• 해양환경안전학회지
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• 제26권6호
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• pp.615-623
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• 2020

중대한 해양사고의 위험성을 사전에 인지하고 예방하기 위하여 준해양사고를 분석하는 것은 매우 중요하며, 이는 하인리히의 법칙을 이론적 배경으로 들 수 있다. 부산항 VTS의 관제구역에서는 2019.1.1. ~ 2019.12.31.까지 11건의 충돌사고가 발생하였으며, 같은 기간 24건의 VTS 관점 준해양사고가 보고되었다. 하인리히의 법칙에 따르면 보고된 24건 사례 이외에 더 많은 잠재적인 위험 상황이 있을 것으로 예상된다. 이에 본 연구에서는 선행 연구와 부산항VTS 관제사를 대상으로 한 설문조사 및 준해양사고 24건의 분석을 통해 VTS 관점 준해양사고 기준을 설정하였다. 이를 기준으로 잠재적인 위험 상황을 파악하기 위해서 3일간 교통조사를 실시하였다. 3일간 교통조사 실시 결과 216건의 잠재적 위험 상황을 확인했으며, 1년으로 환산하면 약 26,280건으로 분석된다. 설문조사를 통한 준해양사고 발생의 중요한 원인인 'VHF 통신 피드백 누락' 등의 조건이 반영되지 않았음을 감안하더라도 관제구역 내 많은 잠재적인 위험이 있는 것으로 보이며, 이를 통해 VTS 관점의 준해양사고 보고제도 강화에 대한 필요성을 검증하였다.

• 한국작물학회지
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• 제41권4호
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• pp.475-481
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• 1996

본 실험은 육묘기간동안 근권의 공간제한이 뿌리 및 지상부의 생장에 미t치는 영향을 평가하기 위해 가로 세로가 각각 5cm이고 깊이가 5, 15, 30cm인 포트를 이용하여 포트의 용적을 조절하였다. 뿌리의 발달과 지상부의 생장은 가식 후의 담배육묘기간 동안 근계의 형태발달 및 지하부와 지상부의 생장을 조사하여 포트 용적에 따른 근계의 발달 양상을 알아보고 우량묘 생산에 있어서 합리적인 포트 규격과 이식 적기를 수립하고자 실시하였다. 1. 근권의 공간 제한은 환경반응에 따른 뿌리생장을 억제하여 지상부의 주요 생육형질을 감소시켰다 포트 깊이에 따른 용적제한은 관부에서 새로운 뿌리형성을 유도하였다. 2. 뿌리수의 발달은 포트 깊이가 얕을수록 많았고, 상대증식률도 컸다. 전체 뿌리길이와 평균 간장률은 포트 깊이가 깊을수록 길었다. 3. 각 순위별 뿌리수는 포트깊이가 깊을수록 1차 순위와 2차 순위 뿌리수가 많았고 얕을수록 3차 순위의 뿌리수가 많았다. 뿌리의 구조는 가식 후 20일에는 깊은 포트에서 넓은 뿌리 구조를 보였고 가식 후 25일에는 얕은 포트에서 넓은 뿌리 구조를 보여 공간제한에 따른 뿌리 형태와 구조가 변화하였다.

• 대한공간정보학회지
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• 제14권1호
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• pp.65-74
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• 2006

인공위성기술의 비약적인 발전은 각종 공간정보의 취득과 이를 응용하는 다양한 분야에 광범위하게 이용되고 있다. 특히 GPS를 이용한 위치결정은 국가 기준계가 세계좌표계로 전환되는 시점을 맞이하여 더욱 활성화 될 전망이다. 현재 국토지리 정보원에서 발급하는 삼각점에 대한 성과는 신성과와 구성과로 구분하고 있고 2007년 부터는 전면 세계좌표계로 전환할 예정에 있다. 현재 제주지역의 삼각점은 최초, 복구 또는 재설한 삼각점 성과 차이로 인해 측량자 들이 그 성과를 이용함에 있어 많은 혼란을 초래하고 있다. 따라서 본 연구는 제주지역의 현행삼각점간 부합관계를 점검하기 위해 1, 2등 삼각점을 기준으로 최초 측량 당시의 재 구성하여 GPS 관측을 수행하였다. 관측 후 성과분석을 통해 삼각점간 부합되는 안정점을 추출하고 제주지역에 적합한 측지기준망을 구축하고 그 활용 가능성를 제시하였다.

