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    Wyświetlanie 1-36 z 36
    Tytuł:
    Positive output controllability of linear discrete–time invariant systems
    Autorzy:
    Ouyadri, Mourad
    Laabissi, Mohamed
    Achhab, Mohammed Elarbi
    Powiązania:
    https://bibliotekanauki.pl/articles/2183474.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    discrete LTI systems
    positive control
    controllability
    positive output controllability
    Opis:
    This paper studies the output controllability of discrete linear time invariant systems (LTI) with non-negative input constraints. Some geometrical arguments and positive invariance concepts are used to derive the necessary and/or sufficient conditions for the positive output controllability of discrete LTI systems. The paper also provides several academic examples, which support the theoretical results.
    Źródło:
    Control and Cybernetics; 2021, 50, 4; 521--539
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of positive time-varying linear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/387425.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    positive
    continuous-time
    minimum energy control
    procedure
    czas ciągły
    układ liniowy
    przykłady numeryczne
    Opis:
    The minimum energy control problem for the positive time-varying linear systems is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Acta Mechanica et Automatica; 2015, 9, 4; 225-228
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of fractional positive electrical circuits
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/141499.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional
    positive
    electrical circuits
    minimum energy control
    bounded
    inputs
    procedure
    Opis:
    Minimum energy control problem for the fractional positive electrical circuits is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by an example of fractional positive electrical circuit.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 2; 191-201
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of positive continuous-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/141497.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positive
    continuous-time
    minimum energy control
    bounded inputs
    procedure
    Opis:
    The minimum energy control problem for the positive continuous-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Archives of Electrical Engineering; 2014, 63, 1; 19-27
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of positive discrete-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/229247.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positive
    discrete-time
    minimum energy control
    bounded inputs
    procedure
    Opis:
    The minimum energy control problem for the positive discrete-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Archives of Control Sciences; 2013, 23, 2; 205-211
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of positive continuous-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/329898.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    positive system
    continuous time
    minimum energy control
    bounded inputs
    system dodatni
    układ ciągły
    sterowanie energooszczędne
    Opis:
    The minimum energy control problem for positive continuous-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of a solution to the problem are established. A procedure for solving the problem is proposed and illustrated with a numerical example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2013, 23, 4; 725-730
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reachability and minimum energy control of positive 2D systems with delays
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/970095.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    układ dwuwymiarowy
    rozwiązanie
    opóźnienie
    osiągalność
    2D positive system
    delay
    reachability
    solution
    minimum energy control
    Opis:
    The notion of internally positive 2D model (system) with delays is introduced. Solution of the 2D linear models with delays is derived. Necessary and sufficient conditions for the internal positivity and reachability of the models are established. The Cayley-Hamilton theorem for the 2D linear models with delays is extended. The minimum energy control for the internally positive 2D models with delays is formulated and solved.
    Źródło:
    Control and Cybernetics; 2005, 34, 2; 411-423
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of fractional positive continuous-time linear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200346.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional system
    positive system
    minimum energy control
    procedure
    Opis:
    The minimum energy control problem for the fractional positive continuous-time linear systems is formulated and solved. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 803-807
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of positive 2D continuous-discrete linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/229934.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    2D continuous-discrete
    linear
    positive
    reachability
    minimum energy control
    Opis:
    A new formulation of the minimum energy control problem for the positive 2D continuousdiscrete linear systems with bounded inputs is proposed. Necessary and sufficient conditions for the reachability of the systems are established. Conditions for the existence of the solution to the minimum energy control problem and a procedure for computation of an input minimizing the given performance index are given. Effectiveness of the procedure is demonstrated on numerical example.
