Decoding the X-Ray Flare from MAXI J0709-159 Using Optical Spectroscopy and Multiepoch Photometry
We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709-159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 1037 erg s-1 (MAXI), which got reduced to 1032 erg s-1 (NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H? emission, we found emission lines of He i in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He i lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color-magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star. 2022. The Author(s). Published by the American Astronomical Society.
Bhattacharyya S.; Mathew B.; Ezhikode S.H.; Muneer S.; G. S.; G. M.; Arun R.; Anilkumar H.; Banerjee G.; Kumar S P.; Kartha S.S.; Paul K.T.; Velu C.
Astrophysical Journal Letters, Vol-933, No. 2
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.3847/2041-8213/ac7b8a https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134715004&doi=10.3847%2f2041-8213%2fac7b8a&partnerID=40&md5=2c9aa0eb23b7d85f160fd0140b4276ca
Bhattacharyya S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Mathew B., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Ezhikode S.H., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Muneer S., Indian Institute of Astrophysics, Koramangala, Bangalore, India; G. S., Indian Institute of Astrophysics, Koramangala, Bangalore, India; G. M., Indian Institute of Astrophysics, Koramangala, Bangalore, India; Arun R., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India, Indian Institute of Astrophysics, Koramangala, Bangalore, India; Anilkumar H., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Banerjee G., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Kumar S P., Indian Institute of Astrophysics, Koramangala, Bangalore, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Paul K.T., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Velu C., Indian Institute of Astrophysics, Koramangala, Bangalore, India
The convective heat transfer analysis of the casson nanofluid jet flow under the influence of the movement of gyrotactic microorganisms
Bioconvection; Casson nanofluid; Differential transform method; Gyrotactic microorganisms; Jet flow
Jet flows provide an effective mode of energy transfer or mass transfer in industrial applications. When compared to traditional cooling through convection, jet flows have high heat and mass transfer coefficients. Further, the devices equipped with jet flow provides efficient use of fluid and also offers enhanced heat and mass transfer rates. Hence in this study, the jet flow of Casson nanofluid containing gyrotactic microorganisms that stabilises the nanoparticle suspension is discussed. To control the fluid from outside external magnetic field is imposed. The model with these characteristics are useful in the appliances like coolants in automobiles, nuclear reactors, micro-manufacturing, metallurgical process etc. Such a model is created by employing PDE, which are then transformed into a system of ODE. The DTM is employed to obtain the solution to system of equations, and the results are interpreted using graphs. It is perceived that the velocity of the nanofluid flow is decreased because of the increased yield stress created by the greater values of the Casson parameter. As a result, the temperature profile is found to be increasing. Meanwhile, it is observed that for increased value of chemical reaction parameter diminishes the nanoparticle concentration. The motile density is found to decrease for increase in the Peclet number and the bioconvection Schmidt number. Further, the thermophoresis improves the temperature and concentration profile of the nanofluid. 2022 Indian Chemical Society
Puneeth V.; Khan M.I.; Jameel M.; Geudri K.; Galal A.M.
Journal of the Indian Chemical Society, Vol-99, No. 9
https://doi.org/10.1016/j.jics.2022.100612 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134826345&doi=10.1016%2fj.jics.2022.100612&partnerID=40&md5=0499a55d0bb76de3741f326f7f6b6682
Puneeth V., Department of Computational Science, School of Sciences, CHRIST(Deemed to be University), Ghaziabad, 201003, India; Khan M.I., Department of Mathematics, Faculty of Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia, Department of Mathematics and Statistics, Ripah International University I-14, Islamabad, 44000, Pakistan; Jameel M., Department of Civil Engineering, College of Engineering, King Khalid University, Asir, Abha, 61421, Saudi Arabia; Geudri K., Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm AlQura University, Makkah, 21955, Saudi Arabia; Galal A.M., Mechanical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Wadi Addawaser, 11991, Saudi Arabia, Production Engineering and Mechanical Design Department, Faculty of Engineering, Mansoura University, Mansoura, 35516, Egypt
Being socially responsible: How green self-identity and locus of control impact green purchasing intentions?
