2017 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2017

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Instantaneous Heating and Cooling Caused by Periodic or Aperiodic Sound of Any Characteristic Duration in a Gas with Vibrational Relaxation
- Anna Perelomova
2017 Pełny tekst ACTA ACUSTICA UNITED WITH ACUSTICA
Thermodynamic relaxation of internal degrees of a molecule's freedom in a gas occurs with some characteristic time. This makes wave processes in a gas behave differently depending on the ratio of characteristic duration of perturbations and the relaxation time. In particular, generation of the secondary non-wave modes by intense sound in a nonlinear flow dependens on frequency. These kinds of interaction are considered in this study. The exact links between perturbations inside every type of a fluid's motion (modes) and resulting weakly nonlinear equations for interacting modes are derived. These equations are instantaneous and hence are valid for pulsed excitation. Some kind of energy inflow makes a gas with excited degrees of oscillatory molecule's freedom acoustically active. That leads to anomalous acoustic cooling of a gas. The impact of standard viscosity, thermal conductivity, and dependence of the power of energy inflow on temperature is briefly discussed.
Instantaneous Impedance Analysis of Non-Stationary Corrosion Process: a Case Study of Carbon Steel in 1M HCl
- Jacek Ryl
- Łukasz Gaweł
- Mateusz Cieślik
- Husnu Gerengi
- Grzegorz Lentka
- Pawel Slepski
2017 Pełny tekst International Journal of Electrochemical Science
The paper concerns the problem of evaluation of stationarity of carbon steel corrosion in 1M HCl. Comparison of corrosion rate with addition of corrosion inhibitor to the reference measurement is the most often used way of evaluating inhibitor efficiency. Such an approach is valid only if corrosion rate is a stationary process. Two complementary techniques were used simultaneously: volumetric analysis of evolved hydrogen and instantaneous impedance spectroscopy monitoring. Changes of the electrode surface area and chemical composition have a major impact on the dynamics of both cathodic and anodic processes. On the base obtained results, authors claim that the stationarity of the process determined most often on the base of corrosion potential is ineffective and insufficient.
Instrumental techniques used in the analysis of exhaled air
- Kaja Kalinowska
- Wojciech Wojnowski
- Jacek Namieśnik
2017 World Scientific News
Exhaled air composition changes depending on the health status of the patient, making it possible to use breath analysis for diagnosis and monitoring purposes. Despite the fact that it is not yet used in every day medical practice, it potential application could facilitate the diagnostics of various diseases such as metabolic disorders, respiratory tract and gastrointestinal diseases. Described in this paper are different application of exhaled air analysis. Additionally, currently available techniques of sample analysis are discussed, as well as their potential advantages and disadvantages.
Integrated acoustical-optical system for inventory of hydrotechnical objects
- Krzysztof Bikonis
- Jakub Krawczyk
- Andrzej Stepnowski
2017 Pełny tekst HYDROACOUSTICS
The knowledge of the location, shape and other characteristics of spatial objects in the coastal areas has a significant impact on the functioning of ports, shipyards, and other waterinfrastructure facilities, both offshore and inland. Therefore, measurements of the underwater part of the waterside zone are taken, which means the bottom of the water and other underwater objects (e.g. breakwaters, docks, etc.), and objects above the water, such as the above-water part of the waterside, breakwaters, hydraulic constructions, and other objects of the waterside infrastructure. In this paper, project results of an integrated acoustical-optical system for inventory of hydrotechnical objects are presented. The aim of the project was to elaborate a mobile underwater scanning system which could be applied in various works that require precise, detailed and coherent, underwater and above-water measurement, especially in areas associated with surveying, inspection and monitoring of objects in coastal areas.
Integrated development plans of the functional urban areas in Pomeranian region in Poland
- Jacek Sołtys
- Anna Golędzinowska
2017 Pełny tekst PRACE NAUKOWE UNIWERSYTETU EKONOMICZNEGO WE WROCŁAWIU
The European Commission put a growing emphasis on the territorial and integrated app roach to policy support addressed in the frame of regional policy. In a special way this process refers to cities along with their functional environment. In Poland the National Spatial Development Concept 2030 has introduced the concept of functional areas, among others – Functional Urban Areas (FUAs). There is also a new tool – Integrated Territorial Investment (ITI) – for FUAs in the EU programming perspective of 2014-2020. The scope of the article includes FUAs of regional and sub-regional centers in Pomeranian Voivodeship. The objectives of this paper are: to identify the diversity of projects planned for FUAs; to identify factors that integrate the projects mentioned above. The following main methods have been applied: analysis of documents; typology of projects proposed for implementation concerning their subject and integrating factors. Territorial agreements basing on regional operational program were a formula of development planning in the researched FUAs, more liberal than the formula of ITI. In 95% projects integrating factors can be identified (as hypothesis) and classified. The projects relate to many fields, the most to energy efficiency, health and transport.
