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.

의·한의 협진 의료이용 행태 분석 연구

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.

유리 기판에서 RF 마그네트론 스퍼터링법으로 증착한 비정질 투명전극 스트론튬 루세네이트 박막 두께에 따른 광학 및 전기적 특성

방효진(Hyo Jin Bang),김현민(Hyun Min Kim),이종훈(Jong Hoon Lee),안지훈(Ji-Hoon Ahn),김홍승(Hong Seung Kim) 한국물리학회 2022 새물리 Vol.72 No.10

스트론튬 루세네이트 (SrRuO₃)의 전극은 페로브스케이트 구조 유전체의 유전 특성을 향상시킬 수 있어 DRAM(Dynamic Random-Access Memory) 에 가장 적합한 전극 재료로 사용되고 있다. 이러한 장점들을 가지고 있는 스트론튬 루세네이트 (SrRuO₃) 박막이 투명 전극(Transparent Conductive Oxide; TCO) 으로의 사용 가능성을 확인해 보기 위해 연구하였다. 본 연구에서, 스트론튬 루세네이트(SrRuO₃) 박막을 유리 기판 위에 RF 마그네트론 스퍼터링 법으로 상온에서 증착 하였다. 박막의 두께에 따른 광학적 특성과 전기적 특성을 관찰하기 위하여 증착 시간을 5분과 50분으로 설정하여 실험을 진행하였다. 증착 시간이 증가할수록 박막 두께가 5nm에서 68nm로 증가하였고 광 투과율이 80%에서 40%로 감소하였다. 전기적 특성인 비저항은 박막 두께가 증가 하면서 1.99 mΩ·cm 에서 26.3 mΩ·cm 로 증가하였다. 결과적으로, 스트론튬 루세네이트(SrRuO₃) 박막을 유리 기판 위에 5분 증착 하였을 때, 약 80%이상의 투과율과 4.57eV의 밴드 갭, 그리고 1.99 mΩ·cm의 비저항을 보여주었다. The SrRuO₃ electrode can improve the dielectric properties of the perovskite structure. Thus, it is the most suitable electrode material for Dynamic Random-Access Memory (DRAM). This study was conducted to investigate the possibility of the SrRuO₃ thin film as a transparent conductive oxide (TCO). In this study, an SrRuO₃ thin film was deposited on the glass substrates by the RF magnetron sputtering method at room temperature. To observe the difference in optical and electrical properties as per the thin film thickness, the deposition times were set to 5 and 50 min. As the deposition time increased, the film thickness increased from 5 to 68 nm, the optical transmittance decreased from 80% to 40%, and the resistivity (an electrical property) increased from 1.99 to 26.3 mΩ·cm. Consequently, when the SrRuO₃ thin films were deposited on the glass substrates for 5 min, a transmittance of about 80% or more, a band gap of 4.57 eV, and a resistivity of 1.99 mΩ·cm were observed, thus verifying that an SrRuO₃ electrode can improve the dielectric properties of perovskite.

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.

고승압비를 갖는 개선된 인터리브드 부스트 컨버터에 관한 연구

김현민(Hyun Min Kim),유지윤(Ji Yoon Yoo) 대한전기학회 2015 대한전기학회 학술대회 논문집 Vol.2015 No.10

제어봉구동장치의 동작 시뮬레이션

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.

스마트폰 곡면유리 성형시스템의 가압장치 설계 및 곡면유리 성형특성실험

김현민(Hyeon-Min Kim),홍태경(Tae-Kyung Hong),정동연(Dong-Yean Jung),이연형(Yeon-Hyeong Lee),박재현(Jea-Hyun Park),김갑순(Gab-Soon Kim) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.5

This paper describes the design of a force applying system for a smart phone curved glass molding system and its characteristic test. The force applying system is composed of a motor and gear, a rectilinear movement structure, a force sensor, an LVDT (Linear Variable Differential Transformer) sensor, an up and down moving block, and so on. The system precisely controls the applying force and time to the plane glass because the glass can be easily destroyed under applied force, and can be bent imperfectly. As a result of the characteristic test, the curved glass can be manufactured using this system, and the holding time under 0N force, the applying force to the plane glass, the time for applying from 0N to maximum force, and the holding time under maximum force at the manufacture feasible temperature 620℃ were found.

