• IE interfaces
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• v.25 no.2
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• pp.229-240
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• 2012

Conventional research on customer relationship management(CRM) in general has focused on the effects of individual customer's satisfaction, retention and profit management. However, corporate customers are more profitable than individual customers because of high volume and frequent transactions between companies. In this article, a prototype for a corporate customer relationship management is developed in the postal service. First, the frequency and amount of customers' usage were examined, and thereby the corporate customer rating scheme was established to provide customized service. Second, five different types of usage patterns were determined using clustering analysis. In addition, we presented the rationales behind the five types of patterns. Third, RFM(recency, frequency, monetary) analysis was performed, and then action plans were developed to increase sales. Finally, the prototype software was developed to automatically perform the above analysis using MS Excel program.

• Proceedings of the IEEK Conference
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• 2000.06a
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• pp.13-16
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• 2000

This paper introduces a more effective usage of the limited OVSF cod in compressed mode which is used during inter-frequency/inter-system handover in UTRA(Universal mobile telecommunications system) Terrestrial Radio Access). The usager is to use dynamic common channel which is shared by several users during the compressed mode.

• Korean Management Science Review
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• v.33 no.1
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• pp.17-33
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• 2016

This study investigated the relationships among proper types of e-commerce, patterns of inter-organizational information flow (IIF), benefits of e-commerce, and supply-chain performance. In IIF, it was empirically observed that environmental competition positively influences the frequency of IIF, and environmental uncertainty has a positive impact on the quality of IIF. It was also empirically confirmed that only quality of IIF has effects on the usage levels of e-procurement as well as e-partnerships. Through regression analyses and cluster analysis, it was found that under high degrees of the frequency and quality of IIF, the benefits of e-commerce are vastly realized in the firms that highly utilize e-partnerships. The results of this study also showed that when the degrees of quality of IIF are high, the levels of benefits of e-commerce are increased in the firms that employ e-procurement. The moderating effects of buyer and supplier firms' abilities on the relationships between patterns of IIF and usage levels in various types of e-commerce were empirically examined. According to the results, the moderating roles of buyer firms' capabilities and suppliers' abilities were partially demonstrated. Finally, it was found that the realization of benefits of e-commerce can lead to the improvement of supply-chain performance.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.87.2-87.2
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• 2011

Many type of fuel cell stacks have been developed to improve the efficiency of reactants usage. The cascade type fuel cell stack using dead end operation is able to attain above 99% usage of hydrogen and oxygen. It is sectionalized to several parts and the residual reactants which are used previous parts would be supplied again to next parts which have less number of cells in dead end operation stack. The oversupply of reactants which is usually 120%~150% of the theoretical amount to generate current for preventing the flooding effect could be provided to each part except the last one. The final section which is called monitoring cells is supposed to be supplied insufficient the fuel or oxidant that would have some accumulated inert gas from former parts. It makes some voltage drop in the part and the fresh reactants must be supplied to the part for recovering it by venting the residual gas. So the usage of fuel and oxidant is depend on the time and frequency of opening valves for venting of residual gas and it is important to optimize the vent logic for achieving higher usage of hydrogen and oxygen. In this research, many experiments are performed to find optimal condition by evaluating the effect of time and frequency under several power conditions using over 100kW class fuel cell module. And the characteristics of the monitoring cells are studied to know the proper cell voltage which decide the condition of opening the vent valve for stable performance of the cascade type fuel cell module.

• The Research Journal of the Costume Culture
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• v.20 no.6
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• pp.826-837
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• 2012

Recently, hats have been used more frequently as an accessory, contributing to the general image of clothes in men's collections. This study compared and analyzed the frequency and styles of hat usage in men's brand collections according to the collections' images. Types of hats and their frequency of usage in men's clothes were analyzed among 857 collections from 74 brands between S/S 2006 and F/W 2012. This study also examined the relationship between clothes image and type of hats used. Hats were used in 622 out of 857 collections, and 24 different types of hats were used. In 67 collections, hats were used in at least 71% of clothes. The most frequently used hat was the fedora, followed in frequency by the beanie, cap, bowler, and high hat. The styles of hats in collections varied depending on seasons. In S/S season collections, fedoras were often used, while beanies were more common during the F/W season. This study analyzed styles of hats used in formal, casual, uniformed, and deformed images. Beanies and fedoras were frequently used for the formal image; fedoras, beanies, and plat caps were often used for the casual image; more than 3 types of hats were used together for the uniformed image; and design hats and hats in various styles were used for the deformed image. The results show that hats of various styles were used in collections to express the image of clothes.

