• The KIPS Transactions:PartA
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• v.9A no.4
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• pp.413-420
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• 2002

It it essential to get the exact location information of products for a warehouse management. It is very hard, however, to know the location of products which change their location in warehouse frequently This causes the effective warehouse management to be almost impossible. In this paper, we suggest a new location management system for such a SKU(Stock Keeping Unit) with high mobility. The system is composed of RFID (Radio Frequency IDentification), a management terminal with wireless LAN, mobile devices (Cellular Phone & PDA), and a central management system. As a model of a SKU with high mobility, we selected a used-car stored in a large-scale warehouse. We designed and implanted used-car location management system. After analyzing the operations of each position in used-car warehouse where the system will run, we implemented each function. This research shows that an embedded system with wireless LAN is able to know the status of coming in and cut and location of a SKU with high mobility in warehouse very accurately in real time. Therefore, it makes the warehouse to be controlled systematically.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.2
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• pp.343-350
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• 2015

This paper presents a context recognition method using environmental sound signals, which is applied to a mobile-based client monitoring system. Seven acoustic contexts are defined and the corresponding environmental sound signals are obtained for the experiments. To evaluate the performance of the context recognition, MFCC and LPCC method are employed as feature extraction, and statistical pattern recognition method are used employing GMM and HMM as acoustic models, The experimental results show that LPCC and HMM are more effective at improving context recognition accuracy compared to MFCC and GMM respectively. The recognition system using LPCC and HMM obtains 96.03% in recognition accuracy. These results demonstrate that LPCC is effective to represent environmental sounds which contain more various frequency components compared to human speech. They also prove that HMM is more effective to model the time-varying environmental sounds compared to GMM.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.4
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• pp.9-16
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• 2020

Pronunciation recognition systems that use only video information and ignore voice information can be applied to various customized services. In this paper, we develop a system that applies a Bayesian classifier to distinguish Korean vowels via lip shapes in images. We extract feature vectors from the lip shapes of facial images and apply them to the designed machine learning model. Our experiments show that the system's recognition rate is 94% for the pronunciation of 'A', and the system's average recognition rate is approximately 84%, which is higher than that of the CNN tested for comparison. Our results show that our Bayesian classification method with feature values from lip region landmarks is efficient on a small training set. Therefore, it can be used for application development on limited hardware such as mobile devices.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.9
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• pp.2340-2349
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• 2009

In this paper we proposed a hopping routing scheme to resolve the hot spot problem for periodic monitoring services in wireless sensor networks. Our hopping routing scheme constructs load balanced routing path, where an amount of energy consumption of all nodes in the sensor networks is predictable. Load balanced routing paths can be obtained from horizontal hopping transmission scheme which balances the load of the sensor nodes in the same area, and also from vertical hopping transmission scheme which balances the load of the sensor nodes in the other area. The direct transmission count numbers as load balancing parameter for vertical hopping transmission are derived using the energy consumption model of the sensor nodes. The experimental results show that the proposed hopping scheme resolves the hot spot problem effectively. The efficiency of hopping routing scheme is also shown by comparison with other routing scheme such as multi-hop, direct transmission and clustering.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.9
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• pp.649-660
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• 2009

To deliver services suitable to user's situation in the ubiquitous environment, the researches on realizing new services by combining existing ones have been continuously increased. But, it is difficult to provide the personalized services to each user located in the ubiquitous service space where multiple users coexist. In this paper, we propose a service composition model based on user-centered service scenarios and a system for providing personalized services through finding services suitable to user's situation and combining them. The proposed system supports a simple service discovery protocol for finding services from heterogeneous smart objects with limited computing power in the ubiquitous environment. The system aggregates and stores various service scenarios and data derived from users and executes the appropriate services for users. We design and implement a prototype system for the mobile personal device.

