• Journal of Korean Neurosurgical Society
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• 제47권4호
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• pp.310-312
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• 2010

A 51-year-old man presented with a pulsatile scalp mass over the right occipital region, which had increased in size over the previous 1 month. He had no previous history of head trauma. Three-dimensional computed tomography (3D-CT) angiography of the brain revealed a $3.0{\times}1.5\;cm$ occipital artery aneurysm arising from the occipital artery. The occipital artery aneurysm was removed following the ligation of the proximal and distal portion of the occipital artery aneurysm. The histological diagnosis was true aneurysm. To the best of our knowledge, this is the first reported case in the literature.

• Journal of Chest Surgery
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• 제14권3호
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• pp.235-240
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• 1981

A total of 102 patients who had an Open Heart Surgery from April 1976 to July 1981 were reviewed. 55 paeitnts were congenital heart disease and 47 patients were acquired heart disease. Among SS patients of congenital heart disease, 18 T 0 F, 18 V S D, 8 A S D, and each one case of l\ulcorner 0 R V, Truncus arteriosus, Ebstein anomaly, Single ventricle, P D A, P 5, A S D + P 5, E C D, V 5 D + P D A, A - P window, D C R V were noted respectively. In 47 patients of acquired heart disease and one Ebstein patient, 46 prosthetic values were implanted: 17 had M V R, 4 had A V R, 2 had M V R + A V R, and 4 had M V R + T V R and one T V R. The operative mortality was 8.S% in acquired heart disease and 17% in congenital heart disease. The follow up period was between 6 months and 6 years. There were 3 cases of late mortality in acquired heart disease and one case in congenital heart disease.

• Journal of Korean Neurosurgical Society
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• 제47권2호
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• pp.137-139
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• 2010

A subarachnoid hemorrhage (SAH) associated with negative finding on four-vessel angiography is seen in 5 to 30% of patients with intracranial SAH. A previously silent lesion in the spinal canal may be responsible for the angiographically negative finding for cause of intracranial SAH. We report a case of upper cervical (C1-2) intradural schwannoma presenting with acute intracranial SAH. Repeated cerebral angiographic studies were negative, but cervical magnetic resonance imaging study and tissue pathology revealed a intradural-extramedullary schwannoma in C1-2 level. This case illustrates the importance of a high index of clinical suspicion for spinal disease in angiographically negative intracranial SAH patients.

• BMB Reports
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• 제47권7호
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• pp.369-375
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• 2014

Pituitary adenylate cyclase-activating polypeptide (PACAP) is a pleiotropic bioactive peptide that was first isolated from an ovine hypothalamus in 1989. PACAP belongs to the secretin/glucagon/vasoactive intestinal polypeptide (VIP) superfamily. PACAP is widely distributed in the central and peripheral nervous systems and acts as a neurotransmitter, neuromodulator, and neurotrophic factor via three major receptors (PAC1, VPAC1, and VPAC2). Recent studies have shown a neuroprotective role of PACAP using in vitro and in vivo models. In this review, we briefly summarize the current findings on the neurotrophic and neuroprotective effects of PACAP in different brain injury models, such as cerebral ischemia, Parkinson's disease (PD), and Alzheimer's disease (AD). This review will provide information for the future development of therapeutic strategies in treatment of these neurodegenerative diseases.

• 무역학회지
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• 제47권5호
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• pp.305-319
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• 2022

The Chinese government has been promoting core industries in accordance with the 'Made in China 2025'. As a result of injecting huge subsidies to develop core industries, a great success has been achieved in the electric vehicle and battery industry, however, the semiconductor industry has almost no performance. This study aims to examine whether the subsidy policy of a developing country helps their own domestic firm to overcome the first mover advantage of an advanced country's firm. From the game theoretical analysis, the results have shown that the subsidy policy of the developing country's government creates the profits shifting effect which arises from the developed country's firm to the developing country's firm. When there exists R&D efficiency gap between the two firms, however, most of these profit shifting effects are offset, which implies that the subsidy policy of developing countries is likely to fail.

• 대한한방내과학회지
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• 제37권4호
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• pp.653-660
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• 2016

Objectives: The purpose of this study was to investigate the effects of Korean medicine on patients with idiopathic Parkinson’s disease.Methods: The charts of 47 patients diagnosed with idiopathic Parkinson’s disease in the Department of Internal Korean medicine, Stroke and Neurological Disorders Center, Kyung Hee University Hospital, Gangdong between August 2012 and July 2016 were reviewed. The Unified Parkinson’s disease rating scale (UPDRS) was administered before and after treatment with Korean medicine.Results: Thee average UPDRS Ⅱ+Ⅲ, UPDRS Ⅱ, and UPDRS Ⅲ of the 47 patients decreased significantly from 22.26±15.15, 10.19±7.53, and 12.06±8.35, respectively, pretreatment to 16.96±13.63, 7.47±6.44, and 9.49±7.73, respectively, post-treatment. The average postural instability and gait difficulty (PIGD), tremor, and bradykinesia also significantly improved post-treatment.Conclusions: These results provide evidence that Korean medicine can improve the activities of daily living and motor function of patients with idiopathic Parkinson’s disease. In particular, Korean medicine may be effective for the treatment of PIGD, tremor, and bradykinesia.

