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Wyświetlanie 1-15 z 32
Tytuł:
Przybliżony model matematyczny procesu gięcia elementów rurkowych na giętarkach
Approximate mathematical model of the process of bending tubular elements for benders
Autorzy:
Wojtyła, M.
Powiązania:
https://bibliotekanauki.pl/articles/155306.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elementy rurkowe
model matematyczny
gięcie
tube elements
mathematical model
tube bending
Opis:
Artykuł przedstawia przybliżony model matematyczny operacji gięcia elementów rurkowych na giętarce. Model nie uwzględnia aspektów fizycznych procesu gięcia. Jednakże, jak obrazuje załączony przykład, może z wystarczającą dokładnością służyć do symulacji procesu gięcia na giętarce. Model ten posłużył do wyznaczenia tolerancji w punktach nominalnych elementu opisanego w artykule "Dokładność maszyny do gięcia elementów rurkowych".
The paper presents an approximate mathematical model for operation of bending tubular elements (such as support frame of a motorbike, brake lines, etc.) on a bender. The model does not take into account physical aspects of the bending process. The process of creating a single length of the element (i-th segment) can be divided into three operations: 1) shifting the tube - identified in the model for mi, 2) turning the tube - identified in the model by γi, 3) bending the tube - identified in the model by αi. Homogeneous transformation matrices, corresponding to the specified parameters, take form (6), (7), which after multiplication gives the matrix (9). As shown in the presented example, for the element mathematical model (Fig. 6) can be used to simulate the bending process on benders with sufficient accuracy. This model was used to determine the tolerance of the nominal points of the element described in the paper "The accuracy of the machine for bending tubular elements".
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 3, 3; 302-305
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność maszyny do gięcia elementów rurkowych
The accuracy of a machine for bending tubular elements
Autorzy:
Wojtyła, M.
Powiązania:
https://bibliotekanauki.pl/articles/156812.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elementy rurkowe
model matematyczny
gięcie
dokładność giętarki
tube elements
tube bending
mathematical model
bender accuracy
Opis:
Opierając się na modelu matematycznym procesu gięcia elementów rurkowych przedstawionym w artykule „Przybliżony model matematyczny procesu gięcia elementów rurkowych na giętarkach” wyznaczono tolerancję punktów nominalnych elementu wygiętego na giętarkach. Wykorzystując wzory na tolerancję ogniwa zamykającego dla zamienności całkowitej i niecałkowitej obliczono tolerancję punktów nominalnych elementu. Jak wynika z przeprowadzonych obliczeń tolerancja punktów przewodu zwiększa się w kierunku przeciwnym do kolejności gięcia.
Based on the mathematical model of the process of bending tubular elements presented in the paper "An approximate mathematical model of the process of bending tubular elements on benders", there was determined the tolerance of nominal points of a tube (Fig. 1) bent on benders. The inaccuracies of independent parameters set up on a bender are a considerable source of errors arising during the bending of tubular components. Exemplary partial derivatives (the coefficients of influence) for point P04 are given in Table 1. These derivatives were calculated for two consecutive fixings of tubular elements to determine which partial derivatives should be evaluated in the next fixings. In four fixings (for point P04) there were calculated 48 influencing factors. The tolerance of the element nominal points was calculated with use of formulas (2) and (3) for the total and incomplete interchangeability. The tolerance associated with the bender repeatability is assumed to be the tolerance of various independent variables. From the calculations carried out it follows that the tolerance of the tube points increases in the opposite direction to the bending sequence (Tabs. 2 and 3).
Źródło:
Pomiary Automatyka Kontrola; 2013, R. 59, nr 1, 1; 63-65
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithms for measurement of bended elements by means of measuring arms equipped with contactless probes
Algorytm pomiaru elementów rurkowych za pomocą ramion pomiarowych z głowicą bezstykową
Autorzy:
Jakubiec, W.
Wojtyła, M.
Płowucha, W.
Powiązania:
https://bibliotekanauki.pl/articles/175747.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coordinate measuring technique
measuring arm
geometrical tolerances
contactless probe
uncertainty of measurement
współrzędnościowa technika pomiarowa
ramię pomiarowe
tolerancje geometryczne
głowica bezstykowa
niepewność pomiaru
Opis:
The paper presents proposals of algorithms for the control software for measuring arms equipped with the contactless probes (so called „V-probes”) as well as algorithms for bended elements' manufacturing-accuracy evaluation. The working principle of the V-probes is described. The critical analysis of the accuracy requirements specification for the bended elements is carried out. The typical measuring errors sources are pointed out.
