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Emotion extraction based on multi bio-signal using back-propagation neural network
Yoo, Gilsang,Seo, Sanghyun,Hong, Sungdae,Kim, Hyeoncheol Springer-Verlag 2018 MULTIMEDIA TOOLS AND APPLICATIONS Vol.77 No.4
<P>This study proposes a system that can recognize human emotional state from bio-signal. The technology is provided to improve the interaction between humans and computers to achieve an effective human-machine that is capable for intelligent interaction. The proposed method is able to recognize six emotional states, such as joy, happiness, fear, anger, despair, and sadness. These set of emotional states are widely used for emotion recognition purposes. The result shows that the proposed method can distinguish one emotion compared to all other possible emotional states. The method is composed of two steps: 1) multi-modal bio-signal evaluation and 2) emotion recognition using artificial neural network. In the first step, we present a method to analyze and fix human sensitivity using physiological signals, such as electroencephalogram, electrocardiogram, photoplethysmogram, respiration, and galvanic skin response. The experimental analysis shows that the proposed method has good accuracy performance and could be applied on many human-computer interaction devices for emotion detection.</P>
Analysis of the effects of natural organic matter in zinc beneficiation
Silva, Rene A.,Borja, Danilo,Hwang, Gukhwa,Hong, Gilsang,Gupta, Vishal,Bradford, Scott A.,Zhang, Yahui,Kim, Hyunjung Elsevier 2017 JOURNAL OF CLEANER PRODUCTION Vol.168 No.-
<P><B>Abstract</B></P> <P>In this study, we present the analysis of the effects of Natural Organic Matter (NOM) in zinc beneficiation from abandoned mine tailings using bioleaching technologies. We used standardized Suwannee River Humic Acid (SRHA) as the NOM source to analyze the importance of the quality of the process waters and the possible side effects of NOM accumulated on mine tailings when exposed to environmental conditions. Our study proposes the use of process waters as an important variable to maintain high process efficiency. Concentrations of 20 ppm of SRHA suspended in the bioleaching medium reduced the Zn removal efficiency by 10% as compared with the process without SRHA. Similarly, at concentrations of 50 ppm of SRHA, the Zn removal efficiency decreased by 20% as compared with the process without SRHA. However, our study refutes the view that the accumulation of NOM on mine tailings could possibly reduce the process efficiency. We conclude that the suspended NOM was able to alter the process efficiency by reducing the bacterial attachment on the mine tailing's surface, which suggested the importance of the bacterial contact mechanism.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Natural Organic Matter reduces bioleaching process efficiency. </LI> <LI> Natural Organic Matter on tailings surface does not affect bioleaching efficiency. </LI> <LI> Water quality in the bioleaching process is a key parameter to maintain efficiency. </LI> <LI> 20 ppm of Natural Organic Matter in bioleaching reduces process efficiency by 10%. </LI> <LI> 50 ppm of Natural Organic Matter in bioleaching reduces process efficiency to 20%. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Min Jung Lee,Min Soo Park,Soojin Hwang,Yoon Ki Hong,Gahee Choi,Yoon Seak Suh,Seung Yeop Han,Darae Kim,Jungae Jeun,Chun-Taek Oh,이성준,한성준,김동학,김은수,Gilsang Jeong,조경상 한국분자세포생물학회 2010 Molecules and cells Vol.30 No.1
Hempseed, a rich source of polyunsaturated fatty acids (PUFAs) and phytosterols, has been recognized as a po-tential therapeutic food used for cardioprotection, prevent-ing platelet aggregation, and improving atopic dermatitis. Although several studies have revealed the physiological benefits of hempseed on a variety of animals, the effects of dietary hempseed intake on animal development are cur-rently unknown. In this study, we evaluated the develop-mental effects of the addition of hempseed meal (HSM) to the diet of Drosophila. Interestingly, dietary HSM intake was shown to increase the body size of flies by increasing cell numbers, and also truncated the larval period without affecting survival rate or longevity. The oviposition of fe-male flies was also increased by dietary HSM supplemen-tation. Interestingly, the levels of sterols, which are pre-cursors of ecdysone, a molting hormone, were found to be elevated in the larvae fed on HSM. Additionally, the hexane extracts of hempseed mimicked the effects of HSM on growth, developmental timing, and reproduction. Moreover, among the major nonpolar components of HSM, feeding on cholesterol but not PUFA mix or campesterol acceler-ated pupariation and increased body size. These results indicate that the dietary intake of HSM accelerates both body growth and developmental rates in Drosophila via the stimulation of cell growth and ecdysone synthesis. Additionally, nonpolar components of hempseed, such as cholesterol, might be responsible for the effects of HSM on development and reproduction.