result 24410 件
| JaLCDOI | 10.18926/OER/40512 |
|---|---|
| Title Alternative | The Globalization and the Transformation of Auto Parts Suppliers in the Chugoku Region : The Effects of Global Sourcing and the Module Manufacturing System |
| FullText URL | oer_037_3_001_011.pdf |
| Author | Ohno, Takeshi| |
| Abstract | In the age of intense global competition, many Japanese auto makers have overhauled the Keiretsu, the long−term and strong tie between an auto maker and its parts suppliers. In the process, many companies have adapted global sourcing and the module manufacturing system. This paper shows what impacts they have had on auto parts suppliers in the Chugoku region, based on interviews conducted at two auto makers and one auto parts supplier in 2002. There are two types of outsourced parts. One are parts designed by auto makers themselves, and the other are parts designed by part suppliers and approved by the auto makers. The former type of parts are often simple but hard to transport because of their weight or size. The latter type of parts are often high in value and easy to transport. As for global sourcing, auto makers have made more progress in sourcing the latter type. As a result, many high value parts have been manufactured outside the region. The module manufacturing system involves the assembly of a group of parts by the part supplier. These core suppliers, which assemble parts sent from other suppliers, are required to have a higher capacity of technological development than ever before. As a result of this, Tier 1 suppliers, which supply their parts to auto makers directly, are dividing into core suppliers and Tier 2 suppliers, which supply their parts to Tier 1 suppliers. Thus, the module manufacturing system has modified the vertical relation among local parts suppliers. Finally, it is often said that the intense competition in auto industry promotes mergers, but this is not the case in the Chugoku region. Many local suppliers are owned by the founding family, and they often lack the mutual trust which is crucial to mergers. |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-12-10 |
| Volume | volume37 |
| Issue | issue3 |
| Start Page | 1 |
| End Page | 11 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002576134 |
| JaLCDOI | 10.18926/AMO/40511 |
|---|---|
| FullText URL | 64_5_345.pdf |
| Author | Ishihara, Yoshihito| Kuroda, Shingo| Kawanabe, Noriaki| Takano-Yamamoto, Teruko| Yamashiro, Takashi| |
| Abstract | This article reports the successful surgical-orthodontic treatment of an elderly patient with dentofacial deformity and signs and symptoms of temporomandibular disorder (TMD). The patient was a 63-year-old woman with a concave profile due to mandibular protrusion. To correct skeletal deformities, the mandible was posteriorly repositioned by employing intraoral vertical ramus osteotomy (IVRO) following presurgical orthodontic treatment. After active treatment for 31 months, the facial profile was significantly improved and satisfactory occlusion was achieved. In addition, TMD symptoms of clicking sounds on the left side and difficulty in mouth opening were resolved. Regarding the findings of magnetic resonance imaging, anterior disc displacement in the opening phase was improved in the temporomandibular joint on the left side. Furthermore, stomatognathic functions were also improved without any aggravation of age-related problems. In conclusion, surgical repositioning of the mandible using IVRO leads to both morphological and functional improvements even in elderly patients. |
| Keywords | elderly patient orthodontics temporomandibular disorder intraoral vertical ramus osteotomy |
| Amo Type | Case Report |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 345 |
| End Page | 349 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975769 |
| Web of Science KeyUT | 000283563300011 |
| JaLCDOI | 10.18926/AMO/40510 |
|---|---|
| FullText URL | 64_5_339.pdf |
| Author | Miyatake, Nobuyuki| Shikata, Kenichi| Makino, Hirofumi| Numata, Takeyuki| |
| Abstract | The link between changes in a subject's metabolic syndrome components and her estimated glomerular filtration rate (eGFR) was evaluated in healthy Japanese women. We used data for 53 Japanese women (46.0±10.9 years) with a 1-year follow up. eGFR was defined by a new equation developed for Japan. There were no significant relationships between eGFR and clinical parameters at baseline. Subjects were given advice for dietary and lifestyle improvement. At the 1-year follow up, eGFR was significantly increased. In addition, changes in eGFR were weakly correlated with systolic blood pressure(r＝－0.306, p＝0.0260). A decrease in systolic blood pressure may be associated with improving eGFR in Japanese women. |
