조병옥박사편:사심없는 타공일선

조인구 북한연구소 1972 北韓 Vol.- No.7

얼굴 감정을 이용한 시청자 감정 패턴 분석 및 흥미도 예측 연구

조인구,공연우,전소이,조서영,이도훈 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.2

Emotion recognition is one of the most important and challenging areas of computer vision. Nowadays, many studies on emotion recognition were conducted and the performance of models is also improving. but, more research is needed on emotion recognition and sentiment analysis of video viewers. In this paper, we propose an emotion analysis system the includes a sentiment analysis model and an interest prediction model. We analyzed the emotional patterns of people watching popular and unpopular videos and predicted the level of interest using the emotion analysis system. Experimental results showed that certain emotions were strongly related to the popularity of videos and the interest prediction model had high accuracy in predicting the level of interest.

Biocompatibility of Ti-8Ta-3Nb alloy with fetal rat calvarial cells

조인구,최득철,김영준,이경구,이도재,Cho, In-Goo,Cui, De-Zhe,Kim, Young-Joon,Lee, Kyung-Ku,Lee, Doh-Jae The Korean Academy of Periodontoloy 2006 Journal of Periodontal & Implant Science Vol.36 No.4

타이타늄은 기계적 특성이 우수하고 생체적합성이 뛰어나 의료용 장비의 주 재료로 사용되고 있으며 타이타늄 보다 기계적 특성이 더 우수한 타이타늄 합금들(주로 Ti-6Al-4V와 Ti-6Al-7Nb 합금)도 개발되어 치과와 의료용 임플란트로 사용되고 있다. 그러나 타이타늄 합금 성분들 중 알루미늄 (aluminum)과 바나디움(vanadium)은 인체에 노출되면 세포손상과 신경계에 문제를 일으킬 수 있다. 따라서 인체에 독성이 없으면서 기계적 성질과 생체적합성이 우수한 타이타늄 합금의 개발이 필요하다. 최근 인체에 독성이 없는 성분들이 함유된 새로운 ${\beta}$ - 형태의 타이타늄 합금들이 개발되고 있는데, ${\beta}$ - 타이타늄 합금은 그 기계적 성질이 기존의 ${\alpha}+{\beta}$ 타이타늄 합금에 비해 우수하다고 알려져 있다. 최근 새로운 ${\beta}$ - 타이타늄 합금이 전남대학교 부설 타이타늄 연구소에서 개발되었다. 이 연구는 새로 개발된 ${\beta}$ - 타이타늄 합금의 생채 적합성을 세포 증식도, 알카리 인산 분해 효소 활성과 유전자 증폭을 통해 알아보고자 하였다. 그 결과는 다음과 같다; 1. Titanium-6aluminum-4vanadium (Ti-6Al-4V) 합금 표면애서의 세포 증식율은 Titanium-Titanium8Tantalum-3Niobium (Ti-8Ta-3Nb) 합금과 순수 타이타늄 표면에 비해 유의하게 낮았다(p<0.00l). Ti-8Ta-3Nb 합금 표면에서의 증식도는 순수 타이타늄 표면과 유사하였다. 2. Ti-8Ta-3Nb 합금과 순수 타이타늄에서 배양된 세포이 알카리 인산 분해 효소의 활성도는 Ti-6Al-4V 합금에서의 것보다 유의하게 높았다 (p<0.001). 3. 유전자 증폭 분석 결과, Ti-8Ta-3Nb 합금과 순수 타이타늄에서 collagen type I과 bone sialoprotein mRNA 가 유사한 수준으로 발현되었다. 이상의 결과는 생체 적합성 측면에서 Ti-8Ta-3Nb 합금과 순수 타이타늄의 차이가 없음을 보여주며 따라서 Ti-8Ta-3Nb 합금이 의학 및 치의학 영역에서 새로운 임프란트 재료로 사용될 수 있음을 의미한다.

국방획득제도 임차 활성화 방안에 관한 연구(임차 경제성 평가를 중심으로)

조인구,김여중,신영환 한국방위산업학회 2017 韓國防衛産業學會誌 Vol.24 No.2

The purpose of this study is to examine the usefulness of leasing system, one of the methods of acquisition of national defense and to suggest the application of the lease system utilizing the economic evaluation methods and application methods. Although it is written stipulated to choose leasing than purchasing if it may be economically advantageous, specific evaluation standards to assess economic evaluation are not yet established. To solve such problem, this study suggests some issues that could be applied to our military by analyzing domestic and international lease cases. This study suggests equipment life, equipment operating rate, operating maintenance cost as components of lease system economic evaluation. For the operating maintenance cost, which has limitations in correct calculations, this study has referred to the US audit report (2003) and applied the equipment life cost as 72%. The study suggests ①R&D(research development) plus(+) Lease, ②Purchase plus(+) Lease acquisition methods to maximize the advantages of lease system. 국방획득방법 중의 하나인 임차제도의 유용성을 알아보고, 효율적인 임차제도 적용을 위한 경제적 평가 방안 및 획득제도 활용방안을 제시하였다. 훈령 상 임차는 구매 보다 경제성이 유리한 경우로 규정되어 있으나, 경제성 평가를 판단하기 위한 구체적인 평가 기준은 미 정립되어 있다. 이를 개선하기 위해 임차제도의 개념, 국ㆍ내외 임차 사례를 통해 임차제도의 유용성과 우리 군에 주는 시사점을 제시하였다. 임차경제성 평가요소로 장비수명, 장비가동률, 운용유지비를 선정하여 임차 경제성 평가 방법을 수식으로 제시 하였다. 운용유지비용은 산출이 어려운 점을 감안하여 미 회계감사원 보고서(2003년)를 참고하였고 수명주기비용을 72%로 적용하였다. 임차제도의 장점을 최대한 활용하기 위한 획득 방안으로 국방획득 제도의 융합형태인 ①연구개발+임차, ②구매+임차 획득방안을 제시하였다.

