The profitability of forging and stamping plants is directly related to the economical use raw materials. For sheet metal stamping, material losses can account for a significant proportion (up 20-40%), so reducing them even by few percent saves thousands tonnes metal. An indicator utilisation efficiency rationality cutting factor η, defined as ratio weight workpiece rate consumption its product...

Microwave loss in niobium metallic structures used for superconducting quantum circuits is limited by a native surface oxide layer formed over timescale of minutes when exposed to an ambient environment. In this work, we show that nitrogen plasma treatment forms nitride at the metal–air interface, which prevents such oxidation. X-ray photoelectron spectroscopy confirms doping more than 5 nm int...

The continuous annealing process line is effective in producing high quality cold-rolled metal strips. The process line operates at high speeds. At such speeds, the tension profile of the strip needs to be controlled in order to prevent faults such as strip breaking or slippage. But, tension cannot be measured continuously along the line as only a limited number of sensors can be placed. So it ...

We have obtained Hubble Space Telescope UV spectra of the white dwarf in GW Lib, the only known non-radially pulsating white dwarf in a cataclysmic variable, and the first known DAZQ variable. The UV light curve reveals large amplitude (10%) pulsations in the UV with the same periods (646, 376 and 237 s) as those seen at optical wavelengths, but the mean spectrum fits with an average white dwar...

For the deficiencies of traditional stress detection methods for steel strips in industrial production, this paper proposes a non-contact stress detection scheme based on the magnetoelastic effect. The theoretical model of the transmission-type stress detection is established, in which the output voltage and the tested stress obey a linear relation. Then, a stress detection device is built for ...

Finite element analysis (FEA) and continuum mechanics techniques have been used to model the thermal residual stress distribution in bonded joints and assess the suitability of using two-dimensional (2D) analysis methods. The methods are first employed to investigate stresses in metal-epoxy bi-material strip samples. The change in curvature of two bi-material strip systems during heating and co...

The aim of this study was to assess the effects of strip cropping and different weed control methods on the yield and yield structure of dent maize, narrow-leafed lupin and spring oat. A split-plot design with four replications was conducted in 2008-2010. The following factors were analysed in the experiment: I. Cultivation method – sole cropping and strip cropping; II. Weed control method ...