Data Security-Based Routing in MANETs Using Key Management Mechanism
Cryptosystems; Key management; MANET; Routing; Security
A Mobile Ad Hoc Network (MANET) is an autonomous network developed using wireless mobile nodes without the support of any kind of infrastructure. In a MANET, nodes can communicate with each other freely and dynamically. However, MANETs are prone to serious security threats that are difficult to resist using the existing security approaches. Therefore, various secure routing protocols have been developed to strengthen the security of MANETs. In this paper, a secure and energy-efficient routing protocol is proposed by using group key management. Asymmetric key cryptography is used, which involves two specialized nodes, labeled the Calculator Key (CK) and the Distribution Key (DK). These two nodes are responsible for the generation, verification, and distribution of secret keys. As a result, other nodes need not perform any kind of additional computation for building the secret keys. These nodes are selected using the energy consumption and trust values of nodes. In most of the existing routing protocols, each node is responsible for the generation and distribution of its own secret keys, which results in more energy dissemination. Moreover, if any node is compromised, security breaches should occur. When nodes other than the CK and DK are compromised, the entire networks security is not jeopardized. Extensive experiments are performed by considering the existing and the proposed protocols. Performance analyses reveal that the proposed protocol outperforms the competitive protocols. 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Bondada P.; Samanta D.; Kaur M.; Lee H.-N.
Applied Sciences (Switzerland), Vol-12, No. 3
https://doi.org/10.3390/app12031041 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123072877&doi=10.3390%2fapp12031041&partnerID=40&md5=71874d32521da631520521b3176ffbb6
Bondada P., Dayananda Sagar Research Foundation, University of Mysore (UoM), Mysuru, 570005, India; Samanta D., Dayananda Sagar Research Foundation, University of Mysore (UoM), Mysuru, 570005, India, Department of Computer Science, CHRIST University, Bangalore, 560029, India; Kaur M., Gwangju Institute of Science and Technology, School of Electrical Engineering and Computer Science, Gwangju, 61005, South Korea; Lee H.-N., Gwangju Institute of Science and Technology, School of Electrical Engineering and Computer Science, Gwangju, 61005, South Korea
Modified PredictorCorrector Method for the Numerical Solution of a Fractional-Order SIR Model with 2019-nCoV
Caputo derivative; Coronavirus; Epidemic mathematical model; Fractional predictorcorrector method
In this paper, we analyzed and found the solution for a suitable nonlinear fractional dynamical system that describes coronavirus (2019-nCoV) using a novel computational method. A compartmental model with four compartments, namely, susceptible, infected, reported and unreported, was adopted and modified to a new model incorporating fractional operators. In particular, by using a modified predictorcorrector method, we captured the nature of the obtained solution for different arbitrary orders. We investigated the influence of the fractional operator to present and discuss some interesting properties of the novel coronavirus infection. 2022 by the authors. Licensee MDPI, Basel, Switzerland.
Gao W.; Veeresha P.; Cattani C.; Baishya C.; Baskonus H.M.
https://doi.org/10.3390/fractalfract6020092 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124195730&doi=10.3390%2ffractalfract6020092&partnerID=40&md5=4480fd30c6d91ad9973ace43009998ba
Gao W., School of Information Science and Technology, Yunnan Normal University, Kunming, 650092, China; Veeresha P., Center for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Cattani C., Engineering School (DEIM), Tuscia University, Viterbo, 01100, Italy; Baishya C., Department of Studies and Research in Mathematics, Tumkur University, Tumkur, 572103, India; Baskonus H.M., Department of Mathematics and Science Education, Faculty of Education, Harran University, Sanliurfa, 63100, Turkey
EXAMINING THE IMPACT OF IMPOSTOR PHENOMENON ON PSYCHOLOGICAL WELL-BEING AND PERCEIVED SOCIAL SUPPORT AMONG GRADUATE STUDENTS
impostor phenomenon; impostor syndrome; perceived social support; psychological well-being
Background: The mounting pressure to pursue novel endeavours, excel in academics and extracurriculars, improper mentoring, and looming deadlines have primarily been responsible for graduate students succumbing to the cut-throat competition prevalent in universities. In trying to keep up with the growing expectations, they may experience Impostor Phenomenon, which is often accompanied by feelings of unwarranted inadequacy and intellectual fraudulence-where students constantly question their capabilities despite evident success. Attributing their accomplishments to a stroke of luck, they believe they are not worthy of praise. These experiences of impostor phenomenon end up exacting a heavy toll on the mental well-being of graduate students and subsequently, their perceptions of available sources of social support. Purpose: In this context, the present investigation attempts to explore the impact of impostor phenomenon on psychological well-being and perceived social support among Indian graduate students; and analyze the gender differences in the experiences of impostor phenomenon. Design/Methodology/Approach: The sample consisted of 230 Indian graduate students (115 males and 115 females) aged 18-25 years, who had academic scores equivalent to, or above, 65%. Purposive sampling technique was employed to gather data using the Clance Impostor Phenomenon Scale, Ryffs Psychological Well-Being Scale, and the Multidimensional Scale of Perceived Social Support. Findings: Results of the study yielded that Impostor Phenomenon is a significant negative predictor of Psychological Well-Being, however no significant relationship was established with Perceived Social Support. No significant gender differences emerged from the data analysis. Conclusion: The results can be utilized heuristically to facilitate the identification of graduate students experiencing impostor phenomenon, provide early interventions, and prevent the culmination of the same into psychopathology, thus enriching the literature on this lesser-known phenomenon in an Indian context. 2022 RJ4All.
