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    Wyświetlanie 1-14 z 14
    Tytuł:
    Refugee Question as an International Global Problem
    Autorzy:
    Potyrała, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/642218.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Refugee Question
    Global problem
    Opis:
    The problem of refugees is a phenomenon characteristic of contemporary international relations. It can take an individual form (as a result of individual persecutions of a racial, religious, national or political character) or the form of mass relocations, especially in the face of military conflicts or general breaching of human rights. The purpose of this paper is to present the refugee question as an international global problem that may appear in any region of the world, impacting the situation of states and societies, that is perceived as both a threat and a fundamental challenge for the entire international community.
    Źródło:
    Przegląd Strategiczny; 2014, 7; 307-322
    2084-6991
    Pojawia się w:
    Przegląd Strategiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in health - a global problem and its various aspects
    Autorzy:
    Wojtyla, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/49391.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    health
    global problem
    human health
    human disease
    agriculture
    rural area
    hazard
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2011, 18, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the global asymptotic stability problem and the Jacobian conjecture
    Autorzy:
    Drużkowski, L. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839158.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    hipoteza jakobianu
    global stability problem
    Jacobian Conjecture
    Opis:
    In this survey, we recall the formulation of the problems and give a review of some nontrivial results in the area. Let F = (F1,...,Fn] : R^n - --> R^n be a C^1 map and let F'(x) and Jac F(x) = det F'(x) denote the Jacobian matrix and the jacobian of F at a point x belongs to R^n, respectively. The Global Asymptotic Stability Problem (GASP) reads as follows: Assume that F(0] = 0 and at any point x belongs to R^n all eigenvalues of F'(x) have negative real parts. Then consider the associated system of differential equations x'j(t] = Fj(x1(t), ...,Xn(t)), j = 1,...,n. The question is whether the solution x[t] = 0 is globally asymptotically stable. If n > 2, then the answer is negative (even if F is a a polynomial automorphism), so from now on (GASP) denotes (GASP) restricted to R^2. In 1963, Olech showed that under the (GASP) assumption (i. e., Jac F[x) > 0 and Trace F'(x) = [...] < 0 for any x belong to R^2) the conclusion of (GASP) is equivalent to the injectivity of F. In 1994, Fessler, and independently Gutierrez, proved the injectivity of F and, due to the above mentioned Olech's equivalence, gave the affirmative answer to the two-dimensional (GASP). Let K denote R or C, n > 1. The Jacobian Conjecture can be formulated as follows: If F = (F1, ... ,Fn) : K^n --> K^n is a polynomial map with a constant nonzero jacobian, then F is a polynomial automorphism (i.e. there exists F^-1 and F^-1 is also a polynomial map). Although the Jacobian Conjecture is still unsolved even in the case of n = 2, it is convenient, to consider the so called Generalized Jacobian Conjecture (for short (GJC)): the Jacobian Conjecture holds for every n > 1. We give a review of some interesting conditions equivalent to the Jacobian Conjecture, including Meisters and Olech's result on the existence of a poly-flow solution of the associated Ważewski equation x'(t) = [F'(x(t))]^-1 (a). We also present, a reduction of (GJC) to the case of F of degree 3 and of special forms, then some partial results, and (JC)'s relations with other problems.
    Źródło:
    Control and Cybernetics; 2005, 34, 3; 747-762
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sediment open water disposal in the aspect of environmental hazard. General trends. Current scientific literature review
    Deponowanie urobku czerpalnego do otwartej toni wodnej w aspekcie zagrożenia dla środowiska. Ogólne trendy. Przegląd aktualnej literatury naukowej
    Autorzy:
    Zegarowski, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/111567.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Morski w Gdańsku
    Tematy:
    dumping site
    sediment dumping
    global problem
    impact of dumping
    pollutions
    general trends
    minimazing the negative impact
    klapowisko
    deponowanie osadów dennych
    globalny problem
    wpływ klapowania
    zanieczyszczenia
    ogólne trendy
    ograniczanie negatywnego oddziaływania
    Opis:
    Disposal into the open water body is the most common practice with dredged sediments from water objects. These actions may disrupt the balance inside and around dumping area. Accumulated in sediments anthropogenic pollution such as heavy metals and persistent organic compounds impact on the environment over a longer period of time. Dumping into aquatic ecosystems million tons of spoils from dredging causes a number of concerns in the international arena. A large number of global treaties and protocols were signed to minimize the negative environmental impact of contaminated sediment from dredging process. According to current scientific papers, the study shows the sources of environmental risks and general trends stemming from this practice. Furthermore, it indicates directions of activities aimed at minimizing the negative impact of human activities resulting from the excavation of waste material brought up from dredging.
    Deponowanie urobku czerpalnego z prac pogłębiarskich do otwartej toni wodnej jest najczęściej praktykowanym rozwiązaniem . Takie działania mogą zakłócić równowagę w środowiska wewnątrz oraz wokół obszaru klapowiska. Nagromadzone w osadach dennych zanieczyszczenia mające charakter antropogeniczny , takie jak metale ciężkie i trwałe związki organiczne, mogą oddziaływać na środowisko w dłuższej perspektywie czasu. Klapowanie milionów ton rocznie osadów, z pogłębiania obiektów wodnych, wywołuje liczne obawy na arenie międzynarodowej. Aby zminimalizować negatywne oddziaływanie urobku deponowanego na klapowiskach podpisano wiele traktatów oraz protokołów o wymiarze globalnym. W oparciu o aktualną literaturę naukową przedstawiono potencjalne zagrożenia oraz trendy wynikające z procesu klapowania osadów dennych z prac pogłębiarskich. Ponadto, wskazano kierunki działań mających na celu ograniczenie negatywnego wpływu działalności człowieka wynikających z klapowania do akwenów morskich.
    Źródło:
    Biuletyn Instytutu Morskiego w Gdańsku; 2015, 30, 1; 118-125
    1230-7424
    2450-5536
    Pojawia się w:
    Biuletyn Instytutu Morskiego w Gdańsku
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prospects of convergent technologies usage in solving the global energy problem
    Autorzy:
    Matyushenko, Igor Yu.
    Azarenkova, Olesia V.
    Powiązania:
    https://bibliotekanauki.pl/articles/106061.pdf
    Data publikacji:
    2019
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    biotechnology
    biofuels
    convergent technologies
    global energy problem
    nuclear energy
    alternative energy
    energy security
    thermonuclear energy
    biotechnologia
    biopaliwa
    technologie konwergentne
    globalny problem energetyczny
    energia nuklearna
    energia alternatywna
    bezpieczeństwo energetyczne
    energia termojądrowa
    Opis:
    The article summarizes the main findings regarding a study on global problems, with an emphasis on global energy problems and possible solutions. To find solutions to global problems, the conditions of the new industrial revolution were taken into account, the features of technological development of economies in countries worldwide were investigated and, namely the essence of economic paradigms aimed at solving global problems was determined. Convergence of NBIC-technologies as a key factor of the new industrial revolution were characterized, and the process of converging knowledge, technologies and society as a mechanism for solving global problems was studied. Trends in the development of scientific and technical, innovative activities in Ukraine and countries worldwide were determined. In particular, the main directions for development of converging and advanced production technologies that are most promising for developed countries, developing countries and Ukraine are presented.
    Źródło:
    Acta Innovations; 2019, 32; 51-62
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Abstract parabolic problem with non-Lipschitz nonlinearity
    Autorzy:
    Cholewa, Jan
    Dlotko, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1207637.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    dissipative semigroup
    parabolic system
    Cauchy problem
    global attractor
    global solution
    Opis:
    An abstract parabolic equation with sectorial operator and continuous nonlinearity is studied in this paper. In particular, the asymptotic behavior of solutions is described within the framework of the theory of global attractors. Examples included in the final part of the paper illustrate the presented ideas.
    Źródło:
    Banach Center Publications; 2000, 52, 1; 73-81
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global solutions for a nonlinear Kirchhoff type equation with viscosity
    Autorzy:
    Lapa, Eugenio Cabanillas
    Powiązania:
    https://bibliotekanauki.pl/articles/29519609.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    global solutions
    nonlinear Kirchhoff type problem
    exponential decay
    Opis:
    In this paper we consider the existence and asymptotic behavior of solutions of the following nonlinear Kirchhoff type problem $ u_{t t} - M ( \int_\Omega | \nabla u |^2 dx ) \Delta u - \delta \Delta u_t = \mu | u |^{p-2} u $ in $ \Omega \times ]0, \infty [ $ where $ M(s) = $ ⎧ $ a - bs $ for $ s \in [0, a/b [$, ⎨ ⎩ $ 0, $ for $ s \in [ a/b, + \infty ] $. If the initial energy is appropriately small, we derive the global existence theorem and its exponential decay.
