• 대한지역사회영양학회지
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• 제10권3호
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• pp.331-340
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• 2005

The purpose of this study was to provide basic data to improve college food service satisfaction with sanitary, environment and service by comparing 2 contract-managed and 2 self-operated college food services in Daejeon and Chungnam area. According to the results, sanitation and environment satisfaction degrees of contract-managed college food services were higher than those of self-operated food services. The satisfaction degrees with service were also higher in contract-managed food services than self-operated food services except the category of quick food delivery. In all categories comprising the food service satisfaction, the satisfaction degrees were lower in female students than in male students. There were more negative self-perceived clinical symptoms in female students than male students. The higher the negative self-perceived clinical symptoms scores were, the lower the satisfaction degrees with food service were, which suggests that かe health state of students was one of the factors that influenced college food service satisfaction. There was no difference between contract-managed and self-operated food services in terms of satisfaction with overall food taste and overall satisfaction degree. The average satisfaction degree for the contractmanaged food services in terms of price relative to food quality was lower than that for self-operated food services. According to stepwise multiple regression analysis, 'overall food taste', 'price relative to quality', 'kindness of employees', 'coping with proposed opinions' and 'quicknless of food delivery' in decreasing order, were the most relatively important attributes for overall satisfaction. There should be further studies on important management factors to improve satisfaction with sanitary, environment and service by self-operated college food service.

• 정보처리학회지
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• 제17권2호
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• pp.18-29
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• 2010

In this paper, we surveyed SSO based security management including the knowledge domain of the area of cloud and its relevant components. Cloud computing refers to the delivery of software and other technology services over the Internet by a service provider. SSO refers to the ability to log on to a single security system once, rather than logging on separately to multiple security systems. Existing SSO solutions in cloud computing environment suggest several methods. SSO-based security Issues illustrate these key items in cloud computing environment such as risks and security vulnerabilities of SSO. SSO supports for multiple and different domains in cloud computing environment.

• 보건교육건강증진학회지
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• 제17권2호
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• pp.35-56
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• 2000

This study is research on physical health and mental health(physical and mental symptom at school) in perceived school environment among adolescents. The study subjects ere selected by senior high school students in seoul and random sampling. The 3,060 subjects were selected 18 schools. The duration for survey was for Nov. 25-Dec. 13, 1998. The reliability of Questionnaire was Cronbach's $\alpha=0.95$. This study used multiple regression through Factor Analysis in SPSS programs. The major findings of this study are as follows: (1) All of Multiple Regression Models were significant. (p<0.001). (2) Physical Mental health is related to gender, personal environment, and economic status. (3) Physical Health is related to perceived school environmental variable (therapeutic teacher-student relationships, classrom climate, and school life satisfaction) among adolescents. (4) Mental Health is related to perceived school environment variables(therapeutic teacher-student relationships, classroom climate, school life satisfaction, teachers' climate, and classmates' attitudes) among adolescents. This study could be used as the basis for the development of educational program, counseling, teacher in-service training, student teacher training and the establishment of educational and health policy.

• International Journal of Computer Science & Network Security
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• 제23권9호
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• pp.8-16
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• 2023

In Japan, high-speed ground transportation service using linear motors at speeds of 500 km/h is scheduled to begin in 2027. To accommodate 5G services in trains, a subcarrier spacing frequency of 30 kHz will be used instead of the typical 15 kHz subcarrier spacing to mitigate Doppler effects in such high-speed transport. Furthermore, to increase the cell size of the 5G mobile system, multiple base station antennas will transmit identical downlink (DL) signals to form an expanded cell size along the train rails. In this situation, the forward and backward antenna signals are Doppler-shifted in opposite directions, respectively, so the receiver in the train may suffer from estimating the exact Channel Transfer Function (CTF) for demodulation. In a previously published paper, we proposed a channel estimator based on Delay and Doppler Profiler (DDP) in a 5G SISO (Single Input Single Output) environment and successfully implemented it in a signal processing simulation system. In this paper, we extend it to 2×2 MIMO (Multiple Input Multiple Output) with spatial multiplexing environment and confirm that the delay and DDP based channel estimator is also effective in 2×2 MIMO environment. Its simulation performance is compared with that of a conventional time-domain linear interpolation estimator. The simulation results show that in a 2×2 MIMO environment, the conventional channel estimator can barely achieve QPSK modulation at speeds below 100 km/h and has poor CNR performance versus SISO. The performance degradation of CNR against DDP SISO is only 6dB to 7dB. And even under severe channel conditions such as 500km/h and 8-path inverse Doppler shift environment, the error rate can be reduced by combining the error with LDPC to reduce the error rate and improve the performance in 2×2 MIMO. QPSK modulation scheme in 2×2 MIMO can be used under severe channel conditions such as 500 km/h and 8-path inverse Doppler shift environment.

