Wyniki wyszukiwania dla: grafion

• Wpływ mikrosfer-frakcji odpadów paleniskowych na mikrostrukturę i wybrane właściwości uzytkowe

  Publikacja

  • E. Haustein
  • B. Quant

  - Materiały Budowlane - Rok 2014

  In this study, the microspheres samples were collected from national power station „Dolna Odra”. In this study, the following materials were used: Portland cement class 32,5R and aggregates of 2-8 and 8-16 fractions and natural sand with a maximum grain size of 2 mm and water. Concrete mixtures were made with microspheres additions of 15%, 25% and 40%. A constant water to binder ratio (w/b) of 0,52 was used throughout the investigation....

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• Application of the expanded clay aggregate in form of granular materials for water treatment

  Publikacja

  • J. Drewnowski
  • G. Łagód

  - Rok 2017

  The paper aimed to evaluate the efficiency of Filtralite MonoMulti compared to the conventional dual-media filter beds comprising silica sand layer covered with anthracite coal. Filtralite media are composed of processed (expanded), highly porous clay products characterized by relatively rough grain surfaces. In order to compare these different media filters in a reliable way, the pilot filter columns operated in parallel, under...

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• Corrosion and Cavitation Resistances of Low Alloy Steel After Frictional-Mechanical Treatment

  Publikacja

  • D. Kocańda
  • W. Jurczak
  • E. Łunarska
  • M. Szociński

  - Mehanika mašin, mehanizmov i materialov - Rok 2017

  Paper presents the results of the studies of wear, corrosion and cavitation resistances of the S355J2 low alloy medium carbon steel subjected to surface modification by friction-mechanical treatment, as tested in sea water simulated solution. To evaluate the effect of the surface treatment, the comparative studies of the corrosive properties of the steel before and after treatment have been considered. The treatment due to a severe...

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• By-Products from Food Industry as a Promising Alternative for the Conventional Fillers for Wood–Polymer Composites

  Publikacja

  • A. Hejna
  • J. Korol
  • P. Kosmela
  • A. Kuzmin
  • A. Piasecki
  • A. Kulawik
  • B. Chmielnicki

  - Polymers - Rok 2021

  The present paper describes the application of two types of food-industry by-products, brewers’ spent grain (BSG), and coffee silverskin (ŁK) as promising alternatives for the conventional beech wood flour (WF) for wood–polymer composites. The main goal was to investigate the impact of partial and complete WF substitution by BSG and ŁK on the processing, structure, physicochemical, mechanical, and thermal properties of resulting...

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• Structural and electrochemical heterogeneities of boron-doped diamond surfaces

  Publikacja

  • R. Bogdanowicz
  • J. Ryl

  - Current Opinion in Electrochemistry - Rok 2022

  This brief review is focussed on the recent progress in studies of the heterogeneous electrochemical behaviour of various boron-doped materials extending from zero-dimensional particles through polycrystalline or nanostructured three-dimensional surfaces. A boron-doped diamond reveals large heterogeneities induced by numerous factors, inter alia multi-faceted crystallinity, inhomogeneous boron concentration, sp2/sp3-carbon ratio,...

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• Influence of Gd deposition on the oxidation behavior and electrical properties of a layered system consisting of Crofer 22 APU and MnCo2O4 spinel

  Publikacja

  • T. Brylewski
  • S. Molin
  • M. Marczyński
  • Ł. Mazur
  • K. Domaradzki
  • O. Kryshtal
  • A. Gil

  - INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Rok 2021

  In the study, the surface of the Crofer 22APU ferritic steel was modified with gadolinium oxide nanoparticles and a protective-conducting layer consisting of the MnCo2O4 spinel. This system was studied in the context of application in IT-SOFC interconnects. Four types of samples were studied: unmodified steel, steel coated with a manganese-cobalt spinel layer, steel modified with gadolinium oxide nanoparticles, and a system consisting...

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• New Complementary Resonator for Permittivity- and Thickness-Based Dielectric Characterization

  Publikacja

  • T. Haq Ul
  • S. Kozieł

  - SENSORS - Rok 2023

  The design of high-performance complementary meta-resonators for microwave sensors featur-ing high sensitivity and consistent evaluation of dielectric materials is challenging. This paper presents the design and implementation of a novel complementary resonator with high sensi-tivity for dielectric substrate characterization based on permittivity and thickness. A comple-mentary crossed arrow resonator (CCAR) is proposed and integrated...

