2018 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2018

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Response to the queries raised by Dr M.M. Awad in a letter to editor comments on “Pressure drop of HFE7000 and HFE7100 during flow condensation in minichannels”
- Dariusz Mikielewicz
- Jan Wajs
- Rafał Andrzejczyk
- Michał Klugmann
2018 INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
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Results from tests on bolted connection components for evaluation of friction coefﬁcient in various contact conditions
- Artur Olszewski
- Jacek Łubiński
- Dominik Olszewski
- Jerzy Gliwiński
- Krzysztof Druet
2018
The main purpose of the work was the analysis and evaluation of the self-locking quality of a bolted joint covered with Xylan 1070 coating, with comparison to the classic bolts lubricated with Molykote compound during assembly. The second part of the work was the veriﬁcation of the compliance of the bolts and nuts used in the installation with the ASME B1.1 norm.
Review and comparison of smoothing algorithms for one-dimensional data noise reduction
- Paweł Kowalski
- Robert Smyk
2018
The paper considers the choice of parameters of smoothing algorithms for data denoising. The impact of the window size on smoothing accuracy was analyzed. The parameters of denoising filters were selected with respect to the meansquare error between the computed linear regression and the noisy signal. Finally, we have compared mean, median, SavitzkyGolay, Kalman and Gaussian filter algorithms for the data from the digital sensor. The figure of merit was also the algorithm execution time.
Review of non- welded piping technologies on offshore equipment projects
- Radosław Drozd
- Wojciech Pędzich
2018 Full text Przedsiębiorstwo we współczesnej gospodarce - teoria i praktyka
The aim of this article are considerations on welded and non-welded tube connection technologies, with advantages and disadvantages of both. After choosing non-welded solutions as the assembly method of choice, the thesis progresses to describing the most widely-used tube connection technologies (JIC, Ermeto, retain ring flanges, flared tube flanges and other, minor, solutions) and their properties.
Review of Research into Enterprise Bankruptcy Prediction in Selected Central and Eastern European Countries
- Błażej Prusak
2018 Full text International Journal of Financial Studies
In developed countries, the first studies on forecasting bankruptcy date to the early 20th century. In Central and Eastern Europe, due to, among other factors, the geopolitical situation and the introduced economic system, this issue became the subject of researcher interest only in the 1990s. Therefore, it is worthwhile to analyze whether these countries conduct bankruptcy risk assessments and what their level of advancement is. The main objective of the article is the review and assessment of the level of advancement of bankruptcy prediction research in countries of the former Eastern Bloc, in comparison to the latest global research trends in this area. For this purpose, the method of analyzing scientific literature was applied. The publications chosen as the basis for the research were mainly based on information from the Google Scholar and ResearchGate databases during the period Q4 2016–Q3 2017. According to the author’s knowledge, this is the first such large-scale study involving the countries of the former Eastern Bloc—which includes the following states: Poland, Lithuania, Latvia, Estonia, Ukraine, Hungary, Russia, Slovakia, Czech Republic, Romania, Bulgaria, and Belarus. The results show that the most advanced research in this area is conducted in the Czech Republic, Poland, Slovakia, Estonia, Russia, and Hungary. Belarus Bulgaria and Latvia are on the other end. In the remaining countries, traditional approaches to predicting business insolvency are generally used.
Revitalization of the Narrow-Gauge Żuławy Commuter Railway and its effect on shipping conditions in the Vistula delta
- Patrycja Jerzyło
- Aleksandra Wawrzyńska
- Adam Bolt
2018 Full text E3S Web of Conferences
The article presents the Żuławy Access Railway and the effect of its revitalization on the change of navigational conditions in the Vistula delta. One of the problems analyzed in the article is the intersection of two different transport branches - the inland waterway and rail transport branches. A solution to the problem of their functioning is presented, without any major restrictions. Possible changes in navigational conditions have been described on Martwa Wisła and Przekop Wisły after revitalization of a narrow-gauge railway. The aim of the work is to indicate the optimal solution, taking into account the needs, benefits and possible limitations, and the method of their leveling. The current conditions prevailing in the Vistula delta have been described, obstacles and navigational difficulties, as well as the intensity of unit traffic have been characterized.
