• 한국컴퓨터정보학회논문지
• /
• 제25권12호
• /
• pp.173-186
• /
• 2020

본 논문에서는 지하공간 통합지도를 탐사 현장에서 활용하기 위한 모바일 단말기용 서비스 시스템을 설계 구현한다. 모바일 단말기용 현장활용 서비스 시스템은 지하공간 통합지도 관리 시스템에서 제공하는 타일맵, 3차원 지형정보, 지하구조물, 지하시설물, 지반정보 등을 현재 위치에 따라 3차원으로 가시화하도록 설계되었고, 현장 탐사로 얻어진 결과를 실시간으로 반영하도록 설계되었다. 또한, 제안된 시스템은 모바일 단말기의 무선 네트워크 및 기기 특성에 따른 제약 문제로 지하공간 통합지도를 glTF 포맷 형태로 전송 후 가시화 하도록 구현하였다. 구현된 모바일 서비스 시스템은 지하공간 탐사 현장에서 3차원으로 지도 및 공간 객체들을 가시화하여 사용자에게 정확하고 통합된 지하공간 데이터를 제공함으로써 탐사 현장에서의 사고 발생을 방지할 수 있다. 그리고, 갱신된 지하공간 데이터를 실시간으로 지하공간 통합지도 관리 시스템에 전송하여 최신성과 정확성을 유지할 수 있다.

• 농업과학연구
• /
• 제39권2호
• /
• pp.279-289
• /
• 2012

This study was conducted to survey and diagnose operation status of the agricultural machinery rental service, analyse and compare operational efficiency among 82 city and county ATDEC (agricultural technology development and extension center) using the DEA (Data Envelopment Analysis) method, and recommend future direction, for improvement of the business. Input variables were invested budget and labor, and output variable was rental return. Percentages of return to investment on the rental service were calculated as 68.3% and 63.9% when analyzed with CCR (Charnes, Cooper and Rhodes) and BCC (Banker, Charnes and Cooper) models, respectively, indicating inefficiency of the service operation. Increase of rental charge would increase efficiency by 63.9~68.3% depending on models, and decrease of financial and labor investment would improve the efficiency by about 11.3%. Technical efficiency would be more important than scale efficiency, therefore adjustment of over-invested budget and labor needed to be made together with increase of rental charge to improve the operation. Among the ATDECs providing the rental service, 6 (7.3%), 43 (52.4%), and 33 (40.2%) were in state of CRS (constant return to scale), IRS (increasing return to scale), and DRS (decreasing return to scale), respectively. These indicated public aspects of the rental system, over-investment, lack of output component for input component, meaning that scale income would be increased by qualitative expand of rental charge. Efficiency analysis of the rental system by region showed that efficient ATDECs to be benchmarked by others were in the order of DMU-70, DMU-54, DMU-29, DMU-5, DMU-22, DMU-2, and DMU-61. More comprehensive and extensive survey and analyses would be necessary in the future.

• 대한안전경영과학회지
• /
• 제23권3호
• /
• pp.67-82
• /
• 2021

The domestic professional engineer qualification system has been changed after the enactment of the law in 1963. However, the domestic professional engineers have been unaccepted and unrecognized internationally. In addition, the domestic professional engineer system is operated in accordance with the individual laws of each ministry, but the official qualification examination is conducted by the Human Resource Development Service of Korea. Thus, the domestic professional engineer system has many problems in system itself and operating. In this research, we compare the domestic qualification system with the systems of other foreign countries, and propose how to improve the qualification system. This study limits the scope to the qualification examination for P·E. We suggest 3 ways to improve the qaulification examination; (1) The structure of the qualifications, (2) The testing method, and (3) The unification of the qualification system and operation.

• Journal of Information Technology Applications and Management
• /
• 제21권2호
• /
• pp.81-98
• /
• 2014

Recently, due to external environment like the changes in health policy and various healthcare accreditations, along with hospital's internal efforts to improve the quality of medical services, demands for the development of medical information systems are increasing. Some examples are clinical information like DUR (Drug Utilization Review), CVR (Critical Value Report), and automatic benefit processing by treatment purposes, or hospital DSS (Decision Support System) on overall medical practice. Such systems act as a guide in making clinic judgments during practice or in other medical practice, and their effects on the medical treatment improvements are being proven by previous studies. In the reality of increasing attention in the effects of medical treatment improvement, studies related to hospital DDS were mostly focused on clinical, technical, and engineering points of view, and studies focusing on the user viewpoint are very limited. In order to verify the effects of DSS on practice improvements and hospital's management performance, this study used a research model constructed to verify how SERVQUAL of hospital DSS affects hospital management performance in BSC (Balanced Score Card) point of view. To empirically verify the research model, a questionnaire was conducted on the basis of "K-University Hospital's DSS" on clinicians and hospital employees related to system development, and the relationships between the factors were analyzed through path analysis. As a result of path analysis, excluding reactivity, tangibility, confidence, reliability, empathy among service qualities, had partially significant effects on management performance factors (learning and growth, internal process, financial affairs). This study is to prepare the theoretical ground on the management performance analysis of hospital DSS, and suggest the service quality of the system that should be considered in the planning and development stages for improved system.

