• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
• /
• pp.544-548
• /
• 1999

This study is about development of Feature-based Solid Modeling system in integrated CAD/CAM environment. Parasolid modeling kernel and HOOPS/3D graphics library was used to develop this system in PC level. System feature library was defined using both procedural and declarative approach method. The raw stock is created by boolean operator using design primitives, and a part is designed that pre-defined feature is removed from the raw stock. This method is called "DSG(Destructive Solid Geometry)" and basic constructive operator of this system. This is not complete system and only the first step to develop Feature-based Solid Modeling System using Parasolid. We will add more powerful functionality and flexible GUI in Windows.n Windows.

• 한국수학사학회지
• /
• 제31권3호
• /
• pp.151-166
• /
• 2018

The rule of the game of Chomp is simple and the existence of a winning strategy can easily be proved. However, the existence tells us nothing about what strategies are winning in reality. Like in Chess or Baduk, many researchers studied the winning moves using computer programs, but no general patterns for the winning actions have not been found. In the paper, we aim to construct practical winning strategies based on backward induction. To do this we develop how to analyze Chomp and prove and find the winning strategies of the simple games of Chomp.

• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
• /
• pp.804-808
• /
• 2002

A strategic decision making needs a sound process modeling to find out the right path of organizational changes; however, dynamic feedback processes involved in a real world business, make it difficult to predict the outcomes of strategic decisions. In this paper, we present a conceptual framework to facilitate strategic decision making process for organizational changes. The framework, which employs the concepts of analytic network process (ANP) and system dynamics (SD), can be used to prioritize various projects under consideration and to make a long-term strategic plan in a constructive manner.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 가을 학술논문 발표대회
• /
• pp.109-110
• /
• 2021

An attempt has been made on a constructive approach to evaluate the performance of snail shell ash (SSA) for its corrosion performance under marine environments. Corrosion performance of steel rebar in chloride contaminated SSA with (0% to 50%) replacement levels of cement extract medium was examined through electrochemical and weight loss techniques. Initially, snail shell powder (SSP) is made by pulverizing and subsequently SSA is by thermal decomposition methods. A critical level of 20 % SSA improved both corrosion resistance properties of cement extracts. SSA is a suitable replacement material for natural limestone in cement productions.

• 정보처리학회논문지A
• /
• 제9A권4호
• /
• pp.631-638
• /
• 2002

가상학습을 지원하는 시스템은 경제적인 면과 운용의 편의성 및 효율성, 기능성을 고려하여 개발되어야한다. 또한 구성주의적 접근을 통한 시스템의 설계는 구성요소간 상호작용의 증대를 통해 사용자와 관리자의 편의성을 높일 수 있다. 가상학습 시스템 개발에서 편의성과 안정성, 경제성리 확보는 중요한 요소이며 이를 위해 가상학습의 각 구성요소의 관점을 고려한 체계적인 설계가 요구되며 다양한 설치 및 개발 환경에서 플랫폼에 독립적인 시스템의 개발이 필요하다. 본 연구에서는 구성주의적 관점 중에서 상호작용에 중점을 둔 접근을 통해 플랫폼에 독립적인 가상학습 시스템을 설계 및 구현하고 편의성 및 효율성을 분석하고 검증하였다. 개발한 시스템은 구성요소간의 상호작용과 객체를 기반으로 모듈로 설계하였고 APM을 기반으로 플랫폼 독립적인 개발을 통하여 이식성과 경제성을 향상시켜 가상학습 시스템의 개발 및 운영에 대한 비용과 노력의 절감을 가져올 수 있도록 하였다.

• 한국안전학회지
• /
• 제33권2호
• /
• pp.132-137
• /
• 2018

Compared with general rivers, fluctuations of the water level and the river bed are severe in the tidal river. In hydro-dynamic aspect, such fluctuation gives different river-bed data to us according to observing period. The time-dependent river-bed data and pre-estimation of the Manning's roughness coefficient which is the key factor of numerical modelling induces uncertainty of evaluating the design flood level. Thus it is necessary to pay more attention to calculate the flood level at tidal rivers than at general rivers. In this study, downstream of the Imjin River where is affected by tide of the West Sea selected as a study site. From the numerical modelling, it was shown that the unsteady simulation gave considerable mitigation of the water level from the starting point to 15 km upstream compared to the steady simulation. Either making a detention pond or optional dredging was not effective to mitigate the flood level at Gugok - Majung region where is located in the downstream of the Imjin River. Therefore, a more sophisticated approach is required to evaluate the design flood level estimation before constructive measures adopted in general rivers when establishing the flood control plan in a tidal river.

