2017 - Publications Repository - Gdańsk University of Technology

Show publications from the year

Publications from the year 2017

Show all

Effect of package type on selected parameters of nutritional quality of chill-stored white sauerkraut
- Joanna Kapusta-Duch
- Barbara Kusznierewicz
- Teresa Leszczyńska
- Barbara Borczak
2017 Full text Polish Journal of Food and Nutrition Sciences
Brassica vegetables, including white cabbage, both fresh and sour (Brassica oleracea L. var. capitata L.), contain a lot of valuable metabolites which are effective in chemoprevention of cancer as documented by numerous studies. This work investigates the effect of different packaging types; low density polyethylene (PE-LD) and metalized polyethylene terephthalate (PET met/PE) with polyethylene bags on selected quality parameters in chill-stored white sauerkraut. Sauerkraut was subjected to refrigerated storage for 4 months. Every month, stored sauerkraut was analyzed in terms of vitamin C, total phenolic compounds content and antioxidant activity. Statistical analysis demonstrated that the type of packaging had a signifi cant infl uence on the antioxidant activity of chilled stored sauerkraut.
Effect of polymer fibres reinforcement on selected properties of asphalt mixtures
- Piotr Jaskuła
- Marcin Stienss
- Cezary Szydłowski
2017 Full text Procedia Engineering
The paper presents selected results of the research program concerning fibre reinforced asphalt concrete. Aramid-polyalphaolefin fibres was used in this study. Selected properties responsible for low temperature cracking and resistance to permanent deformation are presented in this paper. Low temperature cracking susceptibility was evaluated with the results obtained from bending test of rectangular beams with constant rate of deformation and semi-circular bending test based on fracture mechanics theory. Performance in high temperatures was assessed by master curves of dynamic modulus. Obtained results indicated that evaluated fibres can improve low temperature pavement performance.
Effect of Polymerization Statistics on the Electronic Properties of Copolymers for Organic Photovoltaics
- Gabriele Boschetto
- Hong-Tao Xue
- Jacek Dziedzic
- Michal Krompiec
- Chris-Kriton Skylaris
2017 Full text Journal of Physical Chemistry C
Statistical block copolymers, composed of donor (D) and acceptor (A) blocks, are a novel type of material for organic photovoltaics (OPVs) devices. In particular a new series of polymers based on PBTZT-stat-BDTT-8, recently developed by Merck, offers high solubility in different solvents, and a high power conversion efficiency (PCE) in different device architectures. Although it is known that the electronic properties of these materials may be significantly affected by attaching different functional groups on different blocks, it is not fully clear how important the influence of the polymer composition (i.e., the D/A block ratio) is, even if previous studies suggest that this might also have an effect. Therefore, the effect of the polymer composition in terms of HOMO, LUMO energies, and band gap was explored by studying a number of long chain oligomers with more than 1000 atoms each and with different D/A ratios. This study, that is novel both conceptually and methodologically, was made possible by using the linear-scaling reformulation of DFT implemented in the ONETEP code. Our results showed that changing the composition has a significant effect on the electronic structure of statistical copolymers, making this an alternative and suitable strategy to obtain materials with desired properties. Also, a systematic analysis of the effect of a range of different substituents placed in the D and A blocks of PBTZT-stat-BDTT-8 was performed in order to investigate how this class of materials responds to functionalization. We found that it is not possible to know a priori using chemical intuition what kind of influence different types of functional groups may have on these systems, and therefore, computational modeling is essential.
Effect of porosity on physical properties of lightweight cement composite with foamed glass aggregate
- Marzena Kurpińska
- Tomasz Ferenc
2017 Full text
This paper reports on a study of physical properties of lightweight cement composite. We investigate the possibility of replacing traditional aggregate with Granulated Ash Aggregate (GAA) and above all with Granulated Expanded Glass Aggregate (GEGA). For this purpose, 15 specimens of different percentage share of each aggregate in total aggregate volume were tested: 0%, 25%, 50%, 75% or 100% of foam glass aggregate (GEGA) partially replaced by ash aggregate (GAA) content in the cement composite. The water-cement ratio was constant and equal to w/c=0.5. Three grain sizes were analyzed: 2mm, 4mm (both GEGA) and 8mm (GAA). Numerical simulations of concrete specimen behavior under static loading were conducted with the implementation of elastic plastic model of each component. The study shows a significant impact of grain type and size on physical properties of lightweight concrete. Due to lower density of foamed glass aggregate, specimens shows various apparent density and porosity, which affect concrete properties. Compressive strength of concrete decreases with the increase in foam glass aggregate content; however specimens show different workability and in consequence porosity of lightweight concrete.
Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites
- Ewa Głowińska
- Janusz Datta
- Paulina Parcheta
2017 Full text JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
This work is mainly focused on study of thermal and thermomechanical properties of obtained bio-based polyurethane (coded as bio-PU) composites via using different types of bio-components (bio-glycol, modified soybean oil and sisal fiber) in the procedure. The chemical structure, morphology and mechanical properties were also investigated and described in this manuscript in order to know more perfect characterization of produced composites. The bio-based polyurethane matrix of composites was synthesized via prepolymer method. Bio-PU composites were produced by dispersing 5 and 15 mass% of sisal fibers into the polyurethane matrix during their synthesis. To investigate the thermal stability of sisal fibers and bio-PU composites, the thermogravimetric method (TG) was used. Thermomechanical tests were performed by means of dynamic mechanical analysis (DMA). Based on the results of thermomechanical analysis, it was found that the sisal fibers amount has the impact on storage and loss modulus. Chemical structure was confirmed by FTIR spectra. Mechanical results and scanning microscopy images of the composites showed good interfacial adhesion between sisal fibers and the bio-based PU matrix.
Effect of the Road Environment on Road Safety in Poland
- Marcin Budzyński
- Kazimierz Jamroz
- Antoniuk Marcin
2017 Full text IOP Conference Series: Materials Science and Engineering
Run-off-road accidents tend to be very severe because when a vehicle leaves the road, it will often crash into a solid obstacle (tree, pole, supports, front wall of a culvert, barrier). A statistical analysis of the data shows that Poland's main roadside hazard is trees and the severity of vehicles striking a tree in a run-off-road crash. The risks are particularly high in north-west Poland with many of the roads lined up with trees. Because of the existing rural road cross-sections, i.e. having trees directly on road edge followed immediately by drainage ditches, vulnerable road users are prevented from using shoulders and made to use the roadway. With no legal definition of the road safety zone in Polish regulations, attempts to remove roadside trees lead to major conflicts with environmental stakeholders. This is why a compromise should be sought between the safety of road users and protection of the natural environment and the aesthetics of the road experience. Rather than just cut the trees, other road safety measures should be used where possible to treat the hazardous spots by securing trees and obstacles and through speed management. Accidents that are directly related to the road environment fall into the following categories: hitting a tree, hitting a barrier, hitting a utility pole or sign, vehicle rollover on the shoulder, vehicle rollover on slopes or in ditch. The main consequence of a roadside hazard is not the likelihood of an accident itself but of its severity. Poland's roadside accident severity is primarily the result of poor design or operation of road infrastructure. This comes as a consequence of a lack of regulations or poorly defined regulations and failure to comply with road safety standards. The new analytical model was designed as a combination of the different factors and one that will serve as a comprehensive model. It was assumed that it will describe the effect of the roadside on the number of accidents and their consequences. The design of the model was based on recommendations from analysing other models. The assumptions were the following: the model will be used to calculate risk factors and accident severity, the indicators will depend on number of vehicle kilometres travelled or traffic volumes, analyses will be based on accident data: striking a tree, hitting a barrier, hitting a utility pole or sign. Additional data will include roadside information and casualty density measures will be used - killed and injured.
Effective density of airborne wear particles from car brake materials
- Oleksii Nosko
- Ulf Olofsson
2017 Full text JOURNAL OF AEROSOL SCIENCE
People living in urban environments are subject to high health risks due to various anthropogenic sources of airborne particulate matter, including wear of transport vehicle brakes. Studies of airborne particles often require an estimate of the effective particle density, a property that allows correct matching of mass and size characteristics measured by different aerosol instruments. In this study we investigated the effective density of airborne wear particles emitted from car brake materials. The particles were generated by a pin-on-disc machine located in a sealed chamber. Two methods were used to determine the effective density. The first method is based on measurements of PM10 and particle size distribution. The second method involves measurements and subsequent fitting of the mobility size distribution and aerodynamic size distribution. Results from the two methods showed good agreement. It was found that the effective density is 0.75±0.2 g/cm3. The particle emission, size distribution and effective density are sensitive to temperature variations. An intensive emission of ultrafine particles is initiated at the disc temperature of 185±16 °C. The effective density decreases with the temperature in the interval 110–360 °C. There is a large difference between the effective density and the density of the particle material, which suggests that the particles are porous.
Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study
- Magdalena Gajewska
- Krzysztof Jóźwiakowski
- Katarzyna Skrzypiec
2017 Full text
In recent years, an increase in interest in hybrid constructed wetland systems (HCWs) has been observed. The aim of the paper is to compare different HCW configurations in terms of mass removal rates and efficiency of pollutants removal. Analysed data have been collected at multistage constructed wetlands in Poland, which are composed by at least two beds: horizontal subsurface flow (SSHF) and vertical subsurface flow (SSVF). The evaluation was focused on hybrid constructed wetlands performance with HF+VF vs. VF+HF configuration, where influent wastewater of the same composition was treated. In analysed HCWs, the effective removal of organic matter from 75.2 to 91.6% COD was confirmed. Efficiency of total nitrogen removal varied from 47.3 to 91.7%. The most effective removal of TN (8.3 g m−2 d−1) occurred in the system with VF+VF+HF configuration.
Effects of La Content on the Densification, Microstructure, and Conductivity of Doped La10−x Ge6 O26±δ Electrolytes
- Sea-Fue Wang
- Yi-Xin Liu
- Yung-Fu Hsu
- Chun-Jui Li
- Piotr Jasiński
2017 International Journal of Applied Ceramic Technology
In this study, the influence of La content on the characteristics of Nb-, Mo-, and W-doped LaxGe6O26±δ electrolytes was investigated through sintering study, X-ray diffraction, scanning electron microscopy, and conductivity measurement. The densification of LaxGe5.5Nb0.5O26±δ and LaxGe5.5W0.5O26±δ was retarded as the x reached 9.75, while that of LaxGe5.5Mo0.5O26±δ improved with increasing La content. The average grain size slightly increased and weight loss due to evaporation of GeO2 significantly reduced with increasing La content, ranging from 1.39% to 0.26%. Among the systems studied, La9.33Ge5.5Nb0.5O26.245, La9.33Ge5.5Mo0.5O26.045, and La9.50Ge5.5W0.5O26.75 electrolytes revealed great potential for use in SOFC applications.
Effects of Xanthan Gum Biopolymer on the Permeability, Odometer, Unconfined Compressive and Triaxial Shear Behavior of a Sand
- A.f. Cabalar
- Mateusz Wiszniewski
- Zdzisław Skutnik
2017 Soil Mechanics and Foundation Engineering
Biopolymers, which are microbially induced polymers, can be used as an alternative material to improve engineering performance of soils. In this paper, a laboratory study of 0.075-1.0 mm size sand and biopolymer (i.e., xanthan gum) mixtures with various mix ratios (0%, 0.5%, 1.0%, and 1.5%) was performed. The materials, specimen preparation, and test methods are described, as are the results of a suite of permeability, odometer, unconfined compressive, and triaxial shear tests. The results suggests that specimen formation in the way used here could reduce permeability and increase compressibility, strength, and deformation characteristics in terms of stiffness.
Efficient Complex Root Tracing Algorithm for Propagation and Radiation Problems
- Piotr Kowalczyk
- Wojciech Marynowski
2017 Full text IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
An efficient complex root tracing algorithm for propagation and radiation problems is presented. The proposed approach is based on a discretization of Cauchy’s Argument Principle and its generalization to the C × R space. Moreover, an engagement of the tracing process with a global root finding algorithm recently presented in the literature is performed. In order to confirm a validity and efficiency of the proposed technique, a few different types of structures have been analyzed.
