R. Albert

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There is a large and rapidly increasing literature which analyses social networks for which substantial amounts of quantitative data are available. Further, there is a growing and related literature on what is referred to by economists as 'information cascades' on such networks. In this paper, we describe the process of emergence and evolution of a(More)
Understanding the syntactic structure of a sentence is a necessary preliminary to understanding its semantics and therefore for many practical applications. The field of natural language processing has achieved a high degree of accuracy in parsing, at least in English. However, the syntactic structures produced by the most commonly used parsers are less(More)
The author hereby grants to M.I.T. permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole and in part in any medium now known or hereafter created. Abstract Online education is a rapidly growing field and with the desire to create more online educational content comes the necessity to be able to(More)
TaleBlazer is a platform for creating and playing location-based augmented-reality games. The TaleBlazer web-based editor allows users to build customized games using a blocks-based programming language. In order to allow more user groups to utilize various features offered by TaleBlazer, building an intuitive editor user interface is especially essential(More)
The author hereby grants to M.I.T. permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole and in part in any medium now known or hereafter created. Abstract SASY (Scalable and Adjustable SYmbolic) Planner is a flexible symbolic planner which searches for a satisfying plan to a partially observable(More)
The author hereby grants to M.I.T. permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole and in part in any medium now known or hereafter created. ABSTRACT The systemic structure of TCP/IP is outdated; a new scheme for data transportation is needed in order to make the internet more adaptive to(More)
Basketball is a team game, and an important task for coaches is analyzing the effectiveness of various offensive plays. Currently, teams spend a great deal of time examining video of past games. If teams could automatically classify plays, they could more effectively analyze their own plays and scout their opponents. In this thesis, we develop a methodology(More)
The author hereby grants to M.I.T. permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole and in part in any medium now known or hereafter created. Abstract Research on lower extremity prostheses has primarily focused on activities of daily living, such as walking and running, but has largely(More)