Computational Analysis on Response Behaviors of Tetranychusurticae after the Treatments of Abamectin

Mu Qiao,Bu-Keun Chung,Chang-Woo JI,Tae-Soo Chon 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05

Movement behaviors of specimens of mite (Tetranychus urticae) were computationally analyzed after the treatments of pesticide, abamectin, at a low concentration of 0.78ppb. During the observation period, test specimens were placed individually on the bean leaves (diameter=7mm), and their position was recorded in 2-dimension at 0.25 second intervals (8 hours before treatment and 8 hours after treatment). The selected parameters such as speed, angular change, meander, etc, were checked for characterizing response behaviors after the treatments. The difference of mite behavior was accordingly observed after the treatments, and the time spent in the center area appeared to be longer after the treatments. Additional characterization of movement behaviors was computationally checked, and utilization of behavioral monitoring in pest management was further discussed regarding early detection of susceptible or resistant strains.

A Smart Seat Designed for Crash Safety

Qiao-Chu Cai,Kwang-Hee Lee,Chul-Hee Lee,Chang-Bong Hong 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

When the automobile industry has begun, the safety performance is always an important indicator to evaluate the vehicles. As the vehicle industry has developed, many safety devices is invented to protect the passengers of the car, as air bags, sensing systems, head restraints, impact absorbing interior materials, seat belts and so on. In the present work, the smart seat is controlled by a sensor, which is designed to detect the crash and automatically control the seat of the drivers to move back and lay down the backrest of the seat before crash. The actuating system of the seat is composed by electric motors, screw rods driven by the electric motor and connecting devices. With such electromechanical systems, when the crash happens, the driver will keep at a safer gesture and the direct crash to the steer wheel will be avoided. The design concept with computer aided simulation is introduced in the paper. With the performance checked in LS-DYNA with a dummy crash model, the evaluation of the dummy during the back motion of the seat and the crash is conducted.

Improvement of electrochemical performance of NaCrO2 by removing electrochemically inert sodium ions

Chang Su,Guo-Qiang Liu,Yixuan Zhang,Danlei Qiao 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-

In this study, we used ultrasonic treatment and ethanol cleaning (UE treatment) to remove a smallamount of electrochemically inert Na+ ions from the surface lattice of NaCrO2 to obtain a modified materialNaCrO2-UE. Its electrochemical properties were significantly improved. At a rate of 10C, the initialdischarge capacity of NaCrO2-UE was 115.8 mAh/g, and the retention rate was 87.0 % after 500 cycles. Moreover, at a higher rate of 40C, it could deliver a discharge capacity of 111.4 mAh/g. In addition, thedischarge voltage plateau of NaCrO2-UE reached 2.91 V, while the discharge voltage plateau of pristineNaCrO2 was 2.78 V.

Morphological Transformation of Co(OH)₂ Microspheres from Solid to Flowerlike Hollow Core–Shell Structures

Qiao, Ru,Zhang, Xiao Li,Qiu, Ri,Kim, Ju Chang,Kang, Young Soo WILEY-VCH Verlag 2009 Chemistry Vol.15 No.8

<P>Co(OH)<SUB>2</SUB> that blooms: Flowerlike hollow spherical architectures of cobalt hydroxide obtained through a facile solvothermal process are reported for the first time (see picture). Their growth process involves aggregation of cobalt hydroxide nanoparticles into solid spheres and a hollowing effect through subsequent dissolution-diffusion-redeposition of the smaller crystallites under the surface layer. <img src='wiley_img/09476539-2009-15-8-CHEM200800803-content.gif' alt='wiley_img/09476539-2009-15-8-CHEM200800803-content'> </P><P>We report, for the first time, a detailed investigation into the formation of highly uniform, 3D, flowerlike, hollow, spherical architectures of cobalt hydroxide through a facile solvothermal process. Various controlling parameters were examined, such as water content in starting materials, reaction time, cobalt(II) precursor concentration, and reaction temperature. On the basis of the experimental results, the formation mechanism of these flowerlike cobalt hydroxide hollow spheres involves aggregation of cobalt hydroxide building clusters into solid spheres and hollowing effect through subsequent dissolution, diffusion, and re-deposition of the smaller crystallites under the surface layer driven by an Ostwald ripening process. Metallic cobalt hollow spheres have also been obtained by thermal decomposition of cobalt hydroxide flowers in a mixed gas of Ar+4 % H<SUB>2</SUB> at 400 °C. The morphology and composition of the products were characterized by X-ray diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and (high resolution) transmission electron microscopy.</P> <B>Graphic Abstract</B> <P>Co(OH)<SUB>2</SUB> that blooms: Flowerlike hollow spherical architectures of cobalt hydroxide obtained through a facile solvothermal process are reported for the first time (see picture). Their growth process involves aggregation of cobalt hydroxide nanoparticles into solid spheres and a hollowing effect through subsequent dissolution-diffusion-redeposition of the smaller crystallites under the surface layer. <img src='wiley_img/09476539-2009-15-8-CHEM200800803-content.gif' alt='wiley_img/09476539-2009-15-8-CHEM200800803-content'> </P>

