• Title/Summary/Keyword: Kyung Keun

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Hemifacial Spasm Developed after Contralateral Vertebral Artery Ligation

  • Choi, Hyuk-Jai;Lee, Sung-Ho;Choi, Seok-Keun;Rhee, Bong-Arm
    • Journal of Korean Neurosurgical Society
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    • v.51 no.1
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    • pp.59-61
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    • 2012
  • Although the mechanism of hemifacial spasm (HFS) is not yet well established, vascular compression of the facial nerve root exit zone and hyperexcitability of the facial nucleus have been suggested. We report a case of HFS in the setting of coinciding intracranial hemorrhage (ICH) of the pons and proximal ligation of the contralateral vertebral artery (VA) for the treatment of a fusiform aneurysm of the distal VA and discuss the possible etiologies of HFS in this patient. A 51-year-old male with an ICH of the pons was admitted to our hospital. Neuroimaging studies revealed an incidental fusiform aneurysm of the right VA distal to the origin of the posterior inferior cerebellar artery. Eight months after proximal ligation of the VA the patient presented with intermittent spasm of the left side of his face. Pre- and post-ligation magnetic resonance angiography revealed an enlarged diameter of the VA. The spasm completely disappeared after microvascular decompression.

Ameloblastic carcinoma of the mandible (하악에 발생된 법랑모세포 암종)

  • Kim Keun-Min;Hwang Eui-Hwan;Cho Jae-O;Lee Sang-Rae
    • Imaging Science in Dentistry
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    • v.31 no.2
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    • pp.109-115
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    • 2001
  • The ameloblastic carcinoma is an extremely rare, aggressive odontogenic neoplasm of the jaws. It is described as an ameloblastoma in which there is histologic evidence of malignancy in the primary or recurrent tumors, regardless of whether it has metastasized. We report an aggressive case of ameloblastic carcinoma of the mandible. A 68-year-old man with the complaint of the left facial swelling and intermittent pain was referred to our hospital. Serial images of panoramic radiograph, computed tomograph, and magnetic resonance imaging showed an ill-defined destructive radiolucent lesion of the left mandible. The lesion had typically aggressive behavior with extensive local destruction of bone and extended to the adjacent soft tissues. Bone scan revealed increased uptakes in the left mandibular body and ramus regions. Histological features were generally resembled with those of an ameloblastoma but with cytologic features of epithelial malignancy.

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Quality Characteristics of Duck Stock by the Addition of Malic Acid (사과산 첨가량에 따른 오리 육수의 품질 특성)

  • Kim, Ki-Bbeum;Kim, Dong-Suk;Song, Jung-Sik;Choi, Soo-Keun
    • Journal of the East Asian Society of Dietary Life
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    • v.21 no.2
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    • pp.263-271
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    • 2011
  • This study was performed to develop duck stock using various nutritional elements in duck bone by the addition of malic acid (0.5%, 1.0%, 1.5% and 2.0%). Moisture contents, b value, and pH were decreased, while the L value, a value, salinity, and sugar contents were increased by increasing the ratio of malic acid. Thirty four types of free amino acid were detected, and the highest individual amino acid content was 1.0%. In a test for different attributes, malic acid content significantly affected properties including color intensity, transparency, acid flavor, savory flavor, acid taste, and savory taste. In the acceptance test, a malic content of 1.0% was preferred for appearance, taste, and overall quality. The optimal malic acid content for maximizing the overall quality of duck stock was 1.0%.

Approximating the Outage Probability of the Pilot Channel for IS-95-Based Cellular CDMA Systems in the Soft Handover Region

  • Park, Seung-Keun;Cho, Pyung-Dong;Park, Ki-Shik;Cho, Kyung-Rok
    • ETRI Journal
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    • v.25 no.6
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    • pp.523-526
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    • 2003
  • This letter presents an approximation of the outage probability of the pilot channel that can be used for CDMA cell planning. The approximation can determine system parameters for soft handover in IS-95-based cellular CDMA downlink design. Computer simulations show that our analytical results agree with empirical results.

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