5 research outputs found

    Probing the anisotropic expansion history of the universe with cosmic microwave background

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    We propose a simple technique to detect any anisotropic expansion stage in the history of the universe starting from the inflationary stage to the surface of last scattering from the CMBR data. We use the property that any anisotropic expansion in the universe would deform the shapes of the primordial density perturbations and this deformation can be detected in a shape analysis of superhorizon fluctuations in CMBR. Using this analysis we obtain the constraint on any previous anisotropic expansion of the universe to be less than about 35%.Comment: 16 pages, 11 figures (color online

    Ocena g臋sto艣ci tkania za pomoc膮 analizy obrazu

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    This paper deals with the efficiency evaluation of selected methods for automatic assessing of weaving density based on image analysis for different kinds of fabrics. A set of woven fabrics samples in plain, satin and twill weave and patterned fabrics were selected for assessing weave density. Images of samples were captured by a flat scanner followed by preprocessing for the enhancement of images. The methods selected included the gray line profile method, a method based on image decomposition with a Wiener and median filter, a method based on the co-occurrence matrix and one using the 2 dimensional discrete Fourier transform. The results show that any of these methods is suitable for all kinds of fabrics in general.Artyku艂 opisuje badanie efektywno艣ci wybranych metod do automatycznej oceny g臋sto艣ci tkania na podstawie analizy obrazu dla r贸偶nych rodzaj贸w tkanin. Ocen臋 g臋sto艣ci splotu przeprowadzono dla tkanin o splocie prostym, satynowym i sko艣nym oraz dla tkanin wzorzystych. Obrazy pr贸bek zosta艂y wykonane za pomoc膮 skanera p艂askiego. Badania przeprowadzono za pomoc膮 czterech r贸偶nych wyselekcjonowanych metod: metody liniowej profilowej, metody opartej na dekompozycji obrazu z zastosowaniem filtra Wienera i opartego na medianie, metody opartej na macierzy wsp贸艂wyst臋powania matrycy oraz metody wykorzystuj膮cej dwuwymiarow膮 dyskretn膮 transformat臋 Fouriera. Wyniki wskazuj膮, 偶e ka偶da z tych metod mo偶e zosta膰 zastosowana dla wszystkich rodzaj贸w tkanin

    Commissioning of a groundwater intake : law, theory and practice

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    The paper discusses some of the legal provisions governing commissioning of groundwater intakes. Well drilling and obtaining official approval of the exploitable resources report submitted, followed by obtaining a decision on environmental conditions and finally a permit for execution of water facilities still does not guarantee the investor shall be granted the desired water exploitation permit in the requested quantities. Therefore, some local governments have added an additional layer of locally-binding procedural requirements on top of the broader regulations in force, with safeguarding the interests of investors in mind. Situation of wells where water exploitation is of a seasonal nature (e.g. for agricultural irrigation) is somewhat peculiar as the issue is under-regulated. Seasonal water exploitation is not fully taken into account in the legal definitions of hydrogeological terms (e.g. exploitable resources of an intake), leading to errors in hydrogeological documentation. Such errors include those due to varied requirements of individual geological administration bodies, for example as concerns ways of determining the impact of intake operation
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