사춘기전 Ⅰ,Ⅱ급 부정교합 아동의 기도 면적, 혀의 위치와 안면 형태에 관한 연구

황용인,이규홍,이기준,김상철,조형준,천세환,박양호 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.2

본 연구는 사춘기 성장 이전의 I, II급 부정교합을 갖는 아동 환자들의 측모 두부 규격 방사선사진을 이용하여 두개 안면 형태를 조사하고 이들과 혀의 위치 및 면적, 기도의 면적과의 관계를 조사하여 비인두 기도 및 혀의 형태가 악골 및 부정 교합의 형태에 미치는 영향을 알아보았다. 9 - 11세의 교정환자 76명을 대상으로 측모 두부 규격 방사선사진상 ANB difference를 기준으로 대조군(I급 부정교합군: 0 ≤ ANB difference < 4.0)과 실험군(II급 부정교합군: ANB difference ≥ 4.0)으로 분류하였다. 혀 면적, 혀와 구개 사이의 면적, 비인두 기도 면적과 두개안면형태 항목을 측정하고 비교하여 다음과 같은 결과를 얻었다. 혀 면적, 혀와 구개 사이의 면적, 비인두 기도 면적은 II급 부정교합군과 I급 부정교합군 간에 유의한 차이를 보이지 않았다. Hyperdivergent안면 형태일수록 비인두 기도 면적이 좁았다. 안모의 전후방 수직 길이가 길수록 혀의 면적이 넓었고, 전안면 고경이 길수록 혀는 하방위치 하였다. 비인두기도 면적이 좁을수록 혀의 면적도 좁아졌다. 이상의 연구 결과 혀의 면적과 위치, 비인두 기도의 면적은 I급, II급 부정교합 간에 차이를 보이지 않으며 hyperdivergent 안면 형태 및 안모의 전후방 수직 길이와 관련이 있는 것으로 사료된다. Objective: This study examined the craniofacial morphology of young patients in their prepubertal stage showing class I, II malocclusion, by analyzing lateral cephalograms, and analyzed its relationship with tongue position, tongue space, and airway space in order to ascertain the effects of nasopharyngeal airway and tongue morphology on the form of the malocclusion. Methods: Seventy-six patients aging from 9 to 11 were divided into two groups depending on the ANB difference on the lateral cephalogram: Experimental grouP (CI II malocclusion group) showing 0 ≤ ANB difference < 4.0; Control group (CI I malocclusion group) showing 0 ≤ ANB difference < 4.0. The tongue space, space between palate and tongue, nasopharyngeal airway space and craniofacial morphology were compared between the two groups. Results: Tongue space, Palate-tongue space, nasopharyngeal airway space showed no significant differences between class I and class II malocclusion groups. Hyperdivergent faces were associated with smaller nasopharyngeal airway space. Longer anterior facial height and posterior facial height were associated with larger tongue space, and greater anterior facial height were associated with lower tongue position, Smaller nasopharyngeal airway space showed smaller tongue space. Conclusions: Tongue space and nasopharyngeal airway space showed no significant differences between class I malocclusion group and class II malocclusion group. Only anterior facial height and posterior facial height had an influence on tongue space and nasopharyngeal airway space.

TOD형 개발 촉진을 위한 통합교통서비스 지표의 개발

황기연(Hwang Kee Yeon),신상영(Shin Sang Young),조용학(Cho Yong Hak),손기민(Sohn Kee Min) 대한토목학회 2008 대한토목학회논문집 D Vol.28 No.1D

