• Applied Biological Chemistry
• /
• v.40 no.3
• /
• pp.189-195
• /
• 1997

The structural basis of Iysine specificity of Achromobacter protease I (API) was investigated by means of site-directed mutagenesis. The precursor protein in which Glu190, one of the two candidates for determining Iysine specificity, was substituted by glutamine, aspartic acid or leucine was processed autocatalytically to attaln full pretense activity with lysine specificity. The substitution of the other candidate, Asp225, for asparagine or leucine produced no mature active forms of pro-API. The precursor protein of the mutant D225E slowly matured autocatalytically. The lysylendopeptidase activity of the mature D225E was 0.25% of that of native API, and this reduced activity is mainly due to a decrease in the affinity of the enzyme for lysine. These results suggest that Asp225 plays a critical rol in restricted substrate specificity as a lysylendopeptidase. However, D225E exhibited no measurable activity for synthetic ornithine substrate. Since the hydroxyl group of Ser194 in this mutant retained essentially the same reactivity to DFP or PMSF as that in native API, it can be noted that a methylene unit longer side chain of residue 225 is not compensated by a methylene unit shorter side chain at subsite P1 in the bound substrate.

• 한국HCI학회:학술대회논문집
• /
• 2006.02a
• /
• pp.266-274
• /
• 2006

본 논문은 새로운 햅틱 API 인 "K-Touch"의 개발에 관한 것이다. 그래픽 하드웨어 기반의 핵심 역감 알고리즘을 기반으로 개발된 K-Touch API 는 가상 환경을 구성하는 다양한 데이터 형식(3D polygon model, volume data, 2.5D depth image)에 대한 햅틱 상호작용을 가능하게 하고, 새로운 햅틱 알고리즘 및 장치 개발에 필요한 소프트웨어 확장성을 제공함과 동시에 사용자가 쉽고 빠르게 햅틱 응용분야를 개발할 수 있도록 설계되었다. 아울러 햅틱 감각의 중요 요소인 역감 및 촉감 상호작용을 위해 기존의 햅틱 SDK 및 API 와 달리 역/촉감을 동시에 제시할 수 있는 알고리즘이 개발되었다. 본 논문에서 제안하는 새로운 햅틱 API 의 효용성을 검증하기 위해 다양한 응용분야의 예를 구현하였다. 새로운 햅틱 API 인 K-Touch 는 사용자 및 연구자에게 보다 효율적으로 햅틱 연구를 진행 할 수 있도록 도움을 주는 툴(Tool)로써 중요한 역할을 할 것으로 기대된다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.10b
• /
• pp.700-702
• /
• 2003

휴대폰 및 PDA 산업의 급속한 발전에 더불어 2D환경에서 제작돈 많은 컨텐츠들이 서비스 되고 있으며 일부 2D기술을 통해 응용된 2.5D 수준의 다양한 기법을 통해 컨텐츠의 3D환경을 구현하는 방법이 사용되고 있다. 현재 모바일 기기의 기술적 한계에도 불구하고 모바일 컨텐츠 개발 업체 및 3D가속기 제작 업체에서 모바일용 3D API와 가속기에 대한 연구 및 개발이 계속되고 있으며 일부 일본과 유럽지역에서는 모바일용 3D엔진이 개발되어 출시되고 있다. 본 논문에서는 하드웨어적 성능의 제약 때문에 개발에 어려움을 겪고 있는 모바일 3D 엔진 기술의 동향에 대해 분석하고 현재 개발되었거나 개발 중인 모바일 3D엔진 API 및 하드웨어 가속기등의 특징과 하드웨어상의 제한에 따른 기술 개발의 한계 및 문제점을 분석하여 모바일 엔진 개발에 대한 해결방안을 제시하겠다.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.29 no.3
• /
• pp.219-223
• /
• 2009

This paper prescribed the structural integrity of the API 5L X65 pipeline subjected to tensile pre-strain. The effects of pre-strain on the mechanical properties of API 5L X65 pipe were substantially investigated through a variety of the experimental procedures. Axial tensile pre-strain of 1.5, 5 and 10% was applied to plate-type tensile specimens cut from the pipe body prior to mechanical testing. Tensile test revealed that yield strength and tensile strength were increased with increasing tensile pre-strain. The increasing rate of the yield strength owing to the pre-strain is greater than that of the tensile strength. However, the pre-strain up to 5% had a little effect on the decreasing of the fracture toughness. The structural integrity of the API 5L X65 pipeline subjected to large plastic deformation was evaluated through the fitness-for service code.