    Źródło:
    Archives of Control Sciences; 2015, 25, 3; 319-331
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and finite element analysis of PPF controller effectiveness in composite beam vibration suppression
    Autorzy:
    Mitura, Andrzej
    Gawryluk, Jaroslaw
    Powiązania:
    https://bibliotekanauki.pl/articles/2172029.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    finite element method
    positive position feedback control
    composite structures
    hysteresis
    phenomenon
    macro-fiber composite
    Opis:
    In this paper the problem of vibration reduction is considered. Generally, mechanical vibrations occurring during the operation of a system are undesirable and may have a negative effect on its reliability. A finite element model of a single active blade is developed using the Abaqus software. This structure consists of a multi-layer glass-epoxy composite beam with an embedded macro fiber composite (MFC) piezoelectric actuator. For vibration control the use of a positive position feedback (PPF) controller is proposed. To include the PPF controller in the Abaqus software, a special subroutine is created. The developed control algorithm code makes it possible to solve an additional differential equation by the fourth order RungeKutta method. A numerical dynamic analysis is performed by the implicit procedure. The beam responses with and without controller activation are compared. The control subsystem model also includes the hysteresis phenomenon of the piezoelectric actuator. Numerical findings regarding the PPF controller’s effectiveness are verified experimentally.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 3; 468--477
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-fragile event-triggered control of positive switched systems with random nonlinearities and controller perturbations
    Autorzy:
    Wu, Yanqi
    Zhang, Junfeng
    Fu, Shizhou
    Powiązania:
    https://bibliotekanauki.pl/articles/2086895.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positive switched systems
    non-fragile event-triggered control
    random nonlinearities
    random controller perturbations
    systemy przełączane dodatnio
    kontrola niedelikatna wyzwalana zdarzeniami
    nieliniowość losowa
    perturbacja kontrolera losowa
    Opis:
    This paper investigates the non-fragile event-triggered control of positive switched systems with random nonlinearities and controller perturbations. The random nonlinearities and controller perturbations are assumed to obey Bernoulli and Binomial sequence, respectively. A class of linear event-triggering conditions is introduced. A switched linear co-positive Lyapunov function is constructed for the systems. For the same probability with respect to nonlinearities and controller perturbations in each subsystem, a non-fragile controller of positive switched systems is designed in terms of linear programming. Then, the different probability case is considered and the corresponding non-fragile event-triggered control is explored. Finally, the effectiveness of theoretical findings is verified via two examples.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e138566, 1--12
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of fractional positive continuous-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/330646.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fractional system
    positive system
    minimum energy control
    bounded input
    układ ułamkowy
    układ dodatni
    sterowanie energooszczędne
    Opis:
    A minimum energy control problem for fractional positive continuous-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of a solution to the problem are established. A procedure for solving the problem is proposed and illustrated with a numerical example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 335-340
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Necessary and sufficient conditions for the minimum energy control of positive discrete-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/202217.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positive
    discrete-time
    minimum energy control
    bounded inputs
    procedure
    Opis:
    The minimum energy control problem for the positive discrete-time linear systems with bounded inputs is formulated and solved. Necessary and sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 85-89
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of fractional positive continuous-time linear systems using Caputo-Fabrizio definition
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200714.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kontrola zużycia energii
    ograniczone wejścia
    definicja Caputo-Rabrizio
    fractional positive continuous-time system
    minimum energy control
    bounded inputs
    Opis:
    The Caputo-Fabrizio definition of the fractional derivative is applied to minimum energy control of fractional positive continuous- time linear systems with bounded inputs. Conditions for the reachability of standard and positive fractional linear continuous-time systems are established. The minimum energy control problem for the fractional positive linear systems with bounded inputs is formulated and solved.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 45-51
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An extension of Klamka’s method of minimum energy control to fractional positive discrete-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200464.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional
    discrete-time
    positive
    minimum energy control
    bounded inputs
    procedure
    Opis:
    The Klamka’s method of minimum energy control problem is extended to fractional positive discrete-time linear systems with bounded inputs. Sufficient conditions for the existence of solution to the problem are established. A procedure for solving of the problem is proposed and illustrated by numerical example.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 2; 227-231
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reachability and minimum energy control of positive discrete-time linear systems with multiple delays in state and control
    Osiągalność i sterowanie z minimalną energią liniowych dodatnich układów dyskretnych z wieloma opóźnieniami stanu i sterowania
    Autorzy:
    Kaczorek, T.
    Busłowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/153534.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    liniowy układ dodatni
    dyskretny
    opóźnienie
    osiągalność
    sterowanie z minimalną energią
    linear positive systems
    discrete-time systems
    time-delay
    reachability
    minimum energy control
    Opis:
    A notion of positive linear discrete-time systems with multiple delays in state and control is introduced. The necessary and sufficient conditions for positivity, reachability and minimum energy control are given. Considerations are illustrated by example.
    W pracy podano warunki, przy spełnieniu których liniowy dyskretny układ z wieloma opóźnieniami zmiennych stanu i sterowania jest układem dodatnim. Podano też warunki konieczne i wystarczające osiągalności oraz sterowania z minimalną energią. Rozważania zilustrowano przykładem.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 10, 10; 40-44
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust fractional adaptive control based on the strictly positive realness condition
    Autorzy:
    Ladaci, S.
