Groundwater recovery simulation for determination of post-mining lake formation at the Sangan iron mine, Mashhad, Iran

A two-dimensional axisymetric finite element software SEEP/W was used to simulate the groundwater recovery process in wells entirely confined in an aquifer at Sangan iron mine in Iran. The simulation model predicted very well with the results obtained from both analytical method and field data for well recovery process. It was inferred from the results that the rate of groundwater recovery process is highest immediately after mine closure with no dewatering program. The paper presents a methodology for predicting how the natural groundwater regime can be established to its equilibrium conditions after mining operation has ceased

Signals in the Soil: An Introduction to Wireless Underground Communications

In this chapter, wireless underground (UG) communications are introduced. A detailed overview of WUC is given. A comprehensive review of research challenges in WUC is presented. The evolution of underground wireless is also discussed. Moreover, different component of UG communications is wireless. The WUC system architecture is explained with a detailed discussion of the anatomy of an underground mote. The examples of UG wireless communication systems are explored. Furthermore, the differences of UG wireless and over-the-air wireless are debated. Different types of wireless underground channel (e.g., In-Soil, Soil-to-Air, and Air-to-Soil) are reported as well

IEEE/ACM Transactions On Networking : Vol. 21, No. 5, October 2013

1. Synchronized CSMA contention: model, implementation, and evaluation. 2. Optimality conditions for coordinate-convex policies in CAC with nonlinear feasibility boundaries. 3. Dynamic right-sizing for power-proportional data centers. 4. On the efficiency of CSMA-CA Scheduling in wireless multihop networks. 5. Benefits of network coding for unicast application in disruption-tolerant networks. 6. Unveiling the incentives for content publishing in popular bittorrent portals. 7. Time-clustering-based place prediction for wireless subscribers. 8. A Resource management system for interference miltigation in enterprise OFDMA femtocells. 9. On the admission of dependent flows in powerful sensor networks. 10. Estimating instantaneous cache hit ratio using markov chain analysis. Et

Transient response of beams to correlated random excitation at the boundaries /

Manuscript completed Sept. 1979; published Dec. 1979."NRC FIN No. B5976.""NUREG/CR-1068."Includes bibliographical references.Mode of access: Internet