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김현오,염숙경,한승범,권효진,강진한,Kim, Hyun O,Yum, Sook Kyung,Han, Seung Beom,Kwon, Hyo Jin,Kang, Jin Han The Korean Society of Pediatric Infectious Disease 2012 Pediatric Infection and Vaccine Vol.19 No.3
Streptococcus anginosus는 Streptococcus milleri group에 속하는 viridians streptococci의 한 종으로, 사람의 구강, 상부 호흡기, 위장관 및 여성 생식기에 정상 세균총으로 존재하며, 숙주의 면역 상태에 따라 질환을 일으킬 수 있다. 저자들은 치과 치료 후 발열, 황달, 우상복부 불편감을 주소로 내원한 건강하였던 15세 남아에서 S. anginosus에 의한 균혈증이 동반된 급성 무결석 쓸개염을 진단하였고, 환아는 항균제 치료 후 호전되었다. 소아 청소년 시기에 흔하지 않은 급성 무결석 쓸개염이 기저 질환 없는 청소년에서 viridians streptococci에 의해 발생한 드문 경우이다. Streptococcus anginosus is a member of Streptococcus milleri group, and is found in the oral mucosa, respiratory tract, and gastrointestinal tract as normal flora. It can develop into a disease in patients with deteriorating clinical condition or with clinical risk factors. A previously healthy 15-year-old boy was admitted due to fever, abdominal discomfort and vomiting which lasted for 7 days. He had a history of dental procedure 1 day before the development of fever. He was diagnosed with acute acalculous cholecystitis based on the clinical, laboratory, and imaging finding, and S. anginosus was isolated from the blood culture. The patient was successfully treated with antibiotic therapy.
레진 시멘트와 상아질접착제를 사용한 콤포지트 레진 코아의 전단결합강도에 관한 연구
김현오,방몽숙,Kim Hyun-O,Vang Mong-Sook 대한치과보철학회 2004 대한치과보철학회지 Vol.42 No.1
Purpose : The purpose of this study was aimed to compare the shear bond strength on dentin of three dentin bonding agents and two resin cements used in conjunction with self-cured composite resin core material. Material and method : Control group and six experimental groups were divided for this study. Control group was designated as specimens bonded with Tenure$ A&B^{(R)}$. Experimental groups were as follows : PB-BL group : specimens bonded with Prime&Bond $NT^{(R)}$, $BondLink^{(R)}$ SB-BL group : specimens bonded with $^{(R)}$, BondLink$SingleBond^{(R)}$ PB group : specimens bonded with Prime&Bond $NT^{(R)}$ SB group : specimens bonded with $SingleBond^{(R)}$ PF group : specimens bonded with $Panavia-F^{(R)}$ BI group specimens bonded with Bistite $II^{(R)}$ All specimens were stored in $37^{\circ}C$ distilled water for 24 hours, followed by the shear bond strength was tested by universal testing machine. The data was analysed statistically by Mann-Whitney test. Results : 1. For Prime&Bond $NT^{(R)}$ and $SingleBonde^{(R)}$, the shear bond strength was 0.24 MPa and 7.19 MPa each by each, while Tenure $A&B^{(R)}$ group control was measured at 13.93 MPa (p<0.05). Especially for Prime&Bond $NT^{(R)}$ it did not get conjunction with dentin. 2. For Prime&Bond $NT^{(R)}$ and $SingleBond^{(R)}$ using $BondLink^{(R)}$, there was no significant difference as a result of 11.73 MPa and 14.00 MPa each by each (p<0.05). 3. For $Panavia-F^{(R)}$ and Bistite $II^{(R)}$, they showed the highest shear bond strength as measured by 18.24 MPa and 16.09 MPa each (p<0.05).
김현오(Hyun Ho Kim),김규완(Kyu Wan Kim),조성현(Sung Hyun Cho),김대성(Day Sung Kim),김증호(Jeung Ho Kim),강성규(Seong Kyu Kang) 대한인간공학회 2008 大韓人間工學會誌 Vol.27 No.1
The purpose of this survey was to identify ergonomic risk factors of work-related musculoskeletal disorders (MSD) and understand the current MSD risk status in the wholesale/retail industry. The field survey was conducted at 120 wholesale/retail establishments, and the cause of MSD occurred from the national industrial accident statistics by the Ministry of Labor in 2006 was analyzed in terms of company size, a term of work, job title, and cause of occurrence. The numbers of disasters on MSD were 602 which were included 432 disasters who met with low back pain by incident. A checklist was developed by KOSHA to use for the field survey. A total of 419 tasks were identified at the 120 establishments surveyed. The highest frequency was Task 2(45%) which was mostly observed in repetitive work (e.g. displaying, scanning, cutting or wrapping of goods). The second and third were Task 9(34%) and Task 8(14%) which were identified in manual materials handling (e.g. lifting, lowering, carrying or stocking of goods). The results suggest that the three Tasks should be first considered for the control in wholesale/retail industry and that exposure to MSD risk factors in those Tasks should be primarily addressed in order to reduce MSD risk in that industry.
