Polarization-controlled directional scattering for nanoscopic position sensing

Directional Sensing Orients Cell Migration and Polarization

Cell migration is a complex process that requires the coordinated regulation of the cytoskeleton and cell adhesion. Actin polymerization at the cell cortex generates filaments that produce pseudopods and other membrane extensions that provide forward drive (34). In unstimulated Dictyostelium cells, pseudopods are formed at random positions independently of receptors and G proteins (FIGURE 1). T...

Eukaryotic chemotaxis: distinctions between directional sensing and polarization.

Directional sensing and polarization are fundamental cellular responses that play a central role in health and disease. In this review we define each process and evaluate a series of models previously proposed to explain these phenomena. New findings show that directional sensing by G protein-coupled receptors is localized at a discrete step in the signaling pathway downstream of G protein acti...

Polarization-controlled tunable directional coupling of surface plasmon polaritons.

Light can be coupled into propagating electromagnetic surface waves at a metal-dielectric interface known as surface plasmon polaritons (SPPs). This process has traditionally faced challenges in the polarization sensitivity of the coupling efficiency and in controlling the directionality of the SPPs. We designed and demonstrated plasmonic couplers that overcome these limits using polarization-s...

Position Sensing Wrists For

Distributed and Cooperative Compressive Sensing Recovery Algorithm for Wireless Sensor Networks with Bi-directional Incremental Topology

Recently, the problem of compressive sensing (CS) has attracted lots of attention in the area of signal processing. So, much of the research in this field is being carried out in this issue. One of the applications where CS could be used is wireless sensor networks (WSNs). The structure of WSNs consists of many low power wireless sensors. This requires that any improved algorithm for this appli...