• 지질학회지
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• 제54권5호
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• pp.501-511
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• 2018

지질공원은 환경적 측면이나 유산적 측면으로도 보존가치가 높다. 이러한 지질공원의 보존과 보호를 위해서는 모니터링과 국민적 관심은 필수적이다. 무인항공기와 SfM 알고리즘의 활용은 인력대비 넓어 관리가 어려웠던 지질공원의 효과적인 모니터링을 가능하게 해주며, 이로부터 파생되는 다양한 공간정보 데이터는 부족했던 지질공원 인지도 향상을 위해서도 활용이 가능하다. 우리는 이를 확인하기 위하여 한탄-임진강권역 국가 지질공원중 하나인 화적연을 사례로 하여 무인항공기와 SfM 알고리즘을 이용하여 3차원 공간데이터를 생성하여 화적연을 측량하였다. 그리고 이 데이터를 가상현실과 3D 프린팅에 적용하고 간단한 온라인 설문조사를 실시하여 지질공원 홍보 가능성을 확인하였다. 최종적으로 지질공원 모니터링을 목적으로 생성된 각 단계별 데이터들을 조사하고 지질공원의 홍보 및 연구를 위한 교차활용방안을 제시하였다.

• 디지털융복합연구
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• 제16권12호
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• pp.21-31
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• 2018

계산과학분야에서 고성능컴퓨팅(HPC)을 활용하기 위해서는 프로그래밍, 알고리즘, 자료구조 등 컴퓨터과학의 지식들과 기술들을 배워야 한다. 본 논문에서는 계산과학분야의 IT교육현황 조사와 설문조사를 통해 고성능컴퓨팅 교육을 개선시키기 위한 정책 방향을 제안하는데 있다. 이를 위해 국내 대학의 물리학, 화학, 생명과학, 지구과학분야의 전공과목 중에서 IT관련 과목 현황과 사용자들의 국내 고성능컴퓨팅 교육에 대한 인식을 조사하였다. 그 결과 계산과학분야의 IT과 목비율은 응용 전공과목에 비해 매우 낮았다. 대학의 교육 요구도는 높게 나왔지만, 대학의 교육 제공 수준은 제일 낮게 나왔다. 또한 대부분의 사용자들은 독학으로 필요한 지식과 기술들을 습득한 것으로 조사되었다. 즉 대학의 역할이 가장 시급하고 중요하며 전문기관과 온라인교육의 역할도 중요하다고 확인하였다.

• 대한한방내과학회지
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• 제39권6호
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• pp.1206-1224
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• 2018

Purpose: This systematic review was planned and performed in order to determine the clinical effectiveness of acupuncture for non-alcoholic fatty liver disease (NAFLD). Methods: We searched related randomized controlled trials in several medical online databases, including China National Knowledge Infrastructure (CNKI), Excerpta Medica dataBASE (EMBASE), Public/Publisher MEDLINE (PubMed), Cochrane Central Register of Controlled Trials (CENTRAL), National Digital Science Library (NDSL), and Research Information Sharing Service (RISS). NAFLD related outcomes were extracted from the included trials and meta-analyzed. Results: From the 8 included trials, the values of the following examinations were extracted: liver ultrasonography, liver CT, body fat CT, aspartate transaminase (AST), alanine transaminase (ALT), gamma-glutamyltransferase (GGT), total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL) cholesterol, high density lipoprotein (HDL) cholesterol, fasting blood sugar (FBS), hosmeostatic model assessment for insulin resistance (HOMA-IR), weight, body mass index (BMI), waist hip ratio (WHR), obesity degree, body fat mass, body fat rate, leptin, malondialdehyde (MDA), and super oxide dismutase (SOD). In the 4 outcomes, cure rate in liver ultrasonography (RR=1.56; 95%CI=1.05~2.31; P=0.03), cure rate in liver CT (RR=2.23; 95%CI=1.33~3.72; P=0.002), TC (MD=-0.78; 95%CI=-1.41~-0.15; P=0.02), and TG (MD=-2.05; 95%CI=-3.88~-0.21; P=0.03), acupuncture was more effective than the control intervention. Conclusions: In this meta-analysis, acupuncture relieved hepatic steatosis, and reduced TC, and TG in NAFLD patients. more well-planned studies are still needed due to the heterogeneity and the considerable methodological flaws in the analyzed trials.

