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Gdańsk University of Technology

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Publications from the year 2021

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  • Prawne aspekty gospodarki obiegu zamkniętego
    • Roksana Bochniak
    • Aleksandra Gołąbek
    • Paweł Dąbrowski
    • Dariusz Mikielewicz
    2021 Przegląd Komunalny

    Rozmaite organizacje od lat podejmują szereg prac mających na celu skierowania gospodarki na model o obiegu zamkniętym. Tego typu działania mają pomóc w ograniczeniu negatywnego wpływu przemysłu na środowisko. Jakie są słabe i mocne strony sytuacji prawnej w tym zakresie i jakie niesie to za sobą skutki? W ostatnich latach obserwuje się dynamiczny rozwój światowej gospodarki, który wpływa nie tylko na stale rosnący poziom życia, ale także na środowisko naturalne, którego degradacja gwałtownie postępuje. Aby spowolnić ten proces, na świecie zaczęto wprowadzać szeroko zakrojone zmiany legislacyjne oraz rozpoczęto prace nad rozwiązaniami technologicznymi przyjaznymi środowisku. Rosnące zużycie surowców i nieodnawialnych źródeł energii zmusza przedsiębiorców na całym świecie do poszukiwania nowych zamienników, najlepiej pochodzenia naturalnego. Organizacje takie jak Unia Europejska od lat podejmują działania mające na celu skierowanie gospodarki na model o obiegu zamkniętym, co mogłoby pomóc w ograniczeniu negatywnego wpływu przemysłu na środowisko.

  • Preconcentration and Analytical Methods for Determination of Methyl Tert-Butyl Ether and Other Fuel Oxygenates and Their Degradation Products in Environment: A Review
    • Sayyed Hossein Hashemi
    • Massoud Kaykhaii
    • Majid Mirmoghaddam
    • Grzegorz Boczkaj
    2021 CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY

    Fuel oxygenates (FOs) are mainly ethers or alcohols which are added to gasoline either to boost the octane number or to make the fuel burning process more "cleaner" with increasing the oxygen content, or to obtain a combination of both effects. FOs are water soluble with high mobility in the environment which presence even at very low concentrations lower the quality of water making it unsafe or unpleasant due to their objectionable taste and/or odor. Thus, their determination at trace in environmental samples is of high importance because of their sparingly bio-degradability and their biological hazards. Instruments such as gas chromatography, Fourier transform infrared spectroscopy and ion mobility spectrometry are mainly used for the determination of FOs. However, the main challenge for determination of such oxygenates relates to proper sample preparation. Dilute or complex samples often demand a specific treatment to ensure effective enrichment of FOs before their detection. The main techniques used for this purpose are purge and trap, membrane extraction, and solid phase microextraction. This review presents a comprehensive evaluation of extraction/preconcentration techniques and analytical methods for determination of FOs in environmental samples. Advantages and disadvantages of each method are discussed in details along with critical evaluation of currently available methods.

  • Predicting the peak structural displacement preventing pounding of buildings during earthquakes
    • Seyed Mohammad Khatami
    • Hosein Naderpour
    • Alireza Mortezaei
    • S T. Tafreshi
    • Anna Jakubczyk-Gałczyńska
    • Robert Jankowski
    2021 Full text Journal of Physics : Conference Series

    The aim of the present paper is to verify the effectiveness of the artificial neural network (ANN) in predicting the peak lateral displacement of multi-story building during earthquakes, based on the peak ground acceleration (PGA) and building parameters. For the purpose of the study, the lumped-mass multi-degree-of-freedom structural model and different earthquake records have been considered. Firstly, values of stories mass and stories stiffness have been selected and building vibration period has been automatically calculated. The ANN algorithm has been used to determine the limitation of the peak lateral displacement of the multi-story building with different properties (height of stories, number of stories, mass of stories, stiffness of stories and building vibration period) exposed to earthquakes with various PGA. Then, the investigation has been focused on critical distance between two adjacent buildings so as to prevent their pounding during earthquakes. The proposed ANN has logically predicted the limitation of the peak lateral displacement for the five-story building with different properties. The results of the study clearly indicate that the algorithm is also capable to properly predict the peak lateral dis-placements for two buildings so as to prevent their pounding under different earthquakes. Subsequently, calculation of critical distance can also be optimized to save the land and provide the safety space between two adjacent buildings prone to seismic excitations.

  • Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition
    • Farzin Kazemi
    • Benyamin Mohebi
    • Robert Jankowski
    2021 Full text MECHANICAL SYSTEMS AND SIGNAL PROCESSING

    Severe damages of adjacent structures due to structural pounding during earthquakes have emphasized the need to use some seismic retrofit strategy ‎to enhance the structural performance. ‎The purpose of this paper is to study the influence of using linear and nonlinear Fluid Viscous Dampers (FVDs) on the seismic collapse capacities of adjacent structures prone to pounding and proposing modification factors to modify the ‎median collapse capacity of structures considering the effects of pounding. The factors can be used ‎to predict the collapse capacity of structures in pounding ‎condition. A seismic retrofit strategy employs FVDs installed in ‎‎3-, 6- and 9-story Special Moment Resisting Frames (SMRFs). The‏ ‏SMRFs‎‏‎ were assumed to have ‏different values of separation distance according to the seismic code. To ‎‏model pounding phenomenon, ‏linear viscoelastic contact elements were used in the OpenSees software. Furthermore, to determine the seismic collapse capacities of each structure, the proposed algorithm was applied to remove the collapsed structure during the incremental dynamic analysis. The results of the analyses illustrate that the ‎existence of FVDs can substantially improve the seismic behavior of structures having a significant influence ‎on the collapse capacities of colliding structures. Moreover, considering the ‎adjacent SMRFs in one or two ‎sides of the main structure can significantly affect the median collapse ‎‏capacity of the main‎ structure itself. ‎‎Finally, the proposed modification ‎factors can be successfully used to estimate the effects of pounding on the ‎collapse capacities of adjacent structures.

  • Prediction of energy consumption and evaluation of affecting factors in a full-scale WWTP using a machine learning approach
    • Faramarz Bagherzadeh
    • Amirreza Shojaei Nouri
    • Mohammad Javad Mehrani
    • Suresh Thennadil
    2021 Full text PROCESS SAFETY AND ENVIRONMENTAL PROTECTION

    Treatment of municipal wastewater to meet the stringent effluent quality standards is an energy-intensive process and the main contributor to the costs of wastewater treatment plants (WWTPs). Analysis and prediction of energy consumption (EC) are essential in designing and operating sustainable energy-saving WWTPs. In this study, the effect of wastewater, hydraulic, and climate-based parameters on the daily consumption of EC by East Melbourne WWTP was investigated based on the data collected over six years (2014-2019). Data engineering methods were applied to combine features from different resources. To this end, four various feature selection (FS) algorithms were used to reveal the relations among those variables and to select the most relevant variables for training the machine learning (ML) models. Further, the application of artificial neural networks (ANN) and two decision tree algorithms of Gradient Boosting Machine (GBM), and Random Forest (RF) were studied to predict EC records followed by a 95% confidence interval assessment. Results of FS algorithms revealed that total nitrogen, chemical oxygen demand (COD), and inflow-flow had the highest impact on WWTP energy consumption. Moreover, GBM had the best performance prediction among all other regression algorithms. 95% of confidence interval showed a reasonable prediction error band (±68 MWh/Day).

