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박우용,강진규,김광섭 대한설비관리학회 1998 대한설비관리학회지 Vol.3 No.1
In general, Automated Storage/Retrieval Systems(AS/RS) have racks of equal size. But higher utilization of warehouse storage can be achieved by using AS/RS with racks of different size. Thus those AS/RS are more adequate and efficient in current production environment. This thesis presents an analytical model of AS/RS for design process which minimizes the installation and operating costs over a time period. In this model, we assume that the AS/RS is operating under the random storage assignment policy and single command mode of stacker crane. And the AS/RS dimensional constraints(height, length and width), average travel cycle time of stacker crane in each zone and several appropriate cost elements are considered. The model is formulated as an integer nonlinear program and an enumeration based algorithm is proposed to find an optimum solution. Finally, tile computer program using Visual Basic is presented and the solution algorithm is validated through an numerical example.
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박우용,윤상열,엄진화,강창구,김동희,김대조 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.5
Despite of their frequent occurrence among the brain tumor, meningiomas are rarely seen as a multiple growth. Most authors report an incidence ranging from 1 to 3% of all meningioma prior to the introduction of computed tomography. After the CT has introduced, diagnostic problems invloved with multiple meningiomas were resolved, and its reported incidence was arisen to 8~8.9% of all meningiomas. It may be difficult to differenciate multiple meningioma from the special varient(forme fruste) of von Recklinghausen's disease. Although the pathogenetic factors related to the multiple meningiomas are unknown, various theories of the etilogy have been studied and reported. We report a patient with mulitple meningioma without evidence of von Recklinghausen's diseases.
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Load cell에 의한 耕耘作業時 耕耘特性에 關한 硏究
朴又龍 順天大學校 1985 論文集 Vol.4 No.1
動力耕耘機用 쟁기의 牽引抵抗을 究明하고 作業能力을 提高하기 위해 圃場에서 使用하는 Mold board를 選擇 각방향의 힘을 여러 條件에서 測定한 結果를 다음과 같이 要約할 수 있다. 1) 圃場에서 牽引抵抗中 垂直力은 水平力보다 耕深의 增加에 따라 그 增加率이 높게 나타나며, 밭에서 그 現象은 심하다. 2) 土壤條件에 따른 主應力의 크기는 土壤硬度와 粘土成分이 增加할수록 커진다. 3) 畓作圃 및 田作圃의 硬度와 比抵抗을 考慮 할 때 效率的인 깊이를 畓出해 낼 수 있다. 4) Slip率 및 볏의 角度와 牽引馬力으로 볼 때 포장에 맞는 바퀴의 開發로 機關出力을 줄일 수 있다. 5) 耕心 12㎝일 때 水平力의 抵抗값이 畓과 田에서 反對現象을 나타내는 것은 特記할 課題로 提示 硏究의 問題라 본다. This study is to investigate to find out the draw resistance of the plow for the power-tiller, and the force of the each direction of the mold board used in the field in order to raise the work efficiency was measured according to the different conditions. The experimental results obtained were summarized as follows; 1. The vertical force out of the draw resistance in the field was higher than the horizontal force out of that according to the increase of the depth of tillage, and this result was remarkable in the dry field. 2. The size of the main stress in the soil hardness increased according to the increased soil hardness and the elay component. 3. When the hardness and the specific resistance of the paddy field and the dry field were considered, the efficient depth of tillage could be calculated. 4. The ratio of slip, the draw horsepower and the angle of the mold board could reduce the engine horsepower when the wheel corresponded with the field developed. 5. When the depth of tillage was 12centimenters, the resistance of horizontal force showed an opposite phenomenon between the paddy feild and the dry field and a special problem and a subject of investigation is suggested.
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박우용 한국인사ㆍ조직학회 2013 한국인사ㆍ조직학회 발표논문집 Vol.2013 No.1
Given the contradictory arguments and findings within the extant literature regarding the impact of a buy or make sourcing decision on performance in the face of architectural shifts by architectural innovations, this study attempts to provide hints as to under what conditions one particular sourcing strategy would be preferred over another by considering the in-house retention of knowledge regarding outsourced components and exploratory learning opportunities. Through an investigation of the U.S. bicycle derailleur and freewheel market, this study finds that firms pursuing a market mode while retaining knowledge regarding outsourced components in-house were likely to improve technological performances to the extent that they outperformed firms pursuing a hierarchy mode. In particular, regarding component knowledge, this study finds that design knowledge regarding outsourced components more significantly improved technological performance than patent-associated knowledge. Moreover, the more exploratory learning opportunities firms possessed when pursuing a make strategy, the more likely they were to improve technological performance to the extent that they outperformed firms pursuing a buy strategy. These findings are believed to contribute to a clearer understanding of the inconclusive and conflicting empirical results of the extant literature regarding the buy or make sourcing decision in the face of architectural shifts by architectural innovations.