Rewitalizacja jako zintegrowany proces budowania potencjałów wewnątrz miejskich obszarów rozwojowych na przykładzie hamburskiej strategii Skoku przez Łabę
- Gabriela Maria Rembarz
- Weronika Denga
2018 Full text Studia Komitetu Przestrzennego Zagospodarowania Kraju PAN
Polityka Hamburga w ramach strategii Skok przez Łabę jest przykładem aktualnego kierunku odnowy miasta wychodzącej poza klasyczną rewitalizację. Poprawa jakości, udoskonalenie struktur miejskich, wymaga w obszarach problemowych niekonwencjonalnego podejścia zarówno w fazie wyznaczania docelowych standardów, jak i na etapie wdrażania rozwiązań. Dzielnice w widłach rzeki Łaby, lewobrzeżne strefy poportowe Hamburga, objęte zostały w latach 2006-13 statusem IBA Hamburg (International Building Exhibition). Rejon Wilhelmsburga stał się miejscem realizacji innowacyjnej urbanistycznej strategii pod hasłem odnawialnego miasta przygotowującej Wyspę do nowoczesnej polityki wewnętrznego rozwoju. Wnioski z analizy procesu odnowy dokonanej w ramach IBA Hamburg opisanych w niniejszym artykule, odniesiono w podsumowaniu do uwarunkowań polskich, reprezentowanych przez przykład procesu rewitalizacji w dzielnicy Nowy Port w Gdańsku.
Rewitalizacja przestrzeni w kontekście zrównoważonego rozwoju - potencjał zielonych dachów
- Karolina Życzkowska
2018 Full text Studia Komitetu Przestrzennego Zagospodarowania Kraju PAN
The revitalization of space in the context of sustainable development – potential of green roof. The article shows the need to take into account the principles of sustainable development in the field of the revitalization of space, and point out green roofs as a tool in this process. It is presented in the light of the green city concept, and the criteria of the European Green City Index. The article shows the ecological, social and economic benefits of green roofs (starting from the retrieval of green areas in the urbanized space, the reduction of heat island effects, up to the integration function of green roofs), which is illustrated by a few case studies of applying green roofs within revitalization projects. The article indicates also legal incentives, as well as programs directed to the development of green roofs around the world, pointing out a range of factors to consider also for Polish cities.
Rewitalizacja Starego Fordonu. Synergia działań społecznych i przestrzennych
- Ewa Raczyńska-Mąkowska
2018 Full text
Stary Fordon jest dawnym miasteczkiem wchłoniętym w 1973 roku przez Bydgoszcz. Jego historia sięga wieku XIV w. i jest nierozerwalnie związana z położeniem nad Wisłą oraz trzema nacjami, które zamieszkiwały obok siebie: Polakami, Niemcami i żydami. Utrata autonomii w drugiej połowie XX wieku spowodowała z jednej strony degradację przestrzeni, a z drugiej powolne odbudowywanie lokalnej tożsamości. W rozprawie podjęto próbę wielowątkowej analizy uwarunkowań składających się na sytuację w jakiej znajduje się to dawne miasteczko u progu niezbędnej obecnie rewitalizacji. Wielokontekstowe powiązania badanych zagadnień skierowały badania ku definiowaniu Starego Fordonu jako MIEJSCA w znaczeniu przestrzenno-społecznym, sprecyzowanym w pracy. Przeprowadzone analizy pokazują, że przewidując w rewitalizacji synergię działań, począwszy od definiowania celów po ich realizację, można osiągnąć powodzenie procesu odnowy, również społecznej. Stworzenie enklawy miejskiej o silnych cechach indywidualnych wymaga użycia zróżnicowanych narzędzi, które decydować będą o docelowym wizerunku dawnego miasta. Na uwagę zasługują badania przestrzeni publicznych metodą "research by design" przy zaangażowaniu studentów. W rozprawie przedstawiono możliwości prowadzenia działań o różnym charakterze i skali w obrębie analizowanych obszarów. Wyodrębniono cele, których realizacja pozwoli przekształcić Stary Fordon w miejsce o zrewitalizowanej fizycznej i społecznej przestrzeni, korzystające z atrakcyjnego położenia i rozwijające się dzięki nowoczesnej społeczności, świadomej swojej tożsamości.
