Mohamed Fadel

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The Taylor spatial frame uses the slow correction principles of the Ilizarov system but adds a six-axis deformity analysis incorporated within a computer program. To evaluate its use in our community, we used it in lengthening and deformity correction of the lower limbs to treat 22 cases from 1999 to 2001. There were 14 females and eight males (average age(More)
A wireless communication scenario is considered with <i>K</i> single-antenna source-destination pairs communicating through several half-duplex amplify-and-forward MIMO relays where each source is targeting only one destination. The relay beamforming matrices are designed in order to minimize the total power transmitted from the relays subject to quality of(More)
We consider a wireless communication scenario with K source-destination pairs communicating through several half-duplex amplify-and-forward relays. We design the relay beamforming matrices by minimizing the total power transmitted from all the relays subject to quality of service constraints on the received signal to interference-plus-noise ratio at each(More)
Between December 1993 and 1999 we treated 34 open tibial diaphyseal fractures. Thirty patients were available for evaluation with a mean follow-up after fracture union of 40.5 (24–80) months. Patient average age was 33.1 (15–71) years. Two fractures were grade I, 16 grade II, six grade IIIA, five grade IIIB and one grade IIIC. The wound was debrided and the(More)
The purpose of this study was to evaluate the outcome of Ilizarov external fixation (IE) versus dynamic compression plate (PO) in the management of extra-articular distal tibial fractures. Between 2010 and 2011, extra-articular distal tibial fractures in 40 consecutive patients met the inclusion criteria. They were classified according to AO classification(More)
BACKGROUND Hip distraction in Legg-Calvé-Perthes disease unloads the joint, which negates the harmful effect of the stresses on the articular surface, which may promote the sound healing of the areas of necrosis. METHODS Nonarticulated arthrodiastasis without soft tissue release using an Ilizarov external fixator was applied to 29 patients with(More)
The degrees of freedom (DoF) of the MIMO broadcast channel under various conditions remains an important open problem. This paper makes contributions towards completing the picture of the DoF of broadcast channels in the absence of CSIT (Channel State Information at Transmitter). First, the DoF of the quasi-static coherent broadcast channel (with CSIR) is(More)
In practical multiuser wireless networks, different links often experience unequal coherence lengths due to differences in mobility as well as scattering environment, a common scenario that has largely been neglected in the fundamental studies of the wireless channel. A key feature of unequal coherence lengths is that the per-transmission cost of acquiring(More)
Individual links in a wireless network may experience unequal fading coherence times due to differences in mobility or scattering environment. This paper studies broadcast and multiple access channels whose nodes experience unequal fading block lengths. Channel state information (CSI) is not available at the transmitters, and the cost of acquiring CSI at(More)