Organized but dynamic

The nucleus: a highly organized but dynamic structure.

The nucleus in plants and animals is a highly structured organelle containing several well-defined subregions or suborganelles. These include the nucleolus, interphase chromosome territories and coiled bodies. We have visualized transcription sites in plants at both light- and electron-microscopy level by the incorporation of BrUTP. In the nucleolus many dispersed foci are revealed within the d...

Self-Organized Podosomes Are Dynamic Mechanosensors

Podosomes are self-organized, dynamic, actin-containing structures that adhere to the extracellular matrix via integrins [1-5]. Yet, it is not clear what regulates podosome dynamics and whether podosomes can function as direct mechanosensors, like focal adhesions [6-9]. We show here that myosin-II proteins form circular structures outside and at the podosome actin ring to regulate podosome dyna...

Self-Organized Criticality in a Dynamic Game∗

We investigate conditions under which self-organized criticality (SOC) arises in a version of a dynamic entry game. In the simplest version of the game, there is a single location — a pool — and one agent is exogenously dropped into the pool every period. Payoffs to entrants are positive as long as the number of agents in the pool is below a critical level. Exiting results in a permanent payoff...

A Well-organized Dynamic Bandwidth Allocation Algorithm for MANET

The anxiety made by users are mounting as the 'mobile ad hoc networks' became an essential part of this stage and call for the use of significant applications such as multimedia and videoconferencing. In this paper we introduce a new examine model with a dynamic stipulating architecture that provides bandwidth allocation dynamically based on its utility. Initially allocate the required bandwidt...

A Well-organized Dynamic Bandwidth Allocation Algorithm for MANET