2017 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2017

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COMPUTER ANALYSIS OF HYDRAULIC CONDITIONS IN A SANITARY CHAMBER
- Piotr Zima
2017
This paper presents analysis of hydraulic conditions of sewage flow down the slipway (ramp) in the collecting sanitary chamber connecting 3 collectors on the inlet: ⌀600, ⌀800 and ⌀1400 and one on the outlet ⌀1600 mm, with a maximum difference of elevation 5 m. The mathematical model has been made and hydraulic calculations were carried out in steady flow conditions. Then wastewater surface elevation, energy grade line elevation, critical depth and the value of average velocity were computed in adopted cross-sections of the model. Adhesion of flux to the surface of the slipway and conditions of energy dissipation in the basin below the ramp were also checked.
Concept of 'Good Urban Governance' and Its Application in Sustainable Urban Planning
- Joanna Badach
- Małgorzata Dymnicka
2017 Pełny tekst IOP Conference Series: Materials Science and Engineering
Contemporary urban theory and practice in the post-industrial era is increasingly often turning towards an approach based on sustainable development. That concept bearing the traits of a paradigm has grown on the ground of broad quest for an alternative to the existing development model of the industrial civilisation. It has gained wide social acceptance and is the basis for many development and environmental programmes at the level of national and local government. It puts in a new light the socio-cultural, ecological and energy-related aspects of space as well as its value and aesthetics. A model of governing the city called ‘good urban governance’ is in a very close relation with the concept of sustainable development. It is based on the principles of inclusiveness, citizenship, accountability, processuality and effectiveness. Although this approach is not entirely novel, it stays valid and open to new challenges connected with satisfying human needs in the urban built environment on the basis of new contemporary conceptualisations such as ‘smart governance’, ‘governing the smart city’, ‘network governance’ and ‘governance networks’. The advantages of this approach based on the assumption of multidimensionality and subjectivity, matching the various and seemingly contradicting interests with a sense of responsibility for the quality of life in the urban environment are often underlined both in literature and in academic debate. The aim of this article is an attempt to present selected practices in spatial planning which employ the principles of the idea of co-governance. It will include various methodological assumptions and criteria applied in ‘good urban governance’. The intention will be to show its new research and application possibilities in countries like Poland where the idea of governance and sustainable development remains a matter of theory.
Conditions and capacity for implementing Poland’s vision zero
- Kazimierz Jamroz
- Wojciech Kustra
- Joanna Żukowska
2017 Pełny tekst MATEC Web of Conferences
Since 1991 Poland has been systematically reducing its traffic hazard. Despite considerable progress Poland is still among the most dangerous countries in the European Union. The key types of actions that help to reduce fatalities include enhancement of pedestrian safety, reducing the number of speeding drivers and eliminating or reducing hazard on the road. The paper presents a brief diagnosis of the state of road safety in Poland and a synthetic evaluation of the implementation of further national road safety programmes. It proposes measures necessary for achieving Vision Zero until 2050 (adopted by the EU) and an assessment of their effectiveness.
Conditions of Iranian international trade in terms of lifting the sanctions: A case study of Polish-Iranian trade perspectives
- Piotr Kasprzak
- Robert Sterniński
2017 Pełny tekst International Business and Global Economy
The main aim of the paper is to identify the areas and determine the feasibility of trade between Polish and Iranian companies in relation to historical and cultural conditions. The authors describe the complexity of the issue of foreign trade, the determinants of relations between Poland and the Islamic Republic of Iran, and the Iranian economy – its features, strengths and weaknesses, and consequences of the recent UN, EU, and US sanctions. They analyse Iranian international trade in recent years, with particular focus on countries with the largest share of import and export, and trade between Iran and EU countries (including Poland). They also describe the most promising sectors from the point of view of Polish exporters as well as prospective sectors for the import of commodities from Iran to Poland. The authors use primarily descriptive statistical methods of analysis, based mainly on literary research and the latest available statistics published by international organisations. The studies show that there are many areas in which cooperation between Polish and Iranian companies would be possible and profitable for both parties. However, measures should be taken to further remove trade barriers and facilitate the establishment and development of bilateral trade relations
Conformation analysis and semiclassical dynamics study of charge exchange process induced by collision of C2+ ions with tetrahydrofuran
- Ewa Erdmann
- Marta Łabuda
2017 Pełny tekst Journal of Physics : Conference Series
We present the results of recent investigations of charge transfer processes in the collisions of C²⁺ ions with heterocyclic molecules of tetrahydrofuran.
