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To join a Virtual Organisation you need to be able to prove who you are electronically. This is similar to the way that a passport is used to prove your identity when you cross international borders. Within the Grid community this is frequently done through the use of a certificate – generally issued by proving your identity to someone at your local institute. Some organisations allow you to generate a certificate through your existing ability to access your organisation’s own network.

Once you are able to identify yourself you can apply to join a Virtual Organisation. Different Virtual Organisations exist to cover the needs of different communities. A community may have more than one Virtual Organisation within it with each one having different entry criteria and possibly providing access to different resources.

Information

With many thousands of services potentially available to a user, discovering which one to use presents many challenges. The infrastructure is continually changing – services are appearing, disappearing or being upgraded as the sites evolve. Being able to discover, in near real-time, the types of services that are available, the Virtual Organisations that are able to access them, and the characteristics of each service (i.e. the data that it stores or the speed of the processors), and the load on the service, are all information points that can drive which service to select.

The information collected by gLite on the resources within the infrastructure can be presented in many ways. The information can be browsed directly through a web portal, searched manually through command line tools, or programmatically from within an application.

Data

Many of the researchers that use EGEE’s infrastructure do so in order to analyse data stored in files. Frequently these files are stored at locations different from the currently available computational resources. EGEE provides services that allow users to retrieve a file from off-line tape storage onto disk, and to then move that file to the site where the computational resources for that user is going to be available. (This method of data storage and retrieval is normal in high energy physics experiments and frequently used in other communities dealing with large archived data sets such as climate modelling and satellite observation records.)

How does a user locate the file that they need to use on an infrastructure where the location of files is continually changing? File catalogues run by some communities provide a register where a ‘logical’ file name can be mapped to a number of physical replicas. Having files stored in multiple places has many benefits - files are still available even if one of the sites storing the files is temporarily disconnected from the network or the service is down. Software can be written to exploit the distributed location of the files so as to run an application on the computing resources located near to their storage location – thereby reducing the time taken to move the files from their storage location to the compute resources.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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Source:  OpenStax, Research in a connected world. OpenStax CNX. Nov 22, 2009 Download for free at http://cnx.org/content/col10677/1.12
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