The rate of a network code is the ratio of the block sizes of the network’s messages and its edge codewords. The linear capacity of a network over a finite ring alphabet is the supremum of achievable rates using linear codes over the ring. We prove the following for directed acyclic networks: (i) For every finite field F and every finite ring R, there is some network whose linear capacity over ...

Drought stress is one of the most important factors limiting the survival and growth of plants in the different habitats of Iran. Detailed knowledge about the ecophysiological responses of native plants to drought stress could contribute to the success of breeding and re-vegetation programs. Six wild populations of Anthemis tinctoria, were assigned to four drought treatments, i.e. well...

in order to study the effects of drought stress and municipal compost on quantitive characteristics in peppermint , a green house experiment in a factorial based on a randomized complete block design with four replications was conducted in 2009 at university of zabol. treatments included: three irrigation levels %100 field capacity(control),%80 field capacity(mild stress) and %60 field capacity...

in order to identify low maintenance turfgrass, turf quality of selected entries of germination stage under drought stress were evaluated by digital image analysis methods in the field conditions. the first greenhouse study examined the interaction of four different levels of soil water contents (40, 60, 80 % and 100% field capacity) on 14 festuca arundinacea entries. we determined the effects ...

The water retention capacity of forest leaf litter was estimated through lysimeter measurements under field conditions. Six lysimeters were placed in Pinus koraiensis and Quercus acutissima forests filled with the surrounding to represent effects type on capacity. Two years for rainfall weight have been conducted all at 30 min intervals. Field showed that P. stored more during periods than did ...