Filters
total: 3276
filtered: 3083
displaying 1000 best results Help
Search results for: barkhausen%20effect
-
Effect of starch fillers on the dynamic mechanical properties of rubber biocomposite materials
PublicationIn the paper the results of dynamic mechanical study of the biocomposites containing one of two types of (potato or corn) strach used as fillers in different amount were discussed. The composites were obtained from rubbery mixture containing natural rubber (NR) as a main component. Thermomechanical analyses (by DMA) showed that the used quantity of strach fillers only slightly influence on the glass transition temperature of vulcanizates.
-
Dead-Time Effect Compensation Based on Additional Phase Current Measurements
PublicationThis paper proposes a new method of dead-time effect compensation. The proposed solution is based on additional phase current measurements realized by analog-to-digital converters. These measurements are carried out at the time instants specified by a pulsewidth-modulation (PWM) strategy. This makes it possible to estimate inverter currents at the commutation instants and, finally, to estimate the voltage error caused by dead time. This...
-
Effect of conventional cooking on changes in the contents of basic composition and glucosinolates in kale
PublicationBrassica vegetables have been strongly recommended as part of human diet because of its high content of bioactive sulphur compounds, eg glucosinolates. The nutrient and health promoting compounds in kale are significantly affected by traditional cooking. The study investigated changes in the levels of dry mass, ash, fat, total protein, dietary fibre as well as total and individual glucosinolates in the kale due to the traditional...
-
The effect of fishing basin construction on the behaviour of a footbrdge over the port channel
PublicationThe paper analyses possible causes of failure of the rotating footbridge over the Ustka port channel. In July, 2015, strange behaviour of this object was observed in the form of excessive vibrations of bridge platform suspension rods, with the accompanying acoustic effects. A preliminary geotechnical analysis has revealed that this destructive effect was caused by the nearby construction works, namely construction of a fishing...
-
The effect of tyre rubber grinding method on the rubber-asphalt binder properties
PublicationRubber products, especially those used in the automotive industry, are responsible for a significant amount of waste, mainly in the form of worn tyres. One way to recycle tyres is to use them as an asphalt binder modifier. The properties of rubber-asphalt binders vary greatly depending on the morphology of the ground tyre rubber (GTR) grains and the type of tyre to be recycled (car/truck). The paper presents the results of research...
-
Effect of Overloaded Vehicles on Whole Life Cycle Cost of Flexible Pavements
PublicationThe phenomenon of vehicle overloading—illegal exceeding of maximum legal weight of vehicles, is a serious problem both in developing and developed countries around the world. Overloaded vehicles occur less frequently in comparison to properly loaded vehicles but due to their greater potential to cause damage they significantly contribute to distress of pavement structure. As studies show, the number of overloaded vehicles increases...
-
Effect of vehicle motion stability after impact/crash on traffic safety
PublicationThe article presents the application of general stability theory to the study of road traffic stability immediately after an impact (crash, collision). It turns out that when modelling a collision, vehicles can be treated as colliding masses and dynamical systems can be assigned to this phenomenon.
-
The effect of macro polymer fibres length and content on the fibre reinforced concrete
PublicationThe paper presents studies of a ready-mix concrete containing polymer fibres of three different lengths: 24, 38 and 54 mm. The performed tests allowed to determine the effect of fibre volume fraction and length on the concrete strength. The basic parameters of concrete mixture (consistency, air content and bulk density) were identified. Fibre reinforced concrete belongs to a group of composite materials. The polymer fibres are...
-
Numerical investigation of the core eccentricity effect on wave propagation in embedded waveguide
PublicationThe paper presents results of theoretical and numerical investigation of guided wave propagation in two-layer bars with geometric imperfections in the form of eccentric location of steel core. Steel rod of diameter equal to 1 cm embedded in composite mortar-type cover with external diameter equal to 5 cm has been taken into consideration. Several different rods with variable size of eccentricity are analysed. Results for rods with...
-
The effect of laser on metal surfaces for multidisciplinary usage in material and thermal engineering
PublicationThe subject of heat transfer and cooling systems is still a matter of contention in many different fields of science and industry. Infrigidation is much more difficult than warming, and so, much more needed in more and more different devices, starting from massive industrial machinery and air conditioning in commercial buildings, up to micro and nano-surgery tools. In fact, the size of many cooling systems is still a problem. It...
