• Proceedings of the KIEE Conference
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• 1998.11c
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• pp.932-934
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• 1998

In an electric substation, there are many sources of surge such as switching operations or lightning strokes. A grounding system submitted to such surge current presents very different behaviour from the observed under low frequency current. Especially, it has been reported that significant overvoltage occurs at the current feed-in point, and this may cause damages to other grounded components in the substation area. This paper describes the basic mechanism of improvement of grouding performance in transient state with auxiliary grounding grids.

• Annual Conference of KIPS
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• 2002.11c
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• pp.2285-2288
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• 2002

PDAs와 같은 휴대용 컴퓨터의 발전은 펜을 이용한 데이터 입력과 처리 기술에 대한 요구를 증가시키고 있다. 하지만 대부분의 PDAs용 애플리케이션들은 키보드와 마우스를 주된 입력 도구로 사용하는 데스크 탑 컴퓨터의 GUI와 입력 방식을 그대로 사용하고 있다. 본 논문에서는 펜 기반의 휴대용 컴퓨터에서 필기체 데이터 문서를 편집할 수 있도록 해주는 펜 제스쳐(pen gesture)기능 허용 텍스트 에디터를 개발하였다. 삽입, 삭제, 앞뒤 낱말 바꾸기, 줄 바꾸기 등의 제스쳐 인식 방법과 제스쳐 처리를 위해 스트록들(strokes)을 GCs(Gesture Components) 단위로 그룹화하기 위한 방법들을 제안하였다. 제스쳐 허용 에디터의 개발은 펜 기능만으로 문서 편집을 위한 모든 작업을 가능하게 해 줌으로 사용자의 편의를 극대화시켜 준다.

• Journal of Korean Academy of Nursing
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• v.26 no.1
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• pp.138-147
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• 1996

Although sensory deficits caused by stroke have been occasionally reported, dysfunctions of discriminative sensation have seldom been studied in patients with strokes. With the use of specifically designed methods, discriminative sensations including texture discrimination and position sense were tested in 67 patients with acute unilateral stroke. Thirty-two age and sex-matched healthy subjects were used as controls. Impaired discriminative sensation was common in patients with unilateral stroke (detected in 57 out of the 67 patients) regardless of the lesion location except for patients with lateral medullary stroke. Proprioceptive discriminative sensation remained intact in all except for three out of 25 patients who were initially diagnosed as having pure motor stroke on the bases of conventional sensory tests. However, tactile discriminative sensation remained intact in only 17 out of 25 patients. Discriminative sensory disturbances are common in patients with unilateral stroke even in those with intact sensory function on routine examination. The subtle disturbances of this sensation may explain, at least in part, the clumsiness of the patients that is not readily explained by conventional neurological tests.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2006.05a
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• pp.386-390
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• 2006

In this paper, kinematic analysis of a double-action link-type die set for the enclosed die forging is carried out. Operational principle of the die set in the enclosed die forging is introduced in detail. A closed form solution of the relative velocity of the middle plate with respect to the upper plate is given. The effect of link lengths on both strokes and velocities is investigated.

• Journal of the Korean Home Economics Association
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• v.27 no.2
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• pp.1-19
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• 1989

Dress is an expressive art form which involves a human activity; utilizes techniques under sufficient technical control that results in the production of typical forms on the basis of aesthetic standards. This study was conducted to clarify a relationship of Impressionism and it's image in dress-Bustle style. Artists such as Manet, Renoir, Cezanne, Gogh, Gauguin, and Rodin were reviewed. Impressionism was a method of painting that consists in repoducing an impression exactly as it is experienced from contemplation nature. The Impressionists used a technique of separate, fragmented brush strokes and pure prismatic colore, aiming at rendering changing effects of light. Fashion designers such as Charles Worth, Givency, Cardin, Ungaro, and Lacroix were examined. Throughout their fashions, they focused on the naturalism of feminine and seductive image-the touch of Vegetable Venus depicted on the paintings of Manet and Renoir; expressed "unmitigated sexiness" in various forms of Bustle sytle creating a seductive beauty, revealing body contour, breast and legs, and using a fragmented motif and flowers with vivid color.

• Transactions of The Korea Fluid Power Systems Society
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• v.7 no.1
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• pp.11-19
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• 2010

A gas-assisted hydraulic breaker uses both hydraulic and pneumatic energies and the appropriate balance between them mostly effects its performance. Mathematical modeling of the breaker is established and verified by experiment. Through sensitivity analysis using AMESim, the key design parameters are selected, which mostly affect the performance of the breaker. Taguchi method is used to optimize the key design parameters to maximize the output power for long and short strokes through simulation. As the result, the output power as well as the impact energy are increased significantly compared with the existing design. The pressure pulsation in the supply line is reduced to a tolerable level and the dynamic characteristics of the piston displacement is also improved by the optimization.

• Proceedings of the Korean Geotechical Society Conference
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• 2000.11a
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• pp.151-158
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• 2000

A database program, named SLOPMAN, was developed to collect all the information on the slopes with potential hazard around railroad and to setup the effective management system. SLOPMAN is composed of three modules: data control, search and analysis. The program is able to store both text and image data and operated with tabs for the users' ability and convenience. Drop-down menu is equipped to reduce errors and the number of key strokes when inputting data. Searching data is made by codes automatically given to slopes or key words. In the analysis module, RMR and SMR values can be obtained to estimate the stability of slopes.

• Proceedings of the KIEE Conference
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• 1989.07a
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• pp.443-446
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• 1989

154kV insulator strings are frequently damaged by lightning strokes, overvoltage and contamination. And this insulator damage inflicts a loss on the power company. The purpose of this paper is to develop the arcing horn as a protective device of 154kV insulator strings against lightning flashover and overvoltages. So We have developed the arcing horn which is suitable for 154kV transmission line and estimated the performance of arcing horn by high current arcs and high voltage tests.

• Journal of the Korea Computer Graphics Society
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• v.8 no.1
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• pp.21-28
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• 2002

This paper presents a brush stroke direction creation method to distill painterly expressions from picture images. In actual paintings, each brush stroke has the same directionality in one segmented area. but directionality changes in the area of image border edges. This study employed the following methods to implement the directionality of the brush stroke area by: (1) detecting edge in input images, (2) region splitting and merging based on quad-tree division method, and (3) composing a direction map to create brush strokes with the same directionality in the segmented area. The results of the implementation enabled the simulation of the directionality of the stroke area shown in actual paintings.

• Journal of Korean Public Health Nursing
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• v.27 no.1
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• pp.89-101
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• 2013

Purpose: The purpose of this study was to investigate the prevalence, characteristics, and factors related to falls occurring among the community-dwelling elderly. Methods: The subjects were 299 community-dwelling-elderly in Jeju Province. Data were collected via in-person interviews by five visiting nurses in October, 2012. Fall risk assessment tools developed by the CDC, K-ADL, HDS-K, and GDS were used for data collection. Results: A significant number of subjects (34.1%) had experienced a fall at least once within the last six months. Living arrangements, strokes, urinary incontinence, main daily activities, and depression were significant factors related to these falls. Other risk factors included heavy use of medications, difficulties in walking and standing, needing arms to stand up from a chair, and hearing loss. Conclusion: The results reveal critical factors related to falls among the community-dwelling elderly. These information should be used to develop and implement fall prevention programs in communities.