Rewitalizacja Warszawskiej Rotundy PKO BP - przeszłość i współczesność
- Dariusz Kowalski
2018 Full text
Charakterystycznym miejscem centrum śródmieścia Warszawy, powszechnie znanym zarówno w kraju jak za granicami naszego kraju był dotychczas, i miejmy nadzieję nadal będzie, okrągły budynek z charakterystycznym pilaście ukształtowanym obrysem wieńczącego go skośnego dachu - obiekt Warszawskiej Rotundy. Rotunda usytuowana przy skrzyżowaniu ulicy Marszałkowskiej i Alei Jerozolimskich - w pobliżu Ronda Dmowskiego w Warszawie jest obiektem, który wkrótce uzyskana nową, współczesną odsłonę architektoniczną. Sam budynek Rotundy budzi w mieszkańcach Warszawy wiele sprzecznych emocji zarówno pod względem architektonicznym jak i przeznaczenia, ale na przestrzeni ponad 50 lat swego istnienia oraz tragicznej historii stał się on w części symbolem tego miasta jak i miejsca w którym się znajduje. Obiekt ten już od początku planów projektowych związanych z budową nowej infrastruktury wschodniej strony centralnego placu Warszawy przeznaczony był na cele biurowe i projektowany był jako obiekt biurowy z przeznaczeniem na oddział bankowy. Od samego początku istnienia w obiekcie swoją siedzibę miał w nim oddział banku PKO BP, który zajmował cały obiekt a on sam dostępny był zarówno dla klientów indywidualnych i jaki podmiotów gospodarczych. Sposób jego wykorzystania zmieniał się zgodnie z postępem czasu ale do ostatniego klienta – jaki odwiedził bank 23.12.2016r. pozostał obiektem bankowym. W czasach minionych, pomimo bankowej funkcji obiektu z której nie wszyscy korzystali, obiekt jak a szczególnie teren wokół niego był miejscem spotkań i umawiania się warszawiaków jak i osób przyjezdnych - punktem który był początkiem wielu dróg wycieczek po Warszawie.
Rewitalizacyjny Living Lab jako metoda generowania i wdrażania innowacji na rzecz odnowy inteligentnego miasta na przykładzie dzielnicy Orunia w Gdańsku
- Gabriela Maria Rembarz
2018 Full text Studia Komitetu Przestrzennego Zagospodarowania Kraju PAN
W artykule poruszono kwestię możliwości wykorzystania w uspołecznieniu formuły pracy nad rewitalizacją modelu living lab tzw. żywego (żyjącego) laboratorium. Na tle przykładów praktyki zagranicznej (USA, Niemcy) dokonano odniesienia do doświadczeń polskich zebranych przez Autorkę w ramach współpracy ze społecznością gdańskiej dzielnicy Orunia - św. Wojciech. Zespół naukowy KUiPR WAPG Katedry Urbanistyki i Planowania Regionalnego Wydziału Architektury Politechniki Gdańskiej (kierownik G.Rembarz) zrealizował w okresie 2010-2018 szereg przedsięwzięć, które określić można jako urbanistyczne badania nad procesem rewitalizacji w niesformalizowanym modelu rewitalizacyjnego living lab (R_LLO). Współpraca wychodząca poza dotychczasową konwencję relacji uczelni z dzielnicowymi aktywistami lokalnymi, stała się możliwe dzięki ścisłemu partnerstwu zespołu KUiPR WAPG z Gdańską Fundacją Innowacji Społecznej (GFIS) – organizacją pozarządową pełniącą rolę fasylitatora aktywności i działań lokalnych w oparciu o dzielnicowy dom sąsiedzki Gościnna Przystań.
