Phenolphthalein method is utilized as the general diagnosis method on neutralization of concrete. However, this method cannot satisfy to indicate the soundness of reinforced concrete. In this research, the applicability of phenolphthalein method to the specific evaluation and prediction of neutralization was evaluated through the analytical and the experimental method. As a result, analytical estimation using image processing on pH distribution of cement hydrates was possible by multiple indicators: two concentrations of phenolphthalein solution and 0.4 % concentration of tropaeolin O solution. It was also clarified that visual inspection method using two types of indicator (1.0 % concentration of phenolphthalein solution and 0.4 % concentration of tropaeolin O solution) can give sufficient and accurate information about the relationship between the discolored pH and its depth from surface of concrete. Finally, new evaluation method was proposed for specific evaluation on neutralization of concrete considering the remaining neutralization time.
The actual hunting area and ranges of hunting activities of hunters using guns and hounds are clarified and the contribution of these hunting activities on the establishment of a forest-farmland buffer zone is examined. In this study, a hunting group from a suburban area in Ehime Prefecture, targeting Japanese wild boar is examined. The landscape factors affecting hunters travelling distance is also studied. As a result, the hunting group in this study focused their activities on narrow, 600 m-wide bands around settlement. In such cases, a habitat management effect peculiar to hunting with guns and hounds can also be expected, as it keeps wildlife away from settlements and in the process generates a buffer zone along farmland peripheries. The study also shows that the burden of movement on hunters is closely related to the elevation, road conditions and degree of farmland clustering of the hunting zones.