745 research outputs found

    Repair Wind Field of Oil Spill Regional Using SAR Data

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    In this paper, we compared the normalized radar cross section (NRCS) of the synthetic aperture radar in the cases of oil spill and clean sea areas with image samples and determined their thresholds of the NRCS of SAR. we used the NRCS of clean water from the adjacent patches spill area to replace NRCS of oil spill area and retrieval wind field by CMOD5.N and comparison of wind velocity mending of oil spill with Model data the root mean square of wind speed and wind direction inversion are 0.89m/s and 20.26 satisfactory results, respectively. Therefore, after the occurrence not large scale oil spill, the real wind field could be restored by this method.&nbsp

    Pyrolytic and Kinetic Analysis of Two Coastal Plant Species: Artemisia annua and Chenopodium glaucum

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    The large amount of coastal plant species available makes them ideal candidates for energy production. In this study, thermogravimetric analysis was used to evaluate the fuel properties of two coastal plant species, and the distributed activation energy model (DAEM) was employed in kinetic analysis. The major mass loss due to devolatilization started at 154 and 162 degrees C at the heating rate of 10 degrees C min(-1) for Artemisia annua and Chenopodium glaucum, respectively. The results showed that the average activation energies of Artemisia annua and Chenopodium glaucum were 169.69 and 170.48 kJ mol(-1), respectively. Furthermore, the activation energy changed while the conversion rate increased, and the frequency factor k(0) decreased greatly while the activation energy decreased. The results also indicated that the devolatilization of the two coastal plant species underwent a set of first-order reactions and could be expressed by the DAEM. Additionally, a simplified mathematical model was proposed to facilitate the prediction of devolatilization curves.The large amount of coastal plant species available makes them ideal candidates for energy production. In this study, thermogravimetric analysis was used to evaluate the fuel properties of two coastal plant species, and the distributed activation energy model (DAEM) was employed in kinetic analysis. The major mass loss due to devolatilization started at 154 and 162 degrees C at the heating rate of 10 degrees C min(-1) for Artemisia annua and Chenopodium glaucum, respectively. The results showed that the average activation energies of Artemisia annua and Chenopodium glaucum were 169.69 and 170.48 kJ mol(-1), respectively. Furthermore, the activation energy changed while the conversion rate increased, and the frequency factor k(0) decreased greatly while the activation energy decreased. The results also indicated that the devolatilization of the two coastal plant species underwent a set of first-order reactions and could be expressed by the DAEM. Additionally, a simplified mathematical model was proposed to facilitate the prediction of devolatilization curves

    ICT: A Tool for sustainable Rural Development

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    ABSTRACT The major population of entire world lives in rural area and earns its live hood by agriculture and allied means. Rural area experiences hunger and poverty. The rural community is isolated from the world. They can't present themselves in front of the world. Development in 21 st century will determine to a large extent by the thought, action and imagination of people. Computers are reshaping human lives. In the rapidly changing scenario, the extensive use of computers advances in ICT making sustainable rural development possible. The paper introduces the role of ICT for rural development. The paper addresses the issues associated with rural community's isolation. ICT can reduce digital divide between urban and rural community. In order to alleviating poverty in rural areas, ICT can be used. ICT provides rural communities with existing possibilities for overcoming the disadvantages associated with countrymen's isolation and provides linkages upon opportunities for enhancements. The paper concludes that effective use of ICT can demolish geographical boundaries and can bring rural communities closer to globe. ICT in right direction can play a vital role for betterment of society and the rural community. There is a critical need to channel the vast potential of information technology to underprivileged. Categories and Subject Descriptors General Terms Human factors. Sociology. Miscellaneous

    The seismic attenuation structure of the East Pacific Rise

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    Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.Includes bibliographical references (p. 321-337).by William Sam Douglas Wilcock.Ph.D
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