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    Wyświetlanie 1-33 z 33
    Tytuł:
    Risk Attitudes, Buying and Selling Price for a Lottery and Simple Strategies
    Autorzy:
    Lewandowski, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/483243.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wealth-invariance
    scale-invariance
    CARA
    CRRA
    DARA
    risk aversion
    buying and selling price for a lottery
    Opis:
    This paper defines the concept of simple strategy and introduces three kinds of simple strategies: wealth-invariant, scale-invariant and "wealthier-accept more". For three commonly used utility function families: CARA, CRRA and DARA equivalent characterizations are obtained in terms of the corresponding simple strategy, in terms of the buying and selling price properties, and in terms of the utility function properties as expressed by Cauchy functional equations. Moreover, an extension of famous Pratt (1964) theorem is proved which involves buying price for a lottery as an alternative measure of comparative risk aversion. Additionally a number of propositions on both selling and buying price for a lottery and CRRA utility class are proved.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2013, 5, 1; 1-34
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A viability result for nonconvex semilinear functional differential inclusions
    Autorzy:
    Lupulescu, Vasile
    Necula, Mihai
    Powiązania:
    https://bibliotekanauki.pl/articles/729593.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    viability
    invariance
    tangency condition
    semilinear differential inclusions
    Opis:
    We establish some sufficient conditions in order that a given locally closed subset of a separable Banach space be a viable domain for a semilinear functional differential inclusion, using a tangency condition involving a semigroup generated by a linear operator.
    Źródło:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2005, 25, 1; 109-128
    1509-9407
    Pojawia się w:
    Discussiones Mathematicae, Differential Inclusions, Control and Optimization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ontyczny status wyrażeń według de Saussure’a na tle ujęć chińskich i indyjskich teoretyków języka
    Ontic Status of Expressions According to de Saussure in Comparison to the Old Chinese and Indian Conceptions
    Autorzy:
    Drzazgowska, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/568036.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Mikołaja Kopernika w Toruniu. Wydawnictwo UMK
    Tematy:
    language
    expression
    proportion
    invariance
    non-materiality
    opposition
    Opis:
    The aim of the paper is to point out certain analogies between de Saussure’s theoretical reflection on the ontic properties of expressions and the corresponding old Chinese and Indian concepts. Following a review of de Saussure’s ideas, the author proceeds to present their Eastern analogues. The main focus is turned to the fact that the Chinese Moists as well as the Indian grammarians and philosophers elicited proportion as the key to the understanding of the mechanism of language. The Sanscrit grammarians, the philosophers of Mīmāṃsa as well as, most probably, Gongsun Long in China saw clearly the invariant and non-material nature of expressions. The Buddhist logicians and the Moists also pointed to the oppositional character of expressions as constitutive for language.
    Źródło:
    Linguistica Copernicana; 2013, 2(10); 51-63
    2080-1068
    2391-7768
    Pojawia się w:
    Linguistica Copernicana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperbolically convex functions
    Autorzy:
    Ma, Wancang
    Minda, David
    Powiązania:
    https://bibliotekanauki.pl/articles/1311659.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    hyperbolic convexity
    distortion theorem
    growth thoerem
    linear invariance
    Opis:
    We investigate univalent holomorphic functions f defined on the unit disk such that f() is a hyperbolically convex subset of ; there are a number of analogies with the classical theory of (euclidean) convex univalent functions. A subregion Ω of is called hyperbolically convex (relative to hyperbolic geometry on ) if for all points a,b in Ω the arc of the hyperbolic geodesic in connecting a and b (the arc of the circle joining a and b which is orthogonal to the unit circle) lies in Ω. We give several analytic characterizations of hyperbolically convex functions. These analytic results lead to a number of sharp consequences, including covering, growth and distortion theorems and the precise upper bound on |f''(0)| for normalized (f(0) = 0 and f'(0) > 0) hyperbolically convex functions. In addition, we find the radius of hyperbolic convexity for normalized univalent functions mapping into itself. Finally, we suggest an alternate definition of "hyperbolic linear invariance" for locally univalent functions f: → that parallels earlier definitions of euclidean and spherical linear invariance.
    Źródło:
    Annales Polonici Mathematici; 1994-1995, 60, 1; 81-100
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Invariant properties of positive linear electrical circuits
    Autorzy:
    Kaczorek, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/377307.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    invariance
    positive
    linear
    system
    stability
    reachability
    transfer matrix
    Opis:
    The invariant properties of the stability, reachability, and transfer matrices of positive linear electrical circuits with integer and fractional orders are investigated. It is shown that the stability, reachability and transfer matrix of positive linear systems are invariant under their integer and fractional orders.
