the study of spatial and temporal changes in climate parameters, is one the most important issues in the world's climate research. study of changes in cloud cover as one of the most important climate parameters is important, because clouds are in top of hydrologic cycle and changes in them make changes in spatial and temporal variations in other climate parameters. in this study, the spati...

members of cyperacea family are among the common host species of rust fungi. to our knowledge, till now seven puccinia species have been recorded on cyperaceous plants in iran. of these, four species were known on carex. in present report, other rust species are reported on carex orbicularis subsp. kotschyana (boiss. & hohenacker) kukkonen. this report is based on infected specimen collected fr...

An abrupt global warming event has been recorded in many parts of the world in sediments of Latest Maastrichtian age between 65.45-65.10 Ma. This warm event was documented here at a section near Ziyarat-kola in Central Alborz based on analysis of planktonic foraminifera. An unusual abundance of normally large-size species such as Globotruncana arca, Globigerinelloides subcarinatus, Pseudoguembe...

In this paper, tone mapping operations based on the nonlinear Successive Mean Quantization Transform (SMQT) are proposed in order to convert high dynamic range images to low dynamic range images. A SMQTbased tone mapping applied on the luminance channel is derived as well as a SMQT-based method working directly on all RGB channels. Both methods are compared to other state-of-the-art methods and...

1Child Growth and Development Research Center, Pediatric Pulmonology Department, Research Institute of Primordial Prevention of NonCommunicable Disease, Isfahan University of Medical Sciences, Isfahan, IR Iran 2Imam Hassan Mojtaba Hospital, Alborz University of Medical Sciences, Karaj, IR Iran 3Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children’s Medical Center, T...

in order to have spatial and temporal analysis of iran extreme cold days' trend, the average of daily temperature data from 663 synoptic and climatologic stations of iran during the period of 1961/21/03 to 2004/19/03 were used. then, temperature data on 15*15 kilometer pixels were interpolated using kriging method for iran. the extreme cold days were identified by normalized temperature di...

The Manantial de las Queseras mire (40o 16′ 59.82″ N, 4o 55ʹ 15.28″ W; size c. 0.054 ha; 1295 m above sea level [a.s.l.]) lies on the southeastern slope of ‘Sierra Cabeza Aguda’ in easte...

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