101 research outputs found
Understanding tradeoffs in incremental deployment of new network architectures
Despite the plethora of incremental deployment mechanisms proposed, rapid adoption of new network-layer protocols and architectures remains difficult as reflected by the widespread lack of IPv6 traffic on the Internet. We show that all de-ployment mechanisms must address four key questions: How to select an egress from the source network, how to select an ingress into the destination network, how to reach that egress, and how to reach that ingress. By creating a de-sign space that maps all existing mechanisms by how they answer these questions, we identify the lack of existing mech-anisms in part of this design space and propose two novel approaches: the “4ID ” and the “Smart 4ID”. The 4ID mech-anism utilizes new data plane technology to flexibly decide when to encapsulate packets at forwarding time. The Smart 4ID mechanism additionally adopts an SDN-style control plane to intelligently pick ingress/egress pairs based on a wider view of the local network. We implement these mech-anisms along with two widely used IPv6 deployment mech-anisms and conduct wide-area deployment experiments over PlanetLab. We conclude that Smart 4ID provide better overall performance and failure semantics, and that inno-vations in the data plane and control plane enable straight-forward incremental deployment
Regulating Access to Adult Content (with Privacy Preservation)
In the physical world we have well-established mechanisms for keeping children out of adult-only areas. In the virtual world this is generally replaced by self declaration. Some service providers resort to using heavy-weight identification mechanisms, judging adulthood as a side effect thereof. Collection of identification data arguably constitutes an unwarranted privacy invasion in this context, if carried out merely to perform adulthood estimation. This paper presents a mechanism that exploits the adult's more extensive exposure to public media, relying on the likelihood that they will be able to recall details if cued by a carefully chosen picture. We conducted an online study to gauge the viability of this scheme. With our prototype we were able to predict that the user was a child 99% of the time. Unfortunately the scheme also misclassified too many adults. We discuss our results and suggest directions for future research
E-readers and the death of the book: or, new media and the myth of the disappearing medium
The recent emergence of e-readers and e-books has b
rought the death of the book to the centre of
current debates on new media. In this article, we a
nalyse alternative narratives that surround the
possibility of the disappearance of print books, do
minated by fetishism, fears about the end of
humanism, and ideas of techno-fundamentalist progre
ss. We argue that, in order to comprehend
such narratives, we need to inscribe them in the br
oader history of media. The emergence of new
media, in fact, has often been accompanied by narra
tives about the possible disappearance of
older media: the introduction of television, for in
stance, inspired claims about the forthcoming
death of film and radio. As a recurrent narrative s
haping the reception of media innovation, the
myth of the disappearing medium helps us to make se
nse of the transformations that media
change provokes in our everyday life
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