6,836 research outputs found

    Comparing Community Structure to Characteristics in Online Collegiate Social Networks

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    We study the structure of social networks of students by examining the graphs of Facebook "friendships" at five American universities at a single point in time. We investigate each single-institution network's community structure and employ graphical and quantitative tools, including standardized pair-counting methods, to measure the correlations between the network communities and a set of self-identified user characteristics (residence, class year, major, and high school). We review the basic properties and statistics of the pair-counting indices employed and recall, in simplified notation, a useful analytical formula for the z-score of the Rand coefficient. Our study illustrates how to examine different instances of social networks constructed in similar environments, emphasizes the array of social forces that combine to form "communities," and leads to comparative observations about online social lives that can be used to infer comparisons about offline social structures. In our illustration of this methodology, we calculate the relative contributions of different characteristics to the community structure of individual universities and subsequently compare these relative contributions at different universities, measuring for example the importance of common high school affiliation to large state universities and the varying degrees of influence common major can have on the social structure at different universities. The heterogeneity of communities that we observe indicates that these networks typically have multiple organizing factors rather than a single dominant one.Comment: Version 3 (17 pages, 5 multi-part figures), accepted in SIAM Revie

    Custom Integrated Circuits

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    Contains reports on seven research projects.U.S. Air Force - Office of Scientific Research (Contract F49620-84-C-0004)National Science Foundation (Grant ECS81-18160)Defense Advanced Research Projects Agency (Contract NOO14-80-C-0622)National Science Foundation (Grant ECS83-10941

    THE 4DILAN PROJECT (4TH DIMENSION IN LANDSCAPE AND ARTIFACTS ANALYSES)

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    The project is part of the wider application and subsequent spread of innovative digital technologies involving robotic systems. Modern society needs knowledge and investigation of the environment and of the related built landscape; therefore it increasingly requires new types of information. The goal can be achieved through the innovative integration of methods to set new analysis strategies for the knowledge of the built heritage and cultural landscape. The experimental cooperation between different disciplines and the related tools and techniques, which this work suggests for the analysis of the architectural heritage and the historical territory, are the following: - 3D metric survey techniques with active and passive sensors - the latter operating in both terrestrial mode and by aerial point of view. In some circumstances, beyond the use of terrestrial LiDAR, even the newest mobile mapping system using SLAM technology (simultaneous localization and mapping) has been tested. - Techniques of non-destructive investigation, such as geophysical analysis of the subsoil and built structures, in particular GPR (Ground Penetrating Radar) techniques. - Historic and stratigraphic surveys carried out primarily through the study and interpretation of documentary sources, cartography and historical iconography, closely related to the existing data or latent material. The experience through the application of these techniques of investigation connected to the built spaces and to the manmade environments has been achieved with the aim of improving the ability to analyse the occurred transformations/layers over time and no longer directly readable or interpretable on manufactured evidence

    MULTI-SCALAR SURVEYS FOR COMPLEX ARCHITECTURES

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    Abstract. This study is part of a much wider project in which professors and researchers from the University of Naples Federico II and the University of Campania Luigi Vanvitelli are collaborating in different subject areas. The object of study is the ancient Sanctuary of Montevergine characterized by a long history of transformations and stratifications. Driven by the desire to fill a singular gap, linked to the lack of a systematic and comprehensive study of a complex whose first settlement dates back to the early 12th century, various studies have been started relating to the historical, artistic and architectural aspects.Various surveying techniques and methods had to be used due to its architectural, compositional and settlement characteristics. Integrated 3D surveying technologies were used for both the cognitive studies of the entire complex as well as for investigating and detecting the elements at different scales, ranging from the architectural to the detailed ones

    The post office experience: designing a large asynchronous chip

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    Journal ArticleThe Post Office is an asynchronous, 300,000 transistor, full-custom CMOS chip designed as the communication component for the Mayfly scalable parallel processor. Performance requirements led to the development of a design style which permits the design of sequential circuits operating under a restricted form of multiple input change sign alling called burst-mode. The Post Office complexity forced us to develop a set of design fools capable of correctly synthesizing transistor circuits front state machine and equation specifications, and capable of verifying the correctness of the resultant circuity using implementation specific timing assumptions. The paper provides a case study of this design experience

    The ways to Superga. History and Design Studio projects for year 2012-2013

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    The e-book, specifically imaginated for foreign students, presents a selection of essays by the "History and Design Studio" teachers and collaborators to underline methodologically the relevance of the historical approach to the design. The specificity of the imposant baroque architecture of Superga Church, at the top of Torino Hills (the so called "Montagne de Turin" by ancient cartography) is related to the contest and to the city. Design proposals and solutions, equally are strongly connected to the landscape analysis. The book then proposes the students answer to these complex topics by a series of "atlas" interpretations and design suggestions. The deep analysis on cultural components, architectural monuments and urban organization is surely the main force of these projects in which the few projected solutions are able to dialogue truly with the contest. The presentations by the Course director and by the resposable of the lanscape administration (Parco del Po e della collina torinese) show the importante of the cooperation between associations and university to propose solutions able to dialogue with the complexity of nowadays cultural contest. With contributions by Fulvio Capurso, Maria Vittoria Cattaneo, Vittorio Defabiani, Luca Malvicino, Rachele Vicario and presentations by the Director of Studies and Superga Park responsible and collaborato

    THE 4DILAN PROJECT (4TH DIMENSION IN LANDSCAPE AND ARTIFACTS ANALYSES)

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    Aspects of User Experience in Augmented Reality

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