    Charef, A.
    Loiseau, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/907854.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie odporne
    sterowanie adaptacyjne
    sprzężenie do przodu
    rachunek ułamkowy
    positive realness
    robust control
    adaptive control
    fractional adaptive control
    model reference adaptive control
    feedforward
    fractional calculus
    Opis:
    This paper presents a new approach to robust adaptive control, using fractional order systems as parallel feedforward in the adaptation loop. The problem is that adaptive control systems may diverge when confronted with finite sensor and actuator dynamics, or with parasitic disturbances. One of the classical robust adaptive control solutions to these problems makes use of parallel feedforward and simplified adaptive controllers based on the concept of positive realness. The proposed control scheme is based on the Almost Strictly Positive Realness (ASPR) property of the plant. We show that this condition implies also robust stability in the case of fractional order controllers. An application to Model Reference Adaptive Control (MRAC) with a fractional order adaptation rule is provided with an implementable algorithm. A simulation example of a SISO robust adaptive control system illustrates the advantages of the proposed method in the presence of disturbances and noise.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2009, 19, 1; 69-76
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cognitive and emotional predictors of episodic and dispositional forgiveness
    Autorzy:
    Mróz, Justyna
    Kaleta, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/2128356.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    emotional control
    positive orientation
    forgiveness
    basic hope
    affectivity
    Opis:
    The study examined the importance of cognitive (positive orientation, basic hope) and emotional (positive and negative affectivity, emotional control) variables for state and trait forgiveness. One hundred and thirty nine participants completed six inventories in Polish version: HFS (Thompson et al., 2005), TRIM (McCullough et al., 1998), P-Scale (Caprara et al., 2012), BHI-12 (Trzebiński & Zięba, 2003a), SUPIN (Polish version of PANAS; Watson, Clark, & Tellegen, 1988), CECS (Watson & Greer, 1983). Results showed that dispositional forgiveness (general and positive) was associated with cognitive and emotional predictors, whereas episodic forgiveness primarily with certain emotional variables. In addition, the results indicated that emotional predictors merely participate in the process of reducing unforgiveness, whereas cognitive and emotional variables were shown to be necessary for full forgiveness.
    Źródło:
    Polish Psychological Bulletin; 2017, 2; 143-153
    0079-2993
    Pojawia się w:
    Polish Psychological Bulletin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of 2D positive continuous-discrete linear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/386831.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    2D continuous-discrete
    linear
    positive
    reachability
    minimum energy control
    2D
    osiągalność
    sterowanie minimalnoenergetyczne
    Opis:
    The minimum energy control problem for the 2D positive continuous-discrete linear systems is formulated and solved. Necessary and sufficient conditions for the reachability at the point of the systems are given. Sufficient conditions for the existence of solution to the problem are established. It is shown that if the system is reachable then there exists an optimal input that steers the state from zero boundary conditions to given final state and minimizing the performance index for only one step (q = 1). A procedure for solving of the problem is proposed and illustrated by a numerical example.
    Źródło:
    Acta Mechanica et Automatica; 2014, 8, 3; 165-168
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimum energy control of fractional descriptor positive discrete-time linear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/330408.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fractional system
    descriptor system
    positive system
    minimum energy control
    układ ułamkowy
    układ deskrypcyjny
    układ dodatni
    sterowanie energooszczędne
    Opis:
    Necessary and sufficient conditions for the positivity and reachability of fractional descriptor positive discrete-time linear systems are established. The minimum energy control problem for descriptor positive systems is formulated and solved. Sufficient conditions for the existence of a solution to the minimum energy control problem are given. A procedure for computation of optimal input sequences and a minimal value of the performance index is proposed and illustrated by a numerical example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 4; 735-743
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Suboptimal control of nonlinear continuous-time locally positive systems using input-state linearization and SDRE approach
    Autorzy:
    Bernat, J.
    Kołota, J.
    Stępień, S.
