abstract long-term historical weather data are needed to conduct crop simulation analysis. simulated climatic data may be used when long series of historic data are not available or convenient or when future data are needed. the aim of this study was to generate daily weather values for maximum and minimum air temperatures. a number of weather generators are compared here. data from ten station...

in this research the daily data of 69 climatic variables (wind direction, wind speed, dry temperature, wet temperature, maximum and minimum temperature, average daily temperature, precipitation, relative humidity, station level pressure, cloudiness, horizontal visibility, vapor pressure, …) of abumoosa synoptic station during the years 1362-1388 were studied. initially, a data base of variabl...

road accident severity may be influenced by a number of various systematic causal factors. the weather and road accidents have a close relationship with each other and a number of methods have been proposed for measuring the risk of a road accident with rainy, foggy, and snowy weather and high winds. recent studies indicate that road collision rates increase during precipitation. the weather wa...

While there is literature on excess winter mortality, there are few studies examining the evolution of its trend which may be changing in parallel with global warming. This study aimed to examine the trend in the excess mortality in winter as compared to summer among the older population in a sub-tropical city and to explore its association with extreme weather. We used a retrospective study ba...

the streets, take to swimming, take over, Old, Although this ,'tl)proach proves effective in parsing and in generation, there are two acute problems which still require solutions. First, due to the huge size of the phrasal lexicon, cspeciaIly when considering subtle meanings and idiosyncratic behavior of phrases, encoding of ]exical entries cannot be done manually. Thus, phrase acquisition must...

Global climate--like local weather--is ever changing, on all time scales, in response to natural variations. For this reason, projections of global warming, resulting from increasing levels of atmospheric greenhouse gases, need to be set in the context of what has happened in the past. A knowledge of what has changed, and when and where, provides insights into why past changes have occurred. Su...

In areas where fire regimes and forest structure have been dramatically altered, there is increasing concern that contemporary fires have the potential to set forests on a positive feedback trajectory with successive reburns, one in which extensive stand-replacing fire could promote more stand-replacing fire. Our study utilized an extensive set of field plots established following four fires th...

Climate restricts the range of infectious diseases, whereas weather affects the timing and intensity of outbreaks. Climate change scenarios project a change in the distribution of infectious diseases with warming and changes in outbreaks associated with weather extremes, such as flooding and droughts. The hypothesis of this article is that the ranges of several key diseases or their vectors are...

The paper describes the design, simulation and practical implementation of a PV system specifically designed for battery charging applications. A DC-DC synchronous Buck converter is digitally controlled by a dsPIC33F to extract the maximum power from the PV panel and feed it to the battery, according to the data received through the sensors. The system proves to be stable to rapid weather chang...

where x 1 and x 2 are functions of two species, respectively; h and k are harvesting terms standing for the harvests (see [1, 2]). Because of the effect of changing environment such as the weather, season, and food, the number of species population periodically varies with the time. The rate of change usually is not a constant. Motivated by this, we consider the periodic nonautonomous populatio...