検索結果 2449 件
| 著者 | 小坂田 和| |
|---|---|
| 発行日 | 1979-06-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 91巻 |
| 号 | 5-6号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 大橋 茂| |
|---|---|
| 発行日 | 1979-02-28 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 91巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 岡本 全允| |
|---|---|
| 発行日 | 1979-02-28 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 91巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 橋本 啓二| |
|---|---|
| 発行日 | 1982-04-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 94巻 |
| 号 | 3-4号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 古谷 生| |
|---|---|
| 発行日 | 1984-08-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 96巻 |
| 号 | 7-8号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 森田 啓次郎| |
|---|---|
| 発行日 | 1984-04-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 96巻 |
| 号 | 3-4号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 依光 幸夫| |
|---|---|
| 発行日 | 1985-08-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 97巻 |
| 号 | 7-8号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 森近 豊| |
|---|---|
| 発行日 | 1985-04-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 97巻 |
| 号 | 3-4号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/OER/16070 |
|---|---|
| タイトル（別表記） | Evaluation Method of Total Risk and Additional Private Risk of Investment Project −Investment Criteria for Companies Considering Stakeholders Interest− |
| フルテキストURL | 41_2_021_038.pdf |
| 著者 | 小山 泰宏| |
| 抄録 | 機関投資家が資産運用としての証券投資を評価する場合と異なり、企業が事業投資を実施するかどうかの意思決定を行う場合、市場リスクのみをリスクとして評価するのは企業の実情に添わない。たとえば、企業の規模に比較し、取り上げる新規案件の規模が非常に大きく、仮にその案件が失敗した場合に企業自体の存立も危うくなるような場合、市場リスク以外に案件が抱える総リスク（total risk）の評価も重要な意思決定上のポイントとなるであろう。特に主要株主が分散投資していない集中投資家やオーナー経営者である場合、あるいは日本企業のように企業に経営資源をコミットしている経営者や従業員等の利害関係者（stakeholders）の立場も考慮している場合には、事業投資の意思決定を行う際、市場リスク料に追加個別リスクも含めた総リスクを評価して意思決定を行うことが求められるであろう。総リスクに含まれる追加リスク料としては、例えば、企業規模に伴うリスク料、業界別リスク料、カントリー・リスク料等が指摘され、実証的な計数化や検証がなされてきている。リスク評価の方法としては、リスク料をリスクフリー・レートに追加したリスク調整割引率で期待キャッシュフローを割り引いて現価を求める方法と、期待キャッシュフローからリスク額を控除した確実性等価を求め、リスクフリー・レートで割り引いて現価を求める方法がある。前者の方法は「リスク調整割引率法」であり、実務では「Build−up法」や「追加リスクを加えたCAPM 法」が用いられている。後者の方法は「確実性等価法」であり、理論的には前者よりも優れているとされるが、実務ではあまり採用されていないのが実情である。この研究ノートでは、①リスク調整割引率法で割引率に追加する追加リスク料と、確実性等価法で控除される個別リスク額の相互の関係を検討し、案件評価における両手法の互換性を検討した。また、②実務上必要となる、追加個別リスク料の見積もり方についての検討も行った。最後に、③利害関係者を重視した企業の事業投資の意思決定または評価基準についての検討も行った。 |
| 出版物タイトル | 岡山大学経済学会雑誌 |
| 発行日 | 2009-09-10 |
| 巻 | 41巻 |
| 号 | 2号 |
| 開始ページ | 21 |
| 終了ページ | 38 |
| ISSN | 0386-3069 |
| 言語 | 日本語 |
| 著作権者 | 岡山大学経済学会 |
| 論文のバージョン | publisher |
| NAID | 120002306466 |
| 著者 | 小野 波津子| |
|---|---|
| 発行日 | 1987-06-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 99巻 |
| 号 | 5-6号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/15829 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_21_1_17.pdf |
| 著者 | Akagi Fumio| Osaki Hirokazu| |
| 抄録 | Assembly line balancing is to assign work elements to serial work stations so as to make the work content at each station as close as possible to one limiting cycle time or pitch time, i.e., an upper time limit over every station. Until now, it is usually assumed that the performance rates of work stations are constant. But in practice the performance abilities of workers, machines or robots are varied by their own working conditions. Then the actual station times are different from standard ones, and consequently the line balance may diminish in many cases. Therefore in this paper, we propose an improved balancing method, in which work elements can be assigned to the work station having the upper time limit changed by its performance rate or ability. Further we develop the computer program of the proposed method and provide an illustrative problem and computational results. In an application of our method to the practical problems, it is shown that the actual efficiency of the production line becomes near that planned. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1986-11-15 |
| 巻 | 21巻 |
| 号 | 1号 |
| 開始ページ | 17 |
| 終了ページ | 30 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307409 |
| JaLCDOI | 10.18926/15828 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_17_2_15.pdf |
| 著者 | Tanada Yoshihiro| Sano Hiroya| Xu Hai| |
