• 한국정보통신학회논문지
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• 제8권5호
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• pp.1020-1027
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• 2004

기존의 2D 패션 디자인 시스템은 도식화 피스 기반 디자인 기능이 미성숙 단계로서 도식화 피스데이터베이스 구축이 미약하여 활용하는데 많은 한계를 가지고 있다. 본 논문에서는 패션디자인에 필요한 가장 기본이 되는 도식화 피스별 데이터베이스를 설계 및 구축하고 데이터베이스 검색 및 수정 모듈을 개발함으로써 도식화 피스 데이터를 쉽게 관리하여 경쟁력 있고 효율적인 디자인을 창출할 수 있게 하였다.

• 대한치과교정학회지
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• 제30권4호
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• pp.377-386
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• 2000

경미하거나 중등도의 골격성 비대칭을 동반한 치열 정중선 불일치를 치료할 때 진단시 간과한 경우 교정치료의 마무리시기에 발견하여 치료기간이 더 길어지거나 만족스럽지 못한 결과를 초래하게 된다. 이때 비대칭 악간 고무줄을 사용한 통상적인 방법으로 장기간 치료하면 교합평면이 변화되거나 치아가 경사 이동되는 등 여러 가지 부작용들이 발생할 수 있다. 이를 예방하기 위해 초진시부터 세심한 진단과 정확한 역학의 적용이 필요하다. Dr. Burstone이 제안한 three-piece basal archwire는 posterior anchorage unit, anterior segment와 intrusion arch 로 구성된다. Three-piece basal archwire는 전치부 함입과 후방견인을 동시에 도모할 수 있으며, 기울어진 전치부 교합평면의 개선도 가능하다. 편측으로만 견인력을 적용하여 치열 정중선을 개선할 때 절치가 경사이동되는 것을 방지하기 위해 Three-piece basal archwire를 응용하여 견인하는 방향의 반대측에 모멘트를 부가하면 절치의 편측 치체 이동을 도모할 수 있다. 이러한 방법으로 치열 정중선 불일치를 개선한 치료 증례를 살펴보고자 한다.

• 한국안전학회지
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• 제20권3호
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• pp.34-41
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• 2005

For assessing residual lift of the steam pipe in fossil power plants, inspections and analysis are usually focused on the critical locations such as butt welds, elbows, Y-piece and T-piece of the steam pipes. In predicting the residual life of T-piece, determination of local stress near welds considering system load as well as internal pressure is not a simple problem. In this study, stress analysis of a T-piece pipe was conducted using a three-dimensional model which represents the T-piece of a domestic fossil power station. Elastic and elastic-creep analysis showed the maximum stress level and its location. Residual creep rupture life was also calculated using the stress analysis results. It was argued that the calculated life is reasonably same as the measured one. The stress analysis results also support life prediction methodology based on in-field replication technique.

• Journal of the Korean Statistical Society
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• 제17권1호
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• pp.46-55
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• 1988

Two-piece double exponential distribution (TPDE) with one piece $(X \leq 0)$ having the scale parameter $\theta_1$ while the other piece (X>0) having $\theta_2$ is considered here. Distribution of the sum of n-independent variables from such a distribution is obtained. Special cases of this distribution are also treated. Next, distribution of the ratio of two independent (TPDE) variables is derived. As an extension, distribution of $x_1/x_2x_3$ is expressed terms of hypergeometric functions. A small table gives the power of the test regarding double exponential against (TPDE).

• 대한가정학회지
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• 제44권9호
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• pp.31-39
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• 2006

This study was conducted to reproduce the two-piece sleeve pattern of the ladies' jacket of the 1890's for Korean women of the twenties who have the standard body type and the average size. Fourteen two-piece sleeve patterns of the ladies 'jacket of the 1890's were collected and drawn to actual size. The length and width proportion of the upper-sleeve and under-sleeve pattern of the ladies' jacket of the 1890's were similar to the two-piece sleeve pattern of jacket which we see now. The elbow line of the two-piece sleeve pattern of the ladies' jacket of the 1890's was lower than the two-piece sleeve of jacket of today. The cap of the sleeve of the ladies' jacket of the 1890's was gathered and this gave volume to the upper part of sleeve but the lower part of the sleeve was tight. The study pattern of two-piece sleeve pattern which had the characteristics of the sleeve pattern of the ladies' jacket of the 1890's was designed like for Korean women of the twenties who have the standard body type and the average size through modifications based on the evaluation of dressing on two occasions. The study pattern was evaluated to have the silhouette of the sleeve of the ladies' jacket of the 1890's and to fit Korean women of the twenties who have the standard body type and the average size with the sensory test.