    Superczyńska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/200111.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positive nonlinear systems
    feedback control
    Riccati equation
    sprzężenie zwrotne
    układy nieliniowe
    równanie Riccatiego
    Opis:
    The infinite time suboptimal control problem for continuous-time nonlinear positive systems is formulated and solved. A solution to the problem using input-state linearization and state-dependent Riccati equation method (SDRE) is established, a procedure for solving the problem is proposed and illustrated with a numerical example.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 17-21
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An extension of Klamka’s method to positive descriptor discrete-time linear systems with bounded inputs
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/229979.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    descriptor
    positive
    discrete-time
    linear
    system
    Weierstrass-Kronecker decomposition
    minimum energy control
    Opis:
    The minimum energy control problem for the positive descriptor discrete-time linear systems with bounded inputs by the use of Weierstrass-Kronecker decomposition is formulated and solved. Necessary and sufficient conditions for the positivity and reachability of descriptor discrete-time linear systems are given. Conditions for the existence of solution and procedure for computation of optimal input and the minimal value of the performance index is proposed and illustrated by a numerical example.
    Źródło:
    Archives of Control Sciences; 2018, 28, 2; 255-268
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling nonlinear road traffic networks for junction control
    Autorzy:
    Péter, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/330975.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    modelowanie matematyczne
    układ dodatni nieliniowy
    liniowa funkcja Lapunowa
    mathematical modeling
    mathematical control
    traffic networks
    nonlinear positive system
    linear Lyapunov function
    Opis:
    The paper introduces a method of mathematical modeling of high scale road traffic networks, where a new special hypermatrix structure is intended to be used. The structure describes the inner-inner, inner-outer and outer-outer relations, and laws of a network area. The research examines the nonlinear equation system. The analysed model can be applied to the testing and planning of large-scale road traffic networks and the regulation of traffic systems. The elaborated model is in state space form, where the states are vehicle densities on a particular lane and the dynamics are described by a nonlinear state constrained positive system. This model can be used directly for simulation and analysis and as a starting point for investigating various control strategies. The stability of the traffic over the network can be analyzed by constructing a linear Lyapunov function and the associated theory. The model points out that in intersection control one must take the traffic density values of both the input and the output sections into account. Generally, the control of any domain has to take the density of input and output sections into consideration.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 723-732
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Learning from authoritarian teachers: Controlling the situation or controlling yourself can sustain motivation
    Autorzy:
    Chaffee, Kathryn E.
    Noels, Kimberly A.
    McEown, Maya Sugita
    Powiązania:
    https://bibliotekanauki.pl/articles/780643.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    primary control
    secondary control
    positive reappraisal
    motivation
    controlling instructor
    Opis:
    Positive psychology encompases the study of positive outcomes, optimal functioning, and resilience in difficult circumstances. In the context of language learning, positive outcomes include academic engagement, self-determined motivation, persistence in language learning, and eventually becoming a proficent user of the language.
    Źródło:
    Studies in Second Language Learning and Teaching; 2014, 4, 2; 355-387
    2083-5205
    2084-1965
    Pojawia się w:
    Studies in Second Language Learning and Teaching
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperchaos, adaptive control and synchronization of a novel 5-D hyperchaotic system with three positive Lyapunov exponents and its SPICE implementation
    Autorzy:
    Vaidyanathan, S.
    Volos, C.
    Pham, V.-T.
    Powiązania:
    https://bibliotekanauki.pl/articles/229321.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    hyperchaos
    control
    synchronization
    circuit realization
    Opis:
    In this research work, a twelve-term novel 5-D hyperchaotic Lorenz system with three quadratic nonlinearities has been derived by adding a feedback control to a ten-term 4-D hyperchaotic Lorenz system (Jia, 2007) with three quadratic nonlinearities. The 4-D hyperchaotic Lorenz system (Jia, 2007) has the Lyapunov exponents L1 = 0.3684,L2 = 0.2174,L3 = 0 and L4 =−12.9513, and the Kaplan-Yorke dimension of this 4-D system is found as DKY =3.0452. The 5-D novel hyperchaotic Lorenz system proposed in this work has the Lyapunov exponents L1 = 0.4195,L2 = 0.2430,L3 = 0.0145,L4 = 0 and L5 = −13.0405, and the Kaplan-Yorke dimension of this 5-D system is found as DKY =4.0159. Thus, the novel 5-D hyperchaotic Lorenz system has a maximal Lyapunov exponent (MLE), which is greater than the maximal Lyapunov exponent (MLE) of the 4-D hyperchaotic Lorenz system. The 5-D novel hyperchaotic Lorenz system has a unique equilibrium point at the origin, which is a saddle-point and hence unstable. Next, an adaptive controller is designed to stabilize the novel 5-D hyperchaotic Lorenz system with unknown system parameters. Moreover, an adaptive controller is designed to achieve global hyperchaos synchronization of the identical novel 5-D hyperchaotic Lorenz systems with unknown system parameters. Finally, an electronic circuit realization of the novel 5-D hyperchaotic Lorenz system using SPICE is described in detail to confirm the feasibility of the theoretical model.
