134 research outputs found
Investigation of the Asian Dust Storm and Atmospheric Aerosols from Satellite Observations
No full textSingle Crystal Growth and Characterisations of Transition Metal Ion Doped TTB Ferroelectrics
No full textThe Economic Consequences of IPO Spinning
No full textUsing a sample of fifty-six companies going public in 1996--2000 in which top executives received allocations of other hot initial public offerings (IPOs) from the bookrunner, a practice known as spinning, we examine the consequences of spinning. The fifty-six IPOs had first-day returns that were, on average, 23% higher than similar IPOs. The profits collected by these executives were only a small fraction of the incremental amount of money left on the table by their companies when they went public. These companies were dramatically less likely to switch investment bankers in a follow-on offer: only 6% of issuers whose executives were spun switched underwriters, whereas 31% of other issuers switched. These findings suggest that the spinning of executives accomplished its goal of affecting corporate decisions. The Author 2010. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please e-mail: [email protected]., Oxford University Press.
Bioinspired superwetting surfaces for biosensing
No full textInspired by nature, scientists and researchers have studied the wetting behaviors on various creatures and mimicked their structures to fabricate diverse functional superwetting materials. As one kind of emerging application, the bioinspired superwettable surfaces used for biosensing have been aroused wide interests. In this review, we summarized the recent developments of bioinspired superwettable surfaces in the field of biosensing. In the first part, superwettable creatures in nature, namely, superhydrophobic self-cleaning lotus leaf, high-adhesion superhydrophobic rose petal, amphiphobic springtail, patterned wetting desert beetles, slippery pitcher plant, were introduced. In sequence, we successively described the special wetting models of superhydrophobicity, superamphiphobicity, responsive wettability, patterned wettability, and slipperiness. Then, biosensing applications based on the respective patterned wettable, superhydrophobic, responsive wettable, and slippery substrates that were combined with the common detection approaches (colorimetry, fluorescence, surface-enhanced Raman scattering (SERS), electrochemistry) were shown in detailed. At last, an insight of remaining challenges and future development for bioinspired superwetting materials applied in biosensing was provided.link_to_subscribed_fulltex
Unraveling crack stability and strain localization in staggered composites by fracture analysis on the shear-lag model
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On the sensivity of precipitation forecasts to the moist physics and the horizontal resolution of numerical model
No full textCharacteristics of Convection-triggering Drylines in the Drainage Area of Huanghe and Huaihe Rivers
No full textBased on the surface and sounding datasets, ERA5 reanalysis data from European Centre for Medium-Range Weather Forecasts (ECMWF) and the satellite images, the characteristics of convection-triggering drylines in the drainage area of Huanghe and Huaihe Rivers of China from April to September during 2010-2019 are analyzed. The result shows that the drylines mainly appear at Dezhou of Shandong, and surroundings in the north of Henan. Most of them are distributed in the quasi northwest-southeast and northeast-southwest direction, with the length of 100-200 km and the width of 50-100 km, and they generally occur at 1400 BT or 1700 BT during the daytime. The drylines mostly occur under the 500 hPa cold vortex located in Northeast China and North China, with convergence lines (or shear lines) on 700 hPa and 850 hPa weather chart, and within the low pressure behind the coastal high on the surface chart. The statistics of the surface elements shows that the temperature on the dry side is 1.9 ℃ higher than that on the wet side, while the dew point temperature on the wet side is 6.8 ℃ higher than that on dry side. The gradient of temperature, dew point temperature and specific humidity on both sides of drylines are -2.7 ℃·(100 km)-1, 10.1 ℃·(100 km)-1 and 5.9 g·kg-1·(100 km)-1, respectively. According to the statistics of sounding environment parameters, precipitable water in the wet side is higher than that on the dry side. The specific humidity on the wet side is higher than that on the dry side at 925 hPa, 850 hPa and 700 hPa. The mean convective available potential energy on the wet side is much larger than that on the dry side. The temperature differences are very small on both sides of the drylines at 850 hPa and 500 hPa, 700 hPa and 500 hPa. The significant difference on both sides of the dry side in convective available potential energy is mainly caused by the difference in water condition of the lower layers in the drainage area of Huanghe and Huaihe Rivers of China. The hydrostatic instability (conditional instability) on both sides of the drylines is similar. Also, the vertical wind shear of 0-6 km is a little bit stronger on wet side than that on the dry side
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