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DIAGNOSTYKA KABLI ŚREDNIEGO NAPIĘCIA W ENERGA-OPERATOR SA
PublicationW referacie przedstawiono wyniki pomiarów diagnostycznych kabli średniego napięcia (SN) o izolacji polietylenowej, o różnym czasie eksploatacji do lat 15. Analizowano poziom wyładowań niezupełnych (wnz) oraz współczynnik strat dielektrycznych tg mierzony przy oddziaływaniu napięcia o częstotliwości 0,1 Hz (VLF). Znaczne zróżnicowanie otrzymanych wyników pomiarów wskazuje na skuteczność wykrywania zachodzących procesów starzeniowych...
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Application of linear discriminant analysis to the study of dew chemistry on the basis of samples collected in Poland (2004-2005)
PublicationTechnikę analizy dyskryminacyjnej wykorzystano do klasyfikacji próbek rosy (zebranych w okresie sierpień 2004 - październik 2005 na terenie Gdyni, Gdańska, Mławy, Sopotu, Krakowa, w których oznaczono stężenia wybranych związków nieorganicznych i organicznych) na naturalnie wyłaniające się grupy oraz by zidentyfikować parametry fizykochemiczne odpowiedzialne za podobieństwa i różnice pomiędzy poszczególnymi miejscami pobierania...
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Ocena stanu technicznego obiektów budowlanych Pomorskiej Kolei Metropolitarnej po ekstremalnym opadzie atmosferycznym w dniach 14 - 15 lipca 2016 r
PublicationOpinię wykonano w związku z powołaniem przez Marszałka Województwa Pomorskiego, Zespołu Ekspertów ds. analizy inwestycji Pomorskiej Kolei Metropolitarnej w kontekście stanu infrastruktury PKM po deszczu nawalnym w dniu 14/15.07.2016 r. Celem przeprowadzonych prac studialnych (uzupełnionych o wizje lokalne) była analiza udostępnionych dokumentacji pod kątem poprawności rozwiązań technicznych. Zakres prac: • Ocena zgodności dokumentacji...
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Ariel Dzwonkowski dr inż.
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Rafał Janowicz dr hab. inż. arch.
PeopleRafał Janowicz since 2011, he is an associate professor at the Faculty of Architecture of the Gdańsk University of Technology, at the Department of Technical Fundamentals of Architectural Design. He has graduated from the Faculty of Architecture of the Gdańsk University of Technology in 2001, with the major in Architecture and Urban Design, and two years later from the Faculty of Management and Economics with the major in Management...
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New distributional data on bryophytes of Poland and Slovakia, 3
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Mechanika Konstrukcji Okrętu, I stop., Sn, [W], [BR], 2022/2023, (O:098210n)
e-Learning CoursesKierunek BOiJ, tematy kursu: Klasyfikacja elementów konstrukcji; Zasada pracy wirtualnej i jej zastosowania. Metoda Sił; Metoda Przemieszczeń w ujęciu klasycznym i macierzowym; Podstawy MES cz. 1 (układy prętowe); Ścinanie i skręcanie prętów cienkościennych (środek skręcania); Elementy teorii tarcz i płyt; Powłoki obrotowo-symetryczne w stanie błonowym; Zagadnienia stateczności; Podstawy MES cz. 2 (tarcze i płyty); Zagadnienia...
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Izabela Burda dr inż. arch.
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Jerzy Buriak dr inż.
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Fast collaborative graph exploration
PublicationWe study the following scenario of online graph exploration. A team of k agents is initially located at a distinguished vertex r of an undirected graph. At every time step, each agent can traverse an edge of the graph. All vertices have unique identifiers, and upon entering a vertex, an agent obtains the list of identifiers of all its neighbors. We ask how many time steps are required to complete exploration, i.e., to make sure...
