We perform a systematic gradient expansion on kinetic equations and derive the CPviolating semiclassical force for fermions propagating in presence of a CP-violating wall at a first order electroweak phase transition. The force appears at order h̄ in the flow term of the kinetic equation and agrees with the semiclassical force used for baryogenesis computations. In particular we consider the for...

From first principles we develop figures of merit to determine the gain experienced by the guided mode and the lasing threshold for devices based on high-index-contrast waveguides. We show that as opposed to low-index-contrast systems, this quantity is not equivalent to the power confinement since in high-index-contrast structures the electric and magnetic field distributions cannot be related ...

The establishment of global helicopter linear model is very precious and useful for the design of the linear control laws, since it is never afforded in the published literatures. In the first principle approach, the mathematical model was developed using basic helicopter theory accounting for particular characteristic of the miniature helicopter. No formal system identification procedures are ...

AMANDA is a high-energy neutrino telescope presently under construction at the geographical South Pole. In the Antarctic summer 1995/96, an array of 80 optical modules (OMs) arranged on 4 strings (AMANDA-B4) was deployed at depths between 1.5 and 2 km. In this paper we describe the design and performance of the AMANDA-B4 prototype, based on data collected between February and November 1996. Mon...

Water splitting under the influence of solar light on semiconducting electrodes Im‐ mersed in aqueous electrolyte is a potentially clean and renewable source for hydrogen fuel production. Its efficiency depends on relative position of the band gap edges (the visible light interval between infrared and ultraviolet (UV) ranges of electromagnetic spectrum corresponds to gap widths 1.5–2.8 eV) acco...

some western scholars of shiite studies believe thatthe chief principle of justice in twelver shia islam or imamiyyah is rooted in mo’tazalediscourse while this principle has its roots in imam ali’s (as) theoretical and practical instructions. justice in imam ali’s view has an epistemological status which initiates from allah’s justice attribute; then it streams in cosmology; and after all it i...