• 보건행정학회지
• /
• 제4권2호
• /
• pp.1-26
• /
• 1994

As the hospital environment is changing rapidly, management is therefore obligated to use new ways to provide better service to patients. For example information system is introduced to some hospitals in Korea. Information system has several benefits such a soperational efficiency by on-line delivery and processing of data, accurate and rapid information production, continuous monitoring of performance and feedback, improvement of work process and better service quality. Still, many hospitals cannot be sure that information system is useful for improving organization performance. Because only one or two area of hospital information system were considered for development and with limited development hospital information system cannot be used effectively. The purpose of this study is to suggest the model of information system utilizaton and to analyze the hospital in formation system in Korea. The results are following; 1. In Korea, proportion of operating system of comuter is 31% of UNIX, 11% of IBM OS and 10% of PC LAN. 2. As we expect, scope of application software and amounts of heardware and software invest ments are affected by concern of CEO. 3. Many CIO(chief information officer) say that the biggest problems are lack of after-service and obsolescence of computer equipments in terms of hardware and shortage of application software for hospital in terms of software. 4. Personnel of information system department is so small that hospital information system can't be improved. 5. During the development of information system, full-time participation of end user is only 20% hospital with almost less than 12 person-month. This study was accomplished by survey through mail questionnaires. Response to the survey was only 55% and it was hard to generalize all the result obtained from this survey. However, We hope that this study would be helpful for helth care organization to acknowlege hospital information system in korea and to design the future architecture and frame of information system.

• 한국통신학회논문지
• /
• 제36권5B호
• /
• pp.471-476
• /
• 2011

본 논문에서는 최근에 기본 개념이 창안된 개인 환경 서비스(Personal Environment Service: PES)의 시스템과 프로토콜 구조에 대해 확장된 방안이 제안되었다. PES는 스마트폰과 사용자 프로파일을 기반으로 하는 대표적인 모바일 컨버전스 서비스로 그 파급 효과가 매우 크다. 그러나 초기부터 시스템 구조에 대해 충분히 연구되지 않으면 효과적인 실용화 가능성이 낮아진다. 본 논문에서 제안된 PES 서비스 시스템과 프로토콜 구조는 향후 본격적인 연구개발 단계에서 좋은 참조 내용이 될 것이다.

• Journal of Positioning, Navigation, and Timing
• /
• 제12권3호
• /
• pp.307-314
• /
• 2023

Wide-Area Differential Global Positioning System (WADGPS) is a system that operates a number of reference stations to provide correction information to improve the accuracy of GPS users, and it is available to service users within the area where the wide-area reference stations are installed. Recently, as positioning information has been used in various applications, the need for WADGPS for precise navigation in long-distance spaced areas where the wide-area reference stations cannot be installed has been raised. This paper tested the user navigation performance outside the wide-area reference stations of the WADGPS system, which serves both GPS Precise Positioning Service (PPS) and Standard Positioning Service (SPS) users. Static and dynamic tests were conducted using vehicles, and as a result, position accuracy improvement through WADGPS was confirmed even at points hundreds of kilometers outside the network area of the wide-area reference stations. Through this, the performance of the PPS/SPS correction system and the possibility of expanding the service area were confirmed.

• Journal of information and communication convergence engineering
• /
• 제7권2호
• /
• pp.92-97
• /
• 2009

Lately, influence of information rises and interest about satisfaction estimation of information providing service is risin. According to rapid change in information environment, information-providing service is being changed in various form, in which center development is made in relation to the effort for customer satisfaction intended to enhance user's satisfaction level through providing more convenient and higher service centered on information service user rather than information service provider. Organizations providing information service is also changing their service from traditional one centered on service provider to that for user's satisfaction and service quality, and evaluation of information service quality and measurement of user's satisfaction as the result of using information service are regarded important. In this respect, it is needed to measure user's satisfaction level for environmental factors of information service and analyze what kind of influence they have to enhance user's satisfaction level of information service. Also function and efficiency of information offer service are important. Therefore, interest for satisfaction survey to heighten contents satisfaction of information-providing service, service satisfaction, satisfaction of user of system satisfaction is increased. In this paper, we propose a model of the user satisfaction index for information-providing services and present the user satisfaction index is measured to the model. Also we this study suggest qualitative improvements of information-providing service required for change to user-centric information-providing service through measuring user satisfaction index of ITFIND system and schemes to improve information quality

• Journal of Electrical Engineering and Technology
• /
• 제12권5호
• /
• pp.1916-1924
• /
• 2017

Fossil oil, as the main energy of transportation, is destined to be exhausted. The electrification of transportation is a sustainable solution to the energy crisis, since electric power could be acquired from the inexhaustible sun, wind and water. Among all the problems that hinder the development of Electric Vehicle (EV) industry, charging issue might be the most prominent one. In this paper, the service process of a charging station with Battery Energy Storage System (BESS) is analyzed by means of $Cram{\acute{e}}r$ - Lundberg model which has been intensively utilized in ruin theory. The service quality is proposed in two dimensions: the service efficiency and the service reliability. The arrival rate and State of Charge (SOC) upon arrival are derived from 2009 National Household Travel Survey (NHTS). The simulations are performed to show how the service quality is determined by the system parameters such as the number of servers, the service rate, the initial capacity, the charge rate and the maximum waiting time. At last, the economic analysis of the system is conducted and the best combination of the system parameters are given.