Java를 이용한 블록 격파 게임 개발

정갑중 경주대학교 정보전자기술연구소 2005 情報電子技術論叢 Vol.4 No.-

This paper describes the development of a block destroy game as web-based game contents. Client user using web can access and run java applet program with download of java byte code with the independence of hardware system. The block destroy game developed in this paper consists of GUI module, initial block mapping module, thread control module, and mouse motion event handler module. The tread control module creates game thread for processing the movement of a ball and the mouse motion event handler module treats mouse motion and the movement of a bat. It uses two-dimensional integer array data structure for high-speed searching and simple tracing of ball location, and formulates the complex movement of the ball for systemized implementation. The initial block-mapping module generates the blocks for defeating with the string, which is entered by game user. Using user entered string as a blockade for defeating, we provides that game users can be high self-confident in the completion of his own difficulties. The developed game in this paper can be used for another web-based contents and be enhanced by additional functions like 3-D processing and viewing.

크로스바 방식가변형 방송 스위치 구조

정갑중 경주대학교 정보전자기술연구소 2004 情報電子技術論叢 Vol.3 No.-

In this paper, we consider the broadcast switch architecture for highperformance multicast packet switching. In input and output buffered switch, we propose a new switch architecture which supports high throughput in broadcast packet switching with switch planes of single input and multiple output crossbars. The proposed switch architecture has a central arbiter that arbitrates requests from plural input ports and generates multiple grant signals to multiple output ports in a packet transmission slot. It provides high speed pipelined arbitration and large scale switching capacity.

웹 응용을 위한 스마트 퍼즐 게임 개발

정갑중 경주대학교 정보전자기술연구소 2005 情報電子技術論叢 Vol.4 No.-

This paper describes the development of a smart puzzle game for Web application. It provides one of the Internet game services by Web browsers using virtual machine. It supports simple mouse click to move graphic panel object and high-speed image processing with individual sub-image drawing in each graphic panel object. The smart puzzle game developed in this paper uses parallel two-dimensional array for high-speed searching of the individual puzzle tile and efficient moving of each selected puzzle tile. We can apply the individual operation of the graphic panel object to the future WEB application software. The smart puzzle game can be used effectively for the advertisement of tourism information. It is written in 'java' language. Client user using WEB can access and run java applet program with download of java byte code with the independence of hardware system.

임베디드 시스템 응용을 위한 리눅스 커널 구조

정갑중,김기범 경주대학교 정보전자기술연구소 2006 情報電子技術論叢 Vol.5 No.-

This paper describes the architecture and operation of the linux kernel,for embedded system applications, which is used for an embedded system. It shows and analyzes the operations of the linux kernel to investigate the functions and components for new intelligent embedded systems. The requested functions and operations adaptable for the new intelligent embedded system will be applicable to develop a new small size operating system that supports intelligent operations for the embedded system used for intelligent personal information services.

임베디드 OS를 위한 디바이스 드라이버 구조 연구

정갑중 경주대학교 정보전자기술연구소 2007 情報電子技術論叢 Vol.6 No.-

This paper describes the architecture and operation of the device drivers in the linux kernel, for embedded system applications, which is used for an embedded system. It shows and analyzes the operations of the device drivers to investigate the functions and components for new intelligent embedded systems. The requested functions and operations adaptable for the new intelligent embedded system will be applicable to develop a new small size operating system that supports intelligent operations for the embedded system used for intelligent personal information services.

3차원 컴퓨터그래픽을 이용한 레이싱 게임 개발

정갑중,조무호 경주대학교 정보전자기술연구소 2005 情報電子技術論叢 Vol.4 No.-

This paper describes the development of a racing game with three-dimensional computer graphics as one of web-based game contents. Client user using web can access and run java applet program with download of java byte code with the independence of hardware system. The racing game developed in this paper consists of graphic user interface module, initial space generation module, event handler module, and thread control module. The thread control module creates new game thread when the game starts. The game threadmanages three-dimensional graphic objects for creation, translation and transformation, and the view port control for three-dimensional viewing and projection of the graphic objects. It uses 2-D linked list data structure for the 3-D graphic objects that are located in three-dimensional space for high-speed object searching and sorting. It enhances the dynamic object moving and viewing in three-dimensional space. We can use the developed racing game to inform game users of information for an advertisement like tourism information, and can apply the proposed 3-D drawing technology to 3-D game graphic engine core.

계층화된 피코넷의 데이터 처리율에 대한 연구

조무호,정갑중 경주대학교 정보전자기술연구소 2005 情報電子技術論叢 Vol.4 No.-

A piconet is a wireless ad hoc data communications system which allows a number of independent data devices to communicate with each other. A piconet is distinguished from other types of data networks in that communications are normally confined to a small area around person or object whether stationary or in motion that typically covers at least 10 m in all directions. A child piconet is one that is formed under an established piconet. The child piconet functionality is useful for either extending the area of coverage of the piconet or shifting some computational or memory requirements to another PNC capable device. Child piconet is also referred to as dependent piconet since they rely on the parent PNC to allocate channel time for the operation of the dependent piconet since they rely on the parent PNC to allocate channel time for the operation of the dependent piconet. It is possible for the parent piconet to have more than one child piconet. In addition, it is also possible for a child PNC to allow a child piconet as a part of its own piconet. The data throughput of piconet can be affected by these hierarchical formation. In this paper we investigate the data throughput of hierarchical piconet by numerical analysis. Results show that hierarchical piconet can extend the service coverage as expected. But the data throughput is increased a little with a increased relay delay also.

