Wide band gap thin-film kesterite solar cell based on non-toxic and earth-abundant materials might be a suitable candidate as top for tandem configuration in combination with crystalline silicon bottom cell. For this purpose parameters we have extracted from electrical optical characterization techniques of Cu2ZnGeSe4 absorbers cells, model has been developed to describe the efficiency limitati...

In this work, we describe the impact of aspect ratio ( $AR$ ) on performance optimally phased, identical flapping flippers in a tandem configuration. Three-dimensional simulations are performed for seven sets single and finite foils at moderate Reynolds number, with thrust producing, heave-to-pitch coupled kinematics. Increasing slenderness (or is found to improve coefficients augmentation but ...

Simulations are presented for flow around pairs of circular cylinders at a Reynolds number 3900. The is assumed to be two-dimensional and incompressible in nature the simulations performed using RANS (Reynolds Averaged Navier Stokes) approach with k-ε model. three different configurations cylinders: A tandem configuration where line joining centre parallel mean direction; side-by-side, perpendi...

This article introduces a new configuration of the doubly-fed induction generator (DFIG) based wind energy conversion system (WECS) employing only reduced-size rotor side converter (RSC) in tandem with supercapacitor. In proposed structure, grid (GSC) utilized conventional DFIG-based WECSs is successfully eliminated. accomplished by hydraulic transmission (HTS) as continuously variable and shaf...

typically, two configurations are used for energy harvesting, with different advantages: piezoelastic and piezomagnetoelastic. best performance of piezoelastic configuration is limited to its narrow bandwidth around the resonance frequency. if the excitation frequency slightly deviates from the resonance frequency, the power-out is severely reduced. to overcome this, the piezomagnetoelastic has...

Multi baselinc rcpeat track interferometry (RTI) can potentially be uscd to measure both velocities and the micro topogra hy of glaciers. The Danish Center for Remote (DPC) has established a test cite for studies of glacier dynamics on the Storstreimmen glacier i n North East Greenland. DCRS has acquired RTI data over the glacier in 1994 and 1995 and ERS-112 tandem mode data are also available....

Above-ground forest biomass is a significant variable in the terrestrial carbon budget, but is still estimated with relatively large uncertainty. Remote sensing methods can improve the characterization of the spatial distribution and estimation accuracy of biomass; in this respect, it is important to examine the potential offered by new sensors. To assess the contribution of the TanDEM-X missio...

The effect of alkyl substituents on the C-phenyl and/or the N-Phenyl ring of benzophenylhydroxamic acid on their molecular structure and hydrogen bonding has been investigated. The predominant configuration in CHCl3 is determined by steric and electronic effects. Substituents on the C-phenyl ring favor the cis configuration, while substituents in the N-phenyl ring favor a trans c...