http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조경석,조경석,문용재,장비호,김수진,김연한,Park, Y.D.,Cho, K.S.,Moon, Y.J.,Jang, B.H.,Kim, S.J.,Kim, Y.H. 한국천문학회 2003 天文學論叢 Vol.18 No.1
In 2002, a new solar spectroscopic system with the Coelostat type has been installed at Korea Astronomical Observatory. It was designed to observe solar spectra in the range from 3000 to 8000${\AA}$ with the spectral resolution of 1${\AA}$/mm. The system is composed of a 40cm diameter Coelostat with 9m focal length, spectroscopic system with 600groove/mm grating, and a IK ${\times}$ IK CCD detector. By developing observational softwares for this system, we have successfully observed solar Ha spectra. In this paper, we development of telescope control and observational softwares.
두개강내 추골 동맥의 박리성 동맥류 : Case Report
조경석,김달수,하영수,강준기,송진언 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.1
A case of dissecting aneurysm of the intracranial vertebral artery in 46-year-old man is reported. Dissecting aneurysm of the vertebral artery associated with SAH is very rare. The characteristic angiographic findings of dissecting aneurysm were: 1) retention of contrast medium in the aneurysm ; 2) the presence of double lumina ; 3) "String " or "Pearl - string " sign. The therapeutic occlusion of the intracranial vertebral artery was performed successfully.
조경석,라형균,안명수,최창락,송진언 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.1
We reviewed the cases of 9 patients with vascular lesions in thalamus, 5 hemorrhage and 4 infarctions that were confirmed clinical and CT findings. Generally CT scan and clinical datas proved to be helpful to the diagnosis and prognosis to thalamic lesion. However, these findings are not exactly correlated to prognosis of patients. We can gain more informative factors to our patients for Multimodal evoked potential examination (MEP) to analysis. Especially in our cases, MEP findings proved to be the most effective results in the determinations of the prognosis. We review the literature and discuss the treatment and discuss the treatment and prognosis in thalamic lesion. Emphasis is placed on the current and optimal method of the evaluation of prognosis in thalamic lesions using MEP combined with the finding of CT scan and clinical status.
급성 뇌허혈증에 있어 만니톨의 효과에 대한 실험적 연구
조경석,홍용길,백민우,김달수,강준기,최창락 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.8
The development of postischemic irreversible brain damage depends upon the length of ischemia and its severity during arterial occlusion, although release of the occlusion always leads to restoration of normal or above n o d cerebral blood flow. This experiment was planned to determine the effects of mannitol on cerebral ischemia on subsequential izgional cerebral blood flow(rCBF) and somatosensory evoked potential(SEP) following reperfusion after ischemia and also define the proper time of vascular occlusion without irreversible brain damage. Cerebral ischemia was induced in cat by transorbital occlusion of the left MCA with a Sugita clip for period of 30 minutes and the ischemic brain was reperfused for 180 minutes by removing the clip. Foty adult cats, weighing 25 to 4.0㎏ were divided into 5 groups : control(Gmup Ⅰ, n=8), permanent MCA occlusion(Group Ⅱ, n= 8), permanent MCA occlusion with mannitol infusion (Group Ⅲ, n=8), permanent MCA occlusion with mannitol infUsion(Group Ⅲ, n=8), 30 minutes MCA clipping followed by reperfusion(Gmup Ⅳ, n= 8) and 30 minutes MCA clipping with mannitol infusion followed by reperfusion groups((group Ⅴ, n=8) respedvely. The rCBF and SEP measurents were carried out in each animal immediately, after MCA occlusion, at 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes and 180 minues followed by reperfusion. The rCBF was measured by the hydrogen clearance technique. Mando1 was given in bolus of l a g body weight as a 25% solution delivered via the femoral vein The results were as follows: 1) Gradual elevation of intracranial pressure(1CP) and systolic blood pressure were observed after MCA occlusion. Treatment with mannitol in MCA occlusion animals(Group Ⅲ & Ⅴ) decreased ICP immediately a k r idusion of mannitol. 2) Normal control rCBF(ml/100g/min) were 51.94±5.05 in the left temporal(LT) and 50.80± 4.87 in the left perietal lobes(LP). 