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    Wyświetlanie 1-7 z 7
    Tytuł:
    George P. H. Styan - a celebration
    Autorzy:
    Coelho, Carlos
    Powiązania:
    https://bibliotekanauki.pl/articles/729852.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    Cochran's theorem
    distribution
    linear algebra
    quadratic forms
    Schur complements
    Opis:
    The first time I met George Styan was in July 2004 in Lisbon when he was on his way to the 11th ILAS Conference in Coimbra.
    But George had already been in Portugal before and I learned how much he was fond of Conventual, a very fine and nice old style restaurant in Lisbon. Then I also learned that George really is an appreciator of good food and a very well-educated wine drinker. With this detail in common it was really easy to become a good friend with George.
    Since then we met a number of times, the most significant of which was at the time of the 17th IWMS held in Tomar, Portugal, in 2008.
    Before this event, during a short stay of George and Evelyn in Lisbon, we had the opportunity to go to some nice spots like Sintra and to hang around a few nice places near Lisbon and even to attend a Leonard Cohen concert, together with some friends.
    Actually, even more than good food and a good wine, and more than a good mathematical challenge, George enjoys the company of his family and his friends. We may even say that more than Mathematics, it is his family and his friends that play and have always played a central role in his life. Everybody knows well how much he cares about Evelyn, the great woman behind the great man, and also everybody knows the looks in George's face when he meets the ones he cares about.
    Inevitably, besides addressing some of George's honors and also his scientific work and his interest in mathematics related stamps, it is based on a number of pictures, either taken by the author or by other friends and a couple of them even taken by George himself, that this little contribution to the celebration of George Styan's 75th birthday will be indeed more a celebration of the way George enjoys and nurtures the company of the ones he loves.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2013, 33, 1-2; 7-40
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biography of Professor João Tiago Praça Nunes Mexia
    Autorzy:
    Coelho, Carlos
    Pestana, Dinis
    Powiązania:
    https://bibliotekanauki.pl/articles/729656.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2009, 29, 2; 95-113
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preface
    Autorzy:
    Coelho, Carlos
    Puntanen, Simo
    Powiązania:
    https://bibliotekanauki.pl/articles/729782.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2013, 33, 1-2; 5-6
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Near-exact distributions for the generalized Wilks Lambda statistic
    Autorzy:
    Grilo, Luís
    Coelho, Carlos
    Powiązania:
    https://bibliotekanauki.pl/articles/729992.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    independent Beta random variables
    characteristic function
    sum of Gamma random variables
    likelihood ratio test statistic
    proximity measures
    Opis:
    Two near-exact distributions for the generalized Wilks Lambda statistic, used to test the independence of several sets of variables with a multivariate normal distribution, are developed for the case where two or more of these sets have an odd number of variables. Using the concept of near-exact distribution and based on a factorization of the exact characteristic function we obtain two approximations, which are very close to the exact distribution but far more manageable. These near-exact distributions equate, by construction, some of the first exact moments and correspond to cumulative distribution functions which are practical to use, allowing for an easy computation of quantiles. We also develop three asymptotic distributions which also equate some of the first exact moments. We assess the proximity of the asymptotic and near-exact distributions obtained to the exact distribution using two measures based on the Berry-Esseen bounds. In our comparative numerical study we consider different numbers of sets of variables, different numbers of variables per set and different sample sizes.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2010, 30, 1; 53-86
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    INSIGHT IN SPECIFIC PHOBIAS: A FORGOTTEN BIAS
    Autorzy:
    Coelho, Carlos Magalhães
    Pisitsungkagarn, Kullaya
    Taephant, Nattasuda
    Barbosa, Fernando
    Powiązania:
    https://bibliotekanauki.pl/articles/2137786.pdf
    Data publikacji:
    2018-01-03
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    anosognosia
    delusion
    DSM
    Opis:
    The term insight is a major concept in psychiatry, which nonetheless has a number of different connotations ranging from awareness of one’s disorder to achieving a clear and sudden solution of a problem or anosognosia. Although this concept is ubiquitous in the psychological literature, its definition is not clear, including in DSM-5; the most commonly used diagnostic system for mental disorders. This turns its use ambiguous, particularly for those who are not familiar with the historical background of the word. Here, we aim to a better understanding of insight in specific phobias and discuss the possible causes and implications in DSM-5 criterion changes. The historical analysis of this concept lead to conclude three main assumptions: 1) There are probably different etiopathogenic mechanisms subjacent to the deve lop ment of insight, anosognosia and possibly other “insight” related terms; 2) in the case of specific phobias, lack of insight is better seen and explained as a cognitive bias; 3) DSM use of an insight specifier for specific phobias could be of use; 4) lack of insight can be seen simply as a cognitive bias in most phobia cases.
