• Korean Journal of Child Studies
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• v.34 no.6
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• pp.31-55
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• 2013

This study aimed to look into the effect of sandplay therapy with parent-children on mother-child's attachment security and communication. This study first conducted a scale of attachment security targeting child and mother who is bringing children in the age of 5 to 6 years in two kindergartens located in Seodaemun-gu, Seoul, and composed experimental group and control group of four couples respectively by selecting randomly from eight mother-child couples that received low grades. Sandplay therapy with parent-children was conducted for 12weeks on a weekly basis for 50minutes each. To study the attachment security, we used the Klabsbrun-Bowlby(1976)' Separation Anxiety Test and Mother's attachment scale. In this study, it is Seperated in based on Lee Na Gueng(2001) by functional communication and dysfuctional communication in order to measure changes in communication for situation that may occur during Sand play theraphy and record of observation about changes in each session. Data logging makes watching videos that recorded parent-children sand play therapy every situations. When observes the functional communication or dysfunctional communication between mother and the child, checking the corresponding to each entries, the frequency is recorded and qualitatively analyzed by each sessions. To study mother and child have been enhanced stability of the attachment and the relationship had improved results. Also, in each session the observation of increased functional communication, and dysfunctional communication results appear to reduce in parent-children sand play therapy. As a result, a couple sand play therapy has positive impact to improved the relationship between the mother and the child.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.11
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• pp.33-44
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• 2018

During the course of play, children gain special experience in a place where they can explore their surrounding environment and feel emotional stability. This experience of attachment to the place of play is very important in that play can serve as a measurement of the child's growth and development. Therefore, the environment surrounding the child should be understood as a meaningful place that affects a child's life beyond the place of play. The purpose of this study is to propose a spatial planning method where the formation of place attachment is considered in the design of child care facilities, as this is where preschool children spend much of their early formative years. The research methods are as follow: First, we surveyed the relationship between child development and place attachment through literature reviews and found that the factors that form place attachment were summarized as accessibility, complexity, segmentation and nature friendliness. Second, we examined the spatial characteristics of Mitsuru Senda, a Japanese architect who has been intensively studying children's play environments, as well as the characteristics of children's play proposed by his academic research. Finally, we analyzed the relationship between the spatial characteristics supporting play shown in Senda's work, and the four factors of place attachment formation and proposed a planning method for space design applicable to child care facilities.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.548-553
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• 2002

Most tasks of the large vertical or ceiling structures have been carried out by human power. Those tasks require us much operation costs and times, safety devices, etc. So the need of automation for those tasks have been rising. That automation needs a wall-climbing mobile vehicle. Most former researches are things about attachment devices and moving mechanisms. A wall-climbing mobile vehicle must be designed by a method different from the case of the vehicle of the horizontal environment. That is because gravity acts as a negative role on the stability of a wall-climbing vehicle. In this thesis, the particular shape characteristics of a wall-climbing mobile vehicle are derived by the wall-environment modeling. In addition, some design constraints of the permanent magnetic wheel as an attachment device was studied. According to those requirements and constraints, one specific wall-climbing mobile vehicle was designed and some experiments were made on the attachment ability of that vehicle.

• Journal of the Korean Society of Industry Convergence
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• v.22 no.6
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• pp.807-819
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• 2019

In this paper, it is proposed a new approach to motion control and kinematics analysis of articulated manipulator attachment with five degree of freedom for excavator. Unlike the well-established theory for the control of linear systems, there is little general control theory relatively for a robust control of nonlinear systems. The control technique is essential for providing a stable and robust performance for application of articulated manipulator control. The proposed control algorithm is one of robust control methods based on error informations of the position and velocity error informations using stability analysis of dynamic model. Through simulation test, the proposed control scheme is illustrated to be a efficient control technique for real-time control.

