• Journal of Construction Engineering and Project Management
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• v.6 no.3
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• pp.1-7
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• 2016

The purpose of this paper is to develop a model for selecting the best contractor in the Gaza Strip using the Artificial Neural Network (ANN). The contractor's selection methods and criteria were identified using a field survey. Fifty four engineers were asked to fill a questionnaire that covers factors related to the selection criteria of contractors practiced in Gaza Strip. The results shows that the dominant part of respondents (91%) confirmed that the current awarding method "the lowest bid price" is considered one of the major problems of the construction sector, "award the bid to the highest weight after combination of the technical and financial scores" represented 50% of the respondents. The criteria weights were determined based on Relative Importance Index (RII. Ninety-one tenders(13 projects) were used to train and test the ANN model after re-evaluating the contractors depend on the weights of factors to select the best contractor who achieves the highest score. Neurosolution software was used to train the models. The results of the trained models indicated that neural network reasonably succeeded in selection the best contractor with 95.96% accuracy. The performed sensitivity analysis showed that the profitability and capital of company are the most influential parameters in selection contractors. This model gives chance to the owner to be more accurate in selecting the most appropriate contractor.

• Proceedings of the Technology Innovation Conference
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• 2006.02a
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• pp.131-149
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• 2006

The increasing number of mobile phone users has caused the increasing number of mobile internet subscribers since the 2000s. However, there are little studies on commercial transactions through mobile internet by contraries of abundant studies on the traditional offline and online commerce. This paper aims to find out some factors affecting customer satisfaction in the mobile commerce. For this purpose, influential factors were drawn out by comparing mobile commerce with e-commerce and a more systematic framework was developed. 6 factors were proposed such as mobile internet experience, perceived content Quality, perceived ease of use, perceived price level, perceived system Quality and perceived security level. Initially, they have effects on the customer satisfaction, and then, they have relationships with customer complaint and customer loyalty. In this paper, a Questionnaire survey was conducted. And a general structural equation model was applied to empirically test the proposed research model which is based on the relationships among the 6 factors and customer satisfaction, customer complaint and customer loyalty. This study will be useful to firms providing services of mobile commerce, because it can find out some influential and significant factors of the mobile commerce.

• The Journal of the Convergence on Culture Technology
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• v.2 no.4
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• pp.49-54
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• 2016

Development of AR/VR has expanded computer games from indoor static contents to outdoor dynamic contents. The syndrome of 'Pokemon Go' which is a representative AR game was born, and Nintendo's stock price shot up a massive 120%. Although some people gained profits, new damages are emerging including illegal intrusion or road accidents because it is a type of game to visit real locations. There are reported about 114 thousand road accidents related to the game. This study aims to examine the trends of AR game in 2016 and analyze damages and positive cases to suggest a method for preventing accidents due to the AR game, and a business model.

• Proceedings of the Safety Management and Science Conference
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• 2002.11a
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• pp.295-304
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• 2002

This case describes key development challenges and patterns as experienced by Internet Auction Company, Ltd. from the startup stage through IPO to the sale to eBay. Currently an eBay company, Internet Auction Co. continues to pursue new auction systems and substitute distribution systems for the future with a renewed entrepreneurial spirit. In 1997, Mr Hyuk Oh saw a business opportunity in the Internet allowing two-way communications. At that time, the success stories of eBay and Onsale in the United States were good stimuli to his startup of an auction site. He opened the Website in April 1, 1998 after four months of development efforts. Auction has merit more than other shopping malls. First, it brings about interesting and benefit. Second, it has interactive trade system. Third, customers will trade for reasonable price through direct own will of them. Fourth, Auction's model brings about multitude sale through aggressive sales. Even if Network Marketing has socially negative effect in case of inappropriate use, it is good mood for further business. In case E-Commerce use as useful purpose, it will have competitive priority revenue model.

• The Journal of the Korea Contents Association
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• v.12 no.6
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• pp.56-67
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• 2012

The User Created Contents (UCC) are traded actively on the on-line market. The current pricing policy on the UCC market is the fixed pricing, which is set by the seller once and price never changes again. However market demand and supply are changing hourly, so the studies about dynamic pricing to determine more properly have been carried out. This paper suggests dynamic pricing models for UCC by analyzing the customer's searching pattern. We propose 2 pricing models (trend change-based pricing model and relative pricing model), and experiment various status by controlling system and market variables. We demonstrated our model by computational modeling and simulation. The result of this research can be useful guidelines to increase the revenue and profit of the UCC Market.