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Strefy ograniczonego ruchu jako recepta na problemy śródmiejskich ulic handlowych współczesnych miast?: Śródmieście Gdyni – ulica Starowiejska
PublicationUlice handlowe pełnią istotne funkcje w śródmieściach miast: transportowe, wizerunkowe, są przestrzeniami publicznymi. Współczesne strategie rozwoju miast podkreślają kluczową rolę śródmieść w procesie ich odradzania. Uwzględnienie zwiększonego udziału pieszych i rowerzystów w ruchu może stać się impulsem dla rewitalizacji śródmiejskich ulic. Przy wzrastającej liczbie centrów i galerii handlowych wymagają one szczególnej uwagi,...
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Retention behaviour of some high-intensity sweeteners on different SPE sorbents
PublicationThe objective of this paper is to provide information about application of solid phase extraction (SPE) for isolation of nine high-intensity sweeteners (acesulfame-K, alitame, aspartame, cyclamate, dulcin, neotame, saccharin, sucralose and neohesperidin dihydrochalcone) from aqueous solutions. The influence of several types of LC-MS compatible buffers (different pH values and compositions) on their recovery has been studied and...
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Characterization of exceptionally thermostable single-stranded DNA-binding proteins from Thermotoga maritima and Thermotoga neapolitana
PublicationBACKGROUND: In recent years, there has been an increasing interest in SSBs because they find numerous applications in diverse molecular biology and analytical methods.RESULTS: We report the characterization of single-stranded DNA binding proteins (SSBs) from the thermophilic bacteria Thermotoga maritima (TmaSSB) and Thermotoga neapolitana (TneSSB). They are the smallest known bacterial SSB proteins, consisting of 141 and 142 amino...
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Analizy wyznaczenia dedykowanych pasów autobusowych w Gdyni
PublicationRosnący udział podróży transportem samochodowym i związany z tym wzrost natężenia ruchu drogowego, negatywnie wpływa na jakość funkcjonowania transportu zbiorowego, a w szczególności tego, który jest z ruchem drogowym bezpośrednio związany – transportu autobusowego. Zwiększające się zatłoczenie ulic wywołuje zaburzenia funkcjonowania systemu transportu autobusowego, przede wszystkim w postaci opóźnień pojazdów lub też wydłużeniem...
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Kościół św. Andrzeja w Barczewie. Historia przekształceń zespołu franciszkańskiego
PublicationKościół św. Andrzeja w Barczewie jest jedyną zachowaną świątynią klasztorną na Warmii, której początki sięgają średniowiecza. Porzucone przez franciszkanów w połowie XVI w. założenie klasztorne zostało odbudowane staraniem kardynała Andrzeja Batorego – bratanka króla Stefana i przekazane bernardynom. Batory zaczął wznosić także unikalną centralną kaplicę grobową, w której umieścił podwójny cenotaf dłuta Willema van den Blocke....
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Capacity Transforming challenges into opportunities
PublicationThe Urban Initiative Laboratory (UIL) aims to upgrade the smart city concept in Gdańsk by introducing the Food-Water-Energy (FWE) nexus to the city. It was agreed in the CRUNCH international consortium that projects on different scales would be implemented in the individual countries to test the Integrated Decision Supportive system platform, which would, in principle, concern urban scale. The regular urban scale was to be researched...
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Locust bean gum as green and water-soluble binder for LiFePO4 and Li4Ti5O12 electrodes
PublicationLocust Bean Gum (LBG, carob bean gum) was investigated as an environmentally friendly, natural, and water-soluble binder for cathode (LFP) and anode (LTO) in lithium-ion batteries (Li-ion). For the frst time, we show LBG as an electrode binder and compare to those of the most popular aqueous (CMC) and conventional (PVDF) binders. The electrodes were characterized using TGA/DSC, the galvanostatic charge–discharge cycle test, cyclic...
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Topological-numerical analysis of a two-dimensional discrete neuron model
PublicationWe conduct computer-assisted analysis of a two-dimensional model of a neuron introduced by Chialvo in 1995 [Chaos, Solitons Fractals 5, 461–479]. We apply the method of rigorous analysis of global dynamics based on a set-oriented topological approach, introduced by Arai et al. in 2009 [SIAM J. Appl. Dyn. Syst. 8, 757–789] and improved and expanded afterward. Additionally, we introduce a new algorithm to analyze the return times...
