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Tytuł:
Conditions of development of structural relief in crystalline rocks (case study: Murmansk Upland and Kandalaksha region, Kola Peninsula, Russia)
Autorzy:
Superson, W.
Huber, M.
Zgłobicki, W.
Powiązania:
https://bibliotekanauki.pl/articles/294877.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
crystalline rocks
structural relief
Kola Peninsula
Opis:
Structural relief is exceptionally recognisable in areas where igneous and metamorphic rocks without a Quaternary cover occur, which is the case with the Kola Peninsula. However, the subject of structural relief has been addressed relatively rarely. Therefore, an attempt was made to estimate the influence of tectonic and lithologic factors on the relief within two test areas, each covering approximately 100 km2, located on the coast of the Barents Sea (Murmansk Terrane) and the White Sea (Lapland Granulite Belt). The structural relief here is varied, which results from differences in the geological structure. In the former area, depressions and tectonic blocks of varying size and order predominate, while east of Kandalaksha these are flattened hills with asymmetrically inclined slopes (having the character of cuestas). Although lithologically diverse, the test areas share a common feature: the presence of numerous faults and dislocation zones that in the case of the Barents Sea caused the division of igneous rocks into several blocks of various orders. Most of the relief forms in this area were found to have structural origins, namely valley depressions of various orders, slopes and escarpments, lake basins and seaside cliffs. The structural relief of the Murmansk Terrane is determined by disjunctive structures. In the case of the Lapland Granulite Belt, the relief of the analysed macroblock is closely linked with the formation and position of the rocks – this is escarpment relief.
Źródło:
Landform Analysis; 2013, 22; 103-109
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mesomorphic properties of liquid crystalline compounds with central linkage chalconyl ester and laterally substituted bromo group
Autorzy:
Patel, Patel
Patel, R. B.
Shah, R. R.
Powiązania:
https://bibliotekanauki.pl/articles/1191246.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Nematic; Liquid crystalline; Mesomorphic; Enantiotropic
Smectic
Opis:
To investigate the mesomorphic property of the substitution on mesomorphism, the new series of liquid crystals having the following structures have been synthesized. Presently synthesized series contain thirteen homologue (C1 to C8, C10, C12, C14, C16, C18) in which eleven homologue (C3 to C18) shows both smectic as well as nematic phase during heating and cooling condition in enantiotropic manner, while C2 homologue shows only nematic phase. All the homologues were characterised by elemental analysis and spectroscopic techniques like 1H-NMR and IR analysis. Their liquid crystalline behaviours were measured by polarised optical microscope (POM) and Differencial Scanning Calorimetry (DSC).
Źródło:
World Scientific News; 2016, 54; 202-216
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Nano-Duplex NANOS-BA Steel for Application in Construction of Armours
Autorzy:
Garbarz, B.
Burian, W.
Marcisz, J.
Wiśniewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/403624.pdf
Data publikacji:
2012
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
materials engineering
armour plates
nano-crystalline steel
Opis:
The paper presents mechanical and physical properties measured in static conditions, and some properties determined in dynamic conditions, of plates of new nano-composite bainite-austenite (NANOS-BA) steel to be used for construction of armours. Firing tests of NANOS-BA steel plates fixed on a base plate of RHA (Rolled Homogenous Armour), Armox 500T and Armox 600T steel, carried out by means of 12.7 mm B-32 projectiles have demonstrated that in the conditions of tests, NANOS-BA steel shows better protective properties than 500BHN and 600BHN – grade commercial plates. NANOS-BA steel plate of minimum 5 mm thickness has protected Armox 500T and Armox 600T plate from piercing. Quantitative effects were assessed of firing the NANOS-BA steel plates of 50 x 50 mm and 100 x 100 mm surface dimensions, and thickness in the range of 5÷10 mm, as well as sets of the NANOS-BA steel plates of 100 x 100 x (4÷8) mm dimensions, arranged in layers on the base plate. It was determined that ballistic limit V50 for NANOS-BA plate of 6.0 mm thickness, for the 7.62 x 51 mm M61 AP (Armour Piercing) projectile, amounts to 797±10 m/s. Based on the analysis which compared results of tests carried out with the application of various parameters it was estimated that the value of V50 obtained for NANOS-BA steel is higher than the parameters of the highest grade steel plates offered in the global market. The tests imply that NANOS-BA steel is a prospective material for armour construction which can enable to reduce weight of armours and/or to improve their protective parameters in comparison with the presently used structures. Due to very high protective capability, monolithic plates of NANOS-BA steel can be used as one of the layers of the composite armour.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2012, 3, 4 (10); 7-22
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of the crystalline structure of the complex system containing doped polyaniline by use of genetic algorithms
Autorzy:
Kozik, T.
