We have prepared superconducting Bi-Pb-Sr-Ca.Cu-O thin films by RF magnetron sputtering technique, on heated MgO(100) substrates. Sputtering was carried out in a mixture of argon and oxygen(10%) and the pressure was maintained at 5 mTorr during deposition. The substrate temperature was maintained 400℃ during deposition. The films sputtered were amorphous and insulating. All the films became superconducting by annealing, The films annealed at 880℃ for 30 minutes in air showed high-Tc phase with zero resistivity of 93K. These results indicate that the growth of the high-Tc phase is promoted by the presence of Pb at annealing temperature.

The trimethylamine-sensing characteristics of ZnO based thin film semiconductors and the sensitivity enhancement by squttering conditions have been investigated to develop a new type sensor for detecting fish freshness. The sensor fabricated with a 300nm of ZnO thin film with 4 wt% Al sub(2) O sub(3) and 1 wt% TiO sub(2) exhibited the highest sensitivity of 155 at 300℃ of working temperature and to the 240 ppm TMA gas. Deposition of ZnO thin film using a RF magnetron sputter was carried out at a pressure of 10 super(-2) Torr in pure oxygen gas with an RF power of 100W. The sensor exhibited a large response to the actual gases produced by a mackerel at an early stage of decomposition.

In this paper, a method of ghost cancelling for the television signals using complex adaptive filter is studied. The sin(x)/x signal is used as the reference signal a complex adaptive filter. The ghost cancelling characteristics considering the delay time, the attenuation, and the phase difference of multipath waves are investigated using horizontal sync pulse and color burst signal in composite video waveform. The influences of phase difference in ghost cancelling are investigated and the performances between the real processing and the complex processing are compared by the computer simulation. It was found that influences in ghost by phase difference are remarkably reduced by the complex adaptive filtering.