evaporative cooling system and high air velocity management are important tools in alleviating the effects of heat stress on broilers performance during hot weather. in this study, technical and economical aspects of ventilation in varamin township broiler farms during summer were investigated. data were obtained from completed questionnaires through 20 broiler houses. information of air veloci...

background: longer survival after the total repair of the tetralogy of fallot increases the importance of late complications such as right ventricular dysfunction. this is a prospective study of the right ventricular function in totally corrected tetralogy of fallot patients versus healthy children. methods: thirty-two healthy children were prospectively compared with 30 totally corrected tetra...

Since the laws of physics are essentially based on our feeling of the real word , it seems natural to consider the problem of the space dimcnsionnality. The usualconception of the space follows from the vision and leads to the conviction that dimensionality of the real word is 3; a similar approach hut using the ears is done in this work. An acoustical source emits an impulse in an homogeneous ...

I consider the calculation of the two and three-point functions for QED at finite temperature in the presence of a background plasma velocity. The final expressions are consistent with Lorentz invariance, gauge invariance and current conservation, pointing to a straightforward generalization of the hard thermal loop formalism to this physical situation. I also give the resulting expression for ...

Non-relativistic de Broglie-Bohm theory describes particles moving under the guidance of the wave function. In deBroglie’s original formulation, the particle dynamics is given by a first-order differential equation. In Bohm’s reformulation, it is given by Newton’s law of motion with an extra potential that depends on the wave function—the quantum potential—together with a constraint on the poss...

Full simulations of homogeneous isotropic turbulence containing a homogeneous passive scalar were made at low Reynolds numbers and various Prandtl numbers. The results show that the spectral behavior of the two fields are quite similar; both fields decay as power-law functions of time. However. the decay exponent is quite dependent on both the Reynolds and Prandtl numbers. The decay exponent of...

The majority of nearby early-type galaxies contains detectable amounts of emission-line gas at their centers. The emission-line ratios and gas kinematics potentially form a valuable diagnostic of the nuclear activity and gravitational potential well. The observed central gas velocity dispersion often exceeds the stellar velocity dispersion. This could be due to either the gravitational potentia...

Bumpers play an important role in preventing the impact energy from being transferred to the automobile and passengers. Saving the impact energy in the bumper to be released in the environment reduces the damages of the automobile and passengers. The goal of this paper is to design a bumper with minimum weight by employing the Glass Material Thermoplastic (GMT) materials. This bumper either abs...

We study the Gross-Pitaevskii equation with a delta function potential, qδ0, where |q| is small and analyze the solutions for which the initial condition is a soliton with initial velocity v0. We show that up to time (|q|+ v 0)− 1 2 log(1/|q|) the bulk of the solution is a soliton evolving according the classical dynamics of a natural effective Hamiltonian, (ξ + q sech(x))/2.

Porto, the institutional repository of the Politecnico di Torino, is provided by the University Library and the IT-Services. The aim is to enable open access to all the world. Please share with us how this access benefits you. Your story matters. ABSTRACT The aim of this simulation study was to assess the bias in estimating muscle fiber conduction velocity (CV) from surface electromyographic (E...