24,605 research outputs found
Data Mining on Social Interaction Networks
No full textSocial media and social networks have already woven themselves into the very fabric of everyday life. This results in a dramatic increase of social data capturing various rela-tions between the users and their associated artifacts. In such settings, data mining and analysis plays a central role: Predictive data mining targets the acquisition and learn-ing of specific models in order to support the users, e. g., for classification or inference of parameters for future cases. Furthermore, descriptive data mining aims at obtaining patterns which summarize and characterize the data. From an application perspective, there is a variety of computational social systems – with an increasing use of mobile and ubiquitous technologies. The various direct and indirect interactions between the users in the online networks as well as the real-world human interactions using ubiquitous devices can then be represented using social interaction networks. In this article, we consider social interaction networks from a data mining perspec-tive – also with a special focus on real-world face-to-face contact networks: We com
Identifying Exceptional Descriptions of People using Topic Modeling and Subgroup Discovery (Extended Abstract, Resubmission)
No full textIdentifying Exceptional Descriptions of People using Topic Modeling and Subgroup Discovery (Extended Abstract, Resubmission)
No full textBeyond Local Nash Equilibria for Adversarial Networks
No full textSave for some special cases, current training methods for Generative Adversarial Networks (GANs) are at best guaranteed to converge to a ‘local Nash equilibrium’ (LNE). Such LNEs, however, can be arbitrarily far from an actual Nash equilibrium (NE), which implies that there are no guarantees on the quality of the found generator or classifier. This paper proposes to model GANs explicitly as finite games in mixed strategies, thereby ensuring that every LNE is an NE. We use the Parallel Nash Memory as a solution method, which is proven to monotonically converge to a resource-bounded Nash equilibrium. We empirically demonstrate that our method is less prone to typical GAN problems such as mode collapse and produces solutions that are less exploitable than those produced by GANs and MGANs
Challenge Balancing for a Kanji E-Tutoring System
No full textIn this paper, we investigate the potential of direct challenge balancing in e-tutoring, especially in domains where there are many skills to acquire. As a case study, we create an e-tutoring system for kanji. Our system estimates the perceived challenge level using both the correctness of the answers of the students and implicit feedback, and adapts accordingly. In order to make this estimation we train a classifier on labelled data collected via the same system. We show empirically that the perceived challenge can be estimated well using implicit feedback, and that the adaptive system based on challenge balancing is preferred over a system in which the student selects a difficulty setting, indicating that directchallenge balancing is a promising research direction for e-tutoring
Evolution of contacts and communities in social interaction networks of face-to-face proximity
No full textJack Alive / Martin Dead : The Location of the "Author" in Jack London\u27s Martin Eden
No full textThis essay is an attempt to read Martin Eden, Jack Londonʼs autobiographical novel, in terms of the inextricable relationship between the author and the protagonist. Critics have often taken the unbalanced plot and the lack of ironic distance between narrator and character in Martin Eden as the technical weakness of London, but this paper argues that the achievement of this novel owes a great deal to the attachment of London to Martin. The unbalanced structure is a necessary product of the severe struggle of the author to kill his romantic alter ego. // Martin, who aspires to win Ruth Morse, tries to cross class boundaries by making a career of a writer. Even after realizing the emptiness of Ruth, who turns out to be nothing but a typical figure of the bourgeoisie, he somehow persists in loving her. The notion underlying here is that, for Martin, love, career and art are fundamentally inseparable. He objects to the aestheteʼs view of Brissenden on account of his separation of art from career. Martinʼs identity and life consist only in the triunity of love/career/art; the alternative is the repudiation of life. Thus, the unnatural delay of his disappointment in love can be regarded as Londonʼs strategy to set the suicide of Martin as the necessary consequence of the story. // By finishing the story and killing Martin, London finally detaches himself from Martin, reconstructs his self, and, unlike Martin, survives as a professional writer. In this sense, Martin Eden is a story about “writerʼs self-reconstruction.
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Letter from Martin Chizzick
No full textCongratulations to Duane Pearsall for receiving the Enterpreneur of the Year award; note on the letter was written by Pearsall and it mentions that Martin, the author of the letter, died in a airplane accident
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