• Journal of Navigation and Port Research
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• v.42 no.3
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• pp.217-226
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• 2018

International major container terminals are trying to expand automation facilities in order to dominate the competition and grow as central harbors. Recently, system design and development were put underway to fully integrate automation systems in container terminals. This is because it can focus on improving the efficiency of the yard operations in container terminals and facilitates integration with other container terminal operation processes. Automation in the container terminal business today is essential to better serve customers and improve profitability. Real-time position and status of container handling equipment (CHE) have been required for more efficient terminal operations and consequently higher productivity. This study examined the real-time location and status of the container terminal automation equipment using DGPS in container terminals, and reviewed the components and functions of the container terminal automation yard equipment systems that developed, applied, and operated the automation systems. In addition, this study compared the existing yard system and the automation yard system and presented application methods. Also, the results revealed that the productivity of the container terminal and the efficiency of the transportation equipment can be further increased when the optimal yard automation transportation equipment system is used to efficiently operate the transportation equipment, which is the core equipment of the container terminal.

• Journal of Navigation and Port Research
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• v.44 no.4
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• pp.305-311
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• 2020

Rising sea levels along the coast from global warming causes the increase of wave energy along the coast. This rise in sea levels results in relatively deep water levels, which would incur the loss of sand that had not occurred in the past from erosion in coastal areas. Generally, it has been challenging to protect against coastal erosion, and the slope, cross-sectional shape, and materials are selected for the site conditions depending on the change in external forces. However, the application of counter measures based on insufficient understanding of the phenomenon is causing various damage, indicating the need for technological development and converging technologies to improve credibility. In this study, we developed eco-friendly permeable biopolymer concrete blocks to control the coastal erosion by using the Bio-Coast, an effective porous structure that mitigates the destructive erosion caused by the rising sea levels. The hexagonal design of Bio-Coast was derived from the honeycomb, columnar joints, and clover, which are durable and stable structures in nature, and the design was changed to apply bumps on the Bio-Coast filling in the form of a clover to reduce wave overtopping and run-up. Applying the field condition of beaches on the east coast of Korea, the block weight and size were decided and the prototype blocks were manufactured and are ready for field placement. In particular, it is intended to protect coastal areas from destructive erosion by natural and artificial external forces, and to extend the design to river,s lakes, and natural walking trails, to improve the efficiency of quality control and process control through the use of blocks.

• Korean Chemical Engineering Research
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• v.49 no.2
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• pp.129-136
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• 2011

Simulated Moving Bed(SMB) process consists of multiple chromatographic columns, which are usually partitioned into four zones. Such a process characteristic allows a continuous binary separations those are impracticable in conventional batch chromatographic processes. Compared with batch chromatography, SMB has advantages of continuity, high purity and productivity. Various researches have been reported for the integration of reaction and recovery during process operation on the purpose of economics and effectiveness. Simulated Moving Bed Reactor(SMBR) is introduced to combine SMB as a continuous separation process and reactor. Several cases of SMBR have been reported for diverse reactions with catalytic, enzymatic and chemical reaction on ion exchange resin as main streams. With an early type of fixed bed using catalyst, SMBR has been developed as SMB using fluidized enzyme, SMB with immobilized enzyme and SMB with discrete reaction region. For simple modeling and optimization of SMBR, a method considering convection only is possible. A complex method considering axial dispersion and mass transfer resistance is needed to explain the real behavior of solutes in SMBR. By combining reaction and separation, SMBR has benefits of lower installation cost by minimizing equipment use, higher purity and yield by avoiding the equilibrium restriction in case of reversible reaction.

• Korean Journal of Construction Engineering and Management
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• v.13 no.2
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• pp.58-69
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• 2012

In modern society, rooftops and underground spaces are utilized for overcoming a confined space limitation of metropolitan areas. Therefore, floor covering construction is also increasing steadily. From the user's viewpoint, skid resistance performance of floor covering methods is a very important performance criterion for safety and amenity, but an appropriate design and assessment criteria for skid resistance performance are not available. This study presents the skid resistance performance assessment method of floor covering methods considering the sidewalk skid resistance standard of Seoul city and the guideline of the Ministry of Land, Transport and Maritime Affairs(MLTM) of Korea for road safety facilities'installation and maintenance. For this research, three alternatives among urethane floor covering methods are selected and their skid resistance performance is analyzed through an experimental study. The analyzed performance is also evaluated by the skid resistance performance assessment method. Finally, the comprehensive performance assessment including the results of skid resistance performance assessment is conducted by Value Analysis(VA) in order to encourage the construction methods of floor covering which have a high skid resistance performance. As a result of VA, the particle method which the skid resistance performance is improved up to four times more than other alternatives shows the highest performance index of 83.86.