Integrated dewatering and stabilization system as an environmentally friendly technology in sewage sludge management in Poland
- Katarzyna Kołecka
- Magdalena Gajewska
- Hanna Obarska-Pempkowiak
- Dariusz Rohde
2017 ECOLOGICAL ENGINEERING
Sludge treatment reed beds (STRBs) are an environmentally friendly technology which provides integrated dewatering and stabilization of sewage sludge. STRBs do not require the use of chemicals to improve the dewatering process. STRB is both, a low-emission and a low-energy-consuming method. After the stabilization process, sludge is characterized by the chemical composition similar to that of humus. The aim of the paper is to present the comprehensive data from Waste Water Treatment Plant (WWTP) in Gniewino (Poland) where the sewage sludge is dewatered and stabilized in a STRB. Research and literature reports indicate that sewage sludge treated in STRB is dewatered, which results in an increase in the dry matter (dm) (from 1.1% to 15.5%) and stabilization due to the decrease in the content of the organic matter (from 71.2% of the dm to 52.4% of the dm). Likewise, thanks to the high concentration of nutrients (TKN concentration − 3.64% of the dm and P concentration − 3.54% of the dm) and the low concentration of heavy metals (below permissible values for the agricultural use) after the time of stabilization, safe and valuable product can be recycled to the environment. Reject water (RW) generated during this process has relatively stable and much better properties in comparison to these which are generated in high technologies for sludge treatment. Thus, recycling the RW from the slugde dewatering in STRB represents a very low internal pollution and should not alert the treatment proceses of wastewater.
Integrating Art into Places in Transition - Rose Kennedy Greenway in Boston as a Case Study
- Magdalena Rembeza
2017 Pełny tekst IOP Conference Series: Materials Science and Engineering
Among the many projects realized in public spaces, some are truly unique – and these are the ones that build the identity of a place. The aim of this paper is to examine how integrating art and cultural strategies into public space can enhance and reinforce the sense of a place. Particular attention is devoted to urban spaces that we call “places in transition”, where public art improves the city’s imaginative capacity, enlivens neighbourhoods, and sparks civic exchange. Research methods include multidisciplinary literature studies and a detailed case study of the Rose Kennedy Greenway (RKG) – a contemporary urban park in Boston, USA, intended to stitch together the various neighbourhoods surrounding downtown. The Greenway is also a place in transition, to which the Conservancy introduces innovative and contemporary art through temporary exhibitions, engaging people in experiences, interactions and dialogue with art. The five-year Public Art Strategy was supported by Fund for the Arts, a public art program of the New England Foundation for the Arts. The main vision of the project is to amplify the Greenway’s unique characteristic through art that is connective, innovative, and celebratory. There are the two main types of projects within the Public Art Strategy for the RKG: short-term projects called “Platforms” and long-term projects called “Magnets”. The particular conceptual framework is being developed to guide proposals: connection, interactivity, civic dialogue, ecology, and the environment. The article examines the case and analyses the important issues related to implementing art into a public space such as reimagining places, short-term and long-term artistic interventions, arts and cultural programming.
Integrating environmental issues with the practice of urban planning
- Joanna Badach
2017 Pełny tekst World Scientific News
Environmental protection of urban areas has become a common concern among academics, policy makers and urban planners. Therefore, environmental issues are often underlined and incorporated into many strategies for urban development. In the article a discussion about the development of the concept of sustainable development in the context of urban planning and international policies is presented, followed by a review of planning tools for integrating spatial and environmental planning.
