BACKGROUND In recent years the generation rate of construction and demolition waste (C&D) has significantly augmented. The aim of this study was to assessed the quality and quantity of construction and demolition waste in Tehran (capital of Iran). METHODS Questionnaire methods were used for estimating the amount of generated C&D wastes national statistical data and typical waste generation da...

Given that Mandarin is a tone language and English is not, the present study investigated the perception of Mandarin tones in young school-aged children with or without tone language exposure. Mandarin Monolingual (MM), English-Mandarin Bilingual (EMB) and English Monolingual (EM) children aged 6 to 8 years participated in tone identification and discrimination tasks. Tone identification and di...

Background: More psychiatric visits, especially non-emergency ones, to emergency departments (EDs) of general hospitals have been observed in recent years. The aim of this study was to determine the characteristics of psychiatric visits to the ED of Rasoul-e-Akram Hospital, Tehran, Iran. Methods: In this cross-sectional study, during a two-month period, all psychiatric presentations and consult...

twenty five cases of minor saliva ry glands tumors which was observedat the department of pathology of university of tehran from 1967 to 1972 are presented and discussed . benign mixed tumor is the most common and the only benign lesion in this series of 75 patient with intraoral salivary gland tumor. there were eleven malignant type and hence about 44% of all the tumor arc malignant and it cor...

although there is relatively substantial literature about what management is, how it works and what functions are there, but the research findings about what the effective managers do and what features are entitled, is limited. in this context, this paper has extracted individual constructs of managers about managerial effectiveness to provide managerial effectiveness system from point of view ...