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    Wyświetlanie 1-17 z 17
    Tytuł:
    Shrinking rural areas as demographic problem areas - the example of Poland and Austria
    Kurczące się obszary wiejskie jako demograficzne obszary problemowe - przykład Polski i Austrii
    Autorzy:
    Wojewódzka-Wiewiórska, A.,
    Wagner, K.,
    Powiązania:
    https://bibliotekanauki.pl/articles/31342196.pdf
    Data publikacji:
    2022
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Źródło:
    Acta Scientiarum Polonorum. Oeconomia; 2022, 21, 3; 33-42
    1644-0757
    Pojawia się w:
    Acta Scientiarum Polonorum. Oeconomia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratygrafia kredy jeziornej ze złoża węgla brunatnego "Szczerców"
    Stratigraphy of lacustrine chalk from the "Szczerców" lignite deposit
    Autorzy:
    Wagner, M.
    Matl, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/183517.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    złoże węgla brunatnego "Szczerców"
    miocen
    kreda jeziorna
    badania stratygraficzne
    lignite deposit Szczerców
    Miocene
    lacustrine chalk
    stratigraphic study
    Opis:
    W złożu węgla brunatnego "Szczerców" wyróżniono dwa ciągłe, różnowiekowe horyzonty skał wapiennych (kredy jeziornej) o sumarycznej grubości do 90 m. Poziom starszy (II) występuje w zachodniej części złoża, głównie w dolnej części kompleksu węglowego. Poziom młodszy (I i la) znany jest z górnej części kompleksu węglowego. Obydwa poziomy rozdziela kilkudziesięciometrowa seria węglowa. Badania malakofauny i palinologiczne potwierdziły zróżnicowanie stratygraficzne wyróżnionych horyzontów kredy jeziornej. Poziom starszy jest dolnomioceński (zona biostratygraficzna MN 4), co odpowiada w schemacie miocenu morskiego (Paratetydy) ottnangowi i karpatowi. Jest to odpowiednik III-rawickiej grupy pokładów węgla. Młodszy poziom kredy jeziornej (I) zaliczono do miocenu środkowego, a jego lokalną górną część do przełomu miocenu środkowego i górnego (zona biostratygraficzna MN 5-6, co odpowiada badenowi i MN 7-8 zaliczanych do sarmatu). Odpowiada to przypuszczalnie II-łużyckiej grupie pokładów węgla na Niżu Polskim.
    Two continuous lacustrine chalk horizons of different age with the total thickness around 90 m were distinguished in the "Szczerców" lignite deposit. The older level (II) occurs in the western part of deposit, particularly in the lower part of a coal complex. The younger level (I and la) is observed in the upper part of the coal complex. The levels are separated by lignite series that is several dozen meters thick. The analysis of malacofauna and palynology confirmed stratigraphic differentiation of the distinguished lacustrine chalk horizons. The older level was described as Lower Miocene that corresponds with Ottnangian and Carpathian in the marine Miocene scheme of Parathetys. Therefore, it is an equivalent to the III-Rawicz Lignite Main Group. The younger level of lacustrine chalk horizons (I) was classified to Middle Miocene and the local upper part of it was assigned to breaching of Middle and Upper Miocene (biostratigraphic zone MN 5-6 that corresponds with Badenian and MN 7-8 that is assigned to Sarmatian). Presumably, it is comparable to the II-Łużyce Lignite Main Group from Polish Lowland.
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2007, 33, 3; 289-315
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Antioxidant Properties of Creams with Berry Extracts by Artificial Neural Networks
    Autorzy:
    Makarova, K.
    Zawada, K.
    Wagner, D.