Luzny, W.
Powiązania:
https://bibliotekanauki.pl/articles/134891.pdf
Data publikacji:
2015
Wydawca:
Tomasz Mariusz Majka
Tematy:
polyaniline
genetic algorithms
computer modeling of crystalline structure
Opis:
The structure of polyaniline (PANI) protonated with camphorsulphonic acid (CSA) has been subject to research for a long time. Despite several, various models being proposed throughout the years, there is still no model widely accepted as the only correct and final one of its crystalline phase. In this paper a computer program named MoleculeEditor is described. Created basing on the concepts of an existing but significantly different program named CrystalFinder, it is a software dedicated to finding a model of the crystalline regions of the PANI/CSA system based on an input X-ray diffraction pattern. In its search it takes advantage of the genetic algorithm technique for optimizing the model parameters to fit the computed diffraction pattern to the one loaded as input. A successful example of it being employed to find the parameters of a prepared beforehand, fictional structure of the system, is presented. Conclusions drawn from this application of the prepared software cannot be ignored in the further search for the actual model of this complex system using this program. Obtaining results from MoleculeEditor for actual, experimental data is however still in progress.
Źródło:
Journal of Education and Technical Sciences; 2015, 2, 1; 9-14
2300-7419
2392-036X
Pojawia się w:
Journal of Education and Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polyurethanes from the crystalline prepolymers resistant to abrasive wear
Autorzy:
Domańska, Agata
Boczkowska, Anna
Izydorzak-Woźniak, Marta
Jaegermann, Zbigniew
Grądzka-Dahlke, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/778795.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
polyurethane
crystalline prepolymer
abrasive wear
adhesion
friction coefficient
endoprosthesis
Opis:
The research aimed at the selection of polyurethanes synthesized from poly(tetramethylene ether) glycol (PTMEG), as well as from two different isocyanates 4,4′-methylenebis(cyclohexyl)isocyanate (HMDI) and 4.4′-methylenebis(phenyl isocyanate) (MDI) in order to obtain polyurethane with increased resistance to abrasive wear and degradation for bio-medical application. Polyurethanes were fabricated from crystalline prepolymers extended by water. The paper presents preliminary results on polyurethane surface wettability, friction coeffi cient for different couples of the co-working materials such as polyurethane–polyurethane, polyurethane–titanium alloy, polyurethane–alumina, in comparison to commonly used polyethylene–titanium alloy. Shear strength of polyurethane–alumina joint, as well as viscosity of prepolymers were also measured. The values of friction coeffi cient were compared to literature data on commercially available polyurethane with the trade name Pellethane. Polyurethanes obtained are characterized by low abrasive wear and low friction coeffi cient in couple with the titanium alloy, what makes them attractive as possible components of ceramic-polymer endoprosthesis joints.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 4; 14-20
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Superalloy Structure on Ultrasonic Wave Parameters
Autorzy:
Nawrocki, J.
Gancarczyk, K.
Manaj, W.
Albrecht, R.
Cygan, R.
Krupa, K.
Powiązania:
https://bibliotekanauki.pl/articles/97805.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
ultrasonic nondestructive testing
superalloy
turbine blade
macrostructure
crystalline orientation
Opis:
This paper analyses the nickel based superalloy Inconel 713C casts typically used in high and low pressure turbines of aircraft engines. The ingots were manufactured in the Research and Development Laboratory for Aerospace Materials at the Rzeszów University of Technology. The superalloy structures were analysed by the following methods: X-ray diffraction orientation measurement and ultrasonic wave propagation. Ultrasonic techniques are mainly used to measure the blade wall’s thickness. Measurement accuracy is determined by the velocity of the ultrasonic wave in the material tested. This work evaluates the effect of the nickel-based superalloy microstructure on the velocity of the ultrasonic wave propagation. Three different macrostructures: equiax (EQ), directionally solidified (DS) and single crystal (SX) were analysed. The authors determined the crystal misorientation in the obtained casts as the deviation of [001] crystallographic direction from the withdrawal axis or the main axis of the ingots. The measurements performed allowed researchers to identify significant differences in the wave velocity between EQ, DS and SX structures.
Źródło:
Fatigue of Aircraft Structures; 2015, 7; 61-65
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametry hydrogeologiczne skał drenowanych przez stare wyrobiska górnicze w rejonie Miedzianki i Ciechanowic (Sudety Zachodnie)
Hydrogeological parameters of rocks drained by the old mine workings in the area of Miedzianka and Ciechanowice (Western Sudetes)
Autorzy:
Wąsik, M.
Wąsowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/951806.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
parametry hydrogeologiczne
skały krystaliczne
Ciechanowice
Miedzianka
hydrogeological parameters
crystalline rocks
Opis:
Artykuł prezentuje wyniki badań parametrów hydrogeologicznych, wykonanych na terenach nieczynnych kopalń Cu, Ag i As w Miedziance i Ciechanowicach (Sudety Zachodnie). W profilu geologicznym wydziela się luźne osady czwartorzędowe oraz pokrywy zwietrzelinowe leżące na skałach krystalicznych masywu karkonosko-izerskiego oraz kaczawskiego łupkowo-zieleńcowego pasma fałdowego. Stwierdzono, że nieczynne wyrobiska górnicze decydują o wysokości potencjału zasobności. Najwyższe wartości tego parametru (powyżej 50 tys. m3) uzyskano dla rejonów najbardziej pociętych wyrobiskami górniczymi. Nie zaobserwowano wpływu wyrobisk górniczych na wielkości pozostałych parametrów skał. Oznaczenia wartości współczynników filtracji, porowatości efektywnej, odsączalności grawitacyjnej i wodochłonności wykonane w sąsiedztwie oraz w oddaleniu od wyrobisk bardziej zależą od litologii, lokalnej tektoniki oraz stopnia zwietrzenia. [...]
The paper presents the results of the hydrogeological parameter investigations carried out in the areas of abandoned polymetallic mines in Miedzianka and Ciechanowice (Western Sudetes). Their geological profile is a mixture of separated loose Quaternary deposits and wheathering covers lying on the crystalline rocks of the Izera-Karkonosze Massif and Kaczawa greenstone-and-slate-fold belt. It was found that the abandoned mining excavations determine the resources potential. The highest values of this parameter (above 50 thousand m3) were obtained for the areas that had been mostly cut by mining excavations. No impact of the mine excavations on other rock parameters (hydraulic conductivity, storage coefficient, effective porosity, water-storage capacity) was found. The determinations made in the vicinity and at a distance from the excavations depend more on lithology, local tectonics and weathering grade. [...]
Źródło:
Gospodarka Surowcami Mineralnymi; 2015, 31, 2; 173-190
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silicosis in Switzerland
Autorzy:
Koller, Michael F.
Scholz, Stefan M.
Pletscher, Claudia
Miedinger, David
Powiązania:
https://bibliotekanauki.pl/articles/2162017.pdf
Data publikacji:
2018-10-23
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
lung cancer
silicosis
quartz
occupational exposure limit
crystalline silica
Switzerland
Opis:
Objectives The correlation between quartz dust concentrations in the Swiss enterprises and the incidence of silicosis and other related diseases acknowledged as occupational diseases (OD) was investigated. Material and Methods Quartz dust concentrations were obtained from Suva’s databases of occupational health surveillance measurements between 2005 and 2014. Information on quartz dust-related diseases was from medical dossiers of workers with OD acknowledged by Suva between 2005 and 2014. Results The median quartz dust concentration of the 2579 measurements between 2005 and 2014 was 0.09 mg/m³ (alveolar fraction). Out of all measurements, 28% were above the Swiss occupational exposure limit (OEL) of 0.15 mg/m³ (alveolar fraction). One hundred eighty-one individuals suffered from acknowledged quartz dust-related disease (179 silicosis and 2 chronic obstructive pulmonary disease (COPD)). Additionally, 8 out of these workers were diagnosed with lung cancer and 55 with COPD of a non-specified cause. Out of all workers, 46% were exposed to silica dust for the first time before 1975 when the current Swiss OEL was introduced. Out of the foreign workers, 63% began to work abroad, during which they could have at least partly acquired their silicosis. Out of all workers, 75% were ever-smokers. Conclusions The incidence of silicosis decreased drastically from approximately 300 cases/year in the 1970s to fewer than 20 cases/year 20 years ago. Several findings of this study that could help to interpret the ongoing occurrence of the disease include excessive exposure in or outside of Switzerland in former or current times, vulnerability to the development of silicosis due to cigarette smoke, or poor compliance with wearing breathing masks. Int J Occup Med Environ Health 2018;31(5):659–676
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 659-676
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Finite Element Analysis of Asymmetric Rolling of 6061 Aluminum Alloy Using Two-Scale Elasto-Plastic Constitutive Relation
Autorzy:
Wronski, M.
Wierzbanowski, K.
Wronski, S.
Bacroix, B.
Lipinski, P.
