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.

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.

이산화탄소 지중저장 평가를 위한 실내실험 연구동향

오준호,김구영,김태희,김정찬,Oh, Jun-Ho,Kim, Kue-Young,Kim, Tae-Hee,Kim, Jeong-Chan 대한자원환경지질학회 2010 자원환경지질 Vol.43 No.3

Humanoid Robot의 개발 현황과 전망

Jun-Ho Oh(오준호) 제어로봇시스템학회 2004 제어로봇시스템학회 각 지부별 자료집 Vol.2004 No.11

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.

적외선 영상에서 시공간적 정보 엔트로피를 이용한 소형 표적 검출

오준호(Jun Ho Oh),이상화(Sang Hwa Lee),박종일(Jong-Il Park) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6

HF-IFF: TF-IDF를 응용한 병증-본초 연관성(relevancy) 측정과 본초 특성의 시각화 -청강의감 방제를 대상으로-

오준호 ( Jun Ho Oh ) 대한본초학회 2015 大韓本草學會誌 Vol.30 No.3

Objectives : We applied the term weighting method used in the field of data search to quantify relevancy between symptoms and medicinal herbs, and, based on this, we aim to introduce a method of visualizing the characteristics of medicinal herbs. Methods : We proposed HF-IFF, an adaptation of TF-IDF, which is a term weighting measurement method adapted in the field of data search. Using this method, we deduced relevancy between symptoms and medicinal herbs In Cheongkangeuigam that was published in 1984 by organizing the medical theory of Cheongkang, Kim Younghoon, and visualized this as a graph in order to compare the characteristics of medicinal herbs used for different symptoms. Results : HF-IFF is the product of HF and IFF, where HF is the frequency of the relevant medicinal herb for a set of symptoms, and IFF is the inverse of the number of formulations (FF) containing that herb. A total of 251 types of medicinal herb are used in Cheongkangeuigam, and 1538 formulations are classified according to 67 types of symptom. The overall mean for HF-IFF was 0.491, with a maximum of 4.566 and a minimum of 0.013. Conclusions : In spite of several limitations, we were able to use HF-IFF to measure relevancy between symptoms and medicinal herbs, with formulations as an intermediate. We were able to use the quantified results to visually express the characteristics of the herbs used for symptoms by bubble chart and word-cloud from HF-IFF.

계층적 군집분석(hierarchical clustering)을 통한 침구자생경(鍼灸資生經) 경혈 선택 요인 분석

오준호 ( Jun Ho Oh ) 대전대학교 한의학연구소 2014 한의학연구소 논문집 Vol.23 No.1

Objectives : There are plenty of medical record of acupuncture & moxibustion in Traditional East Asian medicine(TEAM). We performed this study to find out the hidden criteria lies on this record to choose proper acupoints. Methods : 『Zhenjiuzishengjing』, ancient TEAM book was analysed using document clustering techniques. Corpus was made from this book. It contained 196 texts driven from each symptoms. Each texts converted to vector representing frequency of 349 acupoints. Distance of vectors calculated by weighted Euclidean distance method. According to this distances, hierarchical clustering of symptoms was builded. Results : The cluster consisted of five large groups. they had high corelation with body part; head and face, chest, abdomen, upper extremity, lower extremity, back. Conclusions : It assumes that body part of symptom is the most importance criteria of acupoints selecting. some high similar symptom vectors consolidated this result. the other criteria is cause and pathway of illness. some symptoms bound together which had common cause and pathway.

소리의 물리적 새김 -매체의 물질적 매개성과 비주얼 뮤직 형식의 관계-

오준호 ( Jun Ho Oh ),김수철 ( Soo Chul Kim ) 한국기초조형학회 2013 기초조형학연구 Vol.14 No.4

본 논문은 매체의 물질적 매개성과 예술 형식의 관계를 분석하고자 한다. 본 논문은 크게 두 부분으로 구성된다. 전반부에서는 올드미디어인 축음기, 필름, 아날로그 비디오 각각의 시 지각정보의 합성 방식을 분석하고 이에 수반되는 물질적 특성이 예술 형식에 미치는 영 향을 연구한다. 후반부에서는 디지털 미디어의 언어적 매개가 갖는 특성을 분석하고 이 특성이 형식의 임의성 문제를 야기함을 밝힌다. 그리고 최근에 디지털 정보를 물질로 구현하는 새로운 흐름이 형식의 임의성에 제한을 가하기 위해서 매개의 물질적 특성을 회복하려 는 것임을 보이고자 한다. 이를 위해 본 논문은 연구의 대상을 비주얼 뮤직(Visual Music)으로 제한한다. 비주얼 뮤직은 일반적으로 예술가가 이미지와 소리의 관계를 유비적으로 해 석하거나 미디어 기술을 통해서 시청각 정보를 상호 변환하는 작업들을 총칭한다. 비주얼 뮤직 장르에서 작가들은 미디어 기술을 통해 시각과 청각의 상호변환을 실험하기 때문에 개별 미디어 기술의 물질적 특성이 예술 형식에 어떻게 반영되는지를 효과적으로 분석할 수 있다. 본 논문은 과학적, 기술적 혁신이 문화적 지형을 어떻게 바꾸었는지를 연구하는 미디어 고고학 연구 방법을 이용한다. 이를 통해 본 논문은 축음기, 필름, 아날로그 비디오, 디지털 각각의 매개의 물질적 특성을 분석하고 비주얼 뮤직의 형식적 특성에 미치는 영향을 연구한다. 비주얼 뮤직은 시청각적 정보의 상호변환을 통해 예외 상태를 만들고 순수한 매개 성을 드러낸다. 따라서 디지털 미디어에서 물질화는 새로운 매체적 조건에서 매개 성을 가시화하는 방법으로 해석할 수 있다. Analyzing the relationship between materialistic mediacy of medium and art form, this paper is divided into two parts. In the first, this paper analyzes the method of synthesis of audiovisual information of old media such as the gramophone, film, and analog video, and its effects on an art form. In the latter, the paper analyzes the property of linguistic mediation of digital media and reveal that it causes the problem of randomness of art form. The tendency of materialization of digital information is an attempt to recover materialistic property for constraining randomness of art form. For this, the research subject of this paper is visual music. Visual music generally refers to artistic practices to interpret the relationship between image and sound analogically and to convert audiovisual information mutually through media technology. How the materialistic properties of each media technology are reflected in an art form can be effectively analyzed because visual music artists experiment in the mutual conversion of visual and aural percepts. Media archaeology is used to examine how scientific and technological innovations contribute to change the cultural landscape. The materialistic properties of mediation of the gramophone, film, analog video, and digital media are analyzed along with their effects on visual music forms, and the implication of the tendency of materialization in digital media is interpreted. Visual music creates state of exception and reveals pure mediality through transference between visual and auditory cues. Therefore, materialization in digital media can be interpreted as a method to visualize mediality in new medium condition.