On the basis of topological criteria, metazoan traces can be classified as four ichnoorders (clusters) and twenty-two ichnofamilies (kinds), which consist of ni
Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS(Location Based Service) is arising. To provide location based service, tracking data s
Shared nothing spatial database cluster system provides high availability since a replicated node can continue service even if any node in cluster system was crashed. However if the failed node would