• 항공우주기술
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• 제1권2호
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• pp.105-112
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• 2002

본 논문에서는 KSR-III 김발엔진 구동장치 서보필터 설계 방안에 대한 연구 결과를 정리하였다. 비선형 해석모델에 대한 선형 근사모델을 기준으로 서보필터 설계를 수행하였다. 서보필터의 기본 형상으로서 설계 및 제작의 편의성 관점에서 2차의 Butterworth 저주파 필터를 우선적으로 고려하였다. 저주파 필터만을 사용할 경우 발생하는 불안정성 문제를 해결하기 위해 1차의 보상기를 추가하였다. 전체 로켓 시스템의 위상 안정성 여유와 공진 이득 감쇠를 동시에 고려할 경우, 2차의 Butterworth 필터로는 설계에 한계가 있었으며, 노치 필터를 사용해야 함을 알 수 있었다. 결과적으로, KSR-III 김발엔진 구동장치용 서보필터로는 2차 저주파 노치필터를 궤환신호와 명령신호 간의 오차 신호에 위치시키는 것이 효과적이라는 결론을 얻었다. 여기서 제시한 서보필터 형상을 토대로 추후 KSR-III 비행용 서보필터 제작 및 시험이 이루어질 예정이다.

• 여성건강간호학회지
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• 제2권2호
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• pp.182-201
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• 1996

The purpose of this study is to examine a married nurse's experience of child rearing through being applied to phenomenological research method. By exchanging their experiences, helping and understanding one another, married nurses can work with delight considering their own present job as their lifelong job. In addition this study can help single nurses overcome the female crises such as marriage, childbirth, and child rearing they will experience in the future. The subjects of this research was 26 married nurses who work for a university hospital in affiliation in Seoul and have children. The period of materials collection was from Feb. 1st to Mar. 3, 1995. The method of materials collection was primarily to write down a questionary with openhearted contents. In collecting it, the respondents were allowed to say at their pleasure through further interview. The materials were analyzed by Giorgi's phenomenological analysis method. The findings of this study are as follows ; 1) The responses of married nurses' experience of child rearing-[pleasure] [family solidarity] [maternal-infant attachment] [understanding] [toilsome]-were induced. That is, at once affirmative experience and hard experience coexisted. 2) The method of married nurses' child rearing-[rearing politely] [raising understanding] [having the sense of family community] [rearing with praying the heart] [careless]-were induced. 3) The support system of married nurses' child rearing-[having help family] [having help from others]-were induced. According to the above findings, the married nursed showed affirmative responses about their experience of child rearing, but at the same time they expressed painful when stayed apart from their children on account of their job or when their children were sick. In the method of child rearing, they tried to grow their children polite because there was much time for them to stay apart from their children. And they tried to give a better explanation in order that their children can have an independence spirit. They tended to compensate through frequent physical touch with their children. As the support system of married nurses' child rearing, they asked their parents or their parents-in-law to take care of their children, hired a nursery governess in their houses, or used a children's home, if they can't afford to. That is, the only one who has a firm sense of her profession, tries to inspire her accomplishment, and is receiving her husband' love and understanding is considered to perform two things simultaneously with harmony, having an recognition of lifelong job. Suggestions 1. The method to solve mental troubles on child rearing should be groped. 2. Their economical burden should be reduced by establishing children's home in their working places, and the increase of maternal-infant interaction should be contrived. 3. The chance of education should be offered in order that married nurses themselves might inspire self-conceit and professionalism on clinical nursing. 4. The familiar mood should be created through planning the programs to be accompanied with children as an annual event in hospital. 5. The part-time nurse system should be suggested to utilize. 6. The system of circulation working should be converted into the system of fixing working according to the characteristic of each department. 7. Programs for special activities such as learning foreign languages and computer should be supported positively.

