Damage assessment from curvature mode shape using unified particle swarm optimization

Bharadwaj Nanda,Damodar Maity,Dipak Kumar Maiti 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.52 No.2

A two-step procedure to detect and quantify damages in structures from changes in curvature mode shapes is presented here. In the first step the maximum difference in curvature mode shapes of the undamaged and damaged structure are used for visual identification of the damaged internal-substructure. In the next step, the identified substructures are searched using unified particle swarm optimization technique for exact identification of damage location and amount. Efficiency of the developed procedure is demonstrated using beam like structures. This methodology may be extended for identifying damages in general frame structures.

Vibration Based Structural Damage Detection Technique using Particle Swarm Optimization with Incremental Swarm Size

Bharadwaj Nanda,Damodar Maity,Dipak Kumar Maiti 한국항공우주학회 2012 International Journal of Aeronautical and Space Sc Vol.13 No.3

A simple and robust methodology is presented to determine the location and amount of crack in beam like structures based on the incremental particle swarm optimization technique. A comparison is made for assessing the performance of standard particle swarm optimization and the incremental particle swarm optimization technique for detecting crack in structural members. The objective function is formulated using the measured natural frequency of the intact structure and the frequency obtained from the finite element simulation. The outcomes of the simulated results demonstrate that the developed method is capable of detecting and estimating the extent of damages with satisfactory precision.

Damage assessment from curvature mode shape using unified particle swarm optimization

Nanda, Bharadwaj,Maity, Damodar,Maiti, Dipak Kumar Techno-Press 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.52 No.2

A two-step procedure to detect and quantify damages in structures from changes in curvature mode shapes is presented here. In the first step the maximum difference in curvature mode shapes of the undamaged and damaged structure are used for visual identification of the damaged internal-substructure. In the next step, the identified substructures are searched using unified particle swarm optimization technique for exact identification of damage location and amount. Efficiency of the developed procedure is demonstrated using beam like structures. This methodology may be extended for identifying damages in general frame structures.

Text Comprehension with Parameterized Quantum System

Y. Bharadwaj,K. Bhanu Prakash ASCONS 2021 IJASC Vol.3 No.2

Background/Objectives: Information is crucial in present world; text is one form of information that is being exchanged in alarming rates. Natural language Processing is one field that concentrates on text analysis. Methods/Statistical analysis: Text Analyzers collects the word vectors and embed them into one by calculating semantics, and their relationships were considered on bases of dependencies and dependency trees which only targets subject to object relations and vice versa. In this digital era, microblogs involve more complicated text which are very hard using dependencies and relations to comprehend in bases of contextual semantics. Findings: In this paper we are addressing this problem by building a novel quantum enhanced modal. The proposed methodology exchange parameters between NLP algorithm and Quantum native optimizer allowing us to solve non-linear problems while composing the semantics. Improvements/Applications: We have integrated our methodology into a simple question and answering system for assessment, this system will give us the scores and answers build upon context already existing on the internet. In every Assessment Quantum Trained or Q-Trained algorithm exhibited promising results when compared with the best-in-class NLP algorithm ALBERT.

Vibration Based Structural Damage Detection Technique using Particle Swarm Optimization with Incremental Swarm Size

Nanda, Bharadwaj,Maity, Damodar,Maiti, Dipak Kumar The Korean Society for Aeronautical and Space Scie 2012 International Journal of Aeronautical and Space Sc Vol.13 No.3

A simple and robust methodology is presented to determine the location and amount of crack in beam like structures based on the incremental particle swarm optimization technique. A comparison is made for assessing the performance of standard particle swarm optimization and the incremental particle swarm optimization technique for detecting crack in structural members. The objective function is formulated using the measured natural frequency of the intact structure and the frequency obtained from the finite element simulation. The outcomes of the simulated results demonstrate that the developed method is capable of detecting and estimating the extent of damages with satisfactory precision.

