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Computational proxies an object-based infrastructure for computational science
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3752023542007_199504.cushing.judith.pdf
Description
Rights
http://www.ohsu.edu/xd/education/library/services/theses-dissertations/rights-statement.cfm
Title
Computational
proxies
an
object-based
infrastructure
for
computational
science
Creator.PersonalName
Cushing
,
Judith
Bayard
Thesis.Degree
Ph.D.
Thesis.Major
Computer Science and Engineering
Thesis.DateDegreeAwarded
April
1995
Institution
Oregon Graduate Institute of Science & Technology
Department
Dept. of Computer Science and Engineering
Thesis.Advisor/Mentor
Maier, David
Thesis.Committee
Feller, David F.
Otto, Steve W.
Walpole, Jonathan
Subject.LCSH
Data structures (Computer science)
Database management
File organization (Computer science)
Object-oriented methods (Computer science)
Call Number
Q183.5.OGI C884 1995
Description.Abstract
Scientific
computing's
rich
legacy
of
data
and
programs
contains
its
own
major
disadvantage
:
lack
of
interoperability
at the
user
level
.
Even
within
a
single
subfield
,
scientists
are
faced
with a
plethora
of
potentially
useful
programs
that
run
on a
number
of
different
computers
.
When
these
programs
do
not "
interoperate
",
such
simple
but
desirable
tasks
as
using
the
output
of
one
program
as the
input
of
another
become
major
obstacles
to "
doing
science
".
Accessing
data
and
running
programs
in
heterogeneous
computing
environments
further
compounds
problems
of
interoperability
because
of
considerable
differences
in
data
representation
,
file
transfer
and
program
control
protocols
among
computer
platforms
. In
addition
,
during
a
single
investigation
, a
typical
scientist
might
name
and
keep
track
of
hundreds
of
files
on
several
different
computers
. This
dissertation
addresses
problems
of
data
management
and of
program
and
data
interoperability
among
computational
science
applications
.
We
postulate
that a
database
of
experiment
data
would
alleviate
problems
of
interoperability
and
file
management
, but that
connecting
a
database
to
existing
applications
is
neither
straightforward
nor
adequate
for
computational
applications
.
We
propose
a
middleware
solution
built
within
a
database
tradition
, and
describe
the
functionality
needed
for
computational
experiment
management
.
We
believe
that a
data-centered
solution
to
interoperability
problems
--
one
that
makes
current
versions
of
data
available
to
cooperating
user
applications
and
system
services
--
shows
particular
promise
.
Our
solution
consists
of a
domain-specific
information
model
and an
object-oriented
persistent
structure
that
supports
computation
as
well
as
data
management
. This
abstract
data
structure
,
dubbed
"
computational
proxy
",
models
within
an
object
database
scientific
programs
and
processes
.
Proxies
maintain
persistent
local
records
of
on-going
computational
experiments
, and
provide
a
consistent
view
of
different
applications
executing
on
multiple
processors
. They
provide
for
launching
and
monitoring
experiments
;
generating
data
input
to the
experiment
from the
database
; and
capturing
experimental
results
. The
computational
proxy
mechanism
also
provides
ways
to
declaratively
define
the
database
interface
to
computational
applications
. The
infrastructure
we
propose
can
be
used
in a
migration
path
from
stand-alone
legacy
applications
to
distributed
database
services
and
adapted
for
newer
object-based
applications
. A
prototype
of the
computational
proxy
infrastructure
has been
implemented
in
C++
and
ObjectStore
on a
Sun
Sparcstation
for
applications
in
ab
initio
computational
chemistry
.
Language
eng
Type
Text
Format.Use
Needs Adobe Acrobat Reader to view.
Format.FileType
pdf
Format.FileSize
10313.972 KB
OCLC number
41032927
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Computational proxies an object-based infrastructure for computational science 