Semantically-Enabled Virtual Observatories: VSTO Highlights for Observational Data

steelsquareInternet and Web Development

Oct 20, 2013 (3 years and 9 months ago)

67 views

Semantically
-
Enabled Virtual Observatories:

VSTO Highlights for Observational Data

Deborah McGuinness

Acting Director and Senior Research Scientist

Knowledge Systems, AI Laboratory

Stanford University

dlm@ksl.stanford.edu

http://www.ksl.stanford.edu/people/dlm

CEO McGuinness Associates


Joint work with
Peter Fox
, Luca Cinquini, Patrick West, Jose Garcia, James Benedict, Don
Middleton

Partially funded by NSF and NASA


July 9, 2007

Deborah L. McGuinness

2

Virtual Observatory Use Case

Scientists should be able to access a global, distributed
knowledge base of scientific data that appears to be
integrated and locally available

General form of a query: retrieve data (from appropriate
collections) subject to (stated and implicit) constraints and
create a representation of the data in a manner appropriate
for the data and for the end
-
user

Specific Solar Terrestrial examples (from CEDAR AND MLSO):


1. Plot the Neutral Temperature (Parameter) taken by the
Millstone Hill Fabry
-
Perot interferometer (Instrument) looking
in the vertical direction from 1/1/2000


8/31/2000 as a time
series.


2. Find data, representing the state of the neutral atmosphere
anywhere above 100km and toward the Arctic circle (above
45N) at times of high geomagnetic activity.

Tropopause

http://aerosols.larc.nasa.gov/volcano2.swf

July 9, 2007

Deborah L. McGuinness

4

Atmosphere Use Case


Determine the
statistical signatures

of
both volcanic
and solar

forcings

on the
height of the
tropopause


From paleoclimate researcher


Caspar Ammann


Climate and Global
Dynamics Division of NCAR
-

CGD/NCAR


Layperson perspective:


-

look for indicators of acid rain in the part of the atmosphere we
experience…



(look at measurements of sulfur dioxide in relation to sulfuric acid after
volcanic eruptions at the boundary of the troposphere and the
stratosphere)


Nasa funded effort with Fox
-

NCAR, Sinha
-

Va. Tech, Raskin
-

JPL

July 9, 2007

Deborah L. McGuinness

5

Terms



Operationally: Observational data is data collected using
an
instrument
working in an
operating

mode

operated
by an
observatory

at a particular
location

at a particular
time
(range) measuring phenomena or
parameter
s
.



Instrument: An object that measures phenomenon or
parameters.


Observatory: A physical location in which observations
are made.


Data Archive: A collection of information, a file, set of
files, or database made available is machine readable
form with associated metadata concerning the data’s
origin, purpose and use.


Data product: A formalized and reproducible
representation of data elements for consumption by a
user or machine process.



July 9, 2007

Deborah L. McGuinness

6




July 9, 2007

Deborah L. McGuinness

7

In W3C

Ontology rec:

OWL

July 9, 2007

Deborah L. McGuinness

8

Partial

exposure

of

Instrument

class

hierarchy

-

users

seem

to

LIKE

THIS

Semantic

filtering

by

domain

or

instrument

hierarchy

July 9, 2007

Deborah L. McGuinness

9

VSTO Highlights: Capabilities, Tools, Extensibility


Reasoning provides new capabilities:


Unified query workflow


Decreased input requirements for query: in one base reducing the number
of selections from eight to three


Interface generates only syntactically correct queries: which was not always
ensurable in previous implementations without semantics


Semantic query support: by using background ontologies and a reasoner,
our application has the opportunity to only expose coherent query


Semantic integration: previously users had to remember (and maintain
codes) to account for numerous different ways to combine and plot the data
whereas now semantic mediation provides the level of sensible data
integration required


A broader range of potential users (PhD scientists, students, professional
research associates and those from outside the fields)


Tools / Methodology


Reusing OWL
-
based tools


Protégé, Swoop, Pellet along with social and
technological conventions


Service wrappers to access data stores (CEDAR and MLSO currently)


Methodology


Semantic Technologies as an interactive process


Easily extensible:


Use existing ontology tools to expand ontology


Tested in SESDI


volcanoes, plate tectonics, atmosphere


Must be monotonic extensions to model


July 9, 2007

Deborah L. McGuinness

10

Pointers


Virtual Solar Terrestrial Observatory
-

vsto.org


Most recent paper: Deborah McGuinness, Peter Fox, Luca Cinquini, Patrick West, Jose Garcia,
James L. Benedict, and Don Middleton. The Virtual Solar
-
Terrestrial Observatory: A Deployed
Semantic Web Application Case Study for Scientific Research. In the proceedings of the Nineteenth
Conference on Innovative Applications of Artificial Intelligence (IAAI
-
07). Vancouver, British
Columbia, Canada, July 22
-
26, 2007.
www.ksl.stanford.edu/KSL_Abstracts/KSL
-
07
-
01.html


Semantically
-
Enabled Science Data Integration sesdi.hao.ucar.edu


Most recent paper:

Deborah L. McGuinness, Peter Fox, Krishna Sinha, Rob Raskin. Semantic
Integration of Heterogeneous Volcanic and Atmospheric Data. In the proceedings of the
Geoinformatics Conference, San Diego, CA. May 17
-
18, 2007.
gsa.confex.com/gsa/2007GE/finalprogram/abstract_122252.htm



Community Website


www.PlanetOnt.org



Building Community:


AGU earth and space science informatics sessions


submission deadline Sept 6 (special issue of
Computers and Geosciences
www.elsevier.com/wps/find/journaldescription.cws_home/398/description#description



GSA Geoinformatics sessions (abstract deadline tomorrow)


VOIG community


Virtual Observatories in GeoSciences
www.egy.org/VOiG/Home.html



New Springer Journal
-

JESI


Journal of Earth Science Informatics
-

www2.gsu.edu/~geohab/pages/Journal%20of%20Earth%20Science%20Informatics/JESI.htm



July 9, 2007

Deborah L. McGuinness

11

Extra



July 9, 2007

Deborah L. McGuinness

12

Content: Coupling Energetics and Dynamics of
Atmospheric Regions WEB

Community data
archive for
observations and
models of
Earth's upper
atmosphere and
geophysical
indices and
parameters
needed to
interpret them.

Includes

browsing
capabilities by
periods,
instruments,
models, …

July 9, 2007

Deborah L. McGuinness

13

Content: Mauna Loa Solar Observatory

Near real
-
time
data from Hawaii
from a variety of
solar instruments.

Source for space
weather, solar
variability, and
basic solar
physics

Other content used
too


CISM


C
enter
for
I
ntegrated
S
pace
Weather
M
odeling