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Sympozjum "Przeprawa mostowa przez Wisłę koło Kwidzyna"
PublicationW artykule przedstawiono historię projektowania i budowy mostu przez Wisłę pod Kwidzynem w nawiązaniu do sympozjum, które odbyło się w Gdańsku w dniu 16.10.2014
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Ocena rzeczywistej wytrzymałości betonu na bazie monitoringu procesu dojrzewania i symulacji numerycznych
PublicationGłównym celem rozprawy jest opracowanie procedur badawczych i algorytmów numerycznych do wyznaczania rzeczywistej wytrzymałości betonu w konstrukcji wraz z ich implementacją w procesie budowalnym mostu typu extradosed. Zakres pracy obejmuje rozpoznanie metody dojrzałości, badania laboratoryjne betonów i zapraw, badania betonu zastosowanego do budowy przęsła mostu oraz obliczenia numeryczne rozkładu temperatury i wytrzymałości betonu...
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End of the hydrocarbon fuels' age?
PublicationHydrocarbon is still one of the most important natural treasures which has an enormous range of implementations in different sectors of the industry.
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Katedra Systemów Decyzyjnych
PublicationKatedra Systemów Decyzyjnych została utworzona jako dydaktyczno-naukowa jednostka organizacyjna Wydziału Elektroniki Telekomunikacji i Informatyki (ETI) w roku 2006 przez prof. dra hab. inż. Zdzisława Kowalczuka. Kadra, pochodząca głównie z Katedry Systemów Automatyki, swoimi dokonaniami wpisuje się w bogatą, ponad 40-letnią tradycję naszego Wydziału związaną z automatyką i teorią sterowania, której podwaliny tworzył profesor Jerzy...
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New technology for hearing stimulation employing the SPS-S method
PublicationIstotnym założeniem metody SPS-S jest możliwość stosowania treningu słuchowego w warunkach życia codziennego, a więc także poza gabinetami placówek terapeutycznych. Mobilne urządzenie - stymulator słuchu jest oparte na najnowszej technologii mikroelektronicznej, Oferuje on możliwość wykorzystywania wielu programów terapii, które przebiegają z zastosowaniem algorytmów cyfrowego przetwarzania dźwięku. Algorytmy te można podzielić...
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Testowanie serwisów i infrastruktury teleinformatycznej aktywnej sieci geodezyjnej ASG-EUPOS
PublicationWzorem państw europy zachodniej Polska przystąpiła do rozwoju własnej aktywnej sieci geodezyjnej. Projekt ASG-EUPOS, obejmujący uruchomienie 98 stacji referencyjnych globalnych systemów pozycyjnych GPS i Glonass zrealizowano w latach: 2007-2008, Na przełomie maja i czerwca 2008 roku Główny Urząd Geodezji i Kartografii wyłonił konsorcjum naukowe, ktrórego zadaniem było przeprowadzenie kompleksowych testów serwisów pozycyjnych sieci...
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Usuwanie arsenu z wody podziemnej w procesie zintegrowanym - koagulacja/mikrofiltracja
PublicationW pracy przedstawiono wyniki badań przeprowadzonych w skali ułamkowo technicznej nad zastosowaniem procesu koagulacji (współwytrącania) jonami żelaza, zintegrowanego z mikrofiltracją, do usuwania arsenu z wody podziemnej, zawierającej ok. 40 μg As/l, 0,70 mg Fe/l oraz 0,09 mg Mn/l. Jako koagulant zastosowano wodny roztwór siarczanu żelaza (III), w dawkach od 0,5 do 18 mg Fe/l. W badaniach wykorzystano rurowe membrany mikrofiltracyjne...
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Wykorzystanie technik zmiennoprądowych w analizie polaryzacji katodowej stali
PublicationRozprawę doktorską pod tytułem „Wykorzystanie technik zmiennoprądowych w analizie polaryzacji katodowej stali” podzielono na trzy zasadnicze części, które nawiązują do zróżnicowanego charakteru tematyki korozyjnej. W pierwszym rozdziale pracy podjęto problematykę kryteriów ochrony katodowej stosowanych w dokumentach technicznych. Przedstawiono podstawy teoretyczne ochrony katodowej oraz poddano analizie obecnie stosowane normy....
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HIGH TEMPERATURE HEAT PUMPS – PERSPECTIVE HEATING SYSTEMS?
