• Journal of Korean Society of Environmental Engineers
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• v.29 no.6
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• pp.728-733
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• 2007

Presence and distribution of bacteria and fungi in inner compartment of PCs(Personal Computers) were investigated. Samples for the analysis were collected from inside of PCs which had been used in various facilities including public computer facilities, laboratories and computer training rooms of a university. Total number of PC examined in this study was 51 each. When the total CFU(colony forming unit) of the inner compartment of the PCs was measured, the bacterial count was found to be dependent on the operation time(total running time) of PCs. When the distribution of bacteria in the inner compartment of PCs was estimated, CPU(Central Processing Unit) cooling fan area showed the highest bacterial concentration(average 605 $CFU/cm^2$). In the case of the fungi, various opportunistic pathogens including Aspergillus sp. and Penicillium sp. were isolated and identified in the inner compartment of PCs. And the average of bacterial number in the dust collected from the PCs was 212 CFU/mg. These results indicated that handling of PC might have a risk of infection by the microorganism.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.8 no.5
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• pp.54-62
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• 1999

This paper describes the design and implementation of a PC(personal computer) based open architecture machine tool controller. The hardware of open architecture CNC has generally a motion control board on a PC for controlling a servo motor. But this paper describes open architecture hardware that consists of a PC, a counter board a DAC board and a DIO board only. This makes it easy to generate CNC software module in a hardware-independent way. The proposed open architecture CNC software runs on the MS-Windows NT. The paper describes a method of con-trolling servo motors using a real-time timer of MS-Windows NT and a commercial real-time operating system on the MS-Windows. NT. An open and reconfigurable software module is made up of an object and an API(application programming interface). Using the object and the API a new CNC system can be quickly configured to control dif-ferent machine tools. The proposed open architecture CNC system is applied to 4-axis lettering center.

• Proceedings of the KOSOMBE Conference
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• v.1991 no.11
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• pp.79-82
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• 1991

Digital FHR monitoring system based on the personal computer combined wi th the digital signal processing (DSP) board was implemented. The DSP board acquires and digitally processes ultrasound fetal Doppler signal for digital rectification, envelope detection, autocorrealtion function calculation and its peak position detection. The personal computer interfaced with the DSP board is in charge of graphic display, hardcopy, data taransmission and on-line analysis of fetal heart rate change including on-line warning system, base-line estmation, acceleration, deceleration and variability. The advantages of PC-DSP based system can be summarized as follows: 1) Minimum hardware realization. 2) Increased flexibility. 3) Total care system.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.11a
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• pp.195-198
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• 2001

UPIMS(University Personal Information Management System) 서비스는 컴퓨터를 이용하여 대학생들의 일정 관리를 위한 서비스 였으나, 인터넷과 무선 통신이 발달하면서, 사용자들이 개개인의 정보를 전화 단말기와 Office용 PC, 가정용 PC에서도 정보를 공유하고자 하는 요구가 발생하였고, 각 정보를 팀원간 공유를 통해 사용자 자신이 언제, 어디서나 원하는 정보를 전달받기를 원하며, 전달해주기를 원하고 있다. 이에 무선 인터넷 서비스를 통해 다양한 무선 단말기에 구애받지 않고, 사용자 정보를 관리할 수 있는 서비스를 가능하게 하기 위하여, 무선통신 기반의 PIMS(Personal Information Management System) 서버를 구축하여 개개인의 일정관리, 주소록 관리, 그룹 관리 학사일정 등의 다양한 개개인의 정보 맞춤 서비스를 수행하는 기능을 제공한다. 뿐만 아니라, UPIMS서버는 인터넷상의 다양한 정보를 관리 및 저장하여 가입자의 요구시 사용자 단말기에 적합한 형태로 정보를 변환하여 전송하는 역할을 하며 예약 시스템에도 활용 가능하게 된다.

