• 한국신뢰성학회지:신뢰성응용연구
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• 제8권3호
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• pp.125-134
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• 2008

Global Positioning System(GPS) is prospects item of information infrastructure with internet. Global Positioning System module made by domestic have high technology, but its international competitive power is very weak because of reliability. In this paper, we compare domestic products with foreign advanced products exactly, and confirm excellence of domestic products.

• 한국의류학회지
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• 제23권7호
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• pp.1007-1018
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• 1999

The purpose of this study were : 1) to examine the apparel product purchasing tendency of PC communication and internet users in home shopping 2) to analyze the difference of apparel product purchasing tendency accordint to consumer factors. The data was administered to 160 subjects who had communicated the PC communication and internet. And the data was collected from May through August in 1998. SPSS package was used for analysis and the following methods such as Means Percentage Frequencies Factor analysis Crosstabulation analysis t-test and one-way ANOVA, The results of this study were as follows : 1) The users of PC communication and internet were young and high-education level and a metropolitan area dwellers. They received a purchase offer through catalog PC communication and internet cable TV and paid out credit card Experience to purchasing apparel product of home shopping was very low but intention to purchasing was relative high. item that consumer wanted to buy using home shopping were casual clothing and fashion goods which were not important to fit and without regard to style. 2) Between purchasing apparel product of home shopping and mainly consideration factors were shown to have the significant differences according to age residential quarters whether or not marriage. income level. A metropolitan area dwellers the low-age unmarried and the low-income groups thought much of convenience shopping time and effort's saving. A person of the higher-income and the married thought much of the facility of an exchange or returned goods. A region dwellers were to purchase a speciality product or gift goods. 3) Between purchasing apparel product of home shopping and satisfaction degree were shown to have significant differences according to sex whether or not marriage education level an occupation. The woman than the man was satisfied with the benefit of the shopping time and effort's saving. And the unmarried than the married was satisfied with the benefit of the home shopping's convenience. The higher-education level than the lower-education level was satisfied with the quality guarantee of the product.

• 복식문화연구
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• 제11권6호
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• pp.808-825
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• 2003

The purpose of this study is to research the reasons of this outcome by comparing the consumers purchasing characteristics of the Internet shopping mall and cable TV home shopping. A questionnaire was designed for on-line survey panels residing in Korea and the period of the survey was from July 30 to August 6, 2002. 1362 questionnaires were collected and 665 were chosen. The Frequency, %, t-test, and x2-test was performed using Korean version of SPSS 10.0. The summarized results of this study are as follows: The reasons of purchasing Apparel products through Internet and Cable TV home shopping are low price, time Saving, and convenience. The Item that is purchased most often at the Internet shopping mall is casual T-shirt. In case of the cable TV home shopping, it is inner-wears. Most of the users were satisfied with the home shopping. There are significant difference in ‘inexpensiveness of price’, ‘variety of product’, ‘sufficiency of product information’, ‘easiness of searching product’, ‘security of personal information’, ‘convenience of order’ in the side of consumers satisfaction. The reason of not using the media shopping are as follows: ‘Distrust of the product’ appeared one of the main reason of not using internet shopping mall and cable TV home shopping, accounting for 34.3%(Internet)/25.3%(Cable TV) of all respondents, followed by ‘absence of products(18.7%)’, In case of the cable TV home shopping, ‘lack of necessity of home shopping(24.7%)’ was the main reason.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권8호
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• pp.2948-2966
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• 2014

To promote recommendation services through prediction quality, some privacy-preserving collaborative filtering solutions are proposed to make e-commerce parties collaborate on partitioned data. It is almost probable that two parties hold ratings for the same users and items simultaneously; however, existing two-party privacy-preserving collaborative filtering solutions do not cover such overlaps. Since rating values and rated items are confidential, overlapping ratings make privacy-preservation more challenging. This study examines how to estimate predictions privately based on partitioned data with overlapped entries between two e-commerce companies. We consider both user-based and item-based collaborative filtering approaches and propose novel privacy-preserving collaborative filtering schemes in this sense. We also evaluate our schemes using real movie dataset, and the empirical outcomes show that the parties can promote collaborative services using our schemes.

