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••• In this study, we used romputer simulation to investigate changes in the romposition of hexagunal barium furrite films deposited by a facing ~t sputtering. The iron content in the film increased as the sputtering gas pressure increased and reached a maximum value at a certain gas pressure. These changes in the film composition were explained as fullows; sputtered particles scatter when they rollide with sputtering gas atoms, and this scattering changes a ratio of the particles reaching the substrate. When the substrate was located to the side of the target as in a facing target sputtering system, this scattering resulted in an increase in the amount of sputtered particles arriving at the substrate, although too much scattering caused the amount to decrease. Since this gas scattering depends significantly on the atomic mass of the sputtered particles, the gas pressure dependence of the amount of the iron atoms arriving differs considerably from that of the amount of barium atoms arriving. This di:ffurence leads to the changes in film composition

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Advanced light distribution control technology of the headlamp has developed and it is becoming possible to present information to the driver by graphics on the road surface as well as forward irradiation by ADB. On the other hand, the effect of presenting risk information by the function of the advanced headlamp on driver's behavior is not clear. In this study, we set various irradiation patterns of headlamp on the driving simulator and conducted experiments on collision avoidance behaviors at night. As a result, it was confirmed that the brake reaction time of drivers presented risk information by the headlamp to the road surface was shorter than drivers without presenting information. Also, we found that drivers perform brake operation more strongly by presenting rectangle-line based on the stopping distance algorithm on the road surface. Presentation of rectangle-line indicating the braking distance seems to reduce the frame line from the front of drivers, it was confirmed that this presentation method was easily recognized as a warning by drivers. Furthermore, the probability of collision against the obstruct was determined by data simulation based on the driving operation data obtained in the experiment, and it was found that the probability of collision decreases due to the risk information presentation.