    Skowyra, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030222.pdf
    Data publikacji:
    2017-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Mh
    33.35.+r
    61.72.Hh
    76.30.-v
    87.64.kh
    87.80.Lg
    Opis:
    Oxidative stress and the excess of free radicals accelerate the ageing process of human skin. The application of skin cream with antioxidant compounds could reduce the damage caused by free radicals. In this work we studied two types of skin creams with extracts from aronia (Aronia melanocarpa), elderberry (Sambucus nigra) and bilberry (Vaccinium myrtillus) because of their high content of anthocyanins, i.e. strong natural antioxidants. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability of the skin creams with berry extracts were studied with ESR spectroscopy. The artificial neural networks were applied to optimize the berry extract concentration and storage time for oil-in-water and water-in-oil creams. Based on experimental results chokeberry and elderberry extracts in oil-in-water cream base revealed higher DPPH radical scavenging ability than in the corresponding water-in-oil. Artificial neural networks predicts maxima of DPPH radical scavenging for 1-week stored elderberry (2.23 mg DPPH/g) and 1-week stored chokeberry (5.84 mg DPPH/g) and bilberry (5.26 mg DPPH/g) 0.76% extracts in oil-in-water creams. The maxima of DPPH radical scavenging for water-in-oil creams were predicted for 6-week stored 0.8% aronia extract, freshly prepared 0.76% bilberry extract and 1-week stored 0.56% elderberry extract. The artificial neural networks predicted values are in good agreement with the experimental values. DPPH-EPR could be combined with artificial neural networks to optimize the extract concentration, and the type of cream base as well as to predict the effect of storage based on a limited number of experiments and samples.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 1; 44-51
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A dynamically adaptive lattice Boltzmann method for thermal convection problems
    Autorzy:
    Feldhusen, K.
    Deiterding, R.
    Wagner, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/331394.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    lattice Boltzmann method
    adaptive mesh refinement
    thermal convection
    incompressible
    metoda siatkowa Boltzmanna
    adaptacyjne zagęszczanie siatki
    konwekcja termiczna
    Opis:
    Utilizing the Boussinesq approximation, a double-population incompressible thermal lattice Boltzmann method (LBM) for forced and natural convection in two and three space dimensions is developed and validated. A block-structured dynamic adaptive mesh refinement (AMR) procedure tailored for the LBM is applied to enable computationally efficient simulations of moderate to high Rayleigh number flows which are characterized by a large scale disparity in boundary layers and free stream flow. As test cases, the analytically accessible problem of a two-dimensional (2D) forced convection flow through two porous plates and the non-Cartesian configuration of a heated rotating cylinder are considered. The objective of the latter is to advance the boundary conditions for an accurate treatment of curved boundaries and to demonstrate the effect on the solution. The effectiveness of the overall approach is demonstrated for the natural convection benchmark of a 2D cavity with differentially heated walls at Rayleigh numbers from 103 up to 108. To demonstrate the benefit of the employed AMR procedure for three-dimensional (3D) problems, results from the natural convection in a cubic cavity at Rayleigh numbers from 103 up to 105 are compared with benchmark results.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 735-747
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methane sorption on bituminous coal - experiments on cuboid-shaped samples cut from primal coal lumps
    Sorpcja metanu na prostopadłościennych próbkach węgla kamiennego
    Autorzy:
    Czerw, K.
    Ziętek, J.
    Wagner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/216214.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
    Tematy:
    węgiel kamienny
    metan
    kinetyki akumulacji
    pęcznienie
    skurcz
    naprężenie
    hard coal
    methane
    kinetics of accumulation
    swelling
    shrinkage
    strain
    Opis:
    The paper reports the results of laboratory experiments concerning the accumulation of methane on two coals of different ranks, low- and medium-, (respectively coal type 32.2 and 34.2 by PN-82/G-97002). The tests were conducted on cuboid-shaped solid coal samples (20 x 20 x 40 mm) cut out of pieces of primal coals with a long axis parallel to the bedding plane and by applying the volumetric method. The changes of external dimensions which occurred during CH4 accumulation (sorption induced strains) and the volume of up-taken gas were measured simultaneously. For every coal-gas system, two kinetics of gas accumulation were determined by applying the pressure progression method, as well as adequate kinetics of CH4 induced strains parallel and perpendicular to the bedding plane. Volumetric strain kinetics were calculated. The additional recovery of methane beside normal exploitation of coal seams pose as one of the possibilities of efficient management and use of both of those energy resources. On the other hand high concentration of methane in coal suggests the possibility of emerging of gas and coal outburst. Therefore the designation of correlations between sorption and induced swelling/shrinkage processes on coal and the understanding of the mechanisms that are the basis of these dependences are some of the most important aspects of ECBM recovery and mining operational safety. The presented study has demonstrated that in case of hard coals, the rank and the petrographic composition are two of the key factors that influence the course of sorption processes and the methane induced swelling/shrinkage of coals. The above conclusion was based on the strong differences in courses of acquired strain and gas capacity kinetic curves.