3) The MCA occlusion resulted in a reduction of the blood flows to 72% of the normal control ones(LT : 14.29± 4.81ml/100g/min) at the left temporal area immediately after occlusion and also a reduction of flows to 80.4% of the normal control ones(LT : 1024± 3.69ml/100g/min) at 180 minutes after occlusion in Group Ⅱ. 4) In the mannitol-treated group(group Ⅳ), reperfwd animals, with removal of the clip on MCA had an improved postischemic recovely of blood flow and ipsilateral cerebral blood flows were restored to 42.5% of the normal control ones(LP : 212±4.13ml/100g/min) at 180 minutes after occlusion in Lt parietal CBF. 5 ) In the reperfusion group(group Ⅳ), reperfused animals, with removal of the clip on MCA had an increase in rCBF to the level of 833% of the control value(LT : 45.78± 6.80ml/100g/min) at 180 minutes after reperfusion and also reperfused animals, with treated mannitol had further increase the blood flow up to the level of 92s % of the control value(LT : 49.04± 43.6 ml/100g/min) at 180 minutes after repexfwion. 6) After the MCA occlusion, the SEP was present but markedly altered in shape and particularly the early components of the SEP were suppressed in the ipsilateral occlusion hemisphere. 7) In the mannitol-treated reperfusion group(Group Ⅴ) the amplitude of the SEP was restored to 80% of control value. The SEP was significantly suppressed if the rCBF fell below 10- 14ml/100g/min. These results suggest that provided CBF can be restored to above the 40% threshold well within 30 minutes, prevention of ischemic brain damage can be expected and also the mannitol may of benefit in prolongation of the time threshold for the formation of the cerebral ischemia after vessel occlusion.
조경석,백민우,김문찬,강준기,송진언 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.1
Normal pressure hydrocephalus (NPH) is defined as a combination of dementia, gait disturbance and/or urinary incontinence, hydrocephalus on C - T scan, with a normal intracranial pressure. The clinical effect of CSF shunting in patients with this syndrome is sometimes striking but generally only 50-60% of the shunted patients benefit from the treatment. So many pre-operative investigations are performed including clinical examination, computed tomography, R - I cistemography, T 1/2 calculated from ventricular volume pressure curve and lumbar drainage. Among the pre - operative investigations, the effect of preoperative lumbar drainage was the most reliable indicator of NPH. The possible mechanisms of improved case are proposed. The differential diagnosis of primary brain atrophy and NPH can be made by the effect of pre-operative lumbar drainage.
조경석,권륜영,김록순,Cho, Kyungsuk,Gopalswamy, Nat,Kwon, Ryunyoung,Kim, Roksoon,Yashiro, Seiji 한국천문학회 2012 天文學會報 Vol.37 No.2
We examine the relationship between a type II radio burst that started from an unusually high frequency of 425 MHz (fundamental component) and an associated white-light coronal mass ejection on 2011 February 13. The radio burst had a drift rate of 2.5 MHz/sec, indicating a relatively high shock speed. From SDO AIA observations we find that a loop-like erupting front sweeps across high density coronal loops near the start time of the burst (17:34:15 UT). We find fragmented structures of the type II burst, which indicates the signature of the shock propagating through the multiple loops. The deduced distance of shock formation (0.06 Rs) from flare center and speed of the shock (1100 km $s^{-1}$) using the measured density from AIA/SDO observations are comparable to the height (0.05 Rs, from the solar surface) and speed (700 km $s^{-1}$) of the CME leading edge observed by STEREO/EUVI. We conclude that the type II burst could be onset even in the low corona (41 Mm or 0.06 Rs, above the solar surface) if a fast CME shock passes through the high density loops.
Opening New Horizons with the L4 Mission: Vision and Plan
조경석,황정아,한정열,최성환,박성홍,임은경,김록순,서정준,손종대,송동욱,곽재영,Miyashita Yukinaga,백지혜,이재진,이진성,류광선,선종호,진호,예성준,문용재,이대영,Peter H. Yoon,Thiem Hoang,Sterken Veerle,Joshi Bhuwan,이창한,장종진,도재휘,김화영,박현정,Natchimuthuk Gopalswamy,Tala 한국천문학회 2023 Journal of The Korean Astronomical Society Vol.56 No.2
The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.