알루미늄 샌드위치구조용 250℉ 에폭시 접착필름 열적 특성 평가

오경원,박현범,김학순,공창덕 한국항공우주학회 2005 한국항공우주학회 학술발표회 논문집 Vol.- No.-

우리나라 근해 해양환경에 따른 가스터빈엔진 부식에 대한 연구

오경원,임세한 항공우주시스템공학회 2017 항공우주시스템공학회지 Vol.11 No.2

The sea of the Korean peninsula has undergone various marine changes, including naval vessels, naval operational aircrafts, air force fighters, coastal airports and airfields. In particular, salt directly affected by the marine environment, equipment operating under a high temperature / high speed as the gas turbine is the high temperature corrosion (Hot Corrosion) caused by sulfur components and salinity of the fuel used. When the height of the demister (air intake) is less than 7 m, the salinity of the salt entering the sea increases and the corrosion increases rapidly. In addition, the weapon systems operating in the East Sea than in the West Sea showed a 17% increase in the corrosion rate due to the relatively high salinity scattered by saline, wind, and wave. In order to minimize the salinity inflow, it should be operated at more than 13 m from the sea to minimize rapid hot corrosion. 한반도의 근해는 다양한 해양변화가 있으며, 작전을 수행하는 해군함정, 함재기, 해상운용 비행기, 공군의 전투기, 해안에 위치한 공항 및 비행장 등이 영향을 받는다. 특히 해양환경의 직접적인 영향인 염분은 가스터빈엔진과 같이 고온/고속으로 운용되는 장비에 연료의 황성분과 화학적 변화로 고온부식(Hot Corrosion)이 발생시킨다. 한계값으로 정의 할 수 없지만 염분에 의한 부식은 디미스터(공기흡입구) 높이가 7m 이하일 경우 해상에서 유입되는 염분이 증가하여 부식이 급격하게 증가하였다. 또한 서해보다 동해에서 작전임무를 수행하는 무기체계는 염분도, 풍량, 파고에 의해 비산되는 염분이 상대적으로많아 부식율이 17% 증가함을 확인하였다. 해상에서 가스터빈엔진을 운용하는 해상무기체계는 염분유입을 최소화하기 위해 해상으로부터 13m이상에서 운용되어야 급격한 고온부식을 최소화 될 것으로 본다.

Korea National Health and Nutrition Examination Survey, 20th Anniversary: Accomplishments and future directions

오경원,Yoonjung Kim,Sanghui Kweon,김소연,윤성하,Suyeon Park,이연경,김영택,Park Ok,정은경 한국역학회 2021 Epidemiology and Health Vol.43 No.-

The Korea National Health and Nutrition Examination Survey (KNHANES) was initiated in 1998 to provide evidence for the development and evaluation of health policies and programs. The Korea Disease Control and Prevention Agency is responsible for the KNHANES and has conducted it as a series of surveys. Over the past 20 years, efforts to produce accurate, timely, and nationwide health statistics have been refined by establishing a continuous annual survey system with full-time field staff, incrementally expanding survey components, collaborating with relevant academic societies for quality control, and revising the survey methods. Additionally, the utility of the collected data was increased by linking the KNHANES data with related data from other government agencies or institutions and making the overall data publicly available on the official website of KNHANES (https://knhanes.kdca.go.kr). Additional long-term plans are being developed, including plans to continue producing nationwide health indicators and invigorating the utilization of the KNHANES data.

해군 무기체계 한국형 상태진단시스템 발전방향 연구

오경원 항공우주시스템공학회 2016 항공우주시스템공학회지 Vol.10 No.4

The primary aim for using a Korean Condition Based Maintenance (CBM) system is to maintain military operational readiness using Interactive Collection Analysis Systems (ICAS) installed on naval vessels. Other aims are to preemptively provision maintenance and supply functions, to guarantee economical management of logistical assets, and to implement data driven equipment life cycle management. In order to accomplish these aims, it is necessary to establish standard system conditions. However, because manufacturers do not provide the technology necessary for maintenance management, it is required to retain component performance maps for each piece of equipment, and to accumulate data about frequently occurring fault patterns. This study confirms the validity of component performance maps using micro gas turbines and provides accumulated data on machine break downs. This would allow real time equipment performance checks and present performance trends. Then analysis would provide solutions for maintaining the best machine operating conditions with detailed maintenance manuals for operators. This study is a basis for further research to investigate additional ways to develop CBM using data obtained from naval vessels used in actual military operations. 한국형 상태기준정비는 현재 한국해군 함정에 설치된 ICAS를 최대한 활용하여 전투준비태세를 완비하고, 선제적 정비/보급 지원과 군수자산의 경제적 운용, 데이터 기반 장비수명관리를 위한 것이다. 이러한 목적을 달성하기 위해서는 장비상태의 기준을 설정해야 하는데 이는 제작사에서 원천적인 기술을제공하고 있지 않아 각 장비별 성능 맵 확보가 필요하고 고장패턴 등의 자료 축적이 필요하다. 본 연구에서는 소형 가스터빈엔진을 활용하여 가스터빈 성능 맵을 확인하고 고장정보를 축적하여 실시간으로장비성능 확인과 성능 경향을 나타내게 하였고 이를 통해 운용자의 행동지침과 정비자의 검사 절차등을 명시하여 최적의 장비상태가 유지 될 수 있도록 솔루션을 개발하였다. 본 연구를 기반으로 실제 함정의 데이터를 이용한 상태진단기법 발전에 활용할 예정이다.

