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- Filaments of
Meaning in
Word Space: Advances in
Information
Retrieval
(2008), pp.
531-538.Word
space models,
in the sense
of vector
space models
built on
distributional
data taken
from texts,
are used to
model semantic
relations
between words.
We argue that
the high
dimensionality
of typical
vector space
models lead to
unintuitive
effects on
modeling
likeness of
meaning and
that the local
structure of
word spaces is
where
interesting
semantic
relations
reside. We
show that the
local
structure of
word spaces
has
substantially
different
dimensionality
and character
than the
global space
and that this
structure
shows
potential to
be exploited
for further
semantic
analysis using
methods for
local analysis
of vector
space
structure
rather than
globally
scoped methods
typically in
use today such
as singular
value
decomposition
or principal
component
analysis.
Source: Advances in Information Retrieval (2008), pp. 531-538. - Special
Section on
Convergence of
Optical and
Wireless
Access
Networks: Lightwave
Technology,
Journal of,
Vol. 25, No.
11. (2007),
pp.
3216-3218.The
papers in this
special
section are
devoted to the
convergence of
optical and
wireless
access
networks.
Source: Lightwave Technology, Journal of, Vol. 25, No. 11. (2007), pp. 3216-3218. - Using standard
Internet
Protocols and
applications
in space: Computer
Networks, Vol.
47, No. 5. (5
April 2005),
pp.
603-650.This
paper
discusses
approaches for
using standard
Internet
technologies
to meet the
communication
needs of
future space
missions. It
summarizes
work done by
the Operating
Missions as
Nodes on the
Internet
(OMNI) project
at NASA/GSFC
since 1997.
That project
arose from a
small group of
engineers who
had been
involved with
building NASA
communication
systems for
over 20 years.
Since NASA
needed
communication
systems for
space long
before the
Internet
evolved, NASA
developed many
custom
protocols and
communication
techniques to
meet its
"space
specific"
communication
needs.
However, as
the Internet
evolved, it
needed to
address all of
the same
communication
issues of
errors,
delays, and
intermittent
links. Those
challenges may
not have
seemed space
related, but
the solutions
developed can
be used to
address space
communication
issues. The
key is to
select the
appropriate
Internet
Protocols that
can support
space
communication
while also
providing
direct
interoperabili
ty with the
terrestrial
Internet.This
paper uses a
layered
approach to
discuss all
aspects of
using Internet
technologies
in space. It
starts with
the low-level
physical, data
link and data
routing issues
related to
using Internet
Protocols to
support basic
spacecraft
communications
. After
identifying
options for
supporting
basic datagram
delivery in
space, the
paper
describes
issues for
selecting
transport
protocols and
applications
to meet
various
mission data
delivery
needs.
Information is
provided
throughout the
paper to
identify key
implementation
issues and
provide
information on
the current
status of
products in
each area.
Finally,
current
implementation
and usage of
these
protocols in
both
spacecraft and
ground systems
are discussed.
Source: Computer Networks, Vol. 47, No. 5. (5 April 2005), pp. 603-650. - Social
navigation:
techniques for
building more
usable systems: interactions,
Vol. 7, No. 6.
(2000), pp.
36-45.
Source: interactions, Vol. 7, No. 6. (2000), pp. 36-45. - Space and
Place: The
Perspective of
Experience: (08 February
2001)Geography
On the 25th
anniversary of
its
publication, a
new edition of
this
foundational
work on human
geography. In
the twenty
years since
its original
publication,
Space and
Place has not
only
established
the discipline
of human
geography, but
it has proven
influential in
such diverse
fields as
theatre,
literature,
anthropology,
psychology,
and theology.
Eminent
geographer
Yi-Fu Tuan
considers the
ways in which
people feel
and think
about space,
how they form
attachments to
home,
neighborhood,
and nation,
and how
feelings about
space and
place are
affected by
the sense of
time. He
suggests that
place is
security and
space is
freedom: we
are attached
to the one and
long for the
other. Whether
he is
considering
sacred versus
"biased"
space,
mythical space
and place,
time in
experiential
space, or
cultural
attachments to
space, Tuan's
analysis is
thoughtful and
insightful
throughout.
Until retiring
in 1998, Yi-Fu
Tuan was a
professor of
geography at
the University
of
Wisconsin-Madi
son. He is
ranked among
the country's
most
distinguished
cultural
geographers
and has earned
numerous
honors, among
them a
Guggenheim
Fellowship,
the Bracken
Award for
landscape
architecture,
and an award
for
meritorious
contribution
to geography
from the
Association of
American
Geographers.
He was
recently named
the Lauréat
d'Honneur 2000
of the
International
Geographers
Union. He is
the author of
many essays
and books,
including
Escapism
(1998) and
Cosmos and
Hearth
(Minnesota,
1999).
Source: (08 February 2001)
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