• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.89-91
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• 2004

In SCADA systems, an RTU is a device installed at a remote location that collects data, codes the data into a format that is transmittable and transmits the data back to a central station, or MTU. An RTU also collects information from the master device and implements processes that are directed by master device. RTUs are equipped with input channels for sensing or metering, output channels for control, indication or alarms and a communications port. In general, the data are transmitted via a wired communication infrastructure such as RS422 or RS485 between RTU and MTU. But, limited range of wired communication doesn't allow the system to cover remote areas over the limitation, and building a wired communication network is not easy in the circumstances. In this Paper, we design and implement a smart cost-effective Web-RTU that can communicate with MTU via Web. Web is of benefit to the Web-RTU, because it is not only free from the distance limitations, but also is built easily and cost-effectively wherever Internet resources are available. Additionally, Web can be easily applied to the SCADA system with the development of hardware and software for communications. The Web-RTU has a program memory, a data memory and a RAM inside, and uses Atmega128, low-cost 8 bit micro-processor with eight AI(Analog Input). It performs well enough to implement all existing roles of RTU.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.13 no.2
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• pp.1-8
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• 2017

Outdoor design temperature is important for selecting proper capacity of heating and cooling systems of a building to implement indoor thermal comfort and save energy consumption. The purpose of this study is to investigate the change of South Korea outdoor design temperature according to the assigned period. When outdoor design temperature of 8 locations calculated with the latest weather data during 2008~2015 years using ASHRAE Bin method are compared to the standard temperature of Ministry of Land, Infrastructure and Transport which is widely used for designing South Korea air-conditioning system at present, the maximum temperature difference becomes $0.97^{\circ}C$ for cooling, and $1.94^{\circ}C$ for heating. Due to wide outdoor temperature variation, update of outdoor design temperature based on recent weather data is recommended.

• Journal of Information Technology Services
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• v.10 no.4
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• pp.191-204
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• 2011

Recently, many software companies are trying to improve the software quality and project outcome with more costs and efforts in development time. In the software convergence and integration environments, it is required efforts to gain high quality of software. In other words, it is required to utilize software engineering knowledge and technology for higher software quality and better software project productivity. The Software development productivity can be varied by software process capability according to building a framework for software development, selection and use of appropriate technology, human resource management. Software process capability will influence software project outcome which is the general opinion. This study provides empirical evidence about software engineering efforts and investment approach to lead software project performance. We measured the software engineering efforts by SW engineering level and analyzed the corelation between software engineering level and schedule deviation. And, we verified that this performance is affected by the size of software company. As a result, software process capability is important to build a infrastructure and develop systematically software project. The higher software engineering level can lead to improved software project performance.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.6
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• pp.1038-1044
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• 2001

Recently the trends of telecommunications market is able to be explained by the shift of center from wire to and the rapid increase of data service. Not only all the world is tied one by emerging Internet and its fast spread, but also the degree of building If is the most important measure to evaluate national competence. In this point of view, next generation Internet is required for strengthening comparative advantage in industry and infrastructure in country. So in this paper, identifying the limitation of present Internet, and the concept of next generation Internet. Finally it is suggested in this paper that definition of optical Internet as next generation Internet of which technical situation and evolution direction, then provide to the implication for successful its establishment.

• The Journal of Information Technology
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• v.4 no.1
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• pp.39-54
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• 2001

Knowledge can be characterized in many ways. We have categorized internal and external knowledge by its position, tacit and explicit knowledge by the degree of formalization, and general and innovative knowledge by the power of competitive advantage. They is, often, mixed in real world. Under New Economy, firms must conduct the analysis of various knowledge embodied employee's skill, its products and business process, and create a new added value. Knowledge is the important strategic resource and the ability to capture, organize, store and apply is the critical capability for substantial competitive advantage. For establishing the steps of knowledge management strategy, we described below - the identification of intellectual capital, value analysis, the building of knowledge infrastructure, the knowledge organization, value creation, and the knowledge evaluation and dynamic knowledge management.

