14 research outputs found

    Rational Trust Modeling

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    Trust models are widely used in various computer science disciplines. The main purpose of a trust model is to continuously measure trustworthiness of a set of entities based on their behaviors. In this article, the novel notion of "rational trust modeling" is introduced by bridging trust management and game theory. Note that trust models/reputation systems have been used in game theory (e.g., repeated games) for a long time, however, game theory has not been utilized in the process of trust model construction; this is where the novelty of our approach comes from. In our proposed setting, the designer of a trust model assumes that the players who intend to utilize the model are rational/selfish, i.e., they decide to become trustworthy or untrustworthy based on the utility that they can gain. In other words, the players are incentivized (or penalized) by the model itself to act properly. The problem of trust management can be then approached by game theoretical analyses and solution concepts such as Nash equilibrium. Although rationality might be built-in in some existing trust models, we intend to formalize the notion of rational trust modeling from the designer's perspective. This approach will result in two fascinating outcomes. First of all, the designer of a trust model can incentivise trustworthiness in the first place by incorporating proper parameters into the trust function, which can be later utilized among selfish players in strategic trust-based interactions (e.g., e-commerce scenarios). Furthermore, using a rational trust model, we can prevent many well-known attacks on trust models. These two prominent properties also help us to predict behavior of the players in subsequent steps by game theoretical analyses

    Detecting imprudence of 'reliable' sellers in online auction sites

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    Reputation systems deployed in popular online auction sites simply aggregate feedback about a seller's past transactions. By studying a real auction site dataset, we infer that a non-negligible fraction of unsatisfactory transactions involve sellers with high reputation. Such a phenomenon can be interpreted by motivation theory from behaviorial science: A seller with high reputation has more business opportunities. Bad feedback for latest transactions do not immediately affect his reputation adequately to hurt business, hence he may not be as prudent as before. In this work, we propose the concept of imprudence to study and detect the inappropriate behavior of a 'reliable' seller (i.e., the one with high reputation computed using conventional approaches). Specifically, we first identify and verify the features that influence a seller's imprudence behavior. We then design a novel intelligent buying agent to combine these factors using logistic regression for predicting and studying the probability of imprudence of a target seller. We validate our approach using real datasets driven experiments

    PETIT TRIANON AND MARIE ANTOINETTE: REPRESENTATION, INTERPRETATION, PERCEPTION

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    My Dos between 2010-2014 was Professor Daniel Maudlin. I have belonged to the Faculty of Arts for this period, before transferring in the last year of completion to the Faculty of Business. I had to seek the expertise of the School of Tourism due to the interdisciplinary nature of my thesis.Images unavailable due to 3rd party copyright restrictions.This interdisciplinary thesis belongs to Marie Antoinette studies. The contemporary dissonant commodification of the controversial historical character of the last Queen of France, detected at her former home, Petit Trianon, drives the course of the thesis research. Considering the complexity and controversy of the subject, the thesis seeks to make a contribution to extant scholarship by clarifying important modern history issues through a fresh approach: by using art history as an indicator in assessing the historical truth of the narrative of Petit Trianon, the residence identified as home to the last Queen of France. The thesis examines Petit Trianon and Marie Antoinette in the context of four major narratives - the historical, cinematic, architectural and heritage narratives - relevant to the contemporary heritage interpretation of Petit Trianon as well as its visitor perceptions. In addition to sourcing evidence for the arguments originating in art history information, the thesis relies on the data collection provided by a tailor-made survey for the topic, placing the results in the wider context of a hermeneutical interpretation of data found in either history or contemporary popular culture. The array of Marie Antoinette’s images detected by the analysis charts the commodification of this historical character at Petit Trianon: its production and consumption. It is through the assessment of this commodification that the present thesis reveals the misconceptions surrounding the historical character best known as Marie Antoinette. The thesis argues that the true role of the last Queen of France was successfully obscured through juxtaposition with her perception by the French collective memory. In other words, the perception of Marie Antoinette had subverted historical truth. Furthermore, the commodification of her historical character is perpetuated in an endless chain of representations fuelled by postmodern consumerism

    Study to Support the Fitness Check of EU Consumer Law; Country Report Hungary in Study for the Fitness Check of EU Consumer and Marketing Law, Final report Part 3-Country reporting (2017)

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    Detailed report on the implementation and practical application of Directive 1999/13/EC, Directive 98/6/EC, Directive 1999/44/EC, Directive 2009/22/EC, Directive 2006/114/EC and Directive 2005/29/EC in Hungary. See http://ec.europa.eu/newsroom/just/item-detail.cfm?item_id=5933

    Eastern American Correspondents and the Othering of Mexicans in the Nineteenth-century Popular Press

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    American correspondents from distinct regions of the United States brought the cultural strains of those regions with them to areas of the West long settled by Mexicans. This dissertation demonstrates the role these distinct cultural strains played in generating stereotypical notions about Mexicans that reflected American settlers' material needs -- rooted in the doctrine of Manifest Destiny -- and conditioned correspondents to project the inverse of their core values onto Mexicans. As Mexicans from distinct regions of the Southwest were racialized and stripped of their individual distinctiveness in the white Anglo-Saxon mind, regionally specific othering that played a part in the process of Latinos' subordination merged into nationally known stereotypes that have prevailed since the turn of the twentieth century. This dissertation uses the methods of cultural history to examine the ways correspondents' religious and political beliefs, first-hand and second-hand knowledge about Mexicans, and personal trajectories combined to generate media images that othered Mexicans. This othering during the nineteenth century laid the foundations for stereotyping about Latinos in the twentieth century
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