During the first time phase, both users simultaneously transmit its information towards the relay (multiple-access phase), while in the second time phase relay broadcasts the received signal using AF protocol (broadcast phase).
In the first time slot (SB phase), the source node broadcasts one message to all destinations.
In the current study, for the first time, solid phase extraction combined with electro membrane extraction (SPE EME) was developed for ultra-preconcentration and determination of chlorophenoxy acid herbicides in environmental samples using capillary electrophoresis (CE).
In the current study, for the first time, solid phase extraction combined with solvent-based de-emulsification dispersive liquid liquid microextraction (SPE-SD-DLLME) was developed for preconcentration and trace detection of cadmium in water samples using flame atomic absorption spectrophotometry (FAAS).
In the first time slot or multiple access phase, S 1 and S 2 transmit their data symbols (x_{1}^{n}) and (x_{2}^{n}) on the n th subcarrier to the k th relay node simultaneously.
In the first time slot for multiple access phase, user S1 transmit data symbol x 1 ( n ) with power P s, 1 ( n ) on the n th subcarrier, while user S2 transmit x 2 ( n ) with power P s, 2 ( n ).
In the second time slot (phase II), and after proper processing, the RSs broadcast symbols from which the network nodes, that is, BSs and MSs, may extract their intended signals.
Node i transmits its packet to the destination in the first time slot during the first (direct transmission) phase, while node j listens.
Co/β-SiC catalysts have been prepared by slurry impregnation of cobalt nitrate and tested for the first time in slurry phase CSTR reactors at high water partial pressures (ca 10 bar).
Next in the second time slot (RB phase), the source node keeps quiet and the M1decoded destination nodes switch to relay mode and start to broadcast the decoded message, while the other M−M1destination nodes continue receiving, trying to collect the signal energy from all relay nodes.