Attribution theory; External environmental locus of control; Green self-identity; IPMA; PLS-SEM; Pro-environmental locus of control
This paper investigates the influence of green self-identity (GSI) and two attributes of locus of control, namely external environmental locus of control (ExLOC) and pro-environmental locus of control (PELOC), to predict perceived consumers effectiveness (PCE) on green purchase intentions (GPI) using attribution theory. For this study, data from 391 Indian consumers were analyzed using PLS-SEM via SMARTPLS version 3.2.9. Results show that GSI positively influences both ExLOC and PELOC. Furthermore, both aspects of locus of control are significant positive predictors of PCE and have partial mediation roles. The results not only imply comprehensively expound the process of green buying intentions of consumers through self-identity but also addresses the process of attribution. The study applied the Importance Performance Map Analysis (IPMA) to compare the relative importance and performance of three antecedents (i.e., ELOC, GSI, and PCE). The finding is of utmost importance for practitioners and public authorities to design more focused strategies to increase GPI among the masses to enhance the sales of green products. 2022 The Authors
Sharma N.; Lal M.; Goel P.; Sharma A.; Rana N.P.
https://doi.org/10.1016/j.jclepro.2022.131895 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129530761&doi=10.1016%2fj.jclepro.2022.131895&partnerID=40&md5=04172efefdec9c516c97c1f1a79b398a
Sharma N., School of Commerce, Christ (Deemed to be University), NCR, Delhi, India; Lal M., Department of Commerce, University of Delhi, India; Goel P., Department of Commerce, Shaheed Bhagat Singh College, University of Delhi, India; Sharma A., Chandragupt Institute of Management Patna, Bihar, Patna, 800001, India; Rana N.P., College of Business and Economics, Qatar University, P.O. Box 2713, Doha, Qatar
Assessing transmission excellence and flow detection based on Machine Learning
Machine learning; Optical network; Packet switched optical network; Photonic switching; Scheduling algorithm
Excellence in transmission can be assessed in optical transport networks before providing any additional connections or upgrading the connections. Generally, the Physical Layer Model (PLM) is used to assess the transmission quality which has high probability in uncertainty and inaccuracy due to the circumstances of physical layer. The network efficiency is directly proportional to the margins. If the margins getting increases in the PLM, the efficiency of the network decreases. Maintaining the excellence in transmission is the biggest challenge when the margins getting increased. Other significant factors for excellence in transmission is scalable, minimum latency with maximum speed and energy efficient. Photonic switching is a hopeful solution for handling these challenges. Machine learning technique is proposed to assess the excellence of transmission and flow detection. ML-E and Precedence based scheduling algorithms are proposed for excellence of transmission and flow detection respectively. The proposed techniques justify variations, uncertainties in kits like fiber dilution, dispersion and optimizes PSON (packet switched optical network). Simulation results are demonstrated and the proposed work results indicates that it can outperform a benchmark in all aspects. 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Suresh A.; Kishorekumar R.; Kumar M.S.; Elaiyaraja K.
Optical and Quantum Electronics, Vol-54, No. 8
Suresh A., Department of Networking and Communications, School of Computing, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu, Tamil Nadu, Chennai, 603203, India; Kishorekumar R., Department of Electronics and Communication Engineering, School of Engineering and Technology, CHRIST University, Karnataka, Bangalore, 560074, India; Kumar M.S., Department of CSE, SRM Valliammai Engineering College, Tamil Nadu, Chennai, 603203, India; Elaiyaraja K., Tech Lead, Eagle Software Pvt. Ltd., Tamil Nadu, Chennai, 600006, India
Preparation, characterization, and electrochemical properties of PEO/PVDF blend films
Electrochemical properties; Polyethylene oxide; Polymer blend; Polyvinylidene fluoride; Thermal property
This paper reports the electrochemical properties of PEO, PEO/PVDF10, and PEO/PVDF30 blend films, The XRD spectra reveal the structural properties of the blend and, FTIR spectra provide the chemical interaction between the blends, and observed FESEM images of PEO/PVDF blend film shows the porous with spherulite grain structure and AFM images gives the surface topology. The thermal stability, melting point, and decomposes of the polymer blend film were examined through TGA, DTA, and DSC. CV curve shows the proper oxidation and redox reaction involved in the blend film, these results provide the prepared polymer blend film is a good candidate for used to the separator in energy storage applications. 2022 Elsevier B.V.
Basappa M.; Ganesha H.; Veeresh S.; Nagaraju Y.S.; Vandana M.; Vijeth H.; Devendrappa H.
https://doi.org/10.1016/j.cplett.2022.139609 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129568989&doi=10.1016%2fj.cplett.2022.139609&partnerID=40&md5=52bc1470348a59084931eb1f481e07cb
Basappa M., Department of Physics, Mangalore University, Mangalagangothri, 574199, India; Ganesha H., Department of Physics, Mangalore University, Mangalagangothri, 574199, India; Veeresh S., Department of Physics, Mangalore University, Mangalagangothri, 574199, India; Nagaraju Y.S., Department of Physics, Mangalore University, Mangalagangothri, 574199, India; Vandana M., Department of Chemistry, Christ (Deemed to be University), Hosur Road, Bengaluru, 560029, India; Vijeth H., Department of Physics, Nagaland University, Lumami, 798627, India; Devendrappa H., Department of Physics, Mangalore University, Mangalagangothri, 574199, India
Impact of COVID-19-Related Distress on Anxiety and Depression of College Students
anxiety; COVID-19; depression; India; mental well-being
The current study explores the impact of COVID-19 related distress factors on the mental well-being of college students. For the purpose of the study, mental well-being is measured through the depression symptoms and general anxiety levels of the students. The study used judgemental sampling to identify the respondents of the study. The final sample consisted of 147 respondents and the data was analysed on SPSS. The results suggested that while COVID-19 distress factors were not significant in predicting the level of depression symptoms experienced by the students, the general anxiety levels were significantly impacted by the distress factors. The findings are particularly useful for the teachers and institutions working to connect and teach through online platforms. 2022, Commonwealth of Learning. All rights reserved.
