Search results for: SURFACE ENGINEERING
-
Comparison of volume-and surface-detention-time distributions
PublicationCzas zatrzymania ścieków w reaktorze jest bardzo ważnym parametrem projektowym. Jego wyznaczenie jest trudne i kłopotliwe. Z tego względu zbadano możliwość zastąpienia wartości tego parametru, wyznaczonej tylko dla swobodnej powierzchni ścieków. W wyniku stwierdzono dopuszczalność takiej zamiany.
-
N-doped graphene quantum dot-decorated MOF-derived yolk-shell ZnO/NiO hybrids to boost lithium and sodium ion battery performance
PublicationSurface engineering at the nanoscale to obtain robust interface between metal oxides and quantum dots is essential for improving the performance and stability of battery materials. Herein, we designed and prepared novel N-doped graphene quantum dot-modified ZnO/NiO anode materials with a well-defined yolk-shell structure for lithium and sodium-ion batteries. NG QDs were assembled on the ZnO/NiO microspheres using three different...
-
Wave transmission across surface interfaces in lattice structures
PublicationWithin the lattice dynamics formulation, we present an exact solution for anti-plane surface waves in a square lattice strip with a surface row of material particles of two types separated by a linear interface. The considered problem is a discrete analog of an elastic half-space with surface stresses modelled through the simplified Gurtin–Murdoch model, where we have an interfacial line separating areas with different surface...
-
On stress singularity near the tip of a crack with surface stresses
PublicationIn the framework of the simplified linear Gurtin–Murdoch surface elasticity we discuss a singularity of stresses and displacements in the vicinity of a mode III crack. We show that inhomogeneity in surface elastic properties may significantly affect the solution and to change the order of singularity. We also demonstrate that implicitly or explicitly assumed symmetry of the problem may also lead to changes in solutions. Considering...
-
Silniki spalinowe zasilane biogazem jako perspektywa polskiej energetyki rozproszonej = Biogas IC engines as a perspective of Polish decentralized power engineering
PublicationW referacie zamieszczono charakterystykę wykorzystania biogazu, jako źródła energii odnawialnej, do zasilania agregatów kogeneracyjnych z silnikami spalinowymi. Wskazano na podobieństwa tego typu instalacji do konstrukcji stosowanych w okrętownictwie i zaproponowano wykorzystanie doświadczeń projektowych i eksploatacyjnych z obszaru okrętownictwa do rozwoju polskiej energetyki rozproszonej opartej na elektrociepłowniach zasilanych...
-
Human Umbilical Vein Endothelial Cells (HUVECs) Co-Culture with Osteogenic Cells: From Molecular Communication to Engineering Prevascularised Bone Grafts
Publication -
Methodical engineering of defects in MnXZn1-X O(x = 0.03, and 0.05) nanostructures by electron beam for nonlinear optical applications: A new insight
Publication -
Hydraulic analysis of causes of washout of Gdynia-Orłowo seashore during the flood in the Kacza river estuary
PublicationIn July 2016 in the Three-city agglomeration a rainfall episode of over a day duration and 150 mm summary rainfall height, occurred. This situation, extreme as for Polish conditions, caused significant freshets in rivers and streams running into Gdansk Bay, the Baltic Sea, and serving as collectors of rainfall waters for the sea-coast towns. In many areas of the Three-city flood phenomena and overflows took place. The flood also...
-
3D porous graphene-based structures- synthesis and applications
PublicationPorous carbon-based materials are of the great industrial and academic interest due to their high surface area, low density, good electrical conductivity, chemical inertness and low cost of fabrication. Up to now, the main approach to obtain porous carbon structures has involved the pyrolysis of carbonaceous natural or synthetic precursors. After the isolation of graphene, the interest in 3D porous graphene-based structures (called...
-
The use of liquid crystal thermography TLC and particle image velocimetry PIV in selected technical applications
PublicationNowadays, the energy cost is very high and this problem is carried out to seek techniques for improvement of the aerothermal and thermal (heat flow) systems performances in different technical applications. The transient and steady-state techniques with liquid crystals for the surface temperature and heat transfer coefficient or Nusselt number distribution measurements have been developed. The flow pattern produced by transverse...
-
Spectroscopic studies of Nb-doped tricalcium phosphate glass-ceramics prepared by sol-gel method
PublicationCalcium-phosphate based glasses and glass-ceramics play a crucial role in the tissue engineering development. Apart from their high biocompatibility and excellent ability to undergo varying degrees of resorbability1, they exhibit relatively high bioactivity and due to that they are commonly used as bone and dental implants. A substantial research effort is devoted to improve calcium-phosphate materials physico-chemical properties...