    Źródło:
    Opuscula Mathematica; 2023, 43, 5; 689-701
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A sequential and global method of solving an inverse problem of heat conduction equation
    Sekwencyjna i globalna metoda rozwiązania zagadnienia odwrotnego dla równania przewodnictwa ciepła
    Autorzy:
    Ciałkowski, M.
    Grysa, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/280136.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    inverse problem
    heat conduction
    sequential method
    global method
    Opis:
    The paper presents a solution to an inverse problem based on the analy- tical form of the direct problem solution in the convolutional form. The analytical form T (r, t) is a surface that is fitted to temperature patterns measured (and charged with errors) at the internal points. In the case of quickly-varying patterns, the solution to the inverse problem is highly sen- sitive to measurement errors (short sampling times). In order to obtain reliable results, the method of sequential (step by step) and global solving of the inverse problem was used together with smoothing the measurement results with the help of hyperbolic spline functions. The numerical results confirm effectiveness of the methods presented in the paper.
    W pracy przedstawiono rozwiązanie zagadnienia odwrotnego w oparciu o analityczną postać rozwiązania zagadnienia prostego w postaci splotowej. Ta postać analityczna T (r, t) jest powierzchnią, która jest dopasowywana do przebiegów temperatury pomierzonej (obciążonej błędem) w punktach wewnętrznych. Dla przebiegów szybkozmiennych rozwiązanie zagadnienia odwrotnego jest bardzo wrażliwe na błędy pomiarów (małe czasy próbkowania). Dla otrzymania wiarygodnych wyników zastosowano metodę sekwencyjnego (z kroku na krok) i globalnego rozwiązywania zagadnienia odwrotnego w połączeniu z wygładzaniem wyników pomiarowych za pomocą hiperbolicznych funkcji sklejanych. Wyniki obliczeń numerycznych potwierdzają efektywność przedstawionych metod.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2010, 48, 1; 111-134
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the global existence theorem for a free boundary problem for equations of a viscous compressible heat conducting fluid
    Autorzy:
    Zadrzyńska, Ewa
    Zajączkowski, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/1311132.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    viscous compressible heat conducting fluid
    global existence
    free boundary problem
    Opis:
    We consider the motion of a viscous compressible heat conducting fluid in ℝ³ bounded by a free surface which is under constant exterior pressure. Assuming that the initial velocity is sufficiently small, the initial density and the initial temperature are close to constants, the external force, the heat sources and the heat flow vanish, we prove the existence of global-in-time solutions which satisfy, at any moment of time, the properties prescribed at the initial moment.
    Źródło:
    Annales Polonici Mathematici; 1996, 63, 3; 199-221
    0066-2216
    Pojawia się w:
    Annales Polonici Mathematici
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neumann problem for one-dimensional nonlinear thermoelasticity
    Autorzy:
    Shibata, Yoshihiro
    Powiązania:
    https://bibliotekanauki.pl/articles/1361114.pdf
    Data publikacji:
    1992
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    classical solutions
    Neumann problem
    global existence
    one-dimensional nonlinear thermoelasticity
    Opis:
    The global existence theorem of classical solutions for one-dimensional nonlinear thermoelasticity is proved for small and smooth initial data in the case of a bounded reference configuration for a homogeneous medium, considering the Neumann type boundary conditions: traction free and insulated. Moreover, the asymptotic behaviour of solutions is investigated.
    Źródło:
    Banach Center Publications; 1992, 27, 2; 457-480
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tabu search: global intensification using dynamic programming
    Autorzy:
    Wilbaut, C.
    Hanafi, S.
    Fréville, A.
    Balev, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/970871.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    programowanie dynamiczne
    tabu search
    dynamic programming
    global intensification
    multidimensional 0-1 knapsack problem
    Opis:
    Tabu search has proven highly successful in solving hard combinatorial optimization problems. In this paper, we propose a hybrid method that combines adaptive memory, sparse dynamic programming, and reduction techniques to reduce and explore the search space. Our approach starts with a bi-partition of the variables, involving a small core problem, which never exceeds 15 variables, solved using the "forward" phase of the dynamic programming procedure. Then, the remaining subspace is explored using tabu search, and each partial solution is completed with the information stored during the forward phase of dynamic programming. Our approach can be seen as a global intensification mechanism, since at each iteration, the move evaluations involve solving a reduced problem implicitly. The proposed specialized tabu search approach was tested in the context of the multidimensional 0-1 knapsack problem. Our approach was compared to ILOG's commercial product CPLEX and to the corresponding "pure" tabu search (i.e., without a core problem) for various sets of test problems available in OR-libraries. The results are encouraging. In particular, this enhances the robustness of the approach, given that it performs better than the corresponding pure tabu search most of the time. Moreover, our approach compares well with CPLEX when the number of variables is large; it is able to provide elite feasible solutions in a very reasonable amount of computational time.
