• Archives of Reconstructive Microsurgery
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• 제6권1호
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• pp.111-116
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• 1997

The treatment of chronic digital pain and cold intolerance due to Raynaud's phenomenon is quite difficult especially it is combined with scleroderma. Several surgical trial such as cervicothoracic sympathectomy have been attempted for the medically unresponsible Raynaud's phenomenon, but their results were unsatisfactory. We have tried peripheral periarterial sympathectomy for the 44 years old female patient who had medically unresponsible severe Raynaud's phenomenon with scleroderma. Periarterial adventitial stripping was performed at the level of wrist, superficial palmar arch, common digital artery and proper digital artery about 1.5-2 cm in length. Preoperative angiography and radioactive angiography were done and preoperatively and postoperatively the blood flow was measured by the desk top computer-aided histogram. Both hands digital pain were markedly reduced after operation and blood flow increased as compaired with the preoperative measure.

• 분석과 대안
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• 제6권1호
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• pp.259-282
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• 2022

本文关注到与过去不同的新常态下 '新东北现象' 的复合特征,着重阐述最近 '新东北现象' 里的主要三个现象-经济现象, 人口现象, 财政现象。2014年以来东北地区经济增速减缓虽成大问题,同其间东北有关人口状况与财政支出结构变动也很突出。总之, 2014年以后在东北地区, 经济增长衰退, 人口减少与人才流失加剧, 老龄化提速, 财政收支缺口增加与社会保障支出激增, 这些现象都同时发生, 互相影响着产生恶性循环, 新常态下的 '新东北现象' 之难点就在这复合实质。那么, 新常态下的 '新东北现象' 之如此复合特征与难点给全中国何含意? 本文提出两点。第一, 基于近来中国一些有关状况变化趋势来看, 东北可以被视为中国的一个缩影, 新常态下的 '新东北现象' 不限于东北地区, 不久将来很可能扩散到中国其他区域, 会成为全中国现象。第二, 新常态下的 '新东北现象' 出现, 对于改革开发以来实行的西部大开发战略, 中部崛起战略, 东北振兴战略等一系列区域大开发战略的根本性效果, 要求深刻的反思且重新构想。这些区域发展战略, 虽有所成就, 中西部地区, 尤其是西部, 还仍然相对很落后, 中国区域差距一向没有缩小。振兴东北战略实行已有了20来年, 新常态下的 '新东北现象' 出现也显示长期以来困扰东北经济的深层次问题始终没有得到解决。近来习进平格外强调 '共同富裕', '新东北现象' 也成为本届中央政府最急切解决的问题之一, 如果成功了, 既能为重新构思和调整区域发展战略提出有效方向, 又能为对应未来中国经济社会变动成为一个重要标志。

• KIEAE Journal
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• 제8권2호
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• pp.47-52
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• 2008

A nations' cultural heritage embodies its intellectual and spiritual contributions to its civilization of mankind. Cultural properties, whether tangible or intangible, represent both the essence and the basis of national cultures. Both the Philippines and South Korea's cultural heritages have survived various unfortunate chapters of their long histories. This study's purpose is to explore and evaluate the phenomenon of the architecture of Hahoe village in Andong city, Korea and Vigan city of Ilocos Sur, Philippines and to understand and cherish the cultural heritage of both countries. The historic city of Vigan has a unique architecture that blend Ilocano, Filipino, Chinese and Spanish styles in a tropical Asian setting, with a typical Spanish colonial urban layout as specified by the Ley Delas Indias. Hahoe village also represents a masterpiece of human creation and exhibit an important interchange of human values in architecture, monumental arts, town planning and landscape design. Though diverse in milieu, Hahoe village and Vigan city share a common phenomenon which is architecture that is called cultural heritage.

• Asia pacific journal of information systems
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• 제29권1호
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• pp.117-143
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• 2019

Advances in information technology (IT) bring about technological innovation in financial businesses, referred to as financial technology (fintech), beyond the traditional financial industry. While fintech implies more convenient and various financial services to customers, it leads to more complexity in the financial sector, as different industry players (e.g., IT firms) can participate in financial businesses. The complexity of fintech causes controversial issues related to policies and the appropriate development direction. In order to provide insight into the current state of fintech, this study explores the fundamental understanding of the fintech phenomenon from the perspective of the major stakeholders (i.e., financial authorities, financial companies, IT firms) in South Korea. This study analyzed news articles, where those stakeholders expressed their arguments, by using a content analysis. The study also conducted an intensive examination of their arguments by using a core-periphery approach of social representations. This study found that while the three beholders had a common opinion on deregulation of the fintech industry, each of them had different knowledge of the phenomenon. By revealing each beholder's structure of representations of fintech, this study not only provides common knowledge regarding fintech but also explicates the perceptual gaps among stakeholders. Findings of the study offer a big picture of current fintech initiatives, which can be useful knowledge for future research on fintech.

