Cleaning frequency of the solar PV power system plays a major role in energy harvesting. This paper proposed an optimized cleaning for plants. The objective is to maximize harvesting and increase financial profit. technique tested roof top grid connected 20 kW plant Cairo, Egypt. Experimental results are collected one year throw period from January 2021 December based on real time monitoring un...

A pneumatic oscillating Chinese wolfberry harvester was designed to improve the efficiency of manual harvesting and minimize fruit damage by mechanical harvesting. The shedding model under forces established based on kinetic analysis, flow field characteristics were investigated using computational fluid dynamics (CFD). position shape fan outlet determined comparing effects a linear reduction L...

Nacrtak The aim of this paper was the conjoint analysis of wood harvesting processes performed using motor-manual methods. Distribution of the characteristics consisted of nine features, based on the results of multidimensional scaling, which were aggregated into two groups: ergonomic (5) and technological (4). The scope of research was limited to four wood harvesting processes. The cuts were c...

The quantum dynamics of transport networks in the presence of noisy environments has recently received renewed attention with the discovery of long-lived coherences in different photosynthetic complexes. This experimental evidence has raised two fundamental questions: firstly, what are the mechanisms supporting long-lived coherences; and, secondly, how can we assess the possible functional role...

Olive has a notable importance in countries of Mediterranean basin and its profitability depends on several factors such as actual yield, production cost or product price. Actual "on year" Yield (AY) is production (kg tree-1) in "on years", and this research attempts to relate it with geometrical parameters of the tree canopy. Regression equation to forecast AY based on manual canopy volume was...

the aim of this study was to determine the most suitable shaking frequency and amplitude for shake harvesting lime fruit (c. aurantifolia). a tractor mounted limb shaker with adjustable shaking frequency and amplitude, powered by the tractor power-take-off shaft was designed and developed for this study. the rotating input power was transmitted to the shaker flywheel through a multiple sheave v...

Singlet-singlet annihilation experiments have been performed on trimeric and aggregated light-harvesting complex II (LHCII) using picosecond spectroscopy to study spatial equilibration times in LHCII preparations, complementing the large amount of data on spectral equilibration available in literature. The annihilation kinetics for trimers can well be described by a statistical approach, and an...

A light-harvesting complex composed of a π-stacked multichromophoric array in a DNA three-way junction is described. The modular design allows for a ready exchange of non-covalently attached energy acceptors.