• 한국잠사곤충학회지
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• 제43권1호
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• pp.29-32
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• 2001

At present, more than 300 races of the Silkworm are conserved and used as valuable genetic resources. But because of the uneffectiveness of manual data management, faster and systematic data base construction is needed. So, development of silkworm genetic resources management program has been begun and the result can be practically used. When developing the program, Visual basic was used for data input system construction, and MS Access for database. IIS(Internet Information System) and ASP(Active Server Page) was also used for searching data and information with Internet Web Server and Web Browser which is comfortable for constructing database and providing information. Data input item consists of 46 practical characteristics such as race name, moltinism, larval period and pupation percentage etc.. And these characteristics are classified with qualitative and quantitative character. Photographs of silkworm, cocoon and other related items were scanned and the image data was recorded on the database.

• International Journal of Internet, Broadcasting and Communication
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• 제7권2호
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• pp.90-95
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• 2015

This paper describes IEC 61727 standard of Photovoltaic (PV) systems -Characteristics of the utility interface. IEC 61727 standard tests include utility compatibility and personnel safety and equipment protection of PV inverter performance functions. Especially utility compatibility part includes test items of 1) voltage, current and frequency, 2) normal voltage operating range, 3) flicker, 4) DC injection, 5) normal frequency operating range, 6) harmonics and 7) waveform distortion, 8) power factor of PV inverter. Also personnel safety and equipment protection part includes test items 1)loss of utility voltage, 2)over/under voltage and frequency, 3)Islanding protection, 4)response to utility recovery, 5)earthing, 6)short circuit protection, 7)Isolation and switching of PV inverter. In this paper, each item of IEC 61727 standard test is studied and analyzed and finally full tested by PV inverter performance function.

• Journal of Information Technology Applications and Management
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• 제12권1호
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• pp.141-155
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• 2005

It is very important that sellers provide reasonable reserve prices for auction items in internet auction systems. Recently, an agent has been proposed to generate reserve prices automatically based on the case similarity of information retrieval theory and the moving average of time series analysis. However, one problem of the previous approaches is that the recent trend of auction prices is not well reflected on the generated reserve prices, because it simply provides the bid price of the most similar item or an average price of some similar items using the past auction data. In this paper. in order to overcome the problem. we propose a method that generates reserve prices based on the moving average. the exponential smoothing, and the least square of time series analysis. Through performance experiments. we show that the successful bid rate of the new method can be increased by preventing sellers from making unreasonable reserve prices compared with the previous methods.

• International journal of advanced smart convergence
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• 제6권1호
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• pp.44-49
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• 2017

In the modern technology era, it is possible to connect objects and the internet anytime and anywhere through IoT of hyper-connected society. Accordingly, a smart shopping cart was designed and realized by applying IoT. Therefore, this paper builds the IoT shopping cart system according to the trend of IoT environment.. When RFID is installed in the Arduino and the tagged item is inserted into the IoT shopping cart, the product information and price are displayed on the Arduino linked Raspberry Pi. We built a web server on the Raspberry Pi to handle this data, and built an App on the smartphone to implement the IoT shopping cart environment. Consumers can receive pricing and product information through smartphone apps through raspberry pie, can make quick calculations through smartphone, and provide various information to consumers through apps.

• 산업경영시스템학회지
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• 제33권3호
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• pp.192-198
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• 2010

To maximize effectiveness of standardization activities, it is essential to set priorities for determined standardization work items in the next generation internet protocol television (NG-IPTV) technologies. In this study, the analytic hierarchy process(AHP) is employed and applied to ranking of NG-IPTV standardization work items as a multi-criteria decision making tool which involves comprehensive surveys. Survey results are analyzed and we identified a useful three level segmentation of standardization strategic plan which shows standardization work item priorities.

• Journal of Computing Science and Engineering
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• 제11권3호
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• pp.100-108
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• 2017

In the field of Internet of Things (IoT), smarter embedded devices offer functions via web services. The Quality-of-Service (QoS) prediction is a key measure that guarantees successful IoT service applications. In this study, a collaborative filtering method is presented for predicting response time of IoT service due to time-awareness characteristics of IoT. First, a calculation method of service response time similarity between different users is proposed. Then, to improve prediction accuracy, initial similarity values are adjusted and similar neighbors are selected by a similarity threshold. Finally, via a densified user-item matrix, service response time is predicted by collaborative filtering for current active users. The presented method is validated by experiments on a real web service QoS dataset. Experimental results indicate that better prediction accuracy can be achieved with the presented method.