• 한국실내디자인학회논문집
• /
• 제21권2호
• /
• pp.207-214
• /
• 2012

Today, museum exhibition can be divided into two sub-categories: a. informative exhibition with various useful auxiliary media to convey knowledge and b. appreciative exhibition considering aesthetic conveyance and visual/perceptual environment. In addition to this, the concept of memorial exhibition as a field that tangible and intangible memories are transmitted and reproduced is creating another genre of exhibition. As an example of such a memorial exhibition above, the work of de-constructive architect Daniel Libeskind was selected. Jewish Museum and Imperial War Museum North both of which maximized the exhibition space by grafting architectural language to exhibition narrative were analyzed and compared to see if the same architectural language can be displayed differently in another form of exhibition after being drawn into the exhibition space depending on the changes in time and perspective. Therefore, in the narrative display combining the selection of exhibition contents and storytelling, the formative language of space can confirm that exhibition narrative as an ending structure changed into a retelling story with more extended meanings through interactive factors. Eventually, in this formative narrative, when the display of historical facts and exhibition themes is combined with the architectural language in an exhibition hall according to the approach direction, the memorial exhibition can create a formative language stimulating sensibility in the memories of space and a differentiated formative exhibition space where one is truly moved by oneness of contents.

• 보존과학회지
• /
• 제34권3호
• /
• pp.227-233
• /
• 2018

보존가가 문화재를 보존하기 위한 철학적 담론을 이해하고 보존에 대한 윤리적 태도를 갖추고 보존원칙을 실천하는 것은 문화재의 질적 수준을 결정하는 중요한 요소이다. 그러나 지금까지 이에 대한 연구는 비교적 부족하였으며, 그로 인하여 문화재 보존에 있어서 지속적으로 철학의 부재나 원칙의 부재가 문제점으로 지적되고 있다. 이에 대한 해결방안을 제시하기 위해서는 보존철학과 보존윤리에 대한 중요성과 필요성을 학술적으로 먼저 정립하는 과정이 필요하다. 본고에서는 보존철학과 보존윤리의 개념을 서술하고, 이들 간의 상관관계, 그리고 문화재 보존의 주체인 정부-학계-전문가가 해결해나가야 할 과제를 제시하였다.

• Steel and Composite Structures
• /
• 제37권5호
• /
• pp.551-569
• /
• 2020

Vibration of vertically aligned-monolayered-nonuniform nanorods consist of functionally graded materials with elastic supports has not been investigated yet. To fill this gap, the problem is examined using the elasticity theories of Eringen and Gurtin-Murdoch. The geometrical and mechanical properties of the surface layer and the bulk are allowed to vary arbitrarily across the length. The nonlocal-surface energy-based governing equations are established using differential-type and integro-type formulations, and solved by employing the Galerkin method by exploiting admissible modes approach and element-free Galerkin (EFG). Through various comparison studies, the effectiveness of the EFG in capturing both nonlocal-differential/integro-based frequencies is proved. A constructive parametric study is also conducted, and the roles of nanorods' diameter, length, stiffness of both inter-rod's elastic layer and elastic supports, power-law index of both constituent materials and geometry, nonlocal and surface effects on the dominant frequencies are revealed.

• Journal of Construction Engineering and Project Management
• /
• 제5권2호
• /
• pp.24-34
• /
• 2015

The complexity arises in defining the construction quality due to its perception, based on inherent market conditions and their requirements, the diversified stakeholders itself and their desired output. A quantitative survey based approach was adopted in this constructive study. A questionnaire based survey was conducted, for the assessment of construction quality perception and expectations in the context of quality improvement technique. The survey feedback of professionals, from the leading construction organizations/companies of Pakistan were analyzed. The financial capacity, organizational structure, and construction experience of the construction firms formed basis for their selection. After statistical analysis of survey feedback it was found reliable and valid for the inferential purpose to the target population of construction professionals. The quality perception was found to be project scope oriented, considered as an excess cost for a construction project and keeping the rework minimum by qualifying the required quality tests, keeping the defects minimum by ensuring the specifications of supplied material. Any quality improvement technique was expected to address the financial aspects of the construction project for the employer and contractor, by increasing the profitability through reduction in overall cost, reduction in time, reduction in defects and improving the productivity in a construction project. The study is beneficial for the construction professionals to assess the prevailing construction quality perception and the expectations from implementation of any quality improvement technique in construction projects.