Filters
total: 4469
-
Catalog
- Publications 3681 available results
- Journals 114 available results
- Conferences 36 available results
- People 145 available results
- Inventions 2 available results
- Projects 12 available results
- Research Teams 3 available results
- e-Learning Courses 81 available results
- Events 20 available results
- Open Research Data 375 available results
displaying 1000 best results Help
Search results for: internet voting
-
Novel application of dynamic electrochemical impedance monitoring to a cataphoretic coating process
PublicationThe paper presents a novel method of on-line impedance monitoring of cataphoretic coating application process. Utilization of dynamic electrochemical impedance spectroscopy (DEIS) overcame the fundamental problem connected with non-stationarity of the aforementioned coating deposition process, which eliminates classical impedance spectroscopy technique from a real-time description of cataphoresis. The paper illustrates selected examples...
-
In Vitro Biological Characterization of Silver-Doped Anodic Oxide Coating on Titanium
PublicationDespite the high biocompatibility and clinical effectiveness of Ti-based implants, surface functionalization (with complex osteointegrative/antibacterial strategies) is still required. To enhance the dental implant surface and to provide additional osteoinductive and antibacterial properties, plasma electrolytic oxidation of a pure Ti was performed using a nitrilotriacetic acid (NTA)-based Ag nanoparticles (AgNP)-loaded calcium–phosphate...
-
On the peculiarities of anti-plane surface waves propagation for media with microstructured coating
PublicationWe discuss new type of surface waves which exist in elastic media with surface energy. Here we present the model of a coating made of polymeric brush. From the physical point of view the considered model of surface elasticity describes a highly anisotropic surface coating. Here the surface energy model could be treated as 2D reduced strain gradient continuum as surface strain energy depends on few second spatial derivatives of...
-
Ship weather routing featuring w-MOEA/D and uncertainty handling
PublicationThe paper presents a new version of evolutionary multi-objective weather routing (WR) for ships taking into account uncertainties of weather forecasts in route optimization. The method applies authors’ w-MOEA/D algorithm: MOEA/D framework incorporating Decision Maker’s (DM) preferences by means of w-dominance relation. Owing to this, DM preferences are taken into account throughout optimization, allowing the process to focus on...
-
Characteristics of silver-dopped carbon nanotube coating destined for medical applications
PublicationCarbon nanotubes are materials demonstrating outstanding mechanical, chemical, and physical properties and are considered coatings of titanium implants. The present research is aimed to characterize the microstructure and properties of the multi-wall carbon nanotubes (MWCNTs) layer decorated with silver nanoparticles (Ag NPs) on the Ti13Nb13Zr alloy destined for long-term implants. The electrophoretic deposition of coatings...
-
Harmonic Synthesis: A Novel Electrochemical Method for Corrosion Rate Moni-toring
PublicationPraca przedstawia metodę wyznaczania chwilowej szybkości korozji metali opa-rtą na pomiarach prądów harmonicznych elektrody pobudzanej sinusoidalnym sy-gnałem napięciowym o niskiej częstotliwości i amplitudzie rzędu 10-30 mV,zapewniającej nieniszczący charakter badań. Opisano podstawy teoretyczne tejmetody nazwanej syntezą harmoniczną (SH). Jest ona oparta na dyskretnej syn-tezie quasi-stacjonarnej krzywej polaryzacji z prądów...
-
Effect of laser heating on cavitation behaviour of Fe-Cr-Mn coating.
PublicationW pracy przedstawiono badania odporności kawiracyjnej napoiny Fe-Cr-Mn po obróbce laserowej polegającej na przetapianiu napoiny wiązką lasera CO2 o mocy 1000W oraz jej nagrzewaniu w stanie stałym. Rezultaty badań wskazują,że po każdym rodzaju obróbki występuje inna podatność obrobionej powierzchni do odkształceń plastycznych pod działaniem obciążeń kawitacyjnych.
-
Influence of polyaniline primer on the corrosion properties of St3S steel - coating system
PublicationPraca przedstawia wyniki badań wpływu podkładu z polianiliny osadzonej elektrochemicznie na właściwości antykorozyjne powłoki epoksydowej na stali niskowęglowej St3S. Wykonano badania próbek nieuszkodzonych, a także próbek ze sztucznym defektem powłoki. Próbki były eksponowane na środowisko korozyjne przez 63 dni i były sukcesywnie badane za pomocą elektrochemicznej spektroskopii impedancyjnej. Postępy korozji były również oceniane...
