• The KIPS Transactions:PartC
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• v.9C no.2
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• pp.213-220
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• 2002

Distributed competing system gives a new system architecture to be taken into consideration for solving the problems of interoperability of heterogeneous systems. In the present paper, CORBA based on multi-threaded interoperates with software blocks at physically isolated hardware. We show how archives optimal CORBA system from analysis of required functions, implementations of protocols and benchmarking of system performance in the Open Multi-service Network System Environment. The core features of our CORBA system are restricted Quality of Service based on priority, timeout service and exception status information notify to the related software blocks. And the objectives are design and implementation of high performance multi-threaded middleware and satisfied with extendibility, flexibility and stability of CORBA platform.

• Journal of Software Assessment and Valuation
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• v.16 no.2
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• pp.53-62
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• 2020

In the end-user domain of an IoT environment, there are more and more intelligent M2M devices that provide resources to create and share application services. Therefore, it can be very useful to manage trust by transferring the role of the existing centralized service provider to end users in a P2P environment. However, in a decentralized M2M computing environment where end users independently provide or consume services, mutual trust building is the most important factor. This is because malicious users trying to build malfunctioning services can cause security problems in M2M computing environments such as IoT. In this paper, we provide an integrated analysis and approach for trust evaluation of M2M application services, and an optimized trust evaluation model that can guarantee reliability among users of the M2M community.

• Journal of the Institute of Convergence Signal Processing
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• v.23 no.4
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• pp.234-240
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• 2022

This paper proposes a customized AI exercise recommendation service for balancing the relative amount of exercise according to the working environment by each occupation. WISDM database is collected by using acceleration and gyro sensors, and is a dataset that classifies physical activities into 18 categories. Our system recommends a adaptive exercise using the analyzed activity type after classifying 18 physical activities into 3 physical activities types such as whole body, upper body and lower body. 1 Dimensional convolutional neural network is used for classifying a physical activity in this paper. Proposed model is composed of a convolution blocks in which 1D convolution layers with a various sized kernel are connected in parallel. Convolution blocks can extract a detailed local features of input pattern effectively that can be extracted from deep neural network models, as applying multi 1D convolution layers to input pattern. To evaluate performance of the proposed neural network model, as a result of comparing the previous recurrent neural network, our method showed a remarkable 98.4% accuracy.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.580-581
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• 2021

There are various Location-Based Services(LBS) that apply GPS technology in mobile devices such as smart-phone and tablet. In this paper, we designed non-face-to-face oriented LBS software in the reality that non-face-to-face services are increasing due to COVID-19. The proposed model searches location information for trading goods or services and utilizes information identified in real time. The proposed scheduling and priority control algorithm provides efficient service allocations and simulation was performed based on web/app to verify this. While commercialized LBS platforms focus on used goods transactions, the designed method is different in that it provides non-face-to-face services and not-direct transactions between individuals. It provides a wide range of transactions and services to users such as small business owners and franchises.

• Journal of Internet Computing and Services
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• v.25 no.1
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• pp.39-48
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• 2024

Due to the outbreak of COVID-19, the domestic disinfection and quarantine market has grown, and the demand for disinfection operators who want to recruit disinfectants and disinfectants who want to work has increased, but it is not easy to find jobs. In addition, there is a need for a system that can automate or efficiently manage work by hand-recording and writing a disinfection record for disinfection work. Therefore, in this paper, an O2O disinfection service system is designed using the MVC pattern and implemented through MySQL, Ejs/BootStrap view, and Node.js. Additionally, it connects with AWS cloud services so users can use the system anytime, anywhere. Through the proposed O2O disinfection service system, we hope to solve the difficulties of recruiting personnel in the domestic disinfection station market and improve the existing inefficient disinfection work process.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.9
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• pp.337-346
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• 2015

There is great need for efficient user rights management method to provide a flexible service on variety protocols, domains, applications of IoT environments. In this paper, we propose a IoT service platform with CapSG to provide efficient access control for IoT various services of the environment. CapSG uses a token including authentication and access rights to perform authentication and access control service entity providing services. In addition, the generated token for service management, delegation, revocation, and provides a function such as denied. Also, it provides functions such as generation, delegation, disposal and rejection for service token management. In this paper, it provides the flexibility and efficiency of the access control for various services require of the IoT because of it is available to access control specific domain service by using the token group for each domain and is designed to access control using specific service token of tokens group.