Modeling and Implementation of Fixed Switching Frequency Sliding Mode Control to Two-Stage DC-DC Converter

Chang-hao Piao,Chao Jiang,Hongtao Qiao,조종두,Sheng Lu 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.6

A fixed switching frequency sliding mode (FSFSM) controller for two-stage DC-DC converter is proposed. Owing to the time-varying switched mode operation, the dynamic performance of two-stage converter becomes high order and non-linear. For designing the FSFSM controller, the state-space average model is made, and then the three conditions of sliding mode (SM) control, namely, hitting, existence and stability condition are analyzed. A conventional linear controller (Lag) for two-stage converter is designed as a comparison to validate the good robustness and dynamic response of the FSFSM controller. At last, a series of simulation and experimental results are presented to demonstrate the feasibility of the designed FSFSM controller.

Density estimation of Bemisia tabaci (Hemiptera: Aleyrodidae) in a greenhouse using sticky traps in conjunction with an image processing system

Qiao, Mu,Lim, Jae-Hong,Ji, Chang-Woo,Chung, Bu-Keun,Kim, Hwang-Yang,Uhm, Ki-Baik,Myung, Cheol-Soo,Cho, Jong-Man,Chon, Tae-Soo 한국응용곤충학회 2008 Journal of Asia-Pacific Entomology Vol. No.

Accurate forecasting of pest density is essential for effective pest management. In this study, a simple Image processing system that automatically estimated the density of whiteflies on sticky traps was developed. The estimated densities of samples in a laboratory and a greenhouse were in accordance with the actual values. The detection system was especially efficient when the whitefly densities were at medium to high levels, however, the development of identification algorithms and more appropriate collection methods may improve the image processing system. Taken together, the results of this study indicate that the image processing system described here may be useful for evaluating the population dynamics.

Research on the Artificial Neural Network Unfolding Method for the Water-Pumping-Injection Multi-Homocentric Sphere Neutron Spectrometer

Kang Chang,Yi Cheng,Jian-Bo Yang,Yujie Qiao,Rui Li,Can Zhang 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.6

This work aimed to study an algorithm for the unfolding spectrum acquired by using a water-pumping-injection multi-homocentric sphere neutron spectrometer. The readings of the water-pumping-injection multi-homocentric sphere neutron spectrometer under 32 different neutron sources, including $^{241}$Am-Be spontaneous, $^{238}$Pu Watt, and $^{232}$Th Maxwell fission, were obtained by using the FLUKA Monte Carlo code and were input as the neural network training values for constructing the method of back-propagation artificial neural network neutron spectrum unfolding (MBANSU). Two neutron readings that were Monte Carlo experimentally measured from $^{252}$Cf spontaneous and $^{245}$Cm Maxwell fission sources were used as the testing values for MBANSU. The calculated neutron energy spectrum was in good agreement with the ENDF energy spectrum, and the information entropy of the result spectrum approximated that of the ENDF spectrum. Results indicate that the established MBANSU algorithm has potential applications for unfolding spectra collected by using the water-pumping-injection multi-homocentric sphere neutron spectrometer.

Study on the different effects of aluminum doping on Fe-Mn and Ni-Mn based compounds as cathode material for sodium-ion batteries

Danlei Qiao,Yixuan Zhang,Chang Su,Guoqiang Liu,Qingxiang Wang,Lei Wen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-

Al-doped Fe-Mn and Ni-Mn based materials with P2-type layered structure has been synthesized andtested as a positive electrode material for rechargeable sodium batteries. The modification mechanismsof Al doping in Fe-Mn and Ni-Mn based materials have been discussed. The synthesized Al-doped Ni-Mnbased material Na0.67Mn0.8Ni0.16Al0.04O2 delivers a reversible capacity of 135.1 mAh g1, which correspondsto 92.1% of the initial capacity with excellent cyclability for 200 cycles. What’s more, it can stillremain a capacity of 96.2 mAh g1 at a current density of 2000 mA g1. When the voltage range increaseto 1.5 – 4.3 V, its initial discharge capacity can reach 190.3 mAh g1.

