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Association between the plasma concentration of melatonin and behavioral temperament in horses
Yubin Song,Jun Young Kim,Young-Jae Park,Minjung Yoon 한국축산학회 2023 한국축산학회지 Vol.65 No.5
Aggression in horses may cause serious accidents during riding and non-riding activities. Hence, predicting the temperament of horses is essential for selecting suitable horses and ensuring safety during the activity. In certain animals, such as hamsters, plasma melatonin concentrations have been correlated with aggressive behavior. However, whether this relationship applies to horses remains unclear. To address this research gap, this study aimed to evaluate differences in the plasma melatonin concentrations among horses of different breeds, ages, and sexes and examine the correlation between plasma melatonin concentrations and the temperament of the horses, including docility, affinity, dominance, and trainability. Blood samples from 32 horses were collected from the Horse Industry Complex Center of Jeonju Kijeon College. The docility, affinity, dominance, and trainability of the horses were assessed by three professional trainers who were well-acquainted with the horses. Plasma melatonin concentrations were measured using an enzyme-linked immunosorbent assay. The consequent values were compared between the horses of different breeds, ages, and sexes using a three-way analysis of variance and least significant difference post hoc test. Linear regression analysis was employed to identify the relationship between plasma melatonin concentrations and docility, affinity, dominance, and trainability. The results showed that the plasma melatonin concentrations significantly differed with breeds in Thoroughbred and cold-blooded horses. However, there were no differences in the plasma melatonin concentrations between the horse ages and sexes. Furthermore, plasma melatonin concentrations did not exhibit a significant correlation with the ranking of docility, affinity, dominance, and trainability.
A study of thermal decomposition of phases in cementitious systems using HT-XRD and TG
Song, Haemin,Jeong, Yeonung,Bae, Sungchul,Jun, Yubin,Yoon, Seyoon,Eun Oh, Jae Elsevier 2018 Construction and Building Materials Vol.169 No.-
<P><B>Abstract</B></P> <P>Significant variations have been reported on the temperature range of thermal decomposition of cementitious phases. Thus, this study identified temperature ranges on the phases in actual cementitious systems (portland cement (OPC) pastes, blended pastes of ground granulated blast furnace slag (GGBFS) with OPC, and Ca(OH)<SUB>2</SUB>-activated GGBFS) by simultaneously using thermogravimetry (TG) and high-temperature X-ray diffraction (HT-XRD) as follows: (1) 81°–91 °C for dehydration of ettringite, (2) ∼80°–240 °C for major dehydration of C-S-H, (3) ∼241°–244 °C for hydrogarnet, (4) ∼129°–138 °C for Al<SUB>2</SUB>O<SUB>3</SUB>-Fe<SUB>2</SUB>O<SUB>3</SUB>-mono phase (AFm), (5) ∼411°–427 °C for Ca(OH)<SUB>2</SUB>, and (6) ∼648°–691 °C for CaCO<SUB>3</SUB>. The CaO layers and SiO<SUB>2</SUB> chains of C-S-H likely started to decompose from 615°–630 °C, and eventually transformed to new crystalline phases. This study also demonstrated that (a) the quantity of calcite could be overestimated due to additional carbonation when Ca(OH)<SUB>2</SUB> is plentifully present in samples, and (b) the quantification of phases would be greatly affected by sample particle size when GGBFS is used in the system.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This study suggests correct decompositional temperatures of cementitious phases. </LI> <LI> DTG peaks of a phase can be affected by the presence of other phases. </LI> <LI> In TG, when Ca(OH)<SUB>2</SUB> plentifully exists, the weight of CaCO<SUB>3</SUB> can be overestimated. </LI> <LI> The gas type in TG (N<SUB>2</SUB> vs. air) had no significant influence on TG below 800 °C. </LI> <LI> Different heating rates and sample fineness can alter the TG results. </LI> </UL> </P>
Qihong Xian,Yubin Wang,Fan Wang,Ruixin Li,Song Wang 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.2
In a DC microgrid, the negative damping characteristics of a constant power load can deteriorate the stability of the whole system. To improve the robustness and stability of the DC microgrid, a hybrid passivity-based control of damping injection is presented in this paper. The stability of the closed-loop system is ensured by the energy dissipation property of the passivity-based control. A proportional-integral controller is integrated with the passivity-based controller to form a hybrid passivity-based control to improve control robustness. A small-signal model of a DC power system with constant power load is derived in detail, and the stability of the system is analyzed with the Lyapunov eigenvalue method. The proposed hybrid passivity-based control provides the system with a faster recovery and a larger power boundary when compared with the typical voltage-current dual-loop control. First, the proposed control is verified by simulation of the DC power system based on MATLAB/Simulink, and the feasibility and superiority of the proposed control are further verified by hardware-in-loop (HIL) experiments based on real-time laboratory (RT-Lab) and a TI DSP TMS320 F28335.