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A Series of Novel 3D Coordination Polymers Based on the Quinoline-2,4-dicarboxylate Building Block and Lanthanide(III) Ions—Temperature Dependence Investigations
PublicationA series of novel 3D coordination polymers [Ln2(Qdca)3(H2O)x]yH2O (x = 3 or 4, y = 0–4) assembled from selected lanthanide ions (Ln(III) = Nd, Eu, Tb, and Er) and a non-explored quinoline- 2,4-dicarboxylate building block (Qdca2 = C11H5NO4 2) were prepared under hydrothermal conditions at temperatures of 100, 120, and 150 C. Generally, an increase in synthesis temperature resulted in structural transformations and the formation...
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Taurine as a water structure breaker and protein stabilizer
PublicationThe enhancing effect on the water structure has been confirmed for most of the osmolytes exhibiting both stabilizing and destabilizing properties in regard to proteins. The presented work concerns osmolytes, which should be classified as “structure breaking” solutes: taurine and N,N,N-trimethyltaurine (TMT). Here, we combine FTIR spectroscopy, DSC calorimetry and DFT calculations to gain an insight into the interactions between...
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Calibration of acoustic vector sensor based on MEMS microphones for DOA estimation
PublicationA procedure of calibration of a custom 3D acoustic vector sensor (AVS) for the purpose of direction of arrival (DoA) estimation, is presented and validated in the paper. AVS devices working on a p-p principle may be constructed from standard pressure sensors and a signal processing system. However, in order to ensure accurate DoA estimation, each sensor needs to be calibrated. The proposed algorithm divides the calibration process...
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IP Core of Coprocessor for Multiple-Precision-Arithmetic Computations
PublicationIn this paper, we present an IP core of coprocessor supporting computations requiring integer multiple-precision arithmetic (MPA). Whilst standard 32/64-bit arithmetic is sufficient to solve many computing problems, there are still applications that require higher numerical precision. Hence, the purpose of the developed coprocessor is to support and offload central processing unit (CPU) in such computations. The developed digital...
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Polyurethane porous scaffolds (PPS) for soft tissue regenerative medicine applications
PublicationTissue engineering requires suitable polymeric scaffolds, which act as a physical support for regenerated tissue. A promising candidate might be polyurethane (PUR) scaffold, due to the ease of the PUR properties design, which can be adjusted directly to the intended purpose. In this study, we report a successful fabrication of porous polyurethane scaffolds (PPS) using solvent casting/particulate leaching technique combined with...
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Heat treatment effect on Eu3+ doped TeO2-BaO-Bi2O3 glass systems with Ag nanoparticles.
PublicationGlass systems of 73TeO2-4BaO-3Bi2O3-2Eu2O3-xAg ( in molar ratio where x= 0, 1, 2, 3) compositions have been successfully synthesized. Silver nanoparticles were obtained with the employment of heat treatment (HT) procedure executed at 350 °C. Glass transition temperatures of different compositions have been determined through DSC measurements. XRD measurement results presented characteristic amorphous halo indicating lack of long...
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FPGA implementation of the multiplication operation in multiple-precision arithmetic
PublicationAlthough standard 32/64-bit arithmetic is sufficient to solve most of the scientific-computing problems, there are still problems that require higher numerical precision. Multiple-precision arithmetic (MPA) libraries are software tools for emulation of computations in a user-defined precision. However, availability of a reconfigurable cards based on field-programmable gate arrays (FPGAs) in computing systems allows one to implement...
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Synthesis, structural characterization and reactivity of new trisubstituted N1-acylamidrazones: solid state and solution studies
PublicationA series of new linear trisubstituted N1-acylamidrazones have been investigated using a variety of analytical techniques and theoretical calculations to check the influence of the type of N1-acyl substituent on the resonance forms and conformational behavior in the solid state and in solution. The 1D- and 2D-NMR experiments, supported by computational studies, revealed that in solution all amidrazones exhibit conformational syn/anti...
