Sodium-metal sulfide battery holds great promise for sustainable and cost-effective applications. Nevertheless, achieving high capacity and cycling stability remains a great challenge. Here, uniform yolk-shell iron sulfide-carbon nanospheres have been synthesized as cathode materials for the emerging sodium sulfide battery to achieve remarkable capacity of ∼ 545 mA h g(-1) over 100 cycles at 0....

For the mitigation of long-term pollution threats, one must consider that both the process of environmental degradation and the switchover to new and cleaner technologies are dynamic. We develop a model of a uniform good that can be produced by either a polluting technology or a clean one; the latter is more expensive and requires investment in capacity. We derive the socially optimal pollution...

In this paper, we find bounds and approximations for the capacity of mobile cellular communication networks based on Code Division Multiple Access (CDMA). We develop efficient analytic techniques for capacity calculations of CDMA cellular networks. Each cell is modeled as an independent M=G=1 queue and traffic capacity assessed based on the maximum Erlang traffic that leads to acceptable link q...

This paper analyzes the asymptotic capacity per receive antenna in a multiple input multiple output (MIMO) system with fading correlation at either the transmitter or the receiver. The objective is the derivation of a closed-form solution for the asymptotic capacity under fading correlation when the number of transmit and receive antennas increases without bound at the same rate. To do that, we...

System operators in the electricity industry are required to procure reserve capacity to deal with unanticipated outages, demand shocks, and transmission constraints. One traditional method of procuring reserves is through a separate capacity auction with two-part bids. We analyze an alternative scheme whereby reserves are procured through the energy market using only energy bids, and capacity ...

In this paper, we find bounds and approximations for the capacity of mobile cellular communication networks based on Code Division Multiple Access (CDMA). We develop efficient analytic techniques for capacity calculations of CDMA cellular networks. Each cell is modeled as an independent M=G=1 queue and traffic capacity assessed based on the maximum Erlang traffic that leads to acceptable link q...

Polyvinylchloride (PVC) based heterogeneous cation exchange membranes were prepared by the solution casting technique. The effect of super activated carbon nanoparticles concentration as filler additive in membrane matrix on ionic transfer behaviors of the membrane was studied. SOM images showed uniform particles distribution and relatively uniform surfaces for the membranes. The membrane water...

In a more realistic indoor environment we demonstrate the use of the ray tracing method to predict the capacity of a multiple input multiple output(MIMO) indoor wireless communication systems. The channel response for 4 by 4 MIMO systems located inside an office environment operating at 5.2 GHz is constructed by using Wireless InSite, ray tracing simulation tool. The uniform linear array(ULA) a...

We show how to compute or at least to estimate various capacity-related quantities for bosonic Gaussian channels. Among these are the coherent information, the entanglement-assisted classical capacity, the one-shot classical capacity, and a quantity involving the transpose operation, shown to be a general upper bound on the quantum capacity, even allowing for finite errors. All bounds are expli...