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• Rheology of potato starch chemically modified with microwave-assisted reactions

  Publikacja

  • H. Staroszczyk
  • M. Fiedorowicz
  • J. Opalińska-Piskorz
  • R. Tylingo

  - LWT-FOOD SCIENCE AND TECHNOLOGY - Rok 2013

  Native potato starch was sulfated, selenated, borated, silicated and zincatated by means of microwave-assisted reactions with varying doses of relevant reagents. Resulting products were characterized involving rheological behavior of pastes, their weight-average molecular weight (Mw), and radius of gyration (Rg). Most of the pastes showed shear-thinning behavior, with the flow behavior index (n) below unity. The pastes of starch...

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• Komputerowe modelowanie geometryczne w kształceniu architektonicznym I stopnia

  Publikacja

  • M. Rogińska-Niesłuchowska

  - Rok 2012

  Dynamiczny rozwój technik cyfrowych i wynikające stąd postępujące zmiany w oprogramowaniu powodują wzrost znaczenia znajomości komputerowych metod wspomagania projektowania w warsztacie zawodowym architekta. W trosce o zapewnienie studentom możliwości rozwijania kompetencji w tym zakresie, konieczna jest stała analiza oraz potrzeba rozszerzania i wzbogacania treści programowych w ramach istniejąch programów kształcenia. Tematyka...

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• Badania operacyjne z elementami teorii grafów w transporcie

  Kursy Online

  • R. Szłapczyński

• Designing optimal and safe control strategies for time-varying dynamical systems

  Publikacja

  • Z. Kowalczuk
  • K. Oliński

  - Rok 2009

  Publikacja opisuje metodę projektowania optymalnej trajektorii punktu pracy w czasoprzestrzeni stanów przy wykorzystaniu algorytmów optymalizacji grafowej. Zakłada się deterministyczny charakter zmian dynamiki rozpatrywanego procesu. Przestrzeń robocza, będąca ograniczonym podzbiorem czasoprzestrzeni stanów, jest dzielona na zbiór segmentów, którym przypisywane są wielkości reprezentujące właściwości dynamiki własnej w obrębie...

• Seeding enhancement for microcrystaline diamond layers growth on non-diamond substrates

  Publikacja

  • Ł. Gołuński
  • M. Sobaszek
  • M. Gardas

  - Rok 2012

  The present paper gives an overview on the possible methods of seeding substrates for diamond layers growth. Diamond in reason of his properties is very desirable material in microelectronic, biomedical and waste treatment sensors. Microcrystalline diamond for these applications must be grown on silicon substrate in microwave plasma assisted chemical vapor deposition (MPACVD). To grow diamond on non-diamond surface pre-growth...

• Technologie multimedialne - 2023

  Kursy Online

  • P. Odya
  • J. Kotus
  • S. Zaporowski
  • P. Sokołowski
  • P. Szczuko
  • W. Ludwikowska
  • G. Szwoch
  • A. Harasimiuk
  • B. Mróz

  Kurs ma za zadanie zapoznać studentów z podstawami szeroko pojętych technologii multimedialnych, z którymi spotykają się praktycznie na każdym kroku. Studenci poznają perceptualne podstawami kompresji dźwięku oraz obrazu ruchomego i nieruchomego. Uczą się tworzyć i zarządzać stronami www. Wśród poruszanych zagadnień znajdują się także interfejsy multimodalne oraz podstawy tworzenia grafiki 2D i 3D. Poruszane są również elementy...

• Technologie multimedialne - 2022

  Kursy Online

  • P. Odya
  • J. Kotus
  • S. Zaporowski
  • P. Sokołowski
  • P. Szczuko
  • W. Ludwikowska
  • G. Szwoch
  • K. Marciniuk
  • B. Mróz
  • M. Lech
  • P. Spaleniak

  Kurs ma za zadanie zapoznać studentów z podstawami szeroko pojętych technologii multimedialnych, z którymi spotykają się praktycznie na każdym kroku. Studenci poznają perceptualne podstawami kompresji dźwięku oraz obrazu ruchomego i nieruchomego. Uczą się tworzyć i zarządzać stronami www. Wśród poruszanych zagadnień znajdują się także interfejsy multimodalne oraz podstawy tworzenia grafiki 2D i 3D. Poruszane są również elementy...