| Keywords | systolic blood pressure estimated glomerular filtration rate (eGFR) metabolic syndrome lifestyle modification |
| Amo Type | Short Communication |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 339 |
| End Page | 343 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975768 |
| Web of Science KeyUT | 000283563300010 |
| JaLCDOI | 10.18926/AMO/40509 |
|---|---|
| FullText URL | 64_5_331.pdf |
| Author | Park, Se-Jin| Jung, Young-Bok| Jeong, Hwa Jae| Shin, Hun-Kyu| Jung, Ho-Joong| Lim, Jong-Jun| Yoon, Ji-Woong| Kim, Eugene| |
| Abstract | Among patients that underwent total knee arthroplasty from June, 1990 to January, 1999, 61 cases (44 patients) that could be followed for more than 10 years were included in this study. The patients were divided into a patellar retention group and a patellar resurfacing group, and were compared with regard to their clinical and radiological outcomes. In patients undergoing primary TKA, a selective patellar resurfacing protocol was used. The indications for patellar retention were a small patella, nearly normal articular cartilage, minimal preoperative patellofemoral pain, poor patellar bone quality, and young patient age. When patellar retention was performed, osteophytes of the patella were removed and marginal electrocauterization was carried out. There were 25 cases (20 patients) in the patellar retention group and 36 cases (29 patients) in the patellar resurfacing group. The mean follow-up period was 140.7 months in the patellar retention group and 149.0 months in the patellar resurfacing group. The selective patellar resurfacing with total knee arthroplasty had a favorable outcome;there were a significant difference noted between the 2 groups in the functional scores, which showed better outcomes in the patellar resurfacing group than in the patellar retention group. |
| Keywords | total knee arthroplasty (TKA) selective patellar resurfacing patellar retention patellar resurfacing |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 331 |
| End Page | 338 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975767 |
| Web of Science KeyUT | 000283563300009 |
| JaLCDOI | 10.18926/AMO/40508 |
|---|---|
| FullText URL | 64_5_323.pdf |
| Author | Kanaoka, Yuji| Inagaki, Ei-ichirou| Hamanaka, Souhei| Masaki, Hisao| Tanemoto, Kazuo| |
| Abstract | The transient systemic low perfusion that occurs during cardiovascular surgery leads to oxidative stress and the production of free radicals. A systemic increase of various markers of oxidative stress has been shown to occur during cardiopulmonary bypass (CPB). However, these markers have not been adequately evaluated because they seem to be reactive and short-lived. Here, oxidative stress was measured using the free radical analytical system (FRAS 4) assessing the derivatives of reactive oxygen metabolites (d-ROMs) and biological antioxidant potential (BAP). Blood samples were taken from 21 patients undergoing elective cardiovascular surgery. CPB was used in 15 patients, and abdominal aortic aneurysm (AAA) surgery without CPB was performed in 6. Measurements of d-ROMs and BAP were taken before surgery, 1 day, 1 week, and 2 weeks after surgery, and oxidative stress was evaluated. The d-ROM level increased gradually after cardiovascular surgery up to 2 weeks. Over time, the d-ROM level after surgery involving CPB became higher than that after AAA surgery. This difference reached statistical significance at 1 week and lasted to 2 weeks. The prolongation of CPB was prone to elevate the d-ROM level whereas the duration of the aortic clamp in AAA surgery had no relation to the d-ROM level. The BAP was also elevated after surgery, and was positively correlated with the level of d-ROMs. In this study, patients who underwent cardiovascular surgery involving CPB had significant oxidative damage. The production of ROMs was shown to depend on the duration of CPB. Damage can be reduced if CPB is avoided. When CPB must be used, shortening the CPB time may be effective in reducing oxidative stress. |
| Keywords | oxidative stress reactive oxygen metabolites (ROM) extracorporeal circulation (ECC) |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 323 |
| End Page | 330 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975766 |
| Web of Science KeyUT | 000283563300008 |
| JaLCDOI | 10.18926/AMO/40507 |
|---|---|
| FullText URL | 64_5_317.pdf |
| Author | Myo-Khin| San-San-Oo| Khin, May Oo| Shimono, Kunio| Koide, Norio| Okada, Shigeru| |
