Browse Research and Tech Reports - Computer Science by Author "Campbell, Roy H."

  • Naisbitt, Jeffrey D.; Al-Muhtadi, Jalal F.; Campbell, Roy H. (2005-05)
    Ubiquitous computing environments and the plethora of mobile devices that populate them have led to a global trend for remote collaboration and interaction. This trend demands seamless in-terfaces for remote interaction ...

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  • Verma, Abhishek; Zea, Nicolas; Cho, Brian; Gupta, Indranil; Campbell, Roy H. (2010-01-19)
    The MapReduce model uses a barrier between the Map and Reduce stages. This provides simplicity in both programming and implementation. However, in many situations, this barrier hurts performance because it is overly ...

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  • Andrews, Christopher R.; Sampemane, Geetanjali; Weiler, Andrew; Campbell, Roy H. (2004-08)
    We present a user-centric input system that is useful for a variety of applications in ubiquitous computing environments. Users in these environments currently switch between different keyboards and mice, or other devices, ...

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  • Kang, Kyungtae; Jeon, Won J.; Park, Kyung-Joon; Campbell, Roy H.; Nahrstedt, Klara (2009-03)
    The recent development of high-speed data transmission over wireless cellular networks has enabled the delivery of multimedia broadcasting services to mobile users. These services involve a range of interactions among ...

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  • Kyungtae, Kang; Jeon, Won J.; Park, Kyung-Joon; Campbell, Roy H.; Nahrstedt, Klara (2009-03)
    The recent development of high-speed data transmission over wireless cellular networks has enabled the delivery of multimedia broadcasting services to mobile users. These services involve a range of interactions among ...

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  • Anwar, Zahid; Potter, Shaya; Narayanaswami, Chandra; Yurcik, William; Gunter, Carl; Campbell, Roy H. (2008-04)
    Voice over IP (VoIP) is more susceptible to Denial of Service attacks than traditional data traffic, due to the former's low tolerance to delay and jitter. We describe the design of our VoIP Vulnerability Assessment Tool ...

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  • Kapadia, Apu C.; Naldurg, Prasad G.; Campbell, Roy H. (2006-02)
    This paper presents an access control model that preserves the unlinkability of audit-logs in a distributed environment. The model restricts entities from accessing and correlating two or more audit-records belonging to ...

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  • Abad, Cristina L.; Luu, Huong; Lu, Yi; Campbell, Roy H. (2012-03-12)
    Efficient namespace metadata management is becoming more important as next-generation file systems are designed for the peta and exascale era. A number of new metadata management schemes have been proposed. However, ...

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  • Shankar, Chetan S.; Campbell, Roy H. (2005-11)
    A pervasive system features a plethora of devices, services and applications organized as a large distributed system. One approach to managing such systems is by policies where administrators specify the management action ...

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  • David, Francis M.; Chan, Ellick M.; Carlyle, Jeffrey C.; Campbell, Roy H. (2007-03)
    Choices, an object-oriented operating system, has been ported to the ARM architecture. The porting effort was based on the existing code-base for the SPARC processor based SPARCStation 1. Choices supports two ARM-based ...

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  • Yang, Zhenyu; Cui, Yi; Anwar, Zahid; Bocchino, Robert L., Jr.; Kiyanclar, Nadir; Nahrstedt, Klara; Campbell, Roy H.; Yurcik, William (2005-08)
    Tele-immersive system can improve the productivity and aid communication by allowing distributed parties to exchange information via a shared immersive experience. The TEEVE research project at the University of Illinois ...

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  • David, Francis M.; Campbell, Roy H. (2007-03)
    User applications and data in volatile memory are usually lost when an operating system crashes because of errors caused by either hardware or software faults. This is because most operating systems are designed to stop ...

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  • Montanari, Mirko; Chaugule, Amey; Campbell, Roy H. (2011)
    Policies are used extensively in managing the security of large computer infrastructure systems. Many large organizations and several government entities such as the National Institute for Standards and Technology (NIST) ...

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  • Kapadia, Apu C.; Naldurg, Prasad G.; Campbell, Roy H. (2006-01)
    We present a model for trustworthy communication with respect to security and privacy in heterogeneous networks. In general, existing privacy protocols assume independently operated nodes spread over the Internet. Most of ...

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  • Jeon, Won J.; Campbell, Roy H. (2007-12)
    Virtual worlds provide 3D-immersive experiences to users and some of them already have already launched commercial service to users. As computing environment becomes more heterogeneous, more mobile users are anticipated ...

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  • Liang, Yingyi; Campbell, Roy H. (2008-05)
    The recent international standard IEC 61850 proposes a unified solution of the communication aspect of substation automation. However, the standard itself is not easily understood by users other than domain experts. We ...

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  • Kapadia, Apu C.; Naldurg, Prasad G.; Campbell, Roy H. (2005-08)
    We propose a policy-based framework using RBAC (Role Based Access Control) to address the unlinkability problem in the context of correlating audit records generated from access to distributed services. We explore this ...

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  • Ranganathan, Anand; Campbell, Roy H. (2005-05)
    Distributed systems are getting bigger and more complex. While the complexity of large-scale distributed systems has been acknowledged to be an important challenge, there has not been much work in defining or measuring ...

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