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성찬용 ( Sung Chan Yongk ),연규석 ( Yeon Kyu Seok ),류능환 ( Ryu Neung Hwan ),김기성 ( Kim Ki Sung ),민정기 ( Min Jeong Ki ) 한국농공학회 2001 韓國農工學會誌 : 전원과 자원 Vol.43 No.2
This Study is performed to develop an agricultural hydraulic Structure for collecting and dreining pipe using polymer concrete. The water permeability of collecting and draining pipe shows an 5.917ℓ/㎠/h, it is more 190 times as large as in the world maximum rainfall. The external pressure on the collecting and draining pipe is in the range of 1.85~5.25tf/m under 2-edge test, 2.6~6.2tf/m under sand mat and the vertical displacement is in the range of 0.48~1.06mm, 1.01~1.89mm, respectively. Also, an increasing rate of external pressure on the developed pipe is higher than that of PVE pipe to the variation of t/D. Accrodingly, the pipe developed in this study will be used widely in agricultural hydraulic structures such as collecting and draining structure.
집·배수용 투수성 폴리머 콘크리트 관의 농업 수리시설물의 현장적용
민정기 ( Min Jeong Ki ),연규석 ( Yeon Kyu Seok ),성찬용 ( Sung Chan Yong ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.6
This study is performed to evaluate performance of the developed pipe when using for underground drainage in farm land, the efficiency of the pipe is examined such as quantity of drainage, water temperature and other field performance in all weather condition. Results of this study, the higher permeability through wall of the pipe is achieved by making various size pores using open-graded aggregate. And in all weather conditions, permeable polymer concrete pipe perform much better than conventional perforated pipes. During rice farming period, quantity of drainage the permeable polymer concrete pipe is 1.25 time greater than conventional perforated pipes. Therefore, use of the permeable polymer concrete pipe is greater advantages when considering collecting and draining capacity compared with conventional perforated pipes.
Diagnosis of Spinal Arachnoid Cyst using Magnetic Resonance Imaging in a Dog
신창호,김영기,황태성,윤영민,정동인,연성찬,이희천,Shin, Chang-ho,Kim, Young-ki,Hwang, Tae-sung,Yoon, Young-min,Jung, Dong-in,Yeon, Seong-chan,Lee, Hee-chun The Korean Society of Veterinary Clinics 2015 한국임상수의학회지 Vol.7 No.2
6살의 중성화한 수컷 말티즈는 운동실조로 인하여 내원하였다. 본 증례는 일반방사선 촬영, 컴퓨터단층촬영, 자기공명영상을 실시하여 낭종의 위치, 크기, 척수와의 관련성 및 동반된 질환을 알 수 있었다. 자기공명영상 결과 T1W과 FLAIR 영상에서는 hypointense한 영역, T2W 영상에서는 hyperintense한 영역이 L1~2 척수의 등쪽으로 나타났다. 이는 CSF와 동일한 신호로 나타났으며, 등쪽에서 척수를 압박하여 배쪽으로 이동시켰다. 낭종의 길이는 25 mm, 두께는 4 mm로 나타났다. 무증상일 경우는 치료가 필요 없으나, 본 증례는 신경학적 이상이 나타나 수술적 치료를 실시하였다. A 6-year-old, intact male maltese was presented with hindlimb ataxia of 4 day duration. Physical and neurological examinations revealed a bright, alert, and responsive dog, with no evidence of cranial nerve deficits, conscious proprioceptive deficits. Spinal reflexes of the hind and forelimbs were normal. Patellar, cranial tibial, and withdrawal reflexes were normal. Pain could not be elicited on manipulation of the neck or palpation of the spinal column. Survey radiographs of the vertebral column were unremarkable. Computed tomography (CT) scans in the transverse plane were performed. The results of CT imaging were unremarkable. Magnetic resonance imaging (MRI) in both sagittal and transverse planes was performed. The extent of the lesion was 25 mm in length by 4 mm in thickness. The spinal cord was deviated ventrally and appreared thinner. On T1-weighted and FLAIR images, a discrete hypointense lesion dorsal to the spinal cord was observed at L1-2 which was contiguous with the subarachnoid space. On T2-weighted images, this region was hyperintense, consistent with a fluid-filled structure. The signal intensity of the cysts was equivalent to cerebrospinal fluid (CSF). Surgical treatment involving dorsal laminectomy had successful outcomes.
고영권(Young Kwon Koh),주정연(Jung Yeon Joo),이성찬(Sung Chan Lee),노영일(Young Il Rho) 대한소아신경학회 2016 대한소아신경학회지 Vol.24 No.3
신경피부멜라닌증은 피부와 중추신경계를 침범하는 비가족성 선천성 증후군으로 선천성 모반이 매우 크거나, 3개 이상 다수이면서 양성 또는 악성의 연수막 내 멜라닌세포 증식을 특징으로 하는 드문 증후군이다. 증상이 있는 신경피부멜라닌증의 10%에서 댄디 워커 증후군이 동반되며, 이 경우 예후는 매우 좋지 않다. 저자들은 발작으로 방문하여 신경피부멜라닌증과 댄디 워커증후군이 동반된 7세 여아에서 반복적인 IVIG 투여로 일시적으로 신경학적 증상(의식상태와 반마비)이 호전되는 증례를 경험하였기에 보고하는 바이다. Neurocutaneous melanosis (NCM) is a rare nonheritable congenital phakomatosis. NCM is characterized by large or multiple (>3) congenital nevi that are associated with benign and/or malignant melanocytic tumors of the leptomeninges. Approxi-mately 10% of symptomatic patients with NCM have associated Dandy Walker complex (DWC), which seems to have an extremely poor prognosis. We report the case of a 7 year-old patient with multiple congenital NCM associated with DWC, who experienced a transient improvement in neurological symptoms including mental status and hemiparesis after intravenous immunoglobulin (IVIG) therapy. We suggest that the administration of IVIG may play a role in the treatment of symp-tomatic NCM.