If you were driving down the road in Sweden at 04:50 on September 3, 1967, Swedish government required to stop. You then had move from left right side of road, and 05:00 could continue your way. Although invested heavily preparing for this pivotal 10 minutes, transition created some inevitable confusion (1). Nonetheless, a new equilibrium was fast. Traffic accidents insurance claims declined im...

Whistler mode chorus waves are quasi-coherent electromagnetic emissions with frequency chirping. Various models have been proposed to understand the chirping mechanism, which is a long-standing problem in space plasmas. Based on analysis of effective wave growth rate and electron phase dynamics self-consistent particle simulation, we propose phenomenological model called “Trap-Release-Amplify” ...

A new nanoparticle design may make cancer detection possible without the use of molecular markers of tumor cells. The star-shaped probe detected five different cancers in mouse models, according to a new study. By using nanostars to boost surface-enhanced resonance Raman scattering signals, the technique highlighted tumor margins, microscopic metastases, and even precancerous cells with high pr...

Local motion is known to produce strong illusory displacement in the perceived position of globally static objects. For example, if a dot-cloud or grating drifts to the left within a stationary aperture, the perceived position of the whole aperture will also be shifted to the left. Previously, we used a simple tracking task to demonstrate that active control over the global position of an objec...

Introduction: Cooperative communications [1] create diversity gains for network users with a single antenna. The classical cooperative scheme consists of two orthogonal time slots (TS): a broadcasting TS for a source (S) to transmit its signal to the intended destination (D), and a relaying TS for a relay (R) to retransmit S’s signal to D. There are amplify-and-forward (AF) and decode-and-forwa...

We propose an Adaptive AF protocol based on a new selection criterion, a function of the instantaneous capacities of all possible transmission schemes. Both outage probability and simulation results show that the Adaptive AF has better performance than the best known AF protocol (NAF) and solves the problem of the bad performance at low SNR.