PublicationIn the paper presented are authors own concepts of high temperature compressor heat pumps for the utilisation of medium and low temperature sources of heat. Working fluids for use in high temperature heat pumps are discussed, as well as the criteria for their selection. Analyses are presented for the production of in the upper steam source at 130 °C. One-stage systems and cascade systems were analyzed. An analysis of the coefficient...
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Tire/Road Noise On Poroelastic Road Surfaces - Results Of Laboratory Measurements
PublicationTire/road noise is the most important part of traffic noise for medium and high speed driving both in the case of passenger cars and trucks. The potential to make modification of tires that significantly reduce tire/road noise in nearly over, at least for conventional tires so the only promising action is to improve road pavements. One of the innovative solutions is poroelastic road pavement (PERS) that reduces airflow related...
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Network society: a concept of smart information management
PublicationAutomatic enhancement of Internet broadcasted news has been recently gaining increasing importance and interest. Existing applications and models of textual Event Detection in online media are based on the analysis of news distributed via RSS (Rich Site Summary called also Really Simple Syndication) channels or available at news websites. It assumes that each piece of news is equally available to the reader and, therefore, describes...
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Signature Partitioning Using Selected Population-Based Algorithms
PublicationDynamic signature is a biometric attribute which is commonly used for identity verification. Artificial intelligence methods, especially population-based algorithms (PBAs), can be very useful in the dynamic signature verification process. They are able to, among others, support selection of the most characteristic descriptors of the signature or perform signature partitioning. In this paper, we focus on creating the most characteristic...
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Reconfiguring Minimum Dominating Sets in Trees
PublicationWe provide tight bounds on the diameter of γ-graphs, which are reconfiguration graphs of the minimum dominating sets of a graph G. In particular, we prove that for any tree T of order n ≥ 3, the diameter of its γ-graph is at most n/2 in the single vertex replacement adjacency model, whereas in the slide adjacency model, it is at most 2(n − 1)/3. Our proof is constructive, leading to a simple linear-time algorithm for determining...
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Historical carpentry corner log joints—Numerical analysis within stochastic framework
PublicationThe paper presents the results of numerical analysis performed on historical, traditional carpentry corner logjoints of two basic topologies: the short-corner dovetail connection and the saddle notch connection. These types of carpentry joints are commonly used in currently preserved objects of wooden architecture. All connections have been modelled in pinewood, which has been defined in the Finite Element software MSC.Marc/Mentat...
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The New Test Procedure for Group-Type Composition of Base Oils of Lubricating Oils, Especially Emitted into the Environment
PublicationMineral base oil, a product of multistep fine refining of the relevant fractions from vacuum distillation of crude oil, is a main component of so-called mineral lubricating oils containing aliphatic and alicyclic substituted aromatic hydrocarbons, i.e., derivatives of benzene and biphenyl. Mineral lubricating oil is composed mostly of mineral base oil and a low amount of enriching additives, most often products of advanced organic...
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Recent progress in ultra-low formaldehyde emitting adhesive systems and formaldehyde scavengers in wood-based panels: a review
PublicationTraditional wood-based panels are produced with synthetic, formaldehyde-based adhesives, commonly made from fossil-derived constituents, such as urea, phenol, melamine, etc. Along with their numerous advantages, such as chemical versatility, high reactivity and excellent adhesive performance, these adhesives are characterized by certain problems, connected with the hazardous volatile organic compounds (VOCs), mostly free formaldehyde...
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Greencoin – educational information system for ecoinclusion and empowering urban adaptability.
PublicationThe SARS-CoV19 pandemic exposed a broad spectrum of challenges for modern cities, societies and the environment at large. The post-Covid transformation requires new social, ecological and educational solutions, adjusted to modern challenges, but also equipped with technological advances that allow for digital inclusion and sustainable urban development to benefit the local economy and society. Many information systems designed...
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Ontological Modeling for Contextual Data Describing Signals Obtained from Electrodermal Activity for Emotion Recognition and Analysis
PublicationMost of the research in the field of emotion recognition is based on datasets that contain data obtained during affective computing experiments. However, each dataset is described by different metadata, stored in various structures and formats. This research can be counted among those whose aim is to provide a structural and semantic pattern for affective computing datasets, which is an important step to solve the problem of data...
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Synthesis of the inosine 5'-monophosphate dehydrogenase (IMPDH) inhibitors
PublicationIn this review are summrized newly described IMPDH inhibitors. The article concerns both synthetic pathways and biological activities of the most promising compounds.
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Russian companies on foreign stock markets: alternative to domestic market?
