신선암의 방사선학적 영상에 관한 고찰

추성이 대한영상의학회 1985 대한영상의학회지 Vol.21 No.3

Hypemephroma comprises about 85-90% of renal malignancy in adults. The natural course of hypemephroma is very diverse and unpredictable from abrupt explosive growth with wide spread metastasis to asymptomtic slow growth for several years. Reports from aliens indicated that hypernephroma with hisgopathological papillary growth pattern has better prognosis and more frequently hypovascular on renal angiography and less echogenic on ultrasonography than non-papillary hypernephroma. Reviewed here retrospectively all the patients who were admitted and diagnosed as hypemephroma histopathologically at the Severance Hospital from March, 1973 through september, 1984, in respective of angiographic vascularity, ultrasonographic echogenicity, histopathologic cell type and growth pattern, and following results were obtained. 1. The incidience of calcification in hypemephroma was 7 cases out of 53 cases (13%). The incidence of hypemephroma according to cell type was clear cell type 20 cases 56%), mixed cell type 11 cases (31%), granular cell type 4 cases (11%), sarcomatous cell type 1 case (2%). The incidence of hypemephroma according to growth pattern was papillary growth pattern 13 cases (45%) and non-papillary growth pattern 17 cases (55%). 2. Renal angiographically, hypervascular hypemephroma was 19 cases(73%), hypovascular hypemephromas was 6 cases (23%0, all of which showed abnomal marginal vessels. 3. Angiographically hypervascular hypemephroma had high incidence of predominantly high echogenicity and angiographically hypovascular hypemephroma had high incidence of predominantly low echogenicity. 4. Clear cell type hypemephroma had high incidence of predominantly low echogenicity on ultrasonography. 5. Predominantly low echogenic hypernephroma had high incidence of papillary growth pattern and predominantly high echogenic hypernephroma had high incidence of non-papillary growth pattern. In summary, clear cell type hypernephroma had high incidence of hypovasculari y angiographically and hypovascularity on angiography was correlated with predominantly low echogenicity on ultrasonography, and predominantly low echogenicity had high incidence of papillary hypernephroma which was reported to have more good prognosis than non-papillary hypernephroma. So, it can be suggested that if a hypernephroma show hypovascularity on angiography or predominantly low echogenicity on ultrasonography, it has a good prognosis than hypervascular or predominantly high echogenic hypernephroma.

An integrated MacheZehnder interferometric biosensor with a silicon oxynitride waveguide by plasma-enhanced chemical vapor deposition

추성중,김진식,이경운,이동호,신현준,박정호 한국물리학회 2014 Current Applied Physics Vol.14 No.7

We report the design and fabrication of an integrated MacheZehnder interferometric (MZI) biochip based on silicon oxynitride layers deposited with a plasma-enhanced chemical vapor deposition (PECVD) process. A rib waveguide for an integrated MZI sensor has been designed to have a high surface sensitivity and a single-mode behavior by using an effective index method. The integrated MZI chip operating at 637 nm is fabricated via conventional photolithography and reactive ion etching. As a biosensor application, the real-time and label-free detection of the covalent immobilization and hybridization of DNA strands is performed and verified with this device.

영재부모의 역량강화를 위한 액션러닝 적용방안

추성경 韓國英才學會 2013 영재교육연구 Vol.23 No.6

본 연구는 영재교육에 대한 관심은 해마다 높아지고 있는 반면에 영재부모를 대상으로 실제적인 문제해결을 할 수 있는 교육프로그램이 부족하다는 인식하에 영재부모의 역량강화를 위한 액션러닝의 적용방안을 모색해보고자 한다. 본 연구에서의 결론과 시사점은 다음과 같다. 첫째, 영재부모들은 가정에서 자녀양육에 관련된 고민과 스트레스를 경험하고 있으나, 영재를 직접적으로 양육하는 영재부모를 위한 교육은 미흡하므로 영재부모들을 대상으로 영재의 특성에 적합한 교육이 필요하다. 둘째, 영재부모에게 있어 역량강화는 부모가 능력을 가지는 것으로 자녀 양육에 대한 양육스트레스를 완화시키고, 부모들에게 자녀 양육에 실제적인 도움을 줄 수 있는 것으로 판단된다. 셋째, 영재부모의 역량강화를 위한 액션러닝의 적용방안은 영재 부모들이 함께 실제문제를 도출하고 해결방안을 모색함으로써 자녀양육에 대한 역량을 강화 시킬 수 있는 방안으로 제시될 수 있다. This study is purpose of empowerment of Parents of Gifted Children Using Action Learning. Conclusions and Implications of this study are as follows: First, the gifted children at home parents worry and stress associated with parenting experience, but directly to the nurturing gifted education is insufficient for parents. Thus, the characteristics of gifted and talented gifted parents who have appropriate training should be conducted. Second, a gifted parent empowerment by having a parent in child care for the ability to relieve stress and parenting, parents in the education of their children the confidence to believe that may be helpful. Third, parents of gifted children for strengthening the application of action learning approach is to derive a real problem with gifted children and their parents to seek a solution for the child care that can enhance the capabilities will be presented.

