계룡산국립공원의 나비류 군집에 관한 연구

전성재 ( Sung Jae Jeon ),조영호 ( Young Ho Cho ),한용구 ( Yong Gu Han ),김영진 ( Young Jin Kim ),최민주 ( Min Joo Choi ),박영준 ( Young Jun Park ),남상호 ( Sang Ho Nam ) 한국환경생태학회 2012 한국환경생태학회지 Vol.26 No.3

고도의 변화는 종 다양성 및 풍부도 그리고 생물 종 구성에 있어 매우 중요한 역할을 하는 요인으로 최근에는 나비를 비롯하여 곤충의 고도에 따른 분포 형태에 관하여 많은 관심이 집중되고 있다. 본 논문에서는 계룡산국립공원의 고도에 따른 나비분포를 조사하여, 종 보전 및 효율적인 관리방안을 제시하고자 하였다. 본 연구에서는 고도가 증가함에 따라 종과 개체수가 감소하는 경향이 나타났으며, 이는 수관울폐로 인한 그늘의 증가가 원인일 것으로 사료된다. 고도의 영향 이외에도 종의 분포에 영향을 주는 요인을 분석한 결과, 경사도 및 식생군락 그리고 수계거리가 종의 분포 변화와 상관관계가 있는 것으로 조사되었다. 이러한 종들은 먹이식물과 밀접한 관련이 있으므로 추후에 숲 내부의 변화를 감지하는데 적합한 생물지표종을 선정한다면 시간과 비용을 감소시킬 수 있을 뿐만 아니라 효율적인 생물다양성 평가를 내릴 수 있을 것으로 판단된다. 또한 추후에 기후 및 미기후, 그리고 먹이식물과 같은 환경요인들의 자료를 축적하고 정량화 할 경우 나비 분포를 예측할 수 있어 종 보전에 있어 더 효율적이라고 사료된다. Altitude is a factor that plays an important role in the diversity, richness and composition of species. Recently, much attention has been paid to the distribution of butterflies and insects according to altitude. The purpose of this article is to propose a method to preserve and manage species efficiently by reviewing the distribution of butterflies according to different altitudes in Mt. Gyeryong National Park. This study found that the number of species and individuals decreased as the altitude increased, possibly due to the increased amount of shade caused by the crown density. When analyzing the factors influencing the distribution of species other than altitude, it was found that the slope, vegetative colonies and hydrosphere distance were correlated with the change in species distribution. As these species are closely related to food plants, it may save time and reduce the cost as well as allow an efficient evaluation of the bio-diversity if these species are selected as biological indicator species suitable for detecting the changes in the forest. It is judged to be a more efficient means of species preservation to accumulate and quantify the materials regarding environmental elements such as the climate, microclimate and food plants, as this would allow the butterfly distribution to be estimated.

선회용 유성 기어박스의 유성기어 베어링 설계

박영준(Young-Jun Park),이근호(Geun-Ho Lee),송진섭(Jin-Seop Song),남용윤(Yong-Yun Nam),박성하(Sung-Ha Park) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.2

In order to meet the service life of planetary gearbox, a planet bearing, well known as the component with the highest failure rate, is designed. To predict the bearing fatigue life, ISO standard(ISO/TS 16281) is used, and the design parameters of the bearing are optimized using a parametric method. The whole planetary gearbox model is developed using a commercial software to calculate loads acting on planet bearings accurately. The results state that the designed bearings are satisfied with the life of 15,000hours, and the bearings that consist of 22rollers of 58mm have 1.6times longer life and better load sharing relatively than 22rollers of 28.5mm. Also, the increase in preload of taper roller bearings on the output pinion shaft prolongs the life of planet bearings regardless of rollers length.

풍력발전기용 증속기 상태 모니터링에 관한 기초 연구

박영준(Park, Young-Jun),이재정(Lee, Jae-Jeong),이근호(Lee, Geun-Ho),남용윤(Nam, Yong-Yun) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10

To improve the reliability and extend the life for a wind-turbine gearbox, the gearbox needs to be monitored and analysed exactly. This study was conducted to analyze and detect the gearbox conditions when lubricating oil contaminated by wear particles was used. Characteristics of the gearbox failure by wear particles were monitored simultaneously by the on-line measurement sensor of vibration, oil condition and temperature. For the detail vibration analyses, frequency analysis(FFT) was performed. The results of the study were summarized as follows: Vibrational signal was found sensitive to abnormal changes of the gearbox conditions when lubricant was contaminated by wear particles. Also, using frequency analysis for the harmonics of gear mesh frequency(GMF), it is found that the failure of gearbox was caused by the damages of meshing gears. However, temperature and oil condition measuring signals were found not so effective to detect any gearbox failure by oil contamination.

