Chang Sub Shin

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The isocurvature mode of dark matter is not damped away during kinetic decoupling from the thermal plasma. For weakly interaction massive particle as dark matter, the large density perturbation can generate the small scale ultra compact mini halos and the annihilation of dark matter inside them can give accessible signatures in the indirect detection of(More)
As the demand in industry and academia for ubiquitous and pervasive computing increases, Wireless Sensor Network (WSN) becomes a popular research pool for the last decades. In this paper, it is presented that the performance analysis of the Ad hoc On-demand Distance Vector (AODV) protocol over the IEEE 802.15.4 standard (ZigBee) Wireless Sensor network in(More)
This paper introduces a new IEEE standard, IEEE 802.15.5,which provides mesh capability for wireless personal area network (WPAN) devices. The standard provides an architectural framework enabling WPAN devices to promote interoperable, stable, and scalable wireless mesh topologies. It is composed of two parts: low-rate WPAN mesh and high-rate WPAN mesh. In(More)
The adiabatic perturbation of dark matter is damped during the kinetic decoupling due to the collision with a relativistic component on subhorizon scales. However, the isocurvature part is free from damping and could be large enough to make a substantial contribution to the formation of small scale structure. We explicitly study the weakly interacting(More)
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