실험계획법을 이용한 다목적 차량의 측면하중 측정을 위한 3축 로드셀 개발

추성일(Sung-il Chu),박준협(Jun-hyub Park),이진근(Jin-gun Lee),박지영(Ji-young Park) 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.4

單元組織에의 斷想

秋誠求 서울大學校 師範大學 敎育會 1956 敎育 Vol.4 No.1

대규모 무선 센서 네트워크에서 계층적 데이터 전달 프로토콜

추성은,강대욱,Chu, Seong-Eun,Kang, Dae-Wook 한국정보통신학회 2008 한국정보통신학회논문지 Vol.12 No.8

대규모 무선 센서 네트워크에서 센서 노드들이 배치된 이후에는 에너지 충전이나 노드의 재배치가 매우 어렵고, 일부 센서 노드들의 에너지가 고갈될 경우 전체 네트워크의 분할로 이어진다. 이러한 제한된 조건하에서 효율적인 에너지 소비를 고려한 데이터 전달은 라우팅 프로토콜 설계의 핵심 요소이다. 본 논문에서는 다수의 소스 노드와 이동성 싱크 노드를 가진 무선 센서 네트워크 환경에서 에너지 효율성을 제공하는 계층적 데이터 전달프로토콜인 HDD (Hierarchical Data Dissemination)를 제안한다. 계층적 데이터 전달 프로토콜은 싱크 노드가 데이터 수집의 중심노드라는 점을 착안하여 싱크 노드 중심의 데이터 전달 경로를 구성하고, 이 경로가 이중계층(Two-Tier)통신을 통해 유지 되도록 한다. 실험을 통해 HDD 라우팅 프로토콜과 기존에 제안된 TIDD (Two-Tier Data Dissemination) 라우팅 프로토콜의 전체 소모된 에너지량, 데이터 전송 시간 및 데이터 전송 성공률을 비교 분석하였다. 그 결과 본 논문에서 제안하는 HDD 라우팅 프로토콜은 TIDD 보다 약 1.5배에서 3배정도의 에너지 절감 효과를 확인할 수 있었다. In large-scale wireless sensor networks, the deployed nodes cannot be replaced or recharged after first deployment. Also, dead nodes maγ lead to the partition of whole networks. While performing data dissemination under a battery power constraint, energy efficiency is a key design factor of routing protocol. As a solution for the efficient data dissemination, in this paper, we propose a protocol namely Hierarchical Data Dissemination (HDD) which provides scalable and efficient data delivery to multiple sources and mobile sinks. HDD uses the facts that sink nodes are central gathering Points and source-centric data forwarding paths are constructed and it is maintained with two-tier communications. The performance of HDD is compared with TTDD about the energy consumption, data delivery time and data success ration. The extensive simulation results show that HDD Routing Protocol outperforms TIDD by more than $1.5{\sim}3times$ on energy consumption.

An Integrated Mach-Zehnder Interferometric Sensor Fabricated by Using Cr Mask Extension Lithography

추성중,박정호,이상엽,신현준 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.5

An integrated Mach-Zehnder interferometric chip operating at 632.8 nm was designed and fabricated using planar rib waveguide technology for optical sensor applications. A rib waveguide with a silicon-oxynitride core layer and silicon-oxide clad layers was geometrically designed to have a singlemode operation and a high surface sensitivity by using an effective index method. A chromium mask layer was employed as an etch stop to protect the core layer of the rib waveguide and was patterned using an image reversal process with a photo mask applied to the sensor zone. The image reversal process was modified in order to obtain a longer chromium mask layer against the sensor zone. We have, therefore, established a fabrication method for an integrated Mach-Zehnder interferometric sensor without the addition of a new photo mask. The optical measurement with this device for a mixture of deionized water (DIW) and phosphate buffer solution (PBS) finally showed a sensitivity of about π/(6.25 × 10^(-4))

