Harshavardhan Manjunatha

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Crawling the web for ads related to human trafficking yields a wealth of traditional static and dynamic web page content. Ads in which victims are trafficked by their predators are often littered with textual signals such as physical characteristics (hair, body type, race, ethnicity, etc.), and location information (city, state) that can aid law enforcement(More)
The effective atomic number of a biomolecule for photon interaction present in DNA, RNA and retina has been estimated in the energy range 0.001-20 MeV using two different numerical methods. The significant variation of Zeff with photon energy is reported. This shows that Zeff is not constant with energy for photon interaction in DNA, RNA and retinal.
The study of photon interaction with different composite materials has become a topic of prime importance for radiation physicists. Some parameters of dosimetric interest are the mass attenuation coefficient, effective atomic number, and electron density; these help in the basic understanding of photon interactions with composite materials. The photon(More)
The effective atomic numbers (Z(eff)) and electron densities (N(el)) of cortical and compact bone have been computed for total and partial photon interactions (photoelectric absorption, coherent scattering, incoherent scattering, pair production in a nuclear field, pair production in an electronic field, and sum of non-coherent scattering) by computing the(More)
The Bremsstrahlung exposure induced by some of the therapeutic beta nuclides ((90)Y, (143)Pm, (169)Er, (204)Tl, (210)Bi, (89)Sr, (45)Ca and (131)I) in DNA and RNA has been calculated by extending the national council for radiation protection model. It has estimated the specific Bremsstrahlung constant (Γ(Br)), Probability of energy loss by beta during(More)
Computerized tomography (CT) number (it is a normalized value of the x ray absorption coefficient of a pixel in a computed tomogram) and the effective atomic number (Z(eff)) of teeth [enamel outer surface (EOS), enamel middle (EM), enamel dentin junction towards enamel (EDJE), enamel dentin junction towards dentin (EDJD), dentin middle (DM), and dentin(More)
Effective atomic numbers' (Z(eff)) effective electron density (N(el)) for human organs and tissues have been computed in the energy region of 1 keV to 100 GeV using WinXCOM. The computed data of Z(eff) and N(el) are tabulated. The computed values are compared with previous results. The computed data of Z(eff)and N(el)for almost all tissues (34 tissues of(More)
In the nuclear medicine, beta nuclides are released during the treatment. This beta interacts with bone and muscle and produces external Bremsstrahlung (EB) radiation. Present work formulated a new method to evaluate the EB spectrum and hence the Bremsstrahlung dose of therapeutic beta nuclides (Lu-177, Sr-90, Sm-153, I-153, Cs-137, Au-201, Dy-165, Mo-99,(More)
Theoretical data of external Bremsstrahlung (EB) radiation cross section of bone is estimated using tabulated results of EB cross section given for various elements at various photon and electron energies. This data may be useful in the analysis of Bremsstrahlung imaging which is the technique applied in medical therapy.
In the natural uranium-238 decay series, pure beta isotopes such as (234)Th, (234)Pa, (214)Pb, (214)Bi, (210)Pb and (210)Bi are released. The few lead isotopes such as (211)Pb, (212)Pb, (213)Pb and (215)Pb are good beta emitters. In certain nuclear reactions of reactor these isotopes are released. These beta isotopes have maximum beta energies, which induce(More)