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    Wyświetlanie 1-44 z 44
    Tytuł:
    Child sexual abuse based on the crosswise model: a cross-sectional study on 18–24-year-old Iranian students
    Autorzy:
    Vakilian, Katayon
    Abbas Mousavi, Syyed
    Keramat, Afsaneh
    Powiązania:
    https://bibliotekanauki.pl/articles/552723.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    child abuse
    students
    cross-sectional studies.
    Opis:
    Background. Child sexual abuse refers to the compulsory sexual stimulation of a child or adolescent by an adult or older adolescent and includes a wide range of behavior, such as exhibitionism, fondling, sexual intercourse and using children for pornography. Objectives. The present study used the crosswise model to investigate childhood sexual abuse among Iranian university students. Material and methods. This cross-sectional study used a multi-stage method to examine 1,500 subjects in the universities of Shahroud, Iran. The questionnaire consisted of a pair of questions evaluating sexual abuse based on the crosswise approach, one sensitive and the other non-sensitive. To ensure the confidentiality of information, the questionnaire was distributed anonymously among the 1,500 students of 6 universities, and the students’ field of study was not mentioned. The collected data was analyzed with descriptive tests (mean and percent) and inferential tests, (independent t-test, chi-squared and crosswise) using SPSS 18 and STATA software. Results. A total of 11% of the girls and 27% of the boys were found to have suffered a form of sexual abuse. Conclusions. The results indicate a high prevalence of sexual abuse among Iranian children. Evaluating sexual abuse helps health policymakers to focus on parent training through health programs and educational programs in schools
    Źródło:
    Family Medicine & Primary Care Review; 2019, 3; 249-252
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Potrzeba rozmowy o zdarzeniu traumatycznym a poziom symptomów PTSD
    Need of talking about traumatic event and PTSD symptoms development
    Autorzy:
    Dudek, Bohdan
    Szymczak, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/2139694.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    traumatic stress
    PTSD
    longitudinal study
    cross-sectional study
    Opis:
    There were many studies on treatment and prophylaxis of PTSD. It was assumed that a need of talking about of the traumatic event has been a factor moderating relationship between exposure to traumatic event and PTSD symptoms development. Aim of the study was to test this assumption. The study was conducted on police officers according longitudinal procedure, it means that the study was performed in two stages with one year break. It was a possibility to make an analysis of obtained results as if it were two studies; cross-sectional and longitudinal ones. Each analysis let us draw opposing conclusions. Need of talking about traumatic event appeared to be a resistance factor in former one and a sensibilizing factor in letter one.
    Źródło:
    Acta Universitatis Lodziensis. Folia Psychologica; 2010, 14; 63-70
    2353-4842
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Psychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the Finnish Diabetes Risk Score (FINDRISC) for diabetes screening in occupational health care
    Autorzy:
    Vandersmissen, Godelieve J.
    Godderis, Lode
    Powiązania:
    https://bibliotekanauki.pl/articles/2177344.pdf
    Data publikacji:
    2015-04-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    diabetes mellitus
    occupational health
    questionnaires
    cross-sectional studies
    Opis:
    Objectives The objective of the study was to investigate the prevalence of undiagnosed dysglycaemia and the risk for type 2 diabetes using the Finnish Diabetes Risk Score (FINDRISC) in the working population of Belgium. Moreover, it was to evaluate performance and applicability of FINDRISC as a screening tool during occupational health surveillance. Material and Methods A cross-sectional analysis was carried out over the years 2010–2011 among 275 healthy employees who underwent a health check including fasting plasma glucose and the FINDRISC questionnaire. The sensitivity, specificity and predictive value of different FINDRISC cut-off values to detect dysglycaemia was revised in the literature and then calculated. Results The prevalence of unknown dysglycaemia was 1.8%. Twelve percent of the employees had a FINDRISC score of 12 to 14 corresponding to a moderate risk of 17% to develop diabetes within the next 10 years, and 5.5% had a score of 15 or more corresponding to a high – very high risk of 33% to 50%. All dysglycaemic individuals had a FINDRISC score of 12 or higher. The sensitivity and specificity for detecting dysglycaemia was respectively 100% and 84.1% for a FINDRISC cut-off value ≥ 12; and 80% and 95.9% for a cut-off value ≥ 15. Conclusions A considerable number of workers had dysglycaemia or was at risk for developing type 2 diabetes. The questionnaire is a reliable, valuable and easy to use screening tool in occupational health surveillance.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 3; 587-591
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prevalence and predictive factors for exclusive breastfeeding in the first 6 months among mothers attending Primary Health Care Centers in Cairo, Egypt
    Autorzy:
    Emara, Zeinab Abdelhay
    Essam Eldin Amin, Ghada
    Hamid, Diaa Marzouk Abdel
    Allam, Mohamed Farouk
    Powiązania:
    https://bibliotekanauki.pl/articles/2038152.pdf
    Data publikacji:
    2021-06-30
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    breastfeeding
    cross sectional
    infants formula
    primary healthcare
    risk factors
    Opis:
    Introduction. Although most organizations recommend breastfeeding for at least one year due to its well-known beneficial effects, the prevalence of exclusive breastfeeding in many developing countries was quite low. Aim. To identify prevalence and predictive factors affecting exclusive breastfeeding in Primary Healthcare (PHC) Centers in Cairo, Egypt. Material and methods. A cross-sectional study, among mothers attended first six months immunization sessions in three PHC Centers were selected via a convenient sample, A total sample of 180 mothers, 60 from each PHC Center, were subjected to an interview questionnaire. The questionnaire used was previously validated and pre-tested. Data collection took the period from April to August 2019. Comparison between exclusive and nonexclusive breastfeeding according to possible risk factors was done. Results. The frequency of breastfeeding among the participants was 90.6%; however the total exclusive breastfeeding frequency was only 39.4%. Our logistic regression model showed that exclusive breastfeeding decreased with progressive increase in infant’s age (OR 0.74), and mothers with good knowledge about proper practice of breastfeeding adhered more to exclusive breastfeeding (OR 2.51). Also, it showed that, during working hours, mothers who fed their infants other than breast milk adhered less to exclusive breastfeeding (OR 0.19). Conclusion. The prevalence of exclusive breastfeeding is quite low. The predictive factors for exclusive breastfeeding are, younger infant’s age, good knowledge of the mothers about proper practice of breastfeeding, and mothers insisting on breastfeeding during working hours.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2021, 2; 145-152
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association between depression, parameters of adiposity and genetic polymorphisms of pro-inflammatory cytokines: IL-1α, IL-1β, IL-2 and IL-6 in subjects over 55 years old
    Autorzy:
    Adler, Grażyna
    Skonieczna-Żydecka, Karolina
    Madlani, Agnieszka
    Ogonowski, Jarosław
    Grochans, Elżbieta
    Pierzak-Sominka, Joanna
    Brodowski, Jacek
    Karakiewicz, Beata
    Powiązania:
    https://bibliotekanauki.pl/articles/1038807.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    cross sectional study
    genetic variants of cytokines
    obesity
    depression
    Opis:
    Background. During the last few decades, adiposity has become a relatively common phenomenon worldwide. The available data on the effects of pro-inflammatory factors in both depression and adiposity has been attracting great attention. Aim. We sought to assess the prevalence of -889C>T IL-1α, -31T>C and -511C>T IL-1β, -330T>G IL-2 and -174G>C IL-6 genes and their association with adiposity and depression in Polish subjects. Methods. A cohort study was conducted in 2013/2014, covering a sample of 297 individuals (217 female and 80 male). Anthropometric data was handled using the BIA analysis method, while for genotyping PCR-RFLP techniques were used. Results. A positive correlation between depression and anthropometric parameters: adipose tissue (in kg) and adipose tissue (in %) (R=0.135 and p=0.02, R=0.114 and p<0.05, respectively) was found. No association between studied polymorphisms and depression was observed. Conclusion. Although it was not possible to demonstrate any influence of the studied polymorphisms as the genetic modulator of depression, authors believe that the presented data are noticeable and may provide the basis for future studies on larger groups.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 2; 253-259
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinants of environmental domain of quality of life in economically active population living in Silesian agglomeration, Poland
    Autorzy:
    Kowalska, Małgorzata
    Danso, Felix
    Humeniuk, Maria
    Kułak, Elżbieta
    Arasiewicz, Hubert
    Powiązania:
    https://bibliotekanauki.pl/articles/2179798.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    cross-sectional study
    quality of life
    WHOQOL-BREF questionnaire
    Opis:
    Objectives: The aim of this paper is to identify the factors that determine the environmental domain of quality of life in economically active adults living in the industrial agglomeration in Poland. Materials and Methods: During the crosssectional epidemiological study conducted among the economically active population aged 45–60, we used a short version of the WHOQOL-BREF questionnaire. Respondents were recruited randomly from selected factories located in the Silesian Agglomeration. The statistical analysis used descriptive and analytical methods available in the Statistica 9.0 software. Results: The results confi rmed the statistically signifi cant association between marital status, type of occupational activity, declared health status, and the environmental domain of quality of life in economically active inhabitants of the Silesian Agglomeration. The best qualities of life in the environmental domain were those of married people, white collars, and persons who declared their health status to be the best. Conclusions: The major determinants of environmental quality of life in economically active population living in the industrial agglomeration include non-occupational factors, such as marital status and current health status, while a signifi cantly better quality of life was associated with being a white-collar worker and not living in the vicinity of the road with heavy traffic. The results may be useful for future planned activities intended to improve the health and the quality of working life.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 132-143
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    GVAR: A Case of Spurious Cross-Sectional Cointegration
    Autorzy:
    Kłębowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/2075401.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    global VAR
    GVAR
    panel VAR
    PVAR
    spurious cross-sectional cointegration
    Opis:
    Global Vector Autoregressive models came to be used quite widely in empirical studies using macroeconomic non-stationary panel data for the global economy. In this paper, it is shown that when the loading matrix of the cointegrating vectors is not block-diagonal and the cross-sectional spillovers of disequilibrium exist, the use of the GVAR model leads to spurious cross-sectional long-run relationships. Moreover, the results of Monte Carlo simulation show that the GVAR model is outperformed by other valid econometric approaches in terms of the maximum likelihood estimator of long-run coefficients, when the cointegrating vectors matrix is block-diagona
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2021, 2; 175-187
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of cognitive schemata in the development of posttraumatic stress disorder: results of cross-sectional and longitudinal studies
    Autorzy:
    Dudek, Bohdan
    Szymczak, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/2185476.pdf
    Data publikacji:
    2011-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    cross-sectional study
    longitudinal study
    SOC
    PTSD
    firefighters
    police officers
    Opis:
    Objective: There are two theories (by Horowitz and by Foa) which attempt at explaining the process of posttraumatic stress disorder (PTSD) development by information dissonance. The purpose of the present study was to verify these theories via cross-sectional and longitudinal studies. Materials and Methods: The study based on a cross-sectional design was performed on a representative group of Polish firefighters. The study using a longitudinal protocol was conducted among police officers. The level of PTSD was assessed using the Questionnaire for PTSD Measurement (K-PTSD). The sense of coherence (SOC) was measured with the Polish adaptation of the Orientation to Life Questionnaire by A. Antonovsky. Results: In the cross-sectional study, the correlation coefficients between K-PTSD and SOC were –0.35 (p < 0.001) in the group of firefighters and –0.47 (p < 0.001) in that of police officers. In the longitudinal study, the relationship between SOC and PTSD symptoms appeared to be curvilinear and had the U-letter shape. Therefore, we used ANOVA for statistical analysis. Unfortunately, the F(2.31) = 1.900 and p > 0.05 indicated that the tendency we observed was not statistically significant. Conclusions: We would like to propose two possible explanations for the difference in the relationships between SOC and PTSD symptoms obtained in the studies employing the cross-sectional and the longitudinal protocols.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2011, 24, 1; 29-35
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Importance of Internet And Online Social Networks in the Spanish Hotel Sector
    Autorzy:
    Infante-Moro, A.