ISG를 적용한 1.0 L 가솔린엔진의 성능개선에 관한 연구
유준상(Junsang Yoo),윤여빈(Yubin Yoon),조용석(Yongseok Cho),최웅철(Woongchul Choi),이호기(Hoki Yi),송춘섭(Chunsub Song) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
This paper presents an advanced ISG system for internal combustion engines and hybrid electric vehicle applications to reduce fuel consumption, reduce emissions, and enhance energy efficiency and increase torque. The ISG system provides all the functions of engine starter motor and alternator in one electric system installed between the engine without significantly increasing the weight and volume of the vehicle. Torque improvement test were performed at low engine speed with ISG system that deliver WRSM power to the crankshaft. Conclusions are drawn as to the torque improvement of the ISG system.
외장형 연료펌프를 사용한 LPLi 연료공급시스템에서의 연료상태량 변화 예측
김재형(Jaehyung Kim),윤여빈(Yubin Yoon),송춘섭(Chunsub Song),박영준(Youngjoon Park),이성욱(Seangwock Lee),조용석(Yongseok Cho) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The LPG(Liquefied Petroleum Gas) fuel attracts attention as a clean alternative fuel. In order to further reduce the exhaust emission and improve performance in LPG engines, the LPLi(Liquid Phase LPG Injection) system is used. In LPLi system, the fuel pump performance is important for keeping the LPG over its saturated vapor pressure. An external fuel pump is needed to improve the durability and the ease of maintenance for LPG engines. This paper predicted the variation of fuel properties on the LPLi system with an external fuel pump. From each components thermodynamic model, an 1-D simulation is developed for LPLi systerm with an external fuel pump. Then the 1-D simulation data analyzed and compared with the rig-test and chassis dynamometer test. The 1-D simulation, the rig-test and the chassis dynamometer test produced similar results.
Direct Chemical Vapor Deposition-Derived Graphene Glasses Targeting Wide Ranged Applications
Sun, Jingyu,Chen, Yubin,Priydarshi, Manish Kr.,Chen, Zhang,Bachmatiuk, Alicja,Zou, Zhiyu,Chen, Zhaolong,Song, Xiuju,Gao, Yanfeng,Rü,mmeli, Mark H.,Zhang, Yanfeng,Liu, Zhongfan American Chemical Society 2015 NANO LETTERS Vol.15 No.9
<P>Direct growth of graphene on traditional glasses is of great importance for various daily life applications. We report herein the catalyst-free atmospheric-pressure chemical vapor deposition approach to directly synthesizing large-area, uniform graphene films on solid glasses. The optical transparency and sheet resistance of such kinds of graphene glasses can be readily adjusted together with the experimentally tunable layer thickness of graphene. More significantly, these graphene glasses find a broad range of real applications by enabling the low-cost construction of heating devices, transparent electrodes, photocatalytic plates, and smart windows. With a practical scalability, the present work will stimulate various applications of transparent, electrically and thermally conductive graphene glasses in real-life scenarios.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2015/nalefd.2015.15.issue-9/acs.nanolett.5b01936/production/images/medium/nl-2015-019367_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl5b01936'>ACS Electronic Supporting Info</A></P>