    Przeprowadzono badania sorpcji metanu na dwóch węglach, nisko- i średniouwęglonym (odpowiednio typ 32.2 i typ 34.2 wg PN-82/G-97002). Eksperymenty zrealizowano metodą objętościową na prostopadłościennych litych próbkach o wymiarach 20 x 20 x 40 mm wyciętych z bryły macierzystej. Równocześnie śledzono towarzyszące procesom sorpcyjnym zmiany zewnętrznych wymiarów próbek węgla. Dla każdego układu wyznaczono dwie kinetyki sorpcji, przy zastosowaniu metody progresji ciśnienia, oraz kinetyki odkształceń w kierunkach prostopadłym i równoległym do uławicenia węgla. Obliczono także kinetyki odkształceń objętościowych próbek. Pozyskiwanie obok samego węgla również metanu z pokładów węglonośnych stanowi jedną z możliwości efektywnego wykorzystania i zagospodarowania obu tych surowców energetycznych. Jednocześnie, wysoka metanonośność złoża oznacza tym samym prawdopodobieństwo wystąpienia zagrożenia wyrzutem gazów i skał. Stąd określenie zależności pomiędzy sorpcją/desorpcją gazów a pęcznienie/kurczeniem się węgla w pokładzie na skutek przebiegu zjawisk sorpcyjnych oraz zrozumienie mechanizmów tych procesów stanowi nieodzowny element zarówno w kwestiach związanych z ECBM, jak i w zakresie bezpieczeństwa eksploatacji kopalń węgla. W pracy wykazano, że w przypadku węgli kamiennych stopień metamorfizmu oraz skład petrograficzny węgla należą do kluczowych czynników determinujących przebieg procesów sorpcyjnych i towarzyszących im odkształceń sorbentu. Podstawę rozważań stanowiły odmienne kinetyki sorpcji i skrajnie różne kinetyki odkształceń wyznaczone dla badanych układów.
    Źródło:
    Gospodarka Surowcami Mineralnymi; 2010, 26, 2; 85-96
    0860-0953
    Pojawia się w:
    Gospodarka Surowcami Mineralnymi
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petrological character of lignite (brown coal) from Badenian salts in the Bochnia Mine (Southern Poland)
    Autorzy:
    Wagner, M.
    Bukowski, K.
    Stochel, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059019.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Bochnia Salt Mine
    Mio cene, pe trog ra phy of brown coal (ortholignite)
    rock salt
    Opis:
    The salt deposit in Bochnia is located in the marginal zone of the Carpathian Foredeep. The salt succession, composed of rock salt deposits, with clay stone, mudstone and zuber interbeds was, in its original location, ca. 80 m thick. The carbonized organic material described herein occurs within three salt units: in the southern salts, in the middle salts, and in the northern salts. There are two petrographic forms of coal in the Bochnia rock salt succession: xylite and gelitic coal. Xylites are fragments of fossil wood. Externally, xylite demonstrates a fibrous texture, and can be splintered along the fissility with uneven transverse fractures. The fragments are strongly gelified and show a zonal structure: their internal parts are made of highly cracked textinite, although the external part of the xylite fragments is built of ulminite. The gelitic coal was found in the form of lenticles, formed exclusively of euulminite. Their main mineral components include metasideronatrite (Na242
    Źródło:
    Geological Quarterly; 2010, 54, 4; 439-448
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeotectonic cross-sections through the Mid-Polish Trough
    Autorzy:
    Wagner, R.
    Leszczyński, K.
    Pokorski, J.
    Gumulak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059903.pdf
    Data publikacji:
    2002
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Mid-Polish Trough
    Zechstein-Mesozoic sedimentary cover
    subsidence
    salt structures
    Late Cretaceous inversion
    Opis:
    The Late Permian and Mesozoic evolution of the Mid-Polish Trough is analysed using a set of palaeotectonic cross-sections which are constrained by regional integrated depth-converted reflection seismic profiles. Results support the concept that the central and NW part of the Mid-Polish Trough can be subdivided into a Pomeranian and a Kuiavian segment. The Pomeranian segment is characterised by lower subsidence and a shallower depth to the base of the Zechstein (3500-4000 m) as compared with the Kuiavian segment. The Pomeranian basin was characterised by a nearly symmetrical structure and a single depocentre. In Kujawy, the basin displays a more complex structure with several local depocentres. In the Pomeranian segment, salt structures are poorly developed (salt pillows). These formed relatively late: during the latest Cretaceous and Early Paleocene. In the Kuiavian segment, salt structures include also salt diapirs which began to form at the end of the Muschelkalk, and were active later throughout Mesozoic times, as evidenced by lateral facies and thickness changes. During end Cretaceous and Paleocene basin inversion, the base of the Zechstein was uplifted by 3000-4000 m in the Kuiavian segment and by 2000-3000 m in the Pomeranian segment. The transition zone between the Pomeranian and Kuiavian segments, located in the area between Piła and Toruń, displays mixed features in its structure and geological evolution. Subsidence of the Mid-Polish Trough was controlled by multiple extensional pulses during which pre-existing crustal-scale faults were reactivated. Similarly, inversion of the Mid-Polish Trough involved reactivation of crustal faults. Segmentation of the Mid-Polish Trough can be related to factors including differences in its basement composition.