    Infante-Moro, J-C.
    Martínez-López, F-J.
    García-Ordaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118135.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    hotels
    online social networks
    internet
    e-commerce
    cross-sectional study
    Opis:
    This paper is a cross-sectional study on the use of Internet and Online Social Networks in the Spanish hotel sector compared to Spanish companies in other sectors. The conclusions from this extensive survey are that the use of online social networks is more important and is more developed in the hotel sector than in Spanish companies in general. However, although it gives considerable importance to online social networks, the hotel sector needs to revise its rules of usage. The use of new tools such as e-commerce to sell the hotel stays must increase, and marketing efforts should be geared more towards online social networks because the hotel sector is currently losing ground in a market that generates more and more potential clients and sales by the day.
    Źródło:
    Applied Computer Science; 2016, 12, 1; 75-86
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association of sports and physical activity with obesity among teenagers in Poland
    Autorzy:
    Glinkowska, Bożena
    Glinkowski, Wojciech M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2162035.pdf
    Data publikacji:
    2018-12-20
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    survey
    sport
    overweight
    children and adolescents
    body mass index
    cross sectional
    Opis:
    Objectives The purpose of the study was to assess the relationship between the body mass index and sports and physical activities in an unbiased, simple, random sample of teenagers from mid-northeastern Poland. Material and Methods Children and adolescents aged 10–19 years old were surveyed. The Internet-based survey was conducted to collect information on physical activity, leisure time, studying hours, weight, and height. Results Obesity was found to be low in the study population. The overall prevalence of overweight was not higher than 8%. Only 0.6% of participants were underweight. Overall, 68% of them confirmed participating in sports. Boys were frequently more active than girls (> 70% boys and > 60% girls). Participants mostly played soccer, volleyball, handball, or basketball (30.5%); 7% of them practiced martial arts and 16.5% of them participated in swimming. Sports activity significantly influenced body mass index. Obesity was not related to the lack of participation for physical activity in girls but a significant relationship was observed in boys (p < 0.02). The risk of obesity or overweight for inactive teenagers increased 2-fold (p < 0.01). Conclusions We report the overall participation of teenagers from 2 cities in mid-northeastern Poland in sports and physical activities and demonstrate that the lack of statistically significant differences in the body mass index and obesity and overweight is prevalent among boys and girls. Obesity was significantly related to less physical activity in boys, and the likelihood of obesity or overweight increased in inactive teenagers. Thus, we suggest that the importance of overweight and obesity prevention programs should be emphasized. Int J Occup Med Environ Health 2018;31(6):771–782
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 6; 771-782
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High prevalence of household pesticides and their unsafe use in rural South India
    Autorzy:
    Chitra, Grace A.
    Kaur, Prabhdeep
    Bhatnagar, Tarun
    Manickam, Ponnaiah
    Murhekar, Manoj V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2179781.pdf
    Data publikacji:
    2013-04-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    household pesticides
    mosquito coil
    prevalence
    cross-sectional survey
    Tamil Nadu
    India
    Opis:
    Objective: To estimate the prevalence of usage, unsafe practices and risk perception regarding household pesticides in a rural community of Tamil Nadu, India. Materials and Methods: In a cross-sectional survey we used a pre-tested questionnaire and trained interviewers to collect information on household pesticide use for the past 6 months from any adult member of randomly selected households. Results: Out of 143 households, 95% used at least one household pesticide (95% CI: 93.5-99.5) and 94% used at least one household pesticide specifically for mosquito control. The most commonly used pesticides were mosquito coils (75%), mosquito liquid vaporizers (36%), ant-killing powder (24%) and moth/naphthalene balls (18%). The major non-chemical methods of pest control were rat traps (12%) and mosquito bed nets (7.5%). Out of the mosquito coil users, 61% kept the windows and doors closed while the coil was burning. Out of the moth ball users, 88% left them in the place of use till they fully vaporized. Nearly half of the users did not know that household pesticides were harmful to their health and the health of their children. Conclusions: The use of household pesticides was highly prevalent in this rural community. The prevalence of unsafe practices while handling them was also high. We recommend that the users of household pesticides be educated about the health hazards and about safe practices and non-chemical methods of pest control be promoted.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 2; 275-282
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimism and Life Satisfaction of Poles during the Second and Fourth Waves of the COVID-19 pandemic
    Autorzy:
    Biel, Krzysztof
    Twardowska-Staszek, Estera
    Rostek, Irmina
    Powiązania:
    https://bibliotekanauki.pl/articles/29552052.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Papieski Jana Pawła II w Krakowie
    Tematy:
    COVID-19
    optimism
    life satisfaction
    psychological well-being
    cross-sectional studies
    Opis:
    The COVID-19 pandemic undoubtedly has had a negative impact on human psychological wellbeing, as confirmed by numerous studies. Positive psychology identifies optimism and life satisfaction as important factors having to do with the psychological wellbeing of individuals. This article aims to diagnose the level of optimism and life satisfaction of Poles during the 2nd and 4th waves of the COVID-19 pandemic, and to identify predictors of optimistic life orientation and life satisfaction in terms of demographic variables. The study was conducted on a group of 1,095 people using the snowball method, via social media. The results confirm a reduction in the level of optimism and life satisfaction of Poles during the COVID-19 pandemic. At the same time, the research confirms that resources such as marriage, having children, good education and stable work enhance a person’s level of psychological wellbeing and become a guarantee for better coping during the pandemic.
    Źródło:
    The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II; 2023, 13, 1; 243-269
    2391-6559
    2083-8018
    Pojawia się w:
    The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quality of life in parents of children and adolescents after systemic sting reactions
    Autorzy:
    Cichocka-Jarosz, E.
    Brzyski, P.
    Tarczoń, I.
    Jedynak-Wąsowicz, U.
    Tomasik, T.
