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Zasadność utrzymywania założeń upraszczających w projektowaniu układów geometrycznych toru
PublikacjaW pracy podjęto kwestię licznych założeń uproszczających występujących w projektowaniu rejonu zmiany kierunku trasy kolejowej. Dotyczą one w głównym stopniu sposobu wpisywania w układ geometryczny krzywych przejściowych, mającego również wpływ na lokalizację łuku kołowego. Na podstawie przeprowadzonych rozważań wysunięto tezę, że uproszczenia występujące w projektowaniu układów geometrycznych dróg kolejowych nie mają w obecnych...
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Tramwaje niskopodłogowe w Polsce
PublikacjaW pracy przedstawiono proces rozwoju floty nowoczesnych, niskopodłogowych tramwajów, użytkowanych przez polskich przewoźników miejskich. Wskazano najczęściej wykorzystywane w kraju schematy konstrukcyjne oraz producentów pojazdów.
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OBSERWACJE JAKO PODSTAWOWE NARZĘDZIE W DIAGNOSTYCE SZYN KOLEJOWYCH
PublikacjaRosnąca liczba wykrywanych wad kontaktowo – zmęczeniowych stawia przed diagnostami nowe wyzwania. Przede wszystkim konieczne jest opracowanie nowych kryteriów oceny trwałości (przydatności) eksploatacyjnej szyn. Należy odejść od uśredniania liczby pęknięć szyn na 1 km toru. Wady w szynach powinny być analizowane w poszczególnych kilometrach linii i tokach szynowych. Bez tego nie będzie możliwe zidentyfikowanie i skwantyfikowanie...
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Tramwaje niskopodłogowe. Geneza, konstrukcje
PublikacjaW artykule opisano zmiany jakie zachodziły w budowie tramwajów na przestrzeni ponad stu lat. Skupiono się na najważniejszych schematach budowy wagonów. Opisano rozwój konstrukcji wózków tramwajowych. Krótko scharakteryzowano wady i zalety pojazdów.
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POMIARY SATELITARNE TORÓW TRAMWAJOWYCH. - cz. II
PublikacjaStosowanie geodezji tradycyjnej do określania przebiegu trasy kolejowej lub tramwajowej wymaga jej podziału na mniejsze części, które są rozpatrywane oddzielnie. Staje się to źródłem dodatkowych błędów, a całościowa ocena danego układu jest bardzo utrudniona. Alternatywą dla tego rozwiązania może być wykorzystanie precyzyjnych pomiarów satelitarnych opartych o systemy GPS i Glonass.
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Study of ZrS3-based field-effect transistors toward the understanding of the mechanisms of light-enhanced gas sensing by transition metal trichalcogenides
PublikacjaExtending knowledge of the properties of low-dimensional van der Waals materials, including their reactivity to the ambiance, is important for developing innovative electronic and optoelectronic devices. Transition metal trichalcogenides with tunable optical band gaps and anisotropic conductivity are an emerging class among low- dimensional structures with the possibility of gate tunability and photoreactivity. These properties...
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Fine-Tuning the Photocatalytic Activity of the Anatase {1 0 1} Facet through Dopant-Controlled Reduction of the Spontaneously Present Donor State Density
PublikacjaThe present study highlights the importance of the net density of charge carriers at the ground state on photocatalytic activity of the faceted particles, which can be seen as a highly underexplored problem. To investigate it in detail, we have systematically doped {1 0 1} enclosed anatase nanoparticles with Gd3+ ions to manipulate the charge carrier concentration. Furthermore, control experiments using an analogical Nb5+ doped...
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Improved energy management technique in pipe-embedded wall heating/cooling system in residential buildings
PublikacjaEffective and environmentally responsive techniques of energy management in residential buildings are desirable for the resulting reduction of energy costs and consumption. In this paper, an improved and efficient technique of energy management in pipe-embedded wall heating/cooling systems, called the Thermal Barrier, is described. Specifically, the Thermal Barrier is a technique focused on the management and control of heat...
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Improved energy management technique in pipe-embedded wall heating/cooling system in residential buildings
PublikacjaEffective and environmentally responsive techniques of energy management in residential buildings are desirable for the resulting reduction of energy costs and consumption. In this paper, an improved and efficient technique of energy management in pipe-embedded wall heating/cooling systems, called the Thermal Barrier, is described. Specifically, the Thermal Barrier is a technique focused on the management and control of heat supply...
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Daniel Załuski dr hab. inż. arch.