• 한국콘텐츠학회논문지
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• 제11권11호
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• pp.413-423
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• 2011

본 연구는 경제적인 가격에 간단하고 신속한 음식을 제공함으로써 전략적으로 포지션닝하고 있는 패스트푸드 유형의 레스토랑에서도 고급레스토랑이나 패밀리 레스토랑의 경우와 마찬가지로 서비스 환경이 고객들의 품질인지에 유사한 영향을 미치는지 알아보고자 하였다. 또한 종업원의 외재적 속성인 복장과 청결의 정도와 서비스 대기시간이 품질인지에 어떤 영향을 미치는지 파악하고자 하였다. 연구의 방법은 SPSS 18.0을 이용하여 요인분석, 신뢰분석을 통하여 연구의 타당성을 입증하였고, 영향정도를 파악하기 위해서는 다중회귀분석을 이용하였다. 연구 결과 서비스 환경과 종업원의 복장 및 청결, 그리고 대기 시간은 서비스 품질인지에 유의한 정(+)의 영향을 미치는 것으로 파악되었으며, 종업원들의 복장 및 청결성이 패스트푸드레스토랑에서 중요한 요인으로 알려져 있는 시간적 요인보다 품질인지에 더 많은 영향을 미치는 것으로 파악되었다.

• 한국정보처리학회논문지
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• 제3권3호
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• pp.581-590
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• 1996

본 논문에서는 복합적인 서비스를 동시에 제공하는 N-ISDN BRI용 멀티미디어통신 단말의 설계고려 사항과 그 시스템 구성 방식을 기술 하였다. 제한된 통신망 전송속도와 컴퓨터 하드웨어내에서 다양한 영상 서비스들을 복합 적으로 동시에 수용하기 위한 서비 스간 제어 및 미디어 처리방법을 제안하였다. 현재 시스템은 N-ISON 하에서 개인용 컴퓨터 기반의 탁상형 시스템으로 개발되었으며, 국내 N-ISDN에서의 충분한 현장 실험을 통해시스 템의 상호 환성 및 안정성을 확인하였다. 본 시스템은 영상회의 서비스를 기본으로 제공하 면서, 동시에 메시지 서비스와 검색 서비스들을 제공할 수 있으며, 아울러 화일 전송 및 고동 작업 환경을 제공한다.

• 통상정보연구
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• 제10권1호
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• pp.375-393
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• 2008

The purpose of this study is to investigate the Chinese investment environment and analyze the actual investment condition of Korean enterprises in China and examine the points at issue. In general, the investment environment in China shows satisfactory progress. China has a multiple and regional extension policy in investment. And the environment for investment changes to insufficiency of company profit, extension of service market, maintenance of legislative system, and insufficiency of preference about foreign company. There are situations of inclining to manufacturing, inclining of region, preference of independence investment, small-sized investment by small and medium enterprises, difficulty of financial assistance, excess of logistic cost, delay of logistic term, difficulty of settlement of legal dispute and difficulty of taking a relative information in investment of Korean enterprise in China. The results of the study indicate mostly that the investment of Korean enterprise into China needs turnover of service trade-tertiary industry, portfolio of investment territory, cooperation with Chinese enterprise through joint venture investment and a large-scale investment for extension of Chinese domestic market.

