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Obtaining clean water resources from the air is an important method to solve the water shortage problem in arid and semi-arid areas. Improving the efficiency of material water collection from the air remains a huge challenge that needs to be overcome. Inspired by natural creatures, a new combined mist dew collector is proposed. The collecting part of the system has a gradient structure with alternating convexity and endows it with different chemical wettability. Janus sponge will be used as the storage part and mechanically assembled together to form a fog/dew collection system. This combination approach can improve collection efficiency by adjusting the liquid behavior throughout the entire fog collection process, including nucleation of droplets during the capture process, high-speed transmission on conical channels, and separation and storage of droplets from Janus sponge. The synergistic effect of conical capture and sponge separation collection improves the efficiency of fog collection. Compared with traditional fog collection structures, our proposed collection system significantly improves the efficiency of fog collection. Meanwhile, our collection system can effectively collect dew under conventional subcooling conditions. The readily available low-cost raw materials, easy to assemble and disassemble, and easy to carry, our proposed fog/dew collection system combines fog and dew collection as a promising solution to alleviate freshwater shortages in many underdeveloped, arid, and island areas. [Display omitted] • Inspired by natural water gatherers, a new combined fog-dew collector is proposed. • Hump/groove mixed wettability conical needle has excellent performance in fog-collecting and droplet transfer. • The coupled structure of a conical hole and a conical needle delivers droplets quickly. • Dew collection on surfaces with hump/groove - hybrid wettability. [ABSTRACT FROM AUTHOR]

This paper presents the impact of the collected VAT on a company acting in the construction field in the current economic environmnet; the study is based on data provided by the company before and after applying the VAT collection system. The research reflects the VAT payable on State Budget three times: before its entry into the system, its activity during the application system and its situation in 2014 when the company can choose between staying in the system or getting out of it. The research method consisted in reviewing approaches made in the literature, articles and specialized studies in national and international journals. We followed a detailed approach of the effects generated by the VAT collection system among companies acting in the construction filed and we made a case study based on the activity of the construction companies before applying the system and their option to stay or exit the VAT collection system. [ABSTRACT FROM AUTHOR]

Methane production and concentration from six cells were investigated in two landfills in China. Long-term monitoring tests were conducted to evaluate the methane recovery efficiency of active wells. Results showed that the recovery efficiency of a wells distribution simulation method was 75.6% to 83.5%, which was much higher than 50.1% to 53.6% when considering the EPA method in the EST (Ecological Sludge Evapotranspiration Technology) cover structure. The recovery efficiency of methane in Cell 1-B in Yang Loo landfill varied from 50.1% to 53.6%, which was much higher than 32.5% to 41.2% in Cell 1 in Chen Gang landfill adopting the EPA method. The monitoring data and analytical results showed that Numerical Simulation of Gas Volume Method (NSGV) can perform a more comprehensive evaluation of methane recovery in landfill relative to EPA method, and cover system produced by EST technology was more efficient in restraining cracking and increasing the methane recovery efficiency. [ABSTRACT FROM AUTHOR]