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A DATA GRID ARCHITECTURE FOR REAL-TIME ELECTRON MICROSCOPY APPLICATIONS. F. Mighela 1 , C. Perra 2 1 Telemicroscopy Laboratory, 2 DIEE. Contents. Introduction Remote SEM Virtual Laboratory project Grid architecture Conclusions Perspectives. Introduction. - PowerPoint PPT Presentation
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A DATA GRID ARCHITECTURE FOR REAL-TIME ELECTRON
MICROSCOPY APPLICATIONS
F. Mighela1, C. Perra2
1Telemicroscopy Laboratory, 2DIEE
Contents
• Introduction• Remote SEM• Virtual Laboratory project• Grid architecture• Conclusions• Perspectives
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Introduction
• The reasons of the remote microscopy: – Sharing lab resources– Widespread of SEM– Collaborative activities– Extended Training
Change the SEMs working approach
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Remote SEM
• First project: LIMINA laboratory– Server application resident on a PC close to the
instrument– Client application installed on the remote user’s
PC– Server video to stream specimens’ images
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Remote SEM
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CLIENT SERVER MICROSCOPE
REQUEST REQUEST
ANSWER ANSWER
Server/client approach for Remote SEM
Pros• Remote operator has the
same interactivity with the instrument as the local operator
• Sharing instruments between scientists
• Consulting and expertises
Cons• Remote user has to
install a dedicated application on own computer
• If there are more than one instrument, the management becomes onerous
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Virtual Laboratory project
• Actual project: Telemicroscopy Laboratory:– Before: one Scanning Electron Microscope– Now: three Scanning Electron Microscopes and
one Transmission Electron Microscope
The idea of a virtual laboratory has been considered
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Virtual Laboratory Project
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SEM Telemicroscopy Laboratory
@ University of Sassari
SEM CGS Laboratory @
University of Cagliari
SEM Telemicroscopy Laboratory
@ Pula Centre
TEM Pharmanes
@ Pula Centre
Virtual Laboratory Requirements
– Security access;– Security connection;– Real-time interaction;– Interoperability;– Real-time streaming video;– Concurrent access by multiple users to the same
resource;– Public network availability.
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Virtual Laboratory Requirements
• Other favourable aspects:– Common set of commands;– Main commands are independent from the
microscope manufacturer, but are depending just on the instrument class;
A GUI unique for all instruments.
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Virtual Laboratory Requirements
Which technological solution can satisfy allthese requirements?
We suppose the Grid technology!
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Grid technology
• ... allows sharing resources • ... gives a reasonable degree of security connection• ... allows the communication between software
developed with different platforms
It could be the right solution to develop a system to share electron microscopes
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Grid technology features
– Sharing resources and knowledge between different organizations;
– Interoperability;– Services;– Controlled access;– User identification;– Internet protocols;– World Wide Web technologies.
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Grid configuration
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APPLICATION LAYER
MIDDLEWARE LAYER
RESOURCE LAYER
NETWORK LAYER
GRI
D P
ROTO
COL
ARCH
ITEC
TURE
A Grid for a Virtual SEM/TEM Laboratory
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APPLICATION LAYER
Control application
Video streaming application
Workflow application
RESOURCE LAYER
Data storageStreaming server
Microscopes server
MIDDLEWARE LAYER
Resources access control
Server video control
Microscopes control
NETWORK LAYER
Communication protocols
Security protocols
A Grid for a Virtual SEM/TEM Laboratory
• Possible Grid system solutions:– Condor– Legion– Entropia – Globus Toolkit– ......
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A Grid for a Virtual SEM/TEM Laboratory
Literature shows that the most used system fordeveloping Grid solutions is the Globus Toolkit inevery realized version.
We suppose to explore a first solution using Globus Toolkit 4.
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A Grid for a Virtual SEM/TEM Laboratory
Contemporary we will continue to explore theother Grid system solutions, in order to notexclude some architecture that could betterreach our requirements.
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Conclusions
• A project of a Virtual Laboratory on a Grid architecture has started;
• Preliminary analysis has been done describing the high level architecture;
• The GT4 has been choose to implement a first version Virtual Laboratory Grid.
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Next steps
• Test the Globus Toolkit 4 (GT4) software instrument to create the Virtual Laboratory Grid;
• Continue to analyze Grid systems;• Develop a dedicated streaming video; • Test the video application on Digital TV
systems.
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