Conjugated control of triple active bridge converter with common HFT
- Maciej Grabarek
- Marcin Parchomiuk
- Ryszard Strzelecki
2017
Paper presents synthetic analyses of single input, dual output DC/AC/DC converter with common high frequency transformer. Rise the problem of cross-coupling power flows between secondary terminals, under asymmetrical control operating condition. It also proposes a new approach to converter control, based on conjugated phase shift modulation and defines its limitations. Finally, the developed control technique was verified by simulation in MATLAB/Simulink software
Connected & Automated Urban Mobility, Zombie Cars and Kitchen Knives: Will Autonomous Automobiles, Self-Driving Car-Sharing and Ride-Hailing, and Driverless Shuttles Harm Cities?
- Piotr Marek Smolnicki
2017
There is a deficiency of supportive evidence to verify thesis that cities are prepared for mobility revolution which already begun and will advance exponentially. Furthermore, present revisions mostly emphasize how emerging mobility solutions will alter transport efficiency or affect mass transit usage, rather than on urban morphology, metropolitan society, nor local communities. Author is thoroughly concerned that municipalities do not prepare absorption strategies before automated vehicles - developed by incumbents of automotive industry OEMs - will become ubiquitous. In his previous research the author distinguished e.g. the following emerging technical and organizational automated mobility solutions: autonomous automobiles, self-driving cars and driverless shuttles. This paper presents assumptions based on historical evidence on personal mobility and current research related to each of the solution on metropolitan area. Solutions will have various results depending on morphology of metropolises, their urban core, suburban sprawl or functional hinterland. The author discusses assumptions for benefits and disadvantages emerging from each spatial-technical relationship - the usability and ability to harm cities caused by ubiquitous automated mobility (similarly to ubiquitous kitchen knives). He proposes how to avoid side effects and how to approach the optimal results from implementing new transport technologies. Due to the lack of data, for the research purpose the author will use scenarios method and will verify results with the help of the experts panel with the use of Delphi technique. The results should be used by municipalities (town and transportation planners) for better preparation for technological diffusion of automation in transport. Further, the case study will be necessary to prove each assumed impact.
Consequences of lysine auxotrophy for Candida albicans adherence and biofilm formation
- Iwona Gabriel
- Michał Rychłowski
2017 Acta Biochimica Polonica
A number of factors are known to be involved in Candida albicans virulence, although biofilm development on the surfaces of indwelling medical devices is considered to promote superficial or systemic disease. Based on previously reported up-regulation of saccharopine and acetyllysine in biofilm cells and activation of the lysine biosynthesis/degradation pathway, we investigated the consequences of Candida albicans lysine auxotrophy on adhesion to host tissues and biofilm formation. Our data indicate that mutant strains lysΔ21/lysΔ22, defective in homocitrate synthase, and lysΔ4, defective in homoaconitase activity (the first two α-aminoadipate pathway enzymes), are able to adhere to mouse embryonic fibroblast cells (cell line NIH/3T3) to the same extent as a control strain SC5314. On the other hand, the auxotrophic mutant strains’ development on mouse fibroblast monolayers was significantly reduced up to 5h post infection. Although invasion into humanderived oral epithelial cells was unaltered, both mutant strains formed a significantly different biofilm architecture and demonstrated diminished viability during long term biofilm propagation.