    Lis, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083218.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    quality of life
    parents
    insect sting
    Hymenoptera venom allergy
    cross-sectional study
    Opis:
    Introduction and objectives. The study aimed at evaluating the impact of Hymenoptera venom allergy (HVA) in children and adolescents, on their parents’ QoL, taking into account their socio-demographic characteristics. Materials and method. The study sample consisted of 101 parents of children and adolescents aged 9–17 years, with a history of systemic reaction after insect sting who were referred for consultations in the tertiary level allergology department. The mean age of the parents was 39 years (SD=8.1; range 25–65 years); the majority were mothers (68%) and rural inhabitants (62%). QoL in parents of HVA children and adolescents was measured with the Parents of Children with Hymenoptera Venom Allergy Quality of Life Scale, a questionnaire covering 5 dimensions: anxiety, caution, limitations and discomfort, support provided to the child and feeling of safety, each measured on the scale ranging from 1 to 5. Independent predictors of QoL were estimated using the Generalized Linear Model. Results. Parents of urban children and adolescents treated with venom immunotherapy (VIT) up to 3 years (B=-1.37, 95CI= (-2.22;-0.53); p=0.001) and of rural children treated for more than 3 years (B=-0.94, 95CI=(-1.55;-0.33); p=0.003) reported lower anxiety than parents studied at diagnosis. In urban parents, individuals studied at VIT beginning reported a lower feeling of safety (B=-0.63, 95CI=(-1.11;-0.15); p=0.010); those studied up to 3 years of treatment reported a higher feeling of safety (B=0.64, 95CI=(0.11;1.16); p=0.018) than those studied at diagnosis. Contrariwise, in rural parents, those studied at the beginning of immunotherapy reported a higher feeling of safety than those studied at diagnosis (B=0.51, 95CI=(0.13;0.88); p=0.008). Conclusions. The longest VIT duration in children and adolescents with HVA is related to the decreased anxiety of their parents. Parent’s feeling of safety depends on the stage of treatment and place of residence.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2019, 26, 2; 315-321
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exposure to self-reported occupational noise and diabetes – A cross-sectional relationship in 7th European Social Survey (ESS7, 2014)
    Autorzy:
    Dzhambov, Angel M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2161901.pdf
    Data publikacji:
    2017-06-19
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    noise
    diabetes mellitus
    occupational exposure
    gender differences
    white-collar workers
    cross sectional
    Opis:
    Objectives Almost nothing is known about the effect of occupational noise on diabetes, and this is particularly relevant given the wide spread of both noise exposure and diabetes. This study has aimed to determine whether occupational noise exposure is associated with higher risk of diabetes in Europe. Material and Methods This study is based on 7th European Social Survey (ESS7, 2014) – a multi-country population-based questionnaire survey, which covered 28 221 Europeans aged ≥ 15 years old. Data on self-reported noise exposure, diabetes and other sociodemographic and work-related factors was available. The odds of prevalent diabetes were explored using unconditional logistic regression. Results In the total sample (N = 23 486), participants ever exposed to very loud noise had no substantive increase in the odds of diabetes (odds ratio (OR) = 1.01, 95% confidence interval (CI): 0.78–1.32). There were subgroups with non-significantly increased odds: men (OR = 1.12, 95% CI: 0.87–1.45), the elderly (OR = 1.09, 95% CI: 0.91–1.31), ethnic minority members (OR = 1.55, 95% CI: 0.91–2.62), those with secondary education (OR = 1.05, 95% CI: 0.78–1.41) and those living in small cities/towns (OR = 1.07, 95% CI: 0.89–1.29). Low-skilled white-collar workers had OR = 1.34 (95% CI: 1.09–1.64). Among participants employed during the preceding 5 years the odds were OR = 1.24 (95% CI: 0.95–1.61). Conclusions Self-reported occupational noise was not associated with increased odds of prevalent diabetes in the total sample. Sensitivity analyses revealed some subgroups with non-significantly higher odds. Our results suggest that further delve into the relationship between occupational noise and diabetes is feasible and warranted. Int J Occup Med Environ Health 2017;30(4):537–551
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2017, 30, 4; 537-551
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occupational risks for SARS-CoV-2 infection: the Polish experience
    Autorzy:
    Sierpiński, Radosław
    Pinkas, Jaroslaw
    Jankowski, Mateusz
    Juszczyk, Grzegorz
    Topór-Mądry, Roman
    Szumowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2116419.pdf
    Data publikacji:
    2020-10-20
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational exposure
    public health
    quarantine
    coronavirus infection
    patient isolation
    cross-sectional survey
    Opis:
    ObjectivesThe disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), termed COVID-19, is asymptomatic or mild in most cases. These patients do not need treatment in hospital and can be isolated at home. To date, most studies have been conducted among inpatients with severe COVID-19. In this study, the authors surveyed patients with mild COVID-19 who remained in home isolation, and analyzed the sources and occupational risk factors for SARS-CoV-2 infections.Material and MethodsThis cross-sectional study was carried out on April 17–18, 2020, among patients infected with SARS-CoV-2 who remained in home isolation in Poland. Data were acquired through a structured interview that included questions about the isolation course, symptoms, comorbidities, infection source, household characteristics, occupation, and workplace. Data were presented with descriptive statistics.ResultsOf the 4878 patients in home isolation, the authors were able to contact 3313. Of them, 1191 patients declined their invitation, and 2122 agreed to take part. The median age of the patients included in the study was 50 years; 59% were female. Most patients (92%) had not been abroad before the infection. More than half (55%) knew how they became infected; of them, 75% became infected at work. Of all patients, 70% were occupationally active. Nearly half of the occupationally active patients (48%) worked in healthcare, 3% worked in public administration or defense, 3% worked in transportation, and 2% worked in education. Sixty-five percent of the occupationally active patients worked in companies with >100 employees.ConclusionsMost of the patients with COVID-19 in home isolation in Poland were occupationally active, wherein the majority of people who were aware of the source of SARS-CoV-2 infection worked in healthcare. As most of the infected patients worked in companies with >100 employees, which is not a Polish employment pattern, the authors expect that smaller companies may have a lower risk of SARS-CoV-2 infections.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2020, 33, 6; 781-789
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructural Analysis of Asymmetric Dilution by Rotating Direct Metal Deposition
    Autorzy:
    Choi, Byungjoo
    Lee, Gwang-Jae
    Yeom, Hyun-Ho
    Lee, Moon-Gu
    Jeon, Yongho
    Powiązania:
    https://bibliotekanauki.pl/articles/356931.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rotating direct metal deposition
    asymmetric dilution
    cross-sectional analysis
    microstructure
    metallurgical composition
    Opis:
    In this study, cross-section analysis was performed on a novel rotating direct-metal deposition method capable of preliminary surface treatment and damage repair of cylindrical inner walls. The cross-sectional shape, microstructure, and metallurgical composition were analyzed to verify feasibility. No defects such as porosity or cracks were found in the cross section, but asymmetric dilution was observed because of the non-coaxial powder nozzle. Microstructural coarsening was confirmed over a higher dilution area by high-magnification optical microscope images. As the dilution ratio was increased, hard carbides in the dendrite were bulkdiffused into inter-dendrite spaces, and the toughness was lowered by Fe penetration into the deposit. Therefore, the increased laser heat input can be modulated to the typical dilution by decreasing the laser scanning velocity.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 535-538
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic beam resting on Vlasov elastic foundation and subjected to an external concentrated load
    Belka sprężysta spoczywająca na podłożu sprężystym Własowa o wybranych warunkach brzegowych
    Autorzy:
    Nagirniak, M.
    Rusakov, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084076.pdf
    Data publikacji:
    2021
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    elastic beam
    Vlasov foundation
    cross-sectional forces
    beam deflection
    displacement
    disappearance function
    Opis:
    The paper presents the problem of bending of a beam uniformly loaded along its entire length, resting freely on an elastic Vlasov foundation with an additional external load G applied to the ground at a distance a from the beam end. The given example is a special case of a beam resting freely on an elastic foundation, which is present in many cases of building practice. The paper considers an approximate solution for the influence of an additional load G on the deflection and cross-sectional forces of a beam resting freely on Vlasov elastic subsoil. Graphs of a deflection of the beam and of a soil surface layer beyond the limits of the beam, as well as graphs of bending moments and transverse forces in the beam have been presented. The influence of an additional load applied in a distance a on the deflection and cross-sectional forces in the beam has been investigated.
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2021, 20, 4; 29-35
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of Tunnel Cross-Sectional Area After Blastin
    Autorzy:
    Nguyen, Chi Thanh
    Nguyen, Nghia Viet
    Powiązania:
    https://bibliotekanauki.pl/articles/25212147.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    ANN
    SVR
    tunnel
    drilling-blasting method
    cross-sectional area of tunnel
    prediction
    tunele
    Opis:
    In this paper, two methods to predict and calculate the area of the tunnel face after the blasting were used. The first one is an artificial intelligence method using an artificial neural network system (ANN) model, and the second one – the support vector regression (SVR). After building predictive models for the area of the tunnel face after blasting by both methods, on the basis of comparing the results obtained in both methods, the performance of these models was assessed through the root mean square error RMSE and the coefficient of determination R2. RMSE and R2 values of the artificial neural network system (ANN) model were obtained as 0.1473 and 0.903 in training datasets, respectively. These values are 0.1497 and 0.9107 in testing datasets. In the SRV model, RMSE and R2 were equaled to 0.1228 and 0.9331 in training datasets, respectively. These values are 0.1708 and 0.9055, respectively in testing datasets. It can be concluded that artificial intelligence using ANN and SVM models can be used to predict the area of the tunnel face after blasting with high accuracy.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 39--47
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On a Production Function of European Countries: An Empirical Study
    O funkcji produkcji w krajach europejskich: studium empiryczne
    Autorzy:
    Mazurek, Jiří
    Powiązania:
    https://bibliotekanauki.pl/articles/633277.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    badanie przekrojowe
    funkcja produkcji
    kraje europejskie
    cross‑sectional study
    production function
    European countries
    Opis:
    Celem niniejszego artykułu jest zbadanie zgodności dopasowania kilku zagregowanych funkcji produkcji, w tym funkcji Cobba‑Douglasa, modelu Mankiwa, Romera i Weila czy specyfikacji Mincera dla zestawu 30 krajów europejskich w okresie 2006–2015. Zmienną zależną był wynik gospodarczy wyrażony realnym PKB, natomiast zbiór zmiennych niezależnych obejmował siłę roboczą, kapitał fizyczny, kapitał ludzki, wydajność pracy czy poziom technologii. Głównym odkryciem artykułu jest stwierdzenie, że wszystkie wyżej wymienione zagregowane funkcje produkcji były wyjątkowo dobrze dopasowane do danych empirycznych, przy skorygowanych współczynnikach determinacji powyżej 0,95. Stwierdzono również, że włączenie innych zmiennych makroekonomicznych, takich jak wydajność pracy, kapitał ludzki lub poziom technologii do dwuskładnikowej funkcji Cobba‑Douglasa, nie spowodowało znaczącej poprawy zgodności dopasowania.
    The aim of this paper is to examine the goodness‑of‑fit of several aggregated production functions including the Cobb‑Douglas function, the Mankiw, Romer and Weil model, or Mincer’s specification for a set of 30 European countries during the period 2006–2015. The dependent variable was economic output measured in real GDP, while the set of independent variables included labour, physical capital, human capital, labour productivity or technology level. The main finding of the paper is that all the above‑mentioned aggregate production functions fitted the data exceptionally well, with the adjusted coefficients of determination above 0.95. Also, it was found that the inclusion of other macroeconomic variables, such as labour productivity, human capital or technology level to the two‑factor Cobb‑Douglas function did not result in a significantly better goodness‑of‑fit.
    Źródło:
    Comparative Economic Research. Central and Eastern Europe; 2018, 21, 2; 25-35
    1508-2008
    2082-6737
    Pojawia się w:
    Comparative Economic Research. Central and Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work Ability and Musculoskeletal Disorders Among Workers From a Public Health Institution
    Autorzy:
    Monteiro, M. S.
    Alexandre, N. M. C.
    Ilmarinen, J.
