• 보건교육건강증진학회지
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• 제5권2호
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• pp.90-109
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• 1988

This study was carried out to find the influencing factors on the acceptance of vaccination of viral hepatitis type B. Two groups of students, 362 undergraduates of Korea University were surveyed for research. The compliant group was 156 students who were inoculated with viral hepatitis type B shot more than one time. The non-compliant group was 206 students who were not inoculated. The measures used for this study were Multidimensional Health Locus of Control Scales and the one developed by the researcher on the basis of literature review about Health Belief Model. The results of this stuby were as follows. The awareness on health of the compliant group was higher than that of the non-compliant group(t=0.39, P<0.05), And perceived barrier of the compliant group was lower than that of the non-compliant group(t=0.35, P<0.05). But the knowledge about the viral hepatitis type B of the compliant group was lower than that of the non-compliant group(t=2.49, P<0.05). There were no differences between two groups in the perceived susceptibility of the hepatitis and the perceived benifit of the hepatitis vaccination. There was no difference between two groups in terms of the Inner Health Locus of Control (HLOC) and Chance HLOC. On the other hand Powerful-Others HLOC of the compliant group was higher than that of the non-compliant group(t=3.67, P<0.05). 'Parent's advice' was found to be the major answer to the motive of being vaccinated in the compliant group. This explains that the most influencial factor in determining one's health behavior is the parent's opinion. Answers to the question of the reason of not being vaccinated were, 'did not want to bother' and 'did not care yet' in order. As a whole, except for the awareness on health and the perceived barrier of the hepatitis vaccination, this study result shows disagreement with the past investigations on the inter-relationship between one's health belief or Health Locus of Control and the health behavior. The author of this study believes this was due to the limitation in the survey group's particular homogenity.

• 로봇학회논문지
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• 제9권4호
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• pp.225-231
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• 2014

Fish generates thrust with a compliant fin which is known to increase the efficiency. In this paper, the performance of a robotic dolphin, the velocity and the stability, was improved using an optimal compliant caudal fin under certain oscillating frequency. Optimal compliance of the caudal fin exists that maximizes the thrust at a certain oscillating frequency. Four different compliant fins were used to find the optimal compliance of the caudal fin at a certain frequency using the half-pi phase delay condition. The swimming results show that the optimal compliant fin increases the velocity of the robotic fish. The compliance of the caudal fin was also shown to improve the stability of the robotic fish. A reactive motion at the head of the robotic dolphin causes fluctuation of the caudal fin. This phenomenon increases with the oscillating frequency. However, compliant fin reduced this fluctuation and increased the stability.

• Structural Engineering and Mechanics
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• 제82권4호
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• pp.503-515
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• 2022

The multi-rigid-body matrix method (MRBMM) is a generalized modeling method for obtaining the displacements, forces, and dynamic characteristics of a compliant mechanism without performing inner-force analysis. The method discretizes a compliant mechanism of any type into flexure hinges and rigid bodies by implementing a multi-body mass-spring model using coordinate transformations in a matrix form. However, in this method, the deformations of bodies that are assumed to be rigid are inherently omitted. Consequently, it may yield erroneous results in certain mechanisms. In this paper, we present a multi-compliant-body matrix-method (MCBMM) that considers a rigid body as a compliant element, while retaining the generalized framework of the MRBMM. In the MCBMM, a rigid body in the MRBMM is segmented into a certain number of body nodes and flexure hinges. The proposed method was verified using two examples: the first (an XY positioning stage) demonstrated that the MCBMM outperforms the MRBMM in estimating the static deformation and dynamic mode. In the second example (a bridge-type displacement amplification mechanism), the MCBMM estimated the displacement amplification ratio more accurately than several previously proposed modeling methods.

• Journal of Periodontal and Implant Science
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• 제39권2호
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• pp.193-198
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• 2009

Purpose: The purpose of this study was to evaluate the compliance to maintenance schedules recommended supportive periodontal therapy(SPT) and to determine differences in the characteristics of compliant and non-compliant patients. Methods: 414 patients commencing SPT after active periodontal treatment from 2003 to 2005 were included in this study. Based on their compliance with the suggested maintenance schedule, patients were classified as compliant and non-compliant groups. Also patients classified by gender, age, degree of alveolar bone loss and treatment rendered. The association between compliance and patient characteristics was assessed by odds ratio in logistic regression analyses. Results: Only 47% of the initial patient was found to be compliant at the end of August 2008 and 20.8% patients were lost in the first year of SPT. There were significant differences between compliant and non-compliant regard to age, degree of alveolar bone loss and treatment rendered. Conclusions: In conclusion, compliance with SPT generally poor and patients who were older, treated surgical therapy and with mild alveolar bone loss are more compliant to SPT.

