Redefining tactical operations for MER using cloud computing
The Mars Exploration Rover Mission (MER) includes the twin rovers, Spirit and Opportunity, which have been performing geological research and surface exploration since early 2004. The rovers' durability well beyond their original prime mission (90 sols or Martian days) has allowed them to be a valuable platform for scientific research for well over 2000 sols, but as a by-product it has produced new challenges in providing efficient and cost-effective tactical operational planning. ***
Secure and Cost Effective Framework for Cloud Computing Based On optimization and Virtualization
Cloud computing is emerging technology in today’s era. Its popularity is because of flexibility, scalability, cost reduction and on-demand service. But there is the demand of security in User-Cloud environment, because of dependency increases on the cloud. Several companies chooses cloud environment for business prospective. So when we choose cloud environment we must think about the security issue, because our data is crucial. I study several research papers in this regards. So in this paper i proposed a security framework which is used for IaaS, PaaS and SaaS by the help of Optimization algorithms. In this paper we first survey and analyzes the research work which concentrates on security and reliability issues, then we consider optimization techniques which is helpful for maintaining the security. So overall i want to introduce security model which is more efficient and
Heat Recovery Systems
Geothermal energy is recovered from an underground zone of relatively hot strata via a borehole into which is inserted a heat pipe system containing a working fluid, the heat pipe system comprising an assembly of two tubes in concentric relation, the inner tube being constituted by a relatively small diameter capillary for the return of working fluid to the vicinity of the zone of the relatively hot strata. The working fluid is preferably assisted in its return under gravity by means of a pump. The system includes heat exchange means operable to recover thermal energy from the working fluid. A third and outermost tube may be used to reduce heat losses, this third tube enclosing the two tubes over all but that part of their length which is in the zone of relatively hot strata.