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The electronic spectra of meta-substituted phenols ( -fluorophenol, m-chlorophenol, and m-cresol) and fl-naphthol in supersonic free jets have been investigated. All the molecules studied exhibit two strong features in the fluorescence excitation spectra, which are due to two rotational isomers in which the hydrogen atom of the OH group is in cis and trans configurations with respect to the meta substituent. The difference between the S]-S0 excitation energies of the two isomers is in the range from 100 to 300 cm-1. This larger difference indicates the potential for electronic spectroscopy to discriminate between the rotational isomers. The dispersed fluorescence spectra of the molecules as well as the electronic spectra of the hydrogen-bonded complexes provide definite evidence for the existence of the two isomers. The hindered internal rotation of the CH3 group in m-fluorotoluene and m-cresol is also briefly described.

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A centrifuge injector that repetitively fires 1.3 mm deuterium pellets (1 torr • L per pellet) at a rate of 32 pellets per second was used to build up and maintain a Doublet III 2.4 MW neutral-beam-heated limiter discharge at a line-averaged density of 1 X 10 14 cm" 3 . When compared to a conventional gas-fuelled plasma at similar density, the pelletfuelled plasma was characterized by a factor-of-three reduction in edge neutral density and limiter recycling, a centrally peaked profile, a 70% increase in global energy confinement, and a tenfold increase in the fusion reaction rate.

Line-of-sight (LOS) information acquired from the eye is quite valuable in information communication technology (ICT). LOS detection systems that do not impose physical or psychological stress are strongly demanded.In this study, we fabricated and demonstrated a wearable LOS detection system that consists of micro-fabricated transparent optical sensors affixed on eyeglasses. The sensor array detects the difference in the intensity of light reflected from the pupil and the white of the eye (sclera) and then determines the view angle. The system is also equipped with a CCD camera to acquire the user's field-of-view (FOV) to deduce the LOS by using the detected view angle. This paper first presents the shapes and arrangement of the array of four cells on the eyeglasses. With only four sensor cells, we can detect the view angle in both the horizontal and vertical directions. We describe the LOS detection system and show experimentally that the error is as small as 1.5°. In addition, we deduce the characteristic output signals of the cells when the user blinks. Eye-blinking can be used as a trigger to initiate LOS measurement, select objects, etc. Finally, we successfully demonstrate the effectiveness of the proposed system to detect a user's LOS in applications that include the selection of objects to express the user's intent and tracking the point of regards to deduce the user's interest.