REWIZJA PRZYBLIŻONYCH METOD OBLICZANIA OPORU CAŁKOWITEGO KADŁUBA W OPARCIU O BADANIA MODELOWE WYBRANEGO JACHTU ŻAGLOWEGO
- Artur Karczewski
- Hanna Pruszko
- Anna Malinowska
2018 Prace Wydziału Nawigacyjnego Akademii Morskiej w Gdyni
Rewizja opiera się na weryfikacji wybranych przybliżonych metod prognozowania oporu całkowitego gołego kadłuba opracowanych w wyniki badań systematycznej serii kadłubów jachtów żaglowych w latach od 1973 do 2010 znanych, jako The Delft Systematic Yacht Hull Series (DSYHS). Zademonstrowano wyniki otrzymane w oparciu o wzory przybliżone (Metoda Delft), obliczenia numeryczne (CFD) i badania modelowe dla wybranego jachtu żaglowego o nowoczesnym kształcie kadłuba wraz z ich dyskusją.
Rheological properties, oxidative and thermal stability, and potential application of biopolyols prepared via two-step process from crude glycerol
- Aleksander Hejna
- Paulina Kosmela
- Marek Klein
- Kamila Gosz
- Krzysztof Formela
- Józef Haponiuk
- Łukasz Piszczyk
2018 POLYMER DEGRADATION AND STABILITY
In this work, previously synthesized biopolyols were analyzed in terms of their rheological and thermal properties, very important from the technological point of view. For better evaluation of performed synthesis, the influence of its time and temperature on the properties of biopolyols was determined. In the end, obtained materials were used to prepare rigid polyurethane-polyisocyanurate (PUR-PIR) foams, to evaluate their potential application in polymer technology. Presented results fully justified conducting of synthesis in two steps. Biopolyols obtained after second step of synthesis were characterized by two times lower viscosity than polyglycerols resulting from first step. Moreover, their thermal and oxidative stability was noticeably higher and enabled their effective incorporation into manufacturing of PUR-PIR foams. Spectroscopic and microscopic analysis confirmed that foams were successfully obtained from polyglycerols and biopolyols, however, there were noticeable differences in the mechanical performance of prepared materials. Partial substitution of petrochemical polyol with polyglycerol resulted in the decrease of compressive strength, comparing to reference sample, while incorporation of biopolyols noticeable enhanced that parameter.
Rhythm and Colours of the Angles
- Krzysztof Wróblewski
2018
ABSTRACT The game of space was and still is a crucial aspect of visual arts. The aim of this study is to examine how the arrangement of hues, rhythms and angles of various polygons can create an impression of depth and movement on a flat surface. The so-called Penrose tiling and Ulam's spiral are mathematical models that have been applied for the painting experiment. There is a vast amount of evidence gathered over the ages that shows art is strictly interrelated with science. It refers to music, literature, architecture and the visual arts as well. Since the Renaissance, painters and architects have employed descriptive geometry, mathematics and linear perspective in order to operate with right proportions but also to create both the illusion and distortion of space. At the beginning of the twentieth century, painters released themselves from realism and gained a new approach towards the picture. Discoveries from natural science allowed them to perceive the phenomenon of light and colour as a vibration of wavelengths. When Euclidean geometry was abandoned, the non-Euclidean space-time universe and the quantum realm came on stage together with the various types of abstract art, which are still present in our postmodern era. In the mid-seventies of the last century, English mathematician and physicist Roger Penrose published a non-periodic set of patterns. These constructions have been based on the five-fold symmetry. During my painting experiment the polygons shaped by Penrose were deconstructed through additional axes of symmetry. I applied sequences of primary and secondary colours onto the new structure. This operation revealed an unexpected rhythm of shapes and colour configurations. Although a new space was opened, the original symmetry remained. A similar study was carried out with the use of Ulam's spiral, which is a graphical layout of prime numbers. In this case, the primes appear on a quadratic lattice in diagonal, vertical and horizontal rows, creating unique patterns, irregular intervals and gaps. The main finding of this artistic and theoretical study is the statement that each irregularity has its own logic and order. The non-periodical nets of shapes and colour shades reflect the complex structure of the entire universe.