Youth Voice Journal, Vol-1, No. Special Issue, pp. 53-65.
Narain S., Christ (Deemed to be University), Delhi NCR, India; Mukherjee S., Centre for Behavioural and Cognitive Sciences (CBCS) on a Dyslexia project, India
Understanding Startup Valuation and its Impact on Startup Ecosystem
growth; profitability; startup; startup ecosystem; unicorn; valuation; venture capitalist
Startups play a substantial role in the economic growth of a nation, by introducing new technologies, ground-breaking innovation, creating jobs, etc. A couple of decades back, it was extremely difficult to start a business, but today new businesses pop up every day, all around the world. Recognizing the importance of a startup, governments across the globe are doing their best to provide an atmosphere where startups can bloom. Despite its importance and all the support, the startup failure rate is at 90%; about 10% of startups fail in the first year and 70% fail in two to five years. The startup boom saw the emergence of alternative sources of funding like Venture Capitalist, Angel Investors, etc. These investors (Venture Capitalist, Angel Investors, etc.) played a crucial role in startup success by providing easy access to funds which is a critical and scarce resource for any founder. Traditionally business success is linked with sustainable profitability but in the startup world most used method to define success is valuation. Based on CB Insights research, as of January 2022, there are more than 900 unicorns (startup with a valuation of over $1 billion) around the world and of these unicorns less than 10% are profitable. It's difficult to explain/comprehend how startups' which are neither profitable nor foresee profitability in near future are valued higher than traditional business with stable profitability. Current valuation methods have impacted the startup ecosystem. Today, founders start their business with exit in mind, the focus of founders is on growth/scale rather than profitability. There is a school of thought that believes that such valuations will soon result in the bursting of the startup bubble just like the dotcom bubble seen in late 1990s. The focus of this paper is to investigate the techniques used by investors for startup valuation and how these techniques are impacting the startup ecosystem and its founders. The paper looks at all stages of the investment cycle, from seed to IPO or takeover and understands the process of valuation at each stage and how it impacts all stakeholders in the ecosystem. 2022 Walter de Gruyter GmbH, Berlin/Boston.
Journal of Business Valuation and Economic Loss Analysis, Vol-17, No. 1, pp. 101-114.
https://doi.org/10.1515/jbvela-2022-0020 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85142258211&doi=10.1515%2fjbvela-2022-0020&partnerID=40&md5=27dd0efc3f722abd3b8f5401a2fda23a
Menon R., Christ University, Bengaluru, 560100, India; James L., Christ University, Bengaluru, 560100, India
Development of Guidelines for Spouses Engaged in Home-Based Care of Persons With Motor Neuron Disease From Indian Context
guidelines; home-based care; interpretative phenomenological analysis; motor neuron disease; spouse caregivers
Background: The caregivers of persons with motor neuron disease (MND) have several needs that are usually not voiced on any platform. Aim: To explore the lived experience of spouses of persons with MND, identify their needs and develop guidelines for better home-based care. Method: An exploratory study with 3-point in-depth interviews among 13 participants was conducted. Participants were the spouses of persons with MND under treatment at a national quaternary referral center. The interpretative phenomenological analysis identified participants needs. These needs, with literature review synthesis, guided the drafting of guidelines, which was validated by experts. Results: The needs were emotional, social, care systems, and skills. The guidelines developed contained 2 sections (1) Information for the spouses: understanding MND, communication, symptom management, marital relationship, palliative care, and everyday life made easier. (2) Well-being of the spouse caregivers: well-being of the spouse caregivers, self-care, mental health, supporting carers in palliative care, where to find help. Conclusion: The guidelines can be developed as a manual for the caregivers and for training healthcare professionals working with neurodegenerative conditions. The Author(s) 2022.
Warrier M.G.; Thomas P.T.; Sadasivan A.; Nashi S.; Vengalil S.; Nalini A.
