• 대한후두음성언어의학회지
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• 제10권1호
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• pp.12-16
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• 1999

Background and Objectives : The common cause of voice disorders may be bad habits of phonation. faulty vocal habits might aggravate the voice disorder or make the dysphonia. Authors thought the analysis of faulty vocal habits might help to evaluate the causes and to choose the treatment methods in patients with dysphonia. Authors studied to evaluate which vocal habits were used in patients with dysphonia. Materials and Methods : Patients with dysphonia(N= 32) and person without dysphonia(N=20) were evaluated through pre-evaluation test by otolaryngologist and SLP. All subjects were evaluated accordingly Posture of body, expansion of cervical vein, excessive movements of thyroide prominence, position of tongue, tension of lower lip, tension of jaw, breathing pattern related with phonation. Results : In dysphonia group, we found 23 cases with tension of jaw, 15 cases with expansion of cervical vein, 7 cases with bad position of tongue, 3 cases with excessive movement of thyroid prominence and a lot of cases with bad breathing Pattern on Phonation. In control group, only 3 cases with bad position of tongue, 2 cases with tension of lower lip, 1 case with tension of jaw were found. Conclusions : More faulty vocal habits were found in dysphonia group. Authors thought faulty vocal habits could be the cause of dysphonia and aggravate the dysphonia and the control of vocal habits would be very important in patients with dysphonia.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2005년도 학술발표회 논문집
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• pp.110-117
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• 2005

This paper deals the shaking table tests with 1/100 scaled model followed by Scott & Iai(1989)'s similitude law for OO dam main desging section to understand nonlinear behavior characteristics of concrete dam body by earthquake wave. As earthquake wave, Hachinohe and Elcentro waves were used and acceleration and displacements are measured to analyze behaviors of dam body. For ground maximum acceleration range ($0.3^{\sim}0.9g$), the results showed linear behavior regardless of ground maximum acceleration and secured safety of structure. To analyze the behavior of dam after tension cracking, 3cm-notch was placed at the critical section of over-flowing section. As results of applying Hachinohe wave(0.8g), Even though tension cracks were formed at over-flowing section by Hachinohe wave(0.8g), it showed that the dam is stable for supporting upper stream part of water tank of dam.

• Ocean Systems Engineering
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• 제8권3호
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• pp.345-360
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• 2018

Increasing demand for large-sized Floating, Storage and Regasification Units (FSRUs) for oil and gas industries led to the development of novel geometric form of Buoyant Leg Storage and Regasification Platform (BLSRP). Six buoyant legs support the deck and are placed symmetric with respect to wave direction. Circular deck is connected to buoyant legs using hinged joints, which restrain transfer of rotation from the legs to deck and vice-versa. Buoyant legs are connected to seabed using taut-moored system with high initial pretension, enabling rigid body motion in vertical plane. Encountered environmental loads induce dynamic tether tension variations, which in turn affect stability of the platform. Postulated failure cases, created by placing eccentric loads at different locations resulted in dynamic tether tension variation; chaotic nature of tension variation is also observed in few cases. A detailed numerical analysis is carried out for BLSRP using Mathieu equation of stability. Increase in the magnitude of eccentric load and its position influences fatigue life of tethers significantly. Fatigue life decreases with the increase in the amplitude of tension variation in tethers. Very low fatigue life of tethers under Mathieu instability proves the severity of instability.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집E
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• pp.241-246
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• 2001

Vortices terminating at free surface have been investigated extensively. Most of investigations, however, are focused on surface parallel vortices and little has been known about surface normal vortex or columnar vortex. Visualized experimental results utilizing LIF technique are discussed for the purpose of characterization of columnar vortex interacting with a clean and a contaminated free surfaces and a solid body interface in the present investigation. The results reveal that surface tension changes due to surface contamination although bulk viscosity remains constant and eventually the behavior of a columnar vortex interacting with a contaminated free surface and a solid body interface are totally different from the clean free surface case.

• 한국분무공학회지
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• 제6권2호
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• pp.29-36
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• 2001

Vortices terminating at free surface have been investigated extensively. however. are focused on surface parallel vortices and little has been known about surface normal vortex or columnar vortex. Visualized experimental results utilizing LlF technique are discussed for the purpose of characterization of columnar vortex interacting with a clean and a contaminated free surfaces and a solid body interface in the present investigation. The results reveal that surface tension changes due to surface contamination although bulk viscosity remains constant and eventually the behavior of a columnar vortex interacting with a contaminated free surface and a solid body interface are totally different from the clean free surface case.

