Colonoscopy contrast-enhanced by intuitionistic fuzzy soft sets for polyp cancer localization
Colonoscopy image; Fuzzy entropy; Fuzzy set; Fuzzy soft set; Intuitionistic fuzzy set; Polyp cancer; Visual enhancement
Medical images often suffer from low contrast, irregular gray-level spacing and contain a lot of uncertainties due to constraints of imaging devices and environment (various lighting conditions) when capturing images. In order to achieve any clinical-diagnosis method for medical imaging with better comprehensibility, image contrast enhancement algorithms would be appropriate to improve the visual quality of medical images. In this paper, an automated image enhancement method is presented for colonoscopy images based on the intuitionistic fuzzy soft set. The fuzzy soft set is used to model the intuitionistic fuzzy soft image matrix based on a set of soft features of the colonoscopy images. The technique decomposes the fuzzy image into multiple blocks and estimates a soft-score based on an adaptive soft parametric hesitancy map by using the hesitant entropy for each block to quantify the uncertainties. In the processing stage, an adaptive intensity modification process is done for each block according to its soft-score. These scores are accurately addressed the gray-level ambiguities in colonoscopy images that lead to better results. Finally, the enhanced image achieved by performing a defuzzification together with all unprocessed blocks. Qualitative and quantitative assessments demonstrate that the proposed method improves image contrast and region-of-interest of polyps in colonogram. Experimental results on enhancing a large CVC-Clinic-DB and ASU-Mayo clinic colonoscopy benchmark datasets show that the proposed method outperforms the state-of-the-art medical image enhancement methods. 2020 Elsevier B.V.
Biswas B.; Bhattacharyya S.; Chakrabarti A.; Dey K.N.; Platos J.; Snasel V.
https://doi.org/10.1016/j.asoc.2020.106492 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086996601&doi=10.1016%2fj.asoc.2020.106492&partnerID=40&md5=0bcc131fe06b5a13d6fea8652ddd76fe
Biswas B., Computer Science and Engineering, University of Calcutta, Kolkata, WB, India; Bhattacharyya S., Computer Science and Engineering, Christ University, Bangalore, India; Chakrabarti A., A.K.C.S.I.T., University of Calcutta, Kolkata, WB, India; Dey K.N., Computer Science and Engineering, University of Calcutta, Kolkata, WB, India; Platos J., Electrical Engineering and Computer Science, VSB Technical University of Ostrava, Ostrava, Czech Republic; Snasel V., Electrical Engineering and Computer Science, VSB Technical University of Ostrava, Ostrava, Czech Republic
The influence of social environment on children of a commercial sex worker
Children of commercial sex worker; environmental variance; siblings
The case study aims to understand the influence of social environment on the course of life of children of a commercial sex worker. The participants of the study were two sons of a commercial sex worker who grew up in different environments. The older sibling who is 19 years of age (case 1) lives with his mother, whereas the younger sibling who is 17 years of age (case 2) lives in a hostel distant from everyday influence of a brothel. The study adopts multiple case study design and in-depth interviews were conducted to gather data. The obtained data were subjected to thematic analysis. Each case was analyzed individually, and then cross comparison of the themes derived was carried out. The themes derived on analyzing case 1 were social categorization, mercenary activity, substance aficionado, complacency in life, and compliance with life while the themes derived on analyzing case 2 were disgust toward commercial sex work, feeling of precariousness, antipathy toward home environment, irrational thoughts and anticipation of a better future. The only overlapping issue that emerged in both cases was being protective about their mother. It was concluded that environmental variance contributes to the difference in experience and perception of the situation and society. Indian Journal of Social Psychiatry. All Rights Reserved.
Indian Journal of Social Psychiatry, Vol-36, No. 4, pp. 310-316.
