홍씨 앞방각측정법의 임상적 유용성

강신희,박기호,홍철,김동명,Shin Hee Kang,M,D,Ki Ho Park,M,D,Chul Hong,M,D,Dong Myoung Kim,M,D 대한안과학회 2007 대한안과학회지 Vol.48 No.3

Purpose: To compare the Hong`s grading method, utilized for slit-lamp grading of the mid-peripheral angle, with other conventional grading methods. Actual angle was measured by ultrasound biomicroscopy (UBM) for comparison. Methods: Fifteen eyes with narrow angles and eighteen eyes with wide angles were studied. The average age of thirty-three subjects was 46.8±19.2, and the male to female ratio was 1:3.7. The mid-peripheral angle was graded by Hong`s, van Herick`s and Spaeth`s grading system. The actual anterior chamber angle was evaluated by UBM and the correlation between each grading system and actual angle was investigated. Results: The results from the Hong`s grading (r=0.802, R2=0.643, p<0.01), Spaeth`s grading (r=0.728, R2=0.530, p<0.01) and van Herick`s grading (r=0.618, R2=0.382, p<0.01) methods correlated significantly with the actual angles. Conclusions: The Hong`s grading method was an easy and effective tool to evaluate anterior chamber angle. In addition, the results of the Hong`s grading method were closer to the actual angle than the other methods.

TLD 방사선 센서용 판독장치의 제작

우홍,강희동,최희동,이상윤,도시홍,김도성 경북대학교 센서기술연구소 1992 센서技術學術大會論文集 Vol.3 No.1

LiF : Mg, Cu, P-PTFE TLD 방사선 센서의 제작과 특성 조사

김도성,우홍,강희동,최희동,이상윤,도시홍 경북대학교 센서기술연구소 1992 센서技術學術大會論文集 Vol.3 No.1

원형 Cavity를 이용한 펄스형 Nb:YAG 레이저의 출력특성 및 병렬메쉬 회로의 최적화

홍정환,송금영,양동민,김휘영,김희제 부산대학교 생산기술연구소 2001 生産技術硏究所論文集 Vol.60 No.-

본 연구에서는 기존의 타원형 cavity가 아닌 원형 cavity를 설계 및 제작하여 그 동작특성에 관하여 연구하였다. 그 결과 타원형 cavity 보다 다소 적은 레이저 출력 효율 2.1%를 얻었다. 원형 cavity는 타원형 cavity 보다 컴팩트하며 제작하기가 용이하고, 제작 단가가 저렴하다는 장점이 있다. 입력에너지, 입력전압 및 펄스 폭을 동일하게 했을 경우 주회로 병렬 메쉬회로수를 최적화하고자 한다. PFN 회로를 1단에서 8단까지 PSPICE로 모의시험한 전류파형과 실제 실험한 전류파형이 거의 일치하였다. 그 결과 500㎲이상의 펄스 폭에서 6단 메쉬가 최적의 병렬 메쉬라는 결론을 얻었다. In this study, we have deigned and manufactured not only a present elliptic cavity but also a circular cavity, and experimented the operational characteristics. As a result, we obtained the maximum efficiency of 2.1% that was not less than that of an elliptic cavity. A circular cavity is much more compact and is easier to be manufactured than an elliptic cavity. And it can be made at a low cost. When the input energy, input voltage, and pulse width were in the same condition, we tried to decide the optimization of the mesh number of a parallel-mesh circuit which was connected with main power supply. The PSPICE simulation waveform of PFP(Pulse Forming network) circuit ranging from 1-mesh to 8-mesh nearly corresponded with the real current waveform obtained through a practical experiment. From these experimental results, we obtained the result that 6-mesh was the optimal parallel-mesh circuit in case that the pulse width was more than 500㎲.

고속 주축 상태 모니터링용 광파이버 변위 센서 설계 제작 및 성능평가

홍준희,박찬규,신우철,이동주 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

This paper is focused on practical applicability of the optical fiber sensor considering the machine center which is going to use them. Optical fibers may be fluctuated because the machine center operates as column moving type. This causes distortion of the sensor output signal. To reduce this problem, we have improved the sensor structure and its bracket. And we evaluated performances of the sensor.

