Wyniki wyszukiwania dla: vertical graphene

• Controlled oxidation of graphite to graphene oxide with novel oxidants in a bulk scale

  Publikacja

  • M. Wojtoniszak
  • E. Mijowska

  - JOURNAL OF NANOPARTICLE RESEARCH - Rok 2012

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• Self-assembly of vertically oriented graphene nanostructures: multivariate characterisation by Minkowski functionals and fractal geometry

  Publikacja

  • M. Pierpaoli
  • M. Ficek
  • P. Jakóbczyk
  • J. Karczewski
  • R. Bogdanowicz

  - ACTA MATERIALIA - Rok 2021

  The enormous self-assembly potential that graphene and its derived layered materials offer for responding to the contemporary environmental challenges has made it one of the most investigated materials. Hence, tuning its extraordinary properties and understanding the effect at all scales is crucial to tailoring highly customised electrodes. Vertically oriented graphene nanostructures, also known as carbon nanowalls (CNWs), due...

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• The effect of boron concentration on the electrical, morphological and optical properties of boron-doped nanocrystalline diamond sheets: Tuning the diamond-on-graphene vertical junction

  Publikacja

  • M. Rycewicz
  • A. Nosek
  • D. H. Shin
  • M. Ficek
  • J. G. Buijnsters
  • R. Bogdanowicz

  - DIAMOND AND RELATED MATERIALS - Rok 2022

  In this paper, the effect of boron doping on the electrical, morphological and structural properties of free-standing nanocrystalline diamond sheets (thickness ~ 1 μm) was investigated. For this purpose, we used diamond films delaminated from a mirror-polished tantalum substrate following a microwave plasma-assisted chemical vapor deposition process, each grown with a different [B]/[C] ratio (up to 20,000 ppm) in the gas phase....

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• Pelvic vertical shear fractures: The damping properties of ligaments depending on the velocity of vertical impact load

  Publikacja

  • K. Arkusz
  • T. Klekiel
  • G. Sławiński
  • R. Będziński

  - Rok 2019

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• Synthesis, dispersion, and cytocompatibility of graphene oxide and reduced graphene oxide

  Publikacja

  • M. Wojtoniszak
  • X. Chen
  • R. Kalenczuk
  • A. Wajda
  • J. Łapczuk
  • M. Kurzewski
  • M. Drozdzik
  • P. Chu
  • E. Borowiak-Palen
  • E. Mijowska

  - Colloids and Surfaces B: Biointerfaces - Rok 2012

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• Effect of graphene thickness on photocatalytic activity of TiO2-graphene nanocomposites

  Publikacja

  • M. Aleksandrzak
  • P. Adamski
  • W. Kukułka
  • B. Zielinska
  • E. Mijowska

  - Applied Surface Science - Rok 2015

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• Pedestrian on footbridges, vertical loads and response

  Publikacja

  • K. Żółtowski

  - Rok 2008

  The paper is a synthesis of the experimental and theoretical investigations on dynamics of pedestrian bridges under vertical load The subject is divided into four issues.1) The pedestrian as a vertical dynamic load on footbridges, theoretic load function for walking and crouching.2) Crowd walking on the footbridge - pedestrian flow.3) Vertical lock-in effect.4) Response of the footbridge - numeric and side test results, -...

• On Directed Lattice Paths With Vertical Steps

  Publikacja

  • M. Dziemiańczuk

  - DISCRETE MATHEMATICS - Rok 2016

• Influence of the wall on vertical bubble motion

  Publikacja

  • D. Mikielewicz
  • J. Wajs

  - Rok 2003

  Zaprezentowano model siły odpychającej, działającej na kulę podczas przepływu wzdłuż ściany pionowej. Modelowana siła ma charakter okresowy. Uzyskano satysfakcjonującą zgodność pomiędzy zmierzoną i obliczoną wartością tej siły.

• GRAPHENE IN GAS CHEMIRESISTORS

  Publikacja

  • A. M. Frymark
  • P. Jasiński

  - Rok 2013

  Graphene has a range of unique physical properties which could be exploited in gas sensing. Every atom of graphene may be considered as a surface atom, able to interact even with single molecule of the target gas or vapour species resulting in the ultrasensitive sensor response. In this paper the potential of graphene as a nanomaterial for fabricating chemiresistors was described. Recent development in graphene sensors was considered...

