摘要：The thermal properties of different clay samples obtained from locations in Akwa Ibom State, Nigeria were investigated and compared, and in order to establish their suitability as building material from energy conservation point of view. The results showed that stoneware clay has the highest solar radiation absorptivity of 22 32 m -1 while kaolin clay has the lowest radiation absoptivity of 14 46 m -1 A model for the prediction of temperature variation with thickness of the samples was developed. Results showed that kaolin would make the best choice for the design of a naturally cooled building.

摘要：This study investigated the potential utility of poly (sodium N-undecanoyl-L-leucyl-valinate) (poly-L-SULV), poly (sodium N-undecanoyl-L-leucyl-alanate) (poly-L-SULA), and poly (sodium N-undecanoyl-glycinate) (poly-SUG) molecular micelles (MMs) as chelators for heavy metal (Cd, Cr, Cu, Co, and Ni) ion remediation of kaolinite clay using D-optimum experimental design. D-optimum experimental design was employed to simultaneously investigate the influence of design variables such as the buffer pH, chelator concentration, and centrifuge speed to evaluate the optimum conditions and to reduce the time and cost of metal ion remediation. The partition coefficients of the metal ion concentrations between the kaolinite clay and chelator equilibrium were also evaluated. In addition, the influence of metal ion concentrations on the remediation capability of the chelators was evaluated by conducting remediation studies at four different (10 ppm, 40 ppm, 60 ppm, and 80 ppm) metal ion concentrations. In general, the results of the remediation efficiency and partition coefficients obtained in this study are highly metal ion dependent and also dependent upon the chelator used for the remediation. Specifically, the remediation efficiency of the molecular micelles was found to be comparable to or better than the corresponding remediation efficiency obtained when SDS or EDTA was used for the remediation. However, at optimum conditions, poly-SULV and poly-L-SULA molecular micelle chelators demonstrated superior remediation efficiencies for Cr, with remediation efficiency of 99.9 ± 8.7% and 99.1 ± 0.7%, respectively.

摘要：Keying of lithium chloride alkali halide salt into the interlamellar space of nacrite clay mineral leads to a stable hybrid material that after calcination under inert atmosphere at 723 - 873 K induces an amorphous metahybrid. The electrochemical impedance spectroscopy (EIS) was performed to investigate the electric/dielectric properties of the hybrid with various parameters: frequency and temperature. Equivalent circuit was proposed to fit the EIS data. The experiment results show that the ionic conduction mechanism is related to the motion of Li+ cations which are thermally activated, named the hopping model. Furthermore, the resulting metahybrid obtained from dehydroxylation of the formal hybrid shows a superionic behavior with high ionic conductivity up to 10﹣2 S·m﹣1, good electrochemical stability and can be used as a solid electrolyte material for Li-ion batteries.

摘要：比利时放射性核废料地质备选场址Boom clay是一种典型的横观各向同性材料,在Drucker-Prager帽盖模型的基础上,构建了适用于Boom clay的横观各向同性特点的热-水-力耦合弹塑性本构模型,该模型可反映温度对其强度、弹性模量、渗透性等的影响,并在ABAQUS中进行了二次开发。为验证所建立模型的合理性,结合比利时HADES地下实验室ATLAS Ⅲ现场加热试验结果,应用所提出的模型对加热过程中围岩的温度和孔隙水压力的变化规律进行了数值仿真分析。结果表明:所建立的模型能够正确地描述现场加热试验过程中围岩温度场和孔压场所呈现出的各向异性特征,主要表现为热源水平面内测点的孔压在加热功率升高时先略为下降后才升高,在加热功率下降时先略为升高后才下降,而竖直面内测点的孔压在加热功率升高时立即升高,在加热功率下降时立即下降。研究成果表明,考虑各向异性的THM耦合分析能更好地反映加热过程中泥岩温度场和孔压场的实际分布情况,研究结果对类似工程或现场试验的设计、安全运行提供重要的决策依据。

摘要：艺术家Jason clay Lewis的首次个展日前在纽约31Grand美术馆举行。展览中最主要的装置作品是《黑色死亡》（The Black Death,2003)。这件综合媒介作品暗示着过去，现在以及未来可能发生的圣战，而那个铠甲铮亮的骑士则是经书上的预言和世界末日善恶决战的恐怖威胁的象征物。