Mathew J.; Yadav P.; Nair S.; Gomes R.; Bhaskar S.
Journal of Learning for Development, Vol-9, No. 2, pp. 340-350.
https://doi.org/10.56059/jl4d.v9i2.560 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134575030&doi=10.56059%2fjl4d.v9i2.560&partnerID=40&md5=5f3bef0f418f2f2478947e5c73ca88b4
Mathew J., CHRIST (Deemed to be University), Bangalore, India; Yadav P., CHRIST (Deemed to be University), Bangalore, India; Nair S., CHRIST (Deemed to be University), Bangalore, India; Gomes R., CHRIST (Deemed to be University), Bangalore, India; Bhaskar S., CHRIST (Deemed to be University), Bangalore, India
FISCAL PERFORMANCE OF PANCHAYATI RAJ INSTITUTIONS (PRIs): AN EMPIRICAL ANALYSIS OF THE STATE OF ANDHRA PRADESH IN PRE AND POST-BIFURCATION PERIOD
Andhra Pradesh; Financial Autonomy; Panchayati Raj Institutions
The effectiveness of democratic decentralisation depends on the financial strength and independence of the local bodies. Financial autonomy is vital to reap the full potential benefits of decentralisation as the transfer of funds, functions, and functionaries will enable local bodies to be institutes of self-governance and not just delivery mechanisms. In the context of persistent fiscal distress across the local bodies, an attempt is made to empirically examine the fiscal performance of Panchayati Raj Institutions (PRIs) in Andhra Pradesh during 2010-11 to 2017-18, i.e. pre- and post-bifurcation periods of the State. The fiscal autonomy and the revenue dependency of PRIs across all three tiers in the State during the same period was also analysed. The study finds that the fiscal autonomy of top tiers, i.e. Mandal Praja Parishads (MPPs) and Zilla Praja Parishads (ZPPs) is negligible in both periods, while Gram Panchayats showed relatively better fiscal autonomy in both periods. 2022 National Institute of Rural Development. All rights reserved.
Gontupulugu J.; Padakandla S.R.; Makeni C.
Journal of Rural Development, Vol-41, No. 3, pp. 357-372.
Gontupulugu J., Christ (Deemed to be University), Bangalore, India; Padakandla S.R., Institute of Management Technology, Hyderabad, India; Makeni C., Nagaland University, Lumami, India
Marine macrolides as an efficient source of FMS-like tyrosine kinase 3 inhibitors: A comprehensive approach of in silico virtual screening
Docking; Drug; FMS-like tyrosine kinase 3; Marine macrolides; Virtual screening
Marine organisms are a definitive source of antibiotics and kinase inhibitors which provide cues for discovering novel drug leads. Marine macrolides are getting much attraction due to their enzyme inhibitory potential. The present study comprehensively dealt with the virtual screening and structure-based prediction of macrolide compounds against FMS-like tyrosine kinase 3 receptors (FLT3). The FLT3 was chosen as a biological target against the 990 marine macrolides. Before the virtual screening of macrolide compounds, validation of molecular docking was carried out by re-docking of co-crystallized Gilteritinib within the FLT3. Among the selected 990 candidates of marine macrolides, 311 were failed due to the generation of insufficient conformers. Amongst the successful compounds, 22 compounds were also failed to dock within the receptor, while the remaining 657 marine macrolide entities elicited successful docking. The HYBRID Chemguass4 Score ranged from -10.17 to -0.02. This vast difference in the HYBRID ChemGuass4 score is attributed to the difference in binding potential with the receptor's binding pocket. The top ten compounds were selected based on the HYBRID ChemGuass4 Score lower than -8.0 against FLT3. The pharmacokinetics and ADME properties revealed the drug likeliness of the macrolides. 2022 SAAB
Khan S.U.; Pushparaj K.; Balasubramanian B.; Meyyazhagan A.; Alghamdi S.; Alghamdi A.; Kadaikunnan S.; Alharbi N.S.; Khaled J.M.; Thiruvengadam M.
South African Journal of Botany, Vol-148, pp. 93-103.
