• 한국정보처리학회논문지
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• 제7권2S호
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• pp.649-655
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• 2000

Real-time application programs have constraints which need to be met between media-data. These constraints represents the delay time ad quality of service between media-data to be presented. In order to efficiently describe the delay time and quality of service, a new synchronization mechanism is needed. Proposed paper is a dynamic synchronization that minimized the effects of adaptive transmission delay time. That is, the method meets the requirements of synchronization between media-dat by handling dynamically the adaptive waiting time resulted from variations of delay time. In addition, the mechanism has interval adjustment using maximum delay jitter time. This paper decreases the data loss resulted from variation of delay time and from loss time of media-data by means of applying delay jitter in order to deal with synchronization interval adjustment. Plus, the mechanism adaptively manages the waiting time of smoothing buffer, which leads to minimize the gap from the variation of delay time. The proposed paper is suitable to the system which requires the guarantee of high quality of service and mechanism improves quality of services such as decrease of loss rate, increase of playout rate.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 추계학술발표대회 및 정기총회
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• pp.615-618
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• 2005

기업 내의 정보 시스템은 기업 내 모든 정보를 저장하여 관리하여 의사 결정 지원 및 고객 맞춤 서비스를 제공하는 등 기업의 이익은 물론 기업의 이미지, 신뢰도 등에 매우 중요한 역할을 한다. 대학의 정보 시스템은 대학 행정, 학사 업무, 연구 지원 등을 한다. 특히 학사 정보 시스템의 경우 대학의 개교 이래 학생들의 모든 수강 기록, 성적 등의 기록이 저장되고 관리되어지는 매우 중요한 시스템이다. 그러나 열악한 대학 재정의 한계로 학사 정보 시스템의 중요성에 비해 백업 시스템을 전혀 운용하지 않고 있거나, DAT 복사 등의 매우 초보적인 수준으로 백업 시스템을 구성 및 운용하고 있다. 본 논문에서는 대학 내 학사 정보 시스템의 안정적인 운용을 위하여 2년여 동안의 시스템을 분석한 후, 대학의 열악한 재정 상황을 고려하여 E-IDE 디스크 기반의 스토리지를 이용한 네트워크 기반의 백업 시스템을 설계, 구현한다. 또한 설계, 구현한 백업 시스템을 사용하는 경우 일, 주, 월 등으로 학사 정보 시스템의 정보를 안정적으로 백업하고 운영할 수 있다. 특히 천재지변, 화재 등 예상치 못한 장애에 대하여서도 효과적인 대처가 가능하다.

• The Journal of Asian Finance, Economics and Business
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• 제4권3호
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• pp.75-83
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• 2017

This paper examines key determinants and the effect of country-of-origin on customer's purchase intention of functional food and dietary supplement product in Vietnam. Exploratory study was identified to evaluate personal and social factors on customer's buying behavior. Twenty-eight reflective constructs were adapted from literature and designed by using a seven-point Likert scale to facilitate measurement. By using non-probability convenience sampling, data was collected from a survey of 242 Vietnamese who have experienced in buying functional and supplement food. This paper employed partial least square structural equation modeling (PLS-SEM) as a technique employed to analyze the measurement and structural models. The findings provide evidence that social prestige customer perceives and their positive attitude toward functional food which are main factors influencing on consumers' purchase intention. Customer's perceived prestige plays an important role in decision-making process to purchase. The higher social prestige taken up in consumers' mind, the higher consumers' purchase intention is. Moreover, the more positive attitude customer holds toward functional food, the higher consumers' purchase intention. The research results provide useful information in current understanding of what antecedents determine factors influencing customer's intention to purchase functional food and lead to managerial implications for business strategies.

• Natural Product Sciences
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• 제20권3호
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• pp.202-205
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• 2014

Three compounds including 7,7-bis(3-indolyl)-p-cresol (1), cyclo-(S-Pro-R-Leu) (2) and cyclo-(S-Pro-R-Val) (3) were isolated from the strain of Bacillus megaterium LC derived from the marine sponge Haliclona oculata. All the isolated compounds showed antimicrobial activity at MIC values ranging from 0.005 to $5{\mu}g/mL$ against Gram-negative bacteria Vibrio vulnificus and V. parahaemolyticus, gram-positive bacteria Bacillus cereus and Micrococcus luteus, and the dermatophyte Trichophyton mentagrophytes. The results suggested that these compounds might have potential to be developed as agents treating dermatosis and controlling vibriosis in aquaculture.

• 한국유기농업학회지
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• 제17권4호
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• pp.529-538
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• 2009

호밀을 간작으로 하는 콩 유기재배시 호밀의 파종시기 및 파종방법을 구명하고자 실시한 연구결과는 다음과 같다. 호밀의 파종 계절별 콩 수확 후 근권토양 내 토양 화학성의 차이는 나타나지 않았다. 호밀의 춘파시기에 따른 콩 수확 후 토양의 이화학성 변화를 보면 호밀의 파종시기가 늦춰질수록 유기물 함량은 높아졌으나, pH, 유효인산 및 치환성양이온의 값은 낮아졌다. 호밀을 간작으로 하는 콩 유기재배시 호밀의 파종을 3월 20일에 실시하고, 호밀을 2줄 5열로 파종을 하되 콩을 조간 70cm로 점파하였을 때 가장 높은 콩 수량을 보였다.

