공작기계 주축용 베어링 결함검출

오석영,정의식,임영호 한국정밀공학회 1994 한국정밀공학회 학술발표대회 논문집 Vol.1994 No.11월

Degradation of 2,4-Dinitrotoluene by Persulfate and Steel Waste Powder

오석영,강승구 한국자원공학회 2010 Geosystem engineering Vol.13 No.3

We investigated the oxidation of 2,4-dinitrotoluene (DNT) by persulfate (S2O82-) activated with steel waste powder via a series of batch experiments. We hypothesized that the addition of steel waste powder into a persulfate-water system would enhance the oxidation of DNT with activated persulfate. Compared to reductive transformations of DNT by steel waste powder, DNT was rapidly removed via oxidation by steel waste powder-activated persulfate and through reduction by steel waste powder in a steel waste powder-persulfate system. As the amount of steel waste powder increased, removal of DNT increased until there was complete removal in the presence of 10 g of steel waste powder and 250 mg/L of persulfate under the given conditions. In contrast, additions of Fe2+ resulted in only 20% removal by Fe2+-activated persulfate under identical conditions. Oxidation of reductive products of DNT (2-amino-4-nitrotoluene, 2-nitro-4-aminotoluene, and 2,4-aminotoluene)by steel waste powder-activated persulfate was significantly enhanced as reduction proceeded. Our results suggest that DNT may be effectively removed by steel waste powder and/or steel waste powder-activated persulfate in soils and aquifers.

학력 간 학습 형태가 숙련향상 및 조직성과에 미치는 영향 분석 : 제조업 생산직 중심으로

오석영 한국직업능력개발원 2011 직업능력개발연구 Vol.14 No.3

This study investigates the difference of learning opportunity(formal learning and informal learning) according to education levels as well as the deference of the effect of the learning activities on skill improvement and organizational performance(job satisfaction and organizational commitment) in manufacturing sets. Education levels were grouped into secondary school graduates and post-secondary graduates. To examine two research questions, HCCP data provided by KRIVET was used, t-test and chi-square test were conducted for the first research questions, and structural equation modeling was conducted for the second research question. Through the statistical analyses, this research found that post-secondary graduates have more learning opportunities quantitatively than secondary graduates. However, secondary graduates have more learning performance in the effect of learning activities on skill improvement and organizational performance than post-secondary graduates. 본 연구는 기업 내 학력별 형식학습 및 무형식학습 참여 현황을 분석함으로써 학습기회의 균등이 실현되는지 알아보며, 기업 내 형식학습 및 무형식학습 참여가 숙련향상 및 조직성과(직무만족도 및 조직몰입도)에 미치는 영향에 있어 학력별(고졸 이하 집단, 초대졸 이상 집단) 차이가 있는지 알아보는 것을 목적으로 한다. 한국직업능력개발원에서 실시한 ?인적자본기업패널?의 자료를 바탕으로 연구목적과 관련된 2개의 가설을 검증하였는데 그 결과는 다음과 같다. 첫째, 학력 간 형식 및 무형식학습 참여에 있어 양적인 차이가 존재하였으나, 두 학습활동에 대한 인지적(만족도) 차이에 있어서는 거의 차이가 없는 것으로 나타났다. 둘째, 형식학습의 숙련향상 및 조직성과에 대한 효과가 학력 간 발생하였으며, 무형식학습의 숙련향상 및 조직성과에 대한 효과도 학력 간 발생하는 것으로 나타났다. 하지만 숙련향상의 조직성과에 대한 영향은 두 집단 간 차이가 없는 것으로 나타났다. 이 연구결과는 향후 제조업 생산직 근로자들 중 중등직업교육 졸업자들의 기업 내 학습활동계획 수립에 기여할 것을 기대한다.