• 직업교육연구
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• 제37권2호
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• pp.145-165
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• 2018

이 연구의 목적은 특수교사의 직무스트레스와 직무만족 간의 관계를 조사하여 특수교사의 직무스트레스를 파악하고, 직무만족을 높일 수 있는 적절한 방안을 제시하는 것이다. 이를 위해 2017년 8월 21일부터 9월 18일까지 약 4주간 217명의 특수교사를 대상으로 온라인 설문조사를 실시하였다. 연구문제는 첫째, 특수교사의 직무스트레스와 직무만족에 대한 배경변인별 차이를 알아본다. 둘째, 직무스트레스가 직무 만족에 미치는 영향을 분석한다. 연구결과는 다음과 같다. 첫째, 여교사가 남교사 보다 직무스트레스가 높고 직무만족이 낮으며, 국 공립학교 교사, 특수학급 교사, 근무기간이 10년 이상, 유 초등학교 교사, 특수학급 교사의 경우도 같은 양상을 보이고 있다. 둘째, 직무스트레스와 그 하위요인들은 상호 간에 유의미한 양의 상관관계를 보였으며, 직무만족과는 유의미한 음의 상관관계를 나타내고 있다. 또한 직무스트레스가 직무만족에 미치는 영향을 확인한 결과 직무스트레스가 증가하면 직무만족은 감소한다. 이러한 결과를 통해 변인별 특수교사의 직무스트레스를 파악하였으며 직무만족을 높일 수 있는 방안을 제시하였다.

• 산업경영시스템학회지
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• 제41권4호
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• pp.138-145
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• 2018

In the field of optimization, many studies have been performed on various types of Vehicle Routing Problem (VRP) for a long time. A variety of models have been derived to extend the basic VRP model, to consider multiple truck terminal, multiple pickup and delivery, and time windows characteristics. A lot of research has been performed to find better solutions in a reasonable time for these models with heuristic approaches. In this paper, by considering realtime traffic characteristics in Map Navigation environment, we proposed a method to manage realistic optimal path allocation for the logistics trucks and cargoes, which are dispersed, in order to realize the realistic cargo mixing allowance and time constraint enforcement which were required as the most important points for an online logistics brokerage service company. Then we developed a prototype system that can support above functionality together with delivery status monitoring on Map Navigation environment. First, through Map Navigation system, we derived information such as navigation-based travel time required for logistics allocation scheduling based on multiple terminal multiple pickup and delivery models with time constraints. Especially, the travel time can be actually obtained by using the Map Navigation system by reflecting the road situation and traffic. Second, we made a mathematical model for optimal path allocation using the derived information, and solved it using an optimization solver. Third, we constructed the prototype system to provide the proposed method together with realtime logistics monitoring by arranging the allocation results in the Map Navigation environment.

• 산업경영시스템학회지
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• 제41권4호
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• pp.203-212
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• 2018

Quality requirements of manufactured products or parts are given in the form of specification limits on the quality characteristics of individual units. If a product is to meet the customer's fitness for use criteria, it should be produced by a process which is stable or repeatable. In other words, it must be capable of operating with little variability around the target value or nominal value of the product's quality characteristic. In order to maintain and improve product quality, we need to apply statistical process control techniques such as histogram, check sheet, Pareto chart, cause and effect diagram, or control charts. Among those techniques, the most important one is control charting. The cumulative sum (CUSUM) control charts have been used in statistical process control (SPC) in industries for monitoring process shifts and supporting online measurement. The objective of this research is to apply Taguchi's quality loss function concept to cost based CUSUM control chart design. In this study, a modified quality loss function was developed to reflect quality loss situation where general quadratic loss curve is not appropriate. This research also provided a methodology for the design of CUSUM charts using Taguchi quality loss function concept based on the minimum cost per hour criterion. The new model differs from previous models in that the model assumes that quality loss is incurred even in the incontrol period. This model was compared with other cost based CUSUM models by Wu and Goel, According to numerical sensitivity analysis, the proposed model results in longer average run length in in-control period compared to the other two models.

• 한국산업보건학회지
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• 제28권4호
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• pp.331-345
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• 2018

Objective: Shift work including night work is known to be harmful to the health of nurses. This study was conducted in order to systematically review the academic literature on the health effects of working time patterns, including shift work or night work, among Korean nurses and propose a research direction for the future. Methods: We searched online academic databases to find relevant papers in domestic and international journals using the keyword terms 'shift work', 'night work', 'night shift', 'work shift', 'nurse', and 'Korea', and reviewed a total of 36 articles. Results: As a result of this literature review, more than half of the articles were found to investigate the health effects between shiftwork and non-shiftwork nurses. A few studies considered the shift type(n=6), frequency of night shift(n=4), and shiftwork duration(n=3) as working time patterns. These studies focused mainly on mental health(n=18) or sleep(n=15). Conclusions: Based on the review results obtained from this study, it is necessary to assess working time patterns of Korean nurses using a variety of variables including night-work-related factors, and various health outcomes should be examined considering the confounder.

