BACKGROUND Several retrospective studies have evaluated seasonal variations in the outcome of IVF treatment. Some also included weather conditions, mostly temperature and hours of daylight. The results were conflicting. METHODS In a retrospective study we analysed all fresh cycles (N = 9865) that were started between January 1, 2007 and December 31, 2012. Because some patients were included m...

The temporal and spatial characteristics of vegetation in the middle reaches Yangtze River (MRYR) were analyzed from 1999 to 2015 by trend analysis, co-integration partial correlation analysis using MODIS-NDVI time series remote sensing data. average NDVI MRYR increased 0.72 0.80, nearly two-thirds showed a significant improvement. At inter-annual scale, relationship between meteorological fact...

Most solar cookers usually perform a single task of solely cooking food during sunshine hours. Solar coupled with thermal energy storage (TES) material for off-sunshine are expensive and require complex engineering designs, cannot be used dual purposes, example, water heating cooking. In this paper, cooker that can tasks as well storing to periods is presented. The experimental setup composed p...

the present research analyzes air quality in ahvaz, a city in the south of iran, paying special attention to sulfur dioxide (so2). in order to prepare the average data in the city, measurements have been carried out between 2009 and 2010 in two different locations. relations between sulfur dioxide and some meteorological parameters have been calculated statistically, using the daily average dat...