Warrier M.G., Department of Psychology, Christ University, Bangalore, India; Thomas P.T., Department of Psychiatric Social Work, NIMHANS, Bangalore, India; Sadasivan A., Sampurna Montfort College, Bangalore, India; Nashi S., Department of Neurology, NIMHANS, Bangalore, India; Vengalil S., Department of Neurology, NIMHANS, Bangalore, India; Nalini A., Department of Neurology, NIMHANS, Bangalore, India
Green synthesis of reduced graphene oxide using Plectranthus amboinicus leaf extract and its supercapacitive performance
graphene oxide; Green synthesis; Plectranthus amboinicus; reduced graphene oxide; supercapacitive performance
A rapid, efficient, green and eco-friendly approach for the preparation of reduced graphene oxide (rGO) using Plectranthus amboinicus (Indian borage) leaves extract (PAE) is explored in this study. The improvement in the reduction process was studied by varying the concentration of graphene oxide (GO), temperature and time duration. The physical and chemical properties of rGO are studied using Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction (XRD) and field emission scanning electron microscope. The result obtained from XRD analysis confirms the removal of an oxygen-containing functional group of GO significantly by PAE. Raman analysis showed a higher ID/IG ratio for rGO (1.297) than GO (1.07), which indicates a higher level of disorder in the rGO with a decrease in the average size of the sp2 domain. From the electrochemical studies, a significant specific capacitance of 92.05Fg1 (5mVs1) is obtained from the cyclic voltammetry (CV) curves and 73.20Fg1 (0.1Ag1) from the galvanostatic chargedischarge (GCD) curve. 2021, Indian Academy of Sciences.
Dominic R.M.; Punniyakotti P.; Balan B.; Angaiah S.
Bulletin of Materials Science, Vol-45, No. 1
Dominic R.M., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India, Department of Chemistry, Christ (Deemed to be University), Bengaluru, 560029, India; Punniyakotti P., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India; Balan B., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India; Angaiah S., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India
Morphological and Elemental Investigations on CoFeBO Thin Films Deposited by Pulsed Laser Deposition for Alkaline Water Oxidation: Charge Exchange Efficiency as the Prevailing Factor in Comparison with the Adsorption Process
Coatings; Electrocatalysis; Hierarchical; Nanostructured; Water oxidation
Abstract: Mixed transition-metals oxide electrocatalysts have shown huge potential for electrochemical water oxidation due to their earth abundance, low cost and excellent electrocatalytic activity. Here we present CoFeBO coatings as oxygen evolution catalyst synthesized by Pulsed Laser Deposition (PLD) which provided flexibility to investigate the effect of morphology and structural transformation on the catalytic activity. As an unusual behaviour, nanomorphology of 3D-urchin-like particles assembled with crystallized CoFe2O4 nanowires, acquiring high surface area, displayed inferior performance as compared to coreshell particles with partially crystalline shell containing boron. The best electrochemical activity towards water oxidation in alkaline medium with an overpotential of 315 mV at 10 mA/cm2 along with a Tafel slope of 31.5 mV/dec was recorded with coreshell particle morphology. Systematic comparison with control samples highlighted the role of all the elements, with Co being the active element, boron prevents the complete oxidation of Co to form Co3+ active species (CoOOH), while Fe assists in reducing Co3+ to Co2+ so that these species are regenerated in the successive cycles. Thorough observation of results also indicates that the activity of the active sites play a dominating role in determining the performance of the electrocatalyst over the number of adsorption sites. The synthesized CoFeBO coatings displayed good stability and recyclability thereby showcasing potential for industrial applications. Graphic Abstract: [Figure not available: see fulltext.] 2021, The Author(s).
Popat Y.; Orlandi M.; Gupta S.; Bazzanella N.; Pillai S.; Patel M.K.; Miotello A.; Patel N.
Catalysis Letters, Vol-152, No. 2, pp. 438-451.
All Open Access; Hybrid Gold Open Access
Popat Y., Department of Physics, Universitdegli Studi di Trento, Trento, Povo, 38123, Italy; Orlandi M., Department of Physics, Universitdegli Studi di Trento, Trento, Povo, 38123, Italy; Gupta S., School of Engineering, University of Liverpool, Liverpool, L69 3GH, United Kingdom; Bazzanella N., Department of Physics, Universitdegli Studi di Trento, Trento, Povo, 38123, Italy; Pillai S., Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India; Patel M.K., School of Engineering, University of Liverpool, Liverpool, L69 3GH, United Kingdom; Miotello A., Department of Physics, Universitdegli Studi di Trento, Trento, Povo, 38123, Italy; Patel N., Department of Physics and Electronics, Christ University, Karnataka, Bengaluru, 560029, India
An efficient low complexity compression based optimal homomorphic encryption for secure fiber optic communication
Compression; Encryption; Fiber optic communication; Optical networks; Optimal key generation; Security
Latest advancements in fiber optic communication have gained significant attention among researchers owing to many benefits such as high data rate, acceptable cost, bandwidth, low attenuation, etc. Fiber optic networks are found to be a commonly utilized platform to transfer data in several applications such as personal, commercial, military areas, etc. Although fiber optic networks are highly beneficial, security remains a challenging design issue. Numerous state of art works has been developed to achieve security in fiber optic communication. Among the various methods, compression then encryption is an effective way to effectively and securely transmit the data. With this motivation, this paper presents a new Low Complexity Compression Then Encryption using Optimal Homomorphic Encryption (LCCE-OHE) technique for secured fiber optic communication. The proposed LCCE-OHE technique operates on two major phases namely compression and encryption. At the first stage, low complexity compression using Neighboring Indexing Sequence (NIS) with Deflate algorithm, named Normalized Information Distance (NID) is used. Besides, in the second stage, Quasi Oppositional Sail Fish Optimizer with Homomorphic Encryption (QOSFO-HE) technique is employed. The QOSFO algorithm is derived by incorporating the quasi oppositional learning (QOBL) concept to the SFO algorithm and is applied to optimally select the encryption keys. The performance validation of the proposed model takes place on two benchmark datasets and the experimental results are examined interms of different performance measures. The experimental values highlighted the improved compression efficiency and security level of the LCCE-OHE technique over the other techniques. 2022 Elsevier GmbH
Venu D.; Mayuri A.V.R.; Neelakandan S.; Murthy G.L.N.; Arulkumar N.; Shelke N.