https://doi.org/10.4103/ijsp.ijsp_8_20 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85150779721&doi=10.4103%2fijsp.ijsp_8_20&partnerID=40&md5=ca341c951107e6f68792b12c9565f320
Deepa V., Department of Psychology, SDM College (Autonomous), Dakshina Kannada, India; Manjula M., Department of Psychology, Christ (Deemed To Be University), Karnataka, Bengaluru, India
Galerkin finite element analysis of magneto-hydrodynamic natural convection of Cu-water nanoliquid in a baffled U-shaped enclosure
Baf?ed U-shaped; Galerkin ?nite element method; Nanoliquid; Natural convection; Nusselt number; Rayleigh number
In this paper, single-phase homogeneous nanofluid model is proposed to investigate the natural convection of magneto-hydrodynamic (MHD) flow of Newtonian CuH2O nanoliquid in a baffled U-shaped enclosure. The Brinkman model and Wasp model are considered to measure the effective dynamic viscosity and effective thermal conductivity of the nanoliquid correspondingly. Nanoliquid's effective properties such as specific heat, density and thermal expansion coefficient are modeled using mixture theory. The complicated PDS (partial differential system) is treated for numeric solutions via the Galerkin ?nite element method. The pertinent parameters Hartmann number (1 ? Ha ? 60), Rayleigh number (103 ? Ra ? 106) and nanoparticles volume fraction (0% ? ? ? 4%) are taken for the parametric analysis, and it is conducted via streamlines and isotherms. Excellent agreement between numerical results and open literature. It is ascertained that heat transfer rate enhances with Rayleigh number Ra and volume fraction ?, however it is diminished for larger Hartmann number Ha. 2020 Beihang University
Zaim A.; Aissa A.; Mebarek-Oudina F.; Mahanthesh B.; Lorenzini G.; Sahnoun M.; El Ganaoui M.
Propulsion and Power Research, Vol-9, No. 4, pp. 383-393.
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.1016/j.jppr.2020.10.002 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097766438&doi=10.1016%2fj.jppr.2020.10.002&partnerID=40&md5=f9e1c5fb04a4c6269c460406f1c03f32
Zaim A., BLSTE Laboratory, Faculty of Science and Technology, University of Mascara, Mascara, Algeria; Aissa A., Laboratoire de Physique Quantique de La Matie et Modisation Mathatique (LPQ3M), UniversitMustapha Stambouli de Mascara, Mascara, Algeria; Mebarek-Oudina F., Department of Physics, Faculty of Sciences, University of 20 Ao 1955-Skikda, Skikda, 2100, Algeria, Laboratoire des Matiaux et Gie Energique (LMGE), University of 20 Ao 1955-Skikda, Skikda, 2100, Algeria; Mahanthesh B., Department of Mathematics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Lorenzini G., Department of Engineering and Architecture, University of Parma, Parco Area Delle Scienze 181/A, Parma, 43124, Italy; Sahnoun M., Laboratoire de Physique Quantique de La Matie et Modisation Mathatique (LPQ3M), UniversitMustapha Stambouli de Mascara, Mascara, Algeria; El Ganaoui M., Laboratoire ergique de Longwy (FJV/LERMAB), Universitde Lorraine, France
On certain chromatic topological indices of some Mycielski graphs
Chromatic Zagreb indices; Irregularity indices; Mycielski graphs
As a coloring analogue of different Zagreb indices, in the recent literature, the notion of chromatic Zagreb indices has been introduced and studied for some basic graph classes in trees. In this paper, we study the chromatic Zagreb indices and chromatic irregularity indices of some special classes of graphs called Mycielski graphs of paths and cycles. 2020 Yarmouk University. All rights reserved.
Jordan Journal of Mathematics and Statistics, Vol-13, No. 4, pp. 487-503.
Rose S., Department of Mathematics, St. Mary's College, Kerala, Thrissur, India; Naduvath S., Department of Mathematics, CHRIST (Deemed to be University), Karnataka, Bangalore, India
Chloroform fraction of Chaetomorpha brachygona, a marine green alga from Indian Sundarbans inducing autophagy in cervical cancer cells in vitro
Sundarbans Mangrove Ecosystem (SME) is a rich repository of bioactive natural compounds, with immense nutraceutical and therapeutic potential. Till date, the algal population of SME was not explored fully for their anticancer activities. Our aim is to explore the potential of these algal phytochemicals against the proliferation of cervical cancer cells (in vitro) and identify the mode of cell death induced in them. In the present work, the chloroform fraction of marine green alga, Chaetomorpha brachygona was used on SiHa cell line. The algal phytochemicals were identified by GCMS, LCMS and column chromatography and some of the identified compounds, known for significant anticancer activities, have shown strong Bcl-2 binding capacity, as analyzed through molecular docking study. The extract showed cytostatic and cytotoxic activity on SiHa cells. Absence of fragmented DNA, and presence of increased number of acidic vacuoles in the treated cells indicate nonapoptotic cell death. The mode of cell death was likely to be autophagic, as indicated by the enhanced expression of Beclin 1 and LC3BII (considered as autophagic markers) observed by Western blotting. The study indicates that, C. brachygona can successfully inhibit the proliferation of cervical cancer cells in vitro. 2020, The Author(s).
