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Search results for: MAGNETOELECTRIC%20EFFECT
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Effect of heterogeneity on formation of shear zones in granular bodies.
PublicationW artykule przedstawiono wyniki numerycznej analizy ściskania w płaskim stanie odkształcenia dla materiałów granulowanych. Obliczenia przeprowadzono z mikropolarnym modelem hipoplastycznym. Obliczenia wykonano dla różnych rodzajów imperfekcji w próbce piasku zagęszczonego i luźnego.
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Effect of a charactereristic length on the behavior of quasi-brittle materials.
PublicationW artykule omówiono efekty skali w materiałach kruchych spowodowanych wielkością próbek. Obliczenia wykonano stosując MES na bazie nielokalnego prawa sprężysto-plastycznego rozszerzonego o czynniki nielokalne. Analizę przeprowadzono dla próbek rozciaganych i zginanych.
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Michał Ryms dr hab. inż.
PeopleMichał Ryms, PhD, DSc, Eng. is the physicist, graduate of the Gdańsk University of Technology. PhD thesis defended at the Chemical Faculty. Since 2011 an employee at the Department of Energy Conversion and Storage, Chemical Faculty, Gdansk University of Technology, POLAND – now as an associate professor. His research interests includes: improvement of energy efficiency and possibilities of new application of phase change materials...
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Effect of the production method on the properties of RS3/RS4 type resistant starch. Part 2. Effect of a degree of substitution on the selected properties of acetylated retrograded starch
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Experimental research of the effect of face milling strategy on the flatness deviations
PublicationIn this paper the dependencies between face milling strategy of EN AW6082-T6 aluminum alloy samples, with difference thicknesses (6, 8, and 12 mm) and two cold rolling directions, and flatness deviations were presented. Three strategies of milling included different proportions of material removed from both sides of the plates. This approach allowed to control the proportions of residual surface stresses on both sides of the specimens,...
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Facet effect of TiO2 nanostructures from TiOF2 and their photocatalytic activity
PublicationIn this study, special attention is focused on the design of TiO2 morphology and microstructure in the two-step preparation procedure using TiOF2 as a precursor to study their photodegradation mineralization efficiency. Firstly, TiOF2 was synthesized by a simple solvothermal method using titanium(IV) tetrafluoride, which was further used as a precursor in preparation of anatase 2D nanosheets, octahedral, decahedral, and rectangular prisms...
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Numerical Study of Concrete Mesostructure Effect on Lamb Wave Propagation
PublicationThe article presents the results of the numerical investigation of Lamb wave propagation in concrete plates while taking into account the complex concrete mesostructure. Several concrete models with randomly distributed aggregates were generated with the use of the Monte Carlo method. The influence of aggregate ratio and particle size on dispersion curves representing Lamb wave modes was analyzed. The results obtained for heterogeneous...
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Experimental study of the effect of vertical acceleration component on the slope stability
PublicationThe 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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Experimental investigation into surface texture effect on journal bearings performance
PublicationThe aim of this study was to analyse the performance of journal bearings with specially created dimples on the sliding surface and operating under various conditions. The texture was created on the bearing surface that co-acted with the smooth journal; moreover, the variation of the textured surface of the journal mating with the smooth bearing was tested, and the results were compared to those obtained with the standard smooth...