• 패션비즈니스
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• 제13권5호
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• pp.13-22
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• 2009

The purpose of this paper is to understand some methods to provide women's shoes and their design images from the 1920s to the 1940s, and to benefit from the new methods for creative design and new materials in the future. It also examined the features with the academic background of women's shoes. To target on analysis items and shoes design factors, moreover, it made reference to the paper by former research. As a result, 28 shoes (30.04%) in the 1920s, 47 shoes(51.09%) in the 1930s, and 17 shoes (18.47%) in the 1940s have been collected. The strap shoes, combination color, bright texture, and buckle trimmings are first on the list. The most popular shoes were pumps and strap, in terms of design and shape. In particular, black was one of the common and popular colors. Most of the shoes had buckles. Texture also was brilliant. This study was meaningful to provide understanding and information about a variety of women's shoes designs from the 1920s to the 1930s.

• Applied Science and Convergence Technology
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• 제26권3호
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• pp.47-49
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• 2017

Photocurrent enhancement has been investigated in monolayer (1L) $MoS_2$ with PbS quantum dots (QDs). A metal-semiconductor-metal (Au-1L $MoS_2$-Au) junction device is fabricated using a standard photolithography method. Considerably improved photo-electrical properties are obtained by coating PbS QDs on the Au-1L $MoS_2$-Au device. Time dependent photoconductivity and current-voltage characteristics are investigated. For the QDs-coated $MoS_2$ device, it is observed that the photocurrent is considerably enhanced and the decay life time becomes longer. We propose that carriers in QDs are excited and transferred to the $MoS_2$ channel under light illumination, improving the photocurrent of the 1L $MoS_2$ channel. Our experimental findings suggest that two-dimensional layered semiconductor materials combined with QDs could be used as building blocks for highly-sensitive optoelectronic detectors including radiation sensors.

• 한국표면공학회지
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• 제47권6호
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• pp.297-302
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• 2014

ZnS nanowires were synthesized in order to investigate $NO_2$ gas sensing properties. They were grown on the sapphire substrate using ZnS powders. SEM (scanning electron microscopy) showed the diameter and length of the ZnS nanowires were approximately in the range of 50 - 100 nm and a few $10s\;{\mu}m$, respectively. They were also found to be composed of Wurtzite- structured single crystals from TEM (transmission electron microscopy) analysis. $NO_2$ gas sensing performance of the ZnS nanowire was measured with electrical resistance changes caused by $NO_2$ gas with a concentration of 1-5ppm. The sensor was UV treated with an intensity of $1.2mW/cm^2$ to facilitate charge carrier transfer. The responses of the ZnS nanowires to the $NO_2$ gas at room temperature, treated with UV of two different wavelengths of 365 nm and 254 nm, are measured to be 124.53 - 206.87 % and 233.97 - 554.83%, respectively. In the current work, the effect of UV treatment on the gas sensing performance of the ZnS nanowires was studied. And the underlying mechanism for the electrical resistance changes of the ZnS nanowires by $NO_2$ gas was also discussed.

• Elastomers and Composites
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• 제47권4호
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• pp.355-363
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• 2012

2,2-Bis(3-amino-4-hydroxyphenyl)hexafluoropropane 와 방향족 디이미드-디카르복실산을 thionyl chloride, triethyl amine 및 NMP 하에서 직접 중축합하여 trifluoromethyl group을 포함하는 일련의 poly(hydroxyamide)s(PHAs)를 제조 하였다. PHAs은 $35^{\circ}C$ DMAc 용액에서 0.54-0.96 dL/g의 고유점도를 보였다. 모든 PHAs은 여러 종류의 유기용매에 쉽게 용해되었으나, PBOs은 황산에 부분적으로 용해되는 것을 제외하고, 전혀 용해되지 않았다. PHAs은 열적고리화 반응에 의해서 흡열과 함께 PBOs로 전환되었다. PHAs의 최대 중량손실온도는 $559-567^{\circ}C$의 영역을 보였고, poly(benzoxazole imide)s(PBOs)은 47-59%의 비교적 높은 char 수득율을 보였다. PBOs의 Pyrolysis Combustion Flow Calorimeter(PCFC) 결과에서 12-19 W/g의 HRR 과 2.7-3.6 kJ/g의 total HR을 보였다. PBO 1의 HRR은 PBO 3 의 HRR (19 W/g)보다 37 % 낮은 12 W/g의 가장 낮은 값을 보였다.