PublicationFirst aim of this study is to present the main aspects of the Russian stock market, including obstacles for local companies and investors. Second aim is presentation of the Russian companies listed on foreign stock exchanges. In order to perform such analysis, descriptive statistics and information about qualitative features were used. Assessment of the Russian stock market’s development level covered 2003-2012 time period. According...
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Diagnostyka i wyjaśnienie aktualnego stanu 40-letniego wiaduktu kolejowego
PublicationPraca zawiera krótką ocenę stanu technicznego, opis przeprowadzonych badań nieniszczących in-situ oraz wykonanych modeli MES, służących do przeprowadzenia analiz na poziomie globalnym jak i lokalnym. Przedstawiono i omówiono wyniki analiz numerycznych, wykorzystanych do oceny stanu konstrukcji i mających na celu rozwiązanie sformułowanych problemów badawczych. Wykonane obliczenia na poziomie globalnym z uszczegółowieniem w obrębie...
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Projektowanie układów geometrycznych toru z zastosowaniem optymalizacji wielokryterialnej
PublicationW pracy przedstawiono metodę projektowania odcinków trasy kolejowej położonych w łuku, dostosowaną do techniki mobilnych pomiarów satelitarnych. Rozwiązanie problemu projektowego wykorzystuje zapis matematyczny i polega na wyznaczeniu uniwersalnych równań opisujących całość układu geometrycznego. Odbywa się to sekwencyjnie, obejmując kolejne fragmenty tegoż układu. Procedura projektowania ma charakter uniwersalny, gdyż w ogólnym...
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Uniwersalny program komputerowy do projektowania zmiany kierunku trasy
PublicationW pracy przedstawiono kolejny program komputerowy stanowiący implementację algorytmu obliczeniowego dotyczącego projektowania zmiany kierunku trasy kolejowej, dostosowanego do techniki ciągłych pomiarów satelitarnych. Program ten ma charakter uniwersalny, gdyż w ogólnym przypadku obejmuje wprowadzenie do układu geometrycznego dwóch łuków kołowych o różnym promieniu, czyli zastosowanie łuku koszowego. Może się to okazać szczególnie...
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Silica-templated three-dimensional graphene xerogels
PublicationMost porous carbons require the uniform pore size distribution therefore many approaches have been applied to template the carbon scaffolds and among them the use of silica particles is the easiest and the most effective. After discovering of graphene, the whole family of new carbon nanomaterials arose and one of the promising materials is graphene xerogel (GX) with a three-dimensional, highly porous structure. This monograph reviews...
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Transmission Quality Measurements in DAB+ Broadcast System
PublicationIn the age of digital media, delivering broadcast content to customers at an acceptable level of quality is one of the most challenging tasks. The most important factor is the efficient use of available resources, including bandwidth. An appropriate way of managing the digital multiplex is essential for both the economic and technical issues. In this paper we describe transmission quality measurements in the DAB+ broadcast system....
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A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis
Publicationhe deactivation of catalysts and their regeneration are two very important challenges that need to be addressed for many industrial processes. The most quoted reasons for the deterioration of dimethyl ether synthesis (DME) concern the sintering and the hydrothermal leaching of copper particles, their migration to acid sites, the partial formation of copper and zinc hydroxycarbonates, the formation of carbon deposits, and surface...
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Podpory nurtowe – wybrane zagadnienia teoretyczne
PublicationObliczenia hydrauliczne mostów i transportu rumowiska w rejonie podpór mostowych są przedmiotem wytycznych do projektowania. Metody tam proponowane są oparte na wzorach klasycznej hydrauliki. Przedstawiono inne podejście do obliczeń hydraulicznych, wykorzystujące dwuwymiarowy model przepływu wody. Pokazano numeryczną symulację hydrodynamiki w rejonie podpory mostu na Wiśle koło Kwidzyna. Na jej podstawie oszacowano intensywność...
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Electrodeposited Biocoatings, Their Properties and Fabrication Technologies: A Review
PublicationCoatings deposited under an electric field are applied for the surface modification of biomaterials. This review is aimed to characterize the state-of-art in this area with an emphasis on the advantages and disadvantages of used methods, process determinants, and properties of coatings. Over 170 articles, published mainly during the last ten years, were chosen, and reviewed as the most representative. The most recent developments...
