• Journal of Korean Society of Coastal and Ocean Engineers
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• v.26 no.3
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• pp.149-159
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• 2014

In this study, we develop an algorithm to predict swell-like high waves on the east coast of Korea using the directional wave gauge which was installed near Sokcho. Using the numerical wave model SWAN, we estimate wave data in open sea from the wave data collected by using the directional wave gauge. Then, using the wave ray method and SWAN model with the open-sea wave data as offshore boundary conditions, we predict the swell-like high waves at several major points on the east coast of Korea. We verify the prediction methods with the SWAN and wave ray methods by comparing predicted data against measured one at Wangdolcho. We can improve the prediction of the swell-like high waves in the east sea of Korea using both the real-time wave measurement system and the present prediction algorithm.

• International Journal of Naval Architecture and Ocean Engineering
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• v.3 no.1
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• pp.27-36
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• 2011

In the proposed paper numerical calculations are carried out using two versions of a three-dimensional, timedomain panel method developed by the group of Prof. P. Sclavounos at MIT, i.e. the linear code SWAN2, enabling optionally the use of the instantaneous non-linear Froude-Krylov and hydrostatic forces and the fully non-linear SWAN4. The analytical results are compared with experimental results for three hull forms with increasing geometrical complexity, the Series 60, a reefer vessel with stern bulb and a modern fast ROPAX hull form with hollow bottom in the stern region. The details of the geometrical modeling of the hull forms are discussed. In addition, since SWAN4 does not support transom sterns, only the two versions of SWAN2 were evaluated over experimental results for the parent hull form of the NTUA double-chine, wide-transom, high-speed monohull series. The effect of speed on the numerical predictions was investigated. It is concluded that both versions of SWAN2 the linear and the one with the non-linear Froude-Krylov and hydrostatic forces provide a more robust tool for prediction of the dynamic response of the vessels than the non-linear SWAN4 code. In general, their results are close to what was expected on the basis of experience. Furthermore, the use of the option of non-linear Froude-Krylov and hydrostatic forces is beneficial for the accuracy of the predictions. The content of the paper is based on the Diploma thesis of the second author, supervised by the first one and further refined by the third one.

• Proceedings of the Korea Society of Costume Conference
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• 2004.10a
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• pp.100-101
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• 2004

• Journal of Navigation and Port Research
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• v.35 no.1
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• pp.45-49
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• 2011

The recent trend for numerical experiment requires more higher resolution and accuracy. Generally, in the wave field calculation, it starts with a large region formulation first and follows by a separated detailed region formulation by more denser grids for the main interest area considering the geographical and bathymetrical variation. The wave fields resulted from the large region calculation is being introduced into the detail region calculation as the incident waves. In this process there exists a problem of continuity. In order to get over such problem, method of variable gridding system or spectrum sampling, etc., is being used. However, it seems not enough to examine and analyze the related numerical errors. Therefore, it is investigated in this study the field applicability of the most pervasive use of wave model, the nested SWAN model. For this purpose, we made model experiment for two coastal harbours with different tidal environment, and compared and analyzed the result. From the analysis, it was found that both the extracted values, near the boundaries of the large and detail region and the nested formulation of SWAN model, show almost the same and no different between those with different tidal environment conditions. However it is necessary for reducing the numerical errors to set the boundaries for the detailed region outside of the rapid bathymetric change and deeper region.

• Journal of Veterinary Clinics
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• v.23 no.4
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• pp.472-475
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• 2006

Aspegillosis in free-living birds can be occurred mostly under poor weather and climate. But, captive birds tend to be more susceptible to infection and diagnosis was made usually at post mortem. A two months old Whooper swan(Cygnus c. cygmus) dying suddenly was found in a zoo without prior clinical signs. At necropsy, numerous well- demarcated yellow to white firm nodules were scattered throughout the air sacs and the lungs. Microscopically, granuloma formations were observed in the lung and air sacs. The margin of granuloma was surrounded by connective tissue barrier and was infiltrated with lymphocytes, and also observed giant cell near the granuloma. By Periodic acid Schiff reaction, hyphae were detected in granuloma of lung and air sacs. This case was diagnosed as an invasive pulmonary aspergillosis caused by Aspergillus fumigatus infection in a Whooper swan at a zoo.