Consumer social network brand identification and personal branding. How do social network users choose among brand sites?
- Wioleta Kucharska
2017 Pełny tekst Cogent Business & Management
Brands’ social networking sites (fan pages) are increasingly attracting the attention of scientists and managers intrigued by their potential application for brand value creation. The aim of this research is to understand better how users choose among social networking sites as an act of brand identification. The study presents a new model whose structure of identification drivers for social networking brand sites varies for customer brand identification in the real and virtual worlds. The presented model reveals that personal branding is a planned effect of brand identification and it is crucial for brand value creation in social networks.
Consumerism and the Quality of Life
- Anna Drapińska
2017 Handel Wewnętrzny
High level of consumption, driven by marketing activities, the pleasure and joy of possession and the accumulation of material goods are often associated with prosperity, sense of happiness and fulfilment in life. On a broader scale, economic indicators related to production and consumption are used to define the well-being and quality of life in societies. Unfortunately, the phenomenon of consumerism entails negative social and individual consequences. It is worthwhile to consider whether striving to increase consumption, including artificial creation of demand through marketing activities, is indeed the right and necessary action to be taken in the quest for the adequate life quality level of the contemporary man. The objective of this article is to try to answer the question whether high consumption level actually leads to an increase in the quality of life. The article is also a voice in an interdisciplinary debate which the today’s world needs to a great extent.
CONTAINER SHIPPING MARKET IN THE BALTIC SEA REGION
- Adam Lewiński
2017
The following article presents the situation on the maritime container transport market in the Baltic Sea Region. In the first part the author focuses on describing the specifics of the economic and geopolitical area of the Baltic Sea. The following parts include the market container shipping description along with its individual participants, such as carriers or seaports. Finally, the dynamic development of Polish container ports and their leading role in the region are presented.
Contamination of water in Oliwski Stream after the flood in 2016
- Karolina Matej-Łukowicz
- Ewa Wojciechowska
2017 Pełny tekst
In the article pollution of stream waters with surface runoff from an urbanized area caused by an extremely high rainfall is discussed. The analyzes were carried out after the rainfall of the depth 152 mm which took place in Gdańsk on 14th and 15th July 2016. This extreme rainfall caused urban flooding, damage of several retention ponds and pollution of surface waters. In the article the results of physical and chemical analyzes of the water samples from Oliwski Stream, inflowing to the Gulf of Gdańsk at the beach in Jelitkowo, are presented. The samples were collected at six points along the Stream in order to evaluate potential pollution sources. The results of the study indicated elevated concentrations of phosphorus compounds and nitrates (V). Additionally, the concentrations of total suspended solids (TSS), solids granulometry and grain size distribution along the stream was investigated.
Contemporary Spaces of Memory - Towards Transdisciplinarity in Architecture
- Joanna Kabrońska
2017 Pełny tekst IOP Conference Series: Materials Science and Engineering
The paper explores new phenomena in the contemporary practice of commemoration implemented through architecture. Architectural objects related to memory can be a place where new trends and phenomena appear earlier than in other architectural objects. The text is an attempt to prove that these new spaces of memory are a kind of laboratory where new ideas taking place in architecture and related disciplines are being tested. Research focuses on the bond between the complex and difficult problem of memory and the issue of transdisciplinarity in architecture. Over the last few decades architecture has been - in comparison to other areas - a relatively closed domain of knowledge. Contemporary places of memory - different from the traditional - may be the evidence of changes. On the basis of theoretical approaches, interdisciplinary surveys, in-field analyses and case studies the paper give insight into the relationships between architecture and other areas, emerging in the recently created spaces of memory of different types. The text indicates that today both the study and the design of such places is difficult without going beyond the field of architecture. There is a need for further extensive research, but the paper confirms the potential of this research direction. Spaces of memory offer the opportunity to capture the transformation of the discipline at the moment when the process begins.