https://doi.org/10.1016/j.ijleo.2021.168545 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122210706&doi=10.1016%2fj.ijleo.2021.168545&partnerID=40&md5=bfc4a6dde14053df54ce64a7f2692e9a
Venu D., Department of ECE, KITS Warangal, India; Mayuri A.V.R., School of Computing Science and Engineering, VIT Bhopal University, India; Neelakandan S., Department of Computer Science and Engineering, R.M.K Engineering College, Chennai, India; Murthy G.L.N., Department of Electronics and Communication Engineering, Lakireddy Bali Reddy College of Engineering, Andhra Pradesh, India; Arulkumar N., Department of CS, CHRIST (Deemed to be University), Banglore, India; Shelke N., Department of CSE, Priyadarshini Indira Gandhi College of Engineering, Nagpur, India
Transformational Impact of COVID-19 on Savings and Spending Patterns of Indian Rural Households
COVID-19; financial strategy; rural households; savings motive; spending pattern
COVID-19 has spread across the globe at a shocking level and significantly affects the world economy. The pandemic has significantly impacted rural households, the primary workforce for industrialized urban areas, in every sector of rural businesses, including agriculture. Furthermore, the dearth of employment in the primary industry has also adversely influenced rural inhabitants livelihood and financial decisions. COVID-19 changed the perception of people regarding their income and expenditure. This study is intended to analyse the transformation of savings and spending of rural households during COVID-19. A questionnaire was developed using a Likert scale to elicit study variables, and the collected data were analysed using structural equation modelling. The results showed that all types of savings had a positive and significant relationship with the savings motive of rural households during COVID-19. Further, customary and spontaneous spending had a positive and significant relationship spending pattern of rural households. Rural inhabitants were interested in compromising their spending and other forms of savings to have more emergency savings. Earlier studies have examined either the savings or the spending pattern of rural households, and studies on both savings and spending by rural households are very few. The present study thus adds to the existing literature in the field. The Author(s) 2022.
Gopal S., CHRIST University, Karnataka, Bangalore, India; Mallyasami P., CHRIST University, Karnataka, Bangalore, India
Being a therapeutic clown- an exploration of their lived experiences and well-being
Clowns psyche; Learning; Therapeutic clowning; Values; Wellbeing
Therapeutic clowning uses humor and play to minimize the stress for patients and their families during hospitalization. This study aims to explore the subjective meaning of therapeutic clowning through clowns perspective, understand why they continue clowning and interpret how it has impacted them. The research design takes a qualitative approach using phenomenological paradigm. Nine therapeutic clowns between 20 and 60years with clowning experience of 6months-4years from Compassionate Clowns, located at Bangalore were interviewed. The results reflected that the journey of being a therapeutic clown has been equally therapeutic for the clowns. Based on the thematic data analysis network, it was found that clowning has instilled many values in the way they think. It has given them a platform to learn new things from the children they clown. Therefore, looking at these results it could be said that therapeutic clowning serves as a medium for community service and in maintaining personal wellbeing. 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Current Psychology, Vol-41, No. 3, pp. 1131-1138.
Lalantika V., Department of Psychology, CHRIST (Deemed to be University), Hosur Road, Karnataka, Bangalore, 560029, India; Yuvaraj S., Department of Psychology, CHRIST (Deemed to be University), Hosur Road, Karnataka, Bangalore, 560029, India
Oxidation reactions of carbaryl in aqueous solutions
DFT calculations; H2O2/UV photolysis; LC-Q-TOF-MS; Pulse radiolysis; Radical cation
Hydroxyl radical induced oxidation of carbaryl has been studied using steady state photolysis followed by high-resolution mass spectrometry (LC-Q-TOF-MS), pulse radiolysis, and theoretical (DFT) calculations. The reaction of ?OH with carbaryl resulted in a number of hydroxylated adduct radicals (?max - 330 nm and 390 nm; k2 - 1.2 1010 dm3 mol-1 s-1). The DFT calculations and results obtained from LC-Q-TOF-MS analysis shows the possible addition of ?OH at C1 (energetically most stable) and C7 positions of carbaryl leading to the generation of resonance stabilized hydroxycyclohexadienyl-type radicals as the immediate intermediates, which eventually converted into naphthol and a hydroxylated naphthols. LC-Q-TOF-MS results also revealed the formation of other hydroxylated derivatives and naphthoquinones that are most likely originated from the consecutive ?OH attack on the initially formed products. Naphthoquinones are found to undergo ring opening and the corresponding products are identified. The reaction of SO4?- with carbaryl, on the other hand, results the radical cation of parent molecule (?max - 320 nm and 390 nm) which exhibits reasonable stability in the pulse radiolysis timescale. Total organic carbon (TOC) analysis after H2O2/UV photolysis revealed that nearly 70% of the organic content is mineralized after 35 min of irradiation, which demonstrates the potential application of oxidative methods towards the degradation of carbaryl. 2021 Elsevier B.V.