    Rodrigues, C. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/89943.pdf
    Data publikacji:
    2009
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    work-related musculoskeletal disorders (WMDs)
    work ability
    work ability index
    cross-sectional studies
    Opis:
    Objective. The study investigated the associations between diagnosed musculoskeletal disorders (MSD), work ability and demographics, work and lifestyle characteristics in a public health institution with a variety of occupations. Methods. A cross-sectional study was carried out in a public health institution in Brazil. The subjects (n = 168) aged 20–69 answered a questionnaire on demographics, work, lifestyle characteristics and the work ability index. Results. A univariate regression analysis was carried out with the presence of MSD as a dependent variable. Association was found in relation to the age group, type of work demand, tenure at the institution, body mass index, work in the nutrition and laundry sectors, being a maid in the previous job, auxiliary service and auxiliary maintenance occupations, work ability in relation to physical and mental demands, estimated work impairment due to diseases, sick leave in the past year, own prognosis of work ability in 2 years’ time and mental resources: enjoying daily activities, being active and alert, being full of hope for the future. Conclusion. The presence of MSD affected several aspects of work ability.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2009, 15, 3; 319-324
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study of character strengths, work engagement and subjective well-being in Chinese registered nurses
    Autorzy:
    Ding, Xiaotong
    Kan, Houming
    Chu, Xueqin
    Sun, Chenyu
    Ruan, Feiyan
    Powiązania:
    https://bibliotekanauki.pl/articles/2118794.pdf
    Data publikacji:
    2022-09-05
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    nurse
    work engagement
    subjective well-being
    cross-sectional study
    character strengths
    mediating effect
    Opis:
    Background: Nurses displayed low levels of subjective well-being and high turnover intention. How to enhance the subjective well-being and decrease the turnover rate of nurses is of great importance. However, little is known about whether work engagement mediates between character strengths and subjective well-being. The study aims to explore character strengths, work engagement and subjective well-being in nurses, and to determine whether work engagement plays a mediating role between the relationship. Material and Methods: From December 2017 to December 2018, 450 Chinese registered nurses completed the character strengths scale, work engagement scale, and subjective well-being scale. The relationship between study variables was tested by Pearson correlation. The mediating effect of work engagement was tested by the bootstrap method. Results: The results indicated the following: (1) the 4 elements of character strengths and work engagement were significantly and positively correlated with subjective well-being; (2) character strengths could significantly predict both work engagement and subjective well-being; (3) work engagement played a mediating role in this relationship. Conclusions: Character strengths affect subjective well-being in Chinese registered nurses, and work engagement plays a mediating variable among the relations. Therefore, nurses are encouraged to foster their character strengths and improve their level of work engagement for their subjective well-being. Following the results, the study recommends that nursing managers be aware of the importance of using character strengths in nursing work, taking actions to excavate nurses’ character strengths and encouraging nurses to use character strengths in clinical work to promote engagement and well-being. In the meantime, interventions to improve the level of subjective well-being based on nurses’ character strengths should be considered.
    Źródło:
    Medycyna Pracy; 2022, 73, 4; 294-304
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association between metabolic syndrome and disability due to low back pain among care workers
    Autorzy:
    Tsuboi, Yamato
    Ueda, Yuya
    Sugimoto, Taiki
    Naruse, Fumihiro
    Ono, Rei
    Powiązania:
    https://bibliotekanauki.pl/articles/2161781.pdf
    Data publikacji:
    2017-11-03
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    metabolic syndrome
    Disability
    low back pain
    healthcare workers
    cross-sectional studies
    epidemiological studies
    Opis:
    Objectives: To elucidate the association between metabolic syndrome (MetS) and disability due to low back pain (LBP) among care workers. Material and Methods: This cross-sectional study enrolled 656 care workers having experienced LBP in the year prior to the year of this study. The Roland-Morris Disability questionnaire (RDQ) and self-reported questionnaires regarding LBP, fear of movement, depressive symptom, psychosocial factors, intensity of pain, and duration of pain were administered, and a medical examination was performed. Metabolic syndrome was defined according to the international definition agreed in 2009. Out of the 656 care workers, we included 316 care workers (response rate: 48.2%) who had fully completed the questionnaires as the study sample (males: 13.6%, median age = 51 years old, range: 35–74 years old). To examine the association between MetS and the level of disability due to LBP, we used the Poisson regression analysis and estimated crude and adjusted prevalence ratios (PR). Results: Out of the 316 care workers, 52 (16.5%) were diagnosed as having MetS. Metabolic syndrome was significantly associated with the RDQ score (adjusted PR: 1.57, 95% confidence interval (CI): 1.17–2.11) after adjusting for covariates, such as age, sex, fear of movement, job demands, social support, intensity of pain, and duration of pain. Conclusions: This study showed that MetS was independently associated with disability due to LBP among care workers. A multidisciplinary intervention taking MetS into consideration may be an effective way to reduce disability due to LBP in people with both LBP and MetS. Int J Occup Med Environ Health 2018;31(2):165–172
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 2; 165-172
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work ability of aging teachers in Bulgaria
    Autorzy:
    Vangelova, Katya
    Dimitrova, Irina
    Tzenova, Bistra
    Powiązania:
    https://bibliotekanauki.pl/articles/2162012.pdf
    Data publikacji:
    2018-10-23
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    ageing
    teachers
    work ability index
    work ability
    cross-sectional study
    adverse health effects
    Opis:
    Objectives The work ability of aging teachers is of special interest because of high risk of stress. The aim of the study was to follow the work ability of aging teachers and compare it with that of aging non-teacher professionals. Material and Methods The study included 424 teachers of age ≤ 44 years old (N = 140) and ≥ 45 years old (N = 284), with about 10% male teachers in both age groups, matched by sex and age with non-teacher professionals. Work ability was assessed by means of the Work Ability Index (WAI). Chi2 tests and regression analyses were used for studying WAI scales ratings, diagnosed by physician diseases and WAI ratings. Results Our data shows comparatively high work ability for both age groups of teachers but WAI of aging teachers was significantly lower in comparison to their younger colleagues as well as aging non-teacher professionals. About 80% of aging groups reported diseases diagnosed by physicians. Cardiovascular, musculoskeletal and respiratory diseases were the most frequently reported by aging teachers, while teachers ≤ 44 years old reported respiratory, cardiovascular, neurological and sensory diseases. With aging significantly higher rates of arterial hypertension, diabetes, injury to hearing and mental disorders were reported by teachers as compared to aging non-teacher professionals. The rates of reported repeated infections of respiratory tracts were high in both age groups of teachers, especially in the group of aging teachers. The estimated work ability impairment due to the disease showed the significant effect of aging for teachers as well as the significant difference when comparing aging teachers and non-teacher professionals. Conclusions Our data shows high work ability for both age groups of teachers but significantly lower for aging teachers accompanied with higher rates of psychosomatic diseases, including hearing impairment and respiratory diseases. Preservation of teacher health could contribute to maintenance of their work ability and retention in the labor market. Int J Occup Med Environ Health 2018;31(5):593–602
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 5; 593-602
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work Ability of Workers in Different Age Groups in a Public Health Institution in Brazil
    Autorzy:
    Monteiro, M. S.
    Ilmarinen, J.
    Filho, H. R. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/89793.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    aging workers
    work ability index
    cross-sectional study
    zdolność do pracy
    Brazylia
    starsi pracownicy
    Opis:
    Objectives. The aim of this study was to determine the associations between demographics, work, lifestyle, housework, and the work ability of workers. Methods. Employees between the ages of 20 and 69 (N = 651), employed at a Brazilian public institution, responded to a questionnaire on demographics, work, lifestyle characteristics, and work ability. Results. Work ability decreased significantly with age among the women. The younger group had higher scores on the work ability index than the older age groups, except for mental resources. The logistic regression analysis showed that higher age, lower education, and long work history at the institution were significantly associated with reduced work ability. Conclusions. The progressive aging, the low level of education, and the long duration work in the studied institution were related to a reduction in work ability, which increases the risk of work disability or early retirement.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 4; 417-427
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Styl życia studentów Śląskiego Uniwersytetu Medycznego w Katowicach w latach 2005 i 2020
    Lifestyle of students of Medical University of Silesia, Katowice, Poland, in years 2005 and 2020
    Autorzy:
    Klocek, Tomasz S.
    Witek, Przemysław
    Wawrzonkowski, Patryk
    Binek, Aleksandra
    Woźniak, Nadia
    Krzych, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2130430.pdf
    Data publikacji:
    2022-10-18
    Wydawca:
    Śląski Uniwersytet Medyczny w Katowicach
    Tematy:
    styl życia
    kwestionariusz
    studenci medycyny
    badanie przekrojowe
    lifestyle
    questionnaire
    medical students
    cross-sectional study
    Opis:
    WSTĘP: Styl życia jest szerokim pojęciem i ma duży wpływ na zdrowie. Zmienia się na przestrzeni czasu pod wpływem doniesień naukowych, trendów społecznych i indywidualnych uwarunkowań. Celem pracy było międzypokoleniowe porównanie stylu życia studentów Śląskiego Uniwersytetu Medycznego w Katowicach (SUM). MATERIAŁ I METODY: Badanie przekrojowe przeprowadzono z wykorzystaniem autorskiego kwestionariusza. W badaniu uczestniczyły dwie grupy liczące po 221 osób, studenci kierunków medycznych w latach 2003–2005 i w roku 2020. Do oceny stylu życia użyto rekomendacji Światowej Organizacji Zdrowia, a zmienne zaklasyfikowano jako ,,zdrowy nawyk” lub ,,niezdrowy nawyk”. WYNIKI: Studenci w roku 2020 wykazywali ,,zdrowsze” zachowania w porównaniu ze studentami z lat 2003–2005, jeśli chodzi o regularność spożywania posiłków (p = 0,02), rzadsze spożycie posiłków z dużą zawartością soli kuchennej (p = 0,03), częstsze spożycie warzyw i owoców (p < 0,01) oraz dłuższy sen (p < 0,01); zwiększyły się natomiast używanie kofeiny (p = 0,02), częstość spożywania napojów alkoholowych (p = 0,04) oraz liczba osób odczuwających stres (p < 0,01), który dla większości był destabilizujący (p < 0,01). WNIOSKI: Styl życia studentów kierunków medycznych na przestrzeni 15 lat poprawił się w zakresie nawyków żywieniowych. Zmiany niekorzystne dotyczą spożycia alkoholu i odczuwania stresu.
    INTRODUCTION: Lifestyle is a broad concept with a large impact on health. It changes over time under the influence of scientific reports, social trends and individual conditions. The aim of this study was to make an intergenerational comparison of the lifestyle of students of the Medical University of Silesia, Katowice, Poland. MATERIAL AND METHODS: A cross-sectional study was conducted using the author’s own questionnaire. Two groups of 221 subjects each, medical students in 2003–2005 and 2020, participated in the study. Recommendations of the World Health Organization were used to assess lifestyle and the variables were classified as “healthy” or “unhealthy”. RESULTS: The students in 2020 exhibited “healthier” behaviors compared to the students in 2003–2005 in terms of the regularity of meals (p = 0.02), less frequent consumption of meals with a high salt content (p = 0.03), more frequent consumption of fruits and vegetables (p < 0.01) and longer sleep periods (p < 0.01). In contrast, caffeine use (p = 0.02), the frequency of alcoholic beverage consumption (p = 0.04) and the number of people experiencing stress (p < 0.01), which was destabilizing for most (p < 0.01), increased. CONCLUSIONS: The lifestyle of medical students improved over 15 years in terms of eating habits. Unfavorable changes are related to alcohol consumption and perceived stress.