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Effect of environmental temperature variations on protective properties of organic coatings
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Impedance analysis of Portevin-Le Chatelier effect on aluminium alloy
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Effect of Newly Created Water Reservoirs on Agricultural Landscape Stability
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Electromagnetic curtain effect and tunneling properties of multilayered periodic structures
PublicationArtykuł przedstawia analizę rozpraszania fali elektromagnetycznej na wielowarstwowych strukturach periodycznych. W analizowanych strukturach zaobserwowano efekt tunelowania fali oraz efekt przestrajania pasm zaporowych/przepustowych (efekt kurtyny elektromagnetycznej)
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Symmetry-controlled negative differential resistance effect in a triangular molecule
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Mechanisms of antimelanoma effect of oat β-glucan supported by electroporation
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The Effect of the Phenomenon of “Spectrum Leakage” on the Measurement of Power Quality Parameters
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Corporate governance and propensity to share information: The long-run effect
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The effect of cigarette smoking on the clinical course of inflammatory bowel disease
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Metrological aspects of the Tombolo effect investigation – Polish case study
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The effect of unfavourable process conditions on the water desalination by membrane distillation
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Effect of flow-rate on ethanol separation in membrane distillation process
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Effect of osmoprotectants on the survival of bacterial endophytes in lyophilized beet roots
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Substituent Effect in the First Excited Singlet State of Monosubstituted Benzenes
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Effect of biostimulants and storage on the content of macroelements in storage roots of carrot
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Effect of grain preservation on the carotenoid and tocopherol content of cereal grains
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Effect of whole amaranth flour on bread properties and nutritive value
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Effect of clonidine on growth hormone release in psychiatric patients and controls
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Comparison of effect of fungicides with fenpropidin and picoxystrobin on phosphatase activities in soil
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The Effect of Valley Location in Two-Process Surface Topography Analysis
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The Effect of Antihypertensive Drugs on NADH in Newly Diagnosed Primary Hypertension
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The Effect of Effective Microorganisms on the Quality of Potato Chips and French Fries
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The Effect of Adhesive Additives on Silica Gel Water Sorption Properties
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The effect of mangiferin on skin: Penetration, permeation and inhibition of ECM enzymes
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Scale effect in shaft friction from direct shear tests
PublicationPrzeanalizowano wartości maksymalne tarcia uzyskane w aparacie bezpośredniego ścinania w kontakcie konstrukcja-grunt dla piasków kwarcowych i węglanowych oraz gładkiego i szorstkiego kontaktu. Badania przeprowadzono przy regulowanej sztywności normalnej kontaktu, przy różnej składowej normalnej naprężenia w kontakcie i różnym zagęszczeniu gruntu. Określono efekt skali jako stosunek wartości tarcia mobilizowanego na modelu do tarcia...
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Impedance analysis of Portevin-Le Chatelier effect on aluminium alloy
PublicationW niniejszej pracy przeprowadzono badania elektrochemiczne powierzchniowego efektu PLC, związanego z nierównomiernym procesem płynięcia plastycznego stopów aluminium zawierających magnez. Występujący efekt PLC w postaci serration wywołuje niehomogeniczny proces zmian zewnętrznej powierzchni rozciąganej próbki. Wykonano badania metodą Dynamicznej Spektroskopii Impedancyjnej w warunkach dynamicznych prowadzenia procesu rozciągania....
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The effect of the power transmission of the spindle on the position of the circular saw teeth
PublicationNa dokładność przecinania ma decydujący wpływ położenie ostrzy piły tarczowej. W pracy analizowano przyczyny i błędy połozenia ostrzy piły w stosunku do przedmiotu obrabianego spowodowane odkształceniem wrzeciona wywołanym przez siły skrawania i siły pochodzące od napędu.
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Mode interaction in few-mode optical fibres with Kerr effect
PublicationUogólnioną metodę rzutowania do ortogonalnej bazy funkcji poprzecznej współrzędnej Bessela stosuje się do wyprowadzania układów równań nieliniowych Schrodingera. Teoria jest ważna dla paczek falowych w światłowodach i kilku modelach.
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Pr-doped TiO2: The effect of metal content on photocatalytic activity
PublicationThe Pr-TiO2 nanoparticles were prepared by using the sol-gel method. As-prepared samples were characterized by BET measurements, X-ray powder diffraction analysis (XRD) and UV-Vis spectra. Visible and ultraviolet light photocatalytic activity of the sample was studied by photodegradation of phenol while considering the influence of the dopant concentration. TiO2 doped with 0.25 mol% of praseodymium showed the highest photocatalytic...
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Effect of initial imperfection on buckling of thin-walled I columns
PublicationEffects of initial geometrical imperfections on critical buckling loads of thin-walled I columns are investigated. Torsional and flexural buckling are taken into account. The column behaviour is described in accord to the theory of thin-walled beams with nondeformable cross-section. Some numerical examples and conclusions related to effects of imperfections on properties of the critical loads are presented.
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Running performance of an aerodynamic journal bearing with squeeze film effect
PublicationResults of theoretical and experimental studies concerning the performance of an aerodynamic journal bearing of which running is assisted by squeeze film ultrasonic levitation (SFUL) are presented in this paper. The SFUL mechanism not only can separate journal from the bearing at the start and stop phases of operation but also can significantly contribute to the dynamic stability of the bearing when it runs at speed. Computer calculations...