Nair S.R.; Menacherry S.P.M.; Renjith S.; Manojkumar T.K.; Aravind U.K.; Aravindakumar C.T.
https://doi.org/10.1016/j.chemphys.2021.111427 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121317051&doi=10.1016%2fj.chemphys.2021.111427&partnerID=40&md5=cd8cf7d250e581f4a5a97230f6ca53ce
Nair S.R., School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala, India, Department of Chemistry, Mahatma Gandhi College, Trivandrum, Kerala, India; Menacherry S.P.M., School of Environmental Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala, India, Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Soil Science and Soil Protection, Kamk129, Prague 6, 16,521, Czech Republic; Renjith S., Department of Chemistry, Christ University, Bengaluru, 560029, Karnataka, India; Manojkumar T.K., Indian Institute of Information Technology and Management, Thiruvananthapuram, 695 581, Kerala, India; Aravind U.K., School of Environmental Studies, Cochin University of Science and Technology (CUSAT), Kochi, Kerala, India; Aravindakumar C.T., School of Environmental Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala, India, Inter University Instrumentation Centre, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala, India
A new numerical investigation of fractional order susceptible-infected-recovered epidemic model of childhood disease
Caputo fractional derivative; Laplace transform; q-homotopy analysis method; Susceptible-infected-recovered epidemic model
The susceptible-infected-recovered (SIR) epidemic model of childhood disease is analyzed in the present framework with the help of q-homotopy analysis transform method (q-HATM). The considered model consists the system of three differential equations having fractional derivative, and the non-linear system exemplifies the evolution of childhood disease in a population and its influence on the community with susceptible, infected and recovered compartment. The projected method is a mixture of q-homotopy analysis method and Laplace transform. Two distinct explanatory cases are considered, and corresponding simulations have been demonstrated in terms of plots for different value of the order. The present investigation elucidates that the projected both derivative and technique play a vital role in the analysis and illustrate the behaviour of diverse mathematical models described with differential equations in human disease. 2021 THE AUTHORS
Veeresha P.; Ilhan E.; Prakasha D.G.; Baskonus H.M.; Gao W.
Alexandria Engineering Journal, Vol-61, No. 2, pp. 1747-1756.
https://doi.org/10.1016/j.aej.2021.07.015 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111498928&doi=10.1016%2fj.aej.2021.07.015&partnerID=40&md5=25c8170d2425e34bd202dfeea2d8179a
Veeresha P., Center for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to be University), Bengaluru, 560029, India; Ilhan E., Faculty of Engineering and Architecture, Kirsehir Ahi Evran University, Kirsehir, 40500, Turkey; Prakasha D.G., Department of Mathematics, Faculty of Science, Davangere University, Shivagangothri, Davangere, 577007, India; Baskonus H.M., Department of Mathematics and Science Educations, Faculty of Education, Harran University, Sanliurfa, 63050, Turkey; Gao W., School of Information Science and Technology, Yunnan Normal University, Yunnan, China
Desymmetrisation of meso-2,4-Dimethyl-8-oxabicyclo[3.2.1]-oct-6-ene-3-ol and its Application in Natural Product Syntheses
Chiral pool; Dimethyl-8-oxa-bicyclo[3.2.1]oct-6-en-3-ol; Hydroboration; Lactone; Natural products; Total synthesis
The compounds containing chiral centers and different functional groups serve as magnificent building blocks for the preparation of various natural products that are having immense biological activity. Dimethyl-8-oxa-bicyclo[3.2.1]oct-6-en-3-ol is one of the wonderful synthons to construct multiple stereo centers at a time during the asymmetric synthesis. In this account, we discuss our research efforts toward the synthesis of various simple and complex natural products from the past three decades (19952020) by using dimethyl-8-oxa-bicyclo[3.2.1]oct-6-en-3-ol as a synthon. Moreover, the synthetic utility of this starting material was investigated and well demonstrated. Further, we executed the desymmetrization of dimethyl-8-oxa-bicyclo[3.2.1]oct-6-en-3-ol by hydroboration to get different chiral centers. After obtaining the stereocenters, we could manage either the fragment, formal or total synthesis of natural products, by simple protection and deprotection sequence followed by C?C bond formation steps. 2021 The Chemical Society of Japan & Wiley-VCH GmbH
Tadiparthi K.; Anand P.; Sakirolla R.; Gupta T.P.; Jadhav K.A.; Kishore Das S.; Singh Yadav J.