-
Effect of coarse grain aggregate on strength parameters of two-stage concrete
Publication. Two-stage concrete (TSC) is a special type of concrete that the method of its construction and implementation is different from conventional one. In TSC, coarse aggregate particles are first placed in the formwork and voids between them are subsequently injected with a special cementations mixture. TSC has been successfully used in many applications, such as underwater construction, casting concrete sections congested with reinforcement...
-
Effect of Hydroxypropylation and Beta-Amylase Treatment on Complexation of Debranched Starch With Naringenin
PublicationNaringenin exhibits many health benefits but it has limited water solubility and consequently low bioavailability. The objective of this study is to investigate the effect of hydroxypropylation and enzymatic treatments on starch complexation with naringenin. Potato starch and Hylon VII are hydroxypropylated to two substitution degrees and then debranched or debranched/β‐amylase treated prior to complexing with naringenin. Both...
-
Effect of Acetylation and Beta‐Amylase Treatment on Complexation of Debranched Starch with Naringenin
PublicationStarch inclusion complexation has been shown to improve solubility of water insoluble molecules. Potato starch and Hylon VII are acetylated at two levels and then debranched alone or combined with β‐amylase hydrolysis, and its complexes with naringenin are prepared in aqueous conditions and characterized in this study. Both soluble and insoluble complexes are formed with the soluble complex present in the supernatant and the insoluble...
-
Effect of Semiconductor Element Substitution on the Electric Properties of Barium Titanate Ceramics
PublicationThe investigated ceramics were prepared by a solid-state reaction from simple oxides and carbonates with the use of a mixed oxide method (MOM). The morphology of BaTi0.96Si0.04O3 (BTSi04) ceramics was characterised by means of a scanning electron microscopy (SEM). It was found that Si+4 ion substitution supported the grain growth process in BT-based ceramics. The EDS results confirmed the high purity and expected quantitative composition...
-
The effect of road restraint systems on the level of road safety - Polish experience
PublicationRoadside accidents happen when a vehicle runs off the road. The majority of these accidents are very severe because leaving the road is usually followed by hitting a solid obstacle (tree, pole, support, culvert front wall, barrier). Roadsides are some of the most important issues of road safety. They have been studied for years to identify roadside hazards and the effectiveness of road safety measures such as restraint systems....
-
The effect of the late wood share in the annual ring growth on the cutting power
PublicationW pracy przedstawiono wpływ udziału drewna późnego w przyroście rocznym na zapotrzebowanie mocy skrawania na jedną piłę podczas przecinania drewna sosnowego na pilarce ramowej PRW15-M. Drewno sosnowe pochodziło z 4. Krain Geograficznych Polski. Otrzymane wyniki poddano analizie statystycznej, która wykazała, że dla większości Krain korelacja pomiędzy udziałem drewna późnego w przyroście rocznym i mocą skrawania była znacząca na...
-
Effect of Microplastics Pollution on Hydrogen Production from Biomass: A Comprehensive Review
PublicationHydrogen production from biomass and organic wastes is considered as a potential alternative energy source and is known as a clean and CO2-free fuel energy carrier. H2 is considered very promising among the other energy sources; therefore, the effective conversion of biomass and organic solid waste to this secondary energy source is urgently sought. As a result, it is of importance to assess the impact of the existence of microplastics...
-
Investigations of size effect in tensile fracture of concrete using a lattice model
PublicationArtykuł przedstawia symulacje efektu skali w betonie podczas rozciągania przy zastosowaniu nowego modelu siatkowego. Zbadano wpływ rozkładu i wielkości kruszywa oraz wpływ strefy kontaktu na efekt skali.
-
Meso‐scale analyses of size effect in brittle materials using DEM
PublicationThe paper describes numerical meso-scale results of a size effect on strength, brittleness and fracture in brittle materials like concrete. The discrete element method (DEM) was used to simulate the size effect during quasi-static splitting tension with the experimental-based meso-structure. The two-dimensional (2D) calculations were carried out on concrete cylindrical specimens with two diameters wherein two different failure...