• 한국해양공학회지
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• 제32권5호
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• pp.310-323
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• 2018

In order to protect lives and prevent large-scale injuries in the event of a fire on a ship or an offshore plant, most classification societies are strengthening their fire resistance designs of relevant cargo holds and accommodation compartments to keep flames from being transferred from a fire point to other compartments. Particularly in critical compartments, where flames should not propagate for a certain period of time, such as the A60 class division, both the airtightness and fire-resistant design of a piece passing through a bulkhead are subject to the Safety of Life at Sea Convention (SOLAS) issued by the International Maritime Organization (IMO). In order to verify the suitability of a fire-resistant design for such a penetrating piece, the fire test procedure prescribed by the Maritime Safety Committee (MSC) must be carried out. However, a numerical simulation should first be conducted to minimize the time and cost of the fire resistance test. In this study, transient thermal analyses based on the finite element method were applied to investigate the heat transfer characteristics of a bulkhead penetration piece for the A60 class compartment. In order to determine a rational bulkhead penetration piece design, the transient heat transfer characteristics according to the variation of design parameters such as the diameter, length, and material were reviewed. The verification of the design specification based on a numerical analysis of the transient heat transfer performed in this study will be discussed in the following research paper for the actual fire protection test of the A60 class bulkhead penetration piece.

• 한국해양공학회지
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• 제35권2호
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• pp.141-149
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• 2021

The A60 class deck penetration piece is a fire-resistance apparatus installed on the deck compartment to protect lives and to prevent flame diffusion in the case of a fire accident in a ship or offshore plant. In this study, the sensitivity of the fire-resistance performance and approximation characteristics for the A60 class penetration piece was evaluated by conducting a transient heat-transfer analysis and fire test. The transient heat-transfer analysis was conducted to evaluate the fire-resistance design of the A60 class deck penetration piece, and the analysis results were verified via the fire test. The penetration-piece length, diameter, material type, and insulation density were used as the design factors (DFs), and the output responses were the weight, temperature, cost, and productivity. The quantitative effects of each DF on the output responses were evaluated using the design-of-experiments method. Additionally, an optimum design case was identified to minimize the weight of the A60 class deck penetration piece while satisfying the allowable limits of the output responses. According to the design-of-experiments results, various approximate models, e.g., a Kriging model, the response surface method, and a radial basis function-based neural network (RBFN), were generated. The design-of-experiments results were verified by the approximation results. It was concluded that among the approximate models, the RBFN was able to explore the design space of the A60 class deck penetration piece with the highest accuracy.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 춘계학술대회 논문집
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• pp.733-734
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• 2008

• 박물관보존과학
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• 제10권
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• pp.29-42
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• 2009

본 연구는 국립광주박물관이 발굴 조사한 광주~장성간 도로확장공사 구간 내에서 출토된 수침고목재 25점에 대한 수종을 조사하였다. 그 결과 참나무과 상수리나무류 9점, 참나무과 졸참나무류 6점, 참나무과 밤나무속 3점, 버드나무과 버드나무속 2점, 자작나무과 오리나무속 1점, 장미과 벚나무속 1점, 뽕나무과 뽕나무속 1점, 물푸레나무과 이팝나무속 1점, 두릅나무과 오갈피나무속 1점으로 식별되었다.

• 대한조선학회지
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• 제12권1호
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• pp.9-22
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• 1975

As a second step of a thermal stress analysis in a watertight bulkhead plate during welding of a spool type penetration piece, is idealized as a thin circular disk with a clamped boundary. The exact solution for the transient temperature distribution and associated quasi-static thermal stresses which arise in a circular disk subjected to an instantaneous point source of heat acting in its interior has been obtained. And the solutions have been extended to the case of moving source of heat with the aid of the Duhamel's superposition integral and the results finally derived have been compared with the other results from the typical cases. The solutions can be applied to the problem such as a welding of a penetration piece on the watertight bulkhead and also applicable to the problems which occur in cutting or welding.