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    Wyświetlanie 1-14 z 14
    Tytuł:
    Wybrane procedury przetwarzania danych w systemie geoinformacyjnym złóż surowców skalnych
    Selected procedures of data processing in the geoinformation system for rock mineral deposits
    Autorzy:
    Blachowski, J.
    Górniak-Zimroz, J.
    Duczmal, M.
    Nowacka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/170806.pdf
    Data publikacji:
    2011
    Wydawca:
    Poltegor-Instytut Instytut Górnictwa Odkrywkowego
    Tematy:
    surowce skalne
    system informacji geograficznej
    GIS
    system geoinformacyjny
    rock materials
    geographic information systems
    geoinformation system
    Opis:
    W artykule przedstawiono zaawansowanie prac nad budową Pilotowego systemu geoinformacyjnego złóż surowców skalnych realizowanego w ramach zadania 5 projektu Strategie i scenariusze technologiczne zagospodarowania i wykorzystania złóż surowców skalnych. Opisano główne założenia techniczne i funkcjonalne systemu, źródła danych, tematyczne bazy danych, użytkowników oraz testowane narzędzia i procedury przetwarzania danych w systemie. Są to zaawansowane funkcje takie jak, narzędzie do zdalnej edycji danych przestrzennych i opisowych dotyczących złóż, terenów i obszarów górniczych oraz model przetwarzania danych przestrzennych pozwalający na uproszczoną waloryzację złóż pod kątem środowiskowym, planistycznym, geologiczno-złożowym i górniczym. A także grupa narzędzi do wyszukiwania danych według zadanego kryterium lub lokalizacji, identyfikacji obiektu, pomiarów, itp. W fazie opracowania są opcje udostępniania modeli 3D oraz wykonywania obliczeń.
    In the paper the current status of the development of the Pilot geoinformation system for rock minerals carried out within the project Strategies and technological scenarios of rock mineral deposit development has been presented. The main technical and functional foundations of the system, data sources, thematic data bases, users and the tested tools and procedures of data processing in the system. These include advanced functions such as remote editing of spatial and attributive data concerning deposits, mining grounds and mining areas as well as geoprocessing model for simplified valorization of deposits in terms of environmental, spatial planning, geological and mining criteria. As well as a group of tools for searching the system’s databases in terms of a selected criteria, identification, measurements, etc. Additional options such as 3D models of objects and calculations are in the early development phase.
    Źródło:
    Górnictwo Odkrywkowe; 2011, 52, 6; 60-65
    0043-2075
    Pojawia się w:
    Górnictwo Odkrywkowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Secondary Radiation Field Effects for the CEM Spectra
    Autorzy:
    Ruebenbauer, K.
    Błachowski, A.
    Żukrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537767.pdf
    Data publikacji:
    2010-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    82.80.Ej
    23.20.Nx
    42.40.Kw
    Opis:
    The secondary resonant radiation field and resonant absorption thickness effects on the Conversion Electron Mössbauer Spectroscopy spectra are analyzed for highly enriched resonant targets. It is shown that secondary field effect is important for the thick α-Fe foil enriched in the resonant isotope. Even for the polycrystalline sample traces of the coherent resonant field have been detected as the distortion of lines. Secondary field is discussed in detail. Suitable approximations to treat spectra originating from targets with significant resonant thickness developing secondary field composed of the incoherent and coherent parts are introduced. Finally, the formalism is applied to the high quality spectrum recorded for the enriched iron foil and correlation between contribution due to the secondary field and experimental line shape is investigated.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 6; 953-961
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Roughness Method to Estimate Fractal Dimension
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808085.pdf
    Data publikacji:
    2009-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.45.Df
    61.43.Hv
    Opis:
    A method based on the pattern roughness was introduced for determination of the fractal dimension and tested for fractals like the Sierpiński carpet, the Sierpiński triangle, standard Cantor set, the Menger sponge and the Sierpiński tetrahedron. It was tested for non-fractal pattern like two- and four-dimensional gray scale random dust as well. It was found that for all these patterns the Hausdorff dimension is reproduced with relatively high accuracy. Roughness method is based on simple, fast and easy to implement algorithm applicable in any topological dimension. It is particularly suited for patterns being composed of the hierarchy of structures having the same topological dimension as the space embedding them. It is applicable to "fuzzy" patterns with overlapping structures, where other methods are useless. It is designed for pixelized structures, the latter structures resulting as typical experimental data sets.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 3; 636-640
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer study of deformation induced martensitic phase transformation in duplex steel
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Jura, J.
