새로운 전극구조를 통한 수직배향 액정 셀의 투과특성 향상

최용현,손정희,이기동,Choi, Yong-Hyun,Son, Jung-Hee,Lee, Gi-Dong 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.9

본 논문에서는 PVA(Patterned Vertical Alignment)액정 셀의 광투과율 향상을 위한 새로운 전극 구조를 제안하였다. 제안한 전극 구조의 액정 디렉터의 분포 및 광투과율 계산은 상용 시뮬레이터인 'TechWiz LCD'를 사용하였다. 광 시야각을 위한 전극구조에 의해 투과율 감소를 발생시키는 부분에 대해 연구하여 그 부분의 액정 디렉터 분포를 변화시킬 수 있는 구조를 제안하였다. 그리고 기존 PVA모드와 제안한 구조를 사용한 PVA모드의 광투과율을 계산하여 비교하였다. 그 결과로부터 제안한 PVA액정 셀의 광투과율이 높아짐을 확인할 수 있었다. In this paper we propose a novel electrode structure for high transmittance in the Patterned Vertical Alignment (PVA) LC cell. We use the 'TechWiz LCD' for calculation of the director configuration and optical characteristics. We studied the area decreasing the transmittance through the electrode structure for wide viewing angle and proposed new electrode design to change LC director configuration in the area. We show the comparison of the calculated optical transmittance between the conventional PVA mode and the proposed PVA mode. From the results, we confirm that the optical transmittance of the proposed structure of the PVA cell becomes higher.

매복된 거대 견치의 교정적 견인과 reshaping에 의한 치험례

최용현,Choi, Yong-Hyun 대한심미치과학회 2000 Journal of the Korean Academy of Esthetic Dentistr Vol.9 No.1

Usually, orthodontic treatment has been difficult or confused. But orthodontic treatment for prosthodontic/periodontic therapy is usually simple and have a lot of advantages to dental clinicians. Biological occlusion concept is very important in dental treatment of clinician. The following clinical case shows the combination of orthodontic occlusion in the upper arch and normal in the lower.

Sodium Hyaluronate의 악관절강내 주입 효과에 대한 임상적 연구

최용현(Yong Hyun Choi),류선열(Sun Youl Ryu),정훈(Hoon Chung) 대한구강악안면외과학회 1995 대한구강악안면외과학회지 Vol.21 No.3

The purpose of this study was to evaluate the effect of intra-articular injection of sodium hyaluronate in temporomandibular joint. Intra-articular injection with sodium hyaluronate was performed in fourteen advanced temporomandibular joint disorders patients who experienced no improvement from conservative therapy or who had traumatic injury caused by an accident or surgery. We injected sodium hyaluronate to the superior joint cavity and estimated the symptomatic change in the first week and the fourth week after the injection. The results obtained were as follows : 1. The usage of sodium hyaluronate on temporomandibular joint was effective in improving of mouth opening limitation and relieving pain during opening the mouth. It also was effective in reducing clicking but to a less extent. 2. As to the tenderness, no significant effect was found in the first week, but there observed significant effect of reducing tenderness is the fourth week. 3. The conditions of patients showed better improvement in the fourth week than in the first week. Above results suggest that intra-articular injection of sodium hyaluronate was effective for the treatment of advanced temporomandibular joint disorders with degeneration of temporomandibular joint.

