• 한국해안해양공학회지
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• 제3권3호
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• pp.163-169
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• 1991

불규칙 사면에서의 파랑변형을 분석하기 위해 파랑-흐름 복합수조에서 67 종류의 규칙파에 대한 실험을 실시하였다. 사면은 합판과 Angle을 이용하여 제작하였으며 경사는 1/10, 1/20이다. 균일한 경사면에서는 쇄파수심 지수, 파의 쳐오름 등은 기존의 실험 결과와 큰 차이가 없었으나, 심해 파랑경사가 작은 경우 이들의 값은 더 작았다. 또, 파의 쳐오름은 Hunt식과 잘 일치하였으며, 쇄파가 발생하는 횟수와도 관계가 있다. 사주가 있는 경우, 쇄파수심 지수는 기존의 식과 큰 차이가 있다. 쇄파후의 파고는 Dally 등(1984)의 이론식에 비해 작게 관측되었다.

• 천문학회지
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• 제26권1호
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• pp.33-45
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• 1993

We have conducted surface photometry of a spiral galaxy NGC4419, by making use of photographic plates in U, B, V and R-bands taken by 105cm Schmidt Camera at Kiso Observatory. Two dimensional surface brightness distributions as well as luminosity profiles along the major axis are examined in detail to decipher the morphological properties of the galaxy. Analysis of the color distributions of NGC4419 shows that B-V and U-B colors remain constant throughout the galaxy with a weak trend of blue bulge in B-V color. The blue bulge might indicate an active star formation in the nucleus of NGC4419. For a quantitative analysis of the luminosity distribution of NGC4419, the observed luminosity profiles are decomposed into bulge and disk components, assuming the bulge component to follow de Vaucouleurs $\gamma^{1/4}-law$ while the disk component is assumed to be exponential. The fitting generally fails at the central part and at the shoulder near r = 15' where bulge and disk components overlap. The failure at the central part cannot be attributed wholly by the seeing disk since the core-radius of the central plateau is much larger than the width of point spread function. The failure at shoulder could be due to the luminosities from the spiral arms.

• 대한조선학회논문집
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• 제38권4호
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• pp.48-55
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• 2001

본 논문에서는 선박 추진축계의 중간 축과 프로펠러 축 직경 변경시에 추진축계 고유진동특성을 효율적으로 산정하고, 선박 주기관 연속운항 금지구간 설정에 영향을 미치는 비틂공진점의 최적 설계를 도모할 수 있는 추진축계 종 비틂 연성 고유진동 감도해석방법을 제시하였다. 제시된 방법의 타당성과 효율성은 2척의 실선 추진축계을 대상으로 중간 축 프로펠러 축 직경에 대한 고유진동수 감도해석을 수행하여 검토하였다. 아울러, 선급 규정을 충족시키는 범위 안에서 중간축 및 프로펠러 축의 인장강도와 축경을 변화할 경우의 종 비틂 연성 고유진동수 변화량을 고찰하였다.

• 한국중재학회지:중재연구
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• 제12권2호
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• pp.115-151
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• 2003

As international trade and commerce increases among the nations in the world, it is inevitable fact that disputes rise as well. As these transactions grow more complex, it becomes increasingly important to resolve disputes and conflicts as quickly, efficiently and formatively as possible. In practical commercial affairs, we call a variety of international commercial troubles ‘trade claims’, Trade claims consist of disputes, controversies, or differences which may arise between the parties, out of, or in relation to, or in connection with their contracts, or for the breach thereof. Trade claim should be instituted promptly, otherwise it may be barred by prescription. Also, the other party will not accept the claim by reason of loss of evidence. In this connection, it should be noted that how long the claim prescription would continue. Trade claim should be settled reasonably and amicably between the parties concerned. And if both parties do not reach an agreement through their negotiation, then the claim shall be settled finally by binding arbitration. For the purpose of managing trade claim and arbitration, the trading parties insert in their contracts claim and arbitration clauses. This paper will examine some judicial precedents concerning claim clauses which are closely connected with a time limit of the claim It will also review some famous precedents rendered by the competent courts in connection with the wording, scope and implied renewal of arbitration clauses.

• 천문학회보
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• 제39권1호
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• pp.43.1-43.1
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• 2014

It has been suggested that only the most luminous AGNs ($L{\geq}$ [10] $^{45}L_{\odot}$ ) are triggered by galaxy mergers, while less luminous AGNs (L~ [10] $^{43}L_{\odot}$) are driven by other internal processes. Lack of merging features in low luminosity AGN host galaxies has been a main argument against the idea of merger triggering of low luminosity AGNs, but merging, especially a rather minor one, might still have played an important role in low luminosity AGNs since minor merging features in low luminosity are more difficult to identify than major merging features. Using SNUCAM on the 1.5m telescope at Madanak observatory, we obtained deep images of NGC 7743 which is a barred spiral galaxy classified as a Seyfert 2 AGN with a low bolometric luminosity of $5{\times}$ [10] $^{42}L_{\odot}$. Surprisingly, we newly discovered merging features around the galaxy, which indicate past merging activity on the galaxy. This example indicates the merging fraction of low luminosity AGNs may be much higher than previously thought, hinting the importance of galaxy merger even in low luminosity AGN.