    Bonarski, J.
    Baudin, T.
    Penelle, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/148876.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    duplex steel
    martensitic transformation
    Mössbauer spectroscopy
    plastic deformation
    Opis:
    Samples of cold rolled UR45N austenitic-ferritic duplex steel with cold rolling reduction ranging from 0% to 80% were investigated in the form of foils and powders by means of Mössbauer transmission spectroscopy. It was found that cold rolling has a minor effect on the martensitic transformation even at high reductions in the material under investigation. On the other hand, powdering process induces strong martensitic phase transformation, i.e., about 25% of austenite transforms into martensite during powdering. High rolling reductions as well as powdering reduce an average hyperfine magnetic field at iron by about 1 T, while annealing at about 430°C increases this field by about 3 T.
    Źródło:
    Nukleonika; 2003, 48,suppl.1; 9-12
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer spectrometer MsAa-3
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/148201.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Mössbauer spectrometer
    layout
    performance tests
    laser calibration
    Opis:
    The paper is aimed at the description of the newly developed Mössbauer spectrometer MsAa-3. The spectrometer MsAa-3 consists of a high quality gamma-ray spectrometer including either a proportional gas detector head or a scintillation detector head, a transducer driving system including the transducer, data storage system, and data communication system based on the TCP/IP protocol. Additionally, the Michelson-Morley interferometer is provided for precise calibration of the transducer velocity. The spectrometer is equipped with an integrated simple temperature controller. All the essential functions are remotely controlled over the TCP/IP link allowing for the spectrometer set-up as the stand-alone unit in the computer network, e.g. on the Internet. External gamma-ray detectors or external complete nuclear blocks could be used as well. The spectrometer is equipped with software allowing for setting all the functions, to perform on-line control, and retrieve data. The Mössbauer data processing software MOSGRAF is enclosed as well. The latter software allows for the calculation of the variety of velocity reference functions.
    Źródło:
    Nukleonika; 2007, 52, supl. 1; 7-12
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interplay Between Spin Density Wave and Superconductivity in `122 Iron Pnictides: $\text{}^{57}Fe$ Mössbauer Study
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Żukrowski, J.
    Bukowski, Z.
    Matusiak, M.
    Karpinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1431157.pdf
    Data publikacji:
    2012-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.Xa
    75.30.Fv
    76.80.+y
    Opis:
    Iron-based superconductors $Ba_{0.7}Rb_{0.3}Fe_{2}As_{2}$ and $CaFe_{1.92}Co_{0.08}As_{2}$ of the `122' family have been investigated by means of the 14.41-keV Mössbauer transition in $\text{}^{57}Fe$ versus temperature ranging from the room temperature till 4.2 K. A comparison is made with the previously investigated parent compounds $BaFe_{2}As_{2}$ and $CaFe_{2}As_{2}$. It has been found that Mössbauer spectra of these superconductors are composed of the magnetically split component due to development of spin density wave and non-magnetic component surviving even at lowest temperatures. The latter component is responsible for superconductivity. Hence, the superconductivity occurs in the part of the sample despite the sample is single phase. This phenomenon is caused by the slight variation of the dopant concentration across the sample (crystal).
    Źródło:
    Acta Physica Polonica A; 2012, 121, 4; 726-729
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impurity Effect on Charge and Spin Density in α-Fe - Comparison between Cellular Model, Ab Initio Calculations and Experiment
    Autorzy:
    Błachowski, A.
    Wdowik, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506568.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Bb
    31.15.A-
    76.80.+y
    Opis:
    The influence of the impurity substituted on the regular site in the BCC α-Fe on charge and spin density on the adjacent iron nuclei has been studied by the ab initio method within framework of the full-potential linearized augmented plane-wave formalism applying density functional theorem. Results were correlated with the phenomenological cellular atomic model of Miedema and van der Woude and with the Mössbauer spectroscopy experimental data.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 24-27
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy
    Autorzy:
    Malczewski, D.
    Jeleń, M.
    Żaba, J.
    Błachowski, A.
    Ruebenbauer, K.
    Dziurowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146452.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Opis:
    The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes, SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts and pillow lavas from the Kaczawa metamorphic using 57Fe Mössbauer spectroscopy. Based on the preliminary results, the Fe3+/Fe2+ ratio in the samples was determined.
