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    Wyświetlanie 1-13 z 13
    Tytuł:
    The LQG homing problem for a Wiener process with random infinitesimal parameters
    Autorzy:
    Lefebvre, Mario
    Moutassim, Abderrazak
    Powiązania:
    https://bibliotekanauki.pl/articles/229262.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stochastic optimal control
    first-passage time
    dynamic programming
    Brownian motion
    Opis:
    The problem of optimally controlling a Wiener process until it leaves an interval (a, b) for the first time is considered in the case when the infinitesimal parameters of the process are random. When a = -∞, the exact optimal control is derived by solving the appropriate system of differential equations, whereas a very precise approximate solution in the form of a polynomial is obtained in the two-barrier case.
    Źródło:
    Archives of Control Sciences; 2019, 29, 3; 413-422
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A boundary value problem for a non-linear difference equation
    Autorzy:
    Lefebvre, Mario
    Powiązania:
    https://bibliotekanauki.pl/articles/27324014.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    higher-order difference equations
    optimal control
    dynamic programming
    first-passage time
    homing problem
    Opis:
    A boundary value problem for a non-linear difference equation of order three is considered. We show that this equation can be interpreted as the equation satisfied by the value function in a stochastic optimal control problem. We thus obtain an expression for the solution of the non-linear difference equation that can be used to find an explicit solution to this equation. An example is presented.
    Źródło:
    Archives of Control Sciences; 2023, 33, 4; 829--837
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the mineral composition of the medium on in vitro propagation of Kohleria amabilis [Planch. et Linden] Fritsch shoots
    Wplyw zestawu soli mineralnych na namnazanie kohlerii - Kohleria amabilis [Planch. et Linden] Fritsch - in vitro
    Autorzy:
    Kozak, D
    Hetman, J
    Witek, M
    Powiązania:
    https://bibliotekanauki.pl/articles/28192.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    propagation
    in vitro
    shoot
    Kohleria amabilis
    medium
    salt composition
    mineral composition
    passage time
    Opis:
    The aim of the study was to test the influence of the mineral salt composition of the medium on in vitro multiplication and growth of kohleria shoots. Shoot tips were cultured on Murashige and Skoog (MS) (full- and half strength), Gamborg et al. (B₅), Nitsch and Nitsch (NN) or Lloyd and McCown (WPM) media supplemented with BA 1 mg·dm⁻³. The influence of passage time on the induction and growth of shoots on the medium containing half strength of MS mineral salts and BA 1 mg·dm⁻³, GA₃ 1 mg·dm⁻³ was also studied. The explants used in the experiments were obtained from aseptically grown shoot clusters. A significant influence of the medium type and the time of propagation on the number, length and weight of axillary shoots was observed. The medium containing full or half strength of mineral salts according to MS was the best. The propagation of kohleria shoots should take place at 4-week passages.
    Celem badań było określenie wpływu zestawu soli mineralnych na namnażanie i wzrost pędów Kohleria amabilis (Planch, et Linden) Fritsch. Wierzchołkowe fragmenty pędów wykładano na pożywki zawierające zestawy soli mineralnych wg: Murashige i Skoog (MS) (pełny zestaw lub ½), Gamborg i in. (B₅), Nitsch i Nitsch (NN) lub Lloyd i McCown (WPM). Pożywki uzupełniono BA 1 mg·dm⁻³. Zbadano również wpływ długości trwania pasażu na pożywce zawierającej ½ MS oraz BA 1 mg·dm⁻³ i GA₃ 1 mg·dm⁻³ na indukcję i wzrost pędów. Eksplantaty wykorzystane do doświadczeń pochodziły z ustabilizowanych kultur in vitro. Wykazano istotny wpływ rodzaju pożywki i długości trwania pasażu na liczbę, wzrost i świeżą masę nowych pędów. Najlepsze były zestawy soli mineralnych ½ MS i MS. Namnażanie pędów kohlerii powinno odbywać się w odstępach 4-tygodniowych.
    Źródło:
    Acta Agrobotanica; 2007, 60, 1
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimizing the time spent in an interval by a Wiener process with uniform jumps
    Autorzy:
    Lefebvre, Mario
    Powiązania:
    https://bibliotekanauki.pl/articles/1839133.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    Brownian motion
    Poisson process
    first-passage time
    optimal stochastic control
    integro-differential equation
    Opis:
    Let Xu(t) be a controlled Wiener process with jumps that are uniformly distributed over the interval [−c, c]. The aim is to minimize the time spent by Xu(t) in the interval [a, b]. The integro- differential equation, satisfied by the value function, is transformed into an ordinary differential equation and is solved explicitly for a particular case. The approximate solution obtained is precise when c is small.
