347 research outputs found

    QUORUM SENSING AND SYNCHRONIZATION IN POPULATIONS OF COUPLED CHEMICAL OSCILLATORS

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    Experiments and simulations of populations of coupled chemical oscillators, consisting of catalytic particles suspended in solution, provide insights into density-dependent dynamics displayed by many cellular organisms. Gradual synchronization transitions, the “switching on” of activity above a threshold number of oscillators (quorum sensing) and the formation of synchronized groups (clusters) of oscillators have been characterized. Collective behavior is driven by the response of the oscillators to chemicals emitted into the surrounding solution

    Phase Clusters in Large Populations of Chemical Oscillators

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    Complex synchronization: Chemical oscillators communicating by exchange of intermediate species through the surrounding solution form clusters of individuals with synchronized oscillations that are out of phase with other clusters. The system evolves from unsynchronized oscillations at low number density n to four, three, two, and finally one cluster with increasing n

    Insights into collective cell behaviour from populations of coupled chemical oscillators.

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    Biological systems such as yeast show coordinated activity driven by chemical communication between cells. Here, we show how experiments with coupled chemical oscillators can provide insights into collective behaviour in cellular systems. Two methods of coupling the oscillators are described: exchange of chemical species with the surrounding solution and computer-controlled illumination of a light-sensitive catalyst. The collective behaviour observed includes synchronisation, dynamical quorum sensing (a density dependent transition to population-wide oscillations), and chimera states, where oscillators spontaneously split into coherent and incoherent groups. At the core of the different types of behaviour lies an intracellular autocatalytic signal and an intercellular communication mechanism that influences the autocatalytic growth

    KENANGA: WOMEN’S CULTURE (AN ANALYSIS OF NOVEL, A WORK OF FEMALE AUTHOR WITH PRESPECTIVE ELAINE SHOWALTER CULTURE MODEL)

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    In understanding the women’s culture, historians see and distinguish various aspects of identity, roles, relationships, attitudes and pictures of women's lives formed in the culture of society in general. Female writers also express and present the women’s culture in their works. This study discusses how the women’s culture is represented in a novel written by a woman. A work that is written with attention to the cultural elements of women that presents women's lives through experience and narration. The object analyzed in this study is Oka Rusmini's novel entitled "Kenanga" which tells the women’s lives with Balinese cultural background. Oka Rusmini, the author is also a Balinese woman. The novel is analyzed by using the approach of Subjectivity (Spivak,1994) and Elaine Showalter cultural model (Showalter,1982) especially women's writing and women's culture model. This study shows that women authors represent experiences and women's issues in their works. Women authors also write down their responses and perspectives on the patriarchal culture that surrounds their lives with a Balinese cultural setting. Oka Rusmini also conveys resistance of social and cultural constructions which make women become subordinate through the attitude and life of the characters in her novel

    The Law of Healthcare Administration

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    Healthcare leaders must navigate a complex and constantly evolving legal environment. The Law of Healthcare Administration provides a comprehensive and practical overview of healthcare law and its role in the management of healthcare organizations.The tenth edition of this classic text explores substantial shifts in the legal landscape, including the effects of the COVID pandemic, the Dobbs v. Jackson Women’s Health Organization abortion rights decision, and Biden-era legislative and regulatory developments. J. Stuart Showalter and new co-author Sallie Thieme Sanford provide a broad perspective on a wide range of healthcare justice issues, using inclusive language and incorporating examples that involve various types of healthcare providers.https://digitalcommons.law.uw.edu/faculty-books/1081/thumbnail.jp

    Home Builders Officials

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    Left to right, are, C. Allen True, Fort Worth; Kenneth J. Wilson, Oklahoma City; Russell Showalter, Oklahoma City, and Tom Caldwell of Austin. Showalter and Wilson were speakers at a meeting of home builders. Published in Fort Worth Star-Telegram morning edition April 15, 1954.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/31914/thumbnail.jp

    Vernal Chamber Dinah Mites

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    Vernal Chamber of Commerce Dinah Mites are from left, front two rows, Dwight Wetenkamp, Don Showalter, Greg Hawkins, Ted Hatch, Hal Duke, Gary Taylor, Dayle WEbb, Kenneth Aycock, Kenneth Anderton, Rita Wetenkamp, Brent Feltch, Bill Gibson, Walter Toone, and Robert Foley. Back row, Alvin Kay, Darrel Wardle, Ira Gagon, Dr. T. R. Seager, C. R. "Chuck" Henderson, Lillian Henderson, Lynne King and Jack Wallis

    Transgressive femininity: gender in the Scandinavian Modern Breakthrough

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    This PhD thesis deals with how new discourses on femininity and gender developed in Scandinavian literature during the Modern Breakthrough, 1880-1909. Political, economic and demographic changes in the Scandinavian societies put pressures on the existing, conventional gender roles, which literature reflects; however, literature also created and introduced new discourses on gender. The main focus has been on transgressive female characters in Danish, Swedish and Norwegian novels, which I have seen as indicators of emerging new forms of femininity. The study shows how the transgression of gender boundaries is used in the novels, when presenting their views on what femininity is, should be or could be. In addition to analysing the textual strategies in the representation of these ‘deviant’ literary characters, I have examined how the relevant texts were received by critics and reviewers at the time, as reviews are in themselves discursive constructs. The theoretical basis of this study has mainly been Michel Foucault’s discourse theory, Judith Butler’s theory of performativity and Yvonne Hirdman’s theory of gender binarism. I have also used concepts from several (mainly Anglo-American and Scandinavian) literary gender theorists and historians in the analyses. The four novels analysed in this study are as follows: 1) Danish author Herman Bang’s early decadence novel Haabløse Slægter (1880), where I use a queer theory perspective. 2) Norwegian author Ragnhild Jølsen’s Rikka Gan (1904), where the strong elements of pre-psychoanalysis are analysed. 3) Swedish author August Strindberg’s Le Plaidoyer d’un fou (1887-88), where I make a narratological examination of the narrative voice from a gender perspective. 4) Swedish author Annie Quiding’s Fru Fanny (1904), analysed as an example of ‘negative’ New Woman literature. The thesis shows how literature of the time represented and introduced new forms of femininity, often in the form of ambiguous female characters, and often to the disapproval of the critics. It also shows that gender discourses were much alike within Scandinavia. Furthermore, my study lays bare the skeleton of normative Breakthrough femininity, what can be called the dominant discourse on femininity at the time: a nonexisting sexual desire, feminine immobility/containment in the home and an imperative, self-sacrificing motherliness

    People, Barton family

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    Barton family of Paragonah, back row, from left: Bertha Evelyn Barton Showalter, Kenneth Evans Barton, Rachel Jane Barton Holyoak, Stephen Burris Barton, Melva Barton (Barton), Zelma Barton Robb. First row: Anita Laverne Barton McBride, William Penn Barton, Lavnia Davenport Barton, William Penn Barton Jr., Rulon Earl Barton

    Pattern formation in a ferroin-bromate system

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