Efficient three-dimensional fluorescence measurements for characterization of binding properties in some plants
- Yang-Gyu Ku
- Jong-Hyang Bae
- Alma Leticia Martinez-Ayala
- Suchada Vearasilp
- Jacek Namieśnik
- Pawel Pasko
- Elena Katrich
- Shela Gorinstein
2017 SENSORS AND ACTUATORS B-CHEMICAL
The main aim of this research was to characterize some plants and to determine their similarities and differences, using spectroscopic methods. The interactions of soluble polyphenols of different plants with human serum albumin (HSA) were investigated by 3D-fluorescence. The obtained fluorescence results allow to classify the investigated plants according to their binding properties. The HSA-binding capacities of these plants were the highest for asparagus and correlated with their antioxidant properties. To our knowledge this is the first report showing differences and similarities in these plants, using spectroscopic techniques. The fluorescence spectral methods, which were applied as a powerful tool showing the quenching properties of intrinsic fluorophores in protein molecules in the presence of some plant polyphenols, can contribute in pharmaceutical and food applications.
Efficient Usage of Dense GNSS Networks in Central Europe for the Visualization and Investigation of Ionospheric TEC Variations
- Grzegorz Nykiel
- Yevgen M. Zanimonskiy
- Yuri Yampolski
- Mariusz Figurski
2017 Full text SENSORS
The technique of the orthogonal projection of ionosphere electronic content variations for mapping total electron content (TEC) allows us to visualize ionospheric irregularities. For the reconstruction of global ionospheric characteristics, numerous global navigation satellite system (GNSS) receivers located in different regions of the Earth are used as sensors. We used dense GNSS networks in central Europe to detect and investigate a special type of plasma inhomogeneities, called travelling ionospheric disturbances (TID). Such use of GNSS sensors allows us to reconstruct the main TID parameters, such as spatial dimensions, velocities, and directions of their movement. The paper gives examples of the restoration of dynamic characteristics of ionospheric irregularities for quiet and disturbed geophysical conditions. Special attention is paid to the dynamics of ionospheric disturbances stimulated by the magnetic storms of two St. Patrick’s Days (17 March 2013 and 2015). Additional opportunities for the remote sensing of the ionosphere with the use of dense regional networks of GNSS receiving sensors have been noted too.
Efficient Use of Capital: Paradox of Real Estate and Industry in Turkey
- Ali Hepsen
- Mehmet Asici
- Olgun Aydin
2017 Full text International Journal of Economics and Finance Studies
In recent years, one of the hottest debates on Turkish economy is the conflict on resource allocation between real estate and industry sectors. The debate was so intense that ex-minister of Economy Mr. Ali Babacan declared his opinions. Mr. Babacan’s statements about the creation of fixed capital by the private sector is not promising, and private sector fixed capital expenditures are not in the desired level. This situation is due to the limited economic growth and future economic growth. In this study, we have investigated whether Mr. Babacan’s statement is right or not. We have discussed the reliability of the measurement of real estate output as Gruneberg and Folwell did in 2013 and Ruddock did in 2002. That could be concluded that we agree with ex-minister of Economy Mr. Babacan’s comments regarding to imbalances among sectors are threatening Turkish economy’s stability. The imbalances are favoring residential real estate investments and consequently the country is exposed to currency risk.
Ekonomiczne efekty organizacji wielkoformatowych wydarzeń sportowych
- Krystian Zawadzki
2017
