analyzing the efficiency of agricultural productions plays an important role in raising their productions and performances without spending extra cost. in this studythis study evaluated were the interval evaluated e fficiency and no efficiency of interval for greenhouseof greenhouse cucumber producers somefor some subsectors of sistan region. this research was donethe study conducted on the bas...

Ship grounding is one of the primary maritime navigation casualties and a result of an error made by the navigating officer, of a technical failure on vital ship equipment or of force majeure. In order to decrease the risk of grounding in such cases, this paper explores the ship movement during navigation when an extraordinary event occurs, such as steering system failure that affects the vesse...

the purpose of this research was to analyzing the perception and technical knowledge of wheat farmers in shoushtar township, khouzestan province, iran regarding organic farming products. the research method employed was correlative-descriptive. the population consisted of wheat farmers in shoushtar township khuzestan province of iran. a random sample of wheat farmers (n = 163) was selected. the...

this paper is concerned with the estimation of total factor productivity (tfp) growth for the iranian electric utilities during the period 1980-1993 on the basis of panel data. a translog cost function is used which accommodates firm - specific variability through a one - way error component model. the results show that the iranian electricity supply industry experienced increasing returns to s...

this paper studies the technical efficiency of 12 branches of saman bank over the period 1387-88, relating it to the composition of staff by sex, the ratio of fixed assets to total assets, the age of the branches and the geographic ranking in development indicators of the city where the branch is located in. data envelopment analysis is used to determine the efficiency of branches. the average ...

In this paper, we consider a cooperative non-orthogonal multiple access (NOMA) aided underwater optical wireless system in which the source transmits to two users where near user serves as relay node far user. Our proposed consists of narrow-angle light-emitting diode (LED)/photodiode (PD) elements at source, user, and order achieve communication, our selects single LED/PD each node. We propose...