900 resultados para 280110 Systems Theory
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Proceedings of the 12th Conference on Dynamical Systems -Theory and Applications
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Proceedings of the 10th Conference on Dynamical Systems Theory and Applications
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Proceedings of the 10th Conference on Dynamical Systems Theory and Applications
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Fractional Calculus (FC) goes back to the beginning of the theory of differential calculus. Nevertheless, the application of FC just emerged in the last two decades. In the field of dynamical systems theory some work has been carried out but the proposed models and algorithms are still in a preliminary stage of establishment. Having these ideas in mind, the paper discusses a FC perspective in the study of the dynamics and control of mechanical systems.
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Refering to systems theory, we identify a supraindividual property in interactions between therapist and couple. We use gaze directions to describe the partners' behaviors and label this property the "mutual attending frame." We propose a procedure to observe triadic interactions in a consultation setting and a method to measure mutual attending. The method is illustrated by the data analysis of two triads contrasted on measures of therapeutic alliance. We discuss the potential of this method for the description of the interactive aspects of the therapeutic alliance.
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Advancements in high-throughput technologies to measure increasingly complex biological phenomena at the genomic level are rapidly changing the face of biological research from the single-gene single-protein experimental approach to studying the behavior of a gene in the context of the entire genome (and proteome). This shift in research methodologies has resulted in a new field of network biology that deals with modeling cellular behavior in terms of network structures such as signaling pathways and gene regulatory networks. In these networks, different biological entities such as genes, proteins, and metabolites interact with each other, giving rise to a dynamical system. Even though there exists a mature field of dynamical systems theory to model such network structures, some technical challenges are unique to biology such as the inability to measure precise kinetic information on gene-gene or gene-protein interactions and the need to model increasingly large networks comprising thousands of nodes. These challenges have renewed interest in developing new computational techniques for modeling complex biological systems. This chapter presents a modeling framework based on Boolean algebra and finite-state machines that are reminiscent of the approach used for digital circuit synthesis and simulation in the field of very-large-scale integration (VLSI). The proposed formalism enables a common mathematical framework to develop computational techniques for modeling different aspects of the regulatory networks such as steady-state behavior, stochasticity, and gene perturbation experiments.
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This paper describes the fluctuations of temporal criteria dynamics in the context of professional sport. Specifically, we try to verify the underlying deterministic patterns in the outcomes of professional basketball players. We use a longitudinal approach based on the analysis of the outcomes of 94 basketball players over ten years, covering practically players" entire career development. Time series were analyzed with techniques derived from nonlinear dynamical systems theory. These techniques analyze the underlying patterns in outcomes without previous shape assumptions (linear or nonlinear). These techniques are capable of detecting an intermediate situation between randomness and determinism, called chaos. So they are very useful for the study of dynamic criteria in organizations. We have found most players (88.30%) have a deterministic pattern in their outcomes, and most cases are chaotic (81.92%). Players with chaotic patterns have higher outcomes than players with linear patterns. Moreover, players with power forward and center positions achieve better results than other players. The high number of chaotic patterns found suggests caution when appraising individual outcomes, when coaches try to find the appropriate combination of players to design a competitive team, and other personnel decisions. Management efforts must be made to assume this uncertainty.
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Differences in dimensionality of electroencephalogram during awake and deeper sleep stages. The nonlinear dynamical systems theory provides some tools for the analysis of electroencephalogram (EEG) at different sleep stages. Its use could allow the automatic monitoring of the states of the sleep and it would also contribute an explanatory level of the differences between stages. The goal of the present paper is to address this type of analysis, focusing on the most different stages. Estimations of dimensionality were compared when six subjects were awake and in a deep sleep stage. Greater dimensionality involves more complexity because the system receives more external influences. If this dimensionality is maximum, we can consider that the time series is a noisy one. A smaller dimensionality involves lower complexity because the system receives fewer inputs. We hypothesized that we would find greater dimensionality when subjects were awake than in a deep sleep stage. Results show a noisy time series during the awake stage, whereas in the sleep stage, dimensionality is smaller, confirming our hypothesis. This result is similar to the findings reached previously by other authors.
