해수에서의 알루미늄 합금의 부식 거동에 관한 연구

許振,李承哲,李浩均,李宰鎬 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

(O_R_V) which vaporizes the LNG to NG is consisted of the tube and the header whose substrate is aluminum alloy. The corrosion of the tube is very severe because of the sea water being used as the heating source. In this study to protect the (O_R_V) substrate material, the corrosion behaviors of several aluminum alloys have been investigated. Al1080, Al3003, Al5083, coextruded and thermally sprayed Al-Zn (<2wt%) and Al-Zn (<2wt%) aluminum alloys were prepared for the electrochemical and immersion tests, and the surface analysis. As the result of the investigations, the corrosion potential of Al-Zn (<2wt%) alloy is lower than that of Al3003 alloy regardless of the content of oxygen dissolved in the sea water. The same trend was also observed with time. The surface roughness and the adhesion of coextruded coating layer of Al-Zn (<2wt%) is superior to those of the thermally sprayed coating layer. From the results of the immersion test to observe the corrosion behavior of Al-Zn (<2wt%) aluminum alloy, the corrosion products has the double layer that is considered as the oxide or the hydroxides layer.

5-Fluorouracil 투여가 마우스공장 소낭선세포의 방사선조사 효과에 미치는 영향

허승재,박찬일,장선택 중앙대학교 의과대학 의과학연구소 1985 中央醫大誌 Vol.10 No.3

The interaction of radiation and 5-Fluorouracil(5-FU) on mouse jejunal crypt cells was studied using the microcolony survival assay. 150㎎/㎏ of 5-FU was injected intraperitoneally 15 minutes before irradiation and 6 hours after irradiation. Jejunal crypt cells of mouse survived more when 5-FU was given 15 minutes before irradiation than giving it 6 hours after irradiation. The mean lethal doses(Do) of each of irradiation alone group, 5-FU injection group of 15 minutes preceding irradiation, and 5-FU injection group of 6 hours postirradiation were, 135, 135, and 114 rad respectively. The dose effect factor of each of 5-FU injection groups of 15 minutes preceding irradiation and of 6 hours post irradiation were 1.13 and 1.27.

방사선치료 2040 예의 악성종양의 분석

허승재 순천향대학교 1993 논문집 Vol.16 No.4

From July 1985 to April 1993, total 2040 new patients with malignant neoplasms were treated by radiation in the Department of Therapeutic Radiology, Soonchunhyang University Hospital. Male cases were 872, and female were 1168. Curative radiotherapy was done in 830 (41%) patients, palliative in 563 (28%), and pre or post-op radiotherapy in 503(25%). Most common tumors were lung cancer in male, and uterine cervical cancer in femalw. Some clinical features of the malignant neoplasms treated by radiotherapy were discussed.

쑥뜸의 연소특성과 전기쑥뜸기 시스템 개발에 관한 연구

양승열,박영배,이호재,허웅 明知大學校 産業技術硏究所 1994 産業技術硏究所論文集 Vol.13 No.-

In this paper, we study about moxa combustion characteristics and implemented electric moxa cure system which have same effect as a real moxa cure system which have same effect as a real moxa. For this purpose,we analyzed moxa combustion characteristics and then,devised the electrical moxa cure system by using the obtained results. The electrical moxa cure system consist of a thermal stimulating part (heater, themal sensor). and amplifier, A/D converter, PWM power controller, and a computer system. As a result of the experiments. it shows very simular stimulation patterns that a real moxa.

