The simplest mathematical method to estimate tortuosity is the arc-chord ratio: the ratio of the length of the curve (L) to the distance between the ends of it (C): Arc-chord ratio equals 1 for a straight line and is infinite for a circle.
ERS is a set of computer programs set to run in a specified order on the UNISYS Mainframe at the Enterprise. Computing Center in Martinsburg, West Virginia and the Enterprise Computing Center in Memphis, (ECC-MTB and. ECC-MEM) Tennessee. All ERS information is housed on the ERS database at each computing center.
SAP R/3 is the former name of the main enterprise resource planning software produced by SAP AG. It was renamed SAP ERP. It was later renamed Enterprise Central Component or ECC. SAP is an Enterprise Resource Planning software.SAP ECC 5.0 ERP is the successor of SAP R/3 4.70. The newest version of the suite is MySAP 2005 or SAP ECC 6.0. Thanks