위축된 치조골에서 치조골 수평 확장술을 이용한 임플란트 이식술에 관한 임상연구

박영주,남정훈,송준호,연병무,노경록,방은오,정재안,신진업,강응선,Park, Young-Ju,Nam, Jeong-Hun,Song, Jun-Ho,Yeon, Byung-Moo,Noh, Kyung-Lok,Pang, Eun-O,Chung, Jae-An,Shin, Jin-Eob,Kang, Eung-Seon 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.4

The aim of this study was to evaluate the clinical applicability of a ridge splitting technique for reconstruction of narrowed edentulous alveolar ridges for dental implantation. 41 patients with 47 edentulous areas were included in this study. After corticotomy of a rectangular buccal segment and about 3-4 weeks healing period, the alveolar ridge was splitted, implant was placed. The initial ridge width varied between 2.5 and 7.0mm, average was 3.99mm. 68 dental implants were placed, and the gap between the implants and the bone is filled with various bone graft material, or none. All splitted sites showed sufficient bone volume for insertion of the implants at the moment of implantation. Over 1 year of follow-up period, five implants(7.3%) had mobility in two patients, among them, 2 implants(2.9%) sustained infection and removed. And any other complications were not noted. Our conclussion is that ridge splitting of the narrow edentulous area is a reliable and safe procedure in horizontally deficient ridges.

매력만점 서비스들 '언제 다 써보나'

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.181 No.-

유선.무선을 막론하고 최근 경쟁적으로 내놓고 있는 서비스는 네트워크의 진화 및 관련 기술 개발에 따른 결과물이기도 하다. 특히 시장 선점을 통해 차세대 통신서비스 맹주로 거듭나려는 이들 사업자들의 분주한 움직임은 서비스 범위의 확대 및 유.무선, 통신.방송을 넘나드는 형태로 진행된다는 게 특징이다. 그야말로 '컨버전스 시대, 컨버전스 서비스로 승부한다'는 게 이들 통신사업자들의 모토인 셈.

중국 IPTV 동향

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.179 No.-

신규 회원사

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.178 No.-

에어브로드밴드(대표 케네스 강 Kenneth Kang, www.airbb.com)는 미국의 'IT젖줄'인 실리콘밸리에 본사를 둔 한국계 기업이다. 지난 2001년 10월, 시스코 IP 기술과 삼성전자의 CDMA 기술을 섭렵한 전문가 5,6명으로 캘리포니아 산타클라라에서 설립된 이 회사는 무선 분야 새로운 기린아로 떠올랐다. 특히 'CDMA와 IP의 접목'을 장점으로 해 '와이어리스에 모바일(이동성)을 부가하는' 새로운 통신 조류에 강점을 갖고 있다는 평이다.

DMB 해외진출 현황

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.178 No.-

지난 12월 1일, 지상파DMB 서비스가 개시됨으로써 우리나라는 위성DMB를 포함, DMB를 '세계 최초'로 서비스하는 국가가 됐다. 이미 오래 전부터 DMB(디지털 멀티미디어 방송)는 국내 차세대 IT먹거리로 손꼽혀온 부분. 국내 상용화(와 활성화)를 발판으로 삼아 해외시장을 선점해나가겠다는 게 국내 입장이다. 실제 그동안 지상파DMB 활성화의 걸림돌로 지적돼 온 이동전화 사업자의 유통 참여가 KTF와 LG텔레콤을 필두로 1월 1일부터 시작됨으로써 지상파DMB 진영을 고무시키고 있는 분위기다.

김운섭 삼성전자 정보통신총괄 부사장

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.181 No.-

소나무류 수관층 및 지표층의 CO₂/non-CO₂ 배출량 분석 연구

박영주,이해평,백창선,Park, Young Ju,Lee, Hae Pyeong,Baek, Chang Sun 한국안전학회 2015 한국안전학회지 Vol.30 No.1

In this study, we carried out the emissions analysis of CO and $non-CO_2$ for the age-classes of various pine trees(Pinus koraiensis, Pinus densiflora, Pinus rigida Mill., Pinus thunbergii Parl.) to estimate of emission factors of the crown layer and surface layer in the forest fire. We used the thermal characteristic analyzer cone heater and NDIR analyzer in order to measure amount of emission. As a result, the major emissions of Pinus koraiensis were $CO_2$ and $CH_4$ and that of Pinus thunbergii Parl. was only CO. The major emissions of the most of pine trees were NO and $N_2O$. The $CO_2$ emission of Pinus thunbergii Parl. was the highest about as $7.26{\times}10^{-2}{\sim}1.63{\times}10^{-1}g$ and next came Pinus densiflora, Pinus koraiensis, Pinus rigida Mill.. And the CO emission of Pinus thunbergii Parl. was about $5.14{\times}10^{-3}{\sim}6.58{\times}10^{-3}g$ and followed by Pinus densiflora, Pinus koraiensis, Pinus rigida Mill.. The emissions of $CH_4$, NO, and $N_2O$ showed small differences between species and the emission of $CH_4$ was $8.37{\times}10^{-5}{\sim}2.55{\times}10^{-4}g$, and NO was $6.65{\times}10^{-5}{\sim}2.0{\times}10^{-4}g$ and $N_2O$ was $1.42{\times}10^{-4}{\sim}2.09{\times}10^{-3}g$ in all species. Particularly, the emission of Pinus thunbergii Parl. was the highest in all pine trees except $CH_4$.