ISSN: 15278999; PubMed ID: 34894063; CODEN: CRHEA
https://doi.org/10.1002/tcr.202100286 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121334577&doi=10.1002%2ftcr.202100286&partnerID=40&md5=6841fc6870588d1ce2ad042b10fcfc14
Tadiparthi K., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India, Natural Product Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India; Anand P., Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India; Sakirolla R., Department of Chemistry, Central University of Karnataka, Gulbarga, Karnataka, 585367, India, Natural Product Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India; Gupta T.P., School of Science, Indrashil University, Kadi, Mehsana, Gujarat, 382740, India; Jadhav K.A., School of Science, Indrashil University, Kadi, Mehsana, Gujarat, 382740, India; Kishore Das S., School of Science, Indrashil University, Kadi, Mehsana, Gujarat, 382740, India; Singh Yadav J., Natural Product Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India, School of Science, Indrashil University, Kadi, Mehsana, Gujarat, 382740, India
Strategically fabricated Ag loaded Fe-g-C3N4 nanosheet for photocatalytic removal of aqueous organic pollutant
Ag nanoparticles; Doping; g-C3N4; Organic pollutant; Photocatalyst
The efficiency of the photocatalyst towards the degradation of organic pollutants depends on the harvesting of the visible light and inhibiting the recombination rate of electron-hole pairs to create a large number of charge carriers to drive the redox reaction. Most charge carriers recombine in 2D photocatalyst like g-C3N4 through the bulk process within the stacked layered structure. The recombination through bulk can be suppressed through nanosheet formation, while surface recombination can be inhibited via fast interfacial photogenerated charge transfer. In the present work, Ag-loaded Fe-doped g-C3N4 nanosheet (Ag/Fe-g-C3N4 NS) photocatalyst was synthesized by combining three effective strategies i.e., Fe doping, nanostructuring, and Ag loading. Various analytical techniques have been employed to characterize all the prepared samples. The results indicate that Fe doping influences visible light absorption by modifying the electronic and optical properties. In contrast, nanosheet formation leads to a significant increment in the number of active sites due to the increased surface area. Ag anchoring over Fe-g-C3N4 NS favors charge separation at the interface of Fe-g-C3N4 and Ag due to the presence of the Schottky barrier. Integration of all the three strategies in Ag/Fe-g-C3N4 NS creates a synergistic effect to add beneficial properties and displays a 5-fold improvement in photocatalytic degradation of organic pollutants, as compared to pure g-C3N4. The present study provides a novel and facile approach for realizing an efficient photocatalyst for environmental remediation. 2022 Elsevier B.V.
Yadav M.; Yadav A.; Thorat N.; Varma R.; Pillai S.; Fernandes R.; Patel R.; Patel N.
https://doi.org/10.1016/j.optmat.2022.112043 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124293945&doi=10.1016%2fj.optmat.2022.112043&partnerID=40&md5=9e195660ca3b380dc1c9f8323b4240e0
Yadav M., National Centre for Nanosciences & Nanotechnology, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India; Yadav A., Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India; Thorat N., Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India; Varma R., Department of Chemistry, Institution of Chemical Technology, Matunga, 400 208, India; Pillai S., Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, Kerala, India; Fernandes R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Patel R., Department of Physics, NES Ratnam College, University of Mumbai, Bhandup (West), Mumbai, 400078, India; Patel N., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India
Geraniol and Citral as potential therapeutic agents targeting the HSP90 activity: An in silico and experimental approach
ATPase activity; AutoDock; Citral; Geraniol; HSP90; MetaPocket; Sequence alignment
Lemongrass essential oil has antifungal and anti-cancerous properties. Heat-shock protein (HSP90), an ATP-dependent molecular chaperone found in eukaryotes, is involved in protein folding, stability, and disease, making it a promising research topic. Both in silico and in vitro approaches were used to provide a clear insight into the HSP90-ATPase 3D structures, activity, and their interaction with the essential oil constituents among various species such as fungi (S. cerevisiae), parasites (P. falciparum), and humans. For in silico studies, sequence alignment, docking (AutoDock), and absorption, distribution, metabolism, and excretion (ADME) properties were evaluated to obtain hit compounds specifically against each HSP90-ATPase. The hit compounds obtained were evaluated for their efficacy in the in vitro studies of S. cerevisiae. In vitro studies were carried out targeting HSP90-ATPases via lemongrass essential oil components individually and in combination as a function of concentration and various salt concentrations. Results suggest that sequence alignment exists of over 75% among these three species. The best docking score was possessed by Geraniol and its constituent (geldanamycin ? ?4.93 kcal/mol) (a known antifungal and antitumor against HSP90) in all the above species. Lemongrass oil and the combination of Geraniol and Citral at concentrations of 80 ?g/mL showed the maximum inhibition of ATPase and HSP90-ATPase activity compared to their individual treatment. Therefore, both in silico and in vitro studies provide clear evidence of specific inhibitory action of lemongrass oil, Geraniol, and Citral against the ATPase and HSP90ATPase activities and might show potential as antifungal and antitumor drugs. 2021
Gaonkar R.; Singh J.; Chauhan A.; Avti P.K.; Hegde G.
