• Journal of Advanced Navigation Technology
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• v.21 no.3
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• pp.306-311
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• 2017

In the future ubiquitous network, information will collect data from various sensors in the field. Since the sensor nodes are equipped with small, often irreplaceable, batteries with limited power capacity, it is essential that the network be energy-efficient in order to maximize its lifetime. In this paper, we propose an effective network routing method that can operate with low power as well as the transmission of data and information obtained from sensor networks, and identified the number of sensors with the best connectivity to help with the proper placement of the sensor. These purposes of this research are the development of the sensor middle-ware to integrate the maritime information and the proposal of the routing algorithm for gathering the maritime information of various sensors. In addition, for more secure ship navigation, we proposed a method to construct a sensor network using various electronic equipments that are difficult to access in a ship, and then construct a communication system using NMEA(the national marine electronics association), a ship communication standard, in the future.

• Proceedings of the Korean Society of Organic Agriculture Conference
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• 2009.12a
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• pp.313-313
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• 2009

지속 가능한 농업과 안전한 농산물의 생산을 유지시키면서 환경부담 물질 투입량을 절감시킬 수 있는 농법을 개발하기 위해서 유기농자재 사용실태 및 효과를 조사했다. 전북 익산시 웅포면 유기농업 시범마을 현지 농가에서 사용 중인 유기 농자재의 실태를 조사하고 또한 유기농자재의 성분을 분석하였다. 유기농 자재 시용효과를 검증하기 위해서 시범마을 현지 농가포장에서 삼광벼 품종으로 포트 육묘 후 기계이앙을 실시하고 유기농자재를 시용하여 조사하였다. 유기농업 종합기술 시범마을에서 활용중인 유기농자재는 27.5%가 유기농 목록에 공시된 자재를 사용하고 있었다. 시범마을에서 활용중인 유기농자재의 성분 중 수분은 평균 50.1%, 유기물함량은 36.0%, 총 질소함량은 1.71% 이며 염분은 0.56% 이였다. 경종방법과 유기농자재를 이용하여 새로운 유기농 벼 재배 기술을 개발할 목적으로 시험포를 조성한 지역에서 토양의 화학성분을 조사한 결과 pH, 마그네슘, 규산은 망성 단지에서 낮은 경향을 보였고, 유기물, 인산, 규산, 칼륨은 삼기단지에서 높았다. 포트육묘 후 이앙을 실시한 결과 단위면적당 이앙주수별 생육에서 재식밀도가 높을 수록 초장과 경수가 적었다. 산파육묘와 포트육묘 이앙 모두 도복 발생은 없었으며, 포트 육묘 3절의 두께가 양호하였다. 쌀겨 시용에서 잡초발 생량이 적었으며, 포트육묘 이앙에서 병해충이 적었다. 수량은 산파육묘에 비해 포트육묘 방식에서 5~10% 높았는데, 포트 육묘에서 주당 수수, 수당 립수가 많았고, 천립중이 무거웠다.

• Journal of Korean Society for Geospatial Information Science
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• v.22 no.3
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• pp.79-85
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• 2014

For the successful operation of unmanned ground vehicles(UGVs), optimal path planning should be considered with trafficability analysis, threat analysis, and so on. From among these, trafficability analysis is immensely important for safeness of UGVs especially in the case of driving the off-road such as unpaved road, grassland, and open fields. Geographical information has a pivotal role in extracting data and measuring cost for specified regions of interest. In this paper, we review possibilities to apply Land Cover Map(LCM) as a new, fundamental source and propose a new generation method of trafficability analysis map for optimal path planning of UGV. The simulation results show that the proposed method significantly improve the previous method by applying LCM either alone or in combination with the other GIS.

• Journal of the Korean Society of Marine Environment & Safety
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• v.18 no.1
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• pp.49-54
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• 2012

The purpose of this study is to define emergency response procedures by BDMS [Building Disaster Management System] when earthquake occurs on long-span bridge structures. The study is about developing a computer-based algorithm for various earthquake intensities that works with the System. Presently, long-span bridge disaster prevention relies on closed-system centered on human intervention alone. However, this study combines IT technology and internet-based open system creating a more practical system. Additionally, assigned duties and tasks are clearly defined to all personnel involved in various disaster situations using the Active Action Diagram(AAD) techniques. Also, the design of 3-dimensional view assists to determine the appropriate initial response in times of earthquake and other disasters. The combination of the existing manual emergency response procedures and the scenario-based (IT) response system being developed will create an efficiency and fast response actions in times of emergencies.

