Impact of Leverage on Valuation of Non-Financial Firms in India under Profitabilitys Moderating Effect: Evidence in Scenarios Applying Quantile Regression
debt ratio; firm value; net profit margin; profitability; sales
The firms valuation (FV) is the key element for all stakeholders, particularly the investors, for their investment decisions. The main impetus of this research is to estimate the effects of the debt ratio (DR, i.e., leverage) on the FV (i.e., assets and market capitalisation) of the non-financial firms listed in India. The quantile panel data regression (QPDR) on the secondary data of 76 non-financial BSE-100 listed firms in India is employed. This study also checks the effect of the net profit margin (NPM) as profitability on the association between DR and FV. The QPDR estimates result in multiple quantiles and provide evidence in scenarios. The findings reveal a positive relationship of DR to assets only in higher quantiles, i.e., 90%ile), and a negative association of DR is found with a market capitalisation in all quantiles. Under the interaction effect, profitability (NPM) does not affect the association of DR with assets but negatively affects the association of debt ratio with market capitalisation in the middle (50%) quantile. The findings indicate that leverage (DR) affects a firms value. The studys outcomes are helpful to all stakeholders, particularly investors, to realise the leverage (DR) as a critical indicator of FV before making any investment decisions. Managers should also consider lower debt ratios for better firm value. The present analysis is original and holds novelty in the form of the moderating role of the net profit margin, i.e., the profitability of the firm between DR and FV in the non-financial firm in India. To the best of our knowledge, no such studies have been performed to look for the association of the debt ratio with a firms value under the effect of profitability in different quantiles using quantile regression. 2023 by the authors.
Kanoujiya J.; Jain P.; Banerjee S.; Kalra R.; Rastogi S.; Bhimavarapu V.M.
Journal of Risk and Financial Management, Vol-16, No. 8
Multidisciplinary Digital Publishing Institute (MDPI)
https://doi.org/10.3390/jrfm16080366 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168917442&doi=10.3390%2fjrfm16080366&partnerID=40&md5=cf2356b7ef96a7acf694a43c60dbff86
Kanoujiya J., Symbiosis Institute of Business Management, Symbiosis International (Deemed University), Pune, 412115, India; Jain P., Amity Business School, Amity University, Gwalior, 474020, India; Banerjee S., Management Development Institute Murshidabad, Murshidabad, 742235, India; Kalra R., School of Business and Management, CHRIST (Deemed to be University), Bangalore, 560029, India; Rastogi S., Symbiosis Institute of Business Management, Symbiosis International (Deemed University), Pune, 412115, India; Bhimavarapu V.M., Symbiosis School of Banking and Finance, Symbiosis International (Deemed University), Pune, 412115, India
Advancements in optical steganography for secure medical data transmission in telehealth systems
Adaptive steganography techniques; Optical steganography; Quantum steganography; Secure medical data transmission; Telehealth systems
Secure medical data transfer technologies have advanced as a result of the brisk growth of telehealth services. This study provides a thorough review of the most up-to-date research on using optical steganography to conceal medical records from prying eyes. Data concealing capacity has been increased without sacrificing picture quality using new techniques that make it difficult for unauthorised parties to access hidden information. Using adaptive steganography methods, medical data may be encoded in images in a way that makes it impossible to detect or extract by prying eyes. By concealing information over many picture layers, multi-layer steganography adds an extra degree of protection from prying eyes. The development of steganographic techniques has been spurred on by the use of machine learning and artificial intelligence to enhance steganalysis and the use of quantum characteristics to offer an extra layer of security in quantum steganography. Combining this with cryptographic safeguards like encryption provides an additional layer of security. In order to successfully safeguard sensitive medical data during transmission, standardisation and compliance in optical steganography are becoming more important as telehealth systems become more widespread. 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Patange A.; Mahesan K.V.; Manjula C.; Donald C.; Babu S.; Peroumal V.; Arumugam M.
Optical and Quantum Electronics, Vol-55, No. 9
Patange A., Department of Medicine, Krishna Institute of Medical Sciences, Krishna Vishwa Vidya Peeth (Deemed University), MS, Karad, India; Mahesan K.V., Dr. Ambedkar Institute of Technology, Bangalore, India; Manjula C., Department of Mechatronics, Oxford College of Engineering, Bangalore, India; Donald C., Department of Computer Science, CHRIST (Deemed to be University), Bangalore, India; Babu S., Department of Biochemistry, Symbiosis Medical College for Women, Symbiosis International (Deemed University), Pune, India; Peroumal V., School of Electronics Engineering, Vellore Institute of Technology, Chennai, India; Arumugam M., Center for Transdisciplinary Research, Saveetha Dental College, Saveetha Institute of Medical and Technical Science, Chennai, India
Enhancing Sustainable Urban Energy Management through Short-Term Wind Power Forecasting Using LSTM Neural Network
LSTM; short-term wind power forecasting; urban city energy management systems; wind energy forecasting
Integrating wind energy forecasting into urban city energy management systems offers significant potential for optimizing energy usage, reducing the carbon footprint, and improving overall energy efficiency. This article focuses on developing a wind power forecasting model using cutting-edge technologies to enhance urban city energy management systems. To effectively manage wind energy availability, a strategy is proposed to curtail energy consumption during periods of low wind energy availability and boost consumption during periods of high wind energy availability. For this purpose, an LSTM-based model is employed to forecast short-term wind power, leveraging a publicly available dataset. The LSTM model is trained with 27,310 instances and 10 wind energy system attributes, which were selected using the Pearson correlation feature selection method to identify crucial features. The evaluation of the LSTM-based forecasting model yields an impressive R2 score of 0.9107. The models performance metrics attest to its high accuracy, explaining a substantial proportion of the variance in the test data. This study not only contributes to advancing wind power forecasting, but also holds promise for sustainable urban energy management, enabling cities to make informed decisions in optimizing energy consumption and promoting a greener, more resilient future. 2023 by the authors.
