• Plant Disease and Agriculture
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• v.5 no.2
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• pp.111-114
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• 1999

A bacterial disease of rice plant that rotted the sheath to brown was found in rice plants at Tanbuk Uisong Kyungbuk in June 1999, When the bacterial isolates from the diseased rice plants were inoculated to health plant by the artificial needle prick method the same symptoms were examined. According to its characteristics and pathogenicity on the his plant the causal bacterium was identified as Burkholderia glumae which is known as the pathogen of bacterial grain rot of rice.

• Proceedings of the KIEE Conference
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• 1994.07b
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• pp.1354-1356
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• 1994

In order to protect cable from rat's biting, a development of rodent repellent is described. This cable has double coated sheath such as construction of skin layer over the conventional cable sheath. Stabilized rodent repellent agent which has good compatibility with PVC is employed in a skin layer. Rodent repellent layer has highly residual properties of agent through the manufacturing process, and meets the general requirements of cable sheath. Also, rat repellent effect is excellent.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.1179-1181
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• 1998

This paper describes the induced voltage of sheath on 154kV transmission power cable in multi fault states. Simulation was carried out to obtain the induced voltage of sheath according to change of, fault angle and grounding resistance using EMTP. Modeling of cable system is also established in EMTP to analyze. The simulation results can be useful reference to design cable system in power system.

• Korean Journal of Head & Neck Oncology
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• v.31 no.2
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• pp.63-65
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• 2015

Nerve sheath myxoma is a benign tumor of the peripheral nerves that rarely occurs in the lip area. Among the few reported cases, no lesion has previously been reported on the lip in Korea. We report a case of nerve sheath myxoma occurring on the lip of a 34 year-old woman with a brief review of the literature.

• Journal of the Korean Arthroscopy Society
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• v.2 no.1
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• pp.97-100
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• 1998

The giant cell tumor of tendon sheath is very rarely present inside the knee joint. The authors report a case of intraarticular giant cell tumor of tendon sheath arising from posterior cruciate ligament which was successfully excised arthroscopically using posterior trans-septal portal at the time of arthroscopic reconstruction of anterior cruciate ligament.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.35D no.5
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• pp.54-62
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• 1998

In a plasma etching system, ions become an important parameter in determining the wafer topography which depends on both the physical sputtering mechanism and the chemically enhanced reaction. this paper reports the energy and angular distributions of ions across the plasma sheath using a monte carlo method. The ion distribution is mainly affected by the magnitude of the sheath voltage and by the collision in the sheath. Furthemore, the local potential distribution in a plamsa sheath has been determined by solving the poisson's equation. In th is work, ionic collisions were cosidered in terms of both charge exchange and momentum transfer. The three-dimensional distributions of ions were calculated with varying the input process conditions in the plasma reactor.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.484-486
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• 2002

In this paper, installation type is analyzed into a single and mixed burying type on burying situation of domestic underground transmission cables, and problem of underground cable is discussed with investigating the relation between burying type and sheath circulation current. Investigated cable systems are 520 T/L which have 512T/L for 154kV and 8T/L for 345kV. The authors consider that the analysis of sheath circulating current with burying type will contribute for setting reduction methods of sheath circulation current.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.175-177
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• 2002

The use of underground transmission cables has increased continuously in densely inhabited urban and suburban for power transmission. Two or more transmission lines are outgoing from one substation in many cases, and one line comprises twin circuits. In order to meet the increasing do and for electric power, underground tables of two or fore circuits are installed in ducts in parallel for several kilometer in the same route. It, however, has not been known generally that the sheath circulating current is generated in a system where a large number of cables are laid on the same route. Therefore, this paper describes an improved analysis method for sheath circulating current on underground transmission cables using EMTP. Author propose several methods to reduce sheath circulating current. The analysing method and reduction methods for two or more underground cables will be really improved for cable system utility.

• Proceedings of the KIEE Conference
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• 1999.07c
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• pp.1391-1393
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• 1999

This paper have analyzed sheath induced voltage in underground transmission cable system which will be operated with cable cover protection unit(CCPU). Simulation was carried out to analyze sheath induced voltage using on real cable system in the case with and without CCPU. Sheath induced voltage was also analyzed according to grounding method, fault resistance and fault angle. Simulation was performed using EMTP and ATP Draw, the simulation results represent whether the arrester is necessary or not in cable system.

• Applied Microscopy
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• v.12 no.2
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• pp.45-53
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• 1982

Ultrastructural changes of the testis in Pieris rapae L. observed under the electron microscope during the metamorphosis from prepupa to pupa. The peritoneal sheath, epithelium of the follicle and cucticle have the maximum thickness at prepupa stage and afterthen gradually they began to degenerate. The epithelium of the follicle which formed by invagination of the peritoneal sheath is differently differentiationed from the peritoneal sheath and it is similar to the adult's from the pupa 2 days. The cell organelles begin to increase in the cytoplasm of the cyst cell enclosed the sperm bundles at pupa 3 hrs. The electron densed granules which observed in the peritoneal sheath and epithelium of the follicle at prepupa seem to be related with fusion of the testis.