• 영미문화
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• 제18권4호
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• pp.1-31
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• 2018

It is needless to say that America's indiscriminate artillery and chemical attacks have worsened the conditions of Vietnam's tropical rain forests, causing war-torn combat troops and civilians to suffer more from the participation and aftermath of the Vietnam war. Around two decades after the Vietnam War, American and Vietnamese writers dealing with the destruction of the human and nature of the Vietnam War and the following traumatic experience commonly report the horrors of inhumane warfare, but some differences among them appear in the reception of the ecocide consciousness. For American writers who had been involuntarily involved or who had stayed in the back area as interpreters and counter-intelligence force, the Vietnam War was often a kind of exotic "addicted adventure" which their American hometown could not provide. But apart from overcoming postwar post-traumatic stress by writing of healing which was shared with American war writers, Vietnamese writers have been able to overcome the scars of war as the communal memorial, which Jonathan Shay emphasized as the necessary comforting ritual by community members showing the sign of honor and care. On the other hand, American war writers were on the side of "separate peace," as Jeong stressed, and the Vietnam War to them was more racist like the case of "body count." Nevertheless, it is fortunate that the hideous experience of war could turn them all into the creativity pool, just as the 5,000 square mile of bomb creators have been used as the postwar fish ponds.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권8호
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• pp.4041-4059
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• 2019

Key establishment method based on channel reciprocity for time division duplex (TDD) system has earned a vital consideration in the majority of recent research. While most of the cellular systems rely on frequency division duplex (FDD) systems, especially the 5G network, which is not characterized by the channel reciprocity feature. This paper realizes the generation of a group secret key for multi-terminals communicated through a wireless network in FDD mode, by utilizing the nature of the physical layer for the wireless links between them. I consider a new group key generation approach, which using bitwise XOR with a modified pairwise secret key generation approach not based on the channel reciprocity feature. Precisely, this multi-node secret key agreement technique designed for three wireless network topologies: 1) the triangle topology, 2) the multi-terminal star topology, and 3) the multi-node chain topology. Three multi-node secret key agreement protocols suggest for these wireless communication topologies in FDD mode, respectively. I determine the upper bound for the generation rate of the secret key shared among multi-node, for the three multi-terminals topologies, and give numerical cases to expose the achievement of my offered technique.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권11호
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• pp.4011-4027
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• 2021

Cloud Computing has emerged as an extensively used technology not only in the IT sector but almost in all sectors. As the nature of the cloud is distributed and dynamic, the jeopardies present in the current implementations of virtualization, numerous security threats and attacks have been reported. Considering the potent architecture and the system complexity, it is indispensable to adopt fundamentals. This paper proposes a secure authentication and data sharing scheme for providing security to the cloud data. An efficient IPSO-KELM is proposed for detecting the malicious behaviour of the user. Initially, the proposed method starts with the authentication phase of the data sender. After authentication, the sender sends the data to the cloud, and the IPSO-KELM identifies if the received data from the sender is an attacked one or normal data i.e. the algorithm identifies if the data is received from a malicious sender or authenticated sender. If the data received from the sender is identified to be normal data, then the data is securely shared with the data receiver using SHA256-RSA algorithm. The upshot of the proposed method are scrutinized by identifying the dissimilarities with the other existing techniques to confirm that the proposed IPSO-KELM and SHA256-RSA works well for malicious user detection and secure data sharing in the cloud.

• International Journal of Computer Science & Network Security
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• 제24권7호
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• pp.123-127
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• 2024

Cloud computing services has gained increasing popularity in recent years for supporting various on demand and scalable services for IT consumers where there is a need of less investment towards infrastructure. While storage architecture of cloud enjoys a more robust and fault-tolerant cloud computing network, such architecture also poses a number of security challenges especially when applied in applications related to social networks, Financial transactions, etc. First, as data are stored and maintained by individual virtual machines so Cloud resources are prone to hijacked. Such attacks allow attackers to create, modify and delete machine images, and change administrative passwords and settings successfully. hence, it is significantly harder to ensure data security. Second, Due to dynamic and shared nature of the Cloud, data may be compromised in many ways. Last but not least, Service hijacking may lead to redirect client to an illegitimate website. User accounts and service instances could in turn make a new base for attackers. To address the above challenges, we propose in this paper a distributed data access control scheme that is able to fulfil fine-grained access control over cloud data and is resilient against strong attacks such as compromise and user colluding. The proposed framework exploits a novel cryptographic primitive called attribute-based encryption (ABE), tailors, and adapts it for cloud computing with respect to security requirements

• 헤리티지:역사와 과학
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• 제51권4호
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• pp.208-223
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• 2018

