Lattice Wave Digital Filters, which are a Parallel Combination of Allpass Subfilters (PCAS), have attracted considerable attention in recent times, offering reduced complexity for given filter specifications compared to many other methods [1]. Recent VLSI implementations are based on the three port adaptor [2] with conventional 2's complement arithmetic, optimal for most practical situations [3...

Periodic noises are unwished and spurious signals that create repetitive pattern on images and decreased the visual quality. Firstly, this paper investigates various methods for reducing the effects of the periodic noise in digital images. Then an adaptive optimum notch filter is proposed. In the proposed method, the regions of noise frequencies are determined by analyzing the spectral of noisy...

This paper presents novel active filter for mitigation electromagnetic interference (EMI) and other adverse effects of pulse width modulation (PWM) inverter-fed AC motor system. An active filter proposed and devised for this system is characterized by sophisticated connection of two small separate filters, capable of mitigating all the adverse effects. This paper provides high frequency models ...

Studies were conducted on the effect of amino acids and growth regulators on the production of artemisinin, an antimalarial compound, in the callus of Artemisia absinthium. Callus was initiated on solid MS medium supplemented with BAP and NAA from leaf explant. For the production of artemisinin, the callus was proliferated on sterile filter paper bridge in MS medium supplemented with different ...

self-desiccation is the major source of autogenous shrinkage and crack formation in low water-binder ratio (w/b) concretes which can be reduced by internal curing. in this paper performance of high strength self consolidating concrete (hs-scc) with w/b of 0.28 and 0.33 including autogenous shrinkage, drying shrinkage, compressive strength, and resistance to freezing-thawing was investigated. th...