Kanagarathinam K.; Aruna S.K.; Ravivarman S.; Safran M.; Alfarhood S.; Alrajhi W.
Sustainability (Switzerland), Vol-15, No. 18
https://doi.org/10.3390/su151813424 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85172864555&doi=10.3390%2fsu151813424&partnerID=40&md5=c9615f35f0b9e0b7ac70a0f67273dba5
Kanagarathinam K., Department of Electrical and Electronics Engineering, GMR Institute of Technology, Rajam, 532127, India; Aruna S.K., Department of Computer Science and Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, 560029, India; Ravivarman S., Department of Electrical and Electronics Engineering, Vardhaman College of Engineering, Shamshabad, 501218, India; Safran M., Department of Computer Science, College of Computer and Information Sciences, King Saud University, P.O. Box 51178, Riyadh, 11543, Saudi Arabia; Alfarhood S., Department of Computer Science, College of Computer and Information Sciences, King Saud University, P.O. Box 51178, Riyadh, 11543, Saudi Arabia; Alrajhi W., Department of Computer Science, College of Computer and Information Sciences, King Saud University, P.O. Box 51178, Riyadh, 11543, Saudi Arabia
An Improved Combined Adaptive Outline for Contrast Enhancement of Blood Vessels
Adaptive histogram equalization (AHE); Brightness preserving bi-histogram equalization (BBHE); Contrast enhancement; Histogram equalization (HE)
Appropriate vascular segmentation is dependent on effective picture pre-processing techniques that improve the contrast of the blood vessels, reduce noise, eliminate non-uniform illumination, highlight thin vessels, and retain background texture. These techniques are necessary for accurate vessel segmentation. Here, both the edge- and texture-smoothed data from the vessel probability map are used in the derivation of the adaptive optimal q-order in the G-L mask. The smooth information is not affected, the textures are maintained, and the contrast of the blood vessels is enhanced, thanks to the proposed filter. In addition to sharpening the focus on the vessels themselves, a Gaussian curve fitting is used to contrast stretch the entire image. Retinal fundus images processed with cerebral DSA are subjected to both qualitative and quantitative assessments of contrast enhancement. Quantitative performance indicators are tabulated and compared to other approaches to show how well this technique works for improving medical images everywhere. The suggested filter is easy to implement, flexible enough to adapt to different images, and effective at increasing both vessel contrast and overall image contrast. 2023, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.
Warrier G.S.; Mahapatra H.; Khuntia M.; Rajesh M.; Vincent R.; Pathak A.
https://doi.org/10.1007/s42979-023-02069-5 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169662274&doi=10.1007%2fs42979-023-02069-5&partnerID=40&md5=22aed3dbd0bfad5b3673a1e1bdec3f24
Warrier G.S., Department of Computer Science, Christ(Deemed to be University), Karnataka, Bangalore, 560 073, India; Mahapatra H., Department of Endocrinology, IMS & SUM Hospital, SOA University, Bhubaneswar, India, Sevayan Diabetes Centre, Puri, India; Khuntia M., Department of Rural Management, KIIT University, Bhubaneswar, India; Rajesh M., School of Computer Science and Engineering, Vellore Institute of Technology, Chennai, India; Vincent R., School of Computer Science and Engineering, Vellore Institute of Technology, Chennai, India; Pathak A., Department of Computer Science, Shobhit Institute of Engineering & Technology (Deemed to-be University), Meerut, India
The effect of hopeful lyrics on levels of hopelessness among college students
Hopeful; Hopelessness; Intervention; Listening; Lyrics; Music
Hopelessness is a product of negative future expectations, negative feelings toward the future, and feeling a lack of control over future improvements. College students are seen to experience hopelessness. This study aimed to reduce levels of hopelessness in college students through an intervention that involved listening to songs having hopeful lyrics. The sample consisted of college students (N = 66), who were randomly assigned to three groups, namely the lyrics-music group, music-only group, and the control group (no intervention). The Becks Hopelessness Scale was used to measure their levels of hopelessness before the intervention and at the end of four weeks. The lyrics-music group and the music group participants were exposed to songs and instrumental tracks, respectively, twice a week, for four weeks. The Wilcoxon Signed-Rank test for related samples was used to analyze the effect of the intervention on levels of hopelessness. The KruskalWallis test was used to analyze the differences across the three groups. Results indicated that the lyrics-music group had a significant decrease in levels of hopelessness after the intervention. However, the music group and the control group showed no significant decrease. There was a significant difference between the three groups with regard to the difference score obtained from pre to post intervention. Thus, the evidence suggests that hopeful lyrics do have an effect on hopelessness and can be seen as differing from the functions of music alone. 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Current Psychology, Vol-42, No. 25, pp. 21648-21658.