Er:YAG laser 조사에 의한 치은연하치석 제거효과

조인구,김영준,김병국,정현주 전남대학교 치의학연구소 2002 구강과학 Vol.14 No.3

The purpose of this in vitro study was to evaluate the efficiency of Er:YAG laser on calculus removal and the morphologic changes and hardness of the irradiated surface at different power settings. This experiment used human teeth which were extracted due to periodontal disease and had a band of calculus. Forty root slabs (5x5mm^2) were made and divided into control group and irradiated groups. Experimental groups were as follows;Control group (root planing), Group 1 (irradiated with laser at 30mj), Group 2(irradiated with laser at 60mJ). and Group 3(irradiated with laser at 100mJ). Twelve root slabs embedded in resin block were used in each group. Er:YAG laser was applied under water irrigation with the tip held perpendicular to the root surface in contact mode. The treatment time was measured until the calculus was removed completely under naked eyes. The efficiency of calculus removal was evaluated by the time for removal. Morphological changes of laser irradiated site were observed under SEM and the surface hardness was measured using a VH tester. The results were as follows; 1. The efficiency of laser scaling was increased with increasing the energy level of irradiation. (p<0.05) 2. The morphological changes such as carbonization, crater and scale-like defects in the irradiated root surface were frequently observed with increasing the energy level. 3. The surface hardness tended to increase at 60mJ and 100mJ irradiated groups than that of control group. From the results evaluting on the efficiency, morphological change, and surface hardness, lower energy level was suggested f'or the clinical application of the Er:YAG laser in scaling.

세포접합인자(Cell Adhesion Molecule) 차단제의 연구 개발

조인구 한국신약개발연구조합 1997 신약뉴스 Vol.5 No.2

Er:YAG laser 조사에 의한 치은연하치석 제거효과

조인구,김영준,정현주,Cho, In-Gu,Kim, Young-Jun,Chung, Hyun-Ju 대한치주과학회 2002 Journal of Periodontal & Implant Science Vol.32 No.2

The purpose of this in vitro study was to evaluate the efficiency of Er:YAG laser on calculus removal and the morphologic changes and hardness of the irradiated surface at different power settings. This experiment used human teeth which were extracted due to periodontal disease and had a band of calculus. Forty root slabs ($5{\times}5mm$) were made and divided into control group and irradiated groups. Experimental groups were as follows; Control group (root planing), Group1 (irradiated with laser at 30mJ), Group2 (irradiated with laser at 60mJ), Group3 (irradiated with laser at 100mJ). Twelve root slab embedded in resin block were used in each group. Er:YAG laser was applied under water irrigation with the tip held perpendicular to the root surface in contact mode. The treatment time was measured until the calculus was removed completely under naked eyes. The efficiency of calculus removal was evaluated by the time for removal. Morphological changes of laser irradiated site were observed under SEM and the surface hardness was measured using a VH tester. The results were as follows; 1. The efficiency of laser scaling was increased with increasing the energy level of irradiation(p<0.05). 2. The morphological changes such as carbonization, crater and scale-like defects in the irradiated root surface were frequently observed with increasing the energy level. 3. The surface hardness tended to increase at 60mJ and 100mJ irradiated groups than that of control group. From the results evaluting on the efficiency, morphological change and surface hardness, lower energy level was suggested for the clinical application of the Er:YAG laser in scaling.

Fe(III) 또는 Cu(II)전처치 Rat에서 급성염증 유발시 Desferrioxamine B와 D-Penicillamine의 영향

조인구,허인회 중앙대학교 약학연구소 1987 약학 논총 Vol.1 No.-

Edema volume, serum copper level, serum iron level and serum cerulopasmin activity was observed in rats pretreated with Fe(Ⅲ). Cu(Ⅱ) for 3 days followed by the administration of their chelating agents desferrioxamine B and D-penicillamine respectively. The results are as follows; 1) Edema volume was decreased significantly in rate pretreared with Fe(Ⅲ). Cu(Ⅱ) for 3 days after carrageenin injection. Serum copper and serum ceruloplasmin activity was decreased also, but serm iron level was not changed significantly. 2) Significant decrease of edema volume was observed followed by the administration of desferrioxamine B in rats edema induced by carrageenin injectin. Serum copper level and serum ceruloplasmin activity was decredsed also. However, significant increase of edema volume was observed followed by the administration of D-penicillamine. Serum copper and serum ceruloplasmin activity was increased also, but serm iron level was not changed significantly. 3) Edema volume was decresed significantly followed by the administration of disferrioxamine B in rats pretreated with Fe(Ⅲ) for 3 days. Serum copper level, serum ceruloplasmin activity was decreased also, but serm iron level was not changed aignificantly. However, edema volume was increased significantly followed by the administration of D-penicillamine in rats pretreated with Cu(Ⅱ) for 3 days. Serum copper level, serum ceruloplasmin activity was increased also, but serum iron level was not changed significantly.

< 반공체제의 강화와 간첩의 색출문제 > 진보당과 사회주의

조인구 대한지방행정공제회 1958 地方行政 Vol.7 No.63

Gresham`s Law of Model Averaging

조인구 AMER ECONOMIC ASSOC 2017 AMERICAN ECONOMIC REVIEW Vol.107 No.11