최근 서울시는 TOD 기법을 활용하여 도심을 재활성화하기 위한 대규모 사업을 추진하고 있다. 그런데 TOD형 개발은 고밀개발을 전제로 하기 때문에 교통혼잡이나 환경의 질에 영향을 끼친다. 본 논문의 목적은 도로 뿐 아니라 버스, 지하철 등의 용량을 함께 고려한 통합교통서비스지표를 개발하여 TOD 개발을 촉진하는데 있다. 이를 위해 외국사례를 검토하고, 새로운 통합교통서비스 지표를 개발하고 이를 활용하여 서울시 도심에서 TOD형 고밀개발이 일어났을 때 교통부분의 기대효과를 분석하였다. 본 연구에서 개발한 통합교통서비스지표는 승용차, 택시, 버스로 구성된 도로서비스환경지표와, 지하철서비스환경 지표로 구성되며, 두 개의 지표를 통합하는 방법은 각 교통존별 서비스환경에 각 죤별 수단분담률로 가중평균해서 계산하되, 각 수단분담률의 합은 1로 하였다. 이러한 통합교통서비스환경(ITLOS: Integrated Transportation Level Of Service)의 수치는 0에서 1사이의 값을 가지게 되며, 0에 가까울수록 개발에 필요한 교통여건이 좋은 것으로 해석된다. 본 연구에서 도심고밀개발에 따른 기대효과를 분석하기 위해 대중교통과 도로교통을 동시에 고려한 통합교통서비스지표와 도로 교통서비스 수준만을 고려하는 통행속도 지표를 활용했다. 두 지표 모두 도심 고밀 개발 시 교통서비스 수준은 악화되는 것으로 나타났고 서울시 전체의 교통서비스 수준은 개선되는 것으로 분석되었다. 하지만 통합교통서비스 지표를 사용할 경우 비율적으로 도심교통상황의 악화 정도는 평균속도지표의 경우에 비해 낮게 나타났고, 반면 서울시 전체적인 개선폭은 비율적으로 상당히 높게 분석되었다. Recently, the Seoul Metropolitan Government (SMG) bas initiated several urban redevelopment projects to revitalize the downtown well equipped for transit oriented development (TOD). Since, TOD should incur higher density development in our context, it has negative impacts on travel patterns, congestion, and urban environmental quality. The purpose of this study is to develop new transportation service index which can facilitate higher density TOD. This study includes relevant foreign case studies, the development of multimodal transportation index, and the impact analysis of TOD when it is applied in the downtown Seoul. In chapter Ⅲ, it developed a so-called ITLOS, new multimodal transportation service index which shows the possibility of accommodating further development by integrating roadway service index with public transportation service index. The study sets ten policy scenarios by varying densities, and run the Seoul Congestion Management Model (SECOMM) to estimate the sustainable transportation impacts of TOD in the downtown. Travel speed index that only represents the availability of road capacity for development reveal that higher density development in the downtown can deteriorate traffic congestion while improving region-wide transportation level of service in Seoul. Also, it is proved that higher density development is more feasible when using ITLOS as the index because it considers not only available road capacity but subway capacity in the analysis area.

Belt Source and In-Line Manufacturing Equipment for Very Large-Size AMOLED

Hwang, Chang-Hun,Kim, Yong-Ki,Lee, Tae-Hee,Yu, Sin-Jae,Kim, Sung-Su,Shin, Kee-Hyun,Ju, Sung-Hoo,Kwon, Jang-Hyuk The Korean Infomation Display Society 2006 Journal of information display Vol.7 No.4

The inline manufacturing equipment using a combination of the belt source and LPS source which is innovatively designed is introduced for the large-size AMOLED. The features of the inline system include 60sec TACT time, 19 numbers of chambers, non-substrate bending and easy application to very thin TFT substrates for the $4^{th}$ - $8^{th}$ Generation AMOLEDs.

Biological control of sciarid fly, Lycoriella mali (Diptera: Sciaridae) using Steinernema carpocapsae in button mushroom cultivation house

Yong-Seok Choi,Hwa-Young Seo,In-Su Hwang,Deog-Kee Park 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.10

Isolation and Cultivation of Microorganism Producing Lipoxygenase Inhibitor

Hwang, Ji-Sook,Jeong, Yong-Kee,Lee, Tae-Ho 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1

The microorganisms producing a lipoxygenase inhibitor were screened from a wide variety of sources. The isolated strain was assigned to genus Penicillium by its cultural and morphological characteristics. The proper medium for the production of lipoxygenase inhibitor was composed of glucose 3.0%, ammonium sulfate 0.4%, and potassium phosphate (dibasic) 0.1%. The cultivation for lipoxygenase inhibitor production was carried out in 500ml Erlenmyer flasks containing 100ml of the medium at 30℃ by cultivating reciprocally. The highest lipoxygenase inhibitor production was observed after 8 days of cultivation. The inhibitor was the low molecular weight substance and inhibited specifically soybean origin lipoxygenase.