• Korean journal of applied entomology
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• v.59 no.1
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• pp.55-64
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• 2020

Smart greenhouses are primarily used for growing fruits and vegetables, such as sweet peppers, tomatoes, strawberries. Although the number of smart greenhouses has been increasing exponentially, no studies have been performed to evaluate the state of smart greenhouses in Korea. Therefore, this study was conducted to determine current state of smart greenhouses with regard to greenhouse specifications, crop growing methods, pests, and user satisfaction in Korea. Contact information for smart greenhouses was provided by the officials of local agricultural research and extension services. This survey was conducted by visiting each greenhouse. Results showed that approximately 50% of surveyed smart greenhouses were between 3,300 ㎡ and 6,600 ㎡. The most frequently chosen method for pest control was chemical pesticides (97.1%). Powdery mildew and gray mold comprised 54.4% and 33.8% of the crop diseases, respectively. All tomato greenhouse farmers considered whiteflies the most problematic pest. In contrast, 76.5% and 70.6% of sweet pepper farmers believed thrips and aphids posed significant threats, respectively. The mean satisfaction score was 7.5 out of 10 points, with 10 being "extremely satisfied". These results will aid in decision making with respect to the management of current smart greenhouses and the design of future smart farms in Korea.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1996.04a
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• pp.445-449
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• 1996

한 국가의 과학기술 수준은 그 국가의 현재와 미래를 짐작케 하는 가장 중요한 척도라고 해도 과언은 아니다. 이에 따라 각국은 기술발전을 기하기 위하여 다양한 과학기술 정책을 펴고 있으며, 이러한 정책의 성패 여부는 국가의 과학기술 수준 뿐 아니라 국가의 미래에 지대한 영향을 미치게 된다. 그러나 세계무역기구(WTO)의 출범에 따라 기존의 과학기술 정책에 대폭적인 수정이 불가피하게 되었다. WTO는 공정한 무역질서의 회복을 위한 제반 규율을 대폭 강화하고 있으며, 여기에는 과학기술 정책과 관련한 부분들도 많이 포함되어 있다. 이로 인해 기존의 과학기술 정책에 대폭적인 방향수정이 요구되었고, 각 관련기관에서는 이에 대한 다양한 대응책들을 제시하고 있으나, 이러한 대응책들은 주로 민간 분야와 관련한 것이어서 미흡한 감이 있다. 이는 민간 분야에 파급효과가 지대한 것으로 알려지고 있는 국방과학기술에 대한 정책이 고려되지 않았기 때문이다. 사실 선진국에서는 국방과학기술분야에의 투자를 통해 많은 효과를 얻고 있다. 또한 국방 분야에 대한 문제는 WTO 체제에서 예외로 인정하고 있어, 새로운 환경에 대한 좋은 대응책이 될 수 있다. 그러므로 국방과학기술 정책에 대한 고려가 없는 과학기술 정책은 완전한 정책이라고 할 수 없다. 본 연구에서는 WTO의 출범에 대한 대응방안으로서 국방과학기술 정책의 효율적인 집행을 제안하였다. 이를 위해 우선 WTO의 성격과 WTO 출범으로 야기되는 과학기술 정책및 특히 국방과학기술 정책의 운용시의 변화요인들을 조사하였다. 또한, 국방과학기술 정책의 파급효과를 조사하였으며, 일곱 가지 사용가능한 국방과학기술 정책 대안들을 식별하였다. 또한 식별된 정책 대안들간의 비교를 통하여 효율적인 국방과학기술 정책 방안을 제시하였다.. 문제점들은 HED (Human Engineerign Discrepance) 목록으로 정리하여 설계에 반영하도록 하였다.로 마음의 안정감, 몸의 긴장 이완에 따른 건강 상태 유지, 수업 집중도 향상 등이 나타났다. 위와 같은 종합 적 분석 결과에 따라, 본 연구는 제조 현장의 생산성 향상 및 품질 향상과 연계하여 작업자의 작업 집중도 향상, 작업자의 육체적, 심리적 변화에 따른 생산성 및 품질 향상 변화 정도 등의 산업공학(인간공학) 제 분야의 여러 측면에서 연구 및 적용이 가능하리라 사료된다.l, 시험군:25.90$\pm$7.16mg/d1, 47% 감소)를 나타내었으며, 시험군의 AUC는 대조군에 비해 39% 감소하였고, 혈중 아세트알데히드의 농도는 투여 60분후 시험군(3.96$\pm$0.07nmo1/$m\ell$)이 대조군(6.45$\pm$0,64nmo1/$m\ell$)에 비해 유의성 있는 감소(39%)를 나타내었으며, 시험군의 AUC는 대조군에 비해 48% 감소하였다 한편, 시험관내 에탄올 대사 효소에 대한 바이오짐의 효과를 검색해본 결과 바이오짐(2.0 $\mu\textrm{g}$/assay)에 의해 Aldehyde dehydrogenase(1.5unit/assay)의 활성이 14% 증가되었다. 본 연구의 결과로 볼 때, 비지니스 및 바이오짐은 음주 후 상승된 혈중 에탄을 농도 및 아세트알데히드의 농도를 현저히 감소시키는 효과가 있었다.량 보호 관리, 도시 소공원 개발, 역사 문화 공원 조성, 하천 공간 복원, 공원 시설 기능 개선, 이용 프로그램 개발, 공원 관리 개선, 환경 피해 녹지의 회복, 도시 환경 림 조성, 녹지

