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Author

Jon Crowcroft

Bio: Jon Crowcroft is an academic researcher from University of Cambridge. The author has contributed to research in topics: The Internet & Multicast. The author has an hindex of 87, co-authored 672 publications receiving 38848 citations. Previous affiliations of Jon Crowcroft include Memorial University of Newfoundland & Information Technology University.


Papers
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01 Jan 2012
TL;DR: Through this short position paper, the thoughts on the need for free Internet access are conveyed and possible ways of achieving this are described hoping this stimulates a useful discussion.
Abstract: Through this short position paper, we hope to convey our thoughts on the need for free Internet access and describe possible ways of achieving this hoping this stimulates a useful discussion.

6 citations

Posted Content
TL;DR: In this paper, the authors propose using the idea of ''textit{approximate networking'' to adapt to these adverse "undeveloping" societal conditions, which will provide ''good-enough'' networking services by employing ''contextually appropriate'' tradeoffs.
Abstract: Internet is the linchpin of modern society, which the various threads of modern life weave around. But being a part of the bigger energy-guzzling industrial economy, it is vulnerable to disruption. It is widely believed that our society is exhausting its vital resources to meet our energy requirements, and the cheap fossil fuel fiesta will soon abate as we cross the tipping point of global oil production. We will then enter the long arc of scarcity, constraints, and limits---a post-peak "long emergency" that may subsist for a long time. To avoid the collapse of the networking ecosystem in this long emergency, it is imperative that we start thinking about how networking should adapt to these adverse "undeveloping" societal conditions. We propose using the idea of "\textit{approximate networking}"---which will provide \textit{good-enough} networking services by employing \textit{contextually-appropriate} tradeoffs---to survive, or even thrive, in the conditions of scarcity and limits.

6 citations

Patent
26 Oct 2011
TL;DR: A containment system may include generating and/or sending an alert as the basis for safely sharing knowledge about detected worms as mentioned in this paper, which may contain information that proves that a given program has a vulnerability.
Abstract: A containment system may include generating and/or sending an alert as the basis for safely sharing knowledge about detected worms. An alert may contain information that proves that a given program has a vulnerability. The alert may be self-certifying such that its authenticity may be independently verified by a computing system.

5 citations

Proceedings ArticleDOI
01 Jan 1998
TL;DR: A protocol is proposed by which people communicating using different conference control mechanisms can be seamlessly integrated into a single conference control mechanism which will interoperate between two different types of conferences.
Abstract: This paper describes a protocol by which people communicating using different conference control mechanisms can be seamlessly integrated into a single conference control mechanism. A generic approach to conference control, General Conference Control Protocol (GCCP) is proposed to support and bind formal/tightly coupled multimedia conference (ITU standardised) with the informal/loosely coupled conference (IETF based). These two types of conferences are used by two different types of community and the innate differences in the underlying architecturc of IETF and ITU based conferencing makes it difficult to interoperate. The differences and the similarities of these two architectures are explored and a protocol is proposed in this paper which will interoperate between two different types of conferences. A single generic conference control system covers a range of services provided by different conference controls. Participants in different kind of conferencing with different kind of underlying architecture can use a particular type of service(s) from generic conference control which will integrate them into a single mechanism. The appropriate and relevant features of existing conference control mechanisms have been used to design a tool for conference management.

5 citations


Cited by
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Journal ArticleDOI

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08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Journal ArticleDOI
TL;DR: In this paper, Imagined communities: Reflections on the origin and spread of nationalism are discussed. And the history of European ideas: Vol. 21, No. 5, pp. 721-722.

13,842 citations

Journal ArticleDOI
TL;DR: A thorough exposition of community structure, or clustering, is attempted, from the definition of the main elements of the problem, to the presentation of most methods developed, with a special focus on techniques designed by statistical physicists.
Abstract: The modern science of networks has brought significant advances to our understanding of complex systems. One of the most relevant features of graphs representing real systems is community structure, or clustering, i. e. the organization of vertices in clusters, with many edges joining vertices of the same cluster and comparatively few edges joining vertices of different clusters. Such clusters, or communities, can be considered as fairly independent compartments of a graph, playing a similar role like, e. g., the tissues or the organs in the human body. Detecting communities is of great importance in sociology, biology and computer science, disciplines where systems are often represented as graphs. This problem is very hard and not yet satisfactorily solved, despite the huge effort of a large interdisciplinary community of scientists working on it over the past few years. We will attempt a thorough exposition of the topic, from the definition of the main elements of the problem, to the presentation of most methods developed, with a special focus on techniques designed by statistical physicists, from the discussion of crucial issues like the significance of clustering and how methods should be tested and compared against each other, to the description of applications to real networks.

9,057 citations

Journal ArticleDOI
TL;DR: A thorough exposition of the main elements of the clustering problem can be found in this paper, with a special focus on techniques designed by statistical physicists, from the discussion of crucial issues like the significance of clustering and how methods should be tested and compared against each other, to the description of applications to real networks.

8,432 citations