• Journal of Microbiology and Biotechnology
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• 제28권12호
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• pp.2046-2056
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• 2018

Phospholipase D has great commercial value due to its transphosphatidylation products that can be used in the food and medicine industries. In order to construct a strain for use in the production of PLD, we employed a series of combinatorial strategies to increase PLD expression in Bacillus subtilis WB600. These strategies included screening of signal peptides, selection of different plasmids, and optimization of the sequences of the ribosome-binding site (RBS) and the spacer region. We found that using the signal peptide amyE results in the highest extracellular PLD activity (11.3 U/ml) and in a PLD expression level 5.27-fold higher than when the endogenous signal peptide is used. Furthermore, the strain harboring the recombinant expression plasmid pMA0911-PLD-amyE-his produced PLD with activity enhanced by 69.03% (19.1 U/ml). We then used the online tool \RBS Calculator v2.0 to optimize the sequences of the RBS and the spacer. Using the optimized sequences resulted in an increase in the enzyme activity by about 26.7% (24.2 U/ml). In addition, we found through a transfer experiment that the retention rate of the recombinant plasmid after 5 generations was still 100%. The final product, phosphatidylserine (PS), was successfully detected, with transphosphatidylation selectivity at 74.6%. This is similar to the values for the original producer.

• 공학교육연구
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• 제21권6호
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• pp.63-73
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• 2018

This research aims to analyze core competencies of engineering students in Korea as well as to explore the application plans of extracurricular activities(hereafter, ECA) and programs in order to enhance their core competencies. Participation in ECA has long been recognized as having positive benefits and impacts upon students. To achieve the purpose of this study, first, we investigated whether there were differences between core competencies in undergraduates according to majors, gender and grades. 'Core competencies', first introduced in management theory as 'core competency' can be defined as personal attributes or underlining characteristics, capable of delivering a role or job. 'Core competencies' has received particular attention in recent years and there has been much related research (domestic and foreign) combined with diverse factors. However, few studies have addressed the question on engineering student's core competencies as well as the ways of their enhancement. This study was conducted with a total of 286 students, and core competencies have been measured online, through K-CESA. Our findings show that firstly, there were significant differences in undergraduate students' core competencies by majors. Engineering students scored significantly lower in core competencies overall. Second, there was no significant difference in students' core competencies by gender and grade. Third, there was a significant correlation among components of core competencies. Finally, there was a significant correlation between core competencies and grades(GPA, grades in major subject & liberal arts subject), rather levels in the correlation were low. Furthermore, the study suggested that the appropriate application of extracurricular activities would enhance core competencies of students.

• International Journal of Internet, Broadcasting and Communication
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• 제11권3호
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• pp.87-94
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• 2019

In the study, we show the annual average increasing rate of death bodies in the capital area was 2.1% while the annual average increasing rate of cremated bodies was 4.5%. As the annual average increasing rate of cremated bodies was about 2.1 times higher than the annual average increasing rate of death bodies, the increase rate of cremated bodies contrast to the increase rate of death bodies was relatively high. Also, the cremation rate of the capital area was increased by 9.5% from 80.3% in 2011 to 89.8% in 2017 while the increase rate of cremated bodies was 27.2%(N=21,694 people) from 79,866 people in 2011 to 101,560 people in 2017. Thus, the increase rate of cremated bodies contrast to the increase of cremation rate of the capital area was relatively very high. On the basis of 2017, the utilization rate of public cremation facilities in by capital area was 94.5% in Incheon Metropolitan City, 91.1% in Seoul Metropolitan City, and 20.9% in Gyeonggi-do, which showed huge differences in the utilization rate of public cremation facilities in the jurisdiction area of by capital area. Focusing on the actual state shown in the results of this study above, it would be necessary for Seoul Metropolitan City to carry forward a supply & demand policy of cremation facilities through the extension of cremation furnaces, for Gyeonggi-do to carry forward a policy to build the public cremation facilities focusing on the basic local government in the jurisdiction area, and for Incheon Metropolitan City to enforce the measures for the joint use of cremation facilities with the basic local government in the adjacent Gyeonggi-do jurisdiction area in order to improve the efficiency of the operation of cremation facilities.