  • Prediction of protein assemblies, the next frontier: The CASP14‐CAPRI experiment
    • Marc F. Lensink
    • Guillaume Brysbaert
    • Théo Mauri
    • Nurul Nadzirin
    • Sameer Velankar
    • Raphael A. G. Chaleil
    • Tereza Clarence
    • Paul A. Bates
    • Ren Kong
    • Bin Liu
    • Guangbo Yang
    • Ming Liu
    • Hang Shi
    • Xufeng Lu
    • Shan Chang
    • Raj S. Roy
    • Farhan Quadir
    • Jian Liu
    • Jianlin Cheng
    • Anna Antoniak
    • Cezary Czaplewski
    • Artur Giełdoń
    • Mateusz Kogut
    • Agnieszka G. Lipska
    • Adam Liwo
    • Emilia Lubecka
    • Martyna Maszota‐Zieleniak
    • Adam K. Sieradzan
    • Rafał Ślusarz
    • Patryk A. Wesołowski
    • Karolina ZiĘba
    • Carlos A. Del Carpio Muñoz
    • Eiichiro Ichiishi
    • Ameya Harmalkar
    • Jeffrey J. Gray
    • Alexandre M. J. J. Bonvin
    • Francesco Ambrosetti
    • Rodrigo Vargas Honorato
    • Zuzana Jandova
    • Brian Jiménez‐García
    • Panagiotis I. Koukos
    • Siri Van Keulen
    • Charlotte W. Van Noort
    • Manon Réau
    • Jorge Roel‐Touris
    • Sergei Kotelnikov
    • Dzmitry Padhorny
    • Kathryn A. Porter
    • Andrey Alekseenko
    • Mikhail Ignatov
    • Israel Desta
    • Ryota Ashizawa
    • Zhuyezi Sun
    • Usman Ghani
    • Nasser Hashemi
    • Sandor Vajda
    • Dima Kozakov
    • Mireia Rosell
    • Luis A. Rodríguez‐Lumbreras
    • Juan Fernandez‐Recio
    • Agnieszka Karczynska
    • Sergei Grudinin
    • Yumeng Yan
    • Hao Li
    • Peicong Lin
    • Sheng‐You Huang
    • Charles Christoffer
    • Genki Terashi
    • Jacob Verburgt
    • Daipayan Sarkar
    • Tunde Aderinwale
    • Xiao Wang
    • Daisuke Kihara
    • Tsukasa Nakamura
    • Yuya Hanazono
    • Ragul Gowthaman
    • Johnathan D. Guest
    • Rui Yin
    • Ghazaleh Taherzadeh
    • Brian G. Pierce
    • Didier Barradas‐Bautista
    • Zhen Cao
    • Luigi Cavallo
    • Romina Oliva
    • Yuanfei Sun
    • Shaowen Zhu
    • Yang Shen
    • Taeyong Park
    • Hyeonuk Woo
    • Jinsol Yang
    • Sohee Kwon
    • Jonghun Won
    • Chaok Seok
    • Yasuomi Kiyota
    • Shinpei Kobayashi
    • Yoshiki Harada
    • Mayuko Takeda‐Shitaka
    • Petras J. Kundrotas
    • Amar Singh
    • Ilya A. Vakser
    • Justas DapkŪnas
    • Kliment Olechnovič
    • Česlovas Venclovas
    • Rui Duan
    • Liming Qiu
    • Shuang Zhang
    • Xiaoqin Zou
    • Shoshana J. Wodak
    2021 PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS

    We present the results for CAPRI Round 50, the 4th joint CASP-CAPRI protein assembly prediction challenge. The Round comprised a total of 12 targets, including 6 dimers, 3 trimers, and 3 higher-order oligomers. Four of these were easy targets, for which good structural templates were available either for the full assembly, or for the main interfaces (of the higher-order oligomers). Eight were difficult targets for which only distantly related templates were found for the individual subunits. Twenty-five CAPRI groups including 8 automatic servers submitted ~1250 models per target. Twenty groups including 6 servers participated in the CAPRI scoring challenge submitted ~190 models per target. The accuracy of the predicted models was evaluated using the classical CAPRI criteria. The prediction performance was measured by a weighted scoring scheme that takes into account the number of models of acceptable quality or higher submitted by each group as part of their 5 top-ranking models. Compared to the previous CASP-CAPRI challenge, top performing groups submitted such models for a larger fraction (70–75%) of the targets in this Round, but fewer of these models were of high accuracy. Scorer groups achieved stronger performance with more groups submitting correct models for 70–80% of the targets or achieving high accuracy predictions. Servers performed less well in general, except for the MDOCKPP and LZERD servers, who performed on par with human groups. In addition to these results, major advances in methodology are discussed, providing an informative overview of where the prediction of protein assemblies currently stands.

  • PREDICTION OF SHIP MOTIONS IN IRREGULAR WAVES BASED ON RESPONSE AMPLITUDE OPERATORS EVALUATED EXPERIMENTALLY IN NOISE WAVES
    • Sebastian Bielicki
    2021 Full text Polish Maritime Research

