Autor: Mrozik, L. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Use of admixture effectiveness curves for prediction of the compressive strength of concrete
Autorzy:: Grzybowska, A.
Mrozik, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/298128.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: additive
cement paste
low water-binder ratio
effectiveness curve
Opis:: This paper presents the results of individual laboratory tests conducted in the Research and Experiment Facility of the University of Science and Technology in Bydgoszcz, in particular of tests conducted on pastes of low water-binder ratios (from 0.2 to standard water demand (Mrozik 2012)). The purpose of this document is to examine the effect of the applied admixtures (plasticizer or superplasticizer) and its amount on the bulk density of a cement paste, thus on the compressive strength of concrete (as shown in the paper (Neville 2012), properties of concrete can be estimated on the basis of pastes). Conclusions concerning the suitability of specific amounts of plasticisers and superplasticizers were formulated and effectiveness curves were established on the basis thereof.
Źródło:: Technical Sciences / University of Warmia and Mazury in Olsztyn; 2018, 21(3); 175-182
1505-4675
2083-4527
Pojawia się w:: Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Occurrence of alcohol addiction in the adult population living in rural areas
Autorzy:: Mroczek, B.
Mrozik, L.
Kotwas, A.
Brzezniak, H.
Wolińska, W.
Niewczas, M.
Zabielska, P.
Grzywacz, A.
Powiązania:: https://bibliotekanauki.pl/articles/2081939.pdf
Data publikacji:: 2018
Wydawca:: Instytut Medycyny Wsi
Tematy:: MAST Test
AUDIT Test
alcohol drinking
HBI
social activity
Opis:: Introduction. Risky alcohol consumption is one of the main threats to the health of both individuals and society as a whole. These threats affect, among others, health, safety and financial situation. Their scale and intensity cause the issue of alcohol consumption to become a significant challenge for public health. Objective. The aim of the study was assessment of the occurrence of the problem of alcohol consumption among residents of rural areas in Western Pomerania and the Lubuskie Province of Western Poland. Materials and method. The study was conducted on 350 residents of rural areas – 236 females (66.4%) and 114 males (32.6%), median age – 42 y. (range – 20–76 years). The tools used included MAST and AUDIT questionnaires, Health Behaviour Inventory (HBI), Social Activity Questionnaire (SA), and original questions. Results. In the studied group the problem with proper alcohol consumption occurred. High convergence was observed between results obtained by individual respondents with both tools (r=0.868 with p<0.001). Median on the AUDIT scale indicated the possibility of alcoholism occurrence in the studied group, whereas the MAST test indicated the necessity to conduct an in-depth alcohol diagnosis. Factors that differentiated the points scored by respondents in AUDIT test included gender – more women drank alcohol in a risky way (Z=-2.54, p=0.011), education, health behaviours, professional passivity, and using various forms of support. In the AUDIT test, the alcoholism threat was over 7 times higher in people without permanent employment (vs. employed people), OR=7.41 (95% CI-4.56–12.04), and in MAST test it was over 4 times higher in these individuals: OR =4.45 (95% CI–2.64–7.49). Conclusions. Results indicate the need to intensify the work of regional facilities for solving alcohol problems, as well as educational campaigns in schools and health care facilities.
Źródło:: Annals of Agricultural and Environmental Medicine; 2018, 25, 4; 659-664
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Symulacja strat miejscowych w łuku o przekroju okrągłym
Simulation of minor loss coefficient in bend with circular cross-section
Autorzy:: Smyk, E.
Mrozik, D.
Olszewski, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/95398.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:: modelowanie numeryczne
współczynnik strat miejscowych
kształtki
numerical modeling
minor loss coefficients
fittings
Opis:: Współczynnik strat miejscowych ξ wyznaczany jest doświadczalnie dla różnego rodzaju kształtek. Jest to czasochłonny oraz kosztowny proces. W związku z tym należy poszukiwać metod, które pozwolą zminimalizować nakłady z tym związane. Jest to szczególnie ważne w przypadku projektowania nowego rodzaju kształtek lub przekrojów kanałów. Z tego powodu w pracy przedstawiono numeryczną metodę wyznaczania współczynnika strat miejscowych na przykładzie łuków o przekroju okrągłym.
Minor loss coefficient ξ is determined experimentally for different typer of fittings. It is time-consuming and expensive process, therefore we should be sought methods to minimize the expenses associated with it. It is particularly necessary in the case of design a new type of fittings or cross-section shapes of channels. With this reason, the paper proposes a numerical method for determining the minor loss coefficient on the example of bend with circular cross-section.
Źródło:: Postępy w Inżynierii Mechanicznej; 2017, 9(5); 45-52
2300-3383
Pojawia się w:: Postępy w Inżynierii Mechanicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Culture methods as indicators of the biological quality of phytostabilized heavy metal-contaminated soil
Autorzy:: Krzyżak, J.
Wasilkowski, D.
Płaza, G. A.
Mrozik, A.
Brigmon, R. L.
Pogrzeba, M.
Powiązania:: https://bibliotekanauki.pl/articles/363080.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: aided phytostabilization
EP indices
CD indices
contaminated soil
cadmium
lead
soil microbial populations
zanieczyszczenie gleby
ołów
kadm
fitostabilizacja
wskaźniki
drobnoustroje
gleba
Opis:: The short-term effect of aided phytostabilization of heavy metalcontaminated soil on microorganisms under outdoor field conditions was tested. Heavy metal contaminated soil from a mining site was amended with lignite, lime and two commercial fertilizers and vegetated with grass Festuca arundinacea. Results demonstrated that the amended phytostabilization approach of Pb-Cd contaminated soil gave a positive change on the native microbial populations evaluated by culturable techniques during the first 28 weeks of the experimental period. In the end of the experiment, the number of bacteria, actinomycetes and fungi increased in treated soil about 16-fold, 10-fold and 2-fold, respectively. Changes in the biodiversity of bacterial populations were evaluated by the Ecophysiological Index (EP) and the Colony Development Index (CD) for oligotrophs and copiotrophs. During the experimental period slower growing microorganisms (K-strategists) predominated. The application of amendments to the soil led to an increase of the CD index in both copiotroph and oligotroph populations after 28 weeks. EP, CD, bacteria, actinomycetes and fungi increased in the treated soil. Traditional microbiological methods based on culture techniques can be used to evaluate the biological quality of the phytostabilized heavy metal-contaminated soil.
Źródło:: Environmental Biotechnology; 2013, 9, 1; 6-13
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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