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    Wyświetlanie 1-4 z 4
    Tytuł:
    Steganographic algorithm of hiding information in sound based on Fourier transform and masking
    Autorzy:
    Kozieł, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/206286.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    keywords steganography
    hidden communication
    Fourier transform
    Opis:
    A new steganographicmethod based on Fourier transform is proposed. Data is attached in the frequency domain within the limits of the audible band. Masked frequencies are used to conceal information in order to make the changes inaudible for human ear. This approach allows for modification in the sound frequency band only, and does not require any additional modifications. It also allows for concealing information efficiently, minimizing the number of changes and gaining robustness with respect to popular sound transformations.
    Źródło:
    Control and Cybernetics; 2011, 40, 4; 1231-1247
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Peculiarities of use of speech acoustic environment while embedding into it of hidden message codes
    Autorzy:
    Korostil, Y.
    Afanasyeva, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/360624.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    communication channel
    model
    message
    hidden message
    acoustic message
    Opis:
    The problems of embedding of message codes into Acoustic environment of speech are researched. The peculiarities of speech perception by human hearing are analyzed. As an example of acoustic Messager environment and codes of hidden messages embedded into it is reviewed a channel of mobile Communications in the part of transformations which are implemented with acoustic signals. Approach to build a model of process of transmission of speech via non-linear channel basing on imagination about speech signals spectrum is developed. The proposals on methods of use of such models for analysis and interpretation of distortions of signals made by transformations, implemented in example channel are presented.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 33 (105); 46-50
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Animal mimicry for covert communication with arbitrary output distribution: beyond the assumption of ignorance
    Autorzy:
    Zuber, Krzysztof Władysław
    Opieliński, Krzysztof J.
    Powiązania:
    https://bibliotekanauki.pl/articles/128063.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    animal mimicry
    covert communication
    hidden Markov model
    mimikra zwierzęca
    komunikacja ukryta
    ukryty model Markowa
    Opis:
    The paper describes a new method of embedding human communication in acoustic sequences mimicking animal communication. This is done to ensure a low probability of detection (LPD) transfer of covert messages. The proposed scheme mimics not only individual sounds, but also the imitated species’ communication structure. This paper presents a step forward in animal communication mimicry - from pure vocal imitation without regard for the plausibility of communication’s structure, through Zipf’s law-preserving scheme, to the mimicry of a known communication structure. Unlike previous methods, the updated scheme does not rely on third parties’ ignorance of the imitated species’ communication structure beyond Zipf’s law - instead, the new method enables one to encode information in a known zeroth-order Markov model. The paper describes a method of encoding an arbitrary message in a syntactically plausible, species-specific sequence of animal sounds through evolutionary means. A comparison with the previous iteration of the method is also presented.
    Źródło:
    Vibrations in Physical Systems; 2019, 30, 1; 1-8
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Czynniki społeczne w genezie nieprawidłowego rozwoju i zachowania
    Social factors in the genesis of an impaired development and behaviour
    Autorzy:
    Siwek, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/2139682.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    social environment: family – school – contemporaries
    characteristics and typology of family systems
    developmental and behavioral disorders – pathological mechanism of disorders – localization: personality traits and parental attitudes
    interpersonal relations–collusion relationships
    communication systems
    hidden loyalty
    delegation to roles
    Opis:
    The paper deals with the impact of the social background for developmental disorders, searching for unfavorable factors in the three most important surroundings – family, school, contemporary group. Hence the analysis was made with signs of improper interpersonal relations and life conditions encroaching on mental balance that can be found in social agencies (school, family), responsible for personal development and behavior. Basing upon selected theoretical works and my diagnostic and therapeutic experience, various negative effects on personal development were illustrated, given the ill-adapted familial and educational systems, as well as informal roles played in contemporary groups. The paper got its material focused on the familial environment where personality traits and parental attitudes, ways of communication and pathological mechanisms permanently generate factors that appear unfavorable for personal social development (toxic messages, enforced loyalty, role delegation,collusion relationships). A particular emphasis was put on the role of social factors in the origins of both primary and secondary disorders, and on the fact that signs of difficulties and disorders a youngster meets may be an indirect reaction to factors infringing on his/her psychological balance or else – actualized belatedly when assuming new social roles.
    Źródło:
    Acta Universitatis Lodziensis. Folia Psychologica; 2010, 14; 19-43
    2353-4842
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Psychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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