All Open Access; Hybrid Gold Open Access
https://doi.org/10.1016/j.sajb.2022.04.006 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129300260&doi=10.1016%2fj.sajb.2022.04.006&partnerID=40&md5=07492ad0012a978d757fa6d3c0abb153
Khan S.U., Department of Pharmacy, Abasyn University Peshawar, Khyber Pakhtunkhwa, 25000, Pakistan; Pushparaj K., Department of Zoology, School of Biosciences, Avinashilingam Institute for Home Science and Higher Education for Women, Tamil Nadu, Coimbatore, 641043, India; Balasubramanian B., Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul, 05006, South Korea; Meyyazhagan A., Department of Life Science, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560076, India; Alghamdi S., Pharmaceutical Chemistry Department, Faculty of Clinical Pharmacy, Albaha University, Al Baha, P.O. Box 1988, Saudi Arabia; Alghamdi A., Department of Clinical Pharmacy, Faculty of Clinical Pharmacy, Albaha University, Albaha, P.O. Box 1988 Al Baha, Saudi Arabia; Kadaikunnan S., Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Alharbi N.S., Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Khaled J.M., Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Thiruvengadam M., Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul, South Korea
SR-Mine: Adaptive Transaction Compression Method for Frequent Itemsets Mining
Compressed transactions; FP-tree; FPclose; PrePost+; Size reduced mining; SR-Mine
Extraction of frequent itemsets is a key step in association rule mining. Frequent Pattern (FP) mining from a very large dataset is still a challenging research problem. The basic frequent itemset algorithms are Apriori and FP-growth. FP-growth uses Frequent Pattern Tree (FP-tree) to store the database information in a compressed form. A large number of research papers have been proposed as an improvement of the basic frequent itemset mining algorithms. Several researchers have proposed modifications to existing data structures as well as new data structures to improve the mining process. A new method, Size Reduced Mining (SR-Mine), is proposed to speed up the FP-tree creation. The proposed work is implemented with the basic FP-growth algorithm and with the other two recent algorithms based on FP-tree. The three modified algorithms have been tested with standard datasets and compared with the original algorithms. The proposed method can be applied with the frequent itemset mining algorithms which consider each transaction one by one to construct a data structure for mining. The experimental results show that the proposed method can improve the performance of the mining. 2021, King Fahd University of Petroleum & Minerals.
Arabian Journal for Science and Engineering, Vol-47, No. 8, pp. 9641-9657.
Springer Science and Business Media Deutschland GmbH
Jamsheela O., EMEA College of Arts and Science, Kondotty, India; Raju G., Christ College, School of Engineering and Technology, Christ University, Bengaluru, India
Performance evaluation of artificial neural networks in sustainable modelling biodiesel synthesis
Absolute average deviation (AAD); Biodiesel; Catalyst concentration; Fatty acid methyl ester (FAME); Genetic algorithm; Machine learning (ML); Response surface methodology (RSM); Transesterification
Biodiesel is a characteristic and inexhaustible homegrown fuel removed from creature fats or vegetable oil and liquor through a transesterification response. The exploration work means to assess the exhibition of biodiesel blend. In this paper, biodiesel was displayed and improved by utilizing a hereditary calculation and Artificial Neural Network (ANN). In AI, hereditary calculations and counterfeit neural organizations assume a significant part in displaying biodiesel blend. To upgrade an excellent arrangement hereditary calculation was created. The mix of ANN and Genetic Algorithm gives the ideal condition as the temperature of methanol molar proportion, impetus fixation. It tentatively decides the exhibition trademark like the Coefficient of determination and Absolute Average deviation (AAD). It predicts the Fatty Acid Methyl Ester (FAME) model productively than Response Surface Methodology (RSM). The exhibition examination is reenacted and hypothetical outcomes are recorded then it is contrasted with constant information to decide the exactness of ANN. 2022 Elsevier Ltd
Treve M.; Patra I.; Prabu P.; Rama Sree S.; Keerthi Kumar N.; Methkal Abd Algani Y.; Kiran Bala B.; Balaji S.
