We study algebraic properties of categories of Merotopic, Nearness, and Filter Algebras. We show that the category of filter torsion free abelian groups is an epireflective subcategory of the category of filter abelian groups. The forgetful functor from the category of filter rings to filter monoids is essentially algebraic and the forgetful functor from the category of filter groups to the cat...

A large-scale data dissemination application is characterized by a large number of information flows and information consumers. Consumers are interested in different, yet overlapping, subsets of the flows. Multicast is used to deliver subsets of the flows to subsets of the consumers. Since multicast groups are a limited resource, each consumer must filter out a large number of unneeded flows. W...

This paper presents a new design method for capacitor-loaded cross-coupled cavity filter, which significantly increases the power capacity of filter while improving out-of-band rejection. The uses coaxial resonator at open end donut capacitive-load. A triangular form structure is used full-cavity arrangement to reduce size filter. In order validate design, with center frequency 2.08 GHz and ban...

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...

For every filter F on N, we introduce and study corresponding uniform F-boundedness principles for locally convex topological vector spaces. These generalise the classical boundedness sequences of continuous linear maps by coinciding with these when equals Fréchet cofinite subsets N. We determine combinatorial properties which ensure that hold space. Furthermore, several types spaces, also isol...

Background: The appendix is considered as part of the gut-associated lymphoid tissue; however, lymphocyte subsets in this tissue are not fully defined. Objective: To investigate and compare the function and phenotype of lymphocyte subsets in peripheral blood and appendix of patients with normal and inflamed appendix tissues. Methods: Peripheral blood samples and appendiceal mononuclear cells we...

In this paper, we proposed a novel structure for designing all optical filter based on photonic crystal structure. In designing the proposed filter, we simply employed a point defect localized between input and output waveguides as wavelength selecting part of the filter. The initial form of this filter is capable of selecting optical waves at =1560 nm, the transmission efficiency of the filte...

odor emission is a common environmental problem in septic tank. the feasibility of using trickling filter to eliminate the malodorous gases from the septic tank was studied. a trickling filter is set up at the outlet of the waste gases of the septic tank, which was attached to the university's cafeteria. in this investigation, the trickling filter system was used, measuring the hydrogen sulfide...