• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.1
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• pp.317-326
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• 2024

Biometric recognition is a technology that determines whether a person is identified by extracting information on a person's biometric and behavioral characteristics with a specific device. Cyber threats such as forgery, duplication, and hacking of biometric characteristics are increasing in the field of biometrics. In response, the security system is strengthened and complex, and it is becoming difficult for individuals to use. To this end, multiple biometric models are being studied. Existing studies have suggested feature fusion methods, but comparisons between feature fusion methods are insufficient. Therefore, in this paper, we compared and evaluated the fusion method of multiple biometric models using fingerprint, face, and iris images. VGG-16, ResNet-50, EfficientNet-B1, EfficientNet-B4, EfficientNet-B7, and Inception-v3 were used for feature extraction, and the fusion methods of 'Sensor-Level', 'Feature-Level', 'Score-Level', and 'Rank-Level' were compared and evaluated for feature fusion. As a result of the comparative evaluation, the EfficientNet-B7 model showed 98.51% accuracy and high stability in the 'Feature-Level' fusion method. However, because the EfficietnNet-B7 model is large in size, model lightweight studies are needed for biocharacteristic fusion.

• Convergence Security Journal
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• v.6 no.4
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• pp.101-112
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• 2006

It will not be able to guarantee the secure operation for the information and communication systems with only technical security. So, ISMS(Information Security Management System) research and standardization are active going on. Korea published "The national cyber security management regulation" and "The national cyber security manual" in 2005. According to the regulation and manual, the government organ and public institution must accomplish the security management assessment to itself for systematic management of an information security. We studied related standards and security management systems of the Australia and the USA, and analyzed the security management evaluation system in "The national cyber security manual" in efficient security management focus. We presented the improvement direction of national security evaluation system through the research. We propose the additional control, selective control set and improvement of the evaluation process for efficient security management. Proposed system possible composition of suitable to each organ and flexible adaptation of rapidly changed information environment.

• Journal of Convergence for Information Technology
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• v.11 no.3
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• pp.236-249
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• 2021

Due to the spread of AR/VR headset, AR/VR contents market gains huge interests. However, various obstacles such as discomfort that restricts usability and absence of standard to evaluate usability block the growth of AR/VR contents industry. To overcome these problems, this study tries to develop an evaluation scheme for the usability of R/VR contents and a prototype system. The proposed evaluation system divides usability related items into safety and convenience items and performs evaluation by item through automatic and experience evaluation by system and experts/experience teams according to characteristics, and comprehensively evaluates the usability of AR/VR content. In this study, a detailed process fo usability evaluation and the prototype system are developed to verify the evaluation scheme. Developed scheme is expected to help the AR/VR content industry overcome the usability issues, and develop high-quality AR/VR content.

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.209-218
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• 2018

The purpose of this study is to analyze the influence of information system factors and organizational factors on procedural management performance in small and medium-sized venture companies in the Seoul metropolitan area. In the previous study was conducted mainly on large companies and general SMEs. In this study, the research was conducted considering the characteristics of SMEs. The results showed that system suitability, system quality, and IT assets had a positive effect on procedural management performance, and manager perception and human resource capacity had a positive effect on procedural management performance. But the evaluation and compensation did not have a positive effect on procedural management performance. The results of this study showed almost the same results as those of the previous studies. Venture firms have poor financial ability, technology, and organizational management ability than general SMEs. However, the introduction and diffusion factors of new information systems were not significantly different from those of general SMEs.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.314-314
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• 2022

기후변화로 인해 집중호우 등 설계강우량을 초과하는 강우가 빈번하게 발생하고 있으며, 이에 따라 농촌유역의 홍수 및 침수의 발생빈도 및 강도가 증가하고 있다. 국내 농업용 저수지 약 17,500여개 중 약 70%는 70년 이상 경과된 노후시설로 분류되고 있으며, 특히 농어촌공사에서 관리하는 3,411개의 저수지를 제외한 시군관리 저수지는 체계적인 유지보수가 이루어지지 않고 있다. 이로 인해 홍수기 농업용 저수지의 월류 및 붕괴에 따른 하류지역 침수 피해가 빈번하게 일어나고 있다. 농촌유역 침수 피해 저감을 위한 대책을 수립하기 위해서는 먼저 정확한 침수 피해 평가가 수행되어야 하지만, 우리나라에는 현재 농촌유역에 특화된 침수 피해 평가 체계가 부족한 실정이다. 본 연구에서는 농촌유역의 맞춤형 침수 피해 평가 체계를 개발하고자 한다. 농촌유역의 농업용 저수지를 포함한 농업수리구조물의 붕괴 등에 따른 하류 침수 모의 기법을 개발하고, 농작물의 종류를 고려한 침수심 및 침수시간에 따른 침수피해 모의 체계를 개발하고자 한다. 본 연구에서 개발한 농촌유역 맞춤형 침수 피해 평가 체계는 향후 농촌유역의 체계적인 재난관리를 위한 정책 수립에 활용될 수 있을 것으로 기대된다.

• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2003.06a
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• pp.137-140
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• 2003

본 연구는 치매노인환자의 생활의 질을 향상시키기 위한 대화시스템의 개발에 목표를 둔다. 제안된 시스템은 주로 세 가지 모듈, 즉, 음성인식, 시간테이블에 의해 구분된 대화 데이터베이스의 자동검색, 그리고 간호사의 녹음음성에 의한 응답 등으로 구성되어 있다. 우선 치매환자가 요양시설에서 자주 발화하는 대화의 내용을 조사하고, 그들의 발화 음성을 인식하고 적절히 응답하도록 구성하였다. 시스템의 평가를 위해서 시스템이 도입되었을 때와 도입되지 않았을 때를 비교, 조사하였다. 시스템이 도입되지 않았을 때는 간호사가 자유로이 케어서비스를 행할 수 있도록 하였다. 비디오 촬영을 통해서 대상자의 행동 및 반응을 조사한 결과, 치매환자의 요구를 충족시키는데 있어서 대화 시스템이 간호사들보다 더 응답적이었다는 것을 알 수 있었다. 게다가, 제안된 시스템은 상호 대화에 있어서 환자가 더 많이 말하도록 유도함을 알 수 있었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.750-753
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• 2010

본 연구에서는 침입차단시스템 제품의 성능 현황을 분석하고 품질평가 기준 및 보안성 품질평가 방법을 개발하고자 한다. 이를 위해 침입차단시스템(FW) 제품 유형을 대상으로 특성 및 핵심 기술 요소를 분석하고 침입타단시스템 제품의 구조 및 응용 기술을 분석한다. 그리고 현황 조사 및 분석을 바탕으로 침입차단시스템 제품의 품질평가 기준과 평가방법론을 개발하였다.

• The Journal of the Convergence on Culture Technology
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• v.5 no.1
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• pp.451-456
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• 2019

Our students are shocked by the results that there is an inverse proportion between academic achievement and life satisfaction. Recently, the Organization for Economic Cooperation and Development (OECD) published the PISA 2015 Student Well-Being Report. According to the report, Korean students' education is the highest among OECD countries, but their life satisfaction is the 47th ranked among the 48 OECD and non-OECD countries.[1] This is the cause of the unilateral education using collective achievement in evaluation methods. Therefore, I propose a personalized integrated model utilizing block chain technology. I suggest a personalized education and evaluation system model using selective education and personal approval rather than from teachers' unilateral education. This will no longer open the student's achievement grade system to the public. This change will be accomplished utilizing block chain technology. This technology is characterized by security, transparency and dispersion. The result of this work can be used to improve students' quality of living through a management system of personalized education and evaluation, based on the nature of education.

• Korean Journal of Remote Sensing
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• v.22 no.4
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• pp.295-304
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• 2006

Image fusion is defined as making new image by merging two or more images using special algorithms. In case of remote sensing, it means fusing multispectral low-resolution remotely sensed image with panchromatic high-resolution image. Generally, hyperspectral image fusion is accomplished by utilizing fusion technique of multispectral imagery or spectral unmixing model. But, the former may distort spectral information and the latter needs endmember data or additional data, and has a problem with not preserving spatial information well. This study proposes a new algorithm based on two stage spectral unmixing model for preserving hyperspectral image's spectral information. The proposed fusion technique is implemented and tested using Hyperion and ALI images. it is shown to work well on maintaining more spatial/spectral information than the PCA/GS fusion algorithms.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.28 no.3
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• pp.175-182
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• 2022

Heavy metals can be intentionally or unintentionally introduced into plastic food utensils, containers, and packaging (PFUCP) as additives or contaminants, which can be ingested with food by humans. Here, seven-heavy metals (lead, cadmium, nickel, chromium, antimony, copper, and manganese) with toxicity concerns were selected, and risk assessment was done by establishing their migration from 137 PFUCP products made of 16 materials distributed in Korea. Migration of heavy metals was examined by applying 4% acetic acid as a food simulant (70℃, 30 minutes) to the PFUCP products. Inductively coupled plasma mass spectrometry (ICP-MS) was employed for the analysis of migrated heavy metals, and the reliability of quantitative results was confirmed by checking linearity, LOD, LOQ, recovery, precision, and expanded uncertainty. As a result of monitoring, heavy metals were detected at a level of non-detection to 8.76 ± 11.87 ㎍/L and most of the heavy metals investigated were only detected at trace amounts of less than 1 ㎍/L on average. However, antimony migrated from PET products was significantly higher than other groups. Risk assessment revealed that all the heavy metals investigated were safe with a margin of exposure above 311. Collectively, we demonstrated that heavy metals migrated from PFUCP products distributed in Korea appear to be within the safe range.