Prasadam S.E., Department of Psychology, CHRIST (Deemed to be University), Hosur Road, Karnataka, Bengaluru, 560 029, India; Thomas E., Department of Psychology, CHRIST (Deemed to be University), Hosur Road, Karnataka, Bengaluru, 560 029, India
Cultural Expression of Anxiety Symptoms in Kannada Language: A Qualitative Study
Anxiety; Culture; Culture-specific tool; Qualitative; Tool development
Background: In anxiety disorders, culture is important in symptom presentation and help-seeking. Most tools for anxiety disorders are not validated in India and thus might not capture culture-specific aspects of anxiety. This study aims to identify and generate culturally specific terms to describe symptoms of anxiety as part of the development of the Kannada version of the Panic and Anxiety National Indian Questionnaire (PANIQ). The PANIQ is a tool under development to identify anxiety and panic in Indian settings. Methods: This study used qualitative methods like focus group discussions (FGDs) and in-depth interviews (IDIs) to identify and generate items related to anxiety and panic in Kannada from stakeholders like individuals with anxiety disorders, their caregivers, healthcare workers, and mental health professionals who treat individuals with anxiety and panic disorders. Five FGDs (n = 28), one triad (n = 3), and 34 IDIs (n = 34) were conducted. Results: The mean age of the participants was 38.9 (standard deviation: 12.28) years; 57.1% were from rural areas. We generated 615 Kannada items. These were classified into 21 domains and facets. Items in domains like Somatic symptoms, Fear, and Impairment in day-to-day life were higher than those noted in existing tools for anxiety that focus more on cognitive symptoms of anxiety. Conclusions: This study generated culturally specific items of anxiety through a qualitative process of tool development incorporating subjective experiences of persons with anxiety disorders and other stakeholders. This is among the first steps toward the development of PANIQ. 2022 The Author(s).
Sowmya H.R.; Ghani S.; Sreedaran P.; Sahu M.K.; Mysore A.; Sharan P.
Indian Journal of Psychological Medicine, Vol-45, No. 5, pp. 496-502.
All Open Access; Gold Open Access; Green Open Access
Sowmya H.R., St. Johns Research Institute, Karnataka, Bangalore, India; Ghani S., Christ University, Karnataka, Bangalore, India; Sreedaran P., Dept. of Psychiatry, St. Johns Medical Hospital, Karnataka, Bangalore, India; Sahu M.K., Dept. of Psychiatry, Pt. J.N.M. Medical College, Karnataka, Raipur, India; Mysore A., Dept. of Psychiatry, St. Johns Medical Hospital, Karnataka, Bangalore, India; Sharan P., Dept. of Psychiatry, All India Institute of Medical Sciences, New Delhi, India
Hierarchical BiFeO3/Cr2CTx MXene composite as a multifunctional catalyst for hydrogen evolution reaction and as an electrode material for energy storage devices
BiFeO3 nanoparticles; Cr2CTx MXene; HER; Multifunctional catalyst; Supercapacitor
A multifunctional hierarchical Bismuth ferrite/chromium carbide (BiFeO3/Cr2CTx) MXene has been employed as both electrode material for supercapacitors as well as an electrocatalyst for electrocatalytic water splitting. Here, a facile method is suggested for synthesizing Cr2CTx MXene from the chromium aluminum carbide (Cr2AlC) MAX Phase. X-ray diffraction studies, Scanning electron microscopy, and high-resolution transmission electron microscopy indicate that the aluminum atomic layers are removed from Cr2AlC MAX structure. The electrochemical test reveals that the BiFeO3/Cr2CTx MXene composite, which is produced with less Al2O3, performs well in the hydrogen evolution reaction (HER) with a low overpotential of 128 mV in 1 M potassium hydroxide. 53.3 mV dec?1, and 0.16 ? cm?2, respectively, are the values of the calculated Tafel slope and charge transfer resistance. In a dielectrode electrolysis system, BiFeO3/Cr2CTx MXene electrode needs only 1.81 V of cell potential to provide 10 mA cm?2 with long-term stability. The specific capacity of 671.2 C g?1 at a current density of 1 A g?1 is obtained for BiFeO3/Cr2CTx MXene electrode with 90% capacitance retention after 3000 cycles. The potential use of BiFeO3/Cr2CTx MXene towards HER and supercapacitor application is demonstrated by this study, which offers a gentle path for the fabrication of Cr2CTx MXene composites for energy storage and HER applications. 2023 Elsevier Ltd
Reghunath B.S.; K R S.D.; Rajasekaran S.; Saravanakumar B.; William J.J.; Pinheiro D.
https://doi.org/10.1016/j.electacta.2023.142685 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163380755&doi=10.1016%2fj.electacta.2023.142685&partnerID=40&md5=2ec4c22c3b112db317d247c7b330fe1e
Reghunath B.S., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; K R S.D., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India, Department of Physics, Dr. Mahalingam College of Engineering and Technology, Tamilnadu, Pollachi, 642003, India; Rajasekaran S., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Saravanakumar B., Department of Physics, Dr. Mahalingam College of Engineering and Technology, Tamilnadu, Pollachi, 642003, India; William J.J., Department of Physics, Dr. Mahalingam College of Engineering and Technology, Tamilnadu, Pollachi, 642003, India; Pinheiro D., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Co-indices; Hyper Zagreb Indices; Transformation Graphs
The network systems and graphical analysis through the study of structural characteristics is a vast field of growing importance in research. Topological indices have a significant and crucial role in the study of structureproperty relationships. In this paper, we examine constructional transformed networks constructed by unique vertex-edge incidence and mutual adjacency associations. Expressions for the first and second hyper Zagreb indices and co-indices of these transformed networks and their complements are obtained. 2023, RAMANUJAN SOCIETY OF MATHEMATICS AND MATHEMATICAL SCIENCES. All rights reserved.
South East Asian Journal of Mathematics and Mathematical Sciences, Vol-19, No. 2, pp. 179-202.