    Źródło:
    Geological Quarterly; 2002, 46, 3; 293-306
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fungi colonizing roots of zucchini (Cucurbita pepo L. var. giromontina) plants and pathogenicity of Fusarium spp. to zucchini seedlings
    Grzyby zasiedlające korzenie roślin cukinii (Cucurbita pepo L. var. giromontina) oraz patogeniczność grzybów rodzaju Fusarium dla siewek cukinii
    Autorzy:
    Jamiolkowska, A.
    Wagner, A.
    Sawicki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/26981.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    fungi
    root
    zucchini
    Cucurbita pepo var.giromontina
    plant root
    pathogenicity
    Fusarium
    seedling
    root rot
    stem base rot
    Opis:
    Zucchini is a very valuable vegetable, easy to grow both in the field and under covers but it is often attacked by soil-borne fungi. The investigations were carried out in a farm near Lublin where three zucchini cultivars: Astra, Atena and Soraya, were grown in a tunnel and in the field in 2008-2009. Plants with stem and root rot were collected for laboratory tests. Mycological analysis showed that the predominant fungi were F. culmorum, F. equiseti and F. oxysporum. More Fusarium colonies were isolated from the roots of zucchini grown in the tunnel. In the pathogenicity test, all tested isolates of F. culmorum, F. equiseti and F. oxysporum proved to be pathogenic to zucchini seedlings, causing stunting, stem and root rot. The highest disease index was noticed in the combination with F. culmorum isolate fck61.
    Źródło:
    Acta Agrobotanica; 2011, 64, 1
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Proterozoic anthracite coals from the Hornsund area, south Spitsbergen
    Autorzy:
    Birkenmajer, Krzysztof
    Frankiewicz, Jerzy K.
    Wagner, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/2052756.pdf
    Data publikacji:
    1992
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Spitsbergen
    Late Proterozoic
    anthracite coal
    Źródło:
    Polish Polar Research; 1992, 13, 2; 71-90
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tertiary coal from the Lions Cove Formation, King George Island, West Antarctica
    Autorzy:
    Birkenmajer, Krzysztof
    Frankiewicz, Jerzy K.
    Wagner, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/2052835.pdf
    Data publikacji:
    1991
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic
    Tertiary
    brown coal
    Źródło:
    Polish Polar Research; 1991, 12, 2; 229-241
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revitalization and preservation of biodiversity. Focus on water bodies in the Cracow region
    Autorzy:
    Wagner, Aleksandra
    Gholami, Ahmad
    Maletz, Katharina
    Talmo, Ina K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064416.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    pond
    revitalization
    birds
    biodiversity loss
    staw
    akwen wodny
    rewitalizacja
    ptaki
    różnorodność biologiczna
    Opis:
    The studies included 2 water bodies in Cracow (Kraków), 6 water bodies in the commune of Zabierzów (Cracow County) and 4 in the commune of Niepołomice (Wieliczka County). The studies were carried out in June 2018 and May 2019. The ways on management of the water bodies were compared. Problems related to revitalization were identified. One of these problems is the preservation of biodiversity. In some cases revitalization reduces biodiversity. This can happen due to the liquidation or limitation of the reed bed zone. Such a situation was observed in the water bodied of Zelków and Karniowice (com. Zabierzów). Both have ornamental functions now. Removal of most of reed does not disturb mallards (Anas platyrhynchos), but makes it impossible to nest for other birds such as moorhen (Galinula chloropus). Moorhens were observed in two former fish ponds in Staniątki (com. Niepołomice) and in the pond of the Kaczeńcowa street. In one of them revitalization caused the diminishing of the water area, but did not change the character of the water body. Bird species were recorded at water bodies.