• 한국컴퓨터정보학회논문지
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• 제13권5호
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• pp.85-94
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• 2008

WLAN, WiBro, cdma2000, HSDPA와 같은 여러 이기종 무선 네트워크 서비스가 늘어나고 무선 서비스를 사용하기 위한 사용자의 선택의 폭도 점점 커짐에 따라 다양한 이기종 무선인터페이스를 동시에 사용하고자 하는 Multiple Care-of Address 방안이 IETF MONAMI6 WG에서 제안되었다. 이 방안을 통해 단말은 다중 인터페이스를 사용하여 동시에 여러 네트워크로의 접속이 가능하다 이처럼 다양한 무선 접속 기술은 All-IP 기반 핵심망에 연결되어 통합되는 형태로 발전하고 있으며 무선 접속 기술의 커버리지에 따라 이기종 무선망이 중첩되어 운영되고 있어, 이에 대한 고려가 요구되고 있다. 이에 따라 4G를 위한 차세대 네트워크와 현존하는 이기종 인터페이스를 지원하는 서비스 프레임워크가 요구되는 실정이다. 본 논문에서는 현재 서비스되고 있는 환경을 고려한 이기종 무선 서비스 프레임워크를 제안하고 여러 인터페이스 특성과 사용자 정의를 고려하여 효율적인 네트워크를 선택하는 수정된 MCoA (Multiple Care-of Address) 방안과 다중 인터페이스 핸드오버 상황에 따른 패킷 손실을 최소화하는 방안을 제안한다.

• 한국조리학회지
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• 제12권4호
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• pp.63-79
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• 2006

This study was conducted to investigate the effect of restaurant environment upon customers' satisfaction and crowdedness awareness from July 4 to 30. Total 800 sets of questionnaire were distributed among major foodservice corporations including 16 restaurants from McDonald, Burger King, Popeyes, KFC, Ritz Carlton, Intercontinental, The Westin Chosun, Hilton, Merriot, Outback Steak House, Bennigans, VIPS, Pizza Hut, Pul-hyanggi(Scent of grass), Nolboo Co., and Our Story. They received 50 sets each to hand out to their customers. Out of total 800 sets of questionnaires, 592 sets (74.25%) were retrieved and underwent the Multiple Regression Analysis. We found the following results from the study. First, among each variable of restaurant environment that had a significant effect on crowdedness, "fast service" and "responsiveness to customer complaints" scored a regression coefficient value 0.381 and 0.325 respectively. Second, among each restaurant environment factor that had a significant effect on crowdedness, "quality of facilities" scored the highest regression coefficient value 0.423 with a standard error score 0.1074, followed by "condition of waiting", "overall ambience" and "service quality" in ascending order. Third, in the analysis of the effect of each environmental factor upon the satisfaction rate, "condition of waiting" showed the highest regression coefficient value 0.3821 with a standard error score 0.4565, followed by "cleanliness", "service quality" and "convenience', in ascending order.

• Journal of Preventive Medicine and Public Health
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• 제24권1호
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• pp.16-28
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• 1991

Service diversification is recognized as an important strategy against turbulent environmental change. This study is designed to find out the trend of service diversification in Korean health care organizations and also to identify factors associated with the degree of service diversification. Data were collected from 69 hospitals out of 71 hospitals with over 300 beds. Important findings are summarized below. 1. Types of diversification are closely related to hospital size. Large hospitals have a tendency to provide sophisticated services requiring specialized skills and equipment, while small hospital have concentrated their efforts on health screening programs. 2. The more competitive and bigger hospitals are, the greater number of services that provide. Also, hospitals operating rational management information systems provide more services. Contrary to the expectation hospitals with a low performance during last 3 years showed more service diversification. 3. A trend of more diversification was observed in hospitals whose chief executive officer used a prospector strategy. 4. A multiple regression analysis revealed that bed size, competitive environment, degree of rational management, and the growth pattern were significantly associated with the service diversification.