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朴佑龍 계명대학교 산업기술연구소 1995 韓 · 日의 사회 · 문화 비교 Vol.- No.12
80年代에 들어와서 부터 日本의 경우,有名商品이라고는 하지만 基本的 重要部分에 있어서는 西歐에서 開發된 新製品을 약간 硏究改良한 商品이 大部分이었다고 한다. 이러한 與件下에서, 日本企業의 大量 生産, 低價格 販賣의 海外市場 早期浸透 戰略의 常套手段으로 말미암아, 結局에는 日本輸出商品에 對한 販賣의 自主規制 또는 여러나라의 日本製品 輸入制限 惜置에 直面하게 된 것으로 알고 있다. 이것은 結局,韓國商品이 日本市楊內로 進出하는 것을 더욱 어렵게 만들었고,또한 이러한 日本製品의 海外現地市場內早期出現先制低價股賣鏡爭優位로 인해 韓國商品의 이러한 第3國市場內에서의 販賣競爭 弱化는 물론 韓國市場內에서 까지도 韓國側의 -方的 不利益이 發生하게 되었다. 따라서, 日本企業의 이같은 改良된 所爲 新製品의 差別化 比較優位의 相當한 競爭力이 豫想될 경우, 여기에 對한 對應策으로서, 첫째, 韓國의 强力한 競爭商品올 開發하여 低價格으로 短期間에 그것도 大量으로 日本市場에 早期浸透시켜 後發鏡爭企業의 同類商品에 對한 市場介人에 對應、하는 直接 또는 間接的 販賣輸出 戰略이 要望되는 것이다. 즉, 이같은 戰略은 日本企業이 西歐에서 開發된 新製品올 약간 硏究改良한 것처럼 韓國企業도 日本에서 開發된 新製品올 技術的으로 修正또는 改良한 新類似 商品 또는 新市場 商品의 品質과 低價格 戰略으로서 日本商品에 對應해 나가는 戰略을 말한다. 둘째, 現在 日本이 韓國의 輪出販賣製品에 適應하고 있는 各種 差別規制 政策을, 韓國도 日本이 취하고 있는 類似한 惜置를 採擇하여 日本商品의 韓國 輸入에 대하여 對應하고 適用할 수 있어야 한다. 따라서, 이러한 日本의 差別規制政策으로因해,韓國의 對日寶易不험衛이 發生하게 된다면,韓國도이에 相應한 報復手段올 騙使하는 行爲는 世界質易 自由化의 合理的 原則에 결코 逆行하는 것은 아니다. 한편, 아무리 韓國企業의 技術水準의 鏡爭力이 日本에 비해 脫弱하다고 하더라도 60億弗의 繼續的 賢易赤字는 國家的 體面問題라 아니할 수 없는 것이다. 또한, 韓國企業이 아무리 獨創性이 豊富하고, 우수한 技術을 集結하여 高度의 輸出販賣 商品을 發明, 開發하였다 해도, 日本의 이같은 模倣된 新商品의 先制 早期 低價格 大量生塵 輸出販賣의 國際的 鏡爭優位에 對應할 수 있는 나라는 韓國뿐 아니라, 다른 어떤 나라도 없을 것이다.
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朴又龍 順天大學校 農業科學硏究所 1995 農業科學硏究 Vol.9 No.-
To study the filed condition for optimum transplanting operation and to get basic data for higher transplanting efficiency artificial soil of sandy loam, loam and clay loam with planting depth of 2 ㎝, 3 ㎝ and 4 ㎝ were analyzed. The results are as follows: 1) In case of harrowing operation after hardening the soil with 0.5 ton of roller, clay loam was most suitable for transplanting operation. 2) Cone penetration depth after 3 days of puddling was 3.76 ㎝ for sandy loam, 9.56 ㎝ for loam and 10.04 for clay loam. Torque and required power were lowest for sandy loam, and showed highest value of 1.3 PS and 76 ㎏ m for clay loam. 3) Traveling velocity was 0.34 ㎧ for sandy loam, 0.24 ㎧ for loam and 0.235 ㎧ for clay loam. Low velocity in case of loam and clay loam was due to sattlement of soil and slip. 4) Whell slip was 6.6 - 12.4% for sandy loam, 35% for loam and 37% for clay loam. 5) Distance between stubbles with setting value of 15 ㎝ was 17 ㎝ for sandy loam, 14.2 ㎝ for loam and 13.7 ㎝ for clay loam. 6) Planting depth with setting value of 2 ㎝, 3 ㎝, and 4 ㎝ was 0.51 - 1.37 ㎝ for sandy loam, 0.81 - 0.9 ㎝ for loam and 0.68 - 0.76 ㎝ for clay loam. 7) It was concluded that optimum soil condition for transplanting operation was acquired just after pudding for sandy loam, 4-5 days after pudding for loam and 5-6 days after pudding for clay loam
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