한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

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.

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.

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.

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.

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.

학교급식의 친환경농산물 수급에 관한 연구

서정원,송문갑 동신대학교 2005 論文集 Vol.15 No.-

Korea's meal service in schools has been rapidly improved by support with government policy and set up of systems since year of 2000. But the quality of school meal service is not all right to students. We suggest that feed materials of school meal should substitute Friendly Agricultural Products. Than students keep their health and will improve their eating habits in addition to agricultural development.

하악전돌증 환자의 악교정 수술후 하악과두의 위치변화와 안정성에 관한 연구

오정환,김여갑 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this sutudy was twofold; the first purpose is to ascertain the direction of condyla displacement and changes of joint space in patient receiving mandibular ramus osteotomy for the inandiNll' prognathism. the second purpose is to determine whether a significant relation exists between joint changes and postoperative skeletal changes. The material of this study was composed of 16 patients vno operated for mandibular prognathism by sagittal split osteotomy(n=fi) and vertical ramal osteotomy (n=8). Ead patient had a radiographic taken. Cephalometric radiographs were performed preoperatively, imniediatt postoperatively, andat least 6 months after surgery. TMJ tomograms were taken within 1 week preoperati and 6-24months later after the surgery. The results were as follows 1. On lateral cephalogram, there were significant decreases in posterior facial height, SNB angle, SNPo angle and correction of anterior crossbite, as the mandible was surgically retruded. 2. The `mandibular condyles had tendencies for displacement to anterosuperior direction in SSRO group and t anteroinferior direction in VRO group. 3. On TMJ tomogam, although there were tendencies for decreases anterior, posterior joint space, and inch posterior joint space in SSRO group, there were noe statistically significant(p>0.05). In VRO group, alth uu; there were tendencies for increases anterior, superior, and posterior joint space, there also were nc significant(p>0.05). 4. There were existed some correlation between joint space change due to condylar displacement and skelet relapse. It seemed that postoperative skeletal relapse was influenced by condylar displacement afte mandibular setback by ramal osteotomy. 5. The bony changes after mandibular ramus osteotomy for mandibular prognathism were noted as doi,hl contour on the posterior part of the condylar head, and flattening on the anterosuperior part of the cond; 1, head.

도산지수를 이용한 부실예측에 관한 연구

심갑용,정호섭,조경선 전북대학교 산업경제연구소 1999 전북대학교 산업경제연구소 논문집 Vol.30 No.-

어떤이 일이 일어나기 전에 그것을 예측하는 것은 그것이 어떤 일이든지 그리 간단하지는 않다. 특히 지진예측은 불가능에 가까울 정도로 어려운 일이라고들 한다. 그에 비해 도산을 사전에 예측하는 것은 훨씬 쉽다. 왜냐하면 지진은 지구의 지각구조가 갑자기 일으키는 현상으로서 그 구조가 충분히 해명되어 있지 않은데 비해, 기업의 도산은 사람이 기업활동을 통해 일어나는 결과로서 그 메커니즘을 상당히 정확하게 파악할 수 있기 때문이다. 기업의 도산은 개인행동이나 기업행동으로서 감지 할 수 있으며 소문이나 기업의 분위기도 기업의 부실이나 도산을 예측하는 중요한 판단 자료일 수 있다. 그러나 이러한 인지보다는 기업이 제공하는 재무자료를 통해서 그 기업의 경영상태나 재무상태를 알 수 있기 때문에 재무정보를 바탕으로 신뢰성있는 기업의 부실이나 도산을 예측할 수 있다. 본 연구에서 도산지수라는 새로운 개념을 도입하여 기존의 연구들이 가지고 있는 기업부실예측의 한계점에 극복하고자 한다. 이를 위해서 본 연구에서는 기존의 연구들이 사용하는 재무비율변수를 그대로 사용하지 않고 기업의 부실이나 도산의 예측에 좀 더 적합하도록 하기 위해 수정한 재무비율변수를 사용할 것이다. 따라서 기존연구에서 사용된 재무비율과 상당히 다르다. 이러한 재무변수로 통계적 기법을 사용하여 부실기업과 비부실기업간의 차이 분석을 통해 결과를 도출하고 이렇게 도출된 변수로 도산지수라는 개념을 사용하여 기업의 부실을 쉽고 용이하게 예측하고자 했다. 그 결과 연구가설에서 설정한 5가지 재무변수를 검증한 결과 부실기업과 비부실기업간의 차이가 매우 유의적으로 나타났으며, 또한 부실전 3년간의 부실기업의 도산지수가 1.0보다 상당히 작게 나타났으며 비부실기업의 도산지수는 1.0보다 크지는 않지만 1.0에 매우 근접해 있었다. 이러한 결과를 바탕으로 도산지수를 이용하여 부실기업을 예측하는데 일반화 가능성을 확인 할 수 있었다. 본 연구에서는 사례연구도 병행하여 그 적용을 타진해보았다.

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.