巻号一覧
9 巻, 6 号
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高木 幹雄1971 年 9 巻 6 号 p. 389-396
発行日: 1971/12/30
公開日: 2011/03/09
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三田村 好矩, 三上 智久, 菅原 宏見, 吉本 千禎1971 年 9 巻 6 号 p. 397-405
発行日: 1971/12/30
公開日: 2011/03/09
ジャーナル フリーAn optimally controlled respirator was developed so as to maintain arterial PCO2 constant. It has three main features : 1) ventilation is controlled by the patient's metabolic rate from continuously measured CO2 output, 2) physiologic dead space approximated as a linear function of tidal volume is used to estimate alveolar ventilation, and 3) respiratory rate is computed to minimize ventilatory work.
The control system of the respirator was designed, subject to the analytical results of the ventilatory response of the man-respirator system obtained with a digital computer.
Anesthetized dogs were ventilated by the respirator for periods exceeding 24 hours. Arterial PCO2 and PO2, were maintained within permissible ranges.
The respirator was applied to dogs when the metabolic rate was changed by intravenous CO2 loading. Arterial PCO2 returned to the original level within 10 minutes after the CO2 loading began. Following initial CO2 loading, the arterial PCO2 was observed to exceed the normal range for about three minutes. After the CO2 loading stopped, arterial PCO2 decreased slightly and then increased to the same level as before CO2 loading.抄録全体を表示PDF形式でダウンロード (1467K) -
磯 泰行, 矢鳴 虎夫, 中山 泰雄1971 年 9 巻 6 号 p. 406-412
発行日: 1971/12/30
公開日: 2011/03/09
ジャーナル フリーMathematical expressions are derived for the probability density functions (pdf's) of the pulse intervals of the Poisson pulse trains which are density modulated by two kinds, of modulating signals, i. e., periodic signals and random telegraph signals. The pdf's are calculated and illustrated in both cases for several parameter values of the modulating signals.
In the case of a periodic modulating signal, the pdf is represented as the product of a periodic function and an exponential function, while, when the modulating signal is a random telegraph signal, the pdf is represented as the sum of two exponential functions.
Poisson pulse trains which are density modulated by a kind of continuous random signal with the known property are generated by the computer simulation method. The pulse interval histograms, the serial correlation coefficients (scc's) of pulse counts, and the scc's of pulse intervals are calculated and illustrated for several sets of parameter values of modulation signals.
One of the scc's of pulse counts is compared with the autocorrelation function of the corresponding modulating signal, and it is shown that the former can be used as the estimate of the latter.抄録全体を表示PDF形式でダウンロード (968K) -
鈴村 宣夫, 池谷 和夫1971 年 9 巻 6 号 p. 413-419
発行日: 1971/12/30
公開日: 2011/03/09
ジャーナル フリーSeveral problems on the phonocardiographic microphones are investigated. A tentatively made condenser microphone used for phonocardiography is discussed briefly at first. Then, the characteristics of several types of air cavity of phonocardiographic microphone are discussed rather in detail by calculating their acoustic fields and measuring them with a probe tube microphone. Two sorts of microphones, condenser and moving coil, are considered in these calculations.
Next, the vibration sensitivity of the phonocardiographic microphone is discussed. Its measured values are compared with theoretical ones. A few dBs of differences appear in some frequencies, but the tendencies of two curves are in good agreement. The sensitivity of the microphone to the room noise is investigated finally. The ways how the room noise reaches the microphone are also discussed.抄録全体を表示PDF形式でダウンロード (1092K) -
山田 英智1971 年 9 巻 6 号 p. 420-425
発行日: 1971/12/30
公開日: 2011/03/09
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増原 英一, 今井 庸二1971 年 9 巻 6 号 p. 426-431
発行日: 1971/12/30
公開日: 2011/03/09
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唄 孝一1971 年 9 巻 6 号 p. 432-433
発行日: 1971/12/30
公開日: 2011/03/09
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入内島 十郎1971 年 9 巻 6 号 p. 434-435
発行日: 1971/12/30
公開日: 2011/03/09
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1971 年 9 巻 6 号 p. 436-439
発行日: 1971/12/30
公開日: 2011/03/09
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1971 年 9 巻 6 号 p. 441-442
発行日: 1971/12/30
公開日: 2011/03/09
ジャーナル フリーPDF形式でダウンロード (451K)
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