    Źródło:
    Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 97; 109-123
    1897-0737
    Pojawia się w:
    Poznan University of Technology Academic Journals. Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Invariant properties of positive linear electrical circuits
    Autorzy:
    Kaczorek, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/141246.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    invariance
    positive linear system
    reachability
    stability
    transfer matrix
    Opis:
    The invariant properties of the stability, reachability, observability and transfer matrices of positive linear electrical circuits with integer and fractional orders are investigated. It is shown that the stability, reachability, observability and transfer matrix of positive linear systems are invariant under their integer and fractional orders.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 4; 875-890
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Invariance of reachability and observability for fractional positive linear electrical circuit with delays
    Autorzy:
    Yuan, Tong
    Yang, Hongli
    Powiązania:
    https://bibliotekanauki.pl/articles/1841230.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    invariance
    observability
    positive linear electrical circuits with delays
    reachability
    Opis:
    This paper focuses on the invariance of the reachability and observability for fractional order positive linear electrical circuits with delays and their checking methods. By derivation and comparison, it shows that conditions and checking methods of reachability and observability for integer and fractional order positive linear electrical circuits with delays are invariant. An illustrative example is presented at the end of the paper.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 3; 513-530
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utility functions invariant with respect to some classes of transformations
    Autorzy:
    Chudziak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/206749.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    utility function
    invariance
    functional equation
    additive function
    exponential function
    Opis:
    Inspired by some relevant recent results of A. E. Abbas we determine utility functions invariant with respect to some classes of transformations.
    Źródło:
    Control and Cybernetics; 2013, 42, 2; 347-363
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Periodic solutions in multivariate invariance arguments
    Autorzy:
    Chudziak, J.
    Wójcik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/254733.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    multivariate utility function
    invariance
    periodic solution
    additive function
    exponential function
    Opis:
    Inspired by the recent results of A.E. Abbas we determine continuous multivariate utility functions invariant with respect to a wide family of transformations related to the shift transformations.
    Źródło:
    Opuscula Mathematica; 2013, 33, 3; 455-465
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Psychometric Properties of the Polish Version of the Short Grit Scale
    Autorzy:
    Wyszyńska, Patrycja
    Ponikiewska, Klaudia
    Karaś, Dominika
    Najderska, Małgorzata
    Rogoza, Radosław
    Powiązania:
    https://bibliotekanauki.pl/articles/2128467.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    grit
    consistency of interest
    perseverance of effort
    success
    measurement invariance
    Opis:
    This study aimed to verify the psychometric properties of the Polish version of the Grit-S questionnaire. Grit is understood here as the perseverance and passion for long-term goals, and it encompasses two dimensions: Consistency of Interest and Perseverance of Effort. The sample comprised N = 270 participants aged 18–34 (Mage = 20.79). We performed confirmatory factor analyses to verify the dimensional structure of grit, multi-group confirmatory factor analysis to compare the structure across gender, and correlation analysis to examine external validity (exploring the correlations between grit, procrastination, and well-being). Findings showed satisfactory parameters for Grit-S including: reliability, structural and external validity, and measurement invariance across gender groups. The results support the possibility of using the Grit-S questionnaire in research exploring the predictors of success.
    Źródło:
    Polish Psychological Bulletin; 2017, 2; 229-236
    0079-2993
    Pojawia się w:
    Polish Psychological Bulletin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conformal Invariance and Conserved Quantities for Lagrange Equation of Thin Elastic Rod
    Autorzy:
    Wang, Peng
    Feng, Hui-Rong
    Lou, Zhi-Mei
    Powiązania:
    https://bibliotekanauki.pl/articles/1033429.pdf
    Data publikacji:
    2017-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    conformal invariance
    Lie symmetry
    conserved quantities
    thin elastic rod
    Lagrange equation
    Opis:
    Basing on the analytical mechanics methods, the Lagrangian equations of thin elastic rod is constructed. The definition of conformal invariance for the Lagrange mechanics of elastic rod is given. The criterions that conformal invariance of elastic rod is the Lie symmetry are obtained based on the Lie point transformation group. The structure equation and conserved quantity deduced from conformal invariance of elastic rod are constructed. Take twist rod as an example to illustrate the application of the results got in this paper.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 2; 283-287
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    F-tests for generalized linear hypotheses in subnormal models
    Autorzy:
    Mexia, Joao
    Dias, Gerberto
    Powiązania:
    https://bibliotekanauki.pl/articles/729870.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    F-tests
    subnormal models
    mixed models
    invariance
    UMP tests
    third type error
    Opis:
    When the measurement errors may be assumed to be normal and independent from what is measured a subnormal model may be used. We define a linear and generalized linear hypotheses for these models, and derive F-tests for them. These tests are shown to be UMP for linear hypotheses as well as strictly unbiased and strongly consistent for these hypotheses. It is also shown that the F-tests are invariant for regular transformations, possess structural stability and are almost strongly consistent for generalized linear hypothesis. An application to a mixed model studied by Michalskyi and Zmyślony is shown.
    Źródło:
    Discussiones Mathematicae Probability and Statistics; 2001, 21, 1; 49-62
    1509-9423
    Pojawia się w:
    Discussiones Mathematicae Probability and Statistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is Time Inhomogeneous ?