Modeling Technology on Free-form Surface of a New Military Personal Head using Quick Surface Method

Yong-Moon Lee(이용문),Tae-Son Hwang(황태선),Hun-Kim(김훈),Hee-Tae Nam(남희태),Kee-Hwan Lee(이기환),Myungchang Kang(강명창) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.6

Recently, weapon system requires personal protection products due to the explosion of rapid-fire explosion, which is considered to be multi threat in modernization, complication and war against terrorism. However, the conventional Korean military bullet protection helmets are not suitable for wearing convenience and combatant interoperability in terms of ergonomic. In this paper, we propose a suitable 3D Scanning method for the head, and compare the measured 3D dimension with the existing 2D measurement value to identity the reliability. Reverse engineered soldier head using the quick surface method was realized with a perfect free-form surface and satisfactory tolerance range (±0.2 mm). Through the comparison of 3D and 2D measured head dimensions, the absolute error value was 0.73 mm on average and relative error was 0.35 %, confirming the high accuracy of the 3D scan modeling. Also, quick surface method using 3D scanner is suggested a fast and accurate skill for ergonomics in obtaining the head modeling needed for military’s personal bullet protection helmet design.

Distribution of Metcalfa pruinosa (Hemiptera: Flatidae) in Chungnam proince and host preference of its nymphs

Yong-Seok Choi,Hwa-Young Seo,In-Su Hwang,Deog-Kee Park 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.10

Recombinant Expression and Purification of Functional XorII, a Restriction Endonuclease from Xanthomonas oryzae pv. oryzae

Hwang, Dong-Kyu,Cho, Jae-Yong,Chae, Young-Kee The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.2

An endonuclease from Xanthomonas oryzae pathovar oryzae KACC 10331, XorII, was recombinantly produced in Escherichia coli using a T7 system. XorII was purified using a combination of ion exchange and immobilized metal affinity chromatography (IMAC). An optimized washing protocol was carried out on an IMAC in order to obtain a high purity product. The final amount of purified XorII was approximately 2.5 mg/L of LB medium. The purified recombinant XorII was functional and showed the same cleavage pattern as PvuI. The enzyme activity tested the highest at $25^{\circ}C$ in 50 mM NaCl, 10 mM Tris-HCl, 10 mM $MgCl_{2}$, and 1 mM dithiothreitol at a pH of 7.9.

土地利用强度를 利用한 共同住宅團地의 屋外空間規模設定에 關한 硏究

黃琪鉉,安建鏞 서울대학교농과대학농업개발연구소 1989 서울대농학연구지 Vol.14 No.1

The purpose of this study was to offer the optimum size of outdoor space in multifamily housing by intensifying land use intensity standards. First, to find out some tendencies of open space ratio relating to site conditions, site data of existing 124 sites were analyzed. Second, to estimate minimum standard of open space ratio, livability space ratio and recreation space ratio, the data were gathered from a questionnaire through 18 apartments complex in Seoul, Suwon, Daejeon and Jeonju with regards to resident's satisfaction at outdoor space. The data were analyzed by using correlation and regression through PC-SAS. Tendencies of open space ratio in 124 sites are summarized as follows. 1. The scale of site (land area, floor area, dwelling units) is rarely related to open space ratio. 2. Open space ratio of the site in local city is lower than that of Seoul. 3. Site of Public developer(KNHC) is superior to that of private developer (Hyundai) in OSR. 4. There is no relation between distance from city center and LIR. These results show that open space ratio must be determined in consideration of density, region and developer. With regards to resident's satisfaction at outdoor space; 1. As respondent is older and lower-educated, he is more satisfied with outdoor space. 2. Male is less satisfied with outdoor space than female. 3. Income and vocation of respondent don't influence on satisfaction. So questionnaire must be established in consideration of these variables. In relation to residential type; 1. High-rise apartments are superior to low-rise apartments in total satisfaction. 2. High-rise apartments are superior to low-rise apartments in satisfaction of sunshine condition, privacy and view. 3. Low-rise apartments are superior to high-rise apartments in satisfaction of livability and recreation space. These results show that sunshine, privacy and view have more influence on total satisfaction than livability and recreation space. And minimum land use intensity standards of high-rise site were estimated at the level of 50% user's satisfaction from the regression. 1. Minimum open space ratio of 0.45 was estimated, it is higher than standard of FHA, and lower than 0.5 that is estimated by Sato in Japan. 2. Minimum livability space ratio of 0.36 that is higher than standard of FHA was estimated, which shows relative shortage in road and parking space. 3. Estimated minimum recreation space ratio of 0.05 is lower than 0.07 of FHA, which shows that more recreation space will be needed. Through the analysis process, these estimated standards are not absolute and must be developed to be applied to new town construction and local development as a tool of outdoor design and assessment.

Status of extension service on farmers adopting biological control practice

Yong-Seok Choi,Hwa-Young Seo,In-Su Hwang,Deog-Kee Park 한국농약과학회 2018 한국농약과학회 학술발표대회 논문집 Vol.2018 No.10