오민재 교수

Corrosion reduces the thickness of a structure, making it less safe and reducing its lifespan. In particular, ships are vulnerable to corrosion because they are always submerged in seawater. This corrosion is identified through regular inspections of the ship structure, and gradually increases in scope if no action is taken at an early stage. In this study, we developed a model to detect the corrosion areas and predict the depth of corrosion in the detected areas. The corrosion area detection mo

There are several methods of hull form variation that can be used in initial ship design, such as offset variation, line variation, and hull form variable variation. Hull form variations are typically done manually, and different results can be obtained according to the designer's know-how. This study proposes a conversion method that uses the Free-Form Deformation method to vary the entrance angle and run angle among the variables that are capable of converting hull form. The Free-Form Deformat

The shipping company or the operator determines the mode of operation of a ship. In the case of container ships, there may be various operating patterns employed to arrive at the destination within the stipulated time. In addition, depending on the influence of the ocean’s environmental conditions, the speed and the route can be changed. As the ship’s fuel oil consumption is closely related to its operational pattern, it is possible to identify the most economical operations by analyzing the ope

For their mooring on the sea, ships are equipped with mooring utilities such as anchors, anchor chains, and winches. To determine the specifications of these equipment, the equipment number of each ship must be calculated, and the formula used for calculating this number is provided by the classification society. However, as the equipment number formula was derived based on the tanker at the time of development, it may not be suitable for relatively recent types of ships, such as container ships

In the shipyard, a lot of data is generated, stored, and managed during design, construction, and operation phases to build ships and offshore structures. However, it is difficult to handle such big data efficiently using existing data-handling technologies. As the big data technology is developed, the ship and offshore industries start to focus on the existing big data to find valuable information from it. In this paper, the material requirement estimation method of offshore structure piping ma

The initial ship design process aims to optimize the hull form to enhance ship efficiency. During this phase, hull form variations are executed based on a reference ship to meet shipowner requirements, such as altering the C P (prismatic coefficient) to adjust the section lines. Once these variations are made, a surface is generated. However, this iterative process can be time-consuming as the surface creation must be done manually each time. Thus, we propose a method to directly apply C P varia

Objectives: The purpose of the present in vitro study was to evaluate the biocompatibility of mineral triox- ide aggregate (MTA) mixed with glass ionomer cement (GIC), and to compare it with that of MTA, GIC, IRM and SuperEBA. Materials and Methods: Experimental groups were divided into 3 groups such as 1 : 1, 2 : 1, and 1 : 2 groups depending on the mixing ratios of MTA powder and GIC powder. Instead of distilled water, GIC liq- uid was mixed with the powder. This study was carried out using MG

A T-junction can be found in a boundary curve network when one boundary curve ends in the middle of another. In this paper, we show how to construct G1 Bezier surfaces over a boundary curve network with a T-junction. And we present examples and verify continuity by drawing reflection lines.

본 연구는 템플스테이 참가자의 체험동기, 지각된 가치, 몰입, 만족 간 구조적 관계를 규명하고자 한다. 이를 통해 갈수록 복잡해지고 바쁜 일상으로부터 피로와 스트레스를 느끼고, 휴식을 통해 심신을 재충전하고자 하는 사람들에게 템플스테이 체험이 만족한 삶을 살아가는데 보탬이 될 수 있다는 합리적 근거를 마련해주는 것이 목적이다. 총 266부의 유효 표본을 실증분석에 활용하였으며, 분석결과 가설 1, 가설 2, 가설 3은 모두 채택되었다. 가설 1에서 템플스테이의 체험동기(불교문화, 자기성장, 휴식, 자연동화)는 지각된 가치에 유의미한 정(+)의 영향을 미치는 것으로 나타났다. 이는 템플스테이 체험동기를 불교문화, 자기성장, 휴식, 자연동화로 폭넓게 설정하고, 이들이 모두 지각된 가치를 높이는데 긍정적인 영향을 미치는 것으로 확인된 만큼 템플스테이 체험이 개인의 정신건강에 이로운 영향을 미친다는 점에서 의미가 있다. 가설 2에서 템플스테이 체험에 대한 지각된 가치는 몰입에 유의미한 정(

The material analysis of an offshore structure is generally conducted in the contract design phase for the price quotation of a new offshore project. This analysis is conducted manually by an engineer, which is time-consuming and can lead to inaccurate results, because the data size from previous projects is too large, and there are so many materials to consider. In this study, the piping materials in an offshore structure are analyzed for contract design using a big data framework. The big data

Determining the topology of intersection curves is one of the important issues of surface-surface intersection
\nproblem used in Computer Aided Geometric Design and Computer Graphics. To compute the intersection
\ncurves, we first need to determine the topology of the curves. Thomas A. Grandine[Gr97] presented an
\nalgorithm to determine topology using partial derivatives of surface intersection equations. When the two
\nsurfaces meet tangentially, the differential values of the