    Autorzy:
    Sadatian, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/412482.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    quantum gravity
    Lorentz Invariance
    symmetry breaking
    varying speed of light
    fractal mathematics
    Opis:
    In this article, we discuss probability of inhomogeneous time in high or low energy scale of physics. Consequently, the possibility was investigated of using theories such as varying speed of light (VSL) and fractal mathematics to build a framework within which answers can be found to some of standard cosmological problems and physics theories on the basis of time non-homogeneity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 155-159
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Consumer confidence, durable goods purchase and unemployment forecast
    Autorzy:
    Białowolski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/424992.pdf
    Data publikacji:
    2014
    Wydawca:
    Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
    Tematy:
    consumer confidence
    confirmatory factor analysis
    durable goods purchase
    measurement invariance
    unemployment expectations
    Opis:
    Multi-Group Confirmatory Factor Analysis (MGCFA) demonstrated the deficiency of the four original European Commission (EC) items for consumer confidence. Fit of the MGCFA model was unacceptable and without scalar invariance, index comparison between study periods was not permissible. This provided clear motivation for a plausible alternative index specification to comply with requirements for single-dimensionality and meaning invariance throughout the study period. The MGCFA model using a new set of items demonstrated partial metric and partial scalar invariance. Using the structural equation framework, consumer confidence was revealed as strongly interrelated with unemployment forecast and durable goods purchase.
    Źródło:
    Econometrics. Ekonometria. Advances in Applied Data Analytics; 2014, 3(45); 42-55
    1507-3866
    Pojawia się w:
    Econometrics. Ekonometria. Advances in Applied Data Analytics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Appearance Schemas Inventory–Revised: Validation on a Polish Sample
    Autorzy:
    Poraj-Weder, Magdalena
    Szulawski, Michał
    Rogoza, Radosław
    Jasielska, Dorota
    Pios, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/31343478.pdf
    Data publikacji:
    2024
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    Appearance Schemas Inventory–Revised
    appearance investment
    body image
    Polish adaptation
    invariance analysis
    Opis:
    The aim of this study (N = 713) was to adapt the Appearance Schemas Inventory–Revised into Polish and evaluate its psychometric properties. The ASI-R is a widely used tool for measuring appearance schemas, but it is currently not available in Polish. The adaptation of the ASI-R has the potential to fill this gap and encourage research in the Polish community. The validation of the scale was conducted on two separate samples of healthy adults. Although the results indicate that the Polish version of the scale, in contrast to the original one, exhibits a one-factor structure, its psychometric properties are robust. The scale demonstrates high internal consistency and sound construct validity, established through correlations with various aspects of psychosocial functioning, along with body image and sociocultural attitudes toward appearance. The scale seems to be gender-invariant and can be utilized in future studies that adopt a cognitive-behavioral approach to appearance schemas.
    Źródło:
    Roczniki Psychologiczne; 2024, 27, 1; 27-48
    1507-7888
    Pojawia się w:
    Roczniki Psychologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urdu Translation and the Validation of a 14-Item Measure to Assess Stress Management Skills in Healthcare Workers: Measurement Invariance Across Gender
    Autorzy:
    Ali, Yumna
    Farhana Kazmi, Syeda
    Powiązania:
    https://bibliotekanauki.pl/articles/29433358.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Stress management skills
    coping
    lifestyle healthcare workers
    gender
    invariance
    Urdu
    translation and validation
    Opis:
    This study aims to conduct an Urdu translation and a validation of the ISBF Stress Management Skills Scale in two distinct phases. The first phase includes the forward-back translation method for ISBF. The second phase includes cross validation and the establishment of psychometric properties for the ISBF scale. A sample of 500 adults working in health care was taken from different hospitals and dispensaries. The first phase of the study includes the forward-back translation method. The second phase includes exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) with invariance measurement. The total reliability of the scale is reported to be .812. EFA revealed a two-factor structure for ISBF scale, with configural, metric and scalar invariance across males and females, and comparable latent mean scores for males and females. CFA showed goodness-of fit indices for the two factors. The scale showed good internal consistency values. The model fit value includes the value for the goodness of fit index, which was .979, for the adjusted goodness-of fit index: .961, for the comparative fit index: .993, for the incremental fit index: .993, and for the root mean square error of approximation (RMSEA) value: .033. Good values of composite reliability and convergent validity were measured for both dimensions of the scale. The scale shows that this diagnostic tool can help to assess the skills used to manage stress. For criterion validity, the coping Inventory for Stressful Situations (CISS-21) was used, which showed positive correlations. The subscale of stress management was taken from the Health Promoting Life Style Profile II (HPLP-II), which also showed positive correlations. Significant mean differences were found between scores of healthcare workers with stress management skills and with those without stress management skills. The group of mean differences indicated the females have greater stress management skills as compared to men. The Urdu translated and validated instrument will be helpful in understanding behavior in healthcare settings.
    Źródło:
    Ethics in Progress; 2023, 14, 1; 110-125
    2084-9257
    Pojawia się w:
    Ethics in Progress
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On uniqueness of G-measures and g-measures
    Autorzy:
    Hua Fan, Ai
    Powiązania:
    https://bibliotekanauki.pl/articles/1287544.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    G-measures
    g-measures
    ergodic measures
    Riesz products
    quasi-invariance
    dimension of measures
    Opis:
    We give a simple proof of the sufficiency of a log-lipschitzian condition for the uniqueness of G-measures and g-measures which were studied by G. Brown, A. H. Dooley and M. Keane. In the opposite direction, we show that the lipschitzian condition together with positivity is not sufficient. In the special case where the defining function depends only upon two coordinates, we find a necessary and sufficient condition. The special case of Riesz products is discussed and the Hausdorff dimension of Riesz products is calculated.