• Technologie multimedialne - 2024

  Kursy Online

  • P. Odya
  • J. Kotus
  • S. Zaporowski
  • P. Sokołowski
  • P. Szczuko
  • W. Ludwikowska
  • G. Szwoch
  • A. Harasimiuk
  • K. Marciniuk
  • B. Mróz

  Kurs ma za zadanie zapoznać studentów z podstawami szeroko pojętych technologii multimedialnych, z którymi spotykają się praktycznie na każdym kroku. Studenci poznają perceptualne podstawami kompresji dźwięku oraz obrazu ruchomego i nieruchomego. Uczą się tworzyć i zarządzać stronami www. Wśród poruszanych zagadnień znajdują się także interfejsy multimodalne oraz podstawy tworzenia grafiki 2D i 3D. Poruszane są również elementy...

• Ellipsometric investigation of nitrogen doped diamond thin films grown in microwave CH4/H2/N2 plasma enhanced chemical vapor deposition

  Publikacja

  • M. Ficek
  • K. J. Sankaran
  • J. Ryl
  • R. Bogdanowicz
  • I. Lin
  • K. Haenen
  • K. Darowicki

  - APPLIED PHYSICS LETTERS - Rok 2016

  The influence of N2 concentration (1%–8%) in CH4/H2/N2 plasma on structure and optical properties of nitrogen doped diamond (NDD) films was investigated. Thickness, roughness, and optical properties of the NDD films in the VIS–NIR range were investigated on the silicon substrates using spectroscopic ellipsometry. The samples exhibited relatively high refractive index (2.6 6 0.25 at 550 nm) and extinction coefficient (0.05 6 0.02...

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• SAWING PROCESS AS A NEW ALTERNATIVE WAY OF DETERMINING SOME WOOD PROPERTIES

  Publikacja

  • K. Orłowski
  • T. Ochrymiuk
  • J. Sandak
  • A. Sandak
  • M. Riggio

  - Rok 2015

  Cutting forces (power) could be considered from a point of view of modern fracture mechanics. The developed cutting model, derived from fracture mechanics, includes work of separation (fracture toughness) in addition to plasticity and friction, and also dullness of the cutting edge described by the cutting edge radius. Moreover, forecasting of the shear plane angle for the cutting models, broaden possibilities of energetic effects...

• Nickel-nanodiamond coatings electrodeposited from tartrate electrolyte at ambient temperature

  Publikacja

  • I. Makarova
  • I. Dobryden
  • D. Kharitonov
  • A. Kasach
  • J. Ryl
  • E. Repo
  • E. Vuorinen

  - SURFACE & COATINGS TECHNOLOGY - Rok 2019

  In this study, nanocrystalline Ni and Ni-diamond coatings were obtained by electrodeposition from tartrate electrolyte at ambient temperature aiming at improving corrosion and wear properties of the material. The created surfaces were investigated with regard to microhardness, adhesion, wear- and corrosion-resistance. The various methods such as atomic force microscopy, scanning electron microscopy, electrochemical impedance spectroscopy...

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• Properties of LiMnBO3 glasses and nanostructured glass-ceramics

  Publikacja

  • P. Michalski
  • A. Gołębiewska
  • J. Trebosc
  • O. Lafon
  • T. Pietrzak
  • J. Ryl
  • J. Nowiński
  • M. Wasiucionek
  • J. Garbarczyk

  - SOLID STATE IONICS - Rok 2019

  Polycrystalline LiMnBO3 is a promising cathode material for Li-ion batteries. In this work, we investigated the thermal, structural and electrical properties of glassy and nanocrystallized materials having the same chemical composition. The original glass was obtained via a standard melt-quenching method. SEM and 7Li solid-state NMR indicate that it contains a mixture of two distinct glassy phases. The results suggest that the...

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• An algorithm to generate high dense packing of particles with various shapes

  Publikacja

  • K. Miśkiewicz
  • R. Banasiak
  • M. Niedostatkiewicz
  • K. Grudzień
  • L. Babout

  - MATEC Web of Conferences - Rok 2018

  Discrete Element Method (DEM) is one of available numerical methods to compute movement of particles in large scale simulations. The method has been frequently applied to simulate the cases of grain or bulk material as the major research issue. The paper describes a new method of generating high dense packing with mixed material of two different shape used in DEM simulation. The initial packing is an important parameter to control,...