RAMANUJAN SOCIETY OF MATHEMATICS AND MATHEMATICAL SCIENCES
https://doi.org/10.56827/SEAJMMS.2023.1902.13 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194821465&doi=10.56827%2fSEAJMMS.2023.1902.13&partnerID=40&md5=70bb36ae4dead66d2ea20736f35d9ef1
Sarkar I., Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Nanjappa M., School of Engineering and Technology, CHRIST (Deemed to be University), Bengaluru, 560074, India; Gutman I., Faculty of Science, University of Kragujevac, Kragujevac, 34000, Serbia
Microwave assisted structural engineering on efficient eco-friendly natural dye alizarin for dye sensitized solar cells application
DFT; Dye sensitized solar cells; Fluorescence quenching; HOMO-LUMO; Photoinduced electron transfer
The novel eco-friendly natural dyes, (9E, 10E), ? 9, 10-bis(2-(4-nitrobenzylidene) hydrazono) ? 9,10 dihydroanthracene-1,2-diol (NHA) have been synthesised using the one-pot microwave-assisted solvent evaporation method, and physicochemical characterizations were carried out using 1H NMR, 13C NMR, GC-MS, and FT-IR data. The photophysical properties of NHA dye were determined using experimental and theoretical techniques. The Stoke's shift shows a large bathochromic shift in polar solvents, which is due to the ??? * transition. The ground-state optimization of NHA dye was carried out using density functional theory (DFT) with the B3LYP/631 G level basis set. The HOMO-LUMO and energy band gap values computed from density functional theory and absorption threshold wavelengths are good agreement with each other. Further, the effect of TiO2 nanoparticles on NHA dye has been studied using spectroscopic and electrochemical techniques. It was observed that, NHA dye showed fluorescence quenching in the presence of TiO2 NPs, which is due to the photo induced electron transfer process. The apparent association constant of the interaction between NHA dye and TiO2 nanoparticles is also calculated using the Benesi-Hildebrand model. The Rehm-Weller relation infers that thermodynamically favourable electron transfer takes place between dyes and TiO2 NPs. Further, the solar cell was constructed using NHA dye as a sensitizer, and the photovoltaic conversion efficiency was found to be 1.16%. 2023 Elsevier GmbH
Walki S.; Madar M.; Suresha S.; Kalarakoppa K.; Shetty V.R.; Refat M.S.; Alsuhaibani A.M.; Al-Humaidi J.Y.; Savanur H.M.; Naik L.
https://doi.org/10.1016/j.ijleo.2023.171090 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164675977&doi=10.1016%2fj.ijleo.2023.171090&partnerID=40&md5=128e73fe91a236a591cc02ccc42c5073
Walki S., Department of Chemistry, Hirasugar Institute of Technology, Karnataka, Nidasosi, 591236, India; Madar M., V.M.K.S.R. Vastrad Arts, Science and V.S. Bellihal Commerce College, Karnataka, Hungud, 587118, India; Suresha S., Department of Physics, Government Science College Santhebennur, Karnataka, 577552, India; Kalarakoppa K., Department of Physics, Karnatak Science College, Karnataka, Dharwad, 560041, India; Shetty V.R., Department of Chemistry, NMKRV College for Womens, Jayanagar, Karnataka, Bengaluru, 577451, India; Refat M.S., Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia; Alsuhaibani A.M., Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia; Al-Humaidi J.Y., Department of Chemistry College of Science Princess Nourah bint Abdulrahman University, P.O. BOX 84428, Riyadh, 11671, Saudi Arabia; Savanur H.M., Post Graduate Department of Studies and Research in Chemistry, P. C. Jabin Science College, Karnataka, Hubballi, 580021, India; Naik L., Department of Physics and Electronics, CHRIST University, Central Campus, Karnataka, Bengaluru, 560029, India
Primordial Planets with an Admixture of Dark Matter Particles and Baryonic Matter
baryonic admixture; dark matter; DM; early universe; primordial planets
It has been suggested that primordial planets could have formed in the early universe and the missing baryons in the universe could be explained by primordial free-floating planets of solid hydrogen. Many such planets were recently discovered around the old and metal-poor stars, and such planets could have formed in early epochs. Another possibility for missing baryons in the universe could be that these baryons are admixed with DM particles inside the primordial planets. Here, we discuss the possibility of the admixture of baryons in the DM primordial planets discussed earlier. We consider gravitationally bound DM objects with the DM particles constituting them varying in mass from 20 to100 GeV. Different fractions of DM particles mixed with baryonic matter in forming the primordial planets are discussed. For the different mass range of DM particles forming DM planets, we have estimated the radius and density of these planets with different fractions of DM and baryonic particles. It is found that for heavier-mass DM particles with the admixture of certain fractions of baryonic particles, the mass of the planet increases and can reach or even substantially exceed Jupiter mass. The energy released during the process of merger of such primordial planets is discussed. The energy required for the tidal breakup of such an object in the vicinity of a black hole is also discussed. 2023 by the authors.
