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박세진,차지영,김학상,김봉용 경북대학교 농업과학기술연구소 2006 慶北大農學誌 Vol.24 No.-
This study was carried out to investigate the influence of glycerine on the properties of paper. Two types of glycerine treatment were used. First type, when making handsheets, glycerine was added in the plup slurry. Second type, copying paper was soaked in glycerine solution. Microwave treatment was used for the test of paper degradation. The obtained results were summarized as follows: 1. The glycerin was very effective to improve the property of softness. 2. The glycerine was helpful to increase sizing performance of paper as a fixing agent of sizing emulsion. 3. Curl tester was comparatively useful for the measuring of sizing degree.
MIS型 Microstrip에서의 크로스토크와 遲延에 관한 解析
남태철,차상학 嶺南大學校 工業技術硏究所 1989 연구보고 Vol.17 No.2
As the density and speed of integrated circuits are continuing to increase, it becomes important that microstrip interconnections can limit overall performance of an integrated system. In this paper, we analyzed crosstalk and propagation delay due to semiconductor thickness and resistivity in microstrip interconnection of MIS type, and investigated crosstalk and delay values in optimized interconnection conditions. In MIS structure interconnection, as the semiconductor thickness and resistivity were decreasing, crosstalk and propagation delay were reduced. Therefore, when the shielding plate is inserted between semiconductor and insulator, crosstalk and propagation delay give the same values as those of zero thickness of semiconductor. Inserting shielding ground plate, the interconnection whose geometric values are 10㎛ strip width, 10㎛ space and 10㎝length, has 7.6% crosstalk and 0.76 nsec propagation delay at 100㎒ frequency.
Overdosage of Methylparaben Induces Cellular Senescence In Vitro and In Vivo
Cha, Hwa Jun,Bae, Seunghee,Kim, Karam,Kwon, Seung Bin,An, In-Sook,Ahn, Kyu Joong,Ryu, Junghwa,Kim, Hey-Sun,Ye, Sang-Kyu,Kim, Byung-Hak,An, Sungkwan The Society for Investigative Dermatology, Inc 2015 The Journal of investigative dermatology Vol.135 No.2
Design of Graphic Memory for QVGA-Scale LCD Driver IC
Sang-Rok Cha,Bo-Sun Lee,Hak-Yoon Kim,Ho-Yong Choi 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper presents a design of graphic memory for QVGA (320 ×240 dots) scale LCD Driver IC (LDI) with 262k-color LCD display. The graphic memory is designed based on 1-T RAM using a word line partion structure to reduce chip area. Also, a collision prevention circuit is designed to perform the read, write, refresh and line-read operations in stable without signal collisions. A circuit of the graphic memory has been designed in transistor level using 0.18 ㎛ CMOS technology library and verified using Hspice.
車喜中,崔雲成,高鶴鍾,沈輔星 대한신경외과학회 1975 Journal of Korean neurosurgical society Vol.4 No.2
Seventy cases of intracerebral hematomas were analysed, forty-six of spontaneous origin and remainder of traumatic one, which had been experienced in Seoul National University Hospital between March 1970 and June, 1975. The results were as follows: A. Among forty-six cases of spontaneous intracerebra1 hematomas, twenty-six cases (52%) were primary intracerebral hematomas, normotensive or hypertensive, seven aneurysmal ruptures (15%), seven arteriovenous malformations (15%), two cerebral rete mirabiles, one tumor bleeding, one leukemia, one idiopathic thrombocytopenic purpura and one due to other blood dyscrasia. 1. Among twenty-six cases of primary intracerebral hematomas, angiography was performed in all and fourteen cases were operated. The sites of hemorrhage were as follows: a. Putaminal hemorrhage: 17 cases (65%) (two cases associated with intraventricular hematoma) b. Thalamic hemorrhage: 5 cases (19%) (two cases associated with intraventricular hematoma) c. Subcortical hemorrhage: 4 cases (16%) 2. Overall mortality among twenty-six cases was forty-six per cent; operative mortality was forty-three per cent, and non-operative, fifty per cent. 3. Age, mode of onset, level of consciousness at the time of surgery and the site of hematoma were all important factors for surgical result. Surgical intervention seemed to be most favorable in patients who had verbal communication with subcortical or localized putaminal hematoma. 4. Normotensive group was worse than hypertensive one with conservative treatment, but the former was more benefited than the latter with surgery. 5. Intracerebral hematomas due to aneurysmal rupture, arteriovenous malformation and others were also influenced with above mentioned factors, but the nature of underlined disease was of prime importance. B. Among twenty-four operated cases of traumatic intracerebral hematomas: 1. Five cases(21%) showed classical lucid interval with variable duration from thirty minutes to forty-eight hours. 2. Tempora1 lobe was most frequently involved (63%). 3. Lateral blow was Predominant than axial blow, and contrecoup than coup lesion. 4. Overall mortality was twenty-nine percent. 5. Age, lucid interval, preoperative level of consciousness and associated cerebral contusion or subdural hematoma were important factors for prognosis, but the preoperative level of consciousness was of prime importance.
車喜中,金國起,高鶴鍾,沈輔星 대한신경외과학회 1975 Journal of Korean neurosurgical society Vol.4 No.2
Recently we had experienced a case of posterior migration of herniated lumbar nucleus pulposus over the cauda equina, simulating a cord tumor clinically and radiologically. But we could hardly find any previous case report on it. A 35 years old man was admitted to our ward due to paraparesis on July 17, 1975. He had a history of back sprain five years ago with intermittently appearing mild lumbago. Two weeks prior to admission, there appeared severe left leg pain and soon resulted in paraparesis. Preoperative positive neurologic findings were paraparesis with left side foot drop, hypesthesia on the left L 4,5 and S 1 dermatome and bilaterally decreased ankle and knee jerks. Myelogram revealed complete block at L2-3 with suspicious indentation filling defect at left L4-5 interspace. C.S.F. protein value marked 738㎎%. On operation, the dural sac was compressed by a posteriorly overriding mass on it at the L2-3 level. The mass was traced to its origin from the left side of the L2-3 interspace and into the ruptured posterior longiturdinal ligament with a narrow pedicle. L4-5 interspace revealed a typically protruding type disc lesion. These were composed of degenerated nucleus pulposus on histological examination.