| Abstract | We studied the prevalence of hepatitis C virus infection among blood donors from 3 hospitals of Central Myanmar and 7 hospitals of Lower Myanmar in the Yangon area, and analyzed the factors associated with the infection. The study period was from November, 2005 to June, 2007. A pre-tested questionnaire was used to obtain information on age, ethnic group, marital status, tattooing, body piercing, history of receiving transfusions, and liver diseases in self and in sexual partners. Data on seropositivity to hepatitis C, hepatitis B and human immunodeficiency virus infections were recorded. A total of 65,240 blood donors participated in the study. Their ages ranged from 18 years to 60 years (mean±SD＝29.5±9.3). The male-to-female ratio was 6：1. The prevalence of the antibody to hepatitis C was found to be 0.95% with varying rates (0.34 to 2.03) among hospitals. Females had a slightly higher rate (1.06%) than males (0.93%) (p＝0.237). Multivariate analyses revealed the following factors to be related to HCV infection:HIV infection, odds ratio (OR)＝3.0 (p＝0.003);history of liver disease, OR＝8.9 (p＝0.001);and age 30 years and above, OR＝2.6 (p＝0.001). We discuss the varying prevalences of HCV around the world. |
| Keywords | Myanmar hepatitis C prevalence blood donors associated factors |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 317 |
| End Page | 321 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975765 |
| Web of Science KeyUT | 000283563300007 |
| JaLCDOI | 10.18926/AMO/40506 |
|---|---|
| FullText URL | 64_5_307.pdf |
| Author | Kang, Hyun| Cha, Su-Man| Park, Sun-Gyoo| Jung, Yong-Hun| Woo, Young-Cheol| Kim, Jin-Yun| Koo, Gill-Hoi| Kim, Seong-Deok| Baek, Chong-Wha| |
| Abstract | It is not known whether changing from isoflurane to desflurane during the latter part of anesthesia shows early emergence and recovery in long surgery. We therefore evaluated the effects of changing isoflurane to desflurane on emergence and recovery. Eighty-two patients were randomly assigned to receive isoflurane (Group I) or desflurane (Group D) or to change from isoflurane to desflurane anesthesia (Group X). At the point when there was an hour until the operation would end, isoflurane was replaced with 1 MAC of desflurane in Group X, and isoflurane and desflurane were maintained at 1 MAC in Groups I and D. When the operation ended, we compared the emergence and recovery characteristics among the 3 groups. Compared with Group I, Group X showed faster emergence and recovery. Group X and Group D showed similar emergence and recovery. In conclusion, changing isoflurane to desflurane during the latter part of anesthesia improves emergence and recovery. |
| Keywords | desflurane isoflurane laparotomy recovery |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 307 |
| End Page | 316 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975764 |
| Web of Science KeyUT | 000283563300006 |
| JaLCDOI | 10.18926/AMO/40505 |
|---|---|
| FullText URL | 64_5_299.pdf |
| Author | Sanomura, Takayuki| Ikeda, Fusao| Katoh, Tsutomu| Hosokawa, Kazue| Suzuki, Seiyuu| Nishiyama, Yoshihiro| |
| Abstract | Tumor protrusion in hepatocellular carcinoma (HCC) is one of the risk signs of tumor rupture. Despite curative tumor treatments, HCC recurrences sometimes occur with rapidly growing humped or ruptured HCC in small sized tumors. The aim of this study was to clarify the characteristics of humped HCC clinically and radiologically associated with tumor progression, liver damage, and treatment. The subjects were 179 consecutive HCC patients who underwent angiographic examination. Dynamic studies, using helical computed tomography and magnetic resonance imaging were assessed, and the HCC area were measured. The tumor-node-metastasis (TNM) stage differed significantly between the humped and non-humped HCC groups. Humped HCC was more frequently observed in the right lobe (29.3% of right-lobe HCCs) than in the left (10.1%;p＝0.003). Analysis of recurrent HCC revealed that patients with multiple treatments of >4 sessions had more humped HCC (33.8%) than those with 1-3 sessions (16.7%;p＝0.042). Multivariate regression analysis revealed that tumor invasion in the portal vein, rather than large tumor size, was significantly associated with tumor protrusion. HCC recurrence with humped HCC occurs often in patients with multiple treatments. Tumor factors of the TNM classification, especially tumor invasion in the portal vein, might be associated with the mechanisms of tumor protrusion. |
| Keywords | humped HCC tumor protrusion |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 299 |
