Response of plasma rotation to resonant magnetic perturbations in J-TEXT tokamak

Yan, W,Chen, Z Y,Huang, D W,Hu, Q M,Shi, Y J,Ding, Y H,Cheng, Z F,Yang, Z J,Pan, X M,Lee, S G,Tong, R H,Wei, Y N,Dong, Y B IOP 2018 Plasma physics and controlled fusion Vol.60 No.3

<P>The response of plasma toroidal rotation to the external resonant magnetic perturbations (RMP) has been investigated in Joint Texas Experimental Tokamak (J-TEXT) ohmic heating plasmas. For the J-TEXT’s plasmas without the application of RMP, the core toroidal rotation is in the counter-current direction while the edge rotation is near zero or slightly in the co-current direction. Both static RMP experiments and rotating RMP experiments have been applied to investigate the plasma toroidal rotation. The core toroidal rotation decreases to lower level with static RMP. At the same time, the edge rotation can spin to more than 20 km s<SUP>−1</SUP> in co-current direction. On the other hand, the core plasma rotation can be slowed down or be accelerated with the rotating RMP. When the rotating RMP frequency is higher than mode frequency, the plasma rotation can be accelerated to the rotating RMP frequency. The plasma confinement is improved with high frequency rotating RMP. The plasma rotation is decelerated to the rotating RMP frequency when the rotating RMP frequency is lower than the mode frequency. The plasma confinement also degrades with low frequency rotating RMP.</P>

Vitamin E improves antioxidant status but not lipid metabolism in laying hens fed a aged corn-containing diet

Ding, X.M.,Mu, Y.D.,Zhang, K.Y.,Wang, J.P.,Bai, S.P.,Zeng, Q.F.,Peng, H.W. Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.2

Objective: The objective of this study was to determine whether a dietary vitamin E (VE) supplement could alleviate any detrimental effects of aged corn on lipid metabolism and antioxidant status in laying hens. Methods: The experiment consisted of a 2×3 factorial design with two corn types (normal corn and aged corn (stored for 4 yr) and three concentrations of VE (0, 20, and 100 IU/kg). A total of 216 Lohmann laying hens (50 wk of age) were randomly allocated into six treatment diets for 12 wk. Each treatment had 6 replicates of 6 hens per replicate. Results: The results show that aged corn significantly decreased the content of low-density lipoprotein cholesterol (p<0.05), and reduced chemokine-like receptor 1 (CMKLR1) mRNA expression (p<0.05) in the liver compared to controls. Diet with VE did not alter the content of crude fat and cholesterol (p>0.05), or acetyl-CoA carboxylase, lipoprotein lipase, fatty acid synthase or CMKLR1 mRNA expression (p>0.05) in the liver among treatment groups. Aged corn significantly increased the content of malondialdehyde (MDA) (p<0.05) and decreased superoxide dismutase (SOD) activity (p<0.05) in the liver. The VE increased the content of MDA (p<0.05) but decreased glutathione peroxidase (GSH-Px) activity in serum (p<0.01) and in the ovaries (p<0.05). Adding VE at 20 and 100 IU/kg significantly increased GSH-Px activity (p<0.05) in liver and in serum (p<0.01), 100 IU/kg VE significantly increased SOD activity (p<0.05) in serum. Aged corn had no significant effects on GSH-Px mRNA or SOD mRNA expression (p<0.01) in the liver and ovaries. Addition of 100 IU/kg VE could significantly increase SOD mRNA expression (p<0.01) in the liver and ovary. Conclusion: Aged corn affected lipid metabolism and decreased the antioxidant function of laying hens. Dietary VE supplementation was unable to counteract the negative effects of aged corn on lipid metabolism. However, addition of 100 IU/kg VE prevented aged corninduced lipid peroxidation in the organs of laying hens.

A Parallel Control Scheme for ABR Services in ATM Networks

Q.L.Ding,S.C.Liew 한국통신학회 2002 Journal of communications and networks Vol.4 No.2

A Parallel Control Scheme for ABR Services in ATM Networks

Ding, Q.L.,Liew, S.C. The Korea Institute of Information and Commucation 2002 Journal of communications and networks Vol.4 No.2

This paper proposes a new scheme - parallel control scheme with feedback control (PCFC) for ABR services in ATM networks. The information from a source is split into a number of streams, for delivery over separate parallel connections with particular coding. At the receiver, the original information is reconstructed by the received packet from the parallel connections. The effects of PCFC on the network performance are due to two factors: Traffic splitting and load balancing. By combinations of analysis and simulation, this paper studies the implications of PCFC for how the ABR parameters should be scaled and the advantages of PCFC compared with other existing schemes.

OIL/WATER INTERFACE SYNTHESIS AND OPTICAL PROPERTY OF STRONTIUM TUNGSTATE NANORODS

Y. CHEN,Q. S. WU,Y. P. DING 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2007 NANO Vol.2 No.3

Strontium tungstate nanorods with uniform morphology were controllably synthesized for the first time via a facile liquid–solid–solution (LSS) process through oil/water interface. These nanorods have diameters of about 50 nm and length of about 500 nm. XRD curves indicated that as-obtained nanorods were body-centered tetragonal phases with lattice parameters of a = 5.416 Å and c = 11.95 Å, which is consistent with the values reported in JCPDS card No. 08-0490. Study on the optical properties of as-obtained nanorods showed that SrWO4 nanorods possess different optical properties from bulk counterpart. A mechanism of the formation process was also discussed.

