• Journal of Korean Neurosurgical Society
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• v.40 no.4
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• pp.293-295
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• 2006

Infundibular dilatation is funnel-shaped symmetrical enlargement that occurs at the origin of cerebral arteries and which is apparent on 7 to 25% of normal angiograms. Infundibular dilatation is frequently considered a normal anatomic variation of no pathologic significance. The authors report a case in which an aneurysm developed on an infundibular dilatation of the posterior communicating artery [PComA]. A 72-year-old woman presented with severe headache, nausea, and vomiting. Digital subtraction angiography showed a saccular aneurysm arising from the origin of the left PComA. Operative findings revealed the aneurysm and infundibular widening of the right PComA. The aneurysm was successfully obliterated. Whether infundibular dilatation is a pre-aneurysmal state or a benign dilatation is controversial. However, we believe infundibular dilatation of the PComA in this case may have served as a pre-aneurysmal lesion.

• Journal of Yeungnam Medical Science
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• v.5 no.2
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• pp.201-203
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• 1988

Separation of the pubic symphysis in association with delivery is very rare. The Korean orthopedic and obstetrical literature pertaining to this syndrome is absent. The physiological widening is small and asymptomatic, but a separation of more than one centimeter may occur and is usually symptomatic. A twenty-six-year-old woman of separation of symphysis pubis associated with delivery was treated successfully with the treatment of reduction and pelvic band, with absolute bed rest in the lateral decubitus position.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.05a
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• pp.468-472
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• 2007

For small capacity rectifier circuits such as these for consumer electronics and appliances, capacitor input type rectifier circuits are generally used. Consequently, various harmonics generated within the power system become a serious problem. Various studies of this effect have been presented previously. The absence of switching devices makes systems more tolerant to over-load, and brings low radio noise benefits. We propose a power factor correction scheme using a LC resonant in commercial frequency without switching devices. In this method, It makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency, Hence, the harmonic characteristics can be significantly improved, where the lower order harmonics, such as the fifth and seventh orders are much reduced. The result are confirmed by the theoretical and expermental implementations

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.42 no.4
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• pp.215-220
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• 2016

In prolonged chronic osteomyelitis, chronic inflammation and low-grade infections can result in new periosteal bone formation. Chronic osteomyelitis with proliferative periostitis (traditionally termed $Garr{\acute{e}^{\prime}s$ sclerosing osteomyelitis) mainly affects children and young adults. Here, we present two rare cases of an 11-year-old and a 12-year-old patient with suppurative chronic osteomyelitis with proliferative periostitis without any definitive infection source, such as dental caries or periodontitis. The source of infection was likely to be related to the development of a lower right third molar germ with follicular space widening. Management involved antibiotics and the removal of the third molar germ and surgical debridement. Disease remission and a normal appearance was observed at the six-month follow-up visit.

• Korean Journal of Optics and Photonics
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• v.7 no.4
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• pp.322-327
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• 1996

Unlike holograms of real objects, holographic stereograms(HS) are made using a relatively small number of synthesized 2D images. The influence of aliasing artifacts caused by insufficient or improper sampling is presented, and a new sampling theory is proposed, which is used to making holographic stereograms. Also, the optical system for extension of viewing distance and viewing zone is proposed. Results of this analysis can be applied to design normal holographic stereograms and computer based holographic stereograms.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.363-366
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• 2005

When widening or repairing concrete deck slab, there is a joint inevitably. However, joining-construction method have following problem, that is the additional stress in existing part of bridge resulting from the specific process of joining-construction and the difference of amount of shrinkage between new and existing bridge. On this study, compared shrinkage stress of the direct joining construction method with the indirect joining construction method, and concluded the proper substitution rate of expansion cement. The rate of replacement was proper at $10\%$. but more than $15\%$, concrete had excessive expansion and weeker compressive strength. The time of placing closure concrete, considering the shinkage stresses and creep, was suitable in $45\~60$ days after placing the new concrete deck slab.

• KIEAE Journal
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• v.6 no.1
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• pp.47-55
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• 2006

In spite of the government policies and incentives to revitalize rural areas, we still have a lot of problems such as the environmental degradation in rural areas, widening gap in living conditions between urban and rural areas, and decreasing rural populations. This paper aims to suggest a new planning model for ecotourism based rural villages and develop a village revitalization plan for Jangwha-ri in Gangwha Island. The new model emphasizes sustainable development based on local indigenous resources and resident initiatives.

• KDI Journal of Economic Policy
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• v.38 no.4
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• pp.45-76
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• 2016

This paper measures the extent to which South Korea participated in global value chains (GVCs) from 1995 through 2011 and scrutinizes the consequences of such participation on the Korean economy. To this end, the World Input Output Database is utilized to calculate GVC income, GVC employment, and value-added exports created by Korean and foreign industries. Our findings show that Korea radically internationalized its production activities during the sample period, widening the gap between gross exports and value-added exports. We also document that Korea's participation in GVCs has changed the value-added and employment structures in domestic industries in accordance with their comparative advantages while exacerbating the degree of wage inequality.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1279-1282
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• 2003

The hydraulic pressure system can deliver strong power and control is easy so that it have been applied to the element technique of an each industrial field. Apply range is the actual circumstances to be more widening according to the automation plant and trend of the manufacture facilities. The hydraulic pressure system have been used since early times and it was universalized considerable in the industrialized country. Utilized to an automation device instrument wide at an each industrial spot and contributed the air space development which contribution make great strides for robotics and airospace departments. Our circuit design technology for the device structure are weak and in fact domestic is depending on the income though importance of the hydraulic pressure system.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.29 no.1
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• pp.41-43
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• 2018

"Saber-sheath" trachea is a deformity of lower cervical or intrathoracic trachea. The configuration of the deformity is marked coronal narrowing associated with sagittal widening. This deformity is associated with chronic obstructive pulmonary disease. We report a case of patient with saber-sheath who underwent total laryngectomy. Although the patient had no tracheal collapse after the total laryngectomy, crusted discharge was increased. Diagnosis of the saber-sheath trachea, possible causes, and clinical implications are discussed.