티타늄 표면상에 코팅된 강유전성 BaTiO₃ 박막의 생체적합성과 골아세포 활동도에 미치는 영향

박영준(Yeong-Joon Park),정영화(Yeong-Hwa Jeong),곽인주(In-Ju Kwak),이용렬(Yong-Ryeol Lee),송호준(Ho-Jun Song),노세라(Se-Ra Noh),황규석(Kyu-Seog Hwang),임용무(Yong-Mu Lim) 대한치과재료학회 2003 대한치과재료학회지 Vol.30 No.3

이온빔보조증착법으로 합성한 hexagonal BN막의 hexagonal ring의 배열과 결정성

박영준(Young-Joon Park),한준희(Jun-Hee Hahn),이정용(Jeong Yong Lee),백영준(Young-Joon Baik) 한국진공학회(ASCT) 1999 Applied Science and Convergence Technology Vol.8 No.1

이온빔보조증착법으로 h-BN을 증착하여 이온에너지 및 기판온도에 따른 hexagonal ring의 배열 및 결정성의 변화를 연구하였다. 보론은 전자빔으로 1.5 Å/sec의 속도로 증발시켰으며, 질소는 end-hall 형 이 온건으로 60, 80, 100eV의 에너지로 공급하였다. 기판의 온도는 상온 (no heating), 200, 400, 500, 800℃로 변화시켰다. 질소이온에너지가 증가할수록 hexagonal ring의 c-축은 기판에 평행하게 배열하여 100 eV의 질소이온 에너지에서 가장 좋은 배열을 나타내었다. 이는 이온에너지가 높을수록 합성 막에 큰 압축응력이 발생하기 때문으로 생각된다. 기판온도에 따라서는 온도가 증가함에 따라 배열이 증가하다가 약 400℃에서 최대가 되고 그 보다 높은 온도에서는 배열이 감소하였다. 그리고 결정도는 온도가 증가할수록 향상되었다. 이러한 경향들은 온도가 증가함에 따라 원자 이동도는 증가하고 응력발생은 어려워지는 경향으로부터 잘 설명된다. 또한 nano-indentor로 측정한 h-BN막의 경도는 c-축의 배열정도와 같은 경향을 보였다. 이온빔보조증착법은 hexagonal ring의 배열을 통한 h-BN막 성질의 최적화에 효과적인 방법으로 판단된다. We have studied the alignment and the lattice quality of hexagonal rings of h-BN films synthesized by ion beam assisted deposition (lBAD) method. Boron was e-beam evaporated at 1.5 Å/sec and nitrogen gas was ionized using end-hall type ion gun at 60, 80, and 100 eV, respectively. Substrate was either not heated or heated at 200, 400, 500, and 800℃, respectively. As nitrogen ion energy increases, c-axes of hexagonal rings tend to align parallel to the substrate, which is explained by larger compressive stress at higher ion energies. Alignment of c-axis increases with temperature and shows maximum around 400℃. The lattice quality of hexagonal rings improves with temperature. Such behaviors can be understood from two counter trends of increasing the atomic mobility and decreasing compressive stress with temperature. Hardness of h-BN films shows the same trend with the alignment of c-axis. Ion beam assisted deposition method seems to be effective for aligning hexagonal rings and optimizing h-BN properties.

풍력 발전기용 증속기의 유연 핀이 수명에 미치는 영향 연구

박영준(Young-Jun Park),이근호(Geun-Ho Lee),남용윤(Yong-Yun Nam),김정길(Jeong-Kil Kim) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.9

