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Dance motion generation by recombination of body parts from motion source
Lee, Minho,Lee, Kyogu,Lee, Mihee,Park, Jaeheung Springer-Verlag 2018 INTELLIGENT SERVICE ROBOTICS Vol.11 No.2
<P>In this paper, we propose an approach to synthesize new dance routines by combining body part motions from a human motion database. The proposed approach aims to provide a movement source to allow robots or animation characters to perform improvised dances to music, and also to inspire choreographers with the provided movements. Based on the observation that some body parts perform more appropriately than other body parts during dance performances, a correlation analysis of music and motion is conducted to identify the expressive body parts. We then combine the body part movement sources to create a new motion, which differs from all sources in the database. The generated performances are evaluated by a user questionnaire assessment, and the results are discussed to understand what is important in generating more appealing dance routines.</P>
Lee, Byeongno,Kang, Seung Hee,Kang, Donghyeon,Lee, Kyu Hyung,Cho, Jaeheung,Nam, Wonwoo,Han, Oc Hee,Hur, Nam Hwi Royal Society of Chemistry 2011 Chemical communications Vol.47 No.40
<P>A solid hydrazine was isolated as a crystalline powder by reacting aqueous hydrazine with supercritical CO<SUB>2</SUB>. Its structure determined by single crystal X-ray diffraction shows a zwitterionic form of NH<SUB>3</SUB><SUP>+</SUP>NHCO<SUB>2</SUB><SUP>−</SUP>. The solid hydrazine is remarkably stable but is as reactive as liquid hydrazine even in the absence of solvents.</P> <P>Graphic Abstract</P><P>A stable solid hydrazine prepared in supercritical CO<SUB>2</SUB> has a zwitterionic structure, exhibiting superior activity toward carbonyl compounds even in the absence of solvents. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cc14542h'> </P>
Synthesis of azines in solid state: reactivity of solid hydrazine with aldehydes and ketones.
Lee, Byeongno,Lee, Kyu Hyung,Cho, Jaeheung,Nam, Wonwoo,Hur, Nam Hwi American Chemical Society 2011 ORGANIC LETTERS Vol.13 No.24
<P>Highly conjugated azines were prepared by solid state grinding of solid hydrazine and carbonyl compounds such as aldehydes and ketones, using a mortar and a pestle. Complete conversion to the azine product is generally achieved at room temperature within 24 h, without using solvents or additives. The solid-state reactions afford azines as the sole products with greater than 97% yield, producing only water and carbon dioxide as waste.</P>
Lee, Hogyu,Kim, Jun Hee,Lee, Won Koo,Cho, Jaeheung,Nam, Wonwoo,Lee, Jaedeok,Ha, Hyun-Joon The Royal Society of Chemistry 2013 Organic & Biomolecular Chemistry Vol.11 No.22
<P>Polyhydroxylated pyrrolidines, such as biologically important azafuranoses represented by the natural product (+)-2,5-imino-2,5,6-trideoxy-<I>gulo</I>-heptitol and its C(3)-epimer, were elaborated from a commercially available enantiomerically pure (2<I>R</I>)-hydroxymethylaziridine by highly stereoselective directed reactions in more than 61% overall yield. At first, the nucleophile 2-trimethylsilyloxyfuran was directed to (2<I>R</I>)-aziridine-2-carboxaldehyde by ZnBr<SUB>2</SUB> to yield the unusual <I>anti</I>-addition product as a single isomer via the chelation-controlled transition. The ring opening of aziridine was followed by conjugate addition to give a <I>cis</I>-fused bicycle, which was converted to the target molecule after the required reductive operations.</P> <P>Graphic Abstract</P><P>Azafuranoses represented by the natural product (+)-2,5-imino-2,5,6-trideoxy-gulo-heptitol and its C(3)-epimer were elaborated from a commercially available enantiomerically pure (2<I>R</I>)-hydroxymethylaziridine by highly stereoselective directed reactions.. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3ob27390c'> </P>
이재흥(Jaeheung Lee),오진하(Jinha Oh),김석현(Seokhyun Kim),이상호(Sangho Yi),허준영(Junyoung Heo),조유근(Yookun Cho),홍지만(Jiman Hong) 한국정보과학회 2008 정보과학회 컴퓨팅의 실제 논문지 Vol.14 No.3
대부분의 파일 시스템에서는 파일이 삭제되더라도 메타데이타만 삭제되거나 변경될 뿐, 파일의 데이타는 물리 매체에 계속 저장된다. 그렇기 때문에 지워진 파일을 복구하는 것도 가능한데 이러한 복구를 불가능하도록 하는 것을 원하는 사용자들도 있다. 특히 이러한 요구는 플래시 메모리를 저장 장치로 사용하는 임베디드 시스템에서 더욱 더 많아지고 있다. 이에 본 논문에서는 NAND 플래시 파일 시스템을 위한 안전 삭제 기법을 제안하고 이를 가장 대표적인 NAND 플래시 파일 시스템인 YAFFS에 적용하였다. 제안 기법은 암호화를 기반으로 하고 있으며, 특정 파일을 암호화하는데 사용된 모든 키들이 같은 블록에 저장되도록 하여, 단 한번의 블록 삭제 연산으로 파일 복구가 불가능하도록 하였다. 시뮬레이션 결과는 제안 기법으로 인해 파일의 생성 및 변경 시 발생하는 블록 삭제를 감안하더라도 파일 삭제 시 발생하는 블록 삭제 횟수가 단순 암호화 기법의 경우보다 더 작다는 것을 보여준다. 본 논문에서는 제안 기법을 YAFFS에만 적용하였지만, 다른 NAND 플래시 전용 파일 시스템에도 쉽게 적용 가능하다. In most file systems, if a file is deleted, only the metadata of the file is deleted or modified and the file's data is still stored on the physical media. Some users require that deleted files no longer be accessible. This requirement is more important in embedded systems that employ flash memory as a storage medium. In this paper, we propose a secure deletion method for NAND flash file system and apply the method to YAFFS. Our method uses encryption to delete files and forces all keys of a specific file to be stored in the same block. Therefore, only one erase operation is required to securely delete a file. Our simulation results show that the amortized number of block erases is smaller than the simple encryption method. Even though we apply our method only to the YAFFS, our method can be easily applied to other NAND flash file systems.