-
Quantification of interlayer adhesion in protective coating systems using impedance spectroscopy
PublicationNowoczesne systemy powłokowe stosowane w praktyce są wielowarstwowe. Potencjalnie słabymi obszarami z punktu widzenia właściwości ochronnych są obszary międzywarstwowe. Osiągnięcie odpowiedniej przyczepności pomiędzy warstwami pozwala na polepszenie zdolności ochronnych całego zestawu. Tradycyjne metody pomiaru adhezji międzywarstwowej są destrukcyjne. Zaproponowano nową metodę oceny przyczepności międzywarstwowej przy użyciu...
-
Current mechanisms of IGP routing - expectations and possibilities in terms of QoS constraints
PublicationOd mechanizmów rutingu oczekuje się nowych możliwości z chwilą wprowadzenia wymagań QoS. W tym kontekście aktualne techniki rutingu IGP nie oferuja rozwiązań określających ścieżki gwarantujące QoS. W pracy przedstawiono propozycję rozszerzenia OSPF, które umożliwia uwzględnienie ograniczeń wynikających z QoS, gwarantując jednocześnie usługi na żądanym poziomie. To rozszerzenie zawiera zarówno liniowe jak i nieliniowe metryki. Wartości...
-
Impedance-based sensing of the interlayer adhesion loss in organic coating systems.
PublicationZmienne parametry środowiska takie jak: temperatura,wilgotność i promieniowanie UV powodują degradację własności ochronnych powłok organicznych. Stosując sensor w postaci elektrod wykonanych z prądoprzewodzącego tuszu umieszczonych pomiędzy warstwami zestawu oraz technikę spektroskopii impedancyjnej stwierdzono możliwość monitorowania utraty adhezji międzywarstwowej.
-
Internet Technology Letters
Journals -
A Study of the Impact of Internal and External Usability on Knowledge Transfer by the Means of Mobile Technologies: Preliminary Results
Publication -
The influence of ICT instruments on a transmission of interest rates by business entities and public authorities – A scientific comment
Publication -
New Type of Small Broad-Band Internal Antenna for Third Generation Mobile Phone Handsets.
PublicationW pracy przedstawiono nową szerokopasmową antenę łatową przeznaczoną dla telefonów komórkowych trzeciej generacji. Proponowana struktura zawiera obwód (rezonator) w kształcie litery U i zaliczana jest do klasy PIFA (planar inverted-F antenna). W trakcie procesu projektowania przeprowadzono szereg symulacji elektromagnetycznych (metoda momentów), których wyniki zweryfikowano w oparciu o pomiary charakterystyk wykonanego prototypu....
-
Going to extremes – a metagenomic journey into the dark matter of life
Publication -
Eating and Weight Disorders-Studies on Anorexia Bulimia and Obesity
Journals -
Jacek Czub prof. dr hab. inż.
People -
Paweł Weichbroth dr
People -
Developing Methodology for Model Tests of Floating Platforms in Low -Depth Towing Tank
PublicationThe paper presents two different methods of physical modeling of semi-submersible platform mooring system for research in low depth towing tank. The tested model was made in the scale of 1:100 resembling the "Thunder Horse" platform moored in the Gulf of Mexico at a depth of 1,920 m. Its mooring system consisted of 16 semi-taut mooring lines (chain-wire-chain) spaced starshape and attached at the bottom to suction piles. The tests...
-
Research on flue gas flow measurement and modelling in the moving grate biomass boiler
PublicationThe aim of this research was to determine the nature of gas flow in a grate boiler model by the method of Particle Image Velocimetry (PIV) and CFD. The paper presents the comparison of the PIV results with numerical simulations made in the environment of ANSYS Fluent. The main goal of the experiment was to describe the phenomena occurring on the grate. Methodology of modelling solid fuel combustion on the moving grate was proposed...
-
LLA : A New Anypath Routing Scheme Providing Long Path Lifetime in VANETs
PublicationVehicular ad-hoc networks (VANETs) are a promising solution to improve the road traffic safety, reduce the environmental pollution, or simply provide the on-board infotainment services. However, these actions are often not possible due to high mobility of vehicles causing frequent failures of VANET links. In this paper, we focus on anypath routing to improve the reliability of multihop VANET communications. In particular, the paper...