• Journal of Korean Library and Information Science Society
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• v.45 no.3
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• pp.395-414
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• 2014

This study considers that the establishment of a public library within multi-use complex is one of the most effective ways to expand infrastructure of public libraries in Korea. A survey on the complexation rates of public libraries in Seoul was made through on-the-spot visits and telephone interviews. It turned out that out of all 112 public libraries in Seoul, 55 of them are in multi complex buildings. In order to efficiently establish public libraries to multi-use complex, absolute consideration on the size, location, and space should be made. Moreover, if necessary, additional complexation with commercial facilities, schools, and local government buildings should be made.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.4
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• pp.853-871
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• 2012

The location based service is divided into GPS that uses the artificial satellite or base transceiver station in order to cover the wide area and RTLS(Real Time Location System) using the Zigbee, RFID, CSS(Chirp Spread Spectrum), UWB, Bluetooth and Wi-Fi equipment in the space(close range) limited like the building inside or park. Moreover it also repeats the technical development upon through the acceleration of the development of the wire and wireless infrastructure and determination technology, the development of the Internet, diversification of the contents, and etc. As a result, it is expected to develop around the determination technology, witch is common core technology element, contents technology, Internet and mobile communication technology, and etc. afterward. In this research, the direction we investigate was to find and analyze new technology and standardization trend of LBS in order to contribute to the related industry.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.67
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• pp.163-186
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• 2015

This study attempts to analyze the trade costs of domestic firms utilizing the FTAs in terms of burden of expenses in managing the rules of origin. In doing so, we classify the managing costs of FTA rules of origin into three categories (that is, (i) ex ante costs from acquiring necessary information and building the infrastructure in the advance stage before the FTAs, (ii) the actual costs of the origin management in the application stage of FTA preferential treatment, (iii) ex post management cost in the preparation stage of origin verification) and perform a survey on the greater details on each category. Using the comprehensive results from the survey regarding domestic firm's use of FTAs, this paper also discusses the issues related to small and medium-sized firms and addresses the concerns involved with their managing costs of FTA rules of origin. Importantly, this paper emphasizes the importance of government supports to reduce inefficiency induced by the additional costs that domestic firms face in their use of FTAs and proposes the various policy implications regarding the managing costs of rules of origin.

• Proceedings of the Korea Technology Innovation Society Conference
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• 1998.05a
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• pp.17-17
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• 1998

As the environment of the info-telecommunications policy is rapidly changing, the issue of promoting the informatization is emerging as a primary one of a government. In this sense, it is getting more recognized that, the informatization strategies centering on network-building should be interconnected with the issues of promoting the applications. Since the strategies to promote the informatization would necessarily result in the development, supply, and usage of the applications, needed are the consideration of policy directions to develop, supply, and use the applications effectively and of desirable policy means to carry them out. This study analyses the policies, which were related the issue of promoting the national informatization. And, this study also proposes the useful policy directions for an effective establishment of the applications in order to promote the national informatization.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.11
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• pp.1517-1522
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• 2018

This paper describes the improvement of the arithmetic for emergency generator capacity. This formula which calculates emergency generator is dependent on the Korean Design Standard of building electrical equipment issued by the Ministry of Land, Infrastructure and Transport, and the technical data related to the generator. when appling the formula, the capacity of the generator is insufficient at the starting conditions of the load facility. In case of emergency, the generator is not operated normally. $PG_2$ of the formula ($PG_1$, $PG_2$, $PG_3$) applied in determining the capacity of the emergency generator is selected by calculating the capacity of the generator based on only biggest one motor among the load equipment and $PG_3$ may not be able to start the generator normally in case of emergency because there is an error such that the power factor is applied at the last start of the motor having the maximum capacity of the load. We analyze the problem of capacity calculation of emergency generators used for general purposes. As a consequence, the improved formulas have been presented for safety of electrical installation.