Agents and mobile appliances offer the promise to change the way people purchase products by connecting the physical presence of stores with their Internet representation and delegating consumer tasks to intelligent pieces of autonomous software. The archetypical example is the shopping mall of the future; shoppers use personal digital assistants (PDA) to interact with store services while in t...

This paper presents the design, implementation, and evaluation of CATS, a toolkit for indexed state storage for network services. CATS is based on a new implementation of a persistent authenticated dictionary, which integrates signed action records and cryptographic state digests into an index. This storage abstraction enables a CATS-based network service to certify its operations: any client w...

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We implement an elementary, yet useful form of A-box reasoning using a database to store asserted descriptions of individuals. This provides an effective instance store which can be used in a wide range of applications, including web services discovery and genes classification.

We studied how people use file sync and sharing services to better understand how early adopters conceptualize their interactions with the cloud. A survey of 105 users provided background information about current use of these cloud storage services and identified 18 people for in-depth interviews. Use cases described in the interviews revealed a hierarchy of concepts that participants needed t...

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The paper is about design of object stores for distributed memory computers. Problems of distribution within such stores are described through the design of Distributed Texas, a system derived from the Texas store [6] and implemented on a scalable multicomputer (a Fujitsu AP1000). Problems discussed include creating a single image of an object space across multicomputer architectures, tradeoffs...

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