• Comparison of the Toxicity of Pristine Graphene and Graphene Oxide, Using Four Biological Models

  Publikacja

  • S. Jaworski
  • B. Strojny-Cieślak
  • M. Wierzbicki
  • M. Kutwin
  • E. Sawosz
  • M. Kamaszewski
  • A. Matuszewski
  • M. Sosnowska
  • J. Szczepaniak
  • K. Daniluk... i 5 innych

  - Materials - Rok 2021

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• HEAVE MOTION OF A VERTICAL CYLINDER WITH HEAVE PLATES

  Publikacja

  • E. Ciba

  - Polish Maritime Research - Rok 2021

  The shape of a vertical cylinder resembles the classic form of a spar platform. Spar platforms are floating platforms that are successfully used in waters of great depths and have several advantages that mean they are readily used in the oil industry. Many of these advantages are also relevant to their application for offshore wind turbines, which is currently being considered. In the hydrodynamic analysis of spar platforms, the...

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• DETERMINATION OF VERTICAL DISPLACEMENTS IN RELATIVE MONITORING NETWORKS

  Publikacja

  • D. Filipiak-Kowszyk
  • W. Kamiński

  - Archives of Civil Engineering - Rok 2020

  The problem of determining displacements of objects is an important and current issue, in particular in terms of operational safety. This is a requirement that covers geodetic, periodic control measurements in order to determine horizontal and vertical displacements. The paper is focused on the analysis of vertical displacements. Geodetic measurements and their interpretation allow to reduce the risk of possible structural catastrophes....

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• Natural convection in symmetrically heated vertical channels

  Publikacja

  • W. Lewandowski
  • M. Ryms
  • H. Denda

  - INTERNATIONAL JOURNAL OF THERMAL SCIENCES - Rok 2018

  The study describes natural convection through a vertical channel, open on four sides and bound by two isothermal walls. Both balancing and infrared experimental investigations were performed in air (Pr = 0.71) to estimate the impact of channel width s and wall-to-ambient temperature difference (tw - t∞) on natural convective heat transfer, the formation of air flow patterns and the rate of flow pattern formation. The study was...

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• Vertical Temperature Stratification of the Gulf of Gdansk Water

  Publikacja

  • G. Grelowska
  • E. Kozaczka
  • D. Witos-Okrasińska

  - Rok 2018

  The Baltic Sea is characterized by variable hydroacoustic conditions, which depend on hydrological conditions throughout the year. The temperature of the water is the factor that has the greatest impact on the changes in the speed of the sound in this basin. Even at a small depth, we can observe a large temperature gradient affecting the accuracy of the conducted research using hydroacoustic devices. A characteristic feature of...

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• Graphitic carbon nitride/graphene oxide/reduced graphene oxide nanocomposites for photoluminescence and photocatalysis

  Publikacja

  • M. Aleksandrzak
  • W. Kukulka
  • E. Mijowska
  • W. Kukułka

  - Applied Surface Science - Rok 2017

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• Graphene oxide, reduced graphene oxide and composite thin films NO2 sensing properties

  Publikacja

  • K. Dunst
  • P. Jasiński

  - Rok 2016

  A graphene oxide (GO), reduced graphene oxide (RGO) and poly(3,4-ethylenedioxytiophene)-reduced graphene oxide (PEDOT-RGO composite) gas sensors were successfully fabricated using an electrodeposition method. The electrodeposition was carried out in aqueous GO dispersions. To obtain RGO and PEDOT-RGO, the electrochemical reduction of GO and PEDOT-GO was carried out in 0.1 M KCl at a constant potential of −0.85 V. The GO, RGO and PEDOT-RGO...