Dye separation using a semi-batch foaming process: Process optimization using Taguchi methodology and Grey relational analysis

Tarun Kumar Bharadwaj,Kaushal Naresh Gupta 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.4

Foam fractionation is one of the novel techniques used nowadays for the wastewater treatment. The present paper discusses the removal of methylene blue dye by using a surfactant, sodium dodecyl sulfate, as a collector, by semi-batch foam fractionation technique. The influence of operating variables like aeration rate (150 – 250 mL.min-1), liquid height (600 – 900 mL), dye concentration (5 – 25 ppm), pH (3 – 10), surfactant dose (250 – 2000 ppm) on percentage removal, enrichment ratio and surface excess were investigated. The results revealed fairly high percentage removals at various operating conditions due to strong electrostatic interaction between dye and surfactant. Further, in order to augment separation, optimization was performed by employing Taguchi-based experimental design followed by Grey relational analysis (GRA) technique. The optimal conditions were found to be: 150 mL.min-1 air flow rate, 600 mL liquid loading and 5 ppm dye concentration for percentage removal of 95.7% and an enrichment ratio of 7.49. The analysis of variance (ANOVA) suggested dye concentration to be the most influencing operating variable. Lastly, the equilibrium relationship between bulk and surface phase was established which qualitatively indicates as to how much the actual process departs from equilibrium.

Major merging history in CANDELS. I. Evolution of the incidence of massive galaxy-galaxy pairs from z = 3 to z ∼ 0

Mantha, Kameswara Bharadwaj,McIntosh, Daniel H,Brennan, Ryan,Ferguson, Henry C,Kodra, Dritan,Newman, Jeffrey A,Rafelski, Marc,Somerville, Rachel S,Conselice, Christopher J,Cook, Joshua S,Hathi, Nimish Oxford University Press 2018 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.475 No.2

<P>The rate of major galaxy-galaxy merging is theoretically predicted to steadily increase with redshift during the peak epoch of massive galaxy development (1 <= z <= 3). We use close-pair statistics to objectively study the incidence of massive galaxies (stellar M1 > 2 x 10(10)M(circle dot)) hosting major companions (1 <= M-1/M-2 <= 4; i.e. <4: 1) at six epochs spanning 0 < z < 3. We select companions from a nearly complete, mass-limited (>= 5 x 10(9)M(circle dot)) sample of 23 696 galaxies in the five Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey fields and the Sloan Digital Sky Survey. Using 5-50 kpc projected separation and close redshift proximity criteria, we find that the major companion fraction f(mc)(z) based on stellar mass-ratio (MR) selection increases from 6 per cent (z similar to 0) to 16 per cent (z similar to 0.8), then turns over at z similar to 1 and decreases to 7 per cent (z similar to 3). Instead, if we use a major F160W flux-ratio (FR) selection, we find that f(mc)(z) increases steadily until z similar to 3 owing to increasing contamination from minor (MR > 4: 1) companions at z > 1. We show that these evolutionary trends are statistically robust to changes in companion proximity. We find disagreements between published results are resolved when selection criteria are closely matched. If we compute merger rates using constant fraction-to-rate conversion factors (C-merg,C-pair = 0.6 and T-obs,T-pair = 0.65 Gyr), we find that MR rates disagree with theoretical predictions at z > 1.5. Instead, if we use an evolving T-obs,T-pair(z) alpha (1 + z)- 2 from Snyder et al., our MR-based rates agree with theory at 0 < z < 3. Our analysis underscores the need for detailed calibration of C-merg,C-pair and T-obs,T-pair as a function of redshift, mass, and companion selection criteria to better constrain the empirical major merger history.</P>

Moss Octoblepharum albidum Hedw.: Isolation, characterization, in vitro and in vivo antidiabetic activities

Tatipamula Vinay Bharadwaj,Ketha Alekhya,Nallapaty Srilakshmi,Kottana Hymavathi,Koneru Sree Teja 경희대학교 융합한의과학연구소 2021 Oriental Pharmacy and Experimental Medicine Vol.21 No.2

In India’s folklore, extracts of moss Octoblepharum albidum used in the treatment of fever, bacterial infections, and diabe-tes. The present study aimed to establish the chemical and pharmacological profile of the ethanolic extract of O. albidum(OA-Et). By using column chromatography, OA-Et yielded three known metabolites, namely 6-hydroxy-4,4,7a-trimethyl-5,6,7,7a-tetrahydrobenzofuran-2(4H)-one(1), 4,4,7a-trimethyl-2-(prop-1-en-2-yl)-2,4,5,6,7,7a-hexahydrobenzofuran-6-ol(2) and 1-(6-hydroxy-2-(2-hydroxypropan-2-yl)-4-methoxy-2,3-dihydrobenzofuran-7-yl)-ethan-1-one(3), which were reported for the first time from this species. The isolated metabolites(1–3) and OA-Et were screened against ferric ions, DPPH free-radicals, superoxide free-radicals, α-glucosidase, α-amylase and aldose-reductase assays, and particularly OA-Et subjected to glycemia activities in albino rats. Among all, 3 and OA-Et depicted significant inhibitory profiles against free-radicals. Particularly, 3 and OA-Et depicted better IC50 values on α-glucosidase and α-amylase, rather than aldose-reductase. Also, the OA-Et (200 mg/kg b.w) treated group revealed significant drop-in body weight (p > 0.001), plasma glucose (p > 0.001), total cholesterol (p > 0.005), total glycerides (p > 0.005), and LDL levels (p > 0.005) in STZ-induced diabetic rats. The HDL levels were markedly augmented in OA-Et (p > 0.005) treated diabetic rats when related to controlled rats. OA-Et abolished increased lipid peroxidation content (p > 0.001) in the pancreas, liver, and kidneys. Histopathological examination of the pan-creas of the OA-Et treated group protected the Langerhans islets with the number of islet cells found statistically significant (p > 0.05) compared to diabetic control pancreas. Thus, O. albidum has an aptitude to acts against diabetes by particularly acting against digestive enzymes, i.e., α-glucosidase and α-amylase.

