• 한국전자통신학회논문지
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• 제8권10호
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• pp.1561-1571
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• 2013

국방부에서는 정보화된 군사시설 이전이 어느 때 보다 필요하다. 주민들은 군사시설이 이전해 오는 것은 부정적으로 생각하고 있다. 연구결과 대부분의 주민들은 군사시설이전을 긍정적으로 생각하고 있는 반면 일부 주민들은 부정적으로 생각하고 있었다. 국방부에서는 본 연구를 참고하여 주민과의 관계를 개선 한다면 향후 군사시설이전이 용이할 것으로 본다.

• Industrial Engineering and Management Systems
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• 제9권2호
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• pp.165-177
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• 2010

This paper discusses a method for pricing the storage of inbound containers in a container yard. The pricing structure is characterized by a free-time-limit and a storage price for the storage time that extends beyond the free-time-limit. A cost model is developed from the viewpoint of a public terminal operator as well as a private terminal operator. Unlike a previous study on this issue, this study assumes that the retrieval times follow a discrete probability distribution, which is more realistic than the previous study. A solution procedure is suggested and illustrated by using numerical examples.

• 한국컴퓨터정보학회논문지
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• 제23권11호
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• pp.151-158
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• 2018

As the competition of 21 cyber universities in Korea has been on a continual increase, they are focusing on improving the quality of the e-learning education in cyber universities. In this study, we intended to derive the failure factors of the previous chatting system in the 2010s and the success factors from previous studies. Next, we identified priorities among five factors(Reliability, UI Convenience, Usability, Network effect, Operational policy) using AHP and the practical ways to implement the chatting service. We applied the chatting system to all the curriculums of S cyber university. Our study finds that the chat service affects the satisfaction of education. Finally, we propose the utilization plan to improve the e-learning education of cyber university through the findings of this research.

• 유통과학연구
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• 제12권4호
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• pp.73-83
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• 2014

Purpose - This study aims to classify and extend the consumer value of movie theaters into various values such as functional value, emotional value, social value, epistemic value, and conditional value based on the theory of consumption value by Sheth, Newman and Gross (1991). It also aims to verify the path structure of consumption value→customer satisfaction→behavior intention of movie theaters to confirm its generalization. Research design, data, and methodology - This study was conducted by collecting data on Kimpo university students from various areas in Incheon, Northern Seoul, Ilsan, Kyonggi Province, and Kimpo City. The survey was conducted by distributing 280 survey papers from Oct. 5 to 15, 2013 and collecting 238 of them. The final analysis used 208 questionnaires, after excluding 30 invalid responses. The statistical analysis of this study used the SPSS 19.0 statistics package. Results - The results of the survey are as follows: First, consumption values of movie theaters are classified into the following five groups: functional value, emotional value, social value, epistemic value, and conditional value. This study verified that consumption values play a role as a previous variable of customer satisfaction. Second, functional value, emotional value, and epistemic value have positive effects on customer satisfaction. On the other hand, social value and conditional value do not affect customer satisfaction. Finally, customer satisfaction has a positive impact on behavior intention. Theater users have an intention to re-use or recommend the movie theater they used when they are satisfied with a movie theater's physical environment and services. Conclusions - This study can provide academic and practical implications as follows based on the results mentioned above. First, academic implications can be found in that consumption values of movie theater users are classified into five values based on the theory of consumption value by Sheth et al. (1991). In the previous study, the service quality of a movie theater was studied based on the service quality of service encounters and a physical environment→customer satisfaction→behavior intention path structure. However, this study was verified by a consumption value→customer satisfaction→behavior intention path structure to classify consumption value, but not service quality or perceived value of quality, to confirm this generalization. Second, practical implications can be found in that the relative impact of consumption value of movie theaters on consumer satisfaction showed that functional value was followed by epistemic value and emotional value. In the previous study on movie theaters, previous variables of customer satisfaction were separated only by functional service quality including service encounters and physical environment; in some other studies, quality of service encounter had a direct effect on customer satisfaction. Accordingly, a marketing manager of a movie theater should develop various differentiated services by reflecting not only functional value such as service encounters and physical environment but also epistemic value and emotional value.