Sustainable Energy Technologies and Assessments, Vol-52
https://doi.org/10.1016/j.seta.2022.102098 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125008191&doi=10.1016%2fj.seta.2022.102098&partnerID=40&md5=3d6d2154f2fa983572b596d41de021de
Treve M., School of Languages and General Education, Walailak University, Thailand; Patra I., An Independent Researcher and Ex-research Scholar at NIT Durgapur, West Bengal, India; Prabu P., Department of Computer Science, CHRIST(Deemed to be University), Bangalore, India; Rama Sree S., Professor in CSE Dept., Aditya Engineering College, Andhra Pradesh, Surampalem, India; Keerthi Kumar N., Department of Mechanical Engineering, BMS Institute of Technology and Management, Avalahalli, Doddaballapur Main Road, Yelahanka, Bangalore, 560064, India; Methkal Abd Algani Y., Department of Mathematics, Sakhnin College, Israel, Department of Mathematics, The Arab Academic College for Education in Israel-Haifa, Israel; Kiran Bala B., Department of Artificial Intelligence and Data Science, K. Ramakrishnan College of Engineering, Tamil Nadu, Trichy, India; Balaji S., Department of CSE, Panimalar Engineering College, Tamil Nadu, Chennai, India
Synthetic Applications of Prins Cyclization in Natural Product Syntheses
Chiral pool; Natural products; Prins reaction; Tetrahyropyran; Total synthesis
The natural products having tetrahydropyran unit with multiple chiral centers serve as magnificent building blocks for various active pharmaceutical ingredients (APIs). Prins cyclization is one of the wonderful strategies to construct tetrahydropyran unit stereoselectively in asymmetric synthesis. In this account, we discuss our research efforts toward the synthesis of various natural products from the past two decades (20052020) by using Prins cyclization as a key step. Further, the synthetic utility of this reaction was investigated and well demonstrated on various molecules successfully. 2022 The Chemical Society of Japan & Wiley-VCH GmbH.
Tadiparthi K.; Roy A.; Sakirolla R.; Subba Reddy B.V.; Singh Yadav J.
ISSN: 15278999; PubMed ID: 35532222; CODEN: CRHEA
https://doi.org/10.1002/tcr.202200044 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129975088&doi=10.1002%2ftcr.202200044&partnerID=40&md5=4cd178fd7ec3236781a340d8589c152e
Tadiparthi K., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India; Roy A., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India; Sakirolla R., Department of Chemistry, Central University of Karnataka, Karnataka, Gulbarga, 585367, India, Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India; Subba Reddy B.V., Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India; Singh Yadav J., Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India, School of Science, Indrashil University, Gujarat, Kadi, Mehsana, 382740, India
Experimental Verification of Gain and Bandwidth Enhancement of Fractal Contoured Metamaterial Inspired Antenna
Energy harvestment; Fractal Gain; INDEX TERMS Broadband; Metamaterial; Radiation pattern; S11
The performance of any antenna cannot be completely assessed purely on the basis of simulation results. All simulations are made by assuming an ideal environment where the fabrication tolerances and practical losses are not accounted for. Therefore, evidencing the performance experimentally becomes a crucial step. In this work, the experimental validation of a fractal contoured square microstrip antenna with four ring metamaterial structure, hereon referred to as optimized metamaterial inspired square fractal antenna has been presented. It is an extension to previously designed antenna and aims to experimentally verify the enhanced gain and bandwidth of this antenna. The design and simulation of the proposed antenna was accomplished by using Ansys HFSS v18.2. The end-to-end antenna spread area is 23 mm x 23 mm on a 46 mm x 28 mm x 1.6 mm FR4 substrate with ?r of 4.4. The simulated design was fabricated using Nvis 72 Prototyping Machine and measured in an anechoic chamber facility using vector network analyzer. The antenna resonates with the deepest S11 of-39.5 dB in a broad bandwidth of 2.53 GHz from 2.265 GHz to 4.79 GHz with experimental verification. The proposed antenna provides an enhanced gain of 8.81 dB at the most popularly used frequency of 2.5 GHz. The simulation and experimental results of resonance, gain and radiation pattern are found to agree maximally. The fractional bandwidth offered by this proposed antenna is 72.28%. The experimental validation confirms enhanced gain-bandwidth performance in a wide resonance band. Hence, this antenna is well recommended for wireless, energy harvesting rectenna and sub-6 GHz (2.5 GHz to 4.20 GHz) 5G applications. 2022, Advanced Electromagnetics. All rights reserved.
Advanced Electromagnetics, Vol-11, No. 3, pp. 42-49.
