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Wyświetlanie 1-15 z 82
Tytuł:
Social media literacy among nursing students during the COVID-19 pandemic - does year of study matter? A nationwide cross-sectional study
Autorzy:
Cieślak, I.
Łuszczki, J.J.
Panczyk, M.
Nowak-Starz, G.
Wawrzuta, D.
Jaworski, M.
Gotlib, J.
Powiązania:
https://bibliotekanauki.pl/articles/28761644.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 1; 171-176
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Is job seniority a protective factor against anxiety among midwives during the SARS-CoV-2 pandemic?
Autorzy:
Gotlib, J.
Rzońca, E.
Baranowska, B.
Tataj-Puzyna, U.
Pawlicka, P.
Jaworski, M.
Wójcik-Fatla, A.
Panczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/28762756.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 352-357
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of extraction and purification of RNA from plant bulbs
Autorzy:
Duszyn, M.
Swiezawska, B.
Kwiatkowski, M.
Jaworski, K.
Szmidt-Jaworska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2117778.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
bulbs
ornamental plants
polyphenols
polysaccharides
RNA isolation
Opis:
RNA extraction involves several main stages, regardless of the method of extraction: homogenization, effective denaturation of proteins from RNA, inactivation of ribonuclease and removal of any DNA, protein, and some residual contamination. Isolation of undamaged intact RNA is challenging when the related tissue contains high levels of polysaccharides and phenols. Several efforts have been made towards the comparison and optimization of extraction and purification methods for RNA from plant tissues. This is dictated by the necessity of obtaining RNA of a good quality and in a sufficient quantity for further molecular analyzes. Plant storage organs (such as bulbs or seeds) rich in polysaccharide and polyphenolic compounds present distinct challenges for total RNA isolation. Such components, considered in this case as contamination, may bind and co-precipitate with nucleic acids and negatively affect later assays. Since standard routine protocols yield unacceptable results in bulbs, we have designed a new method for RNA extraction. We used two modified procedures (based on CTAB and sarkosyl reagents) of RNA extraction from so called “difficult plant material” and compared them to a popular RNA isolation base on the column isolation kit and TriPure reagent. Our modified protocols dealt with problems of both RNA degradation and low yield caused by co-purification with polysaccharides present in plant bulbs. In this study we have shown that improvement of the CTAB and sarkosyl method with a lyophilization step of plant tissues leads to isolation of high quality RNA from difficult material like storage organs of bulbous plants. The main changes in the procedure compared to the previously described methods concerned the different order of lithium chloride and sodium acetate addition, lithium chloride concentration increase and modification of centrifugation conditions. Gel electrophoresis and spectrophotometer analysis confirmed the high quality and integrity of the obtained RNA. The modified procedures allowed for obtaining a satisfying amount of RNA concentration in the range from 280 to 950 ng/μl depending on the plant species. Thus, the demonstrated RNA isolation methods are efficient and can be used for plant material rich in polysaccharides, such as bulbs.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2020, 62, 2; 17-30
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elements of eating pattern and intensity of dysmenorrhea-a cross-sectional study in sample of Polish women
Autorzy:
Szymańska, K.
Jaworski, M.
Gotlib, J.
Panczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087666.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
menstrual pain
dietary habit
dysmenorrhea
vegetarian diet
woman health
Opis:
Background: The importance of dietary pattern for pain relief in women with dysmenorrhea is increasingly discussed in the literature. It is believed that a proper eating pattern may have pain-relieving properties. The development of a perfect diet composition for patients with dysmenorrhea constitutes a major challenge. Aim of the study: The present study aimed to characterize the eating pattern of Polish women with severe and moderate dysmenorrhea. Material and methods: The observational cohort study was conducted among 718 women, divided into two subgroups: Group 1 (G1) comprised women suffering from severe pain (N = 355), while Group 2 (G2) involved women with moderate pain (N = 363). Two measurement tools were used in the study: The Visual Analogue Scale (VAS) and an original questionnaire for assessing the frequency of consumption of selected food groups. Results: The average consumption of vegetables, fruits, dairy products and coffee was significantly lower in G1 than in G2. On the other hand, average consumption of meat, fish and fast food products was significantly higher in G1 than G2. The greatest effect size was observed for the consumption of coffee, as well as fruits and vegetables. Women from G2 had a diet like the lacto-ovo-vegetarian diet, whereas those from G1 followed a Western model diet containing fast food products and foods rich in sugar, salt, and saturated fatty acids. Conclusions: A proper diet should be promoted among women suffering from dysmenorrhea. The use of a proper diet may be particularly important for the treatments offered to this group of patients.
