• 농업과학연구
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• 제47권4호
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• pp.727-742
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• 2020

Point cloud-based 3D maps can obtain many kinds of information for maintenance work on forest road networks. This study was conducted to compare the importance of each factor to select the factors required for the mapping of 3D forest road maps. This can be used as basic data for attribute information required to maintain forest road networks. The results of this study found that out of a total of 30 indexes extracted for mapping 3D forest roads, a total of 21 indexes related to stakeholder groups were significantly different. The importance of the index required by the civil service group was significantly higher than that of the other groups overall. In the case of the academic group, the index importance for cut slope, fill slope, and drainage facility was significantly higher. On the other hand, the index importance for the forestry cooperative and forest professional engineer group was mostly distributed between the civil servants' group and the academic group. In particular, the type of drainage system showed the highest value among the detailed indexes. Overall, drainage related factors in this survey had high coefficient values. The impact of water on forest roads was the most important part in road maintenance. In addition, the soil texture had a high value in relation to slope stability. This is thought to be because the texture of the soil affects the stability of the slope.

• 한국컴퓨터정보학회논문지
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• 제28권2호
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• pp.55-62
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• 2023

우주에서 지상 기지국까지 무선 데이터 전송을 성공하기 위해서는 전파가 불안정한 대기권을 통과해야만 한다. 국제 우주 데이터 시스템 자문 위원회(CCSDS)가 요구하는 Data link 알고리즘은 암호화와 수신측 오류를 감지하고 재동기가 가능해야한다. 그러나 오류 복원은 CCSDS 요구조건에 포함되지 않는다. 본 논문에서는 다양한 잡음에 내성과 오류 복원이 가능한 알고리즘을 제안한다. 잡음 제거 필터와 선명도를 향상시키는 필터 그리고 EDSR 등을 통해 가우시안, Salt, Pepper, S&P 잡음 등 다양한 환경을 고려하여 실험하였으며, 그 결과 잡음 억제와 보정에 도움이 된 것을 확인하였다. 추가적으로 유사 알고리즘인 SES Alarmed와 DSES Alarmed와 비교한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권2호
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• pp.591-608
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• 2023

With the emergence of advanced encryption technologies such as Quantum Cryptography and Full Disk Encryption, an era of strengthening information security has begun. Users respond positively to the advancement of privacy-enhancing technology, on the other hand, investigative agencies have difficulty unveiling the actual truth as they fail to decrypt devices. In particular, unlike past ciphers, encryption methods using biometric information such as fingerprints, iris, and faces have become common and have faced technical limitations in collecting digital evidence. Accordingly, normative solutions have emerged as a major issue. The United States enacted the CLOUD Act with the legal mechanism of 'Contempt of court' and in 2016, the United Kingdom substantiated the Compelled Decryption through the Investigatory Powers Act (IPA). However, it is difficult to enforce Compelled Decryption on individuals in Korea because Korean is highly sensitive to personal information. Therefore, in this paper, we sought a method of introducing a Compelled Decryption that does not contradict the people's legal sentiment through a perception survey of 95 people on the Compelled Decryption. We tried to compare and review the Budapest Convention with major overseas laws such as the United States and the United Kingdom, and to suggest a direction of legislation acceptable to the people in ways to minimize infringement of privacy. We hope that this study will be an effective legal response plan for law enforcement agencies that can normatively overcome the technical limitations of decoding.

• 한국IT서비스학회지
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• 제22권3호
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• pp.29-47
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• 2023

With the recent advancement of information and communication technologies such as artificial intelligence, big data, cloud computing, and 5G, data is being produced and digitized in unprecedented amounts. As a result, data has emerged as a critical resource for the future economy, and overseas countries have been revising laws for data protection and utilization. In Korea, the 'Data 3 Act' was revised in 2020 to introduce institutional measures that classify personal information, pseudonymized information, and anonymous information for research, statistics, and preservation of public records. Among them, it is expected to increase the added value of data by combining pseudonymized personal information, and to this end, "the Expert Data Combination Agency" and "the Expert Data Agency" (hereinafter referred to as the Expert Data Processing Agency) system were introduced. In comparison to these domestic systems, we would like to analyze similar overseas systems, and it was recently confirmed that the Vermont government in the United States enacted the first "Data Broker Act" in the United States as a measure to protect personal information held by data brokers. In this study, we aim to compare and analyze the roles and functions of the "Expert Data Processing Agency" and "Data Broker," and to identify differences in designated standards, security measures, etc., in order to present ways to contribute to the activation of the data economy and enhance information protection.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권6호
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• pp.1600-1619
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• 2023