Przedmiotem rozważań w niniejszej monografii są efekty wywołane organizacją wielkoformatowych wydarzeń sportowych. Pretekstem do podjęcia tej tematyki jest duże zainteresowanie organizacją tych wydarzeń tłumaczone korzystnym oddziaływaniem na gospodarkę gospodarza. Przegląd literatury przedmiotu wskazuje jednak na rozbieżności w tym zakresie pomiędzy oficjalnymi opracowaniami publikowanymi na zlecenie organizatorów oraz niezależnymi, akademickimi opracowaniami. Podczas gdy te pierwsze wskazują na jednoznacznie korzystne efekty organizacji wielkoformatowych wydarzeń sportowych, te drugie charakteryzują się w tym względzie daleko idącą wstrzemięźliwością. Rozważania zawarte w monografii miały w założeniu autora służyć realizacji kilku celów:  określeniu atrybutów i zdefiniowania pojęcia wydarzenia wielkoformatowego.  przeanalizowaniu wielu różnych wielkoformatowych wydarzeń sportowych oddziałujących ex post na wiele ekonomicznych obszarów, zarówno na poziomie państwa, jak i regionu. Dotychczas światowe publikacje odwoływały się do jednej imprezy lub jednej kategorii imprez wielkoformatowych w wielu obszarach oddziaływania lub do wielu wydarzeń w jednym obszarze oddziaływania.  przeprowadzeniu na przykładzie Euro 2012 wyceny trudno mierzalnych efektów wielkoformatowego wydarzenia sportowego, pozwalającego na oszacowanie trudno mierzalnych korzyści netto. Do tej pory w literaturze przedmiotu podejmowano wyłącznie próby szacunków trudno mierzalnych korzyści. W niniejszym opracowaniu zaproponowano koncepcję umożliwiającą wycenę zarówno trudno mierzalnych korzyści, jak i trudno mierzalnych kosztów.  analizie determinant wyceny trudno mierzalnych korzyści i kosztów na przykładzie Euro 2012 w Polsce. Dotychczas przy pomocy metody wyceny warunkowej realizowane były badania determinant gotowości do zapłaty wyłącznie wśród trudno mierzalnych korzyści wielkoformatowych wydarzeń sportowych organizowanych w krajach wysoko rozwiniętych. Choć w zamyśle niniejsza monografia ma charakter naukowy, może okazać się przydatna dla przedstawicieli jednostek samorządowych myślących teraz lub w przyszłości o organizacji takich imprez, dydaktyków podejmujących problematykę organizacji dużych wydarzeń, czy zarządzania obiektami sportowymi, studentów kierunków ekonomicznych oraz kibiców i wszystkich innych, którym bliska jest tematyka szeroko pojętego sportu.
Ekspertyza na temat określenia przyczyn powstania spękań poprzecznych nawierzchni
- Krzysztof Wilde
- Bohdan Dołżycki
- Piotr Jaskuła
- Mikołaj Miśkiewicz
- Marcin Stienss
- Jacek Lachowicz
- Cezary Szydłowski
- Paweł Tysiąc
- Jacek Chróścielewski
- Magdalena Rucka
2017
Celem opracowania jest określenie prawdopodobnych przyczyn powstania spękań poprzecznych przy dylatacjach obiektów inżynierskich położonych w ciągu odcinków drogi ekspresowej S8 oraz drogi krajowej nr 63, których przebudowa była objęta kontraktem „Przebudowa do parametrów drogi ekspresowej S8, odcinek Wyszków-Białystok, odc. Jeżewo-Choroszcz-Białystok, obw. m. Zambrów i m. Wiśniewo.” Zakres ekspertyzy obejmował analizę dokumentacji projektowej, kontraktowej oraz utrzymaniowej, ocenę stanu nawierzchni na podstawie wykonanych odwiertów i odkrywek, badań georadarowych, skaningu laserowego oraz wskazanie prawdopodobnych przyczyn i mechanizmów powstania spękań poprzecznych nawierzchni przy dylatacjach obiektów mostowych.
Ekspertyza nr: 42/017/II/2017 - na temat zmian własności materiałowych na skutek pożaru
- Jakub Kowalski
- Janusz Kozak
2017
Ekspertyzie podlegały elementy nośne konstrukcji spalonej częściowo hali, pochodzące z trzech rejonów: rejonu bezpośrednio objętego pożarem, rejonu na który miała wpływ wysoka, nieokreślona temperatura i rejonu w którym nie było wpływu pożaru (próbki odniesienia). Określono własności materiałowe i możliwości dalszej eksploatacji konstrukcji z rejonu drugiego
Ekspertyza przyczyn uszkodzenia krzywek mocowania baterii wannowej
- Krzysztof Krzysztofowicz
- Grzegorz Gajowiec
2017
Wykonano badania celem ustalenia przyczyn uszkodzenia krzywek do mocowania baterii wykonanych z mosiądzu. Jako przyczynę wskazano korozję międzykrystaliczną.
Ekspertyza przyczyn uszkodzenia zaworu kulowego 1/2"
- Krzysztof Krzysztofowicz
- Grzegorz Gajowiec
2017
Wykonano badania przyczyn uszkodzenia zaworu kulowego wykonanego z mosiądzu. Jako przyczynę wskazano korozjęe naprężeniową.
Ekspertyza szyn 60E1 na stacji Grodzisk Mazowiecki
- Zbigniew Kędra
- Sławomir Grulkowski
2017
Ekspertyza szyn kolejowych 60E1