• 한국물환경학회지
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• 제22권2호
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• pp.238-243
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• 2006

In order to improve the water quality of stream water, the facilities equipped with rope media filter have been examined as a part of national projects. This work may provide design and operating parameters from 2 years monitoring for 2 streams. Depending on the characteristics of streams, the flow rate into the facilities were shown different, where K stream was almost the same and D stream was less than 25% of design flow rate. Although the clogging of filter media was not observed during the operation, the removal of accumulated sludges was required for the stable operation. The removal efficiencies of BOD, SS, T-N and T-P for D stream were 60.5%, 80.1%, 25.2% and 36.2%, respectively. The most important factor for the construction of stream water purification facilities was recommended for the selection of proper sites.

• 조명전기설비학회논문지
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• 제29권12호
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• pp.88-96
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• 2015

This paper describes a new method for enhancing the accuracy of network analysis applications in energy management systems. Topology processing, state estimation, power flow analysis, and contingency analysis play a key factor in the stable and reliable operation of power systems. In this respect, the aim of topology processing is to provide the electrical buses and the electrical islands with the actual state of the power system as input data. The results of topology processing is used to input of other applications. New method, which includes the topology error analysis based on inconsistency check, coherency check, bus mismatch check, and outaged device check is proposed to enhance the accuracy of network analysis. The proposed methodology is conducted by energy management systems and the Korean power systems have been utilized for the test systems.

• 한국병원경영학회지
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• 제15권1호
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• pp.27-48
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• 2010

The purpose of this paper is to analyze the efficiency change and its determinants of the regional public hospitals. We utilize 34 regional public hospital's panel data for 6 years from 2003 to 2008. We use DEA(Data Envelopment Analysis)-CCR, BCC model, DEA/Window model, and DEA Profiling. The empirical results show the following findings. First, technical efficiency shows that approximately 3.6% of inefficiency exists on the regional public hospitals and it reveals that the cause for technical inefficiency is due to scale inefficiency. Second, DEA/Window results show that the stable dissimilarity by standard deviation, LDP of CCR. Third, the results of partial efficiency by DEA Profiling show that increase efficiency depends on the number of beds, doctors, and nurses.

• 한국물환경학회지
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• 제22권3호
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• pp.456-461
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• 2006

The facility of constructed wet land combined with filter media was examined in order to improve the water quality of a polluted stream, which has been performed as a part of national projects. Throughout 2 years of operation for a stream, it can provide the design and operating parameters for the purpose of future construction. The influent flow rate was about 50% against the design capacity. The removal efficiencies of BOD, $COD_{Mn}$, SS, T-N and T-P were 62.9%, 47.1%, 74.8%, 22.4% and 33.5%, respectively. In order to keep this facility stable, the removal of surface filter media and supplement should be periodically conducted. In addition, the proper selection of sites is recommended not to be flooded.

• 한국컴퓨터정보학회논문지
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• 제11권3호
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• pp.97-105
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• 2006

변화하는 기업 환경에 효과적으로 대응하기 위해서는 우리나라 중견 제조업 환경에 적합한 생산 마스터 정보관리 솔루션 도입이 시급하다 따라서 본 논문에서는 사용하기 편리한 사용자 인터페이스를 가지며, 다양한 시스템들과도 쉽게 연동할 수 있도록 표준 데이터 구조를 설계하였다. 또한 표준 데이터 구조를 중간언어 형태로 생성해 주는 자동화 연동 모듈을 탑재하고, 생산 관리 데이터의 확장이 가능한 생산 마스터 정보관리 솔루션을 개발하였다. 본 개발을 통하여 업무적으로는 관리하지 않았던 데이터를 관리함으로써 보다 효율적인 업무 프로세스 구성을 이룰 수 있을 뿐만 아니라 시스템 확장 시 보다 안정적인 시스템 구축을 위한 근간을 제공할 수 있다.

• 산업융합연구
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• 제13권3호
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• pp.41-56
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• 2015

People have relatively continuous and stable characteristic and it can help understand personal attitude and behavior. As individual has individual personality and society has culture, in case of organization, there is organization culture that means unique cultural characteristic. And as if we need to know culture of that society to understand individual, we need to know organization culture of that organization to understand any organization. The reason why organization culture is acknowledged as modern theory of business management is-modern company has proposed management innovation, organization activation, company transformation, and company reprogramming as management strategy to cope actively with various and quickly changing environment that modern company face-that organization culture and management innovation, that is, the concept of new business management is highlighted for means and tools to solve such problems. Seeing contemporary situation, although organization culture of small company is being improved by management innovation, cause and effect that organization culture affect technique innovation still insufficient. The meaning of this research is, through a good example of organization culture, providing reason that efficient organization culture affect technique innovation of small company(medium and small company) and making people understand why this effect occur. Through this, I want to provide strategy and policy implication of company.