| 抄録 | Optical-fiber multi-level PCM transmission system is investigated on the transmission distance and bit rate. A communication channel is established as follows: a light signal is modulated in intensity with a completely-balanced M-Ievel code at a transmitter, and is propagated over an optical glass fiber, and is demodulated at a receiver where the signal with an additive noise is processed through a PD, an equalizing amplifier, a matched filter, (M-l) comparators and a decision circuit. The relative power of the noise from the amplifier is increased in accordance with the reciprocal of fiber's transmittance, where shot noise and thermal noise are smoothed and decreased in power by the matched filter. The relation between the BER and the SNR leads the transmission distance. The product of the transmission distance and bit rate takes the large maximum at the large values of SNR and M. The large value of M is suitable for low-speed and high-rate system, and the interference system. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1983-06-30 |
| 巻 | 17巻 |
| 号 | 2号 |
| 開始ページ | 15 |
| 終了ページ | 29 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307714 |
| JaLCDOI | 10.18926/15816 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_17_1_15.pdf |
| 著者 | Himei Toyoji| Nakanishi Sen-ichiro| Funabiki Shigeyuki| Komatsubara Hitoshi| Kurose Osamu| |
| 抄録 | An ac phase control circuit by thyristor is widely used in industry, The characteristics of the singlephase circuit with series RLC elements are numerically analyzed, and is reported the interesting phenomenon of step-up voltage without transformer. However, the performance of three phase phase control circuit with series RLC elements is not made clear. In this paper, the performance of three-phase control circuit of a balanced and an unbalanced load with series RLC elements is described. The analytical programs with each load are developed, and it is clarified that the calculated by this analytical program agree well with the measured. The calculated results, e.g. waveforms, RMS values of voltage and current, power, and power factor are illustrated and discussed the step-up phenomenon in three phase. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1983-02-25 |
| 巻 | 17巻 |
| 号 | 1号 |
| 開始ページ | 15 |
| 終了ページ | 40 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307185 |
| JaLCDOI | 10.18926/15815 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_20_2_1.pdf |
| 著者 | Miyahara Toshiro| Takahashi Teruo| |
| 抄録 | Bubble columns are extensively used in the chemical industry. This paper evaluates the present state of the art on the size of bubbles from a sieve plate and gas holdup, mainly on the basis of the results of the authors, including previous ones. The size of bubbles formed from a sieve plate has an insignificant effect of chamber volume, and gas holdup shows some different behavior, depending on the hole diameter to liquid depth. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1986-02-28 |
| 巻 | 20巻 |
| 号 | 2号 |
| 開始ページ | 1 |
| 終了ページ | 20 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307288 |
| JaLCDOI | 10.18926/15809 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_2_45.pdf |
| 著者 | Funabiki Shigeyuki| Iyasu Masakatsu| Kamura Tsutomu| Himei Toyoji| |
| 抄録 | In this paper, the analysis of transient performance of two-phase induction motor driven by a voltage source inverter with current limiter is described. The motor is represented by using a two-axis model, that is, the Kron primitive machine. The state equations of mechanical-electrical system are derived. The calculation method with a discrete point of time is employed in order to decrease the CPU time of computer. The calculated results gained from this method agree well with the measured. Then, with the aid of this analytical method, the discussions on transient performance of this system are also performed. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-29 |
| 巻 | 16巻 |
| 号 | 2号 |
| 開始ページ | 45 |
| 終了ページ | 58 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307761 |
| JaLCDOI | 10.18926/15807 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_2_31.pdf |
| 著者 | Himei Toyoji| Nakanishi Sen-ichiro| Funabiki Shigeyuki| |
| 抄録 | The influence of magnetic saturation of iron-core on the performance of thyristor phase control circuit with series RLC elements is described. The circuit is analyzed by applying an approximate model of three straight lines to the flux Φ vs. current i curve of the iron-core reactor. And the influence on waveforms, r.m.s. values, power factor and response are discussed. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-29 |
| 巻 | 16巻 |
| 号 | 2号 |
| 開始ページ | 31 |
| 終了ページ | 43 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307371 |
| JaLCDOI | 10.18926/15806 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_2_17.pdf |
| 著者 | Himei Toyoji| Nakanishi Sen-ichiro| Funabiki Shigeyuki| |
