The VISTA Variables in the Via Lactea (VVV) survey and its extension, have been monitoring about 560 square degrees of sky centred on Galactic bulge inner disc for nearly a decade. photometric catalogue contains order 10$^9$ sources monitored K$_s$ band down to 18 mag over hundreds epochs from 2010-2019. Using these data we develop decision tree classifier identify microlensing events. As input...

The term geopolymer is a sustainable binder refers to the study of waste mate- rials containing silicon (Si) and aluminum (Al), which create an alternative formed by complex repeated chain geopolymerization process. Hellacious materials alternation mandatory see construction as beautiful infrastructure there are limited natural resources produce qual- ity concrete. Alternative aggregates create...

sarcheshmeh copper complex is the largest producer of copper in iran. with copper production, high amounts of so2 are being produced in this complex and emmited into the environment. so, in this study, the social optimum level of so2 released from this complex and the optimal tax rate will be evaluated. for this purpose, md and mac curves were estimated. the wtp for the reduction of so2 emissio...

introduction: asthma is a chronic inflammatory airway disease. genetic and environmental factors have been important role in the induction of asthma. it's estimated that asthma affect 2.7 to 35.4% of child (in average 13.4%) in iran. the aims of this study to assess the costs of asthma patients admitted in boali hospital in sari in the north of iran. patients and methods: this descriptive ...