-
Polyurethanes Crosslinked with Poly(vinyl alcohol) as a Slowly-Degradable and Hydrophilic Materials of Potential Use in Regenerative Medicine
PublicationNovel, slowly-degradable and hydrophilic materials with proper mechanical properties and surface characteristics are in great demand within the biomedical field. In this paper, the design, synthesis, and characterization of polyurethanes (PUR) crosslinked with poly(vinyl alcohol) (PVA) as a new proposition for regenerative medicine is described. PVA-crosslinked PURs were synthesized by a two-step polymerization performed in a solvent...
-
Joanna Sypniewska mgr inż.
PeoplePhD student in the field of materials engineering at Gdansk University of Technology. Working on laser surface modification of titanium alloys for biomedical applications
-
The corrosion resistance of laser surface alloyed stainless steels
Publication -
The influence of road surface unevenness on tyre rolling resistance
PublicationThe geometric characteristics of road surface substantially affect the interaction between tyre and road. Depending on pavement texture wavelength, the texture chiefly affects tyre/road friction, rolling resistance, interior and exterior noise, tyre wear, and ride comfort. The article presents results of investigations on the influence of road surface unevenness on the rolling resistance of passenger car and truck tyres. The tests...
-
Surface diffusion and cluster formation of gold on the silicon (111)
PublicationPurpose: Investigation of the gold atoms behaviour on the surface of silicon by molecular dynamics simulation method. The studies were performed for the case of one, two and four atoms, as well as incomplete and complete filling of gold atoms on the silicon surface. Design/methodology/approach: Investigations were performed by the method of molecular dynamics simulation using the Large-scale Atomic/Molecular Massively Parallel...
-
UPS na pierwszej linii frontu. - Tł. z Plant Engineering, February 2007. - Tyt. oryg.: UPS on the front line / Scott Siddens
PublicationOpisano możliwości techniczne nowoczesnych rozwišzań systemów zasilania bezprzerwowego UPS.
-
Nauczanie geodezji w środowisku dyscyplin geoinżynieryjnych poprzez analizę trendów.Teaching of land surveying in the environment of geo-engineering sciences through trend analysis.
PublicationZdaniem autorów interesującym może być pokazanie dwóch biegunów myślenia o nauczaniu geodezji z wykorzystaniem trendów istniejących w technologii konfrontowanych z rozwiązaniami komercyjnymi. W artykule przedstawione zostają punkty widzenia geodetów, absolwentów tej samej uczelni:- wykładowcy wydziału geodezyjnego, który zmieniając środowisko pracy naukowej, porównuje swoje doświadczenia dydaktyczne z zastanym stanem na uczelni...
-
Addressing challenges of BiVO4 light-harvesting ability through vanadium precursor engineering and sub-nanoclusters deposition for peroxymonosulfate-assisted photocatalytic pharmaceuticals removal
PublicationIn this study, we present a complex approach for increasing light utilisation and peroxymonosulfate (PMS) activation in BiVO4-based photocatalyst. This involves two key considerations: the design of the precursor for BiVO4 synthesis and interface engineering through CuOx sub-nanoclusters deposition. The designed precursor of ammonium methavanadate (NH4VO3, NHV) leads to reduction in particle size, better dispersion and improved light...
-
The effect of depth of surface layers constituted by vacuum technologies on pitting
PublicationThe paper presents the results of a study of the effect of vacuum technologies of formation of surface layers on pitting of associated elements in a lubricated, heavy-load rolling contact. The study has shown that increase in a PVD coat depth is accompanied by decrease in the fatigue friction pair.
-
Experimental bases for the rail track surface damage detection system
PublicationA diagnosis of rail surface is generally based on the classical method of direct assessment and track geometry measurements. Identification and qualification of inequality and damage on the surface rails is depend on the skills and experience person who conducting inspection. In times of increasing exploitation of railways, infrastructure managers decide to use systems supporting the assessment of technical condition of the railways....
-
The Effect of Spikes Occurrence on Surface Texture Parameter Assessments
Publication -
Laser Surface Treatment of Sintered Stainless Steels for Wear Resistance Enhancement
Publication -
Effect of surface roughness on thermal-hydraulic characteristics of plate heat exchanger
PublicationIn the paper the experimental analysis of passive heat transfer intensification in the case of modeled plate heat exchanger is conducted. The plate heat exchanger is chosen for the analysis because this kind of heat exchangers could be prospectively applied in the ORC systems, however other areas or application are equally possible. The experimental setup was assembled at the Department of Energy and Industrial Apparatus of Gdansk...
