We survey the recent progress in the design of approximation schemes for geometric variants of the following classical optimization problem: for a given undirected weighted graph, find its minimum-cost subgraph that satisfies a priori given multi-connectivity requirements. We present the approximation schemes for various geometric minimum-cost k-connectivity problems and for geometric survivabi...

1389-1286/$ see front matter 2011 Elsevier B.V doi:10.1016/j.comnet.2011.07.007 ⇑ Corresponding author at: London Center for Nan Street 17-19, WC1H 0AH, London, UK. Tel.: +44 798 E-mail address: [email protected] (D. N In order to increase the link capacity in telecommunication networks the bandwidth of multiple channels can be aggregated by transmitting on them simultaneously. The late...

Key management plays fundamental role in research on security service in wireless sensor networks (WSNs). However, due to the resource constraints, establishing pairwise keys in WSNs is not a trivial tasks. Several exiting key management schemes have been proposed in literature to establish pairwise keys between sensor nodes, but they either can not offer strong resilience against node capture ...

Cable tension force is one of the most important structural parameters to monitor in cable-stayed bridges. For example, cable tension needs to be monitored during construction and maintenance to ensure the bridge is not overloaded. To economically monitor tension forces, this study proposes the use of an automated wireless tension force estimation system (WFTES) developed solely for cable force...

an interface part is used between clutch pedal and clutch cable in peugeot, samand, rd and peugeot pars. this part is consisted of two pieces. the main body is made of polyamide 6.6 and the second part is made of ck45.due to the fact that the two pieces are made of different assembling geometry with respect to each other, therefore, has caused performance problems which may result in clutch cab...

Dynamic Analysis of an axially moving cable with time dependent tension and velocity isstudied in this paper. Tension force and the moving speed are assumed to be harmonic.It is found that there exists a specific value of speed in which natural frequency of the system approacheszero. This specific speed for such a critical condition is called critical speed and it will be proved thatincreasing ...

Design optimization of cable-stayed bridges is a challenging optimization problem because a large number of variables is usually involved in the optimization process. For these structures the design variables are cross-sectional areas of the cables. In this study, an efficient metaheuristic algorithm namely, momentum search algorithm (MSA) is used to optimize the design of cable-stayed bridges....

Power cable is widely used in Extra High Voltage (EHV), High Voltage (HV) transmission, Medium Voltage (MV) sub-transmission, and MV / Low Voltage (LV) distribution applications. Basically, the protection principles used for cable are similar with the ones for overhead transmission line. However, the inherent characteristics of cables make its fault behavior more complicate than that of transmi...

Wireless smart sensors (WSS) equipped with on-board computation and wireless communication capabilities are expected to provide rich information for structural health monitoring (SHM). While a large number of researchers have been contributing their efforts toward the realization of wireless smart sensor networks (WSSN), full-fledged implementation of WSSN for SHM has not yet been materialized....

This paper deals with the kinetostatic model for a planar point mass cable-driven parallel manipulator when the cable elasticity and configuration have been fully taken into account. An exact model solution for the statics is obtained by consider elastic hefty cables. The proposed formulation allows considering specific behavior of cables for large dimensions cable-suspended robots in which the...