    Źródło:
    Studia Mathematica; 1996, 119, 3; 255-269
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Survey-based household inflation expectations. Are they valid? A multi-group confirmatory factor analysis approach
    Autorzy:
    Białowolski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/500699.pdf
    Data publikacji:
    2015
    Wydawca:
    Szkoła Główna Handlowa w Warszawie
    Tematy:
    confirmatory factor analysis
    consumer confidence indicator
    consumer tendency surveys
    inflation expectations
    measurement invariance
    Opis:
    We present evidence that micro-level household inflation expectations are influenced by consumer confidence. To account for this impact, using multi-group confirmatory factor analysis, we measure the intertemporal consistency of a model comprising both consumer confidence and inflation expectations. We determine that the model exhibits the property of partial measurement invariance. Thus, we are able to account reliably for the influence of consumer confidence on inflation expectations and, simultaneously, to obtain corrected inflation expectations at the household level. It appears that, after correcting for the level of confidence, average inflation expectations at each point in time become significantly more similar to the average inflation expectations of professional forecasters and more correlated with average consumer confidence. Our analysis is based on household survey data from Poland’s State of the Households’ Survey (from 2000Q1 to 2012Q1), which is conducted in line with the European Commission’s methodology.
    Źródło:
    Prace i Materiały Instytutu Rozwoju Gospodarczego SGH; 2015, 96: Analyzing and forecasting economic fluctuations; 49-67
    0866-9503
    Pojawia się w:
    Prace i Materiały Instytutu Rozwoju Gospodarczego SGH
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Could k-NN classifier be Useful in tree leaves recognition?
    Autorzy:
    Horaisová, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/229900.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    binary image
    Fourier transform
    affine invariance
    harmonic analysis
    pattern recognition
    k-NN classifier
    Opis:
    This paper presents a method for affine invariant recognition of two-dimensional binary objects based on 2D Fourier power spectrum. Such function is translation invariant and their moments of second order enable construction of affine invariant spectrum except of the rotation effect. Harmonic analysis of samples on circular paths generates Fourier coefficients whose absolute values are affine invariant descriptors. Affine invariancy is approximately saved also for large digital binary images as demonstrated in the experimental part. The proposed method is tested on artificial data set first and consequently on a large set of 2D binary digital images of tree leaves. High dimensionality of feature vectors is reduced via the kernel PCA technique with Gaussian kernel and the k-NN classifier is used for image classification. The results are summarized as k-NN classifier sensitivity after dimensionality reduction. The resulting descriptors after dimensionality reduction are able to distinguish real contours of tree leaves with acceptable classification error. The general methodology is directly applicable to any set of large binary images. All calculations were performed in the MATLAB environment.
    Źródło:
    Archives of Control Sciences; 2014, 24, 2; 177-192
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-Certainty-Equivalent Adaptive Control of a Nonlinear Aeroelastic System
    Autorzy:
    Lee, K. W.
    Singh, S. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/226734.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aeroelastic wing
    adaptive flutter control
    nonlinear system
    immersion and invariance method
    uncertain system
    Opis:
    The development of a non-certainty-equivalent adaptive control system for the control of a nonlinear aeroelastic system is the subject of this paper. The prototypical aeroelastic wing section considered here includes structural nonlinearity and a single control surface for the purpose of control. Its dynamical model has two-degree-of-freedom and describes the plunge and pitch motion. It is assumed that the model parameters (except the sign of one of the control input coefficients) are not known. The uncontrolled aeroelastic model exhibits limit cycle oscillation beyond a critical free-stream velocity. Based on the attractive manifold, and the immersion and invariance methodologies, a non-certainty-equivalent adaptive state variable feedback control law for the trajectory tracking of the pitch angle is derived. Using the Lyapunov analysis, asymptotic convergence of the state variables to the origin is established. It is shown that the trajectory of the system converges to a manifold. The special feature of the designed control system is that the closed-loop system asymptotically recovers the performance of a deterministic controller. This cannot happen if certainty-equivalent adaptive controllers are used. Simulation results are presented which show that the control system suppresses the oscillatory responses of the system in the presence of large parameter uncertainties.
    Źródło:
    International Journal of Electronics and Telecommunications; 2010, 56, 4; 463-471
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variable structure observer design for a class of uncertain systems with a time-varying delay
    Autorzy:
    Liu W., J.