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Brownian Motion in Optical Tweezers, a Comparison between MD Simulations and Experimental Data in the Ballistic Regime
PublicationThe four most popular water models in molecular dynamics were studied in large-scale simulations of Brownian motion of colloidal particles in optical tweezers and then compared with experimental measurements in the same time scale. We present the most direct comparison of colloidal polystyrene particle diffusion in molecular dynamics simulations and experimental data on the same time scales in the ballistic regime. The four most...
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Absorpcja energii kinetycznej statku przez urządzenie odbojowe nabrzeża
PublicationAnaliza wzoru Vasco Costy na energię kinetyczną cumującego statku zamienioną na energię potencjalną sprężystego odkształcenia urządzenia odbojowego zainstalowanego na nabrzeżu. Poprawna postać tego wzoru wraz z jego wyprowadzeniem.
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Uvelicenie nesusej sposobnosti gruntov osnovanij doroznyh nasypej.
PublicationPrzyśpieszenie konsolidacji słabych, nasyconych wodą gruntów i analiza stateczności nasypów drogowych. Zastosowanie nowoczesnej technologii wzmocnienia gruntów za pomocą mikrowybuchów na przykładzie nasypu na trasie dojazdowej mostu wantowego w Gdańsku.
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Projekt i analizy obliczeniowe kładki dla pieszych przez rz. Motławę w Gdańsku
PublicationArtykuł dotyczy projektu oraz analiz obliczeniowych wykonanych dla kładki dla pieszych przez rzekę Motława w Gdańsku. Na podstawie zwycięskiej koncepcji ogłoszonego w 2012 roku przez miasto Gdańsk konkursu zgłoszonej przez słoweńskie biuro PONTING zespół MOSTY GDAŃSK opracował projekt budowlany i wykonawczy konstrukcji. Wykonano zaawansowane statyczne i dynamiczne obliczenia MES. Ich celem było jak najlepsze odzwierciedlenie pracy...
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Ionization and fragmentation of furan molecules by electron collisions
PublicationCation mass spectra obtained by electron impact were measured to investigate the ionization and ionic fragmentation of furan, C4H4O, molecules in the gas phase. The most abundant cations, with comparable intensities in the mass spectra, were the parent, C4H4O+, cation (68 amu) and the C3H3+ fragment (39 amu). The appearance energies of most of the observed ionic fragments were determined and the possible fragmentation processes...
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Weldability of S500MC Steel in Underwater Conditions
PublicationWet welding with the use of covered electrodes is one of the methods of underwater welding. This method is the oldest, the most economic and the most versatile. The main difficulties during underwater wet welding are: high cooling rates of the joint, the presence of hydrogen in the arc area and formation of hard martensitic structure in the weld. These phenomena are often accompanied by porosity of welds and large number of spatters,...
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Innovative design of hybrid powered inland vessel
PublicationOne of the most demanding task for European countries is rational transportation system taking into account fuel efficient and ecological propulsion. The paper presents innovative design of hybrid powered inland vessel. The most important aspects regarding new design and technical solutions are being presented, including numerical and experimental research on hull form. Combined diesel-electric propulsion supported by solar panel...
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Activated persulfate and peroxymonosulfate based advanced oxidation processes (AOPs) for antibiotics degradation – A review
PublicationSulfate radical AOPs (SR-AOP) were successfully utilized in degradation of antibiotics in water and wastewater treatment. The review discusses details on SR-AOPs mechanisms and applications for antibiotics degradation. The progress in this field was discussed, highlighting the most promising developments and remaining challenges. The applicability of SR-AOPs was summarized revealing the most susceptible and persistent to oxidation...
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Effect of Nb and Al on in vitro dissolution behavior and structure of Na2O-MgO CaO-P2O5 glasses
PublicationIn vitro dissolution, structure, and thermal properties of the glass series Na2O-MgOsingle bondCaOsingle bondNb2O5 -Al2O3-P2O5 were studied. The dissolution behavior in phosphate-buffered saline (PBS) confirmed the potential bioactive properties of tested glasses. The dissolution process was found to depend on the Al, Nb, and Mg contents. Al, respectively, suppresses the Nb and accelerates the Mg release process from the glasses....
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H2O˙+ and OH+ reactivity versus furan: experimental low energy absolute cross sections for modeling radiation damage
PublicationRadiotherapy is one of the most widespread and efficient strategies to fight malignant tumors. Despite its broad application, the mechanisms of radiation-DNA interaction are still under investigation. Theoretical models to predict the effects of a particular delivered dose are still in their infancy due to the difficulty of simulating a real cell environment, as well as the inclusion of a large variety of secondary processes. This...