Powiązania:
https://bibliotekanauki.pl/articles/355456.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
asymmetric rolling
6061 aluminum
finite element method
crystalline deformation model
Opis:
The goal of this work was theoretical and experimental study of micro- and macroscopic mechanical fields of 6061 aluminum alloy induced by the asymmetric rolling process. Two-scale constitutive law was used by implementing an elasto-plastic self-consistent scheme into the Finite Element code (ABAQUS/Explicit). The model was applied to study the asymmetric rolling. Such a deformation process induces heterogeneous mechanical fields that were reproduced by the model thanks to the crystallographic nature of constitutive law used. The studied material was processed, at room temperature, in one rolling pass to 36% reduction. The resulting material modifications were compared with predictions of the two-scale model. Namely, the calculated textures were compared with experimental ones determined by X-ray diffraction. Especially, detailed quantitative analysis of texture variation across the sample thickness was done. The influence of this texture variation on plastic anisotropy was studied. The advantages of asymmetric rolling process over symmetric one were identified. The main benefits are a nearly homogeneous crystallographic texture, reduced rolling normal forces and homogenization of plastic anisotropy through the sample thickness.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 1991-1999
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considering semi-crystallinity in molecular simulations of mechanical polymer properties – using nanoindentation of polyethylene as an example
Autorzy:
Fritz, Susanne
Powiązania:
https://bibliotekanauki.pl/articles/29520097.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
MD
simulation
polymer
polyethylene
semi-crystalline
mechanical properties
crystallization
nanoindentation
Opis:
Molecular dynamic (MD) simulations have been used to investigate the response of semi-crystalline polymers in nanoindentation tests, using polyethylene (PE) as an example. To that purpose, semi-crystalline simulation boxes of linear PE with various chain lengths up to C2000 were created by homogeneous nucleation during the non-isothermal cooling of melts. The final crystallinity depended on the chain length and the cooling rate used and could be estimated using various parameters like density, fraction of bonds in trans conformation, and energy terms. The simulation boxes were transferred into surface models and subjected to nanoindentation tests using non equilibrium MD. This allowed the deformation behaviour of the material to be analysed directly. Strong dependencies on the crystallinity of the PE were found, which underlines the importance of considering crystallinity when investigating the mechanical properties of semi-crystalline polymers by means of simulations.
Źródło:
Computer Methods in Materials Science; 2021, 21, 1; 35-50
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania geochronologiczne skał podłoża krystalicznego na obszarze północno-wschodniej Polski : przegląd i podsumowanie
Geochronological studies on the crystalline bedrock from NE Poland : an overview and summary
Autorzy:
Jarmołowicz-Szulc, K.
Powiązania:
https://bibliotekanauki.pl/articles/2075683.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
podłoże krystaliczne
NE Poland
odwierty
geochronologia
crystalline basement
boreholes
geochronology
Opis:
Since the mid-1950s, when Jerzy Znosko started his huge contribution to the recognition of the crystalline basement of NE Poland, many different studies have followed the planned and implemented drilling projects. The drillings, conducted in the first decade under the leadership of Professor Znosko and under his description of the results, were further worked out by other researchers. Studies concerned petrological, geochemical and miner- alogical aspects. In that fan of methods applied, geochronological data started to be introduced to the bibliography of the area in the early 1960s. Geochronological methods that time mean mostly K-Ar and some Rb-Sr values. These materials are gathered in the paper aiming at its presentation, re-valuation and interpretation in terms of the significance of such data for further development of knowledge.
Źródło:
Przegląd Geologiczny; 2017, 65, 12; 1536--1539
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new magnetic anomaly map of Poland and its contribution to the recognition of crystalline basement rocks
Autorzy:
Petecki, Z.
Rosowiecka, O.
Powiązania:
https://bibliotekanauki.pl/articles/2060591.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
magnetometry
Earth’s total magnetic field map
pseudogravity
crystalline basement
Polska
Opis:
Magnetic total field measurements acquired in Poland between 1974 and 2011 have been compiled in a new digital database that provides a complete picture of magnetic anomalies of the country. The data compilation and further processing procedures used to create the magnetic anomaly database and maps that accompany this article are briefly summarized. The reduced-to-the-pole and pseudogravity anomaly maps were computed to accurately locate anomalies above their causative bodies as well as to simplify anomaly patterns and emphasize principal magnetic domains within the basement. An interpretation of the magnetic maps reveals a lot of magnetic basement provinces and domains indicating basement division into blocks and structural elements, which are important for understanding the regional tectonic setting of Poland.
Źródło:
Geological Quarterly; 2017, 61, 4; 934--945
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Polish Basin - relationship between the crystalline consolidated and sedimentary crust
Autorzy:
Dadlez, R.