선천성 혈관 기형 환자의 등록관리

김동익,허승,이병붕,도영수,이재승,임세웅,이순정 대한혈관외과학회 1998 Vascular Specialist International Vol.14 No.2

There is not a unique registry program about the CVM patients in Korea, even in the World. During the business meeting of International Society for the Study of Vascular Anomalies (ISSVA) 1996 in Rome, a sincere discussion took place about the 1988 Hamburg classification of CVM. This was followed by introduction of registry form that could be used universally throughout the world. We developed a CVM registry program calling CVM for world-wide sharing and analysis. This program is a typical database program application system based on Borland' s Delphi 1.0 and the database is managed with dBase III ┿. It became clear ncoporating the Hamburg classification would be natural while expanding the diagnosis and treatment sections. This is a user-friendly, self-explanatory program that hardly needs any tutorial or instruction. Nonthless, for the foolhardy, it comes with manual that explains every aspect of it. Every panel comes with friendly buttons at your service at the stroke of the mouse or the pad. It can be used either on Windows 3.1 or 95, switching back and forth depending on your computer's capability. The program may obtained by diskettes, compact disc or downloaded from the Internet hompage. We will endeavor to upgrade periodcally as necessity arises.

동맥 색전술과 외과적 절제술을 이용한 선천성 혈관기형 치험 2 예

김동익,허승,이병붕,도영수,이재승,임세웅,이순정 대한혈관외과학회 1998 Vascular Specialist International Vol.14 No.2

As for treatment of congenital vascular malfomation (CVM), intra-arterial embolization provide transient symptomatic relief but recurrence of the lesion occurs in most cases and surgical excision alone has great potential risk such as massive bleeding, functional deformity and explosive recurrence. Combination of selective embolization of vascular pedicle and immediate surgical excison offers the best chance for definite results. We report here two cases of sucessful treatment of CVM with combination of N-butyl-2-cyanoacrylate (NBCA) glue in embolization and surgery.

원발성 폐암 환자의 생존율에 관한 보고

김현태,이상무,어수택,박춘식,정성환,허승재,남충희,강창희,김용훈 순천향대학교 1994 논문집 Vol.17 No.4

We analysed 404 patients with primary lung carcinoma who were treated at Soonchunhyang University Hospital from July, 1985 to september, 1993 in order to investigate the survival rate and epidemiolgical properties of primary lung cancer. They were 330 males and 74 females. The most prevalent decade was seventh. In terms of cell type, the squamous cell was 225 patients (55%), and adenocarcinoma, small cell, mixed type was 21%, 19%, 4%, respectively. Among non-small cell lung carcinoma, stage Ⅲa was the most prevalent one(92%). In case of small cell carcinoma, the limited stage was 64%. The 12-, 24-, 36- month survival rate of total patients was 57%, 31%, 22%, respectivley and median sruvival time was 15 months. The 36-month survival rate tended to be longer in non-small cell lung carcinoma than that of small cell lung cancer, but there was no difference between two groups, statistically. In non-small cell carcinoma, The 36-month survival rate and meidan survival time were longer in the stage Ⅰ and Ⅱ than those of Ⅲa, Ⅲb, Ⅳ (80% versus 38%, 22%, 0%, p<0.05). According to involvement of lymph node, the 36-month survival rate was longer in NO and N1 than those of N2, N3 (61.9%, 48.7% versus 17.7%, 17.3%, p<0.05). In small cell carcinoma, The 36-month survival rate and median survival rate were higher and longer in limited stage than those of extensive stage(16.1% and 13 month vs 10% and 8 month, p<0.05). In conclusion, we report here the incidence of primary lung carcinoma and the survival rate of paients with primary lung carcinoma who were treated in Soonchunhyang University Hospital.

