• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.81-85
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• 2005

In this paper, the structural design optimization of a wafer grinding machine using a multi-step optimization with genetic algorithm is presented. The design problem, in this study, is to find out the optimum configuration and dimensions of structural members which minimize the static compliance, the dynamic compliance, and the weight of the machine structure simultaneously under several design constraints. The first design step is shape optimization, in which the best structural configuration is found by getting rid of structural members that have no contributions to the design objectives from the given initial design configuration. The second and third steps are sizing optimization. The second design step gives a set of good design solutions having higher fitness for lightweight and minimum static compliance. Finally the best solution, which has minimum dynamic compliance and weight, is extracted among those good solution set. The proposed design optimization method was successfully applied to the structural design optimization of a high precision wafer grinding machine. After optimization, both static and dynamic compliances are reduced more than $92\%\;and\;93\%$ compared with the initial design, which was designed empirically by experienced engineers. Moreover the weight of the optimized structure are also slightly reduced than before.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2001년도 Bulletin of The 5th Asian Design Conference International Symposium on Design Science
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• pp.63.1-63
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• 2001

• 한국BIM학회 논문집
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• 제5권1호
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• pp.16-24
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• 2015

The kinetic façade system is an interactive building envelope which is adaptive to environmental condition by transforming the behaviour of its components. The design process of kinetic façade system calls for a novel approach. It needs to support designers to adopt technologies from multidisciplinary fields such as physical computing and robotics. In this paper, prototyping method is introduced as a useful technique for implementing kinetic façade systems. In order to incorporate prototyping method into architectural design process, two aspects are investigated in digital design studio: (1) The interactions between digital and analogue environments (2) The role of traditional design tools. Furthermore, the role of BIM is investigated by analyzing two aspects.

• 전자통신동향분석
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• 제35권2호
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• pp.69-78
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• 2020

Small portable devices such as mobile phones and laptops currently display a trend of high power consumption owing to their characteristics of high speed and multifunctionality. Low-power SoC design is one of the important factors that must be considered to increase portable time at limited battery capacities. Popular low power SoC design techniques include clock gating, multi-threshold voltage, power gating, and multi-voltage design. With a decreasing semiconductor process technology size, leakage power can surpass dynamic power in total power consumption; therefore, appropriate low-power SoC design techniques must be combined to reduce power consumption to meet the power specifications. This study examines several low-power SoC design trends that reduce semiconductor SoC dynamic and static power using EDA tools. Low-power SoC design technology can be a competitive advantage, especially in the IoT and AI edge environments, where power usage is typically limited.

• 한국콘텐츠학회논문지
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• 제6권12호
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• pp.201-215
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• 2006

본 연구는 모든 유아 교육 기관의 교재 교구 관리에 있어서 양질의 전산 관리 시스템을 용이하게 사용하도록 설계 및 구현하고, 이를 활용하는 방안을 제시하는데 그 목적을 두고 있다. 이를 위해 개발한 교재 교구 관리를 위한 프로그램은 교육부 고시에 의한 제6차 유치원 교육 과정을 준거로 개발 범위를 한정하였다. 이런 목적을 달성하기 위하여 모든 교육 자료는 종류나 모양뿐만 아니라 구입한 시기와 만든 교사에 관계없이 교사들 모두가 쉽게 분류하고 사용하기에 편리하도록 보관할 수 있어야 하고, 유아 교육 현장에서 일단 사용한 교재 교구는 다음의 현장 적용을 위하여 반드시 보수하여 보관하여야 하는데, 경우에 따라서 사용 후에 즉시 보수가 어려우면 그 교재 교구의 보수를 위한 정보를 자세하게 기록해 둠으로써 어느 교사가 보수 작업을 하더라도 쉽게 할 수 있도록 해야할 뿐 아니라, 제작 또는 구입하여 분류한 교재 교구는 반드시 등록하여 그 자료에 관한한 모든 정보를 한 눈에 파악할 수 있어야 하며, 색인부를 만들어 교육 계획 수립시에 사용함으로써 교육 과정의 운영 효과를 크게 기대할 수 있도록 해야 한다는 방침에 따라 설계하고 개발하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.785-791
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• 2005