    Źródło:
    Nukleonika; 2017, 62, 2; 145-148
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GIS-based method for wind farm location multi-criteria analysis
    Autorzy:
    Szurek, M.
    Blachowski, J.
    Nowacka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89210.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    multicriteria analysis
    wind farm location
    AHP
    WLC
    Opis:
    The paper presents a GIS-based method for selecting an optimum location of wind farm on the case study of the Prusice commune in Lower Silesia (SW Poland). The adopted multi-criteria approach utilises the Analytic Hierarchy Process (AHP) and Weighted Linear Combination (WLC) methods to determine weights of sitting criteria (factors and constraints), and to develop a composite suitability map from single-factor maps representing these criteria. The adopted sitting criteria have been identified based on literature review, and include: technical, spatial, social and environmental aspects of wind farm development, and also address specific geographical constrains of this part of Poland. The most suitable and suitable areas have been presented on a wind farm suitability map for the commune. The area size of the largest suitable spots (14) varies from 10 to 64 ha. The proposed method and the results of this work can be used to support sustainable spatial policy and spatial development on all levels of public administration related to renewable resources use.
    Źródło:
    Mining Science; 2014, 21; 65-81
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Early Design Stage of the MsAa-4 Mössbauer Spectrometer
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Żukrowski, J.
    Górnicki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811903.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    07.85.Nc
    29.85.Ca
    Opis:
    Entirely new Mössbauer spectrometer MsAa-4 is currently under design and construction. New features as compared to the basic features of the previous generation MsAa-3 spectrometer could be summarized as follows. Completely digital processing of the γ-ray detector signal beyond the Gaussian shape filter/amplifier is to be implemented. The spectrometer is going to be able to accommodate external multiple detector heads. One could collect simultaneously up to 128 γ-ray spectra in 16384 channels of 32-bit each and up to 512 Mössbauer spectra in 4096 channels of 32-bit each provided the proper external multiple detector head is used. The count-rate per single detector is limited to about $10^5$ counts per second total. Improved precision of the reference function from 12-bit to 16-bit is to be provided. The reference function is stored in 8192 channels per complete cycle. Addition of the random noise to the reference corner prism of the Michelson-Morley calibration inteferometer is to be introduced to avoid spurious fringes due to the phase lock-up. Integrated universal temperature controller being able to use variety of the temperature sensors is to be interconnected with the proper spectrometer. The spectrometer is now a stand-alone network device as it is equipped with the Ethernet connection to the outside world. Modular design and use of the strict standards allows easy reconfiguration for other applications than the Mössbauer spectroscopy.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6; 1707-1713
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal structure and Mössbauer study of FeAl2O4
    Autorzy:
    Jastrzębska, I.
    Szczerba, J.
    Stoch, P.
    Błachowski, A.
    Ruebenbauer, K.
    Prorok, R.
    Śnieżek, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/147676.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    FeAl2O4
    hercynite
    Mössbauer spectroscopy
    spinel
    Opis:
    In this work the synthesis of hercynite from Fe2O3 and Al2O3 powders was carried out by arc-melting method under the protective argon atmosphere. The obtained material was characterized with the use of powder X-ray diffractometry (XRD) and Mössbauer spectroscopy (MS). A Mössbauer effect in hercynite obtained by the arc-melting method indicated the cations distribution in the spinel structure among the tetrahedral and octahedral interstices. The presence of Fe2+ ions was detected in both tetrahedral and octahedral sites while Fe3+ ions occupied only the octahedral interstices. The approximate formula of the obtained iron-aluminate spinel was as follows (Fe2+ 0.77Al3+0.23)(Fe3+0.07Fe2+0.05Al0.88)2O4.
