4,230 research outputs found

    A Methodology for Discovering how to Adaptively Personalize to Users using Experimental Comparisons

    Full text link
    We explain and provide examples of a formalism that supports the methodology of discovering how to adapt and personalize technology by combining randomized experiments with variables associated with user models. We characterize a formal relationship between the use of technology to conduct A/B experiments and use of technology for adaptive personalization. The MOOClet Formalism [11] captures the equivalence between experimentation and personalization in its conceptualization of modular components of a technology. This motivates a unified software design pattern that enables technology components that can be compared in an experiment to also be adapted based on contextual data, or personalized based on user characteristics. With the aid of a concrete use case, we illustrate the potential of the MOOClet formalism for a methodology that uses randomized experiments of alternative micro-designs to discover how to adapt technology based on user characteristics, and then dynamically implements these personalized improvements in real time

    Self-interest and Altruism: Pluralism as a Basis for Leadership in Business

    Get PDF
    The paper outlines the case for pluralism between self-interest (egoism) and altruism in business leadership. Scientific progression demonstrating pluralism is discussed, providing a multidisciplinary view of pluralism from evolutionary biology, psychology, moral philosophy, economic theory and organisational behavior. Findings show that myopic views of self-interest and altruism were once dominant in a number of fields however shifts in contemporary theory have provided a basis for pluralism in business leadership. Pluralism is yet to find grounding in leadership ethics, which still widely views “good leadership” through the lens of altruistic orientations. For leaders in business, the relevance of both self-interest and altruistic orientations are described. The paper seeks to address the divide between self-interest and altruism for business leaders, advocating for a realistic and pragmatic pluralistic approach to guide future research

    Subversive, mother, killjoy: Sexism against dilma rousseff and the social imaginary of Brazil’s rightward turn

    Get PDF
    From resistance fighter against Brazil’s military dictatorship to its first female president, Dilma Rousseff’s biography follows the historic arc of democratization in Brazil. Her 2016 impeachment was also the culminating event of numerous crises that polarized Brazilian society. To supporters, Rousseff’s removal without evidence constitutes an abrogation of democracy. To critics, Rousseff had to answer for an economic recession and widespread corruption (though she was not implicated in any investigation). This article examines the social imaginaries of the rightward turn that made Rousseff’s removal possible. Moving across diverse sets of public culture-street protests, journalistic accounts, political observations, and Rousseff’s speeches-the article uses sexism against Rousseff as an analytic to deconstruct the cultural narratives of Brazil’s rightward turn. A first section considers conservative efforts to paint Rousseff as a political subversive. These accusations drew on long-standing, right-wing Brazilian tropes around people who don’t “act right” in the moral, sexual, and ideological fields. A second section reads the maternal metaphors of Rousseff’s governance strategies against conflicting political renderings of the family-pitting left-wing versions of family rooted in economic development against Evangelical Christian accounts of the family as a gender-normative unit. A third section argues that Rousseff’s response to the charges against her turned her (and those who argued her case) into what Sara Ahmed calls “feminist killjoys.” Ultimately, the question of sexism in Rousseff’s impeachment shows how deep-seated cultural conservatisms can be activated in a new era of democratic uncertainty

    Rust Craft Publishers: a case study in public relations.

    Full text link
    Thesis (M.S.)--Boston Universit

    The pathological relationship between the host and parasite in varieties and strains of watermelons resistant to Fusarium Niveum E. F. S.

    Get PDF
    Watermelon plants, at all stages of growth, are liable to attack by Fusarium niveum which enters through the root tips and ruptures formed by newly developed lateral roots. Epidermal cells of the zones of elongation and maturation at the side of the root 2 to 6 mm. back of the zone of meristematic activity were as readily penetrated as meristematic tissues at the tip. After penetrating the epidermis, hyphae continued intracellularly through the cortical cells to the pericycle where the massed mycelium broke down the endodermal cell walls and entered the xylem vessels. Entrance of the pathogene through the ruptures formed by lateral roots was accompanied by the formation of lesions, intracellular penetration of the cortical and parenchymatous tissues, and disorganization of the endodermis by the action of massed hyphae, which then entered the xylem vessels. Infection of seedlings at or shortly after germination of the seed, combined with favorable conditions for the pathogene led to rapid invasion of the xylem vessels with mycelium in the primary root, accompanied by a high percentage of wilting. Older plants, repeatedly infected through young lateral roots, apparently succumbed from a series of internal pathological disturbances involving the accumulation of gum-like materials, tyloses and mycelium in the xylem vessels, particularly those of the primary root where the conductive capacity of the vessels was so reduced in time that wilting ensued. Gum-like materials and tyloses in the xylem of diseased plants seem to be produced by living cells of the host, injured by either toxic, metabolic or enzymatic products of the wilt pathogene. Older resistant plants seemingly withstood attacks of the wilt pathogene, which in seedlings often proved fatal. Apparently no well developed defense mechanism had time to develop and function in the early seedling stage. It was significant that resistant plants, which survived in fields heavily infested with Fusarium niveum had bands of gum-like material surrounding the older xylem near the center of the root axis, while the secondary xylem at the periphery of the stele remained unaffected. On the other hand, wilted susceptible plants were filled with gum-like materials throughout the primary root xylem. Neither resistant nor susceptible plants, grown in soils free of the wilt pathogene, had appreciable quantities of gum-like materials and tyloses in the primary root xylem. Greenhouse indexing of resistant seedlings has proved of value in the Iowa Belle and Pride of Muscatine varieties, but, with the dosage of inoculum employed, Iowa King selections failed to show measurable diffcrences in resistance when compared with susceptible checks. In 4 years, field studies on soils heavily infested with the wilt pathogene, resistant plants seemed more resistant with age, the heaviest mortality being within the first 16 to 24 days, after which few plants wilted; susceptible checks continued to wilt throughout the season. Changes in air and soil temperatures and precipitation retarded or accelerated wilting for periods of 1 to several days; however, irrespective of environmental factors, there was an upward trend in the percentage average daily wilt, which reached a maximum at 23 to 39 days after planting susceptible seedlings and at 16 to 24 days with resistant seedlings. Pride of Muscatine, Iowa King and Iowa Belle have proved to be suitable stock for the transmission of resistance. the last named variety being especially desirable as a resistant parent. Backcrossing the F1 hybrid (resistant x susceptible variety) to the resistant parent has proved the most effective method of building up resistance when susceptible and resistant lines were involved
    • …
    corecore