풍력발전기용 증속기의 유성기어열에서 한단 지지 캐리어에 유연 핀을 적용하여 유성 축과 유연핀의 변형에 의한 자기 정렬 효과가 증속기 유성기어열의 수명에 미치는 영향에 대한 연구를 수행하였다. 유성기어열의 하중 분배 효과를 분석하기 위하여 오일러 이론과 상용 프로그램을 이용하였다. 풍력발전기용 증속기에 한단 지지 캐리어와 유연 핀이 사용됨에 따라 유성기어의 미스얼라인먼트, 치면 하중분포 계수 및 요구수명이 만족할 만한 성능 향상을 가져왔으며, 특히 요구수명에 있어서 증속기가 요구하는 20 년 보증 수명을 만족하는 것으로 확인되었다. An overhung mounted carrier with flexible pins is applied to the planetary gear train of a wind turbine gearbox to investigate the influence of the self-aligning effect by means of the deflection of the planet spindle and the flexible pin on the lifetime of the planet gear for a wind turbine gearbox. To analyze the load distribution of planet gears, both Euler theory and commercial software are employed. By applying an overhung mounted carrier with flexible pins in the wind turbine gearbox, we can improve the misalignment performance, face load factor, and service life of the planet gears. In particular, it was confirmed that a service life of more than 20 years could be realized for wind turbine gearboxes by applying a flexible pin to the overhung mounted carrier.

저절로 호전된 다발공동성 결절 형태의 IgG4 연관 폐 질환의

박영준 ( Young Jun Park ),윤태욱 ( Tae Wook Yoon ),정근용 ( Geun Yong Jung ),정지환 ( Ji Hwan Chung ),최준영 ( Joon Young Choi ),김은주 ( Eun Joo Kim ),임효정 ( Hyo-jeong Lim ) 대한내과학회 2016 대한내과학회지 Vol.90 No.5

Immunoglobulin (Ig) G4-related disease was recently recognized as a systemic fibro-inflammatory disease characterized by dense lymphoplasmacytic infiltrates, storiform fibrosis, and obliterative phlebitis with IgG4-positive cells in the target tissues. This disease can localize to a single organ or be diffuse in multiple organs. Pulmonary manifestation in IgG4-related lung disease presents as various sized nodules, lung masses, patchy ground-glass opacities, consolidation, thickened bronchovascular bundles, nodular pleural lesions, and interstitial lung disease. Traditional treatment for IgG4-related lung disease includes systemic (cortico) steroids. Here, we report a case of IgG4-related lung disease presenting as multiple cavitary nodules that spontaneously regressed without systemic steroid use. (Korean J Med 2016;90:449-454)

시각장애 학교에서의 교류교육이 영재중학생의 장애인에 대한 다차원적 행동 변화에 미치는 영향

박영준 ( Young Jun Park ),권혁용 ( Hyeok Yong Kwon ),이해균 ( Hae Gyun Lee ) 대구대학교 한국특수교육문제연구소 2011 특수교육저널 : 이론과 실천 Vol.12 No.3

This study was conducted to identify the effects of the inclusive intervisiting program between students attending school for the blind and the gifted secondary school students on sighted gifted secondary students’ multidimensional attitudes toward people with disabilities and the factors affecting their behavioral changes, whose concrete purpose was to investigate the gifted students’ emotional, thinking and behavioral changes about people with disabilities. The participants included 25 students with visual impairments in school for the blind and 83 gifted secondary students with no visual impairment. Pre and post test were administered to gifted students with MAS questionnaires and the results were analyzed by Paired Samples t-test and Covariance Analysis. According to research results, the inclusive intervisiting program was found to have positive effects on the gifted secondary students’ emotion, thinking, behavior and overal multidimensional attitudes towards people with disabilities. As for gifted students’ background factors, their experiences for volunteering work and education for understanding people with disabilities were main factors affecting the gifted students’ changes in multidimensional attitudes towards people with disabilities.

백혈병 세포주 Jurkat의 세포고사 유도 및 세포주기 억제에 미치는 合歡皮 추출물의 효과

박영준(Young Jun Park),정우철(Woo Cheol Jung),정대영(Dae Young Jeong),이용운(Yong Un Lee),이인(In Lee),이기상(Key Sang Lee),전병훈(Byung Hun Jeon),성강경(Kang Keyng Sung),문병순(Byung Soon Moon) 한의병리학회 2003 동의생리병리학회지 Vol.17 No.6

금강 수계 서식지 유형분류 및 수서곤충 섭식기능군 분포특성

박영준 ( Young Jun Park ),김기동 ( Ki Dong Kim ),조영호 ( Young Ho Cho ),한용구 ( Yong Gu Han ),김영진 ( Yeong Jin Kim ),남상호 ( Sang Ho Nam ) 한국환경생태학회 2011 한국환경생태학회지 Vol.25 No.5