-
Protective properties of Al2O3 + TiO2 coating produced by the electrostatic spray deposition method
PublicationMechanical resistance of Al2O3 + TiO2 nanocomposite ceramic coating deposited by electrostatic spray deposition method onto X10CrAlSi18 steel to thermal and slurry tests was investigated. The coating was produced from colloidal suspension of TiO2 nanoparticles dispersed in 3 wt% solution of Al2(NO3)3, as Al2O3 precursor, in ethanol. TiO2 nanoparticles of two sizes, 15 nm and 32 nm, were used in the experiments. After deposition,...
-
A repeated game formulation of network embedded coding for multicast resilience in extreme conditions
PublicationComputer networks and data sharing applications are vital for our current society and fundamental for any available ICT solution, so that networking is considered as one of the key critical infrastructures and its correct behavior should be always enforced, even in case of disasters or severe execution conditions. Resilience is a strongly demanding nonfunctional requirement for current computer networks, and one of the key factors...
-
Technology Concept of TLP Platform Towing and Installation in Waters with Depth of 60 m
PublicationThe article is part of the design and research work conducted at the Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology, in cooperation with a number of other research centres, which concerns offshore wind farms planned to be built in the Polish zone of the Baltic sea in the next years. One of most difficult tasks in this project is building suitable foundations for each power unit consisting of a...
-
Developing a methodology for model tests of floating platforms in a towing tank of low depth
PublicationThe paper presents two ways to mooring model of semi-submersible platform for research in the small depth towing pool. The tested model was made in the likeness of 1:100 Thunder Horse platform moored in the Gulf of Mexico at a depth of 1,920 m. Its mooring system consisted of 16 semi-taut mooring lines (chain-wire-chain) spaced Star-shape and attached at the bottom to the suction piles. The tests were performed in the towing pool...
-
Vibration of the bridge under moving singular loads - theoretical formulation and numerical solution
PublicationThe paper presents the results of the numerical analysis of a simple vehicle passing over a simply supported bridge span. The bridge is modelled by a Euler-Bernoulli beam. The vehicle is modelled as a linear, visco-elastic oscillator, moving at a constant speed. The system is described by a set of differential equations of motion and solved numerically using the Runge-Kutta algorithm. The results are compared with the solution...
-
DETERMINATION OF SP3 FRACTION IN ta-C COATING USING XPS AND RAMAN SPECTROSCOPY
PublicationThe paper presents results of studies on the structure of tetrahedral amorphous carbon films (ta-C) with a thickness in the range from 20 to 280 nm, deposited using pulsed vacuum arc technique with an electromagnetic Venetian blind plasma filter. The results of the phase structure analysis, obtained using visible Raman spectroscopy and UV Raman spectroscopy methods, showed a strong dependence of the results on the presence, on...
-
Study of the electrochemical stability of polypyrrole coating on iron in sodium salicylate aqueous solution
PublicationIn this work electrochemical stability of optimized PPy film on iron in aqueous solution of sodium salicylate is studied. The main drawback of conducting polymers is their possibility to undergo an irreversible degradation (overoxidation). The overoxidized polymers lose their properties, for example, conductivity and redox activity, what excludes them from some practical applications. This study demonstrates that lowering the concentration...
-
The determinants of morphology and properties of the nanohydroxyapatite coating deposited on the Ti13Zr13Nb alloy by electrophoretic techniqe
PublicationThe titanium and its alloys belong at present to the most preferred and commonly applied biomaterials for load- bearing implants. The surfaces of biomaterials are subjected to modification, including the hydroxyapatite coatings deposited in order to ensure corrosion resistance and better joining between an implant and a bone through the possibility of ingrowth bone into the coating. In this paper, the morphology and properties...
-
Methods for physical impairment constrained routing with selected protection in all-optical networks
PublicationIn this paper, we investigate the problem of survivable all-optical routing in WDM networks with physical impairments. One of the recent key issues in survivable optical network design refers to maximization of the ratio of routeable demands while keeping the overall network cost low. In WDM networks, this goal can be achieved by routing as many demands in all-optical way as possible. Based on the latest technical trends driven...
