1,880 research outputs found

    Film screening and discussion: Citizen Vaclav Havel Goes on Vacation

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    This is the archive of a film screening and discussion given by Jan Novak, author and filmmaker

    “Virtual libraries: service realities”

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    Zoning Control of Abortion Clinics

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    This note will address some of the issues involved when communities propose to use the zoning power to limit the exercise of the constitutionally protected abortion decision, focusing on abortion clinic regulations in Cleveland, Ohio, and comparing them to ordinances in three other cities

    Der Kapitalmarkt in der Tschechischen Republik

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    Series: Arbeitspapiere des Forschungsinstituts für mittel- und osteuropäisches Wirtschaftsrech

    Development of Urban Electric Bus Drivetrain

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    The development of the drivetrain for a new series of urban electric buses is presented in the paper. The traction and design properties of several drive variants are compared. The efficiency of the drive was tested using simulation calculations of the vehicle rides based on data from real bus lines in Prague. The results of the design work and simulation calculations are presented in the paper

    Evaluation of Effective Thermal Conductivities of Porous Textile Composites

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    An uncoupled multi-scale homogenization approach is used to estimate the effective thermal conductivities of plain weave C/C composites with a high degree of porosity. The geometrical complexity of the material system on individual scales is taken into account through the construction of a suitable representative volume element (RVE), a periodic unit cell, exploiting the information provided by the image analysis of a real composite system on every scale. Two different solution procedures are examined. The first one draws on the classical first order homogenization technique assuming steady state conditions and periodic distribution of the fluctuation part of the temperature field. The second approach is concerned with the solution of a transient flow problem. Although more complex, the latter approach allows for a detailed simulation of heat transfer in the porous system. Effective thermal conductivities of the laminate derived from both approaches through a consistent homogenization on individual scales are then compared with those obtained experimentally. A reasonably close agreement between individual results then promotes the use of the proposed multi-scale computational approach combined with the image analysis of real material systems.Comment: 17 pages, 7 figure

    Design and development of an on-line book store

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    In an era where world wide web is very developed and also users are demanding, it is important to stand out in the crowd of websites. With the increase of use of mobile devices it is important that websites are responsive and adaptive to different sizes of displays. Graphic design and content must also convince the user to re-visit. The thesis describes the current tools and techniques for quick prototyping, designing and developing fully responsive websites. The process is presented on a practical case of an online book store. The first part is the analysis of existing professional web services for online bookselling that have a large user base. In the following chapters the process of designing and developing a website is described. It is also written how to make a responsive website and how to make featured content

    Estimation of Soil Physico-chemical Properties by On-the-go Measurement of Soil Electrical Conductivity

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    For modern crop management practices, like precision farming, is crucial information about detailed spatial distribution of soil properties. A study was conducted to evaluate the on-the-go measurement of soil electrical conductivity for mapping of agronomical relevant soil properties. The experimental work was carried out on the eight fields of Rostenice a.s. farm enterprise, located in the South Moravia region of Czech Republic. The measurement of apparent electrical conductivity of soil was done by using CMD-1 and CMD-6L instruments (GF Instruments, Czech Republic) in 2013 (117 ha) and 2016 (359 ha). Soil properties were obtained by soil sampling in irregular grid with the density of 1 sample per 3 ha. Soil samples were taken from the depth of 30 cm and analyzed for soil texture (percentage of clay, silt and sand particles), content of available nutrients (P, K, Mg, Ca) and soil organic matter (SOM) content. The results of correlation analysis showed differences in main sensitivity of EMI to the soil properties across observed fields. Most frequent correlation was found in the percentage of clay particles smaller than 0.002 mm (r = 0.598). The correlation between EMI and nutrients content in soil and pH value was significant only for few fields. These results were obtained for individual fields, the aggregated evaluation showed lower relationships to EC. These outcomes showed, that rather than predictor of soil properties could be on-the-go measurement of soil EC used for identification of main zones within the fields at high spatial level

    Estimation of Soil Physico-chemical Properties by On-the-go Measurement of Soil Electrical Conductivity

    Get PDF
    For modern crop management practices, like precision farming, is crucial information about detailed spatial distribution of soil properties. A study was conducted to evaluate the on-the-go measurement of soil electrical conductivity for mapping of agronomical relevant soil properties. The experimental work was carried out on the eight fields of Rostenice a.s. farm enterprise, located in the South Moravia region of Czech Republic. The measurement of apparent electrical conductivity of soil was done by using CMD-1 and CMD-6L instruments (GF Instruments, Czech Republic) in 2013 (117 ha) and 2016 (359 ha). Soil properties were obtained by soil sampling in irregular grid with the density of 1 sample per 3 ha. Soil samples were taken from the depth of 30 cm and analyzed for soil texture (percentage of clay, silt and sand particles), content of available nutrients (P, K, Mg, Ca) and soil organic matter (SOM) content. The results of correlation analysis showed differences in main sensitivity of EMI to the soil properties across observed fields. Most frequent correlation was found in the percentage of clay particles smaller than 0.002 mm (r = 0.598). The correlation between EMI and nutrients content in soil and pH value was significant only for few fields. These results were obtained for individual fields, the aggregated evaluation showed lower relationships to EC. These outcomes showed, that rather than predictor of soil properties could be on-the-go measurement of soil EC used for identification of main zones within the fields at high spatial level
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