    The most common methods for predicting ship roll motions in a specified sea state are direct measurements of motions in a representative irregular wave realisation (time domain) or calculations of motions from response amplitude operators (RAOs) in the frequency domain. The result of the first method is valid only for the tested sea state, whilst the second method is more flexible but less accurate. RAO-based predictions are calculated assuming a linear model of ship motions in waves. RAO functions are usually evaluated by means of tests in regular waves for a limited number of frequencies and a constant wave amplitude. This approach is time-consuming and the discrete form of the RAO functions obtained for a limited number of frequencies may lead to discrepancies in the prediction of seakeeping and often does not allow the actual amplitude of the response in resonant frequency to be determined. Another challenge is the appropriate selection of wave amplitude for tests due to the considerable influence of viscous damping on roll response in irregular sea waves. There are alternative methods for the experimental determination of RAO functions and one of them is presented in this study. The presented approach allows RAO functions to be evaluated in one run by the generation of irregular waves characterised by a white or coloured noise spectrum. This method reduces the experiment duration, with almost continuous RAO characteristics obtained. The flat (white noise) and linear (coloured noise) wave spectral energy characteristics are considered in the experiment and the obtained predictions are compared with the results of accurate measurements in irregular waves.

  • Preliminary safety assessment of Polish interchanges
    • Marcin Budzyński
    • Agnieszka Tubis
    • Mateusz Rydlewski
    2021 Full text Archives of Transport

    Interchanges are a key and the most complex element of a road infrastructure. The safety and functionality of interchanges determine the traffic conditions and safety of the entire road network. This applies particularly to motorways and express-ways, for which they are the only way to access and exchange traffic. A big problem in Poland is the lack of comprehensive tools for designers at individual stages of the design process. This applies to guidelines or other documents regarding the location, choice of interchanges type and selection of design parameters. This does not provide sufficient material for designing safe and functional interchanges. This situation results in numerous hazards that occur on existing interchanges and errors that are still being made at all stages of the design process. Consequently, there is a risk of accidents in the area of interchanges, which often have serious consequences. The purpose of the research presented in the article is to identify main groups of hazards on the interchanges and to classify them based on field tests and audits of project documentation. The prepared classification uses the results of analyzing data on road accidents. As part of the research, a database was built that includes information on road accidents and traffic, as well as data on all existing interchanges on motorways and expressways in Poland. These data includes: inter-change type, length of exit and entry lanes, total interchanges length, type of cross-section on main roads and ramps. The number and type of ramps occurring at a given interchange as well as the type of intersections, if any, were also taken into account. Based on the assessment, the level of safety was determined for individual types of interchanges. Then, the impact of se-lected road and traffic factors on safety was presented. The critical elements of interchanges are entries, exits, weaving sections and intersections. Assumptions were also adopted for the classification of identified hazards. A comprehensive safety assessment for interchanges allowed the development of assumptions for their design guidelines. On the basis of database exploration and field research, the main problems and hazards regarding the functioning of interchanges were identified.

  • Preparation and Characterization of Films Based on Disintegrated Bacterial Cellulose and Montmorillonite
    • Agata Sommer
    • Hanna Staroszczyk
    • Izabela Sinkiewicz
    • Piotr Bruździak
    2021 Full text JOURNAL OF POLYMERS AND THE ENVIRONMENT

    The food packaging materials from natural polymers including polysaccharides offer an ecologically important alternative to commonly used synthetic, non-biodegradable counterparts. The purpose of this work was to modify of bacterial cellulose (BC) leading to the improvement of its functional properties in terms of use as a food packaging material. Effects of disintegration of BC and addition of montmorillonite (MMT) on its water barrier, mechanical and thermal properties were investigated. Disintegration of BC increased its water vapour permeability (WVP) and thermal stability, but decreased its tensile strength (σ). These changes were closely related to the rearrangement of hydrogen-bond network in the BC structure, resulting in a partial conversion from the Iα to Iβ allomorph. The addition of 2% of MMT did not affect WVP and σ of the disintegrated BC (bBC), while the plasticization of the modified bBC generally decreased WVP, and did not increase σ. The improvement in water barrier properties of bBC modified by adding 2% of MMT in the presence of glycerol was caused by the formation of hydrogen bonds between the components of the composite. The results presented show the potential usefulness of BC modified by disintegration and adding 2% of MMT and 10–15% of glycerol as a food packaging material.