    Źródło:
    New Trends in Production Engineering; 2019, 2, 1; 496--504
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine ecogeology in semi-closed basin: case study on a threat of geogenic pollution of the southern Baltic Sea (Polish Exclusive Economic Zone)
    Autorzy:
    Sokołowski, A.
    Sokołowski, J.
    Pokorski, J.
    Jaworowski, K.
    Wagner, R.
    Modliski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059068.pdf
    Data publikacji:
    2010
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Źródło:
    Geological Quarterly; 2010, 54, 2; 267-288
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of monitoring strategies and reference data of the German Environmental Specimen Banking Program
    Autorzy:
    Paulus, M.
    Bartel, M.
    Klein, R.
    Nentwich, K.
    Quack, M.
    Teubner, D.
    Wagner, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/147782.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    environmental specimen banking
    effect monitoring
    reference system
    critical tissue concentration
    bioaccumulation
    biometric specimen characterization
    Opis:
    The constitution of the German Environmental Specimen Bank (ESB) has started in 1985, subsequent to a successful pilot study concerning the feasibility. Since that time, a multitude of technological and methodical standards have been developed, which allow for a high quality of the storage-samples and of the specimen characterization. While the storage-samples are kept for retrospective analysis, by now, already comprehensive data on the material-developing in the environment are available due to a real time monitoring of selected environmental chemicals over a period of up to twenty years. Thus, spatial and temporal trends can be described. Since the state of knowledge on critical tissue concentrations in the sublethal range is extremely low at present, it is however not possible to accomplish a direct assessment of relevancy of the substance concentrations. Hence, within the scope of the German ESB Program, the following strategies on assessment of relevancy are observed: use of biomarkers, histopathological examinations, biometric specimen characterization, use of ecological indicator groups, and development of a reference system with analytical and biometric data. Thus, for example endocrine effects in male breams in the river Saar, which correlate directly to operational discharges from municipal sewage plants, could be detected. By histopathological examinations, fibrotic and necrotic tissue adaptations on the gonads had been ascertained cumulatively, which unambiguously imply a restricted fertility of the male breams. In the river Rhine, an improved growth along the timeline could be described on the basis of biometric characterization of breams, which is regarded as rate for the reaction to all structural and material changes in the water body. Presently, with the development of a reference system based on the data collected in the scope of the Environmental
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 53-58
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy
    Autorzy:
    Zhang, B.
    Wagner, H.
    Büchsenschütz-Göbeler, M.
    Luo, Y.
    Küchemann, S.
    Arnold, W.
    Samwer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/352901.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    amorphous materials
    potential energy landscape
    internal friction
    atomic force acoustic microscopy
    Opis:
    For the past two decades, atomic force acoustic microscopy (AFAM), an advanced scanning probe microscopy technique, has played a promising role in materials characterization with a good lateral resolution at micro/nano dimensions. AFAM is based on inducing out-of-plane vibrations in the specimen, which are generated by an ultrasonic transducer. The vibrations are sensed by the AFM cantilever when its tip is in contact with the material under test. From the cantilver’s contactresonance spectra, one determines the real and the imaginary part of the contact stiffness k*, and then from these two quantities the local indentation modulus M' and the local damping factor Qloc-1 can be obtained with a spatial resolution of less than 10 nm. Here, we present measured data of M' and of Qloc-1 for the insulating amorphous material, a-SiO2. The amorphous SiO2 layer was prepared on a crystalline Si wafer by means of thermal oxidation. There is a spatial distribution of the indentation modulus M' and of the internal friction Qloc-1. This is a consequence of the potential energy landscape for amorphous materials.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 9-12
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Special X-Ray Silicon Detectors for Medical Applications
    Autorzy:
    Halmagean, E.
    Wagner, D.
    Tsoi, E.
    Misiakos, K.
    Ohanisian, M.
    Veron, A.
    Cimpoca, V.
    Lazarovici, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963381.pdf
    Data publikacji:
    1997-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.85.-m
    61.80.Cd
    Opis:
    The paper presents some results concerning the technology and behaviour of X-ray silicon detectors intended for controlling low radiation levels in interventional cardiology. An improved planar process was used for obtaining large area guard-ring test structures. The electrical characteristics, their modification after exposure to radiation and the results of spectroscopic X-ray measurements are discussed.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 4; 789-792
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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