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Sojin Jeong,Jihye Kim,Hanul Cho,Hwakyeung Jeong,Byungman Kang,Sang Ho Lim 한국분석과학회 2024 분석과학 Vol.37 No.2
We present a rapid method for the determination of Cs, Sr, and Ba, heat generators found in highly active liquid wastes, by gas-pressurized extraction chromatography (GPEC) using a column containing a cationexchange resin. GPEC is a microscale column chromatographic technique that uses a constant flow rate of solvent (0.07 mL/min) with pressurized nitrogen gas supplied through a valve. In particular, because this method uses a small sample volume (a few hundred microliters), it produces less chemical waste and allows for faster separation compared to traditional column chromatography. In this study, we evaluated the separation of Cs, Sr, and Ba using GPEC. The eluate from the column (GPEC or conventional column chromatography) was quantitatively analyzed using inductively coupled plasma-mass spectrometry to measure the column recovery and precision. The column reproducibility of the proposed GPEC system (RSDs of recoveries) ranged from 2.7 to 4.1 %, and the column recoveries for the three elements ranged from 72 to 98% when aqueous HCl was used as the eluent. The GPEC results are slightly different in efficiency and separation resolution compared to those of conventional column chromatography because of the differences in the eluent flow rate as well as the internal diameter and length of the column. However, the two methods had similar recoveries for Cs and Sr, and the precision of GPEC was improved by two-fold. Remarkably, the solvent volume required for GPEC analysis was five times lower than that of the conventional method, and the total analysis time was 11 times shorter.
성별과 연령에 따라 선호되는 제스처 명령어의 특성 차이에 대한 연구
Hanul Bang,Eunjung Choi,Heejin Kim,Bora Kang,Mingyu Lee,Seungjae Oh,Dong Yeong Jeong,Min K. Chung 대한산업공학회 2013 대한산업공학회 추계학술대회논문집 Vol.2013 No.11
Objective: This study aims to identify the differences of preferred gestures for devices in kitchen and bathroom according to gender and age. Background: Recently, various studies related to gesture interfaces have focused on designing intuitive gesture commands to enhance the usability of the interfaces, and they have tried to derive gestures from users. However, there are few studies to identify the differences of preferred gestures according to age or gender. Method: 32 participants were recruited with consideration of various ages and gender. In the experiment, participants evaluated their preference for each gesture candidate using a 100-point scale after watching each video showing gesture candidates. Two criteria were used to select preferred gestures for each command: average point of preference (above 50) and the frequency selected as the most preferred gesture among gesture candidates (above median). Results: As a result, although several gestures were equally preferred among the different age groups and gender groups, different characteristics for preferred gestures were identified according to the groups. Conclusion: To enhance the usability of gesture interface, the preference properties for gesture commands according to age or gender should be considered from the beginning stage of designing gestures. Application: The results of this study can be used as a guideline to design user preferred gesture and can contribute to alleviate ‘Digital divide’ phenomenon.
Taxonomic study of subtribe Olethreutae (Lepidoptera: Tortricidae: Olethreutinae) from Korea
Jeong-Nam Kim,Ulziijargal Bayarsaikhan,Hanul Kim,Seok-Hoon Choi,Yang-Seop Bae 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
The subtribe Olethreutae Diakonoff (1973) which is one of the large subtribe in the subfamily Olethreutinae in the Tortricidae. Diakonoff classified the Olethreutae into a total of 27 genera and three genus groups: Olethreutes, Hedya, and Apotomis. According to the check list of insects from Korea (KSAE & ESK, 2021), 62 species from 11 genera of Olethreutae have been recorded in Korea. This study, provided with redescriptions, distribution, host plants, along with illustrations of adults, male and female genitalia are given.
Taxonomic study of subfamily Epipaschiinae (Lepidoptera, Pyralidae) in Korea
Hanul Kim,Ulziijargal Bayarsaikhan,Chang-Moon Jang,Jeong-Nam Kim,Seokhoon Choi,Yang-Seop Bae 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
The subfamily Epipaschiinae belongs to the family Pyralidae in the superfamily Pyraloidea. Moths of the epipaschiine are mostly medium-sized, and around 705 species have been described worldwide, with most of them distributed in Tropical and Temperate Regions (Nuss et al., 2023). In this study, 24 species of 10 genera of the subfamily Epipaschiinae are identified. All of the species are accompanied by distributions, host plants, and collection site information. Illustrations of adults, male and female genitalia are provided.
Characteristics of preferred gestures for home appliances and devices
Hanul Bang,Eunjung Choi,Heejin Kim,Bora Kang,Mingyu Lee,Seungjae Oh,Dong Yeong Jeong,Min K. Chung,Sung H. Han 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5
This study aims to identify the characteristics of preferred gestures for using electronic devices by age. Gestures are affected by the personal mental concept, which varies with age. This is, gesture preference could be different depending on age. Few studies have been conducted to identify the similarities and differences of preferred gestures by age. In an experiment, a total of 32 participants were recruited with various age bands. The participants evaluated their preference level for each gesture candidate using a 100-point scale after watching a video showing gesture candidates. If the average preference score for the gesture was evaluated higher than 50, the gesture was defined as the preferred one. This study performed statistical analyses to further investigate differences and similarities of the preferred gestures for each command. In addition, the top two gestures with the highest score among the preferred gestures were analyzed. The characteristics of the preferred gestures were also suggested by age.