The effects of workplace learning on organizational socialization in the youth workforce

오석영 서울대학교 교육연구소 2016 Asia Pacific Education Review Vol.17 No.4

The purpose of this study was to identify how high school graduate newcomers adjust to working in organizations. This study examines how their formal learning, intended informal learning, and unintended informal learning experiences jointly influence their adjustment processes [e.g., role clarity and personal–organizational (P-O) fit]. It also explores the extent to which the newcomers’ adjustment processes relate to socialization outcomes (e.g., job satisfaction, organizational commitment, and intention to quit) and their mediating effects on the relationship between the types of learning and socialization outcomes. Results show that formal learning and intended informal learning have a strong positive relationship with P-O fit, while unintended informal learning is positively associated only with role clarity. In addition, role clarity indirectly and P-O fit directly affect job satisfaction, organizational commitment, and intention to quit. The implication for management practices and future research is discussed.

미국 일터경험학습 평가제도 사례를 통한 선취업 후진학 평생학습지원 방안 탐색

오석영 한국성인교육학회 2014 Andragogy Today : International Journal of Adult & Vol.17 No.1

This study is to identify how to establish lifelong learning education systems for those who get a job after secondary education. through reviewing several cases of Prior Learning Assessment(PLA) in the U.S. This research analyze 1) Walmart’s lifelong learning program which give an opportunity to take college-level credits through their specific job experience, 2) Starbucks case which implement a transfer system from non-formal learning experience (participating in corporate education) to college-level credits, and 3) the Washington State’ Crosswalk program which operate knowledge transfer system from a informal learning experience such as on the job training and apprenticeship to college credits. To apply PLA in Korea, the notion on the corporate education should be changed from a chance to deliver a simple skill for employees to improve their performance at workplace, to a lifelong career development opportunity which employees can develop their knowledge and skills as their life competencies. Moreover the cases also give us a thought that universities, government and companies should cooperate with one another in order for employees to easily and fairly transfer their work experience to university credits with development of their potentials. 본 연구는 고졸 취업자를 위한 후진학을 독려할 수 있는 다양한 평생학습 체제 구축을 위해 미국 선행경험학습평가체제(PLA) 사례연구를 실시하였다. 본 연구의 목적은 미국의 경우 일터 내 무형식학습의 학점화의 과정 및 사례는 어떤 것이 있지 알아보고, 비형식학습의 학점화 과정 및 사례는 어떤 것이 있는지 알아봄에 있으며, 이를 위해 미국 월마트, 스타벅스, 워싱턴 주정부의 사례를 알아보았다. 미국 월마트의 경우 기업 내 특정 직종 및 직무를 역량화하였고, 스타벅스의 경우 ACE의 인증을 받은 사내 교육과정을 대학이 받아들여 학점으로 전환하는 비형식학습의 학점화의 전형적인 예를 보여주었다. 또한 워싱턴주의 ‘교차로 프로그램’은 도제학습이나 OJT를 자격시험이나 대학 수준의 학점으로 전환시키기 위한 주정부, 각종협회, 학교, 기업의 공동노력의 사례를 보여 주었다. 이상의 사례는 우리 기업의 평생교육체제로의 적극적 참여가 필요하며, 이를 위한 정부의 제도적 마련과 학교의 적극적 협력이 필요할 것이라는 시사점을 주었다.

