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Wyniki wyszukiwania dla: CEMENT MILL
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Analysis of longitudinal wave propagation in a cracked rod by the spectral element method
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Recent developments in the synthesis and applications of graphene-family materials functionalized with cyclodextrins
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A comprehensive review on environmental transformation of selenium: recent advances and research perspectives
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Recent advances in the pathophysiology of arterial hypertension - potential implications for clinical practice
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Recent weight gain in patients with newly diagnosed obstructive sleep apnea
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Long-Term Preservation Services as a Key Element of the Digital Libraries Infrastructure
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Use of Neural Networks in Diagnostics of Rolling-Element Bearing of the Induction Motor
PublikacjaBearing defect is statistically the most frequent cause of an induction motor fault. The research described in the paper utilized the phenomenon of the current change in the induction motor with bearing defect. Methods based on the analysis of the supplying current are particularly useful when it is impossible to install diagnostic devices directly on the motor. The presented method of rolling-element bearing diagnostics used indirect...
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A parametric study on water-entry of a twin wedge by boundary element method
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Recent developments in the determination of residual solvents in pharmaceutical products by microextraction methods
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Przebudowa przekrycia jako element zmiany sposobu użytkowania obiektu zabytkowego
PublikacjaW artykuleprzedstawiono opis zabytkowego budynku wozoni usytuowanej na terenie realizowanego osiedla mieszkaniowego, którego głowna część substancji mieszkaniowej stanowią apartamenty w loftach. W pracy omówiono stan techniczny przekrycia oraz przedstawiono propozycje modernizacji budynku z uwzględniniem jego zabytkowego charakteru
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A higher order shell element for wave propagation in isotropic shell structures
PublikacjaThe presents the new multi mode higher order shell element for wave propagation problems in shell structures.
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KONSULTACJE SPOŁECZNEJAKO ELEMENT REALIZACJI DUŻYCH PROJEKTÓW INFRASTRUKTURALNYCH – STUDIA PRZYPADKÓW
PublikacjaW opracowaniu przedstawiono aspekt przeprowadzania konsultacji społecznych w realizacji projektów infrastrukturalnych. Podjęto próbę odpowiedzi na pytania: czy faktycznie istnieje potrzeba, czy też konieczność prowadzenia konsultacji społecznych w realizacji projektów infrastrukturalnych, jak szeroko prowadzić konsultacje, czy jest wskazane i efektywne ponoszenie nakładów finansowych na konsultacje w szerokim gronie interesariuszy...
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Byłe porty lotnicze jako element dziedzictwa architektonicznego i urbanistycznego
PublikacjaTematyka niniejszej rozprawy dotyczy wpływu byłych, cywilnych portów lotniczych na kształtowanie nowej zabudowy na ich dawnym terenie. Przebadane zostają wartości kulturowe oraz społecznoekonomiczne pozostałej po nich infrastruktury. Rozwój i dzieje lotnictwa są przedmiotem zainteresowania historyków, a kwestie związane z budową nowych portów lotniczych - urbanistów, co czyni zagadnienia te przedmiotem licznych badań. Niemniej...
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Social development and ICT adoption. Recent evidence from developing world
PublikacjaThis paper is designed to provide empirical evidence on the relationship between the process of ICT diffusion and social development across selected low-income and lowermiddle- income countries during the period of 2000 and 2014. It main target it so identify whether in low-income and lower-middle-income economies, ICT development and social development (social empowerment) are correlated.
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On the influence of shell element properties on the response of car model in crash test
PublikacjaIt goes without saying that numerical simulations play important role in the modern engineering practice. Contemporary CAD environments combined with FEM solvers, along with computer power of modern processors, give the engineer fast and efficient tool. Ultimately, however it is the user alone who is responsible for the correctness of the results. As long as the FEM calculations remain in the sphere of academic exercise, the inevitable...
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Local mesh morphing technique for parametrized macromodels in the finite element method
PublikacjaThis paper presents a novel approach for enhancing the efficiency of the design process of microwave devices by means of the finite element method. It combines mesh morphing with local model order reduction (MOR) and yields parametrized macromodels that can be used to significantly reduce the number of variables in the FEM system of equations and acceleration of computer simulation. A projection basis for local reduction is generated...
