• Journal of Animal Science and Technology
• /
• 제57권7호
• /
• pp.23.1-23.6
• /
• 2015

Cellulose degrading bacteria from koala faeces were isolated using caboxymethylcellulose-Congo red agar, screened in vitro for different hydrolytic enzyme activities and phylogenetically characterized using molecular tools. Bacillus sp. and Pseudomonas sp. were the most prominent bacteria from koala faeces. The isolates demonstrated good xylanase, amylase, lipase, protease, tannase and lignin peroxidase activities apart from endoglucanase activity. Furthermore many isolates grew in the presence of phenanthrene, indicating their probable application for bioremediation. Potential isolates can be exploited further for industrial enzyme production or in bioremediation of contaminated sites.

• 한국콘텐츠학회:학술대회논문집
• /
• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
• /
• pp.234-237
• /
• 2007

We report on our experience on utilization of collaborative tools for KISTI high energy physics group. Our main subject will be the new EVO (Enabling Virtual Organization) server that we hosted recently at KISTI. The EVO is a next generation collaborative tool from CalTech high energy physics group with several improvements from its predecessor VRVS (Virtual Room Videoconferencing System). EVO has the same baseline structure as in VRVS. The network of servers lies at the heart of EVO structure and one server called Panda communicates with local clients called Koala.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권2호
• /
• pp.1064-1079
• /
• 2019

Information security has become increasingly important with the rapid development of mobile devices and internet. An efficient encryption system is a key to this end. In this paper, we propose an image encryption method based on the cross diffusion of two chaotic maps. We use two chaotic sequences, namely the Logistic map and the Chebyshev map, for key generation which has larger security key space than single one. Moreover, we use these two sequences for further image encryption diffusion which decreases the correlation of neighboring pixels significantly. We conduct extensive experiments on several well-known images like Lena, Baboon, Koala, etc. Experimental results show that our algorithm has the characteristics of large key space, fast, robust to statistic attack, etc.

• 로봇학회논문지
• /
• 제3권2호
• /
• pp.154-163
• /
• 2008

This paper presents the concept for the development of a pet-type robot with an emotion engine. The pet-type robot named KOBIE (KOala roBot with Intelligent Emotion) is able to interact with a person through touch. KOBIE is equipped with tactile sensors on the body for interaction with a person through recognition of his/her touching behaviors such as "Stroke","Tickle","Hit". We have covered KOBIE with synthetic fur fabric in order to can make him/her feel affection as well. KOBIE is able to also express an emotional status that varies according to the circumstances under which it is presented. The emotion engine of KOBIE's emotion expression system generates an emotional status in an emotion vector space which is associated with a predefined needs and mood models. In order to examine the feasibility of our emotion expression system, we verified a changing emotional status in our emotion vector space by a touching behavior. We specially examined the reaction of children who have interacted with three kind of pet-type robots: KOBIE, PARO, AIBO for roughly 10 minutes to investigate the children's preference for pet-type robots.

• The Plant Pathology Journal
• /
• 제33권4호
• /
• pp.370-381
• /
• 2017

Rathayibacter tritici, which is a Gram positive, plant pathogenic, non-motile, and rod-shaped bacterium, causes spike blight in wheat and barley. For successful pathogenesis, R. tritici is associated with Anguina tritici, a nematode, which produces seed galls (ear cockles) in certain plant varieties and facilitates spread of infection. Despite significant efforts, little research is available on the mechanism of disease or bacteria-nematode association of this bacterium due to lack of genomic information. Here, we report the first complete genome sequence of R. tritici NCPPB 1953 with diverse features of this strain. The whole genome consists of one circular chromosome of 3,354,681 bp with a GC content of 69.48%. A total of 2,979 genes were predicted, comprising 2,866 protein coding genes and 49 RNA genes. The comparative genomic analyses between R. tritici NCPPB 1953 and R. toxicus strains identified 1,052 specific genes in R. tritici NCPPB 1953. Using the BlastKOALA database, we revealed that the flexible genome of R. tritici NCPPB 1953 is highly enriched in 'Environmental Information Processing' system and metabolic processes for diverse substrates. Furthermore, many specific genes of R. tritici NCPPB 1953 are distributed in substrate-binding proteins for extracellular signals including saccharides, lipids, phosphates, amino acids and metallic cations. These data provides clues on rapid and stable colonization of R. tritici for disease mechanism and nematode association.