• The Magazine of Kiice
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• v.5 no.1
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• pp.38-48
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• 2004

정보기술(Information Technology ; IT)의 발전을 대표하는 상징 중에 하나는 것은 각 가정에 설치된 개인용 컴퓨터(Personal Computer)를 들 수 있다. 즉, PC의 보급이 광범위해지면서 PC가 생산, 보유한 정보를 서로 공유하고 교환할 필요성을 느끼게 되어 특정 개인의 PC에만 국한되지 않고 networked PC가 필요하게 되었고, PC간의 데이터통신을 위한 다양한 기술들이 개발되기 시작하였다. 그 첫 번째 시도가 지리적으로 가까이 있는 컴퓨터간의 통신네트워크를 구성하려는 시도였는데, 이것이 근거리 통신망(LAN)과 1990년대 중반에 탄생한 웹(WWW; world wide web)의 출현이다. (중략)

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.24 no.2
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• pp.361-368
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• 1994

Radiographic planning is needed for implant placement in order to determine implant length, jaw bone volume, anatomical stucture and so on. Radiographic examination includes conventional radiography, conventional tomography and CT scan. The most accurate mesurement can be obtained from CT scan. For the cross-sectional view of mandible, CT scan reconstruction is generally needed. But the cross-sectional view of mandible can be reformed by personal computer. This study was performed to examine the clinical usefulness of reformed image using personal computer in comparison with CT scan reconstructed image. CT axial slices of 4 mandibles of 4 volunteers were used. Digital imaging system was composed of Macintosh Ⅱ ci computer, high resolution Sony XC-77 CCD camera, Quick Capture frame grabber board and 'NIH Image' program. Seven reconstructed cross-sectional images within CT machine(CT group) were obtained. And seven reformed cross-sectional images(PC group) after digitization of CT axial slices into the personal computer were obtained. PC group was compared with CT group in the objective and subjective aspects. The results were as follow: 1. Measurement of mandibular height & width in both group showed insignificant difference(P>0.05). 2. Subjective assessment of the mandibular canal in both group showed insignificant difference(P>0.05). 3. Image reformation using personal computer could provide panoramic view, which could not be obtained in CT scan reconstruction.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.94-97
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• 2009

본 연구에서 개발한 UPC(Ubiquitous Personal Computer)는 무선 네트워크를 지원하는 모바일 폰을 이용하여 언제 어디서든 PC의 자원을 사용할 수 있는 기술로서, 모바일 폰은 WebDAV 프로토콜을 이용하여 WebDAV 서버자원(PC의 자원)을 관리하며, GUI 환경의 간편한 사용자 인터페이스를 제공한다. 사용자는 구현된 인터페이스와 WebDAV 기본 메소드를 이용하여 PC에 자원을 등록하고, PC 자원에 대하여 열람, 검색, 삭제, 업로드, 다운로드 등을 제공한다. 이와 같은 시스템은 휴대용 기기(PDA, 모바일 폰)의 저장 공간 한계를 극복하는 하나의 해결책이 될 수 있다. 개발되어진 UPC를 적용 모델은 삼성 Anycall SCH-M470을 이용하였으며 일차적으로는 에뮬레이터를 이용하여 실험을 거쳤고 이 실험을 바탕으로 솔루션을 SCH-M470모델에 배포하여 실험 및 검증을 하였다.

• 제어로봇시스템학회:학술대회논문집
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• 1988.10a
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• pp.562-566
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• 1988

The purpose of this study is to develop a personal computer aided 3-D geometric modeller. To perform this study, we set up a cube, a cylinder, and a prism as a primitive in the first segment of this study. By modelling the 3-D object through their transformation, addition, and subtraction, we proved the validity of the developed algorithm and its computer program. Some examples show the results of applying the program to modelling a few simple shape of the machine parts. These results met the first aim of this study.

• Proceedings of the Korean Nuclear Society Conference
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• 2003.05a
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• pp.78.1-78.1
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• 2003

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.1
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• pp.59-66
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• 1989

The purpose of this study is to develop a personal computer aided 3-D geometric modeller. To perform this study, we set up a cube, cylinder, and a prism as primitives in the first segment of this study. By modelling the 3-D object through their transformation, addition, and subtraction, we proved the validity of the developed algorithm and its computer program. Some examples show the results of applying the program to model a few simple shapes of the machine parts. These results met the first aim of this study.