Powiązania:
https://bibliotekanauki.pl/articles/2058932.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Mid-Polish Trough
Polish Basin
sedimentary crust
consolidated crust
crystalline crust
Opis:
In the area of the Polish Basin five deep seismic sounding profiles, recorded during 1991–1997, were used to compare the structure of the crystalline and consolidated crusts with that of the sedimentary cover. Repeated reactivation of deep crustal fractures controlled the thickness distribution and development of faults in Palaeozoic andMesozoic sequences.NW–SE toWNW–ESE basin-parallel and transverse N–S to NE–SW striking fracture systems are evident. The former includes the isseyre–Tornquist Zone that marks the profound crustal boundary between the East European Craton and the typical Trans-European Suture Zone (TESZ) crust that is characterized by a variably thick consolidated upper crustal layer, composed of Caledonian-deformed Early Palaeozoic and possibly Vendian sediments, and defines the NE boundary of the Permian and Mesozoic Mid-Polish Trough (MPT). Its northwestern TTZ segment was intermittently active throughout the whole geological history of the area. The SWboundary of the TESZ, marked by the Dolsk Fault across which the consolidated crustal layer is replaced by a crystalline Variscan upper crust, is only evident on profiles LT-7 and P4. The deformation front of the Variscan Externides is located some 100 km to the NE of the Dolsk Fault within the confines of the TESZ crust. On profiles TTZ-PL and P2, significant lateral changes in the thickness of the consolidated and crystalline crust of the Pomeranian, Kuiavian and Holy Cross Mts. segments of the MPT are noted that coincide with the transverse Bydgoszcz-Poznań-Toruń and Grójec fault zones. These crustal changes are associated with substantial changes in the composition and thickness of supracrustal sedimentary sequences and the degree of inversion of the MPT.
Źródło:
Geological Quarterly; 2006, 50, 1; 43-58
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wirelessly Powered High-Temperature Strain Measuring Probe Based on Piezoresistive Nanocrystalline Diamond Layers
Autorzy:
Bouřa, A.
Kulha, P.
Husák, M.
Powiązania:
https://bibliotekanauki.pl/articles/220924.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nano-crystalline diamond
strain sensor
high temperature
remote sensing
wireless powering
Opis:
A high-temperature piezo-resistive nano-crystalline diamond strain sensor and wireless powering are presented in this paper. High-temperature sensors and electronic devices are required in harsh environments where the use of conventional electronic circuits is impractical or impossible. Piezo-resistive sensors based on nano-crystalline diamond layers were successfully designed, fabricated and tested. The fabricated sensors are able to operate at temperatures of up to 250°C with a reasonable sensitivity. The basic principles and applicability of wireless powering using the near magnetic field are also presented. The system is intended mainly for circuits demanding energy consumption, such as resistive sensors or devices that consist of discrete components. The paper is focused on the practical aspect and implementation of the wireless powering. The presented equations enable to fit the frequency to the optimal range and to maximize the energy and voltage transfer with respect to the coils’ properties, expected load and given geometry. The developed system uses both high-temperature active devices based on CMOS-SOI technology and strain sensors which can be wirelessly powered from a distance of up to several centimetres with the power consumption reaching hundreds of milliwatts at 200°C. The theoretical calculations are based on the general circuit theory and were performed in the software package Maple. The results were simulated in the Spice software and verified on a real sample of the measuring probe.
Źródło:
Metrology and Measurement Systems; 2016, 23, 3; 437-449
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the crystalline structure of cellulose on the production of ethanol from lignocellulose biomass
Autorzy:
Smuga-Kogut, M.
Zgorska, K.
Szymanowska-Powalowska, D.
Powiązania:
https://bibliotekanauki.pl/articles/24807.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
crystalline structure
cellulose
ethanol production
lignocellulose biomass
reducing sugar
ionic liquid
Źródło:
International Agrophysics; 2016, 30, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EKSPRESJONIZM W ARCHITEKTURZE EUROPEJSKIEJ; CIĄGŁOŚĆ TRADYCJI
EXPRESSIONISM IN THE EUROPEAN ARCHITECTURE. CONTINUITY OF TRADITION
Autorzy:
Tobolczyk, Marta
Powiązania:
https://bibliotekanauki.pl/articles/509508.pdf
Data publikacji:
2017
Wydawca:
Akademia Finansów i Biznesu Vistula
Tematy:
architektura
ekspresjonizm
forma krystaliczna
forma geomorficzna
architecture
expressionism
crystalline form
geomorphic form
Opis:
Nurt architektury ekspresjonistycznej, rozwijającej się w Europie w latach 1910-1930, wprowadził nowy typ ekspresji w architekturze, oddającej w rzeźbiarskich biomorficznych i geomorficznych formach dynamikę pracy konstrukcji i plastykę formy architektonicznej, którą umożliwiło stosowanie innowacyjnych technologii żelbetu, stali i szkła. Celem artykułu jest przedstawienie ciągłości tradycji ekspresjonistycznej w odmiennych uwarunkowaniach społecznych, politycznych i technologicznych. Do idei zainicjowanych przez twórców początku XX wieku powracano w połowie poprzedniego stulecia oraz obecnie. Koncepcje szklanych domów i krystalicznie przejrzystych wieżowców, pozostające w czasach I wojny światowej w sferze fantazji, doczekały się pod koniec poprzedniego stulecia nie tylko realizacji, ale stały się modernistycznym standardem. Dziś ekspresjonistyczne formy, z pominięciem metafizycznych treści, kreują twórcy posługujący się komputerowymi technikami algorytmicznymi i parametrycznymi1. Metoda badawcza opiera się na analizie przedstawianych obiektów architektury, przeprowadzonej na podstawie literatury, dostępnej dokumentacji architektonicznej, ale przede wszystkim własnego doświadczenia i znajomości omawianych przykładów. Przeprowadzone studia przypadku i badania mają wartość edukacyjną i praktyczną, stanowiąc źródło wiedzy i inspiracji dla twórczości architektonicznej.
