• Korean Journal of Construction Engineering and Management
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• v.16 no.6
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• pp.73-83
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• 2015

Construction management firms in Korea have mainly focused on the key management areas of time, cost, quality and safety management in line with a rapid change of construction industry recently. However, a risk management is considered comparatively less important found from our research on an investment by the firms for training, system establishment. This has been identified that the construction management firms have taken an approach of dealing with risks with their experience, insight rather than managing risks with a systemized principles or proper tools. Therefore, the current system for risk management was identified by analyzing risk factors and work process in this research and systemized process for risk management of the identified risk factors was suggested. This research is expected to be a basis on establishing standard gudiance for risk management and risk management tools.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.501-503
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• 2017

In the water sector, various data such as flow rate, pressure, water quality and water level are collected during the whole process of water purification plant and piping system. The collected data is stored in each water treatment plant's DB, and the collected data are combined in the regional DB and finally stored in the database server of the head office of the Korea Water Resources Corporation. Various abnormal data can be generated when a measuring instrument measures data or data is communicated over various processes, and it can be classified into missing data and wrong data. The cause of each abnormal data is different. Therefore, there is a difference in the method of detecting the wrong side and the missing side data, but the method of cleansing the data is the same. In this study, a program that can automatically refine missing or wrong data by applying deep learning LSTM (Long Short Term Memory) algorithm will be studied.

• The KIPS Transactions:PartC
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• v.8C no.6
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• pp.721-730
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• 2001

Nowadays corporation networks are growing rapidly and they are needed to communicate with branch offices. Therefore, a VPN (Virtual Private Network) appears to reduce the cost of access and facilitate to manage and operate the enterprise network. Along with this trend, many studies have been done on VPN. It is important that the performance issues should be considered when VPN protocols are applied. However, most of them are limited on the tunneling methods and implementation of VPN and a few studies are performed on how installation of VPN affects the network. Therefore, in this paper, a testbed is constructed and VPN protocols are installed on it. Real traffic is generated and transmitted on the testbed to test how installing a VPN affects the network. As a result, layer 3 VPN protocol shows lower network performance than layer 2 VPN protocols. And we realize that the combination of L2TP and IPSec is the better method to install VPN than using IPSec only in the aspects of performance and security.

• Journal of Internet Computing and Services
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• v.5 no.6
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• pp.45-58
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• 2004

This paper consists of two parts, One is the ECC( GF(2/sup m/)) algorithm to improve the security strength and the processing time of SSL VPN and the other is the WLCAPT algorithm instead of LSNAT for the security strength of virtual server. In general when corporates use SSL protocol in order to build VPN, they use RSA algorithm with the problem of security and processing time about authentication and confidentiality, In this paper, a shared public key is generated with ECSPK which uses ECC( GF(2/sup m/)) algorithm to improve the security and processing time instead of RSA In addition, WLCAPT algorithm proposed in this paper is applied to virtual server which resides in the server side and then after NAT translation, the actual server of headquarter is securely communicated with it.

• Land and Housing Review
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• v.12 no.4
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• pp.15-30
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• 2021

Korean urban development cooperation is gradually expanding into Latin America and the Caribbean (LAC) region, but strategies to encourage domestic market players to participate are insufficient. This paper investigated the Colombian urban planning system, urban development projects, and Korean projects in Colombia, which leads to implications for international cooperation in LAC. This research, first, compares the national and regional urban planning systems of Colombian major cities, Bogotá and Medellín. Second, case studies are carried out with a land readjustment project, a Macro project for large-scale public rental housing supply, and urban development cooperation between Korea and Colombia. By doing so, the role and the directions for Korean urban development cooperation with LAC such as Colombia are discussed and proposed. The findings suggest, first, aid projects through Official Development Assistance (ODA) should establish urban networks in recipient countries. Second, it is necessary to understand the financing structure for urban development cooperation projects that are different from infrastructure projects. Third, the successful case of urban development cooperation should be demonstrated by making the development period and size optimal and manageable.