Electrochemical surface oxidation of carbon nanofibers

Yoon, Chang-Min,Long, Donghui,Jang, Sang-Min,Qiao, Wenming,Ling, Licheng,Miyawaki, Jin,Rhee, Choong-Kyun,Mochida, Isao,Yoon, Seong-Ho Elsevier 2011 Carbon Vol.49 No.1

<P><B>Graphical abstract</B></P><P><ce:figure id='f0045'></ce:figure></P><P><B>Research highlights</B></P><P>► Carbon nanofiber surfaces were functionalized with oxygen-bearing groups through binderless electrochemical oxidation. ► The oxidation of herringbone CNFs was initiated at a relatively low potential at both the anodic and cathodic electrodes, while the O/C atomic ratio remained relatively constant within the range of potentials investigated. ► The relative concentration of carbonyl and hydroxyl groups increased with increasing potential while the amount of carboxylic groups decreased. ► The structure of the CNF was important in determining the O/C atomic ratio, which was especially dependent on the spatial arrangement of graphene layers.</P> <P><B>Abstract</B></P><P>Carbon nanofiber (CNF) surfaces were functionalized with oxygen-bearing groups through electrochemical oxidation. The electrode was prepared without a binder, allowing easy separation of the functionalized CNFs for subsequent applications. The relationships between the applied potential and the CNF structure with the resulting O/C atomic ratio and the distribution of oxygen functional groups were investigated. Surface groups were identified and characterized by elemental analyses, X-ray photoelectron spectroscopy, micro-attenuated total reflectance FTIR, and cyclic voltammetry. The oxidation of herringbone CNFs was initiated at a relatively low potential at both the anodic and cathodic electrodes, while the O/C atomic ratio remained relatively constant within the range of potentials investigated. The relative concentration of carbonyl and hydroxyl groups increased with increasing potential while the amount of carboxylic groups decreased. The structure of the CNF was important in determining the O/C atomic ratio, which was especially dependent on the spatial arrangement of graphene layers. Tubular CNFs exhibited low O/C atomic ratios while herringbone CNFs, which have a higher surface area, exhibited the largest ratios. The dispersion of the CNFs in water was much more homogeneous following electrochemical oxidation.</P>

The Clinicopathological and Prognostic Impact of 14-3-3 Protein Isoforms Expression in Human Cholangiocarcinoma by Immunohistochemistry

Wu, Qiao,Liu, Chang-Zheng,Tao, Lian-Yuan,Yu, Lan,Liu, Wei,Chen, Song-Sen,He, Xiao-Dong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.4

The 14-3-3 proteins are highly conserved, ubiquitous molecules involved in a variety of biologic phenomena, such as cell cycle control, and apoptosis. However, their expression in cholangiocarcinoma has not been previously characterized. In this paper, immunohistochemistry using specific anti-14-3-3 monoclonal antibodies was performed on formalin-fixed;, paraffin embedded archival tissue from 86 patients of cholangiocarcinoma. We also examined the correlation between expression and survival rate and clinicopathologic factors such as tumor location, tumor size, pathologic differentiation, lymphatic permeation, lymph node metastasis, and tumor stage. Positive 14-3-3 proteins expression was observed for 6 isoforms (${\beta}$, ${\sigma}$, ${\gamma}$, ${\theta}$, ${\delta}$, ${\eta}$) of these proteins in 86 patients of cholangiocarcinoma. ${\beta}$ and ${\sigma}$ isoform immunoreactivity was correlated with lymph node metastasis, tumor stage and patients' survival rate. In addition, ${\delta}$ isoform immunoreactivity showed trends with tumor location, tumor size, pathologic differentiation and tumor stage, while the ${\theta}$ isoform was correlated with pathologic differentiation. These results indicated that upregulated expression of some isoforms of 14-3-3 may be a common mechanism for evading apoptosis in cholangiocarcinoma, so that targeting 14-3-3 may be a novel promising strategy for the treatment of this tumor.