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Container Cargo Safety. New solutions and future trends
PublicationThe smoothness and flexibility of distribution of goods by containers are teh most important impulses for the development in these means of transport. But the second main reason for the growing containerization of freifht is cargo safety.
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Modal Analysis of a Steel Radial Gate Exposed to Different Water Levels
PublicationWith the increase in water retention needs and planned river regulation, it might be important to investigate the dynamic resistance of vulnerable elements of hydroelectric power plants, including steel water locks. The most frequent dynamic loads affecting hydroengineering structures in Poland include vibrations caused by heavy road and railway traffic, piling works and mining tremors. More destructive dynamic loads, including...
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Labellum and gynostemium micromorphology in Polystachya (Orchidaceae)
PublicationPolystachya is a large, pantropical orchid genus of 200 species, most of which occur as epiphytes in sub-saharan Africa. The three-lobed labellum of most Polystachya species possesses a fleshy callus and various types of trichomes and papillae. In this paper, we present the results of micromorphological studies on the labellum of 20 species, representing eight of the 13 sections in the genus, using scanning electron microscopy...
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High-quality academic teachers in business school. The case of The University of Gdańsk, Poland
PublicationThe Bologna process, the increasing number of higher education institutions, the mass education and the demographic problems make the quality of education and quality of the academic teachers a subject of wide public debate and concern. The aim of the paper is to identify the most preferred characteristics of a teacher working at a business school. The research problem was: What should a high-quality business school academic teacher...
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Novel chalcone-derived pyrazoles as potential therapeutic agents for the treatment of non-small cell lung cancer
PublicationLung cancer is considered to account for approximately one-fifth of all malignant tumor-related deaths worldwide and is therefore one of the most lethal malignancies. Pyrazole scaffold possesses a wide range of biological and pharmacological activities, which play important roles in medicinal chemistry. The present study reports the synthesis and in vitro biological characterization of nine pyrazoles derived from chalcones as potential...
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Spectral Methods for Modelling of Wave Propagation in Structures in Terms of Damage Detection—A Review
PublicationModern methods of detection and identification of structural damage direct the activities of scientific groups towards the improvement of diagnostic methods using for example the phenomenon of mechanical wave propagation. Damage detection methods that use mechanical wave propagation in structural components are extremely effective. Many different numerical approaches are used to model this phenomenon, but, due to their universal...
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Instantaneous Impedance Analysis of Non-Stationary Corrosion Process: a Case Study of Carbon Steel in 1M HCl
PublicationThe paper concerns the problem of evaluation of stationarity of carbon steel corrosion in 1M HCl. Comparison of corrosion rate with addition of corrosion inhibitor to the reference measurement is the most often used way of evaluating inhibitor efficiency. Such an approach is valid only if corrosion rate is a stationary process. Two complementary techniques were used simultaneously: volumetric analysis of evolved hydrogen and instantaneous...
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Identification, Assessment and Automated Classification of Requirements Engineering Techniques
PublicationSelection of suitable techniques to be used in requirements engineering or business analysis activities is not easy, especially considering the large number of new proposals that emerged in recent years. This paper provides a summary of techniques recommended by major sources recognized by the industry. A universal attribute structure for the description of techniques is proposed and used to describe 33 techniques most frequently...
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I protagonisti della grande distribuzione in Europa
PublicationThe chapter outlines the main aspects of the history of some of the most important big European department stores (El Corte Ingles, Auchan, Carrefour, LeClerc, Aldi, Esselunga and the Finiper Group,
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Examples of Original Descriptive Geometry Task Items
PublicationThe paper presents several descriptive geometry drawing tasks and a comprehensive approach to their evaluation. The results as the task profile include the most important features and enable interpretation of the tasks in the educational system.
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Tensile strength of a weave tendon suture using tendons of different sizes
PublicationThis study compared the maximum load, stress, elongation at failure and the mode of failure of three kinds of tendons most frequently used for tendon grafting and tendon transfers, using the Pulvertaftweave suture.
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Study of passive deck-flaps flutter control system on full bridge model. II: Results
PublicationZaprezentowano badania parametryczne systemu sterowania flatterem przy pomocy dołączonych stateczników na modelu wyprowadzonego w formalizmie metody elementów skończnych. Wyniki wskazują na efektywność systemu stosującego symetryczne sprzężenie ruchu stateczników z ruchem skrętnym mostu.