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A Clinical Analysis of 100 Cases of Gasless Endoscopic Thyroidectomy
Jeong Soo Kim(김정수),Chung Goo Kim(김정구),Kee Hwan Kim(김기환),Chang Hyuck Ahn(안창혁),Hae Myung Jeon(전해명),Keun Woo Lim(임근우),Eung Kook Kim(김응국),Chung Soo Chun(전정수),Jai Hak Lee(이재학),Hyun Shik Son(손현식),Jung Min L 대한외과학회 2002 Annals of Surgical Treatment and Research(ASRT) Vol.63 No.1
옥천대내(沃川帶內) 신당(新堂)-도전리(道田里) 지역(地域)에 대한 ELF-MT 탐사(探査) 연구(硏究)
민경덕,전정수,정승환,Min, Kyung Duck,Jeon, Jeong Soo,Chung, Seung Hwan 대한자원환경지질학회 1988 자원환경지질 Vol.21 No.3
The ELF-MT survey has been conducted at 9 points along the national road between the Sindangri and Dojonri area to study on the boundary between the Okchon and Choson systems, and subsurface geological structure of these two systems. Natural electromagnetic fields of 7.8, 14, and 20 Hz in the Schumann resonant frequency band were used for ELF-MT measurement. Apparent resistivity values were calculated from the measured magnetic and electric fields at each frequency, and resistivity sections were obtained by means of a trial and error method for one-dimensional analysis and finite element method for two-dimensioal analysis. The results of this study show that the resistivities of the Okchon and Choson systems are 700-3500 ohm-m and 40-5000 ohm-m, respectively. The boundary between these two systems is a fault with the width of 1 km fault zone and resistivity value of 200 ohm-m, and is located around Koburangjae. Another fault is appeared in Sindangri, and its resistivity value is 130 ohm-m. Intrusion of biotite granite is distributed in Jungchijae, and its resistivity value is 750 ohm-m. The area between Susanri and Koburangjae shows the highest resistivity value of 3500 ohm-m because metabasite and amphibolite are distributed in that area. Extremely low resistivity value of 40 ohm-m around Yongamsan is due to the Yongam formation, which is composed of graphitic black slate and overlying Choson Great Limestone group.
정승환,김정호,전정수,Chung, Seung-Hwan,Kim, Jung-Ho,Jeon, Jeong-Soo 대한자원환경지질학회 1990 자원환경지질 Vol.23 No.1
Controlled source audio-frequency magnetotelluric (CSAMT) has the great advantage of efficient mapping resistivity distribution and relatively deep depth of investigation. Moreover, CSAMT may be regarded more attractive than audio-frequency magnetotelluric in the sense of the strong and controllable signal. However, it has the problem such as undershoot and/or near-field effect that is hard to be interpreted if the interpretation method of MT is directly applied. The problem arises from the existance of controlled source which makes CSAMT attractive. So the characteristics of CSAMT response should be thoroughly understood prior to interpretation stage. In this study, numerical modeling program for horizontally layered earth was developped for the interpretation of CSAMT field data. CSAMT field survey was run as a follow-up to resistivity dipole-dipole study over the same survey line at Bongmyung coal mine. The survey used a grounded dipole source 2 Km in length and located 7.5Km south in this study. A good agreement between field CSAMT data and calculated data was demonstrated even in geologically complex earth situations.
전경화,진형민,전정수,Kyong-hwa Jun,M,D,Hyung-min Chin,M,D,and Chung- soo Chun,M,D 대한갑상선-내분비외과학회 2004 The Koreran journal of Endocrine Surgery Vol.4 No.1
Medullary thyroid cancer (MTC) accounts for 5% to 10% of all thyroid cancers, and originates from the parafollicular or C-cells of the thyroid gland. More than 50% of patients present with a thyroid mass and up to 75% of these patients have locoregional lymph node metastasis at the time of diagnosis. The neuroendocrine C-cells of the thyroid gland secrete calcitonin, a relatively accurate tumor marker for MTC. Plasma basal and stimulated calcitonin measurements have been used to screen patients who are at risk of developing MTC and indispensable for the detection of residual MTC after initial surgical treatment. The overall survival rate of patients with MTC is intermediate to that of patients with differentiated thyroid cancer and anaplastic thyroid cancer. Postoperative radioiodine ablation therapy, chemotherapy and radiation therapy are generally ineffective. Surgical resection, therefore, remains the only definite treatment for patients with MTC. Unfortunately, residual MTC as indicated by elevated plasma basal or stimulated calcitonin levels is common even after apparent complete initial surgical resection. We present a case of metastatic MTC in the anterior mediastinum with review of the literatures. (Korean J Endocrine Surg 2003;4:55-58)
한반도-일본열도 사이의 광역지진관측 및 해석 ; 포항 STS지진관측소에서의 광대역, 고감도의 지진관측
김성균,정승환,전명순,경재복,전정수,류용규,가주오 오이케,요시오 후까오,이사오 야마다,게이꼬 이시하라,야수시 이시하라,Kim, Sung Kyun,Chung, Seung Hwan,Jun, Myung Soon,Kyung, Jai Bok,Jeon, Jeong Soo,Ryoo, Yong Gyu,Oike, Kazuo,Fukao, Yoshio,Yamada, Isao 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.1
In order to provide informations for the earth's deep interior and the earthquake mechanism, we have been operating the three components of Streckeisen Seismometers at Pohang Observatory, Korea, as a part of a long period seismic network (POSEIDON) in the northwestern Pacific now under construction. The recording system is specially designed to be able to obtain outputs of broad band and wide dynamic range; BRB (Broad Band), LP (Long Period), and VLP (Very Long Period) output. The triggered BRB and LP signals are digitized with the sampling intervals of 0.1 and 0.4 second, respectively. The lowpass filtered VLP output is digitized and recorded contineously with the sampling interval of 10 seconds. About 120 regional and teleseismic events have been successfully recorded for one and half year since late March, 1991. As a preliminary study, eight events of them are analyzed to determine Rayleigh wave dispersion curves in the period range of 20 to 300 seconds for the continental and oceanic paths. The curves are compared with the typical continental and oceanic ones to discuss the earth's deep interior.