본 연구에서는 평택 미8군 차량정비시설 내 콘크리트 포장의 줄눈부 하중전달효율(Load Transfer Efficiency, LTE)을 평가하기 위해 FWD(Falling Weight Deflectometer)를 이용한 조사･평가를 수행하 였다. 본 연구에서는 <그림 1>에서와 같이 FHWA/TX-07/0-5123-2“Guidelines for Evaluation of Existing Pavement for HMA Overlay”에서 제시한 FWD 처짐 하중전달효율 산정식을 사용하였다. FWD를 이용한 콘크리트 슬래브 줄눈부의 하중전달효율을 조사한 결과는 <표 1>에서 보는 바와 같다. 하중전달효율이 80% 이상인 지점은 97개소로 전체의 약 84.3%에 해당한다. 콘크리트 슬래브 시공 당시 줄눈부에 <그림 2>와 같은 배부름현상(Bulging)이 발생하였다. 배부름현상 이 하중전달효율에 미치는 영향을 파악하기 위하여 총 24개 줄눈부에 대하여 순방향과 역방향으로 <그림 2>와 같이 FWD 시험을 수행하였다. <그림 3>은 각 줄눈부에서 Case 1과 Case 2의 하중전달효율을 비교 한 것이다. 그래프에서 보는 바와 같이 LTE 차이가 ±2% 이내인 경우를 (6개 지점) 제외하고 총 18개 줄 눈부 중 15개 줄눈부에서 Case 1이 Case 2보다 LTE가 큰 것으로 나타나 줄눈부 배부름현상이 LTE에 영 향을 주는 것으로 나타났다.

고분자막이 가진 수투과능 한계와 비가역적 막오염에 의한 효율 저하는 막기반 수처리공정의 추가적인 경쟁력 확보를 위해 해결해야 하는 문제이다. 본 연구에서는 초고속 물투과 특성과 뛰어난 선택성을 지닌 Graphene oxide (GO)막 에 뛰어난 항균성을 가진 은나노(nAg)가 코팅된 막을 제작, 평가하였다. GO막 은 막오염 저감에 효과적일 수 있는 높은 친수성과 음표면전하와 같은 특성과 막오염에 취약할 수 있는 높은 비표면적과 뛰어난 흡착능력과 같은 특성을 동 시에 가진다. 따라서, 논란의 부분이 있는 GO막의 막오염에 대한 저항성의 확실한 향상을 위해 nAg를 적용하였다.

이 논문은 비모수적 자료포락분석 기법을 이용하여 감귤농가의 경영효율성을 추정하였다. 추가적으로 커널밀도함수를 이용하여 경영효율성의 분포가 지난 13년간 어떻게 바뀌었는지도 도식화하였다. 연구를 위해 농촌진흥청에서 조사 발표하는 자료를 사용하였다. 분석결과를 보면, 지난 13년간 경영효율성은 시설 감귤농가와 노지 감귤농가 모두에서 상승하는 것으로 나타났다. 이것은 수입농산물이 증가하는 상 황 하에서 감귤농가의 경영효율성이 개선되고 있음을 의미한다. 경영효율성을 순수기술적 효율성과 규 모 효율성으로 분해한 결과, 순수기술적 효율성은 점차 개선되는 반면에 규모 효율성은 악화되는 것으 로 분석되었다. 하지만 여전히 효율성 개선의 여지는 순수기술적 효율성 측면에 있는 것으로 분석되었 다. 순수기술적 효율성은 꾸준히 계속 향상시키되 적정규모를 찾아가는 노력도 병행해야 할 것으로 보 인다.

The purpose of this study is to investigate production efficiency of Oceans and Fisheries Human Resources Development Programs Efficiency using Bootstrap-DEA. The study extracts 33 officials curriculum, 11 fisheries managers curriculum for its analytical. First, the study estimates technical, pure technical, and scale efficiency of each curriculums based on traditional DEA under the assumption of CRS and VRS. 8(official 7, managers 1) curriculums are identified as efficient DMUs under the CCR-model, and 13(official 10, managers 3) under the BCC-model. We provide inputs that allow inefficient curriculum to be efficient DMUs on a production frontier, and a reference set for their bench-marking. Second, rank test, Wilcoxon-Mann-Whitney test to find a statistical significance of heterogeneity existing in efficiences between Bootstrap-DEA tenical vs Bootstrap-DEA pure technical was no significant difference. We have identified that G10, 11, 12 13, 25, 31, 33, 39 curriculums are the most efficiently produced in the technical and pure technical efficiency. Also we managed to measure the inefficiency which exists in efficiently produced curriculums when estimating the bias corrected efficiency scores. In Technical efficiency, Operation and facility was significant at the 10%. In Pure technical efficiency, facility was significant at the 10%.

The purpose of this study is to assess the effects of outlook project for olive flounder, from the view point of price stabilization, market efficiency, and causality of the prices in different distribution channels. Analytical results show that the volatility of producer price of olive flounder has been significantly mitigated after the implementation of the outlook project. The market efficiency is estimated to be improved after implementing the outlook project although there is an inefficiency on price determination process in some producing regions. The causality test on the producer and wholesale price shows that producing stage leads the wholesale stage in forming the prices. It is found that Jeju leads the flounder price on the size of 500g and 2kg, while Wando leads the price of 1kg size. These estimation result as whole indicate that outlook project for olive flounder has accomplished the intended goals.

