Raising과 Equi-NP-deletion의 綜合可能性에 관하여

文景閏 明知大學校 人文大學 英語英文學科 1989 Veritas Vol.- No.6

최소침습기법을 이용한 요추감압술, 추체간 유합술 및 나사못 고정술-예비보고

문경윤,장태안 대한신경외과학회 2004 Journal of Korean neurosurgical society Vol.35 No.3

Objective : With improvement in endoscopic visualization and surgical tools, several minimally invasive procedures such as transpedicular fixation, interbody fusion, or decompression have advocated their respective advantages. But all these procedures are developed separately and are not related to other techniques. The authors utilize these procedures as organized procedure like comprehensive conventional procedure. This study is designed to study early results of minimally invasive decompression, interbody fusion, and endoscopic pedicle screw fixation. Methods : We utilized minimally invasive decompression, interbody fusion, and endoscopic pedicle screw fixation on 12 consecutive patients(9 female, 3 male, mean age 54.8 years). For decompression, unilateral laminectomy and controlateral laminar undercutting was performed through tubular retractor, and interbody fusion(PLIF or TLIF) was done with one cage and bone packing. Pedicle screw fixation was done using expandable tubular retractor under endoscopic visualization and fluoroscopic guidance. Contralateral screw fixation was done with the same manner. Results : There were five spinal stenosis and seven degenerative spondylolisthesis. All patients received one level (L4-5) decompression, interbody fusion, and fixation. Mean operating time was 245.8 minutes. There was dural tear in one patient. All patients were excellent or good with average follow up of 7.2 months. Bone fusion was not evident due to short-term follow-up, but there were no instability or screw loosening. Conclusion : Although it is small series and has short-term follow-up, this study demonstrates that minimally invasive decompression, interbody fusion, and pedicle screw fixation are feasible and effective.

혈류역학장애 뇌허혈 환자의 두개내-외우회로형성술에서 경두개도플러검사

문경윤,강성돈,김요식 대한신경외과학회 2004 Journal of Korean neurosurgical society Vol.35 No.3

Objective : The aim of this study is to evaluate the effects of intracranial-extracranial arterial bypass (EIAB)surgery on cerebrovascular reserve capacity(CRC) in patients with hemodynamic cerebral ischemia and to assess the significance of transcranial doppler(TCD) examination before and after EIAB surgery. Methods : In 29 consecutive patients who underwent EIAB surgery due to symptomatic internal carotid artery or middle cerebral artery(MCA) occlusion, 21 patients were studied using preoperative and postoperative digital subtraction angiogram(DSA), SPECT, and TCD examination. After measuring mean radioactivity count of a region of interest, relative regional cerebral blood flow(rrCBF) was quantitated by the following formula : lesional radioactivity count/contralateral radioactivity count x 100%. CRC was calculated as the percentage change from baseline flow after a vasodilatory challenge. Results : Postoperative DSA showed good collateral circulation through the bypass except 4 patients. Preoperative mean value of rCRC improved significantly after EIAB surgery from -14.8±2.6% to 6.9±2.7%(p<0.01). Intraoperatively, flow velocity of superficial temporal artery(STA) and MCA just after anastomoses increased remarkably in comparison with the values just before anastomoses(p<0.01). There was no correlation between the change of pre- and postoperative flow velocity and the change of rrCBF. In patients with the increase of flow velocity after surgery manifested good collateral circulation through the bypass. The difference was statistically significant(repeated measures ANOVA, p<0.05). Over a mean follow-up period of almost 3 years, no patient had another episode of brain ischemia. Conclusion : We believe that the measurement of flow velocity is expected a good method to evaluate the degree of collateral circulation through the bypas

파열 뇌동맥류 조기수술을 위한 3차원 전산화단층혈관검사의 함정 - 증 례 보 고 -

문경윤,강성돈 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.3

Three dimensional computed tomographic angiography is a rapid and minimally invasive method of detecting intracranial aneurysms, however, there are some limitation to identify the associated cerebrovascular lesions. We report a case of ruptured dorsal wall aneurysm of internal carotid artery in a 50-year-old man who had underlying stenosis of cervical internal carotid artery, which was overlooked due to lesion outside the scan field of view. Key words:Computed tomographic angiography;Aneurysm;Stenosis;Internal carotid artery.