토지수용절차에서 사익수용과 생활보상제도에 관한 법적 검토

최용현(Yong Hyun Choi) 한국부동산경매학회 2023 부동산경매연구 Vol.4 No.2

본고의 연구는 인구감소 시대에 있어서 한국, 중국, 일본, 대만 등의 동아시아 4개 국가(jurisdiction)의 토지수용제도 비교연구의 일환으로 실시하였다. 하지만 영미와 독일 및 프랑스 법리도 해당부분에서 언급한다. 중국을 제외하고, 한국·일본·대만의 토지수용 법제에는 모두 독일법의 영향 아래에 있어서 상당한 공통성이 있는 것으로 보이지만 제도의 운용과 이론적 측면에는 적지 않은 차이가 있다. 동아시아 4개국의 법역은 중국의 영향을 받은 일정한 문화적 공통성을 지니고 있으며 근대 이후의 서양법제의 계승이라는 공통의 법 전통을 가지고 있다. 또한 식민지 지배의 불행한 역사가 관련되기는 하지만 제2차 세계대전 이전은 물론 이후에서도 상호 법제도가 영향을 미치면서 발전해 왔다. 본고에서의 논의를 출발점으로 토지수용법제의 비교와 더불어 동아시아 국가에서의 비교법의 일반적인 의의도 밝히는 것이 본 연구의 향후 과제가 될 것이다. 원래 수용과 공공의 이익 두 개념은 긴밀한 관계에 있다. 수용이라는 말을 처음 사용한 것은 ‘전쟁과 평화의 법’이라고 생각된다. 휴고 그로티우스는 정부가 공공이익을 위해 수용하는 권력을 가지며, 게다가 공공이익은 그 수권의 목적과 전제라고 주장하고 있다. 수세기에 걸쳐 대부분의 서양국가들이 그 관점을 받아들였다. 수용권이란 국가가 공공 목적을 위해 사유재산을 점유하는 권력이라는 정의는 고전적인 정의로 인정되어 있다. 세계 여러 나라의 토지수용 제도에서 공공의 이익에 대해 명확한 정의 규정을 두는 나라는 없다. 미국을 대표로 하는 영미법 국가, 독일을 대표로 하는 대륙법 국가 중 어느 쪽에도 공공의 이익에 관한 통설적 견해는 없다. 세계로 눈을 돌리면, 사유재산 제도를 채택하는 국가가 일반적이며, 현대사회에서 토지수용제도의 기본이론은 원래 사유재산제 국가에서 나온 것이다. 사유재산을 보호하는 것을 기본이념으로 하여 행정수용에 있어서의 공권력의 일탈·남용을 회피·제한하기 위해서, ‘수용적격 사업’ 등 일련의 정책이 정해져 있다. 세계 각국의 수용법제의 구조에서 “공공의 이익” 혹은 “공공을 위해서”에 대한 판단과 인정이 수용권을 발동하기 위한 대전제로서 설정되어 있음을 보편적으로 볼 수 있다. 본고는 이와 같은 공익과 사익의 구별에서부터 사적목적의 토지수용과 관련한 법적 문제들을 검토하고, 현대에 들어와 인구감소로 소유자 불명의 토지가 늘어난 상황에 대한 대응을 중심으로 토지수용의 법적 쟁점들을 검토하였다. This research was conducted as part of a comparative study of land use systems in four jurisdictional regions in Korea, China, Japan, and Taiwan in the era of population decline. However, British, USA, German and French laws are also mentioned in that section. Except for China, the land-taking legislation in Korea, Japan, and Taiwan seems to have considerable commonality under the influence of German law, but there are significant differences in the operation and theoretical aspects of the system. The jurisdiction of the four East Asian countries has a certain cultural commonality influenced by China, and has a common legal tradition of the succession of Western legal system after modern times. In addition, although the unfortunate history of colonial dominant is involved, it has developed with reference to the mutual legal system before and after World War II. Starting from the discussion in this paper, the future task of this study will be to reveal the general significance of the comparison method in four East Asian jurisdictions as well as the comparison of the land use legislation system. Originally, the two concepts of takings and publicity are closely related. It is thought that the term “taking of land” was the first to use in the “On the Law of War and Peace(De jure belli ac pacis).” Hugo Grotius claims that the government has the power to taking for the public good, and that the public interest is the purpose and premise of the award. Over the centuries, most western countries have embraced that view. The definition of power of acceptance is the classical definition of the state’s power to possess private property for public purposes. No other country in the world has a clear definition of the public interest in its land use system. Neither the Anglo-American law state represented by the United States nor the Continental law state represented by Germany has a general view of public interest. Turning to the world, countries that adopt private property systems are common, and in modern society, the basic theory of land-taking systems originates from privately owned countries. To protect private property as a basic philosophy, a series of policies, such as “acceptable taking business,” have been established in order to avoid and limit the deviation and abuse of public power in administrative taking. It is universally seen that the judgment and recognition of “for the public” or “for the public” in the structure of the taking laws of countries around the world is set as a premise for activating the right to condemnation. In this article, I examine division of public interests and private interests that is the legal issues related to land taking for private purposes, and examines legal issues in land taking focusing on the response to the situation of unpopular land increase due to population decline.

Anterior repositioning splint의 임상 성적

정훈,최용현,Chung, Hoon,Choi, Yong Hyun 대한악안면성형재건외과학회 1993 Maxillofacial Plastic Reconstructive Surgery Vol.15 No.2

In recent years the relationship between occlusal stability, mandibular position and temporomandibular joint function has been greatly emphasized. Anterior repositiong splint has been used for the purpose of correcting a disk-condyle in coordination, so we have usually wed it in ease of the click of the temporpmandibular joint. We have used anterior repositioning splint in 28 patients who have chief-complain of click in symptoms of the temporomandibular joint arthrosis. At the patients who had long-lasting symptom and sign, late click or degenerative change of the temporomandibular joint, the anterior repositioning splint had less effect on than we had expected. So we are now to report that we must pay attention to use of anterior repositioning spint.

