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Wyświetlanie 1-2 z 2
Tytuł:
Istota wychowania patriotycznego
The essence of patriotic education
Autorzy:
Kolmann, Piotr
Foldyna, Libor
Powiązania:
https://bibliotekanauki.pl/articles/956551.pdf
Data publikacji:
2018
Wydawca:
Akademia im. Jakuba z Paradyża w Gorzowie Wielkopolskim
Tematy:
wychowanie patriotyczne
edukacja patriotyczna
patriotyzm
ojczyzna
patriotic education
patriotism
fatherland
Opis:
Patriotic education is not an easy task, despite the of experience in this field,that has been acquired over centuries. It is an effort of individuals, social groups, the nation that have organized within the state. It is hard not to notice that nowadays many countries spendhuge sums of money for this purpose. Patriotic education is strongly related to civil education and national defense education –that is why it must be considered as one of many determinants of safety. It “plays the first fiddle” in the nation’s development and the need for its implementation is still relevant, important.
Źródło:
Studia Administracji i Bezpieczeństwa; 2018, 4; 13-19
2543-6961
Pojawia się w:
Studia Administracji i Bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Ray CT inspection of subsurface areas of concretes exposed to fast flowing liquids
Autorzy:
Sitek, Libor
Hlaváček, Petr
Souček, Kamil
Bodnárová, Lenka
Foldyna, Josef
Zajícová, Vendula
Berčáková, Andrea
Foldyna, Vladimír
Powiązania:
https://bibliotekanauki.pl/articles/2064423.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
erosion
concrete
fast flowing liquid
high-speed water jets
X-Ray CT
erozja
konstrukcja betonowa
beton
przepływy wody
badania rentgenowskie
Opis:
Concrete structures affected for a long time by flowing liquids are exposed to gradual erosion in surface layers caused by a combination of several degradation processes: abrasion, cavitation and chemical or bacterial impacts. Due to the complex phenomena and difficult-to-define initial and boundary conditions, the whole process cannot be easily simulated using the conventional computing tools. Laboratory experimental research is thus the most appropriate approach for the investigation of a suitable composition of concrete resistant to the flowing liquids. However, the methods used are often very time consuming and last even several years. High-speed water flows can be elegantly used for the acceleration of the mechanical simulation of a real situation. Several experiments on the effects of the high-speed water flows on concrete surfaces have been carried out. Using the X-Ray CT methods, subsurface structures of concretes exposed to the accelerated mechanical simulation of the erosion wear caused by fast flowing liquids were investigated and presented in the article. It has been shown that the simulation does not cause initiation of new fractures or cracks in the original concrete structure. The pure water flow mainly removes the hardened cement paste and reveals the aggregate grains. The water flow with abrasive particles disintegrates in greater depths and washes out entire aggregate grains, eventually amputates them and finally smoothens entire surface.
Źródło:
New Trends in Production Engineering; 2019, 2, 1; 450--459
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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