Organizations and other institutions have recently started using cloud service providers to store and share information in light of the Internet of Things (IoT). The major issues with this storage are preventing unauthorized access and data theft from outside parties. The Block chain based Security Sharing scheme with Data Access Control (BSSDAC) was implemented to improve access control and secure data transaction operations. The goal of this research is to strengthen Data Access Control (DAC) and security in IoT applications. To improve the security of personal data, cypher text-Policy Attribute-Based Encryption (CP-ABE) can be developed. The Aquila Optimization Algorithm (AOA) generates keys in the CP-ABE. DAC based on a block chain can be created to maintain the owner's security. The block chain based CP-ABE was developed to maintain secures data storage to sharing. With block chain technology, the data owner is enhancing data security and access management. Finally, a block chain-based solution can be used to secure data and restrict who has access to it. Performance of the suggested method is evaluated after it has been implemented in MATLAB. To compare the proposed method with current practices, Rivest-Shamir-Adleman (RSA) and Elliptic Curve Cryptography (ECC) are both used.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.328-330
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• 2022

현재 다양한 분야에서 메타버스를 도입하고, 콘텐츠 또는 아이템 등의 거래에 NFT를 사용하는 가상융합경제가 등장하여 '메타버스 환경'으로 발전할 것으로 전망하고 있다. '메타버스 환경'은 앞으로 우리사회의 변화를 주도할 것이며 AI, 빅데이터, 클라우드, IoT, 블록체인, 차세대 네트워크 기술과 융합될 것이다. 하지만 메타버스 이용자가 서비스 이용을 위해 제공하는 개인정보, 기기정보, 행위정보는 주요 공격대상 된다. 따라서 사용자의 안전한 이용 환경 제공과 관련 기업의 비즈니스 기반 확대를 위하여 민·관 협력체계 구축 및 보안 가이드 개발이 선두과제이다. 따라서 본 연구에서는 메타버스 특징과 기술을 비교분석하며 이에 발생할 수 있는 보안 위협과 대응방안을 살펴본다.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.616-623
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• 2013

One of the oldest, most common engineering problems is measuring the dimensions of different objects and the distances between locations. In AEC/FM, related uses vary from large-scale applications such as measuring distances between cities to small-scale applications such as measuring the depth of a crack or the width of a welded joint. Within the last few years, advances in applying new technologies have prompted the development of new measuring devices such as ultrasound and laser-based measurers. Because of wide varieties in type, associated costs, and levels of accuracy, the selection of an optimal measuring technology is challenging for construction engineers and facility managers. To tackle this issue, we present an overview of various measuring technologies adopted by experts in the area of AEC/FM. As the next step, to evaluate the performance of these technologies, we select one indoor and one outdoor case and measure several dimensions using six categories of technologies: tapes, total stations, laser measurers, ultrasound devices, laser scanners, and image-based technologies. Then we evaluate the results according to various metrics such as accuracy, ease of use, operation time, associated costs, compare these results, and recommend optimal technologies for specific applications. The results also revealed that in most applications, computer vision-based technologies outperform traditional devices in terms of ease of use, associated costs, and accuracy.

• 한국식품과학회지
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• 제51권4호
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• pp.369-378
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• 2019

