eco village design is a new field of knowledge still under development. it will be the physical manifestation of the unfolding of the ecovillage dream held by so many. it is generally agreed that concept of sustainability should play an increasing role in future urban development world-wide. in order to ensure ecological sustainability, cities around the world have to decrease their environment...

The binary and ternary codes spanned by the rows of the point by block incidence matrices of some 2-designs and their complementary and orthogonal designs are studied. A new method is also introduced to study optimal codes.

Pipe systems are often used to transfer moderate to medium water volumes between reservoirs or from well fields to consumers. Such systems consisting of an arbitrary number of reservoirs or other types of sources and sinks are considered here. The Lagrangean optimization principle is used for the determination of all pipe diameters giving minimum total cost of the system, when the individual di...

سخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره هفدهم، مهر 1397، 595-596   طراحی مطالعه مداخله‌ای Interventional Study Design محسن رضائیان[1]،[2] M. Rezaeian   برای اندازه‌گیری کارآیی یک دارو، واکسن، برنامه‌ی بهداشت عمومی و یا هر متغیر دیگری از این دست، مطالعات مداخله‌ای (Interventional Studies) بهترین گزینه هستند. در مطالعات مداخله‌ای که از آنها ممکن است به مطالعات تجربی (E...

a mathematical method for calculation of the minimum cross-sectional area of a thickener is presented by obtaining minimum laboratory batch settling test data, a function, which is called settling function, is derived. this function is found to be in the form of a polynomial of third order. the settling function and mass flux relation are used for the design of thickener. the method predicts th...