• 융합보안논문지
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• 제23권5호
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• pp.45-55
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• 2023

IT 기술의 발전으로 따른 디지털 기기 사용의 보편화와 함께, 익명 통신 기술의 규모 또한 기하급수적으로 증가하고 있다. 이러한 상황에서 특히, 다크 웹(Dark web)과 딥웹(Deep web) 등 익명성을 보장하는 보안 메신저가 디지털 범죄의 온상지가 되고 있다. 익명 네트워크를 이용한 범죄 행위는 사용 기기에 로컬 데이터를 거의 남기지 않아 행위 추적이 어렵다. 미국 연방형사소송규칙과 영국 수사권한법에서는 온라인 수색 관련 법 및 제도 도입을 통해 대응하고 있으나, 한국은 관련 법의 부재로 인하여 수사적 대응 또한 전무한 실정이다. 종래의 (해외에서 사용되는) 온라인 수색 기법은 프로세스가 종료되면 아티팩트(Artifact) 수집을 할 수 없고, 메모리에만 데이터를 저장하는 악성코드에 대응할 수 없으며, 민감 데이터 식별이 어렵고, 무결성이 침해된다는 기술적 한계가 확인된다. 본 논문에서는 기본권 침해를 최소화하는 방향에서 물리 메모리 데이터 분석을 통한 익명 네트워크 사용자 행위 추적 기반 블록체인 범죄 수사방식의 국내 도입 방안을 제안한다. 클로링을 통해 수집한 다크 웹 사이트 사용자의 행위를 추적해 물리 메모리의 잔존율과 77.2%의 합의 성공률을 확인함으로써 제안 방안의 수사로서의 실효성을 입증하고자 하였다.

• Journal of Ecology and Environment
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• 제48권2호
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• pp.163-172
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• 2024

Background: Fruit bats are natural carriers of Nipah virus (NiV). The primary objective of this study is to identify potential reservoir species in a selected geographic regions. It is necessary to determine an accurate species identification of the associated reservoir bat species distributed in a specific region. Results: In this study, we collected 20 different bat specimens from the NiV-prone area of the Kushtia district. Among these, 14 were tissue samples (BT-1-14) and six were fecal samples (BF-1-6). We used the mitochondrial gene cytochrome b, one of the most abundant and frequently used genetic markers, for polymerase chain reaction amplification and sequencing. Out of the 20 samples, 12 tissue samples and 2 fecal samples were successfully amplified and sequenced. However, two tissue samples and four fecal samples yielded chimeric sequences, rendering them unsuitable for annotation. The sequences of the successfully amplified samples were compared to those deposited in the National Center for Biotechnology Information database using basic local alignment search tool to identify the bat specimen collected. The study identified six different bat species using both morphological and genetic data, which may carriers of the NiV. Conclusions: Our results suggest that additional research should be conducted to gather more information on fruit bats from different localities across the country. The study contributes to the establishment of appropriate measures for NiV carrying disease control and management.

• 경영정보학연구
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• 제16권3호
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• pp.161-177
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• 2014

기업신용등급은 금융시장의 신뢰를 구축하고 거래를 활성화하는데 있어 매우 중요한 요소로서, 오래 전부터 학계에서는 보다 정확한 기업신용등급 예측을 가능케 하는 다양한 모형들을 연구해 왔다. 구체적으로 다중판별분석(Multiple Discriminant Analysis, MDA)이나 다항 로지스틱 회귀분석(multinomial logistic regression analysis, MLOGIT)과 같은 통계기법을 비롯해, 인공신경망(Artificial Neural Networks, ANN), 사례기반추론(Case-based Reasoning, CBR), 그리고 다분류 문제해결을 위해 확장된 다분류 Support Vector Machines(Multiclass SVM)에 이르기까지 다양한 기법들이 학자들에 의해 적용되었는데, 최근의 연구결과들에 따르면 이 중에서도 다분류 SVM이 가장 우수한 예측성과를 보이고 있는 것으로 보고되고 있다. 본 연구에서는 이러한 다분류 SVM의 성능을 한 단계 더 개선하기 위한 대안으로 유전자 알고리즘(GA, Genetic Algorithm)을 활용한 최적화 모형을 제안한다. 구체적으로 본 연구의 제안모형은 유전자 알고리즘을 활용해 다분류 SVM에 적용되어야 할 최적의 커널 함수 파라미터값들과 최적의 입력변수 집합(feature subset)을 탐색하도록 설계되었다. 실제 데이터셋을 활용해 제안모형을 적용해 본 결과, MDA나 MLOGIT, CBR, ANN과 같은 기존 인공지능/데이터마이닝 기법들은 물론 지금까지 가장 우수한 예측성과를 보이는 것으로 알려져 있던 전통적인 다분류 SVM 보다도 제안모형이 더 우수한 예측성과를 보임을 확인할 수 있었다.