• ETRI Journal
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• v.34 no.3
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• pp.308-318
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• 2012

As mobile markets in most developed countries are rapidly coming close to saturation, it is increasingly challenging to cover the cost of providing the network, as revenues are not growing. This has driven mobile operators, thus far mostly involved in facility-based competition, to turn their attention to network sharing. There exist various types of mobile network sharing (MNS), from passive to active sharing. In this paper, we propose a model, based on the supply-demand model, for evaluating the economic effects of using six types of MNS. Our study measures the economic effects of employing these six types of MNS, using actual WiBro-related data. Considering lower service price and expenditure reduction, the total economic effect from a year's worth of MNS use is estimated to be between 513 million and 689 million USD, which is equal to three to four percent of the annual revenue of Korean mobile operators. The results of this study will be used to support the establishment of a MNS policy in Korea. In addition, the results can be used as a basic model for developing various network sharing models.

• 사회경제평론
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• no.38
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• pp.51-83
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• 2012

Consider an n goods production economy. Assume the equilibrium condition of Sraffa's price system, a balanced growth condition and the goods market clearing conditions. If both equations are given to determine a real wage rate and investment, the economic system is over-determined. It suggests that there exists no long-period equilibrium to satisfy both labor market and goods market conditions. This paper interprets this situation of over-determinacy as a disequilibrium state, and attempts to solve it through disequilibrium dynamics. It constructs a model of accumulation and real wage rates consistent with Lotka-Volterra system, and shows that the overall growth path fluctuates endogenously around a resting point of long-period disequilibrium.

• Korean Journal of Organic Agriculture
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• v.29 no.3
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• pp.285-300
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• 2021

On January 1, 2020, the liquor tax for beer and takju was reorganized from the ad valorem tax to the specific tax. The purpose of the reorganization of the liquor tax announced by the National Tax Service is to improve the quality of the liquor and to resolve unreasonable discrimination between domestic and imported liquor. However, it is necessary to determine whether the National Tax Service's standard for levying the liquor tax is appropriate for the purpose. In this study, the change in the liquor industry is estimated due to the reorganization of the liquor tax using Hicks net price elasticity. In addition, the specific tax for each of the liquors and the alcohol content derived from the social cost minimization model is compared. The main findings are as follows. First, when the liquor tax of beer and takju is converted to the specific tax, social costs increase, and social welfare decrease. Second, if all the liquors are converted to the specific tax, social costs decrease. Third, when comparing specific tax by each of the liquors and the alcohol content according to the social cost minimization model, The specific tax by alcohol content can be considered more appropriate in terms of social cost and the stakeholders in the liquor industry.

• The Journal of Fisheries Business Administration
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• v.44 no.2
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• pp.19-33
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• 2013

China is the world's largest producer of aquatic products and its fishery sector is comprised primarily of aquaculture facilities, both fresh and seawater, and a much smaller wild catch component. The expansion of the aquaculture sector continues to boost China's aquatic output. The increase is attributable to several factors. Among them rapidly growing domestic demand is no doubt one of the most important reasons. Rapid economic growth and rising disposable income are influencing domestic consumption and the economic recovery of major import markets is further stimulating consumption of China's aquatic products. This paper tries to examine the status, trend and reasons of consumption of aquatic products in China. Based on the analysis on the consumption of aquatic products and its change, this paper utilizes panel regression model to estimate the affecting factors of aquatic products consumption in China. By using panel data between 1997 and 2010, the results indicate that income, urbanization, aging and dummy variable have positive effects and fish price index has negative effect on China's aquatic products consumption as predicted. However, effects of meat consumption and education on fishery consumption are totally opposite with our predictions. In other words, it turns out that meat consumption has positive effect on fish consumption while education turns out to have negative effect. Finally the member of household does not show any significant effect on consumption of aquatic products in China.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.5
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• pp.769-782
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• 1996

This study intends to contribute to developing an effective marketing strategy targeting women in their 40's and 50's by classifying them into social classes and analyzing their wearing and purchasing behavior. The subject of this study are 344 women in their 40's and 50's living in Seoul, and the model sampling is done by allotment sampling. Modified survey based on references and former studies is used, and SAS package is used for analysis. The results of data analysis are as follows: 1. Women in their 40's and 50's are classified into 3 social classes, and the most influencial factor in the classification of social class is found to be total monthly income. 2 Clothing image of which each social class wear are proven to be significantly different among 3 classes. However, specific garment styles they wear are proven not to be significantly different. 3. Clothing purchasing behavior factors such as informants, clothing selection standards, store selection standards, place of purchase, shopping time, frequency of purchase, price of purchase, and paying methods are proven to be significantly different among 3 social classes. 4. Marketing strategies for each social class are provided based on these results.