| End Page | 305 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975763 |
| Web of Science KeyUT | 000283563300005 |
| JaLCDOI | 10.18926/AMO/40504 |
|---|---|
| FullText URL | 64_5_293.pdf |
| Author | Sugimoto, Yoshihisa| Ito, Yasuo| Tomioka, Masao| Shimokawa, Tetsuya| Shiozaki, Yasuyuki| Mazaki, Tetsuro| Tanaka, Masato| |
| Abstract | We used a navigation system to insert 128 pedicle screws into 69 vertebrae (L1 to L3) of 49 consecutive patients. We assessed the pedicle isthmic width and the permission angle for pedicle screw insertion. The permission angle is the angle defined by the greatest medial and lateral trajectories allowable when placing the screw through the center of the pedicle. The rate of narrow-width pedicles (isthmic width less than 5mm) was 5 of 60 pedicles (8%) at L1, 4 of 60 pedicles (7%) at L2, and none (0%) at L3, L4 and L5. The rate of narrow-angle pedicles (a permission angle less than 15 degrees) was 21 of 60 pedicles (35%) at L1, 7 of 60 (12%) at L2, 3 of 60 (5%) at L3, and none (0%) at L4 and L5. Of 128 pedicle screws inserted into 69 vertebrae from L1 to L3, 125 (97.7%) were classified as Grade 1 (no pedicle perforation). In general, the upper lumbar vertebrae have more narrow-width and -angle pedicles. However, we could reduce the rate of pedicle screw misplacement in upper lumbar vertebra using a three-dimensional fluoroscopy and navigation system. |
| Keywords | upper lumbar navigation pedicle screw anatomy misplacement |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 293 |
| End Page | 297 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975762 |
| Web of Science KeyUT | 000283563300004 |
| JaLCDOI | 10.18926/AMO/40503 |
|---|---|
| FullText URL | 64_5_285.pdf |
| Author | Nishimori, Hisakazu| Takahashi, Shunji| Kiura, Katsuyuki| Ennishi, Daisuke| Kobayashi, Takayuki| Sano, Koji| Shinozaki, Eiji| Yokoyama, Masahiro| Mishima, Yuko| Terui, Yasuhito| Chin, Keisho| Mizunuma, Nobuyuki| Ito, Yoshinori| Nishimura, Seiichiro| Takeuchi, Kengo| Ishikawa, Yuichi| Oguchi, Masahiko| Tanimoto, Mitsune| Hatake, Kiyohiko| |
| Abstract | We evaluated the efficacy and toxicity of cisplatin/docetaxel (CDDP/TXT) chemotherapy and identified prognostic factors in Japanese patients with cancer of unknown primary site (CUP). Twenty-eight consecutive patients seen at a single institute were reviewed retrospectively. Sixteen patients were treated with TXT 80mg/m2, followed by CDDP 75mg/m2. The overall response rate to CDDP/TXT treatment was 62.5%, with a median survival time (MST) of 22.7 months. Common adverse reactions were myelosuppression and hyponatremia. The MST of all 28 patients with CUP was 8.3 months, and the 1-year overall survival rate was 45.6%. Univariate analysis identified 5 prognostic factors:performance status, liver involvement, bone involvement, pleural involvement, and lymph node involvement. In conclusion, CDDP/TXT chemotherapy is effective with tolerable toxicity in patients with CUP. Japanese patients with CUP might be chemosensitive and may survive longer. |
| Keywords | cancer of unknown primary site (CUP) cisplatin docetaxel prognosis |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 285 |
| End Page | 291 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975761 |
| Web of Science KeyUT | 000283563300003 |
| JaLCDOI | 10.18926/AMO/40502 |
|---|---|
| FullText URL | 64_5_277.pdf |
| Author | Kumase, Fumiaki| Morizane, Yuki| Mohri, Satoshi| Takasu, Ippei| Ohtsuka, Aiji| Ohtsuki, Hiroshi| |
| Abstract | Endothelial glycocalyx (GCX) has been reported as a protective factor for vascular endothelial cells (VEC) in diabetes and hypertension. However, the involvement of GCX impairment in ocular vasculopathy remains unclear. We evaluated the changes in the GCX thicknesses of the retinal and choroidal capillaries in rats with diabetes and hypertension by cationic colloidal iron staining using a transmission electron microscope. In the control group, the mean (standard error of the mean) thicknesses of retinal and choroidal GCX were 60.2 (1.5) nm and 84.3 (3.1) nm, respectively. The diabetic rats showed a significant decrease of GCX thickness in the retina, but not in the choroid, compared to controls (28.3 (0.3) nm, p＜0.01 and 77.8 (1.4) nm, respectively). In the hypertensive rats, both retinal and choroidal GCX were significantly decreased compared to the control values (10.9 (0.4) nm and 13.2 (1.0) nm, respectively, both p＜0.01). Moreover, we could visualize the adhesion of leukocytes and platelets on the luminal surface of VEC, at the site where the GCX was markedly degraded. These findings suggest that the GCX prevents adhesion of leukocytes and platelets to the VEC surface, and this impairment may lead to ocular vasculopathy in diabetes and hypertension. |