• Journal of Microbiology and Biotechnology
• /
• 제33권11호
• /
• pp.1428-1436
• /
• 2023

The three Gram-negative, catalase- and oxidase-positive bacterial strains RS43^T, HBC28, and HBC61^T, were isolated from fresh water and subjected to a polyphasic study. Comparison of 16S rRNA gene sequence initially indicated that strains RS43^T, HBC28, and HBC61^T were closely related to species of genus Curvibacter and shared the highest sequence similarity of 98.14%, 98.21%, and 98.76%, respectively, with Curvibacter gracilis 7-1^T. Phylogenetic analysis based on genome sequences placed all strains within the genus Curvibacter. The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between the three strains and related type strains supported their recognition as two novel genospecies in the genus Curvibacter. Comparative genomic analysis revealed that the genus possessed an open pangenome. Based on KEGG BlastKOALA analyses, Curvibacter species have the potential to metabolize benzoate, phenylacetate, catechol, and salicylate, indicating their potential use in the elimination of these compounds from the water systems. The results of polyphasic characterization indicated that strain RS43^T and HBC61^T represent two novel species, for which the name Curvibacter microcysteis sp. nov. (type strain RS43^T =KCTC 92793^T=LMG 32714^T) and Curvibacter cyanobacteriorum sp. nov. (type strain HBC61^T =KCTC 92794^T=LMG 32713^T) are proposed.

• 만화애니메이션 연구
• /
• 통권30호
• /
• pp.59-86
• /
• 2013

컴퓨터 테크놀로지가 제공하는 '스펙터클'과 '사실성'은 여전히 관객을 유혹시키는 CG 애니메이션만의 강점으로. <토이스토리>의 흥행성공 이후로 픽사(PIXAR)와 드림웍스(DreamWorks)로 대표되는 수많은 극장용 CG 애니메이션이 제작되어 흥행에 성공하였고 지금도 고공행진 중이다. 한국에서도 <파이 스토리, 2006>, <빼꼼의 머그잔 여행, 2007>, <코알라 키드: 영웅의 탄생, 2012> 등 몇몇 작품들이 흥행 성공을 위해 도전장을 던졌지만 그 결과는 실로 참담하기만 했다. 과거엔 '기술력의 부족'을 원인으로 삼기도 했지만, 계속된 흥행적 시행착오를 통한 과정 속에서 창작의 기본이자 애니메이션의 특징인 '서사'와 '상상력의 이미지'가 흥행성의 핵심적 요소임이 분명해졌다. 실제 통계에 의하면, 관객이 애니메이션을 선택할 때 가장 중요하게 생각하는 것으로 '이야기'를 꼽을 정도로 서사가 애니메이션에서 차지하는 비중은 절대적이다. 특히 이야기의 요소가 되는 '인물'과 '상황, 그리고 '아이디어'들이 그 중에서 핵심적인 기능을 한다고 할 수 있다. 본 논문은 국내외로 흥행에 성공한 미국 극장용 CG 애니메이션인 <인크레더블>, <쿵푸팬더>, <슈렉>을 인물, 상황, 이미지를 중심으로 각각의 애니메이션들이 어떤 특징을 가지고 즐거움과 재미를 유발시켰는지 연구하였다. 본 논문의 분석이 국내 작가와 연출자들에게 각 작품만의 고유한 개성과 특징이 잘 드러나며, 상상력과 창의성을 기반으로 친근하면서도 특징적인 작품 개발로 이어지는 참고자료로서 조금이나마 도움이 되길 기대한다.