가변IF 광대역 하이브리드 믹서 설계

문경윤(Kyung Youn Moon),서현석(Hyun Seok Seo),이병찬(Byung Chan Lee),박현우(Hyun Woo Park),구경헌(Kyung Heon Koo) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

This paper presents the design of broadband dual-gate mixer for WiBro, WLAN, and UWB application. Dual gate mixer can improve isolation between RF and LO. Also its conversion gain is better than single device mixer. The mixer can be used for direct conversion receivers.

자발성 종양내 출혈을 동반한 뇌실내 수막종

문경윤 ( Kyoung Yun Moon ),김태영 ( Tae Young Kim ),김종문 ( Jong Moon Kim ) 대한뇌종양학회 2003 대한뇌종양학회지 Vol.2 No.1

Spotaneous intratumoral hemorrhage in meningioma is very rare, and its clinical presentation is frequently sudden compare with classical meningioma. We report a case of intraventricular meningioma with spontaneous intratumoral hemorrhage in a 50-year-old man who presented with sudden headache like cerebrovascular stroke.

Matlab을 이용한 CMS 기반 블랙박스 모델링 기법 구현

문경윤(Kyung Yoon Moon),최인섭(In Seop Choi),장강원(Gang Won Jang) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.5

A Case of an Epidural Extension of Vertebral Hemangioma Treated by Intraoperative Vertebroplasty and Laminectomy

이수언,정준기,김현집,문경윤,장태안 대한척추신경외과학회 2009 Neurospine Vol.6 No.3

Vertebral hemangioma is relatively common, but rarely extends into the epidural space and causes neurological deficits. This case report describes a 69-year-old woman with vertebral hemangioma extending into the epidural space causing spinal cord compression. The patient presented with low back pain and progressive weakness of the left lower extremity over a period of 1 year. Radiologic findings revealed a dural encasing vertebral hemangioma with spinal cord compression at the T11 level. After T11 vertebroplasty, the lesion was subtotally removed by T10-11 total laminectomy. The patient regained motor power of the left lower extremity postoperatively. And no further tumor growth was observed at last follow-up. This combination of intraoperative vertebroplasty and decompressive laminectomy offers a viable treatment modality for a dural encasing vertebral hemangioma with epidural extension causing cord compression. Vertebral hemangioma is relatively common, but rarely extends into the epidural space and causes neurological deficits. This case report describes a 69-year-old woman with vertebral hemangioma extending into the epidural space causing spinal cord compression. The patient presented with low back pain and progressive weakness of the left lower extremity over a period of 1 year. Radiologic findings revealed a dural encasing vertebral hemangioma with spinal cord compression at the T11 level. After T11 vertebroplasty, the lesion was subtotally removed by T10-11 total laminectomy. The patient regained motor power of the left lower extremity postoperatively. And no further tumor growth was observed at last follow-up. This combination of intraoperative vertebroplasty and decompressive laminectomy offers a viable treatment modality for a dural encasing vertebral hemangioma with epidural extension causing cord compression.

Relay Node RF Module 개발에 관한 연구

강형창(Kang Hyoung Chang),문경윤(Moon Kyoung Youn),황상진(Hwang Sang Jin),은세영(Eun Se Young) 한국통신학회 2011 한국통신학회 학술대회논문집 Vol.2011 No.2

본 논문에는 망 전체의 커버리지 확장과 음영지역에서의 Throughput 확장을 제공하는 3GPP Release 10 의 LTEAdvanced Relay Node System 을 최초로 설계 구현에 적용하여 그 성능을 살펴보고자. 설계된 시스템은 3GPP Release 10 에 근거하여 모듈 별 입출력 및 성능을 정의하고, 구현된 2.6GHz 주파수 대역 시스템의 성능을 분석하여 성능이 만족함을 증명하였다. 더불어 국내 LTE-A 주파수 할당 대역에 대응시켜, 전파의 경로 손실, 안테나 이득과 같은 무선 성능과 소형화, 경량화, 저전력화를 반영한 성능 최적화를 위한 시스템의 각 파라메터를 제안한다. In this paper, We define the specifications for LTE-Advanced System Relay Node RF Module which makes a contribution to expand cell coverage and throughput at shadow area. Then we develop the system for 2.6GHz Band, and analyze the system performance. In comparison with different frequency band for domestic LTE-Advanced system, we suggest the optimized system parameters with the object of miniaturization, light weight, low power consumption.