• 지역연구
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• 제9권1호
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• pp.65-78
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• 1993

In this study, the significant and enduring concentration of federal R&D spending in metro-scale clusters across the nation is treated as evidence of the operation of a distinct industrial infrastructure defined by the ability of R&D performers to attract external funding and pursue the sophisticated project work demanded. It follows, then, that the agglomerative potential of these R&D concentrations -- performers and their support infrastructures -- requires a search for economic impacts guided by a different stimulative effects attributable to federal R&D spending may be that substantial subnational economic impacts are routinely obscured and diluted by research designs that seek to discover impacts either at the level of nation-scale economic aggregates or on firms or specific industries organized spatially. Therefore, this study proceeds by seeking to link the locational clustering of federal contract R&D spending to more localized economic impacts. It tests a series of models(X-IV) designed to trace federal contract R&D spending flows to economic impacts registered at the level of metro-regional economies. By shifting the focus from funding sources to recipient types and then to sector-specific impacts, the patterns of consistent results become increasingly compelling. In general, these results indicated that federal R&D spending does indeed nurture the development of an important nation-spanning advanced industrial production and R&D infrastructure anchored primarily by two dozed or so metro-regions. However, dominated as it is by a strong defense-industrial orientation, federal contract R&D spending would appear to constitute a relatively inefficient national economic development policy, at least as registered on conventional indicators. Federal contract R&D destined for the support of nondefense/civilian(Model I), nonprofit(Model II), and educational/research(Mode III) R&D agendas is associated with substantially greater regional employment and income impacts than is R&D funding disbursed by the Department of Defense. While federal R&D support from DOD(Model I) and for-profit(Model II) and industrial performer(Model III) contract R&D agendas are associated with positive regional economic impacts, they are substantially smaller than those associated with performers operating outside the defense industrial base. Moreover, evidence that the large-business sector mediates a small business sector(Model VI) justifies closer scrutiny of the relative contribution to economic growth and development made by these two sectors, as well as of the primacy typically accorded employment change as a conventional economic performance indicator. Ultimately, those regions receiving federal R&D spending have experienced measurable employment and income gains as a result. However, whether or not those gains could be improved by changing the composition -- and therefore the primary missions -- of federal R&D spending cannot be decided by merely citing evidence of its economic impacts of the kind reported here. Rather, that decision turns on a prior public choice relating to the trade-offs deemed acceptable between conventional employment and income gains, the strength of a nation's industrial base not reflected in such indicators, and the reigning conception of what constitutes national security -- military might or a competitive civilian economy.

• 식물분류학회지
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• 제44권3호
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• pp.165-170
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• 2014

상록성 참나무류는 한반도 상록활엽수림을 구성하는 주요 수종으로 알려져 있다. 그러나 가시나무(Quercus myrsinifolia Blume)의 한반도 분포지와 자생현황은 명확히 밝혀져 있지 않다. 본 연구에서는 문헌조사와 표본에 근거한 현지조사를 토대로 가시나무의 자생지를 밝혀 한반도 내 분포를 명확히 하고자 하였다. 또한 보존대책의 첫 단계로 자생 개체수 전수 조사를 실시 하였다. 조사결과, 한반도 내에서 가시나무는 전남 진도에 단 3개의 아집단으로 구성된 169개의 성체만이 제한적으로 자라는 것으로 확인되었다. 본 연구를 통해 오동정과 식물표본의 채집지 오기재가 종의 분포에 대한 혼란을 야기하는 주된 원인임을 알 수 있었다. 금번 조사결과는 한국산 가시나무의 효과적 보전을 위한 중요한 지표자료로 활용할 수 있을 것이다. 또한 식물표본의 정확한 데이터 기재의 필요성을 확인할 수 있다. 한편 본 논문에서는 한반도에서 이 종의 분포가 진도에만 제한되게 된 원인에 대해 논의 하였다.