• Graphene oxide, reduced graphene oxide and composite thin films NO2 sensing properties

  Publikacja

  • K. Dunst
  • B. Scheibe
  • G. Nowaczyk
  • S. Jurga
  • P. Jasiński

  - MEASUREMENT SCIENCE & TECHNOLOGY - Rok 2017

  A graphene oxide (GO), reduced graphene oxide (RGO) and poly(3,4-ethylenedioxytiophene)- reduced graphene oxide (PEDOT-RGO composite) gas sensors were successfully fabricated using an electrodeposition method. The electrodeposition was carried out in aqueous GO dispersions. In order to obtain RGO and PEDOT-RGO, the electrochemical reduction of GO and PEDOT-GO was carried out in 0.1 M KCl at constant potential of −0.85 V. The GO, RGO...

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• Graphene Reinforced Phenolic Foams

  Publikacja

  • M. Strankowski

  - Rok 2022

  Phenolic foams (PF) belong to the polymeric materials, which are very attractive from the point of many possible applications such as insulation or fire protection materials. This chapter attempts to explain the influence of graphene and graphene derivatives on the phenolic foams. This work briefly presents different graphene nanoparticles introduced to the phenolic foams matrix, in terms of impact on the thermal, mechanical, and...

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• Morphology, Mechanical and Thermal Properties of Thermoplastic Polyurethane Containing Reduced Graphene Oxide and Graphene Nanoplatelets

  Publikacja

  • M. Strankowski
  • P. Korzeniewski
  • J. Strankowska
  • A. Anu
  • T. Sabu

  - Materials - Rok 2018

  Polyurethane/graphene nanocomposites were synthesized using commercial thermoplastic polyurethane (TPU, Apilon 52DE55), and two types of graphene derivatives: graphene nanoplatelets (GNP) and reduced graphene oxide (RGO). Fourier Transformation Infrared Spectroscopy Fourier Transformation Infrared Spectroscopy (FTIR) spectroscopy, TEM, and SEM microscopy and XRD techniques were used to chemically and structurally characterize GNP...

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• A note on the vertical distribution of momentum transport in water waves

  Publikacja

  • J. Kołodko
  • G. Gic-Grusza

  - OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES - Rok 2015

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• Two-dimensional vertical analysis of dam-break flow

  Publikacja

  • P. Zima

  - TASK Quarterly - Rok 2007

  W artykule przedstawiono matematyczne modelowanie przepływów ze swobodną powierzchnią w kanałach otwartych. Do symulacji przepływu użyto dwuwymiarowy pionowy model RANS. Wchodzące w skład modelu równania Naviera-Stokesa rozwiązano stosując algorytm SIMPLE dla metody różnic skończonych. Do śledzenia zmian swobodnego zwierciadła wody zastosowano metodę MAC. Analizie poddano szybkozmienny przepływ po poziomym, gładkim dnie wywołany...

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• Route vertical alignment design in the process of its regulation

  Publikacja

  • Z. Kędra

  - Rok 2008

  W monografii przedstawiona została metoda opracowania projektu niwelety toru kolejowego na podstawie pomierzonych nierówności pionowych oraz praktyczny przykład jej zastosowania w procesie utrzymaniu dróg szynowych, a w szczególności w projektowaniu robót związanych z regulacją osi toru. Wykonany w ten sposób profil istniejącej linii kolejowej jest podstawą do obliczenia wartości podnoszeń toru. Wartości te nanosi się w terenie...

• Spetiation of organic matter in Vertical Flow Constructed Wetlands

  Publikacja

  • A. Lang
  • H. Obarska-Pempkowiak

  - POLISH JOURNAL OF ENVIRONMENTAL STUDIES - Rok 2009

  The object of the research were VFCWs which are a component of biological treatment of two hybrid hydrophyte systems located in Wieszyno and Wiklino, close to Słupsk, Poland. The facilities that are subject to analyses are unified in terms of structure (filtration material, depth of the bed and time of operation), but they differ in organic matter load, amounting respectively to: 8.0 gCOD/m2day and 31.0 gCOD/m2day.The intensity...

• Modelling of Vertical Wall Influence on the Single Bubble Motion

  Publikacja

  • D. Mikielewicz
  • J. Wajs

  - STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING - Rok 2005

  W referacie pokazano rezultaty badań eksperymentalnych i modelowania matematycznego siły odpychającej, działającej na model pęcherzyka przepływający wzdłuż ściany pionowej. Zaobserwowano okresowy charakter siły oraz stwierdzono, że zależy ona od liczby Reynoldsa. Porównanie obliczonych i zmierzonych wartości siły wykazało satysfakcjonującą zgodność.