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As a result of the growing interest in studying employee well-being as a complex process that portrays high levels of within-individual variability and evolves over time, this present study considers the experience of flow in the workplace from a nonlinear dynamical systems approach. Our goal is to offer new ways to move the study of employee well-being beyond linear approaches. With nonlinear dynamical systems theory as the backdrop, we conducted a longitudinal study using the experience sampling method and qualitative semi-structured interviews for data collection; 6981 registers of data were collected from a sample of 60 employees. The obtained time series were analyzed using various techniques derived from the nonlinear dynamical systems theory (i.e., recurrence analysis and surrogate data) and multiple correspondence analyses. The results revealed the following: 1) flow in the workplace presents a high degree of within-individual variability; this variability is characterized as chaotic for most of the cases (75%); 2) high levels of flow are associated with chaos; and 3) different dimensions of the flow experience (e.g., merging of action and awareness) as well as individual (e.g., age) and job characteristics (e.g., job tenure) are associated with the emergence of different dynamic patterns (chaotic, linear and random).
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Tutkimuksessa tarkastellaan vaikutusperusteisuuteen pohjautuvia uusia sotataitoa soveltavia konsepteja kuvaavia käsitteitä ja niiden sisältöä. Tutkimuksessa tuodaan myös esiin sellaisia syitä ja tekijöitä, jotka ovat johtaneet tai mahdollistaneet uusien konseptien synnyn ja kehittämisen. Asioita tarkastellaan nimenomaan vaikutusperusteisuuden näkökulmasta. Tarkastelun kohteena olevat käsitteet ovat EBO (Effect Based Operations), EBAO (Effect Based Approach to Operations), SOD (Systemic Operational Design) ja kokonaisvaltainen lähestymistapa, CA (Comprehensive Approach). Työn keskeisinä johtopäätöksinä esitetään seuraavat tutkimustulokset: Asevoimiin kohdistuneet rakenteelliset muutokset ovat johtaneet länsimaisissa asevoimissa joukkojen supistamiseen sekä uuden tyyppisen teknologisen toimintakyvyn ja toimintatapamallien luomiseen. Verkostokeskeinen sodankäynti ja erityisesti sen mahdollistama yhteinen tilannekuva toimivat vaikutusperusteisten konseptien mahdollistajana ja niiden ydinprosessien tukena erityisesti, kun asiaa tarkastellaan teknologiselta kannalta. Verkostosodankäynti, kuten nykypäivän talo-uselämäkin, nojaa nopeaan päätöksentekoon, kustannusten minimointiin ja teknologian luomiin mahdollisuuksiin verkottuneessa maailmassa. Taloudellisuusajattelu, tuhovaikutusten minimoinnit, omien tappioiden välttäminen ja niin edelleen, toistuvat eri yhteyksissä uusilla termeillä. Yhteinen nimittäjä on kustannustehokkuus. Mikään ei ole kuitenkaan perustavasti muuttunut. Kaikki se, mitä sodankäynti on ja on ollut, tulee säilymään.
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Pro Gradu -tutkimuksen keskeisin tavoite on ollut selvittää minkälaisia haasteita organisaatiot kohtaavat kehittäessään toimintojaan. Kontekstina tutkimuksessa on toiminut institutionalisoituminen, jolla viitataan toimintojen virallistamiseen. Tutkimus toteutettiin laadullisena ja aineistonkeräystapana käytettiin puolistrukturoituja haastatteluja. Tutkimuksen haastatteluiden kautta päästiin tutkimaan suomalaisten kuntasektoritoimijoiden muutosprosessien haasteellisuutta. Tutkimustulokset osoittivat, että haasteet organisaatiomuutosten aikana ovat hyvin moninaisia. Muutoshaasteet ovat kuitenkin luonteeltaan sellaisia, että ne voidaan kohdata keinoina muutoksen parempaan läpivientiin. Erityisesti työntekijöiden huomioiminen osana muutosprosessia korostui tämän tutkimuksen osana. Myös sosioteknisen systeemiajattelun rooli korostui oivana keinona kohdata muutoshaasteet.