    Źródło:
    Archives of Control Sciences; 2014, 24, 4; 409-446
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reachability of linear hybrid systems described by the general model
    Autorzy:
    Kaczorek, T.
    Rogowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/229830.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    reachability
    standard
    positive
    general model
    hybrid systems
    piecewise constant control
    Opis:
    The reachability of standard and positive hybrid linear systems described by the general model is addressed. Necessary and sufficient conditions for the reachability of the standard general model are established. Sufficient condition is given for the reachability of positive hybrid system described by the general model. The considerations are illustrated by numerical examples.
    Źródło:
    Archives of Control Sciences; 2010, 20, 2; 199-207
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Affectivity and Self-Forgiveness. The Role of Control of Negative Emotions: Short Report
    Autorzy:
    Mróz, Justyna
    Kaleta, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/31340963.pdf
    Data publikacji:
    2022
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    positive affect
    negative affect
    self-forgiveness
    control of emotions
    anger control
    Opis:
    Self-forgiveness is a process in which emotions, thoughts, and behaviours towards oneself are changed from negative to neutral or positive. In this study, we examined affectivity and emotional control (of anger, depression, anxiety) as emotional factors promoting or discouraging self-forgiveness. We examined self-forgiveness among Polish adults (N = 380, Mage = 36.26). Respondents completed the Polish version of the Positive Affect Negative Affect Scale, the Courtauld Emotional Control Scale (CECS), and the self-forgiveness subscale of Touissant’s Forgiveness Scale. In our cross-sectional study, we tested the moderating role of emotional control in the relationship between affectivity and self-forgiveness. Our results showed that positive affect was positively correlated with self-forgiveness, whereas negative affect was inversely correlated with self-forgiveness. Additionally, emotional control (anger, depression) was negatively correlated with self-forgiveness. Finally, total control of emotions and control of anger were found to be buffers between negative affect and self-forgiveness, the effect of negative affect on self-forgiveness being weaker among individuals who were more anger-controlling. The obtained results are a prelude to further research into the relationship between affectivity and self-forgiveness.
    Źródło:
    Roczniki Psychologiczne; 2022, 25, 3; 239-249
    1507-7888
    Pojawia się w:
    Roczniki Psychologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On real order passivity
    Autorzy:
    Gallegos, J. A.
    Duarte-Mermoud, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200762.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    passivity
    dissipativeness
    adaptive
    passivation
    nonlinear mixed-order system
    positive realness
    control of nonlinear systems
    pasywność
    rozproszenie
    adaptacja
    pasywacja
    Opis:
    The aim of this paper is to show that a real order generalization of the dissipative concepts is a useful tool to determine the stability (in the Lyapunov and in the input-output sense) and to design control strategies not only for fractional order non-linear systems, but also for systems composed of integer and fractional order subsystems (mixed-order systems). In particular, the fractional control of integer order system (e.g. PI? control) can be formalized. The key point is that the gradations of dissipativeness, passivity and positive realness concepts are related among them. Passivating systems is used as a strategy to stabilize them, which is studied in the non-adaptive as well as in the adaptive case.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 445-454
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opracowanie metody wyznaczenia zastępczych charakterystyk sprawnościowych dla pomp wyporowych
    Autorzy:
    Osiński, P.
    Bury, P.
    Cieślicki, R.
    Noworolnik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/303121.pdf
    Data publikacji:
    2016
    Wydawca:
    Wydawnictwo Druk-Art
    Tematy:
    pompa wyporowa
    badania hydrauliczne
    sterowanie pneumatyczne
    positive displacement pump
    hydraulic research
    pneumatic control
    Opis:
    W artykule przedstawiona została metoda wyznaczania zastępczych charakterystyk sprawnościowych. Opisane zostało zastosowanie metody, warunki przeprowadzenia badań oraz algorytm opracowania i przedstawiania uzyskanych charakterystyk.
    This paper presents method of creating vicarious efficiency characteristics. Here is described utility, conditions for research and the method of elaborate and present the characteristics.