-
Experimental investigations of size effect in reinforced concrete beams failing by shear
PublicationW artykule omówiono wyniki doświadczalne efektu skali w zbrojonych betonowych belkach niszczących się przez ścinanie. Doświadczenia wykonano dla belek o różnych wymiarach ze zbrojeniem stalowym i bazaltowym. Podczas doświadczeń pomierzono siłę oraz szerokości lokalizacji i rys. Wyniki porównano z modelem skali wg Bazanta.
-
Effect of bulk solid on strength of cylindrical corrugated silos during filling.
PublicationW artykule przedstawiono wyniki MES dla metalowych silosów z blachy falistej o kształcie cylindrycznym. Obliczenia wykonano podczas stanu napełnienia silosów z uwzględnieniem materiału sypkiego. Materiały sypki został opisany hipoplastycznym modelem konstytutywnym. W obliczeniach wzięto pod uwagę wstępne imperfekcje geometryczne. Wyniki porównano dla silosów pustych. Zaobserwowano pozytywny efekt obecności materiału sypkiego.
-
Effect of heterogeneity on shear zone formation during plane strain compression.
PublicationW artykule przedstawiono wyniki numerycznej analizy ściskania w płaskim stanie odkształcenia dla materiałów granulowanych. Obliczenia przeprowdzono z modelem hipoplastycznym rozszerzonym o obroty i długość charakterystyczną. Obliczenia wykonno dla różnych rodzajów imperfekcji w próbce piasku zagęszczonego i luźnego.
-
Mikrostruktura i właściwości magnetyczne stali dupleks poddanej obróbce cieplnej
PublicationPrzedstawiono wyniki wstępnych badań mających na celu ocenę przydatności metod badań magnetycznych do oceny zmian w strukturze stali dupleks. Badania przeprowadzono na seriach próbek wykonanych ze stali typu dupleks AVESTA 2205, wyżarzanych w temperaturach 500 - 900ºC w przedziale czasu od 6 min. do 100 godzin. Skład fazowy określano za pomocą mikroskopii optycznej z wykorzystaniem mikroskopu Leica. Badania magnetyczne polegały...
-
Kształtowanie konstrukcji wież ciśnień w zależności od typów i sposobów podparcia stalowych zbiorników na wodę
PublicationOmówiono zależności między rodzajem zbiornika na wodę a kształtem bryły wieży ciśnień. Analizowano zbiorniki z dnem płaskim, zwisającym, półkolistym, typu Intze, Barkhausenna i Klonne.
-
Kształtowanie konstrukcji wież ciśnień w zależności od rodzajów podparcia stalowych zbiorników na wodę
PublicationOmówiono zależności między rodzajem zbiornika na wodę a kształtem bryły wieży ciśnień. Analizowano zbiorniki z dnem płaskim, zwisającym, półkolistym, typu Intze, Barkhausenna i Klonne.
-
Complementary study with magnetic and acoustic techniques of A336 steel damage state due to creep
PublicationBadano możliwość detekcji w sposób nieniszczący zmian w mikrostrukturze stali A336 poddanej próbie pełzania. Testowano dwie magnetyczne techniki (klasyczny efekt Barkhausena i emisję magnetoakustyczną) oraz dwie nowe techniki ultradźwiękowe (pomiar współczynnika elasto-akustycznego oraz dwójłomność akustyczną). Wykazano, iż wyniki badań akustycznych są komplementarne do wyników badań magnetycznych.
-
The effect of random surface topography height on fretting in dry gross slip conditions
Publication -
The Effect of WC/C Coating on the Wear of Bevel Gears Used in Coal Mines
Publication -
Effect of Cobalt Addition on the Activity of Nanocrystalline Iron Catalysts in the Cracking of Methane Reaction
Publication -
The effect of manganese on the structural and surface properties of nanocrystalline cobalt catalyst for ammonia synthesis
Publication -
Antioxidant effect of Elamipretide on bull's sperm cells during freezing/thawing process
Publication -
A preliminary study on antifungal effect of TiO2-based paints in natural indoor light
Publication -
Effect of Synthesis Parameters of Graphene/Fe2O3 Nanocomposites on Their Structural and Electrical Conductivity Properties
Publication -
The effect of aluminium oxide on the reduction of cobalt oxide and thermostabillity of cobalt and cobalt oxide
Publication -
Effect of sodium acetate on citric acid production from glucose by Yarrowia lipolytica
PublicationZbadano wpływ octanu sodu na produkcję kwasu cytrynowego z glukozy w hodowli wgłębnej przez nie utylizującego octanu mutanta (oct-) Yarrowia lipolytica A-101.1.31. Octan będący ko-substratem glukozy w pożywce zwiększał produktywność i plon kwasu cytrynowego w ciągu pierwszych 24 godzin procesu. Największy pozytywny wpływ na biosyntezę kwasu cytrynowego przez Y. lipolytica A-101.1.31 miał dodatek 2g/L octanu sodu (przy zbadanych...
