The commercialization of virtual reality (VR) platforms has enabled and increased interest in the use of VR for social activities. Users are now able to enjoy a shared experience with others in an immersive social VR environment. However, current methods for designing and measuring shared user experience (UX) have been insufficient. To design and measure VR UX in a consistent manner, it is essential to develop design guidelines and evaluation tools focusing on user interfaces and interactions. In this study, a new evaluation tool that can comprehensively evaluate VR is proposed, and its validity and reliability were verified. In addition, user tasks and activities in VR were defined for a variety of users, and VR scenario guidelines were developed. Finally, the difference in UX according to device type (PC vs. HMD) was identified. This study is expected to be useful for developing social VR scenarios and evaluation tools.

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In this paper we present a novel common-mode elimination technique for a 1V rail-to-rail CMOS amplifier. For 1V single supply voltage, the input signal compression technique ([1]) is used to avoid the dead zone of input stage. Before the conventional PMOS input amplifier, the original signal is processed by the common mode elimination block which is composed with signal compression block, signal inverting block and 4 resistors. After this common mode elimination block, the original common mode signal variation from 0V to 1V is compressed with about 3.7mV variation while the compression rate of differential signal is about 71.4%. With this technique, ultra high CMRR (min 115.1dB) is obtained with 43.3dB differential gain. Cadence SPECTRE simulator and TSMC 0.25-μm CMOS technology are used to simulate this work.

Inflatable Mouse is a volume-adjustable user interface. It can be inflated up to the volume of a familiar mouse, but be deflated and stored flat in a PC card slot of a laptop computer when not in use. Inflatable Mouse functions just like a typical mouse; moreover, it provides new interaction techniques by sensing the air pressure in the balloon of the mouse. It also addresses some issues associated with pressure-sensing interactions such as the lack of bi-directional input and the lack of effective feedback. Moreover, it can be used as both a control tool and a display tool. In this paper, the design of an Inflatable Mouse prototype is described and potential application scenarios such as zooming in/out and fast scrolling using pressure control are explained. We also discuss the potential use of Inflatable Mouse as an emotional communication tool.