이 글에서는 유네스코 인류무형유산 공동등재제도가 다 국가 협력을 통해 현장에서 어떠한 전략과 쟁점을 통해 실현되는지에 주목하고, 이로써 공동등재제도의 특성과 의의를 도출하였다. 논의 대상으로 한국을 포함한 18개 국가가 2010년에 인류무형유산 대표목록으로 공동등재한 '매사냥' 사례를 분석하였다. 논의 결과를 정리하면 다음과 같다. 첫째, 매사냥의 인류무형유산 공동등재 참가국들은 등재신청서 작성을 통해 무형유산보호를 위한 등재제도의 취지를 보다 명확하게 이해하게 되었음을 확인하였다. 특히 매사냥의 등재가 결과적으로 무형유산 전체의 가시성 확보에 기여해야 한다는 점을 인식하게 되었고, 이를 등재신청서에 반영한 것이 2010년 공동등재와 2012년 등재확대에 결정적으로 작용하였다. 둘째, 공동등재 추진의 특성상 참가국들은 공유유산을 매개로 협력과 소통의 기회를 가짐으로써 상호간의 문화와 민족성에 대한 이해의 폭을 넓히게 되었다. 이것은 공동등재를 통해 국가의 협력과 평화에 기여하고자 하는 유네스코 이념의 실천이라는 중요한 의미를 지닌다. 셋째, 인류무형유산 매사냥은 <무형문화유산보호협약>의 이행지침에 의거하여 지속적으로 참여국가가 확대됨으로써 공동등재에 있어 모범적 사례로 기능할 수 있을 것으로 보인다. 공동등재의 확대는 특정 무형유산의 소유자를 규정하는 문제를 두고 발생하는 국제 간 긴장을 해결하는 실마리가 될 수 있으며, 협약의 취지에 대한 당사국의 이해가 높아지고 있음을 나타낸다는 면에서도 의의가 있기 때문이다.

• Animal Systematics, Evolution and Diversity
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• 제28권1호
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• pp.48-53
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• 2012

The tiger population that once inhabited the Korean peninsula was initially considered a unique subspecies (Panthera tigris coreensis), distinct from the Amur tiger of the Russian Far East (P. t. altaica). However, in the following decades, the population of P. t. coreensis was classified as P. t. altaica and hence forth the two populations have been considered the same subspecies. From an ecological point of view, the classification of the Korean tiger population as P. t. altaica is a plausible conclusion. Historically, there were no major dispersal barriers between the Korean peninsula and the habitat of Amur tigers in Far Eastern Russia and northeastern China that might prevent gene flow, especially for a large carnivore with long-distance dispersal abilities. However, there has yet to be a genetic study to confirm the subspecific status of the Korean tiger. Bone samples from four tigers originally caught in the Korean peninsula were collected from two museums in Japan and the United States. Eight mitochondrial gene fragments were sequenced and compared to previously published tiger subspecies' mtDNA sequences to assess the phylogenetic relationship of the Korean tiger. Three individuals shared an identical haplotype with the Amur tigers. One specimen grouped with Malayan tigers, perhaps due to misidentification or mislabeling of the sample. Our results support the conclusion that the Korean tiger should be classified as P. t. altaica, which has important implications for the conservation and reintroduction of Korean tigers.

• Molecules and Cells
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• 제26권6호
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• pp.566-575
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• 2008

Twenty-five chipmunk species occur in the world, of which only the Siberian chipmunk, Tamias sibiricus, inhabits Asia. To investigate mitochondrial cytochrome b sequence variations and population structure of the Siberian chipmunk in northeastern Asia, we examined mitochondrial cytochrome b sequences (1140 bp) from 3 countries. Analyses of 41 individuals from South Korea and 33 individuals from Russia and northeast China resulted in 37 haplotypes and 27 haplotypes, respectively. There were no shared haplotypes between South Korea and Russia - northeast China. Phylogenetic trees and network analysis showed 2 major maternal lineages for haplotypes, referred to as the S and R lineages. Haplotype grouping in each cluster was nearly coincident with its geographic affinity. In particular, 3 distinct groups were found that mostly clustered in the northern, central and southern parts of South Korea. Nucleotide diversity of the S lineage was twice that of lineage R. The divergence between S and R lineages was estimated to be 2.98-0.98 Myr. During the ice age, there may have been at least 2 refuges in South Korea and Russia - northeast China. The sequence variation between the S and R lineages was 11.3% (K2P), which is indicative of specific recognition in rodents. These results suggest that T. sibiricus from South Korea could be considered a separate species. However, additional information, such as details of distribution, nuclear genes data or morphology, is required to strengthen this hypothesis.

