• The KIPS Transactions:PartA
• /
• v.13A no.1 s.98
• /
• pp.27-34
• /
• 2006

Designers should know CAD tool/license information such as available number of licenses or tools, types, and configuration methods to use CAD tools properly in their group. Usually, this information is provided by managers who administrate CAD tool and license servers in the specific design group. In the previous CAD tool/licenses sharing methods, designers have to get CAD tool/license information manually and setup the environments with their own hands. n a new designer comes into the design working group, the designer wastes unnecessary design time, because of these processes. As a result, designer's poductivity and utilization of CAD tools will decrease Besides, managers also waste their time and effort, since they should provide CAD tool/license information manually to each designer. In this paper, we present an automated scheme to share CAD tool/license information based on directory service. The proposed methods automate the communication processes between managers and designers that minimze unnecessary time to share CAD information. In addition, as this system maintains the consistency of CAD information automatically that remove the repeated work of managers and designers, it improves the enciency of sharing. Besides, it automates the license configuration steps using prof(y Last, we offer Executable Proxy which is proper for thin CAD application. We believe this scheme will reduce designers and managers' time and effort as well as maximize the utilization of CAD tools.

• Korean Journal of Computational Design and Engineering
• /
• v.11 no.3
• /
• pp.164-171
• /
• 2006

As collaborative design and configuration design are of increasing importance in product development, it becomes essential to exchange the feature and parametric CAD models among participants. A history-based parametric method has been proposed and implemented. But each translator which exchanges the feature and parametric information tends to be heavy because to implement duplicated functions such as the identification of the selected geometries, mapping between features which have different attributes. Furthermore. because the history-based parametric translator uses the procedural model as the neutral format, which is the XML macro file, the history-based parametric translators need a geometric modeling kernel to generate an internal explicit geometric model. To ease the problem, we implemented a shared integration platform, the TransCAD. The TransCAD separates translators from the XML macro files. The translators for various CAD systems need to communicate with only the TransCAD. To support the communication with the TransCAD, we exposed the functions of the TransCAD by using the Automation APIs, which is developed by Microsoft. The Automation APIs of the TransCAD consist of the part modeling functions, the data extraction functions, and the utility functions. Each translator uses these functions to translate a parametric CAD model from the sending CAD system into the XML format, or from the in format into the model of the receiving CAD system This paper introduces what the TransCAD is and how it works for the exchange of the feature and parametric models.

• Journal of Microbiology and Biotechnology
• /
• v.27 no.2
• /
• pp.289-296
• /
• 2017

Lysine decarboxylase (CadA) converts ${\small{L}}-lysine$ into cadaverine (1,5-pentanediamine), which is an important platform chemical with many industrial applications. Although there have been many efforts to produce cadaverine through the soluble CadA enzyme or Escherichia coli whole cells overexpressing the CadA enzyme, there have been few reports concerning the immobilization of the CadA enzyme. Here, we have prepared a cross-linked enzyme aggregate (CLEA) of E. coli CadA and performed bioconversion using $CadA^{CLEA}$. $CadA^{free}$ and $CadA^{CLEA}$ were characterized for their enzymatic properties. The optimum temperatures of $CadA^{free}$ and $CadA^{CLEA}$ were $60^{\circ}C$ and $55^{\circ}C$, respectively. The thermostability of $CadA^{CLEA}$ was significantly higher than that of $CadA^{free}$. The optimum pH of both enzymes was 6.0. $CadA^{free}$ could not be recovered after use, whereas $CadA^{CLEA}$ was rapidly recovered and the residual activity was 53% after the $10^{th}$ recycle. These results demonstrate that $CadA^{CLEA}$ can be used as a potential catalyst for efficient production of cadaverine.

• Journal of KIISE:Computing Practices and Letters
• /
• v.12 no.1
• /
• pp.1-8
• /
• 2006

Since most CAD tool companies are carrying out very expensive license policies, designers are sharing CAD tools with a limited number of licenses within a design working or research group. It is important to share and use them efficiently, because CAD tool licenses are very valuable resources. Designers should know CAD tool license information such as available number of licenses, types, and configuration methods to use CAD tools properly in their group. Usually, this information is provided by managers who administrate CAD tool license servers in the specific design group. In the previous CAD tool licenses sharing methods, designers have to get CAD tool license information manually and setup the environments with their own hands, If a new designer comes into the design working group, the designer wastes unnecessary time and effort due to these manual processes. As a result, designer's productivity and utilization of CAD tools will decrease. Besides, managers also waste their time and effort, since they should provide CAD tool license information manually to each desiEner. In this paper, we present a more efficient scheme to share CAD tool licenses based on directory service. The proposed method automates not only the communication processes between managers and designers, but also the license configuration steps. We expect this scheme will reduce time and effort of designers and managers as well as enhance the utilization of CAD tools.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.28 no.1
• /
• pp.92-99
• /
• 2004

With the advent of computers, CAD systems are widely used for various design practice. Complexity of CAD systems and difficulty of exchanging data among different CAD systems, however, do not allow efficient use as desired. In addition, to follow variety of designers' need, CAD activities should be customized. This article proposed a methodology fer developing an intelligent CAD system and the sate-of-the-art technologies described fur customizing CAD systems using API (Application Programming Interface). A basic platform is proposed and a useful application system is implemented to enable a parametric design by directly inputting numerical values on a CAD model. Based on this application, we developed a system that makes it possible to share part family data between SolidEdge and Pro/Engineer. The proposed concept on intelligent CAD systems facilitates integration of external systems such as CAE tools and promotes the use of CAD for both engineering designers and analysts.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.30 no.3 s.246
• /
• pp.219-230
• /
• 2006

Digital CAD models are one of the most important assets the manufacturer holds. The trend toward concurrent engineering and outsourcing in the distributed development and manufacturing environment has elevated the importance of high quality CAD model and its efficient exchange. But designers have spent a great deal of their time repairing CAD model errors. Most of those poor quality models may be due to designer errors caused by poor or incorrect CAD data generation practices. In this paper, we propose a rule-based approach for healing CAD model errors. The proposed approach focuses on the design history data representation from a commercial CAD model, and the procedural method for building knowledge base to heal CAD model. Through the use of rule-based approach, a CAD model healing system can be implemented, and experiments are carried out on automobile part models.

