• Title/Summary/Keyword: Technology-Engineering

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A Study on the Web-based Cost-Effective Education System for C Programming

  • Park, Kwan-Sun;Jun, Heung-Goo;Kim, Dongsik;Lee, Sunheum
    • Proceedings of the IEEK Conference
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    • pp.250-253
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    • 2002
  • We have implemented an interactive multimedia education system for C programming. The system consists of two pars. One is multimedia contents to help students better understand C language syntax, programming style, and program logic and the other is a web-based compilation support system that compiles C programs at the server side which are submitted trough Web by students and returns their execution results to the students' PC. Although there are currently some restrictions that students should replace the inputs functions such as scanf(), getc() and getch() with assignment statements or fscanf(fp, , ), since the system has been implemented using general web technologies and shareware C compiler, the education system could be one solution that education institutions seek to reduce annual immense expenditure of money on C complier.

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Extraction of Design Parameters for Planar Coupled Lines (유한 요소 해석에 의한 평면형 결합 선로의 설계 파라미터 추출)

  • Lee, Pil-Yong;Park, Jun-Seok;Ahn, Dal;Kim, Hysons-Seok
    • Proceedings of the KIEE Conference
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    • pp.2213-2215
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    • 2000
  • In this paper we implemented a novel re-entrant mode microstrip directional coupler for realizing the high directivity characteristic using finite element (FE) analysis. In microstrip configuration, the high directivity can be reached by matching the even- and odd-mode effective phase velocities. Through the values of capacitance obtained from 2-dimensional finite element(FE) analysis, the phase velocities for each mode and the design parameter were extracted for the proposed coupled-line configuration. Based on the extracted design parameter with phase matching condition we designed and fabricated 30dB directional coupler at 850MHz. Experimental results show good performance with excellent isolation.

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Extraction of Even and Odd Impedance for a Coupled-line Waveguide Structure using the Vector finite Element Method (벡터유한요소법을 이용한 결합선로 구조를 갖는 도파관 구조의 우.기모드 임피던스 추출)

  • Kim, Young-Tae;Park, Jun-Seok;Ahn, Dal;Kim, Hysons-Seok
    • Proceedings of the KIEE Conference
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    • pp.2216-2218
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    • 2000
  • This paper deals with finite element eigenvalue problem using electric field intensity to extract the even and odd impedance for a coupled-line waveguide structure. Calculations for the even-and-odd impedance of a coupled line waveguide structure are achieved based on the relative impedance concept for a waveguide with electric and magnetic wall containes.

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Implementation of A Web-based Virtual Laboratory for Electrical Circuits (웹기반 전기회로 가상 실험실 구현)

  • Kim, Dong-Sik;Choi, Kwan-Sun;Lee, Sun-Heum;Seo, Ho-Joon
    • Proceedings of the KIEE Conference
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    • pp.2487-2489
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    • 2001
  • This paper presents a virtual laboratory system which can be creating efficiencies in the learning process. The proposed virtual laboratory system for electrical circuits provides interactive learning environment under which the multimedia capabilities of world-wide web can be enhanced. The virtual laboratory system is implemented to describe the on-campus laboratory, the learners can obtain similar experimental data through it. The virtual laboratory system is composed of four important components : Principle classroom, Simulation classroom, Virtual experiment classroom and Management system. Learning efficiencies as well as faculty productivity are increased in this innovative teaching and learning environment.

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Contents production of a web-based manual for a measuring instrument (웹 기반의 계측기 사용법 컨텐츠 개발)

  • Arn, Dug-Sang;Lee, Sun-Heum;Choi, Kwan-Sun;Kim, Dong-Sik
    • Proceedings of the KIEE Conference
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    • pp.2600-2602
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    • 2001
  • The laboratory time for students in engineering has to be managed in that way that it provides students width maximal practice hours. However, it usually takes too much time to learn basic knowledge for the experiment and the directions of the equipment. In this paper, we introduce the web contents which students can study basic knowledge the directions of the equipment without regard to time or place. As the result that we let students study the contents before the class, they were easily adapted to handle the equipments for the experiment so that we can revise their execution abilities. And also there were effects such as reducing the total experiment's time and a rate of damage of equipment.