| Keywords | glycocalyx retina choroid diabetes hypertension |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 277 |
| End Page | 283 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975760 |
| Web of Science KeyUT | 000283563300002 |
| JaLCDOI | 10.18926/AMO/40501 |
|---|---|
| FullText URL | 64_5_267.pdf |
| Author | Sagara, Hidenori| Sendo, Toshiaki| Gomita, Yutaka| |
| Abstract | In the runway model of intracranial self-stimulation (ICSS) experimentation, the experimental animal is timed in running a fixed distance to depress a lever that releases electrical stimulation to an electrode implanted along its medial forebrain bundle. This ICSS has both a reward and a motivational component. Using the runway method and priming stimulation, we designed an experimental method for directly measuring motivation. An assessment of pharmacological agents that are known to influence motivational states was also undertaken. Using the experimental methods that we created, we observed prominent changes in running speed when animals were exposed to methamphetamine and nicotine. According to these data, the runway method employing intracranial self-stimulation behavior may be useful for the evaluation of substances that act on motivation. We review the underlying neuropharmacological and anatomical functions associated with our experimental methods. We hope that this technique will be used to scientifically evaluate the impact of drugs and/or therapeutic interventions on human motivation. |
| Keywords | intracranial self-stimulation behavior motivational effect methamphetamine nicotine |
| Amo Type | Review |
| Publication Title | Acta Medica Okayama |
| Published Date | 2010-10 |
| Volume | volume64 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 267 |
| End Page | 275 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2010 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 20975759 |
| Web of Science KeyUT | 000283563300001 |
| JaLCDOI | 10.18926/OER/40500 |
|---|---|
| FullText URL | oer_037_2_057_063.pdf |
| Author | Yokoo, Masanori| |
| Abstract | In many standard undergraduate textbooks of macroeconomics, open economies are discussed by means of the Mundell−Fleming model, an open macroeconomic version of the IS−LM model. This short paper develops a simple differential−equation version of the dynamic Mundell−Fleming model, taking account of two key assumptions : (i) the Marshall−Lerner condition is globally violated and (ii) the investment function depends nonlinearly on the current output level. Under our settings, we demonstrate that the exchange rate and the other relevant variables can display persistent fluctuations due to the occurrence of a stable limit cycle. We also discuss a paradox that the resulting dynamics may well be consistent with the J−curve effect. |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-09-10 |
| Volume | volume37 |
| Issue | issue2 |
| Start Page | 57 |
| End Page | 63 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | English |
| File Version | publisher |
| NAID | 120002514605 |
| JaLCDOI | 10.18926/OER/40499 |
|---|---|
| Title Alternative | A Study on the Executive’s Business Values Tradition : The Case Study of Shonosuke Hayashi at YOSHIMOTO KOGYO Applied the Metaphor for Gene Tradition |
| FullText URL | oer_037_2_037_056.pdf |
| Author | Matsuda, Yoichi| |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-09-10 |
| Volume | volume37 |
| Issue | issue2 |
| Start Page | 37 |
| End Page | 56 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002514606 |
| JaLCDOI | 10.18926/OER/40498 |
|---|---|
| Title Alternative | Evaluation of Overseas Investment Projects |
| FullText URL | oer_037_2_019_036.pdf |
| Author | Koyama, Yasuhiro| |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-09-10 |
| Volume | volume37 |
| Issue | issue2 |
| Start Page | 19 |
| End Page | 36 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002514604 |
| JaLCDOI | 10.18926/OER/40490 |
|---|---|
| Title Alternative | CH Associates, A History of the Bureau of the Public Debt, 1940−1990 : with historical highlights from 1789−1939 |
| FullText URL | oer_037_1_131_148.pdf |
| Author | Ichinose, Atsushi| |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-06-10 |
| Volume | volume37 |
| Issue | issue1 |
| Start Page | 131 |
| End Page | 148 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002514602 |