    Powiązania:
    https://bibliotekanauki.pl/articles/330119.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    obserwator
    niezmienniczość
    uogólniona odwrotność macierzy
    variable structure observer
    invariance property
    generalized matrix inverse approach
    Opis:
    Design of a state observer is an important issue in control systems and signal processing. It is well known that it is difficult to obtain the desired properties of state feedback control if some or all of the system states cannot be directly measured. Moreover, the existence of a lumped perturbation and/or a time delay usually reduces the system performance or even produces an instability in the closed-loop system. Therefore, in this paper, a new Variable Structure Observer (VSO) is proposed for a class of uncertain systems subjected to a time varying delay and a lumped perturbation. Based on the strictly positive real concept, the stability of the equivalent error system is verified. Based on the generalized matrix inverse approach, the global reaching condition of the sliding mode of the error system is guaranteed. Also, the proposed variable structure observer will be shown to possess the invariance property in relation to the lumped perturbation, as the traditional variable structure controller does. Furthermore, two illustrative examples with a series of computer simulation studies are given to demonstrate the effectiveness of the proposed design method.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 575-583
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    General Self-Efficacy Associations with Personality and Motivation: Psychometric Properties and Measurement Invariance of the Polish New General Self-Efficacy Scale
    Autorzy:
    Baran, Lidia
    Janowski, Maciej
    Powiązania:
    https://bibliotekanauki.pl/articles/29433611.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
    Tematy:
    ougólnione poczucie własnej skuteczności
    osobowość
    motywacja
    niezmienność pomiarowa
    general self-efficacy
    personality
    motivation
    measurement invariance
    Opis:
    This study aimed to determine the validity and reliability of the Polish version of the New General Self-Efficacy Scale (NGSE). In four different samples (N = 1,837), adult respondents completed the Polish version of NGSE (NGSEpl) in combination with questionnaires assessing personality, motivation, and behavioral tendencies. Confirmatory factor analysis demonstrated a good fit for the one-factor structure. Cronbach's alpha was above .87 in all samples, and the stability of the scale was .68. Measurement invariance of NGSEpl calculated for different age groups confirmed that the scale measures the same construct in both samples. NGSEpl scores were positively related to the frequency of active coping strategies, mastery-goal orientation, and Big Five model traits and negatively to passive coping strategies. Results supported the reliability, stability, and validity of the NGSEpl.
    Celem niniejszego badania było określenie trafności i rzetelności polskiej wersji Nowej Skali Uogólnionego Poczucia Własnej Skuteczności (NGSE). W czterech różnych próbach (N = 1,837) dorośli respondenci wypełnili polską wersję NGSE (NGSEpl) w połączeniu z kwestionariuszami mierzącymi osobowość, motywację i tendencje behawioralne. Konfirmacyjna analiza czynnikowa wykazała dobre dopasowanie struktury jednoczynnikowej do danych. Współczynnik alfa Cronbacha wyniósł powyżej .87 we wszystkich próbach, a stabilność skali wyniosła .68. Niezmienność pomiarowa NGSEpl obliczona dla różnych grup wiekowych potwierdziła, że skala mierzy ten sam konstrukt w obu próbach. Wyniki NGSEpl były dodatnio powiązane z częstością korzystania z aktywnych strategii radzenia sobie, motywacją mistrzostwa, wszystkimi cechami modelu Wielkiej Piątki, a ujemnie z pasywnymi strategiami radzenia sobie. Wyniki uzyskanych analiz potwierdziły zatem rzetelność, stabilność i trafność NGSEpl.
    Źródło:
    Studia Psychologica; 2023, 23, 1; 15-29
    1642-2473
    Pojawia się w:
    Studia Psychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perfectionism and Marital Satisfaction among Graduate Students: A Multigroup Invariance Analysis by Counseling Help-seeking Attitudes
    Autorzy:
    Foo, Fatt Mee
    Hassan, Siti Aishah
    Talib, Mansor Abu
    Zakaria, Noor Syamilah
    Powiązania:
    https://bibliotekanauki.pl/articles/2128459.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    perfectionism
    marital satisfaction
    counseling help-seeking attitudes
    graduate students
    latent mean analysis
    multigroup invariance analysis
    Opis:
    This study aims to measure the latent mean difference in perfectionism and marital satisfaction by counseling help-seeking attitudes. The respondents were 327 married graduate students from a research university in Malaysia. An online self-administered questionnaire was used to collect the data. The respondents completed the Almost Perfect Scale-Revised, Dyadic Almost Perfect Scale, Marital Satisfaction Scale, and Attitudes toward Seeking Professional Psychology Help Scale. Confirmatory factor analysis was used to examined the instruments and the results indicated that construct validity were achieved. The latent mean difference in perfectionism and marital satisfaction by counseling help-seeking attitudes were tested using multigroup invariance analysis. The respondents with negative attitudes toward counseling help-seeking (n = 159) reported a higher latent mean in perfectionism but a lower latent mean in marital satisfaction compared to those with positive attitudes toward counseling help-seeking (n = 168). The implications of these findings for counseling services are discussed.
    Źródło:
    Polish Psychological Bulletin; 2017, 2; 301-306
    0079-2993
    Pojawia się w:
    Polish Psychological Bulletin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wyprowadzanie ogólnych dynamicznych równań bonitacyjnych za pomocą uniwersalnej metody rożnic algebraicznych
    Derivation of Generic Dynamic Site Equations Using Generalized Algebraic Difference Approach
    Autorzy:
    Cieszewski, C.J.
    Zasada, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026347.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    metoda roznic algebraicznych
    bonitacja siedliska
    lesnictwo
    site index model
    site productivity
    base−age invariance
    dynamic equations
    Opis:
    This article describes use of the Generalized Algebraic Difference Approach for derivation of generic dynamic site equations. The generic equations are useful in situations of unspecific expectations with regards to the final model form where one wants to test simultaneously in a single fitting many various models and assumptions about the modeled processes. Equations derived in this work are extremely flexible with various patterns of polymorphisms and asymptotes. Even thought in principle the generic equations have more parameters, those derived with methodology proposed here are very parsimonious.