Ripple oscillations in the left temporal neocortex are associated with impaired verbal episodic memory encoding
- Zachary Waldman
- Liliana Camarillo-Rodriguez
- Inna Chervenova
- Brent Berry
- Shoichi Shimamoto
- Bahareh Elahian
- Michał Tomasz Kucewicz
- Chaitanya Ganne
- Xiao-Song He
- Leon A. Davis
- Joel Stein
- Sandhitsu R. Das
- Richard Gorniak
- Ashwini D. Sharan
- Robert E. Gross
- Cory S. Inman
- Bradley C. Lega
- Kareem Zaghloul
- Barbara C. Jobst
- Kathryn A. Davis
- Paul Wanda
- Mehraneh Khadjevandf
- Joseph Tracy
- Daniel S. Rizzuto
- Gregory Worrell
- Michael R. Sperling
- Shennan A. Weiss
2018 EPILEPSY & BEHAVIOR
BACKGROUND: We sought to determine if ripple oscillations (80-120 Hz), detected in intracranial electroencephalogram (iEEG) recordings of patients with epilepsy, correlate with an enhancement or disruption of verbal episodic memory encoding. METHODS: We defined ripple and spike events in depth iEEG recordings during list learning in 107 patients with focal epilepsy. We used logistic regression models (LRMs) to investigate the relationship between the occurrence of ripple and spike events during word presentation and the odds of successful word recall following a distractor epoch and included the seizure onset zone (SOZ) as a covariate in the LRMs. RESULTS: We detected events during 58,312 word presentation trials from 7630 unique electrode sites. The probability of ripple on spike (RonS) events was increased in the SOZ (p < 0.04). In the left temporal neocortex, RonS events during word presentation corresponded with a decrease in the odds ratio (OR) of successful recall, however, this effect only met significance in the SOZ (OR of word recall: 0.71, 95% confidence interval (CI): 0.59-0.85, n = 158 events, adaptive Hochberg, p < 0.01). Ripple on oscillation (RonO) events that occurred in the left temporal neocortex non-SOZ also correlated with decreased odds of successful recall (OR: 0.52, 95% CI: 0.34-0.80, n = 140, adaptive Hochberg, p < 0.01). Spikes and RonS that occurred during word presentation in the left middle temporal gyrus (MTG) correlated with the most significant decrease in the odds of successful recall, irrespective of the location of the SOZ (adaptive Hochberg, p < 0.01). CONCLUSION: Ripples and spikes generated in the left temporal neocortex are associated with impaired verbal episodic memory encoding. Although physiological and pathological ripple oscillations were not distinguished during cognitive tasks, our results show an association of undifferentiated ripples with impaired encoding. The effect was sometimes specific to regions outside the SOZ, suggesting that widespread effects of epilepsy outside the SOZ may contribute to cognitive impairment.
Risk Diagnosis and Management with BBN for Civil Engineering Projects during Construction and Operation
- Marian Witold Kembłowski
- Beata Grzyl
- Agata Siemaszko
- Adam Kristowski
2018 Full text E3S Web of Conferences
The authors demonstrate how expert knowledge about the construction and operation phases combined with monitoring data can be utilized for the diagnosis and management of risks typical to large civil engineering projects. The methodology chosen for estimating the probabilities of risk elements is known as Bayesian Belief Networks (BBN). Using a BBN model one can keep on updating the risk event probabilities as the new evidence (monitoring information) becomes available. Furthermore, the updated probabilities estimated using the available data for the construction phase serve as background information for the subsequent phase. The integrated two-object model of construction-operation may be then used to optimize the decision making, thus minimizing the risks. To better show how the proposed approach works the authors use the example of the road tunnel constructed and operated under the Dead Vistula River in Gdansk.