    Źródło:
    Control and Cybernetics; 2019, 48, 3; 407-415
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A recurrence theorem for square-integrable martingales
    Autorzy:
    Alsmeyer, Gerold
    Powiązania:
    https://bibliotekanauki.pl/articles/1290203.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    martingale
    stochastic $L_2$-boundedness
    recurrence
    first passage time
    Blackwell's renewal theorem
    coupling
    Opis:
    Let $(M_n)_{n≥0}$ be a zero-mean martingale with canonical filtration $(ℱ_n)_{n≥0}$ and stochastically $L_2$-bounded increments $Y_1,Y_2,..., $ which means that $P(|Y_n| > t | ℱ_{n-1}) ≤ 1 - H(t)$ a.s. for all n ≥ 1, t > 0 and some square-integrable distribution H on [0,∞). Let $V^2 = ∑_{n≥1} E(Y_{n}^{2}|ℱ_{n-1})$. It is the main result of this paper that each such martingale is a.s. convergent on {V < ∞} and recurrent on {V = ∞}, i.e. $P(M_{n} ∈ [-c,c] i.o. | V = ∞) = 1$ for some c > 0. This generalizes a recent result by Durrett, Kesten and Lawler [4] who consider the case of only finitely many square-integrable increment distributions. As an application of our recurrence theorem, we obtain an extension of Blackwell's renewal theorem to a fairly general class of processes with independent increments and linear positive drift function.
    Źródło:
    Studia Mathematica; 1994, 110, 3; 221-234
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    To my wymyśliliśmy czas. „Ocean Without a Shore” i „Transfigurations” Billa Violi
    It is Us Who Invented Time: “Ocean Without a Shore” and “Transfigurations” by Bill Viola
    Autorzy:
    Pitrus, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/28409015.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Sztuki PAN
    Tematy:
    Bill Viola
    sztuka wideo
    przemijanie
    video art
    passage of time
    Opis:
    Artykuł zawiera interpretacje prac amerykańskiego artysty wideo Billa Violi Ocean Without a Shore i Transfigurations. W obydwu artysta wykorzystał niecodzienną technologię łączącą zapis HD, prymitywne kamery telewizji przemysłowej i techniki inscenizacyjne własnego pomysłu. Wspólnym tropem jest tu czas ukazany w wielu kontekstach. Pozornie powtarzalna forma stała się dla Violi pretekstem do rozważań o przemijaniu, śmierci, reinkarnacji. Po raz kolejny wyrafinowana technologia ujawnia swoje „ludzkie” oblicze, po raz kolejny także Bill Viola proponuje widzom zmierzenie się z erudycyjną układanką, która pod pozornie prostoduszną powierzchnią kryje wiele fascynujących odniesień – przede wszystkim do filozofii i systemów religijnych Wschodu.
    The article contains interpretations of two works of the American video artist Bill Viola: Ocean Without a Shore and Transfigurations. In both of them the artist used an unusual technique combining a HD recording, primitive CCTV recordings and his own staging techniques. The common theme is time depicted in many contexts. Seemingly repetitive form became, for Bill Viola, a pretext for reflection on transience, death and reincarnation. Once again, sophisticated technology shows its “human” face, and once again Bill Viola offers the audience the challenge of an erudite puzzle, which under an apparently artless surface hides many fascinating references, in particular to philosophy and religious systems of the East.
    Źródło:
    Kwartalnik Filmowy; 2014, 86; 161-170
    0452-9502
    2719-2725
    Pojawia się w:
    Kwartalnik Filmowy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling vessel passage speed by using passage-time in restricted areas
    Autorzy:
    Kasyk, L.
    Kijewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/135683.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    traffic speed
    vessel passage speed
    traffic time
    vessel passage time
    vessel traffic stream
    probabilistic modeling
    probabilistic distribution
    inverse random variable
    restricted areas
    fairway
    maritime transport
    Opis:
    Vessel passage speed is one of the parameters describing the vessel traffic stream on a selected waterway. Knowing the probability distribution of vessel passage speeds is essential for modeling vessel traffic streams on a waterway. This article undertakes probabilistic modeling for vessel speeds in restricted areas, where the distribution of the vessel passage time of the waterway section is known. The probabilistic procedure of the inverse random variable is used. Four different cases are considered. First, the probabilistic distribution of the vessel passage speed is given, where the vessel passage time is described by the normal distribution in certain restricted areas. The next three cases present the probabilistic distribution of vessel passage speeds on the Szczecin–Świnoujście fairway, where the vessel passage time is described by the extreme value distribution, the Frèchet distribution and the Weibull distribution.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 54 (126); 63-69
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    „Dojechałaś do końca, kochanie”. O dojrzewaniu i umieraniu teatru
    ‘You’ve reached the finish line, sweetheart.’ On the ageing and demise of theatre
    Autorzy:
    Żurawski, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/3201184.pdf
    Data publikacji:
    2023-04
    Wydawca:
    Instytut im. Jerzego Grotowskiego we Wrocławiu
    Tematy:
    theatre
    archive
    memory
    acting
    ageing / passage of time
    Grzegorzewski
    Różewicz
    Beckett
    Opis:
    Duszyczka (A Little Soul) by Tadeusz Różewicz was the penultimate production staged by Jerzy Grzegorzewski and at the same time the director’s last production, included in the repertoire of the National Theatre for seventeen years after his death. The author, a theatre historian and archivist, researcher of Grzegorzewski’s work and a multiple viewer of Duszyczka, attempts to describe the life of the play, which despite being deprived of the director’s care, nevertheless retained the shape given to it by the author to the end. He draws attention to how the aging of the performance, both in the metaphorical and quite literal sense (the physical aging of actresses and actors, the wear and tear of the stage objects) may have affected its reception. To this end, he confronts the surviving archival documentation of the performance with the personal experience of a multiple viewer. Despite the author’s declared reluctance towards this methodology, the article can be categorised as part of the current of the so-called affective archive.