Reconfigurability of machine tools is one of the critical factors to realize the responsive manufacturing systems to satisfy the mass-customization production. This paper presents the methods to model and simulate the machine tools on Internet in response to change in the machining requirements. Specifically, a set of module combination rules and a modeling method of the structure of machine tools using connectivity graph are developed. In response to the user requirements, kinematic relations and structures of machine tools can be derived using the module combination rules and connectivity graph relationships. Internet-based simulator of machine tools is implemented and presented. The developed machine tool simulator can be used to verify the structure of machine tools derived from the user requirements.

• 한국정보시스템학회지:정보시스템연구
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• 제32권2호
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• pp.153-176
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• 2023

Purpose As non-face-to-face work environments become common due to COVID-19, interest in online collaboration tools that can communicate smoothly without time and space limitations is continuously increasing. Most of the prior studies are about the introduction, use intention, and satisfaction of cloud computing-based collaboration tools, and studies on the effects of collaboration tools on work-life balance and quality of life are somewhat lacking. Therefore, in this study, the characteristics of cloud computing-based collaboration tools were derived, and the effect on job satisfaction during work and job stress outside of working hours was confirmed. Design/methodology/approach This study applied the S-O-R framework and conducted an online survey of office workers who used cloud computing-based collaboration tools for more than three months. Hypotheses were tested using structural equations. Findings As a result of the analysis, among the characteristics of collaboration tools, stability, usefulness, and interoperability had higher job satisfaction as more stimuli were applied. In addition, the higher the job satisfaction during work, the higher the job performance, work-life balance, and quality of life.

• 한국콘텐츠학회논문지
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• 제21권8호
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• pp.403-412
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• 2021

모바일 앱의 수가 기하급수적으로 늘어남에 따라 앱 개발과정에서 이루어지는 테스트의 자동화가 중요해지고 있다. 앱을 출시하기까지 다양한 유형의 테스트를 통해 반복적인 검증이 이루어지는데, 다양한 유형의 테스트 중 GUI 테스트를 중심으로 본 연구는 진행되었다. 안드로이드의 GUI 테스트 자동화 툴을 개발하기 위해서 안드로이드 앱 테스트의 UI Control 16가지와 Material Design Guideline에 대해서 기초 자료를 수집하였다. 그 후 기존 GUI 테스트 자동화 툴에 대해서 스크린 캡처 테스트 기반 2가지 툴과 소스코드 분석 테스트기반 4가지 툴 분석을 하였다. 분석을 통해 기존의 GUI 테스트 자동화 툴들은 시각적 설계, 인터페이스 사용 용이성, 컴포넌트 배치에 대해서는 고려하지 않고 있다는 점을 파악하였다. 이러한 기존 툴의 미비점을 보완하고자 새로운 GUI 테스트 자동화 툴 개발 방법으로 컴포넌트 선정이나 관리 분석 그리고 컴포넌트별 소스코드 예시로 탐색 메뉴나 버튼, 아이템 그룹화나 리스트에 관한 방법을 제시하였다. 본 연구는 GUI 테스트의 새로운 개발 방향을 제시함으로써 개발사의 안정적인 앱 배포에 기여할 수 있다는 점에서 의의가 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.79-80
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• 2012

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.720-723
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• 1995

As a part of the configuration design expert system of machine tools, inference mechanisms are constructed in this paper. In addition to procedural inference, the method of multivariable inference is considered as an efficient approach to deal with the cases of highly coupled condition. We propose a generalized multivariable inference procedure. The procedure is applied to the type selection module of the configuration design expert system of machine tools in order to demonstrate the efficiency and validity.