semantic grid print

8/8/2019 Semantic Grid Print

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Seeking the Semantic Pervasive GridSeeking the Semantic Pervasive Grid


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Semantic

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GridPervasive

Th

e Magic Triangle

Pervasive + Grid

Semantic + GridPervasive + Semantic


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There is more information available at ourfingertips during a walk in the woods than inany computer system, yet people find a walkamong trees relaxing and computersfrustrating. Machines that fit the humanenvironment, instead of forcing humans toenter theirs, will make using a computer as

refreshing as taking a walk in the woods.[Weiser, 1991]

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Pervasive computing is the means by whichthe digital world of the Grid couples intoour physical world. [De Roure 2003]

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In other words, pervasive computing provides the

manifestation of the Grid in the physical world.

[De Roure 2003]


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Both Grid and Pervasive computing are about largenumbers of distributed processing elements. [De

Roure, 2003]

Similar computer science challenges in distributed systems:

Service description, discovery, and composition

Issues of availability and mobility of resources

Autonomic behavior

Security, authentication and trust

Ease of dynamic assembly of componentsRely on interoperability

The peer-to-peer paradigm is

relevant across both picture.

[De Roure, 2003]


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Pervasive computing benefits Grid computing incollaborative environments

-------

Grid computing benefitsP

ervasive computing inprocessing higher volumes of data

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Grid computing and pervasive computing are two visions of the

future that really do seem to be upon us, and so surely they

must be investigated together rather than in isolation. [De

Roure, 2003]


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Service description, discovery, and composition

dynamic assembly of Grid components

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OGSA:

Open Grid Service Architecture

defines a SOA for

Grid resources. [Globus Project, OASIS]

WSRF: Web Services Resource Framework defines theinteraction with stateful resources in standard and interoperable ways.

[Globus Project, OASIS]

Semantic Web services become synergistic to the

current Grid approach.


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A Grid service is a Web service that conforms to a

set of conventions (interfaces and behaviours)that define how a client interacts with the Grid

service. [Geldof, 2004]


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Simply speaking the Semantic Grid can be

described as an extension of the current Grid inwhich information and services are given well

defined meaning, better enabling computers and

people to work in cooperation. [Geldof, 2004]


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Possible application areas:

Biological and life science fields (Jim Hendler,

Maryland)

Cross organizational insurance settlement, or similar

(Carole Goble, Manchester)

Composition of workflows of services (semi-)

automatically by reasoning (Yolanda Gil, SouthernCalifornia)


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More general:

Humans are very much part of virtual organisations

and the Semantic Grid has to facilitate theircollaboration, both in establishing the appropriate

coalitions and in supporting interaction within them.

[De Roure et al., 2005]


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DERI and 18 (non-) EU partners definedthe FP6-2004-IST-5 project

to align the achievements of the Gridcommunity with the efforts aroundSWS.

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www.semanticgrid.org


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BUT Pervasive computing helps too:

We need to automate metadata capture as far as

possible: We need to take it out of the hands of the

users and look instead to the pervasive computing

devices to do the dull work. [De Roure, 2003]

The Semantic Web helps: Semantic annotation with context information

Linking up disparate metadata


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Essentially we have lots of distributed bits and

pieces that need to work together to provide therequisite global behaviour, and we wish this tohappen without manual intervention. [], and inthe future we look towards self-organisation. This

is the vision of AUTONOMIC COMPUTING.[De Roure, 2003]

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This is somehow also the driving ideabehind

Ubiquitous Semantic Spaces

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GIS

P

Space

modern art museum


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Semantic

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GridPervasive

They need to happen together!


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Semantic Pervasive Grid

Through combining grid and pervasive and

semantic we see a comprehensive infrastructure

for the vision of ambient intelligence. It is the

manifestation of the Semantic Grid in thephysical world. [De Roure, 2003]


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1. Resource description, discovery and use Process huge volumes of distributed content

2. Process description and enactment Creation of virtual organisations, workflows

3. Autonomic behaviour Auto-configuration, self-healing

4. Security and trust Core of virtual organisations, ownership

5. Annotation

Meta-content for data, information or knowledge

6. Information integration Interoperability of information, ontology mapping



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7. Synchronous information streams and fusion Real-time, notification, merging of streams

8. Context-aware decision support Sensitive to context and task at hand

9. Communities Collaborative tools within virtual organisations

10.Smart environments


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This brings with it a lot of work:

Current solutions (such as triple stores) tend to

favor a world of fairly static metadata grid

applications challenge this, and pervasive evenmore. There is much important work to be done

on this edge of the triangle. [De Roure, 2003]

Let us use these technologies to do new,interesting, creative and enjoyable things [De

Roure, 2003]


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1. Automated Virtual Organisation Formation andManagement

Composition, scheduling, monitoring, healing

2. Service Negotiation and Contracts Determination and interoperability of contracts

3. Security, Trust and Provenance Digital Rights Management, computational trust

4. Metadata and Annotation Languages, tools, deployment of ontologies

5. Content Processing and Curation Multimedia content, distributed annotation, autonomic curation



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6. Knowledge Technologies NLP, reasoning, knowledge capture tools, data mining,

7. Design and Deploy Ease of designing, configuring and deployment

8.Interaction Visualisation of information, adaptability

9. Collaboration Tailor working environment, communities, HCI

10.Pervasive Computing

Semantic Pervasive Grid



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3 technologies: Pervasive + Grid + Semantic

2 keywords: virtual organisation, autonomic

computing

1 goal: Better enabling computers and people towork in cooperation

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The biggest challenge to be overcomeappears to be of non-technical nature:having people from different fields talk,

work and evolve together. [Geldof,2004]

Lets not throw the first stone, but makeLets not throw the first stone, but makethe first step!the first step!

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De Roure, D. (2003): Semantic Grid and PervasiveComputing. 1st GGF Semantic Grid Workshop at9th Global Grid Forum (GGF9), Chicago, USA.

De Roure, D., Jennings, N.R., and Shadbolt, N.R.

(2005): The Semantic Grid: Past, Present and Future.Proc. of the IEEE, Vol. 93(3), March 2005: 669 -681.

Geldof, M. (2004): The Semantic Grid: will SemanticWeb and Grid go hand in hand?. Grid technologies

unit of th

e European Commission, June 2004.Weiser, M. (1991): The Computer for the 21stCentury. Scientific American, Sept. 1991.

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