Control of induction machine supplied by a current source inverter using the multi-scalar transformation and backstepping approach
- Marcin Morawiec
- Filip Wilczyński
- Arkadiusz Lewicki
2017
The paper describes the voltage control technique of squire-cage induction machines supplied by a current source inverter. The control system is based on new transformation of the electric drive system (machine and inverter) state variables to the multi-scalar variables form. The backstepping approach is used to obtain the feedback control law. The control system contains the structure of the observer backstepping which is named Z. The paper contains the theoretical analysis of the control system with the new multi-scalar proposed transformation. The control system performances and mathematical dependences are confirmed by the experimental results.
Controlled grafting of vinylic monomers on polyolefins: a robust mathematical modeling approach
- Mohammad Saeb
- Babak Rezaee
- Alireza Shadman
- Krzysztof Formela
- Zahed Ahmadi
- Farkhondeh Hemmati
- Tayebeh Kermaniyan
- Yousef Mohammadi
2017 Pełny tekst DESIGNED MONOMERS AND POLYMERS
Experimental and mathematical modeling analyses were used for controlling melt free-radical grafting of vinylic monomers on polyolefins and, thereby, reducing the disturbance of undesired cross-linking of polyolefins. Response surface, desirability function, and artificial intelligence methodologies were blended to modeling/optimization of grafting reaction in terms of vinylic monomer content, peroxide initiator concentration, and melt-processing time. An in-house code was developed based on artificial neural network that learns and mimics processing torque and grafting of glycidyl methacrylate (GMA) typical vinylic monomer on high-density polyethylene (HDPE). Application of response surface and desirability function enabled concurrent optimization of processing torque and GMA grafting on HDPE, through which we quantified for the first time competition between parallel reactions taking place during melt processing: (i) desirable grafting of GMA on HDPE; (ii) undesirable cross-linking of HDPE. The proposed robust mathematical modeling approach can precisely learn the behavior of grafting reaction of vinylic monomers on polyolefins and be placed into practice in finding exact operating condition needed for efficient grafting of reactive monomers on polyolefins.
Controlling the size and morphology of precipitated calcite particles by the selection of solvent composition
- Donata Konopacka-Łyskawa
- Barbara Kościelska
- Jakub Karczewski
2017 JOURNAL OF CRYSTAL GROWTH
Calcium carbonate particles were obtained in the reaction of calcium hydroxide with carbon dioxide at 65°C. Initial Ca(OH)2 suspensions were prepared in pure water and aqueous solutions of ethylene glycol or glycerol of the concentration range up to 20% (vol.). The course of reaction was monitored by conductivity measurements. Precipitated solids were analyzed by FTIR, XRD, SEM and the particles size distribution was determined by a laser diffraction method. The adsorption of ethylene glycol or glycerol on the surface of scalenohedral and rhombohedral calcite was testes by a normal-phase high-performance liquid chromatography. The addition of organic solvents changed the viscosity of reaction mixtures, the rate of carbon dioxide absorption and the solubility of inorganic components and therefore influence calcium carbonate precipitation conditions. All synthesized calcium carbonate products were in a calcite form. Scalenohedral calcite crystals were produced when water was a liquid phase, whereas addition of organic solvents resulted in the formation of rhombo-scalenohedral particles. The increase in organic compounds concentration resulted in the decrease of mean particles size from 2.4 µm to 1.7 µm in ethylene glycol solutions and to 1.4 µm in glycerol solutions. On the basis of adsorption tests, it was confirm that calcite surface interact stronger with glycerol than ethylene glycol. The interaction between scalenohedral calcite and used organic additives was higher in comparison to the pure rhombohedral form applied as a stationary phase.