    Źródło:
    Annales Academiae Medicae Silesiensis; 2022, 76; 112-117
    1734-025X
    Pojawia się w:
    Annales Academiae Medicae Silesiensis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Working conditions during the COVID-19 pandemic in primary and tertiary healthcare: a comparative cross-sectional study
    Autorzy:
    Aulanko, Ida
    Sanmark, Enni
    Oksanen, Lotta
    Oksanen, Sampo
    Lahdentausta, Laura
    Kivimäki, Anne
    Paju, Susanna
    Pietiäinen, Milla
    Pussinen, Pirkko
    Geneid, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/2203020.pdf
    Data publikacji:
    2023-03-02
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    COVID-19
    SARS-CoV-2
    pandemics
    health personnel
    surveys and questionnaires
    cross-sectional studies
    Opis:
    Objectives The COVID-19 pandemic has globally affected healthcare workers’ (HCWs) health and wellbeing. Most studies on COVID-19 have focused on tertiary healthcare. The aim of this study was to increase the knowledge on the effects of the pandemic on working conditions in tertiary and primary healthcare. Material and Methods The comparative cross-sectional study consisted of an online questionnaire sent to HCWs of the City of Helsinki (primary healthcare) and Helsinki University Hospital (tertiary healthcare). Altogether 1580 HCWs with direct patient contact participated in the study: 895 from tertiary and 685 from primary healthcare. Statistical analysis used SPSS 25 from IBM. The tests used were the χ² test, Fisher’s exact test, and binary logistic regression analysis. Results Primary HCWs were less likely to treat COVID-19 patients (OR = 0.45, 95% CI: 0.37–0.56). However, both groups reported a similar number of COVID-19 infections, primary HCWs 4.9% and tertiary HCWs 5.0%, and workrelated quarantine was significantly more prevalent (OR = 1.96, 95% CI: 1.38–2.79) among primary HCWs. In addition, work-related wellbeing was poorer among primary HCWs than tertiary HCWs in terms of feeling more stressed at work (OR = 3.20, 95% CI: 2.55–4.02), not recovering from work (OR = 0.49, 95% CI: 0.39–0.62), reported mental wellbeing below normal levels (OR: 1.59, 95% CI: 1.26–2.00), and increased working hours (OR = 1.63, 95% CI: 1.25–2.12). Conclusions The study demonstrates how the pandemic has affected the wellbeing and working conditions of not only tertiary but also less studied primary HCWs. The authors’ findings suggest that the challenges identified during the COVID-19 pandemic in the health and wellbeing of healthcare workers are even greater in primary care than in tertiary care. Int J Occup Med Environ Health. 2023;36(1):139–50
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 1; 139-150
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sleep duration and metabolic syndrome
    Autorzy:
    Kawada, Tomoyuki
    Powiązania:
    https://bibliotekanauki.pl/articles/2168365.pdf
    Data publikacji:
    2016-11-18
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    short sleep duration
    long sleep duration
    metabolic syndrome
    cross-sectional study
    sex difference
    causality
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 6; 877-878
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Working conditions during the COVID-19 pandemic in primary and tertiary healthcare: a comparative cross-sectional study
    Autorzy:
    Aulanko, Ida
    Sanmark, Enni
    Oksanen, Lotta
    Oksanen, Sampo
    Lahdentausta, Laura
    Kivimäki, Anne
    Paju, Susanna
    Pietiäinen, Milla
    Pussinen, Pirkko
    Geneid, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/2188906.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    COVID-19
    SARS-CoV-2
    pandemics
    health personnel
    surveys and questionnaires
    cross-sectional studies
    Opis:
    Objectives The COVID-19 pandemic has globally affected healthcare workers’ (HCWs) health and wellbeing. Most studies on COVID-19 have focused on tertiary healthcare. The aim of this study was to increase the knowledge on the effects of the pandemic on working conditions in tertiary and primary healthcare. Material and Methods The comparative cross-sectional study consisted of an online questionnaire sent to HCWs of the City of Helsinki (primary healthcare) and Helsinki University Hospital (tertiary healthcare). Altogether 1580 HCWs with direct patient contact participated in the study: 895 from tertiary and 685 from primary healthcare. Statistical analysis used SPSS 25 from IBM. The tests used were the χ² test, Fisher’s exact test, and binary logistic regression analysis. Results Primary HCWs were less likely to treat COVID-19 patients (OR = 0.45, 95% CI: 0.37–0.56). However, both groups reported a similar number of COVID-19 infections, primary HCWs 4.9% and tertiary HCWs 5.0%, and workrelated quarantine was significantly more prevalent (OR = 1.96, 95% CI: 1.38–2.79) among primary HCWs. In addition, work-related wellbeing was poorer among primary HCWs than tertiary HCWs in terms of feeling more stressed at work (OR = 3.20, 95% CI: 2.55–4.02), not recovering from work (OR = 0.49, 95% CI: 0.39–0.62), reported mental wellbeing below normal levels (OR: 1.59, 95% CI: 1.26–2.00), and increased working hours (OR = 1.63, 95% CI: 1.25–2.12). Conclusions The study demonstrates how the pandemic has affected the wellbeing and working conditions of not only tertiary but also less studied primary HCWs. Our findings suggest that the challenges identified during the COVID-19 pandemic in the health and wellbeing of healthcare workers are even greater in primary care than in tertiary care.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 1; 139-150
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Health-related quality of life in children and adolescents after systemic sting reaction
    Autorzy:
    Brzyski, P.
    Cichocka-Jarosz, E.
    Tarczoń, I.
    Jedynak-Wąsowicz, U.
    Tomasik, T.
    Lis, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082925.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    health-related quality of life
    children
    adolescents
    insect sting
    Hymenoptera venom allergy
    cross-sectional study
    Opis:
    Introduction and objectives. Insect stings are the second trigger of anaphylaxis in children and adolescents, causing a potentially life-threatening reactions. Hence health-related quality of life (HRQoL) is an important issue for Hymenoptera venom allergy (HVA) patients. The aim of this cross-sectional study was to evaluate the impact of HVA on young patients’ HRQoL, including their socio-demographic characteristics. Materials and method. The study sample included 102 patients aged 8–17 (Mean 12.5 years, SD=3.0), who were under diagnosis or venom immunotherapy due to systemic reaction after an insect sting in one of the tertiary referential centers in Poland. They were mostly boys (70%), and mainly from rural areas (63%). HRQoL of studied patients was measured with the Children’s Hymenoptera Venom Allergy Quality of Life Scale, a questionnaire covering 6 dimensions: anxiety, caution, limitations, discomfort, support received from parents and a feeling of safety, each measured from 1 to 5. Independent predictors of HRQoL were estimated using the Generalized Linear Model. Results. In the group of children being dermal reactors, girls reported a higher level of anxiety (B=1.17, 95%CI=(0.30;2.03), p=0.008). In the group of children with grade 2 it was the girls who reported lower anxiety (B=-1.33, 95%CI=(-2.38;-0.29), p=0.013). Boys treated longer than 3 years had their level of anxiety significantly lower than those studied at diagnosis (B=-0.65, 95%CI=(-1.23;-0.07), p=0.028). The feeling of safety was higher in children living in villages than in those living in towns (B=0.30, 95%CI=(0.03;0.56), p=0.031). Conclusions. The gender, treatment duration and stage of anaphylactic reaction influenced level of anxiety. The level of feeling of safety was related to the place of living.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2019, 26, 1; 103-108
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyczynek do oceny stanu zarysowania belek z betonu zbrojonego prętami BFRP
    On assessment of cracking of concrete beams reinforced with BFRP bars
    Autorzy:
    Urbański, M.
    Łapko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/390578.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    BFRP
    sztywność na zginanie
    beton
    pręt BFRP
    zarysowanie
    cross-sectional stiffness
    concrete
    basalt bars
    cracking behavior
    Opis:
    W pracy przedstawiono analizę porównawczą doświadczalnych i obliczonych teoretycznie szerokości rys w jednoprzęsłowych belkach swobodnie podpartych zbrojonych prętami bazaltowymi BFRP (Basalt Fibre Reinforced Polymers). Belki typu BFRP wykonano z betonu C30/37 ze zbrojeniem dolnym na zginanie prętami bazaltowymi o średnicy 8 mm, dodatkowo wykonano belki referencyjne ze zbrojeniem stalowym tej samej średnicy. Badano ugięcia i zarysowania oraz nośność belek zbrojonych prętami BFRP, o cechach wytrzymałościowych określonych w testach na rozciąganie. Wykazano, że znacznie zredukowana sztywność elementów zbrojonych prętami bazaltowymi BFRP wywołuje kilkakrotnie większe szerokości rys w porównaniu z belkami zbrojonymi prętami stalowymi o tym samym przekroju poprzecznym.
    This paper presents a comparative analysis of experimental and theoretical crack widths of simply supported beams reinforced with BFRP rebar (Basalt Fiber Reinforced Polymers). The tested BFRC model beams have been made of concrete class C30/37 and of bottom flexural basalt bars 8 mm in diameter. The reference RC beams with traditional flexural steel reinforcement have been additionally made of the same diameter. Beam deflections, concrete crack widths and strength capacity of beams reinforced with BFRP bars as well as with traditional steel bars have been registered. It has been shown that crack widths of beams reinforced with BFRP bars have been much (three to four times) higher than in the beams reinforced traditionally
    Źródło:
    Budownictwo i Architektura; 2014, 13, 3; 201-208
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic moduli of carbon nanotubes with new geometry based on FEM
    Autorzy:
    Fereidoon, A.
    Rajabpour, M.