서울 강서지역 1개 대학병원에서 성인 급성 신우신염의 원인균과 항생제 감수성

황병연,이재갑,박대원,이연주,김성범,엄중식,손장욱,정희진,김우주,김민자,박승철 대한감염학회 2003 감염과 화학요법 Vol.35 No.5

목적 : 3년간 서울시 강서지역의 1개 대학병원에서 입원치료를 받은 성인 급성 신우신염 환자를 대상으로 원인균과 항생제 감수성을 조사하고, 향후 급성 신우신염의 초기 경험적 치료 항생제를 제안하고자 하였다. 방법 : 1999년 1월부터 2001년 12월까지 3년간 고려대학교 의과대학 구로병원에 상부요로감염으로 내원한 16세 이상 환자 229명의 의무 기록을 검토를 통하여, 인구학적 특성, 원인균, 항생제 감수성, 초기 항생제 사용 양상과 입원기간을 조사하였다. 결과 : 연구에 포함된 229명을 118명의 단순 신우신염군과 111명의 복잡 신우신염군으로 구분 하였다. 단수 신우신염의 평균 발생 연령은 38.2세와 복잡 신우신염 56.1세로 복잡 신우신염 환자의 연령이 유의하게 높았다(P<0.001). 양군 모두에서 원인균 중 E. coli의 분리율이 가장 높았으며 항생제 감수성 결과 ampicillin, trimethoprim-sulfame-thoxazole에는 높은 내성률을 보였고, ciprofloxacin, gentamicin, cefotaxime에 대한 감수성은 비교적 높았으나 복잡 신우신염의 경우 단순 신우신염에 비하여 ciprofloxacin, gentamicin에 대한 감수성이 다소 낮은 것을 확인할 수 있었다. 평균 입원 기간, 항생제 투여 기간에 있어서도 복잡 신우신염군에서 유의하게 길었다. 결과 : 본 연구의 결과 서울의 강서 지역에서 대학병원급에 치료 의뢰되는 단순 급성 신우신염의 치료에 있어 1차 항생제로 3세대 cephalosporin, aminoglycoside, quinolone 중 한가지를 초기 경험적 치료제로 사용을 고려하여야 할 것으로 사료된다. Background : The purpose of this study is to recommend the initial therapeutic regimen for adult patients with acute pyelonephritis (APN) according to the changes of antimicrobial susceptibility patterns of causative microorganisms isolated from patients with APN. Methods : We reviewed medical charts of 229 APN patients, who had been treated at Korea University Guro Hospital from 1st of January. 1999 to 31st of December, 2001. We investigated the demographic data, clinical findings, durations of hospital treatment, antimicrobial susceptibility patterns of the causative microorganisms and initial antibiotic regimens in patients with APN. Results : In this study, 229 adult patients with APN were classified into simple APN patients (118 patients, 51.5%) and complicated APN patients (111 patients, 48.4%). Mean age of patients with simple APN was 38.2±14.1 years old and that of patients with complicated APN was 56.1±14.9 years old. Mean age of patients with complicated APN was significantly higher than that of simple APN patients (P<0.0001). Escherichia coli was the most common microorganism both in simple APN (96.7%) group and in complicated APN (90.6%) group. Antimicrobial susceptibility of E. coli was at the low level of ampicillin (31%/20%) and trimethoprim-sulfamethoxazole (42.6%/34.2%) in each group. In contrast, ciprofloxacin (11.5%/22.7%), gentamicin (16.4%/22%) and cefotaxime (0%/8.2%) resistance remained at relatively lower level. In comparison of simple APN with complicated APN, ciprofloxacin and gentamicin resistances were higher in complicted APN group. Average duration of hospitalization (5.9±2.3 days/8.2±4.6 days) and duration of antibiotic use (12.1±3.9 days/15.3±10.0 days) were significantly longer in complicated APN. Conclusions: The results of this study suggests that 3rd cephalosporin, aminoglycoside or quinolone antibiotic would considered as one of the initial therapeutic regimen for patients with simple APN in southwestern Seoul.

LiTaO_3 단결정을 사용한 압전변압기의 개발

황성필,김무준,하강열,강갑중 한국센서학회 2002 센서학회지 Vol.11 No.3

본 연구에서는 온도에 따른 압전특성이 매우 안정적인 LiTaO_3(x-112°y) 단결정을 이용하여 압전변압기를 제작하고 그 특성을 분석하였다. 제작시 LiTaO_3 단결정의 변환효율이 낮은 단점을 보완하기 위해 Lame'-mode를 이용하여 길이와 폭의 비가 2:1인 압전변압기를 제작하고 PSpice를 이용하여 진동 모드 해석, 입력전압에 따른 출력전압특성 및 진동속도특성을 분석하였다. 제작한 압전변압기는 길이방향의 제 2차 고조파 주파수와 폭방향의 기본공진주파수가 결합된 290.83(㎑)에서 입력전압에 대한 최대출력전압이 나타났으며, 약 10배 정도의 승압비를 얻을 수 있었다. The single crystal of LiTaO_3(x-112°y) has very stable thermal characteristics in a piezoelectric transformer. In this paper, a piezoelectric transformer made of the crystal is newly designed and its operating characteristics are analyzed. The length of the transformer is determined as twice as its width for Lame'-mode because the single crystal of LiTaO_3 has low electro-acoustic efficiency. The electric and vibrational characteristics of the transformer is simulated by the PSpice program, and its results are compared to experimental ones. As the results, the ratio of output voltage to input shows large than 10 at 290.83(㎑), which is the frequency coupled the 2nd harmonic for length and the fundamental for width of the Lame'-mode transformer.

Environment Configuration for the Development of Embedded Gadget System

Gab Joong Jeong,Changseok Bae 한국정보통신학회 2007 2016 INTERNATIONAL CONFERENCE Vol.1 No.1