Estimation of growth parameters of Listeria monocytogenes after sublethal heat and slightly acidic electrolyzed water (SAEW) treatment

Xuan, X.T.,Ding, T.,Li, J.,Ahn, J.H.,Zhao, Y.,Chen, S.G.,Ye, X.Q.,Liu, D.H. Butterworths ; Taylor Francis ; Elsevier Science 2017 FOOD CONTROL Vol.71 No.-

<P>Time to detection experiments (TTD) based on turbidometry using an automatic Bioscreen C is a useful and straightforward method for estimating microbial growth parameters (lag time (lambda), growth rate (mu) and 'work to be done' (h(0))) at constant temperature. This study investigated the effects of slightly acidic electrolyzed water (SAEW) and heat treatment on Listeria monocytogenes growth at different recovery temperatures (10 degrees C, 15 degrees C, 25 degrees C, and 30 degrees C). Similar surviving and sublethally injured L. monocytogenes populations were obtained by heat treatment (55 degrees C for 10 min) and SAEW treatment (available chlorine concentration of 30 mg/l and ratio of bacteria against SAEW of 8:2 for 30 s). In these experimental conditions, stresses had greater impact on the lambda and h(0) parameter in comparison with recovery temperature while there was no great change in growth rate under isothermal conditions. Larger lambda values and h(0) parameters were observed in sublethal-heat injured L. monocytogenes (the maximum lambda and h(0) parameters are 30.199 h and 1.6492) as compared to SAEW groups (the maximum lambda and h(0) parameters are 22.634 h and 1.4396). The sensitivity analysis of SAEW and heat treatments on h(0) parameter indicated that SAEW treatment showed a higher influence. The collinearity diagnostics of independent variables [recovery temperature (T), mu, lambda] for dependent variable (h(0) parameter) demonstrated that T, mu and lambda had strong collinearity. In addition, the established secondary models in this study have good performances on predicting the effect of recovery temperature on bacterial growth parameters. (C) 2016 Elsevier Ltd. All rights reserved.</P>

Flutter analysis of Stonecutters Bridge

Michael C. H. Hui,Q. S. Ding,Y. L. Xu 한국풍공학회 2006 Wind and Structures, An International Journal (WAS Vol.9 No.2

Flutter analysis of Stonecutters Bridge

Hui, Michael C.H.,Ding, Q.S.,Xu, Y.L. Techno-Press 2006 Wind and Structures, An International Journal (WAS Vol.9 No.2

Stonecutters Bridge of Hong Kong is a cable-stayed bridge with two single-column pylons each 298 m high and an aerodynamic twin deck. The total length of the bridge is 1596 m with a main span of 1018 m. The top 118 m of the tower will comprise structural steel and concrete composite while the bottom part will be of reinforced concrete. The bridge deck at the central span will be of steel whilst the side spans will be of concrete. Stonecutters Bridge has adopted a twin-girder deck design with a wide clear separation of 14.3 m between the two longitudinal girders. Although a number of studies have been conducted to investigate the aerodynamic performance of twin-girder deck, the actual real life application of this type of deck is extremely limited. This therefore triggered the need for conducting the present studies, the main objective of which is to investigate the performance of Stonecutters Bridge against flutter at its in-service stage as well as during construction. Based on the flutter derivatives obtained from the 1:80 scale rigid section model experiment, flutter analysis was carried out using 3-D finite element based single parameter searching method developed by the second author of this paper. A total of 6 finite element models of the bridge covering the in-service stage as well as 5 construction stages were established. The dynamic characteristics of the bridge associated with these stages were computed and applied in the analyses. Apart from the critical wind speeds for the onset of flutter, the dominant modes of vibration participating in the flutter vibration were also identified. The results indicate that the bridge will be stable against flutter at its in-service stage as well as during construction at wind speeds much higher than the verification wind speed of 95 m/s (1-minute mean).

Genetic Variations Analysis and Characterization of the Fifth Intron of Porcine NRAMP1 Gene

Yan, X.M.,Ren, J.,Ai, H.S.,Ding, N.S.,Gao, J.,Guo, Y.M.,Chen, C.Y.,Ma, J.W.,Shu, Q.L.,Huang, L.S. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.9

The natural resistance-associated macrophage protein 1 (NRAMP1) gene was identified as a candidate gene controlling the resistance and susceptibility to a number of intracellular parasites in pigs. The genetic variations in a 1.6 kb region spanning exon 1 and exon 3 of the porcine NRAMP1 gene were investigated by PCR-HinfI-RFLP in samples of 1347 individuals from 21 Chinese indigenous pig populations and 3 western pig breeds. Three alleles (A, B, C) and four genotypes (AA, BB, AB, BC) were detected. Significant differences in genotype and allele frequencies were observed between Chinese indigenous pig populations and exotic pig breeds, while in general the differences in genotype and allele frequencies among Chinese indigenous pig populations were not significant. The allele C was detected only in Duroc, Leping Spotted and Dongxiang Spotted pig, and the two Chinese pig populations showed similar genotype and allele frequencies. Four Chinese Tibetan pig populations displayed genetic differentiation at the NRAMP1 gene locus. In addition, intron 5 of the NRAMP1 gene was isolated and characterized by directly sequencing the PCR products encompassing intron 5. The alignment of intron 5 of the porcine, human, equine and ovine NRAMP1 gene showed a similarity of 45.38% between pig and human, 52.55% between pig and horse, 63.47% between pig and sheep, respectively.

Ethanol Enhances Tumor Angiogenesis In Vitro Induced by Low-Dose Arsenic in Colon Cancer Cells Through Hypoxia-Inducible Factor 1 Alpha Pathway

Wang, L.,Son, Y. O.,Ding, S.,Wang, X.,Hitron, J. A.,Budhraja, A.,Lee, J. C.,Lin, Q.,Poyil, P.,Zhang, Z. Oxford University Press 2012 Toxicological Sciences Vol.130 No.2