실물 옵션(real option)을 활용한 R&D 투자 결정 : 옵션 실행에 영향을 주는 요인 및 효과를 중심으로

박오원 가톨릭대학교 산업경영연구소 2010 産業經營硏究 Vol.- No.18

抗內作業夫의 作業環境과 能率에 關한 考察

權五泉 全北大學校 1967 論文集 Vol.9 No.-

Performance of Three Warm Season Turfgrasses under Linear Gradient Irrigation

Ow, Lai Fern,Subhadip Ghosh 한국잔디학회 2017 Weed & Turfgrass Science Vol.6 No.1

The appropriate level of irrigation for turfgrasses is vital to the performance of the turfgrass as well as conservation of water. Linear gradient irrigation system (LGIS) facilitates long-term study of turf performance under continuous irrigation gradients at extreme ends of the irrigation scale. The objectives of this study were to: a) determine the minimum irrigation requirements and relative drought resistance in three warm season turfgrasses; and b) evaluate the medium to long-term effects of irrigation levels on turf persistence, weed invasion, and susceptibility to diseases. Results suggest that grasses differed in drought resistance and persistence under variable irrigation regimes. Irrigation (Ep) required for consistent acceptable turf quality for respective grasses was Cynodon dactylon x C. transvaalensis (61%), Zoysia matrella L. Merr (73%), and Stenotaphrum secundatum ‘Palmetto’ (86%). Brown patch infection was most prevalent in Stenotaphrum secundatum ‘Palmetto’ at 12 and 125% Ep irrigation. Cynodon dactylon x C. transvaalensis and Zoysia matrella L. Merr were better able to adapt to the various irrigation regimes, and this ability allowed these species to resist drought, and maintain turf coverage which in turn, kept weeds and the occurrence of diseases at bay. Ranking these grasses for their drought tolerance abilities showed that Cynodon dactylon x C. transvaalensis had the most outstanding resistance against drought, followed by Zoysia matrella L. Merr, and lastly, Stenotaphrum secundatum ‘Palmetto’. Despite having the highest irrigation requirement, Stenotaphrum secundatum ‘Palmetto’ was still not able to maintain persistence at high irrigation regimes. Likewise, this grass also lost turf coverage at low irrigation levels.

Performance Assessment of Three Turfgrass Species, in Three Different Soil Types, and their Responses to Water Deficit in Reinforced Cells, Growing in the Urban Environment

Ow, L. F.,Ghosh, S.,Chin, S. W. 한국잔디학회 2015 Weed & Turfgrass Science Vol.4 No.4

Reinforcement cells are used to aid grass growth and taken together, this serves to extend greenery beyond the conventional spaces of lawns, tree pits, gardens, and parks, and is advantageous to urban cities since space for greening is often limited. Drought has variable effects on plant life and the resilience of turf to drought resistance also varies with species. Changes in photosynthetic ability were more pronounced for media rather than grass species. The media of sand without organic matter was found to be least suited for drought resistance. Normalized difference vegetation index (NDVI) and digital image analysis (DIA) data were generally in favour of Zoysia species as oppose to A. compressus. In A. compressus, selective traits such as, a more extensive root system and lower specific leaf area (SLA) were not an underlying factor that assisted this grass with enhanced drought resistance. Generally, WUE was found to be strongly related to plant characterises such as overall biomass, photosynthetic features as well as the lushness indexes, and specific leaf area. This study found a strong relationship between WUE and a suite of plant characteristics. These traits should serve as useful selection criteria for species with the ability to resist water stress.

Effects of localised liquid fertilization of N, P, K and Ca on root development in Zoysia matrella, Cynodon dactylon and Stenotaphrum secundatum

Ow, Lai Fern,Yusof, Mohamed Lokman Mohd The Korean Society of Weed ScienceThe Turfgrass So 2018 Weed & Turfgrass Science Vol.7 No.1

Turfgrass species were evaluated for their rooting and foliar characteristics, and their interaction with the soil. The rooting system was divided into three compartments, one above another, such that the top and bottom compartments of the root system could be supplied with a nutrient deprived solution. Exposure of parts of the roots to nitrate deprivation caused a localised retardation of root initiation and extension, compared with zones receiving the full supply of nutrients. This resulted in considerable modification to root form, coupled with a significant depression in foliar growth. The extension of roots was the least affected by the deprivation of potassium. Phosphate and calcium deprivations gave rise to similar responses in root and foliar formation. Results from this study showed that external concentrations of nitrogen, phosphorus, potassium and calcium are required by the root system in varying amounts for optimal growth of roots. Turfgrass coverage and turf quality ratings further reinforced these findings. No significant difference was observed between the different grasses examined here. All three species responded similarly to the deprivation of the various nutrients. Results from this study confirmed that targeted fertilization programs are beneficial and can help reduce cost, chemical usage and prevent leachate and contamination.