  • Preparation of Well-Compatibilized PP/PC Blends and Foams Thereof
    • Lidia Jasińska-Walc
    • Rob Duchateau
    • Miloud Bouyahyi
    • Jakub Kruszyński
    • Agnieszka Tercjak
    • Artur Różański
    • Enrico Troisi
    • Yingxin Liu
    • Lanti Yang
    • Maciej Sienkiewicz
    • Ostap Ivashkiv
    2021 ACS Applied Polymer Materials

    The performance of polypropylene-poly(ethylene brassylate) block and graft copolymers and a polypropylene-polycaprolactone graft copolymer as compatibilizers for polypropylene-rich polypropylene/bisphenol A polycarbonate (PP/PC, 80/20 wt/wt) blends was elucidated. The copolymers were synthesized either by metal-catalyzed ring-opening polymerization or transesterification of a presynthesized polyester, initiated by hydroxyl-functionalized PPs, which themselves were obtained by catalytic routes or reactive extrusion, respectively. Spectroscopic fingerprints of the copolymers from liquid-state nuclear magnetic resonance (NMR) in combination with scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), dynamic mechanical thermal analysis (DMTA), and rheology analyses of the blends indicated that the compatibilizers spontaneously organize at the interface of the two immiscible polymers leading to the formation of uniform, stable, nanophase morphologies. The effect of the compatibilizers on the performance of the PP/PC blends was evaluated, and well-compatibilized PP/PC blends showed improved melt strength and strain hardening when compared to pure PP. This was verified by the successful foam extrusion using isobutane as a blowing agent of well-compatibilized PP/PC blends to low-density PP-based foams, for which normally long-chain branched PP is required.

  • Probabilistic analysis of settlements under a pile foundation of a road bridge pylon
    • Karol Winkelmann
    • Kamil Żyliński
    • Jarosław Górski
    2021 Full text SOILS AND FOUNDATIONS

    The paper addresses the reliability change of a road bridge pile foundation due to the unpredictable increase of settlements in time. The analysis is based on the Rędziński Bridge in Wrocław, Poland, its design assumptions, and monitoring results. The bridge foundation rests on a multi-layered subsoil assumed random. The Finite Element model of the subgrade is generated in ZSoil® software. To simplify the probabilistic approach, substitute soil strata stiffness parameters are adopted. Tracing their time decrement allows for a comprehensive definition of the entire foundation over-settlement produced by numerous factors. Preliminary sensitivity analysis of settlements to the stiffness variation properly simplifies the random model. The Serviceability Limit State helps to assess the foundation reliability index, further compared with the condition in the EN 1990:2002/A1:2005 standard. In addition, real-life settlements are also measured in the first year of bridge operation, they are used to calibrate the reliability index assessment. An innovative approach is proposed, where appropriate time-wise fluctuation functions represent the expected settlement increase and the related reliability reduction. These fluctuation functions help to plan the future remedial actions to maintain the initial bridge safety and to indicate the action frequency and scope. Future reliability levels may be extrapolated too. The real-life survey database of settlements makes it possible to validate the results of probabilistic calculations. A dedicated flowchart is devised to support further analysis of a wide structural domain.

  • Problematyka efektywności docierania maszynowego powierzchni płaskich i płasko-równoległych
    • Adam Barylski
    2021

    Przedstawiono sposób oceny efektywności docierania na docierarkach tarczowych. Omówiono przykładowe technologie obróbki powierzchni płaskich i płasko-równoległych. Wyznaczono składowe czasów operacji docierania wstępnego i wykończeniowego oraz wartości wskaźnika OEE dla obróbki jednotarczowej. Omówiono wyniki analiz docierania grupy 10 przedmiotów w układzie dwutarczowym. Zaprezentowano pracę zautomatyzowanego gniazda docierarek dwutarczowych firmy Peter Wolters.

  • Problematyka współczesnych ingerencji w historyczną zabudowę przemysłową na przykładzie zespołu portowo-stoczniowego w Gdyni
    • Robert Hirsch
    • Celina Łozowska
    2021 Full text Ochrona Dziedzictwa Kulturowego

    Na terenach portowo-stoczniowych Gdyni zachowanych jest wiele historycznych obiektów, które ze względu na zmiany w funkcjonowaniu portu oraz przekształcenia użytkowania terenów podlegają określonym zmianom. Najważniejsze z tych budynków są objęte ścisłą ochroną prawną poprzez wpisanie do rejestru zabytków. Zapewnia to ich zachowanie i często także rewaloryzację. Inne, także wartościowe, ale nieobjęte tak ścisłą ochroną – uwzględnione tylko w ewidencjach zabytków, podlegają adaptacjom i przebudowom, które powodują utratę niektórych walorów, ale umożliwiają przynajmniej częściowe zachowanie. Wiele budynków tego typu utraciło swoje funkcje, jest opuszczonych i oczekuje na powtórne zagospodarowanie. Ochrona zabytków w takich sytuacjach jest bardzo problematyczna i wymaga wypracowania kompromisów. Przekształcenia budynków historycznych są nieuniknione. W celu określenia zakresu ochrony i dopuszczalności ingerencji pożądane jest wypracowanie metody oceny wartości zabytkowych, która dałaby narzędzia do zobiektywizowania procesów przekształceń.