Risk sharing in the construction work contracts
- Magdalena Apollo
- Agata Siemaszko
- Adam Kristowski
2018 Full text
By signing a contract for construction works each of the parties assumes a specific scope of responsibility. In practice, there are numerous examples of contractual provisions that violate the parties’ safety and the balance of fair and even distribution of risk. Asymmetry in risk allocation in construction contracts and its consequences is the most common cause of disputes between the parties. The article presents the issue of risk distribution and its consequences on the example of selected construction contracts provisions.
Risking It All or Here Comes the Flood
- Hanna Obracht-Prondzyńska
- Karl Eriksson
2018
The professional reality is interdisciplinary! When city transformation and evolution starts, what are the tools for successful strategies for urban interventions? How does digital planning for digital fabrication processes look like? How dedicated are the new professionals? And how does this all influence the future of bridge design? More than 60 students representing various disciplines of built environment and working together in international and interdisciplinary mixed project groups at the second think the link—Baltic International Summer School (B.I.S.S.) analyzed these and other questions. The B.I.S.S., launched by the HafenCity University Hamburg together with eight international partner universities from the Baltic Sea region, aims to develop, test and implement new ways of interdisciplinary teaching, learning and designing. It also searches for ties and correlations between experiences, cultures and cities, in particular around the infrastructural juncture along the Elbe Bridges, which was chosen as the area to be explored and worked on for 2016’s “Hamburg 2030—Urban Futures” topic. This publication serves as a source book for fresh and unconventional urban development and intervention in harbor cities as well as an inspiration for successful interdisciplinary working, teaching and learning. On top, it gives a full documentation of the B.I.S.S. and expert comments on the 15 interdisciplinary projects that were devised during the ten-day workshop in Hamburg in 2016.
Risks associated with the transportation of hazardous materials on public roads
- Eligiusz Mieloszyk
- Anita Milewska
2018 Full text MATEC Web of Conferences
A significant proportion of the transport of hazardous materials is carried out on public roads. Therefore, the safety of such transport is becoming increasingly important. Every catastrophe involving hazardous materials has a negative impact on direct road users and the surrounding environment, becauses its range is mostly not local. It follows that in the event of such catastrophe, its effects should be minimized. This is possible only when we know the mechanism of spreading effects of a catastrophe involving hazardous materials. Those effects are spread by two basic media: ground (in particular water in the ground) and air. Sometimes those effects are spread by water, while the catastrophe has occurred near a water reservoir or watercourse with a free flow surface. In extreme cases, this can even lead to an ecological disaster. Dynamic systems, especially those with distributed parameters, can be used to describe the mechanism of the disaster's spread. Properties of phenomena accompanying analyzed catastrophes are well reflected in their linear or non-linear mathematical models, which are analyzed by various operator methods.
River Flow Simulation Based on the HEC-RAS System
- Zdzisław Kowalczuk
- Mateusz Świergal
- Mirosław Wróblewski
2018 Advances in Intelligent Systems and Computing
This work considers the problem of river floods, and presents a computer solution that can be used to predict such a threat. The basic tool, called Hydrologic Engineering Centers for River Analysis System (HEC-RAS), and created by the US Army Corps of Engineering, is well developed; and the models created in the system HEC-RAS are quite realistic. For the purpose of solving practical national flood problems, simplified static and dynamic models of the river Vistula were created in the system HEC-RAS. Furthermore, in this paper, the results of the performed simulations for flood problems in the Vistula basin are presented.