알루미늄 6061 합금의 양극 산화 인가 전압과 시간에 따른 표면의 산화피막층 형성 거동

박영주,정찬영,Park, Youngju,Jeong, Chanyoung 한국전기전자재료학회 2021 전기전자재료학회논문지 Vol.34 No.1

Aluminum is a lightweight metal and has excellent properties with regard to conductivity, workability, and strength. It has been used in various industries owing to its economic benefits. To improve upon the mechanical properties and processability by adding various alloying elements to aluminum, improving the corrosion resistance and heat resistance by electrochemically forming a porous anodic film having a thickness and hardness on the surface of the aluminum alloy is crucial. In this study, the aluminum 6061 alloy was controlled by an anodization process in a 0.3M oxalic acid electrolyte at room temperature to investigate the oxide film parameters such as porosity and thickness depending on the modulating applied voltage and time. The anodizing experiment was performed by increasing the time from 1 h to 9 h at 2-h intervals at applied voltages of 50 V and 60 V.

청폐사간탕(淸肺瀉肝湯)의 혈소판 응집억제 작용에 대한 in vitro 연구

박영주,김슬지,양가은,이미정,이지숙,강덕희,김영찬,이우경,류재환,Park, Young-Ju,Kim, Seul-Ji,Yang, Ga-Eun,Lee, Mi-Jung,Lee, Ji-Sook,Kang, Deok-Hui,Kim, Young-Chan,Lee, Woo-Kyung,Ryu, Jae-Hwan 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.4

Objective : The study was designed to test the anti-platelet effect of the extract Cheongpyesagan-tang and compare it with aspirin in vitro. Methods : The extract from Cheongpyesagan-tang was made by the pharmacy department of Kyung Hee Oriental Medical Hospital. The extract was investigated for inhibition against the collagen induced aggregation of human platelet suspensions on aggregometry. Aspirin and aspirin-Cheongpyesagan-tang were investigated together. Results : 1. In collagen induced human platelet aggregation test, the extract from Cheongpyesagan-tang significantly inhibited in concentration 30mg/ml (p<0.05), 40mg/ml, 50mg/ml (p<0.001) and the effect depended on concentration over 20mg/ml. 2. Aspirin and aspirin-Cheongpyesagan-tang inhibited collagen induced human platelet aggregation significantly (p<0.001). Aspirin-extract of Cheongpyesagan-tang inhibition rate was higher than aspirin only (p<0.05). Conclusions : The extract of Cheongpyesagan-tang has anti-platelet aggregation and synergic effect with aspirin on human platelet in vitro.

산불에 따른 참나무의 화염확산 메커니즘 규명 및 화재조사에 관한 연구

박영주,이해평,Park,Young-Ju,Lee,Hae-Pyeong 한국방재학회 2011 한국방재학회논문집 Vol.11 No.6

본 연구에서는 참나무류를 대상으로 산불에 따른 화염확산 메커니즘과 화재조사를 고찰하였다. 측정 장비로는 콘칼로리미터와 발화온도시험기를 이용하였다. 부위별 무염착화가 진행된 온도범위는 생엽의 경우, <TEX>$346{\sim}382^{\circ}C$</TEX>, 가지 <TEX>$375{\sim}494^{\circ}C$</TEX>, 수피 <TEX>$396{\sim}473^{\circ}C$</TEX> 온도 구간에서 수종별 차이가 있었고, 함수율이 높은 생엽은 무염착화위험성이 상대적으로 높은 것을 확인할 수 있었다. 또한, 발염착화가 진행된 시간을 살펴보면, 생엽 67초, 가지 203초, 수피 23초로서 함수율이 현저히 낮은 수피부위는 빠른 시간에 발염착화 되었으며, 착화 후 가장 오랜 시간 화염이 지속되는 것을 알 수 있었다. 총열방출량은 생엽의 경우 <TEX>$18{\sim}53MJ/m^2$</TEX>, 가지부위 <TEX>$41{\sim}80MJ/m^2$</TEX>, 수피부위는 <TEX>$19{\sim}110MJ/m^2$</TEX> 정도 범위에서 수종별 발열량 차이가 크게 다른 것으로 나타났으며, 굴참나무는 부위별 발열량이 비교적 높은 수종인 것을 확인할 수 있었다. 따라서 산불발생 시 굴참나무 군락지는 발열량이 높기 때문에 높은 화재하중에 따른 화재경로를 파악하는데 중요한 단서가 될 수 있을 뿐만 아니라 최대 화재 밀도지역으로 구분하여 화염확산 및 화재강도 예측에 있어서도 유효한 단서가 될 수 있을 것으로 판단된다. In this study, we considered the mechanism of the flame spread and the fire investigation for oaks by forest fire. Cone calorimeter and ignition temperature tester were used as the equipments for this study. The temperature range of non-flame ignition was <TEX>$346{\sim}382^{\circ}C$</TEX> for living leaves, <TEX>$375{\sim}494^{\circ}C$</TEX> for branches, and <TEX>$396{\sim}473^{\circ}C$</TEX> for barks, respectively, which showed the difference by kind of trees. Thus, it was confirmed that the green leaves with high moisture content had relatively high risk of non-flame ignition. Also, the time of flaming ignition was 67 sec for living leaves, 203 sec for branches, and 23 sec for barks measured, respectively. Accordingly, it was confirmed that bark part with very low moisture content was flamingly ignited in a shorter time and its flame persisted for the longest time after ignition. And, it was shown that total thermal emission was <TEX>$18{\sim}53MJ/m^2$</TEX> for living leaves, <TEX>$41{\sim}80MJ/m^2$</TEX> for branches, and <TEX>$19{\sim}110MJ/m^2$</TEX> for barks, which were quite different by kind of trees. Further, it could be confirmed that the oaks was a kind of tree mostly with high thermal emission by part. Thus, it is determined that its community complex has high thermal emission and large fire load so that it can be a critical clue to understand fire path and a useful clue to forecast flame spread and fire intensity by its classification into the area of greatest fire density.