• The Korean Journal of Food & Health Convergence
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• v.7 no.2
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• pp.11-24
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• 2021

This study identified the severity of youth gambling behavior and analyzed the impact of stress, impulsivity, peer attachment and social interest on youth gambling behavior. Based on the results of the study, the government sought to help understand teenagers who are addicted to gambling and to help them maintain psychological and social stability and healthy living. A total of 237 high school students were surveyed. According to the analysis, the prevalence rate was found to be 3.4 percent of the problem gambling group and 9.3 percent of the medium-risk gambling group, and a total of 12.7 percent was addiction. Low-risk gambling groups accounted for 16.9 percent and non-problem gambling groups accounted for 70.5 percent. By gender, male students have more serious gambling problems than female students. As a result of dividing the group that experienced gambling more than once and the group that did not experience gambling into gambling group and non-gambling group, the two groups showed significant differences in impulsiveness, avoidant attachment, and interest in others. Furthermore, a correlation analysis was conducted to examine the relationship between these factors and the level of gambling behavior, showing that only impulsivity was significant.

• The Journal of Korean Academy of Prosthodontics
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• v.57 no.3
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• pp.271-279
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• 2019

There are several unfavorable conditions regarding alveolar bone condition that may compromise the denture patient's satisfaction. Chewing efficiency may not be satisfactory when alveolar bone is deficient, and the denture stability could hardly be achieved when alveolar bone shape is irregular. Implant overdenture can be useful to provide satisfactory denture experience compared to conventional denture. The attachment for implant overdenture can be classified into bar attachment and solitary attachment. When the positions of the implants are in the mandibular anterior region, bar attachment may be favorable to obtain a rigid support of the entire denture. When implants are distributed both on anterior and posterior region, a solitary attachment could be considered for ease of removal and maintenance. This report presents implant overdenture cases with the patients that had unilateral mandibular alveolar bone atrophy conditions. Different abutments were chosen based on the individual patient's mandibular alveolar bone condition and the treatments were successful in terms of patient satisfaction.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.22 no.8
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• pp.784-790
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• 2012

This paper describes a stability and dynamic characteristics of bearingless helicopter main rotor in hover. Baseline rotor configuration is defined and modal analysis for the configuration is taken to verify the dynamic characteristics. The kinematic pitch-lag couplings through ways of pitch link installation are analyzed to know effects on loads, frequencies and stability. The effects of pitch link attachments in spanwise direction and chordwise direction as well as pitch link inclination on thrust, power, flpa-lag-pitch mode frequencies and inplane damping are examined. Pitch link at trailing edge location in chordwise direction has influence on aeroelastic stability of the rotor. Also, the pitch link with negative inclination angle makes inplane damping increase.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.394-399
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• 2012

This paper describes a stability and dynamic characteristics of bearingless helicopter main rotor in hover. Baseline rotor configuration is defined and modal analysis for the configuration is taken to verify the dynamic characteristics. The kinematic pitch-lag couplings through ways of pitch link installation are analyzed to know effects on loads, frequencies and stability. The effects of pitch link attachments in spanwise direction and chordwise direction as well as pitch link inclination on thrust, power, flpa-lag-pitch mode frequencies and inplane damping are examined. Pitch link at trailing edge location in chordwise direction has influence on aeroelastic stability of the rotor. Also, the pitch link with negative inclination angle makes inplane damping increase.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.658-659
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• 2014

• Journal of Dental Rehabilitation and Applied Science
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• v.31 no.4
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• pp.378-386
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• 2015

Overdenture has the advantage of improving the stability and retention of the denture but the abutment may be easily affected by caries or periodontal disease and the thin denture can be easily broken. The magnetic attachment overdenture has a high vertical retention but a low horizontal retention, thus, exerting a less disruptive force to the abutment or implant and shows less abrasion or damage compared to other mechanical retainers. Denture fractures in overdenture is caused by the thin denture base as the attachment is inserted, but it may also be caused by the difference in detrusion between soft tissue and hard tissue, and between an implant and a natural tooth. To compensate this shortcoming, a magnetic attachment with a silicone ball inserted in the magnet was developed as we report a successful case using this specific type of magnetic attachment overdenture.