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A study on hydrogen gas sensing characteristics using micro gas sensor (마이크로 가스센서를 이용한 $H_2$ 가스 감지특성에 관한 연구)

  • Lee, Eui-Sik;Lee, Joo-Hun;Lee, Byoung-Wook;Kim, Chang-Kyo
    • Proceedings of the KIEE Conference
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    • pp.2369-2371
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    • 2005
  • MEMS 기술을 이용하여 마이크로 $H_2$ 가스센서를 제작하고 마이크로 히터의 열적 특성과 $H_2$ 가스 농도 변화에 따를 마이크로 가스센서에 대한 감도를 분석하였다. 마이크로 가스센서의 전압 인가에 따른 히터의 온도는 1.0V에서 $250-280^{\circ}C$의 고온 특성을 보였으며, 동작온도 $250^{\circ}C$에서 $H_2$ 가스는 $SnO_2/V_2O_5/Pd$의 감응물질을 도포한 센서의 반응이 우수한 특성을 확인하였다. 동작 온도 $250^{\circ}C$ $H_2$ 농도 5000ppm의 조건에서 $SnO_2/V_2O_5/Pd$의 감응물질을 도포한 가스센서에서 $H_2$ 흡착 반응 시간은 3sec이 탈착 반응 시간은 8-10sec의 결과를 보였다.

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A study on the fabrication technology of 3 dimensional micro inductor (3차원 마이크로 인덕터의 제작기술에 관한 연구)

  • Lee, Eui-Sik;Lee, Joo-Hun;Lee, Byoung-Wook;Kim, Chang-Kyo
    • Proceedings of the KIEE Conference
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    • pp.2380-2382
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    • 2005
  • UV-LIGA 공정을 이용하여 3차원 마이크로 인덕터 제작 기술에 관하여 연구하였다. 마이크로 인덕터의 코일, 비아(via), 코어(core)의 Multi-layer 제작을 위해 UV-LIGA 공정을 이용하였으며, 전해도금(electro plating)을 위한 씨올기(seed layer)로서는 e-beam evaporator를 이용하여 금속을 증착하였다. 3차원 마이크로 인덕터의 도금 방법으로는 전해도금을 사용하였으며, 코일과 비아 부분은 구리(Cu) 전해도금, 코어 부분은 니켈(Ni)과 철(Fe)의 합금인 퍼멀로이(Ni/Fe) 전해도금을 하였다. 3차원 마이크로 인덕터의 샘플크기로는 코어의 폭은 $300{\mu}m$, 전체 길이는 9.2mm, 두께는 $20{\mu}m$의 구조로 제작되었으며, 코일 부분은 폭이 $40{\mu}m$, 두께는 $30{\mu}m$이며, 코일턴 수는 70회의 구조로 제작하였다.

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A Design and Implementation of WEB based Evaluation System (웹기반 평가 시스템의 설계 및 구현)

  • Choi, Kwan-Sun;Jun, Heung-Koo;Lee, Sun-Heum;Kim, Dong-Sik
    • Proceedings of the KIEE Conference
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    • pp.2774-2776
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    • 2001
  • Recently web based lectures in Engineering education are on the increasing. It is required to evaluate student's records on the web. This paper presents web based evaluation system which can evaluate efficiently a stage of understanding in the learning process. The proposed web based evaluation system is designed and implemented using PHP and ORACLE. Lecturers can manage their questions for an examination and learners also can sit for an exam anytime, anywhere, confirm their score in this system. Therefor it provide lecturers and learners with feedback education.

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Google ARcore based Augmented Reality Pet Application (Google ARcore기반 증강현실 반려동물 어플리케이션)

  • Lee, Dong-Wook;Lee, Sung-Won;Jeon, Soobin;Seo, Dongmahn
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.684-686
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    • 2019
  • 증강현실은 3D 도형과 그림 등을 통해 사용자에게 편의를 제공하여 교육, 디자인, 항법, 의학 등의 분야에서 사용되고 있다. 증강현실은 마커기반 증강현실과 비가시적 마커기반 증강현실로 나눌 수 있다. 증강현실 반려동물 어플리케이션은 비가시적 마커기반 증강현실을 기반 하여 가상의 반려동물을 제공함으로써, 실제 교감과 유사한 경험을 제공한다.

Smart Homeplate : Strike Zone Judgement (스마트 홈플레이트 : 스트라이크 존 판단)

  • Son, Su-Jin;Oh, Na-Yeon;Lee, SungWon;Seo, Dongmahn
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.335-337
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    • 2019
  • 본 연구에서는 키넥트와 아두이노 초음파센서를 이용하여 야구 경기 시 발생하는 센서 데이터를 획득하여 스트라이크 판단이 가능한 알고리즘 및 디바이스를 개발하였다. 개발된 디바이스는 야구 경기장 홈플레이트로 사용하며 스트라이크, 볼의 경우에 대해 판단하도록 하였다. 판단에는 스트라이크 존을 측정하기 위해 키넥트의 skeleton tracking 예제로 관절을 측정해 좌표를 알아내고 아두이노 초음파센서를 사용하여 스트라이크를 판단하도록 했다.