얼굴인식 향상을 위한 스테레오 영상에서의 특징점 추출 방법 비교
김현오(Hyunnoh Kim),이세진(Sejin Lee),박장한(Changhan Park),남궁재찬(Jaechan Namkung) 한국멀티미디어학회 2006 한국멀티미디어학회 학술발표논문집 Vol.2006 No.2
본 논문에서는 스테레오 영상을 이용한 3D 얼굴인식의 효율성을 높이기 위해 특징점 추출 방법인 SIFT(Scale Invariant Feature Transform)를 적용하였다. 기존의 블록정합 방법인 MAD(Mean Absolute Difference)와 MSE(Mean Square Error)는 특징점의 선정에 따라 성능에 큰 차이를 보인다. 스테레오 얼굴영상에서 SIFT를 이용하여 특징점을 추출하고, MAD와 MSE를 이용하여 정합한 결과와 SIFT를 이용하여 정합한 결과를 비교했다. 실험을 통해서 스테레오 영상의 좌우 특징점을 벡터의 거리를 계산하여 그 효율성을 검증하였다.
Barley β-Glucan 처리에 의한 조골세포 분화의 분자적 기전
김현오(Hyeon-Oh Kim),임용주(Young-Ju Lim),장원구(Won-Gu Jang) 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.5
본 연구에서는 barley β-glucan(BBG)이 조골세포 분화에 미치는 영향을 조사하였다. 조골 전구세포주인 MC3T3-E1 cells와 mouse calvaria primary cells에서 BBG를 처리하여 실험을 진행하였다. MC3T3-E1 cells 및 mouse calvaria primary cells에서 BBG를 처리하여 RT-PCR 분석법을 통해 Dlx5, Runx2 유전자 발현을 증가시키는 것을 확인하였다. Western blot 분석법을 통해 Dlx5, Runx2와 p-p38, p-Smad1/5/9 단백질 발현이 증가하는 것도 확인하였다. 또한, Alizarin Red 염색으로 BBG 처리에 의해 칼슘 침착이 증가하는 것을 확인하였다. 그뿐만 아니라 BBG에 의해 증가한 Dlx5와 Runx2 유전자 및 단백질 발현과 p-p38, p-Smad 1/5/9의 단백질 발현이 p38 억제제(SB203580) 처리로 감소한 것을 확인하였다. 이를 통해 BBG가 p38 신호전달경로를 통해 조골세포 분화를 증가시키는 것을 확인하였다. Zebrafish에 BBG를 처리한 후 Alizarin Red 염색을 통해 절단된 꼬리지느러미의 재생이 증가한 것을 확인하였다. 본 연구를 종합해보면 BBG가 조골세포 분화를 증가시켜 골 질환 치료제로 사용될 수 있음을 시사한다. The fiber found in oats and barley is a polysaccharide β-glucan. Barley β-glucan (BBG) is reported to effectively attenuate the glycemic response and reduce post-prandial blood glucose levels. However, the function of BBG in osteogenic differentiation remains unclear. In this study we investigate that the effect of BBG on osteoblast differentiation in a pre-osteoblast cell line and mouse calvaria primary cells. RT-PCR and western blot analysis revealed that exposure to BBG increases the mRNA expressions and protein levels of distal-less homeobox 5 and runt-related transcription factor 2. Furthermore BBG also increases p38, Smad1/5/9 phosphorylation and mineralization. We confirmed the regenerative effect of BBG on caudal fin in zebrafish by applying Alizarin Red staining analysis. Taken together, these results indicate that BBG increases osteogenic differentiation via activation of p38 MAPK-mediated Smad1/5/9 in MC3T3-E1 cells and mouse calvaria primary cells.
자갈도상 급곡선(R=60m)부 정척레일 이음매부 유지관리 연구
김현오(Hyunoh Kim),양회성(Yang Hoe Sung),백찬호(Chanho Paik),박용걸(Chanho Paik),강윤석(Seok Ho Kim) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
도시철도 건설 시 측선의 최소곡선반경 기준은 별도 규정이 없고 지자체장의 승인으로 설치되고 있다. 국내 도시철도 운영기관 중 최급곡선(R=60m)이 부설되어 운영중에 있고, 운용 중 이음매부의 계속적인 줄틀림 발생으로 유지관리에 어려움이 발생되어, 이를 해소하기 위한 방안으로 정척레일(20m) 이음매부 침목에 버팀재를 설치하여 레일 궤도선형을 유지하고자 한 연구 사례를 제시하고자 한다. When constructing the urban railway, there is no provision about the minimum radius of curve which is admitted by the chief of local government. Sharp curved(R=60m) track has been installed in domestic and operated by a urban railway corporation. It has raised a track alignment irregularity which made it hard to operate and maintain. This study aims to show example of experience which is for enforcing the intension of a lateral track force using a strut in rail joint.
김현오(Kim, Hyeon-O),강민우(Kang, Min-Woo),김용승(Kim, Yong-Seung) 대한건축학회 2018 대한건축학회 학술발표대회 논문집 Vol.38 No.2
The paradigm of public libraries in Korea has been changed to "the Living room of the City", for an inclusive space for all people in local communities. This study aims to identify the recent trends of public libraries in Korea, as analysing the policy report of public libraries and space layout of 40 cases. The findings suggests the lobby of public libraries has became more complex and integrated spaces with a variety of programs, compared to the traditional transition space without library program.