Inteligentne wspomaganie zarządzania operacyjnego ruchem drogowym
- Ewa Kusio
2017 Pełny tekst Transport Miejski i Regionalny
Najistotniejszym elementem obszarów miejskich są ich systemy transportowe, które stanowią silnik gospodarki. W świetle nowych problemów i wyzwań w zakresie miejskich systemów transportowych, coraz większą rolę zaczynają odgrywać inteligentne systemy transportowe i zarządzanie operacyjne ruchem drogowym w mieście.Niniejszy artykuł przedstawia analizę zagadnień składających się na operacyjne zarządzanie ruchem drogowym w miastach. W dalszej części wskazano obszary oraz czynniki determinujące stosowanie inteligentnych systemów transportowych ITS w miastach w obszarze zarządzania operacyjnego. Jednocześnie w rozważaniach autorka podkreśla znaczenie zarządzania ruchem drogowym jako usługi świadczonej wszystkim użytkownikom dróg i proponuje etapy postępowania związane z dostosowywaniem procesów funkcjonujących w organizacjach zarządzających ruchem do zmian wynikających z wdrażania ITS. Wytyczony cel osiągnięto na podstawie analizy literatury oraz obserwacji i doświadczeń w obsłudze inteligentnego systemu zarządzania ruchem.
INTELIGENTNY SYSTEM DO MONITOROWANIA OSÓB STARSZYCH
- Szymon Bosak
2017
Osoby w podeszłym wieku wymagają większej opieki, która nie zawsze może być im świadczona przez cały dzień. Aby zapewnić pełny nadzór opracowano koncepcję systemu, który na bieżąco monitorowałby parametry fizjologiczne osoby, a w razie wystąpienia niepożądanego zdarzenia komunikowałby się z osobą nadzorującą. Dzięki temu reakcja w nagłych sytuacjach, lub na problemy zdrowotne będzie niezwłoczna, często ratując życie danej osoby.
Intelligent equalizer solution employing music genre and the room characteristics analysis
- Piotr Hoffmann
- Bożena Kostek
2017 Elektronika : konstrukcje, technologie, zastosowania
The paper presents an intelligent equalizer solution based on room acoustic conditions and music genre analysis. A series of acoustic characteristic measurements are performed for checking the concept proposed. White noise (reference signal) and audio excerpts belonging to six music genres are utilized as excitation signals in measurements. This results in registration of frequency responses of rooms and reverberation times. Signals recorded in the listener’s receiver position are used to obtain room equalization characteristics. Pilot subjective tests are performed to obtain information on listeners’ preference on spectral characteristics of reproduced music depending on music genre.
Intelligent system supporting diagnosis of malignant melanoma
- Agnieszka Mikołajczyk
- Arkadiusz Kwasigroch
- Michał Grochowski
2017
Malignant melanomas are the most deadly type of skin cancers. Early diagnosis is a key for successful treatment and survival. The paper presents the system for supporting the process of diagnosis of skin lesions in order to detect a malignant melanoma. The paper describes the development process of an intel-ligent system purposed for the diagnosis of malignant melanoma. Presented sys-tem can be used as a decision support system for primary care physicians and as a system capable of self-examination of the skin with usage of dermatoscope. The system utilizes computational intelligence methods for proper classification of the dermoscopic features extracted from the medical images. The paper also proposes the extension of the well know ABCD method used for malignant melanoma di-agnosis. The proposed system is tested on 126 and trained on 80 skin moles and the obtained results are very promising.
INTENSYFIKACJA WYMIANY CIEPŁA W WYMIENNIKU WĘŻOWNICOWYM Z WYKORZYSTANIEM PRZEGRÓD O RÓŻNEJ GEOMETRII
- Rafał Andrzejczyk
- Tomasz Muszyński
2017
W pracy zaprezentowano możliwości wykorzystania pasywnej intensyfikacji wymiany ciepła w postaci przegród dla podniesienia efektywności energetycznej wymiennika wężownicowego. Badania zostały przeprowadzone z wykorzystaniem modułowego wymiennika z wężownicą w postaci grzałki elektrycznej. Medium odbierającym ciepło była woda o stałych parametrach cieplnoprzepływowych na wlocie do modułu. Pomiary przeprowadzono dla szerokiego zakresu mocy tj. od 100W do 800W i dla masowego natężenia przepływu wody od 0,01 kg/s do 0,025 kg/s. W trakcie pomiarów akwizycji podlegało masowe natężenie przepływającej wody chłodzącej, temperatura na wlocie i wylocie medium roboczego, temperatury ścianki zwojów wężownicy (mierzone w 6 punktach rozłożonych na obwodzie wężownicy) jak również temperatura wody w płaszczu wymiennika ( mierzona w 10 punktach ). Artykuł dowodzi, iż możliwa jest intensyfikacja wymiany ciepła przy wykorzystaniu przegród w rozpatrywanej konstrukcji wymiennika ciepła. Praca dowodzi również, iż istotny wpływ na rozkład profilu prędkości czynnika w płaszczu ma konfiguracja wlotu i wylotu.