본 연구는 원심분리형, 외기어 방식 그리고 쌍기어 방식과 같은 착즙 방법에 따른 당근 주스의 품질 특성을 비교하기 위해 수행되었다. 신선한 주스의 품질은 착즙률, 영양성분 및 층 분리 안정성을 통해 평가되었다. 쌍기어 착즙 방식은 가장 높은 착즙률을 보였다. 게다가 당근 주스의 미네랄 함량은 쌍기어 착즙방식으로 제조된 당근 주스에서 가장 높게 나타났으며, 특히 유일하게 쌍기어 방식의 착즙이 100 g의 당근으로부터 1일 권장 섭취량 이상의 ${\beta}$-carotene이 얻어졌다. 더욱이 당근 주스의 입자 크기가 가장 작게 나타난 것은 쌍기어 방식의 착즙이었고 다음으로 외기어 방식과 원심분리형으로 나타났다. 따라서 쌍기어 방식의 착즙을 최적의 방법으로 선정하고, 이를 이용해 당근 주스의 항산화 활성 및 대사 활성 변화를 조사하였다. 그 결과 당근 주스는 ${\alpha}$-tocopherol 보다 더 높은 지질과산화 저해율을 보였으며, 위장과 소장 소화를 거치면서 angiotensin I-converting enzyme(ACE) 저해 활성이 증가되었다.

• 대한원격탐사학회지
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• 제39권6_1호
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• pp.1185-1193
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• 2023

위성 영상을 활용하여 정확한 토양 수분도를 산정하는 연구는 원격탐사 응용 분야에 포함되는 중요한 기본 연구 주제 중 하나이다. 이 연구의 목적은 KOMPSAT-3/3A 영상과 KOMPSAT-5 SAR 영상을 적용하여 시험 지역에 대하여 토양수분도를 제작하고 산정된 결과를 정확도 검증 차원에서 미국 NASA에서 제공하는 Soil Moisture Active Passive (SMAP)의 토양수분 자료와 정량 비교하는 것이다. 한편 농림 식생 지대를 중심으로 토양수분도를 산정하기 위하여 환경공간정보서비스에서 제공하는 토지피복지도를 연구에 적용하였다. 시험 연구 지역은 이 연구에 적용한 수분 구름 모델(Water Cloud Model)에 기반한 토양수분 산정 알고리즘 적용에 필요한 입력 자료가 모두 가용한 제주 서부 지역을 선정하였다. 토양수분도 제작에 사용한 Synthetic Aperture Radar (SAR) 영상은 KOMPSAT-5 HV와 Sentinel-1 VV 영상이며, 식생지수는 KOMPSAT-3 영상의 지표반사도를 사용하였다. 이 연구에서 산출한 토양수분도 산정 결과와 SMAP (L-3) 자료를 차분 연산으로 비교하면 차이 값이 평균 4.13±3.60p%의 높은 일치도를 보이는 것으로 나타났고, SMAP (L-4) 자료와의 차분 연산 결과는 평균 14.24±2.10p% 수준의 일치도를 보였다. 이 연구를 통하여 향후 우리나라 위성영상과 공공 제공자료를 이용하여 정확도가 높은 정밀 토양수분도를 제작할 수 있는 가능성을 제시하였다.

• 천문학회보
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• 제40권1호
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• pp.61.2-61.2
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• 2015

15P/Finlay is one of the Jupiter-Family Comets that has long been known since the late 19 century. The comet maintains the perihelion around 1.0 AU over a century, without showing any prominent activities (i.e. fragmentation or eruption) since the discovery. According to reports in unpublished observations, the comet exhibited an outburst in the middle of 2014 December. We conducted a imaging observation of 15P/Finlay just after the report, from 2014 December 23 to 2015 February 18 using three telescopes (the Okayama Astrophysical Observatory 50-cm telescope, the Ishigakijima Astronomical Observatory 105-cm telescope, and the Nishi-Harima Astronomical Observatory 2-m telescope), which constitute a portion of the OISTER (an inter-university observation network in the optical and infrared wavelengths). As a result of the frequent observations, we witnesses the second outburst around UT 2015 January 16. Such cometary outbursts draw the attention to researchers on ground that they could offer insight into the internal structure of comets, following a historical outburst occurred at 17P/Holmes on 2007 October 23. Although cometary outbursts have been often reported mostly in unpublished observations or unreviewed reports, it should be emphasized that there are not a sufficient number of astrophysical research which characterizes the physical properties by observing the aftermaths. This presentation provides a new observational result of 15P/Finlay outburst. Based on the morphological development of the dust cloud as well as the near-nuclear magnitude, we will derive the kinetic energy of the outburst. Finally we plan to compare the results of 15P/Finlay with those of analogical events at 17P/Holmes and P/2010 V1 (Ikeya-Murakami).