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Framework for Structural Health Monitoring of Steel Bridges by Computer Vision
PublikacjaThe monitoring of a structural condition of steel bridges is an important issue. Good condition of infrastructure facilities ensures the safety and economic well-being of society. At the same time, due to the continuous development, rising wealth of the society and socio-economic integration of countries, the number of infrastructural objects is growing. Therefore, there is a need to introduce an easy-to-use and relatively low-cost...
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The effects of vehicle restraint systems on road safety
PublikacjaKey to understanding the needs and tools of road infrastructure management for preventing run-off-road crashes or minimising their consequences, is to identify the hazads and sources of hazards caused by wrong or improper use of road safety devices and identify errors in the desifn, structure, construction and operation of road safety devices. Studying such an extended scope of the problem required fieldwork and surveys with road...
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Socio-economic exclusion as a hindrance of economic development. A comparative study for European countries
PublikacjaThe paper consists of multidimentional analysis of social and economic exclusions which are treated as main barriers for economic development. This complex study covers all European countries. The timespan is set for 2004-2011
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The need for linear revitalization. Gdynia case
PublikacjaThe aim of the article is to discuss the need of defining and implementation of the linear revitalization - the new approach related to the revitalization processes. The results of the preliminary investigations indicate that this kind of revitalization seems to be an important tool supporting city management and planning, especially in cases of cities fragmentation - causing lack of physical, social, economic and ecological cohesion....
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International Conference on Advances in Infrastructure for Electronic Business, Science, and Education on the Internet
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State of the Art in Open Platforms for Collaborative Urban Design and Sharing of Resources in Districts and Cities
PublikacjaThis work discusses recent developments in sharing economy concepts and collaborative co-design technology platforms applied in districts and cities. These developments are being driven both by new technological advances and by increased environmental awareness. The paper begins by outlining the state of the art in smart technology platforms for collaborative urban design, highlighting a number of recent examples. The case of peer-to-peer...
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Rush to become "globally relevant"- culture based development as a significant factor towards sustainable urbanization (Gdansk Case)
PublikacjaThe paper shows possibilities and barriers as well as attempts to implement culture based development in Gdansk. It can play a significant role in preventing uncontrolled suburban residential development and further spatial polarization of the city.
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Determination of ionic conductivity in the Bi-Si-O and Pb-Si-O glasses
PublikacjaImpedance spectroscopy measurements in various gas atmospheres were carried out in order to explain the doubts about the type of carriers and the mechanism of electrical conductivity in Bi-Si-O and Pb-Si-O glasses. In bismuth silicate glass, a typical ionic conductivity with oxygen ions as charge carriers was observed. The level of electrical conductivity of the glass at 400 °C was 5 × 10−8 S·cm−1 , with the activation energy of...
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Effect of the Road Environment on Road Safety in Poland
PublikacjaRun-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...
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How does institutional and natural social support shape the beliefs about psychological help among policemen?
PublikacjaEffectiveness of social support mechanisms results from interacting subjective factors (beliefs about help from others) and context (social network available). Organized institutional support and perception of natural support reduce barriers in obtaining psychological help.
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Permeability of the small intestinal mucus for physiologically relevant studies: Impact of mucus location and ex vivo treatment
PublikacjaThe small intestinal mucus is a complex colloidal system that coats the intestinal mucosa. It allows passage on nutrients/pharmaceuticals from the gut lumen towards the epithelium, whilst preventing it from direct contact with luminal microorganisms. Mucus collected from intestinal tissue is often used in studies looking at inter-mucosal transport of food particulates, drug carriers, etc. However, detaching the highly hydrated...
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Modeling, simulation, and validation of a TB41 crash test of the H2/W5/B concrete vehicle restraint system
PublikacjaThe paper addresses numerical simulations of a concrete vehicle restraint system. The model is described in detail. The advanced material law of the continuous surface cap model was used to analyze the damage locations in concrete barrier segments. The results were validated against the TB41 full-scale crash test. The test was conducted in compliance with European standard EN 1317, and the validation was performed in accordance...
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Infrastruktura IT przedsiębiorstw
Kursy Online -
INFRASTRUKTURA IT PRZEDSIĘBIORSTW
Kursy Online -
Beliefs about psychological help among firemen
PublikacjaThe aim of this study was to identify beliefs and perceived barriers in psychological help. Findings: 1. Occupational stress and participation in traumatic rescue actions was related with negative beliefs. 2. Firemen were afraid of a commader's reaction. 3. Avoidance coping accounts for fear about stigmatization.
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Disappearing Bridge
PublikacjaThe main parts of the Hafen City’s residential development are still under construction. Close by, uninviting offi ce buildings defi ne Hammerbrook. Neighboring Rothenburgsort is inhabited by many citizens but lacks cultural attractions. Street traffic and water barriers distinctly separate the districts.
