A high-speed adder using Gunn diodes Kataoka, S.; Komamiya, K.; Morisue, M.
Proceedings of the IEEE,
1971-Oct., Volume:
59, Issue:
10
Journal Article
Peer reviewed
A high-speed adder employing Gunn diodes is proposed. The system is constructed by using the threshold logic technique for high-speed carry propagation. Since all inputs of n stages with each weight ...are simultaneously applied to the anode of each Gunn diode to generate the nth carry at once, the operating speed of the adder should be considerably improved.
Aqueous solution of phenol was allowed to react with molecular oxygen at a pressure less than 2.1 MPa, in the presence of copper (II) sulfate (280 and 560 mg/l as Cu2+) and at 130-220°C. The extent ...of decomposition of phenol at below 2.1 MPa was more than 95% upon heating it for 70 minutes at above 180°C. After the treatment, a transparent solution was obtained. The extent of decomposition at 1.1 MPa and above 180°C showed a tendency to decrease with increasing temperature because phenol probably reacted with oxygen in a gas phase. Phenol did not appreciably reacted in air at 2.1 MPa and above ca.200°C; the extent of decomposition was about 60%. The CODmn values of the solution after the treatment were also measured.
Magrecter KOMAMIYA, YASUO
Journal of the Instrument Technology, Japan,
1959, Volume:
9, Issue:
7
Journal Article
Open access
Proposed in this paper is a "Magrecter", a non-contact electronic relay as a new switching component. Magrecter which utilizes magnetic rectifying phenomena is constructed by setting pieces of ...semiconductor in the gap of magnetic control circuit (See Fig. 5). It has the following characteristics: (1) The primary side (side to control) is completely separated from the secondary side (side to be controlled), or the primary side circuit conditions are not influenced by the secondary circuit conditions. This is very important when the switching circuits are designed by using magrecter. (2) Many switching elements (semiconductors) can be mounted on a magrecter and the elements can be used either as a make contact or as a break contact in accordance with the connecting direction of each element. (3) Magrecter is an active switching component. Any desirable switching circuit can be designed only with magrecters without using any other elements i.e. condenser, resistor, inductance coil and even amplifier, etc. (4) Switching speed is rather high and yet it is likely to become higher (about 100kc to 1mc) in future. (5) Power consumption is rather less. (A few milliwatts to 1 watt) (6) Reliability, stability and life are expected to be same as those of other semiconductor elements. (7) Simple structure, easy manufacture and inexpensive cost. In general, magrecter is expected to be used soon in the switching circuits for automatic control, electronic switchboard and electronic digital computer. For this purpose, experiments are being forwarded at present to find out what semiconductor is most suitable for magrecter. In this paper, theory and design of magrecter are described.
Accident risks in waste treatment in Japan were studied from our original database of 600 incidents. It was found that many types of incidents occurred in several processes of the waste treatment and ...30% of incidents resulted in fatal accidents with relation to collection and transport of waste, or maintenance of facilities. A case study of the hazards in waste treatment showed the risk of reaction by mixing.
A super-Schottky contact diode made of Nb on heavily doped p-GaAs has been fabricated by electron-beam deposition under high vacuum, resulting in a long life and very reliable characteristics with ...estimated detector current responsivity S≃1500 V -1 and NEP ≃ 1.2 × 10 -15 w/√HZ at 4.2 K under optimum bias conditions.
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