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Pro Gradu- tutkimuksen keskeisin tavoite on ollut selvittää, kuinka sosioteknistä kuilua kohdeyrityksen toiminnanohjausjärjestelmän ja käyttäjien välillä voitaisiin pienentää. Teo-reettisena viitekehyksenä on käytetty sosioteknistä systeemiteoriaa sekä teorioita liittyen tietoteknisen järjestelmän hyväksyntään. Toiminnanohjausjärjestelmät ovat tunnetusti välttämätön osa nykypäivää lähes kaikille yrityksille. Niiden käyttöönoton onnistumista ja käytön tehokkuutta voidaan parantaa huomioimalla sekä sosiaalinen että tekninen systeemi organisaatiossa. Sosiotekninen kuilu rakentuu kahden välttämättömän ja toisistaan riippuvaisen systeemin välille: sekä sosiaalinen systeemi eli henkilöstö ja heidän työtapansa että tekninen systeemi eli tekno-logia ja tieto on huomioitava ja aidosti sosioteknisessä muutoksessa molempia systeeme-jä muokattava. Organisaatio voi parantaa omilla toimillaan käyttäjien asennetta ja haluk-kuutta ja siten kaventaa kuilua sosiaalisen systeemin puolelta. Lisäksi teknistä systeemiä tulisi muokata paremmin vastaamaan käyttäjien toiveita, jotta kuilu kapenisi myös tekni-sen systeemin suunnasta. Tutkimus toteutettiin laadullisena ja aineistonkeräystapana käytettiin puolistrukturoituja haastatteluja kohdeyrityksessä.
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Introduction Fundamental to the philosophy of Buddhism, is the insight that there is "unsatisfactohness" (dukkha) in the world and that it can be eliminated through the practice of the Noble Eight Fold Path. Buddhism also maintains that the world as we experience and entities that exist are bereft of any substantiality. Instead existence is manifest through dependent origination. All things are conditional; nothing is permanent. However, inherent in this dependent existence is the interconnectedness of all beings and their subjection to the cosmic law of karma. Part of cultivating the Eight Fold path includes a deep compassion for all other living things, 'trapped' within this cycle of dependent origination. This compassion or empathy (karuna) is crucial to the Buddhist path to enlightenment. It is this emphasis on karuna that shows itself in Mahayana Buddhism with respect to the theory of the boddhisatva (or Buddha-to-be) since the boddhisatva willingly postpones his/her own enlightenment to help others on the same path. One of the ramifications of the theory of dependent origination is that there is no anthropocentric bias placed on humans over the natural world. Paradoxically the doctrine of non-self becomes an ontology within Buddhism, culminating in the Mayahana realization that a common boundary exists between samsara and nirvana. Essential to this ontology is the life of dharma or a moral life. Ethics is not separated from ontology. As my thesis will show, this basic outlook of Buddhism has implications toward our understanding of the Buddhist world-view with respect to the current human predicament concerning the environment. While humans are the only ones who can 4 attain "Buddhahood", it is because of our ability to understand what it means to follow the Eight fold path and act accordingly. Because of the interconnectedness of all entities {dharmas), there is an ontological necessity to eliminate suffering and 'save the earth' because if we allow the earth to suffer, we ALL suffer. This can be understood as an ethical outlook which can be applied to our interaction with and treatment of the natural environment or environment in the broadest sense, not just trees plants rocks etc. It is an approach to samsara and all within it. It has been argued that there is no ontology in Buddhism due to its doctrine of "non-self". However, it is a goal of this thesis to argue that there does exist an original ontology in Buddhism; that according to it, the nature of Being is essentially neither "Being nor non-being nor not non-being" as illustrated by Nagarjuna. Within this ontology is engrained an ethic or 'right path' (samma marga) that is fundamental to our being and this includes a compassionate relationship to our environment. In this dissertation I endeavour to trace the implications that the Buddhist worldview has for the environmental issues that assail us in our age of technology. I will explore questions such as: can the Buddhist way of thinking help us comprehend and possibly resolve the environmental problems of our day and age? Are there any current environmental theories which are comparable to or share common ground with the classical Buddhist doctrines? I will elucidate some fundamental doctrines of early Buddhism from an environmental perspective as well as identify some comparable modern environmental theories such as deep ecology and general systems theory, that seem to share in the wisdom of classical Buddhism and have much to gain from a deeper appreciation of Buddhism.