Fine Pitch 웨이퍼 프루빙 시스템의 마이크로 팁의 형태 및 최적 재질 연구

추성원(S. W. Choo),남경태(K. T. Nam),강태호(T. H. Kang),박경용(K. Y. Park) Korean Society for Precision Engineering 2019 한국정밀공학회 학술발표대회 논문집 Vol.2019 No.10월

제어기 성능에 따른 로봇 모션 제어 성능 비교

추성원(S.W. Choo),남경태(K. T. Nam),이승준(S. J. Lee),이광희(K. H. Lee),신은철(E. C. Shin) 한국정밀공학회 2016 한국정밀공학회 학술발표대회 논문집 Vol.2016 No.5월

Dosimetry for Total Skin Electron Beam Therapy in Skin Cancer

추성실(Sung Sil Chu),노준규(John JK Loh),김귀언(Gwi Eon Kim) 대한방사선종양학회 1992 Radiation Oncology Journal Vol.10 No.1

4-5MeV의 전자선은 피부표면의 흡수선량을 증가시키고 표면하 10mm 내외에서 급속히 감소함으로 Mycosis fungoides, Kaposi's sarcoma등 전신피부암에 대한 가장 적당한 치료방사선으로 알려져왔다. 그러나 평면이 아니고 굴곡이 심한 인체표면에 균일한 선량을 계획하기는 많은 어려움이 있었다. 연세암센터에서는 1980년부터 시행하여왔던 6MeV 전자선의 마름모형, 네방향 조사방법을 개량하고 많은 문헌을 참고하여 상하 양방향의 조사면과 환자위치를 각각 여섯가지 자세로 나누어 조사(Six-Dual-Field)하는 방법을 사용하였으며 이에따른 전신피부표면의 선량과 선량분포를 측정하였다. 선형가속기에서 발생되는 6MeV 전자선을 0.5cm 두께의 아크릴판으로 감약시키고 콜리메터가 완전히 열린 조사면을 상하 19°씩 옮기므로서 타켓트에서 3m 거리에 약 2m×1m의 균일한선량의 조사면(평탄도 +3%)과 10mm 내외의 실효깊이(80% 선량지점) 및 산란선에 의한 피부표면선량을 증가시킬 수 있었다. 환자는 일부피부가 가려지지않도록 팔과 다리를 적당한 자세로 고정시키고 전자선을 여섯방향에서 각각 2회씩 상하로 조사시키므로서 피부표면에 균일한 선량분표(표준편차 5%)가 가능하였으며 80%의 심부률이 8~10mm에서 측정되었다. 모든 측정은 인체등가팬텀과 폴리스틸렌팬텀을 사용하였으며 필름, 평형전리측정기 및 표준전리측정기를 이용하였다. 특히 환자피부표면의 흡수선량분포를 확인하기 위하여 열형광측정기와 반도체측정기를 이용하였으며 6~20개의 소형 측정기를 환자 피부표면에 부착시킨후 전자선 치료과정 동안 피폭 시켜 측정하였고 그결과 차폐된 부위를 제외하고 평균 10%이내의 균일한 선량분포를 얻을 수 있었다. Increasing frequency of skin cancer, mycosis fungoides, kaposi's sarcoma etc, it need to treatment dose planning for total skin electron beam (TSEB) therapy. Appropriate treatment planning for TSEB therapy is needed to give homogeneous dose distribution throughout the entire skin surface. The energy of 6 MeV electron from the 18 MeV medical linear accelerator was adapted for superficial total skin electron beam therapy. The energy of the electron beam was reduced to 4.2 MeV by a 0.5cm×90cm×180cm acryl screen placed in a feet front of the patient. Six dual field beam was adapted for total skin irradiation to encompass the entire body surface from head to toe simultaneously. The patients were treated behind the acryl screen plate acted as a beam scatterer and contained a parallel-plate shallow ion chamber for dosimetry and beam monitoring. During treatment, the patient was placed in six different positions due to be homogeneous dose distribution for whole skin around the body. One treatment session delivered 400 cGy to the entire skin surface and patients were treated twice a week for eight consecutive weeks, which is equivalent to TDF value 57. Instrumentation and techniques developed in determining the depth dose. dose distribution and bremsstrahlung dose are discussed.