• 한국환경복원기술학회지
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• 제12권4호
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• pp.11-22
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• 2009

This was a 2nd-year study aiming at developing the procedure of alternative system that was intended to restore not only biophysically disturbed areas but also psychologically and socially damaged community. It was suggested that this participatory restoration system could be constructed based on integrative categorization processes consisting of damage types and readiness of local residents for participation. Three case study sites-High-One resort, Lafarge-Halla cement, and high-altitude farmland near Gangneung city, were selected to apply the theoretical framework proposed as a result of 1st-year work. In order to develop introductory programs, key concepts such as forest for future, carbon offset forest, and healing forest, have been suggested based on analysis of 6 system components including human resources, communication, legal and institutional support, financial sources, restoration methods, and activity programs for each site. More detailed processes and procedures can be identified, defined, and refined after the end of final, 3rd-stage of the study in April of 2010.

• 대한치과의사협회지
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• 제53권9호
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• pp.644-655
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• 2015

Purpose: This study was conducted to evaluate the effect of the fixture abutment connection type and diameter on the screw joint stability in external butt joint for 2nd surgery and internal cone connected type implant system for 1st and 2nd surgery using ultimate fracture strength. Materials and Methods: USII system, SSII system and GSII system of Osstem Implant were used. Each system used the fixture with two different diameters and cement-retained abutments, and tungsten carbide / carbon coated abutment screws were used. Disc shaped stainless steel metal tube was attached using resin-based temporary cement. The experimental group was divided into seven subgroups, including the platform switching shaped specimen that uses a regular abutment in the fixture with a wide diameter in USII system. A static load was increased to the metal tube at 5mm deviated point from the implant central axis until it reached the compression bending strength at a rate of 1mm/min. Then the deformations and patterns of fracture in threaded connection were compared. Results and Conclusion: 1. In the comparison between the Regular diameter, compression bending strength of SSII system was higher than USII system and GSII system. There was no significant difference between USII system and GSII system. 2. In the comparison between wide diameter, compression bending strength was increased in the order of GSII system, USII system, and SSII system. 3. In comparison between the implant diameter, compression bending strength of the wide diameter was greater than the regular diameter in any system(P<0.05). 4. There was no significant difference between the platform switching (III group) and the regular diameter (I group) in USII system. 5. In USII system, fracture of abutment screw and deformation of both fixture and abutment were observed in I, II and III subgroups. 6. Failure pattern of SSII system, which was the fracture of abutment screw and deformation of the abutment and fixture, was observed in both IV and V subgroups. Fracture of some fixtures was observed in subgroup V. 7. Failure pattern of GSII system, which was the fracture of the abutment screw and deformation of the fixture and the abutment, was observed in both VI and VII subgroups. Apart from other subgroups, subgroup VII demonstrated no bending neither the fracture at the top of the fixture. The compressive deformation of internal slope in the fixture was the only thing observed in subgroup VII.

• Ocean and Polar Research
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• 제31권1호
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• pp.97-110
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• 2009