The expressionist movement in architecture, thriving in Europe in the years 1910-1930, introduced a new type of appearance in architecture, expressing in its biomorphic and geomorphic forms the dynamic work of structure and plasticity, enabled by usage of innovative technologies, reinforced concrete, steel and glass. The aim of the article is to present the continuity of the expressionist tradition in different social, political and technological circumstances. Some ideas launched by architects of the early 20th century, were rediscovered in the middle of the previous century and nowadays. The concepts of glass houses and crystalline transparent skyscrapers remaining in times of World War I in the realm of fantasy were implemented at the end of the previous century, and moreover they became the modernist standard. Nowadays, when algorithmic and parametric computer techniques have become a common tool, the sculptural forms are popular means of expression. The research method will be an analysis of the selected architecture examples based on the literature, architectural documentation available, but, above all, on the author’s own experience of visiting the presented sites. The carried out case studies and research have an educational and practical value, acting as a source of knowledge and inspiration for architectural creativity.
Źródło:
Zeszyty Naukowe Uczelni Vistula; 2017, 53(2) Architektura; 57-80
2353-2688
Pojawia się w:
Zeszyty Naukowe Uczelni Vistula
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluor (F-) w wodach termalnych Cieplic Śląskich
Fluorine (F-) in thermal waters of Cieplice Śląskie
Autorzy:
Kiełczawa, B.
Powiązania:
https://bibliotekanauki.pl/articles/170514.pdf
Data publikacji:
2016
Wydawca:
Poltegor-Instytut Instytut Górnictwa Odkrywkowego
Tematy:
Cieplice Śląskie
skały krystaliczne
wody termalne
fluor
crystalline rocks
thermal waters
fluorine
Opis:
W artykule omówiono zawartości jonów fluorkowych w poszczególnych ujęciach wód termalnych w Cieplicach Śląskich. Określono stopień nasycenia omawianych wód względem głównych minerałów skałotwórczych i prawdopodobnych produktów ich wietrzenia. Omawiane wody termalne są przesycone fluorytem. Przedstawiono analizę zależności pomiędzy głównymi składnikami wód i jonami F. Podjęto próbę określenia pochodzenia fluorków obecnych w wodach termalnych Cieplic Śląskich.
The article describe the contents of fluoride ions in particular intakes of thermal waters in Cieplice Śląskie. The saturation state for main minerals and their possible weathering products is shown and the thermal water is found out to be saturated for fluorite. The analysis of the relationship between the main components of water and ions F-fluorite. The analysis of the relationship between the main components of water and ions F-fluorite. The analysis of the relationship between the main components of water and ions F was presented. An attempt to determine the origin of fluoride in thermal waters of Cieplice Śląskie was made.
Źródło:
Górnictwo Odkrywkowe; 2016, 57, 1; 16-22
0043-2075
Pojawia się w:
Górnictwo Odkrywkowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Granica życia i śmierci. Motyw kryształowej tafli w opowiadaniu E.T.A. Hoffmanna "Kopalnie w Falun"
Autorzy:
Szybisty, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1186570.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
E.T.A. Hoffmann
The Mines of Falun
crystalline membrane
hermeneutical reading
Opis:
The article seeks to analyse the symbolic significance of the crystalline membrane featured in Elis Fröbom’s dream; he is the main character of E.T.A. Hoffmann’s short story entitled The Mines of Falun. There prevails extensive consensus in the critical literature, that the dreamy landscape of the cave externalises the deepest layers of Elis’ psyche; in addition, this scene presents a key to the understanding of the whole story. The application of hermeneutical close reading and the augmentation of this analysis through invoking the vintage symbolic that accreted around the notion and image of crystal in the literature, philosophy and the science of the Romanticism era warrant the postulation of a thesis, that the mute queen appearing in the aforementioned intriguing vision can be construed as a corporeal symbolisation of death, deeply yearned for by the main character. As far as the crystalline membrane partitioning the cave into two realms is concerned, we may hazard a surmise that it functions as a peculiar delineation of life, the frontier where the inorganic world transitions into its organic extension.
