Abstract This paper surveys of the chemical composition copper alloy coinage in China from Qin Dynasty to end Yuan (221 BCE–1368 CE). It shows a dramatic change alloying practice used cast these coins unification (after 221 BCE), compared that practiced pre-Qin. There are number shifts quality dynasty dynasty, such as obvious debasement Southern Song (1127–1279 CE) when previous Northern (960–1...

We set out to determine factors that influence the rate of brain atrophy in 1-year longitudinal magnetic resonance imaging (MRI) data. With tensor-based morphometry (TBM), we mapped the 3-dimensional profile of progressive atrophy in 144 subjects with probable Alzheimer's disease (AD) (age: 76.5 +/- 7.4 years), 338 with amnestic mild cognitive impairment (MCI; 76.0 +/- 7.2), and 202 healthy con...

The accuracy of the results obtained using the surface source write/read feature of MCNP for toroidal fusion systems was assessed. Techniques that enhance the effectiveness of the surface source method were identified. Accurate results can be obtained for a specific component in a fusion system by either inserting the detailed component CAD geometry in the full model for the fusion system or ut...

BACKGROUND Ulnar collateral ligament (UCL) reconstruction of the elbow has become increasingly more frequent among elite overhead athletes. The purpose of this study was to conduct a systematic review comparing the clinical outcomes and biomechanical results of the Jobe, modified Jobe, docking, modified docking, Endobutton, and interference screw techniques for UCL reconstruction. HYPOTHESIS ...

As the transfer speed of land use rights accelerates, production efficiency farmer households keeps increasing as well. Based on field survey data 1368 in Shandong 2019, this paper applied average treatment effect (ATE) and propensity score matching (PSM) to investigate impact productivity households. The results indicate that has a positive overall labor participating transfer. an obvious asym...