• Journal of Korea Multimedia Society
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• v.10 no.2
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• pp.278-287
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• 2007

Even though a variety of types of multimedia data are being used on the basis of user characteristics and demands, all devices do not always support playing all multimedia data. Accordingly, a multimedia transcoder is used to create media suitable for each environments. This is due to the dissimilarity between the source QoS and the target QoS. Therefore, we need to consider adapting the two dissimilar QoS. Therefore in this paper, we create a suitable application-specific transcoding path with unit transcoders before performing the media transcoding in consideration of source QoS and target QoS. and the created transcoding path performs the transcoding. Here, creating a UTR(Unit Transcoder) conversion path that considers the transcoding possibility and the minimum of the UTR will allow the playback of various multimedia data with convenience. and The consideration of QoS allows users to use the multimedia easily.

• Journal of Korean Clinical Nursing Research
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• v.25 no.3
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• pp.294-302
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• 2019

Purpose: The purpose of this study was to investigate the wage structure of hospital nurses in Korea and to analyze the factors that determine the level of nurses' wages. Methods: First, a mobile survey on nurses' wages was conducted with a total of 3,742 nurses working in hospitals. A literature review was also done. Second, a regression model was applied to analyze the determinants of nurses' wages. Results: The average monthly wage of 3,742 nurses based on the survey was KRW 3,588,000 and the standardized monthly income of 3,742 nurses was estimated to be KRW 3,364,000 as of the end of 2018. The results of regression analysis(R²=61.7%) showed that gender, nursing experience, designated night duty, ownership, and number of beds were statistically significant variables for nurses' wages at 1% significance level. The monthly wage of nurses working in total nursing care wards was not significantly different from those working in other wards at 5% significance level. Conclusion: The substantial difference in nurses' wages according to job career, hospital size, region, etc may result in the low proportion of nurses with more than three to five years of service experience and the high turnover of less-experienced workers. Consideration should be given to adjust the gap in wage level and a standard nurse wage system could be effective measures.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.209-215
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• 2019

The purpose of this study is to suggest the development of interactive services and technologies in the media industry. Through the analysis of domestic two-way broadcasting contents service, this study analyzed platform and services type according to service type of terrestrial broadcasting, SO operator and Telco. Also, by identifying the characteristics of interactive programs(open, interactive, personalized, stereoscopic), this study propose important convergence possibilities of the future providers and development plans through supporting technologies and services for each characteristic. In the case of terrestrial broadcasters, ARS, web sites and mobile apps were mostly provided in both directions, and SO and satellite broadcasting operators were found to provide diversity in interactive service operation using data domain. In the case of IPTV companies, most of them provide interactive services with additional video or information service through adjustment button or app, and cable TV operators had more adjustment data broadcasting than exclusive use data broadcasts. Therefore, domestic interactive broadcasting service type needs convergence type of revenue model needs and needs to be converted into new competitive interactive broadcasting program service environment.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.101-109
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• 2019

With the rapid development of China's economy, the consumption concept of Chinese consumers has changed, and the purchase intention of consumers is also affected by the origin of the brand. The purpose of this study is to help local enterprises gain more competitive advantages in international marketing activities by improving the image of the country of origin. Based on the theory of clue utilization, this paper constructs a theoretical model of the effect of the image of origin on consumers' purchase intention and puts forward the basic hypothesis. The data were collected, analyzed and processed through questionnaire survey and spss23.0. The results showed that: the image of the place of origin and the perceived value had a significant impact on the purchase intention. The image of origin has significant influence on perceived value. Finally, combined with the empirical research results, relevant marketing strategies and Suggestions are provided for local enterprises. At the same time, it also provides some reference for other countries to sell in China.

• Journal of Digital Convergence
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• v.19 no.4
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• pp.373-381
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• 2021

This study attempted to present a strategic direction that helps in vitalizing the domestic fashion and beauty magazine industry by examining the factors that influence the intention to use the fashion beauty magazine curation service. A survey was conducted on 314 college students in Korea, and the results were derived through a series of analysis processes using the SPSS 21.0 and AMOS 21.0 programs. Technology self-efficacy had a positive effect on perceived ease of use and perceived usefulness, perceived value had a positive effect on perceived usefulness. Technology self-efficacy and perceived value had a positive effect on intention to use, perceived ease of use had a positive effect on perceived usefulness. Perceived ease of use did not have a significant effect on intention to use, but perceived usefulness had a positive effect on intention to use. In order to increase the intention of using the mobile-based fashion beauty magazine curation service for college students, it is necessary to clearly understand the value and usefulness of the curation service.