• Archives of Reconstructive Microsurgery
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• v.22 no.2
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• pp.57-62
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• 2013

Purpose: The aim of this study is to report on the results and discuss the role of free flap followed by ipsilateral vascularized fibular transposition (IVFT) for reconstruction of large bone and soft tissue defect combined with infection by open tibia fracture. Materials and Methods: During the research period, lasting from December 2002 to June 2008 (Kyung Hee University Medical Center), data were collected from three patients who underwent IVFT after free flap. We analyzed the successiveness and persistency of the infection using free flapping, bone union, and hypertrophy between transposed fibula and tibia. Results: Regarding free flap, successive results were observed in all examples. In the final follow-up results, transposed fibulas all survived, having hypertrophy similar to that of adjacent tibia. Conclusion: Reconstruction of tibia defect with free flap followed by IVTF is a useful and safe method for avoidance of the potential risk of infection for patients with a large tibial bone defect and soft tissue defect associated with infection.

• Journal of the Korean Society of School Health
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• v.28 no.1
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• pp.22-30
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• 2015

Purpose: The purpose of this study is to survey on the influence of the laughing program on elementary school students' self-esteem and stress coping behaviors. Methods: In total, 43 children (grade 4~6 students) were recruited for self administered questionnaire. Questionnaire was composed of general characteristics, self-esteem, and stress coping behaviors. Ten week course of laughing program was scheduled to the Experimental group, meanwhile no program was given to the control group. Results: The median self-esteem scores in the experimental group was increased from 30.05 to 34 (Z=-2.375, p<.05). Meanwhile control group did not show significant change. The median inactive/avoidant coping scores in the experimental group was decreased from 10 to 9 (Z=-2.028, p<.05). Meanwhile control group did not show significant change in any items of stress coping behaviors. Conclusion: Laughing program may be helpful to improve stress coping behaviors through reducing inactive/avoidance coping as well as to strengthen self-esteem, especially among participants who had low self-esteem before the intervention.

• Clinics in Shoulder and Elbow
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• v.18 no.4
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• pp.269-271
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• 2015

Latissimus dorsi tendon transfer is a well-established method for treatment of irreparable posterosuperior rotator cuff tears. We report on an anterolateral mini-open technique with a porcine dermal patch augmentation for latissimus dorsi tendon transfer. Use of this technique would result in avoidance of deltoid damage by anterolateral mini-open approach and reduction of failure rate by patch augmentation.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.05a
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• pp.8-9
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• 2014

At the moment, construction industry has negative images such as faulty construction, 3D industry and corruption/bribe and they are being projected onto normal people and those engaged in the industry through various news media. Not only does this worsen the lack of skilled manpower by affecting high school students who will be responsible for the construction industry in the future but also makes the future of the industry uncertain by promoting the avoidance of industrial jobs. Therefore, this study suggested basic data for improving the images of construction industry by investigating interest and images of workers in the industry that high school students think as promising construction manpower, and extracting the present negative images through evaluation of associated images.

• Journal of Communications and Networks
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• v.15 no.5
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• pp.486-495
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• 2013

In this article, we suggest a two-dimensional genetic algorithm (GA) method that applies a cognitive radio (CR) decision engine which determines the optimal transmission parameters for multicarrier communication systems. Because a CR is capable of sensing the previous environmental communication information, CR decision engine plays the role of optimizing the individual transmission parameters. In order to obtain the allowable transmission power of multicarrier based CR system demands interference analysis a priori, for the sake of efficient optimization, a two-dimensionalGA structure is proposed in this paper which enhances the computational complexity. Combined with the fitness objective evaluation standard, we focus on two multi-objective optimization methods: The conventional GA applied with the multi-objective fitness approach and the non-dominated sorting GA with Pareto-optimal sorting fronts. After comparing the convergence performance of these algorithms, the transmission power of each subcarrier is proposed as non-interference emission with its optimal values in multicarrier based CR system.

• Journal of Mechanical Science and Technology
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• v.17 no.12
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• pp.1876-1885
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• 2003

The artificial potential field (APF) methods provide simple and efficient motion planners for practical purposes. However, these methods have a local minimum problem, which can trap an object before reaching its goal. The local minimum problem is sometimes inevitable when an object moves in unknown environments, because the object cannot predict local minima before it detects obstacles forming the local minima. The avoidance of local minima has been an active research topic in the potential field based path planing. In this study, we propose a new concept using a virtual obstacle to escape local minima that occur in local path planning. A virtual obstacle is located around local minima to repel an object from local minima. We also propose the discrete modeling method for the modeling of arbitrary shaped objects used in this approach. This modeling method is adaptable for real-time path planning because it is reliable and provides lower complexity.

• Korean Journal of Child Studies
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• v.26 no.4
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• pp.1-20
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• 2005

The present study investigated the effects of socio-drama for improving the self-esteem and self-expression of school children from broken homes. Twenty 4th and 5th grade children from broken homes were sampled from welfare service centers in the Seoul area. Participation was approved by at least one parent. Subjects were divided into two groups, 10 each in the experimental and the control groups. The socio-drama program, designed by the present researchers, was conducted in 12 sessions 90 minutes each, twice a week. Results showed that the self-esteem and the self-expression scoresof the experimental group increased significantly. Positive self-expression behaviors increased, while negative self-expressive behaviors and avoidance behaviors decreased in the experimental group.

• Journal of Families and Better Life
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• v.17 no.2
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• pp.43-54
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• 1999

This study examined the impact of attachment styles on the size and the level of functions of social networks. 270 mothers of school children responded to the questionnaire and were classified into secure avoidant and anxious attachment groups. Findings indicated that three continuous attachment indexes security avoidance anxiousness and the size and the level of functions of social networks were not affected by mother's age educational level and employment status. However singnificant attachment style effects were obtained for the size and the level of functions of social networks. Secure subjects perceived their husbands closer and more important and listed more nonkin members in their netoworks than anxious subjects. important and listed more nonkin members in their networks than anxious subjects Also secure people perceived receiving more assistance from network members including household tasks money information and advice Secure and anxious subjects reported more emotio al support from networks than avoidant people.

• International Journal of Automotive Technology
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• v.7 no.3
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• pp.251-259
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• 2006

For practical application on the HCCI engine, the solution of subjects, such as control of auto-ignition timing and avoidance of knocking, is indispensable. This study focused on the technique of controlling HCCI combustion appropriately, changing the mixture ratio of two kinds of fuel. Methane and DME/n-Butane were selected as fuels. The influences, which the mixing ratio of two fuels does to ignition timing, ignition temperature, rate of heat release and oxidation reaction process, were investigated by experiment with 4-stroke HCCI engine and numerical calculation with elementary reactions.

• Journal of the Semiconductor & Display Technology
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• v.18 no.4
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• pp.75-80
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• 2019

One of the most critical aspects of the smartphone industry is the quality of the cover. And the vibrations of machining center are supposed to be the most dominant factors to damage the cover quality. In this study, structure of a machining center has been analyzed through experiments and computer simulations to figure out the main reasons of the vibrations. And the design alterations based on the analysis were applied to identify the effects of those alterations on the vibration suppression. The result shows that the design alterations can effectively suppress about 90% of the vibrations.