• Journal of Digital Convergence
• /
• v.14 no.11
• /
• pp.233-240
• /
• 2016

Information system development projects, have a mechanism for many of the costs generated by a variety of risk factors. In general, the probability that the software project of the information system is carried out successfully in the delivery time is very low. This prediction of a formal cost is needed as the most important factor since it can prevent the project from being failed. However, objectivity of most of the project scale calculation during the calculation criteria is insufficient. Further, it is the actual situation that the management of the base line is not properly made during the project. Therefore, in this paper, we propose a model to calculate the number of steps it takes to develop on the basis of a methodology in an attempt to overcome the limitation of being unpractical in the early stage of the information system development project. It is expected to be a tool to estimate the effort and cost required by the information system development business through these convergence proposals model.

• Journal of Korea Technology Innovation Society
• /
• v.21 no.2
• /
• pp.684-714
• /
• 2018

Contrary to predictions, the market diffusion of smartwatch is proceeding slowly. Smartwatch companies should pursue new strategies to overcome this so-called chasm; however, little is known about smartwatch attributes valuable for target consumers. This study investigates beneficial and sacrificial features influencing overall perceived value of smartwatch, which in turn affects usage intention, and considers moderating effect of personal innovativeness. A total of 323 usable data were analysed using partial least squares. The results show that two benefits (utilitarian and hedonic) and three sacrifices (usability, performance, and finance) significantly impact on usage intention via perceived value. A significant effect of personal innovativeness as a moderator is also observed. Interestingly, the influence of social benefits on perceived value is not supported, which means strengthening image improvement strategies might not be appropriate for the diffusion. In order to overcome the chasm, suitable strategies should be used, and focusing on consumers who are highly innovative are strongly recommended.

• Journal of the Economic Geographical Society of Korea
• /
• v.8 no.2
• /
• pp.195-215
• /
• 2005

This study was carried into execution to analyze Spatial Characteristics of Seoul Business Services Cluster in circumstance of local economic development led by knowledge-intensive business services. The analysis was performed for industrial agglomeration and companies' linkage and network. As the result, there are three business services cluster, including the largest one in Gang-Nam Gu, Seoul, and for last 10 years, there has been increasing development of business services cluster. In the meanwhile, their linkage and network have not been performed briskly. Therefore, from now on, a plan that can help companies' linkage and network performed inside of cluster to have active and international structure has to be considered in cluster policy.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.26 no.3
• /
• pp.667-678
• /
• 2016

Due to a development of the cable/wireless network infra, the traffic as big as unable to compare with the past is being served through the internet, the traffic is increasing every year following the change of the network paradigm such as the object internet, especially the traffic of about 1.6 zettabyte is expected to be distributed through the network in 2018. As the network traffic increases, the performance of the security infra is developing together to deal with the bulk terabyte traffic in the security equipment, and is generating hundreds of thousands of security events every day such as hacking attempt and the malignant code. Efficiently analyzing and responding to an event on the attack attempt detected by various kinds of security equipment of company is one of very important assignments for providing a stable internet service. This study attempts to overcome the limit of study such as the detection of Tor network traffic using the existing low-latency by classifying the anonymous network by means of the suggested algorithm about the event detected in the security infra.

• Journal of Navigation and Port Research
• /
• v.34 no.3
• /
• pp.221-228
• /
• 2010

As container traffic is increasing, the introduction of mega-vessel has had a significant impact on the ports and terminals business. This movement of container shipping has led to intensely competitive environment among ports, so substantial pressures to develop new container ports or to expand existing ones, have been grown. However, it requires a huge investment, especially cost and time, to overcome environmental, geographical and financial restrictions generated from developing a port. This study addressed the Mobile Harbor, the new concept of marine logistics system as an alternative strategy. We performed an economic analysis on the introduction of the Mobile Harbor in coastal transport sector and also a sensitivity analysis to examine the effects of changing factors related on the economic evaluation. We have examined the value and application of Mobile Harbor as a preliminary study, which may contribute to further studies on the Mobile Harbor.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2008.06a
• /
• pp.349-349
• /
• 2008

