308size electronic paper device that can cover most official documents came into market and it supported handwriting with a digital pen. It seems to be suited for Abstract This paper explores how electronic paper should be used in office work in the future. Nine participants used an A4-size electronic paper device in their actual work. The results revealed that the electronic paper device is easy to handle as a device and it was well suited to support reading and writing activities which includes frequent hand-using actions such as moving, holding, and pointing to the device. However, participants felt difficulty in page navigation and overviewing documents and these features are inevitable to support document-related work in the office. To resolve this, we suggest that electronic paper should focus on its strengths and make other devices compensate for its weaknesses. In this framework, multiple devices support a single activity together by making use of strengths of each device. We also discuss three application domains: active reading, collaborative work using documents, and note-taking in the field.
An optical head and a fast laser power control electro-optics using short wavelength laser diode was developed. This laser power control method reduces much of the laser noise, and, at the same time, rapidly regulate the laser power in order to compensate for mark shape. The relative intensity noise of the laser, lasing at 670 nm, was reduced -127dB/Hz. This noise level is enough low to use the short wavelength laser diode for high density recording. This method is able to set various writing power waveforms to avoid mark distortion. The recorded mark shapes compensated by this method were simulated according to thermal analysis. And an experiment of mark shape compensation was made using a write once medium. Symmetric mark shapes were got in case of (1 ,7) mark edge modulation, the minimum mark length is 0. 8 j.tm. This high recording density is equivalent to 1 .7 bit/p.m.
Much emphasis is now being given to research and development of plant factories which daily produce a large volume of highquality vegetables under artificially controlled environments. One of the important issues to be considered for the management and the daily operations of the plant factories is to find a set of suitable customers and/or markets to which the daily produced vegetables are sold and delivered. The current wholesale markets of the vegetables are not suitable for trading the high-quality vegetables produced by the plant factories, therefore, a new market is required to sell and to buy the products made by the plant factories. A new trading market system is proposed, to sell and to buy the lettuces supplied by the plant factories, based on the stock exchange mechanisms, in this paper. An estimation method of yield rate is also proposed to generate a suitable volume of sales for the plant factories. Some case studies have been carried out to verify the effectiveness of the proposed trading market.
We have introduced and defined such electro-optical characteristic parameters as are specifically essential to a SBE LCD and useful for realization of a highly rnultiplcxed SBE LCD.The characteristic parameters are the hysteresis H, the steepness y*, and the cell thickness dependences K and L for threshold voltage and hysteresis, respectively.In order to increase the multiplexing capability in a SBE LCD, it is essentially needed to decrease the y* value as well as the H value and also to reduce both values of K and L.On the basis of the LC material and cell optimization through these characteristic parameters, we have developed a 11200 duty cycle multiplexed matrix SBE LCD with a high contrast ratio and a wide viewing angle.
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