• 한국실내디자인학회논문집
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• 제22권6호
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• pp.11-19
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• 2013

The number of visitors to historic sites and museums in Korea has been on a rapid decrease and in order to search for creative ways to work on the problem, the study proposed a theme park-typed museum with cultural heritage applied and reviewed spatial strategies for such theme park-typed museums. Applied methods of research of this study are as follows. First, in order to understand definitions and current situations of cultural heritage use and theme park-typed museums, the study went thoroughly over all sorts of literature and reports as well as findings of advance researches on how to make a use of cultural heritage. Based on the results of the investigations, the study determined characteristics of the theme park-typed museums with cultural heritage applied which the study was proposing and the characteristics were categorized by type. Considering those characteristics and types gained in the study, the study looked for cultural heritage-based theme parks and museums in the world which were good enough to be used as research subjects in the study from the aspects of profitability and level of awareness. The study examined those theme parks and museums in the world and in the end, it found out ways to adopt the findings to the situations in Korea and discussed expecting effects as well. As to the characteristics of the theme park-typed museums with cultural heritage applied, the study divided those characteristics into mutual cooperation, location, communicability, authenticity, maintainability, education, durability, narrativity, undailiness, interactivity and leisure. The types were categorized into ride, environment direction, cartoon character and souvenir by attraction pattern. When cultural heritage is used actively, it would improve competitiveness of historic cultural sites and museums in return, making people realize the iterative structure of excavation, conservation, maintenance and use of cultural heritage. That would create many kinds of added values, re-discovering culture of the country. At the same time, it would also create a new value of culture as well. Now, it is important for us to do harder with researches on how to evolve museums and exhibition spaces. Considering that, the study is believed to make a contribution to revival of historic sites and museums in Korea but also establishment of scientific strategies.

• Asian Pacific Journal of Cancer Prevention
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• 제14권4호
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• pp.2159-2165
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• 2013

Cancer registries help to establish and maintain cancer incidence reporting system, serve as a resource for investigation of cancer and its causes, and provide information for planning and evaluation of preventive and control programs. However, their wider role in directly enhancing oncology drug access has not been fully explored. We examined the value of cancer registries in oncology drug access in the Asia-Pacific region on three levels: (1) specific registry variable types; (2) macroscopic strategies on the national level; and (3) a regional cancer registry network. Using literature search and proceedings from an expert forum, this paper covers recent cancer registry developments in eight economies in the Asia-Pacific region - Australia, China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, and Thailand - and the ways they can contribute to oncology drug access. Specific registry variables relating to demographics, tumor characteristics, initial treatment plans, prognostic markers, risk factors, and mortality help to anticipate drug needs, identify high-priority research area and design access programs. On a national level, linking registry data with clinical, drug safety, financial, or drug utilization databases allows analyses of associations between utilization and outcomes. Concurrent efforts should also be channeled into developing and implementing data integrity and stewardship policies, and providing clear avenues to make data available. Less mature registry systems can employ modeling techniques and ad-hoc surveys while increasing coverage. Beyond local settings, a cancer registry network for the Asia-Pacific region would offer cross-learning and research opportunities that can exert leverage through the experiences and capabilities of a highly diverse region.

• Asian-Australasian Journal of Animal Sciences
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• 제31권5호
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• pp.738-747
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• 2018

