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Tutorials
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Gilles
Brassard
INTRIQ and Université de
Montréal
Quantum
Information Processing
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After the discovery of quantum
mechanics one century ago, physics will
never be the same again. Now, information theory and computer science
are catching up in ways that could be just as revolutionary. Quantum
information can be harnessed to accomplish wonders that are beyond the
reach of classical information processing devices. For instance,
quantum computers can perform more parallel computation in a single
piece of hardware than would be possible for a classical computer the
size of the Universe. They have the potential to bring to their knees
most |
classical
cryptographic schemes currently used on the Internet to
protect transactions
such as the transmission of credit card numbers. Fortunately, quantum
cryptography fights back by making it possible to fulfill the
cryptographer's age-old dream of
unconditional confidentiality in communications. Quantum nonlocality
gives rise to the possibility of computing in a distributed environment
with the expenditure of spectacularly less information transfer between
the participants than would be required classically, and sometimes we
can do away with communication altogether: This is the mysterious realm
of pseudo-telepathy. Speculation? Future will tell!
No
prior knowledge of quantum mechanics or cryptography will be
expected from the audience. |
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Hossam Hassanein
Queen's University
Wireless Ad hoc and Sensor Networks -- Challenges and
Opportunities
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As computing and communications are
converging, wireless ad hoc and sensor networks have attracted more and
more attention in recent years. These networks will revolutionize
information gathering and processing in both urban environments and
inhospitable terrain. A wireless ad hoc network is an autonomous system
consisting of mobile hosts (serving as routers) connected by wireless
links. Such networks can be quickly and widely deployed to serve a
multiplicity of purposes. Example applications of wireless ad hoc and
sensor networks include, among |
others,
emergency search-and-rescue operations, decision making in the
battlefield and data acquisition operations. Wireless
sensor networks consist of tiny computing and sensing devices equipped
with wireless (ad hoc like) multi-hop communication
capability. Sensor networks have already
entered many aspects of our lives. As a result, the last few years have
witnessed a wealth of research ideas on ad hoc and sensor networks that
are moving rapidly into commercialization and standardization. Such
networks can be randomly and rapidly deployed and reconfigured and
easily tailored to specific applications including civilian, military,
entertainment, etc. Moreover, an ad hoc architecture is highly
robust to node failure and can provide a
high-level of fault tolerance due to nodal redundancy and its
distributed nature. Several challenges are standing in the way to
achieving ubiquitous deployment and usability of ad hoc and sensor
networks. These include variable topology, device heterogeneity,
limited power supply and the lack of effective energy-efficient design.
This tutorial will review wireless ad hoc and sensor networks, and look
at the fundamental issues in their design, analysis, deployment and
emerging applications. Localization, tracking and query processing will
be used as examples to demonstrate the advantages and also expose the
scalability constraints in ad hoc and sensor networks. The following
topics will be covered: device deployment, coverage, connectivity,
routing, data flow management, in-network query processing, distributed
algorithmic techniques and peer-to-peer computing. |
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