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정상범,김현호,이천희 청주대학교 산업과학연구소 1997 産業科學硏究 Vol.15 No.-
Epitaxial layer is widely used to improve the defects density, leakage currents characteristics, and latch-up characteristics in silicon devices. In this study, electro-static discharge(ESD) characteristics of the CZ substrate compared with those of the epitaxial layer. There is small amount of leakage currents in the discharge protective circuits using a thin epitaxial layer, and they degrade the ESD resistance. The leakage currents are caused by low resistivity of epitaxial layer, the delay time increase on the ESD protective circuits, and the overstress of the pn junctions near the field oxide edges.
정상범,전재규,정정길 대한통증학회 1988 The Korean Journal of Pain Vol.1 No.1
Recently, epidural tunnelling was introduced for the convenience of keeping a catheter inserted for a long period of time. We had 15 cases in which used epidural tunnclling for the treatment of intractable pain mainly in teminal cancer patients. 1pidural puncture with cannulation was carried out in the same technique as used for epidural anesthesia. After the subcutaneous epidural tunnelling was done from the site of the epidural entry to the anterior chest, just under the skin using a tunnclling device, the catheter was thre- aded through the tunnelling needle at the site of the outlet, was fixed and the tip of the catheter was connected to a filter. Five ml (2mg) of saline diluted morphine can be given at home as needed when intractable pain occurs. This long-term treatment of intractable pain by morphine injections through the epidural cannula place by subcutaneous tunnelling, is very convenient for the patient's daily routine and a better alternative in such a situation. Our technique, its advantages and problems were described in this paper.
금속이온 농도에 의한 IMI-O LB막의 전기전도도 특성
정상범,유승엽,권영수 동아대학교 정보기술연구소 2000 情報通信硏究所論文誌 Vol.8 No.1
Metal ion complex of poly(N- (2-4-imidazolyl)ethyl)maleimide-alt-1-octadecene (IMI-O) polymer used to confirm the possibility of molecular device made by Langmuir-Blodgett(LB) method. Electrical properties of the metal ion complex LB film were investigated using Metal/Insulator/Metal(MIM) structure. In the surface pressure-area(π-A) isotherms of IMI-O polymer, the surface pressure at collapse point has a difference due to the interaction between polymer and metal ions. And the complex between polymer and metal ions could be verified through the investigation by Raman spectroscopy. In the current-voltage(I-V) property, the conductivity change of IMI-O polymer complexes due to the kinds of metal ions couldn't be observed. However, the limiting area of molecules was changed by the concentration of the metal ions and the conductivity was increased with the occupied molecular area.
마취전 리도카인 정주(靜注)에 의한 삽관 및 발관시의 안압조절(眼壓調節)
정상범,전재규,서순애 대한마취과학회 1987 Korean Journal of Anesthesiology Vol.20 No.1
It is a known fact that the increase of intraocular pressure results from the action of succinylcholine, endotracheal stimulation to carina, bucking and coughing etc during the induction arid recovery periods. Efforts have been made by several inveatigators to prevent intraocular hypertension by giving trimetaphan, inderal or curare. However, their effects were not remarkable. In this study, lidocaine 1mg/kg was administered intravenously to selected patients 2-3 minutes before induction ; followed by regular induction with pentothal, succinylcholine and intubation. Intraocular pressures were measured at the pre-induction and post-intutation time, and every 30 minutes until the early recovery period, thereafter. The result of this study showed that the post-intubational increase of intraocular pressure was prevented in 86.7% of the lidocaine pretreated cases. The increase of post-extuba-tional intraocular pressure was also reduced significantly in the lidocaine pretreated group as well. We came to the conclusion that lidocaine pretreatment technic can be used effectively to prevent intraocular hypertension caused by induction and extubation in clinical practice.