Majumder I., Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India; Paul S., School of Biotechnology, Presidency University, Canal Bank Rd, DG Block, Action Area 1D, New Town, 700156, West Bengal, India; Nag A., Department of Life Sciences, CHRIST (Deemed To Be University), Bangalore, 560029, India; Kundu R., Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India
Blockchain enabled energy efficient red deer algorithm based clustering protocol for pervasive wireless sensor networks
Blockchain; Energy efficiency; Metaheuristic; Pervasive computing; Wireless networks
Energy efficiency and security are considered as important issues in the design of pervasive wireless networks. Since the nodes in pervasive wireless networks are battery-operated, it becomes essential to develop an energy-efficient method to minimize energy consumption and prolong the network lifetime. This paper presents new energy-efficient and secure clustering based data transmission in pervasive wireless networks using red deer algorithm (RDA) based clustering technique with blockchain enabled secured data transmission, named as RDAC-BC. The proposed RDAC-BC technique undergoes node initialization and performs the clustering process using the RDAC technique. The clustering technique performs cluster head (CH) selection and cluster construction process is carried out. Once the CHs are chosen, blockchain enabled secure data transmission takes place among cluster members (CMs) as well as CHs. The application of RDAC and blockchain technology helps to achieve energy efficiency and security. The experimental validation of the RDAC-BC technique is assessed under several aspects and the results are compared with existing methods. The obtained results ensured that the RDAC-BC technique has shown superior results interms of energy, network lifetime, packet delivery ratio (PDR), and throughput. 2020 Elsevier Inc.
Nguyen G.N.; Le Viet N.H.; Devaraj A.F.S.; Gobi R.; Shankar K.
Sustainable Computing: Informatics and Systems, Vol-28
https://doi.org/10.1016/j.suscom.2020.100464 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095883280&doi=10.1016%2fj.suscom.2020.100464&partnerID=40&md5=48c8ae3d2862c2f9426c1eb45a503588
Nguyen G.N., Graduate School, Duy Tan University, Da Nang, 550000, Viet Nam, Faculty of Information Technology, Duy Tan University, Da Nang, 550000, Viet Nam; Le Viet N.H., Graduate School, Duy Tan University, Da Nang, 550000, Viet Nam, Faculty of Information Technology, Duy Tan University, Da Nang, 550000, Viet Nam; Devaraj A.F.S., Department of Computer Science and Engineering, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, India; Gobi R., Department of Computer Science, Christ University, Bangalore, India; Shankar K., Department of Computer Applications, Alagappa University, Karaikudi, India
Rhetorics in/of English language education in India: A case of digital natives in higher education programs
Critical skills; Digitalization; EAP; ELE; ELT; English in India; General English
The study briefly analyzes the ELT situation in India which is replete with challenges emerging from the lack of engagement with the phenomenon of digitality that further shapes the existing nature of learning and the needs of the learner. After locating the position of English Language in the new education policy of India, the paper discusses the General English (GE) courses offered at undergraduate level at the city of Bangalore in India, thereby shedding light on the existing gaps between policy and practice. It is based on this conjecture that the paper suggests the possibility of introducing rhetorical practices in GE courses at undergraduate levels in various institutions in urban India. In order to substantiate this suggestion, the results of a survey conducted with the learners (N=359) of a GE course based on rhetorics at a Southern Indian university is provided. Empirical data along with a brief reflection on the learners' voices are used in the study to examine the efficacy of the structure, administration and evaluation practices of this new course. The study thus opens up possibilities of initiating a discourse around the mode in which English language education and teaching is envisioned, formulated and implemented in undergraduate programs across urban India. 2020 ELE Publishing. All rights reserved.