유비쿼터스 시대를 맞이하여 현재의 전자제품은 고주파 환경에서의 소형화된 마이크로파 소자를 요구하고 있다. 현재 구현되고 있는 마이크로파 소자의 형태는 여러 가지 전송선로 중에 하나로서 금속의 그라운드면 위에 유전체 막을 형성하고 그 위에 금속선을 정밀하게 패터닝하여 각 종 소자를 연결하는 microstrip line의 형태가 많이 사용된다. 이러한 microstrip line 형태의 소자를 설계할 시에 소자 자체의 구조나 유전체 막이 그 소자의 성능을 크게 좌우한다. 여기서 유전체 막은 신호선과 그라운드면 간의 전자파를 집중시켜주어 방사손실을 줄여주는 역할을 한다. 유전체 막의 두께는 소자의 전체적인 크기를 결정하는 요인이 된다. 이는 유전체 막의 두께가 감소할 경우 50 $\Omega$ 임피던스 매칭을 위해 막 위에 형성되는 소자들의 선폭도 동시에 줄여야 하므로 소자의 소형화도 가능 하여진다. 하지만 유전체 막의 두께가 감소할 경우 전자파가 유전체 막에 집중되지 못하여 방사손실이 커지게 되고 소자의 성능이 저하된다. 이런 점을 고려할 때 소자의 소형화를 만족시키면서 동시에 소자의 성능을 유지할 수 있는 유전체 막의 최적화 두께에 대한 연구가 필요하다. 볼 연구에서는 유전체 막의 최적화 두께를 제시하기 위해 대표적 마이크로파 소자인 Edge-Coupled Filter에 대하여 3-D Electromagnetic Simulator로 설계하고 유전체 막의 두께와 Filter 성능 간의 관계를 연구하였다. Filter의 성능은 유지하도록 하면서 유전체 막의 두께를 감소시켜 나간 결과, 약 30 ~ 40 ${\mu}m$ 의 최적화 두께를 얻을 수 있었다. 한편 30 ~ 40 ${\mu}m$ 두께의 후막 공정을 고려할 때 기존의 성막공정으로는 성막시간, 공정의 난이도, 공정온도 등의 면에서 난점이 존재하며 이러한 점들을 극복할 수 있는 Aerosol Deposition Method의 적용 가능성에 대해서 연구하였다.

• KDI Journal of Economic Policy
• /
• v.26 no.1
• /
• pp.71-104
• /
• 2004

This paper explores the empirical performances of the workout companies with special interests in the effectiveness of corporate reorganizing tools on their revitalization. In the empirical analysis it considers the criteria of success or failure in restructuring from both creditors' and debtors' perspectives. The key results are summarized as follows. First, the initial conditions on the debt structure of the workout companies are significantly related to the revitalization from both creditors' and debtors' point of view. Second, the debt restructuring instruments are insignificant in the success of corporate turnarounds while the debt-to-equity conversion has been a relatively effective tool. Third, the self-restructuring efforts, employment downsizing and governance reshuffling do not affect the performances significantly. The higher importance of initial conditions than corporate restructuring efforts may imply that Korean corporate workouts serve better to the needs of creditor financial institutions which are to maximize debt recovery and of the government which is to overcome financial crisis.

• Spatial Information Research
• /
• v.20 no.5
• /
• pp.1-13
• /
• 2012

This study intends to evaluate the seasonal flow direction of carbon dioxide in Northeast Asia by using GOSAT, the first Greenhouse Observing SATellite, in an attempt to overcome costly, laborious and time consuming ground observation which has been frequently pointed out in existing studies. For this purpose, missing values were supplemented by applying the Kriging interpolation and the overall flow direction of carbon dioxide was determined through anisotoropy semi-variogram. As a result, it was found that the overall spatial distribution of carbon dioxide in Northeast Asia varies depending on the latitude, and that carbon dioxide mainly flows southeast or east in spring, autumn and winter, but northeast or north in summer. Similar to the flow of monsoons in Northeast Asia, these results show that carbon dioxide flows mainly from the west to the east, which proves that carbon dioxide discharged from China is influencing even the Korean Peninsula and Japan. However, as the flow of carbon dioxide varies depending on a variety of factors such as artificial sources, plant respiration, and the absorption and discharge of the ocean, follow-up studies are requested to evaluate such variables and the correlations.

• Journal of the Korea Society of Computer and Information
• /
• v.15 no.7
• /
• pp.41-47
• /
• 2010

The emergency between vehicles on the superhighway should be transmitted quickly to the following vehicles for safety of people. The message between them has been transmitted by broadcast method in an wireless environment of 802.11, so far. That causes the broadcast storm and a waste of the bandwidth of Wireless network owing to unnecessary process of sending messages to even vehicles that do not have to receive the information. The message collision is a main cause of the increase of message delay. In order to overcome the existing problem, this paper proposed a message broadcast scheme based on cell (MBC), which is the way to divide cars into different groups by cell unit and transmit messages to the members of the groups through the cell primary (cp) vehicles. This paper shows the proposed broadcast's performance in the same environment is much superior to other conventional broadcast schems for inter-vehicle communication, since the receiving ratio among the following vehicles is improved.

• Journal of Digital Convergence
• /
• v.13 no.1
• /
• pp.227-235
• /
• 2015

Big data analysis is a means of organizational problem solving. For an effective problem solving, approaches to problem solving should take into account the factors such as characteristics of problem, types and availability of data, data analytic capability, and technical capability. In this article we propose three approaches: logical top-down, data driven bottom-up, and prototyping for overcoming undefined problem circumstances. In particular we look into the relationship of creative problem solving with the bottom-up approach. Based on the organizational data governance and data analytic capability, we also derive strategic issues concerning the sourcing of big data analysis.