Two of the most important topics of the 21st century are ensuring harmony between man and his environment and the emerging long-tail economy in which niche markets are becoming increasingly more important. Since the Industrial Revolution in 17th century, human beings have increasingly exploited the world's natural capital, such as the natural environment and its ecosystems. Now the world is facing limits to sustainable economic growth because of limits to this natural capital. Thus, most countries are beginning to adopt a new development paradigm, the so-called"Green Development Paradigm" which pursues environmental conservation in parallel with economic growth. Recently, the Korean government announced an ambitious national policy of Low Carbon & Green Growth for the next six decades. This is an important step that transforms the existing national policy into a new future-oriented one. The fisheries sector in particular has great potential for making a substantial contribution to this national policy initiative. For example, the ocean itself with its sea plants and phytoplankton has an enormous capacity for fixing carbon, and its vast areas of tidal flats have a tremendous potential for cleaning up pollutants from both the sea and the land. Furthermore, the fishing industry has great potential for the development of fuel-saving biodegradable technologies, and a long-tail economy based on digital technologies can do much to promote the production and consumption of green goods and services derived from the oceans and the fisheries. In order for this potential to be realized, the fisheries authority needs to develop a new green-growth strategy that is practical and widely supported by fishing communities and the markets, taking into account the need for greenhouse gas reduction, conservation of the ocean environment and ecosystems, an improved system for seafood safety, the establishment of strengthened MCS (monitoring control surveillance) system, and the development of coastal ecotourism. In addition, fisheries green policies need to be implemented through a well-organized system of government aids, regulations and compensation, and spontaneous (voluntary) orders in fishing communities should be promoted to encourage far more responsible fisheries.

• 한국전자통신학회논문지
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• 제5권3호
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• pp.262-268
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• 2010

본 논문은 카메라의 고정 초점방식 렌즈를 통해 얻은 영상의 왜곡을 보상하여 왜곡된 이미지 좌표에서 본래의 좌표를 갖는 원영상으로 복원하는 연구이다. 이미지 센서의 다양한 영상 기기 발달과 활용으로 다방면의 산업분야에 확대 이용되고 있으나, 카메라의 소형화와 경량화 필요로 인해 렌즈의 굴곡에 의한 수신 영상의 왜곡이 영향을 미치는 경향이 많다. 특히, 입체 영상 카메라 응용 기기인 경우 좌, 우측 렌즈의 서로 다른 왜곡으로 입체감 저하 및 좌우 이미지 왜곡 등이 수반된다. 좌, 우측 카메라 수신 영상의 각 부분별로 본래의 좌표로 환산하는 근사식을 세우고 이들을 종합하는 방식으로 접근했다. 적응 뉴로-퍼지 추론시스템을 구성하여 소속 함수를 통해 분할하고 1차 Sugeno fuzzy 모델식으로 추정하여 좌, 우측 본래의 영상에 근접한 결과를 얻었다. 이로서 저가이며 소형 렌즈를 활용한 영상으로도 정확한 입체 영상 센싱 기능과 판별을 기대할 수 있게 된다.

• 사상체질의학회지
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• 제21권2호
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• pp.137-143
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• 2009

1. Objective : This study aims to evaluate the medical tourism structures in countries with prosperous medical tourism industry such as Thailand, Malaysia, Singapore and India in order ro propose optimal strategies that can promote the medical tourism in Korea. 2. Methods : All pertinent literature concerning medical tourism directly and indirectly were assessed, and reviews of medical tourism strategies found in various countries were evaluated. 3. Results : Evaluation of related literature reveals that medical tourism is a recent burgeoning industry that has grown In market size considerably in the last five to ten years. Also, it shows that oriental medicine is a highly likely candidate amidst the various medical fields for attraction foreign patients. 4. Conclusion : The Korean government should support and install appropriate legal and administrative bodies in order to attract medical tourists; Korea-specific medical tourism programs (ie. traditional Korean medicine package tours) should be developed in order to attract medical tourists from the western world and the middle-east. In addition, low-price policy of medical tourism is not a proper strategies for the competition against advanced medical tourism destinations such as Thailand, Malaysia, Singapore and India. Differentiated medical tourism package such as oriental medical tourism program rather than provision of low-price policy seems to be more effective strategy for the medical tourism in Korea. Future studies on strategies for promoting medical tourism should focus on how foreigners recognize traditional Korean medicine, what diagnostic approach might be appealing to them and how the legal system concerning the medical procedures may be altered and modified.