Journal of English as an International Language, Vol-15, No. 2
Vijayaraghavan A.P., Christ (Deemed to be University), Bangalore, India; Chattaraj D., Christ (Deemed to be University), Bangalore, India
The effect of boundary conditions on the onset of chaos in RayleighBard convection using energy-conserving Lorenz models
Chaos; FourierGalerkin; Hopf bifurcation; Lorenz model; RayleighBard convection; StuartLandau equation
The influence of 16 boundary conditions on linear and nonlinear stability analyses of RayleighBard system is reported. A StuartLandau amplitude equation for the RayleighBard system between stress-free, isothermal boundary conditions is derived and the procedure used in this derivation serves as guidance for constructing an appropriate FourierGalerkin expansion for the other 15 boundary conditions to derive a generalized Lorenz model. The influence of the boundary conditions comes within the coefficients of the generalized Lorenz model. It is shown that the obtained generalized Lorenz model is energy conserving and for certain boundary conditions it retains features of the classical Lorenz model. Further, the principle of exchange of stabilities is shown to be valid for the present problem and hence it is the steady-state, linearized version of the generalized Lorenz model which yields an analytical expression for the Rayleigh number. On minimizing this expression with respect to wave number the critical Rayleigh number at which the onset of regular convective motion occurs in the form of rolls is determined for all 16 boundary conditions. It is found that these values are in good agreement with those of previous investigations leading to the conclusion that the chosen minimal FourierGalerkin expansion is a valid one. Exhibition of chaotic motion in the generalized Lorenz system at the Hopf Rayleigh number is studied. The phase-space plots which indicate a clear-cut visualization of the transition from regular convective motion to chaotic motion in the generalized Lorenz system are presented. Further, existence of a developing region for chaos (mildly chaotic motion) and windows of periodicity are captured using the bifurcation diagrams. It is concluded from the phase-space plots and the bifurcation diagrams that the generalized Lorenz model for certain sets of boundary conditions retains all the features of the classical Lorenz model. Such a conclusion cannot be made by a linear stability analysis and the need thus for a nonlinear analysis is highlighted in the paper. 2020 Elsevier Inc.
Applied Mathematical Modelling, Vol-88, pp. 349-366.
https://doi.org/10.1016/j.apm.2020.06.062 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087996083&doi=10.1016%2fj.apm.2020.06.062&partnerID=40&md5=7ad2dc8372e77f283da13d3926bc50f0
Kanchana C., Harbin Institute of Technology, Shenzhen, Nanshan District, Shenzhen, 518055, China; Siddheshwar P.G., CHRIST(Deemed to be University), Bengaluru, 560056, India; Yi Z., Harbin Institute of Technology, Shenzhen, Nanshan District, Shenzhen, 518055, China
How efficient are public sector banks in India? A non-parametric approach
Advances; Banking system; Data envelopment analysis; Deposits; Intermediation; Loans
This study examines the efficiency of Public Sector Banks (PSBs) in India using Data Envelopment Analysis (DEA). Analysis is carried out on a sample of 19 PSBs that are existed during the study period from 2005 to 2018. There are two different aspects deliberated, namely technical efficiency of PSBs and the growth in their productivity. Input variables envisaged for the study are deposits, borrowings, fixed assets, and the number of employees. Loans and advances along with investments act as output variables to measure technical efficiency and productivity. The results indicate that the technical efficiency of PSBs ranges between 97% and 100%. Corporation Bank, Indian Bank, and Oriental Bank of Commerce outperformed their peers with 100% technical efficiency. Productivity growth among the sampled banks during the study period stood between 0.8% and 20%. However, Corporation Bank, Indian Bank, and Oriental Bank of Commerce registered 9.1%, 5.4% and 6.4% productivity growth, respectively. The results reveal that PSBs are working hard to optimize resource utilization. Researchers around the world can use DEA as a tool to measure the efficiency of banks with different input and output variables related to financial, marketing and managerial performance. Sangeetha R., 2020.
Banks and Bank Systems, Vol-15, No. 4, pp. 108-120.