    Źródło:
    Napędy i Sterowanie; 2016, 18, 2; 130-136
    1507-7764
    Pojawia się w:
    Napędy i Sterowanie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Pet Therapy Concurrent with Common Medication on Positive, Negative, Cognitive and Motor Symptoms of Schizophrenia: A randomized control trial
    Autorzy:
    Nazarian, Zahra
    Rezaei, Omid
    Armoon, Bahram
    Banihashem, Seyedshahab
    Hamideh, Mostafa
    Powiązania:
    https://bibliotekanauki.pl/articles/2127431.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pet therapy
    positive symptoms of schizophrenia
    negative symptoms of schizophrenia
    cognitive symptoms of schizophrenia
    motor symptoms of schizophrenia
    Opis:
    Background: Pet therapy could help individuals improve their emotions; and physical and mental health. It also could be effective in the treatment of pain, anxiety, depression, and fatigue. The aim of this study was to determine the effectiveness of pet therapy, concurrent with common medication on positive, negative, cognitive and motor symptoms of schizophrenia. Methods: This was a randomized control trial. Statistical population of the current study included all patients who were admitted to the Razi Psychiatric Center of Tehran and received a diagnosis of schizophrenia based on a clinical interview and DSM criteria by a psychiatrist. Thirty six patients were recruited using snowball sampling. Members of the experimental group were transported by a bus to that spot at 9 a.m on the planned days, in the company of the researcher and a nurse. Patients gave care of the rabbits (including feeding, tidying their cages, moving their cages) for 24 sessions of 90 minutes, three days per week during autumn 2016. The One-way covariance test was also used to evaluate effects of Pet therapy on positive, negative, cognitive and motor symptoms of schizophrenia. Results: finding indicated that considering scores of pre-test for positive, negative and cognitive symptoms, there is a significant difference between the two controls and experimental groups, respectively, (F = 17.04, p < 0.05), (F = 17.39, p < 0.05), (F = 152.12, p < 0.05). Conclusion: Pet therapy could be successfully applied by parents, psychologists and care givers of these patients. We suggest using pet therapy for treatment of other psychiatric disorders as well and preferably like dogs and cats.
    Źródło:
    Polish Psychological Bulletin; 2018, 49, 2; 200-206
    0079-2993
    Pojawia się w:
    Polish Psychological Bulletin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust performance of a class of control systems
    Autorzy:
    Wang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/970421.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    system niepewny
    analiza odporności
    stabilność Hurwitza
    D-stabilność
    funkcja przenoszenia
    uncertain systems
    robustness analysis
    Kharitonov's theorem
    complex interval polynomials
    polynomial matrix family
    Hurwitz stability
    D-stability
    transfer functions
    strict positive realness
    Opis:
    Some Kharitonov-like robust Hurwitz stability criteria are established for a class of complex polynomial families with nonlinearly correlated perturbations. These results are extended to the polynomial matrix case and non-interval D-stability case. Applications of these results in testing of robust strict positive realness of real and complex interval transfer function families are also presented.
    Źródło:
    Control and Cybernetics; 2004, 33, 1; 71-83
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent Developments in Theory of Positive Discrete-Time Linear Systems with Delays - Rechability, Minimum Energy Control and Realization Problem
    Wybrane nowe wyniki w teorii liniowych dodatnich układów dyskretnych z opóźnieniami - osiągalność, sterowanie z minimalną energią i problem realizacji
    Autorzy:
    Kaczorek, T.
    Busłowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/158185.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    linear systems
    Opis:
    Notion of the positive linear discrete-time
    W pracy podano warunki, jakie musi spełniać dyskretny
    Źródło:
    Pomiary Automatyka Kontrola; 2004, R. 50, nr 10, 10; 12-15
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability analysis and H∞ control of discrete T–S fuzzy hyperbolic systems
    Autorzy:
    Duan, R.
    Li, J.
    Zhang, Y.
    Yang, Y.