• Safety and Health at Work
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• 제13권2호
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• pp.235-239
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• 2022

Background: The purpose of present study was to determine the effectiveness of training program based on job stress management in NEDSA and line staff. Methods: The study method of this study was quantitative and quasi-experimental research Methods: From the statistical population (all employees of the NEDSA and line staff in 2020-2021), 30 of these people were selected by judgmental sampling method and considering the inclusion and exclusion criteria. The participants were first matched based on age and education and were randomly divided into experimental and control groups. First, pre-test was taken from both groups (Job Stress Questionnaire). The experimental group was presented with a job stress management training package and no protocol was presented in the control group. After the sessions, post-test was received from both groups (experimental and control). After two months, a follow-up test was performed. Results: The results were entered into SPSS-24 software and analyzed. The results of repeated measure showed high effectiveness of the job stress management package (researcher-made). The results showed that the job stress management training package showed 67.5% effectiveness and also the training effect of job stress management training was stable for two months (follow-up). Conclusion: Based on these results, Training program based on stress management can be effective in military staff.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.499-505
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• 2009

Along with the changing pattern that the construction project is getting complicated, large-scaled and up-to-dated, necessity of efficient management of manpower and resources of the construction site is being increased. In particular, considering that the construction site requires a lot of labor force and in terms of the construction cost, labor cost shares 30-40%, labor management has become a very important factor. In this study, in order to support a stable and successful construction project implementation and supplement the existing system being utilized at the current site, construction site access management automation system based on hand vascular pattern, a biometrics system, is intended to be developed. Relevant theory for the system development and the problem of existing RFID system were evaluated and based on this findings, a system design and DB composition chart were envisaged. In addition, by applying this developed system to a number of sites, its result was analyzed

• 한국건설관리학회논문집
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• 제14권1호
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• pp.23-31
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• 2013

서브프라임 금융위기 이후 주택시장이 침체되면서 2000년대 초반과 같이 주택투자로 고수익을 올릴 수 있는 시기는 앞으로 찾아오지 않을 가능성이 이제 점차 높아지고 있다. 이에 따라 과거 고수익의 원천이 되었던 부동산 시장은 점차 수익형 부동산 등 안정적 수익을 획득할 수 있는 투자시장으로 변모하고 있다. 이에 따라 대표적인 간접투자상품인 리츠의 시장규모는 더욱 커질 것으로 판단된다. 그러나 아직까지 리츠시장은 일반적인 주택투자시장 및 금융시장보다 훨씬 더 그 성장이 미미한 실정이다. 하지만 포트폴리오 이론을 토대로 한 위험관리의 중요성이 투자의 매우 중요한 개념을 자리잡고 있는 바 리츠의 안정적인 수익 창출은 포트폴리오의 위험관리에 효과적일 것으로 판단된다. 이러한 관점에서 본 논문에서는 주식시장의 다양한 업종들 중 상대적으로 안정적인 수익을 확보할 수 있는 리츠가 포트폴리오에 편입되었을 때 위험 분산 효과를 실증분석하는 것을 목적으로 한다. 분석결과에서 확인할 수 있듯이 대표적인 경기방어주인 음식료업종과 마찬가지로 리츠업종 역시 전체 시장을 나타내는 코스피와 상관계수값이 상대적으로 낮은 것으로 나타났으며 최소분산포트폴리오로 구성했을 경우에도 표준편차가 매우 낮게 나오는 등 음식료업종과 같이 투자포트폴리오에 편입했을 경우 위험분산 효과를 기대할 수 있을 것으로 판단된다. 투자시장은 향후 미래의 불확실성에 따라 항상 위험을 감수해야 함에 따라 위험 대비 수익이 어느 정도인지가 매우 중요하다. 이러한 관점에서 리츠를 활용하여 포트폴리오를 구성할 경우 위험분산 효과를 획득할 수 있는 바 충분히 그 투자 효용성을 가지고 있을 것으로 판단된다.

• Journal of Trauma and Injury
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• 제27권4호
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• pp.145-150
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• 2014

Purpose: To assess the accuracy and role of single-contrast computed tomography (CT) in the management of anterior abdominal stab wound (AASW). Methods: During 8-years period, single-contrast CT was performed in 21 hemodynamically stable AASW patients (age range, 22-64 years; median age, 45 years), including 19 men and 2 women. CT scans were evaluated by one trauma surgeon and one senior resident to determine the depth of injury(peritoneal violation or not), and abnormal findings of intraperitoneal cavity associated with stab injury. We retrospectively reviewed medical records regarding operative findings. Results: Nine patients underwent abdominal surgery and 12 patients nonoperative management. In the abdominal surgery group, abnormal CT findings included peritoneal violation in 14 patients and abnormal intraperitoneal cavity findings in 5 patients. There was no statistical significant difference regarding abnormal CT findings between abdominal surgery group and nonoperative management group. Among the nine abdominal surgery patients, therapeutic laparotomy was performed on 4 patients. The positive predictive value (PPV) and negative predictive value (NPV) of peritoneal violation to predictive therapeutic laparotomy were 28.6% and 100%, respectively. In addition, the PPV and NPV of abnormal intraperitoneal cavity CT findings to predict therapeutic laparotomy were 40.0% and 87.5%, respectively. There was no statistical significant difference regarding the abnormal CT findings between therapeutic laparotomy group and non therapeutic laparotomy group. Conclusion: CT is a good adjunctive method to evaluate hemodynamicaly stable AASW patients. If peritoneal violation is not seen on CT scan, conservative treatment on local wound may be safely performed without additional abdominal surgery. However, further study is warranted to evaluate the exact role of CT in the diagnostic workup of AASW patients.