    Źródło:
    Control and Cybernetics; 2006, 35, 3; 579-598
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Innovative advantages ranking : a new approach
    Autorzy:
    Gogodze, Joseph
    Powiązania:
    https://bibliotekanauki.pl/articles/406269.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    global innovation index
    Markov chain
    analytic hierarchy process
    multi-objective decision
    making problem
    globalny indeks innowacji
    łańcuch Markowa
    proces hierarchii analitycznej
    Opis:
    Assessing/ranking the innovative advantages of countries is a problem of current interest. However, the set of tools used for this purpose are very narrow and often prone to criticism. The aim of this study is to somewhat extend the arsenal of methods used to this end. For this purpose, based on a data set from the Global Innovation Index, this study develops a special multi-objective decision-making problem, the aim of which is to identify the “best countries” in the sense of their innovative advantage. Moreover, applying ranking methods (in our case the Markov-chain method and analytic hierarchy process) to this multi-objective decision-making problem, we obtain new alternative ratings/rankings of the innovative advantages of countries.
    Źródło:
    Operations Research and Decisions; 2019, 29, 1; 5-15
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The corridor method: a dynamic programming inspired metaheuristic
    Autorzy:
    Sniedovich, M.
    Viß, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/970877.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    programowanie dynamiczne
    metaheuristics
    dynamic programming
    curse of dimensionality
    very large neighborhoods
    corridor method
    global optimization
    move-based
    method-based
    traveling salesman problem
    Opis:
    This paper presents a dynamic programming inspired metaheuristic called Corridor Method. It can be classified as a method-based iterated local search in that it deploys method-based neighborhoods. By this we mean that the search for a new candidate solution is carried out by a fully-fledged optimization method and generates a global optimal solution over the neighborhood. The neighborhoods are thus constructed to be suitable domains for the fully-fledged optimization method used. Typically, these neighborhoods are obtained by the imposition of exogenous constraints on the decision space of the target problem and therefore must be compatible with the optimization method used to search these neighborhoods. This is in sharp contrast to traditional metaheuristics where neighborhoods are move-based, that is, they are generated by subjecting the candidate solution to small changes called moves. While conceptually this method-based paradigm applies to any optimization method, in practice it is best suited to support optimization methods such as dynamic programming, where it is easy to control the size of a problem, hence the complexity of algorithms, by means of exogenous constraints. The essential features of the Corridor Method are illustrated by a number of examples, including the traveling salesman problem, where exponentially large neighborhoods are searched by a linear time/space dynamic programming algorithm.
    Źródło:
    Control and Cybernetics; 2006, 35, 3; 551-578
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A stable homotopy approach to horizontal linear complementarity problems
    Autorzy:
    Ralph, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/206132.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    ciągłość pseudo-Lipschitza
    metoda homotopii
    rozwiązanie stałe
    system kawałkami afiniczny
    active set method
    global metric regularity
    homotopy method
    horizontal linear complementarity problem
    mathematical program with complementarity constraints
    MPCC
    MPCC-LICQ
    MPEC
    path following
    piecewise affine system
    pseudo-Lipschitz continuity
    QPCC
    stable solution
    Opis:
    We are interested in the solution of Horizontal Linear Complementarity Problems, HLCPs, that is complementarity problems with more variables than equations. Globally metrically regular HLCPs have nonempty solution sets that are stable with respect to "right-hand-side perturbations" of the data, hence are numerically attractive. The main purpose of the paper is to show how the stability on conditioning properties of globally metrically regular HLCPs are preserved by a homotopy framework for solving the HLCP that finds a "stable" direcaion at each iteration as a local minimizer of a strongly convex quadratic program with linear complementarity constraints, QPCC. Apart from intrinsic interest in numerical solution of HLCPs, this investigation has application in solving horizontal nonlinear complementarity problems and more broadly in the area of mathematical programs with complementarity constraints, MPCCs.
    Źródło:
    Control and Cybernetics; 2002, 31, 3; 575-599
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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