β Scribed by Ken-ichi Kanatani
No coin nor oath required. For personal study only.
Behind every data base management system, whether consciously planned or not, is a data model: a precise description of what types of information can be represented in a direct fashion and how the information is to be logically organized. It follows that for a well thought out data base management system, one that can expand in a graceful fashion, the formulation of an appropriate data model should precede that of the actual data base system design. Thus, the field of data models has an important role to play in the design of such systems. In this paper, the beginnings of a data model for an integrated pictorial data base management system will be formulated. The notion of such a system is one in which the pictures do not merely represent an appendix to a classical textual data base but are integrated with the alphanumeric information. By this we mean that the query language itself and ah query processing steps, including query optimization, should utilize iconic as well as textual information.
Gray Scale Simu&t~~ a Color Display. A. R. GOURLAY.
π SIMILAR VOLUMES
## Abstract Costβeffectiveness acceptability curves have become a common way of presenting the results of probabilistic sensitivity analysis. However, these curves do not provide information on what the loss of welfare or net benefit (NB) is for cases where a given intervention is not the optimal o
## Abstract Interest in the use of net health benefit in costβeffectiveness analysis derives from its optimality property for decisionβmaking. A description of the results of an economic evaluation of health care interventions is incomplete if it does not include point and interval estimates of thi