https://doi.org/10.7716/aem.v11i3.1899 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85138407021&doi=10.7716%2faem.v11i3.1899&partnerID=40&md5=67454986dd3fea88438f596b32921b77
Suganthi S., RF and Microwave Research Laboratory, ECE Department, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India; Shashikumar D., RF and Microwave Research Laboratory, ECE Department, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India; Chand E., RF and Microwave Research Laboratory, ECE Department, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India
Evaluating the performance of Cr-Soc-MOF Super-Adsorbents for CO2 capture from flue gas under humid condition through molecular simulation
Breakthrough; CO2 Capture; DFT; Flue gas; GCMC; Metal Organic Framework
One of the major criticisms for gas separation by utilizing Metal Organic Framework (MOF) porous material for all classes of adsorbents is their very poor performance under humidified gas streams. Very few MOFs show better CO2 separation from N2 mixture in the presence of moisture. Conversely, plenty of MOFs demonstrated good CO2 capture from dry gas streams. In order to explore the potential characteristics of gas separation under humid conditions by coordinatively unsaturated metal organic framework (CUS-MOF) with square octahedral (Soc) topology were exercised single component (CO2, N2) adsorption and co-adsorption (CO2/N2) in the presence of moisture at 298 K with pressure ranging from 0 to 10 bar. Herein, we investigated five exceptional Cr-Soc-MOFs similar to the experimentally established iso-structural topology by differing the polynuclear aromatic ring size and N-heteroatom to their pore wall. The specific interaction of guest molecules to the coordinatively unsaturated metal site (CUS), i.e., rigid ?3-oxygen-centered tri-nuclear metal carboxylate, of Cr-Soc-MOF-n series were identified with Density Functional Theory (DFT) calculations, this energy profile was used to derive specific force field. Further, Grand canonical Monte Carlo (GCMC) simulation was employed with DFT-derived force field to identify suitable CO2 capture for Cr-Soc-MOFs in the presence of moisture. Interestingly, the Cr-Soc-MOFs with larger pore volume were retained not only CO2 uptake in the range of 23 35 wt% but also selectivity about 20 50 range even up to 70% of RH. Importantly, we introduced a mathematical tool to theoretically analyze the dynamic co-adsorption in the form of breakthrough curve measurement from CO2/N2 simulated co-adsorption by mimicking the real flue gas condition, also working capacity (?N), Regenerability (R%) and Adsorbent Performance Indicator (API) of Cr-Soc-MOF-n series were investigated. The CO2 separation performances of Cr-Soc-MOF-n series suggested that the polynuclear aromatic ring to their pore wall withstand CO2 uptake in the presence of humidity rather than N-heteroatom decorated Cr-Soc-MOF due to its high pore volume and the accommodation of extra aromatic ring in their pore channels. 2022 Elsevier B.V.
Separation and Purification Technology, Vol-295
https://doi.org/10.1016/j.seppur.2022.121298 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130612972&doi=10.1016%2fj.seppur.2022.121298&partnerID=40&md5=4e85682e927427627d39fedc5905b190
Palakkal A.S., Department of Chemistry, School of Basic Sciences, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603 203, India; Pillai R.S., Department of Chemistry, Christ University, Karnataka, Bangalore, 560 029, India
Agricultural credit and agricultural productivity across Indian states: An analysis
agricultural productivity; direct credit; fixed effect model; indirect credit
The study analyses the relationship between formal agricultural credit and agricultural productivity in India. Secondary data have been collected from various sources for the selected states of Andhra Pradesh, Assam, Bihar, Gujarat, Haryana, Himachal Pradesh, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Punjab, Rajasthan, Odisha, Tamil Nadu, Uttar Pradesh and West Bengal for the time period 19901991 to 20172018. Fixed effect model is used to perform the state-level panel data analysis to establish the relationship between the agricultural credit and agricultural productivity. In addition to this, the study also focuses on analysing the effectiveness of Doubling of agricultural credit policy. The findings from the analysis show that direct agricultural credit and doubling of agricultural credit policy has a positive impact on productivity, whereas the indirect credit has a significant negative impact on productivity. In order to increase agricultural productivity, policies should focus on providing direct credit at a larger scale. 2021 John Wiley & Sons, Ltd.
Journal of Public Affairs, Vol-22, No. 3
https://doi.org/10.1002/pa.2597 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099943365&doi=10.1002%2fpa.2597&partnerID=40&md5=d56918ba47a21950d1ced54080d04e6d
Manoharan N., Department of Economics, Christ (Deemed to be university), Bengaluru, India; Varkey R.S., Department of Economics, Christ (Deemed to be university), Bengaluru, India
Pure red luminescence and concentration-dependent tunable emission color from europium-doped zinc sulfide nanoparticles
Nano-sized Eu3+-doped ZnS particles were prepared by chemical precipitation method using polyethylene glycol as capping agent. The structural and morphological studies of ZnS:Eu3+ nanoparticles were carried out using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). XRD results show that ZnS:Eu3+ nanoparticles have a cubic structure for all Eu3+ concentrations. Dependence of doping concentration on the photoluminescence (PL) of ZnS:Eu3+ nanophosphor was studied for excitations at 395nm and 465nm. At 395-nm excitation, emission colors of ZnS:Eu3+ nanophosphor lie in blue, green, yellow, and red regions of chromaticity diagram for different doping concentrations. But for all doping concentrations we got red emission when the excitation wavelength was 465nm and the color purity was 92% for 0.03M doped sample. 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Journal of Materials Science: Materials in Electronics, Vol-33, No. 22, pp. 17793-17801.
