AsPC-1 cells were the most resistant to C-1748 as evidenced by the lowest P450 3A4 and CPR protein levels, this cell line was subjected to transient transfection either with P450 3A4 or CPR gene. The overexpression of P450 3A4 or CPR changed the pro-apoptotic activity of C-1748 and sensitized AsPC-1 cells to this drug compared to wild-type cells. However, metabolism was changed significantly only for CPR overexpressing cells. In conclusion, the antitumor effectiveness of C-1748 would be improved by multi-drug therapy with chemotherapeutics, that are able to induce P450 3A4 and/or CPR gene expression.
The performance of H2O, R134a, SES36, ethanol, and HFE7100 two-phase closed thermosyphons for varying operating parameters and geometry
- Rafał Andrzejczyk
- Tomasz Muszyński
2017 Full text Archives of Thermodynamics
In this study, the influences of different parameters at performance two-phase closed thermosiphon (TPCT) was presented. It has been confirmed that the working fluid, as well as operating parameters and fill ratio, are very important factors in the performance of TPCT. The article shows characteristics of gravitational tube geometr ies, as well as the technical characteristic of the most important system components, i.e., the evaporator/condenser. The experiment’s plan and the results of it for the two-phase thermosiphon for both evaluated geometries with varying thermal and fluid flow parameters are presented. Experiments were performed for the most perspective working fluids, namely: water, R134a, SES36, ethanol and HFE7100. Obtained research proves the possibility to us e TPCT forheat recovery from the industrial waste water.
The POCOBIO Database for Computed Scattering Cross-Sections for Positron Collisions with Biomolecular Systems
- Jan Franz
2017 Full text ACTA PHYSICA POLONICA A
The design of a database for positron interactions with biomolecular systems is outlined. The database contains only scattering cross sections, which are derived from theory. The data model is defined in a very flexible way, which facilitates the usage of weakly bound clusters of molecules and molecular systems with many tautomeric forms.
The potential of Web-GIS and geovisual analytics in the context of marine cadastre
- Agnieszka Dawidowicz
- Marcin Kulawiak
2017 SURVEY REVIEW
The importance of the marine environment to human existence makes it imperative that information models represent the multidimensional nature of reality as closely as possible in order to facilitate good governance. Information regarding jurisdiction, as well as the effects of formal law and community interests on the marine environment (e.g. nature and spatial extents as well as rights, responsibilities, restrictions etc.) would be stored in a marine cadastre. The aim of the presented research is to present a concept marine cadastre structure for the EU Member State of Poland as well as show the potential of the application of open standards and Geovisual Analytics for the purpose of marine cadastre data integration, dissemination and analysis with the use of a Geographic Information System (GIS). The paper also presents a sample implementation of the proposed concept in the form of a Web-GIS for analysis and visualization of risk assessment results in the context of a marine cadastre for the country of Poland.
The Principles of Model Building Concepts Which Are Applied to the Design Patterns for Smart Cities
- Katarzyna Ossowska
- Liliana Szewc
- Cezary Orłowski
2017
The involvement of citizens into decision-making processes is one of the main features of smart cities. Such commitment is reflected in the form of requirements towards the city, and the benefits which are expected from the city. Requirements and benefits are thus the primary language of communication between decision-makers and urban residents. To develop such a language, it becomes necessary to develop design patterns for Smart Cities, that could integrate the requirements and benefits into ontological concepts referring to the rules describing design patterns. The article proposes the construction of a conversion model of requirements and benefits, which are saved with the use of the natural language into ontological concepts of the principles referring to the patterns of Smarty Cities. The study verifies the model developed in the environment of an experiment. It applies ontologies for both languages: of benefits and of requirements. Then, it rates the mapping of both ontologies in relation to the sample requirements and benefits presented for Smart Cities. After that, the similarity of both ontologies is assessed and the concepts for the standard pattern rules are defined. This approach provides conditions for the development of Smart Cities patterns and for their use in decision-making processes which are so important for the development of Smart Cities.
THE PROBLEM OF AIRFLOW AROUND BUILDINGS CLUSTERS IN DIFFERENT CONFIGURATIONS
- Mateusz Jędrzejewski
- Marta Poćwierz
- Katarzyna Zielonko-Jung
2017 Full text Archive of Mechanical Engineering
In the paper, the authors discuss the construction of a model of an exemplary urban layout. Numerical simulation has been performed by means of a commercial software Fluent using two different turbulence models: the popular k-ε realizable one, and the Reynolds Stress Model (RSM), which is still being developed. The former is a 2-equations model, while the latter – is a RSM model – that consists of 7 equations. The studies have shown that, in this specific case, a more complex model of turbulence is not necessary. The results obtained with this model are not more accurate than the ones obtained using the RKE model. The model, scale 1:400, was tested in a wind tunnel. The pressure measurement near buildings, oil visualization and scour technique were undertaken and described accordingly. Measurements gave the quantitative and qualitative information describing the nature of the flow. Finally, the data were compared with the results of the experiments performed. The pressure coefficients resulting from the experiment were compared with the coefficients obtained from the numerical simulation. At the same time velocity maps and streamlines obtained from the calculations were combined with the results of the oil visualisation and scour technique.
