Nucleon electromagnetic form factors are studied in the cloudy bag model with center-of-mass and recoil corrections. The center of mass motion is eliminated via several different momentum projection techniques and the results for these are compared. It is found that the shapes of these form factors are significantly improved with respect to data if the Lorentz contraction of the internal struct...

In a discrete form of the second quantization, the gauge independencies of all the physical states including vacuum in QED are restudied through a new approach. We also discuss an interesting phenomenon attributed to vacuum effect and come up with a procedure to produce general physical states. PACS: 03.65.Db, 12.70.Ds

dam spillways are the structures that lead rightly and safely the outflow downstream, so that the dam integrity can be guaranteed. many accidents with dams have been caused by an inadequate spillway design or insufficient capacity. to accurately respond the hydraulic spillways, designers use physical modeling for designing this kind of structures. the scale effect in the spillway modeling, as a...

abstract background: bruising is an unpleasant result of subcutaneous injection of enoxaparin, which causes physical discomfort, limitation of injection site, patient’s refusal of treatment, and distrust in nurses’ ability. the application of techniques which reduce patients’ fear, anxiety, and physical damage is one of the tasks of nurses. this clinical trial investigated the effect of duratio...

physical activity is connected with adults’ health in many ways, and walking is the most popular form of physical activity among adults all over the world. the authors have previously studied this issue in an under-construction environment in a new town in a developing country. the present study investigates the impact of built environmental features and qualities on walkability in developed ar...

In this paper, we have considered the problem of rotating, magnetohydrodynamic heat and mass transfer by free convective flow past an exponentially accelerated isothermal vertical plate in the presence of variable mass diffusion. While the temperature of the plate is constant, the concentration at the plate is considered to be a linear function with respect to time t. The plate is assumed to be...