Soiling losses of photovoltaic (PV) panels due to dust lead a significant decrease in solar energy yield and result economic losses; this hence poses critical challenges the viability PV smart grid systems. In paper, these are quantified under Qatar’s harsh environment. This quantification is based on experimental data from long-term measurements various climatic parameters output power located...

Photovoltaic performance is significantly affected by soiling on its covering surface, which strongly influenced tilt angle. This raises concern for the potential investor, policymakers, engineers, and local populace in regions where rate threats remain relatively unexplored. study investigated effect of dust accumulation PV, considering influence angle using a low-cost in-house developed stati...

Aim: The aim of the study was to assess the success and efficiency of the training practices for acquisition of basic personal hygiene skills and behavior of hand washing and soiling in a relatively heterogeneous group of individuals receiving care from a drop-in day care/special education service. We also analyzed etiologies of the causes of discrepancies in learning behavior implying a need f...

Rectal methohexitone (25 mg X kg-1) was used to induce anaesthesia in 15 unpremedicated children scheduled to undergo bilateral myringotomies as outpatients. Induction time ranged from 4 to 11 minutes. In the recovery room, all children received a slow intravenous injection of physostigmine (60 micrograms X kg-1), or saline in a double blind randomized fashion. The use of physostigmine did not ...

The possible enhancement of the output from a partially shaded PV array by the use of AC modules has been determined for the PV facade at the University of Northumbria. The system currently has an annual shading loss of about 25% and the study has shown that the use of AC modules would increase the output by approximately 8%. The calculation method is described, and the implications for the des...