Cone Beam Computed Tomography의 두부계측분석을 통한 골격성 제3급 부정교합 환자에서 악교정 수술 후 입술과 주위 연조직의 수직적 변화

이종민,강주완,이종호,김창현,박재억,Lee, Jong-Min,Kang, Joo-Wan,Lee, Jong-Ho,Kim, Chang-Hyen,Park, Je Uk 대한악안면성형재건외과학회 2012 Maxillofacial Plastic Reconstructive Surgery Vol.34 No.5

Purpose: The aim of this study is to evaluate the vertical changes of the lip and perioral soft tissue, following orthognathic surgery in skeletal class III patients by a cephalometric analysis of a cone beam computed tomography (CBCT). Methods: A total of 20 skeletal class III patients, who had bimaxillary surgery with Le Fort 1 osteotomy and bilateral sagittal split ramus osteotomy, were included in this study. The surgical plan for maxilla was posterosuperior impaction with the anterior nasal spine, as the rotation center. Further, the surgical plan for mandible was also posterosuperior movement. The soft tissue changes between lateral cephalogram and CBCT were compared. And the correlations between independent variables and dependent variables were evaluated. Results: There were no significant differences of the soft tissues changes between lateral cephalogram and CBCT. Upper lip philtrum length (SnLs), nasolabial angle increased and upper lip vermilion length (LsStms), lower lip length (StmiB'), lower lip vermilion length (StmiLi), lower lip philtrum length (LiB') and soft tissue lower facial height (SnMe') decreased after surgery. Change of SnLs (${\Delta}$SnLs) was influenced by vertical change of menton (${\Delta}$MeV), and change of LsStms (${\Delta}$LsStms) was influenced by upper lip thickness (ULT). Change of StmiLi' (${\Delta}$StmiLi') were influenced by preoperative overjet. Change of StmiB' (${\Delta}$StmiB') were influenced by preoperative overjet, vertical change of lower incisor (${\Delta}$L1V) and horizontal change of posterior nasal spine (${\Delta}$PNSH). Change of LiB' (${\Delta}$LiB') was influenced by ${\Delta}$L1V and ${\Delta}$PNSH. Change of SnMe' (${\Delta}$SnMe') was influenced by ${\Delta}$MeV, horizontal change of upper incisor (${\Delta}$U1H) and horizontal change of lower incisor (${\Delta}$L1H). ${\Delta}$Nasolabial angle was influenced by change of ULT (${\Delta}$ULT). Conclusion: Both soft tissues and hard tissues can be evaluated by CBCT. Posterosuperior rotation of maxillomandibular complex resulted in increase of upper lip philtrum length and nasolabial angle, while the upper lip vermilion length, lower lip philtrum length, lower lip vermilion length, and soft tissue lower facial height showed a decrease.

Barkhausen noise를 이용한 1Cr-1Mo-0.25V강의 열화도 평가

이종민,안봉영,남승훈,이승석,이억섭,남영현,Lee, Jong-Min,Ahn, Bong-Young,Nahm, Seung-Hoon,Lee, Seung-Seok,Lee, Ouk-Sub,Nam, Young-Hyun 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.7

It is inevitable to evaluate the life of turbine rotor because the operating periods of power plants need to be extended. For the test, seven kinds of specimens with different degradation levels were prepared by the isothermal heat treatment at $630^{\circ}C$. Magnetic methods utilizing Barkhausen noise coercive force($BN_c$) were applied to detect the degradation caused by thermal aging. Magnetic property of material is related with domain dynamics and that is affected by the microstructure of material. Therefore $BN_c$ is very sensitive to the microstructure change of the material. With the increase of degradation, $BN_c$ was decreased and this phenomenon is considered due to precipitations and grain size. The result was compared with Vickers hardness($H_v$) and coercive force($H_c$) to detect the relative variation, and was related with $H_v$ and YS to estimate the change of the mechanical properties with the degradation.

제강슬래그 아스팔트혼합물의 도로포장 성능 평가

이종민,이윤모,이진우,Lee, Jong-Min,Lee, Yun-Mo,Lee, Jin-Woo 한국건설순환자원학회 2021 한국건설순환자원학회지 Vol.16 No.2