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• Ultrafast high-temperature sintering (UHS) of cerium oxide-based compound

  Publikacja

  • A. Kabir
  • B. Lemieszek
  • J. Karczewski
  • E. De Bona
  • M. Varenik
  • S. Molin
  • M. Biesuz

  - Open Ceramics - Rok 2024

  Ultrafast high-temperature sintering (UHS) is an innovative sintering technique that can densify ceramics in a few seconds, dramatically reducing the carbon footprint and firing costs. In this work, the feasibility of applying UHS in Gd-doped ceria (GDC) and GDC-Er-stabilized bismuth oxide (ESB) composite powders was investigated. At high UHS currents (22-24 A), a fully dense GDC sample with a large grain size was obtained. Nonetheless,...

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• Shear band evolution phenomena in direct shear test modelled with DEM.

  Publikacja

  • M. Nitka
  • A. Grabowski

  - POWDER TECHNOLOGY - Rok 2021

  A direct shear test is widely used in the geotechnical engineering field. It is an easy and quick test to measure the shear properties of soil. This test often replaces more expensive and difficult tri-axial shear test. Despite that the direct shear test is known and used for a long time, it is still not well investigated at the grain scale. This paper deals with the micro behaviour of the cohesionless sand inside the direct shear...

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• Gigantic electro-chemo-mechanical properties of nanostructured praseodymium doped ceria

  Publikacja

  • V. B. Tinti
  • A. Kabir
  • J. K. Han
  • S. Molin
  • V. Esposito

  - NANOSCALE - Rok 2021

  Some oxygen defective fluorites are non-Newnham electrostrictors, i.e., the electromechanical response does not depend on their dielectric properties. Here, we show gigantic electrostriction in nanocrystalline 25 mol% praseodymium doped ceria (PCO) bulk ceramics. The material was fabricated with a fieldassisted spark plasma sintering (SPS) process from high-purity nanoscale PCO powders (<20 nm). The SPS process consolidates the...

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• Effectiveness of a dual surface modification of metallic interconnects for application in energy conversion devices

  Publikacja

  • Ł. Mazur
  • J. Ignaczak
  • M. Bik
  • S. Molin
  • M. Sitarz
  • A. Gil
  • T. Brylewski

  - INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Rok 2022

  A dual surface modification of an SOFC metallic interconnect with a Gd2O3 layer and an MnCo2O4 coating was evaluated. The tested samples were oxidized for 7000 h in air at 1073 K. Oxidation products were characterized using XRD, SEM-EDS, and confocal Raman imaging, and ASR was measured. The effect of gadolinium segregation at grain boundaries in Cr2O3 was evaluated using S/TEM-EDS. Area specific-resistance was measured and fuel...

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• Proton-Electron Hole Interactions in Sr(Ti,Fe)O3−δ Mixed-Conducting Perovskites

  Publikacja

  • T. Miruszewski
  • W. Skubida
  • P. Winiarz
  • K. Dzierzgowski
  • A. D. Mielewczyk-Gryń
  • S. L. Wachowski
  • M. Gazda

  - JOURNAL OF THE ELECTROCHEMICAL SOCIETY - Rok 2022

  Oxides in which total electrical conductivity is determined by the partial conductivities of three types of charge carriers i.e. holes/ electrons, oxygen ions, and protons are key components of well-functioning proton ceramic fuel cells. Apart from electrochemical properties also easily modified microstructure is an important feature of the electrodes. In the paper, a group of SrTi1−xFexO3−δ (STF, x = 0.2–0.8) perovskites prepared...

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• Assessment of Corrosive Behaviour and Microstructure Characterization of Hybrid Friction Stir Welded Martensitic Stainless Steel

  Publikacja

  • D. G. Mohan
  • S. Gopi
  • J. Tomków
  • S. Memon

  - Advances in Materials Science - Rok 2021

  This study examined the effect of induction heating on the microstructure and corrosion characteristics of hybrid friction stir welded AISI 410 stainless steel. Five joints have been produced with different friction stir welding parameters like welding speed, spindle speed, plunge depth, and induction power. Their microstructures were evaluated using a scanning electron microscope, and chemical composition was examined using...

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• Micro-modelling of shear localization during quasi-static confined granular flow in silos using DEM

  Publikacja

  • A. Grabowski
  • M. Nitka
  • J. Tejchman

  - COMPUTERS AND GEOTECHNICS - Rok 2021

  The paper deals with the quasi-static confined flow of cohesionless sand in a plane strain model silo with parallel walls and a slowly movable bottom. Numerical modelling was carried out by the discrete element method (DEM) using spheres with contact moments to approximately capture a non-uniform shape of sand particles. Different initial void ratios of sand and silo wall roughness grades were employed. Regular triangular grooves...