W pracy przedstawiono opracowane algorytmy oprogramowania dla ramion pomiarowych wyposażonych w głowice bezstykowe V, także algorytmy prowadzenia analizy wyników pomiarów rurek powyginanych. Omówiono zasadę działania głowic bezstykowych V. Przeprowadzono krytyczną analizę dokładności wykonania elementów rurkowych. Wskazano typowe źródła błędów pomiaru.
Źródło:
Advances in Manufacturing Science and Technology; 2013, 37, 1; 119-130
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrastructural and antioxidative changes in lupine embryo axes in response to salt stress
Autorzy:
Wojtyla, L.
Grabsztunowicz, M.
Garnczarska, M.
Powiązania:
https://bibliotekanauki.pl/articles/57769.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
ultrastructural change
antioxidant
lupin
embryo
plant response
salt stress
Opis:
Embryo axes of lupine (Lupinus luteus L. ‘Mister’) were subjected to 0.1 M NaCl salt stress for 24 and 48 h. The ultrastructure modification and adjustment of antioxidant enzymes activities and izoenzymes profiles were observed. In cells of lupine embryo axes grown for 48 hours in medium with 0.1 M NaCl mitochondria took the forked shape and bulges of the outer mitochondrial membranes appeared. Moreover, the inflating and swelling of rough endoplasmic reticulum (RER) lumen and fragmentation of RER were noticed. The level of H2O2 was higher in salt treated embryo axes after 24 hours and increase of thiobarbituric acid reactive substances was observed after both 24 and 48 h of salt treatment. Native gel electrophoresis showed increased intensities of bands for catalase isozymes in response to salt stress, whereas activity of catalase was higher only in embryo axes grown for 48 h in control conditions. Appearance of two new isoforms of ascorbate peroxidase was observed after 48 h only under control condition, however increased activities were stated for both control and salt-stress condition after 48 h. No changes in isozymes pattern for superoxide dismutase were observed, but significant decrease in superoxide dismutase activity was noticed in relation to time and salt stress. Possible role of these enzymes in salt stress tolerance is discussed. The 0.1 M salt stress is regarded as a middle stress for lupine embryo axes and the efficiency of stress prevention mechanisms is proposed.
Źródło:
Acta Societatis Botanicorum Poloniae; 2013, 82, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical activity patterns in third trimester of pregnancy - use of pregnancy physical activity questionnaire in Poland
Autorzy:
Wojtyła, C.
Ciebiera, M.
Wojtyła-Buciora, P.
Janaszczyk, A.
Brzęcka, P.
Wojtyła, A.
Powiązania:
https://bibliotekanauki.pl/articles/2085962.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
pregnancy
physical activity
exercise
prenatal care
Opis:
Introduction. Adverse pregnancy outcomes are less common among physically active women, and children born to such mothers are less likely to be at risk for macrosomia, obesity and metabolic diseases in the future. Objectives. The aims of the study were to establish physical activity (PA) patterns among pregnant women in the third trimester, and to determine the attitudes of prenatal care providers to maternal PA during pregnancy. Materials and method. The study was conducted in 2017 using surveys from the Polish Pregnancy-related Assessment Monitoring System program (Pol-PrAMS). The study included 3,451 postpartum women. The Pregnancy Physical Activity Questionnaire was used to investigate their PA. This part of Pol-PrAMS study was completed by 2,744 postpartum women who were subjected to statistical analysis. Results. Sedentary or light physical activity comprised 75% of the overall PA in the third trimester of pregnancy (mean values of energy expenditure: 67 and 93.3 MET-h/week, respectively). Household or caregiving activities accounted for almost 50% of all activities and were the most common PA types (mean energy expenditure: 105 MET-h/week). Restriction of PA in pregnancy was reported by over 60% of the women, most often due to concerns over proper foetal development. Over 85% of prenatal care providers either did not address the issue of PA with the future mothers at all, or recommended PA restriction. Conclusions. Sedentary and light-intensity PA are the two predominant types of physical activity in the third trimester. The most energy-consuming tasks involve household and caregiving activities. Restriction of activity was reported by the majority of the respondents. Prenatal care providers either did not address the matter of PA in pregnancy or recommended PA restriction.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 388-393
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seed priming improves salt stress tolerance during germination by modulation of antioxidative capacity
Autorzy:
Kubala, S.
Wojtyla, L.
Garnczarska, M.