• 천문학회보
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• 제41권1호
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• pp.39.3-39.3
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• 2016

About one tenth of dwarf elliptical galaxies found in the Virgo cluster have a disk component, and some of them even possess substructures such as bars, lens, and spiral arms. We use N-body simulations to study the formation of these non-axisymmetric features in disky dwarf elliptical galaxies. By mimicking VCC 856, a bulgeless dwarf galaxy with embedded faint spiral arms, we construct 11 sets of initial conditions with slight dynamical variations based on observational data. Our standard model starts slowly to form a bar at ~3 Gyr and then undergoes buckling instability that temporarily weakens the bar although the bar strength continues to grow afterward. We find 9 of our models are unstable to bar formation and undergo buckling instability. This suggests that disky dwarf elliptical galaxies are intrinsically unstable to form bars, accounting for a population of barred dwarf galaxies in the outskirts of the Virgo cluster. To understand the origin of the faint grand-design spiral arms, we additionally construct 6 sets of models that undergo tidal interactions with their neighbors. We find that faint spiral arms consistent with observations develop when tidal forcing is relatively weak although strong encounter still results in bar formation. We discuss our results in light of the dynamical evolution of dwarf elliptical galaxies including mergers.

• 천문학회보
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• 제39권1호
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• pp.40.1-40.1
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• 2014

We have classified barred galaxies for 418 RC3 sample galaxies within z < 0.01 from SDSS DR7 using the visual inspection, ellipse fitting method and Fourier analysis. We found the bar fraction to be ~60%, 43% and 70% for each method and that the ellipse fitting method tends to miss the bar when a large bulge hides the transition from bar to disk in early spirals. We also confirmed that the Fourier analysis cannot distinguish between a bar and spiral arm structure. These systematic difficulties may have produced the long-time controversy about bar fraction dependence on Hubble sequence, mass and color. We designed a new method to fine bars by analyzing the ratio map of bar strength in polar coordinates, which yields the bar fraction of ~27% and ~32% for SAB and SB, respectively. The consistency with visual inspection reaches around 70%, and roughly 90% of visual strong bar are classified as SAB and SB in our classification. Although our method also has a weakness that a large bulge lowers the value of bar strength, the missing bar fraction in early spirals is reduced to the level of ~1/4 compared to the ellipse fitting method. Our method can make up for the demerits of the previous automatic classifications and provide a quantitative bar classification that agrees with visual classification.

• 한국실내디자인학회논문집
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• 제27호
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• pp.120-127
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• 2001

The purpose of this study is to examine the characteristics of space design of Isamu Noguchi's works barred on the stage sets and environmental designs. From the end of 19th century, space which was begun to be studied about in architects has continued to be researched by not only scientists but artists. Recently, space Is expressed in free and new forms due to diversity of societies and advancement of technology, As a result, space has become an essential part in art and is used in the titles of many art exhibitions. This study scrutinizes space in Isamu Noguchi's works. No other 20th century artist has as clear and progressive space conception as Noguchi's. His notion of modern art was modified through space in the tradition of cubism and Russian Constructivism and Bauhaus. Combined with his experience in the traditional Japanese houses and gardens, these influences led toward a broadened conception of sculpture as the creation of living space. These modernist's characteristics are found in his early expression of stage sets for choreographer Martha Graham, and they would lead to a wide range of design activities, from gardens and interiors to fountains and furniture. Isamu Noguchi had created a body of work that crossed the boundary between fine and applied art as a sculptor, and as an environmental designer.

• 대한조선학회논문집
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• 제29권4호
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• pp.75-86
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• 1992

본 논문에서는 파랑중에서 소수선면 쌍동선(SWATH ship)의 저항증가에 관하여 해석적 및 실험적으로 다루었다. 여러가지 SWATH 모델들이 파고가 높아질수록 총저항이 정수중에서의 저항보다 적어진다는 특이한 현상들이 실험적으로 저자에 의해 보고되었다. 그 원인을 규명하기 위한 첫번째 단계로서 선형화된 3차원 diffraction 이론을 바탕으로 하여 SWATH선에 작용하는 1차 및 2차 힘들을 분석하였다. 또한 파랑중에서 SWATH선의 속도가 대응하는 단동선 및 다른 고속 선형에 비해 월등히 우세하다는 것을 보여준다.

• 한국어류학회지
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• 제26권2호
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• pp.139-142
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• 2014

제주도 북부 연안에서 채집된 학공치과 어류 1개체(표준체장 172.1 mm)를 근거로 Hemiramphus far를 한국미기록종으로 기재 보고한다. 본 종은 몸이 가늘고 긴 신장형으로 꼬리지느러미가 이차하고, 하악이 매우 길게 돌출되어 있는 점, 등지느러미와 뒷지느러미가 각각 13연조와 11연조로 이루어진 점, 등지느러미전방 비늘수가 36개인 점, 체색이 은백색이며 체측에 5개의 흑색 세로무늬가 있는 점, 하악 후단 봉합부, 등지느러미선단 및 꼬리지느러미 상엽 후단이 황색인 점이 특징적이다. 본 종의 신한국명으로, "검무늬학공치"를 제안한다.