the padmakar-ivan (pi) index is a first-generation topological index (ti) based on sums overall edges between numbers of edges closer to one endpoint and numbers of edges closer to theother endpoint. edges at equal distances from the two endpoints are ignored. an analogousdefinition is valid for the wiener index w, with the difference that sums are replaced byproducts. a few other tis are discu...

the county of khorram-abad enjoys a high potential for ecotourism because of its mountains, forests, natural mineral springs, natural waterfalls and diversity in folks and cultures. but, un-planned and uncontrolled ecotourism can have negative effects on environment, economy, culture and even the security of eco-tourists. the main purpose of this study is to present a fuzzy multi-criteria decis...

introduction: fasting during ramadan is a religious obligation for healthy adult muslims. this study aimed to investigate the effects of ramadan fasting and physical activity on blood hematological and biochemical parameters in male and female subjects. methods: in this study, 50 healthy subjects were randomly assigned to four groups: male control fasting (mcf) group (n=13), male training fasti...

This study used quantifying factors affecting desertification based on the Iranian model of desertification potentialassessment (IMDPA) to assess the current status of desertification in Bordekhun region, Iran. Bordekhun region has anarea of 214.11 km2 and is located near the city of Daiyer in Boushehr province. First, a working unit map of the regionwas selected as the basic map for evaluation...

abstract: the subject of the life satisfaction is one of the important issues in development economics literature. in this paper, the main determinants of life satisfaction such as economic factors have been considered. for data analysis, the indices of life satisfaction have been collected among 400 people in tehran and neibouring provinces by applying stratified random sampling method. then, ...