• Korean Journal of Veterinary Service
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• v.37 no.2
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• pp.137-141
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• 2014

A captive mute swan (Cygnus olor) in the brooding period was found dead without any specific signs. On necropsy, the entire digestive tract was severely necrotized with loosely adherent pseudomembranes, and Clostridium perfringens (CP) colonies isolated from the intestinal contents were identified as CP type A by polymerase chain reaction. Microscopically, the intestine and the liver were necrotized and intralesional bacterial clusters were observed. In this case, there were no other mortalities, so the condition of a single bird, in particular, stress from incubation effort, could act as the predisposing factor for necrotic enteritis. In this study, we report a unique case of necrotic enteritis associated with incubation in a captive mute swan.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.129-131
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• 2009

최근 추세에 따라 수치실험은 높은 해상도와 정확도를 요구하고 있다. 일반적으로 파랑장 계산은 광역모형을 도입하고 연구영역에 대한 지형상태에 대한 분해능을 가지는 격자에 대하여 별도의 상세역의 모형을 구성하게 된다. 여기서, 세역의 입사파는 광역의 결과를 토대로 추출하게 되는데, 이 때 결과의 연속성에서 문체를 가지게 된다. 대체로 이러한 문제점을 극복하기 위하여 가변격자체계와 스펙트럼 추출 둥의 방법을 사용하게 되지만 여전히 수치적 오류는 계속되고 있는 실정이다. 따라서, 본 연구에서는 최근 가장 일반적으로 사용되고 있는 SWAN모형의 Nested 모형에 대한 적용성을 확인하고자 한다. 이를 위하여 각기 다른 조석환경하에 있는 두 개의 항에 대한 실험을 실시하고 이에 대한 결과를 비교 분석하였다. 분석결과, Nested 모형으로 구성된 광역과 세역 경계에서의 추출된 값이 거의 동일한 값을 가지며 각기 다른 조석환경하에서의 결과 또한 다르지 않다는 것을 확인하였다.

• Journal of Veterinary Clinics
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• v.41 no.2
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• pp.139-142
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• 2024

A wild Whooper swan (Cygnus Cygnus) with limping due to an injured left pelvic limb in an accident was rescued on the seashore and transferred to the Jeju Wildlife Rescue Center on November 23rd, 2020. On physical examination, its body condition score was 1 out of 5 due to starvation and dehydration. The left coxofemoral joint was also examined by careful palpating and estimating the damage. Moderated soft tissue swelling and crepitus surrounding the hip joint were confirmed. Radiography and computed tomography (CT) were used together for an accurate diagnosis of the joint. By radiographs readings, it was difficult to accurately confirm the condition of the proximal femur due to superimposition of the synsacrum and internal organs. However, signs such as avulsion fracture of the femoral head and a few fragments around the joint were revealed by CT imaging. Besides, through three-dimensional (3D) image analysis of CT, the dislocated area and condition of the left hip joint could be accurately and easily confirmed. The diagnostic process showing in this paper could be used as a good reference for diagnosing coxofemoral joint luxation in wild swan.

• Journal of the Korean Society of Costume
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• v.55 no.7 s.98
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• pp.62-75
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• 2005

This study is focused on main performers' stage costumes in the 'Swan Lake', a masterpiece of classical ballet, which Is newly represented by Matthew Bourne, a choreographer. The objectives of the study is to help understand a trend of costume in modern public performance and art. First, this paper is attempted to describe the concept and the elements of ballet costume, secondly, to consider the performance generally, and finally to analyze main performers stage costumes. This study was performed by two processes; The first was to visit theaters to view the performances in person: the classical ballet by the Bolshoi Theater Ballet, the performance by Korea national ballet academy and the Matthew Bonne's modernly redefined ballet. The second was to review the regarding literatures and DVD. There are two apparent characteristics of main performers' stage costumes in modern-style ballet compared with classic-style ballet. First, there is an approach to gender identity; the character of swan with the classic tutu that has been the culmination of femininity in the classic-style ballet, used to be represented in an established idea on ballet costume, is now substituted by a creative idea, male ballerina and trouser-style ballet costume. Second, there is an approach to breaking the convention on the purpose of emphasizing popularity arousing real sympathy and art value. Also, modern-style ballet introduces bare body and ffot rather than tutu and toe-shoes, and adapts items from casual outfit fitted in earh performer's character with a present-day life.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.6
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• pp.2329-2341
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• 2013

In this study, we develop an algorithm to predict swell-like significant waves in the east coast of Korea using the directional wave gauge which is installed near Sokcho. Using the numerical wave model SWAN, we estimate wave data in open sea from the wave data observed through the directional wave gauge. Then, using the wave ray method with the open-sea wave data as offshore boundary conditions, we predict the swell-like significant waves at several points in the east coast of Korea. We verify the prediction methods with the SWAN and wave ray methods by comparing numerically predicted data against either target or measured data at the observation site. We can improve the prediction of the swell-like significant waves in the east sea of Korea using both the real-time wave measurement system and the present prediction algorithm.