• 지역연구
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• 제8권1호
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• pp.99-118
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• 1992

In spite of the rapid development of information and computer technology, the software side of those technologies has not been well studied especially in the area of regional planning. Throughout this study we identified some critical facts as below: 1) the necessity of region-specific information which is vital for urban and regional development, 2) the necessity of integration of information system into a regional unit rather than setoral unit, 3) aggravated regional inequality through the spread of communication and computing tools, and 4) advanced regional information system linking satellite and graphic computers in developed countries. From these facts, we recommend some policy directions as below: 1) It is desperately needed to establish a regional information center covering large administrative area. 2) In establishing these system, we can utilize existing communication network or estblish a brand new system. Utilization of existing administrative network and board of statistics for data collection and management, and the utilization of postal office or telephone company for distribution are recommended through the evaluation of those two alternatives, 3) It is also recommended that one-step data collection system should be established. 4) The Dat Base should be organized in many steps in close relationship with development goal and planning process. In order to make most use of this system, we need to develop a monitoring system, regional indicators and ex-ante impact studies.

• 한국항공운항학회지
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• 제24권3호
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• pp.1-9
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• 2016

The study examined the effects of shift pattern and expertise on perceived workload and performance for aviation security screeners. 18 security screeners participated in this study, in which data were analyzed by dividing them into two groups (experts vs. less-experts). We measured their perceived workloads and performances (i.e., reading time through X-ray) as a function of shift pattern and time condition. As a result, highly experienced screeners (experts) showed high workload during the morning shift, while lowly experienced screeners (less-experts) reported high workload during the full-day and the afternoon shifts. In addition, less-experts took a longer time to inspect the baggage when they worked for the full-day and the afternoon shifts. Particularly, in the last time slot of the full-dat shift, expert screeners had a high workload, while both groups showed a high-level of workload at around 17:30 in the afternoon shift.

• 한국환경복원기술학회지
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• 제16권5호
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• pp.59-69
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• 2013

Global warming also has effects on the phenology. The limitation of phenology study is an acquisition of phenology data. Satellite images analysis can make up limitation of monitering data. This study is to analyze spatial distribution and characteristics of phenology changes using MODIS images. Research data collected images of 16 day intervals of 11 years from year 2001 to 2010. The data analyzed 228 images of 11 years. It can figure out changes of phenology by analyzing enhanced vegetation index of MODIS image. We made a comparison between changes of phenology and flowering of cherry blossoms. As a results, Startup of season spatially was getting late from southern area to north area. Startup of Phenology was foreshortened 13 days during 11 years, and change ratios of cherry blooming was getting more faster from 0.18 dat to 0.22 day per year during that same period.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 D
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• pp.2821-2823
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• 2002

In this paper we propose the Multi-FNN (Fuzzy-Neural Networks) for optimal identification modeling of complex system. The proposed Multi-FNNs is based on a concept of FNNs and exploit linear inference being treated as generic inference mechanisms. In the networks learning, backpropagation(BP) algorithm of neural networks is used to updata the parameters of the network in order to control of nonlinear process with complexity and uncertainty of data, proposed model use a HCM(Hard C-Means)clustering algorithm which carry out the input-output dat a preprocessing function and Genetic Algorithm which carry out optimization of model The HCM clustering method is utilized to determine the structure of Multi-FNNs. The parameters of Multi-FNN model such as apexes of membership function, learning rates, and momentum coefficients are adjusted using genetic algorithms. An aggregate performance index with a weighting factor is proposed in order to achieve a sound balance between approximation and generalization abilities of the model. NOx emission process data of gas turbine power plant is simulated in order to confirm the efficiency and feasibility of the proposed approach in this paper.

• 대한의용생체공학회:의공학회지
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• 제18권1호
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• pp.17-24
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• 1997

We have developed a patient monitoring system including module-based bedside monitors, interbed network, central stations, clinical workstations, and DB servers. A bedside monitor with a color LCD can accommodate up to 3 module cases and 21 different modules. Six different physiological parameters of ECG, respiration, invasive blood pressure, noninvasive blood pressure, body temperature, and arterial pulse oximetry with plethysmoyaph are provided as parameter modules. In a single bedside monitor, modules and a module controller communicate with IMbps data rate through an intrabed network based on RS-485 and HDU protocol. At the same time, it communicates with other bedside monitors and central stations through interbed network based on 1 OMbps Ethernet and TCP/IP protocol. Central stations using 20" color CRT monitors can be connected with many bedside monitors and they display 18 channels of waveforms simultaneously. Clinical workstations are used mainly for the review of patient datE In order to accommodate more advanced data management capabilities such as 24-hour full disclosure, we have developed a relational database server dedicated to the patient monitoring system. Software for bedside monitor, central station, and clinical workstation fully utilizes graphical user interface techniques and all functions are controlled by a rotate/push button on the bedside monitor arid a mouse on the central station and clinical workstation. The entire system satisfies the requirements of AAMI and ANSI standards in terms of electrical safety and performances.nces.