| 抄録 | The phase control characteristics in a thyristor phase control circuit with parallel resonance elements indicate very interesting phenomenon. Several extreme values appear on the phase control curve. The phenomenon is different from the step-up one in a thyristor phase control circuit with series RLC elements which is interpreted as series resonance. To comprehend the circuit performance with those loads, it is necessary that the phenomenon on extreme value is physically clarified from other viewpoints. In this paper the performance in this circuit is studied from two viewpoints of a natural oscillation and a parallel resonance. Then, it is found that the performance depends on a natural frequency in thyristor conducting period and a parallel resonance frequency in thyristor non-conducting period. Therefore, the interesting phenomenon on extreme value is affected by the alternative of natural frequency or parallel resonance frequency. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-29 |
| 巻 | 16巻 |
| 号 | 2号 |
| 開始ページ | 17 |
| 終了ページ | 29 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307189 |
| JaLCDOI | 10.18926/15803 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_1_147.pdf |
| 著者 | Taniguchi Takeo| |
| 抄録 | Renumbering algorithms commonly in use for the band solver are generally applicable for any kind of linear equations, and, therefore, we may say that they cann't effectively utilize the characteristics of the finite element mesh. In this paper we investigate the characteristics of the finite element mesh systems, and introduce them into Taniguchi-Shiraishi Algorithm which already introduced some properties of FEM mesh systems. And through several numerical experiments it is proved that this improved algorithm is one of the fastest one. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-01 |
| 巻 | 16巻 |
| 号 | 1号 |
| 開始ページ | 147 |
| 終了ページ | 159 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307533 |
| JaLCDOI | 10.18926/15801 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_1_125.pdf |
| 著者 | Inouye Hiroshi| Oda Shinji| |
| 抄録 | A system dynamics model to forecast future movements of a city was studied. The model consists of three sections of population sector, industry sector, land use sector and some divisions of labor, income employment, housing land which connect each sections. Economic growth rate, public investment program, housing land supply program were incorporated in the model as political variables. The model was applied to Okayama city for thirty years from 1975 to 2005. The results of the simulation are summarized as follows: 1) The drift of peoples into Okayama city will advance in the future. 2) Tertiary industries will be given much weight as compared with secondary industries. 3) Because of the drift of peoples, housing problems will be serious in the future. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-01 |
| 巻 | 16巻 |
| 号 | 1号 |
| 開始ページ | 125 |
| 終了ページ | 145 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308014 |
| JaLCDOI | 10.18926/15797 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_16_1_91.pdf |
| 著者 | Nago Hiroshi| |
| 抄録 | In this paper the vertical distribution of pore water pressure in the highly saturated sand layer under the oscillating water pressure are treated theoretically and experimentally. By the experiments it is shown that the water pressure acting on the sand surface propagates into the sand layer with the damping in amplitude and the lag in phase, and that the liquefaction, the state that the effective stress becomes zero, occurs under certain conditions. These experimental results are explained fairly well by the same theoretical treatment as for the ground water problems in the elastic aquifer. The main characteristics of liquefaction clarified by the analysis are as follows. 1) The depth of the liquified layer increases with the increase of the amplitude and the frequency of the oscillating water pressure. 2) The increase of the volume of the water and the air in the layer increases the liquified depth. Especially the very small amount of the air affects the liquefaction significantly. 3) The liquified depth decrease rapidly with the increase of the compressibility coefficient of the sand. 4) In the range beyond a certain value of the permeability coefficient the liquified depth decrease with the increase of the coefficient. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1982-03-01 |
| 巻 | 16巻 |
| 号 | 1号 |
| 開始ページ | 91 |
| 終了ページ | 104 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307671 |