Martin Röscheisen

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People keep pieces of information in diverse collections such as folders, hotlists, e-mail inboxes, newsgroups, and mailing lists. These collections mediate various types of collaborations including communicating, structuring, sharing information, and organizing people. Grassroots is a system that provides a uniform framework to support peopleÕs(More)
We introduce a framework for access/action control which shifts the emphasis from the participants to their relationships. The framework is based on a communication model in which participants negotiate the mutually agreed-upon boundary conditions of their relationships, and create social reference points by encapsulating them in compact "communication(More)
We describe the interaction design for a set of facilities that enable users of an augmented version of the NCSA Mosaic browser to read, write, and filter for annotations on arbitrary segments of WorldWide Web documents, and share them with any other such user. INTRODUCTION Shared annotations associated with networked information resources allow people to(More)
In a Bayesian framework, we give a principled account of how domain-specific prior knowledge such as imperfect analytic domain theories can be optimally incorporated into networks of locally-tuned units: by choosing a specific architecture and by applying a specific training regimen. Our method proved successful in overcoming the data deficiency problem in(More)
We propose an architecture called InterPay for managing nancial interactions with for-pay digital library services. The approach accommodates multiple payment mechanisms, interaction models, and charging policies. Key components of our model are payment agents and payment capabilities that encapsulate payment policy and the details of payment on behalf of(More)
Scenario: Imagine you want to know what your colleagues in the interest group DLissues have found worth seeing lately. In your browser, you select "Tour annotation set DLissues", with the filter set to "annotations newly created since yesterday". You get a report containing pointers to annotated locations in various documents; you inspect some of these(More)