    Źródło:
    Sylwan; 2003, 147, 03; 40-46
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validation of Theoretical and Measurement Model of the Generalized Problematic Internet Use Scale 2 in a Polish Sample
    Autorzy:
    Ciżkowicz, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/2125135.pdf
    Data publikacji:
    2022-04-26
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    Generalized Problematic Internet Use (GPIU)
    the cognitive-behavioral model of GPIU
    Caplan GPIUS2
    measurement invariance
    Opis:
    The Generalized Problematic Internet Use Scale (GPIUS2) was developed to operationalize the theoretical cognitive-behavioral model of GPIU.  The aims of the study were to examine the theoretical model of GPIU, analyze the psychometric properties of the GPIUS2 among Polish adolescents, study measurement invariance across gender and method of data collection (offline vs. online). The sample comprised of 1,621 participants (52% men, Mage = 20.3). Some participants completed an online version of the GPIUS2 (n = 707, 73% men, M = 17.9), and others filled in a pencil and paper version (n = 914, 35% men, M = 22.1). Reliability was assessed (Cronbach’s α; McDonald’s ω). The factor structure and nomological, convergent, and discriminant validity were tested. The findings of this study supported the reliability and the factor structure of the GPIUS2. The factor similarity in Polish sample and the original US sample was high (Tucker’s congruence coefficients were range: .99–1.00). The structural relationships between the constructs of the model, convergent and discriminant validity were confirmed. The strong measurement invariance of the model across gender and method of data collection was confirmed. The Polish version of the GPIUS2 is a reliable and valid instrument that can be used for Polish adolescent samples. The scale showed measurement invariance across gender and method of data collection. Furthermore, the results support the cognitive-behavioral model of problematic Internet use in adolescents.
    Źródło:
    Roczniki Psychologiczne; 2022, 25, 1; 67-85
    1507-7888
    Pojawia się w:
    Roczniki Psychologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Psychometric properties of the Polish version of the Generalized Anxiety Disorder Scale (GAD-7) in a non-clinical sample of employees during pandemic crisis
    Autorzy:
    Basińska, Beata A.
    Kwissa-Gajewska, Zuzanna
    Powiązania:
    https://bibliotekanauki.pl/articles/21375403.pdf
    Data publikacji:
    2023-11-13
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    anxiety
    measurement invariance
    pandemics
    Generalized Anxiety Disorder 7-item scale
    multigroup confirmatory factor analysis
    employee wellbeing
    Opis:
    Objectives The COVID-19 outbreak is an example of a crisis that triggered an increase in generalized anxiety disorder. The study aims to validate the Polish version of the Generalized Anxiety Disorder 7-item scale (GAD-7) by Spitzer et al. among a non-clinical sample of employees and examine the invariance depending on the gender and age of working adults. Material and Methods For assessing factor structure of the Polish version of the GAD-7, the data were collected from a sample of 821 adults employed in 4 economic sectors (health care, education, IT, public administration) during the initial phase of the COVID-19 pandemic in Poland (April 10–May 24, 2020). Due to differences in the severity of GAD symptoms across gender and age groups, the measurement invariance in these groups was tested. Results The results of a series of confirmatory factor analyses confirmed the unidimensionality of the GAD-7. The values of the composite reliability index and Cronbach’s α showed that it is a reliable tool. The GAD levels demonstrated strong relationships with professional burnout, psychological distress, and psychological complaints. These relationships were stronger than the relationships between these factors and job satisfaction. Construct, metric and scalar invariance across gender and age groups were documented. Women experienced more severe symptoms of generalized anxiety disorder than men. Generalized anxiety disorder affected 28% of respondents. Conclusions This study contributes evidence of the validation of the GAD among employees and also confirms the invariance depending on gender and age. The Polish version of the GAD-7 has good psychometric properties in a group of professionals and can be recommended for research and to be used in an occupational medicine practice, especially during crisis periods associated with the risk of developing a generalized anxiety disorder.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 4; 493-504
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lie symmetries of first order neutral differential equations
    Autorzy:
    Lobo, Jervin Zen
    Valaulikar, Y.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/122564.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    determining equations
    infinitesimals
    invariance
    neutral differential equations
    splitting equations
    symmetries
    równanie różniczkowe pierwszego rzędu
    warunek niezmienności
    symetrie
    równanie różniczkowe neutralne
    Opis:
    In this paper we extend the method of obtaining symmetries of ordinary differential equations to first order non-homogeneous neutral differential equations with variable coefficients. The existing method for delay differential equations uses a Lie-Bäcklund operator and an Invariant Manifold Theorem to define the operators which are used to obtain the infinitesimal generators of the Lie group. In this paper, we adopt a different approach and use Taylor’s theorem to obtain a Lie type invariance condition and the determining equations for a neutral differential equation. We then split this equation in a manner similar to that of ordinary differential equations to obtain an over-determined system of partial differential equations. These equations are then solved to obtain corresponding infinitesimals, and hence desired equivalent symmetries. We then obtain the symmetry algebra admitted by this neutral differential equation.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 1; 29-40
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transformations within (Existentialist) Invariance in Ariel by Marina Carr with Reference to John Millington Synge’s Riders to the Sea
    Transformacje w (egzystencjalnej) niezmienności: analiza porównawcza Ariel Mariny Carr i Riders to the Sea Johna Millingtona Synge’a
    Autorzy:
    Koneczniak, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/37555754.pdf
    Data publikacji:
    2024
    Wydawca:
    Akademia Ignatianum w Krakowie
    Tematy:
    Carr, Marina
    Ariel
    Synge, John Millington
    Riders to the Sea
    analiza porównawcza
    niezmienność
    Carr
    Marina; Synge
    John Millington
    comparison
    invariance
    existentialism
    Opis:
    This article is a comparative analysis of Marina Carr’s Ariel (2002) and John Millington Synge’s Riders to the Sea. The main research context comes from common critical treatments of Carr’s oeuvre within the scope of Synge’s influences. The plays discussed in this essay have not been subject to comparative studies before (to the best of the author’s knowledge). The main argument consists in examining the loci of invariance and their transformations with reference to themes, characters’ roles, and their relationships, which will be compared in terms of notions of necessity, generational suffering, reliance on the worldly, and death in the unknown realm, partly treated within existentialism.
