This paper proposes a novel ultrawideband antenna with high gain and circular polarization.Its circular polarization can be easily changed to right-handed or left-handed.The antenna consists of four sophisticated antipodal Vivaldi antennas and an ultrawideband feeding network.The feeding network composes of four horizontal-to-vertical transitions,
This paper constructs the comprehensive index evaluation of population development from the three aspects of human development, population and economic society and population, resources and environment, according to the movement course and changing trend of population development at home and abroad, HEART CARE and the guiding ideology of national p
This paper reviews the synthesis methods of nano titania particles and their utilization in various applications with concise discussion on the related health concerns.Owing to the efficient photocatalytic properties of nano titania particles along with high stability, super hydrophilicity and low cost, these particles are perfect candidate for the
The morphology and distribution of volcanic edifices in volcanic terrains encodes the structure Board School Sign and evolution of underlying magma transport as well as surface processes that shape landforms.How magmatic construction and erosion interact on long timescales to sculpt these landscapes, however, remains poorly resolved.In the Cascades
A series of twenty substituted 2-hydroxy-3-[(2-aryloxyethyl)amino]propyl 4-[(alkoxycarbonyl)amino]benzoates were prepared and characterized.As similar compounds have been Green Hornet described as potential antimycobacterials, primary in vitro screening of the synthesized carbamates was also performed against two mycobacterial species.2-Hydroxy-3-[