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18세기 한일 침구학의 교류 - 조선통신사 의학문답기록을 중심으로 -
오준호,차웅석,Oh, Jun-Ho,Cha, Wung-Seok 경락경혈학회 2006 대한침구의학회지 Vol.21 No.4
Objectives: The subject of this research is the catechism on medicine between the doctors of Joseon and Japan in the 18th century through Choson Delegation(朝鮮通信使 ). Methods: The author intended to review and analyze the contents of catechism related to Acupuncture and Moxibustion and determined the characteristics of Joseon and Japan ?s Acupuncture and Moxibustion. Results: At the time, Japanese doctors had a grasp on most theories of Acupuncture and Moxibustion and were very specialized clinically. They usually used filiform needles with various techniques, and already they had many different schools in practice. However, they wanted to know if their Acupuncture and Moxibustion skills were up to the international standard, especially to Joseon, whom they regarded as a country advanced in Acupuncture and Moxibustion. They wanted to com- pare and contrast their Acupuncture and Moxibustion with Joseon's. 18th century Joseon was high time for Acupuncture and Moxibustion. Various tools were used in surgery, and varieties of needles were used to stimulate acupuncture points. The development of tools evinces the precision of Joseon's Acupuncture and Moxibustion at the time. Also, comprehensive works such as DongUiBoGam(東醫寶鑑) and UiHaklpMun( 醫學入門) greatly influenced Acupuncture and Moxibustion. Because of this impact, it can be deduced that Acupuncture and Moxibustion emphasizing Jang(臟) and Bu(腑) organs and Internal Injury developed greatly. In addition, acupuncturist Holm(許任)'s fame continued from the 17th century into the 18th century, and his medical practice left a huge mark on not only Joseon but other eastern Asian countries as well. Conclusions: We found out the evidences that there were a lot of exchanges of acupuncture and moxibustion between Korea and Japan based of the Joseon TongShinSa (Emissary)'s record of catechism on medicine in the 18th century.
Resonance Frequency Analysis(RFA)를 이용한 임플란트 종류간의 초기 안정성 비교
오준호,장문택,Oh, Jun-Ho,Chang, Moon-Taek 대한치주과학회 2008 Journal of Periodontal & Implant Science Vol.38 No.3
Purpose: The objective of this study was to compare initial implant stability measured by RFA between different implant systems during the initial healing period. Material and Methods: Fifty-four patients (36 males/18 females) who had been treated at the Department of Periodontology, Chonbuk National University Dental Hospital during the period between January and November in 2007 were included in the study. The mean age of the subjects was 49 years old (18 to 77). A total of 104 implants (Type A: 3i $Osseotite^{(R)}$, Type B: $Replace^{(R)}$ select, Type C: ITI implant) were placed following the manufacturer's standard surgical protocols. Implant stability quotient (ISQ) readings were obtained for each implant at the time of surgery, 2-, and 4-month postoperatively. Result: No implant was failed during the observation period. At the baseline, the difference between mean ISQ values of 3 implant systems was statistically significant (p<0.05). However, at 2-, and 4-month following implant surgery, no significant difference was observed between ISQ values of the implant systems. In the same implant, the ISQ values of Type B and C implants increased (p<0.05), but those of Type A implants decreased during the 2-month healing period. The mean ISQ values of Type B and C implants showed a increasing tendency, while those of Type A implants were stable for the 4-month follow-up period. Conclusion: Within limits of this study, it can be concluded that implant design and surface topography of implant might influence the ISQ value and changing pattern during the initial healing period.