Źródło:
Medical Science Pulse; 2020, 14, 3; 10-17
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First natural frequency of multi-segment floor joists with variable cross section
Autorzy:
Chalecki, M.
Jaworski, J.
Szlachetka, O.
Powiązania:
https://bibliotekanauki.pl/articles/887011.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Scientific Review Engineering and Environmental Sciences; 2019, 28, 4[86]
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A 17-year survey of reproductive efficiency in Polish Konik horses
Ocena aktywności hodowlanej klaczy konika polskiego na podstawie obserwacji prowadzonych podczas 17 sezonów
Autorzy:
Siemieniuch, M.J.
Jaworski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2600646.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Polish horse
conservation breed
conception
pregnancy rate
foal
breeding
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2018, 17, 1; 31-39
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of the numerical studies on planar and tubular solid oxide fuel cells within four EU projects of the 7th framework programme
Autorzy:
Pianko-Oprych, P.
Jaworski, Z.
Zinko, T.
Palus, M.
Powiązania:
https://bibliotekanauki.pl/articles/185086.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Solid Oxide Fuel Cell
stack
fuel cell system
Computational Fluid Dynamics
CFD
Finite Element Method
FEM
modelling
process simulation
ogniwo paliwowe z tlenkiem stałym
system ogniw paliwowych
obliczeniowa dynamika płynów
metoda elementów skończonych
MES
modelowanie symulacje procesu
Opis:
The paper addresses the issues of quantification and understanding of Solid Oxide Fuel Cells (SOFC) based on numerical modelling carried out under four European, EU, research projects from the 7FP within the Fuel Cell and Hydrogen Joint Undertaking, FCH JU, activities. It is a short review of the main projects’ achievements. The goal was to develop numerical analyses at a single cell and stack level. This information was integrated into a system model that was capable of predicting fuel cell phenomena and their effect on the system behaviour. Numerical results were analysed and favourably compared to experimental results obtained from the project partners. At the single SOFC level, a static model of the SOFC cell was developed to calculate output voltage and current density as functions of fuel utilisation, operational pressure and temperature. At the stack level, by improving fuel cell configuration inside the stack and optimising the operation conditions, thermal stresses were decreased and the lifetime of fuel cell systems increased. At the system level, different layouts have been evaluated at the steady-state and by dynamic simulations. Results showed that increasing the operation temperature and pressure improves the overall performance, while changes of the inlet gas compositions improve fuel cell performance.
Źródło:
Chemical and Process Engineering; 2018, 39, 4; 377--393
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cloud technology in market
Autorzy:
Iztayev, Z. H. D.
Medetbekov, M. M.
Mombekova, S. S.
Aikhynbay, K. T.
Shaimerdenova, G.
Jaworski, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/1177321.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
analysis and development prospects
cloud
cloud technologies
cloud technologies in education
global IT market
information technologies
third platform
Opis:
This work is devoted to one of the most promising and dynamic segments in the information technology market - cloud computing. The information technology sector plays a significant role in the world economy. To date, the study of the IT market and its segments is one of the most relevant topics. Experts pay special attention to cloud technologies. The work describes in detail the structure of the IT market, conducted a study of its elements, including cloud technologies, will affect the development of the global information technology market. Within the framework of the research, the analysis of prospects and development of the cloud technology segment in various social spheres, including education, business, leisure, was conducted. Various sources, including foreign ones, were used in the work.
Źródło:
World Scientific News; 2018, 104; 51-61
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consumption of selected beverages and teenagers’ perception of own health
Konsumpcja wybranych napojów a postrzeganie zdrowia przez młodzież
Autorzy:
Fabisiak, A.
