In this paper, we propose VANET Cross Link Corrected Routing (VCLCR), a simple yet novel, event-driven geographic routing protocol that removes cross links dynamically to avoid routing loops in urban Vehicular Ad Hoc Networks (VANETs). VCLCR uses the natural planar feature of urban maps without the problematic planarization strategy. The salient features of dynamic loop detection and statelessn...

Urban geodiversity is a complex entity that includes both natural and anthropogenic geological geomorphological elements, thus requiring broad interdisciplinary approach to its inventorying assessment. To estimate evaluate the widest possible range of urban geodiversity, explore intersection between geo- cultural heritage, an inventory 615 features city Pozna?, Poland, has been established. The...

‎Let $R$ be a commutative ring with non-zero identity. ‎We describe all $C_3$‎- ‎and $C_4$-free intersection graph of non-trivial ideals of $R$ as well as $C_n$-free intersection graph when $R$ is a reduced ring. ‎Also, ‎we shall describe all complete, ‎regular and $n$-claw-free intersection graphs. ‎Finally, ‎we shall prove that almost all Artin rings $R$ have Hamiltonian intersection graphs. ...

Modern millimeter-wave automotive radars are employed to keep a safe distance between vehicles and reduce the collision risk when driving. Meanwhile, an on-board radar module is supposed operate in line-of-sight condition, which limits its sensing capabilities intersections with obstructed visibility. Therefore, this paper investigates scheme passive reflector, enabling detect approaching vehic...

PM**£(*') f° r h£rS$2 where h ( < ^ ) is the point nearest to s* at which €(li)«<r(4j). If $(52)==<r(52), then let h~$%. For r<t2 let p(r) =p(^)+log log log fc — log log log r for Ui^r^h where #1 (<*2) is the point of intersection of y—p with y = p (£2) + log log log fe—log log log r. Let p(r)~p for r i^ rgwi . It is always possible to choose H SO large that r\<ti\. We repeat the procedure and ...

Article history: Received 14 November 2009 Received in revised form 29 April 2010 Accepted 6 May 2010

Given a simple generalized polygonA of line segments and arcs that is free to move and rotate and an oriented monotone chainB composed of smooth parametric curved edges, the positions and orientations forA to gouge-freely contactB (i.e., the contact configurations) is a C0 continuous surface in a three dimensional space R3. Past results either limitB to be polygonal or depend on the very compli...