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에머지 방법론을 이용한 영산강 하구생태계의 기여 가치 평가
강대석,Kang, Daeseok 한국해양학회 2013 바다 Vol.18 No.1
에너지 관점에서 생태계의 가치를 평가하는 에머지 개념과 방법론을 이용하여 영산강 하구해역 생태계가 우리 경제에 기여하는 가치를 시스템 관점과 생태계 서비스 관점에서 평가하였다. 하천과 바다가 만나서 형성되는 하구생태계의 특성을 반영하여 하천의 화학에너지가 유입에머지 총량($9.42{\times}10^{20}$ sej/yr)의 73%로 가장 많은 에머지를 공급하였으며, 조석에너지는 27%를 기여하였다. 영산강 하구생태계로 유입하는 자연환경에너지를 이용하여 시스템 관점에서 영산강 하구가 경제에 기여하는 가치를 평가한 결과 약 1,799억 em\/yr(1,491만 em\/ha/yr 또는 13,526 em$/ha/yr)으로 나타났다. 영산강 하구생태계가 제공하는 서비스의 가치는 수산물생산, 오염정화, 심미 기능, 과학연구의 네 가지만을 대상으로 평가하였다. 이 가운데 심미 기능의 가치가 1,799억 em\/yr으로 가장 높았으며, 수산물생산(1,011억 em\/yr), 오염정화(326억 em\/yr), 과학연구(9.3억 em\/yr)의 순으로 나타났다. 에너지를 이용하여 자연환경과 경제활동을 평가하는 에머지 방법론의 특성을 반영하여 이 연구에서 평가한 영산강 하구의 생태계 서비스 가치는 경제학적 방법을 이용한 평가보다 높았다. An emergy concept was used to evaluate the contributions of the Youngsan River Estuary to the Korean economy from systems and ecosystem service perspectives. Total emergy input to the estuary was $9.42{\times}10^{20}$ sej/yr with the chemical potential of river inflow accounting for 73% of the total and tidal energy for the remaining 27%, reflecting the unique environmental characteristics of estuaries where rivers meet sea. From the systems perspective, the estuary ecosystem contributed 179.9 billion em\/yr (14.91 million em\/ha/yr or 13,526 em$/ha/yr). Four ecosystem services of the Youngsan River Estuary were selected for the emergy evaluation: fishery production, pollutant removal, aesthetic function, and scientific research information. Aesthetic function contributed the most to the Korean economy with 179.9 billion em\/yr, followed by fishery production (101.1 billion em\/yr), pollutant removal (32.6 billion em\/yr), and scientific research information (934 million em\/yr). Emergy-based values of the selected ecosystem services of the estuary were higher than those calculated by economic methodologies.
비인격적 감독과 외국인근로자들의 문화적응: 지각된 역량발휘가능성 및 직업배태성의 매개역할
강대석 ( Daeseok Kang ),김정은 ( Jeongeun Kim ) 한국생산성학회 2017 生産性論集 Vol.31 No.4
Abusive supervision could be viewed as more than just one form of negative feedback or personal insult, especially to foreign workers. Migrant workers who perceived their supervisors were more abusive are less likely to experience job stability and therefore failed to adapt to the host society. In this regard, this study examined how abusive supervision influences foreign workers’ acculturation i.e. integration along with the mediating role of perceived competence mobilization (PCM) and job embeddedness in the relationship. Valid and reliable self-report evaluation measures were collected from a sample of 225 foreign workers in South Korea. Immigration rules allow them to live in Korea for up to 4 years and 10 months on their first E-9 visa. After which they can get the chance to change this visa into E-7, to live and work in Korea continuously. However, these workers find it difficult to change their visa from E-9 to E-7. Without their employer's help, it becomes extremely difficult because the requirements are quite stringent. Following data collection, the models in the present study were tested by implementing a structural equation modeling (SEM) approach, using maximum likelihood estimation and a covariance matrix based on item parceling as input. The results indicate that the direct path between PCM and acculturation was nonsignificant, and the hypothesized model fit was not substantially improved as compared to the full mediation model. The best-fit model was the full-mediation model that included indirect effects of abusive supervision and a path from PCM to acculturation through job embeddedness. Based on these findings, it is suggested that managers need to pay attention to the role of foreign workers' job embeddedness through perceptions of competence mobilization in their acculturation.