    Hemmatian, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/279985.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    elastic moduli
    elliptic single walled carbon nanotubes
    length
    chirality
    cross sectional aspect ratio
    finite element model
    Opis:
    In this paper, the elastic moduli of elliptic single walled carbon nanotubes (ESWCNTs) are described. A three-dimensional finite element (FE) model for such carbon nanotubes is proposed. The covalent bonds are simulated by beam elements in the FE model. The elastic moduli of beam elements are ascertained from a linkage between molecular and continuum mechanics. The deformations of the FE model are subsequently used to predict the elastic moduli of ESWCNTs. In order to demonstrate the FE performance, the influence of length, chirality, diameter and cross sectional aspect ratios on the elastic moduli (Young’s modulus and shear modulus) of ESWCNTs is investigated. It is found that the cross sectional aspect ratio of ESWCNTs significantly affects the elastic moduli. With increasing cross sectional aspect ratio, the Young’s modulus and shear modulus decrease. As a result, every change in geometry operates as a defect and decreases the elastic moduli. With increasing the length, Young’s modulus increases and the shear modulus decreases.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 235-245
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ANALIZA LOKALNYCH ZALEŻNOŚCI PRODUKCJI PRZEMYSŁOWEJ NA PRZYKŁADZIE POWIATÓW WOJEWÓDZTWA LUBUSKIEGO
    ANALYSIS OF LOCAL DEPENDENCIES OF INDUSTRIAL PRODUCTION ON THE EXAMPLE OF POVIATS OF THE LUBUSKIE VOIVODESHIP
    Autorzy:
    Szczuciński, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/453389.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    rozwój lokalny
    powiaty
    dane przekrojowo-czasowe
    modele panelowe
    local development
    poviats
    cross-sectional time data
    panel models
    Opis:
    Rozwój lokalny rozumieć można jako proces wpływający na relacje między produkcją i konsumpcją oraz lokalne warunki życia na danym terytorium. W artykule przybliżono temat w przekroju powiatów województwa lubuskiego. Dokonano analizy opisowej struktury pracujących oraz zbadano zmiany wielkości produkcji sprzedanej przemysłu według powiatów. W celu modelowania zależności dotyczących kształtowania się produkcji sprzedanej, ze względu na specyfikę danych, użyto modele panelowe. Estymacji i weryfikacji, na tle zwykłego modelu regresji, poddano modele z efektami ustalonymi i losowymi.
    Local development can be understood as a process affecting the relation between production and consumption, and local living conditions in a given territory. The topic of the cross-section of poviats of the Lubuskie Voivodeship was presented in this dissertation. A descriptive analysis of the structure of employed was carried out and the changes in the volume of sold production of industry by poviats were examined. In order to model dependencies regarding the development of sold production, due to the specificity of the data, panel models were used. The models with fixed and random effects were subjected to estimation and verification in the context of the pooled regression model.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 3; 274-283
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Piggyback whorls: A new theoretical morphologic model reveals constructional linkages among morphological characters in ammonoids
    Autorzy:
    Ubukata, T
    Tanabe, K.
    Shigeta, Y.
    Maeda, H.
    Mapes, R.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/20269.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    morphospace
    morphology
    morphological data
    fossil animal
    constructional linkage
    ammonoid
    paleontology
    cross-sectional shape
    computer simulation
    shell growth
    morphological diversity
    Opis:
    A new theoretical morphological model is proposed for the analysis of growth, form and morphospace of ammonoid shells. In this model, the shape of a radial cross section through the shell is simulated by “piggybacking” of successive whorls. The “piggyback whorls model” is defined in terms of the enlarging rate of the perimeter and the proportion of the dorsal wall to the whorl periphery, if an isometric relationship is assumed between perimeter and area of the cross−sectioned whorl. Allometric coefficients on these growth parameters determine how compressed and evolute shells are formed. The present model successfully reproduced some correlations among purely geometric variables that have been reported in previous works and were also observed in our biometric analyses. This model yields a hypothesis of “constructional linkages” between aperture shape and coiling geometry that might provide a functional coupling between hydrostatic and hydrodynamic characters. The model may partly explain Buckman’s Law of Covariation between rib features and shell shapes.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nursing students’ perception of multiculturalism in nursing. Comparative study of nursing students from Poland, Turkey and Hungary
    Postrzeganie wielokulturowości w pielęgniarstwie przez studentów. Studium porównawcze studentów pielęgniarstwa z Polski, Turcji i Węgier
    Autorzy:
    Żółtańska, Joanna
    Grochulska, Agnieszka
    Lesińska-Sawicka, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/473149.pdf
    Data publikacji:
    2017-09-01
    Wydawca:
    Collegium Witelona Uczelnia Państwowa
    Tematy:
    studenci pielegniarstwa
    wielokulturowość
    badania przekrojowe
    pacjent odmienny kulturowo
    nursing students
    multiculturalism perceptions
    cross-sectional study
    patient with a different cultural background
    Opis:
    Wielokulturowość jest pojęciem wielowymiarowym. Istnienie wymiarów wielokulturowości uświadamia nam, że jest ona coraz bardziej powszechna. Relacje i wzajemne przenikanie się różnych tradycji, wzorów, sposobów myślenia i postawy wobec świata, Boga i ludzi stały się czymś nieuniknionym i nieodwołalnym we współczesnym świecie. Celem tego przekrojowego badania było ukazanie rozumienia przez studentów pielęgniarstwa pojęcia wielokulturowości i jego implikacje do sprawowania opieki nad pacjentem odmiennym kulturowo. Jest to badanie jakościowe z wykorzystaniem otwartych pytań w kwestionariuszu sporządzonym przez pierwszego autora. Niniejsze badanie zostało zrealizowane w okresie od października 2014 do stycznia 2015 roku. Próba pozykana została z 354 wolontariuszy, studentów pierwszego roku pielęgniarstwa studiów licencjackich z pięciu szkół w trzech krajach: Turcji, Polski i Węgier. Respondenci otrzymywali link do ankiety przez Internet. Wypełniali go w domu lub na uczelni. Pytania w ankiecie były przetłumaczona na języku kraju, z którego pochodzili uczestnicy badania. Studenci najczęściej wyjaśniali pojęcie wielokulturowości z punktu widzenia zjawiska społecznego (50,2%). Uczestnicy badania określali osobę odmienną kulturowo przede wszystkim jako członka innej narodowości (46,67%). Respondenci wykazali otwartość na spotkanie z odmiennym kulturowo pacjentem, a 84,13% z nich stwierdziła, że chciałaby samodzielnie nawiązać kontakt z pacjentem pozostającym pod ich opieką. Występują różnice w definiowaniu pojęcia przez studentów w zależności od kraju.
    Multiculturalism is a multi-dimensional concept. The existence of dimensions of multiculturalism makes us realize that it is becoming more and more ubiquitous. Relations and interference of different traditions, patterns, ways of thinking and attitudes towards the world, God and other people have become something inevitable and irrevocable in contemporary world. The aim of this cross-sectional study was to show the nursing students’ understanding of the concept of multiculturalism and its implications for taking care of a patient with a different cultural background. This is a qualitative study using an open-ended questionnaire developed by one of the authors. It was conducted between October 2014 and January 2015 among 354 voluntary first year undergraduate nursing students from five schools in three countries: Turkey, Poland and Hungary. The participants were emailed a link and completed the survey at home or school. The survey questions were translated in the respondents’ native languages. The students most often perceive multiculturality as a social phenomenon (50,2%). The participants of the study primarily defined a person with a different cultural background as a member of a different nationality (46,67%). The respondents expressed their readiness to meet a patient with a different cultural background and 84,13% of them declared that they would like to have contact with such a patient under their care. There are differences in defining the aforementioned concept by students from different countries. Although the students demonstrate open attitudes towards patients with different cultural backgrounds than their own one, their knowledge should be systematised. This will give them a greater certainty as to the validity of their actions, and thereby it will be easier to eliminate stereotypes and prejudice among them.
    Źródło:
    Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy; 2017, 3, 24
    1896-8333
    Pojawia się w:
    Zeszyty Naukowe Państwowej Wyższej Szkoły Zawodowej im. Witelona w Legnicy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prevalence of Musculoskeletal Disorders at Workplaces in the Peoples Republic of China
    Autorzy:
    Bao, S.
    Winkel, J.
    Shahnavaz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/90895.pdf
    Data publikacji:
    2000
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomics
    epidemiology
    cross-sectional study
    low back pain
    shoulder-neck disorders
    developing countries
    assembly workers
    ergonomia
    epidemiologia
    ból pleców
    kraje rozwijające się
    Opis:
    This paper presents 2 musculoskeletal disorders questionnaire surveys in 10 different Chinese occupational groups. Data collected from 1,603 workers using a modified Nordic musculoskeletal disorders symptom questionnaire showed that the 12-month prevalence of musculoskeletal disorders, particularly in the low back and shoulder-neck regions, was high at many Chinese workplaces. Significant differences existed between occupational groups. Assembly workers usually had higher neck-shoulder complaints compared to workers in most other occupations. However, the nature of assembly seemed also to influence the prevalence rate. Workers at a cassette recorder and a TV set assembly plant appeared to have more neck complaints compared with a group of thermos flask assemblers.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2000, 6, 4; 557-574
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Fiber Cross Sectional Shape and Weave Pattern on Thermal Comfort Properties of Polyester Woven Fabrics
    Wpływ przekroju poprzecznego włókien oraz splotów tkackich na właściwości komfortu cieplnego tkanin poliestrowych
    Autorzy:
    Karaca, E.
    Kahraman, N.
    Omeroglu, S.
    Becerir, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/231887.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    krzyż kształt przekroju
    poliester
    przepuszczalność pary wodnej
    przepuszczalność powietrza
    właściwości termiczne
    wzór splot
    air permeability
    cross sectional shape
    polyester
    thermal properties
    water vapour permeability
    weave pattern
    Opis:
    Thermal comfort properties, i.e. thermal conductivity, thermal absorption and thermal resistance, and the water vapour and air permeabilities of fabrics woven from different cross sectional shaped polyester fibres were investigated. A total of eight woven fabrics were produced in two different weave patterns (plain and twill) from polyester yarns of four different fibre cross sectional shapes (round, hollow round, trilobal and hollow trilobal). The fabrics consisting of hollow fibres had higher thermal conductivity and thermal absorption values but lower thermal resistance, water vapour and air permeability values than their counterparts of solid fibres. The twill fabrics produced from trilobal fibres showed the lowest thermal conductivity and thermal absorption but the highest thermal resistance, water vapour and air permeability.
