This is the second of three papers on the geometric and combinatorial characterization of global Sturm attractors which consist of a single closed 3-ball. The underlying scalar PDE is parabolic, ut = uxx + f(x, u, ux) , on the unit interval 0 < x < 1 with Neumann boundary conditions. Equilibria are assumed to be hyperbolic. Geometrically, we study the resulting Thom-Smale dynamic complex with c...

This paper presents a printed dual band monopole antenna working below 250 MHz using meander line and an added stub. Meander approach is used to reduce the size of low frequency monopole. The proposed fed by microstrip on FR-4 substrate with overall 290 x 83 mm 2 . stub tuned operation at 114 221 measured reflection coefficient -19 dB both bands. has omni-directional characteristics efficiency ...

We present five X-ray quasars behind the Small Magellanic Cloud, increasing the number of known quasars behind the SMC by ∼40%. They were identified via follow-up spectroscopy of serendipitous sources from the Chandra X-ray Observatory matched with objects from the OGLE database. All quasars lie behind dense parts of the SMC, and could be very useful for proper motion studies. We analyze X-ray ...

The paper describes a visual method for the navigation of autonomous floor-cleaning robots. The method constructs a topological map with metrical information where place nodes are characterized by panoramic images and by particle clouds representing position estimates. Current image and position estimate of the robot are interrelated to landmark images and position estimates stored in the map n...