• 한국추진공학회지
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• 제20권1호
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• pp.8-13
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• 2016

연소충격완화부품은 폴리우레탄과 같은 완화소재를 사용하여 진동을 격리함으로써 추진기관이나 화공품 연소로 발생한 충격에 의해 로켓의 전자장비가 작동하지 않는 것을 방지하기 위해 사용한다. 연소충격완화부품의 성능은 굽힘 고유진동수와 전달률을 측정하여 판단할 수 있다. 본 연구를 통해 동일한 추진기관의 해외 연구결과를 통한 기준 모델의 실험 결과를 바탕으로 굽힘 고유진동수와 전달률에 대한 설계요구조건을 수립하였으며, 충분한 충격완화특성을 가지는 완화소재를 개발하여 새로운 로켓에 적합한 연소충격완화부품을 개발하였다. 본 연구는 완화소재 및 성능 측정 방법을 이용하여 연소충격완화부품을 개발하기 위해 사용할 수 있다.

• 한국생산제조학회지
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• 제23권5호
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• pp.421-427
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• 2014

In this paper, the kinestatic control algorithm using a six-axis compliant device is presented. Unlike the traditional control methods using a force/torque sensor with very limited compliance, this method employs a compliant device to provide sufficient compliance between an industrial robot and a rigid environment. This kinestatic control method is used to simply control the position of an industrial robot with twists of compensation, which can be decomposed into twists of compliance and twists of freedom. A simple design method of a six-axis parallel-type compliant device with a diagonal stiffness matrix is presented. A compliant device prototype and kinestatic control hardware system and programming were developed. The effectiveness of the kinestatic control algorithm was verified through two kinds of kinestatic control experiments.

• 제어로봇시스템학회논문지
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• 제15권9호
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• pp.881-886
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• 2009

This paper presents a manipulation system consisting of a coarse/fine XY positioning system and an out-of-plane manipulator. The object of the system is to conduct tine positioning and manipulation of micro parts. The fine stage and the out-of-plane manipulator have compliant mechanisms with flexure hinges, which are driven by stack-type piezoelectric elements. In the fine stage, the compliant mechanism plays the roles of motion guide and displacement amplification. The out-of-plane manipulator contains three piezo-driven compliant mechanisms for large working range and fine resolution. For large displacement, the compliant mechanism is implemented by a two-step displacement amplification mechanism. The compliant mechanisms are manufactured by wire electro-discharge machining for flexure hinges. Experiments demonstrate that the developed system is applicable to a fine positioning and fine manipulation of micro parts.

• International Journal of Naval Architecture and Ocean Engineering
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• 제3권4호
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• pp.242-253
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• 2011

Skin frictional drag reduction efficiency of "stiff" compliant coating was investigated in a wind tunnel experiment. Flat plate compliant coating inserts were installed in a wind tunnel and the measurements of skin frictional drag and velocity field were carried out. The compliant coatings with varying viscoelastic properties had been prepared using different composition. In order to optimize the coating thickness, the most important design parameter, the dynamic viscoelastic properties had been determined experimentally. The aging of the materials (variation of their properties) during half a year was documented as well. A design procedure proposed by Kulik et al. (2008) was applied to get an optimal value for the coating thickness. Along with the drag measurement using the strain balance, velocity and pressure were measured for different coatings. The compliant coatings with the thickness h = 7mm achieved 4~5% drag reduction within a velocity range 30~40 m/s. The drag reduction mechanism of the attenuation of turbulence velocity fluctuations due to the compliant coating was demonstrated. It is envisioned that larger drag reduction effect is obtainable at higher flow velocities for high speed trains and subsonic aircrafts.

• 로봇학회논문지
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• 제7권2호
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• pp.76-82
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• 2012

In this study, we aim to develop energy efficient walking and running robot with compliant leg. So, we propose the energy efficient locomotion control method. And, we experiment the proposed control method applying to the experimental robot with compliant leg. From the experiment, we look at whether the proposed control method can the robot walk and run energy efficiently.

• 한국정밀공학회지
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• 제22권3호
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• pp.61-67
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• 2005

A dynamic model for flexure hinge-based compliant mechanisms is derived. The dynamic model of the previous works do not well describe the behaviors of rigid bodies in the compliant mechanism when the length of the flexure hinge is long. In this study, the effect on the length of the flexure hinge is pointed out and then the dynamic model is derived to overcome the length effect. For verification, modal analyses are carried out using the proposed dynamic model and FEM (Finite Element Method). Finally they are compared by the terms of modal frequency. As the result, the proposed dynamic model can be used in design and analysis of the compliant mechanism.