https://doi.org/10.3390/universe9090401 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85172133967&doi=10.3390%2funiverse9090401&partnerID=40&md5=9a03d139c2901ba7c4e7d9dcee8578e7
Kiren O.V., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India, Department of Physics, St Claret PU College, Bangalore, 560013, India; Kenath A., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Sivaram C., Indian Institute of Astrophysics, Bangalore, 560034, India
Optimization of Flexible Manufacturing Production Line System Based on Digital Twin
Digital twin; Effectiveness; Manufacturing systems; Optimization; Production capacity
This research presents a revolutionary Digital Twin (DT)driven method aimed at quick customization of computerized industrial processes. The DT includes dual components, the semi-physical replication that transfers system information and gives data input to the subsequent clause, which is enhanced. The outcomes of the optimum section are returned directly to the semi-physical replication used for validation. The term Open-Architecture Machine Tool (OAMT) led to a fundamental class of machine tools that consists of a basic unified platform and many individually designed modules that may be quickly added or replaced away. Designers can dynamically modify the production system for responding to process planning by inserting personalized components into its OAMTs. Major enabling approaches, along with how to identical virtual and substantial systems and how to instantly bi-level program the invention size and efficiency of developed structures to accommodate sudden variations of goods, are explained. A real execution is done to demonstrate the efficacy of the method to achieve increased enactment of the system by minimizing the overhead cost of the recompose method by systematizing and quickly enhancing it. 2023, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.
Ramkumar G.; Misra S.; Babu G.R.; Gottimukkala A.R.; Siddi S.; Kumar J.S.
Ramkumar G., Department of Commerce, School of Commerce, Finance and Accountancy, Christ University, Karnataka, Bangalore, India; Misra S., Birla Global University, Odisha, Bhubaneswar, India; Babu G.R., Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Nizampet (S.O), Telangana, Hyderabad, 500090, India; Gottimukkala A.R., Department of Computer Science and Engineering, Koneru Lakshmaiah Educationa Foundation, Green Fields, Vaddeswaram, Andhra Pradesh, Guntur, 522302, India; Siddi S., Department of Mathematics, St. Martins Engineering College, Kompally, Telangana, Secunderabad, India; Kumar J.S., Department of Mechanical Engineering, MLR Institute of Technology, Hyderabad, India
Broadband near infrared emission in Cr3+: Cs2AgBiCl6 double perovskite halides
Double perovskites; Electron density analysis; Near infra-red phosphors; Transition metals doped phosphors
Near Infra-red phosphors with broad emission band, high thermal stability and excellent efficiency are required in various bioimaging applications. In this study, we report the design and chemical reflux synthesis of a new family of Cr3+: Cs2AgBiCl6 double perovskites. In detail this article focuses on the impact of Cr3+ doping on the crystal structure, optical and vibrational properties of Cs2AgBiCl6 double perovskites. Different concentrations of Cr3+ doped Cs2AgBiCl6 double perovskites were analyzed using UVVisible, Raman, Photoluminescence (PL), PL excitation, time resolved PL, X-ray photoelectron spectroscopy. Morphological analyses were carried out using scanning and transmission electron microscopies. XRD spectra reveals that the cubic symmetry remains unaltered upon Cr3+ doping. Raman and Rietveld analysis show that the BiCl bond decreases upon Cr3+ incorporation. Optical absorption studies reveal a decrease in bandgap from 2.76 to 2.66 eV upon Cr3+ doping. PL spectroscopy of Cr 3+:Cs2AgBiCl6 exhibits a broad near infrared (NIR) emission band at 973 nm with an FWHM of 186 nm at 355 nm excitation. This demonstrates the promising prospects for NIR light emitting diode and bioimaging applications of Cr3+:Cs2AgBiCl6 double perovskites. 2023 Elsevier B.V.
Jeevaraj M.; Sivaganesh D.; Saravanakumar S.; Bahadur S.A.; Sudhahar S.; Kumar M.K.
https://doi.org/10.1016/j.optmat.2023.114294 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85172209580&doi=10.1016%2fj.optmat.2023.114294&partnerID=40&md5=fbe98650acb06a4284db24076ac81650
Jeevaraj M., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to be University), Tamil Nadu, Krishnankoil, 626 126, India; Sivaganesh D., Department of Physical Techniques and Devices for Quality Control, Ural Federal University, Yekaterinburg, 620 002, Russian Federation; Saravanakumar S., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to be University), Tamil Nadu, Krishnankoil, 626 126, India; Bahadur S.A., Department of Physics, Kalasalingam Academy of Research and Education (Deemed to be University), Tamil Nadu, Krishnankoil, 626 126, India; Sudhahar S., Department of Physics, Alagappa University, Tamil Nadu, Karaikudi, 630 003, India; Kumar M.K., Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560 029, India
BrinkmanBard Convection with Rough Boundaries and Third-Type Thermal Boundary Conditions
asymptotic analysis; Biot number; BrinkmanBard convection; DarcyRayleigh number; generalized Lorenz model; Maclaurin series; Robin boundary condition; rough boundaries; slip Darcy number
The BrinkmanBard convection problem is chosen for investigation, along with very general boundary conditions. Using the Maclaurin series, in this paper, we show that it is possible to perform a relatively exact linear stability analysis, as well as a weakly nonlinear stability analysis, as normally performed in the case of a classical free isothermal/free isothermal boundary combination. Starting from a classical linear stability analysis, we ultimately study the chaos in such systems, all conducted with great accuracy. The principle of exchange of stabilities is proven, and the critical Rayleigh number, (Formula presented.), and the wave number, (Formula presented.), are obtained in closed form. An asymptotic analysis is performed, to obtain (Formula presented.) for the case of adiabatic boundaries, for which (Formula presented.). A seemingly minimal representation yields a generalized Lorenz model for the general boundary condition used. The symmetry in the three Lorenz equations, their dissipative nature, energy-conserving nature, and bounded solution are observed for the considered general boundary condition. Thus, one may infer that, to obtain the results of various related problems, they can be handled in an integrated manner, and results can be obtained with great accuracy. The effect of increasing the values of the Biot numbers and/or slip Darcy numbers is to increase, not only the value of the critical Rayleigh number, but also the critical wave number. Extreme values of zero and infinity, when assigned to the Biot number, yield the results of an adiabatic and an isothermal boundary, respectively. Likewise, these extreme values assigned to the slip Darcy number yield the effects of free and rigid boundary conditions, respectively. Intermediate values of the Biot and slip Darcy numbers bridge the gap between the extreme cases. The effects of the Biot and slip Darcy numbers on the HopfRayleigh number are, however, opposite to each other. In view of the known analogy between Bard convection and TaylorCouette flow in the linear regime, it is imperative that the results of the latter problem, viz., BrinkmanTaylorCouette flow, become as well known. 2023 by the authors.
