• Korean journal of food and cookery science
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• v.26 no.3
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• pp.252-262
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• 2010

This study was conducted to evaluate the sanitary performance and education of elementary and middle school food service employees, by administering questionnaires to 358 elementary school food service employees and 171 middle school food service employees in Seoul. The collected data were subjected to descriptive analysis and $X^2$ tests using the SPSS package program. On the questionnaire, items pertaining to personal hygiene, ingredient control, process control, safety management, and sanitation education were used to measure sanitary performance, with a maximum possible rating of 5 per each category. The results can be summarized as follows. Elementary school food service employees' had the following sanitary performances scores: personal hygiene(4.75), ingredient control(4.82), process control(4.73), safety management(4.69) and sanitation education(4.29). Middle school food service employees' had the following performance ratings: personal hygiene(4.62), ingredient control(4.71), process control(4.71), safety management(4.61) and sanitation education(4.05). In the elementary school employees, 59.8% received regular sanitation education once per month, while 67.3% of middle school employees received regular sanitation education more than once per month. At the elementary schools, food service sanitation education was conducted verbally(39.4%), while middle school sanitation education was principally carried out through the distribution of leaflets(41.5%). The average effectiveness scores for food service verbal education were 2.97 out of a possible 5 at the elementary schools and 2.94 out of 5 at the middle schools. In both elementary and middle schools, the majority of the employees attributed the low level of sanitation knowledge in food service to a lack of facilities and equipment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.9
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• pp.6260-6268
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• 2015

In LTE-Advanced that different networks coexist, it is considered that it is actually difficult to provide service continuity with a procedural and static control method applied to the existing voice service. This paper suggests Service Self-Organization to support the service continuity effectively based on SON. It means a method in which a subscriber's terminal collects information about its current condition and base station around, and a base station, through the data collected by monitoring inner or adjacent base station, shares related data and converges, controlling service continuity on its own. In other words, as context information of mobile terminal and base station changes, set-up of related functions such as ISHO, cell selection, source allocation, load control, and QoS mapping is adapted; each function fits into the change, exchanges the process of reorganization, and interacts; these actions go toward to satisfy service continuity. Simulation results show that it provides better performances than the conventional one with the measure of resource utilization rate and outage probability.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.6
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• pp.1265-1270
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• 2011

Different wireless technologies have been developed for various mobile applications. To offer seamless service in next mobile communication systems, it needs handoff service between heterogeneous mobile access networks. A high data rate handoff call from WLAN to cellular mobile network can increase rapidly the blocking probability of BS of cellular mobile network. To solve this problem, this paper proposes a new handoff scheme based on user service profiles. The performances of the proposed scheme are evaluated using computer simulations.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.5
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• pp.459-464
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• 2016

The mobile communication service is widely used and the repeaters is rapidly increasing because of the extending service areas. we propose a new Signed CMA(: Constant Modulus Algorithm) algorithm for ICS(: Interference Cancellation System) as a larger service area of mobile communication service. The proposed Signed CMA algorithm improved performances by adjusting step size values. We showed that the proposed algorithm could improve the Mean Square Error(: MSE) performance of Signed CMA. MATLAB(: Matrix Laboratory) is employed to analyze the proposed algorithm and to compare it with the experimental results. At the convergence of 1000 iteration state, the MSE(: Mean Square Error) performance of the proposed Signed CMA algorithm with step size of 0.0065 is about 5 dB better than the conventional CMA algorithm.

• Korean journal of food and cookery science
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• v.22 no.3 s.93
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• pp.355-362
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• 2006

The purpose of this study was to investigate the influences of tangible clues on university students' perceived risks and satisfaction at family-restaurants in Seoul. The performances of 3 tangible clues(physical evidence, employee, service process) negatively influenced the student's perceived risks. This result indicated that tangible clues can reduce the negative characteristics of service (intangibility, inseparability, perishability and variability) toward student customers at family restaurants. Meanwhile, financial risk, performance risk and social risk negatively influenced their overall satisfaction. Performance risk had the strongest negative influence on student customers' overall satisfaction, indicating that university students were much more interested in performance and utility about menu, food and service quality than in other factors at family restaurants. As a result, food-service corporations need to manage suitably various tangible clues as an important marketing strategy to diminish their customers' perceived risk and raise their satisfaction.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.48-53
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• 2008

The performances of the building service equipment relay on the individual superintendent's share for the assessment of performance, fault detection, deterioration diagnosis of the building service equipment. A major use of building energy management system(BEMS) is for monitoring plant and building's energy consumption. National building management system (N-BMS) presented in this study links buildings into a network group in order to monitor and control the buildings. How to construct the N-BMS was considered to save energy resource and to conserve performance of building service equipment. The FEMIS, facility, energy/environmental management & information system, for building service offer management process integrated with BAS, FMS and EMS and so on.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.4
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• pp.395-405
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• 2019

The government has strengthened the system of restricting participation of large corporations to limit participation in national information system construction projects and to increase participation of SME software companies. This study analyzes the financial performances of small and medium sized IT firms in Korea three years prior and 3 years after the restrictions on participation of large firm. A sample of 121 small and medium-sized IT services firms were classified into 3 groups and statistical techniques (T-test and one-way ANOVA) were used for the purpose of the analysis. In the three years after the restriction of participation of large corporations, the total assets and sales of the medium and small IT service firms were positive, but the operating profit and net profit were negative. There were many worries about the introduction of the restriction on the participation of large corporations, but many were stabilized. However, the negative impact was more pronounced for SMEs. Therefore, the reduction effect of SME IT service companies is different from the first legislative purpose of enforcing the restriction system of large enterprises, so we propose to revise the policy.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.119-122
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• 1998

Wireless ATM(WATM) intends to provide a broad range of mobile multimedia services through wireless access by mobility extensions from the fixed ATM-based network. Recently, there have been active researches about new handover techniques to support terminal mobility in WATM. In this paper we classify path reestablishment schemes into full reestablishment, path rerouting with a static COS, path rerouting with a dynamic COS, and path extension. For a backward lossy handover procedure, we analyze and compare the performances of path reestablishment schemes in terms of delay, service disruption time and cell loss.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.95-98
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• 1998

In this paper, we propose a cell scheduling algorithm for ABR traffic in ATM multiplexer. Proposed Algorithm can support ABR service more efficiently than existing WRR and DWRR algorithm. We evaluate the performances of proposed algorithm through computer simulation. Also, we model the VBR and the ABR traffics as ON/OFF source, and the CBR traffic as a Poisson source. And the simulation shows that proposed algorithm better performance over other cell scheduling algorithm in tem of mean cell delay time.

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.514-518
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• 1988

The switching system and transport will be developed and serve as hybrid switching system and link respectively according to the needs of mixed voice and data service in ISDN era. This paper describes a theory of optimal band width allocation in multiplexing voice and nonvoice traffic, and analyzes traffic performances on a model network.