• 물과 미래
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• 제10권2호
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• pp.91-100
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• 1977

This is an experimental study to raise higher efficiency of filteration than conve ntional filteration by increasing of filteration capacity for per unit area and by extending of filteration lasting time with biflow filter system which was improved from the conventional rapid sand filteration method in the process of water purification treatment. In order to raise more efficient function of filteration and giving consideration to the filter layer at upper and lower parts of the filter, the fine sand & an thracite were used as a filter medium. Although there is some difficulty than previous fine sand in procurement, it could confirm that such filter medium (fine sand & anthracite) was more effective in the field of load, lasting time and back wash, etc. In consideration of practical effect of filteration. The raw water which was used for this experimental study was not coagulated. As a result of this experiment, the filteration volume could increase more than 2 times than that of conventional method. Besides, much more advantages could be obtained for instance, the requirement of installation area was not much and installation cost could economize. On the other hand, the following results were found. The quality of filtered water became worse as time goes by and the turbidity of filtered water was more influenced by raw water turbidity than by rate of filteration. Lasting time of filteration on change of filteration rate in the filter layer reached 2 times in comparison with previous filter basin, and until loss gead reached to 1.0 meter and 1.5 meter, the following relate formulas between lasting time and rate of filteration were formed. ($T_{1.5}=181.96V^{-0.46},\;T_{1.0}=121.31V^{-0.46}$) Even though the lasting time can be shorten in case of the increase of the filteration rate, but the lasting time was prolonged more than 2 times than of previous method. With taking aim at contribution to the development of water treatment technique, we are planning to study continuously for the future study basing on the results in this papers.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.573-580
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• 2003

In Taiwan there are 21 Municipal Solid Waste Incinerators (MSWI) built to treat 80% of the MSW nationwide. Approximately 2,000 tons of incineration ashes of municipal waste contain reaction ash and fly ash (3:1 by weight)will be produced daily, and this may cause a serious waste problem. According to EPA regulations, reaction ash and fly ash produced after incineration should be properly treated. Landfill capacity barely meets the general demands. More efficient actions should be planned and taken. The study found 'reclamation' should be the optimal solution to this problem. Only limited research and previous successful experiences are available among other countries. An incinerator in Northern Taiwan is chosen for this study to make environmental bricks from the reaction ash and fly ash. From the previous tests, the results of strength test were measured. From the previous test results, the fly ash products have not reached the desired strength; hence, reaction ash is chosen for further pilot study. In the experiment, incineration ashes, cement and gravel are mixed in the ratio of 1:1:1(by weight), to ground concretization aggregate and pelletization aggregate, the concrete products made from the aggregates were of the strength of 108 $kgf/cm^2$ and 142 $kgf/cm^2$ individually. For the purpose of making nonstructural walls which met the State Building Standards. In the study, 50 tons of concrete products was yielded from aggregate and environmental bricks. Further observation and supervision are recommended to ascertain the resource recycling and reclamation. EPA has planned to build three 'Recycling Plants' in northern, middle and southern Taiwan to develop efficient techniques to produce concrete products, sub-base course, soundproofing wall, gravel, artificial fishing reefs, tiles, drainage, bricks and etc. This experiment of the demonstrative plant solves the problem of the incineration ashes and opens another opportunity to reclaim them.

• 대한인간공학회지
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• 제32권5호
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• pp.459-467
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• 2013

Objective: The aim of this study is to review the studies on job rotation with various points of view and to classify the studies considering the approach methods. Background: Various work interventions were carried in order to prevent the work-related musculoskeletal disorders(WMSDs) and job rotation was considered as one of the simple and effective methods. Method: Previous studies were systematically collected with the combination of keywords such as job, task, rotation, allocation, line balancing, etc. Collected studies were classified into three categories: field study, laboratory study and optimization approach study. Results: Field studies showed that most studies focused on the evaluation of the factors causing the musculoskeletal disorder. Moreover, the effect of job rotation could be hard to identify because it required a long-period close observation. Laboratory studies covered only simple aspects of tasks or movements. Optimization approach studies showed the systematic approach to establish the job rotation scheme though many limitation and assumptions were adopted. Conclusion: This study collected and classified the previous studies on job rotation and presented the different approaches across various research areas. Application: The results of this study could help the practitioner and ergonomist how to establish the job rotation scheme.