하상 인공구조물에 의해 유도되는 지하수-하천수 시스템의 상호작용
오준호,김태희,성현정,김용제,송무영,Oh, Jun-Ho,Kim, Tae-Hee,Sung, Hyun-Cheong,Kim, Yong-Je,Song, Moo-Young 한국지하수토양환경학회 2007 지하수토양환경 Vol.12 No.2
본 연구는 하상인공구조물에 의해 유도되는 지하수-하천수 시스템의 상호작용을 지하수 순환을 중심으로 연구하였다. 연구지역은 충청남도 금산군 남이면 건천리의 남이휴양림으로 연구의 목적을 달성하기 위해 수리물리적 방법(수위관측)과 수리화학적 특성(pH, EC, 주 이온분석)을 분석하였으며, 이들 자료간의 연관성을 파악하기 위해서 상호상관분석을 실시하였다. 수리물리적 방법에 의한 연구결과 하상 보 수평부의 BH-14의 수위변동은 다른 지하수관정과 비교 할 때 이중퇴행양상이 빈번하게 나타났으며, 그 폭도 크게 나타났다. 또한, 수리화학적 방법에 의해 얻은 결과를 자연추적자의 개념으로 사용해 보면 지하수인 BH-14가 하천에 유사한 성향을 나타내었다. 상관성분석결과에서 수리물리적 측면인 수위에 대한 상관성분석에서 BH-14와 하상 보에서 가장 높게 나타났으며, 반면 수리화학적 측면에 대한 상관성분석에서는 하상 보와 다리의 상관성이 가장 높게 나타났다. 이는 수위와 같은 물리적 상호작용은 용질거동 없이 압력의 전파에 의해 일어나는데 반하여 수리화학적 상호작용은 용질의 거동에 의해 반응이 일어나기 때문에 더 많은 시간이 걸리기 때문인 것으로 판단된다. 결과적으로 하상의 불투수성의 보에 의해 하천과 주변대수층의 경계조건이 바뀌고, 이때 지하수 시스템으로 유입되는 하천수에 의해 BH-14의 수위가 즉각적으로 상승하며, 수질에서 하천수적 성향을 나타내는 것으로 판단된다. 이러한 현상은 보의 수위가 높아질수록 더욱 증가하는 경향을 나타낸다. This study investigated the interaction between groundwater and stream water systems, which is caused by the artificial weir on streambed, enforcing external stresses on the groundwater system. The study area is in Nami Natural Recreation Woods located in Chungcheongnam-do Geumsan-gun Nami-myeon Geoncheon-ri. In this study both of hydrophysical methods (hydraulic head) and hyrdochemical investigations (pH, EC, major ion analysis) were applied. In order to identify the relationship between each of study results, cross-correlation analysis is performed. From results of hydrophysical methods, water level fluctuation at BH-14, installed by the weir, shows the double-recession pattern much more frequently and much higher amplitudes than the fluctuation at each of other monitoring wells. Using the results by hydrochemical investigations, hydrochemical properties at BH-14 is similar to the hydrochemical characteristics in stream water. To analyze the interrelationships between the results from each of applied methods, cross-correlation analysis was applied. Results from the correlation analyses, water levels at BH-14 and stream weir showed the highest cross-correlation in hydrophysical aspects. On the other hand, the correlation between stream weir and bridge was the highest in hydrochemical aspects. The difference between the results from each of methods is due that the hydrophysical response at BH-14, such as water level, is induced by the pressure propagation-not with mass transfer, but the hydrochemical interaction, caused by mass transport, takes much more times. In conclusion impermeable artificial weir on streambed changes the interfacial condition between the stream and surrounding aquifers. The induced water flux into the groundwater system during flood period make water level at BH-14 increase instantly and groundwater quality higly similar to the quality of stream water. Referred similarities in both of water level and water quality at BH-14 become much higher when water level at weir grow higher.
오준호(Jun-Ho Oh) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.3
본 논문은 알고리즘이 물질성과 표현성을 획득할 수 있음을 라이브 코딩을 통해 연구한다. 라이브 코딩은 실시간으로 코드를 작성하면서 소리를 생성하고, 코드를 스크린에 투사하는 즉흥 음악 장르이다. 기존의 라이브 코딩 연구는 공연을 효과적으로 뒷받침할 수 있는 개발 환경에 초점을 맞추어 왔다. 그러나 본 연구는 라이브 코딩에서 주로 활용되는 ChucK, Impromptu, 라이브 코드의 시각화의 언어적 특성 분석과 aa-cell과 slub의 실제 공연 사례 분석을 통해 알고리즘 구현에 내재된 미학적 태도를 연구한다. 라이브 코딩의 미학적 태도는 대수적 태도와 기하학적 태도로 나눌 수 있다. 대수적 태도는 시간상에 순차적인 개념의 전개에 초점을 맞추고, 기하학적 태도는 개념의 구조를 공간상에 시각적 구조로 물질화하는데 중심을 둔다. 이러한 태도의 차이는 개념시와 구체시를 통해 표명된 개념과 물질 사이의 긴장 관계가 라이브 코딩에서 유사하게 반복된다는 것을 의미한다. 라이브 코딩에서 언어에 대한 입장이 개념과 물질 중에서 무엇을 강조하는가에 따라 알고리즘의 표현성이 규정된다. This paper researches the algorithm, whose materiality and expressiveness can be obtained through live coding. Live coding is an improvised genre of music that generates sounds while writing code in real time and projecting it onto a screen. Previous studies of live coding have focused on the development environment to support live coding performance effectively. However, this study examines the aesthetic attitude immanent in the realization of the algorithm through analyzing mostly used languages such as ChucK, Impromtu, and the visualization of live code and cases of aa-cell and slub performance. The aesthetic attitudes of live coding performance can be divided into algebraic and geometric attitudes. Algebraic attitudes underline the temporal development of concepts; geometric attitudes highlight the materialization of the spatial structure of concepts through image schemas. Such a difference echoes the tension between conception and materiality, which appears in both conceptual and concrete poetry. The linguistic question of whether conception or materiality is more greatly emphasized defines the expressiveness of the algorithm.