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The Effect of Surface Treatment with Isocyanate and Aromatic Carbodiimide of Thermally Expanded Vermiculite Used as a Functional Filler for Polylactide-Based Composites
PublicationIn this work, thermally expanded vermiculite (TE-VMT) was surface modified and used as a filler for composites with a polylactide (PLA) matrix. Modification of vermiculite was realized by simultaneous ball milling with the presence of two PLA chain extenders, aromatic carbodiimide (KI), and 4,4’-methylenebis(phenyl isocyanate) (MDI). In addition to analyzing the particle size of the filler subjected to processing, the efficiency...
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Bulk-Surface Modification of Nanoparticles for Developing Highly-Crosslinked Polymer Nanocomposites
PublicationSurface modification of nanoparticles with functional molecules has become a routine method to compensate for diffusion-controlled crosslinking of thermoset polymer composites at late stages of crosslinking, while bulk modification has not carefully been discussed. In this work, a highly-crosslinked model polymer nanocomposite based on epoxy and surface-bulk functionalized magnetic nanoparticles (MNPs) was developed. MNPs were...
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Systemy teleinnformatyczne i telematyka w transporcie 202/2023 zimowy
e-Learning CoursesPodstawowe definicje. Rodzaje systemów informacyjnych i ich opis. Ilość informacji, kodowanie i kompresja. Właściwości systemów teleinformatycznych. Sieci informatyczne: nadajniki, odbiorniki, media transmisyjne. Protokoły transmisji danych. Przewodowe sieci abonenckie. Sieci lokalne i rozległe LAN, WAN. Zasady łączenia sieci. Rozmieszczenie zasobów informacji i ich przepływ. Środki i standardy przekazywania informacji. Systemy...
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Hydrogen Production Mechanism in Low-Temperature Methanol Decomposition Catalyzed by Ni3Sn4 Intermetallic Compound: A Combined Operando and Density Functional Theory Investigation
PublicationHydrogen production from methanol decomposition to syngas (H2 + CO) is a promising alternative route for clean energy transition. One major challenge is related to the quest for stable, cost-effective, and selective catalysts operating below 400 °C. We illustrate an investigation of the surface reactivity of a Ni3Sn4 catalyst working at 250 °C, by combining density functional theory, operando X-ray absorption spectroscopy, and high-resolution...
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Thermodynamic Studies of Interactions between Sertraline Hydrochloride and Randomly Methylated β-Cyclodextrin Molecules Supported by Circular Dichroism Spectroscopy and Molecular Docking Results
PublicationThe interaction between sertraline hydrochloride (SRT) and randomly methylated β-cyclodextrin (RM β CD) molecules have been investigated at 298.15 K under atmospheric pressure. The method used—Isothermal Titration Calorimetry (ITC) enabled to determine values of the thermodynamic functions like the enthalpy (DH), the entropy (DS) and the Gibbs free energy (DG) of binding for the examined system. Moreover, the stoichiometry coefficient...
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Projekt UPGRID
PublicationMiędzynarodowy projekt UPGRID realizowany jest w ramach programu Horyzont 2020 (H2020). Program ten to największy jak dotąd program Unii Europejskiej (UE) w zakresie badań naukowych i innowacji. W projekcie UPGRID uczestniczy 17 partnerów z 9 krajów EU. Głównym celem projektu UPGRID jest rozwój funkcjonalności, które służą integracji sieci nn oraz SN ze stroną konsumencką. W ramach projektu wybrane technologie Inteligentnych Sieci...
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π-Conjugated Donor-acceptor Polyelectrolytes: Toward Artificial Photosynthesis
PublicationGreat advances have been made in the development of conjugated polyelectrolytes (CPEs), which provide tunable properties including water solubility and processability, main-chain exciton and charge transport, variable energy light absorption and fluorescence, non-covalent interactions, and formation of tertiary structures via self-assembly.[1] These characteristics allow CPEs to be considered for use in various optoelectronic applications,...