-
Effect of extracting time and temperature on yeild of gelatin from different fish offal
PublicationCelem pracy było określenie optymalnych warunków otrzymywania żelatyny z różnych rodzajów odpadów powstających podczas obróki wstępnej lub przetwarzania surowców rybnych. Wydajność ekstrakcji żelatyny w 45°C z surowych skór łososia i kręgosłupów wynosiła 71-75% oraz 86% ze skór łososia wędzonego. W przypadku skór z marynowanego i solonego śledzia przemianie do żelatyny ulegało w tych warunkach około 100% kolagenu. Optymalny czas...
-
Effect of structure modification with potassium on grains layer creation process and phase transitions
PublicationZbadano szkła germanianowo-ołowiowe i krzemianowo bizutowe. Wartwy metalicznych granul wytwarzano w nich poprzez redukcję powierzchni w atmosferze wodoru. Praca dotyczy wpływu potasu na tworzenie się warstwy granul oraz na procesy topnienia i krzepnięcia granul w trakcie obróbki termicznej.
-
The noise-induced harmful effect assessment based on the properties of the human hearing system
PublicationA new way of assessment of noise-induced harmful effects on human hearing system is presented in the paper. The method takes into consideration properties of the human hearing system. The pro-posed method determines the cumulative impact on hearing system produced by the excessive noise. Based on the predicted effects of the noise exposure, the new types of noise indicators were developed. The evaluation of these indicators was...
-
Foreign Trade Changes in Poland and Slovakia as an Effect of Europeanization before and after the Accession
Publication -
Effect of self-assembly on antimicrobial activity of double-chain short cationic lipopeptides
Publication -
Effect of Aging on the Lower Limb Kinematics in Karate Practitioners: Comparing Athletes and Their Senseis
Publication -
Effect of extraction method on the antioxidative activity of ground elder (Aegopodium podagraria L.)
Publication -
Assessment of Hepatoprotective Effect of Chokeberry Juice in Rats Treated Chronically with Carbon Tetrachloride
Publication -
The effect of electromagnetic field on reactive oxygen species production in human neutrophilsin vitro
Publication -
Effect of nanosilica on characteristics of carbonizates of phenol-formaldehyde resin – Fe(acac)3
Publication -
Effect of extraction method on the yield of furanocoumarins from fruits ofArchangelica of?cinalis Hoffm.
Publication -
Effect of biochar activation by different methods on toxicity of soil contaminated by industrial activity
Publication -
Effect of admixtures on fresh grout and two-srtage (pre-placed aggregate) concrete
PublicationPrzedstawiono rezultaty badań doświadczalnych przeprowadzonych dla betonu uzyskanego metodą dwuetapową. Główną przeszkodą szerokiego zastosowania metody betonowania dwuetapowego Polcrete była niska wydajność urządzenia wytwarzającego mikrozaprawę - ultramiksera (UM). Celem przeprowadzonych badań laboratoryjnych było dobranie odpowiednich dodatków i domieszek, które umożliwią wytworzenie mikrozaprawy o takich samych parametrach...
-
The effect of structural material on the properties of post-coagulation sludge for fish processing wastewater
PublicationPrzeprowadzono badania unieszkodliwiania osadów pokoagulacyjnych powstających w czasie oczyszczania ścieków z przetwórstwa rybnego. Osady pokoagulacyjne charakteryzują się wysokim stopniem uwodnienia oraz podatnością na zagniwanie. Do poprawy właściwości osadów wybrano metodę mieszania ich z materiałami strukturotwórczymi: kredą podwęglową, torfem, trocinami oraz bentonitem. W mieszaninach oznaczano zmiany zawartości suchej masy,...
-
The (de)biasing Effect of GAN-Based Augmentation Methods on Skin Lesion Images
Publication