조직 내 권력 형태와 조직학습활동간의 관계 탐색

오석영 한국경영교육학회 2014 경영교육연구 Vol.29 No.2

The purposes of this study is to identify the relationship between power and organizational learning activities in Korean companies. The forms of power this study uses are episodic and system power, that is proposed by Lawrence et al.(2005). The episodic power consist of ‘influence’ and ‘force’, while the systemic power is constituted of ‘domination’ and ‘discipline.’ Moreover, this study regards organizational learning activities as interactive learning and knowledge transfer activities. Based on literature, this study theoretically develop a conceptual model with 7 hypotheses regarding how four different forms of power impact on interactive learning and knowledge transfer activities. To examine the hypotheses, HCCP data provided by KRIVET was used, structural equation model analysis was conducted. This research found that the domination of power has strong relationship to both interactive learning and knowledge transfer activities but the force of power has negative relationship to the learning activities. In order to facilitate organizational learning activities by using the force of power, the power of force need to be conduct with the power of influence. Moreover the episodic power and systematic power need to jointly implement to organizational learning activities to achieve organizational innovation. 본 연구는 조직 내 권력 형태와 조직학습활동간의 관계를 탐색해 봄으로써 조직학습활동을 유발시키는 조직 내 권력의 종류 및 특징, 역할을 살펴보고자 한다. 조직 내 권력 형태는 Lawrence와 그의 동료들이 주장한(2005) 일화적 권력(episodic power), 즉 ‘강압(force)’과 '영향(influence)’과 체제적 권력(systemic power), 즉 ‘지배(domination)’와 ‘규율(discipline)’의 틀 속에서 조직 문화적 특성과 결부시켜 재해석 하였다. 한편 조직학습활동은 Crossan과 동료들이 주장한(1999) 상호작용 학습(지식의 축적과정)과 지식의 전이과정으로 보고 앞의 권력적 특징과의 관계를 살펴보았다. 분석 자료는 2011년에 실시된 인적자원기업패널자료를 활용하였다. 결과로는 일화적 권력 중 ‘강압’은 ‘영향’을 통해 상호학습 작용 및 지식 전이를 돕고 직접적으로 조직학습활동에는 정(+)의 영향을 주지 못하는 것으로 나타났다. 아울러 체제적 권력인 ‘지배’는 ‘규율’ 및 ‘영향’에 정(+)의 관계를 보였으며, 조직학습활동에도 긍정적 영향을 주는 것으로 나타났다. 시사점으로는 첫째, ‘영향’이 배재된 ‘강압’은 학습 작용을 일으키는 데 의미가 없으며, 항상 병행되어 일어나야 할 것이며, 둘째, 절차나 규범을 의미하는 ‘지배’는 학습활동을 안정적으로 유지하는 역할을 해야 할 것이다.

Molecular Simulations and Thermodynamic Modeling for Closed-Loop Phase Miscibility of Aqueous PEO Solutions

오석영,양한얼,배영찬 한국고분자학회 2013 Macromolecular Research Vol.21 No.8

Closed-loop (CL) phase miscibility behavior of aqueous poly(ethylene oxide) (PEO) solutions was studied by means of molecular simulations and thermodynamic modeling. We first have performed a molecular dynamics (MD) simulation of PEO-water solutions. A careful MD procedure is established based on the corresponding experiments so that the correct surrounding conditions of the simulated cells are constructed. We computed radial distribution functions, number of hydrogen bonds, energy of mixing, mean-squared displacements, and radius of gyration with respect to the temperature. We found that hydrogen bonds between PEO and water decrease more rapidly than those of water and water with increasing temperature, indicating lower critical solution temperature (LCST) behavior. In the heterogeneous phase temperature range, both mixing energy and radius of gyration showed lower values than those of the homogenous phase, which correspond well with the CL type miscibility behavior. Secondly, a thermodynamic modeling technique is presented to quantitatively describe phase equilibrium, using the energy parameters obtained from molecular simulations. We calculated the CL temperature-composition phase diagram of PEO-water solutions using this modeling method and compared it with the experimental data. The calculated results are also consistent with the experimental data using only one scaling parameter. CL phase miscibility of PEO-water solutions is understood successfully by these two types of studies.

Group Contribution Method for Group Contribution Method for Estimation of Vapor Liquid Equilibria in Polymer Solutions

오석영,배영찬 한국고분자학회 2009 Macromolecular Research Vol.17 No.11

This study introduces a specified group-contribution method for predicting the phase equilibria in polymer solutions. The method is based on a modified double lattice model developed previously. The proposed model includes a combinatorial energy contribution that is responsible for the revised Flory-Huggins entropy of mixing, the van der Waals energy contribution from dispersion, a polar force and specific energy contribution. Using the group-interaction parameters obtained from data reduction, the solvent activities for a large variety of mixtures of polymers and solvents over a wide range of temperatures can be predicted with good accuracy. This method is simple but provides improved predictions compared to those of the other group contribution methods.

배움공동체로서의 기업

오석영 한국배움학회 2010 한국배움학회 학술대회 논문집 Vol.2010 No.1

수처리기계의 신뢰성 향상 방안

오석영,Oh, Suk-Young 한국유체기계학회 2004 한국유체기계학회 논문집 Vol.19 No.4