scattering of an incoming wave train by a discontinuity at the upper surface of the ocean over a uniform porous bottom of finite depth is considered here in the framework of linearized water wave theory. by employing residue calculus method, the reflection and transmission coefficient are obtained. these coefficients are computed numerically for different values of the porosity parameter g and ...

in 2010- 2012 surveys, witches'- boom disease of tomato was observed in borazjan area (bushehr province, iran). agent of the disease was transmitted from tomato to tomato and eggplant by grafting and to madagascar periwinkle via dodder inoculation, inducing phytoplasma-type symptoms in inoculated plants. presence of phytoplasma in naturally affected tomatoes and all symptomatic graft and dodder...

conclusions the study showed that irs coverage and acceptance rates were relatively high, which is essential in reaching malaria elimination. the information on malaria transmission and knowledge prevention measures showed that householders were, to a certain extent, familiar with the malaria control activities conducted by the health care service. results a total of 834 households’ heads were ...

background the household transmission of hepatitis b virus (hbv) is a major health problem. the prevalence rate of this infection is reported about 11% to 57% among family members of hbsag carriers. objectives this study was conducted to evaluate serological determinants of chronic hepatitis b infection, especially hbsag positivity, among family members of asymptomatic hbsag positive carriers i...

in this paper two nodes to model isotropic and anisotropic media in transmission line matrix method (tlm) are presented. by using these two nodes, the permeability and permittivity of an anisotropic media can be modeled simultaneously. another application of these nodes is in modeling media with permittivity and permeability less than one. in the conventional 2 dimensional tlm, the stubs repres...

in 2011-2012 surveys for phytoplasma diseases, eggplant )solanum melongena l.( plants with phyllody symptoms were observed in eggplant fields of roodan (hormozgan province of iran). agent of roodan eggplant phyllody (rep) was transmitted from phyllody affected eggplant to eggplant and tomato by grafting and to periwinkle via dodder inoculation inducing phytoplasma-type symptoms. phytoplasmal in...