• International Area Studies Review
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• v.13 no.3
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• pp.163-190
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• 2009

This study tries to analyze the investment determinants of Chinese firms in local Korea, where the Chinese investing ones have been operating since in the middle of 1990s. The main purpose can be mentioned to test empirically some relations between the investment determinants of Chinese firms and the investment types. In detail speaking, the dependent variables of investment types are classified with sole venture and joint venture, while the independent ones are sorted based on the previous studies with the 2 following factors like the competitive advantages of Chinese firms, and the location advantages of local Korea. This study is conducted as the following: the survey of Chinese firms engaging in investment activities in there is implemented by collecting questionnaires. And for testing the hypothesis, the path analysis of structural equation modeling is activated with SPSS. 12.0 and AMOS 11.0 for windows.

• International Area Studies Review
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• v.14 no.3
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• pp.267-289
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• 2010

The purpose of this paper is to compare the different characteristics of Korean and Japanese Overseas Direct Investment(ODI) in Asia. An empirical test consists of two parts, the determinants of ODI and the micro characteristics of subsidiaries in Asia between Korea and Japan. Multiple regression and logistic regression model are used in empirical tests as methodology. The coefficient of GDP is significant and positive sign to sole venture in both countries. The coefficient of CPA in Korea is significant and positive sign to joint venture but insignificant in Japan. The coefficient of WAGE in Korea is significant and positive sign to joint venture but is significant and negative sign to joint venture in Japan. The coefficient of LBIT is significant and positive sign to joint venture in Japan. The coefficient of HOME is significant and positive sign to sole venture in both countries.

• International Area Studies Review
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• v.16 no.3
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• pp.209-237
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• 2012

Multinational enterprises(MNEs) try to strengthen their global innovative capabilities by incorporating the foreign subsidiaries' knowledge bases. Foreign subsidiaries play an important role in MNEs' knowledge creation activities. This study develops a strategy model that strengthening the knowledge creation capabilities of Korean firms' foreign subsidiaries. Four strengthening strategy types are derived from three research areas related with center of excellence, subsidiary strategic roles, and knowledge creation capabilities. The strategies that strengthen knowledge creation capabilities are including organizational culture and autonomy reinforcing strategy, subsidiary's absorptive capacity reinforcing strategy, local environment management strategy, and network building strategy. Strategic fit conditions which support the success of each strategy type are also discussed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.111-117
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• 2019

In this paper, we propose a mobile remicon quality management system to enable inspection and correspondence with a smart phone in the field check of remicon. We also proposed a real-time slump data processing part to digitize field inspection and XML formats for data exchange with the server. We used the smart phone to transmit real-time image about field inspection of remicon and judged the error at the same time. By doing this, we shared the situation of the remicon products in the field and the head office. Based on the actual results, the development technology is used to determine whether the product is abnormal or not, and to provide appropriate information to the company and the site. Based on the analysis of raw material quality data, it is possible to present real time optimal blending ratio according to raw material import with raw material management data, which is the biggest problem of the ready mixed concrete industry.

• International Area Studies Review
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• v.15 no.2
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• pp.275-301
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• 2011

This study examines antecedent factors that influence subsidiaries' MNC (multinational corporation) knowledge adoption. I argue that subsidiary local environmental factors(local embeddedness, level of local competition), subsidiary organizational factors(parent investment, subsidiary CEO expatriation, scope of subsidiary value chain), and subsidiary relational factors(subsidiary autonomy, the strength of subsidiary in MNC, social capital) are the important enablers for subsidiaries to adopt knowledge from other MNC units. Especially, I use two data set (knowledge from (1) peer subsidiaries, (2) parent company) to estimate the effect of the factors. The results indicate that subsidiary local embeddedness and scope of subsidiary value chain negatively influence on subsidiary knowledge adoption from peer subsidiaries. Conversely, the strength of subsidiary in MNC and social capital positively influence on that. Subsidiary knowledge adoption from parent company is positively influenced by parent investment and social capital.