    Źródło:
    Acta Neuropsychologica; 2017, 15(4); 467-476
    1730-7503
    2084-4298
    Pojawia się w:
    Acta Neuropsychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparing dizziness and vertigo inventory responses in Thai and Thai-Chinese people
    Autorzy:
    Coelho, Carlos M
    Pisitsungkagarn, Kullaya
    Taephant, Nattasuda
    Balaban, Carey D
    Powiązania:
    https://bibliotekanauki.pl/articles/2106204.pdf
    Data publikacji:
    2019-04-30
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    Motion sickness
    Fear of heights
    Vertigo syndromes
    Asian populations
    Opis:
    It is acknowledged that ancestry may play a role in the likelihood of reporting motion sickness, based upon questionnaires in which symptoms are reported more frequently in individuals with Asian ancestry. This study compares motion sickness and related vertigo syndromes in Thai and Thai-Chinese populations. The Motion Sickness Questionnaire; Albany Panic and Phobia Questionnaire; Acrophobia Questionnaire; Body Symptoms Questionnaire and the Situational Characteristics Questionnaire were administered to 128 participants. Eighty-eight participants had a father, mother and all grandparents of Thai origin, while 44 participants had with at least one Chinese ancestor among parents or grandparents. All responses were similar between groups except regarding fear of heights, which is significantly higher in Thai participants without recent Chinese ancestors. Reported motion sickness sensitivity is similar between Thai and Chinese populations. The group differences for some fear of heights items may be linked to each group’ previous experience with heights. Results also suggest that although conquering a fear of heights might require specific visuo-vestibular adaptations, these adaptations alone may not be sufficient to lessen an individual’sfear of heights.
    Źródło:
    Acta Neuropsychologica; 2019, 17(1); 55-67
    1730-7503
    2084-4298
    Pojawia się w:
    Acta Neuropsychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Portuguese version of the Swedish Occupational Fatigue Inventory (SOFI) among assembly workers: Cultural adaptation, reliability and validity
    Autorzy:
    Santos, Joana
    Carvalhais, Carlos
    Ramos, Catarina
    Coelho, Tiago
    Monteiro, Pedro R.
    Vaz, Mário A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2161877.pdf
    Data publikacji:
    2017-05-08
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    reliability
    confirmatory factor analysis
    validity
    cultural adaptation
    perceived fatigue
    Swedish Occupational Fatigue Inventory
    Opis:
    Objectives Reliable and valid instruments are essential for understanding fatigue in occupational settings. This study analyzed the psychometric properties of the Portuguese version of the Swedish Occupational Fatigue Inventory (SOFI). Material and Methods A cross-sectional study was conducted with 218 workers from an automotive industry involved in assembly tasks for fabrication of mechanical cables. Convergent and discriminant validity, internal consistency reliability and confirmatory factor analysis were performed. Results Results showed adequate fit to data, yielding a 20-item, 5-factor structure (all intercorrelated): Chi²/df (ratio Chi² and degrees of freedom) = 2.530, confirmatory fit index (CFI) = 0.919, goodness of fit index (GFI) = 0.845, root mean square error of approximation (RMSEA) = 0.084. The SOFI presented an adequate internal consistency, with the sub-scales and total scale presenting good reliability values (Cronbach’s α values from 0.742 to 0.903 and 0.943 respectively). Conclusions Findings suggest that the Portuguese version of the SOFI may be a useful tool to assess fatigue and prevent work-related injuries. In future research, other instruments should be used as an external criterion to correlate with the SOFI dimensions. Int J Occup Med Environ Health 2017;30(3):407–417
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2017, 30, 3; 407-417
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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