    Źródło:
    Didaskalia. Gazeta Teatralna; 2023, 174; 186-202
    2720-0043
    Pojawia się w:
    Didaskalia. Gazeta Teatralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Passage of Time and Loss of Childhood in Dylan Thomas’s Fern Hill and William Wordsworth’s Ode: Intimations of Immortality
    Autorzy:
    Shabanirad, Ensieh
    Omrani, Elham
    Powiązania:
    https://bibliotekanauki.pl/articles/1191976.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dylan Thomas
    Fern Hill
    Loss of Childhood
    Ode: Intimations of Immortality
    Passage of Time
    Wordsworth
    Opis:
    Dylan Thomas (1914-1953) is one of the greatest twentieth century poets, who composed poetry in English. His passionate emotions and his personal, lyrical writing style make him be alike the Romantic poets than the poets of his era. Much of Thomas’s works were influenced by his early experiences and contacts with the natural world, especially his famous poem, Fern Hill. This paper aims to compare Thomas’s Fern Hill with Wordsworth’s Ode: Intimations of Immortality to illustrate the poets’ different attitudes towards time and childhood. In Fern Hill, Thomas’s attitude towards childhood changes from one of happiness and satisfaction to grief and loss of innocence and carefreeness. Thomas believes that Time seems like a hero to a child and allows him to be innocent and carefree; but as the child grows older and loses his childhood, he considers Time as a villain who imprisons him and does not let him enjoy life anymore and robes his childhood’s blessings and treasures. Conversely, Wordsworth in his Ode: Intimations of Immortality expressed his belief that although Time has taken his childhood creativity and imagination, but matured his thought and reason and given him insight and experience in exchange. Therefore, although Thomas and Wordsworth are both mournful at the loss of the childhood and its blessings, Wordsworth appreciates the adulthood insight, knowledge, experience, and philosophical mind. So, apparently Wordsworth’s poem is more inspiring and hopeful than Thomas’s in which he accepted being aged regretfully of his childhood, while Wordsworth’s poem enlightens the readers on how to feel happy and grateful of the rewards of adulthood.
    Źródło:
    World Scientific News; 2016, 50; 106-116
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient and stationary characteristics of a packet buffer modelled as an MAP/SM/1/b system
    Autorzy:
    Rusek, K.
    Janowski, L.