자기부상열차용 분기장치 개발현황

이종민,Lee, Jong-Min 재료연구소 2006 機械와 材料 Vol.18 No.2

애드혹 네트워크에서의 가상 그리드 기반 라우팅 알고리즘

이종민,김성우,Lee, Jong-Min,Kim, Seong-Woo 한국시뮬레이션학회 2007 한국시뮬레이션학회 논문지 Vol.16 No.2

본 논문에서는 애드혹 네트워크에서 위치 정보, 에너지 수준 등을 이용하여 효율적인 라우팅 방법을 고안할 수 있도록 기본이 되는 가상 그리드 기반 라우팅 알고리즘을 제안한다. 목적지 노드의 위치 정보에 기반을 두어 패킷을 X축으로 재전송하다가 X축 관점에서 목적지에 근접하면 Y축 방향으로 재전송을 한다. 임의의 노드에서 목적지 노드로 패킷을 전달하기 위한 다음 홉 노드 선택으로 인하여 전체 네트워크를 가상 그리드 네트워크로 생각할 수 있다. 제안된 라우팅 알고리즘은 목적지와 자신의 이웃 노드 위치 정보와 같은 국부적인 정보만을 사용하여 라우팅 경로를 결정한다. 따라서 라우팅 경로 설정이 국부적으로 이루어져 네트워크 트래픽이 감소하고, 목적지로의 전달 지연시간이 줄어들 것으로 기대된다. 제안된 라우팅 알고리즘의 성능 평가를 위하여 네트워크 시뮬레이터 ns2를 사용하였으며, 기존의 라우팅 알고리즘과 네트워크 처리율을 비교해 보았다. In this paper, we propose a basic virtual grid-based routing algorithm in order to devise an efficient routing method in ad hoc networks using the location information of nodes, energy level, etc. A packet is forwarded to the X-axis direction at first based on the location information of a destination node, and then it is forwarded to the Y-axis direction as its location becomes close to the destination from the viewpoint of the X-axis. Due to the selection of next hop nodes to deliver a packet from a certain node to a destination node, we can regard the whole network as a virtual grid network. The proposed routing algorithm determines routing paths using the local information such as the location information of a destination and its neighbor nodes. Thus, the routing path setup is achieved locally, by which we can expect reduction in network traffics and routing delays to a destination. To evaluate the performance of the proposed routing algorithm, we used the network simulator ns2 and compared its network throughput with that of an existing routing algorithm.

${\beta}-Lactamase$ 억제작용이 기대되는 7-Arylidene Cephalosporanate 유도체의 합성

이종민,임철부,임채욱,Lee, Jong-Min,Yim, Chul-Bu,Im, Chae-Uk 대한약학회 2008 약학회지 Vol.52 No.4

The synthesis of 7-arylidene cephalosporanates for ${\beta}-lactamase$ inhibitor was described. The reactions of substituted benzyl halides $[1]{\sim}[3]$ with triphenylphosphine gave triphenylphcsphonium chlorides $[4]{\sim}[6]$. These phosphonium salts were treated with n-butyllithium to give ylides, which were reated with 7-oxocephalosporanate [7] by Wittig reaction to afford the 7-exomethylene cephalosporanates $[8]{\sim}[10]$. These cephalosporanates were oxidized to cephalosporanate sulfones $[11]{\sim}[13]$ with mCPBA. The deprotection of benzhydryl cephalosporanate $[8]{\sim}[13]$ with $AlCl_3$ and $NaHCO_{3}$ gave sodium salts of 7-arylidene cephalosporanates $[14]{\sim}[19]$.

근접굴착 시 기존건물의 영향을 받는 터널의 거동

이종민,Lee, Jong-Min 한국터널지하공간학회 2018 한국터널지하공간학회논문집 Vol.20 No.3

건물하중의 영향을 받는 상태의 기존터널에 근접해서 터널보다 깊은 심도로 지반을 굴착하는 경우에 흙막이벽체의 거동이 기존터널의 존재로 인해 큰 영향을 받는 것으로 알려져 있다. 그런데 지상 구조물에 의해 받는 영향에 대한 연구 예가 많지 않다. 따라서 본 연구에서는 기존터널에 근접하여 지반을 굴착할 때 기존터널이 상부구조의 영향을 받는 상태에서 건물 위치에 따른 터널의 거동을 대형모형실험과 수치해석을 실시하여 측정하였다. 이를 위해 지표면에 건물하중이 없는 경우와 건물하중이 3가지 이격거리에 위치한 경우(0 m, 1D, 2D)에 대하여 각각 대형모형실험을 수행하였다. 본 논문에서는 흙막이벽체와 기존구조물의 영향을 받고 있는 터널의 거동에 대하여 연구하였다. 1 : 10의 축척으로 2.0 m (폭)${\times}$6 m (높이)${\times}$4.0 m (길이)의 크기를 가진 대형토조에서 실험을 수행하였다. 그 결과 흙막이벽체 배면에 있는 인접터널의 안정성은 근접굴착에 의해 뚜렷하게 영향을 받는 것으로 나타냈다. If the ground is excavated in a depth which is deeper than the adjacent existing tunnel, the behavior of the braced wall is known to be greatly affected by the presence of the tunnel. By the way it is expected to be also affected by the structure on the ground surface, There are not many examples of studies which are conducted on this subject. As a result, largel scale model tests and analysis were conducted, to measure the behavior of the tunnel under the building whose location on the ground surface was varied during the adjacent ground excavation. For this purpose, the location of a building load was varied in 0 m, 1D, 2D on ground surface. In this paper, the behaviors of braced wall and adjacent tunnel was studied. Model tests in 1 : 10 scale were performed in real construction sequences. The size of test pit was $2.0m(width){\times}6.0m(height){\times}4.0m(length)$ in dimension. As a result, it was found that the stability of the existing tunnel under the influence of the building load on the ground surface adjacent to the braced wall.

