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We all recognise that continued partnership in the next couple of years will be critical in terms of ensuring that the Grid operates effectively and efficiently . If you decide to join the Registry you will be told about approved research projects . Submitting centers can request pooled information concerning specific questions on request by sending the questions to be addressed to the Registry Director . The UK is the biggest single contributor to the LCG , with more than a fifth of the Grid 's processing power at its 16 sites . The completed forms can be mailed to the Registry Director at the address on the Home Page or by electronic mail to GSerwer@umich.edu . As part of NASA 's distributed operations network , there is a mini-control centre at Imperial College directly connected to the Spacecraft Control Centre at the Jet Propulsion Laboratories ( JPL ) in Pasadena , California . The discovery of VHE gamma-rays from such sources suggests that they may be ` dark accelerators ' , as Stefan Funk from the Max-Planck Institut in Heidelberg affirms : " These objects seem to only emit radiation in the highest energy bands . This requires special middleware - the software that allows seamless operations across multiple institutional domains - so that users of the Grid perceive it as a single resource . The president of the San Antonio chapter of the NAACP was even less specific .