Convolutional Neural Network Architecture 에 따른 Cone beam artifact 제거 성능 비교
오준호(Jun-Ho Oh),김병준(Byeong-Joon Kim),백종덕(Jong-Duk Baek) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
CBCT(Cone beam CT) is widely used in diagnosis and treatment planning of implant dentistry, orthopedics, and interventional radiology. However, the reconstructed images by CBCT geometry generate cone beam artifacts, which would disturb lesion detectability and degrade diagnostic accuracy. In this work, we present convolutional neural network(CNN) based cone beam artifacts correction method, which is computationally efficient and achieve better performance in artifact correction. We compared the performance of the cone beam artifacts reduction via U-Net and ResNet models, which are trained with simulated CBCT images. Our result showed that U-Net performs better than ResNet in cone beam artifact reduction.
23게이지 미세절개유리체절제술 후 안구 표면 pH의 단기 변화
오준호(Jun Ho Oh),박수진(Su Jin Park),강동진(Dong Jin Kang),강용구(Yong Koo Kang),신재필(Jae Pil Shin),박동호(Dong Ho Park) 대한안과학회 2021 대한안과학회지 Vol.62 No.2
목적: 23게이지 미세절개유리체절제술 후 안구 표면 pH의 변화를 알아보고자 하였다. 대상과 방법: 23게이지 미세절개유리체절제술을 시행한 42명의 환자를 대상으로 후향적 연구를 시행하였다. 유리체절제술 전과 후의 최대교정시력과 안압을 측정했으며 안저검사, 컬러안저촬영, 빛간섭단층촬영을 시행하였다. 수술 후 1일에 결막부종의 등급에 대하여 평가를 시행하였으며 안구표면 pH는 미세전극이 연결된 pH 측정기를 이용하여 수술 전날부터 수술 후 5일까지 양안에 매일 1회 측정 하였다. 결과: 총 42명, 42안이 대상 연구에 포함되었다. 평균 연령은 63.7세였으며 수술의 적응증으로는 망막전막이 14안(33.3%), 유리체출혈이 11안(26.2%), 황반원공이 11안(26.2%), 열공망막박리가 6안(14.3%)을 차지했다. 안구 표면 평균 pH는 수술 후 1일째에 7.12 ± 0.04에서 7.55 ± 0.04로 증가하였으나(p<0.001), 수술 후 2일째부터 7.41 ± 0.03으로 점차 감소하여(p<0.001), 3일째에 7.33 ± 0.04(p<0.001), 4일째에 7.23 ± 0.03 (p<0.001)로 측정되었다. 수술 후 5일째 안구 표면 pH는 7.15 ± 0.03 (p=0.152)으로 더욱 감소하여 수술 전 상태로 회복되었다. 또한, 수술 후 1일째 안구 표면 pH와 결막부종의 등급은 통계적으로 유의한 상관관계를 보였다(p=0.001). 결론: 23게이지 미세절개유리체절제술 후 안구 표면 pH는 일시적으로 알칼리성 변화를 보이며 이는 결막부종, 눈 속 충전물 삽입과 유의한 상관관계를 보인다. Methods: This retrospective study included 42 patients who underwent 23-gauge microincision vitrectomy. Best-corrected visual acuity and intraocular pressure were measured. Fundus examination, color fundus photography, and spectral-domain optical coherence tomography were performed. Chemosis was evaluated once a day after surgery, and the ocular surface pH was measured using a microelectrode on the day before surgery and every day up to day 5 after surgery. Results: A total of 42 eyes in 42 patients were examined. The average age was 63.7 years. The indications for surgery included epiretinal membrane in 14 eyes (33.3%), vitreous hemorrhage in 11 eyes (26.2%), macular hole in 11 eyes (26.2%), and rhegmatogenous retinal detachment in six eyes (14.3%). Although the mean ocular surface pH increased from 7.12 ± 0.04 to 7.55 ± 0.04 on the first day after surgery (p < 0.001), it gradually decreased to 7.41 ± 0.03 from the second day postoperatively (p < 0.001). It was subsequently measured as 7.33 ± 0.04 on the third day (p < 0.001) and 7.23 ± 0.03 on the fourth day (p < 0.001) postoperatively. On the fifth postoperative day, the ocular surface pH further decreased to 7.15 ± 0.03 (p = 0.152) and recovered to the preoperative state. A statistically significant correlation was found between the change in ocular surface pH and the chemosis grade (p = 0.001). Conclusions: After 23-gauge microincision vitrectomy surgery, the ocular surface pH shifted temporarily in the alkaline direction within a physiological range correlated with chemosis and intravitreal tamponade usage.