본 연구는 금강 수계의 환경요인을 이용한 서식지 유형분류와 그에 따른 수서곤충 섭식기능군의 분포특성을 규명하기 위한 것으로 2007년부터 2008년까지 금강 수계에서 총 38개 지점에 대하여 봄과 가을에 걸쳐 년 2회씩 총 4회 조사를 실시하였다. 38개 조사지점별로 15개의 환경요인들을 현장 측정한 후 서식지 유사도 분석을 실시한 결과, 거리 척도값 4를 전후하여 상류구간(HD)은 C1과 C3그룹, 중류구간(MS)은 C2와 C4 그리고 C5그룹, 하류구간(LR)은 C6과 C7그룹으로 서식지 유형이 분류되었다. 서식지 유형분류에 있어 영향을 끼치는 주요한 환경요인은, 물리적 환경요인의 경우 하폭과 고도, 화학적 환경요인의 경우 수온과 전기전도도 그리고 DO, 하상재료의 경우 모래와 실트 그리고 잔자갈의 함량으로 분석되었다. 조사시기 동안 출현한 수서곤충은 총 9목 46과 142종으로 조사되었고, 서식지 유형별 종수 및 개체수 현존량 증감과 높은 상관성을 보인 주요 환경요인은 유속과 모래의 함량으로 나타났다. 또한 섭식기능군과 환경요인 사이의 상관성 분석결과, (1) 걸러먹는 무리(FC)는 유속, 수폭, 실트 (2) 주어먹는 무리(GC)는 유속 (3) 잡아먹는 무리(P)는 고도, 유속, 큰돌, 전기전도도, 모래 (4) 뚫어먹는 무리(PP)는 수폭, 실트 (5) 긁어먹는 무리(SC)는 유속, 전기전도도 (6) 썰어먹는 무리(SH)는 고도, 큰돌, DO, pH, 전기전도도, 수온과 각각 상관성을 보이는 것으로 나타났다. 본 연구의 결과, 단계적 다중회귀분석(SMRA)에 의해 도출된 금강 수계의 환경요인 중 고도, 하폭, 유속, 전기전도도, 수온 그리고 모래 등 6개의 요인은 생물군집의 서식과 상관성(r≥0.600, P<0.01)이 있는 것으로 나타나 금강 수계 섭식기능군 분포에 영향을 미치는 주요한 요인으로 제시되었다. This study was performed to classify habitat types depending on environmental factors and to find out distribution characteristics of functional feeding groups of aquatic insects which were collected at that habitat types. Field survey was conducted twice in a year for every spring and fall from 2007 to 2008 for 38 sites in the Geum River. During the field survey 15 environmental factors were measured at each 38 sites and analyzed by similarity analysis method to classify habitat types. The result of similarity analysis showed that the 38 sites could be grouped into 7 classes like as C1 and C3 class belong to Head water(HD), C2 and C4 and C5 class belong to Middle stream(MS), C6 and C7 class belong to Large River(LR) based on euclidean distances 4. And also, we could extract the main environmental factors affecting the classification of habitat types such as Stream Width and Elevation of physical environmental factors, Water Temperature, Conductivity and DO of chemical environmental factors, percentages of Sand, Silt and Gravel of substrate factors. Total 142 species of aquatic insects in 46 families, 9 orders were collected during the field surveys and the occurrence number of species and individuals showed high correlation with the Velocity factor and the percentage of Sand factor of each habitat types. In addition, correlation analysis between functional feeding groups and environmental factors represented that (1) Filtering-collectors(FC) affected by Velocity, Stream Width and Silt, (2) Gathering- collector(GC) affected by Velocity, (3) Predator(P) affected by Elevation, Velocity, Boulder, Conductivity and Sand, (4) Plant-piecer(PP) affected by Water Width and Silt, (5) Scraper(SC) affected by Elevation and Conductivity, (6) Shredder(SH) affected by Elevation, Boulder, DO, pH, Conductivity and Water Temperature respectively. As a result of this study, Elevation, Stream Width, Velocity, Conductivity, Water Temperature and percentage of Sand factors which were deduced by stepwise multiple regression analysis had correlations(r≥ 0.600, p<0.01) with biota community inhabitation. Therefore these six environmental factors were regarded as major environmental factors that might affect highly the distribution of functional feeding groups in stream ecosystem of the Geum River.