Źródło:
Załącznik Kulturoznawczy; 2019, 6; 339-353
2392-2338
Pojawia się w:
Załącznik Kulturoznawczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooling Characteristic and Microstructure of Ni-Si-B-Ag Alloy
Autorzy:
Wojciechowska, M.
Ziewiec, K.
Mucha, D.
Powiązania:
https://bibliotekanauki.pl/articles/356071.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
amorphous/crystalline composite
scanning electron microscopy
X-ray diffraction
thermography
melt spinning
Opis:
The aim of this work was to investigate the possibility of obtaining an amorphous/crystalline composite starting from Ni-SiB-based powder grade 1559-40 and silver powder. The alloy was produced using arc melting of 95% wt. Ni-Si-B-based powder (1559-40) and 5% wt. Ag powder. Ingot was re-melted on a copper plate and observed while cooling using a mid-wave infra-red camera. The alloy was then melt-spun in a helium atmosphere. The microstructure of the ingot as well as the melt-spun ribbon was studied using light microscopy and scanning electron microscopy with energy dispersive spectrometry. Phase identification was performed by means of X-ray diffraction. The observations confirmed an amorphous/crystalline microstructure of the ribbon where the predominant constituent of the microstructure was an amorphous phase enriched with Ni, Si, and B, while the minor constituent was an Ag-rich crystalline phase distributed in a film along the melt-spinning direction.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1357-1360
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystalline structures of Rb2UBr6 ionic conductor determined by neutron diffraction
Autorzy:
Małetka, Krzysztof
Ressouche, Eric
Rundlof, Hakan
Tellgren, Rolland
Szczepaniak, Włodzimierz
Zabłocka-Malicka, Monika
Powiązania:
https://bibliotekanauki.pl/articles/146364.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
neutron diffraction
Ionic conductivity
solid electrolyte
phase transitions
crystalline structure
uranium bromide
Opis:
The neutron powder diffraction technique has been used for structural studies of Rb2UBr6 solid electrolyte as a function of temperature. The low-, room-, and high-temperature structures have been determined. At the temperature range of 4.2–80 K, the compound crystallizes in a monoclinic unit cell in the P21/c space group. At 80 K and 853 K, the compound crystallizes in a tetragonal unit cell in the P4/mnc space group. At 300 K, the lattice constants are a = b = 7.745(1) and c = 11.064(1) Å. At the temperature range of 853–960 K, a trigonal phase is observed in the P–3ml space group.
Źródło:
Nukleonika; 2020, 65, 1; 3-11
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza składu granulometrycznego glukozy krystalicznej
Analysis of the granulometric composition of crystalline glucose
Autorzy:
Bakier, S.
Miastkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/227568.pdf
Data publikacji:
2010
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
glukoza krystaliczna
monohydrat glukozy
skład granulometryczny
crystalline glucose
glucose monohydrate
granulometric composition
Opis:
W pracy przedstawiono wyniki badań w składzie granulometrycznym glukozy krystalicznej wyprodukowanej na bazie dwóch surowców: skrobi ziemniaczanej i skrobi pszennej. Pomiary wymiarów geometrycznych kryształów glukozy prowadzono w oparciu o obrazy uzyskane w warunkach interferometrii birefrakcyjnej w świetle przejściowym z wykorzystaniem komputerowej analizy obrazów i programu analySIS. Charakterystykę składu granulometrycznego prowadzono na bazie populacji składającej się z 2000 kryształów. Sporządzano histogramy rozkładu liczbowego kryształów wg średnicy maksymalnej z wykorzystaniem programu Statistica 9.0. Ponieważ uzyskane rozkłady wykazywały znamiona rozkładu wykładniczego dobierano parametr l (charakteryzujący rozkład wykładniczy) stosując test Kołmogorowa-Smirnowa na poziomie istotności ?=0,05. W wyniku przeprowadzonych badań wykazano, że w składzie granulometrycznym glukozy krystalicznej otrzymanej na bazie skrobi ziemniaczanej i skrobi pszennej występują istotne różnice. Próbka glukozy pszennej charakteryzuje się mniejszymi kryształami w porównaniu do próbki glukozy ziemniaczanej. W próbce glukozy pszennej frakcja najmniejszych kryształów do 40 žm stanowi ponad 70% całej populacji, podczas gdy w próbce glukozy ziemniaczanej jest to tylko 50% kryształów. Różnice te wpływają na właściwości użytkowe glukozy, takie jak sypkość i podatność na samogranulację.