Biologic Effect of Non-Ionizing Radiation

Huh,Seung-Jae,Wu,Hong Gyun 대한방사선 방어학회 1995 방사선방어학회지 Vol.20 No.3

비전리 방사선의 인체에 대한 작용은 최근 우리주위에서 많이 사용되는 microwave, radio wave, laser, ultrasound wave, ultraviolet radiation 등의 문제가 될수 있으며 본고에서는 주고 Radio Frequency Electromagnetic(RFEM) spectrum의 shortwave 와 microwave 의 생물학적인 작용을 정리 발표하고자 한다. RFEM에 의한 carcinogenesis에 관해서는 아직 RFEM이 인체에서는 발암물질로서 작용한다는 보고는 없으나, cancer promotion에는 작용할 것으로 보고는 있다. chromosomal effect에 관해서는 체외실험에서 microwave에 의한 chromosome의 stickiness의 증가와 mitotic index의 변화에 관한 보고가 있다. 인체에서는 RFEM에 많이 피폭되었다고 알려진 Moscow의 미 대사관 직원 5000명을 대상으로 한 역학조사에서는 특별한 염색체 이상은 발견되지 않았다. 동구에서의 보고에 의하면 RFEM에 의한 선천성 기형아의 출산이 보고 된바 있으나 출산시의 통증을 줄이기 위한 2450 MHz의 microwave를 조사한 산모 2000명 출산아에서 기형은 없었다고 한다. 인간의 행동과 정서적인 측면에서 RFEM에 의한 변화는 1974년 Sadcikoda에 의해 기술된바 있는 "microwave sickness"는 irritability, 두통, 전신쇄약, 불면증, 성욕 감퇴 및 발기부전 등을 호소하는 중후군으로 주로 동유럽의 저자들에 의하여 보고되고 있으며 구 소련에서는 microwave sickness 또는 radio wave sickness는 확실한 하나의 임상병명으로 간주되고 있다. cataractogenesis에 관해서는 실험 동물에서 잘 연구되고 있으며, 사람에서도 1952년 레이다 작업종사자 에서 보고된 이후 50여례 이상의 보고가 있으나 백내장 자체가 그 발생 빈도가 높은 질환이고 많은 원인이 있으므로 아직 인간에서의 확신한 cataractogenesis에 관해서는 더욱 연구가 필요한 분야이다. radar wave에 노출된 적이 있는 군인을 대상으로한 미 해군의 역학조사에 의하여 radar wave에 의한 uveitis, retinitis와 비진행성 백내장등이 보고되고 있으나 딴 연구에서는 입증된바 없다. The Radio-frequency electromagnetic(RFEM) spectrum is defined as waves that range in frequency from>0 to 3 ×1012 Hz. Although there are several thousands of reports that present data or opinion of the biological response to RFEM radiation, no consensus has emerge4d reagrding thresholds and mechanisms of injury. This review presents a overview of the subject on mechanisms of interaction of RFEM fields with tissue, chromosomal and mutagenic effect, carcinogenic effects. The scope of the review is expanded to include systemic effects such as those on reproduction, growth and developement, hematological effects. some biological end opints, those with associated with behavior and cataractogenesis is discussed.

High Dose Rate Intracavitary Radiation Therapy for Head and Neek Tumors

Huh,Seung Jae 순천향대학교 1989 논문집 Vol.12 No.1

A simple high dose rate intracavitary irradiation of carcinoma of the nasopharynx and maxillary antrum has been found useful as a supplementary radiation boost to the primary site. Local control of such head and neck tumors can be enhanced by employing this technique.

Recent trends in intensity-modulated radiation therapy use in Korea

Huh, Seung Jae,Park, Won,Choi, Do Ho The Korean Society for Radiation Oncology 2019 Radiation Oncology Journal Vol.37 No.4

Purpose: We aimed to analyze the trend in intensity-modulated radiation therapy (IMRT) use in Korea from 2011 to 2018. Materials and Methods: We collected data from the Health and Insurance Review and Assessment Service (HIRA) big data based on the National Health Insurance Service claims and reimbursements records using primary treatment planning codes (HD 041) for IMRT from 2011 to 2018. We analyzed the changing patterns in clinical application to specific tumor sites and regional differences in IMRT utilization. Results: The use of IMRT has exhibited an 18-fold steep rise from 1,921 patients in 2011 to 34,759 in 2018. With regard to IMRT in 2018, 70% of patients (24,248/34,759) were treated in metropolitan areas (Seoul, Incheon, and Gyeonggi Province). IMRT was most commonly used to treat breast, lung, and prostate cancers in 2018. Among these, the use of IMRT for breast cancer shows the most remarkable increase from 2016 when the National Health Insurance began to cover IMRT for all solid tumors. Conclusion: The use of IMRT is steadily increasing to treat cancer and is concentrated in metropolitan areas.