Siddheshwar P.G.; Narayana M.; Laroze D.; Kanchana C.
https://doi.org/10.3390/sym15081506 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168920179&doi=10.3390%2fsym15081506&partnerID=40&md5=eb92adebdcb72fd9c088f09536177206
Siddheshwar P.G., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Narayana M., Department of Mathematics, The University of the West Indies, Mona Campus, 7, Kingston, Jamaica; Laroze D., Instituto de Alta Investigaci, Universidad de Tarapac Casilla 7 D, Arica, 1000000, Chile; Kanchana C., Instituto de Alta Investigaci, Universidad de Tarapac Casilla 7 D, Arica, 1000000, Chile
Star formation in a massive spiral galaxy with a radio-AGN
Galaxies: active; Galaxies: evolution; Galaxies: jets
We present an analysis of new VLT/MUSE optical imaging spectroscopic data of 2MASX J23453268-0449256 (J2345-0449), a nearby (z = 0:0755) massive (Mstellar = 4*1011 M) spiral galaxy. This is a particularly interesting source for a study of active galactic nucleus (AGN) feedback since it hosts two pairs of bright, giant radio jets and a massive, luminous X-ray halo, but it has no massive bulge. The galaxy has a 24 kpc wide ring of molecular gas, and a source-averaged star formation rate that is factors 30 to 70 lower than expected from the Kennicutt-Schmidt law. With MUSE, we have analyzed the stellar continuum and bright optical line emission and have constrained the spatially resolved past and present star formation on scales of approximately 1 kpc. More than 93% of the stellar mass formed ?10 Gyrs ago including in the disk. Optical emission from the AGN is very faint and contributes 2% of the continuum around the nucleus at most. Most line emission is predominantly excited by shocks and old stellar populations except in 13 young star-forming regions that formed ?11 Myrs ago, of which only seven are associated with the molecular ring (the others are at larger radii). They avoid a region of high electron densities aligned with the radio source, and form stars at efficiencies that are comparable to those in normal spiral galaxies. We discuss the implications of our findings for the regulation of star formation in galaxies through AGN feedback in the absence of competing mechanisms related to the presence of a massive stellar bulge, such as morphological quenching. The Authors 2023.
Drevet Mulard M.; Nesvadba N.P.H.; Meenakshi M.; Mukherjee D.; Wagner A.; Bicknell G.; Neumayer N.; Combes F.; Zovaro H.; Janssen R.M.J.; Bagchi J.; Dabhade P.; Prunet S.
All Open Access; Green Open Access; Hybrid Gold Open Access
Drevet Mulard M., Universitde la Ce d'Azur, Observatoire de la Ce d'Azur, Cnrs, Laboratoire Lagrange, Bd de l'Observatoire, CS 34229, Nice, cedex 4 06304, France; Nesvadba N.P.H., Universitde la Ce d'Azur, Observatoire de la Ce d'Azur, Cnrs, Laboratoire Lagrange, Bd de l'Observatoire, CS 34229, Nice, cedex 4 06304, France; Meenakshi M., Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune, 411007, India; Mukherjee D., Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Pune, 411007, India; Wagner A., University of Tsukuba, Center for Computational Sciences, Tennodai 1-1-1, Ibaraki, Tsukuba, 305-0006, Japan; Bicknell G., Research School of Astronomy and Astrophysics, Australian National University, Canberra, 2611, ACT, Australia; Neumayer N., Max-Planck Institut f Astronomie, Kigstuhl 17, Heidelberg, 69117, Germany; Combes F., Observatoire de Paris, Lerma, Colle de France, Cnrs, Psl University, Sorbonne University, Paris, France; Zovaro H., Research School of Astronomy and Astrophysics, Australian National University, Canberra, 2611, ACT, Australia; Janssen R.M.J., Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, 91109, CA, United States, Department of Astronomy, California Institute of Technology, 1216 E California Blvd., Pasadena, 91125, CA, United States; Bagchi J., Department of Physics & Electronics, Christ (Deemed to Be University), Hosur Road, Bengaluru, 560029, India; Dabhade P., Observatoire de Paris, Lerma, Colle de France, Cnrs, Psl University, Sorbonne University, Paris, France; Prunet S., Universitde la Ce d'Azur, Observatoire de la Ce d'Azur, Cnrs, Laboratoire Lagrange, Bd de l'Observatoire, CS 34229, Nice, cedex 4 06304, France
Bacillus velezensis-synthesized silver nanoparticles and its efficacy in controlling the Aedes aegypti
Aedes aegypti; antioxidant; Bacillus velezensis; gas chromatographymass spectrometry; larvicidal; Poecilia reticulata
Abstract: Dengue fever and dengue haemorrhagic fever are diseases that do not have any potential medications. The severity of these diseases is fatal and thus poses a severe threat to mankind. Aedes aegypti is the vector that carries and spreads the dengue virus. Therefore, controlling the development and population of mosquitoes is crucial. Many insecticides and other strategies of control have not become successful in their purpose. Therefore, establishing potential compounds that are environmentally safe and productive in inhibiting the growth of mosquitoes is still to be acquired. Bacillus velezensis (MW219533) was utilized in the synthesis of silver nanoparticles with silver nitrate as the metal ion source. The silver nanoparticles were characterized and confirmed using UVvisible spectrometry that indicated a peak at 421 nm. Further analytical measurements such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray analysis confirmed the presence of crystalline, cylindrical-shaped silver nanoparticles of size 5659 nm. The LC50 was found to be 581.39, 616.37, 760.93, 801.94 and 867.66 g l?1 when tested against the five developmental stages of Aedes aegypti, such as first instar, second instar, third instar, fourth instar stages of larvae and pupae, respectively. The predatory efficacy of Poecilia reticulata was calculated with exposure to silver nanoparticles. Our study aims on developing an environmentally safe and economical approach to reduce the development of mosquitoes in the environment. The work signifies the biological method towards controlling the larvae and pupae stages of A. aegypti as well as to mark its safety at the aquatic level of the life cycle that leaves no traces of pollution on the environment. Graphical abstract: [Figure not available: see fulltext.] 2023, Indian Academy of Sciences.
