Color Cherenkov imaging of clinical radiation therapy

Color vision is used throughout medicine to interpret the health and status of tissue. Ionizing radiation used in radiation therapy produces broadband white lig...     

手机会走向Linux吗?

近来,如果稍稍留意就会看到,Linux正日益迅速地被用作手机开发的平台,依托Linux进行手机应用的开发正方兴未艾。尽管现在已有不少国家把Linux作为开发重点,但中国却一直走在移动Linux应用开发的前沿。现在,整个亚洲和欧洲众多大公司已经确定要使Linux在手机市场占据一席之地。这将为中国主要的手机厂商带来更多重要商机。     

Features of a control blade degradation observed in situ during severe accident conditions in boiling water reactors

In the present paper, new results using in situ video are presented regarding boiling water reactor (BWR) control blade degradation up to 1750 K at the beginning of a nuclear severe accident. Energy-dispersive X-ray spectrometry (EDS) mapping indicated stratification of the absorber blade melt with formation of a chromium and boride-enriched layer. High-content-B- and C-containing material with increased melting temperature acted like a shielding and was found to prevent further relocation of control blade claddings. The interacted layers around the B₄C-granules prevented direct steam attack of residual B₄C. The results provide new insights for understanding of the absorber blade degradation mechanism under reducing conditions specific to Fukushima Dai-Ichi Unit 2 resulting from prolonged steam starvation.     

Shear analysis of rice husk ash (RHA) reinforced tin-0.7-copper composite solders on electroless nickel/immersion silver (ENIAg) surfaces

In this study, the mechanical performance of the rice husk ash-reinforced tin-0.7 copper composite solder was investigated. 0.01 wt.%, 0.05 wt.% and 0.1 wt.% of rice husk ash (RHA) were added to the solder matrix to prepare the composite solders. In order, to replace the costly electroless nickel immersion gold surface finish on the copper substrate, the effect of electroless nickel immersion silver (ENIAg) as the surface finish was studied. The differential scanning calorimetry (DSC) analysis showed that the composite solder exhibited lower melting temperature relative to the plain solder owing to the inclusion of rice husk ash. Shear strength analysis was carried out to investigate the influence of rice husk ash and electroless nickel immersion silver surface finish on the shear strength of the developed composite solders. The results proved that the rice husk ash failed to enhance the shear strength of tin-0.7 copper lead-free solder with the plain solder exhibiting the highest shear strength.     

Aspects of Topological Superconductivity in 2D Systems: Noncollinear Magnetism,Skyrmions, and Higher-order Topology

Journal of Superconductivity and Novel Magnetism - The review is aimed at highlighting the aspects of topological superconductivity in the absence of spin–orbit interaction in two-dimensional...     

Peculiarities of Short Fatigue Cracks Growth from a Blind Hole in Specimens Made of Steel 45. Part 1. Experimental Results

Strength of Materials - Results of in situ measurements of short fatigue cracks growth from a blind hole of diameter 0.6 and 1.6 mm in specimens from steel 45 during cyclic loading at different...     

Corrosion Protection of Carbon Steel by a Composition Based on Natural Polysaccharide

Materials Science - It is shown that xanthan gum inhibits corrosion processes in carbon steel placed in chloride-containing media by the mechanism of adsorption. Potassium-sodium tartrate improves...