Convex set of quantum states with positive partial transpose analysed by hit and run algorithm
- Konrad Szymański
- Benot Collins
- Tomasz Szarek
- Karol Życzkowski
2017 Journal of Physics A-Mathematical and Theoretical
The convex set of quantum states of a composite K×K system with positive partial transpose is analysed. A version of the hit and run algorithm is used to generate a sequence of random points covering this set uniformly and an estimation for the convergence speed of the algorithm is derived. For K >3 or K=3 this algorithm works faster than sampling over the entire set of states and verifying whether the partial transpose is positive. The level density of the PPT states is shown to differ from the Marchenko–Pastur distribution, supported in [0, 4] and corresponding asymptotically to the entire set of quantum states. Based on the shifted semi–circle law, describing asymptotic level density of partially transposed states, and on the level density for the Gaussian unitary ensemble with constraints for the spectrum we find an explicit form of the probability distribution supported in [0, 3], which describes well the level density obtained numerically for PPT states.
COOPERATION BETWEEN UNIVERSITY AND EXTERNAL COMPANY IN ARCHITECTURAL INVENTORY USING INNOVATIVE MEASURING TECHNOLOGY
- Paweł Tysiąc
- Wojtowicz Aleksander
- Katarzyna Bobkowska
2017 Pełny tekst
Architectural inventories are the main field for using innovative technology ( remote sensing). The main purpose of using ie. Laser scanning or photogrammetry is to capture all of the important details of structure. Regarding the extents of inventory works, it may only apply to external details, such as facades, supporting structures and surroundings, whilst in terms of advanced inventory, the building's interior is also expected to be surveyed. The interior works are far more difficult due to complex nature of building's plan. In case of older structures, more historic ones, there are many obstructed places and wall bends that make the survey's geometry situation far more difficult. In this study, the LiDAR technology was implemented considering its look at detail and the whole. Laser scanners are capable of measuring with great spatial resolution giving the operator useful information of both structure placement, together with surface details. No other technology is able to conduct architectural surveys no matter what the light conditions are, giving the opportunity to scan remote, dark basements and attics. This the biggest advantage in comparison to classic photogrammetric surveys conducted with cameras that require proper amount of light. Those pros give operators a chance to complete the works in incomparably shorter time with much higher data quality. A final product of such inventory works are special datasets -"pointclouds" that might be further developed in CAD drawings. Contemporary architectural products combine those CAD outlines into Building Information Models (BIM). What is more, the application of such fast and accurate measuring techniques in service of preserving the cultural heritage sites, endangered by natural disasters or human activity, is worth considering when it comes to possible, unreversable damages. Aforesaid cooperation between industry and university is a perfect match of effectiveness of commercial approach and academic expertise.
Cooperation of ORC installation with a gas boiler as a perspective co-generation system for households
- Jan Wajs
- Dariusz Mikielewicz
2017 Pełny tekst Acta Energetica
This paper reports tests of an innovative micro-CHP unit prototype, consisting of a traditional gas boiler and organic Rankine cycle (ORC), which incorporates original system components such as an axial vapour microturbine, evaporator and condenser. The system co-generates heat and electricity for a single household or a group of households. Electricity is only a by-product during production of heat. While testing the prototype, temperatures of the ORC working fluid and condenser cooling water were measured, as well as the heat flows, electricity output, and the efficiency of the entire system were estimated. It has been shown that the tested system can produce 1 kWe of electricity, and a typical home gas boiler can at the same time act as an autonautonomous source of heat for heating purposes and for the production of saturated/superheated ethanol vapour in the ORC system. In the authors’ opinion, a commercially available gas boiler, additionally equipped with an ORC module with an ecological working fluid, may be considered a perspective co-generation unit for future households located outside the system heat supply.
Cooperative Data Transmission in Wireless Vehicular Networks
- Andrzej Marczak
2017
The paper presents issues related to the cooperative transmission in wireless vehicular networks. Cooperative transmission involves the use of mobile terminals as relay stations to improve the transmission quality, improve network performance and reduce energy consumption. The paper presents the methods used to implement cooperative transmission and the types of cooperative networks.