Jaworski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2052831.pdf
Data publikacji:
2018
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
health promotion
teenagers
nutrition
energy drinks
promocja zdrowia
młodzież
żywienie
napoje energetyczne
Opis:
Background. Health can be perceived as a set of individual determinants that enable a person to develop in various areas. Some people view their health subjectively to realise their owns goals. The following study aims to investigate health- and eating-related behaviours in young people with regard to selected alcoholic beverages. Material and methods. The group of people involved in the study consisted of 77 teenagers from a high school aged 17 to 18 years. The mean age of the entire group was 17.1 years (SD = 0.8 years). As for gender, the sample was dominated by women, who accounted for 58.4% (n = 45) of all the respondents, while men − 41.6% (n = 32). Results. When asked about the significance of good health and proper nutrition for teens, a large number of the girls participating in this survey, i.e. 51.9%, declared that health was important to them, whereas 29.9% claimed that it was very important. Furthermore, the teenagers involved in the study often claimed that they eat healthily (rho = 0.42; p <0.01) and 40.3% perceived their diet as healthy. Only 2.6% of the respondents viewed their diet as improper. Conclusions. Particular attention should be paid to building a sense of personal responsibility for health in young people. Health promotion programmes targeting young people should be aimed at developing their personality features which are indirectly associated with increasing awareness and responsibility for their own health, encouraging the individual to make right choices with regard to food products, including the type and quantity of beverages available on the market.
Wprowadzenie. Zdrowie można postrzegać jako zbiór indywidualnych uwarunkowań, które umożliwiają rozwój człowieka w różnych obszarach. Niektórzy ludzie subiektywnie postrzegają swoje zdrowie, aby zrealizować swoje własne cele. Celem poniższego badania było zbadanie zachowań zdrowotnych i żywieniowych związanych ludzi młodych w odniesieniu do wybranych napojów alkoholowych. Materiał i metody. Grupę osób biorących udział w badaniu stanowiło 77 nastolatków ze szkoły średniej w wieku od 17 do 18 lat. Średnia wieku całej grupy osób badanych wynosiła 17,1 lat (SD=0,8 lat). Pod względem płci, w badanej próbce dominowały kobiety, które stanowiły 58,4% (n=45) ogółu badanych, natomiast mężczyźni – 41,6% (n=32). Wyniki. Jeśli chodzi o znaczenie dobrego zdrowia i prawidłowego odżywiania nastolatków, duża liczba dziewcząt uczestniczących w tym badaniu, tj. 51,9%, zadeklarowała, że zdrowie jest dla nich ważne, podczas gdy 29,9% twierdziło, że było to bardzo ważne. Ponadto nastolatki biorące udział w badaniu często twierdziły, że zdrowo odżywiają się (rho = 0,42; p <0,01), a 40,3% postrzega dietę jako zdrową. Tylko 2,6% respondentów uważa swoją dietę za niewłaściwą. Wnioski. Szczególną uwagę należy zwrócić na budowanie poczucia osobistej odpowiedzialności za zdrowie u osób młodych. Programy promocji zdrowia skierowane do młodych ludzi powinny mieć na celu rozwijanie ich cech osobowości, które są pośrednio związane ze wzrostem świadomości i odpowiedzialności za własne zdrowie, zachęcanie jednostki do dokonywania właściwych wyborów w odniesieniu do produktów spożywczych i ilości napojów dostępnych na rynku.
Źródło:
Health Problems of Civilization; 2018, 12, 1; 22-28
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and theoretical modeling of waste combustion in a chamber with a moving grate
Autorzy:
Jaworski, T. J.
Pikoń, K.
Kajda-Szcześniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/185559.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
waste
combustion
physicochemical properties
emission of gas combustion products
quantitative evaluation indicators
marnotrawstwo
spalanie
właściwości fizykochemiczne
Opis:
The work contains a description of a developed experimental and theoretical method of modeling of solid waste combustion in a device equipped with a moving grate and capability to optimize the work of waste incineration plant. Implementation of this issue was based on results of experimental studies made on a laboratory scale boiler. This was possible by defining and testing indicators of quantitative assessment of combustion such as: reaction front rate, ignition rate, the rate of combusted mass loss and the heat release rate. These indicators as measurable "criteria indicators" allow transfer of parameters from a laboratory-scale unit, working in the transient egime into an industrial full scale grate device working continuously in stable determined conditions. This allows for wide optimization possibilities in the operation of a waste incineration plant, in particular the combustion chamber, equipped with a moving grate system.
Źródło:
Chemical and Process Engineering; 2018, 39, 1; 3-14
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First natural transverse frequency of truncated cone and wedge beams
Pierwsza częstość drgań własnych belek w kształcie ściętego stożka i klina
Autorzy:
Bagdasaryan, V.
Chalecki, M.
Gierasimiuk, M.
Jaworski, J.
Szlachetka, O.
Powiązania:
https://bibliotekanauki.pl/articles/40497.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
vibration
transverse frequency
truncated cone beam
truncated wedge beam
Rayleigh's method
Źródło:
Acta Scientiarum Polonorum. Architectura; 2018, 17, 1
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of the Numerical Method for Effective Refractive Index Calculation of Porous Composite Materials Using Microlevel Models
Autorzy:
Andrushchak, N.