-
Thermohydraulic and thermoeconomic performance of a marine heat exchanger on a naval surface ship
Publication -
PV installations and the safety of residential buildings
PublicationThe dynamic development of the photovoltaic industry entails threats that have a direct impact on the safety of residential buildings. Appropriate design of a PV installation can be a challenge due to the multifaceted nature of this issue. The designer should take into account issues related to the selection of electrical parameters of the installation, adapting lightning and surge protection in accordance...
-
Effects of Storing Flux-Cored Wires under Various Conditions
PublicationWelding processes involving the use of flux-cored wires are becoming increasingly popular, particularly in shipbuilding as well as in off-shore and civil engineering. The article presents characteristics of the welding process, its areas of application as well as advantages and disadvantages (e.g. necessity of ensuring appropriate conditions for the storage of filler metal wires). The satisfaction of quality-related requirements...
-
EARTH SURFACE PROCESSES AND LANDFORMS
Journals -
Surface Topography-Metrology and Properties
Journals -
Stormwater runoff in the urbanized coastal basin of Gdańsk Urbanized basin of Gdańsk
PublicationAnthropopressure strongly affects the primal water cycle. Alternation of the natural basins imposes changes of drainage patterns, reduction of bioretention, infiltration and base flow. As a result the overland flow predominates and greater runoff rates flow into storm water collection systems and reservoirs. Moreover changing climatic conditions increase the frequency of rapid extreme weather events. Infrastructures of urban areas...
-
3D point cloud as a representation of buildings: the Nanotechnology Center and the Auditorium Novum
Open Research DataThe product presents the point cloud in the collection of a three-dimensional database in spatial order as the representations of the Nanotechnology Center and the Auditorium Novum buildings (located on the campus of the Gdańsk University of Technology) acquired in the laser scanning technology. According to its high accuracy and precision of data acquisition...
-
Bezstykowe zródła zasilania alternatywš przekazywania energii elektrycznej. - Tł. z Plant Engineering. - Tyt. oryg.: Contactless energy transfer: mobile power on the go
PublicationW artykule podano rozwišzania techniczne bezstykowego przenoszenia energii elektrycznej o mocy nawet do 16 kW w systemach zasilania. W komentarzu zestawiono szczegółowe dane mocy i sprawnoci kilku rozwišzań bezstykowych ródeł zasilania.
-
Audyt i monitorowanie energii. - Tł. z Plant Engineering. - Tyt. oryg.: Energy audits, monitoring drive data toward a solution / David Bovankovich.
PublicationW arytukule przedstawiono możliwości wykorzystania nowoczesnych rejestratorów jakości energii elektrycznej w poprawie efektywności energetycznej zakładów przemysłowych. W komentarzu podano możliwości techniczne przyrządów dostępnych na polskim rynku.
-
Archives of civil engineering. Intelligent graphic modeler integrating FE analisys of transient heat transfer with early computer-aided design of energy-efficient buildings
PublicationW pracy zaprezentowano nowatorski Modeler Rozmyty, w którym zaimplementowano unikalną koncepcję rozpoznawania. Modeler Rozmyty dokonuje ekstrakcji danych geometrycznych poprzez rozpoznanie i identyfikację niedokładnych i niejednorodnych rysunków, złożonych z prostych obiektów graficznych.
-
Versatile method employing basic techniques of genetic engineering to study the ability of low molecular weight compounds to bind covalently with DNA in cell free systems.
PublicationMechanizm działania większości leków przeciwnowotworowych oraz związków rakotwórczych polega na ich kowalencyjnym wiązaniu z DNA. Poziom tego wiązania jest zazwyczaj bardzo niski, co powoduje, że potrzebne są niezwykle czułe metody aby kowalencyjna modyfikacja mogła być w ogóle wykryta. My podjęliśmy próbę zastosowania w tym celu prostych, szybkich i sprawdzonych technik inżynierii genetycznej: metody PCR do uzyskania fragmentu...
-
Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests
PublicationsettingsOrder Article Reprints Open AccessArticle Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests by Janusz Telega 1,*ORCID,Piotr Kaczynski 1ORCID,Małgorzata A. Śmiałek 2ORCID,Piotr Pawlowski 3ORCID andRyszard Szwaba 1ORCID 1 Institute of Fluid Flow Machinery Polish Academy of Sciences (IMP PAN), Fiszera 14, 80-231 Gdansk, Poland 2 Faculty of Mechanical Engineering and Ship Technology, Institute of Naval...
-
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...
-
Vertical vibration reduction and audible sound analysis in surface grinding with electroplated tools
PublicationOne of the first approaches to the development of a grinding process monitoring system based on audible sound sensors is presented in the paper. Electroplated diamond tools (abrasive D64 and D107) were used in a modified single-disc lapping machine configuration for flat grinding of ceramics (Al2O3). The main aim of the machine modification was to reduce the vertical vibration in order to decrease the tool wear and to increase...
