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Wyszukujesz frazę "Gajewski, L." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Key Courses of Academic Curriculum Uncovered by Data Mining of Students Grades
Autorzy:
Gajewski, Ł.
Chołoniewski, J.
Hołyst, J.
Powiązania:
https://bibliotekanauki.pl/articles/1398901.pdf
Data publikacji:
2016-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.-s
89.65.Ef
Opis:
Learning is a complex cognitive process that depends not only on an individual capability of knowledge absorption but it can be also influenced by various group interactions and by the structure of an academic curriculum. We have applied methods of statistical analyses and data mining (principal component analysis and maximal spanning tree) for anonymized students' scores at Faculty of Physics, Warsaw University of Technology. A slight negative linear correlation exists between mean and variance of course grades, i.e. courses with higher mean scores tend to possess a lower scores variance. There are courses playing a central role, e.g. their scores are highly correlated to other scores and they are in the centre of corresponding maximal spanning trees. Other courses contribute significantly to students' score variance as well to the first principal component and they are responsible for differentiation of students' scores. Correlations of the first principal component to courses' mean scores and scores variance suggest that this component can be used for assigning ECTS points to a given course. The analysis is independent of declared curricula of considered courses. The proposed methodology is universal and can be applied for analysis of students' scores and academic curriculum at any faculty.
Źródło:
Acta Physica Polonica A; 2016, 129, 5; 1071-1076
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Rays Response of Diamond Detectors Constructed Using Diamond Layers Produced by Low Power Microwave Chemical Vapor Deposition Reactor
Autorzy:
Kordyasz, A.
Bednarek, A.
Kowalczyk, M.
Tarasiuk, J.
Kulczycka, E.
Teodorczyk, M.
Gajewski, M.
Kordyasz, Ł.
Rowiński, O.
Lamparski, K.
Karwański, Ł.
Lipczewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/1402641.pdf
Data publikacji:
2015-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.75.-d
81.15.Gh
29.40.Vj
07.85.Fv
Opis:
The low power reactor for microwave chemical vapor deposition process is described. The rotating Mo holder of 12 mm diameter and 6 mm height with the diamond substrate was heated by 2.45 GHz microwaves to temperature about 800°C in the range of (1.5-7)% $CH_{4}//H_{2}$ mixture to create plasma at pressure 70 Tr. Stabilization of the holder temperature was performed by optical observation of radiation from the holder followed by adjusting of the magnetron power. Diamond detectors are produced using microwave chemical vapor deposition process grown on single crystal diamond high pressure high temperature Sumimoto substrates, [100] oriented. The response of diamond detectors for X-rays has been measured in the current mode using medical X-rays tube. The linear response of the diamond detector current versus X-ray tube current (dose) is presented.
Źródło:
Acta Physica Polonica A; 2015, 127, 5; 1555-1559
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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