359,089 research outputs found
Structure characterization and tribological study of magnetron sputtered nanocomposite nc-TiAlV(N, C)/a-C coatings
Full text linkGrown by reactive unbalanced magnetron sputtering in a mixed N2 and CH4 gaseous medium, heterogeneous nanocomposite coatings in the Ti-Al-V-N-C system show extraordinarily excellent tribological performance of coated machining tools. Using analytical high resolution TEM, EELS, FEG-SEM, XRD, and Raman spectroscopy, this paper reports detailed structural and chemical characterization of the coatings grown at various CH4: N2 ratios. Meanwhile, the mechanical and tribological properties were also measured, including hardness, Young’s modulus, residual stress and the dry-sliding friction and wear at varying environmental humidity. When CH4 gas was introduced in the deposition, the structure of the coatings has been found to experience a change from nano-scale TiAlN-VN multilayer architecture to a complex mixture of columnar grains of nc-TiAlV(N,C)/a-C nanocomposites and inter-column network of sp2-type amorphous carbon. Carbon incorporation and segregation also shows remarkable influence on the columnar growth model by leading to finer grain size. As compared to the carbon-free nitride coating, the nanocomposite coatings showed substantially reduced residual stress owing to the free-carbon precipitation, whereas the coatings maintained comparable hardness to the carbon-free TiAlN/VN. Their tribological properties were found to be strongly dependent on the environment. In humid air at RH > 30%, the coatings showed low friction coefficient less than 0.4 and extremely low wear rate at a scale of ~10-17 m3N-1m-1
Data for: Inequality and government debt: evidence from OECD panel data
No full textData for: "Inequality and government debt: evidence from OECD panel data" from Weijie Luo
Volutellonectria consors J. Luo & W. Y. Zhuang 2012, comb. nov.
No full textVolutellonectria consors (Ellis & Everh.) J. Luo & W.Y. Zhuang, comb. nov. MycoBank MB561606 Ξ Dialonectria consors Ellis & Everh., J. Mycol. 4: 122. 1888. Ξ Nectriella consors ( Ellis & Everh.) Saccardo, Syll. Fung. 9: 941. 1891. Ξ Nectria consors (Ellis & Everh.) Seaver, Mycologia 1: 61. 1909. Ξ Cosmospora consors (Ellis & Everh.) Rossman & Samuels, Stud. Mycol. 42: 119. 1999. Anamorph: Volutella minima Höhn. Description and illustrations: Samuels (1977).Published as part of Luo, Jing & Zhuang, Wen-Ying, 2012, Volutellonectria (Ascomycota, Fungi), a new genus with Volutella anamorphs, pp. 1-10 in Phytotaxa 44 on page 5, DOI: 10.11646/phytotaxa.44.1.1, http://zenodo.org/record/489498
Simulation and measurement of leaf wetness formation in paddy rice crops
No full textThe study described in this thesis focuses on a quantification of leaf wetness formation in paddy rice crops based on insight in the physical processes of the formation of leaf wetness. For this purpose, experimental research was conducted in a tropical paddy rice field.A shielding (nocturnal net radiative loss) experiment was designed to investigate the dependence of dew formation on nocturnal net radiative loss. A simple method was developed to estimate dew amount and duration using the nightly total net radiative loss. The shielding experiment unexpectedly provided a feasible method for experimentally distinguishing dew from guttation. For a better understanding of the characteristics of the formation of leaf wetness in paddy rice crops, warm water flooding both in the paddy rice field and in a phytotron was conducted to investigate the effects of water temperature on dew formation and guttation. The experimental data indicated an optimum paddy water temperature of 30°C for rice leaf guttation. The effect of water temperature on dew formation depended on the weather condition above the canopy, especially the thermal stratification condition, net radiation and vapour pressure deficit. A simple device, the dewball, was designed to observe dew formation and to determine its threshold value of nocturnal net radiative loss from top leaves. This was shown to be a simple and accurate method for estimating daily dew duration on top leaves. The possibility of using the mean diurnal patterns of weather variables to estimate dew formation was analysed by comparing the dew estimated using a simulation model to the measured results. This helped to understand to what extent the diurnal patterns will give as good an estimate of dew formation as when the observed hourly weather data are used. Based on the observation results on the dewball and the results of the shielding experiment, a simple approach to estimate daily dew duration on top leaves of the paddy rice crops was formulated and its potential applications to plant protection were discussed
Logistics in China: Implications of accession to the WTO
No full textWenping Luo and Christopher Findla
Volutellonectria J. Luo & W. Y. Zhuang 2012, gen. nov.
No full textVolutellonectria J. Luo & W.Y. Zhuang, gen. nov. MycoBank MB561605 Etymology: The generic name refers to its connection with Volutella anamorphs, and its similarity to Nectria. Type: Dialonectria consors Ellis & Everh. Ascomata perithecial, solitary, on a thin basal stroma, superficial, obpyriform, with an acute apex, usually less than 300 µm diam., laterally collapsing or not collapsing when dry, turning dark red in 3% KOH and yellow in lactic acid, smooth or hairy. Ascomatal walls of 1 or 2 layers, cells usually irregular in shape. Asci unitunicate, clavate, with an apical ring. Ascospores uniseptate, hyaline, often smooth-walled. Anamorph Volutella.Published as part of Luo, Jing & Zhuang, Wen-Ying, 2012, Volutellonectria (Ascomycota, Fungi), a new genus with Volutella anamorphs, pp. 1-10 in Phytotaxa 44 on page 3, DOI: 10.11646/phytotaxa.44.1.1, http://zenodo.org/record/489498
Serum bile acid response to an oral glucose load is exaggerated in newly diagnosed, treatment-naive, Chinese with type 2 diabetes and is reduced by insulin-pump therapy
No full textC. Xiang, C. Chen, Y. Sun, Y. Luo, J. Ma, C. Xie, W. Huang, K. Jones, M. Horowitz, C. Rayner, T. W
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