It is thought that many primary school girls and female junior high school students are interested in a love story in a comic book, a novel, a TV drama, or a movie. In addition, they are interested in handcrafts and fashion. Therefore we make them express the performance of the scene of HYAKUNIN-ISSYU and MANYOUSYUU which are traditional Japanese language culture by using the microcomputer-controlled crafts. Through the students' creative activities of art design, we make them interested in electronic work, engineering, traditional culture and physical science course. This will be a teaching material of logical communication to put one's ideas across.

Diamond like carbon (DLC) films were deposited on the silicon substrate using the dense plasm focus (DPF) device. The intense pulsed ion and electron beams, emitted from the DPF device with hydrogen as filling gas at 300 Pa, have been used to ablate the graphite target depositing DLC films. The deposited samples were analyzed for their hardness, structure and chemical composition by nano-indenter, X-ray diffraction and Raman spectroscopy, respectively. Raman studies verified the formation of DLC films with D and G peaks. Raman spectra indicated that samples deposited by the electron beam ablation possessed higher sp³ content. Studies of film plastic hardness with a nano-indenter found that the DLC films deposited by the electron beam ablation have three times higher mechanical hardness than those by the ion beam ablation. Hardness results were in good agreement with Raman results.

A laser trigger system has been introduced to a pulse power system composed of counter-facing plasma focus electrodes in order to make high energy density plasma. Lithium plasmas made by a YAG laser ablation were used for both triggering the plasma focus and supplying the source of the high energy density plasma. Also the supply system of plasma source has been improved for stability and repeatability of the device. Operational principle of the device, details of the configuration, and basic characteristics of the triggering system are shown together with possible applications of the device.

Non-equilibrium atmospheric-pressure plasmas have been utilized for various technological applications such as materials processing, biomedical and biological applications, etc. In this paper, the influence of impurity nitrogen concentration on the fundamental properties of rf-driven non-equilibrium atmospheric-pressure helium plasmas was examined using a spatially one-dimensional fluid model, based on the continuity equations for charged and neutral species, the electron energy conservation equation, and the Poisson equation. The simulated I-V characteristics were in good agreement with the experimental ones, qualitatively and quantitatively. From the impurity nitrogen concentration dependence of the discharge sustaining voltage for constant input-power density, it was clarified that the certain value of impurity nitrogen concentration plays an important role in reducing discharge sustaining voltage.

The iron loss of an electrical steel sheet increases by compressive stress. The major factors of this phenomenon are reported to be the increase of the hysteresis loss and the abnormal eddy current loss. To evaluate the abnormal eddy current loss, we have to know the accurate classical eddy current loss because the abnormal eddy current loss can be calculated by taking difference between the total eddy current loss and the classical eddy current loss. In this paper, for accuracy improvement, we report the evaluation of the classical eddy current loss considering the skin effect change depending on the permeability change caused by applied compressive stresses.

In this study, we have attempted to synthesize the Gallium-implanted diamond-like carbon (DLC) film for new functional devices as substituting Si based materials. Intrinsic-DLC films (energy gap: 1.45eV) were deposited by the ionization vapor method with applying the negative pulsed-bias voltage (frequency: 2kHz, duty ratio: 30%, peak voltage: 500V) to SiO₂ substrates. Gallium (Ga) atoms were implanted to i-DLC films as accepters utilizing by focused ion beam irradiation system. The Raman scattering spectra of i-DLC and Ga-DLC films showed typical DLC characteristics which consisted of I(D) and I(G) peaks. In order to evaluate working function of the Ga-DLC film, several electrode materials (Au, Pt, Cu, Al and Sn) were deposited on the films. Current-voltage characteristics of Au and Pt electrodes on Ga-DLC films showed Ohmic-contacts, and Cu, Al and Sn electrodes were Schottoky-contacts. These results suggested that a work function of the Ga-DLC film was in the range of 4.47eV to 4.58eV. To apply these contact properties to DLC semiconductive devices, we produced the DLC Schottoky-diode using Al and Pt electrodes deposited on the Ga-DLC film. A current-voltage characteristic of DLC Schottoly-diode showed diode property which amount of a forward voltage and a backward voltage were 7.0V and 17.0V respectively. The ideality factor n of produced diode was 11.3.

This paper provides electrical and dielectric properties of artificial snow produced at a defined condition in a climatic chamber. Complex impedance of the artificial snow block was measured varying its Liquid Water Content (LWC). An equivalent circuit of the electrode system was also discussed. It was revealed that the complex impedance of artificial snow decreased with increasing LWC. Moreover, it was suggested that the change in LWC would provide a change in dielectric properties of artificial snow depending on the source frequency.

Measurements of discharge currents caused by the sparks between parallel disc electrodes with a micro-gap were conducted at a charge voltage of 500 V in order to estimate the corresponding spark voltages and spark currents, which were verified by using a spark resistance formula.