• IE interfaces
• /
• v.24 no.4
• /
• pp.295-303
• /
• 2011

This paper presents a discrete time optimal asset buying problem with a predetermined final deadline where an available budget is limited. A cost is paid to search for assets called the search cost. A seller who shows up offers a price for the asset and then the buyer decides whether or not to buy the asset by comparing the offered price to his optimal selection threshold. When the budget becomes less than the search cost or the price of the asset the buyer can get a necessary loan with some interests. We clarify the properties of the buyer's optimal selection threshold in order to maximize the expected value of budget which is left after paying all the search costs and the price of the asset at that point in time.

• Journal of Korea Multimedia Society
• /
• v.7 no.12
• /
• pp.1708-1718
• /
• 2004

In this paper, we are concerned with a digital fingerprinting scheme for multi-purchase where a buyer wants to buy more than a digital content. If we apply previous schemes to multi-purchase protocol, the number of execution of registration step and decryption key should be increased in proportion to that of digital contents to be purchased in order to keep unlinkability. More worse, most of fingerprinting schemes in the literature are based on either secure multi-party computation or general zero-knowledge proofs with very high computational complexity. These high complexities complicate materialization of fingerprinting protocol more and more. In this paper, we propose a multi-purchase fingerprinting scheme with lower computational complexity. In the proposed scheme, a buyer executes just one-time registration step regardless of the number of contents to be purchased. The number of decryption key is constant and independent of the number of contents to be purchased. We can also reduce the computational costs of buyers by introducing a concept of proxy-based fingerprinting protocol.

• 제어로봇시스템학회:학술대회논문집
• /
• 2001.10a
• /
• pp.74.2-74
• /
• 2001

The availability of endoscope has been increased not only for observing inner parts of body but also for operating. Nowdays, the market of the endoscope has been widely extended and we presume that the value of marketablity will reach to wide. Most of the endoscope equipment is very expensive and as well, it costs a lot to repair or change the specific parts of equipment when it´s out of order on account of carelessness. About 90 percent of the endoscope equipment in the world is made in Japan. Therefore, to buy or repair the equipment, we can´t help outflowing foreign currency. In domestic, the efforts for localization and manufacturing the endoscope equipment are short. This paper shows that captured image from a CCD miniature carema is managed ...

• Fashion & Textile Research Journal
• /
• v.8 no.6
• /
• pp.672-678
• /
• 2006

This study examines the implications of fashion in self-expression or image management among college students in Korea. Socio-demographic factors are considered in addressing following research questions: why Korean college students seek luxury goods; how they recognize the effects of using luxury goods on their image management; whether or not they have purchased counterfeit luxury goods; and why they buy counterfeit goods. In order to explain the relationship between fashion and social class, the study examines various sociological theories including Erving Goffman's dramaturgical approach. The data were drawn from 1419 students from 10 universities nationwide in 2005. Chi-square analyses yields outcomes as follows: Using luxury goods works as a class symbol that gives the users the image of higher socio-economic background; use of counterfeit luxury goods and its symbolic effects in image management do not have significant relationship with socio-economic background.

• Fashion & Textile Research Journal
• /
• v.7 no.3
• /
• pp.277-282
• /
• 2005

This study focuses on the imported silver goods from Japan and investigates the backgrounds of importing, trade items, and the amount of the exchange. This study also investigates the effects of the importing silver on Chosun society. A large amount of silver was imported from Japan and the amount of imported silver reached its maximum in Chosun Dynasty. Japan, on the other hand, imported a large quantity of cotton cloth from Chosun Dynasty. Silver was imported mainly because of the sumptuous moods among the royal family and the aristocracy. The moods were spread out to general people who made them wish for the luxurious and expensive chinese goods. To buy the luxurious goods, a lot of silver was imported from Japan. Importing a large quantity of silver fostered the sumptuous moods and also caused the price increase in the Chosun society. The order of the society became worse because of the individual trades of rich merchants who were closely connected to high officials.