高麗時代 寺址 出土 磁器의 器種과 性格 : 생산과 소비의 관점에서 Variety and the Characteristics

이종민 용인대학교 박물관 2004 丹豪文化硏究 Vol.- No.8

Since 1990s, the major achievement in Korean Archaelogical studies includes the excavations of temple sites, where a lot of ceramics has been dug up as their major specimens. The excavations from temple sites reflect the consumptive trend of the monks, the largest consumer group in the times when Buddhism was the dominant religion. Goryeo monks consisted of the social elites and cultural leaders in the hierachical society, so we can say their consumptive trend had a lot of influence on making of the celadon porcelain. It can be summarized briefly according to the data from excavations: porcelain excavations from temple sites can be categorised in celadon, white porcelain, and imported porcelain; historic temples seemed to have consumed common items from the early Goryeo to later times. Among these items, Korean celadons were found in the form of bowl and tea vessels even in the earliest stage. In the Middle Goryeo Dynasty, various everyday vessels appeared in place of bowl and tea vessels; and in later Goryeo celadon items were simplified, usually in the forms of food vessels. Celadons were circulated nationwide if they were in high quality, but if they were in low quality, they came from the kiln near the temples. Compared to this, white porcelain was found in the temples near the workshops, which signified the consumptive pattern different from the ones of the high quality celadon. The import porcelain such as Yaozhouyao-type(燿州窯系 celadon(靑磁), Dingyao-type(定窯系) white porcelain(白磁), Jingdezhenyao-type(景德鎭窯系) qingbaiporcelain(靑白磁, porcelain with bluish-white glaze), Jianyao-type(建窯系) tenmoku(天目, stoneware with black-glaze), Jizhouyao-type(吉州窯系) tenmoku(天目) were found as many as the high quality celadon in proportion and numbers, which was related to the conditions for domestic porcelain production. Especially the celadons with molded design and hard white porcelains in good quality, and black glazed tea bowls were the major imports, which could not be produced found in Goryeo dynasty (高麗) Porcelains from the temple sites consistently corresponded to the products from kilns in each age. This implies most of the kiln products were consumed in temples. As time passed by, the items changed in types, and this might be because the new forms of porcelain from China accelerated the change. Also it was partly due to the gradual change in social institutions. It is not certain how much the temples have contributed to the change, but it is for certain that since the active majority who accepted the new culture of ceramics gathered around the temples. thus playing an important role the change of the types in Goryeo celadon.

국내 중소기업 전자상거래 현황 및 활성화 방안에 관한 연구

이종민,Lee, Jong-Min 한국산학경영학회 2005 산학경영연구 Vol.18 No.1

전자상거래가 경제활동의 새로운 장으로 부각됨에 따라 이의 활용이 기업의 중요한 현안으로 등장하였다. 이에 따라 본 연구는 취약한 국내 중소기업의 전자상거래 활성화 방안 마련을 목적으로 현재 중소기업의 정보화 수준, e-비즈니스 활용 실태를 조사하였다. 조사결과 국내 중소기업의 PC, 인터넷 보급 등 기본적인 인프라는 만족한 수준이지만, 이들은 주로 사무자동화와 같은 기초적인 정보화 활용 수준에 그치고 있었다. 전자상거래 시스템 도입 등 본격적인 정보시스템 활용이 부진한 이유로는 중소기업의 정보화 인력, 기술, 자금 부족이 가장 큰 문제로 지적되었다. 이러한 상황을 고려할때 패키지 소프트웨어나 웹 호스팅 서비스의 보급에 의한 정보화 지원이 가장 적절할 것으로 판단되며, 정책적인 차원에서의 웹 기반 ASP(Application Service Provider)의 개발 및 보급과 자금지원, 교육, 자문을 구체적 방안으로 제시하였다. 또한 정보화 투자대비 효익에 대한 기업의 우려에 대해 우수사례 발굴과 홍보, BSC(Balanced Scorecard)를 통한 경영성과 측정지표의 개발이 필요하며, 이를 기반으로 효율성이 높은 분야에 대한 집중적 지원이 요구된다. This study attempts to investigate the IT utilization and e-business level of the small and medium companies in order to facilitate their e-commerce efforts. Results show that they have basic IT infrastructures such as internet and PC, but they use their IT resources mainly for office automations. Major problems with such low level of IT utilization are in their lack of manpower, skill, and fund. Considering above issues, web hosting service is believed as a good measure to alleviate their problems. Hence, this paper suggests that utilization of the web-based ASP can be a viable solution for the currently revealed issues. Also, development of creative IT application(business) cases and their advertizement can lead small and medium finns to more productive IT investments, which requires more diverse IT performance measurements such as BSC(balanced scorecard), other than traditional ROI.

종말유도를 위한 발전형 적외선 탐색기

이종민,Lee, Jong-Min 한국방위산업진흥회 1985 國防과 技術 Vol.- No.71