고전압 펄스를 이용한 선박 방오 시스템

김현민(Hyun-Min Kim),이승환(Seung-Hwan Lee),김희제(Hee-Je Kim) 전력전자학회 2012 전력전자학술대회 논문집 Vol.2012 No.11

보험영업사원의 고객관계형성에 대한 다중 매개효과 분석 - 비즈니스 및 사회적 관계형성을 중심으로 -

김현민 ( Hyun Min Kim ),박찬욱 ( Chan Wook Park ),정선호 ( Sunho Jung ) 한국보험학회 2019 保險學會誌 Vol.120 No.-

본 연구는 보험영업사원(이하 영업사원)의 고객관계형성에 대한 다중매개 효과를 분석한다. 이를 위하여 고객관계형성 행동 중 소통 행동과 공감대형성 행동이 고객만족에 미치는 영향관계에 대한 비즈니스 관계형성과 사회적 관계형성을 중심으로 분석하였다. 매개효과는 Hayes의 SPSS Process V3.1을 사용하였다. 연구결과 소통 행동과 공감대형성 행동이 고객만족에 미치는 영향관계는 비즈니스 관계형성과 사회적 관계형성이 동시에 매개하는 것으로 확인되었다. 또한 소통행동과 공감대형성 행동이 고객만족에 미치는 영향관계는 사회적 관계형성, 비즈니스 관계형성의 순으로 직렬 매개하는 것으로 확인되었다. 이론적 시사점으로는 영업사원들의 고객만족을 위한 비즈니스 관계형성 활동에 사회적 관계형성이 선행요인으로 작용한다는 것을 순차적 직렬 매개효과 검증을 통하여 실증적으로 확인하였다. 실무적 시사점으로는 보험영업사원이 고객과의 장기적인 관계에서 성과창출을 위하여 사회적 관계형성 활동과 함께 비즈니스 관계형성 활동에도 노력하여야 한다는 것이다. This study analyzes the effect of multiple salespeople on the customer relationship building. For this purpose, the Commission analyzed the business and social relationship building for the influence of information-communication behavior and common grounding behavior on customer satisfaction during the customer relationship building. The SPSS Process V3.1 of Hayes was used to check the parameter effects. Research has shown that the impact of information-communication behavior and common grounding behavior on customer satisfaction is mediated by both business relationship building and social relationship building. It was also confirmed that the effects of information-communication behavior and common grounding behavior on customer satisfaction were multi and sequential mediated in series in the order of social and business relationship building. Theoretical implication is empirically verified through sequential mediation effect that social relationship building activities as a prerequisite for business relationship building activities for customer satisfaction. The practical implication is that insurance salespeople should also strive for business relationship building activities along with social relationship building activities to generate performance in their long-term relationships with customers.

Train Signature를 이용한 열차하중의 동적하중효과 비교

김현민(Kim Hyun-Min),오지택(Oh Ji-Taek),황원섭(Hwang Won-Sub) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-

In order to compare the dynamic loading effects of particular trains it is necessary to use methodology that separates the two inherent aspects of the dynamic response of the total dynamic system-the characteristics of the train and a bridge. Because the train signature profile is a function of axle spacing and axle loads, it can be calculated which is independent of the characteristics of an individual bridge. Thus the use of the train signature enables a rapid comparison of the effects of different trains to be made. If the magnitude of train signature for a new train type is less than of existing trains on a route then the route will be satisfactory for the new train. This study presents a quantitative analysis of the dynamic loading effects for various domestic real trains-PMC8, PMC16, Mugunhwa passenger coach, several freight coach, KTX and TTX(Tilting Train Express)- Using the train signature.