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Galerkin Finite Element Process for Entropy Production and Thermal Evaluation of Third-Grade Fluid Flow: A Thermal Case Study
Publication: A fluid’s moving class improves its heat transmission capability, as well as its rigidity, owing to multivariate molecule suspension. In this way, nanofluids are superior to common fluids. In this study, we evaluated the features of ease and heat transfer. Furthermore, we investigated permeable media, heat source, variable heat conductivity, and warm irradiation results. A mathematical technique known as the Galerkin finite element...
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Which transport policies increase physical activity of the whole of society? A systematic review
PublicationPurpose: There is strong evidence of the links between car-dependence and the physical inactivity pandemic. Physical inactivity accounts for 6–10% of major non-communicable diseases. Research consistently shows that unlike passive transport, active transport is associated with higher total daily physical activity (PA). While there are public policies that support PA in transport and, as a result, overall PA levels, the specific...
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Interventions reducing car usage: Systematic review and meta-analysis
PublicationThis systematic literature review aimed to investigate the extent to which transport-related interventions induced a reduction in car use. Both qualitative synthesis and meta-analysis were employed. The synthesis included 31 original studies, while the meta-analysis included 21. Of the qualitatively synthesised studies, 74 % demonstrated that interventions were effective in reducing car use. The pooled estimates of the effects...
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Magdalena Brzozowska-Woś dr hab. inż.
PeopleMagdalena Brzozowska-Woś is a graduate of the Faculty of Management and Economics of the Gdańsk University of Technology (specialization: management systems). She is also a graduate of Postgraduate Studies in Advertising (Faculty of Management and Economics, GUT) and Postgraduate Studies in Public Relations (SWPS University of Humanities and Social Sciences). In the years 2000-2003, she cooperated with Panorama Internet sp. z o....
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Mohammad Hossein Ghaemi dr inż.
PeopleMohammad Hossein Ghaemi Mohammad Hossein Ghaemi (1967), is an Assistant Professor at the Faculty of Mechanical Engineering and Ship Technology - WIMiO (till 2020: Faculty of Ocean Engineering and Ship Technology), Department of Automatics and Marine Energy Engineering. He studied first at Tehran University, where was graduated in the field of Mechanical Engineering (Solid Mechanics). Then he received his MSc degree in the area...
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The structure of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides measured with X-ray diffraction method
Open Research DataThe structure of strontium–borate glasses and glass-ceramics containing bismuth and vanadium oxides was measured by XRD.
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Projektowanie Konstrukcji Okrętu, P, BOiJ, sem7 DS - studia niestacjonarne, zimowy 21/22, (PG_00046546)
e-Learning CoursesWykonanie metodą MES w oprogramowaniu MSC Patran/Nastran 2021.1 Student Edition analizy obciążenia fragmentu sekcji dna podwójnego i pokładu promu pasażersko-samochodowego.
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Transformatory z regulacją przekładni pod obciążeniem w systemie elektroenergetycznym
PublicationZmiany zachodzące w systemie elektroenergetycznym, związane między innymi ze stałym wzrostem zapotrzebowania na moc, przyłączaniem źródeł odnawialnych czy rozwojem elektromobilności, przy jednoczesnym wzroście wymagań dotyczących jakości energii elektrycznej, zmuszają operatorów sieci elektroenergetycznych do podejmowania działań zmierzających do sprostania nowym wymaganiom. Jednym z kierunków tych działań jest wykorzystanie w...
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Ochrona własności intelektualnej [moduł III obowiązkowy, grupy A i B]
e-Learning CoursesProwadząca: dr Justyna Pawłowska, Polski i Europejski rzecznik patentowy pełnomocnik przed Urzędem UE ds. Własności Intelektualnej Zespół Rzeczników Patentowych PG, tel: 58 348 6633 Terminy realizacji: Zajęcia odbędą się 03 lutego -09:30 -14:30 Celem warsztatów jest przybliżenie uczestnikom głównej kategorii praw własności intelektualnej: patentów, ochrony wzorów przemysłowych i znaków towarowych. Zaprezentowane zostaną...