• Journal of the Computational Structural Engineering Institute of Korea
• /
• v.22 no.3
• /
• pp.243-250
• /
• 2009

In order to reduce the time needed for design, enterprises recently need the customizing technology that can modify the functions of existing CAD systems according to the their purposes. So most of the companies developing commercial CAD system are providing API to make possible the preparation of macro or external programs, which allow automatic performance of a series of repeated tasks. The objective of the present paper is to achieve more convenient carrying out of a particular modeling, by developing 3D CAD template of the standardized engineering rule of the particular model in order to establish a knowledge-based product development system. The formula, data and design knowledge which are required for the designing of the components of refrigerator were made into a program by means of Unigraphics' UG/Open API. And examples of such a development were presented. By using them in connection with commercial CAD system, design verification and modification were efficiently applied to the product design business.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.8 no.3
• /
• pp.27-33
• /
• 2009

Content used in mashups is typically obtained from a third party source through a public interface or API (web services). Other methods of obtaining content for mashups include Web feeds (e.g. RSS or Atom), and screen scraping. A mashup or meshup Web application has two parts: A new service delivered through a Web page, using its own data and data from other sources. The blended data, made available across the Web through an API or other protocols such as HlTP, RSS, REST, etc. There are many types of mashups, such as consumer mashups, data mashups, and Business Mashups. The most common mashup is the consumer mashup, which are aimed at the general public. Examples include Google Maps, iGuide, and RadioClouds. 4D Wall-map display is data mashups combine similar types of media and information from multiple sources into a single representation. This technology focus data into a single presentation and allow for collaborative action among ITS-related information sources.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.3
• /
• pp.1014-1020
• /
• 2012

This paper focuses on the development of a supporting S/W tool that can minimize designer's manual operations and errors in metal mold design based on a 3D solid model. The scope in this work includes the offset surface modeling, the computation of the padding force, the generation of material table, the decision of hole position, the estimation of the size of raw material, which are the essential parts of press die and mold design in automotive industry. The proposed system has been developed as a plug-in type using Pro/E API and Visual C++ in order to put the system into the menu functions of Pro/E which is one major 3D CAD systems in the manufacturing industry.

• Journal of KIBIM
• /
• v.3 no.3
• /
• pp.29-38
• /
• 2013

Domestic construction industry is larger in size, and its shape is more complex. As a result, collaboration and information management tasks are difficult to manage in a way that conventional 2D-based exchange of information. BIM technology was introduced as a solution for this. But BIM only provides a very limited set of features such as Constructability review, clash detection in reality. and duplication of work and a lot of iterations occurs in BIM process. Thus, it takes quite a lot time to work. We studied how to improve the work efficiency by connecting API to business processes. Using the API in the integration process by automating repetitive tasks, reduce a significant amount of work time Using API (Automation, Optimization, Interoperability, Analysis) can solve the task problem that does not solved by the basic features, If we make good use of the combined API will be improved productivity.

• Journal of the Korea Safety Management & Science
• /
• v.6 no.4
• /
• pp.227-238
• /
• 2004

This development has tried to scheme out the convenience for users to use the 3D modeling solution which is developed from the existing programs. The extended 3D modeling solution, to be developed through the use of the API which is provided and Microsoft Access, database is able to reuse the parts, subassemblies of parts, and assemblies. A methodology exhibits the possibility to use a Spinfire Professional Spinfire Reader program. The web evaluation system, which is used to connected with the Internet explorer and to construct a web service, will repeat the evaluations of the company staffs and customers about the new products which the company have designed. The furniture manufacturing company will adopt the 3D modelling solution in modelling the new products and go through the web evaluation system to collect dissatisfied facts of the customers or the company staffs against the new product. Finally, it will contribute to the enormous benefit creation of the enterprise.

• Journal of the Korean Society for Precision Engineering
• /
• v.20 no.12
• /
• pp.115-125
• /
• 2003

The design methodology of plastic injection molding die has been gradually moved from two-dimensional line drawings to three-dimensional solid models. The 3D design gives many benefits, a few of which are: ease of design change, data associativity from concept design to final assembly. In the paper represented is the implementation of a program which automatically generates 3D mold-bases and cooling-lines, conforming to given geometric constraints. It utilized a commercial CAD software and the related API(application program interface) libraries. We constructed a DB(database) of typical mold-bases assembled from standard parts, from which the geometry (position & dimension) of a mold-base and composed parts can be automatical]y determined by a few key parameters. Also we classified cooling lines into several typical types and constructed a DB, from which the position of cooling lines is automatically determined. The research is expected not only to simplify construction of a 3D mold-base model including cooling lines but also to reduce design efforts, by way of databases and automatized determination of geometric dimensions.