• 한국산학기술학회논문지
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• 제18권6호
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• pp.646-652
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• 2017

본 연구는 한국 아동 청소년 패널조사를 활용하여 청소년의 우울과 신체화 증상에 대한 종단적 상호 인과관계를 자기회귀교차지연 모형을 통해서 확인하기 위해 실시하였다. 본 연구의 대상자들은 한국청소년정책연구원에서 실시하는 한국 아동 청소년 패널조사 2011년 2차, 2013년 4차, 2015년 6차에 모두 참여한 1968명의 청소년들을 대상자로 선정하였고, SPSS 18.0 프로그램과 AMOS 18.0 프로그램을 이용하여 자료를 분석하였다. 연구결과, 이전 시점의 우울과 신체화 증상은 모두 다음 시점의 우울과 신체화 증상에 영향을 미치는 것으로 나타났으며, 이전 시점의 우울은 다음 시점의 신체화 증상의 교차지연효과에도 영향을 미치는 것으로 나타나 이전 시점의 우울의 정도가 높을수록 다음 시점의 신체화 증상의 정도가 높아지는 것으로 나타났다. 또한 이전 시점의 신체화 증상은 다음 시점의 우울의 교차지연효과에도 영향을 미치는 것으로 나타나 이전 시점의 신체화 증상의의 정도가 높을수록 다음 시점의 우울의 정도가 높아지는 것으로 나타났다. 본 연구는 청소년의 정신건강 간호중재를 위한 기초자료를 마련했다는데 의의가 있으나, 인지적이고 심리적인 요인들은 다양한 요인들에 의해 변화하기 때문에 이와 관련된 종단적 연구들도 필요하다고 생각한다.

• 한국사회복지학
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• 제69권3호
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• pp.35-63
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• 2017

본 연구는 자살예방 연구의 기초자료 제공과 자살생각의 예방 및 치료 방안 모색을 위해 수행하였다. 전국 16개 시/도 지역을 대상으로 한 한국복지패널 자료를 활용하여, 65세 이상 노인의 자살생각에 생태체계 변인과 이 생태체계 변인들의 변화가 미치는 영향을 살펴보았다. 그리고 전년도 자살생각 여부에 따라 어떠한 차이가 있는지도 비교하였다. 분석결과, 노인의 자살생각에는 개인체계, 가족체계, 사회체계 등 각 생태체계 변인들이 영향을 미쳤는데, 전년도의 자살생각 여부에 따라 그 영향요인이 다른 것으로 나타났다. 이와 같은 결과는 노인의 자살문제에 대한 정책 방향이 개인차원의 접근보다 개인, 가족, 사회 등 다차원적인 접근이 필요하고, 자살생각 여부와 같은 노인들이 처한 상황이나 상태에 따라 서비스의 지원형태가 달라져야 할 필요가 있음을 시사한다. 특히, 많은 요인들이 전년도에 자살생각을 한 노인에게는 영향을 미치지 않지만, 전년도에 자살생각을 하지 않은 노인에게는 영향을 미친다는 점을 고려할 때, 자살생각에 대한 사전적이고 예방적인 지원이 보다 실효성 있는 정책을 담보할 수 있을 것임을 보여준다.

• 한국수자원학회논문집
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• 제49권10호
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• pp.835-849
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• 2016

최근 피해가 점차 심해지고 있는 가뭄을 경감하기 위해서는 가뭄모니터링 뿐만 아니라 정확한 가뭄전망이 수행되어야 한다. 본 연구에서는 국내 기존 MSWSI의 한계점을 개선하였으며, 개선된 MSWSI를 이용하여 앙상블기반 확률론적 가뭄전망을 수행하였다. 우선 금강유역 내 존재하는 모든 수문기상인자를 조사하여 각 유역별로 기존 MSWSI에서 적용한 4개 인자(하천유량, 지하수, 강수, 댐유입량)와 적합한 인자(댐저수위, 댐방류량)를 추가 선정하였다. 두 번째로 기존에는 정규분포만을 적용하였으나 본 연구에서는 각 수문기상인자들에 적합한 확률분포를 추정하였다. 강수와 하천은 대부분 Gumbel 분포, 댐유입량, 방류량, 저수위는 2 매개변수 대수정규분포, 지하수는 3 매개변수 대수정규분포를 따르는 것으로 나타났다. 개선된 MSWSI를 과거 실측강수, 하천유량 등을 이용하여 검증한 결과 기존 MSWSI보다 개선된 MSWSI가 과거 발생한 가뭄현상을 더 잘 나타내어 개선된 MSWSI가 효용성이 있음을 확인하였다. 마지막으로 개선된 MSWSI를 이용하여 앙상블기반 확률론적 가뭄전망을 극심한 가뭄이 발생한 2006년과 2014년을 대상으로 수행하고 검증하였으며, 기존보다 개선된 MSWSI를 이용한 가뭄전망이 우수한 결과를 나타냈다. 또한 대부분의 소유역에서 실제 가뭄의 가뭄지수가 개선된 MSWSI를 이용한 가뭄전망 범위에 속하는 것으로 나타났다.