This paper presents experimental studies on a solar-assisted ground coupled heat pump (SAGCHP) system for space heating. The system was installed at the Hebei Academy of Sciences in Shijiazhuang (lat. N38°03′, long. E114°26′), China. Solar collectors are in series connection with the...

Evidence from many countries shows that as societies modernise and women’s status rises, son preference declines. Yet in China the sex ratio at birth has been the highest in the world for over two decades despite rapid modernisation, urbanisation and huge improvements in women’s...