• Proceedings of the Korean Society of Community Living Science Conference
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• 2009.09a
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• pp.97-97
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• 2009

본 연구에서는 초 중등 교원들의 농업 농촌에 대한 가치 인식 및 학교 현장에서의 학생 지도력을 높이기 위해 교원들에게 농촌어메니티에 대한 이론과 체험 학습을 제공하는 '농촌어메니티 체험 연수 프로그램'의 개발 적용하고, 프로그램의 효과를 분석하였다. '농촌어메니티 개념 및 정책 이해', '농촌어메니티 현장 이해 및 체험', '농촌어메니티 수업 적용'의 3개 영역으로 구성된 총 20시간의 교원연수 프로그램을 개발하였으며, '09. 7. 23. ~ 8. 13.까지 2박 3일씩 5차에 걸쳐 200명의 교사를 대상으로 연수 프로그램을 운영하고, 연수 전후 설문조사를 실시하여 그 결과를 분석하였다. 연수에 참여한 교원들의 인구통계학적 특성을 분석한 결과, 여성의 비율이 56.9%로 남성(43.1%)에 비해 높았으며, 일반교사의 비율(53.3%)이 부장교사(26.9%)나 교장 교감 (19.8%)의 비율에 비해 높았다. 연령 분포에서는 50대가 35.2%로 가장 많고, 40대가 32.7%를 차지하고 있었으며, 경력이 20년 이상인 교원들이 67.2%인 것으로 나타났다. 근무기관 분포에서는 초등학교 교원들이 54.8%로 가장 많았으며, 중학교, 고등학교 교원이 각각 20.3%, 18.8%인 것으로 나타났다. 근무지역 분포에서는 중소도시에서 근무하는 교원들이 70.6%로 대다수를 차지하고 있었으며, 농촌거주 경험이 있는 교원들이 64.8%인 것으로 분석되었다. 연수 참여 사전-사후 설문조사를 통한 인식 변화를 분석(Paired samples t-test)한 결과 참여 이후 '농업 농촌에 대한 관심 정도', '농업의 중요도에 대한 인식', '농촌의 생활 정주, 관광 휴양 여건에 대한 인식', '농촌어메니티에 대한 이해도'가 모두 개선된 것으로 나타났다. '농촌어메니티에 대한 중요도 인식'(5점 척도)에서는 환경자원, 자연자원, 역사자원, 경관자원, 시설자원, 경제활동자원, 공동체활동자원으로 분류된 37개의 세부자원들에 대한 중요도 인식이 연수 참여 이후 높아진 것으로 나타났다. 단, 환경자원 가운데 '수질'의 평균 점수는 사전 4.8671, 사후 4.8960로 유의미한 차이가 발견되지 않았다. 연수 전반에 대해 만족하는 교원의 비율이 98.5%로 나타났으며, 연수 이후 농업 농촌에 대한 이해도가 증가했다는 응답이 98.0%, 학생 지도력이 증가했다는 응답이 95.0%, 연수에서 학습한 내용을 학생지도시 활용하겠다는 응답이 97.5%로 집계되어, 개발된 연수 프로그램이 설계시 수립한 목적 달성에 기여하고 있는 것으로 분석되었다.