Objective: In a previous study, analysis of Illumina sequenced metagenomic DNA data of bacteria in Vietnamese goats' rumen showed a high diversity of putative lignocellulolytic genes. In this study, taxonomy speculation of microbial community and lignocellulolytic bacteria population in the rumen was conducted to elucidate a role of bacterial structure for effective degradation of plant materials. Methods: The metagenomic data had been subjected into Basic Local Alignment Search Tool (BLASTX) algorithm and the National Center for Biotechnology Information non-redundant sequence database. Here the BLASTX hits were further processed by the Metagenome Analyzer program to statistically analyze the abundance of taxa. Results: Microbial community in the rumen is defined by dominance of Bacteroidetes compared to Firmicutes. The ratio of Firmicutes versus Bacteroidetes was 0.36:1. An abundance of Synergistetes was uniquely identified in the goat microbiome may be formed by host genotype. With regard to bacterial lignocellulose degraders, the ratio of lignocellulolytic genes affiliated with Firmicutes compared to the genes linked to Bacteroidetes was 0.11:1, in which the genes encoding putative hemicellulases, carbohydrate esterases, polysaccharide lyases originated from Bacteroidetes were 14 to 20 times higher than from Firmicutes. Firmicutes seem to possess more cellulose hydrolysis capacity showing a Firmicutes/Bacteroidetes ratio of 0.35:1. Analysis of lignocellulolytic potential degraders shows that four species belonged to Bacteroidetes phylum, while two species belonged to Firmicutes phylum harbouring at least 12 different catalytic domains for all lignocellulose pretreatment, cellulose, as well as hemicellulose saccharification. Conclusion: Based on these findings, we speculate that increasing the members of Bacteroidetes to keep a low ratio of Firmicutes versus Bacteroidetes in goat rumen has resulted most likely in an increased lignocellulose digestion.

• 한국측량학회지
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• 제33권2호
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• pp.111-122
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• 2015

본 연구에서는 모바일 레이저 스캐닝 데이터로부터 철도 선로탐지 및 선로모델 추출을 위한 방법을 제시하였다. 제안된 방법은 크게 세 단계로 구성된다. 첫째, 레이저 포인트로부터 잠재적인 철도 선로지역을 탐지하고, 초기 철도 선로궤적 방향을 추정한다. 둘째, 철도 선로에 관한 선 지식을 이용하여 첫번째 스트립에서 초기 선로위치를 결정한다. 여기서, 스트립은 국부 탐색공간을 나타내며 철도 선로궤적에 수직인 방향으로 정의된다. 마지막으로, 초기 선로위치에서 GMM-EM기반 분류방법을 통해 선로 포인트들을 탐지한 후 초기 선로 모델을 생성하고 스트립을 데이터 처리 기본단위로 하여 tracking by detection관점에서 연속적으로 선로모델을 생성하였다. 제안된 방법의 주요 특징은 다음과 같다. 첫째, 이전 스트립에서 생성된 선로 모델을 가이드 라인으로 다음 스트립에 전파되어 국부 탐색영역을 예측하여 선로 포인트를 탐지하는 하는데 있어서 처리 복잡성을 줄일 수 있었다. 둘째, 선로 포인트 탐지와 선로 모델링을 동시에 진행 함으로써 데이터 처리 시간을 최소화 할 수 있었다. 개발된 알고리즘은 C++ 프로그램 언어로 구현되었고 도시지역에서 MMS 측량을 통해 취득된 LiDAR 데이터(경부선 일부 구간)를 이용하여 성능 테스트를 진행하였다.

• 한국균학회지
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• 제45권3호
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• pp.234-240
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• 2017

충남 서천군 한산면 신성리 금강하구 갈대밭 토양의 야생효모 분포특성을 알아보기 위하여 갈대밭 토양 20점을 채취하여 야생효모들을 분리하여 총 11종 20균주의 야생효모를 동정하였다. Candida속의 효모가 10균주로 가장 많이 분리되었고, 그 중 Candida subhashii 균이 6균주로 가장 많았다. 분리된 균주 중에서 Candida tropicalis (Y5-1,Y5-2, Y6-1), Candida subhashii (J7-1, J7-3, J8-1, Y9-1, Y9-2, Y9-3), Lachancea thermotolerans (MJS 007, MJS 019) 균주 등 12균주들이 알코올 발효능을 보였다. Bullera japonica YJ10-1, C. subhashii J7-1, Kluyveromyces yarrowii YJ11-1, Ustilago shanxiensis Y10-1등 4균주들이 국내 미기록 효모 균주들로 최종 선별되었다. 이들 국내 미기록 균주들은 구형으로 Candida subhashii J7-1만이 자낭포자와 의균사를 형성하였다. Kluyveromyces yarrowii YJ11-1은 비타민을 함유하지 않은 배지에서도 생육하였고 Candida subhashii J7-1는 YM과 YPD 배지 및 5% NaCl을 함유한 YPD 배지에서 생장하지 않았다.