Interaction Between Storm Water Conduit And Surface Flow For Urban Flood Inundation Modelling
- Jakub Hakiel
- Michał Szydłowski
2017 Pełny tekst International Journal of Sustainable Development and Planning
Rapid development of urban areas always comes with great side effects. One of them is the occurrence of urban floods. Growth of impervious surfaces in cities leads to increasing run-off values. This together with difficulties connected with sewage modernization in cities marks urban inundations as being one of the most important issues concerning urban water. Accurate prediction of a phenomenon is difficult as it is highly dependent on local conditions and the quality of available data about them. A most recent approach to modelling urban flooding involves a detailed description of the interaction between storm water sewage flow modelling and surface flow modelling. In this paper we will describe a numerical model of urban inundation that is being used to analyse the phenomenon, which consists of 1D storm water flow model (explicit McCormack scheme) and 1D surface flow model (diffusive wave). But before that laboratory tests describing the interaction between used models will be introduced. We will try to evaluate how different surface flow conditions affect interaction and find out if there is an easy way to implement it in coupled numerical modelling of large-scale urban areas inundations. Because tests are still being conducted and further investigation of phenomenon is being done, the conclusions are only preliminary and should be treated as a guideline for future work.
Interaction of human serum albumin with volatiles and polyphenols from some berries
- Rajamohamed Beema
- Tomasz Dymerski
- Jacek Namieśnik
- Zenon Jastrzębski
- Suchada Vearasilp
- Shela Gorinstein
2017 Pełny tekst FOOD HYDROCOLLOIDS
Headspace solid-phase microextraction coupled with comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (HS-SPME/GC GCeTOFMS) identified 19 and quantified 6 monoterpenes in gooseberries, blueberries and cranberries. As a protein model human serum albumin (HSA) was used in interaction with terpenes. Specific binding of terpenes to HSA under the physiological conditions was a result of the formation of a complex. In order to determine the synergism of polyphenols and volatiles in some berries binding properties with HSA were evaluated by 3D-fluorometry and molecular docking. Extracts of polyphenols and monoterpenes, using various ethanol mixtures with water, and their antioxidant properties were determined by two radical scavenging assays (ABTS and CUPRAC). The studied extracts interacted with HSA with different binding affinities which were directly related to their antioxidant properties. The highest binding abilities were in blueberries and g-terpinene. Among the six terpenes, the highest scoring compound was identified as g-terpinene. This study provides useful information for the future designing of health food on the basic of polyphenols and volatile substances.
Intercultural interactions in multinational subsidiaries
- Malgorzata Rozkwitalska
- Michal Chmielecki
- Sylwia Przytula
- Lukasz Sulkowski
- Beata Basińska
2017 Pełny tekst Baltic Journal of Management
Purpose - Our aim is to show how individuals perceive the quality of intercultural interactions at work in multinational subsidiaries, and to address the question of what actually prevails in their accounts, i.e. ‘the dark side’ or ‘the bright side’. Design/methodology/approach - We report the findings from five subsidiaries located in Poland and interviews with 68 employees of these companies. Findings - The ‘bright side’ dominated the interviewees’ accounts. The phenomenon of high social identity complexity or common ingroup identity can help explain the findings. The results also shed some new light on the associations between the context of subsidiaries and the perception of the quality of intercultural interactions.Originality/value – The accounts of intercultural interactions are analyzed to illuminate some significant foundations of how individuals perceive such interactions. The study provides a qualitative lens and highlights the positive approach to intercultural interactions. It may redress the imbalance in prior research and satisfy the need for positive cross-cultural scholarship.