• Korean Journal of Community Nutrition
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• v.15 no.1
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• pp.108-123
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• 2010

The purpose of this study was to investigate school food service satisfaction and menu preferences of high school students in Iksan, Cheonbuk area. Self-administered questionnaires were completed by 692 high school students. Data was analyzed by SPSS 11.5 statistical software. Significant differences between genders were tested by the $X^2$ -test or t-test. The mean satisfaction score with school food service were 2.8 points out of 5 points. The satisfaction scores for menu (2.8 points) and food temperature (3.1 points) were low, but satisfaction with hygiene and facilities (2.7 points) and service (2.6 points) were lowest. The reason that high school students left food was 'the food taste is not good' (65.3%). The school food service areas needing improvement according to the subjects were food taste (39.3%), hygiene (24.3%). The mean score for menu preference was 3.7 points. The highest menu preference menu for the rice category was stirfried rice (bokeumbap), for the soup was meat soup, for the kimchi was Korean cabbage kimchi. Based on the results we made the following suggestions: To increase the satisfaction with school food service, changes in the school food service policies are needed at the government and school levels. Efforts should be made to improve the taste of school food. The school food service menu should be improved by taking into account the preferences of the users. There is also a need for the development of nutrition programs like nutrition consulting linking students and family, and nutrition camps that will encourage correct dietary habits.

• The KIPS Transactions:PartA
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• v.14A no.7
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• pp.409-420
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• 2007

Software adaptation may be required to interact between heterogeneous platforms and to react to rapid change of environment in ubiquitous computing. Web service provides a way to use heterogeneous and distributed services or resources to utilize and organize them. But it is not easy to retrieve appropriate services when we search services because web service lacks of semantic information. Semantic web service provides additional information of services, but it does not support a method to match them in various ways. We can adapt and extend web applications by using web service, but a method for management and administration is still needed. Therefore in this paper, we propose a framework for dynamic growing of web service applications based on ESB(Enterprise Service Bus) and agent and provide a prototype to show its usefulness.

• Journal of the Korean Society of Food Culture
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• v.14 no.4
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• pp.305-317
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• 1999

An attempt was made to provide valuable information to improve service quality and customer satisfaction for in-flight catering service. The customers' demographic characteristics that impact on service quality and customer satisfaction were examined for a group of customer. 474 customers who have been used the airplane within 1 year were participated in this study. Statistical analysis was performed using SAS software program (version 6.01) for descriptive analysis, factor analysis, t-test and ANOVA. The results of the study can be summarized as follows: 1. Service Quality in In-flight catering was assessed on the basis of 18 service quality attributes and 5 dimensions derived from a factor analysis. After comparing customers' perception to customers' expectation regarding in-flight service quality, the quality of dimensions for 'meals', and 'sanitation' were not showed any significant differences. However, the expectation for dimensions of 'diversity of menu', 'providing information', and 'the degree of concern to the customers' were rated significantly higher than the perception for those. 2. Among the demographic variables, age and gender had highly influences on the customers' expectation and perception regarding service quality and customer satisfaction. 3. The korean food that the customers wanted to have for in-flight meals was investigated. Among the kinds of gruel(jook), abalone gruel(jeonbok-jook), pumpkin gruel(hobak-jook), and pine-nut gruel(jat-jook) were chosen to have for in-flight korean meals. It was rated that the preferences for beef soup(sogogikook), hot spicy beef soup(youkgaejang), brown sea-weed soup(miyoukkook) were higher than others in soup group. The preferences for boiled rice with assorted mixture(bibimbab) showed the highest and beef and rice soup(seoleongtang), boiled rice with four the staple cereals(ogogbab) were preferred higher than the others in main dish group. Bulgogi was rated the most popular dish. Korean style punch with omiza(whachae), sweet rice dish(yaksik) and fried glutinous rice cake(gangjeong)showed high preferences in dissert.

• Journal of Digital Contents Society
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• v.13 no.4
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• pp.477-482
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• 2012

The mVoIP service is the technology which focuses on the wireless data service as the IP network having the transmission rate of 100 Mbps classes on the high-speed middle of movement through the WiFi, WiBro and 3G mobile radio communication network, and etc. and is developed. Since 2010, the mVoIP (mobile VoIP) service shows the rapid growth due to 4G-LTE service seriously disclosed from July with the Smart phone and 2,011 it begins to be rapidly popularized. In this research, additionally the mVoIP service industry activation plan is presented with the trends of technology development including the chip-set/module/terminal, etc. based upon local and foreign market trend searchlight through the market demand analysis. The mVoIP service downloads App to the mobile apparatus and or can provide the service as the software through the WiFi network. Therefore, the change which is large in the products development aspect is to be have no. Expected to is being provided as the added service in the case of 4G-LTE as a matter of course, the service deployment where it is based on the market principle and demand needs is needed.