인적자원관리 시스템과 기술혁신간의 관계

박오원(Ow-Won Park) 한국산업경영학회 2009 경영연구 Vol.24 No.4

헌신형 인적자원관리 시스템이 조직성과에 긍정적인 영향을 준다는 사실이 많은 실증연구를 통해 밝혀지면서 헌신형 인적자원관리 시스템의 특성에 대한 관심이 증가되고 있다. 기존 연구에서는 헌신형 인적자원관리 시스템의 특성 중에서도 관계적 관점에 초점을 두고 헌신형 인적자원관리 시스템이 종업원들간의 긴밀한 관계와 협력을 촉진시키는 특성을 가지고 있음을 실증분석 하였다. 본 연구에서는 헌신형 인적자원관리 시스템이 이러한 관계와 협력을 강조하는 특성 이외에 유연성을 강조함으로써 기업가 지향성을 높이는 특성도 가지고 있음을 실증분석을 통해 파악하고자 하였다. 즉, 헌신형 인적자원관리 시스템은 조직 전반적으로 기업가 지향성 조직분위기를 높임으로써 궁극적으로 기술혁신에 긍정적인 영향을 미칠 수 있다는 것이다. 이러한 연구목적을 위하여 국내 기업 R&D 연구소 111개를 대상으로 실증분석한 결과 헌신형 인적자원관리 시스템은 기업가 지향성 조직분위기와 정의 관계를 보였다. 또한 기업가 지향성 조직분위기는 헌신형 인적자원관리 시스템과 탐색적 기술혁신성과간의 관계를 부분매개하였으며, 헌신형 인적자원관리 시스템과 활용적 기술혁신성과간의 관계는 완전매개하였다. 마지막으로 연구의 시사점과 향후 연구방향에 대해 논의하였다. As many previous studies have shown that high commitment HRM system have a positive effect on organizational performance, the features of high commitment HRM system have been the focus of recent research in strategic human resource management areas. In previous studies, researchers have focused on relational perspective and analyzed high commitment HRM system can enhance close relationships and cooperation among employees. In this paper, I proposed high commitment HRM system can also enhance entrepreneurial orientation through organizational flexibility. Then, I empirically tested the relationship among high commitment HRM system, organizational climate for entrepreneurial orientation and technological innovation. The empirical results using 111 R&D laboratory in Korean firms showed that high commitment HRM systems was positively related to organizational climate for entrepreneurial orientation. I also found organizational climate for entrepreneurial orientation have partially mediated the relationship between high commitment HRM system and exploratory technological innovation and have fully mediated the relationship between high commitment HRM system and exploitative technological innovation. Finally, I discussed some theoretical and practical implications and future researches.

기업성과가 인적자원 투자에 미치는 효과

박오원(Ow-Won Park) 대한경영학회 2014 大韓經營學會誌 Vol.27 No.4

조직여유와 기술혁신간의 관계: 인적자원관리 시스템의 조절효과

박오원 ( Ow Won Park ) 한국중소기업학회 2010 기업가정신과 벤처연구 Vol.13 No.1

핵심인재관리와 조직성과

박오원(Park, Ow Won) 대한경영학회 2013 大韓經營學會誌 Vol.26 No.2

[Oral Session 4] A Novel Method for Calcjum Hardness Control of Closed OCC Recycling System

Say-Kyoun Ow,Jong-Ho Shin,Bong-Keun Song,Jeong-Yong Ryu 한국펄프·종이공학회 1999 한국펄프종이학회 기타 간행물 Vol.- No.-

A new technique for recycling process water was developed in order to reduce the calcium hardness of the closed OCC recycling system. Calcium ions present in the white water were precipitated as calcium carbonate by a reaction with sodium carbonate, and the CaCO₃precipitates were easily removed from the system by a dissolved air flotation(DAF) method. After the OAF stage, CO₂-gas was purged into the water because the pH of Na₂CO₃-treated white water was reduced to neutral by CO₂ gas.<br/> Since CaCO₃ precipitate tends to stick onto the fine fiber surface and then is selectively removed from the water, a proper amount of suspended solid in the process water acts as an important factor in deciding the removal efficiency. By the application of Na₂CO₃ addition - DAF - CO₂ purging to the short circulated white water. the calcium hardness was significantly reduced by 92% and more. The removal of calcium ions with tine fibers led to drainage improvement, reduction of fresh water consumption, and enhanced efficiency of wet-end chemicals.