    Celem artykułu jest dokonanie analizy sztuki Ariel Mariny Carr i Riders to the Sea Johna Millingtona Synge’a. Twórczość Carr często traktowana jest jako kontynuacja dramaturgii Synge’a i utwory tej irlandzkiej dramatopisarki są analizowane w odniesieniu do dramatów Synge’a. Porównanie Ariel i Riders to the Sea wydaje się jednak tematem, który wciąż warto podejmować i wykazywać aspekty niezmienności i ich transformacji. Omówione porównania dotyczą takich motywów, jak: konieczność, pokoleniowe cierpienie, poleganie na doczesności oraz śmierć w nieznanej przestrzeni. Zostaną one częściowo potraktowane w swoim ogólnym odniesieniu do egzystencjalizmu.
    Źródło:
    Perspektywy Kultury; 2024, 45, 2; 213-230
    2081-1446
    2719-8014
    Pojawia się w:
    Perspektywy Kultury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid parametric islanding detection technique for microgrid system
    Autorzy:
    Jayanthi, S.
    Xavier, S. Arockia Edwin
    Manoharan, P.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173549.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed generation
    ESPRIT
    exact signal parametric rotational invariance technique
    microgrid
    battery energy storage system
    islanding
    wytwarzanie rozproszone
    mikrosiatka
    akumulatorowy system magazynowania energii
    zasilanie wyspowe
    Opis:
    In microgrid distribution generation (DG) sources are integrated parallelly for the economic and efficient operation of a power system. This integration of DG sources may cause many challenges in a microgrid. The islanding condition is termed a condition in which the DG sources in the microgrid continue to power the load even when the grid is cut off. This islanding situation must be identified as soon as possible to avoid the collapse of the microgrid. This work presents the hybrid islanding detection technique. This technique consists of both active and parametric estimation methods such as slip mode shift frequency (SMS) and exact signal parametric rotational invariance technique (ESPRIT), respectively. This technique will easily distinguish between islanding and non-islanding events even under very low power perturbations. The proposed method also has no power quality impact. The proposed method is tested with UL741 standard test conditions.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 1; e140101, 1--8
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of descriptions of continuous-time and teletraffic systems
    Porównanie opisów systemów teleinformatycznych oraz ciągłych w czasie
    Autorzy:
    Borys, A.
    Aleksiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/389811.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    network calculus
    basic properties teletraffic systems
    linearity
    causality
    time-invariance
    associativity
    commutativity
    infimum convolutions
    rachunek sieciowy
    liniowe i niezależne od czasu systemy teleinformatyczne
    własności splotu w algebrze min-plus
    Opis:
    In a fundamental book [5] on the so-called network calculus and research papers using this technique, as for example those cited in this paper, the notion of causal linear time-invariant teletraffic systems (networks) is used. It has been mentioned in [5] that these systems are analogous to the causal linear time-invariant systems (circuits) described by integral convolution (or convolution sum in the case of discrete ones) in classical systems theory. Note that networks considered in the network calculus are described by other type of convolution that uses the infimum operation. Moreover, the algebra used in the above technique is also different. This is the so-called min-plus (or max-plus) algebra. Therefore, it is not obvious that the teletraffic systems (networks) described by the infimum convolution fulfill the following basic properties: linearity, causality, time-invariance, associativity and commutativity of their convolution operator, known from the classical theory of systems. The objective of this paper is to prove or show in detail that the above properties hold.
    W znanej monografii nt. rachunku sieciowego (network calculus), napisanej przez J.-Y. Le Boudeca i P. Thirana, zostało wprowadzone pojęcie liniowych systemów teleinformatycznych niezależnych od czasu. Wskazano w niej na podobieństwa istniejące pomiędzy powyższą klasą systemów a liniowymi systemami analogowymi niezależnymi od czasu, jednakże zrobiono to w sposób dosyć pobieżny. W tym artykule podobieństwa te są przeanalizowane w sposób systematyczny, a także bez uciekania się do bardzo abstrakcyjnej teorii systemów opisywanych za pomocą algebry min-plus – jedynie przy wykorzystaniu elementarnych pojęć matematyki wyższej. Wiele przedstawionych tutaj wyprowadzeń nie było dotychczas nigdzie publikowanych, jak na przykład twierdzenie 1.