• Modelling of vertical wall influence on the single bubble motion.

  Publikacja

  • D. Mikielewicz
  • J. Wajs

  - Rok 2004

  W referacie zaprezentowano rezultaty badań eksperymentalnych i modelowania matematycznego siły odpychającej, działającej na model pęcherzyka przepływający wzdłuż ściany pionowej. Zaobserwowano okresowy charakter tej siły oraz stwierdzono, że zależy ona od liczby Reynoldsa. Porównanie obliczonych i zmierzonych wartości siły wykazało satysfakcjonującą zgodność.

• Vertical axis wind engines using Magnus effect.

  Publikacja

  • W. Włodarski

  - Rok 2004

  Zaprezentowano krótki zarys historii wykorzystania energii wiatru. Opisano efekt Magnusa oraz dotychczasowe próby wykorzystania go w budowie silników wiatrowych. Przedstawiono obliczenia, za pomocą, których oszacowano możliwe do osiągnięcia sprawności silników wiatrowych o osi pionowej wyposażonych w rotory Magnusa.

• Route vertical alignment design in the process of its regulation

  Publikacja

  • Z. Kędra

  - REPORTS ON GEODESY AND GEOINFORMATICS - Rok 2009

  Regulacja toru kolejowego ma za zadanie dostosowanie niewłaściwego lub też zdeformowanego położenia osi toru do położenia odpowiadającego parametrom technicznym wymaganym dla danej linii kolejowej. Projekt regulacji wykonywany jest na podstawie pomiaru geodezyjnego wysokości toków szynowych metodą punktów stałych, tzn. w oparciu o umieszczone na słupach wskaźniki regulacji osi toru, których wysokość jest znana. Wykonany w ten sposób...

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• Intelligent monitoring the vertical dynamics of wheeled inspection vehicles

  Publikacja

  • J. Kozłowski
  • Z. Kowalczuk

  - IFAC-PapersOnLine - Rok 2019

  The problem of intelligent monitoring of the vertical dynamics of wheeled inspection vehicles is addressed. With the independent MacPherson suspension system installed, the basic analysis focuses on the evaluation of the parameters of the so-called quarter car model. To identify a physically motivated continuous description, in practice, dedicated integral-horizontal filters are used. The obtained discrete model, which retains...

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• Investigation of the Aerodynamics of an Innovative Vertical-Axis Wind Turbine

  Publikacja

  • K. Tesch
  • K. Kludzinska
  • P. Doerffer

  - FLOW TURBULENCE AND COMBUSTION - Rok 2015

  The paper presents the results of an experimental investigation and a three dimensional numerical analysis of the transient aerodynamic phenomena occurring in the innovative modification of classic Savonius wind turbine. An attempt to explain the increased efficiency of the innovative design a comparison with the traditional solution is undertaken. A vorticity measure based on the integral of the velocity gradient tensor second...

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• The system for remote monitoring of a vertical axis wind farm

  Publikacja

  • G. A. Kostro
  • F. Kutt
  • M. Michna
  • R. Ryndzionek
  • Ł. Sienkiewicz

  - Rok 2019

  The article presents a system for remote monitoring of working parameters of a wind turbine with a vertical axis. The monitoring system was built using a Raspberry PI 3 microcomputer with the Raspbian operating system and a MicroDAQ E2000 measuring card. The developed system enables monitoring the power output of the generator, torque on the turbine shaft, turbine speed and wind speed. The values of the monitored parameters are...

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• Reduced Graphene Oxide Joins Graphene Oxide To Teach Undergraduate Students Core Chemistry and Nanotechnology Concepts

  Publikacja

  • I. Kondratowicz
  • M. Nadolska-Dawidowska
  • K. Sadowska

  - JOURNAL OF CHEMICAL EDUCATION - Rok 2018

  Novel carbon nanomaterials such as reduced graphene oxide (rGO) and graphene oxide (GO) can be easily incorporated into the undergraduate curriculum to discuss basic chemistry and nanotechnology concepts. This paper describes a laboratory experiment designed to study the differences between GO and rGO regarding their physico-chemical properties (e.g. color, hydrophobicity, type of functional groups, electrical conductivity etc.)....

