This thesis investigates the downlink resource allocation problem in Orthogonal Frequency Division Multiple Access (OFDMA) Heterogeneous Networks (HetNets) consisting of macro-cells and small-cells sharing the same frequency band. Dense deployment of small-cells overlaid by a macro layer is considered to be one of the most promising solutions for providing hotspot coverage in future 5G networks...

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Geothermal energy is a clean, green renewable resource, which can be utilized for power generation, heating, cooling, and could effectively replace oil, gas, and coal. In recent years, oil companies have put more efforts into exploiting and utilizing geothermal energy with advanced technologies for heat-tracing oil gathering and transportation, central heating, etc., which has not only reduced ...

deflection analysis of a simply supported microbeam subjected to a concentrated load at the middle is investigated on the basis of a shear deformable beam theory and non-classical theory. effects of shear deformation and small size are taken into consideration by hyperbolic shear deformable beam theory and modified strain gradient theory, respectively. the governing differential equations and c...

Resource quantification is vital in developing a tidal stream energy site but challenging high areas. Drone-based large-scale particle image velocimetry (LSPIV) may provide novel, low cost, risk approach that improves spatial coverage compared to ADCP methods. For the first time, this study quantifies performance of technique for resource assessment, using three sites. Videos sea surface were c...

in nigeria, most farming activities rely on family labor. however, rural-urban drift and the movement of young people away from agriculture are making labor increasingly pause. thus, labor has become a major constraint to expanding the scope of production by small-scale resource poor farmers. this paper provides an empirical relationship between labor and poverty using data from households. thr...