• 대한조선학회논문집
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• 제28권2호
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• pp.104-117
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• 1991

자유표면을 가지는 유체에서 물체가 운동을 하게되면 물체와 자유표면의 교차점 주위에서 유제유동이 매우 급격해진다. 이 유동현상은 부유체의 운동에 따르는 유체유동, 탱크내에서의 슬로싱, 조파기 문제, 물체의 입수등 여러문제에서 발생된다. 이 유동은 교차점 주위에서 특이성을 가진다고 알려져 있었으나 Roberts(1987)는 물체의 운동이 충격운동이 아닐 경우에는 특이성이 존재하지 않는다는 것을 밝혔다. 본 논문에서는 표면장력을 고려하여 물체의 운동이 충격운동인 경우에도 특이성을 가지지 않는 해석해를 구하였고, 해의 특성을 조사하여 진동현상에 대한 임계치를 구하여 교차점에서 떨어진 거리가 이 임계치보다 작은 곳에서는 진동현상이 존재하지 않는다는 것을 밝혔다.

• 복식
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• 제56권1호
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• pp.121-130
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• 2006

Superimposition is a transforming technique that can facilitate the creation. Superimposition in previous studies, however, has only been fragmentary described as an expression technique, so the studies have not been conducted on the basis of its aesthetic value. The purpose of this study is to investigate how superimposition is applied and expressed in terms of forms of modern fashion based on multi-dimensional features of design processing. The codes of togetherness, ambivalence, sense of space and tension in dress were determined by using the expressional Superimposition. The forms of superimposition were limited to superimposition of clothing, superimposition of body and clothing and superimposition of body and Phenomenal body. This study found that superimposition has developed, in fashion forms/types, a new 'form' by overlapping various forms and thus provides a visual shock and a sense of mystery by using mismatched and arbitrary properties among the forms. Such a superimposition influences a methodology of fashion design through a designer's subjective tendencies, as well as influences a change in the view of the world. Also, a superimposition is expected to have a definite influence on new fashion trends.

• 대한기계학회논문집B
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• 제38권5호
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• pp.381-388
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• 2014

본 연구는 해상풍력발전을 위한 기초적인 연구로서 해상의 상태를 단순히 모사한 파랑에 의한 부유체의 시계열 및 주파수 거동의 특성을 파악하기 위하여 조파기를 구축하고 이의 타당성연구를 하고자 하였다. 소형의 조파수조에 모사된 여러 가지 파고 데이터를 검증하였으며, 단순한 부유형상을 제작하여 설치하고 이의 거동을 해석하였다. 부유체의 거동분석을 위해 하부체에 계류선을 설치 유무에 따라 그 거동특성도 관찰하였다. 부유체 거동을 가시화하기 위하여 부유체 내에 LED를 설치하여 고속카메라를 이용하여 촬영한 이미지를 해석하였다. 그 결과 부유체에 계류선이 설치된 경우 파랑에 의한 힘이 계류선으로 분산이 된다는 것을 알 수 있었다. 또한 부유체의 시계열 거동에 대한 스펙트럼 분석 결과 파랑의 주기가 길어질수록 피크값이 점차 감소한다는 것을 확인하였다.

• 한국해양공학회지
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• 제9권1호
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• pp.161-172
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• 1995

A numerical procedure is described fro predicting the motion and structural responses of tension leg platforms(TLPs) in waves. The developed numerical approach is based on a combination of a three dimensional source distribution method and the dynamic response analysis method, in which the superstructure of TLPs is assumed flexible instead of the rigid body assumption used in tow-step analysis method. Both the hydrodynamic interactions among TLP members, such as columns and pontoons, and the structural whole structure are formulated using element-fixed coordinate systems which have the origin at the node of the each hull element and move parallel to a space-fixed coordinate system. Numerical results are compared with the experimental and numerical ones, which are obtained in the literature, concerning the motion and structural responses of a TLP in waves. The results of comparison confirmed the validity of the proposed approach.

• 한국해양공학회지
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• 제7권1호
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• pp.133-146
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• 1993

A numerical procedure is described for predicting the motion and structural responses of tension leg platforms (TLPs) in waves. The developed numerical approach is based on combination of a three dimensional source distribution method and the dynamic response analysis method, in which the superstructure of TLPs is assumed flexible instead of the rigid body assumption used in usual two-step analysis method, proposed by Yoshida et. al. .The hydrodynamic interactions among TLP members, such as columms and pontoons, are included in the motion and structural analyses. Numerical results are compared with the experimental and numerical ones, which are obtained in the literature, of the motion and structural responses of a TLP in waves. The results of comparison confirmed the validity of the proposed approach.