An ERD (Entity Relationship Diagram) is a graphical representation of the data in rest within a system (e.g. a business, an organization, an application) that is subject to analysis.
1. REFERENCE DOSE (RfD): DESCRIPTION AND USE IN HEALTH RISK ASSESSMENTS. 1.1. INTRODUCTION. This concept paper describes the U.S. Environmental Protection Agency's (U.S. EPA) principal approach to and rationale for assessing risk for health effects other than cancer and gene mutations from chronic chemical exposure.
RFD-TV is the flagship network for Rural Media Group. Launched in December 2000, RFD-TV is the nationâs first 24-hour television network featuring programming focused on the agribusiness, equine and the rural lifestyle, along with traditional country music and entertainment.