to simulate a new economical architecture for pem fuel cell and investigate the effectiveness of the introduced structure on the performance, computational fluid dynamics (cfd) code is used to solve the equations for a single domain of the cell namely: the flow field, the mass conservation, the energy conservation, the species transport, and the electric/ionic fields under the assumptions of st...

nowadays, efficient goods distribution in target markets is one of the most important challenges of marketing managers and goods producers. distribution of goods and services has a significant contribution in gross domestic product (gdp) of countries. so an efficient distribution network can support constant economic development of countries and reduces end-user price of products. identifying a...

due to the importance of technological development in agriculture, it is necessary to increase intention of technology using and so its adoption among farmers. the aim of this study was investigating influence factorson farmers' intention in using modern channels. research population was all farmers covered of feyzabad networks water supply in fars province (192 farmers). samples of 127 fa...

Polar codes, that have been recently introduced by Arikan, are one of the first codes that achieved the capacity for vast numerous channels and they also have low complexity in symmetric memoryless channels. Polar codes are constructed based on a phenomenon called channel polarization. This paper discusses relay channel polarization in order to achieve the capacity and show that if inputs of tw...

In 2013, Senegal piloted an innovative combination model, where multiple channels for continuous distribution of long-lasting insecticide-treated nets were introduced and tested at the same time. From February to August 2013, health facilities, communitybased organizations and schools in the regions of Louga and Ziguinchor distributed 102,869 nets using both free and subsidized mechanisms. The ...

In 2013, Senegal piloted an innovative combination model, where multiple channels for continuous distribution of long-lasting insecticide-treated nets were introduced and tested at the same time. From February to August 2013, health facilities, communitybased organizations and schools in the regions of Louga and Ziguinchor distributed 102,869 nets using both free and subsidized mechanisms. The ...

Type of packings and characteristics of their geometry can affect the flow behavior in the reactive distillation columns. KATAPAK SP is one the newest modular catalytic structured packings (MCSP) that has been used in the reactive distillation columns, recently. However, there is not any study on the hydrodynamics of this packing by using computational fluid dynamics. In the present work, a 3D ...