The experiments were carried out at the Regional Agricultural Research Station, Rahmatpur, Barisal during the rabi seasons of 2001-2002 and 2002-2003 to study the impact of different sulphur levels on bulb yield, storability and economic return of onion. Sulphur application had significant effect on yield components and bulb yield of onion. The highest bulb yields (19.75 and 19.88 t/ha) were ob...

environmental effects associated with pesticide application have motivated the development of integrated pest management programs throughout the world. advantages of the implementation of such a program like food security, biodiversity, consumer and producer security can be stated as economic value. estimating the economic value of such programs can be helpful in identifying the benefits as wel...

This study models a closed loop supply chain network for the Iranian engine oil market. The primary goal of created model is to summarize tactical choices like choosing best degree discount and allocating flow products across facilities as well strategic decisions selecting supplier finding new facilities. three aim functions reducing overall expenses, optimizing employment rate, limiting unrea...

Li, Zhigang, and Chen, Yu—Estimating the social return to transport infrastructure: A price-difference approach applied to a quasi-experiment Using the price differences between two markets, this study proposes a method for inferring the social return to transport infrastructure (in the vein of Fogel (1964)). We apply this approach to an investment that increased the shipping capacity of a thou...

a r t i c l e i n f o Keywords: Closed-loop supply chain Economic sustainability Environmental sustainability System dynamics Product design End of life returns We develop an end-to-end model of a closed-loop supply chain (CLSC), and identify the systemic decision making required for economic viability of participants in this chain. Economic viability is a key ingredient for environmentally sus...

The main task in oil and gas exploration is to gain an understanding of the distribution and nature of rocks and fluids in the subsurface. Well logs are records of petro-physical data acquired along a borehole, providing direct information about what is in the subsurface. The data collected by logging wells can have significant economic consequences, due to the costs inherent to drilling wells,...

Osmoregulation in Litopenaeus vannamei was studied in a factorial experiment at four temperatures (20, 24, 28 and 32 degrees C) and six salinities (10, 16, 22, 28, 34 and 40 per thousand). The isosmotic related points for 20, 24, 28, and 32 degrees C were 754, 711, 822, and 763 mmol/kg, respectively. This species hyperregulates between at salinities of 10 and 20 per thousand and hyporegulates b...

the aim of present article is determining economic value of air pollution and environmental effects of mashhad city air pollution. data of 286 households of mashhad was gathered through questionnaire in a survey reaserch using stratified random sampling method in year 2006. in order to detemine environmental effects of air pollution choice experiment approach - which gives the most perfect envi...

Background and Aim: Currently, cardiovascular diseases, including coronary heart disease, are one of the leading causes death in humans worldwide. In Eastern Mediterranean Middle East, our country, diseases major health social problems, size which is rapidly increasing. Due to growth medical technologies, population growth, lifestyle changes, studying consequences costs healthcare a critical is...