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Recent advances in hydrodynamic cavitation-based pretreatments of lignocellulosic biomass for valorization
PublikacjaRecently, the hydrodynamic cavitation (HC)-based pretreatment has shown high effectiveness in laboratories and even in industrial productions for conversion of lignocellulosic biomass (LCB) into value-added products. The pretreatment capability derives from the extraordinary conditions of pressures at ∼500 bar, local hotspots with ∼5000 K, and oxidation (hydroxyl radicals) created by HC at room conditions. To promote this emerging...
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Special Issue "Applications of Finite Element Modeling for Mechanical and Mechatronic Systems"
PublikacjaNumerical modeling is very important in today's engineering because, among other things, it reduces the costs associated with prototyping or predicting the occurrence of potentially dangerous situations during operation in certain defined conditions. Different methods have so far been used to implement the real structure into the numerical version. The most popular have been variations of the finite element method (FEM). The aim...
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Recent Progress on Hydrogen Storage and Production Using Chemical Hydrogen Carriers
PublikacjaDepleting fossil fuel resources and anthropogenic climate changes are the reasons for the intensive development of new, sustainable technologies based on renewable energy sources. One of the most promising strategies is the utilization of hydrogen as an energy vector. However, the limiting issue for large-scale commercialization of hydrogen technologies is a safe, efficient, and economical method of gas storage. In industrial practice,...
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Recent Advances in Performance-Driven Surrogate Modeling of High-Frequency Structures
PublikacjaDesign of high‐frequency structures, including microwave and antenna components, heavily relies on full‐wave electromagnetic (EM) simulation models. Their reliability comes at a price of a considerable computational cost. This may lead to practical issues whenever numerous EM analyses are to be executed, e.g., in the case of parametric optimization. The difficulties entailed by massive simulations may be mitigated by the use of...
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Recent total cross section measurements in electron scattering from molecules
PublikacjaThe grand-total cross sections (TCSs) for electron scattering from a range of molecules, measured over the period 2009-2019 in various laboratories, with the use of different electron transmission systems, are reviewed. Where necessary, the presented TCS data are also compared to earlier results. Collection of investigated molecular targets (biomolecules, biofuels, molecules of technological application,hydrocarbons) reflects their...
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Reduced-Cost Constrained Modeling of Microwave and Antenna Components: Recent Advances
PublikacjaElectromagnetic (EM) simulation models are ubiquitous in the design of microwave and antenna components. EM analysis is reliable but CPU intensive. In particular, multiple simulations entailed by parametric optimization or uncertainty quantification may considerably slow down the design processes. In order to address this problem, it is possible to employ fast metamodels. Here, the popular solution approaches are approximation...
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Przebudowa obszarów kolejowych jako ważny element rewitalizacji obszarów śródmiejskich
PublikacjaOd lat osiemdziesiątych rozpoczęła się wielka kampania reklamowa kolei państwowych w poszczególnych krajach Europy Zachodniej. Upadający, tradycyjny przemysł opuszcza tereny przylegające do obszarów kolejowych. Dziewiętnastowieczne dworce kolejowe, łączące w sobie obsługę ruchu pasażerskiego i towarowego, stają się technologicznie przestarzałe. Na ich miejscu powstają nowoczesne terminale pasażerskie. Rejony dworców mogą połączyć...
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Porządek architektoniczny i urbanistyczny jako element przestrzennego zagospodarowania kraju
PublikacjaArtykuł został sporządzony jako ekspertyza na zlecenie Rządowego Centrum Studiów strategicznych. Obejmuje ona podsumowanie problematyki współczesnego rozwoju polskiej przestrzeni na tle historycznych uwarunkowań rozwoju kraju. Jednocześnie w artykule zawarto skrótowe podsumowanie wszystkich najważniejszych tendencji rozwojowych polskiej przestrzeni ze szczegółowym określeniem wynikających z nich problemów i zagrożeń.
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Finite element modeling of shear localization in granular bodies in hypoplasticity with enhancements
PublikacjaW pracy omówiono wyniki numeryczne lokalizacji okształceń stycznych w materiałach granulowanych. Obliczenia wykonano stosując prawo hipoplastyczne z rozszerzeniami w ramach mechaniki ośrodka gradientowego, nielokalnego i mikropolarnego. Obliczenia przeprowadzono dla różnych problemów brzegowych z uwzględnieniem lokalizacji. Wyniki analiz porównano z doświadczeniami.
