Environment and Changing Agricultural Practices: Evidence from Orissa, India

In this paper attempt is made to examine vulnerability of farm households’ to adverse consequences of climate variables and extreme conditions like: food and cyclone. Three key components impeding food security with in the substance production structure are identified as (i) Inadequate food production by farm households. (ii). Distribution and marketing constrains and (iii) Low households’ income & procurement. Sampled data was used in the Cobb-Douglass function. This model and its results reveal that agriculture is largely dependent upon input prices, prices of livestock, and that of fertilizers. Highly significant response of farms’ income to precipitation reveals that investment in irrigation would improve farms’ income.Environment, Vulnerability of Households, Changing Climate, Agriculture Production and Income

Localized reversible nanoscale phase separation in Pr_0.63Ca_0.37MnO_3 single crystal using a scanning tunneling microscope tip

We report the destabilization of the charge ordered insulating (COI) state in a localized region of Pr_0.63Ca_0.37MnO_3 single crystal by current injection using a scanning tunneling microscope tip. This leads to controlled phase separation and formation of localized metallic nanoislands in the COI matrix which have been detected by local tunneling conductance mapping. The metallic regions thus created persist even after reducing the injected current to lower values. The original conductance state can be restored by injecting a current of similar magnitude but of opposite polarity. We thus achieve reversible nanoscale phase separation that gives rise to the possibility to "write, read, and erase" nanosized conducting regions in an insulating matrix with high spatial resolution.Comment: 8 pages, 4 figures, Appl. Phys. Lett (accepted for publication

Statistical Spectroscopy for Neutron-rich sd-Shell Nuclei

Statistical spectroscopic results using the spectral distribution theory are obtained for the structure of neutron-rich light nuclei going towards the drip line and compared to experimental values available. These results will be useful for nuclear astrophysics problems where often averaged nuclear properties are adequate.Comment: 12 pages LaTeX, 4 postscript figure