• Journal of the military operations research society of Korea
• /
• v.29 no.1
• /
• pp.43-56
• /
• 2003

This paper is intended to investigate the Build-up Method of SCM(Supply Chain Management) Connection applying EC Standard. SCM helps companies plan and supply to meet customer demand. SCM is the only solution available today that enables an organization to strategize, plan and execute a company's buy, make, move, store, fulfill and service business processes across multiple enterprises for total profitability. The research of modern scientists has thrown new light on the subject. However, the study of SCM for EC Standard has been strangely neglected by critics. Consequently, existing SCM systems, which require to introduce the functions of EC, need to be changed. Summarizations of the main points that have been analyzed in this paper are as follows:. the sharing information for connection and the Rosetta-net standard of the existing SCM system(Order management module(PIP 3A4) of the Rosetta-net specifications for connection by the Rosetta-net). Finally, it shows the process of the gateway for connecting among the existing SCM systems.

• Journal of Families and Better Life
• /
• v.19 no.5
• /
• pp.259-277
• /
• 2001

The purpose of this study was to identify household’s level and standard of consumption and their related variables in order to derive some useful implications for developing sustainable lifestyle. Data were collected from 567 household wives living in Seoul and the five Metropolitan cities in Korea. The results showed that most households owned such goods as central heating system, shower and bath, refrigerator, microwave oven, vacuum cleaner, washer. TV video player, personal computer, mobile phone, and car. They thought that most of the goods were necessary for the desired level of living and has a strong aspiration to buy those goods. This implied a tendency of uniformity in need perceptions and consumption patterns among Korean households. However, level and standard of consumption measured in selected living area differed according to age. education family size, household income, occupation, and the size housing, which showed that different approach was needed for developing sustainable lifestyle according to these variables.

• Journal of Families and Better Life
• /
• v.21 no.2
• /
• pp.61-74
• /
• 2003

Recently, the number of consumers who buy various goods using the shopping channels on cable TV has increased. The objectives of this study are to examine the propensity of consumers to make an impulse purchase through cable TV, and to investigate the factors that influence consumers' impulse purchase. The following was found in this study: (1) The propensity of consumers to make impulse purchases on cable TV is somewhat low, Among sub-areas of impulse purchase, the propensity to make impulse purchase by suggestion is the highest. (2) Among the variables that affect consumers' impulse purchase on cable TV, the most influential variable is the psychological factor, followed by the frequency of shopping on cable TV, positive testimony from consumers who have used the product, and the amount of time spent in watching shopping channels on cable TV, in that order.

• Proceedings of the Korea Inteligent Information System Society Conference
• /
• 2002.05a
• /
• pp.305-314
• /
• 2002

In order to adapt to today's rapidly changing environment and gain a competitive advantage, many companies are interested in CRM(Customer Relationship Management). Especially, the product recommendation system that can be implemented by personalizing the marketing strategy becomes the focus of CRM. In this research, we employed CBR(Case-Based Reasoning) technique that can overcome the limitation of CF(Collaborative Filtering) technique. Our system recommends the books that the customer is very likely to buy next time considering the factors such as 'Personal Features of Customer,' Similarity between Book Categories' and 'Sequence of Book Purchases'. Accuracy of predicting a book-not a particular book, but in the middle level of classification that contains about 190 categories-was about 57%.

• The Transactions of the Korean Institute of Electrical Engineers A
• /
• v.52 no.11
• /
• pp.668-674
• /
• 2003

The electric marketplace is in the midst of major changes designed to promote competition. No longer vertically integrated with guaranteed customers and suppliers, electric generators and distributors will have to compete to sell and buy electricity. Unit commitment (UC) in such a competitive environment is not the same as the traditional one anymore. The objective of UC is not to minimize production cost as before but to find the solution that produces a maximum profit for a generation firm. This paper presents a hi-level formulation that decomposes the UC game into a generation-decision game (first level game) and a state(on/off)-decision game (second level game). Derivation that the first-level game has a pure Cournot Nash equilibrium(NE) helps to solve the second-level game. In case of having a mixed NE in the second-level game, this paper chooses a pure strategy having maximum probability in the mixed strategy in order to obviate the probabilistic on/off state which may be infeasible. Simulation results shows that proposed method gives the adequate UC solutions corresponding to a NE.