    Chen, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/331173.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    discrete T–S fuzzy hyperbolic model
    parallel distributed compensation
    positive diagonally dominant matrices
    robust stability
    model Takagi-Sugeno
    kompensacja rozproszona
    sterowanie odporne
    Opis:
    This paper focuses on the problem of constraint control for a class of discrete-time nonlinear systems. Firstly, a new discrete T–S fuzzy hyperbolic model is proposed to represent a class of discrete-time nonlinear systems. By means of the parallel distributed compensation (PDC) method, a novel asymptotic stabilizing control law with the “soft” constraint property is designed. The main advantage is that the proposed control method may achieve a small control amplitude. Secondly, for an uncertain discrete T–S fuzzy hyperbolic system with external disturbances, by the proposed control method, the robust stability and H∞ performance are developed by using a Lyapunov function, and some sufficient conditions are established through seeking feasible solutions of some linear matrix inequalities (LMIs) to obtain several positive diagonally dominant (PDD) matrices. Finally, the validity and feasibility of the proposed schemes are demonstrated by a numerical example and a Van de Vusse one, and some comparisons of the discrete T–S fuzzy hyperbolic model with the discrete T–S fuzzy linear one are also given to illustrate the advantage of our approach.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 1; 133-145
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of the economic crisis on the financial situation of enterprises of the quality outsourcing sector
    Wpływ kryzysu gospodarczego na sytuację finansową przedsiębiorstw sektora outsourcingu jakości
    Autorzy:
    Puto, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2149927.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    outsourcing usług
    motoryzacja
    kontrola jakości
    pozytywne skutki kryzysu
    negatywne skutki kryzysu
    service outsourcing
    automotive industry
    quality control
    positive effects of crisis
    negative effects of crisis
    Opis:
    The article describes the impact of the economic crisis caused by the global COVID-19 pandemic on enterprises from the service outsourcing industry operating in 11 European countries. The following research objectives have been indicated: 1) learning the opinions of managers on the crisis and its impact on the company, 2) indicating positive and negative features of the economic situation related to the global pandemic, 3) the analysis of the financial situation during the pandemic. The methodology adopted in the research is based on the descriptive approach, using the case study analysis. For the purposes of the research, the structured interview questionnaire was used. The questions asked concerned the description of the specificity of the business, the company’s location, the impact of the economic crisis on the situation of enterprises, the description of the positive and negative impact of the crisis on the operation of enterprises. The area of interest covered the subjective opinions of managers on the existing economic situation, which is metaphorically compared to the black swan in the article. The research conducted in the companies from 11 European countries indicated that in the period of March-August 2020, due to the strong dependence of the sector on the automotive industry, the companies were affected by the crisis. The turnover and the number of employees decreased dramatically. The slow recovery of contractors from the crisis as well as the change in customer approach to staff employment have changed the operating conditions of the quality outsourcing sector companies. Flexible adaptation to customer requirements has brought about that all the analyzed companies recorded an increase in the sales of their services, counting on the further good prosperity of the industry.
    W artykule opisano wpływ kryzysu gospodarczego wywołanego globalną pandemią COVID-19 na przedsiębiorstwa z branży outsourcingu usług działające w 11 krajach Europy. Wskazano na następujące cele badawcze: 1) poznanie opinii menedżerów na temat kryzysu i jego wpływu na firmę, 2) wskazanie pozytywnych i negatywnych cech sytuacji gospodarczej związanej z pandemią światową, 3) analiza sytuacji finansowej podczas pandemii. Metodologia przyjęta w badaniu opiera się na podejściu opisowym, wykorzystując analizę studium przypadku. Na potrzeby badań wykorzystano ustrukturyzowany kwestionariusz wywiadu. Zadawane pytania dotyczyły opisu specyfiki działalności, lokalizacji firmy, wpływu kryzysu gospodarczego na sytuację przedsiębiorstw, opisu pozytywnego i negatywnego wpływu kryzysu na działalność przedsiębiorstw. W obszarze zainteresowania znalazły się subiektywne opinie menedżerów na temat istniejącej sytuacji gospodarczej, którą w artykule porównano metaforycznie do czarnego łabędzia. Badania przeprowadzone w firmach z 11 krajów europejskich wskazały, że w okresie marzec-sierpień 2020 r., ze względu na silne uzależnienie sektora od branży motoryzacyjnej, firmy zostały dotknięte kryzysem. Obroty i liczba pracowników drastycznie spadły. Powolne wychodzenie kontrahentów z kryzysu, a także zmiana podejścia klientów do zatrudniania pracowników zmieniły warunki działania firm z sektora outsourcingu wysokiej jakości. Elastyczne dostosowywanie się do wymagań klientów sprawiło, że wszystkie analizowane firmy odnotowały wzrost sprzedaży swoich usług, licząc na dalszą dobrą koniunkturę branży.
