The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Recording holographic gratings in different recording materials and applying these holograms to design a holographic fingerprint sensor. The sensor uses a laser as light source and consists of a glass plate with a plain grating-type hologram, and a focusing lens system under the hologram.
In the present work, effect of sintering temperature on structural, dielectric and electrical properties of vanadium substituted strontium bismuth niobate ferroelectric ceramics have been studied. Samples of composition SrBi2Nb1.9V0.1O9 were synthesized by solid-state reaction method at different sintering temperatures. X-ray diffraction analysis reveals the formation of perovskite structure. Peak...
In the present work, the polycrystalline sample of Ba5SmTi3Nb7O30, a member of tungsten bronze family, was prepared by solid-state reaction method and studied for their ferroelectric, pyroelectric and piezoelectric properties. X-ray diffraction (XRD) analysis reveals the formation of single-phase compound with an orthorhombic structure. The grain morphology of the sample has been investigated by scanning...
Samples of compositions SrBi2VxNb2−xO9, x = 0.0, 0.1, 0.3, 0.5 were prepared by solid-state reaction technique using high purity oxides/carbonates. The samples were calcined at 700°C and sintered at 900°C. XRD diffractograms show that a single phase layered perovskite structure is formed in all the samples. Effect of partial substitution of pentavalent niobium ion (0.68A°) by smaller pentavalent vanadium...
Samples of compositions SrBi2VxNb2??xO9, x = 0.0, 0.1, 0.3, 0.5 were prepared by solid-state reaction technique using high purity oxides/carbonates. The samples were calcined at 700??C and sintered at 900??C. XRD diffractograms show that a single phase layered perovskite structure is formed in all the samples. Effect of partial substitution of pentavalent niobium ion (0.68A??) by smaller pentavalent...
In this paper, a new parallel-connected single phase power factor correction (PFC) topology using flyback converter in parallel with forward converter is proposed to improve the input power factor with simultaneously output voltage regulation taking consideration of current harmonic norms. Paralleling of converter modules is a well-known technique that is often used in medium-power applications to...
The well known shift and similarity theorems for the Fourier transform generalise to two dimensions but new theorems come into existence in two dimensions. Simple theorems for rotation and shear distortion are examples. A theorem is presented which determines what the Fourier transform becomes when the function domain is subjected to an affine co-ordinate transformation. The full theorem contains...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.