Bulletin of Materials Science, Vol-46, No. 3
George J.A., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, 560029, India; Paari K.A., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, 560029, India
Solvent-solute polarity, electrophilic, steric effects, reactive sites, themodynamic quantities discussion and biological evaluation of lung cancer antiproliferative activities of spirobrassinin derivatives
ADME; DFT; Docking; Lung cancer; Topology
The current study of spirobrassinin and its related compounds, 1-methoxyspirobrassinol and the 5-bromo analogue of methoxyspirobrassinin is performed to reveal a comparison among these molecules to understand which is the most reactive and bioactive. DFT (Density Functional Theory) studies comprising geometry optimisation (energy minimisation), FMO (Frontier Molecular Orbital) Analysis, theoretical UV analysis, NLO (Non-Linear Optics), NBO (Natural Bond Orbital) and thermodynamics studies are performed using Gaussian 09W. IEFPCM model is employed to investigate the solvent effect on the reactivity and stability of the title compounds. ADME profiles are generated using SwissADME, PreADMET and ADMETLab 2.0. Interesting lung cancer target proteins are docked with the title compounds is finally performed to obtain insight into the molecules' anticancer potential. 2023 Elsevier B.V.
Parakkal S.C.; Muthu S.; Datta R.; Kadaikunnan S.; Abbas G.
https://doi.org/10.1016/j.molliq.2023.122382 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163476930&doi=10.1016%2fj.molliq.2023.122382&partnerID=40&md5=d87a4928c5a40738e95aa9d012f201d0
Parakkal S.C., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560 029, India; Muthu S., Department of Physics, Arignar Anna Govt. Arts College, Tamil Nadu, Cheyyar 604 407, India; Datta R., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560 029, India; Kadaikunnan S., Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Abbas G., Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr 15, Karlsruhe, 76131, Germany
Comparing Influence of Depression and Negative Affect on Decision Making
Balloon Analog Risk Task; Depression; Iowa Gambling Task; Mood induction; Value-based decision making
The current study aimed to explore differential value-based decision-making patterns across three groupsindividuals diagnosed with mild-to-moderate depression, a healthy matched control group, and a negative mood induction group. In the current study, drug- and therapy-nae individuals diagnosed with first episode of mild-to-moderate depression (n = 40), healthy individuals matched on age, gender, and education (n = 40), and healthy individuals with no current, past, or family history of any psychiatric conditions in a negative mood-induced state (n = 40) were administered the IOWA Gambling Task (IGT) and the Balloon Analog Risk Task (BART). Results indicated that individuals with depression showed heightened punishment sensitivity on both the IGT and the BART (p < 0.05 on the BART and p < 0.05 on the IGT), andperformed poorly on the IGT indicating poor and slow learning (p < 0.01). A similar, less severe, pattern was observed in the negative mood induction group. Individuals with mild-to-moderate depression performed poorly on tasks of value-based decision making. The significance of process factors in decision making, such as reward and punishment sensitivity, valuation of outcomes and learning, was highlighted in this study. The study also demonstrated how a negative affective state, without the other clusters of depressive symptomatology, can also lead to a less severe, but impaired decision making. 2023, The Author(s) under exclusive licence to National Academy of Psychology (NAOP) India.
Psychological Studies, Vol-68, No. 3, pp. 310-318.
Moosath H., Department of Psychology, CHRIST (Deemed to be University), Karnataka, Bangalore, India; Rangaswamy M., Department of Psychology, CHRIST (Deemed to be University), Karnataka, Bangalore, India
Some New Results on ?(k) -Coloring of Graphs
bad edges; Improper coloring; near proper coloring; ?(k) -coloring
Let ? be the minimum number of distinct resources or equipment such as channels, transmitters, antennas and surveillance equipment required for a system's stability. These resources are placed on a system. The system is stable only if the resources of the same type are placed far away from each other or, in other words, they are not adjacent to each other. Let these distinct resources represent different colors assigned on the vertices of a graph G. Suppose the available resources, denoted by k, are less than ?. In that case, placing k resources on the vertices of G will make at least one equipment of the same type adjacent to each other, which thereby make the system unstable. In ?(k)-coloring, the adjacency between the resources of a single resource type is tolerated. The remaining resources are placed on the vertices so that no two resources of the same type are adjacent to each other. In this paper, we discuss some general results on the ?(k)-coloring and the number of bad edges obtained from the same for a graph G. Also, we determine the minimum number of bad edges obtained from ?(k)-coloring of few derived graph of graphs. The number of bad edges which result from a ?(k)-coloring of G is denoted by bk(G). 2023 World Scientific Publishing Company.
