Autor: Bednarz, Katarzyna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Projektowanie konstrukcji sprężonych dawniej i dziś
PRESTRESSED CONSTRUCTIONS DESIGNING IN THE PAST AND IN THE PRESENT
Autorzy:: Bednarz, Katarzyna
Powiązania:: https://bibliotekanauki.pl/chapters/39787928.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: konstrukcje sprężone
straty siły sprężającej
współczynniki bezpieczeństwa
Opis:: Praca dotyczy zmiany podejścia obliczeniowego przy projektowaniu ustrojów sprężonych na przestrzeni lat. Porównane zostały podstawowe parametry wytrzymałościowe materiałów oraz warunki bezpieczeństwa konstrukcji. Przedstawiono rozbieżności przy wyznaczaniu strat siły sprężającej, a także granicach dopuszczalnych naprężeń. Zaprezentowane treści mają na celu podniesienie świadomości inżynierskiej w zakresie postępu przy wyznaczaniu oddziaływań na elementy oraz dokładności prowadzonych obecnie obliczeń konstrukcyjnych.
For years there were many differences between base algorithms used to designing prestressed constructions. This problem applies for many aspects: safety coefficients, acceptable stresses and way to find prestressing force loss. Article contains some examples of those issues. Description waswtitten on the faith of previous and actual engineering standards and expert literature.
Źródło:: Konferencja Studentów i Doktorantów Wydziałów Budownictwa KONstruktor2015; 258-266
9788374938815
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Rozwiązania budowlane w Wilczym Szańcu
Autorzy:: Bednarz, Katarzyna
Szydłowski, Rafał
Powiązania:: https://bibliotekanauki.pl/articles/128670.pdf
Data publikacji:: 2019
Wydawca:: PWB MEDIA Zdziebłowski
Tematy:: konstrukcja betonowa
beton sprężony
belka strunobetonowa
fortyfikacja
Wilczy Szaniec
concrete structure
prestressed concrete
prestressed concrete beam
fortification
Opis:: The technology of erecting war shelters has been evolving over the centuries alongside the development of technology and building-oriented requirements. Many papers have been published on this subject in recent times. The ruins of the Wolf's Lair war fortress prompted the authors to write this wark with a slightly different emphasis than the previous papers. In addition to a brief history of the objects, the work presents the design guidelnes used in their construction and describes the construction solutions applied. In addition, where appropriate, the advantages and disadvantages of these construction solutions from an engineering point of view are highlighted.
Źródło:: Builder; 2019, 23, 4; 76-77
1896-0642
Pojawia się w:: Builder
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Sensitivity of Hydrocharis morsus-ranae L. to selected metals and its suitability for phytoremediation of waters contaminated with metals. A mesocosm study
Autorzy:: Gałczyńska, Małgorzata
Wróbel, Jacek
Bednarz, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/2174328.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: biomass
Hydrocharis morsus-ranae
mesocosm study
metals
photosynthetic pigments
phytoremediation
Opis:: Anthropogenic pollution leads to increased concentrations of metals in the freshwater and macrophyte. Aquatic plants substantially contribute to the structure, function as well as and service provision of aquatic ecosystems. Our microcosm experiments were to test the possibility of the physiological response of Hydrocharis morsus-ranae to metal (Cd, Pb, Cu, Zn, Mn, Fe at three level of concentration) contaminated waters. Biomass was analysed at the beginning and at the end of the experiment. At the same time contents of photosynthetic pigments in leaves were estimated spectrophotometrically. We found that this macrophyte had the ability to grow in contaminated waters, but the effects of high concentration of isolated metals in water will indicate changes consisting in the disappearance of a significant part of biological populations were which manifested in alteration of the content of photosynthetic pigments as well as this plant’s growth. We show that generally stress of Zn and Cu influenced the drop of dry biomass which was connected with a positive correlation between the amount of dry biomass and the content of chlorophyll a and carotenoids, or only carotenoids, respectively. The highest stress of Pb and Fe (third concentrations of these metals) also influenced the drop of biomass. We concluded that none of Cd concentrations were toxic to this plant, but the effect of Mn stress was not unequivocal. Moreover, plant growth was stimulated by low Fe concentrations (first concentration) demonstrating the hormesis effect. When plants were exposed to this metal, there was no evidence of damage to the photosynthetic processes.
Źródło:: Journal of Water and Land Development; 2022, 55; 67--77
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Association between body mass and physical activity with quality of life in patients with rheumatoid arthritis
Autorzy:: Świtała, Anna
Wyszyńska, Justyna
Czerwińska, Kinga
Dereń, Katarzyna
Podgórska-Bednarz, Justyna
Guzik, Agnieszka
Powiązania:: https://bibliotekanauki.pl/articles/454682.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:: body mass index
quality of life
physical activity
rheumatoid arthritis
Opis:: Introduction. Rheumatoid arthritis (RA) is a progressive joint condition that leads to joints destruction and complications in the internal organs and significantly affects the a patient’s functional, physical, psychological and social condition. Over the last few years, research into the quality of life (QoL) in people with chronic disease has been conducted to assess the results of treatment. Aim. The aim of the study was to assess QoL in various areas of life in regards to physical and mental functioning, social relations, and environmental influences in people with RA. Material and methods. The study group (subjects with RA) and the control group (subjects without RA) consisted of 48 people each. Subject age ranged from 19 to 68. In order to assess QoL, the WHOQOL-BREF questionnaire was used, while socio-demographic data were assessed with a questionnaire developed by the authors. Results. QoL in people with RA was lower than that of healthy individuals. The worst QoL was observed in the physical domain. No statistically significant association was found between BMI and QoL. It was found, however, that subjects with RA and a higher level of physical activity had a better QoL than those with a lower level of physical activity. Conclusion. There was no association between the body mass of RA patients and QoL assessment. However, an association was found between the level of physical activity in people with RA and QoL in the physical and environmental domain.
Źródło:: European Journal of Clinical and Experimental Medicine; 2017, 3; 200-205
2544-2406
2544-1361
Pojawia się w:: European Journal of Clinical and Experimental Medicine
Dostawca treści:: Biblioteka Nauki

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