Chandigarh University

About: Chandigarh University is a education organization based out in Mohali, India. It is known for research contribution in the topics: Computer science & Chemistry. The organization has 1358 authors who have published 2104 publications receiving 10050 citations.

Comparative study of hot corrosion behavior of thermal sprayed alumina and titanium oxide reinforced alumina coatings on boiler steel

Abstract: The current work evaluates the effect of hot corrosion on ASTM-SA213-T-22 Steel with a coating of 100Al2O3 and 20TiO2-Al2O3 at 900°C in the molten salt environment of (Na2SO4-60% V2O5). The coatings were sprayed by plasma spray technique. The bare and coated substrates were placed inside the muffle furnace at 900°C for 50 cycles. Each cycle consisted of heating for 1 hour and 20 minutes of cooling at ambient temperature. The kinetics of hot corrosion was analyzed by measuring mass gain after each cycle. The results were achieved by using visual examination, mass change measurement, XRD and SEM/EDS techniques. The result revealed that bare steel was more affected with corrosion and gained more mass due to the development of iron oxide (Fe2O3) than the coated sample. Fe2O3 and Cr2O3 were found as major phase in oxide scale of T-22 uncoated steel specimen. The 100Al2O3 and 20TiO2-Al2O3 coated specimen indicated the reduction in mass gain by 25.41% and 67.02% respectively as compared to uncoated specimen. Al2O3 coating with the combination of TiO2 showed better adhesion properties. The presence of TiO2 enhanced the durability and strength of Al2O3 coating to withstand high temperatures.

Study of Uranium in Drinking Water around the Sohna Fault Line in Haryana

Abstract: Quality of drinking water is associated directly with the health of mass population. Therefore, study on radiation level in groundwater has been taken up around the Sohna fault line, Haryana state, India. Uranium concentration has been measured in drinking water samples collected from sources such as hand pump, tube well from different depths around the Sohna fault line, using LED Fluorimetry Technique. Uranium concentration in study area varies from 0.10 µg/L to 223.16 µg/L with an average value of 22.09 µg/L. The average value of uranium concentration is within the safe limit recommended by World Health Organization (WHO, 2011) and Atomic Energy Regulatory Board. The annual effective dose has also been measured in all the water samples and is found to be below the prescribed dose limit of 100 µSvy−1 recommended by WHO (2011). Risk assessment of uranium in water is also calculated using life time cancer risk, life time average daily dose and hazard quotient. The high uranium concentration observed in certain areas is due to interaction of ground water with the soil formation of this region and the local sub-surface geology of the region.

Analytic approach to calculations of mass spectra and decay constants of heavy-light quarkonia in the framework of Bethe-Salpeter equation

Abstract: This work is an extension of the work in [Phys. Rev. D 97, 034021 (2018)] to ground and excited states of ${0}^{++}$, ${0}^{\ensuremath{-}+}$, and ${1}^{\ensuremath{-}\ensuremath{-}}$ of heavy-light ($c\overline{u},c\overline{s},b\overline{u},b\overline{s}$, and $b\overline{c}$) quarkonia in the framework of a QCD motivated Bethe-Salpeter equation (BSE) by making use of the exact treatment of the spin structure (${\ensuremath{\gamma}}_{\ensuremath{\mu}}\ensuremath{\bigotimes}{\ensuremath{\gamma}}_{\ensuremath{\mu}}$) in the interaction kernel, in contrast to the approximate treatment of the same in our previous works [H. Negash and S. Bhatnagar, Int. J. Mod. Phys. E 25, 1650059 (2016)., S. Bhatnagar and L. Alemu, Phys. Rev. D 97, 034021 (2018).]). In this $4\ifmmode\times\else\texttimes\fi{}4$ BSE framework, the coupled Salpeter equations for $Q\overline{q}$ (that are more involved than the equal mass ($Q\overline{Q}$) mesons) are first shown to decouple for the confining part of interaction, under heavy-quark approximation, and analytically solved, and later the one-gluon-exchange interaction is perturbatively incorporated, leading to their mass spectral equations. The analytic forms of wave functions obtained from these equations are then used for calculation of leptonic decay constants of ground and excited states of ${0}^{\ensuremath{-}+}$ and ${1}^{\ensuremath{-}\ensuremath{-}}$ as a test of these wave functions and the over all framework.

Wearable antenna for skin cancer detection

Abstract: This paper presents a high gain wearable metamaterial antenna for biomedical applications. The wide band antenna is designed such that it mimics the electrical properties of the human skin. The proposed antenna operating in the X-band (8–12 GHz) allows sensing of varying differences in dielectric properties among skin tissues over a wide band of frequency and thus, can be used for skin cancer detection. The proposed antenna resonates at 11.72GHz with gain of 10.9dBi. This wideband antenna is designed and simulated using EM wave solver i.e. High Frequency Structured Simulator (HFSS). This structure showed that symmetrical slotting along y axis modifies bandwidth as well as improves the gain. Here, metamaterials are used to achieve size reduction and highly directive property.