Ellumkalayil M.T.; Samuel L.C.; Naduvath S.
Journal of Interconnection Networks, Vol-23, No. 3
Ellumkalayil M.T., School of Sciences, Christ University, Delhi NCR, 201003, India; Samuel L.C., Department of Computer Science, Dasve Lavasa, Mulshi, Pune, India; Naduvath S., Department of Mathematics, Christ University, Bangalore, India
Robust Bidirectional Long Short-Term Memory-Based Class Imbalance Handling in Dyslexia Prediction at its Early Stage
Bidirectional long short-term memory; Class imbalance; Deep learning; Dyslexia; Hyperparameter; Machine learning; Neurological disorder; Red Fox optimization
Dyslexia is a neurological condition that presents difficulties and obstacles in learning, particularly in reading. Early diagnosis of dyslexia is crucial for children, as it allows the implementation of appropriate resources and specialized software to enhance their skills. However, the evaluation process can be expensive, time-consuming, and emotionally challenging. In recent years, researchers have turned to machine learning and deep learning techniques to detect dyslexia using datasets obtained from educational and healthcare institutions. Despite the existence of several deep learning models for dyslexia prediction, the problem of handling class imbalance significantly impacts the accuracy of detection. Therefore, this study proposes a robust deep learning model based on a variant of long short-term memory (LSTM) to address this issue. The advantage of Bidirectional LSTM, which has the ability to traverse both forward and backward, improves the pattern of understanding very effectively. Still, the problem of assigning values to the hyper-parameters in BLSTM is the toughest challenge which has to be assigned in a random manner. To overcome this difficulty, the proposed model induced a behavioral model known as Red Fox Optimization algorithm (RFO). Based on the inspiration of red fox searching behavior, this proposed work utilized the local and the global search in assigning and fine-tuning the values of hyper-parameters to handle the class imbalance in dyslexia dataset. The performance evaluation is conducted using two different dyslexia datasets (i.e., dyslexia 12_14 & real-time dataset). The simulation results explore that the proposed robust Bidirectional Long Short-Term Memory accomplishes the highest detection rate with reduced error rate compared to other deep learning models. 2023, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.
Zeema J.L.; Thirunavukkarasu V.; Sivabalan R.V.; Christopher D.F.X.
Zeema J.L., Department of Computer Science, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Thirunavukkarasu V., Department of Computer Science, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Sivabalan R.V., Department of Computer Science, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Christopher D.F.X., SRM Trichy Arts and Science College, Tamil Nadu, Tiruchirappalli, India
Theoretical Prediction of the Number of B&#xE9;nard Cells in Low-Porosity Cylindrical/Rectangular Enclosures Saturated by a Fast Chemically Reacting Fluid
B&#xE9;nard cells; chemically reactive fluid; cylindrical and rectangular enclosures; Darcy&#x2013;B&#xE9;nard convection; linear stability analysis
Many applications including chemical engineering and meteorology require the study of a chemically driven convection in cylindrical, as well as rectangular enclosures. The present paper reports a unified analysis of a chemically driven convection in densely packed porous cylindrical/rectangular enclosures saturated by a chemically reactive binary fluid mixture. Employing the degeneracy technique and the single-term Galerkin method involving Bessel functions in a linear stability analysis, an analytical expression for the critical Rayleigh number, (Formula presented.), was obtained. An analytical expression for the number of cells that manifest in a given enclosure, at the onset of convection, was derived from (Formula presented.). The connection between the stabilizing and destabilizing effects of various parameters and the size or the number of B&#xE9;nard cells that manifest are described in detail. The results depicted that the chemical parameters related to the heat of reaction destabilize and the parameter depending inversely on the rate of the chemical reaction stabilizes the system. In the latter case, a greater number of smaller cells were formed in the system compared to the former case. Hence, we concluded that the chemically reactive fluid advances the onset of convection compared to the chemically non-reactive fluid. The results of a similar problem in rectangular enclosures of infinite horizontal extent and chemically non-reactive liquid-saturated porous medium were recovered as limiting cases. Thus, the present model presents a unified analysis of six individual problems. 2023 by the authors.
Lakshmi K.M.; P&#xE9;rez L.M.; Siddheshwar P.G.; Laroze D.
Sustainability (Switzerland), Vol-15, No. 15
https://doi.org/10.3390/su151511999 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167923345&doi=10.3390%2fsu151511999&partnerID=40&md5=feb4aeb26b46eb2c20e159393f91840d
Lakshmi K.M., Department of Mathematics, School of Physical Sciences, Central University of Karnataka, Kalaburagi, 585367, India; P&#xE9;rez L.M., Departamento de F&#x00ED;sica, FACI, Universidad de Tarapac&#x00E1;, Casilla 7D, Arica, 1000000, Chile; Siddheshwar P.G., Centre for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India; Laroze D., Instituto de Alta Investigaci&#x00F3;n, Universidad de Tarapac&#x00E1;, Casilla 7D, Arica, 1000000, Chile