• Journal of the KSME
• /
• v.32 no.2
• /
• pp.124-133
• /
• 1992

컴퓨터 이용설계(CAD)란 어떤 것인가에 대한 정의와 CAD시스템을 구축하기 위한 필요요소를 설명함으로써 향후 CAD시스템을 도입하고자 하는 업체에게 다소나마 도움이 되고자 하였다. 또한 국내에 CAD시스템이 도입된 역사속에서 단계별 형태를 보임으로써, 현재 CAD시스템을 사용하고 있는 업체의 경우 자신이 어느 단계에 위치하는지 파악할 수 있도록 하였다. 마지막 으로 국내 대표되는 몇몇 기업의 적용사례 및 향후 추진방향을 소개함으로써 국내전체기업의 CAD시스템 활용수준을 측정하는데 도움이 되고자 하였다.

• Journal of Korea Multimedia Society
• /
• v.9 no.8
• /
• pp.1010-1019
• /
• 2006

CAD system is a very important technology in designing the products which we are using today. This CAD technology has been enlarging its area into 3D CAD systems with the development of computer graphics technologies. In particular, such advances have been realized in special area such as the CAD system for designing shoes. However, because it is difficult to design a 3D CAD system, most CAD developments except for major CAD software companies usually have employed the AutoCAD which realizes 3D concepts. Also, many shoes' designers have been skilled with 2D shoe CAD systems and then they can make high achievements. Therefore, we design a new shoe CAD system with advantages of 2D CAD system and 3D CAD system. We also implement the scheme to transfer the data between 2D CAD system and 3D CAD system and also grading technologies to get patterns of various shoes size from a basic shoe's design.

• Korean Institute of Interior Design Journal
• /
• no.19
• /
• pp.160-165
• /
• 1999

이 연구의 목적은 실내디자인 학생들간에 나타나는 CAD에 대한 태도, 적성과 그들의 성격 유형간의 관련성을 알아보고 이들 성향이 CAD 교수법에 미치는 영향을 조사하기 위한 것이다. 연구방법은 설문조사, 성격 유형 검사, CAD 성적, 그리고 교과목 성적을 통한 통계분석으로 이루어졌으며, 실험은 실내디자인 전공 3학년 학생 56명을 대상으로 실시되었다. 실험 실시 환경은 CAD가 디자인 도구로 쓰여지는 실내 디자인 실기 수업으로 구성되었으며, 정확한 실험 결과 분석을 위해 CAD 숙련도 성적과 종합 교과목 성적이 분리. 채점되었다. 연구 결과 학생들의 성격 유형은 의향형, 직관형, 느낌형, 및 판단형(ENEJ)을 선호하는 것으로 나타났다. 이는 실험에 참여할 실내디자인 전공 학생들이 직관에 의해 사물을 인지하고, 문제 해결을 하는데 있어 감성에 의지하며, 체계적이고 조직적인 판단력을 가지고 있음을 의미한다. CAD에 대한 태도와 성격유형의 관계에서는 CAD가 유용하다고 생각한 학생들이 느낌형에 강한 선호도를 보였으며, CAD 적성과 성격 유형의 관계에서는 CAD 숙련도 성적이 높은 학생이 판단형에 강한 선호도를 나타내었다. 또한, CAD 성적이 뛰어난 학생이 종합 교과목 성적도 좋은 것으로 나타났다. 이는 CAD 숙련도의 차이가 학생들의 전반적 디자인 능력에도 영향을 끼칠 수 있음을 시사한다. 결론적으로, 이 연구 결과는 학생들의 성격과 학습인지 성향이 컴퓨터 교육의 효율성에 영향을 미친다는 기존의 타 분야에서의 연구결과가 실내디자인 분야에도 타당성을 지님을 증명해주었으며, 실내디자인 수업에 있어 컴퓨터 관련 교과목의 교수법이 실내디자인 학생들의 성격 유형을 바탕으로 개발이 될 때 그 활용 효과를 극대화 할 수 있음을 제시하고 있다.

• Journal of the Korea Institute of Building Construction
• /
• v.16 no.2
• /
• pp.169-175
• /
• 2016

A survey of small-size contractors in Jeju was conducted to investigate college graduate's CAD (computer aided design) competence. Most of small-size contractors use CAD softwares to review and update drawings submitted from an architect. This research analyzed the curriculum of the architectural engineering in several national universities. The CAD classes have 4 or 6 hours per week and use AutoCAD primarily. This research proposes that a CAD class needs at least 6 hours per week, 2D drawing is the main theme in the curriculum, and exercises to make 3D models are also included in the CAD class. The improved methods, Internet cafe and real time feedbacks using a smartphone, to evaluate the reports and exercise results are necessary.