ISSN: 319422; PubMed ID: 34942558; CODEN: PYTCA
https://doi.org/10.1016/j.phytochem.2021.113058 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121741574&doi=10.1016%2fj.phytochem.2021.113058&partnerID=40&md5=135cebf8d904ae4d9f3a5c708068810e
Gaonkar R., Department of Biotechnology, BMS College of Engineering, Bangalore, Karnataka, India; Singh J., Department of Biophysics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India; Chauhan A., Department of Biophysics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India; Avti P.K., Department of Biophysics, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India; Hegde G., Centre for Advanced Research and Development (CARD), CHRIST (Deemed to be University), Hosur Rd, Bangalore, 560029, India
Challenges to state control of territory: Comparative analysis of Yemen, Afghanistan and Myanmar
Afghanistan; armed non-state actors; external intervention; failed state; insurgency; Myanmar; state legitimacy; territorial sovereignty; Yemen
States around the world have lost control over their territory to armed non-state actors, including states like Yemen, Afghanistan and Myanmar in the Asian region. This article aims to understand why these states are unable to exercise control over all of their territory. The study identifies and examines four major challenges faced by states in maintaining control over their territory lack of state legitimacy and effectiveness, strategic motives of armed non-state actors, socio-economic motives of armed non-state actors and external intervention. A comparative analysis of the cases of Yemen, Afghanistan and Myanmar illustrates the wide relevance of these challenges faced by the states with respect to territorial control. The Author(s) 2021.
Asian Journal of Comparative Politics, Vol-7, No. 1, pp. 115-131.
Korishetti S., Sumedha Korishetti, Christ (Deemed to be University), India
Friction Stir Welding of Dissimilar Aluminium Alloys for Vehicle Structures
Aerospace; Design of experiments; Friction stir welding; Machining; Optimization; Taguchi technique
Welding process in vehicle structures has gained importance, especially for better strength and mechanical properties. Hence, there is vast research going on in the domain of newer welding techniques. Friction Stir Welding (FSW) is one of them. FSW is used in this research to join two different grades of aluminium alloys by varying the process parameters. The process parameters are optimized based on the Design of Experiments (DoE) and the Taguchi techniques. From the experimental findings for different process parameters, the optimized set of conditions involving the normal, transverse forces and the torque are determined. Further, the process methodology is validated. 2022, MechAero Found. for Techn. Res. and Educ. Excellence. All rights reserved.
Ramesha K.; Sudersanan P.D.; Gowda A.C.; Santhosh N.; Jangam S.; Manjunath N.
International Journal of Vehicle Structures and Systems, Vol-14, No. 1, pp. 5-9.
MechAero Found. for Techn. Res. and Educ. Excellence
https://doi.org/10.4273/ijvss.14.1.02 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124161142&doi=10.4273%2fijvss.14.1.02&partnerID=40&md5=0d31a08e3e4f8b8ce5140b66dbcce8e2
Ramesha K., Dept. of Mech. and Automobile Engg, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Sudersanan P.D., Dept. of Mech. and Automobile Engg, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Gowda A.C., Dept. of Mech. Engg., Visvesvaraya Tech. University, Karnataka, Muddenahalli, India; Santhosh N., Dept. of Mech. Engg., MVJ College of Engg., Karnataka, Bengaluru, India; Jangam S., Dept. of Mech. and Automobile Engg, CHRIST (Deemed to be University), Karnataka, Bengaluru, India; Manjunath N., Dept. of Sci. and Humanities Engg, CHRIST (Deemed to be University), Karnataka, Bengaluru, India
Corrosion behavior of AlCuFeMn alloy in aqueous sodium chloride solution
EIS; Medium entropy alloy; Pitting corrosion; XPS
Medium Entropy Alloy AlCuFeMn possesses high room temperature strength and oxidation endurance. In present work, the aqueous corrosion resistance of the as-cast as well as low temperature oxidized AlCuFeMn alloy in 3.5 wt% NaCl solution, is explored. Equimolar proportions of high purity copper, manganese, iron, and aluminum were arc melted and cast in a copper mold. The alloy primarily consists of a face-centered cubic and a body-centered cubic phase. Potentiodynamic polarization tests on the alloy after low temperature surface oxidation reveal an aqueous corrosion resistance comparable to AISI 304 steel and CoCrFeMnNi high entropy alloy. The X-ray photoelectron spectroscopic studies confirmed that the free surface in the as-cast alloy is in partially oxidized state. The same completely oxidizes after low-temperature surface oxidation. Such low temperature surface oxidation improves pitting corrosion resistance in AlCuFeMn alloy due to increased metal/oxide layer resistance. The electrochemical impedance spectroscopy tests coupled with microscopy confirmed that the principal corrosion mechanisms in the alloy are of the uniform and pitting type. The energy dispersive spectroscopy experiments indicate that a copper oxide enriched layer is formed on the surface oxidized specimen during corrosion. 2021 Elsevier B.V.
Dutta A.; Sivaji T.; Ghosh M.; Fernandes R.; De P.S.; Nayak D.; Sharma R.
