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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. - Definition and
Detection of
Outliers in
Chemical Space: J. Chem. Inf.
Model. (25
July
2008)Abstract:
Detection of
outliers is a
complex and
challenging
area of
research in
chemical
theory. Among
current
notions, that
of outliers in
the chemical
spacedescripto
rsis
meaningful
with multiple
applications
in the field
of drug
discovery and
predictive
modeling.
Presented here
is a new
framework for
outlier
detection,
relying on a
discrete,
fragment-based
representation
of the
molecular
structures.
From this
starting
point, a
recursive
method is
developed that
quantifies the
contribution
of fragments
to compound
description
and identifies
outliers in
chemical
structure
databases
according to a
novel
definition. In
contrast to
existing
detection
routes, this
approach
avoids the use
of thresholds
usually
required to
quantify
outlying
behavior.
Three chemical
databases are
investigated
to demonstrate
its generality
and
flexibility.
The result
reveals a new
species of
outliers,
compounds with
no specific
structural
features,
rather than
unique ones.
Source: J. Chem. Inf. Model. (25 July 2008) - 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.
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