Interdependence between Power Grids and Communication Networks: A Resilience Perspective
- Lucia Martins
- Rita Girao-Silva
- Luisa Jorge
- Alvaro Gomes
- Francesco Musumeci
- Jacek Rak
2017
Power network resilience is increasingly dependent on communication networks. Besides traditional generation, power networks need to accommodate increasingly high penetration levels of dispersed micro generation, mostly based on renewable sources, and increasing and challenging demand, such as electric vehicles. At the same time the deployment of enabling technologies throughout the power grid makes available new demand resources and storage capacity. These resources have to be jointly managed for efficient and resilient operation. Therefore a resilient communication network is mandatory for the smart control of these different resources. Communication networks in turn also rely on the power networks in spite of some power backup that they may have. This interdependence is especially critical in bad weather conditions where both networks can be severely affected, even more when they strongly depend on each other. This work describes ongoing research related with the interdependence between both networks regarding resilience, cascading failure effects, applicable models and simulation techniques.
Interfejs do zdalnego sterowania ploterem z funkcją rozpoznawania obrazów
- Mateusz Kamiński
- Marcin Morawiec
2017 Pełny tekst Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Maszyny numeryczne takie jak obrabiarki CNC, plotery czy drukarki 3D są coraz powszechniejsze w użytku. Na Politechnice Gdańskiej przygotowano pracę magisterską [12], której rezultaty przedstawiono w niniejszym artykule. Ze względu na objętość referatu, przedstawiono jedynie wybrane aspekty budowy plotera, aplikacji na urządzenie mobilne oraz przegląd zastosowanych algorytmów optymalizacji pod kątem szybkości rysowania. Aplikacja funkcjonuje w systemie Android, a komunikuje się z maszyną za pomocą interfejsu bluetooth. Aplikacja oferuje także możliwość optymalizacji tras, zarówno tych rysowanych, jak i nierysowanych, pokonywanych przez ploter. Jest to problem komiwojażera bez powrotu, który rozwiązany może być poprzez algorytmy: zachłanny, genetyczny, wspinaczkowy lub symulowanego wyżarzania.
Internacjonalizacja przedsiębiorstw poprzez sieci. Wyniki badań ankietowych
- Nelly Daszkiewicz
2017 Pełny tekst Studia Ekonomiczne. Zeszyty Naukowe Uniwersytetu Ekonomicznego w Katowicach
Celem artykułu jest określenie wpływu funkcjonowania przedsiębiorstw w sieciach na intensywność ich internacjonalizacji. W artykule dokonano przeglądu najważniejszych teorii internacjonalizacji przedsiębiorstw. Przegląd ten jest punktem wyjścia do wyjaśnienia miejsca i znaczenia podejścia sieciowego (network approach) w wyjaśnianiu procesu umiędzynarodowienia przedsiębiorstw. Następnie opisano podej- ście sieciowe, przywołując zarówno konceptualizacje teoretyczne, jak i wyniki badań. W części empirycznej przedstawiono wyniki badania przeprowadzonego na próbie losowej 263 przedsiębiorstw wysokich technologii (high-tech) działających na terytorium Polski. W zakończeniu artykułu wskazano możliwe dalsze kierunki badań.
Internacjonalizacja szkolnictwa wyższego a kwestia jakości kształcenia i obsługi studentów - przykład Politechniki Gdańskiej
- Magdalena Popowska
2017
Celem artykułu jest omówienie zjawiska internacjonalizacji uczelni w Polsce w kontekście jakości oferowanych przez nie usług. Jest on wynikiem obserwacji internacjonalizacji „oddolnej”, charakterystycznej dla większości uczelni i pokazuje ten proces na przykładzie jednego z polskich uniwersytetów technicznych. Pomimo, że pewne elementy procesu zapewnienia jakości kształcenia i obsługi studentów rodzimych stają się powoli standardem, jakość w kontekście studentów zagranicznych nadal pozostaje ogromnym wyzwaniem. Sprostanie temu wyzwaniu możliwe jest tylko w sytuacji, gdy uczelnia przyjmie postawę samokrytyczną co do swoich możliwości, oraz podda się szeregowi ewaluacji przez instytucje zewnętrzne, najlepiej zagraniczne. To wymaga jednak wsparcia instytucjonalnego i finansowego na poziomie rządowym, przy czym ważne są tu również działania mające wpływ na kształtowanie postaw społecznych otwartości na inne kultury i tolerancji. Podstawowymi metodami badawczymi wykorzystanymi w artykule jest analiza danych statystycznych uczelni oraz dostępnych raportów dot. szkolnictwa wyższego w Polsce.