In contemplating mesh-based networking, some operators have expressed concern about the possible effects of span maintenance actions on network restorability, and hence availability. We consider this problem for span-restorable networks and provide two main advances. One is a bi-criteria optimization method that allows a controlled trade-off between the cost of spare capacity and the reduction ...

[1] The enhancement of infiltration capacity in the presence of vegetation is well documented in arid ecosystems where it can significantly impact the water balance and vegetation spatial organization. To begin progress toward developing a theory of vegetation‐infiltration interactions across a wide spectrum of climate regimes, three key questions are addressed: (1) Does vegetation also enhance...

In vivo studies have shown a major role for the alveolar macrophage in the killing of inhaled bacteria. This contrasted with earlier work which showed a preservation of phagocytic properties but a loss of bactericidal capacity when alveolar macrophages were studied in vitro. Recently, alveolar lining material (ALM) from rats has been shown to enhance the in vitro bactericidal capacity of alveol...

Numerous diversity techniques are used to minimize BER in wireless systems. But, the most effective diversity technique is Space Diversity. Space diversity is utilization of Multiple antenna systems (Multiple Input, Multiple Output MIMO), which gives a significant enhancement to data rate and channel capacity. Multiple antenna technology can also be used to increase the data rate (spatial multi...

In wireless adhoc networks, channel and energy capacities are scarce resources. In our previous work we proposed BLAM, a new energy aware MAC layer enhancement for the IEEE 802.11 protocol to save the energy and channel capacity wasted in collisions. In this paper we introduce a collision model to analytically compare BLAM to the IEEE 802.11. Using this model we provide worst-case and best-case...

This paper discusses the enhancement of the proposed UWB antenna design that can be used in wireless UWB systems. The small antenna design was simulated by CST software to present the performance of the main antenna parameters. The return loss is less than -10 dB from 3.5 GHz to 10.8 GHz which is covering the UWB bandwidth. This antenna was applied in multiple-in multiple-out (MIMO) scheme in i...

Cooperative communication or cooperative diversity, as it is sometimes called, is a relatively new technique aimed at improving the channel capacity of wireless networks, through the enhancement of transmit and spatial diversity. This is brought about by an exploitation of the antennas on wireless devices. A major benefit of this technique is that this gain in diversity is achieved without the ...

MIMO systems are used in wireless communications for enhancement of capacity. The number of transmit and receive antennas effect the tradeoff between performance gain and that of multiplexing gain. In this paper we are considering the study of Rayleigh fading affecting the capacity of MIMO channel by mat lab simulation. The Singular Value Decomposition (SVD) has been used to explore further ins...