Swanson's law Swanson's law Swanson's law is the observation that the price of solar photovoltaic modules tends to drop 20 percent for every doubling of cumulative shipped volume. At present rates, costs halve about every 10 years. It is named after Richard Swanson, the founder of SunPower Corporation, a solar panel manufacturer. Swanson's law has been compared to Moore's law, which predicts the growing computing power of processors. Crystalline silicon photovoltaic cell prices have fallen from $76.67 per watt in 1977 to $0.36 per watt in 2014. Plotting the module price (in $/Wp) versus time shows a dropping by 10% per year.
River Town: Two Years on the Yangtze River Town: Two Years on the Yangtze River Town: Two Years on the Yangtze is a 2001 book by Peter Hessler. It documents his Peace Corps teaching assignment at Fuling Teachers College in Fuling, Sichuan, which started in 1996 and lasted for two years; Fuling is now part of Chongqing municipality. The book is a memoir of his experience in Fuling, told in first person. The language used is deliberately informal and aims to convey the beauty of the city and the poignancy of the stories. One of the features of the book is that most of its chapters can