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Framework for extracting rails and setting-out railway line axis based on UAV photogrammetric measurements
Dane BadawczeTechnical diagnostics enables assessing the current technical condition of a railway line and adjacent infrastructure, and to forecast its changes over a specific time horizon. One of its elements is the periodic monitoring of rail position and their geometry. The data set presents a new framework for the setting-out of a railway track axis. The process...
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Hossein Nejatbakhsh Esfahani Dr.
OsobyMy research interests lie primarily in the area of Learning-based Safety-Critical Control Systems, for which I leverage the following concepts and tools:-Robust/Optimal Control-Reinforcement Learning-Model Predictive Control-Data-Driven Control-Control Barrier Function-Risk-Averse Controland with applications to:-Aerial and Marine robotics (fixed-wing UAVs, autonomous ships and underwater vehicles)-Multi-Robot and Networked Control...
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Analysis of the image force effects on the recombination at the donor-acceptor interface in organic bulk heterojunction solar cells
PublikacjaWe consider the influence of image force effects on the recombination at the donor-acceptor interface in organic bulk heterojunction solar cells. The conclusion is that the charge carriers of one sign located in the material with lower permittivity recombine at the boundary between donor and acceptor phases. This process competes with the recombination of opposite sign charge carriers, leading to the reduction of the Langevin-type...
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Bohdan Zadroga prof. dr hab. inż.
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Topical delivery of pharmaceutical and cosmetic macromolecules using microemulsion systems
PublikacjaMicroemulsions are transparent, thermodynamically stable colloidal systems. Over the recent years, they have been increasingly investigated due to their potential as skin delivery vehicles for a wide range of drug molecules. The nanoscale particle size and the specificity of microemulsion components are the main features determining the skin permeation process. However, in order to effectively cross the skin barrier, the active...
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Photoelectric properties of a novel MEH-PPV/F16ZnPc heterojunction
PublikacjaPhotoelectric properties of a novel poly[2-methoxy-5-(2-ethylhexyloxy-p-phenylenevinylen)] (MEH-PPV)/perfluorozincphthalocyanine (F16ZnPc) planar heterojunction provided with BCP and MoO3 buffer layers sandwiched between indium tin oxide (ITO) and Ag are shown. Efficient photogeneration of charge carriers at this junction is observed. Effect of bathocuproine (BCP) and MoO3 buffer layers on the performance of cells is analysed....
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High order of nongeminate recombination in organic bulk heterojunction solar cells
PublikacjaWe analyze high order of nongeminate recombination in organic donor–acceptor bulk heterojunction solar cells. The model of recombination where an exciton annihilates on an electron–hole Langevin bound pair near donor–acceptor interface has been applied in our studies. We obtained satisfactory agreement between experimental results and theoretical calculations for the concentration dependences of several parameters characterizing...
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Stable nanoconjugates of transferrin with alloyed quaternary nanocrystals Ag–In–Zn–S as a biological entity for tumor recognition
PublikacjaOne way to limit the negative effects of anti-tumor drugs on healthy cells is targeted therapy employing functionalized drug carriers. Here we present a biocompatible and stable nanoconjugate of transferrin anchored to Ag-In-Zn-S quantum dots modified with 11-mercaptoundecanoic acid (Tf-QD) as a drug carrier versus typical anticancer drug, doxorubicin. Detailed investigations of Tf-QD nanoconjugates without and with doxorubicin...
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Application of probabilistic tools to extend load test design of bridges prior to opening
PublikacjaLoad tests of bridges are widely performed in a large number of countries. Deterministic comparison of measurement results to the theoretical, FEM (finite element method)-based outcomes with possible further calibration is mostly applied. Sometimes, the data collected in the tests are also used to calibrate the reliability factors of bridge structures or their components. This work proposes to complement the stage of the load test...
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A first-principles study of electron attachment to the fully hydrated bromonucleobases
PublikacjaDegradation mechanism of four brominated nucleobases (BrX), potential DNA radiosensitizers, is studied in explicit water solution, using ab initio molecular dynamics. Several fs long dynamics is needed to localize an electron on the nucleobase. Produced by electron attachment BrX anion radical degrades through the bromide anion abstraction, barrier-free (purines) or with low barrier (pyrimidines), to a reactive nucleobase radical....