| JaLCDOI | 10.18926/OER/40489 |
|---|---|
| Title Alternative | Wirtschaftshistoriker Iosif Mikhailovich Kulisher -SeineWerke, sein Leben, seine Familie- |
| FullText URL | oer_037_1_103_130.pdf |
| Author | Matsuo, Nobushige| |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-06-10 |
| Volume | volume37 |
| Issue | issue1 |
| Start Page | 103 |
| End Page | 130 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002514601 |
| JaLCDOI | 10.18926/OER/40488 |
|---|---|
| FullText URL | oer_037_1_063_088.pdf |
| Author | Fujii, Daiji| |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-06-10 |
| Volume | volume37 |
| Issue | issue1 |
| Start Page | 63 |
| End Page | 88 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | English |
| File Version | publisher |
| NAID | 120002514600 |
| JaLCDOI | 10.18926/OER/40487 |
|---|---|
| FullText URL | oer_037_1_053_061.pdf |
| Author | Yokoo, Masanori| |
| Abstract | This paper considers a dynamic commons game in relation with mitigation of invasive alien species such as nutria in Okayama. In our commons game, players (trappers) non−cooperatively seek to maximize their own payoff by extracting the renewable resource stock (nutria). One key assumption is that the cost of extraction of the resource is negatively related to the current stock level. For a low level of resource stock, the extraction cost is high, which makes the extraction less lucrative for the players and which in turn stimulates the renewable resource stock to regenerate more rapidly. As the resource stock reaches a high level, the reverse process will start, and this can cause oscillating behaviors. Our simple model proposed here exemplifies that an increase in the number of players can drastically change the qualitative as well as quantitative features of the dynamics for the renewable resource stock. |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-06-10 |
| Volume | volume37 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 61 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | English |
| File Version | publisher |
| NAID | 120002514603 |
| JaLCDOI | 10.18926/OER/40447 |
|---|---|
| Title Alternative | Market Risk and Private Risk −Financial Appraisal of Investment Projects− |
| FullText URL | oer_037_1_035_051.pdf |
| Author | Koyama, Yasuhiro| |
| Abstract | The purpose of this paper is to examine one of the functions which entrepreneurs may play in the course of industrial development through a case study of Japan’s RPG development race. As Japan’s toy manufacturers often said, their market was characteristic of its small size and considerable demand volatility in comparison to other consumer products. Entrepreneurs must have seen any commitment to a cutting edge product, video games, as only a gamble and therefore behaved in a trial−and−error way. Furthermore, judging from the fact that no one could imagine the video game would come to turn over ¥1500 billion in 20 years, the firm level trial−and−errors and their subsequent variety of strategies on the industry level must have been the key to understand the unexpected market growth and technical evolution. However, recent management thoughts told us that the strategic variety in an industry could be possibly indulged by various pressures towards homogeneity. Such counter powers are referred to as organizational isomorphism, strategic bandwagon effects and so on. To examine those pressures which drive entrepreneurs back and forth towards strategic variety, this paper looks at the structural characteristics which underlie the way entrepreneurs see things in an uncertain environment. The case analysis takes the view that the video game industry was so uncertain that nothing could affect so deterministically entrepreneurs’ behaviours other than their perceptions. As a conclusion here, this paper points out some tradeoffs underlying the two different strategies which the twin peaks of Japanese RPG producers, Square and Enix, employed to meet with the uncertainty of the infant RPG market. It also argues that these tradeoffs based on two different perceptions might have kept their startups from the isomorphic indulgence. As a more prospective argument, questioned is the quality of strategic variety which is often deemed as an unquestionable remedy to industrial stagnation. |
| Publication Title | 岡山大学経済学会雑誌 |
| Published Date | 2005-06-10 |
| Volume | volume37 |
| Issue | issue1 |
| Start Page | 35 |
| End Page | 51 |
| ISSN | 0386-3069 |
| Related Url | http://www.e.okayama-u.ac.jp/gakkai/ |
| language | Japanese |
| File Version | publisher |
| NAID | 120002509311 |