Lead-free inorganic metal perovskites beyond photovoltaics: Photon, charged particles and neutron shielding applications

Prabhu Srilakshmi,Bharadwaj Dhanya Y.,Bubbly S.G.,Gudennavar S.B. 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.3

Over the last few years, lead-free inorganic metal perovskites have gained impressive ground in empowering satellites in space exploration owing to their material stability and performance evolution under extreme space environments. The present work has examined the versatility of eight such perovskites as space radiation shielding materials by computing their photon, charged particles and neutron interaction parameters. Photon interaction parameters were calculated for a wide energy range using PAGEX software. The ranges of heavy charged particles (H, He, C, N, O, Ne, Mg, Si and Fe ions) in these perovskites were estimated using SRIM software in the energy range 1 keVe10 GeV, and that of electrons was computed using ESTAR NIST software in the energy range 0.01 MeVe1 GeV. Further, the macroscopic fast neutron removal cross-sections were also calculated to estimate the neutron shielding efficiencies. The examined shielding parameters of the perovskites varied depending on the radiation type and energy. Among the selected perovskites, Cs2TiI6 and Ba2AgIO6 displayed superior photon attenuation properties. A 3.5 cm thick Ba2AgIO6-based shield could reduce the incident radiation intensity to half its initial value, a thickness even lesser than that of Pb-glass. Besides, CsSnBr3 and La0.8Ca0.2Ni0.5Ti0.5O3 displayed the highest and lowest range values, respectively, for all heavy charged particles. Ba2AgIO6 showed electron stopping power (on par with Kovar) better than that of other examined materials. Interestingly, La0.8Ca0.2Ni0.5Ti0.5O3 demonstrated neutron removal cross-section values greater than that of standard neutron shielding materials - aluminium and polyethylene. On the whole, the present study not only demonstrates the employment prospects of eco-friendly perovskites for shielding space radiations but also suggests future prospects for research in this direction

The Production of Xanthan from Brewer’s Spent Grain

Chetia Rajiv,Bharadwaj Bhriganka,Dey Rahul,Chatterji Biswa Prasun 한국미생물·생명공학회 2023 한국미생물·생명공학회지 Vol.51 No.4

Sugar or dextrose increases the cost of production of xanthan gum by Xanthomonas campestris. Brewers’ Spent Grain (BSG) was chosen as a source of fermentable sugars. BSG is a significant industrial by-product generated in large quantities from the breweries. Primarily used as animal feed due to its high fiber and protein content, BSG holds great potential as an economically and ecologically sustainable substrate for fermenting biomolecules. This study explores BSG's potential as a cost-effective carbon source for producing xanthan, utilizing Xanthomonas campestris NCIM 2961. An aqueous extract was prepared from BSG and inoculated with the bacterium under standard fermentation conditions. After fermentation, xanthan gum was purified using a standard protocol. The xanthan yield from BSG media was compared to that from MGYP media (control). The fermentation parameters, including pH, temperature, agitation and duration were optimized for maximum xanthan gum yield by varying them at different levels. Following fermentation, the xanthan gum was purified from the broth by alcoholic precipitation and then dried. The weight of the dried gum was measured. The obtained xanthan from BSG under standard conditions and commercial food-grade xanthan were characterized using FTIR. The highest xanthan yields were achieved at 32℃, pH 6.0, and 72 h of fermentation at 200 rpm using BSG media. The FTIR spectra of xanthan from BSG media closely resembled that of commercial food-grade xanthan. The results confirm the potential of BSG as a cost-effective alternative carbon source for xanthan production, thereby reducing production costs and solid waste.