The nearest individual method (NIM), Nearest neighbor method (NNM) and compound method (CM) are distance sampling methods that are being applied to measure the plant density (numbers of individuals per unit area). Density is one of the essential structural characteristics in forest stands and useful to understand the dynamics of the forest. The present study aimed to find the most adaptable dis...

this research has been taken among the students of high school in karaj city during the years 1391 and 1392. this is a survey research and data gathering is through questionnaires. studying the “an analysis of students’ tendency toward non-native reference groups in karaj”. the questionnaire was distributed among 260 of these students who were chosen through multi step cluster sampling. conside...

Eocene volcanic rocks in NE of Ordib, have a very good exposures near and along the Turkmeni-Ordib fault. These rocks, that are situated in the inner part of the Central Iran and margin of the Yazd block, comprise trachyte, trachy-andesite and basaltic trachy-andesite. Trachy-andesite is the pervasive rock unit. Rock forming minerals of these rocks are chloritized olivine, plagioclase, pyroxene...

abstract the aim of this study was threefold: (1) to investigate the relationship between knowledge of semantic prosody and efl learners general language proficiency; (2) to examine the relationship between qualitative as well as quantitative knowledge of words, and (3) to compare the performance of efl learner on receptive and productive measures of semantic prosody. the study is based on a...

In this paper, free vibration of carbon nanotube-reinforced functionally graded circular plates with hole has been investigated. Distribution of carbon nanotubes are continuous and the gradual and graded changes of materials through the plate thickness are considered as volume fraction. Considering the linear and non-linear variation of circular plates through the radial direction and also c...