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마이크로웨이브 응용을 위한 솔-젤법으로 제작한 K(Ta<sub>0.6</sub>Nb<sub>0.4</sub>)O<sub>3</sub> 박막의 유전 특성
권민수,이성갑,김경민,이삼행,김영곤,Kwon, Min-Su,Lee, Sung-Gap,Kim, Kyeong-Min,Lee, Sam-Haeng,Kim, Young-Gon 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.6
In this study, double layer KTN/STO thin films were fabricated on $Pt/Ti/SiO_2/Si$ substrate, their structural and electrical properties were measured according with the number of STO coatings, and their applicability to microwave materials was investigated. The average grain size was about 80~90 nm, the average thickness of the 6-coated KTN thin film was about 320 nm, and the average thickness of the STO thin film coated once was about 45~50 nm. The dielectric constant decreased with increasing frequency, and as the number of STO coatings increased, the rate of change of the dielectric constant with the applied electric field decreased. The tunability of the KTN thin film showed a maximum value of 19.8% at 3 V. The figure of merit of the KTN/1STO thin film was 9.8 at 3 V.
구개골에 발생한 악성 Peripheral Nerve Sheath Tumor의 증례보고
권민수(Min-Su Kwon),이현상(Hyun-Sang Lee),김현창(Hyun-Chang Kim),고승오(Seung-O Ko),신효근(Hyo-Keun Shin) 대한구강악안면외과학회 2004 대한구강악안면외과학회지 Vol.30 No.3
Summary: The malignant peripheral nerve sheath tumor(MPNST) is an aggressive neoplasm and can either arise independently or result from malignant change in preexisting neurofibromatosis (von Recklinghausen’s disease). Its histologic characteristics remain controversial, but currently it is believed that the schwann cell is the origin of the peripheral nerve sheath tumors. MPNST is an uncommon neoplasm of the head and neck region, and its presentation in the oral cavity is quite rare. In this study, we report a patient with a rare case of a MPNST involving the maxilla. A case report: A 29-year-old female presented with a chief complaint of painless swelling with bleeding tendency on the left maxillary tuberosity area 2 months ago. Clinical examination showed a 5.0×3.0 cm2 sized, indurative swelling on the site. Conventional radiographs showed a relatively well-defined soft tissue mass involving the left maxillary sinus, and destruction of the anterior, posterolateral walls of the left maxillary sinus. Subtotal maxillectomy and split-thickness skin graft from thigh were undertaken. In histochemical and immunohistochemical studies, the specimen revealed positive reactivities to Vimentin and S-100 protein. Final diagnosis was made as MPNST.
이차성 부갑상선 기능항진증과 동반된 갑상선내 부갑상선암 1예
권민수(Min Su Kwon),장항석(Hang Seok Chang),김호근(Ho guen Kim),정웅윤(Woong Youn Chung),임승길(Sung Kil Lim),박정수(Cheong Soo Park) 대한두경부종양학회 1999 대한두경부 종양학회지 Vol.15 No.2
Parathyroid carcinoma is rare, occurring in less than 2-3% of the patients with primary hyperparathyroidism. In the patients with chronic renal failure, the incidence is extremely low. Only 13 cases of parathyroid carcinoma with chronic renal failure have been described in the world literature. We report a case of parathyroid carcinoma in a 43-year-old man who has been suffered from chronic renal failure for 19 years. To our knowledge, this is the first case of parathyroid carcinoma occurring in the thyroid gland associated with secondary hyperparathyroidism.
SML을 사용한 소프트웨어 센서 이차전지핀 테스트베드 구성
권민수 ( Min-su Kwon ),강윤희 ( Yun-hee Kang ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.2
스마트팩토리 테스트베드 구축을 위해서는 생산 공정 및 제품 테스팅을 포함한 지속적 자료 수집 환경이 요구된다. 이 논문에서는 테스팅 환경의 장치 및 센서를 정의하기 위한 CDM(Common Device Model)을 기반으로 작성된 마크업언어인 SML(Sensor Markup Language)을 기술하고 이를 기반으로 구성된 소프트웨어 센서의 활용을 기술한다. 통지 모델을 기반으로 센서로부터 수집된 센싱자료와 상태 정보를 수집하기 위한 소프트웨어 아키텍처을 설계하였으며, 이는 테스트베드 시스템 개발의 참조모델로서 사용한다.