  • Problems of Active Dynamic Thermography Measurement Standardization in Medicine
    • Antoni Nowakowski
    2021 Full text Pomiary Automatyka Robotyka

    Reliability of thermographic diagnostics in medicine is an important practical problem. In the field of static thermography, a great deal of effort has been made to define the conditions for thermographic measurements, which is now the golden standard for such research. In recent years, there are more and more reports on dynamic tests with external stimulation, such as Active Dynamic Thermography, Thermographic Signal Reconstruction or Thermal Tomography. The subject of this report is a discussion of the problems of standardization of dynamic tests, the choice of the method of thermal stimulation and the conditions determining the credibility of such tests in medical diagnostics. Typical methods of thermal stimulation are discussed, problems concerning accuracy and control of resulting distributions of temperature are commented. The best practices to get reliable conditions of measurements are summarized

  • Problemy jakości w metodach Agile
    • Jarosław Kuchta
    2021

    Zwinne metody wytwarzania osiągnęły w zawrotnym tempie niebywały sukces. Według różnych doniesień od 50 do 70% firm IT stosuje metody zwinne na stałe lub okazjonalnie . Jednak znaczna część firm stosuje wybiórczo praktyki zalecane przez Agile . Jakie to praktyki? Jakie problemy występują przy ich stosowaniu i jak firmy radzą sobie z tymi problemami? Jak wpływają na jakość wytwarzanego oprogramowania? Jakie są warunki krytyczne dla zapewnienia jakości produktu? Na te pytania odpowiemy w niniejszym artykule.

  • Problemy zagrażające bezpieczeństwu dzieci i ich rodziców w ruchu drogowym podczas podróży do szkoły na przykładzie Przymorza Małego w Gdańsku
    • Ewelina Dułak
    • Agnieszka Juchum
    • Joanna Wachnicka
    2021 Full text Transport Miejski i Regionalny

    Artykuł opisuje problemy wpływające negatywnie na bezpieczeństwo ruchu drogowego na obszarze Przymorza Małego, a także przedstawia pomysły, których realizacja powinna poprawić bezpieczeństwo pieszych, rowerzystów oraz kierowców pojazdów samochodowych poruszających się po tym obszarze. W pierwszej części przedstawiono informacje dotyczące stanu aktualnego analizowanego terenu, opisano zlokalizowane tutaj placówki oświatowe, a także ulice i drogi rowerowe. Analizie poddano stan bezpieczeństwa ruchu drogowego na obszarze Przymorza Małego poprzez rozpatrzenie wypadków drogowych, które miały miejsce na jego terenie. W artykule opisano wyniki badań ankietowych dotyczących bezpieczeństwa dzieci w drodze do szkoły i przedszkola. Dokonano również analizy pomiaru prędkości chwilowej przeprowadzonej w pobliżu placówek oświatowych oraz zbadano wpływ prędkości pojazdów na bezpieczeństwo uczniów. W artykule przedstawione zostały również wyniki audytów przejść dla pieszych na analizowanym terenie, a na ich podstawie wyznaczono mankamenty przejść oraz zaproponowano pomysły ich poprawy. Na podstawie przeprowadzonych analiz, badań oraz pomiarów zdiagnozowano problemy negatywnie wpływające na poziom bezpieczeństwa ruchu drogowego na obszarze Przymorza Małego oraz zaproponowano pomysły poprawy. Słowa kluczowe: brd, droga do szkoły, bezpieczeństwo dzieci, bezpieczeństwo pieszych, uspokojenie ruchu, poprawa bezpieczeństwa.