Powiązania:
https://bibliotekanauki.pl/articles/79921.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
seed priming
salt stress
reactive oxygen species
stress tolerance
germination
modulation
antioxidant capacity
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nutrition-related health behaviours and prevalence of overweight and obesity among Polish children and adolescents
Autorzy:
Wojtyla-Buciora, P.
Stawinska-Witoszynska, B.
Klimberg, A.
Wojtyla, A.
Gozdziewska, M.
Wojtyla, K.
Piatek, J.
Wojtyla, C.
Ignys, I.
Marcinkowski, J.T.
Powiązania:
https://bibliotekanauki.pl/articles/51457.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Tematy:
human nutrition
healthy behaviour
prevalence
overweight
obesity
Polska
child
adolescent
environmental factor
Opis:
Introduction. An adequate mode of nutrition is among the most important environmental factors affecting the development of Man and maintenance of a good health status. An improper selection of nutrients and irregular consumption of meals may lead to overweight and obesity. Objective. The characteristics of health behaviours of the examined population of schoolchildren, with consideration of nutrition and body weight disorders. A comparison of the opinions of schoolchildren and their parents concerning health behaviours. Development of guidelines for educational programmes carried out in the place of residence of the population of schoolchildren and their parents. Materials and method. The survey covered a randomised group of schoolchildren attending elementary and secondary schools in the Kalisz Province and province of the city of Kalisz. The study was conducted in May and June 2009, in a randomly selected representative group of 1,100 boys and girls from classes V and VI of elementary schools, and 1,100 secondary school adolescents aged 16–19 and their parents. The studies of schoolchildren attending elementary and secondary schools were compared with the all-Polish studies of junior high school adolescents in the school year 2006–2007. Results. The respondents most often consumed 3–4 meals; however, as many as 26% of junior high school adolescents and 27% of secondary school adolescents admitted that they consume only one meal daily. The schoolchildren show inadequate nutritional habits concerning an insufficient consumption of fruits, vegetables and fish, in favour of high calorific meals and sweet snacks and drinks. Parents improperly assess the body weight of their children and perceive them as slimmer, which is not confirmed by the BMI value for age and gender. Conclusions. Systematic monitoring and analysis of changes in the health behaviours of adolescents should be a basis for planning health education and promotion programmes. Educational programmes concerning various aspects of health should be implemented in an organized and complementary way, directed not only at schools, but also at entire families and local communities. Knowledge, beliefs, skills and attitudes towards health acquired during the period of adolescence decide about life style in adulthood.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alcohol consumption in Polish middle and high school pupils-has this rapidly increased during 2009–11?
Autorzy:
Wojtyla-Buciora, P.
Wojtyla, C.
Urbaniak, M.
Kapka-Skrzypczak, L.
Wojtyla, A.
Diatczyk, J.
Klimberg, A.
Piotrowski, K.
Marcinkowski, J.T.
Powiązania:
https://bibliotekanauki.pl/articles/50175.pdf
Data publikacji:
2014
Wydawca:
Instytut Medycyny Wsi
Opis:
Introduction. The dynamic rise of alcohol consumption in adolescents is a matter of serious concern, requiring frequently updated monitoring. By such means, it is possible to optimise preventative measures for dealing with this problem. Objective. To estimate the magnitude/amount and frequency of alcohol consumed by middle and high school pupils in Poland, including the circumstances when alcohol was first drunk. Materials and Methods. A randomised survey was performed throughout Poland on middle school (junior high school) pupils, (n=9360) in 2009, followed by both middle and high school pupils in 2011 (n=7971). The questionnaire was devised by the Polish Chief Sanitary Inspectorate (GIS). Results. A strikingly sharp increase in alcohol consumption (29%) was observed in subjects between 2009 – 2011. In the latter year, 1 month prior to survey, respectively, 50% and 71% of middle school and high school pupils drank alcohol, and correspondingly, 36% and 63% of these pupils ever became intoxicated/drunk. Conclusions. 1) Adolescent alcohol consumption increases with age and is highest in girls. Monitoring as well as in-depth analysis thus becomes necessary. 2) Systematic monitoring and analysis of changing healthy lifestyle behaviour should be used for taking the necessary corrective action. This should happen concurrently and consist of planned health education programmes, including health promotion.
Źródło:
Annals of Agricultural and Environmental Medicine; 2014, 21, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modulation of antioxidative metabolism in response to osmopriming in Brassica napus seeds improves germination under salt stress
Autorzy:
Wojtyla, L.