Bindu K.R., Optoelectronic and Nanomaterials Research Laboratory, Union Christian College, Aluva, Kerala, Kochi, 683102, India, Sree Sankara Vidyapeetom College, Valayanchirangara, Kerala, Ernakulam, 683556, India; Safeera T.A., Department of Physics, MES Asmabi College, P Vemballur, Kodungallur, Kerala, Thrissur, 680671, India; Anila E.I., Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
This article attempts to look into the concept of othering in the context of urban development. The major motivation for the initiation of this article came after reading Dipankar Guptas book review titled A New Sociology Awaits Us (EPW, 26 December 2020), which mainly concentrated on urban affairs. 2022 Economic and Political Weekly. All rights reserved.
Economic and Political Weekly, Vol-57, No. 34, pp. 61-63.
Varma S., The Department of Economics, Christ (Deemed to be University), Bengaluru, India
Complicated Grief during COVID-19: An International Perspective
bereavement tasks; complicated grief; COVID-19; culture; mourning; tradition
Cultures across the globe have evolved time-tested rituals to honor those who die and offer solace and support to survivors with the goal of helping them to accept the reality of the death, cope with the feelings of loss, adjust to life without the deceased, and find ways to maintain a connection to the memory of the deceased. The COVID-19 pandemic has disrupted these rituals and brought significant changes to the way we mourn. Specifically, public health responses to COVID-19 such as social distancing or isolation, delays or cancellations of traditional religious and cultural rituals, and shifts from in-person to online ceremonies have disrupted rituals and thus made it more difficult to access support and complete the psychological tasks typically associated with bereavement. This paper conceptualizes the common bereavement tasks including emotion-focused coping, maintaining a connection to the deceased, disengagement and reframing death and loss, and problemfocused coping. It provides examples of how the COVID-19 pandemic has altered mourning rituals across several cultures and religions and contributed to prolonged grief disorder as defined by the ICD-11 that includes depressive symptoms and post-traumatic stress. Early evidence suggested that the suddenness of loss, the social isolation, and the lack of social support often associated with COVID-19-related death are salient risk factors for complicated grief. As a consequence, psychological assessments, grief counseling, and mental health support are needed by families of patients who died from COVID-19. These services must be essential components of any comprehensive public health response to the pandemic. 2022 Hogrefe Publishing.
Khoury B.; Barbarin O.; Gutirez G.; Klicperova-Baker M.; Padakannaya P.; Thompson A.
International Perspectives in Psychology: Research, Practice, Consultation, Vol-11, No. 3, pp. 214-221.
https://doi.org/10.1027/2157-3891/a000055 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135030797&doi=10.1027%2f2157-3891%2fa000055&partnerID=40&md5=c7f5f9bace380c3ad0da1fbb83082498
Khoury B., Department of Psychiatry, American University of Beirut Medical Center, PO Box 11-0236/B2, Riad El-Solh, Beirut, 1107 2020, Lebanon; Barbarin O., Department of African American Studies and Psychology, University of Maryland, College Park, MD, United States; Gutirez G., Departamento de Psicolog, Universidad Nacional de Colombia, Bogot Colombia; Klicperova-Baker M., Institute of Psychology, Czech Academy of Sciences, Prague, Czech Republic; Padakannaya P., Department of Psychology, Christ University, Bangalore, India; Thompson A., Department of Psychology, Sociology & Social Work, School of Social Sciences, University of the Bahamas, Nassau, Bahamas
Study of Transport Characteristics using Impedance Spectroscopy and Memristor Property Analysis of Protonated Polyaniline-WO3 Nanocomposite
impedance analysis; memristor; polyaniline; VOC sensor; WO3
Polyaniline-WO3 nanocomposite was synthesized through in-situ chemical polymerization. The structural properties are studied by using XRD and FESEM characterization. The XRD results confirmed the presence of crystalline WO3 nanoparticles in the polymer nanocomposite structure. FESEM images confirmed the sheet-like structure with heterojunction of WO3 nanoparticles and polyaniline matrix. The transport properties of the synthesized nanocomposites are studied using impedance spectroscopy analysis. The complex impedance analysis conducted using the Nyquist plot and equivalent circuit model of the nanocomposites are simulated using ZSimpWin software. The major conduction mechanism in the material is found to be grain boundary effect and the grain boundary conduction parameters are calculated. The polyaniline-WO3 nanocomposite with WO3 doping concentration of 15% has exhibited better sensing characteristics towards the target VOC (Volatile Organic Compound) 3-Carene, a breath-based biomarker for malaria. The memristor sensor model of the polyaniline nanocomposite with 15% of WO3 is simulated using MATLAB-Simulink. The pinched hysteresis loop obtained confirmed the memristor properties of the material. 2022, Universiti Malaysia Perlis. All rights reserved.
International Journal of Nanoelectronics and Materials, Vol-15, No. 3, pp. 253-268.