Jaworski, N.
Lobur, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030591.pdf
Data publikacji:
2018-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.70.Dh
41.20.Cv
78.20.Ci
81.05.Rm
Opis:
The numerical method of the effective refractive index of porous composite materials calculation was improved by implementation of microlevel cellular structural models. The proposed solution gives the ability uniformly to analyse complex structural inhomogeneities and to synthesize the corresponding index based on the simulation of electrostatic field. The proposed realization is simpler and takes less computations capacities in comparison to analogous simulation methods. The method was probed on the example of SiO₂ nanoporous matrix with refractive index n=1.426 at λ=2.71 μm wavelength. The results of simulation are in good agreement with other analytical models from literature.
Źródło:
Acta Physica Polonica A; 2018, 133, 1; 164-166
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and elemental analysis of free range and stabled Polish Konik horses hair using Energy-dispersive X-ray spectroscopy (EDS)
Autorzy:
Kubiak, K.
Niedźwiedź, A.
Siwińska, N.
Jaworski, Z.
Żak, A.
Słowikowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087781.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
diet
elemental composition
hair
horses
Polish Konik
shortages
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 1; 65-72
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Principles of the toll roads pricing
Autorzy:
Jaworski, P.
Liberadzki, K.
Liberadzki, M.
Powiązania:
https://bibliotekanauki.pl/articles/224057.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transportation
PPPs projects
Public-private partnerships
toll roads
Engel curves
Tőrnquist function
transport
projekt PPP
partnerstwa publiczno-prywatnego
drogi płatne
krzywe Engla
funkcja Tőrnquist
Opis:
In this paper the authors refer to the method of commercial provision of road infrastructure called BOT (build-operate-transfer) under Public-private partnerships (PPPs) scheme. First we present the investment criteria for transportation PPP projects as well as application of price theory. Then we recognize that the different participants in PPP projects have distinct goals and requirements that must be met in order for them to be able to participate in an effective partnership. The main challenge for the toll road pricing is to determine the economically viable toll rate that takes into consideration the diverse and sometimes conflicting interests of different stakeholders involved in the project. The main objective is to review the theory of economic principles for optimal toll roads pricing and to review the existing approaches to transportation projects appraisal. Then the authors show how to formally derive the condition for toll rate that meets 2 criteria: 1) is socially optimal and 2) covers operator’s costs. For this purpose we use II type Tőrnquist function, a member of an Engel family of functions. This function models the relationship between income and consumption of inferior and normal goods. Tőrnquist function is a mathematical representation of the well-known Engel curves. These curves record the relationship between the quantity of goods purchased and total income. They are not necessarily straight lines. The demand for some “luxury” goods may increase proportionally more rapidly than income, whereas the demand for “necessities” may grow proportionally less rapidly than income. The precise shape will depend on the individual’s preferences for goods as reflected in the indifference curve map. We deem the highway trip to be a “second necessity good”. There is number of economists who apply the Tőrnquist function for microeconomic analysis. The extremely simple form of the Tőrnquist function allows to get the solution in a closed form.
Źródło:
Archives of Transport; 2018, 45, 1; 53-62
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regression function and noise variance tracking methods for data streams with concept drift
Autorzy:
Jaworski, M.
Powiązania:
https://bibliotekanauki.pl/articles/329716.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
data stream
concept drift
Parzen kernel
regression function
variance estimation
strumień danych
funkcja regresji
estymacja wariancji
Opis:
Two types of heuristic estimators based on Parzen kernels are presented. They are able to estimate the regression function in an incremental manner. The estimators apply two techniques commonly used in concept-drifting data streams, i.e., the forgetting factor and the sliding window. The methods are applicable for models in which both the function and the noise variance change over time. Although nonparametric methods based on Parzen kernels were previously successfully applied in the literature to online regression function estimation, the problem of estimating the variance of noise was generally neglected. It is sometimes of profound interest to know the variance of the signal considered, e.g., in economics, but it can also be used for determining confidence intervals in the estimation of the regression function, as well as while evaluating the goodness of fit and in controlling the amount of smoothing. The present paper addresses this issue. Specifically, variance estimators are proposed which are able to deal with concept drifting data by applying a sliding window and a forgetting factor, respectively. A number of conducted numerical experiments proved that the proposed methods perform satisfactorily well in estimating both the regression function and the variance of the noise.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 559-567
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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