Kubala, S.
Lechowska, K.
Garnczarska, M.
Powiązania:
https://bibliotekanauki.pl/articles/79970.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
reactive oxygen species
antioxidant
stress tolerance
osmopriming
Brassica napus
seed
germination
salt stress
antioxidative enzyme
ascorbate peroxidase
superoxide dismutase
catalase
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of osmopriming on proline metabolism in germinating rape (Brassica napus L.) seeds under salinity stress
Autorzy:
Kubala, S.
Wojtyla, L.
Mikolajczyk, M.
Lechowska, K.
Garnczarska, M.
Powiązania:
https://bibliotekanauki.pl/articles/79882.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
osmopriming
proline
Brassica napus
seed
salinity stress
seed priming
abiotic stress
biotic stress
salinity tolerance
germinating seed
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tobacco-related Foetal Origin of Adult Diseases Hypothesis - population studies in Poland
Autorzy:
Wojtyla, A.
Gozdziewska, M.
Paprzycki, P.
Bilinski, P.
Powiązania:
https://bibliotekanauki.pl/articles/50119.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Opis:
Epidemiological studies in Poland show that tobacco smoking by adolescents at reproductive age is still frequently observed. This concerns both boys and girls. The study was based on all-Polish population studies of health behaviours of adolescents aged 14-24 (Youth Behavioural Polish Survey – YBPS) conducted in 2011, and the Pregnancy-related Assessment Monitoring Survey (PrAMS). More than 12% of pregnant women do not discontinue smoking in association with becoming pregnant and expose the foetus to tobacco smoke, despite being aware of the hazardous effect of smoking on the health of the mother and child. Smoking in pregnancy is mainly observed among mothers with a low education level and those aged under 23. According to the Baker’s Foetal Origins of Adult Health and Diseases Hypothesis, exposure of the foetus to the components of tobacco smoke results in many perturbations in the form of a lower birth weight, prematurity, worse state of neonates after birth, and higher susceptibility to contacting civilization diseases at the age of adulthood. The results of studies confirm some observations. Polish studies clearly confirmed a lower birth weight of babies delivered by mothers who smoke; however, earlier termination of pregnancy and worse status of neonates after birth were not observed. According to the Baker’s hypothesis, a lower birth weight of babies delivered by smoking mothers during the further life cycle exposes the offspring to the risk of contracting civilization diseases. The efforts undertaken by public health authorities should be biased towards education of the population at reproductive age about the hazardous effect of smoking on the health of the foetus and the offspring born. Women at reproductive age should be encouraged to discontinue smoking in association with the planning of pregnancy and in pregnancy.
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dopalacze - stan aktualny i wytyczne na przyszłość
Legal highs - current state and guidelines for the future
Autorzy:
Kapka-Skrzypczak, L.
Cyranka, M.
Kulpa, P.
Skrzypczak, M.
Wojtyla, A.
Powiązania:
https://bibliotekanauki.pl/articles/4568.pdf
Data publikacji:
2011
Wydawca:
Instytut Medycyny Wsi
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2011, 17(46), 4
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of human specimens for the presence of highly pathogenic zoonotic avian influenza virus A [H5N1] in Poland in 2006-2008 - justified or unnecessary steps?
Autorzy:
Romanowska, M
Nowak, I.
Brydak, L.B.
Wojtyla, A.
Powiązania:
https://bibliotekanauki.pl/articles/50626.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
avian influenza virus type A
zoonosis
influenza
H5N1 subtype
avian influenza
disease outbreak
diagnostic test
Polska
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 2; 239-247
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kwas foliowy - skutki niedoboru i zasadność suplementacji
Folic acid - effects of deficiency and justification for supplementation
Autorzy:
Kapka-Skrzypczak, L.
Niedzwiecka, J.
Skrzypczak, M.
Wojtyla, A.
Powiązania:
https://bibliotekanauki.pl/articles/4443.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2012, 18(47), 1
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Legal highs - legal aspects and legislative solutions
Autorzy:
Kapka-Skrzypczak, L.
Kulpa, P.
Sawicki, K.
Cyranka, M.
Wojtyla, A.
Kruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/50592.pdf
Data publikacji:
2011
Wydawca:
Instytut Medycyny Wsi
Tematy:
legal high
legal aspect
legislative solution
legal regulation
new risk
public health
designer drug
psychoactive substance
Źródło:
Annals of Agricultural and Environmental Medicine; 2011, 18, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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