진단적 후두근전도

정성민,Chung, Sung-Min 대한후두음성언어의학회 2008 대한후두음성언어의학회지 Vol.19 No.2

Diagnostic laryngeal electromyography (LEMG) relatively evaluates the electrophysiologic status of the larynx and provides critical clinical informations that no other tests can provide. However, LEMG is still not widely applied as a routine tool in clinical practice. One reason for this is the technical and interpretative difficulties of LEMG. But if LEMG is performed by a team approach consisting of an otolaryngologist and a neurologist, the technique and the interpretation of LEMG are not difficult to master. Another reason is that there is still not exact standard guideline for clinical application of LEMG. LEMG is an essential diagnostic test in evaluating patients with neuromuscular disorders, particulary vocal fold immobility, reduced mobility of vocal fold. The more we have used LEMG, the more we have found it useful in the evaluation and treatment of voice disorders, and the role of LEMG will be extended.

후두 근전도

정성민,Chung, Sung-Min 대한후두음성언어의학회 2006 대한후두음성언어의학회지 Vol.17 No.1

치조제의 유지와 수복

정성민,Chung, Sung-Min 대한심미치과학회 1998 Journal of the Korean Academy of Esthetic Dentistr Vol.7 No.1

Alveolar ridge augmentation and preservation techniques designed to reconstruct deformed alveolar ridge now occupy a major role in esthetic dentistry. Previously, deformed alveolar ridges were filled with plastic materials(porcelain or resin) of prosthesis to restore ridge contours, which resulted in larger teeth and food impaction under the pontic base. So, prostheses of this type were unacceptable and really detectable when patients smiled. But nowadays, alveolar ridge augmentation procedures enable the dentists to provide patients with fixed prostheses that are esthetic. The development of guided tissue regeneration technique and materials also have made a major impact on extending the scope of therapeutic horizons in dentistry.

후두학의 역사

정성민,Chung, Sung-Min 대한후두음성언어의학회 2012 대한후두음성언어의학회지 Vol.23 No.1

An understanding of the history of laryngology is both interesting and useful for those in the field so this study attempts to uncover some of the interesting aspects of its history. The oldest reference of laryngology in the Orient is in the medical documents called the "Whangjainaekyung",(황제내경) which was written over a time period between 3000-4000 B.C., and described the laryngeal function of respiration, protection of the airway and phonation. In the West, a drawing that seems to portray a tracheostomy was found in medical tombs in the plains of Saqqara in Egypt. These drawings date from approximately 3600 B.C. A watershed in laryngology occurred when a spanish music professor named Manuel Garcia in first successfully used a mirror to inspect the larynx. Since that time, laryngology has developed relatively quickly and clinical laryngology made it possible by means of a number of favorable developments. Great advances in laryngological diagnosis and treatment has occurred since the 1970s thanks to improvements in technology leading to the introduction of an operating microscope, endoscopes and lasers. Despite our recent advances in laryngology, we still have not achieved uniformly favorable outcomes and there is much that we do not know. Our future promises continued advances in the field of laryngology such as gene therapy to improve wound healing and tissue engineering to allow the recreation of normal mucosa. In this review, I divide the history of the larynx into the past, present and future. In the last section, I described the history of laryngology in Korea briefly.

탈회동결건조골에 혼합한 형질 변형 성장인자($TGF-{\beta}1$)가 골조직 재생에 미치는 영향

정성민,이만섭,박준봉,Chung, Sung-Min,Lee, Man-Sup,Park, Joon-Bong 대한치주과학회 1995 Journal of Periodontal & Implant Science Vol.25 No.2

The purpose of this study was to observe the effect of $TGF-{\beta}1$ on the regeneration of bone in guided bone regeneration. Four adult dogs aged 12 to 24 months were used in this study. Experimental bone defects were created surgically with surgical bur and chisel on the 3th. premolars. In experimental group, bone defect were grafted with DFDB and $TGF-{\beta}1$. In control groups, bone defects were grafted with only DFDB. At 1,2,3 and 4 weeks, dogs were serially sacrificed and specimens were prepared with Hematoxylin-Eosin stain and Goldner's stain for light microsopic evaluation. The results of this study were as follows: 1. The infiltration of inflammatory cells was prominent in control groups at 1, 2 and 3 weeks. 2. The lining of osteoblast was observed at 2 weeks in control group, but at 1 week in experimental group. 3. In both groups, osteoid was formed at 2 weeks. In control groups, osteoid was fromed on only bone surface. but in experimental groups, osteoid were formed on both bone & DFDB surfaces. 4. In only experimental groups, The fusion of new bone & DFDB was only observed at 3 weeks. and the fusion of new bone & DFDG was more prominent at 4 weeks. But in control groups, No fusion of new bone& DFDB was oberved at 3 and 4weeks. From the above result, the $TGF-{\beta}1$ was effective in bone formation and increased inductive effect of DFDB in guided bone regeneration technique. Inductive effect of DFDB was increased with $TGF-{\beta}1$.