    Badano właściwości komfortu cieplnego tkanin: przewodność termiczną, absorpcję oraz opór termiczny, jak również przepuszczalność pary wodnej i powietrza. Wyprodukowano 8 tkanin stosując dwa różne sploty (płócienny i ukośny) z przędz poliestrowych wykonanych z włókien o czterech różnych kształtach przekroju poprzecznego (okrągły, okrągły z otworem, trójkątny, trójkątny z otworem). Włókna z lumenem posiadały wyższą przewodność termiczną i współczynnik absorpcji, a niższą oporność termiczną, przepuszczalność pary wodnej i powietrza w stosunku do tkanin z włókien o pełnym przekroju. Tkaniny o splocie skośnym z włóknami o przekroju trójkątnym wykazywały najniższą przewodność termiczną i współczynnik absorpcji ale najwyższą oporność termiczna oraz przepuszczalność pary wodnej i powietrza.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2012, 3 (92); 67-72
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CROSS-SECTIONAL RETURNS FROM DIVERSE PORTFOLIO OF EQUITY INDICES WITH RISK PREMIA EMBEDDED
    Autorzy:
    Sakowski, Paweł
    Ślepaczuk, Robert
    Wywiał, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/453405.pdf
    Data publikacji:
    2015
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
    Tematy:
    cross-sectional models
    asset pricing models
    equity risk premium
    equity indices
    new risk factors
    sensitivity analysis
    book to market
    momentum
    market price of risk
    emerging and developed equity indices
    Opis:
    The main purpose of this article is to extend evaluation of classic Fama-French and Carhart model for global equity indices. We intend to check the robustness of models results when used for a wide set of equity indices instead of single stocks for the given country. Such modification enables us to estimate equity risk premium for a single country. However, it requires several amendments to the proposed methodology for single stocks. Our empirical evidence reveals important differences between the conventional models estimated on single stocks, either international or US-only, and models incorporating whole markets. Our novel approach shows that the divergence between indices of the developed countries and those of emerging markets is still persistent. Additionally, research on weekly data for equity indices presents rationale for explanation of equity risk premia differences between variously sorted portfolios.
    Źródło:
    Metody Ilościowe w Badaniach Ekonomicznych; 2015, 16, 2; 89-101
    2082-792X
    Pojawia się w:
    Metody Ilościowe w Badaniach Ekonomicznych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza Monte Carlo własności testów kointegracji dla panelowego procesu var z międzyprzekrojowymi wektorami kointegrującymi
    Monte Carlo comparison of LCCA- and ML-based cointegration tests for panel var process with cross-sectional cointegrating vectors
    Autorzy:
    Kębłowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/964888.pdf
    Data publikacji:
    2018
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    międzyprzekrojowe wektory kointegrujące
    analiza korelacji kanonicznej
    testy kointegracji
    panelowy model VAR
    procedura Boxa i Tiao
    cross-sectional cointegrating vectors
    canonical correlation analysis
    cointegration tests
    panel var model
    box and tiao approach
    Opis:
    Small-sample properties of bootstrap cointegration rank tests for unrestricted panel VAR process are considered when long-run cross-sectional dependencies occur. It is shown that the bootstrap cointegration rank tests for the panel VAR model based on levels canonical correlation analysis are oversized, whereas the bootstrap cointegration rank tests based on maximum likelihood framework are undersized. Moreover, the former tests are in general outperformed by the latter in terms of performance. The results of the investigation indicate that the ML-based bootstrap cointegration rank tests perform well in small samples for small-sized panel VAR models with a few cross-sections.
    W artykule przedstawiono wyniki badania własności bootstrapowych testów kointegracji dla panelowego procesu VAR z międzyprzekrojowymi wektorami kointegrującymi. Wyniki badania wskazują, że bootstrapowe testy kointegracji dla modelu PVAR, które oparte są na analizie korelacji kanonicznej poziomów, cechują się przeszacowaniem rozmiaru testu, z kolei bootstrapowe testy kointegracji dla modelu PVAR wywiedzione z metody największej wiarygodności charakteryzują się zwykle niedoszacowaniem rozmiaru testu. Wykazano również, że bootstrapowe testy kointegracji dla modelu PVAR wywiedzione z metody największej wiarygodności cechują się zwykle lepszymi własnościami ze względu na moc testu. Wyniki badania wskazują, że własności bootstrapowych testów kointegracji dla modelu PVAR wywiedzionych z metody największej wiarygodności cechują się satysfakcjonującymi własnościami małopróbkowymi dla małowymiarowych modeli PVAR z ograniczoną liczbą przekroi.
    Źródło:
    Przegląd Statystyczny; 2018, 65, 2; 173-182
    0033-2372
    Pojawia się w:
    Przegląd Statystyczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zagadnienie ścinania w żelbetowych belkach zespolonych o przekroju teowym
    Shear problem of T-sectional composite reinforced concrete beams
    Autorzy:
    Jabłoński, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/390359.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    żelbetowe belki zespolone
    ścinanie
    praca podporowa
    przekrój teowy
    composite reinforced concrete beam
    shear
    support running
    T-sectional cross
    Opis:
    Artykuł przedstawia dane literaturowe dotyczące zagadnienia ścinania w belkach żelbetowych zespolonych o przekroju teowym – ich pracy w strefach przypodporowych oraz styku. Na wstępie przedstawiono gdzie w praktyce budowlanej występują elementy zespolone o przekroju teowym. Następnie przeanalizowano sposoby ustalania parametrów geometrycznych (według zaleceń normowych [12,14]) przekrojów teowych w belkach monolitycznych oraz belkach zespolonych ze stykiem nierozwarstwionym lub zarysowanym. W celu opanowania istoty zagadnienia przestudiowano literaturę [6,7,8,9] oraz normy [12,13] w zakresie ścinania w strefach przypodporowych oraz między środnikiem a półką jednorodnych przekrojów teowych. Przechodząc do rozpoznania meritum zagadnienia skoncentrowano się na: ścinaniu w styku między prefabrykatem a betonem monolitycznym, pracy stref przypodporowych zginanych belek zespolonych oraz uzupełniono wiadomości o ścinaniu w stropach gęsto żebrowych [3,5,12,14,15,16]. Na zakończenie zrelacjonowano najistotniejsze badania w aspekcie ścinania i pracy styku belek zespolonych o przekroju teowym [3,4,10,11] oraz wyprowadzono wnioski dla badań własnych.
    The article presents data available in the literature concerning shear problem of composite concrete T-beams - their running in support zone and contact surface. To begin with presented where are in the civil engineering T-sectional composite elements. Following made an analysis of method for geometric buckling (according to standards [12,14]) T-sections of monolithic and composite beams without and with cracked contact surfaces. There were also literature [6,7,8,9] and standards [12,13] studies in field of support zone and between flange and web shearing solid T-beams in order to know the matter. In the essence of problem concentrated on: horizontal shearing in contact surface between precast and cast in place components, running support zone of bending composite beams and complete rib-and-slab floors’ sharing data [3,5,12,14,15,16]. At the end reported the most important researches in shearing and running contact surface of composite T-beams [3,4,10,11] also draw a conclusions to my own work.
    Źródło:
    Budownictwo i Architektura; 2011, 9, 2; 5-22
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of effective width of flange on calculation and reinforcement dimensioning of beam of reinforced concrete frame
    Wpływ szerokości współpracującej płyty na obliczenia i wymiarowanie zbrojenia rygla ramy żelbetowej
    Autorzy:
    Solarczyk, Maciej Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1403625.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    reinforced concrete structures
    effective width of flange
    minimum cross sectional area of reinforcement
    PN-EN 1992-1-1:2008
    PN-B-03264:2002
    konstrukcje żelbetowe
    szerokość efektywna półki
    minimalne pole przekroju zbrojenia rozciąganego
    Opis:
    The article analyses the impact of modeling the cross-section of two-nave and two-storey reinforced concrete frame with dimensions: 18.0 m × 32.0 m as a bars on the results of bending moments, the value of elastic deflection and dimensioning of reinforcement due to bending. Six options were considered: a beam as a rectangular section and five T-beam variants with different definition of effective flange width. The differences in obtained results were commented. Conclusions useful for the designing of reinforced concrete structures were presented. The procedure for determining the effective flange width in the context of PN-EN 1992-1-1:2008 and PN-B 03264:2002 standards with a commentary on the use of effective flange width in calculations and construction of reinforcement in reinforced concrete structures were described. Brief description of determining the reinforcement due to bending according to simplified method given in PN-EN 1992-1-1:2008 was presented. In addition, the standard formula for determining the minimum cross sectional area of reinforcement (9.1N) in PN-EN 1992-1-1:2008 with a proposal for its strict determination for the T-beam with a flange in the tensile zone was analyzed.
    W artykule przeanalizowano wpływ modelowania przekroju rygla dwunawowej, dwukondygnacyjnej ramy żelbetowej o wymiarach: 18,0 m × 32,0 m za pomocą elementów prętowych na wyniki momentów zginających, wartość ugięcia sprężystego oraz wymiarowanie zbrojenia z uwagi na zginanie. Rozważono sześć możliwości: rygiel jako belka prostokątna oraz pięć wariantów belki teowej z różną definicją szerokości efektywnej. Skomentowano różnice w otrzymanych wynikach oraz przedstawiono wnioski przydatne do projektowania konstrukcji żelbetowych. Opisano procedurę wyznaczenia szerokości współpracującej półki przekroju teowego ze środnikiem w ujęciu norm PN-EN 1992-1-1:2008 oraz PN-B 03264:2002 wraz z komentarzem odnośnie wykorzystania szerokości efektywnej w obliczeniach i przy konstruowaniu zbrojenia w konstrukcjach żelbetowych. Przedstawiono w skrócie wyznaczenie zbrojenia z uwagi na zginanie metodą uproszczoną zgodnie z założeniami PN-EN 1992-1-1:2008. Dodatkowo analizie poddano normowy wzór na wyznaczenia minimalnego pola przekroju zbrojenia rozciąganego (9.1N) w PN-EN 1992-1-1:2008, z propozycją jego ścisłego wy-znaczenia dla przypadku przekroju teowego z półką w strefie rozciąganej.
