Migrating cells employ sophisticated signal transduction systems to respond to their environment and polarize towards attractant sources. Bacterial cells also regulate their polarity dynamically to reverse their direction of movement. In Myxococcus xanthus, a GTP-bound Ras-like G-protein, MglA, activates the motility machineries at the leading cell pole. Reversals are provoked by pole-to-pole s...

The ordinary quantum theory points out that general relativity is negligible for spatial distances up to the Planck scale lP = (h̄G/c 3)1/2 ∼ 10−33cm. Consistency in the foundations of the quantum theory requires a“soft” spacetime structure of the GR at essentially longer length. However, for some reasons this appears to be not enough. A new framework (“superrelativity”) for the desirable genera...

In asymmetric divisions, the mitotic spindle must align according to the cell polarity axis. This is achieved through targeting astral microtubules emanating from each spindle pole to opposite cell cortex compartments. Saccharomyces cerevisiae is a powerful genetic model for dissection of this complex process. Intense research in this yeast has rendered detailed models for a program linking act...

Because of extreme local saturation at pole tips of excited phase and uncircular shape of rotor and stator, a Swithed Reluctance Motor (SRM) does not have a simple and accurate mathematical model. Therefore, the output control of this motor requires a robust controller which is not based on an accurate model of the process. Fuzzy controllers, to some extent, will satisfy these requirements. Tet...

the efficiency of the institutions and the level of their effectiveness in trading among the countries are pretty new subjects that have been considered in recent studies. many researchers believe that the corruption would cause a reduction in trading among the countries. on the other hand some others assume corruption can help to facilitate the transactions process. the main purpose of this pa...