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• Graphene-based materials for capacitive deionization

  Publikacja

  • P. Liu
  • T. Yan
  • L. Shi
  • H. Park
  • X. Chen
  • Z. Zhao
  • D. Zhang

  - Journal of Materials Chemistry A - Rok 2017

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• Graphene and Its Derivatives for Energy Storage

  Publikacja

  • M. Aleksandrzak
  • E. Mijowska

  - Rok 2015

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• Electronic Circuits for Graphene-Based Biosensor

  Publikacja

  • M. Raczyṅski
  • Ł. Przeniosło
  • M. Jaguszewski
  • E. Miguez
  • M. Jaskuła
  • D. Matias
  • A. Biedka
  • P. Makiewicz
  • M. Biegun
  • E. Mijowska... i 3 innych

  - Rok 2016

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• Graphene Production and Biomedical Applications: A Review

  Publikacja

  • K. Malisz
  • B. Świeczko-Żurek

  - Crystals - Rok 2023

  Graphene is a two-dimensional nanomaterial composed of carbon atoms with sp2 hybrid orbitals. Both graphene and graphene-based composite have gained broad interest among researchers because of their outstanding physiochemical, mechanical, and biological properties. Graphene production techniques are divided into top-down and bottom-up synthesis methods, of which chemical vapor deposition (CVD) is the most popular. The biomedical...

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• Graphene Oxide as Mine of Knowledge: Using Graphene Oxide To Teach Undergraduate Students Core Chemistry and Nanotechnology Concepts

  Publikacja

  • I. Kondratowicz
  • K. Sadowska

  - JOURNAL OF CHEMICAL EDUCATION - Rok 2017

  The aim of this laboratory experiment is to utilize graphene oxide (GO) material to introduce under-graduate students to many well-known concepts of general chemistry. GO is a new nanomaterial that has generated worldwide interest and can be easily produced in every well-equipped undergraduate chemical laboratory. An in-depth examination of GO synthesis, as well as a study of its structure and properties, allows students to familiarize...

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• Application of vertical flow cw for highly contaminated wastewater treatment

  Publikacja

  • H. Obarska-Pempkowiak
  • M. Gajewska
  • E. Wojciechowska

  - Rok 2008

  Basing on quantitative and qualitative characteristics of reject waters generated during digested sewage sludge dewatering on centrifuges in conventional WWTP (RWC) and municipal landfill leachate (LL), the pilot constructed wetlands for treatment of both types of highly contaminated wastewater were designed. In the paper the characteristics of the pilot plants and assumed treatment efficiencies are presented. According to the...

• Lexicalisation of vertical motion: A study of three satellite-framed languages

  Publikacja

  • J. Łozińska
  • B. Pietrewicz
  • B. Grobelna

  - Cognitive Studies | Études cognitives - Rok 2018

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• The numerical simulation of two-dimensional vertical incompressible viscous flow

  Publikacja

  • P. Zima

  - Rok 2005

  W artykule przedstawiono numeryczne symulacje płaskiego pionowego przepływu nieściśliwej cieczy lepkiej ze swobodną powierzchnią. Zastosowano model bazujący na rozwiązaniu równań Naviera-Stokesa metodą "ciśnień" (SIMPLE). Przy takim podejściu otrzymano dywergencję równań Naviera-Stokesa oraz równanie Poissona na ciśnienie. W rozwiązaniu zastosowano schemat Laxa-Wendroffa z przesuniętą siatką Eulera. Takie podejście zapewnia dokładność...

• Deformations of the steel schell of a vertical cylindrical tank caused by underpressure

  Publikacja

  • J. Ziółko
  • T. Mikulski
  • E. Supernak

  - STEEL CONSTRUCTION - DESIGN AND RESEARCH - Rok 2016

  Underpressure in a tank with a fixed roof may arise in the final stage of its construction as well as during its usage. This article presents stages of deformations of the tank shell and their development from the occurrence of the first deformation to either removal of the causes of underpressure or cracking of the steel shell.