The paper presents the results of differences in the granulometric composition of crystalline glucose produced on the basis of two raw materials: potato starch and wheat starch. Measurements of geometrical dimensions of the glucose crystals were based on images obtained by shearing interferometry in the transition light using both computer image analysis and analySIS software. The characteristics of granulometric composition was carried out on a population consisting of 2000 crystals. Numerical distribution histograms of the maximum diameter of crystals were created using Statistica 9.0 software. Since the obtained distributions showed signs of exponential distribution, the l parameter ( characteristic of exponential distribution) was selected using the Kolmogorov-Smirnov test at significance level ?=0,05. The resulting research has shown that there are significant differences in the granulometric composition of crystalline glucose obtained on the basis of either potato or wheat starch. A sample of wheat glucose is characterized by smaller crystals as compared to a sample of potato glucose. Thus, in the sample of wheat glucose the fraction of smallest crystals i.e. up to 40 m constitutes over 70% of the total population, whilst in the potato glucose sample only 50% of crystals is found. These differences affect the functional properties of glucose, such as friability and susceptibility to self-granulation.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2010, 1; 36-40
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dendritic Structure Analysis of CMSX-4 Cored Turbine Blades Roots
Autorzy:
Krawczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/355017.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
single-crystalline turbine blades
nickel-base superalloy
dendritic structure
x-ray topography
SEM
Opis:
The microstructure of as-cast cored turbine blades roots, made of the single-crystal CMSX-4 nickel-based superalloy was investigated. Analysed blades were obtained by directional solidification technique in the industrial ALD Bridgman induction furnace. The investigations of the microstructure of blades roots were performed using SEM and X-ray techniques including diffraction topography with the use of Auleytner method. Characteristic shapes of dendrites with various arrangement were observed on the SEM images taken from the cross-sections, made transversely to the main blades axis. The differences in quality of the structure in particular areas of blades roots were revealed. Based on the results, the influence of cooling bores on blades root structure was analysed and the changes in the distribution and geometry of cooling bores were proposed.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 1129-1134
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure Evolution of Ni-Based ODS Superalloy Powders During Horizontal Rotary Ball Milling
Autorzy:
Lee, H.-E.
Kim, Y. S.
Park, J. K.
Oh, S.-T.
Powiązania:
https://bibliotekanauki.pl/articles/355552.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high energy ball milling
Ni-base ODS superalloy
particle and crystalline size
microstructure
Opis:
Microstructure evolution of Ni-based oxide dispersion-strengthened alloy powders with milling time is investigated. The elemental powders having a nominal composition of Ni-15Cr-4.5Al-4W-2.5Ti-2Mo-2Ta-0.15Zr-1.1Y2O3 in wt % were ball-milled by using horizontal rotary ball milling with the change of milling velocity. Microstructure observation revealed that large aggregates were formed in the early stages of ball milling, and further milling to 5 h decreased particle size. The average crystalline size, estimated by the peak broadening of XRD, decreased from 28 nm to 15 nm with increasing milling time from 1 h to 5 h. SEM and EPMA analysis showed that the main elements of Ni and Cr were homogeneously distributed inside the powders after ball milling of 5 h.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1253-1255
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Termicznie przełączane kompozyty ciekłokrystaliczne
Thermally switched PDLC liquid-crystalline composites
Autorzy:
Sułkowski, K.
Kłosowicz, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/208710.pdf
Data publikacji:
2016
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
inżynieria materiałowa
kompozyty ciekłokrystaliczne
efekt termooptyczny
materials engineering
liquid-crystalline composites
thermooptical effect
Opis:
Zbadano właściwości termooptyczne kompozytów typu PDLC, zawierających nematyczne ciekłe kryształy w zakresie widzialnym oraz w bliskiej podczerwieni. Potwierdzono, że warstwa kompozytu może być przełączana, z zadowalającym kontrastem optycznym, od stanu rozpraszającego do transparentnego po osiągnięciu progowego przedziału temperatury przejścia ciekłego kryształu do fazy izotropowej. Kontrast optyczny i wartość przedziału temperaturowego przełączenia zależą od doboru składników mieszaniny ciekłokrystalicznej. Zjawisko może być wykorzystane do konstrukcji szyb o „inteligentnej” transmisji ciepła, w zależności od temperatury zewnętrznej.
The thermooptical properties of conventional polymer-dispersed nematic liquid crystals (PDLC) composites in visual and near IR ranges have been studied. It has been confirmed that the composite film can be switched from the scattering milky state to the transparent state just by reaching a threshold temperature range, namely liquid crystal clearing phase transition to the isotropic one with satisfactory contrast ratio. The optical contrast and switching temperature range can be adjusted by the proper choice of the components of liquid crystalline mixture. This effect could be adopted for a construction of panes with “intelligent” heat transmission.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2016, 65, 1; 57-67
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
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