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Pompownie dużej mocy z falownikiem wędrującym średniego napięcia
PublicationArtykuł zawiera rys rozwoju napędów przekształtnikowych w stacjach pomp, w szczególności regulacji wydatku kilku pomp, po kolei, przez jeden przemiennik częstotliwości. Omówiono podstawy teoretyczne zjawiska pola niestłumionego i napięcia resztkowego silników, które utrudniają szybkie przełączania silnika pompy pomiędzy zasilaniem regulowanym przez falownik a zasilaniem z sieci. Przedstawiono zasady transferu (przełączania) synchronicznego...
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Recovering Evaluation of Narrow-Kerf Teeth of Mini Sash Gang Saws
PublicationSash gang saws with narrow-kerf saw blades are used in the production of glued laminate flooring elements in plants where dry technology is applied. This means that boards or friezes are sawn into top layer lamellae in dry conditions (moisture content of about 10–12%) from expensive wood species, often exotic. The object of this research was stellite-tipped teeth of narrow kerf saw blades sharpened under industrial conditions....
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Original footbridge in Mikolajki, Poland
PublicationIn summer 2016, a new footbridge in the town of Mikołajki (Poland) was built, over a stream connecting two adjacent lakes – Talty and Mikołajki. Its modern construction, based on the shape of a DN ice-boat, makes it inique in Poland, and probably in the world as well. This novel and dynamic shape became a significant landmark associated not only with Mikołajki, but also with the whole region of Mazury, as well as with sailing...
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Electron scattering from tin tetrachloride (SnCl4) molecules
PublicationAbsolute grand-total cross section (TCS) for electron scattering from a tin tetrachloride, SnCl4, molecule was measured at electron-impact energies ranging from 0.6 to 300 eV, in the linear electron-transmission experiment. The measured TCS energy dependence shows two very pronounced enhancements peaking near 1.2 eV and around 9.5 eV, separated with a deep minimum centered close to 3 eV. The low energy structure is attributed to...
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Video traffic data - Interchange Podwarpie (S1-86) - weaving, Poland
Open Research DataThe data includes video traffic data registered with 4 video cameras at weaving area (weaving section type A) of the Podwarpie interchange within S1 expressway in Poland (interchange of expressway S1 and national road 86), located in the Silesian Agglomeration. The data covers the one day: 23.05.2017 (road 86).
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Video traffic data - Interchanges Grota Roweckiego (S86 - Grota Roweckiego)
Open Research DataThe data includes video traffic data registered with 2 video cameras at entry and exit lanes of the Grota Roweckiego interchange within S86 expressway in Poland (interchange of expressway S86 and Grota Roweckiego street), located in the Silesia Agglomeration. The data covers the one days: 23.05.2017 (expressway S86). The video cameras installed on the...
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Wojciech Chrzanowski dr hab. inż.
PeopleWojciech Chrzanowski was born in 1952 in Toruń. He completed his studies in Chemical Technology in 1975, getting his MSc in Inorganic Technology (specialty: Anti-Corrosion Protection) At the Faculty of Chemistry, Gdańsk University of Technology (with distinction). Later this year he was employed in the Department of Analytical Chemistry of then Institute of Chemical Engineering and Measuring Techniques, initially as a technical...
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Knowledge‐Intensive Business Services (KIBS) and Their Role in the Knowledge‐Based Economy
PublicationThe importance of the knowledge‐intensive business services sector for the development of the economy is growing. In the 80s and 90s this sector became the fastest growing sector in the OECD countries (OECD, 2001). Many publications stress its close relationship to the levels of innovation and performance of the whole economy (e.g. Hipp, 1999; Tomlinson, 1999; Aslesen and Isaksen, 2007). It is an increasingly common belief that...