• Journal of Mechanical Science and Technology
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• 제14권11호
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• pp.1250-1256
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• 2000

Rubbing occurs when a rotor contacts with a stator during whirling motion of the rotor. Compared to full annular rub, partial rub against a nonrotating part is more common in practice. In this study, several partial rubbing phenomena of superharmonic and subharmonic vibrations and jump phenomenon are demonstrated experimentally for the cases of light and heavy rub for a flexible rotor. The orbit patterns of forward or backward whirling are also calculated using directional spectrum analysis. The occurrence if subharmonic vibration during heavy rub is demonstrated as one impact per two rotations both experimentally and numerically.

• 대한전기학회논문지
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• 제38권1호
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• pp.60-67
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• 1989

In this paper, a methodology is developed to remove the high frequency chattering phenomenon which is the common drawbacks of variable structure control(VSC) system. An improved control law is proposed to achieve continuous control input whose terms are continuous functions during the control process under switching plane, which removes chattering and is robust as well. The methodology developed in this paper is applied to attitude control for spacecraft and the simulated results are compared with those of typical VSC methodology.

• Annals of Clinical Neurophysiology
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• 제8권2호
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• pp.171-173
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• 2006

Marcus Gunn jaw winking phenomenon has been thought to result from a congenitally abnormal innervation of the levator palpaebrae muscle by a branch of the trigeminal nerve. A 22-year old man presented with bilateral eyelid elevation on the chewing or eating since infancy. Neurological examination showed bilateral Marcus Gunn Jaw wingking phenomenon in this patient. We referred this patient to the department of ophthalmology and plastic surgery for levator resection or orbicularis oculi muscle flap. We report bilateral Marcus Gunn jaw winking phenomenon, although unilateral disorder is the most common form of trigemino-oculomotor synkinesis. Neurologists should be aware of this phenomenon for decision of proper management and take detailed neurologic examination for elucidating the association of other cranial nerves.

• 대한기계학회논문집
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• 제18권6호
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• pp.1439-1447
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• 1994

Test results of friction-factor for the flow of air in a narrow channel lined with various honeycomb geometries show that, generally, the friction-factor is nearly constant or slightly decreases as the Reynolds number(or Mach number) increases, a characteristic common to turbulent flow in pipes. However, in some test geometries this trend is remarkably different. The friction factor dramatically drops and then rises as the Mach number increases. This phenomenon can be characterized as a "friction-factor jump." Further investigations of the acoustic spectrum indicate that the "friction-factor jump" phenomenon is accompanied by an onset of a normal mode resonance excited coherent flow fluctuation structure, which occurs at Reynolds number of the order of $10^4$. New empirical friction-factor model for "friction-factor jump" cases is developed as a function of Mach number and local pressure.ach number and local pressure.

• Journal of Mechanical Science and Technology
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• 제15권12호
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• pp.1630-1638
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• 2001

Partial rotor rub occurs when an obstacle on the stator of a rotating machinery disturbs the free whirling motion of the rotor, which is more common than full annular rub among the cases of rubbing in rotating machinery. The intermittent contacts and friction during partial rotor rub makes the phenomenon complex. The several nonlinear phenomena of superharmonics, subharmonics, and jump phenomenon are demonstrated for the partial rub using an experimental apparatus in this study. The orbit patterns are also measured experimentally. In order to explain the phenomena of partial rotor rub, the analytical model for the contact between the rotor and stator should be chosen carefully. In this respect, a piecewise-linear model and a rebound model using the coefficient of restitution are investigated on the basis of the experimental observations. Also, Numerical simulations for the two models of contact are done for the various system parameters of clearance, contact stiffness, and friction coefficient. The results show that the piecewise-linear model for partial rotor rub is more plausible to explain the experimental observgations.

• Journal of Advanced Marine Engineering and Technology
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• 제33권4호
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• pp.502-508
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• 2009

To obtain high power, diesel engines continuously increase combustion pressure and mean effective pressure each cylinder, and the excitation sources and noisy sources are increased, too. Moreover, to reduce the costs, shipyards make hull structures weaker than before. As above reasons, it is more difficult to control the vibration phenomenon nowadays. In this study, it was investigated why diesel generator sets reached the vibration allowable limits during the FAT and heavy vibration phenomenon of diesel generator sets using ODS test during onboard tests. Also, it is found out the stiffness of deck and common bed using the test result of their structural impedance. To find out the vibratory characteristics of diesel generator sets, model tests were carried out. From the sensitivity analysis after above tests, it was selected points to be reinforced and studied troubleshooting to solve heavy vibration phenomenon of diesel generator sets.