학술연구논문 포스터발표 : 3분과: 산림공학, 사방, 토목, 벌채 ; 전라북도 산림유역의 토사생산량 산정을 위한 RUSLE 모형 인자 추출

오경원,박종민 한국임학회 2013 한국임학회 학술발표논문집 Vol.2013 No.-

한국 소아청소년의 비만 유병률 추이: 1997년과 2005년 비교

오경원,장명진,이나연,문진수,이종국,유명환,김영택 대한소아청소년과학회 2008 Clinical and Experimental Pediatrics (CEP) Vol.51 No.9

Purpose:The objective of this study was to provide current estimates of the prevalence and examine trends of overweight and obesity in children and adolescents. Methods:Height and weight measurements from 183,159 (112,974 in 1997, 70,185 in 2005) children and adolescents aged 2 to 18 years were obtained via the 1997 and 2005 National Growth Survey. Obesity among children and adolescents was defined as being at or above the 95th percentile of the gender-specific body mass index (BMI) for age in the 2007 Korean National Growth Charts or a BMI of 25 or higher; overweight was defined as being at or above the 85th percentile to less than the 95th percentile BMI. Results:In 2005, 9.7% (11.3% for boys, 8.0% for girls) of South Korean children and adolescents were obese; 19.0% (19.7% for boys, 18.2% for girls) were overweight or obese. The overall prevalence of obesity increased from 5.8% in 1997 to 9.7% in 2005 (from 6.1% in 1997 to 11.3% in 2005 for boys and from 5.5% in 1997 to 8.0% in 2005 for girls); the increasing trend was most evident in boys, especially those aged 13-18 years. Conclusion:The prevalence of obesity among children and adolescents increased significantly during the eight-year period from 1997 to 2005. This study suggests that we need to make a priority of developing strategies to control obesity in children and adolescents; the potential health effects of increases in obesity are of considerable public health importance. (Korean J Pediatr 2008;51:950-955) Purpose:The objective of this study was to provide current estimates of the prevalence and examine trends of overweight and obesity in children and adolescents. Methods:Height and weight measurements from 183,159 (112,974 in 1997, 70,185 in 2005) children and adolescents aged 2 to 18 years were obtained via the 1997 and 2005 National Growth Survey. Obesity among children and adolescents was defined as being at or above the 95th percentile of the gender-specific body mass index (BMI) for age in the 2007 Korean National Growth Charts or a BMI of 25 or higher; overweight was defined as being at or above the 85th percentile to less than the 95th percentile BMI. Results:In 2005, 9.7% (11.3% for boys, 8.0% for girls) of South Korean children and adolescents were obese; 19.0% (19.7% for boys, 18.2% for girls) were overweight or obese. The overall prevalence of obesity increased from 5.8% in 1997 to 9.7% in 2005 (from 6.1% in 1997 to 11.3% in 2005 for boys and from 5.5% in 1997 to 8.0% in 2005 for girls); the increasing trend was most evident in boys, especially those aged 13-18 years. Conclusion:The prevalence of obesity among children and adolescents increased significantly during the eight-year period from 1997 to 2005. This study suggests that we need to make a priority of developing strategies to control obesity in children and adolescents; the potential health effects of increases in obesity are of considerable public health importance. (Korean J Pediatr 2008;51:950-955)

탄성기초위에 종동력을 받는 보의 중간 지지효과

오경원,류시웅,공창덕,서주노 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-

나의 행복론

오경원 예수살이공동체 2004 산위의 마을 Vol.11 No.-

Study on Thermal Properties of Epoxy-Adhesive Film for Aluminum Sandwich Composite Structure

오경원,박현범 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.1

Among many composite material structures, honeycomb sandwich composites have been used in various ways. The honeycomb sandwich is adhered by polymer resin adhesive and the stiffness of honeycomb sandwich structures is determined by adhesive characteristics. This study is intended to evaluate adhesive characteristics after surface treatment and lateral compressive characteristics before and after thermal treatment when using adhesive films between aluminum skin (5J32) and honeycomb of aluminum honeycomb panel.

알루미늄 5052합금 표면처리에 따른 샌드위치 구조의 접착 특성연구

오경원,최경훈,정종철,이상진,조세현 한국항공우주학회 2005 한국항공우주학회 학술발표회 논문집 Vol.- No.-