• Journal of Digital Convergence
• /
• v.14 no.10
• /
• pp.45-51
• /
• 2016

The purpose of this paper is to plan deployment strategy of public key infrastructure for Malawi by considering the information and communication technology status on it. For this, we will review the information communication technology status on developing and least developed countries focused on Malawi and plan deployment strategy of mobile based public key infrastructure. First of all, we extract out security considerations for public key infrastructure, which is efficient for wireless communication, and design a new lightweight public key infrastructure apt to mobile device by considering Malawi's information communication technology status. Especially, the proposed mobile based public key infrastructure uses smartcards for all the processes of certificate. It could guarantee the same security as the wired counter part based on lightweight mobile device.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.20 no.1
• /
• pp.103-109
• /
• 2016

The information security industry is technology-intensive, high value-added industries. South Korea's response has excellent ICT skills and experience and skills in a variety of cyber attacks, has become a benchmark in the world. However, the small size of the domestic information security company, supporting infrastructure is lacking. Domestic information security industry is the primary condition to activate the export. For the export of high value-added enterprise information security products and services, it is necessary the establishment of the domestic IT information security infrastructure of the industrial promotion is based overseas. Come to analyze the domestic information security industry, capital of this small, market reclamation of overseas expansion, information, manpower shortage was a problem. This fact, combined losses caused by cost-free period AS. Therefore, the study on information security in the infrastructure industry overseas bases is necessary. How to select and analyze the causes of infrastructure in selected overseas offices. By utilizing the infrastructure of overseas bases, can raise the added value of the products and services of the Information Security company, we can enable the export of small and medium Information Security company from overseas offices.

• 한국IT서비스학회:학술대회논문집
• /
• 2008.11a
• /
• pp.119-122
• /
• 2008

해외(미국) 케이블방송 시장에서 제공되는 서비스와 주요기술 현황을 점검하고 향 후 서비스 환경 및 기술 변화에 대한 케이블방송 산업의 대응 전략을 알아보고자 한다. 또한, 본 연구에서는 향후 국내 케이블방송 산업 발전에 있어 고려 할 만한 시사점을 제안한다.

• Journal of the Korea Institute of Construction Safety
• /
• v.1 no.1
• /
• pp.16-21
• /
• 2018

The purpose of this study was to utilize 90 construction site accidents accumulated from 15 years ago by the Office of the High Level Investigation Committee of the Korea Infrastructure Safety Corporation under consignment from the Ministry of Land, Infrastructure and Transport. The construction site accident population used in this study is difficult to represent the entire construction site accident, but is considered to have statistical value as analysis data for a given size of construction site accident. The analysis is believed to be available on site as a basic data for securing construction safety and is expected to be used as a data for establishing future direction of construction safety policy.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.31 no.9A
• /
• pp.892-899
• /
• 2006

In this paper, we propose an automatic switching technology between the ad-hoc and the infrastructure modes without user intervention in the IEEE 802.11b wireless LAN. Also, we design our proposed technology and implemented on the Linux machine. For this operation, the area within an Access Point (AP) coverage is defined as a switching area, and a node without any transmission in this area is assumed to be able to relay frames between the AP and nodes in the shaded area that is outside the coverage and cannot reach the AP. By using the proposed technology, it is possible to provide the seamless Internet access service to nodes at the ad-hoc mode in the shaded area. In this paper, we explains the operation of the detection method of the switching area, presents the flowchart and implementation environment. To prove the operation of our technology, we obtain the results of captured packets transmitted between nodes and throughput results through ftp transmission experiment. Hence, we can see that our proposed scheme can be improve the wireless access service in wireless and mobile networks.

• The Journal of Society for e-Business Studies
• /
• v.4 no.2
• /
• pp.23-40
• /
• 1999

Nowadays, major application of public key certification technology based on PKI(Public Key Infrastructure) is electronic commerce. Public key certification technology may include various sub-technologies such as key recovery, secret sharing, certificate/key management, and directory system technology. This thesis discusses PKI-based certification authority technology for electronic commerce on the Internet.

• Asia pacific journal of information systems
• /
• v.3 no.1
• /
• pp.3-30
• /
• 1993

This paper provides a model for aligning business and information technology strategies. The model, expanded from the earlier study by Henderson and Venkatraman, is composed of four elements: business strategy, business infrastructure, information technology strategy, and information technology infrastructure, and suggests different ways of aligning business and information technology strategies. Basically, there are three types of aligning: integrating, domain based aligning, business reengineering. The validity of the model is supported by case studies.

• Journal of the Korea Institute of Construction Safety
• /
• v.2 no.2
• /
• pp.70-75
• /
• 2019

The purpose of this study is to conduct survey on the DfS system for employees who perform construction-related tasks, analyze the results, and present improvement directions. The results of the survey showed that the system was gradually being settled, with about 82% and 93% positive results on the recognition and necessity of the system. In addition, the three highest response rates for the improvement of the system were first, improving the expertise of DfS-related performance personnel, second, improving the awareness of DfS-related actors, and third, reflecting the appropriate costs associated with DfS. For the realization of the above improvements, it was proposed to prepare a curriculum for improving the professionalism of the staff, to implement an incentive system for improvement of perception, and to prepare appropriate payment criteria for preparing reports available during the construction phase. In addition, the Korea Infrastructure Safety and Technology Corporation will need to perform its active role in order to become a system for preemptive management of risk factors for construction accidents from the design stage.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2003.03a
• /
• pp.241-248
• /
• 2003

In August 2002, side wall of OO tunnel, at the Bonghwa, Kungbuk province, Korea, was collapsed by abruptly applied heavy soil and water pressure to side wall from a inclined shaft when there was a heavy rain. These days, Inclined shaft is used for the purpose of reducing construction time, using ventilation system, using the out of carrying equipment and mucking when we construct tunnel in the world. Recently constructed tunnel has the source of inclined shafts, but the more time elapse, we lose the source of the inclined shaft such as exact position, condition, and the fact that whether inclined shaft is exist or not. Therefore, this study inspected the interior's appearance, analyzed structure to evaluate the reason of collapsing side wall and this study also performed the repairing work. Finally, we show improving maintenance method to prevent that similar accident that might be happened.

• Advances in concrete construction
• /
• v.9 no.1
• /
• pp.93-102
• /
• 2020

In this study, we examined the relationship among the rheological properties, workability, and extrudability in the construction of concrete structures using additive manufacturing. We altered the component materials (binder type, water-binder (W/B) ratio, sand ratio) to assess their effect on the rheological properties experimentally. The results indicated that the W/B and sand ratios had the largest effect on the rheological properties. In particular, when the sand ratio increased, it indicated that adjusting the sand ratio would facilitate control over the rheological properties. Additionally, we compared the rheological properties with the results of a traditional workability evaluation, namely the table flow test. This indicated the possibility of inferring the rheological properties by using traditional methods. Finally, we evaluated extrusion quantity according to table flow. The extrusion rate was 350 g/s for a flow of 210 mm and 170 g/s for a flow of 130 mm, indicating that extrusion rate increased as flow increased; however, we concluded that a flow standard of approximately 140-160 mm is suitable for controlling the actual extrusion quantity and rate.