In this paper the classical Rayleigh-Sommerfeld and Kirchhoff boundary-value diffraction integrals are solved in closed form for circular apertures and slits illuminated by normally incident plane waves. The mathematical expressions obtained involve no simplifying approximations and are free of singularities, except in the aperture plane itself. Their use for numerical computations was straight...

The successful realization of a project for slitting core laminations for power transformers under minimizing costs is presented. The production of the core of power transformers requires great amounts of grain oriented silicon steel (up to 200 tons for a single transformer). The shape of the cross section of the core is approximated to a circle by stacking sheets of diierent widths. To supply ...

In this research, the incremental slitting method was employed to determine throughthickness residual stress profile of a carbon/epoxy laminate. The method involves measuring strains at the back surface of the stressed specimen, while a narrow slit is cut by a CNC milling machine progressively from the top surface of the specimen. "Pulse Method" was selected as the computational approach for th...

SEVERAL years ago a description was published of a new technique in performing the three-snip operation to relieve epiphora due to stenosis of the lacrimal punctum (Graves, 1926). The method was to dilate the punctum, insert a small grooved director, place the back of a large Ziegler knife in the groove, and then, by pushing it inwards towards the nose, to incise the upper edge of the canalicul...

During nervous system development, commissural axons cross the midline despite the presence of repellant ligands. In Drosophila, commissural axons avoid premature responsiveness to the midline repellant Slit by expressing the endosomal sorting receptor Commissureless, which reduces surface expression of the Slit receptor Roundabout1 (Robo1). In this study, we describe a distinct mechanism to in...

Abstract Background Prior work described an approach for mapping the two-dimensional spatial distribution of biaxial residual stress in plate-like samples, combining multiple slitting measurements with elastic analysis. Objective This paper extends prior by applying a new variation method that uses cut mouth opening displacement (CMOD) rather than back-face strain (BFS). Methods First, CMOD is ...