• The Korean Journal of Food And Nutrition
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• v.19 no.2
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• pp.234-241
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• 2006

The purpose of this study was to provide basic information about the usage frequency of foods and menu items that may have microbiological hazards in elementary school foodservice operations in order to prepare a sanitation management manual for the foodservice production process. Menus from 200 elementary school foodservice operations from June 2004 were analyzed. An analysis of the foodservice production process of the menu revealed that the following processes were used: heat process(63.9%), non-heating process(28.1%), and after-heating process(8.0%). The cooking methods used for side dishes were: Stir-frying(19.9%), Saenchae(15.6%), Jorim(15,1%), Sukchae(13.1%), Frying(11.3%) and so on. Overall, 85 menu items known to include microbiological hazards were offered a total of 3,537 times; they were Doegi-bulgogi(7.0%), Bibim-bap(5.2%), Oi-saengchae(4.6%), Kongnamul-muchim(4.2%), Ddeok-bokkeum(4.0%), Japchae(3.7%), and so on. To serve safe and hygienic foods, menus including microbiological hazards should be planned very carefully. Furthermore, if a menu is high in microbiological hazards and frequency, the manuals of sanitation management should be applied more thoroughly.

• Journal of Korea Foundry Society
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• v.41 no.1
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• pp.11-15
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• 2021

Scrap steel used as a charge material in melting process of cast iron foundry is mostly press scrap. The press scrap usually causes several problems including energy loss, workability, safety, and so on. By charging the shredded scrap instead of the press scrap, it is expected that the above-mentioned problems can be solved. In this study, the power basic units to produce cast iron by using the press and shredded scrap are compared in 3t/h medium-frequency induction melting furnace. Charging the shredded scrap instead of the press scrap was confirmed that the power basic unit is improved by about 15%. The characteristics and restrictions of the usage according to the shape and size of scrap steel were considered.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11A
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• pp.924-932
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• 2011

In this paper, we propose a possibility of usage of carrier superpositioning scheme for a specific slow frequency hopping(SFH) transmission method for the satellite data link in which all of hopping carriers have to be synchronized to DSM transponder of our previous work and usage of frequency diversity in the saved frequency to overcome the SFH disadvantage against jammer. We have analyzed anti-jamming performance and LPI performance and confirmed that the proposed scheme can support data service with 18.5dB processing gain against the worst case partial band jamming and give 2.5dB gain in the LPI performance against D&M detector which can estimate the data rate of unknown signals.

• Journal of the Korean housing association
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• v.15 no.1
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• pp.175-183
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• 2004

The purpose of this study was to identify the actual condition of residential environment for the elderly residing in Daejeon. The data were collected through interviews and structured questionnaires. The sujects were 583 elderly people over the age of 65 in Daejeon. Sociodemographic characteristics, living characteristics, housing characteristics, neighborhood environment types, actual usage condition of neighborhood environment, relationship between sociodemographic characteristics and actual usage of neighborhood environment, actual condition of unit interior, were surveyed. The data were analyzed with frequency, percentage, χ²-test, mean using the SPSS package. The major findings were as follows. Features of unit interior which pointed generally were deterioration, soundproofing and size. Features of unit interior which need to be carefully planned were removal of height difference of entrance, removal of the thresholds, installation of emergency bell and room heating control facility. The facilities provided highly within the subject's residential environment were the eldery facility, church, hospital, bank, restaurant, beauty salon/barbershop, supermarket. and the facilities provided lowly were recreational facility, library, elderly school.

• International Journal of Knowledge Content Development & Technology
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• v.4 no.1
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• pp.53-78
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• 2014

As instances of private information leak increase, taking steps to protect such information becomes a necessity. In this study of public library patrons, we strove for a comprehensive understanding of library usage records to suggest viable solutions for private information safety in public libraries. To this end, we investigated the patrons' understanding of library usage records and determined the relationship between different user characteristics and privacy knowledge or leaks. The results show that a high number of patrons perceived these records as their own private information, but that there was no necessity for legal procedures or consent for the use of these records. Also, even though the understanding of these usage records showed that there was a relationship between the frequency of library visits and leaks of personal information, the correlation was not particularly strong.