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• The dynamic signature verification using population-based vertical partitioning

  Publikacja

  • M. Zalasiński
  • K. Cpałka
  • T. Niksa-Rynkiewicz

  - Rok 2020

  The dynamic signature is an attribute used in behavioral biometrics for verifying the identity of an individual. This attribute, apart from the shape of the signature, also contains information about the dynamics of the signing process described by the signals which tend to change over time. It is possible to process those signals in order to obtain descriptors of the signature characteristic of an individual user. One of the methods...

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• Experimental study of the effect of vertical acceleration component on the slope stability

  Publikacja

  • A. Korzec
  • R. Jankowski

  - Journal of Measurements in Engineering - Rok 2018

  The paper deals with the stability of earth dams subjected to seismic and paraseismic excitations occurring in the close distance to the dam. The Newmark’s stability approach, classified as a simplified dynamic method, has been extended for two directional dynamic loading case and the evolution of the friction coefficient. The paper is focused on the experimental verification of the proposed method for harmonic and cyclic excitations...

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• Accuracy Analysis of Determination the Vertical Displacements in Unstable Reference System

  Publikacja

  • D. Filipiak-Kowszyk
  • W. Kamiński
  • M. Przyborski

  - Rok 2015

  Measurements of horizontal and vertical displacements are carried out mostly based on reference points identified as fixed. In surveying practice there may be some situations in which there is not possible to perform the measurements with reference to stable points or the difficulties in identification of points’ stability may arise. Accuracy analysis based on the covariance matrices have a special role in this process. In presented...

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• Numerical modal analysis of a vertical rising steel water gate

  Publikacja

  • K. Brusewicz
  • R. Jankowski

  - Rok 2017

  Vertical rising steel water gates are very common not only in Poland and Germany but also in other countries of the world. Their popularity is mainly attributed to their simplicity of construction, which makes their production process cheaper and faster when compared to other solutions. The aim of this paper is to conduct a numerical modal analysis to examine the eigenvalues and eigenmodes of a vertical rising steel gate. Two cases...

• Buckling of simplified models of silo with corrugated walls and vertical stiffeners

  Publikacja

  • P. Iwicki
  • K. Rejowski
  • J. Tejchman

  - Rok 2018

  The paper deals with buckling of cylindrical silos composed of corrugated sheets and vertical stiffeners (columns). Comprehensive finite element analyses were carried out for a perfect silo by means of a linear buckling approach. Corrugated walls were simulated as an equivalent orthotropic shell and vertical thin-walled columns as beam elements. Calculations for perfect silos with different numbers of columns made it possible to...

• Facile synthesis and characterization of graphene and N-doped graphene by CVD method from liquid precursors for promising electrode materials

  Publikacja

  • M. T. Tourchi Moghadam
  • K. Cysewska

  - MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY (Materials Science and Engineering B-Advanced Functional Solid-State Materials) - Rok 2024

  In this study, high-quality and few-layered graphene was synthesized using the chemical vapor deposition (CVD) method from liquid sources. Two different liquid carbon sources, pyridine, and benzene, were used and deposited on nickel foam under heat conditions using a bubbler in a quartz tube. X-ray diffraction (XRD) and Raman analysis confirmed the crystalline properties of graphene and N-doped graphene, demonstrating the high...

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• Tribological Behaviour of Copper-Graphene Composite Materials

  Publikacja

  • M. Chmielewski
  • R. Michalczewski
  • W. Piekoszewski
  • M. Kalbarczyk

  - Key Engineering Materials - Rok 2016

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• Non-adiabatic superconductivity in the electron-doped graphene

  Publikacja

  • D. Szczeşńiak
  • E. Drzazga-Szczeşńiak

  - EPL-EUROPHYS LETT - Rok 2021

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• A review on Graphene/GNPs/GO modified asphalt

  Publikacja

  • J. He
  • W. Hu
  • R. Xiao
  • Y. Wang
  • P. Polaczyk
  • B. Huang

  - Construction and Building Materials - Rok 2022

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