상악골 재위치술 시행 시 골편의 이동량에 따른 내측기준점의 변화 - 3차원 가상수술 프로그램을 이용한 연구
서영빈,박재우,권민수,Suh, Young-Bin,Park, Jae-Woo,Kwon, Min-Su 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.5
Purpose: Reposition of the maxilla is a common technique for correction of midfacial deformities. To achieve the goal of the surgery, the maxilla should be repositioned based on the precisely planned position during surgery. The internal reference points (IRPs) and the external reference points (ERPs) are usually used to determine vertical dimension of maxilla, which is an important factor for confirming maxillary position. However, the IRPs are known to be inaccurate in determining the vertical dimension. In this study, we investigated the correlation of positional change of the modified IRPs with repositioned maxilla. Methods: The study group consisted of 26 patients with dentofacial deformities. For the simulation of the surgery, patient maxillary CT data and 3-D virtual surgery programs (V-$Works^{(R)}$ and V-$Surgery^{(R)}$) were used. IRPs of this study were set on both the lateral wall of piriform aperture, inferior margin of both infraorbital foramen, and the labial surfaces of the canine and first molar. The distance from the point on lateral wall of the piriform aperture to the point on the buccal surface of the canine was defined as IRP-C, and the distance from the point on the inferior margin of the infraorbital foramen to the point on the buccal surface of the $1^{st}$ molar was defined as IRP-M. After the virtual simulation of Le Fort I osteotomy, the changes in IRP-C and IRP-M were compared with the maxillary movement. All measures were analyzed statistically. Results: With respect to vertical movements, the IRP-C (approximately 98%) and the IRP-M (approximately 96%) represented the movement of the canine and the $1^{st}$ molar. Regarding rotating movement, the IRPs changed according to the movement of the canine and the $1^{st}$ molar. In particular, the IRP-C was changed in accordance with the canine. Conclusion: IRPs could be good indicators for predicting vertical movements of the maxilla during surgery.
NTC 서미스터로 응용을 위한 Ni-Mn-Co 산화물의 미세구조와 전기적 특성
김경민,이성갑,권민수,김영곤,Kim, Kyeong-Min,Lee, Sung-Gap,Kwon, Min-Su,Kim, Young-Gon 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.6
In this paper, we investigated the effect of Co content on the microstructural and electrical properties of $Ni_{0.79}Mn_{2.21-x}Co_xO_4$ (x=0 to 0.25) specimens. Solid-state reaction was used to prepare the bulk specimens. XRD (X-ray diffraction) patterns showed that all compositions had a cubic spinel phase. As a result of the microstructural properties, FE-SEM(field-emission scanning electron microscopy) analysis showed a dense structure, and the mean grain size increased from $5.24{\mu}m$ to $7.33{\mu}m$ with an increase of Co content from x=0 to 0.25. All specimens exhibited the typical NTC thermistor characteristics as the electrical resistance exponentially decreased with increasing temperature. The resistivity and the B-value of $Ni_{0.79}Mn_{1.96}Co_{0.25}O_4$ were $2959{\Omega}{\cdot}cm$ and 3719, respectively.
Deformable Template과 GA를 이용한 얼굴 인식 및 아바타자동 생성
박태영(Tae-Young Park),권민수(Min-Su Kwon),강훈(Hoon Kang) 한국지능시스템학회 2005 한국지능시스템학회논문지 Vol.15 No.1
본 논문에서는 아바타를 자동으로 생성하기 위한 컬러 이미지 상에서의 얼굴, 눈, 입술 윤곽선 검출 기법을 제안하였다. 제안된 기법에서는 먼저 조명의 영향을 최대한 배제하기 위하여 HSI 색상 모델을 사용하였고 Ⅰ 정보를 제외한 HS 평면상에서 피부색을 정의하고 이를 이용하여 입력된 이미지로부터 피부 영역을 검출하였다. 그리고 변형가능 템플릿과 유전자 알고리즘을 이용하여 얼굴, 눈, 입의 윤곽선을 검출 하였다. 여기서 변형가능 템플릿은 B-spline 곡선과 컨트롤 포인트 벡터로 이루어지며, 이것은 다양한 얼굴, 눈, 입술 모양의 표현을 가능하게 한다. 또 유전자 알고리즘은 자연계의 진화와 선택원리를 응용한 매우 효율적인 탐색 알고리즘이다. 다음으로, 검출된 얼굴과 각 요소들의 윤곽선과 퍼지 C-평균 군집화를 이용하여 아바타를 생성하게 된다. 퍼지 C-평균 군집화는 얼굴색을 일정한 수로 단순화하는 과정에서 사용하였다. 결과적으로, 이와 같은 기법을 이용하여 기존의 정해진 이미지를 가지고 표현하던 아바타와는 달리 사용자의 특성을 표현할 수 있는 아바타를 자동으로 생성할 수 있다. This paper proposes the method to detect contours of a face, eyes and a mouth in a color image for making an avatar automatically. First, we use the HSI color model to exclude the effect of various light condition, and we find skin regions in an input image by using the skin color is defined on HS-plane. And then, we use deformable templates and Genetic Algorithm(GA) to detect contours of a face, eyes and a mouth. Deformable templates consist of B-spline curves and control point vectors. Those can represent various shape of a face, eyes and a mouth. And GA is very useful search procedure based on the mechanics of natural selection and natural genetics. Second, an avatar is created automatically by using contours and Fuzzy C-means clustering(FCM). FCM is used to reduce the number of face color. As a result, we could create avatars like handmade caricatures which can represent the user's identity, differing from ones generated by the existing methods.