  • Proces ciągłego doskonalenia wśród laureatów XXIII edycji Konkursu o Pomorską Nagrodę Jakości
    • Anna Wendt
    2021

    Model doskonałości można zdefiniować jako zbiór zasad kompleksowej oceny organizacji, który często wykorzystywany jest jako podstawa konkursów jakości. Europejski Model Doskonałości EFQM pozwala na doskonalenie organizacji m.in. poprzez kompleksowe podejście, identyfikację mocnych i słabych stron organizacji czy zwiększenie zaangażowania pracowników w doskonalenie. Celem niniejszego referatu jest analiza działań doskonalących zidentyfikowanych u laureatów XXIII edycji Konkursu o Pomorską Nagrodę Jakości, który tak jak Polska Nagroda Jakości swoje zasady opiera na Modelu EFQM. Analiza raportów tych jednostek dowodzi, że organizacje na najwyższym poziomie skuteczności zarządzania stosują wiele metod i narzędzi, które pozwalają na ciągłe doskonalenie procesów. Podmioty te wykazują podejście systemowe, monitorują wszystkie procesy w organizacji. Cały czas też analizują potrzeby i oczekiwania klientów. Kierownictwo daje dobry przykład i angażuje pracowników do zmian poprzez m.in. różnego rodzaju systemy motywacyjne. Otrzymane nagrody i wyróżnienia stanowią potwierdzenie zaangażowania laureatów w procesy ciągłego doskonalenia organizacji.

  • Process of Medical Dataset Construction for Machine Learning-Multifield Study and Guidelines
    • Jan Cychnerski
    • Tomasz Dziubich
    2021

    The acquisition of high-quality data and annotations is essential for the training of efficient machine learning algorithms, while being an expensive and time-consuming process. Although the process of data processing and training and testing of machine learning models is well studied and considered in the literature, the actual procedures of obtaining data and their annotations in collaboration with physicians are in most cases based on the personal intuition and suppositions of the researchers.

  • Processing, Performance Properties, and Storage Stability of Ground Tire Rubber Modified by Dicumyl Peroxide and Ethylene-Vinyl Acetate Copolymers
    • Paulina Wiśniewska
    • Łukasz Zedler
    • Krzysztof Formela
    2021 Full text Polymers

    In this paper, ground tire rubber was modified with dicumyl peroxide and a variable content (in the range of 0–15 phr) of ethylene-vinyl acetate copolymers characterized by different vinyl acetate contents (in the range of 18–39 wt.%). Modification of ground tire rubber was performed via an auto-thermal extrusion process in which heat was generated during internal shearing of the material inside the extruder barrel. The processing, performance properties, and storage stability of modified reclaimed ground tire rubber were evaluated based on specific mechanical energy, infrared camera images, an oscillating disc rheometer, tensile tests, equilibrium swelling, gas chromatography combined with a flame ionization detector, and gas chromatography with mass spectrometry. It was found that the developed formulas of modified GTR allowed the preparation of materials characterized by tensile strengths in the range of 2.6–9.3 MPa and elongation at break in the range of 78–225%. Moreover, the prepared materials showed good storage stability for at least three months and satisfied processability with commercial rubbers (natural rubber, styrene-butadiene rubber).

  • Production of six-degrees-of-freedom (6DoF) navigable audio using 30 Ambisonic microphones
    • Bartłomiej Mróz
    • Marek Kabaciński
    • Tomasz Ciotucha
    • Andrzej Rumiński
    • Tomasz Żernicki
    2021 Full text

    This paper describes a method for planning, recording, and post-production of six-degrees-of-freedom audio recorded with multiple 3rd order Ambisonic microphone arrays. The description is based on the example of recordings conducted in August 2020 with the Poznan Philharmonic Orchestra using 30 units of Zylia ZM-1S. A convenient way to prepare and organize such a big project is proposed – this involves details of stage planning, collecting needed equipment, management, and running the recording. Additionally, the placement of 2D and 360 cameras as well as the design of moving camera paths are described. Two use cases of the collected Ambisonic audio are proposed. The first one is a production of a virtual reality application using Unreal Engine 4 and Wwise. The second one uses a combination of the virtual scene from the previously mentioned application and a footage from a mobile, moving camera to create a so-called “walkthrough movie”. The proposed approach for six-degrees-of-freedom Ambisonic interpolation was evaluated on listening tests. Those tests demonstrate that it is possible to recreate a navigable 3D audio taking into account Ambisonic only input and given assumptions for microphone placement.