    Źródło:
    Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy; 2012, 16; 5-15
    1899-0088
    Pojawia się w:
    Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some applications of Noether’s theorem
    Autorzy:
    Montiel-Pérez, J. Yaljá
    López-Bonilla, J.
    López-Vázquez, R.
    Vidal-Beltrán, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1166045.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Complex Riemann-Silberstein vector
    Duality rotations
    Ignorable variable
    Invariance of the action
    Lanczos variational method
    Linear differential equation of second order
    Maxwell equations
    Noether’s theorem
    Variation of parameters
    Variational symmetry
    Opis:
    If the action S= ∫_(t_1)^(t_2)▒〖L(q,〗 (q,) ̇t) dt is invariant under the infinitesimal transformation t ̃=t+ε τ(q,t), q ̃_r= q_r+ε ξ_r (q,t),r=1,… ,n, with ε=constant ≪1, then the Noether’s theorem permits to construct the corresponding conserved quantity. The Lanczos approach employs to ε= q_(n+1) as a new degree of freedom, thus the Euler-Lagrange equation for this new variable gives the Noether’s constant of motion. Torres del Castillo and Rubalcava-García showed that each variational symmetry implies the existence of an ignorable coordinate; here we apply the Lanczos approach to the Noether’s theorem to motivate the principal relations of these authors. The Maxwell equations without sources are invariant under duality rotations, then we show that this invariance implies, via the Noether’s theorem, the continuity equation for the electromagnetic energy. Besides, we demonstrate that if we know one solution of p(x)y''+q(x)y'+r(x)y=0, then this Lanczos technique allows obtain the other solution of this homogeneous linear differential equation.
    Źródło:
    World Scientific News; 2018, 106; 69-80
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strzałka czasu a niektóre interpretacje mechaniki kwantowej
    Time Arrow and Some Interpretations Of Quantum Mechanics
    Autorzy:
    Łagosz, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2013391.pdf
    Data publikacji:
    2006
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    strzałka czasu
    EPR-eksperyment
    równanie Schrödingera
    (a)symetria czasowa
    niezmienniczość względem odwrócenia czasu
    pomiar kwantowy
    parametry ukryte
    time arrow
    EPR-experiment
    Schrödinger’s equation
    time (a)symetry
    time- reversal invariance
    quantal measurements
    “hidden variables”
    Opis:
    In the paper I discuss some premises of “quantum mechanics” with regard to the thesis that the time arrow does (not) exist. In this context I consider above all the famous Einstein-Podolsky-Rosen’s experiment (EPR-experiment). I also indicate Schrödinger’s interpretation of wave function “symmetrical” towards time (nomological isotropy) and the peculiar understanding of the pair particle-antiparticle, assuming that the direction of time can be reversed. Eventually, I discuss the issue of measurement in quantum mechanics with which the existence of time arrow (anisotropy) is often linked. If it comes to the interpretations of quantum mechanics, from the point of which I consider the issues in question, then in principle I limit myself to two: the so-called Copenhagen interpretation and David Bohm’s conception of “hidden parameters.” I arrive at a conclusion that the premises of quantum mechanics that are at issue here cannot be sufficient grounds for a conclusive recognition of the reversibility (non-existence) of time arrow.
    Źródło:
    Roczniki Filozoficzne; 2006, 54, 2; 391-411
    0035-7685
    Pojawia się w:
    Roczniki Filozoficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Law of the iterated logarithm type results for random vectors with infinite second moments
    Autorzy:
    Einmahl, Uwe
    Powiązania:
    https://bibliotekanauki.pl/articles/747822.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Tematy:
    Hartman-Wintner LIL, functional LIL, infinite variance, LIL behavior, very slowly varying function, cluster sets, strong invariance principle.
    PIL Hartmana-Wintnera, funkcjonalne PIL, nieskonczona wariancja, zachowania typu PIL, funkcje wolno zmieniajace sie, zbiory skupien, zasada silnej niezmienniczosci.
    Opis:
    Ten tekst jest rozszerzona wersja prezentacji autora na konferencji A path through probability in honour of F.Thomas BRUSS które odbyła sie na Unversite Libre de Bruxelles w Brukseli w dniach 9-11 wrzesnia 2015 roku. W pierwszej czesci przedstawiam niektóre wyniki uogólniajac klasyczne prawo Hartmana-Wintnera iterowanego logarytmu dla zmiennych 1-wymiarowych z nieskonczonym drugim momentem, a nastepnie pokazuje, jak te wyniki moga byc rozszerzone do zagadnien d-wymiarowych. Wywody koncze na ogólnym funkcjonalnym prawie tego typu.
    This survey paper is an extended version of the author’s presentation at the conference in honor of Professor F. Thomas Bruss at the occasion of his retirement as Chair of Math´ematiques G´en´erales from the Unversit´e Libre de Bruxelles which was held September 9-11, 2015 in Brussels. I first present some results generalizing the classical Hartman-Wintner law of the iterated logarithm to 1-dimensional variables with infinite second moments and then I show how these results can be further extended to the d-dimensional setting. Finally, I look at general functional law of the iterated logarithm type results.
    Źródło:
    Mathematica Applicanda; 2016, 44, 1
    1730-2668
    2299-4009
    Pojawia się w:
    Mathematica Applicanda
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-33 z 33

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