오준호(Jun Ho Oh),이상화(Sang Hwa Lee),이부환(Boo Hwan Lee),박종일(Jong-Il Park) 제어로봇시스템학회 2011 제어로봇시스템학회 합동학술대회 논문집 Vol.1 No.2
본 논문에서는 스테레오 열상카메라를 이용하여 고온 및 고속으로 날아가는 이동체(표적)의 거리를 실시간으로 측정하는 시스템을 제안한다. 표적과 주변 환경의 온도 차이를 측정하고 고속으로 이동하는 표적의 거리를 자동으로 측정하기 위하여 열화상 스테레오 카메라 시스템을 구축하였다. 우선 열상카메라를 이용하여 취득한 고온의 표적영상으로부터 주변의 온도분포와 표적간의 온도차를 이용하여 표적영역을 검출하고, 표적의 움직임 정보와 열상 카메라 영상의 밝기정보를 결합하여 표적을 추적한다. 좌우 열상 카메라 영상에 대하여 각각 추출된 표적 영역을 중심으로 스테레오 정합을 수행하여 시차정보를 주정하고, 카메라 파라미터와 시차정보를 이용하여 실시간으로 이동하는 표적의 거리를 추정한다. 본 논문에서 제안하는 열상 스테레오 카메라 시스템을 검증하기 위하여 고온의 이동체를 촬영할 때, 3차원 궤적(x,y,z) 측정기를 함께 가동하여 표적이 이동하는 거리를 측정하여 이를 기준 거리로 설정하였다. 3차례의 비디오 데이터로부터 실험한 결과, 열화상 스테레오 카메라를 이용한 고온/고속의 이동체의 거리오차 측정 결과는 평균적으로 9.68%로 추정되었다. 스테레오 열상카메라의 타이밍 문제(jitter)를 고려하면, 실제로 추정 오차는 줄어들 것으로 판단되기 때문에, 향후 열화상카메라를 이용하는 다양한 표적의 거리 및 위치를 측정하는데 응용할 수 있을 것으로 기대된다.
18세기 한일 침구학의 교류 -조선통신사 의학문답기록을 중심으로-
오준호 ( Jun Ho Oh ),차웅석 ( Wung Seok Cha ) 대한경락경혈학회 2006 Korean Journal of Acupuncture Vol.23 No.2
Objectives: The subject of this research is the catechism on medicine between the doctors of Joseon and Japan in the 18th century through Choson Delegation(朝鮮通信使). Methods: The author intended to review and analyze the contents of catechism related to Acupuncture and Moxibustion and determined the characteristics of Joseon and Japan`s Acupuncture and Moxibustion. Results: At the time, Japanese doctors had a grasp on most theories of Acupuncture and Moxibustion and were very specialized clinically. They usually used filiform needles with various techniques, and already they had many different schools in practice. However, they wanted to know if their Acupuncture and Moxibustion skills were up to the international standard, especially to Joseon, whom they regarded as a country advanced in Acupuncture and Moxibustion. They wanted to compare and contrast their Acupuncture and Moxibustion with Joseon`s. 18th century Joseon was high time for Acupuncture and Moxibustion. Various tools were used in surgery, and varieties of needles were used to stimulate acupuncture points. The development of tools evinces the precision of Joseon`s Acupuncture and Moxibustion at the time. Also, comprehensive works such as DongUiBoGam(東醫寶鑑) and UiHakIpMun(醫學入門) greatly influenced Acupuncture and Moxibustion. Because of this impact, it can be deduced that Acupuncture and Moxibustion emphasizing Jang(臟) and Bu(腑) organs and Internal Injury developed greatly. In addition, acupuncturist HoIm(許任)`s fame continued from the 17th century into the 18th century, and his medical practice Left a huge mark on not only Joseon but other eastern Asian countries as well. Conclusions: We found out the evidences that there were a Lot of exchanges of acupuncture and moxibustion between Korea and Japan based of the Joseon TongShinSa (Emissary)`s record of catechism on medicine in the 18th century.