Materials Chemistry and Physics, Vol-276
https://doi.org/10.1016/j.matchemphys.2021.125397 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118968199&doi=10.1016%2fj.matchemphys.2021.125397&partnerID=40&md5=53be1348f527ab31e455574911bffb26
Dutta A., School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, India; Sivaji T., School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, India; Ghosh M., Materials Engineering Division, CSIR-National Metallurgical Laboratory, Jamshedpur, India; Fernandes R., Department of Physics and Electronics, Christ University, Bangalore, India; De P.S., School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, India; Nayak D., School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, India, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, India; Sharma R., School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, India
THE VICIOUS LOOP OF BODY SHAMING AND SELF-PROJECTION: AN EXPLORATIVE STUDY OF INDIAN YOUNG PEOPLE AGED 20-30 YEARS OLD
interpretative phenomenological analysis; marketing by accepting; self-projection; vicious loop; well-being
Background: Body shaming leads to much insecurity that is often overlooked. Its impact results in many ways, either in the form of some mental disorder, non-acceptance of oneself, low self-esteem, decreased life satisfaction, etc. The Media adds to it by portraying perceived perfectionism in terms of appearance which at times acts as a trigger to people already suffering or going through these. Purpose: The purpose of the study was to explore the psychological effects of body shaming on young people, and to analyze the role and impact of media in the portrayal of body image issues. Design/Methodology/Approach: A Semi-structured interview of 20 participants was carried forward (10 males & 10 females belonging). All Participants belonged to the age bracket of 20-30 years. Interpretative Phenomenological Analysis was conducted thereafter. Findings: All the participants mentioned that body shaming has affected their well-being and self-esteem and it led them to body shame others as well. It was also found that media has been marketing body image issues in many ways which created both positive and negative impacts. The following themes were generated based on analysis: age-appropriate body, rituals to fit in, marketing by accepting, after effects, the vicious loop, confusion to/and acceptance. Conclusion: The psychological impact of body shaming is often overlooked and that creates more damage. Similarly, the marketing of body image issues is so popular that often it is used in the form of humour. All of these experiences create a deep impact on people and lead them to the vicious loop of body shaming. 2022, RJ4All Publications. All rights reserved.
Youth Voice Journal, Vol-2, No. Special Issue, pp. 69-79.
Cherian A., Department of Psychology, School of Humanities and Social Sciences, CHRIST (Deemed to be) University, Delhi NCR, India; Mukherjee S., Department of Psychology, School of Humanities and Social Sciences, CHRIST (Deemed to be) University, Delhi NCR, India
Role of digital technologies to combat COVID-19 pandemic
Artificial intelligence; BigData; Coronavirus; COVID-19; Diagnosis; IoT
Purpose: The unexpected epidemic of the latest coronavirus in 2019, known as COVID-19 by the Globe, a number of governments worldwide have been put in a vulnerable situation by the World Health Organization. The effect of the COVID-19 outbreak, previously experienced by Chinas citizens alone, has now become more pronounced. For practically every nation in the world, this is a matter of grave concern. The lack of assets to withstand the infection of COVID-19, mixed with the perception of overwhelmed medical mechanisms, pressured a number of places in a state of partial or absolute lockdown. Design/methodology/approach: The medical photos such as computed tomography (CT) and X-ray playa key role in the worldwide battle against COVID-19, while artificial intelligence (AI) has recently appeared. The power of imaging is further increased by technology tools and support for medical specialists. In comparison to the related direct health effects because of the COVID-19 disaster, this research identifies its impacts on the overall society. Findings: This paper hereby examines the rapid answers in the medical imaging community toward COVID-19 (empowered by AI). For example, the acquisition of AI-empowered images will significantly assist automate the scanning process and reshape the procedure as well. AI, too, may improve the quality of the job by correctly delineating X-ray and CT image infections, promoting subsequent infections, quantification. In addition, computer-aided platforms support radiologists make medical choices, i.e. for illness tracking, diagnosis and prognosis. Originality/value: This research encompasses the whole medical imaging pipeline and methods for research related to COVID-19, include a collection of images, segmentation, diagnosis and monitoring. In drawing stuff to minimize the effects of the COVID-19 epidemic, this paper is investigating the use of technologies such as the internet of things, unmanned aerial vehicles, blockchain, AI, big data and 5G. 2021, Emerald Publishing Limited.
Rajendran R.; Piali B.; Chandrakala P.; Gampala V.; Majji S.
World Journal of Engineering, Vol-19, No. 1, pp. 72-79.
https://doi.org/10.1108/WJE-01-2021-0043 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106282632&doi=10.1108%2fWJE-01-2021-0043&partnerID=40&md5=50b0def0927da7c027811dfb235116aa
Rajendran R., Christ University, Bangalore, India; Piali B., Jamshedpur Womens College, Ranchi, India; Chandrakala P., Auroras Post Graduate College, Ramanthapur, India; Gampala V., Koneru Lakshmaiah Education Foundation, Guntur, India; Majji S., GRIET, Hyderabad, India