결합재 조건에 따른 콘크리트의 수화발열특성에 관한 실험적 연구

조현태(Jo, Hyun Tae),최용현(Choi, Yong Hyun),김성(Kim, Sung),류득현(Ryu, Deuk Hyun) 한국콘크리트학회 2005 한국콘크리트학회 학술대회 논문집 Vol.2005 No.11

신육성 다수확 밀 익산370호의 원맥과 밀가루의 품질 특성

최용석,이재강,최용현,김영환,강천식,신말식,Choi, Yong-Seok,Lee, Jae-Kang,Choi, Yong-Hyun,Kim, Young-Hwan,Kang, Chon-Sik,Shin, Malsik 한국식품조리과학회 2015 한국식품조리과학회지 Vol.31 No.5

Iksan370 is a long-spike wheat developed by the Rural Development Administration yielding excellent features components such as cold resistance, disease resistance, and viviparous germination. The physicochemical and material properties of the raw wheat and milled flour of Iksan370 were analyzed to derive its appropriate uses. The raw wheat of Iksan370 showed high contents of ash and proteins at 1.71% and 13.7%, respectively. Its test weight of 763.0 g/L was similar to those of other varieties and its 1,000 kernel weight was high at 45.38 g. The milled flour of Iksan370 had an ash content of 0.45%, which corresponds with a class 1 flour, and its protein content is 12.18%, corresponding with strong flour. The damaged starch was 5.41%, which was lower than that of other varieties. The average grain size was $70.67{\mu}m$ and the grain distribution was at the level of a typical hard wheat. In the farinogram, the water absorption was 58.63%, which corresponded to the level of medium flour. The development time was 7.00 minutes, which was significantly lower than those of Jokyung and Keumkang. The degree of softening was 67.00 BU, similar to those of Yunbaek and Baekjoong. Among the physico-chemical characteristics, the high protein content and typical hard wheat grain distribution of Iksan370 were similar to those of strong wheat, usually used for bread making. However, in the farinogram, the dough development time was short and the degree of softening was high. As a result, Iksan370 was expected to have poor breadmaking properties and a small volume of the final bread product due to insufficient dough durability. On the other hand, Iksan370 showed the highest maximum gelatinization viscosity at 864.00 BU. Therefore, Iksan370 is expected to show glutinous texture when used for noodles and its flour appears to be appropriate for frying powders as well.

밀기울의 고압균질처리에 따른 항산화 특성

안은미 ( Eun Mi An ),최용현 ( Yong Hyun Choi ),이재강 ( Jae Kang Lee ),최용석 ( Yong Seok Choi ),김영화 ( Young Hwa Kim ),신한승 ( Han Seung Shin ) 한국산업식품공학회 2015 산업 식품공학 Vol.19 No.1

본 연구에서는 밀기울의 천연 항산화제로서의 식품 소재화를 위하여 밀기울의 고압 균질 처리에 따른 항산화 특성변화를 연구하였다. 고압균질처리는 밀기울의 입자 크기를 효과적으로 줄일 수 있었고, 처리 정도의 증가에 따라 페놀성 화합물의 노출을 크게 증가시켰으며 항산화 활성 또한 연관성 있게 증가시켰다. 이러한 미세화 처리에 의해 입자 크기가 감소함에 따라 밀기울 매트릭스에 결합하거나 바인딩 된 페놀화합물의 항산화 작용기가 노출되어 항산화활성이 향상한다는 것을 명확하게 증명했다. 고압 균질 처리가 비록 페놀산과 섬유소 복합체 사이의 공유결합을 풀거나 페놀 화합물을 방해할 정도로 충분히 강하진 않았지만, 이는 밀기울의 표면 반응성 페놀 함량, DPPH 라디컬소거활성 및 ABTS 라디컬 소거활성을 증가시키는 효과가 있었다. 결론적으로 고압균질처리로 밀기울의 페놀 화합물은 표면반응 메커니즘에 의해 항산화 활성이 향상될 수 있으며, 나아가 천연 항산화제로써 식품산업에서 기능성소재로 활용할 수 있을 것이다. The purpose of this study was to examine the antioxidant properties resulting from high-pressure homogenization of wheat bran. For this purpose, the researcher compared the radicals clearance of DPPH and ABTS, the ferrousion chelating effects, and the contents of the surface-reactive phenol compounds. In the course of this study, it was possible to reduce the particle size of the wheat bran effectively by means of high-pressure homogenization. This also resulted in structural changes, such as changes in the cellular structure of wheat bran, dissipating the cellulose matrix. It was found that this process, in turn, caused the phenol compounds which were entrapped inside the cellulose matrix or bound by polysaccharides to be released, affecting the antioxidation. As the intensity of high-pressure homogenization process increased, the radical clearance of DPPH and ABTS, as well as the surface reactive phenol compound, increased in return, while the ferrous-ion chelating effect decreased without any statistical significance, however (p > 0.05). Therefore, it would be safe to conclude that high-pressure homogenization could be an effective solution to increasing the antioxidant properties of wheat bran, which, in turn, could be used as a functional material (a natural antioxidant) in food industries.