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• EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF CONCRETE BEHAVIOUR AT MESO-LEVEL DURING QUASI-STATIC SPLITTING TENSION

  Publikacja

  • J. Suchorzewski
  • J. Tejchman

  - Rok 2017

  The paper describes experimental and numerical results of quasi-static splitting tensile tests on concrete specimens at meso-scale level. The loading strip was made of plywood or steel. Fracture in concrete was detected at the aggregate level by means of three non-destructive methods: 3D x-ray micro-computed tomography, 2D scanning electron microscope and manual 2D digital microscope. The discrete element method was used to directly...

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• Grafika Inżynierska (C), Oce, sem. 1, zimowy 22/23 (PG_00055813)

  Kursy Online

  • E. Wojtowicz

• Grafika Inżynierska, W, P, MECHATRONIKA, sem01, zimowy, 2022/2023 (PG_00055362)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika inżynierska oraz podstawy rysunku technicznego AutoCAD - kurs listopad 2022

  Kursy Online

  • W. Tisler

• Grafika Inżynierska (C), TiL, sem. 2, letni 22/23, (PG_00055799)

  Kursy Online

  • W. Leśniewski
  • E. Wojtowicz
  • M. Kunicka

• Grafika Inżynierska, W, P, ZIP, sem01, zimowy, 2022/2023 (PG_00055039)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika Inżynierska, W, P, MiBM, sem01, zimowy, 2022/2023 (PG_00055372)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika Inżynierska (C), PiBJ, sem. 1, zimowy 22/23 (PG_00055787)

  Kursy Online

  • E. Wojtowicz

• Grafika Inżynierska, W, P, IMM, sem01, zimowy, 2022/2023 (PG_00055730)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika Inżynierska (W), PiBJ, sem. 1, zimowy 22/23 (PG_00055787)

  Kursy Online

  • J. Kowalski
  • W. Leśniewski
  • A. Maczyszyn

• Grafika Inżynierska (W), TiL, sem. 2, letni 22/23, (PG_00055799)

  Kursy Online

  • J. Kowalski
  • W. Leśniewski
  • A. Maczyszyn

• Grafika Inżynierska, W, P, Energetyka, sem01, zimowy, 2022/2023 (PG_00055863)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika Inżynierska, P, Mechatronika, sem 01, zimowy 2021/2022 (PG_00055362)

  Kursy Online

  • K. Zasińska
  • K. Mazur
  • S. Grelik-Urbanowski
  • W. Karaszewski
  • G. Rotta

• Grafika inżynierska (P), TiL (PG_00060629), sem. 1, zimowy 23/24

  Kursy Online

  • W. Leśniewski
  • E. Wojtowicz
  • D. Piątek

• Grafika Inżynierska, W, P, IMM, sem01, zimowy, 2024/2025 (PG_00064107)

  Kursy Online

  • W. Karaszewski

• Grafika Inżynierska, W, P, ZIP, sem01, zimowy, 2024/2025 (PG_00055039)

  Kursy Online

  • W. Karaszewski

• Grafika Inżynierska, W, P, ZiIP, sem01, zimowy, 2023/2024 (PG_00055039)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika inżynierska (P), OiKM (PG_00060525), sem. 1, zimowy 23/24

  Kursy Online

  • W. Leśniewski
  • E. Wojtowicz
  • D. Piątek

• Grafika inżynierska (P), OiKM (PG_00060525), sem. 1, zimowy 24/25

  Kursy Online

  • E. Wojtowicz

• Grafika Inżynierska, W, P, ENERGETYKA, sem01, zimowy, 2023/2024 (PG_00055863)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika Inżynierska, W, P, MECHATRONIKA, sem01, zimowy, 2023/2024 (PG_00055362)

  Kursy Online

  • K. Mazur
  • W. Karaszewski

• Grafika inżynierska (P), PiBJ (PG_00060506), sem. 1, zimowy 24/25

  Kursy Online

  • E. Wojtowicz

• Grafika Inżynierska, W, P, MiBM, sem01, zimowy, 2024/2025 (PG_00055372)

  Kursy Online

  • W. Karaszewski