무증상으로 발견된 담낭-담관 누공을 동반한 Mirizzi 증후군 1예

홍진희,전태주,서지영,서동대,오태훈,신원창,최원충,신은아,김기환 인제대학교 2009 仁濟醫學 Vol.30 No.-

Mirizzi's syndrome is a rare complication of the gallstone disease, characterized by narrowing of the common bile duct (CBD) due to chronic extrinsic compression of an impacted gallstone in the cystic duct or the neck of the gallbladder. The impacted gallstone may erode into the bile duct, causing cholecystocholedochal fistula. The patients generally have history of repeated attacks of jaundice and abdominal pain. But there is no report about asymptomatic Mirizzi syndrome with cholecystocholedochal fistula which were found incidentally. So herein we present our clinical experience with a case of asymptomatic Mirizzi syndrome with cholecystocholedochal fistula in a young female.

깊이 지도를 이용하는 파노라마와 그래픽 영상의 합성을 이용하는 실감 콘텐츠 생성

홍동희,김만배 강원대학교 정보통신연구소 2005 정보통신논문지 Vol.9 No.-

Recently, the interest in the three-dimensional (3D) images has been increased. Various methods have been attempted to express and produce the contents of 3D images. One of them is the composition of real images and computer graphics images. In this paper, we propose a composition method for a real image that has a depth map acquired from a depth camera as well as computer graphic images. A depth map of the graphic image is generated with a z-buffer technique. We propose an adjustment method for an accurate alignment with a depth map of a real image. The composition of the real and graphics images uses a well-known z-keying technique. Furthermore, it embodies a panorama image with composition of multiple images captured from a moving depth camera. For this, we propose an efficient method which composes the panorama image and graphic image. This method makes it possible to produce realistic contents so that a user can feel realistic and immersive feeling.

XML 문서의 관계형 데이터베이스 게이트웨이 설계 및 구현

홍동현,김정희,곽호영 제주대학교 공과대학 첨단기술연구소 2002 尖端技術硏究所論文集 Vol.13 No.1

In this paper, using the characteristics of XML document, the method that separately stores the structures and contents of XML documents, is proposed for the relational database(RDB), which is representative of the industrial world. The design of the storage architectures to efficiently store XML documents and easily reconstruct the original documents in RDB, is based on E-R modeling. In order to practically store XML documents in RDB, XML Parser and Inserter that handle XML documents according to the proposed storage architecture, were implemented. And when the structures and the contents of XML documents are separately queried, to turn out a complete result, Extractor and XML Composer were also implemented. Moreover, the convenient user interface was designed to easily store and query XML documents.

대장암에서 림프절 전이의 위험인자

홍동민,천봉권,장희경 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.2

Backgroud: Colonic and rectal cancers recently increase in incidence and motality in Korea. Although a variety of therapeutic modality has been applied, the result of therapy for the patients having lymph node metastases is not good. Especially the patient can have lymph node metastases in spite of early colonic and rectal cancer, and high recurrence rate is expected if non-radical therapy without adjuvent modality is applied to these patient in follow-up period. Therefore it is aimed to identify the risk factor affecting lymph node metastasis and to evaluate the possibility of the nodal metastases preoperatively and postoperatively. Methods: This retrospective study of 463 patients having suffered lower anterior resection, Miles operation or colectomy for colonic or rectal adenocarcinoma. Invasiveness, size of the carcinoma, age, vascular invasion, lymphovascular invasion, perineural invasion , sex, and grade of the carcinoma was evaluated as the possible risk factors of lymph node metastases. Results: Resected colonic and rectal adenocarcinoma reveals regional lymph node metastases in 46.3% cases. The nodal metastasis is statistically correlated with increase in tumor stage, tumor grade, and presence of lymphovascular and perineural invasion, and older age (p<0.05). Conclusion: Invasiveness, tumor grade, age, presence of lymphovascular invasion and perineural invasion would be risk factors expecting the regional lymph node metastasis in the colonic and rectal cancers. Therapeutic modality should be determined especially in tumor stage more than T1 because regional lymph node metastasis is expected.

QS 9000 인증이 기업에 미치는 효과 분석

홍성일,이동기,최희영 한국의사결정학회 2000 경영과학연구 Vol.9 No.-

These days most companies are required to acquire quality assurance systems, such as ISO 9000, ISO 14000, ISO 18000, and QS 9000 etc. To analyze the effects of QS 9000 Quality System on company quality improvement, empirical data is collected from quality assurance engineers who has on certification activities. QS 9000 is an international standard which defines the basic features of an effective ISO 9000 Quality Management System. It is essential to acquire certification of Quality Assurance System to improve competitive power of the firm. But, most of the domestic firms struggling to acquire those certifications face on the many problems. Results of the study showed that : ⅰ)Most machine manufacturing companies in korea employ some sorts of Quality Management System. Some beneficial effects were produced when the QS 9000 Quality Management System was used. ⅱ) The Big 3 automakers use quality manuals and procedures of QS 9000, but although used, there was still unsolved problems.