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Jan Amos Jelinek dr hab., prof. APS
OsobyDr hab. Jan Amos Jelinek, prof. APS. pracownik naukowo-dydaktyczny w Instytucie Wspomagania Rozwoju Człowieka i Edukacji na Akademii Pedagogiki Specjalnej w Warszawie. Zajmuje się badaniem rozwoju poznawczego dzieci oraz skuteczności organizowanych sytuacji edukacyjnych w zakresie edukacji technicznej, edukacji przyrodniczej (przeważnie przyrody nieożywionej) oraz edukacji matematycznej. Realizuje badania nad rozpoznawaniem i śledzeniem...
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Częstość i konsekwencje wypadnięcia pojazdu z drogi na przykładzie województwa pomorskiego
PublikacjaWypadnięcie pojazdu z drogi jest nadal jednym z nierozwiązanych problemów bezpieczeństwa ruchu drogowego, gdyż skutkiem tego zdarzenia są wtórne wypadki kończące się: wywróceniem pojazdu lub uderzeniem pojazdu w obiekt znajdujący się w pobliżu drogi. Tego rodzaju zdarzenia wciąż stanowią ponad jedną czwartą cześć wypadków na drogach zamiejskich, a ich skutki są tragiczne, gdyż liczba ofiar śmiertelnych przekracza trzecią część...
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Mechanism for Damage to DNA by Low-Energy Electrons
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Projekt Zespołowy - 5T_I_IT - 2022/2023
Kursy OnlineProjekt Zespołowy - sem 5. Transport - Infrastruktura Transportu
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Projekt Zespołowy - Infrastruktura Transportu - 6 sem. r. 2022/2023
Kursy OnlineProjekt Zespołowy - sem 6. Transport - Infrastruktura Transportu
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Identifying Selected Tram Transport Risks
PublikacjaIn the area of transport infrastructure risks, infrastructure is inspected for safety. It is an element of transport safety management based on risk management and forms part of preventative activities and measures. As regards tram infrastructure which is a component of urban transport infrastructure, there are potential collisions with cars, cyclists and pedestrians. Data from Gdansk Buses and Trams...
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Innovative activity of SMEs In Poland
PublikacjaInnovative activity of enterprises is determined by many factors. On one hand, these are external factors creating a sort of innovative climate in the economy, on the other hand - there are many internal factors stimulating or reducing the intensity of innovative activities. What influences the innovativeness of enterprises is the effectiveness of the system supporting innovations, which was stated by for example Pyciński and Żołnierski...
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Reducing Air Pollutant Emissions from the Residential Sector by Switching to Alternative Energy Sources in Single-Family Homes
PublikacjaThe paper discusses a scenario for adapting residential buildings to the requirements of the EU climate and energy package. It analyzes the option of reducing pollutant emissions to ambient air by switching to alternative energy sources in a typical single-family residential building. The most common sources of energy in central heating and ventilation systems and water heating systems were compared, and the analyzed energy carriers...
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Zarządzanie Projektami Transportowymi - 7T_I_IT - 2022/23
Kursy OnlineZarządzanie Projektami Transportowymi - sem 7 Transport - Infrastruktura Transportu
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Intranet and internal communication in an organization
PublikacjaOne of the conditions of an organizational effectiveness is acommunication. However, communication meets some obstacles. Newtechnological opportunities, such as Intranet support enterprise communication process and bring some benefits. This paper includes: the description of communication process and its barriers, the analyze of relationships between communication and an organizational effectiveness, advantages from implementing...
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Which transport policies increase physical activity of the whole of society? A systematic review
PublikacjaPurpose: 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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Water absorption and blistering of glass fibre-reinforced polymer marine laminates with nanoparticle-modified coatings
PublikacjaMacro and microstructural damage was studied in typical glass fibre-reinforced polymer laminates with two types of coating systems – (a) isophtalic gel coat: pure or mixed with SiO2 nanoparticles 5 wt% (5%N) or 10 wt% (10%N) and (b) a two-layer coating system: urethane-modified vinyl ester-based gel coat and additional polyester barrier coat layer. Accelerated tests were performed at 50C for 50 days for specimens with nanoparticle-modified...
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CERTIFICATION SYSTEM AS A TOOL FOR IMPROVING THE SAFETY AND SUSTAINABILITY OF SCHOOL-RELATED TRAVELS
PublikacjaDespite the well-established physical, social, emotional, cognitive, and spatial benefits of active and autonomous school commuting of children and adolescents', many are driven by car. Pilot surveys and field research held in 2019 in 10 Gdansk primary schools confirmed this trend. The article presents a certification system for schools, commissioned by the City of Gdańsk, which is an element of a systemic solution shaping patterns...
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Projekt zespołowy (IT) - 2T_II_IT - 2022/2023
Kursy OnlineProjekt zespołowy (IT) - sem. 2 II stopnia Transport - Infrastruktura Transportu