An advanced fuzzy logic control scheme has been proposed for micro-computer based power system stabilizer (PSS) to enhance the stability of power systems. In the proposed control scheme, additional integral information of generator speed is taken into account to enlarge the stability region together with propotional and differential information of generator speed. Namely, the advanced control rules are based on the PID information of generator speed. Various simulations have been performed subject to several types of large and small disturbances using a one-machine and an infinite-bus model system. In addition, comparison studies have been made between a conventional analog-type PSS and the fuzzy logic PSS. The results show that the stable region of the study system is highly enlarged up to the physically stabilizable boundary by the proposed fuzzy logic control scheme.

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The mechanical properties and aging processes were investigated for the Al–2%Si casting alloy containing various amounts of magnesium from 0.3 to 1.0%. The specimens were solution treated at high temperature and aged isothermally at the temperatures ranging from 418 to 473 K. Electrical resistivity measurement and differential scanning calorimetry showed that the formation of cluster increased with increase in magnesium content in the early stage of aging and the following aging processes were retarded by the formation of cluster. The peak value of proof stress and the aging time giving a peak value increased with increase in magnesium content. The elongation to fracture and absorbed energy of the specimens containing 0.6% Mg or more decreased remarkably, resulting from a crystallized Mg₂Si particle existing in the eutectic portion. Both fracture elongation and absorbed energy were larger for Al–2%Si–0.3%Mg alloy than for AC4CH alloy.

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制ガン剤としての表題化合物Vの合成を試み,N-置換エタノールアミンとブロムアセタールからIIIa～IIImを合成し,IIIを塩化チオニルで塩素化してVを得た。IIIの合成の際,その方法により環化したN-置換-2-アルコキシモルホリン(IV)が生成された。またVの合成時もしくはIIIかVをピクリン酸やピクロン酸で処理した場合にもIVが生成される場合がある。遊離のVは不安定で,長時間室温放置もしくは加熱により二量化してピペラジニウム塩(VI)を形成し,VIは水酸化カリウムにより相当するエチレンジアミン(VI)とアセチレンに分解する。

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Effect of pre-aging conditions on T5 heat treatment behavior of Al–9.0%Si–0.3%Mg die-casting alloy was investigated by using hardness measurement, differential scanning calorimetric analysis (DSC) and transmission electron microscopy (TEM). T5 treated alloy showed the positive effect on the two-step aging at pre-aging temperatures between 273 and 343 K, unlike T6 treated alloy which showed the negative effect at pre-aging temperatures below 343 K. The positive effect on two-step aging seems to be the characteristic behavior at T5 heat treatment. Difference of two-step aging behavior between T5 and T6 treatments seems to result from the difference of cluster (1) formed in the pre-aging process below 343 K. Higher water-quenching temperature after casting tended to increase the hardness after artificial aging.

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Ciclacillin (Aminocyclohexyl penicillin-ACPC, 以下ACPC) は, Ampicillin (以下ABPC) に類似の化学構造をもつ広域Penicillin剤であり, Penicillinaseに対する抵抗性が強く, 内服剤でありながらほぼ筋注なみの高い血中濃度が得られるという特徴がある2) 。一方, 試験管内抗菌力は, グラム陽性菌, グラム陰性菌ともにABPCの1/4～1/6程度であるという1) 。
今回, 私は, 臨床分離菌株に対するACPCの試験管内抗菌力を, ACPCと類似の抗菌スペクトルをもつ薬剤と比較検討をしたので, 以下報告する。

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Various kinds of sheets made of PVC are used as a finishing material for building. These used PVC sheets are dumped voluminously as mixture waste. So the development of recycling system of waste PVC sheets was studied in this paper. Fundamental physical property test such as tension, elasticity, etc. and durability tests were carried out on recycled PVC specimens. The influence of waste PVC compound mixing rate on the quality of recycled PVC sheet was confirmed through those tests. Consequently recycled PVC sheet is deemed applicable to use for the waterproofing sheets.

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東洋医学の考え方は、生体を小宇宙として総合的に捉えるとされている。現在、一般的に用いられている五行関係を理解するための五行関係図は、五行間のすべてを矢印により接続しているため、五行が関わり合う方向を示しているに過ぎず、全体の把握をしているとは言えない。これに対し、現代の工学系における制御理論では、複雑系を複雑系のまま理解するための理論が用いられている。
そこで我々はこの理論を用いて、五行関係を総合的に解釈するための試みとして、新しい五行関係モデル作成した。その結果、相生関係と相克関係とをドラスティックに変化するものとして捉えることができ、相生関係と相克関係を同時に理解し、五行全体の変化を如実に表現することができるようになった。この五行関係法則の基本モデルにより、今後疾病モデルの作成と治療理論の解釈ができる可能性が示唆された。

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