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Thermgravimetric analysis (TGA) data of cement pastes containing pristine and silica-coated bismuth oxide and gadolinium oxide particles
Dane BadawczeThermogravimetric (TGA) data of cement pastes after 2, 7 and 28 days. Samples designations: Control, BG, BG-A and BG-B are associated with the specimen names in the associated publication.
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Influence of several biodegradable components added to pure and nanosilver-doped PMMA bone cements on its biological and mechanical properties
PublikacjaAcrylic bone cements (BC) are wildly used in medicine. Despite favorable mechanical properties, processability and inject capability, BC lack bioactivity. To overcome this, we investigated the effects of selected biodegradable additives to create a partially-degradable BC and also we evaluated its combination with nanosilver (AgNp). We hypothesized that using above strategies it would be possible to obtain bioactive BC. The Cemex...
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GDP growth in Iran
Dane BadawczeThe economy of the Islamic Republic of Iran is one of the fastest growing in the Middle East. Iran should not only be associated with crude oil industry but also other areas of the economy. The sanctions that hindered oil exports from Iran meant that the authorities had to take measures to increase exports of other products. There was an increase in...
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WYBRANE WŁAŚCIWOŚCI FIZYCZNO-CHEMICZNE MIKROSFER I MOŻLIWOŚĆ ICH WYKORZYSTANIA W KOMPOZYTACH CEMENTOWYCH : The selected physico-chemical properties of microspheres and possibility of their use in cement composites
PublikacjaMicrospheres are formed during the mineral transformation stage in coal combustion. Their content in fly ashes from the combustion of different types of coals varies over a rather wide range from 0.01 to 4.8 wt.%. The microspheres have three main elements, silicon, aluminum and iron, the oxides of which account for about 89.0 wt.% of the material. Mineralogical analysis using XRD shows that microspheres mainly contain mullite and...
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Argyrophilic nucleolar organizer regions (AgNORs) in interphases and metaphases of normal and neoplastic gill cells of Macoma balthica (Bivalvia: Tellinidae) from the Gulf of Gdansk, Baltic Sea
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A new dilution-enrichment sample preparation strategy for expanded metabolome monitoring of human breast milk that overcomes the simultaneous presence of low- and high-abundance lipid species
PublikacjaThe complex nature of human breast milk (HBM) makes samples difficult to analyze, requiring several extraction techniques and analytical platforms to obtain high metabolome coverage. In this work, we combined liquid-liquid extraction (LLE) and solid-phase extraction (SPE) techniques to prepare HBM samples to overcome the challenge of low- and high-abundance lipid species, enabling the semiquantitative analysis of total HBM lipids...
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Mild X-linked Alport syndrome due to the COL4A5 G624D variant originating in the Middle Ages is predominant in Central/East Europe and causes kidney failure in midlife
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The effect of high pressure and sub-zero temperature on total antioxidant capacity and the content of vitamin C, fatty acids and secondary products of lipid oxidation in human milk
PublikacjaThe objective of this study was to compare of the effects of high pressure of 193 MPa at - 20°C and Low Temperature Long Time pasteurization (LTLT or holder pasteurization, 62,5°C; 30 min) on the content and composition of fatty acids (FAs), concentrations of secondary products of lipid oxidation (TBARS), the total antioxidant capacity (TAC), total vitamin C and ascorbic acid (AsA) content in human milk. It was shown that no significant...
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Mild X-linked Alport syndrome due to the COL4A5 G624D variant originating in the Middle Ages is predominant in Central/East Europe and causes kidney failure in midlife
PublikacjaA study of 269 children enrolled into a National Registry for children with persistent glomerular hematuria identified 131 individuals with genetically confirmed X-linked Alport Syndrome. A single variant c.1871G>A p.Gly624Asp (G624D) in COL4A5 was predominant and accounted for 39% of Xlinked Alport Syndrome in unrelated Polish families (44 of 113). To evaluate its origins, the genetic variation in a 2.79 Mb segment encompassing...
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Pertussis outbreak in Polish shooters with adverse event analysis
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Mercury intrusion porosimetry (MIP) results of cement pastes containing Bi2O3/Gd2O3 and silica-coated Bi2O3/Gd2O3 structures
Dane BadawczeMercury intrusion porosimetry (MIP) data - curves of cement pastes containing Bi2O3/Gd2O3 and silica-coated Bi2O3/Gd2O3 structures
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Mechanical properties of cement pastes containing pristine and silica-coated bismuth oxide (Bi2O3) and gadolinium oxide (Gd2O3) structures
Dane BadawczeExcel file containing raw mechanical (compressive strength) data of cement pastes containing variable amount of Bi2O3, Gd2O3, Bi2O3-SiO2 and Gd2O3-SiO2 structures. Sample designation in the Excel file is in line with sample designation in the manuscript associated with dataset.