단순 방사선과 자기 공명 영상을 이용한 경골 근위부의 후 경사각의 측정

최충혁(Choong Hyeok Choi),김종헌(Jong Heon Kim),정현기(Hyun Kee Chung),최용현(Yong Hyun Choi) 대한정형외과학회 2001 대한정형외과학회지 Vol.36 No.6

목포항 주변 하구역의 영양염 수지

김영태,최윤석,조윤식,오현택,전승렬,최용현,한형균,Kim, Yeong-Tae,Choi, Yoon-Seok,Cho, Yoon-Sik,Oh, Hyun-Taik,Jeon, Seung-Ryul,Choi, Yong Hyeon,Han, Hyoung-Kyun 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.6

LOICZ(Land-Ocean Interactions in the Coastal Zone) 모델을 이용하여, 목포항 주변의 하구역(영산호 하구역, 영암호-금호호 하구역)에서 일어나는 생지화학적인 순환 과정을 이해하고자 계절별 영양염 수지를 산정하였다. 비성층화 시기인 2008년 5월, 9월, 11월에는 simple three-box model을 적용하였고, 성층이 발생했던 7월에는 two-layer box model을 적용하였다. 물질 수지를 산정한 결과, 5월과 7월에 외해역으로부터 영양염이 역유입되었고, 외해수와의 혼합에 의한 교환($V_{X-3}$, 또는 $V_{deep}$)을 통해 하구역으로 유입되는 영양염(DIP) 부하량이 인공 호수의 대규모 방류 영향을 받은 육상기인 유입량보다 더 많았다. 그리고 9월 물질 수지 결과에서는 하구역과 외해역의 영향을 동시에 받는 하구역 입구(sub-region III)에서 영양염의 과잉 적체가 발생되었다. 저수온기(11월)에 인공 호수(영산호)의 방류 영향이 없는 하구역에서는 영양염이 제거되었고, 담수 방류(영암호-금호호)의 영향을 받은 하구역에서는 수주 내 영양염이 축적되는 것으로 나타났다. 이와 같은 결과들은 목포항 주변 하구역으로 유입되는 영양염들이 육상에서 기인할 뿐만 아니라, 외해역 그리고 하구역 내에서도 추가 공급되고 있다는 점을 시사하고 있다. 따라서 목포항 주변 하구역의 수질 관리를 위해서는 담수를 통한 육상기인 영양염 부하량을 저감하는 방안과 함께, 주변 해안으로의 영양염 유입도 저감하기 위한 통합 환경관리 대책이 수립되어야 할 것으로 판단된다. Land-Ocean Interactions in the Coastal Zone (LOICZ) models for nutrient budgets were used to estimate the seasonal capacity of the Youngsan Estuary and Youngam-Geumho Estuary to sink and/or supply nutrients such as dissolved inorganic phosphorus (DIP) and nitrogen (DIN) to provide an understanding of the behavior of the coupled biogeochemical cycles of phosphorus and nitrogen in the estuaries (Youngsan Estuary, Youngam-Geumho Estuary) near Mokpo Harbor. During non-stratified periods (May, September, and November, 2008), simple three-box models were applied in each sub-region of the system, while a two-layer box model was applied during on-site observation of stratification development (July, 2008). The resulting mass-balance calculation indicated that even after large discharges from artificial lakes (in May and July), DIP influxes due to a mixing exchange ($V_{X-3}$, or $V_{deep}$) were more than terrigenous loads, indicating the backward transportation of nutrients from a marine source. The model results also indicated that for nutrient loads (DIP and DIN fluxes) in September, an extreme congestion of nutrients occurred around the mouths (sub-region III of the model) of the estuaries, possibly due to an imbalance in physical circulations between the estuaries and offshore locations. In November, the Youngam-Geumho Estuary, into which freshwater was discharged from artificial lakes (Youngam and Geumho Lake), showed nutrient enrichment in the water column, but the Youngsan Estuary showed nutrient depletion. In conclusion, to efficiently control water quality in the estuaries near Mokpo Harbor, integrated environmental management programs should be implemented. I.e., the reduction of nutrient loads from land basins as well as the deposit of nutrient loads into adjacent coastal lines.