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치근단 감염 치아의 치근단 수술 후 예후에 관한 후향적 연구
김현민,박철휘,이상칠,김동우,박대송,정진환,이슬기,송민석,Kim, Hyeon-Min,Park, Chul-Hwi,Lee, Sang-Chil,Kim, Dong-Woo,Park, Dae-Song,Jung, Jin-Hwan,Lee, Seul-Ki,Song, Min-Seok 대한악안면성형재건외과학회 2010 Maxillofacial Plastic Reconstructive Surgery Vol.32 No.3
Purpose: The purpose of this retrospective clinical study was to monitor the outcomes of periapical surgery in periapically infected tooth with or without retrograde filling materials (MTA or IRM). Patients and Methods: A total of 85 teeth in 63 patients were included in the study between November 2004 and August 2008. Randomly, MTA or IRM was used as a retrograde filling material or only apical resection without retrograde filling. Teeth with advanced periodontal bone loss or presence of root fracture were excluded from the study. The patients were subjected to a minimum follow-up period of 12 months, with a mean of 17.1 months. Results: Successful healing was observed in 83.3% of the MTA-treated teeth, 80% of the IRM-treated teeth and 75% of the teeth which was not retrograde filling. Doubtful healing was seen 9.3% (MTA), 13.3% (IRM), 12.5% (no retro-filling). The success rate of upper incisors (92%) was higher than lower lincisor and molars (66.7% and 50%, respectively). Conclusion: In this study, periapical surgery including retrograde filling improves the prognosis. And, no statistically significant differences were found between retrograde filling materials (MTA or IRM).
회전요동하는 원통내의 유동 및 교반특성을 위한 수치해석적 연구
김현민,서용권,Kim, Hyeun Mihn,Suh, Yong Kweon 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.3
Incompressible flow inside a circular cylinder Including periodically oscillating free surface waves was studied primarily by using a numerical method. We developed a finite difference scheme based on the MAC method applicable to three-dimensional free-surface flows, and applied it to the present flow model to study tho flow characteristics as well as the fluid stirring. To verify the validity of our scheme, we performed a simple experiment for flow visualization. We found that the numerical results show a reasonable agreement with the observed flow patterns.
우연히 발견된 장간막의 단중심성 형질세포형 Castleman병 1예: 초음파와 CT 소견 중심으로
김현민,김봉수,정인호,현창림,정승욱,조재민,Kim, Hyun Min,Kim, Bong Soo,Jung, In Ho,Hyun, Chang Lim,Jung, Seung Wook,Jo, Jae Min 제주대학교 의과학연구소 2018 The Journal of Medicine and Life Science Vol.15 No.1
Castleman's disease is a benign lympho-proliferative disorder that commonly occurs in mediastinum. It is known that the disease rarely occurs in mesentery. Most localized abdominal Castleman's diseases are histologically hyaline vascular type. The contrast-enhanced CT in patient with hyaline vascular type Castleman's disease shows a well-defined mass with homogenously intense enhancement. On the other hand, the patient with plasma cell variant has systemic symptoms, but not specific imaging features. We report a unicentric plasma cell variant Castleman's disease in mesentery nearby superior mesenteric artery as presenting a single mass, not accompanied by systemic symptoms with similar characteristics to hyaline vascular type.
김현민,김남권,남순호,이혜윤,Kim, Hyun-Min,Kim, Nam-Kwen,Nam, Soon-Hoo,Lee, Hye-Yoon 대한예방한의학회 2018 대한예방한의학회지 Vol.22 No.2
Objectives : This study was conducted to investigate the frequent diseases among the people who had been treated by collaborative treatment of Korean medicine and Western medicine, and to compare their medical use behaviors before and after the collaborative first-stage pilot project between Korean medicine and Western medicine. Methods : 4,467 patients were identified as the patients who are participated in the collaborative first-stage pilot project between Korean medicine and Western medicine during the period between July 15, 2016 and March 31 2017. We used 28,480 records of Korean national health insurance claim data from January 1 2016 to March 31 2017 to analyzed present condition of cooperative medical usage. Also we conducted a paired t test to compare the percentage of collaborative treatment days before and after the pilot project period. Results : We found that the most frequent diseases treated in the pilot project were the diseases of musculoskeletal and nervous system and then 10 major diseases such as H, K, J, C (D), N, L, E, A, H and F disease codes in order. Also it was confirmed that 14 major and 53 medium diseases are included from more than 90% of total patients. As a result of high frequency of medical treatment in Western medicine or Korean medicine is "administration of Korean medicine", which is same as before and within the pilot project. The ratio of utilizing both Western and Korean medical care for the same disease on the same day by both general patients and patients in KCD-7 disease code group C, G, I, M and S had been increased significantly. Conclusions : The pilot project might change the behavior of utilizing the medical care service by increasing the ratio of collaborative treatment of Western medicine and Korean medicine for the same disease on the same day.
김현민(Kim Hyun Min),김성일(Kim Sung Il),김태훈(Kim Tae Hoon) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
This paper is intended as an development and application of RWIM(Railroad Weigh In Motion) system. The concern with monitoring technology of moving loads has been growing. Over the past few years, several studies have been made on WIM system in the road research field. But very few attempts have been made at such research. in the railroad filed, From the maintenance view point, the monitoring of moving train loads is important. RWIM system developed in this study consists of sensor zig, power unit, controller. This system is characterized by automation, low energy consuming, a long time using. Additional research was undertaken to verify the findings. Data were gathered 797 trains in the conventional lines.
보간 및 PID 제어를 지원하는 임베디드 모션제어기의 설계에 관한 연구
김현민(Hyun-Min Kim),김영준(Young-Jun Kim),김태원(Tae-Won Kim),신진호(Jin-Ho Shin),김원호(Won-Ho Kim) 한국정보기술학회 2010 Proceedings of KIIT Conference Vol.2010 No.-
본 논문에서는 보간 및 PID 제어를 지원하는 DSP 기반 임베디드형 모션제어기의 설계에 대하여 연구한다. 모션제어기의 개발을 위해 LSPB 모션 프로파일 생성 알고리즘과 보간 알고리즘을 개발하고, 제어기의 잡음과 기계적 공진을 제거하기 위한 저역통과필터와 노치필터가 내장된 PID 제어기를 설계한다. In this paper, we study on design of an embedded motion controller supporting the interpolation functions and PID control. For this motion controller, LSPB motion profile generation algorithm and interpolation algorithm are developed. In addition, a PID controller including a Low-Pass Filter(LPF) and a notch filer for removal of the noise and mechanical resonance is designed.
김현민(Hyun Min KIM),김인용(In Yong KIM),김일곤(Il Kon KIM) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The magnetic jack type Control Element Drive Mechanism (CEDM) had been developed and verified through electromechanical testing including the testing of the magnetic force required to lift the control element assembly. It would become inefficient in view of cost and time for parametric studies to be performed by test to improve the CEDM system. So it becomes necessary to develop a computational model to simulate the electromagnetic characteristics of the CEDM in order to improve the CEDM design efficiently. In this paper it is presented that the electromagnetic analysis using a 2D axisymmetric FEM model has been carried out to simulate the operation of the latch magnet of the CEDM to generate a current trace for latch coil. The results show the calculated current trace is very similar to the real current trace taken from the CEDM.