    Papir, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/330560.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    router interface
    Markovian arrival process
    semi Markov service time
    hidden Markov model
    finite buffer queue
    packet loss
    first passage time
    proces Markowiana
    model Markowa niejawny
    utrata pakietu
    Opis:
    A packet buffer limited to a fixed number of packets (regardless of their lengths) is considered. The buffer is described as a finite FIFO queuing system fed by a Markovian Arrival Process (MAP) with service times forming a Semi-Markov (SM) process (MAP/SM/1/b in Kendall’s notation). Such assumptions allow us to obtain new analytical results for the queuing characteristics of the buffer. In the paper, the following are considered: the time to fill the buffer, the local loss intensity, the loss ratio, and the total number of losses in a given time interval. Predictions of the proposed model are much closer to the trace-driven simulation results compared with the prediction of the MAP/G/1/b model.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 429-442
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Artistes/copistes
    Autorzy:
    Borrel, Pascale
    Powiązania:
    https://bibliotekanauki.pl/articles/487698.pdf
    Data publikacji:
    2015-11-05
    Wydawca:
    Akademia Sztuk Pięknych im. Eugeniusza Gepperta we Wrocławiu
    Tematy:
    ARTIST, TEXT, COPY, OPERATION AND WRITING AND, REWRITING, THE PASSAGE OF TIME, ART
    ARTYSTA, TEKST, KOPIOWANIE, PISANIE I PRZEPISYWANIE, UPŁYW CZASU, SZTUKA
    Opis:
    ARTIST – COPYIST Simon Hantai, Allen Ruppersberg, Bruno Di Rosa, Gérard Collin-Thiébaut, Sherrie Levine copied the Bible, philosophical and literary texts, (Walden, Henry David Thoreau, Flaubert’s Madame Bovary, Journal Amiel ...). Following existing texts, these artists work looks like ‘banal, humble and mindless’ copyist work. Although in some cases copying is part of the painting – as in Peinture (Écriture rose) by Simon Hantai – produced mostly with a ballpoint pen on plain paper – as if the artists wanted to emphasize the trivial, time-consuming and monotonous nature of his/her effort and evoke the atmosphere of the school classroom of distant times. Allen Ruppersberg and Bruno Di Rosa indeed refer to school experience, when they declare that rewriting allowed them to ‘learn how to write’, just as copying masters allow beginners to learn to paint. But while copying allows us to establish organic relationship with the text, then the process of copying the text is not about maintaining certain tradition: it is rather about the role that language plays in the field of visual arts starting from the sixties. It contributes to the revaluation of values usually connected with art-pieces, such as originality, expression of subjectivity, etc. In numerous comments provoked by the copyist who appears in literature (Bouvard et Pécuchet, Bartleby ...), there is a subversive nature of this labor-intensive and mechanical actions – when it is practiced in art. Copying is a long-term job; successive lines of letters fill the pages of notebooks, creating a ‘full-bodied’ art-piece in the literal sense of the word. The quantitative aspect is carried out in various ways. If the point is to visualize the copy of an entire novel, and in order to embed the importance of work for systematic and ‘mandatory’ implementation, or in order to reach make more opportunity than necessity – copying allows us to experience the passage of time: the time that is spent on this completely anachronistic act ; time spent without any justification.
    Źródło:
    DYSKURS: Pismo Naukowo-Artystyczne ASP we Wrocławiu; 2015, 20; 92-107
    1733-1528
    Pojawia się w:
    DYSKURS: Pismo Naukowo-Artystyczne ASP we Wrocławiu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feeling and Time: The Experience of Passage and its Relation to Meaning
    Autorzy:
    August III, John W.
    Powiązania:
    https://bibliotekanauki.pl/articles/451527.pdf
    Data publikacji:
    2018-12-28
    Wydawca:
    Uniwersytet Warszawski. Wydział Filozofii
    Tematy:
    time
    temporality
    duration
    feeling
    passage
    meaning
    experience
    Opis:
    This essay notes the relationship between meaning and the felt passage of time. The concrete experience of fluctuations in the rapidity of passage seems to be universal to the human condition. We often associate the rapid passage of time with pleasure. This article shows that this commonly held view of passage is mistaken and that the more fundamental relationship between transformations of passage is found in fluctuations of meaning. Through explorations of boredom, ambition, and concern, this essay illustrates this connection between passage and meaning through an analysis of these feelings on what the author calls “the axis of fluidity,” a theoretical construction utilized to measure the experience of passage. The result of this essay is an assertion that fluctuations in the saturation of experience with meaning influences the feeling of passage. At the end of the work, an unresolved problem appears, and a potentially ameliorating hypothesis is offered.
    Źródło:
    Eidos. A Journal for Philosophy of Culture; 2018, 2, 4(6); 82-92
    2544-302X
    Pojawia się w:
    Eidos. A Journal for Philosophy of Culture
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The foundations of a poetic dialogue: Leopold Staff and Ryszard Krynicki
    Podstawa poetyckiej rozmowy: Leopold Staff i Ryszard Krynicki
    Autorzy:
    Misiak, Iwona
    Powiązania:
    https://bibliotekanauki.pl/articles/2088445.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Polish literature of the 20th century
    avant-garde poets
    the dialogic relationship
    new materialism
    postphenomenology
    plasticity
    transformation masks
    alterations in the passage of time
    Delphic maxims
    Leopold Staff (1878–1957)
    Ryszard Krynicki (b. 1943)
    plastyczność
    maska transformacyjna
    sentencje delfickie
    przemiany czasu i podmiotowości
    Opis:
    This article brings together two authors/two poems and makes them enter into an intertextual dialogue that involves the discourses of the new materialism (Catherine Malabou), postphenomenology (Natalie Depraz and Marc Richir) and Delphic maxims. Concepts like plasticity, transformation masks, alterations in the passage of time (chronos, kairos, aeon), subjectivity, emotional excess, and the living body are used to establish the foundations a poetic conversation, which, for all one knows, may be fortuitous or in a way preordained.
    Źródło:
    Ruch Literacki; 2019, 2; 237-248
    0035-9602
    Pojawia się w:
    Ruch Literacki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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