    Źródło:
    Budownictwo i Architektura; 2021, 20, 2; 41-56
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial, functional and comparative analysis of a Late Palaeolithic Swiderian culture settlement at Kraków-Bieżanów site 15
    Przestrzenna, funkcjonalna i porównawcza analiza obozowiska kultury świderskiej z Krakowa Bieżanowa stanowisko 15
    Autorzy:
    Pyżewicz, Katarzyna
    Serwatka, Kamil
    Stefański, Damian
    Powiązania:
    https://bibliotekanauki.pl/articles/584876.pdf
    Data publikacji:
    2017
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    Paleolit schyłkowy
    kultura świderska
    analiza geometryczno-mrfometryczna kształtu
    analiza traseologiczna
    analiza przekroju poprzecznego
    Late Palaeolithic
    Swiderian culture
    Swiderian point
    use-wear analysis
    tip cross-sectional area analysis
    tip angle analysis
    geometric-morphometric outline shape analysis
    Opis:
    Niniejszy artykuł jest studium poświęconym organizacji przestrzennej osadnictwa kultury świderskiej na stanowisku w Krakowie-Bieżanowie 15. W trakcie szerokopłaszczyznowych badań ratowniczych (2004-2008), pozyskano tam liczne materiały krzemienne wiązane z tą kulturą. Pochodzą one zarówno z obiektów, jak np. niewielkiej krzemienicy (KB-15/1 – obiekt 1), czy skupiska materiału (obiekt 2 i 3), jak również ze znacznej części przebadanej partii stanowiska, gdzie zostały podjęte jako znaleziska pojedyncze. Analiza planigraficzna podstawowych grup narzędziowych, tj. liściaków (ostrzy) świderskich, drapaczy i rylców, pokazała, że ich rozrzut wokół obiektów archeologicznych nie jest przypadkowy i wskazuje on na zróżnicowanie w zakresie funkcjonalnej organizacji przestrzeni przez ludność kultury świderskiej na stanowisku. Niniejsze badanie miało odpowiedzieć na pytanie dotyczące właściwości tego zróżnicowania. W tym celu przebadano mikroskopowo część dostępnego materiału. Chociaż stan zachowania zabytków mocno ograniczył możliwość przeprowadzenie analizy traseologicznej, to poczyniono szereg cennych obserwacji. Szczególnie interesujące wnioski dotyczyły liściaków i drapaczy. Dodatkowo, liściaki świderskie, jako miarodajna kategoria zabytków związanych z kulturą świderską, zostały przeanalizowane przez zastosowanie metod morfometrycznych (analiza przekroju poprzecznego ostrza, analiza kąta ostrza, morfometria geometryczna kształtu liściaków), a płynące z nich wnioski uzupełniły badania traseologiczne. Uzyskane wyniki pozwoliły na wskazanie wyróżniających się obszarów (strefy liściaków, drapaczy i rylców) oraz ich interpretację funkcjonalną.
    This article is a study devoted to the spatial organization of a settlement of the Swiderian culture at Kraków-Bieżanów site 15. In the course of wide-scale rescue excavations (1999-2008), numerous lithic materials associated with this culture were discovered. They come from archaeological features such as the small kshemenitsa (KB-15/1 – feature 1) or spots of material clustering (features 2 and 3), they were collected as single finds. The spatialanalysis of the basic tool groups, i.e. Swiderian points, endscrapers and burins, showed that their distribution around archaeological objects wasnot accidental and points to diversity in functional space organization at the site. The aim of this investigation was to find the reason for the nature of this differentiation. For this purpose, a part of the available material has been studied by means of use-wear analysis. Although the state of preservation of lithics greatly reduced the possibility of carrying out functional analysis, a number of valuable observations were made. Particularly interesting were results concerning Swiderian points and endscrapers. In addition, Swiderian points, as the most intriguing category of typological tool related to the Swiderian culture, were analyzed by morphometric methods (tip cross-sectional area analysis, tip angle analysis, geometrics morphometrics) which were subjected to corroborated use-wear studies. The results obtained indicated the distictive areas (points, endscrapers and burins zones) and shed light on their functional interpretation.
    Źródło:
    Acta Archaeologica Lodziensia; 2017, 63; 7-27
    0065-0986
    2451-0300
    Pojawia się w:
    Acta Archaeologica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer Professionals and Carpal Tunnel Syndrome (CTS)
    Autorzy:
    Ali, K. M.
    Sathiyasekaran, B. W. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/90158.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    musculoskeletal disorders
    cross-sectional study
    occupational disorder
    Tinel’s sign
    Phalen’s sign
    wrist
    hand
    body mass index
    nadgarstek
    ręka
    praca a choroby
    komputer
    choroby narządów ruchu
    pozycja przy pracy
    choroba zawodowa
    syndrom cieśni nadgarstka
    Opis:
    Carpal Tunnel Syndrome (CTS) is an important problem among computer professionals. Hence the prevalence of CTS among computer professionals and risk factors were studied. 648 subjects were selected from 4,276 computer professionals from 21 companies with a simple random sampling method. CTS was diagnosed based on clinical features.The prevalence of CTS was found to be 13.1% (95% CI 10.5–15.7%). Subjects with over 8 years of computer work, over 12 hrs of work per day and system administrators were at a higher risk for CTS (OR 3.3, 4.9 and 2.5 respectively). Flexed or extended hand position had higher risk for CTS. Higher risk for CTS was found with higher exposure to computer work. Ergonomic considerations are important in facilitating proper positioning of hand while working with a computer. Further studies on CTS risk factors among computer professionals are essential for planning prevention.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 3; 319-325
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatio‑Temporal Analysis of the Impact of Credit Rating Agency Announcements on the Government Bond Yield in the World in the Period of 2008–2017
    Przestrzenno‑czasowa analiza wpływu ogłoszeń agencji ratingowych na rentowność obligacji skarbowych na świecie w latach 2008–2017
    Autorzy:
    Szulc, Elżbieta
    Wleklińska, Dagna
    Powiązania:
    https://bibliotekanauki.pl/articles/655017.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    obligacje skarbowe
    rating obligacji
    rentowność obligacji
    modele przestrzenne dla połączonych danych przekrojowo‑czasowych
    dynamiczne przestrzenne modele panelowe
    government bonds
    bond rating
    bond yield
    dynamic spatial models for pooled time series and cross‑sectional data
    dynamic spatial panel data models
    Opis:
    Artykuł dotyczy wpływu ogłoszeń publikowanych przez agencje ratingowe na rentowność obligacji skarbowych wybranych krajów świata. Oceny przyznawane dłużnym papierom wartościowym ze względu na standing finansowy emitenta stanowią ważną determinantę ich rentowności. Wśród czynników wpływających na stopę zwrotu danego instrumentu dłużnego, oprócz czynników idiosynkratycznych, czyli związanych z gospodarką emitenta, oraz globalnych, wymienia się także oceny ratingowe krajów powiązanych. Badania empiryczne przeprowadzone w tym zakresie dowodzą ponadto, że relacja ta ma charakter asymetryczny. Pozwala to przypuszczać, że korzystne informacje dotyczące poprawy ratingów obligacji skarbowych nie znajdują odzwierciedlenia w spadku ich rentowności. Celem artykułu jest analiza interakcji między rentownością dziesięcioletnich obligacji skarbowych emitowanych przez wybrane gospodarki. Przedmiotem szczególnego zainteresowania jest ocena wpływu pozytywnych i negatywnych zmian ratingów, dokonywanych przez międzynarodowe agencje, na rentowność obligacji emitowanych przez inne gospodarki niż kraj, do którego odnosi się ocena. Zakres analizy dotyczy dziesięcioletnich obligacji skarbowych emitowanych przez czterdzieści krajów w latach 2008-2017. W pracy wykorzystano przestrzenne modele dla połączonych danych przekrojowych i szeregów czasowych, w tym dynamiczne przestrzenne modele panelowe.
    The paper concerns the impact of announcements published by rating agencies on the government bond yield in selected countries of the world. Ratings assigned to debt securities on account of the issuer’s financial standing are an important determinant of their yield. Factors that affect the rate of return of a given traded debt, in addition to idiosyncratic factors, i.e. those related to the issuer’s economy, and global factors, also include the ratings of connected countries. Moreover, empirical studies carried out in this area prove that the relationship is asymmetrical. This allows us to suppose that favourable information concerning the improvement of government bond ratings is not reflected in the decrease in their yield. The aim of the paper is the analysis of interactions between the yields of 10‑year government bonds issued by selected economies. A subject that is of particular interest is the evaluation of the impact of positive and negative changes in credit rating assessments made by international agencies on the yield of bonds issued by other economies than the country concerned in the assessment. The spatial scope of the analysis concerns 10‑year government bonds issued by 40 countries in the period of 2008-2017. In the study, dynamic spatial models for pooled time series and cross‑sectional data and dynamic spatial panel data models were used.
    Źródło:
    Acta Universitatis Lodziensis. Folia Oeconomica; 2019, 3, 342; 133-150
    0208-6018
    2353-7663
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Oeconomica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sposoby określania miąższości kłód brzozy brodawkowatej (Betula pendula Roth)
    Methods for determining the volume of silver birch (Betula pendula Roth) logs
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Witkowska, J.
    Jodłowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/986659.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    brzoza brodawkowata
    Betula pendula
    klody odziomkowe
    klody srodkowe
    miazszosc klod
    metody obliczen
    log volume
    two−sectional equations
    middle cross section equations
    empirical equations
    Opis:
    The purpose of the research was to develop and evaluate the accuracy of various methods for determining the volume of the butt−end (from 0 to 6 m) and middle (from 6 to 12 m) logs of silver birch. The material was collected on 84 samples plots established throughout Poland. On each plot, 2 to 10 trees (722 in total) were felled and measured using a cross−section method. The average age of the measured trees ranged from 22 to 97 years, the average diameter at the breast height from 7.0 to 39.6 cm, and the average height from 8.1 to 31.2 m. We tested 4 methods for log volume determination. Two can be used for individual logs and two for stacks. In method 1 one measures the log length and diameter under bark at a distance of 1 meter from the butt−end and at half the length of the remaining part of the log. The log volume is defined by a two−sectional formula based on the middle cross−section (eq. 1). The average error for that method is close to zero, regardless the log length (tab.). In method 2, two−sectional formula of the middle cross−section was used with the diameter in the middle of each section calculated from the developed regression models based on the log length and diameter under bark at the top end. For both logs the error of volume calculation is small, especially for the middle one (tab.). Method 3 defines the log volume using the middle cross−section formula, which requires log length and diameter at half of the length. For the butt−end log, the volume has a systematic negative error, exceeding –5%. For the middle log, the formula is characterized by high accuracy. Method 4 is also based on the middle cross−section formula, but the diameter up to half the length is calculated from empirical formulas based on the log length and diameter under bark at the top end (eq. 5c and 6c). The accuracy of this method is close to the accuracy of method 3 (tab.). To determine the log volume in inaccessible places, method 2 can be recommended. The corresponding diameter is calculated from the regression equations. This method can also be used when the measurement places are accessible, which unifies the birch log measurement methods. However, determination of birch logs volume based on the commonly used middle cross−section formula should not be applied as for the butt−end log this method produces too large negative error, additionally increased by the rounding down the diameter measurement.
    Źródło:
    Sylwan; 2018, 162, 06; 443-451
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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