Jisha P., Department of Medical Electronics Engineering, B.M.S. College of Engineering, Bangalore, India; Suma M.S., Department of Medical Electronics Engineering, B.M.S. College of Engineering, Bangalore, India; Haneesh K.M., Department of Electrical and Electronics Engineering, CHRIST University, Bangalore, India
Stigma among COVID-19 patients in South India-A cross-sectional study
COVID-19; home isolation; hospital care; stigma
Background: COVID-19 has a significant biopsychosocial impact on the lives of people who are infected, with the stigma associated with the illness being one of the major issues. However, the level of stigma based on demographics, gender differences, hospital-based or home-based care is yet to be explored. Hence, this study aimed to infer the level of stigma between these groups in the urban district of south India. Materials and Methods: This cross-sectional study recruited 50 participants who were recently infected with COVID-19 and were receiving either hospital or home-based care. The stigma was assessed using a standardized questionnaire which has four domains. MannWhitney U test was conducted to analyze the data. Results: Median age is 54 years and the majority of the participants are male (74%). The mean score of enacted stigma subscale was 4.48, disclosure fear was 2.34, internalized stigma was 2.82, perceived externalized stigma was 7.32 and the total stigma mean score was 17. The perceived externalized stigma subscale was higher in males (7.57 5.96) when compared to females 6.62 5.53. Total stigma scores were higher for males 17.2 10.1 when compared to females 16.2 10.5. The total stigma score was more (17 10.3) among home isolated COVID patients as compared to hospitalized patients (16.9 10.2). Conclusion: Increased levels of stigma among COVID-19 patients have various important psychosocial implications. This study highlights the need for larger prospective cohort studies to further understand stigma in the context of COVID-19. 2022 by the Author(s).
Shetty K.V.; Amaresha A.C.; Bamney U.; Rajkumar R.P.; Srivastava P.; Mahesh G.
Archives of Mental Health, Vol-23, No. 2, pp. 123-128.
https://doi.org/10.4103/amh.amh_189_21 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149918617&doi=10.4103%2famh.amh_189_21&partnerID=40&md5=ff49f7ef0ea191ae2f0e420b2bf3c7b3
Shetty K.V., School of Social Work, Ignou, New Delhi, India; Amaresha A.C., Department of Sociology and Social Work, Christ (Deemed to Be University), Karnataka, Bengaluru, India; Bamney U., Department of Social Work, Central University of Karnataka, Karnataka, Kalaburagi, India; Rajkumar R.P., Department of Psychiatry, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India; Srivastava P., Department of Clinical Psychology, Institute of Psychiatry, West Bengal, Kolkata, India; Mahesh G., School of Social Work, Ignou, New Delhi, India
Computational simulation of surface tension and gravitation-induced convective flow of a nanoliquid with cross-diffusion: An optimization procedure
Boundary layer flow; Inclined magnetic field; Marangoni convection; Nanoliquid; RSM; Sensitivity analysis; Thermal radiation
The control of heat transfer in the hydromagnetic semiconductor crystal involves Marangoni convection with buoyancy forces. In this study, the conventional thermo-solutal Marangoni mixed flow model is modified by incorporating the solutal buoyancy effects that are significant in the flow phenomenon. The heat and mass transfer (HMT) characteristics of the Marangoni convective flow of a Cu ? H2O nanofluid subjected to the assisting/resisting buoyancy forces and cross-diffusion are numerically studied. The homogeneous single-phase nanoliquid model is used in conjunction with experimental data of dynamic viscosity and thermal conductivity. The Dufour and Soret effects are considered. Governing equations are solved using the finite difference-based algorithm. The problem is analyzed in a unified way considering the cases of buoyancy-assisted flow and buoyancy-opposed flow. The response surface methodology (RSM) based on the face-centered composite design (CCD) is used to optimize the heat and mass transfer rates. A multivariate regression model is proposed and authenticated prior to optimization. Additionally, sensitivity analysis is performed using the full quadratic regression model. The increase in the temperature profile is more significant due to the radiative heat flux than the inclined magnetic field. Heat transfer has a high sensitivity to the appearance of thermal radiation, while mass transfer has a high sensitivity to the Soret effect. Simultaneous optimization of HMT rates is achieved with the high level of thermal radiation and low levels of the cross-diffusion aspects. 2022
Applied Mathematics and Computation, Vol-425
https://doi.org/10.1016/j.amc.2022.127108 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127209052&doi=10.1016%2fj.amc.2022.127108&partnerID=40&md5=e78a60c498645bd33e5ebbfa752128dc
Mackolil J., Department of Mathematics, Centre for Mathematical Needs, CHRIST (Deemed to be University), Bengaluru, 560029, India; Mahanthesh B., Department of Mathematics, Centre for Mathematical Needs, CHRIST (Deemed to be University), Bengaluru, 560029, India