The process generation of WWTP models for optimization of activated sludge systems
- Jakub Drewnowski
- Kamil Wiśniewski
- Aleksandra Szaja
- Grzegorz Łagód
- Carmen Hernandez
2017
The objective of water and wastewater utilities, which are responsible for optimization of wastewater treatment plant operation, is threefold: environmental protection, saving money, and mitigation of pollutant emissions, both to water and air. The performed study aimed to assess the process generation of WWTP models that improve activated sludge systems operation, by means of new developed Mantis2 model. This model accounts for the most prevalent biological and chemical processes occurring in wastewater treatment plants. It integrates the nitrogen, phosphorus, and carbon removal, as well as anaerobic digestion. Mantis2 is based, among others, on ASM2d and UCTADM1 models. In order to conduct evaluation, a WWTP layout was prepared by means of GPS-x software and used in dynamic simulation. The conducted simulations show that optimization of wastewater treatment plant operation can be achieved by changes in operating parameters. It was also demonstrated that energy savings can be obtained in various facilities with AS aeration systems.
The Processing Procedure for the Interpretation of Microseismic Signal Acquired from a Surface Array During Hydraulic Fracturing in Pomerania Region in Poland
- Michał Antoszkiewicz
- Mateusz Kmieć
- Paweł Szewczuk
- Marek Szkodo
- Robert Jankowski
2017 Full text
Hydraulic fracturing is a procedure of injecting high pressure fluid into the wellbore in order to break shell rock and facilitate gas flow. It is a very costly procedure and, if not conducted properly, it may lead to environmental pollution. To avoid costs associated with pumping fluid outside the perspective (gas rich) zone and improve one’s knowledge about the reservoir rock, microseismic monitoring can be applied. The method involves recording seismic waves, which are induced by fractured rock, by an array of sensors distributed in a wellbore nearby or on the surface. Combining geological and geophysical knowledge of region with signal processing computer techniques, one can locate induced fractures allowing for real-time process monitoring and rock properties evaluation. In Poland perspective shell formation is located very deep, i.e. about 4km from the surface. Additionally overlaying rock formations strongly attenuate and disperse seismic waves. Therefore, signal recorded by a surface array of sensors is very weak. Signal from a seismic event can be orders of magnitude lower than noise. To recover signal connected with fractured rock one needs to use numerical methods utilizing coherence of signals. An example of such a computer procedure is presented in this paper.
The project IDENT: Multimodal biometric system for bank client identity verification
- Andrzej Czyżewski
- Piotr Bratoszewski
- Piotr Hoffmann
- Michał Lech
- Maciej Szczodrak
2017
Biometric identity verification methods are implemented inside a real banking environment comprising: dynamic handwritten signature verification, face recognition, bank cli-ent voice recognition and hand vein distribution verification. A secure communication system based on an intra-bank client-server architecture was designed for this purpose. Hitherto achieved progress within the project is reported in this paper with a focus on the design and implementation of the developed biometric authentication system. Implemented multimodal biometric client identity verification methods are briefly outlined and results of hitherto obtained biometric sam-ple acquisition and analysis are reported.
THE PROPERTIES OF NANOSILVER – DOPED NANOHYDROXYAPATITE COATING ON THE Ti13Zr13Nb ALLOY
- Michał Bartmański
2017 Full text Advances in Materials Science
The aim of this research was to study the properties of nanohydroxyapatite (nanoHAp) and nanohydroxyapatite, doped with nanosilver (nanoHAp/nanoAg), coatings obtained by an electrophoretic deposition process. The suspensions was prepared by dispersing 0.1 g of HAp nanopowder for nanoHAp coatings and 0.1 g of nanoHAp and 0.025 g nanoAg for nanoHAp/nanoAg coatings. The deposition was carried out for 1 min at 50 V voltage followed by drying at room temperature for 24 h and heating at 800°C for 1 h in vacuum. The thickness of the nanoHAp and nanoHAp/nanoAg coatings was found as of about 5 µm. The corrosion behavior tests made by potentiodynamic methods brought out slightly higher values of corrosion current for nanoHAp coatings and nanoHAp/nanoAg coatings as compared to the reference Ti13Zr13Nb specimen. The nanohardness of the nanoHAp coatings achieved 0.020  0.004 GPa and of the nanoHAp/nanoAg coatings 0.026  0.012 GPa. Nanoscratch test of the nanoHAp and nanoHAp/nanoAg coatings revealed an increased Critical Friction (mN) in the presence of nanosilver particles. The wettability angles decreased for nanoHAp/nanoAg coatings comparing to pure nanoHAp coatings on titanium alloy.
The QDMC Model Predictive Controller for the Nuclear Power Plant Steam Turbine Control
- Paweł Sokólski
- Tomasz Adam Rutkowski
- Kazimierz Duzinkiewicz
2017
There are typically two main control loops with PI con trollers operating at each turbo-generator set. In this paper a model predictive controller QDMC for the steam turbine is proposed - instead of a typical PI controller. The QDMC controller utilize a step-response model for the controlled system. This model parameters are determined, based on the simplified and linear model of turbo-generator set, which parameters are identified on-line with RLS algorithm. It has been found that the proposed QDMC controller realize the reference trajectories of the effective power and the angular velocity, and damp the electrome- chanical oscillations with satisfactory quality in comparison to the typical PI and DMC controllers.
The ranks of Indonesian and Japanese industrial sectors: A further study
- Ubaidillah Zuhdi
2017 Full text
The purpose of the current study is to extend the previous study which analyzes the industrial sectors ranks of specific countries. More specifically, the study aims to conduct a further analysis regarding the ranks by using the new data as well as new analysis periods. The study focuses on the cases of Indonesia and Japan. In this study, the analysis period of the Indonesian case is 2010 while for the case of Japan is 2011. Using the previous study as a reference, the study employs the Input-Output (IO) approach as an analysis device. As with the previous study, the results of this study show that the orders of the ranks depend on the methods used. Nevertheless, from the results, one can argue that the electricity and gas industry was a leading sector in the Indonesian economy in 2010. On the other hand, for the case of Japan, the competitive sector in the Japanese economy in 2011 was the manufacturing industry. In terms of the leading sectors, the current study is different from the previous one.