Many acute and chronic hepatic diseases are hard to diagnose, and some are also hard to cure. One of the reasons is that blood tests have become diversified and complex. There have also been cases that could not be diagnosed even after a histological examination of hepatic tissue. In this study we attempted to diagnose acute and chronic hepatic diseases using Mahalanobis-Taguchi adjoint method in Mahalanobis-Taguchi system. Useful results were obtained as reported.

The Rockwell hardness test is a method by which hardness (a quality characteristic) is evaluated. National hardness standards have been successfully set and standard samples have been produced. The purpose of this study is to make the test more meaningful in an engineering sense by replacing the standard quality characteristic with an evaluation of the indenting deformation process. Parameter design was performed on a combination of the testing conditions and the heat treatment conditions of standard samples of hardness, and it was shown that the deformation process varies with these two conditions. These results can now be used to explore the meaning of the characteristics of materials.