5 research outputs found
Historical Myths or Mythological History: A Fresh Approach to Understand the History of Assam
No full textThis paper carries out a critical review of the trends of historical writings in Assam. The historiographical study reveals that the beginning of the historical phase was, in fact, late in the North East region. Moreover, in many of these historical writings, the importance of the local histories of the communities of the region was ignored. The author highlights the fact that a pan-Indian history for the region may not be authentic enough to understand the cultural dynamics of the complex society of the Northeast. The author also focuses on corroborating ‘proper’ historical source material for reconstructing the history of the region rather than deriving inferences from mythology and legends. However, the importance of recent trends in historiography such as selective utilisation of oral traditions, folklores and memory studies has been emphasised. An alternative and more precise periodisation of the historical phase has been provided which does not, however, project any clear marker between periods and eras but emphasises on slow and steady transformations. Importance of archaeological sources and material evidence has been kept in mind while deriving periodical divisions. Relooking at the history of the Koches, Kacharis has been emphasised
Effect of Fe3O4‐Decorated N‐Doped Reduced Graphene Oxide Nanohybrid on the Anticorrosion Performance of Epoxy Composite Coating
No full textThe present study explores the synergistic effect of Fe3O4 and heteroatom doped reduced graphene oxide (rGO) nanohybrid on anti‐corrosion performance of epoxy composite coating. In this connection, Fe3O4 nanoparticles were decorated over nitrogen doped rGO (Fe3O4‐NRG) and characterized by Fourier transform infrared spectroscopy (FT‐IR), Raman spectroscopy, X‐ray diffraction (XRD), X‐ray Photoelectron spectroscopy (XPS), and Thermogravimetric analysis (TGA). This approach to modulating the surface properties of graphene and hence the interaction with polymer matrix were quite distinct from traditional surface functionlization or decoration in a sense that the doped nitrogen atom facilitate the growth of Fe3O4 particles and at the same time augmented the interaction of rGO with polymer matrix. The prepared nanohybrid was dispersed in epoxy matrix through mechanical mixing and coated over mild steel surface via spin coating technique. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) study revealed superior anti‐corrosion performance of Fe3O4‐NRG/epoxy coating in 3.5 wt% NaCl solution. The corrosion inhibition was found to improve by ∼ 98.5% with 0.5 wt% loading of Fe3O4‐NRG. We believe that this simple solvent free approach to prepare composite coating can be exploit for practical application and thus deserves special attention.
Unusual premonsoon eddy and Kelvin wave activities in the Bay of Bengal during Indian Summer monsoon deficit in June 2009 and 2012
No full textAn investigation of the eddy and coastal Kelvin wave activities in the Bay of Bengal (BoB) is carried out during premonsoon season in two years of Indian summer monsoon deficit in June (2009 and 2012), occurred in the recent warming hiatus period. Using altimeter observations, our study reveals that over the northern BoB cyclonic eddy kinetic energy is reduced by 35% and 50% from the climatology during premonsoon seasons in 2009 and 2012, respectively, while the cyclonic eddy area is reduced by 18% and 24%, respectively. A concurrent reduction is observed in the first upwelling Kelvin wave (uKW) activities in the eastern equatorial Indian Ocean as well as in the coastal BoB for these years. The reduction in the generation of the first uKW in the eastern equatorial Indian Ocean is attributed to the westerly wind anomalies in January-March of these years. Additionally, meridional wind stress anomalies during March-April in these years are found to be southerly, causing anomalous coastal downwelling in the eastern rim of BoB. This coastal downwelling blocks the propagation of the first uKW. The decrease in the first uKW activities in the coastal waveguide of the BoB reduces the radiation of upwelling Rossby waves, thereby decreasing the cyclonic eddy activities in the northern BoB. The results from this letter could be helpful for further understanding of upper ocean mixing processes in the BoB during monsoon deficit years
Neutrosophic Sets and Systems
No full textNeutrosophic Sets and Systems has been created for publications on advanced studies in neutrosophy, neutrosophic set, neutrosophic logic, neutrosophic probability, neutrosophic statistics that started in 1995 and their applications in any field, such as the neutrosophic structures developed in algebra, geometry, topology, etc