    Źródło:
    Nukleonika; 2015, 60, 1; 47-49
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge and Spin Density Perturbation on Iron Nuclei by Non-Magnetic Impurities Substituted on the Iron Sites in α-Fe
    Autorzy:
    Błachowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811591.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Bb
    76.80.+y
    Opis:
    The paper is aimed at the review of the charge and spin density perturbation on the iron nucleus in the bcc iron-based binary alloys containing as the impurity either 4d (Nb, Mo, Ru, Rh, Pd) or 5d (Os, Ir, Au) metals. Additionally, Ga was used as such impurity as well. Measurements were performed by means of the $\text{}^{57}Fe$ transmission Mössbauer spectroscopy at room temperature. Powder X-ray diffraction data for alloys investigated show linear dependence of the lattice constant versus impurity concentration. The Mössbauer data were treated assuming random distribution of the impurity over the iron sites and additive effect for the charge density perturbation, and additive in the algebraic sense effect for the corresponding spin density perturbation. Hence, the effect of impurity depends solely on the distance between impurity and the iron nucleus under above assumptions. It has been found that impurities being further away than a third or in some cases as the second neighbor do not contribute directly to the charge and spin perturbation. On the other hand, they have usually some minor effect on the average charge and spin density. Generally, the perturbation to either charge or spin density has some oscillatory character versus distance from the impurity. The phase and period of the charge oscillation is vastly different from the phase and period of the spin oscillation in the majority of cases. Substitution of the impurities with the increasing number of 4d or 5d electrons leads to the lowering of the electron density on the iron nucleus and causes decreased band spin density on this nucleus. Subsequent impurities donate more and more d-type electrons to the band, and the latter screen more and more effectively s-like electrons. Hence, the density of the s-like electrons on the iron nucleus diminishes. Impurities with 5d electrons have generally stronger effect on the charge and spin density perturbation than impurities with 4d electrons.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6; 1563-1571
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge and spin density perturbation on iron atom due to osmium impurity in metallic iron
    Autorzy:
    Błachowski, A.
    Ruebenbauer, K.
    Żukrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147245.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Mössbauer spectroscopy
    charge and spin density
    impurities in metal
    Opis:
    Samples of natural alfa-Fe doped randomly with Os impurities up to about 9 at.% have been investigated by means of the 14.41 keV Mössbauer absorption spectroscopy of 57Fe vs. Os concentration and at room temperature. It has been found that the nearest neighbor single Os impurity reduces hyperfine magnetic field on the iron nucleus by 3.97 T, while the second neighbor single Os impurity decreases this field by 1.11 T. More distant impurities slightly increase iron hyperfine field. There are no discernible effects of the Os-Os interaction on the magnetic field seen by iron. On the other hand, the electron charge density on the iron nucleus is increased by the nearest neighbor Os atom as seen via changes in the isomer shift, i.e. via changes in the spectral shift. The second neighbor impurity has the opposite effect on the charge density. More distant impurities tend to decrease the charge density as well. The effect of the first and second neighbor impurities decreases with increasing overall Os concentration indicating some Os-Os interaction influencing a charge density of the conduction electrons seen on the iron nucleus.
    Źródło:
    Nukleonika; 2004, 49,suppl.3; 67-70
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of GIS methods in assessing effects of mining activity on surface infrastructure
    Zastosowanie metod GIS w ocenie wpływu działalności górniczej na infrastrukturę na powierzchni
    Autorzy:
    Blachowski, J.
    Chrzanowski, A.
    Szostak-Chrzanowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/219905.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    górnictwo
    wskaźniki deformacji
    szkody górnicze
    GIS
    algebra mapy
    mining
    deformation parameters
    mining damage
    map algebra
    Opis:
    Tilt (T), curvature (K) and horizontal strain (ε) in ground subsidence troughs are the basic deformation parameters, which are used in the assessment of mining effects on surface infrastructure. The parameters can be determined from mathematical functions describing the continuous displacement field. The latter can be obtained by the least squares fitting of selected displacement functions to results of three-dimensional monitoring of horizontal and vertical displacements at discrete points. A methodology based on spatial data modelling in Geographic Information Systems (GIS) facilitates the above process as demonstrated on the example of a mining area in Canada. Polish guidelines regarding classification of mining risk categories based on the values of these parameters have been used in the example.
    Nachylenie (T) , krzywizna (K) oraz odkształcenie poziome (ε) w niecce obniżeniowej to podstawowe wskaźniki używane do oceny wpływu działalności górniczej na infrastrukturę na powierzchni. Wskaźniki te można wyznaczyć poprzez wpasowanie odpowiedniej funkcji matematycznej opisującej pole przemieszczeń. Pole to można otrzymać poprzez wpasowanie wybranych funkcji przemieszczeń do wyników pomiarów (3D) poziomych i pionowych przesunięć punktów sieci obserwacyjnej. Metodyka oparta na modelowaniu danych przestrzennych w systemach informacji geograficznej (GIS) wspomaga ten proces co zademonstrowano na przykładzie terenu górniczego w Kanadzie. Wykorzystano polskie wytyczne w zakresie kategorii terenów górniczych oparte na wartościach tych wskaźników.
    Źródło:
    Archives of Mining Sciences; 2014, 59, 2; 307-321
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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