-
Reliability-Based Stability Analysis of a Baltic Cliff by the Combined Response Surface Method
PublicationA simple, straightforward computational procedure was proposed, incorporating the Response Surface Method (RSM) linked with the standard Monte Carlo (MC) simulation method and the Point Estimate Method (PEM). PEM samples make it possible to analyse the sensitivity of the cliff’s stability to variation in subsoil parameters and to reduce the number of random variables of the problem. The proposed methods were tested in two cases:...
-
Importance of sign conventions on analytical solutions to the wave-induced cyclic response of a poro-elastic seabed
PublicationThis paper discusses the influence of different sign conventions for strains and stresses, i.e. the solid mechanics sign convention and the soil mechanics sign convention, on the form of governing partial differential equations (the static equilibrium equations and the continuity equation) used to describe the wave-induced cyclic response of a poro-elastic seabed due to propagation of a sinusoidal surface water-wave. Some selected...
-
EFFECT OF SURFACE STATE AND STRESS ON AN OXIDATION OF THE ZIRCALOY-2 ALLOY
PublicationZr alloys are widely used as materials for nuclear fuel pellets in the nuclear industry. In the case of the LOCA or RIA happen, a temperature may locally reach high values. Even if the high temperature maintains shortly, the zirconium oxides may become permeable, absorb hydrogen appearing in cooling water from decomposition reaction and crack because of formation and brittle failure of hydrides. Such model cannot so far take into...
-
Underwater Acoustic Imaging of the Sea
PublicationAcoustic waves are a carrier of information mainly in environments where the use of other types of waves, for example electromagnetic waves, is limited. The term acoustical imaging is widely used in the ultrasonic engineering to imaging areas in which the acoustic waves propagate. In particular, ultrasound is widely used in the visualization of human organs - ultrasonography (Nowicki, 2010). Expanding the concept, acoustical imaging...
-
Modelling of some stealth features for a small navy ship at the concept design stage - part II
PublicationIn the paper a few problems associated with modelling the basic stealth features for a small ship at the concept design stage are introduced. One problem concerns the modification of the immersed ship hull using the rapid change of the ship loading condition. The second is associated with the modification of the ship boundary layer by the hull skin cover. The other stealth features of the ship are not presented in this paper. The...
-
Metal-Organic Framework (MOF)/Epoxy Coatings: A Review
PublicationEpoxy coatings are developing fast in order to meet the requirements of advanced materials and systems. Progress in nanomaterial science and technology has opened a new era of engineering for tailoring the bulk and surface properties of organic coatings, e.g., adhesion to the substrate, anti-corrosion, mechanical, flame-retardant, and self-healing characteristics. Metal-organic frameworks (MOFs), a subclass of coordinative polymers...
-
UUV and AUV Vehicles as the autonomous systems for naval applications
PublicationThere is a growing pressure to investigate how to design and build the unmanned underwater vehicles of different types which are devoted towards performing many tasks under the water surface according to the data missions. During the recent years the Department of Ship Design and Subsea Robotics, Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology designed and built a few types of unmanned underwater...
-
Ewa Kozłowska mgr inż.
PeopleEwa Kozłowska has graduated from Gdansk University of Technology in Mechanical and Medical Engineering. She is currently a PhD student at Gdańsk University of Technology in the discipline of mechanical engineering working on the topic of laser surface modifications, heat transfer and also medical device designing with the usage of computer collaboration tools by engineers and physicians.. She’s been taking part in different ERASMUS+...
-
Wettability of plasma modified glass surface with bioglass layer in polysaccharide solution
Publication -
Surface structure and propoerties of Ti6Al4V alloy laser melted at cryogenic conditions
PublicationPrzedstwiono wyniki badań mikroskopowych i mikrotwardości warstwy wierzchniej poddanej przetapianiu laserem w ciekłym aocie przy mocy laserz 3000-6000 W. Stwierdzono wzrost twardości i utworzenie zróżnicowanej warstwy wierzchniej.
-
Economic conditions for the development of energy efficient civil engineering using RES in the policy of cohesion of the European Union (2014–2020). Case study: The town of Zielona Gora
Publication -
Wykonanie instalacji elektrycznej a jakość energii elektrycznej. - Tł. z Plant Engineering. - Tyt. oryg.: Driving electrical reliability in power quality solutions / Mike Johnson
PublicationW arytukule przedstawiono rozwiązania techniczne instalacji elektrycznej poprawiające jakość energii elektrycznej. Podano charakterystykę urządzeń ograniczających przepięcia i zapewniających bezprzerwowe zasilanie odbiorników enetrgii elektrycznej.