A post-wall waveguide-fed parallel-plate slot array antenna [1–3] has been proposed as a highgain, high-efficiency and mass producible planar antenna in millimeter-wave applications. The authors are developing post-wall waveguide slot arrays using a copper-clad dielectric substrate which reduces the cost of waveguides structures by printed circuit board (PCB) fabrication technique. The transmis...

High-purity copper is an attractive material for constructing ultra-low-background radiation measurement devices. Many lowbackground experiments using high-purity copper have indicated surface contamination emerges as the dominant background. Radon daughters plate out on exposed surfaces, leaving a residual Pb background that is difficult to avoid. Dust is also a problem; even under cleanroom c...

Heavy metal pollution is a prevalent threat in aquatic systems, particularly in coastal regions where coast-side industries or large tributaries carrying pollutants introduce these toxins into the environment, necessitating bioindicators such as sea urchins to ascertain the toxicity of contaminants in the environment. In this experiment, sea urchins were used to test the effects of copper and z...

Biefeld-Brown effect (B-B for short) refers to the phenomenon that when a high voltage is applied an asymmetric capacitor, capacitor generates additional force. In order explore influencing factors and series characteristics of B-B wire-plate capacitors in atmospheric pressure, set experimental devices with adjustable parameters was designed. Based on this device, effects different lengths, pow...

A synthesis strategy for the manufacture of inexpensive highly efficient nanostructured catalysts has been developed. The developed unique nonplatinoid copper-based with different surface morphology were investigated as a functional layer high activity in ethanol oxidation alkaline media. modifying controlled morphology, composition, and excellent electrocatalytic was synthesized by electrochem...

believed to be among the first, if not the very first, examples of copper-plate engraving which were produced in England, gives the book an importance from the standpoint of the annals of typography which can hardly be exaggerated. Published first in the year 1540, and dedicated to " the most gracious and in all goodnesse most excellent vertuous Lady Quene Katheryne," the work lived on till 167...