• 헤리티지:역사와 과학
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• 제53권3호
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• pp.184-201
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• 2020

해방 이후 북한과 남한의 고고학은 전혀 다른 길을 걸어오게 된다. 특히 1970년대 이후 급격히 정치성을 띠기 시작한 북한 고고학과 대규모 유적 발굴로 학문적 성장이 가속화된 남한 고고학은 큰 차이를 보이기 시작하며, 이러한 양상은 1990년대 대동강문화의 천명 이후 더 이상 공유되는 부분이 없을 정도의 괴리가 생겨나게 된다. 그리고 이러한 괴리는 '고조선'을 전후한 청동기시대와 철기시대에 더욱 두드러진다. 그럼에도 불구하고 남한의 선사 고고학은 지속적으로 북한 고고학에 시선을 둘 수밖에 없다. 아직도 중요한 연구 주제 중인 '문화의 기원과 계통'을 찾는데 있어 북한의 자료가 주된 연구 대상이지만 그 신뢰성에 의문을 표하는 '이중적인 시선'이 남한의 고고학이 북한 고고학을 바라보는 시선인 것이다. 북한 청동기시대 고고학과 남한 청동기시대 고고학에서 보이는 '괴리'의 많은 부분은 조사 사례의 증가, 학술적인 토론 등으로는 해결되지 않는 '정치적 차이'에 의한 것이다. 그럼에도 북한 선사 고고학의 흐름을 살펴보는 것은 북한 고고학의 정치성을 비판하기 위한 것은 아니다. 북한에서 현재 청동기시대를 바라보는 인식과 남한의 인식에 어떠한 차이가 있으며, 이후 북한의 자료를 포함하여 '한반도의 선사문화', 더 나아가 동북아시아의 선사문화를 설명하는데 어떠한 문제점이 있는지를 미리 확인해 두고자 하는 것이다. 본고에서는 지금까지 북한 청동기시대 고고학의 연구 흐름을 살펴보고 동시기 남한 청동기시대 고고학과 비교하여 어떠한 쟁점들이 있는지를 검토하였다.

• BMB Reports
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• 제40권5호
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• pp.791-800
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• 2007

Ethylene performs an important function in plant growth and development. 1-aminocyclopropane-1-carboxylate (ACC) synthase (ACS), the key enzyme involved in ethylene biosynthesis, has been the focus of most ethylene studies. Here, a cotton ACS gene referred to as Gossypium hirsutum ACS1 (GhACS1), was isolated. The full-length cDNA of GhACS1 encodes for a 476-amino acid protein which harbors seven conserved regions, 11 invariant amino acid residues, and the PLP binding active site, all of which characterize ACC synthases. Alignment analysis showed that GhACS1 shared a high degree of identity with other known ACC synthases from different species. Two introns were detected in the genomic DNA sequence, and the results of Southern blot analysis suggested that there might be a multi-gene family encoding for ACC synthase in cotton. From the phylogenetic tree constructed with 24 different kinds of ACC synthases, we determined that GhACS1 falls into group II, and was closely associated with the wound-inducible ACS of citrus. The analysis of the 5' flanking region of GhACS1 revealed a group of putative cis-acting elements. The results of expression analysis showed that GhACS1 displayed its transient expression nature after wounding, abscisic acid (ABA), and $CuCl_2$ treatments. These results indicate that GhACS1, which was transiently expressed in response to certain stimuli, may be involved in the production of ethylene for the transmission of stress signals.

• 대한화학회지
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• 제48권1호
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• pp.46-52
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• 2004

층상구조를 갖는 망간산화물에서 결정성과 구조적 안정도 간의 관계에 대해 조사하였다. 좋은 결정성을 갖는 망간산화물은 고상합성법-이온교환법을 이용하여 합성하였으며, 나노결정 망간산화물은 실온에서의 Chimie-Douce 반응을 통해 얻어졌다. 마이크로 라만 분광과 X선 흡수분광 결과는 결정성에 상관없이 이들 화합물에 존재하는 망간이온이 공통적으로 층상구조의 팔면체 자리에 안정화되어 있음을 보여준다. 미분전하용량 분석 결과는 나노결정 화합물의 층상구조가 전기화학적 충방전 과정 동안 안정하다는 사실을 보여주며, 이와는 대조적으로 좋은 결정성을 갖는 층상구조 화합물의 경우 현저한 구조변화를 겪는다는 사실을 보여준다. 마이크로 라만 분광 결과는 이러한 구조전이가 층상 구조로부터 스핀넬 타입 구조로의 변화에 해당함을 보여준다. 위 실험 결과로부터 나노결정성이 층상구조의 안정도를 향상시킨다는 결론을 얻을 수 있었다.