• Journal of Digital Convergence
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• v.13 no.3
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• pp.201-208
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• 2015

Recently computer, smart phone, medical devices, etc has become used in a variety of environments as the application fields of IT products have become diversification. Attack case of abuse of software security vulnerabilities is on the increase as the application fields of software have become diversification. Accordingly, secure coding program is of a varied but history management, updating, API module to be vulnerable to attack. Thus, this paper proposed a materialization of CMS linked system to enable check the vulnerability of the source code to content unit for secure software development, configuration management system that interwork on the transmission module. Implemented an efficient coding system secure way that departmentalized by the function of the program and by analyzing and applying secure coding standards.

• Fire Science and Engineering
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• v.33 no.5
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• pp.78-85
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• 2019

In complex buildings, Way-finding is the most important factor for safe evacuation. Recently, evacuation guidance systems using smartphones have been developed. However, smartphone evacuation guidance maps used in these studies appear different from those used in previous studies due to the lack of established standards. Therefore, in this study, we conducted a preference survey of evacuation guidance maps as a basic research for establishing evacuation guidance maps using smartphones. The components of smartphone evacuation guidance maps were selected using regulations and analyses conducted in previous studies, and preference surveys were conducted using the size of each component. Through this research, we suggested a method to create a high preference for each component of an evacuation guidance map.

• Korean Journal of Plant Resources
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• v.30 no.1
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• pp.1-7
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• 2017

In this study, we produced the recombinant lunasin peptide using E. coli and P. pastoris, and evaluated biological activity of the recombinant lunasin peptide. Lunasin peptide was produced from E. coli transfected with pPGEX-lunasin expression vector and P. pastoris GS115 transfected with pPIC-lunasin expression vector. These recombinant lunasin peptides were similar to the synthetic lunasin peptide in the identification by LC-ESI-MS. In addition, the recombinant lunasin peptide from E. coli and P. pastoris was bound in the chromatin, and inhibited histone acetylation and the activity of histone acetyltransferase. These findings suggest that the production of the lunasin peptide using E. coli and P. pastoris will be useful for industrial utilization of lunasin peptide.

• The Journal of Society for e-Business Studies
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• v.16 no.4
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• pp.1-16
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• 2011

A digital certificate mandated by the Electronic Signature Act has become familiar in our daily lives as 95% of the economically active population hold certificates. Due to upgrades to 256 bit level security that have become effective recently, the security and reliability of digital certificates are expected to increase. Digital certificates based on Public Key Infrastructure (PKI) have been known as "no big problem," but the possibility of password exposure in cases of leaked digital certificates still exists. To minimize this vulnerability, various existing studies have introduced alternative password methods, expansion of certificate storage media, and multiple certification methods. These methods perform enhanced functions but also have limitations including the fact that the secureness of passwords is not guaranteed. This study suggests an alternative method for enhancing the level of password secureness as a way to improve password security. This new method improves security management and enhances the convenience of using digital technologies. The results may be used for developing digital certificate related security technologies and research in the future.

• Journal of the Korea Convergence Society
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• v.9 no.2
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• pp.303-311
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• 2018

Squat exercise is one of the free weight exercises that are recognized as important from a bio-mechanical point of view. It is an important exercise to train lower extremity muscles in daily activities or sports activities and to strengthen trunk and lower body strength. It is effective and accurate to use a variety of assistive devices to calibrate athletic posture with squat exercise supported interactive device. The issues of the structural analysis for design a foot plate for squat exercise is to model the behavior by simplifying the dynamic behavior. In this paper, the authors proposed a exercise system design method for the vertical load distribution and bio-mechanical signal process used for the squat exercise mechanism analysis, and based on these results, designed device can make the more safe and reliable free weight exercise. It is applied to system design through design method with kinematic dynamic, VR device and estimation model of exercise.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.3
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• pp.519-530
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• 2015

With the development of technologies, smartphone provides excellent extensibility and performance. Users can install application programs easily in smartphone, so they can use smartphone in various way. In the past, users used smartphone for enhancing security in personal computer. Nowadays, smartphone has become a major target for attackers. Therefore we needs a reliable portable device for smartphone security. There are various wearable devices such as smartglasses and smartwatches, so they can be used for enhancing security in smartphone. In this paper, we study about that smartwatches can be role for enhancing smartphone security, and we implement transaction information verification scheme, Transaction information verification scheme based on CAPTCHA and CAPTCHA based transaction OTP scheme and experiment with users in prototype application.