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2 - ( 1 - Anilinobutylidene ) - 5,5 - dimethyl - 3 - hydroxy - 2 - cyclohexen - 1 - one 의 합성과 제초활성
하현준 ( Hyun Joon Ha ) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.6
Fourteen 2-(1-anilinobutylidene)-5,5-dimethyl-3-hydroxy-2-cyclohexen-1-ones were prepared by condensation of 2-butanoyl-5,5-dimethyl-3-hydroxy-2-cyclohexen-1-one with various substituted anilines in good yield. These were tested for herbicidal activity against six different submerged paddy weed species. Most compounds showed significant activity against Echinochloa crus galli and Sagittaria pygmaea with excellent tolerance to rice.
오인영(In-Young Oh),전지준(Ji-Joon Jeon),김진범(Jin-Beom Kim),현진영(Jin-Yeong Hyeon),연제민(Je-Min Yeon),하현준(Hyun-Jun Ha),한성민(Seong-Min Han),강동건(Dong-Geon Kang),소위영(Wi-Young So) 대한운동학회 2024 아시아 운동학 학술지 Vol.26 No.1
OBJECTIVES In the modern era, there is heightened interest in understanding energy expenditure during exercise. Consequently, wearable devices such as the Galaxy Watch and Apple Watch have emerged as pivotal tools for daily health monitoring, given their convenience and increasing popularity. This study aimed to compare the calculated energy expenditure derived from the graded exercise test with readings from Galaxy and Apple Watches during a 30-min exercise session among Korean university students. Through this, we anticipate offering both motivation and clear insights into energy expenditure, thereby potentially aiding in weight management strategies for contemporary individuals. METHODS This study involved 27 college students from Korea National University of Transportation in Chungcheongbuk-do, Korea. We utilized COSMED's exercise load respiratory gas analysis system (Quark- CPET, COSMED, Rome, Italy), along with the Galaxy Watch (Galaxy Watch 5, Samsung, Seoul, Korea) and the Apple Watch (Apple watch series 5, Apple, Cupertino, USA) for measurements. Energy expenditure was monitored in real-time every 5 min throughout the 30-min exercise session. For statistical evaluations, we employed a one-way analysis of variance. Subsequent post-tests utilized the Tukey post-hoc test and Pearson correlation, with a significance level set at p<0.05. RESULTS Initially, no statistically significant difference emerged between energy expenditure readings from the graded exercise test and those from the Galaxy Watch across all time intervals: 5, 10, 15, 20, 25, and 30 min (p>0.05). Conversely, a notable difference was observed when comparing energy expenditure data from the graded exercise test to that of the Apple Watch for time intervals of 10, 15, 20, 25, and 30 min (p>0.05), although the 5-min interval did not exhibit a significant difference (p>0.05). Furthermore, a robust positive correlation was evident between the energy expenditure values derived from the graded exercise test and those from both the Galaxy Watch (r=0.952, p<0.001) and the Apple Watch (r=0.917, p<0.001). CONCLUSIONS Both devices demonstrated high reliability in calculating energy expenditure. Notably, the Galaxy Watch exhibited a more precise calculation compared to the Apple Watch, with a relative reliability margin of 3.5% higher. For individuals, especially those struggling with obesity, precise wearable devices that accurately reflect energy consumption can significantly boost motivation for exercise. Consequently, this study lays a foundation for future advancements in energy expenditure measurement tools, emphasizing enhanced convenience, reliability, and mobility.
재난 극복을 위한 소상공인 기부 및 소비 촉진 플랫폼 설계 및 구현
정인환 ( In-hwan Jeong ),배정은 ( Jung-eun Bae ),김한비 ( Han-bi Kim ),하현준 ( Hyun-joon Ha ),이수영 ( Soo-young Lee ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
코로나 19 로 인해 비대면 소비가 증가하면서 소상공인의 매출 하락이 큰 문제가 되고 있다. 이에 본 논문에서는 소상공인들이 온라인에서 물품을 등록하고 판매할 수 있는 전용 공간이며 크라우드 도네이션 기능을 제공하는 플랫폼을 제안했다. 크라우드 도네이션이란 재난 발생시 특정 지역에 필요한 물품을 소상공인에게서 얻고 소비자가 크라우드 펀딩 형식으로 가격을 지불한 후 플랫폼에서 자체적으로 재난 지역에 구호 물품을 배송해주는 것이다. 이 플랫폼을 통해 소상공인의 온라인 판매와 매출 상승을 돕고 투명한 기부 문화를 확산시킬 수 있기를 기대한다.
김성빈(Kim-Sung Been),박기우(Park-Ki Woo),박영길(Park-Young Gil),조규선(Jo-Gyu Seon),하현준(Ha-Hyun Joon),김도훈(Kim Dohoon) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.6
본 연구에서는 블록체인과 DID(Decentralized Identifier)기반 학생증 발급 및 서비스를 설명하고자 한다. 블록체인은 기존의 사용 중인 여러 Legacy System에 비하여 다루는 데이터에 대한 무결성과 투명성을 보장하여 보안적으로 매우 우수한 기술이다 본 연구는 보안적인 기대 효과를 위해 DID와 블록체인을 응용한 시스템을 사용하였다. DID를 통한 분산 신원 인증 체계를 구축하고 도커를 활용하여 학생들의 정보를 분산된 형태로 보관하고 해싱을 활용하여 정보를 저장한다 해당 시스템은 교내의 다양한 인증 절차를 간편하게 이용할 수 있고, 사용자 친화적인 UI 및 서비스를 제공할 수 있다. In this study, we intend to explain the issuance and service of student ID cards based on blockchain and DID(Decentralized Identifier). Blockchain is a very superior technology in terms of security by ensuring the integrity and transparency of data handled compared to existing legacy systems. This study used a system that applied DID and blockchain for the expected security effect. Establish a distributed identity authentication system through DID, use Docker to store student information in a distributed form, and use hashing to store information. The system can conveniently use various authentication procedures within the school, and can provide user-friendly UI and services.