신뢰성 있는 데이터의 전달을 위한 지역적 클러스터 헤드 교체 기법

정성민 ( Sung-min Jung ),한영주 ( Young-ju Han ),정태명 ( Tai-myoung Chung ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2

센서 네트워크는 각종 정보를 수집할 수 있는 센서 디바이스를 이용해 원하는 정보를 수집하고 전달하는 일종의 애드혹(Ad-Hoc) 네트워크이다. 센서 디바이스의 한계점에 의해 기존의 애드혹 네트워크상의 라우팅 기법을 그대로 적용하기 적합하지가 않기 때문에 센서 디바이스의 특성에 맞는 여러 라우팅 기법들이 제안되고 있다. 제안된 여러 기법 중에 LEACH(Low Energy Adaptive Clustering Hierarchy) 라우팅 기법은 클러스터 헤드의 선출시에 각 노드의 에너지에 대한 고려가 전혀 없기 때문에 클러스터의 클러스터 헤드가 에너지가 고갈되었을 때 헤드의 역할을 수행하기 어려워 신뢰적인 데이터의 전송에 문제를 가져오게 된다. 본 논문에서는 LEACH 라우팅 기법에서 신뢰적인 데이터 전송을 위해 지역적 클러스터 헤드의 교체 기법을 이용한 라우팅 기법을 제안한다. 지역적 클러스터 헤드 교체를 이용하게 되면 클러스터 헤드의 에너지 고갈시에 이웃의 다른 노드가 그 클러스터 헤드의 역할을 대신 수행함으로써 기존의 LEACH 라우팅 기법에서 발생할 수 있는 신뢰적인 데이터 전송의 문제를 해결하게 된다.

IP 기반 센서 네트워크에서 이동성 지원에 관한 연구

정성민 ( Sung-min Jung ),김태경 ( Tae-kyung Kim ),정태명 ( Tai-myoung Chung ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1

IP 기반의 센서 네트워크인 6LoWPAN 은 IEEE 802.15.4 표준에 IPv6 를 적용하기 위해 제안되었다. 현재 IPv6 상에서 노드의 이동성을 지원하기 위한 기술로 MIPv6 와 PMIPv6 가 표준화 되었다. 6LoWPAN 에서 이동성을 지원하기 위해서 PMIPv6 를 적용하는 것이 MIPv6 를 적용하는 것보다 더 효율적이다. PMIPv6 기술의 특징은 기존의 MIPv6 에 비해 노드가 바인딩 메시지를 처리하지 않는 점이다. 따라서 노드의 부하를 줄일 수 있기 때문에 6LoWPAN 에 적합하다. 하지만 6LoWPAN 노드의 하드웨어적인 제약 사항을 고려해 볼 때, 기존의 PMIPv6 를 그대로 적용하기에는 무리가 있다. 그대로 적용한다면 PMIPv6 은 원 홉에 기반하고 있기 때문에 멀티 홉에 기반한 6LoWPAN 에는 적합하지 않다. 또한 기존에 정의되어 있는 RS 나 RA 메시지의 크기로 인해 멀티홉 경로상의 각 단말에 많은 부하를 줄 수 있다. 본 논문에서는 위의 문제점을 해결하기 위해 6LoWPAN 에 적합한 RS 와 RA 메시지를 제안한다.

이기종 센서 네트워크의 수명에 관한 연구

정성민 ( Sung-min Jung ),김태경 ( Tae-kyung Kim ),정태명 ( Tai-myoung Chung ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.1

센서 네트워크는 센싱 기능과 데이터 처리 그리고 무선 통신기능을 갖춘 많은 노드로 이루어져 있다. 센서 노드는 제한적인 CPU, 배터리 그리고 저장공간과 같은 제약사항을 가지고 있기 때문에 시간이 지날수록 노드의 수명이 다해 전체적인 네트워크의 성능은 감소하게 된다. 본 논문에서는 이기종 센서 네트워크에서 노드 개수에 따른 작업 수행 시간의 분석을 통해 센서 네트워크의 수명을 판단한다. 성능 평가 결과 계층 기반의 라우팅 기법의 경우 클러스터 수의 비율이 네트워크의 수명에 큰 영향을 주는 것을 알 수 있다.

국내 육성 양조용 품종 및 주요 양조용 품종의 수형별 발아 및 착과 특성

정성민(Sung Min Jung),임동준(Dong Jun Im),허윤영(Youn Young Hur),김현일(Hyun Il Kim),정경호(Kyeong Ho Chung) 한국원예학회 2018 한국원예학회 학술발표요지 Vol.2018 No.10

Hemorrhage 환자에 있어서 Dual-Energy Computed Tomography를 이용한 Head Angiography 검사의 유용성

정성민(Sung Min Chung),김혜진(Hye Jin Kim) 대한CT영상기술학회 2010 대한CT영상기술학회지 Vol.12 No.2

Purpose To estimate the availability of dual energy computed tomography(DECT) for the patients who had been underwent head angiography because of bleeding with the image(virtual non-contrast, VNC, 50% mixed image, overlay view) that was obtained by readjusting of iodine concentration at dual-energy processing and volume rendering image. Materials and methods The subjects were 40 patients who had hemorrhage or were suspected to have hemorrhage and took head angiography with DECT in our hospital from April 2009 to January 2010. The method was that we implemented the monitoring scan and set the interest area at aortic arch and made the scanning to be started automatically when Hounsfield unit reached to 100 using by auto bolus triggering. 60 ml of contrast medium was injected at the speed of 4 ml/sec and another 60 ml was injected at the speed of 2.5 ml/sec and 30 ml of saline was added at the speed of 2.5 cc/sec. The estimation was done with computed tomographic angiography(CTA) volume rendering images took from 3D reconstruction process and 2D mapping images(VNC 50% mixed image) took from dual console. Results We had 9 patients of Vascular lesion which was 25.5%, 16 patients of tumor lesion which was 40%, 8 patients of simple hemorrhage which was 20%, 4 patients who didn’t have hemorrhage which was 10%, 2 patients of tauma which was 5%, and 1 patient of hemorrhage caused by uncertain reason which was 2.5%. Conclusion It was concluded that the estimating the reason of hemorrhage using by both volume rendering image in bead angiography by dual energy and 2D mappiing image acquired through dual console can be an useful diagnosis to choose additional examinations and make a decision the direction of the treatment.