• Therapeutic Science for Rehabilitation
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• v.4 no.2
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• pp.73-83
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• 2015

Objective: The purpose of this study was to examine the effect of the Spaced Retrieval Training (SRT) with Errorless learning on the elderly with Mild Cognitive Impairment (MCI)'s memory, Instrumental Activities Daily Living, Depression symptom. Methods: A single subject experimental research with ABA design was conducted in this study on the 78-years-old person who was enrolled in day-care center. The total experimental sessions were 16 which composed of 3 sessions for baseline, 10 sessions for intervention and 3 sessions for second baseline. K-Auditory Verbal Learning Test (K-AVLT) was measured for the memory each session. For the measurement of cognitive function, IADL, depression Symptom, Korean version of Montreal Cognitive Assessment (MoCA-K), Philadelphia Geriatric Center Instrumental Activities Daily Living (PGC IADL), Geriatric Depression Scale Korean Version (GDS-K) was measured at pre-post test. Results: Memory at the phase B was improved than Phase A. At the phase B, the scores trend was ascending, but after the intervention at the phase A', the scores trend was descending. The scores of MoCA-K were improved, PGC IADL were maintained, GDS-K were decreased. Conclusion: This results support the evidence of the SRT with EL on the elderly with MCI in the clinical setting. In the future, the correlation researches about MCI's memory and other functional factors will be needed for effective occupational therapy service.

• Therapeutic Science for Rehabilitation
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• v.9 no.3
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• pp.35-51
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• 2020

Objective : The purpose of this study was to develop and establish the preliminary validity of the Restaurant Accessibility and Task Evaluation Information Tool (RATE-IT), an electronic survey for evaluating restaurant accessibility for people with disabilities. Methods : A multi-phase method was used to develop and validate the RATE-IT. The taxonomy was developed in phase one, while the validity of the content was tested in phase two. Finally, the validity of the constructs was assessed in phase three. Results : The results indicated that appropriate items were included (relevance=0.99 and language level=0.99) and also supported that the RATE-IT evaluated the construct of restaurant accessibility (F=0.72, p=.40). When compared to a checklist of the Americans with Disabilities Act Accessibility Guidelines (ADAAG) for Buildings and Facilities questions, RATE-IT showed the potential to differentiate restaurants by their level of accessibility (p=.10). Further, the RATE-IT was also easy to use (p<.00), understandable (p<.00), and efficient (p<.00). Conclusion : RATE-IT shows a promising methodology and is strongly preferred by users.

• Journal of Animal Environmental Science
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• v.9 no.2
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• pp.69-78
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• 2003

In this study, the energy conversion equipment from the radiation energy to mechanical energy by using n­pentane as the operating fluid was constructed and the performance to pump the water was tested for the utilization of solar powered water pump. The equipment was designed optimally, after the theoretical analyses of the water pumping head and water quantity per cycle were done. The pentane vapour temperature in the condenser and the temperature of the outlet water from the condenser became lowered and the heat transfer rate became higher with decreasing the water inlet level to the condenser. The temperature difference between the condenser and the water tank was significant. Therefore, the distance between the water tank and condenser was recommended to be shorten and the diameter of their connecting pipe was recommended to be narrow in order to reduce the resistance of the fluid passage and improve the heat transfer rate. The amount of water pumped was 1.6­2.4 liters. Mass flow rate of the cooling water became lowered when the cooling water pipe was prolonged from the condenser to improve the heat transfer rate.