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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.
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Effect of microstructure on impact toughness of duplex and superduplex stainless steels
PublicationW artykule przedstawiono wpływ wyżarzania stali dupleks 2205 i superdupleks 2507 na przemiany strukturalne oraz udarność. Obróbkę cieplną przeprowadzono w zakresie temperatur 500-900C i w czasie 6 - 600 min. Określono i porównano podatność obu stali do zmian właściwości po wyżarzaniu
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Effect of adhesive compliance in the assessment of soft adhesives with the wedge test
PublicationWedge tests are usually analysed assuming that the free, unbonded members may be treated as encastré cantilever beams. However, if the adhesive layer is sufficiently flexible (e.g., due to low elastic modulus), then significant strain in the bonded region may occur and lead to modification of the behaviour outside this region. Using in conjunction a sensitive strain gauge method on asymmetric wedge tests and a mathematical analysis...
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Effect of oxygenation time on signal of a sensor based on ionic liquids
PublicationThe paper presents an oxygen sensor based on ionic liquids and solid electrodes. The following ionic liquids have been employed: [BMIM][BF4], [HMIM][Cl], [BMIM][N(CN2)]. Minimum time of the sensor exposure to analyte, after which the signal (current intensity) was stable, has been evaluated. An impact of volumetric flow rate of analyte on the sensor exposure time and signal has been determined. A product of permeability coefficient...
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The Effect of Welding Conditions on Diffusible Hydrogen Content in Deposited Metal
PublicationThe article presents the results of a literature survey and preliminary tests which set out effects of welding conditions on the amount of diffusible hydrogen in deposited metal. Experiments were conducted by using rutile coated electrodes which generate high contents of diffusible hydrogen in deposited metal. The amount of diffusible hydrogen was determined by a glycerin test.Eleven factors were considered: the electrode angle,...
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Energy deposition on the inner surface of a Hall Effect thruster for satellite
PublicationHET - Hall Effect Thruster, to silnik powszechnie wykorzystywany w kosmonautyce do pozycjonowania satelitów. Medium dostarczającym ciąg silnikowi jest zjonizowany gaz. Praca przedstawia wyniki trzech symulacji komputerowych: 1. Modelowanie sondy Langmuira zanurzonej w plazmie ksenonowej o warunkach zbliżonych do tych panujących w silniku HET. Symulacje wykonano metodą metodą Particle-in-Cell Monte Carlo. Celem była analiza oddziaływania...
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The Doppler effect in a bistatic system for determining the position of moving targets
PublicationThe article presents the theoretical analysis and the results of numerical calculations of the Doppler effect it occurs in a system designed to determine the position and speed of a moving target. The transmitter is the source of the signal and it emits a sinusoidal, acoustic and continuous wave. Signal reflected off a moving target is received by four hydrophones. Based on the signals, four Doppler shifts are determined and inserted...
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The effect of surfactants mixtures composition on wetting of different solid materials
PublicationThe wetting properties of surfactants mixtures were investigated. Three types of compounds were used: nonionic gemini α, α'-[2,4,7,9-tetramethyl-5-decyne-4,7-diyl]bis[ω-hydroxyl-olioxyethylene] (S-10), anionic sodium dodecyl sulphates (SDS) and cationic dodecyl trimethyl ammonium bromide (DTAB). The materials used in wetting experiments were steel and methyl polymethacrylate. These materials differ...
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ASSESSMENT OF TOXIC EFFECT AND ENDOCRINE POTENTIAL OF FOOD PACKAGES EXTRACTS
PublicationIn the scientific literature related to the widely understood issue of packaging materials designed to have contact with food there is much information on raw materials used for their production, their physiochemical properties, types and parameters. There is also a great number of publications on the management and disposal of used packaging. Unfortunately, not much attention is given to the matters concerning migration of toxic...
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The effect of tire aging on acoustic performance of CPX reference tires
PublicationReduction of tire/road noise is one of the biggest environmental challenges of road traffic. To reduce that noise it is necessary to perform acoustic measurements on the base of wellproven standard procedures. One method of measurements that is in common use, namely the Close Proximity Method (CPX), is described in standard ISO-DIS 11819-2. As this method is used to classify road surfaces regarding their influence on vehicle noise,...