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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, 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>
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>
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>
Teachable Machine을 이용한 개인 맞춤형 운동 애플리케이션
이근모(Lee GeunMo),권영훈(Kwon YoungHun),김현수(Kim Hyunsoo),오성훈(Oh SungHun),윤수연(Yoon SuYeon),진국현(Jin GuckHyeon),최정원(Choi JeongWon),이재흥(Lee Jaeheung) 한국정보기술학회 2024 Proceedings of KIIT Conference Vol.2024 No.5
의식주의 발전과 의료 기술 발달에 따라 인간의 평균 수명이 증가하면서, 노년기에 건강한 삶을 살고자 하는 욕구가 커졌다. 따라서 운동과 건강 관리에 대한 관심이 높아지면서 핸드폰이나 데스크탑을 통해 집에서도 쉽게 접근할 수 있는 운동 어플리케이션이 많이 출시되었다. 기존 애플리케이션은 운동 자세를 설명해 주긴 하나, 개인 트레이닝처럼 사용자의 자세가 올바른지를 체크해 줄 수 없기에 운동에 익숙하지 않은 사용자는 올바르지 않은 자세로 인해 부상을 입을 수 있다는 한계가 있다. 따라서 ai를 이용하여 사용자의 운동 자세를 교정해주는 서비스를 제공하는 헬스케어 어플리케이션 ‘HomeFit’ 을 구현하고자 한다. 이는 사용자의 부상 위험을 줄이고 운동 성취도를 높이며 운동 진입 장벽이 낮아지도록 하는 이점을 제공할 것으로 본다. As the average life expectancy of humans has increased due to advances in consciousness and medical technology, the desire to live a healthy life in old age has increased. As a result, there has been a growing interest in exercise and healthcare, and many exercise applications have been released that can be easily accessed from home on your phone or desktop. Although existing applications explain the exercise posture, they cannot check whether the users posture is correct like personal training, so users who are not familiar with exercise can get injured due to incorrect posture. Therefore, we want to implement HomeFit, a healthcare application that provides a service that corrects users exercise posture using AI. We believe that this will reduce the risk of injury, increase exercise achievement, and lower the barrier to entry for users.