The blast hole has a space between explosive and hole wall, and blast forces reaches the hole wall face with a large amount of loss during passing through this space. The loss ratio of blasting forces are different to this packing material of space like air, water, etc. In this study, the effect of packing materials is investigated by the numerical simulation analysis. The simulation is carried out to two phases; 1st phase is to compute the impacting forces reaching on the wall face passing through packing materials(air, water), 2nd phase is to study the blasting effect(block size of cracking, direction of driving forces, etc.) in real site. The reaching force at the wall face in the water is larger than in the air. This study shows that the water as packing materials is superior to the air.

Infrastructure such as tracks, catenary, rolling stock and signaling systems, and close interface with the human factors of train drivers, shunting staff and maintenance staff are required for train operations. Safety management is the most essential part for the functioning of a train. In line with the safety management, each rail operator has a safety guidance system and the Ministry of Land, Infrastructure and Transport operates Railway Safety Inspector system. Safety Inspector System is to train employees working in the field to be aware of rules and regulations, and to improve identified risk factors. Hence, it is necessary to establish systematic training and inspection methods for safety guidance staff and make clear the roles and responsibilities of safety inspectors according to the Occupational Safety and Health Act, and safety instructors for several inspections according to the Railroad Safety Act.

PURPOSES: The objective of this study is to determine the milling temperature that minimizes the binder-induced damage to the aggregate; this is achieved by evaluating the temperature dependence of the viscosity of the asphalt binder, with the aim of developing an effective heating process for warm in-place recycling. METHODS : The validity of the indoor test was confirmed by conducting an internal heating test based on the on-site heating test. In addition, the adhesive power of the binder was measured at various temperatures (30℃, 40℃, 50℃, 60℃, 70℃) via three types of measuring methods. RESULTS: The surface temperature spectrum of field test was slight different with that of laboratory test. But, the spectra of inner temperature between the field and the laboratory was almost similar. Also, the adhesion of the asphalt binder was measured from 30℃ to 70℃. The adhesion of the binder was significantly decreased from 60℃. Contrary to other temperature, the adhesion was slightly changed from 60℃ to 70℃. Also the inner temperature between two different heating methods was shown similar temperature spectra. CONCLUSIONS: The pavement heating temperature spectrum of hot in place recycling method was simulated by a laboratory test. Based on this study, the optimum temperature was 60℃~70℃ for reducing aggregate damage during milling process. The susceptibility heating method developed in this study can be maintained the optimum inner temperature range.

Logistics had only been perceived as a supporting means or auxiliary of corporate activity, but is now surfacing as a priority sector for competitiveness in the infinite competition of the global market. This study looks into the current status of logistics and sets forth the improvement tasks by analyzing the problems of the returned goods logistics. In order to improve the manual process of returned goods, the POS system (point-of-sales system) was implemented and DAS (Digital Assorting System) and SORTER System were synchronized for utilization, which cut the prime cost of the once expensive returned goods logistics, and analyzed the efficiency of establishing automated logistics system for efficiency of returned goods logistics in the aspects of one-stop BPR (Business Process Re-engineering).

Semiconductor manufacturing has suffered from the complex process behavior of the technology oriented control in the production line. While the technological processes are in charge of the quality and the yield of the product, the operational management is also critical for the productivity of the manufacturing line. The fabrication line in the semiconductor manufacturing is considered as the most complex part because of various kinds of the equipment, re-entrant process routing and various product devices. The efficiency and the productivity of the fabrication line may give a significant impact on the subsequent processes such as the probe line, the assembly line and final test line. In the management of the re-entrant process such as semiconductor fabrication, it is important to keep balanced fabrication line. The Performance measures in the fabrication line are throughput, cycle time, inventory, shortage, etc. In the fabrication, throughput and cycle time are the conflicting performance measures. It is very difficult to achieve two conflicting goal simultaneously in the manufacturing line. The capacity of equipment is important factor in the production planning and scheduling. The production planning consideration of capacity can make the scheduling more realistic. In this paper, an input and scheduling rule are to achieve the balanced operation in semiconductor fabrication line through equipment capacity and workload are proposed and evaluated. New backward projection and scheduling rule consideration of facility capacity are suggested. Scheduling wafers on the appropriate facilities are controlled by available capacity, which are determined by the workload in terms of the meet the production target.

Currently many geriatric hospitals have been built in Korea because increasing aging rapidly. However the increasing geriatric hospitals make the increasing safety accidents. Therefore this study is conducted by survey and face-to-face talk with the fire safety managers for analyzing safety problem of geriatric hospitals which number is twelve among 15 geriatric hospitals in the north of Chung-buk area. The result of this study is that geriatric hospitals are very old. Fire safety managers holding the fire safety license are a level 2 issued by the Korea Fire Safety Association(KFSA). And the fire safety inspection ability of them is normal (58%). Furthermore a fire safety budget ratio is 83% (A little) in the company yearly budget. And ratio having the fire inspection equipment in the building is 42% (A little) and 33% (Nothing). Satisfaction ratio of their duty is 66% and they also get stress from heavy duty and heavy responsibility. In conclusion, CEO needs to invest and interest the improvement of job performance, satisfaction ratio and fire safety facility. Also government needs the improvement of system to support and supervise the fire safety of geriatric hospitals consistently.