    Źródło:
    Polish Journal of Management Studies; 2021, 23, 2; 403--420
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oznakowanie robót drogowych – studium przypadków
    Marking of road works - examples of bad solutions
    Autorzy:
    Konkel, Natalia
    Wachnicka, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/24024756.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
    Tematy:
    pionowe znaki drogowe
    urządzenia bezpieczeństwa ruchu drogowego
    roboty drogowe
    bezpieczeństwo strefy robót
    oznakowanie stref robót drogowych
    organizacja ruchu czasowa
    vertical traffic signs
    road safety devices
    portable positive protection
    road works
    work zone safety
    marking of road work zones
    temporary traffic management
    temporary traffic control
    Opis:
    W artykule przedstawiono zagadnienia związane ze sposobami oznaczania stref robót drogowych oraz stanem technicznym zastosowanych znaków pionowych i urządzeń bezpieczeństwa ruchu drogowego. Wpływ na bezpieczeństwo, oprócz nieodpowiedniego umiejscowienia oznakowania, ma również jego odblaskowość oraz czytelność. Omawiane niespełnienie wymagań przedmiotowych cech wynika z nienależytego dbania o zapewnienie właściwych parametrów i stanu technicznego używanych znaków pionowych i urządzeń bezpieczeństwa ruchu drogowego do oznakowania tymczasowych organizacji ruchu oraz w całym okresie ich stosowania. W głównej części artykułu opisano inwentaryzację istniejącego oznakowania na drogach w czasie prowadzenia prac budowlanych oraz przeprowadzono analizę zastosowanej organizacji ruchu, stanu technicznego znaków drogowych i wpływu tych elementów na bezpieczeństwo użytkowników ruchu drogowego.
    This paper deals with ways of signing of road works areas and the technical condition of signs and traffic safety devices, and the impact on safety, in addition to the incorrect location of the marking, and its retro-reflective and legibility. This non-compliance with the requirements of the characteristics in question results from care not being taken to ensure that the signs and safety devices used are in good working order and throughout the period of application of the temporary traffic organization. The main part of the paper describes the inventory of existing road markings during construction work and analyzes the traffic organization used, the state of the road signs and the impact of these elements on the safety of road users.
    Źródło:
    Drogownictwo; 2022, 4; 114--123
    0012-6357
    Pojawia się w:
    Drogownictwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zagadnienie skuteczności pomocy społecznej. Symboliczna (oczekiwana) tożsamość klienta pomocy społecznej. Pomoc społeczna jako gra o kontrolę sfer niepewności. (Raport z badań)
    A social assisstance effectiveness issue.Symbolic (expected) identity of social services customers.Social services as games for spheres of uncertainty control (research report)
    Autorzy:
    Rossa, Jerzy
    Nogal-Faber, Lidia
    Powiązania:
    https://bibliotekanauki.pl/articles/1929269.pdf
    Data publikacji:
    2021-12-22
    Wydawca:
    Akademia im. Jakuba z Paradyża w Gorzowie Wielkopolskim
    Tematy:
    social assistance
    social policy
    pedagogical environment
    institutional-organizationalenvironment
    normative model
    positive-pragmatic model
    medical model
    utilitarian model
    salvific model
    Opis:
    The article pertain to a case study research of social assistance processes in a social policy system of G. city. A main method of investigation was opened, unstandardized systematic interviews with social workers, political figures and administrators of the system. Social services in experiences of our respondents we have interpreted as games for uncertainty control. The games in perspectives of social workers and administrators of the system we understand as pedagogical environments for customers which in the processes of these interactional games shape many of the social, adaptive skills. Such skills enable customers institutional identity management and effective winning spheres of freedom from control. Behavioural strategies of social workers in institutional and organizational environment in relation to customers we conceptualize as exchange models of a “gift for power” above customers spheres of uncertainty control. Inefficiency of social assistance comes from incapacity of such aid to effectively exchange gifts for uncertainty control in daily situations for customers. The Institution of social services has many functional substitutes in social, political and economic environments which are much more effective. Second goal of our investigation was a presentation and portrayal of the real pedagogical environment of social workers. Theory of social intervention and social pedagogy suffers from too many abstracts from reality foundations, premises und presumptions. So social pedagogy as practical science needs also careful and diligent investigation of
    Źródło:
    Język. Religia. Tożsamość; 2021, 2(24) B; 59-87
    2083-8964
    2544-1701
    Pojawia się w:
    Język. Religia. Tożsamość
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-36 z 36

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