Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Duda, Marek" wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-4 z 4
    Tytuł:
    Próby klasyfikowania chondrytów zwyczajnych przez zastosowanie spektroskopii mössbauerowskiej
    Attempts of classification of ordinary chondrites by application of Mössbauer spectroscopy
    Autorzy:
    Gałązka-Friedman, Jolanta
    Woźniak, Marek
    Duda, Przemysław
    Jakubowska, Martyna
    Bogusz, Patrycja
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1032381.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Mössbauer spectroscopy
    classification of meteorites
    ordinary chondrites
    Opis:
    Mössbauer spectra of equilibrated ordinary chondrites consist of two sextets due to magnetically ordered iron present in metallic phases and troilite and two doublets due to paramagnetic iron present in olivines and pyroxenes. The Mössbauer spectral areas of the different mineralogical phases in meteorites are proportional to the number of iron ions present in olivines, pyroxenes, metallic phase and troilite. This property of Mössbauer spectra was the basis for constructing various methods for the classification of ordinary chondrites. Review of these methods will be presented.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2019, 10; 23-28
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda 4M – nowe zastosowanie spektroskopii mössbauerowskiej w klasyfikacji zrównoważonych chondrytów zwyczajnych
    4M method – the new application of Mössbauer spectroscopy for classification of equilibrated ordinary chondrites
    Autorzy:
    Woźniak, Marek
    Karwowski, Łukasz
    Gałązka-Friedman, Jolanta
    Duda, Przemysław
    Jakubowska, Martyna
    Bogusz, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/1033156.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    4M method
    Cluster Analysis
    Mahalanobis distance
    Multidimensional Discriminant Analysis
    Mössbauer spectroscopy
    Principal Components Analysis
    meteorites
    meteorites classification
    ordinary chondrites
    Opis:
    The 4M method aims to determine the type of equilibrated ordinary chondrite only on the basis of the Mössbauer spectrum of the investigated meteorite. Mössbauer spectrum of non-weathered ordinary chondrite is comprised of four sub-spectra: two doublets and two sextets. One of the doublets consists of a signal from iron present in olivine and the other consists of a signal from iron present in pyroxene. Sextets on the other hand, contain signals from magnetically ordered iron. One sextet is related to the metallic phase (kamacite, taenite), whereas the second is related to troilite. A third of doublets, which emerges in weathered ordinary chondrites, is related to products of the oxidation of iron present in metallic phase. The spectral areas of olivine, pyroxenes, metallic phase and troilite, which were obtained from Mössbauer spectrum are proportional to the number of iron atoms present in relevant mineral phases. Some Mössbauer groups were inspired by this fact to construct different methods to determine the type (H, L, or LL) of investigated meteorites (Gałązka-Friedman et al. 2019, Hyp. Inter. 241(1)). However, these methods, based on subjective criteria, were only qualitative. Our group elaborated a quantitative method, which is based on objective criteria. We called it the "4M method" (where M are derived from meteorites, Mössbauer spectroscopy, multidimensional discriminant analysis (MDA), Mahalanobis distance) (Woźniak et al. 2019). This method was using only the Mössbauer experimental data, to which it applied advanced statistical methods. The base, which was created from Mössbauer data, consisted of three clusters H, L, LL. These clusters were constructed with sets of 4-dimensional vectors. The vectors are comprised of spectral areas of Mössbauer spectrum: ol (value proportional to iron present in olivine), pyr (value proportional to iron present in pyroxene), met (value proportional to iron present in metallic phase), tr (value proportional to iron present in troilite). To determine the type of investigated ordinary chondrite, its ol, pyr, met and tr values with average values of variables obtained for clusters H, L and LL need to be compared. The comparison can be performed with the use of MDA and Mahalanobis distance. Once Mahalanobis distance of the investigated meteoriteis is known, the level of similarity to three types of ordinary chondrites can be calculated. Examples of such calculations were performed for seven ordinary chondrites: Goronyo, Carancas, New Concord, NWA 7733, Leoncin, Sołtmany and Pułtusk. They were made with the use of the new base composed of 62 non-weathered ordinary chondrites. All results obtained with the 4M method yielded results consistent with traditional mineralogical methods.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2020, 11; 125-140
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odróżnianie próbek prawdziwych meteorytów od kamiennych próbek meteorytopodobnych – ważna rola spektroskopii mössbauerowskiej
    Distinguishing between real and false meteorite samples – the important role of Mössbauer spectroscopy
    Autorzy:
    Bogusz, Patrycja
    Gałązka-Friedman, Jolanta
    Brzózka, Katarzyna
    Jakubowska, Martyna
    Woźniak, Marek
    Karwowski, Łukasz
    Duda, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/2034025.pdf
    Data publikacji:
    2022-03
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    ordinary chondrites
    meteorites
    Leoncin
    Pu³tusk
    Kheneg Ljouâd
    Campos Sales
    Julin
    Mössbauer spectroscopy
    4M method
    Opis:
    Four stony pieces were delivered to our laboratory for checking if they are fragments of meteorites: first sample (sample No. 1) was a fragment of a rock that fell near Leoncin in Poland, second sample (sample No. 2) was a fragment of a rock found also in Poland in the vicinity of Pultusk, third sample (sample No. 3) was a meteorite specimen bought on the meteorite exchange and fourth sample (sample No. 4) was a stone object whose decline was observed in Europe. We obtained mössbauer spectra of the delivered samples. The mössbauer spectrum of sample No. 1 is very similar to the spectrum of ordinary chondrite of type LL. Comparison of the mössbauer spectrum of sample No. 2 with mössbauer spectrum of Pu³tusk meteorite showed very large differences. In the spectrum of sample No. 3, a clear signal from iron-nickel alloy and troilite can be observed. These observations indicate that it is an object of extraterrestrial origin. Mössbauer spectrum of Sample No. 4 is similar to the spectrum of terrestrial magmatic rocks. Based on these spectrum we cannot clearly determine where the examined object comes from. This work demonstrates the usefulness of Mössbauer spectroscopy in recognizing samples that are fragments of meteorites.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2022, 13; 27-36
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania mössbauerowskie trzech chondrytów zwyczajnych typu H i trzech chondrytów zwyczajnych typu LL – wyznaczanie niepewności powierzchni spektralnych
    Mössbauer studies of three ordinary chondrites type H and three ordinary chondrites type LL – uncertainty of the determination of spectral areas
    Autorzy:
    Jakubowska, Martyna
    Buczek, Aleksandra
    Gwiździel, Katarzyna
    Djellouli, Adam
    Nowak, Filip
    Woźniak, Marek
    Gałązka-Friedman, Jolanta
    Karwowski, Łukasz
    Duda, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/1032384.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Bassikounou
    Buzzard Coulee
    Kilabo
    Mössbauer spectroscopy
    NWA 4841
    NWA 6287
    Zag
    ordinary chondrites
    Opis:
    Mössbauer 57Fe measurements of three ordinary chondrites type H and of three ordinary chondrites type LL were performed at room temperature. The spectral areas were fitted using the “Recoil” program (Lagarec i in. 1998). Fitting was repeated three times which allowed us to determinate the differences between the results of fits performed by different persons.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2019, 10; 34-39
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies