From last few decades, piezoelectric materials have played a vital role as a mechanism of energy harvesting, as they have the tendency to absorb energy from the environment and transform return it to electrical energy that can be used to drive electronic devices directly or indirectly.The power of electronic circuits has been cut down to nano or mi
A tensile-strained GeSn/SiGeSn multiple quantum well (MQW) laser wrapped in Si3N4 liner stressor is designed and characterized theoretically.A biaxial tensile anal-lube strain is introduced into the GeSn/SiGeSn MQW laser by the Si3N4 liner stressor.The boosting effects of tensile strain on the threshold current density Jth and optical gain in GeSn/
Data envelopment analysis (DEA) is a powerful tool for evaluating the efficiency of decision-making units for ranking and comparison purposes and to differentiate efficient and inefficient units.Classic DEA models are ill-suited for the problems where decision-making units consist of multiple stages with intermediate products and those where inputs
This study investigates the emergence and supply-demand dynamics of a market for low-fee private schools (LFPS) at the level of early childhood care and education (ECCE) in a Aromatherapy Hand Wash slum of Lusaka, Zambia.Based on data collection over 1.5 years, the study reveals that, despite a government policy to support ECCE, over 90% of ECCE ce
Abstract Mineral drugs are an important constituent of traditional Chinese medicine (TCM).Taking minerals that contain heavy metals as drugs is a very national characteristic part of TCM.However, the safety and scientific nature of mineral drugs are controversial owing to their heavy metals and strong toxicity.In 2000, the Food and Drug Administrat