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Rheological properties of cement pastes containing pristine Bi2O3-Gd2O3 and silica coated Bi2O3-Gd2O3 core-shell structures
Dane BadawczeRheological data of cement pastes containing Bi2O3/Gd2O3 particles using MCR 72 (Anton Paar) stress-imposed rheometer, equipped with vane geometry.
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Fatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (Direct tension, over 28 days of curing at 20C)
Dane BadawczeFatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (Direct tension, over 28 days of curing at 20C)
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Fatigue data of Cement Bitumen Treated Material Mixture C3E5.5 (over 28 days of curing at 20C, field cores)
Dane BadawczeDataset presents data of fatigue life determined for cold recycled mixture – cement bitumen treated material mixture with following binding agents: 3% cement and 5.5% emulsion (C3E5.5). Mixture was designed according to Polish requirements for the base course of pavement. Mixture contains 60% of RAP material. Specimen size: f=100 mm, h=48,4 - 70,9 mm.
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Effect of particle size of aluminosilicate microspheres on the change of hydration heat of cement mortars and selected physical, chemical, and mechanical properties.
Dane BadawczeThis subject of the work is the study of selected properties of cement mortars containing two fractions of aluminosilicate microspheres with grain size in the range of 125 to 250 μm and from 250 to 500 μm. Mortar mixtures with ordinary Portland cement (OPC 42.5R) and three substitution rates of cement by microspheres, 1.5%, 3.5%, and 5.0%, were investigated....
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Cogent Engineering
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Cogent Geoscience
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Selection of Organic Coating Systems for Corrosion Protection of Industrial Equipment
PublikacjaThe most important element of corrosion protection in industrial conditions is the protective coating system. However, selecting the right coating can often be a real problem due to the sheer number of coating manufacturers and their products on the market. A quantitative approach based on the data mining technique used to analyze the obtained multi-site exposure data has been proposed. This was demonstrated by the example of the...
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Transition dipole moment functions of the KRb molecule
Dane BadawczeElectronic transition dipole moment functions (TDMF) have been calculated for the singlet (s) and triplet (t) Sigma+ (S+), Pi (P), and Delta (D) electronic states of the KRb molecule. TDMFs are needed in understanding processes like photodissociation, photoassociation, cooling, and trapping of molecules. All results of the transition dipole moments...
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Validation of lumbar spine finite element model
Dane BadawczeThe functional biomechanics of the lumbar spine have been better understood by finite element method (FEM) simulations. However, there are still areas where the behavior of soft tissues can be better modeled or described in a different way. The purpose of this research is to develop and validate a lumbar spine section intended for biomechanical research....
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Permanent dipole moment functions of the KRb molecule
Dane BadawczeElectronic permanent dipole moment functions (PDMF) have been calculated for the singlet (s) and triplet (t) Sigma+, Sigma-, Pi, and Delta electronic states of the KRb molecule. PDMFs are needed in understanding processes like photodissociation, photoassociation, cooling, and trapping of molecules. All results of the permanent dipole moments have been...
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School psychologist’s interventions to promote successful school re-entry of chronically ill children aiming at altering peers’ attitudes towards them
PublikacjaThe aim of this article is to outline school psychologist’s interventions, which might be useful while supporting a chronically, somatically ill child in their re-entry to school, aiming at broadening their peers’ knowledge about the chronic disease and positively changing their attitudes towards the ill child. In the first part, the importance of peer relationships in childhood and adolescence, the relation of their quality...
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Rozwój technik ekstrakcji w których wykorzystuje się wirujący element sorpcyjny
PublikacjaW artykule przedstawiono technikę ekstrakcji SBSE i prace rozwojowe nad jej udoskonaleniem, przyczyniające się do miniaturyzacji oraz pozwalające na redukcję ilości stosowanych rozpouszczalników
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RECENT DEVELOPMENTS IN POLYURETHANE FOAMS CONTAINING LOW-COST AND PRO-ECOLOGICAL MODIFIERS
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