-
Linear and branched polyester resins based on dimethyl-2,5-furandicarboxylate for coating applications
PublicationIn this study, novel bio-based hydroxyl-functional (co)polyesters from dimethyl-2, 5-furandicarboxylate (DMF), 2,3-butanediol, and a variety of comonomers viz. glycerol, pentaerythritol or trimethylolpropane are prepared using a solvent-free, bulk polycondensation technique. Extensive molecular and thermal characterization was performed to elucidate the properties of these materials. The materials showed suitable properties for solvent-borne...
-
Effect of Cr and Mn doping on ferroelectric and dielectric properties of Li1.72Na0.28Ge4O9 single crystals
PublicationLi1.72Na0.28Ge4O9 single crystals pure and slightly doped with chromium and manganese, obtained by Czochralski growth, were investigated for their ferroelectric and dielectric properties. The change in stoichometry of Li2− x Na x Ge4O9 (x = 0.28) crystals doped with Cr and Mn (0.1 mol.%) had an influence on the value of ferroelectric-to-paraelectric phase transition temperature, T c. The applied doping affects the T c value by...
-
The application of moving bed biofilm reactor to denitrification process after trickling filters
PublicationThe paper presents research of a prototype moving bed biofilm reactor (MBBR). The device was used for the post-denitrification process and was installed at the end of a technological system consisting of a septic tank and two trickling filters. The concentrations of suspended biomass and biomass attached on the EvU Perl moving bed surface were determined. The impact of the external organic carbon concentration on the denitrification...
-
Sailing Vessel Routing Considering Safety Zone and Penalty Time for Altering Course
PublicationIn this paper we introduce new model for simulation sea vessel routing. Besides a vessel types (polar diagram) and weather forecast, travel security and the number of maneuvers are considered. Based on these data both the minimal travelling costs and the minimal processing time are found for different vessels and different routes. To test our model the applications SailingAssistance wad improved. The obtained results shows that...
-
Interlayer defect evolution in an organic coating system on steel under hydromechanical loading
Publication -
Advanced coating of interior of tanks for rising environmental safety - novel applications of polyurethanes
Publication -
Moving object detection and tracking for the purpose of multimodal surveillance system in urban areas
PublicationBackground subtraction method based on mixture of Gaussians was employed to detect all regions in a video frame denoting moving objects. Kalman filters were used for establishing relations between the regions and real moving objects in a scene and for tracking them continuously. The objects were represented by rectangles. The objects coupling with adequate regions including the relation of many-to-many was studied experimentally...
-
Application of the simplified models to inverse flood routing in upper Narew river(Poland)
PublicationW pracy przedstawiono rozwiązanie zagadnienia odwrotnej transformacji przepływów z zastosowaniem uproszczonych modeli. Zastosowano model fali kinematycznej oraz równanie retencji. W pierwszym przypadku równanie całkowano w kierunku malejącego czasu zaś w drugim w kierunku przeciwnym do przepływu. Wykazano, że obydwa podejścia są równoważne. Modele zastosowano dla górnego odcinka Narwi.
-
Estimation of the excitation variances of speech and noise AR-models for enhanced speech coding
Publication -
Mitigating Stripping in Asphalt Mixtures: Pretreatment of Aggregate by Thermoplastic Polyethylene Powder Coating
Publication -
Coping styles and symptomatic manifestation of first-episode psychosis: Focus on cognitive performance
Publication -
Coping Styles, Mental Health, and the COVID-19 Quarantine: A Nationwide Survey in Poland
Publication -
The Biocompatibility and Self-Healing Effect of a Biopolymer’s Coating on Zn Alloy for Biomedical Applications
Publication -
Efficiency rating of SG Diagnostics COVID-19 antigen rapid test kit
Publication -
Effect of UV radiation and chitosan coating on the adsorption-photocatalytic activity of TiO2 particles
Publication -
Optimization of The Shortest-Path Routing with Equal-Cost Multi-Path Load Balancing
Publication -
Packet routing and frame length optimization in wireless mesh networks with multicast communications
Publication -
Boosting of photocatalytic hydrogen evolution via chlorine doping of polymeric carbon nitride
Publication -
The influence of Si4+ co-doping on the spectroscopic properties of β-NaCaPO4:Eu2+/Eu3+
Publication