• Journal of Korean Neurosurgical Society
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• v.48 no.2
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• pp.153-156
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• 2010

The authors present a rare case of clear cell ependymoma that developed in the cauda equina. A 54-year-old man was admitted to hospital with intermittent lower back pain. A neurological examination conducted on admission revealed no sensory or motor disturbance. Deep tendon reflexes in both lower extremities were normal. Magnetic resonance images demonstrated a 1.0 cm-sized intradural mass at the filum terminale. Gross total resection was performed via total laminectomy of L1 and L2. The tumor was confirmed to be clear cell ependymoma by histopathologic examination. His symptom was relieved after surgery.

• Journal of Korean Neurosurgical Society
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• v.49 no.1
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• pp.71-74
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• 2011

A 34-year-old female patient was presented with leg and hip pain for 6 months as well as voiding difficulty for 1 year. Magnetic resonance imaging revealed a well-demarcated mass lesion at L2-3. The mass was hypo-intense on T1- and T2-weighted images with homogeneous gadolinium enhancement. Surgery was performed with the presumptive diagnosis of intradural extramedullary meningioma. Complete tumor removal was possible due to lack of dural adhesion of the tumor. Histologic diagnosis was clear cell meningioma, a rare and newly included World Health Organization classification of meningioma usually affecting younger patients. During postoperative 2 years, the patient has shown no evidence of recurrence. We report a rare case of cauda equina clear cell meningioma without any dural attachment.

• The Journal of the Korean dental association
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• v.54 no.7
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• pp.542-550
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• 2016

Recent technological advance have greatly expanded the application of invisible orthodontic treatment using clear thermoplastic materials. However, the final outcomes using clear aligner system do not achieve the level of final goal frequently, which results in case refinement, midcourse correction, or fixed orthodontic treatment. Therefore, mechanical properties of thermoplastic materials should be considered to improve the quality of outcomes. The purposes of this special article were to evaluate the force and stress depending on the materials, deflection and thickness of thermoplastic materials and to evaluate the mechanical properties of thermoplastic materials after repeated loading. Thickness and amount of deflection rather than products and materials showed the largest effect on force and stress. In all products, at least 159 gf of force was required for more than 1.0 mm deflection or when materials with 1.0 mm thickness were deflected. Orthodontic forces delivered by thermoplastic materials depend on the materials, thickness, amount of activation, and intra-oral condition. Proper thickness of thermoplastic materials and deflection level of tooth movement should be decided for the efficient and physiologic tooth movement.

• Journal of Yeungnam Medical Science
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• v.32 no.2
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• pp.111-113
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• 2015

Clear cell acanthoma (CCA) is an asymptomatic benign lesion of unknown origin that typically appears as a brownish, dome-shaped papule on the leg. It has an unusual clinical feature in that it appears as chronic eczema, Bowen disease, or Paget disease on the areola. Its histopathologic findings are well-demarcated psoriasiform acanthosis with pale keratinocytes (clear cells) that are rich in intracellular glycogen, which stain positively with Periodic acid-Shiff. We report herein on a young female patient with CCA on the areolar areas.

• Journal of the Korean Society of Food Culture
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• v.31 no.1
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• pp.42-50
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• 2016

Traditionally, food and medicines are considered as having common roots. That is, their energies share the same source (藥食同源), which has created a unique food culture, and nurtured a unique academic area of dietary medicine (藥膳食料學). This study aimed to develop a desirable dietary life-style based on the oriental dietary medicine theorem originated from the schema of four qi as well as five flavors of foods (四氣五味), originated from the yin-yang and five phase theory based on a clear understanding of a modern point of view, and experimental analysis of nutrients and dietary effects of clear heat effect materials. This study can promote more healthy life-styles and prevent adult diseases by following oriental dietary medicine theory. We should develop a Yack-sun theory and dietary culture that is suitable for physical and genetic health.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.11 no.1
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• pp.93-101
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• 2000

In this paper, propagation characteristics are analyzed under the Korean propagation condition based on the measurements for Ka-band beacon signal of COMET satellite which moves in non-geostationary orbit. Radio propagation characteristics varying as time, range, and elevation angle are presented also. As results, it is concluded that free space loss is a major parameter to the radio propagation characteristics varying as a range in clear sky. In addition, the effect of elevation angle is negligible because COMETS is observed above 40 degree.

• Investigative Magnetic Resonance Imaging
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• v.20 no.2
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• pp.136-139
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• 2016

Clear cell sarcoma is rare and difficult to diagnose. Herein, we present a case of clear cell sarcoma in the dorsum of the wrist with MRI findings, including diffusion-weighted imaging, and histopathologic correlation, which was initially diagnosed as giant cell tumor of tendon sheath.

• Speech Sciences
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• v.13 no.3
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• pp.107-117
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• 2006

This study examined how well Korean undergraduate students perceived linked or clear English speech and attempted to find areas of difficulty in their English listening caused by phonological variations. Thirty nine undergraduate students participated in listening sessions. They were divided into high and low groups by their TOEIC listening scores. Samples of linked speech included such phonological processes as linking, palatalization, flapping, and deletion. Results showed that the students had more problem perceiving linked speech than perceiving clear speech. Secondly, both the higher and the lower groups scored low on the linked speech. The lower group had more score difference between linked and clear speech. Thirdly, the students' scores increased from the speech with flapping, through deletion, palatalization, to linking. Finally, there was a strong positive correlation between their TOEIC listening scores and the perception scores. Further studies would be desirable on the level of improvement of TOEIC scores by training the students' listening ability using the linked speech.

• Archives of Plastic Surgery
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• v.34 no.4
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• pp.512-515
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• 2007

Purpose: Clear cell hidradenoma, now regarded as an eccrine sweat gland tumor on the basis of its enzyme histochemical and electron microscopic features, occurs as a solitary tumor in most instances. Methods: A 17 year old male presented with asymptomatic nodule, which had developed on nipple with a four years of history and total excision and purse-string suture was then performed. Results: No recurrence was observed 2 months after excision. Histologically, it showed a well circumscribed tumor composed of characteristic clear epithelial cells which are focally arranged in glandular patterns. Conclusion: This case is unique in that the tumor developed on the young male nipple, unusual site and this report emphasizes the benefit of local excision to prevent recurrence of these tumor.

• Proceedings of the SCSK Conference
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• 2003.09a
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• pp.374-386
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• 2003

Two ways of making clear emulsions\ulcornerMicroemulsion Visible light λ = 400-700 nm Microemulsion, d < 50 nmㆍRefractive Index Matching(omitted)