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The contamination of soil and water with heavy metals is one of the major environmental problems in the world. Oil and gas exploration and production activities contaminate the environment with heavy metals. In this study, heavy metal concentration was assessed in drilling waste discharges of different oil and gas wells at Khyber Pakhtunkhwa (KP), Pakistan. Moreover, the concentration of heavy metals...
The wireless medium is inherently a broadcast one: therefore multiple devices can access the same medium at the same time at overlapping frequencies. Multiple simultaneous transmissions in the same frequency area usually result in garbled data making communication impossible or inefficient. The MAC (medium access control) protocol's function is to moderate access to the shared medium by defining rules...
Measurements of the energy spectra of multiply charged positive and negative carbon ions (C n± ) recoiling from graphite surface under 100 and 150 keV argon and krypton ion bombardment are presented. With the energy spectrometer set at recoil angle of 79.5°, direct recoil (DR) peaks have been observed with singly as well as multiply charged carbon ions C n± , where n = 1...
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