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Although titanium is a very useful material and becoming more in demand, we are faced with difficulties in machining the material. By applying ultrasonic vibration to the tool tip, interrupted cutting can be applied. Using ultrasonic vibration-assisted cutting of titanium alloy, we succeeded in reducing the cutting force. This technology enables us to improve tool wear and surface roughness of the workpiece. In regards to cutting fluid supply methods, it was found that semi-dry cutting was the most suitable for ultrasonic vibration-assisted cutting of titanium alloy.

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Abstract. It is well known that the Fe based alloys can exhibit shape memory effect due to the y to E martensitic transformation. The effect may not be as striking as observed in the NiTi alloy but it might become attractive fkom the practical point of view. In this work, two compositions of Fe-Cr-Ni-Mn-Si(-Co) stainless steel based shape memory alloy, prepared by the VIM technique, will be presented. The results are good with shape recovery of 95% for a pre-strain of 4% after some training cycles. In terms of workability the alloys produced are worse than the usual AISI304. However, adjusting the thermo-mechanical processing, it is perfectly possible to produce wire as thin as 1,20mm in dia. or down.

The internal f r i c t i o n has been measured i n the martensitic phase of NiTi(Cu) alloys a t 1 Hz and 4 kHz. The d e t a i l e d study of the s t r a i n amplitude dependence of the internal f r i c t i o n and the whole spectrum as a function of the temperature i n the martensitic phase have a1 lowed t o a t t r i b u t e t o dislocations t h e main source of internal f r i c t i o n .

:International tourists in Japan are increasing year by year, and the Japanese government keeps promoting the tourism industry. In order to make Japan more attractive for tourists, the analysis of tourists' impressions is very important. One of the conventional approaches is to provide tourists with a questionnaire about sightseeing spots. However, the questionnaire has a problem, the memory of the interviewees fades and fine information cannot be obtained. In this paper, we describe a novel approach to detect the impression using information from electroencephalogram (EEG). Since the developed system makes use of a portable EEG device, it enables impression detection even if the subject is walking. In order to confirm the validity of the proposed system, we carried out both video-based and real-world experience of the typical sightseeing spots.

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