Usually periodic behaviour can be hardly seen in quasi-periodic oscillation, r₁ cos ω₁tr₂ cos ω₂t, when ω₁/ω₂ is not simple rational number, however we succeed in finding out new type oscillatory behaviour of it in the point at which the amplitude is extremum.

Hitherto obtained results on the qualitative behaviors of nonlinear dynamical systems are applied to MOS digital circuits, and a class of these circuits is shown to have some monotonic properties such as nonnegativity-preservation, isotonicity, and monotone convergence to a dc solution.

On the basis of a nonnegative and a monotonic property of the solution of a special class of differential equations, the transient responses of a class of MOS digital circuits are proven to have a monotone sensitivity with respect to some transistor parameters.

Noise behavior of the injection locked IMPATT amplifier with antiphase self-injection is investigated experimentally. The noise performance of this amplifier, which has wider locking range and faster phase response than ordinary one's, is not at all inferior to that of ordinary one's.

This letter reports the optical Waveguide of KDP-DKDP mixed crystal grown on the {101} plane of DKDP crystal by the LPE technique. The propagation loss of the waveguide is 0.5 dB/cm for the TM modes.

A theoretical prediction that the lasing gain must increase by breaking the electrically neutral condition in the active layer is given. A possible structure to give a very low threshold current less than 1 mA was discussed.

This paper describes a basic theory and the experimental results of a RCC (Ringing Choke Converter) in which a MOS FET is used as the switching element and the driving circuit has been modified to improve the efficiency and the characteristics under no-load conditions.

We found that the ultrasonic irradiation induced significant but reversible changes in the excitation level of neurones in the central ganglia of a marine molluse, Aplysia. The experiments indicate the potential applicability of ultrasonics as a means of non-invasive stimulation for a selected area of the central nervous system.

This paper presents a periodic sampling queueing model with (active) processing/interruption phases, Poisson arrivals and a generalized processing probability in accordance with the number of customers at sampling points. The generating functions of the number of customers in a system immediately following sampling points are obtained from the existing results of a generalized periodic sampling model. Using these functions, generating functions of the number of customers at arbitrary points are formulated for active processing and interruption phases. Performance measures such as average customers in a system and average waiting time are derived. Formulas for a single processor model are tailored for a specific application to a common channel signaling system shared between call signals and database information signals. Numerical examples for this system are presented as a guide for the traffic design regarding the ratios of active/interruption phaese and sampling preiod/average processing time.

This paper describes a highly sensitive optical fibre interferometric vibration sensing system. The system is capable of measuring three dimensionally high frequency mechanical vibration amplitudes down to the order of 0.1-0.01 Å at frequencies ranging from 10 kHz up to 30 MHz. The system is stabilized by a unique feedback compensation scheme against phase variations appearing in two interfering light beams due to various disturbances. Use of this scheme has hence realized highly sensitive semiautomatic scanning measurements.