Sangeetha R., School of Business and Management, CHRIST University, India
The mediating role of positive perceptions on coping strategies and psychological well-being among mothers of children with intellectual disabilities
Coping; India; Mediation; Mothers of children with intellectual disabilities; Positive perceptions; Well-being
Purpose: Research on caregiving has been considering the positive effects experienced by the mothers of children with disabilities. This paper aims to examine whether positive perceptions mediate the relationships between coping strategies used and psychological well-being among mothers of children with intellectual disabilities. Design/methodology/approach: The study opted for a quantitative approach that includes a correlation research design to examine the relationships between the variables of coping, positive perceptions and well-being among mothers of children with intellectual disabilities attending special schools in the metropolitan city Bengaluru, India. The four-factor structure of Brief COPE examined were active avoidance coping, problem-focussed coping, positive coping and religious-denial coping. Positive perceptions refer to the positive contributions for the mother from the experiences of raising a child with intellectual disability. Mediation analysis explored the relationship between the variables. Findings: Problem-focussed coping was the most commonly reported coping factor and was associated with higher levels of well-being. Active-avoidance coping was the least commonly reported coping strategy. Positive perceptions partially mediated the relationship between the four coping factors and maternal well-being. These findings indicate that positive maternal perceptions have important implications for the employment of effective coping strategies that are associated with enhancement of psychological well-being. Originality/value: The focus on positive perceptions would help in understanding the use of coping strategies and planning of support services or interventions. The positive mental health of mothers paves the way for positive developments in the childs physical and psychological health. 2020, Emerald Publishing Limited.
Advances in Mental Health and Intellectual Disabilities, Vol-14, No. 6, pp. 263-272.
https://doi.org/10.1108/AMHID-02-2020-0004 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091168715&doi=10.1108%2fAMHID-02-2020-0004&partnerID=40&md5=1e3b321def0090b80e54c75ac45df02c
Gupta S., Department of Psychology, Christ University, Bangalore, India; Kumar A., Department of Psychology, Christ University, Bangalore, India
Stochastic frontier analysis to measure technical efficiency: Evidence from skilled and unskilled agricultural labour in india
Mustard production; Skilled/ Unskilled Labour; Stochastic frontier analysis; Technical efficiency
This paper comprises the stochastic frontier model which has been applied to measure the technical efficiency of skilled and unskilled labour. By considering the certain input variables listed in the cost of cultivation suggested by the Commission of Agricultural Costs and Prices (CACP) for Indian states during the main cropping season. Result of the study shows that the evaluated average technical efficiency estimates have been found between 71 to 84 % for both type of labour. Factors i.e. use of seeds (77 % efficient), fertilizers (29 % inefficient), manure (3 % efficient), land, human (9 % efficient), attached (10 % efficient) and casual (103 % efficient) labor, animal labor (is between 1 to 4 % efficient), hired machine (33 % inefficient), owned machine (7 % efficient), insecticides (20 % efficient), irrigational cost (31 % efficient), fixed cost (36 % inefficient) and operational cost (197 % inefficient) have a significant at 1, 5 and 10 % level of significance1. 2020 DAV College. All rights reserved.
Dagar V.; Bansal E.; Murshed M.; Mishra V.; Alvarado R.; Kumar A.; Anser M.K.
International Journal of Agricultural and Statistical Sciences, Vol-16, No. 2, pp. 647-657.
Dagar V., Amity School of Economics (ASE), Amity University, Noida, 201 303, India; Bansal E., Janki Devi Memorial College, University of Delhi, New Delhi, 110 060, India; Murshed M., School of Business and Economics, North South University, Dhaka, 1209, Bangladesh; Mishra V., Department of Economics, Christ University, Bangalore, Karnataka, 560 076, India; Alvarado R., Carrera de Economia, Universidad Nacional de Loja, Loja, 110 150, Ecuador; Kumar A., Dept. of Economics and Public Policy, Central University of Himachal Pradesh, Dharamshala, Kangra, 176 215, India; Anser M.K., School of Public Administration, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710 055, China
Large power factors in wide band gap semiconducting rFeO3 materials for high-temperature thermoelectric applications
Boltzmann transport equation; Density functional theory; First-principles calculations; Orthoferrites; Thermoelectricity
While most of the thermoelectric materials work well only at low and mid temperatures, high-temperature thermoelectric materials (T > 900 K) are equally important for the operation of deep-spacecraft missions, nuclear reactors, and high-temperature industrial reactors. To accomplish this demand, this work provides insights into wide band gap semiconducting RFeO3 (rare-earth orthoferrites) for high-temperature thermoelectric applications. Using the first-principles density functional theory calculations, we have demonstrated the coexistence of extremely flat and corrugated flat bands near the Fermi region in a wide band gap material. The presence of such features enhances and sustains the thermopower, electrical conductivity, and power factor, which are the crucial factors for the efficiency of thermoelectric materials. Semiclassical Boltzmann formalism was then employed to study the transport properties of four orthorhombic RFeO3 materials (R = Pr, Nd, Sm, and Gd). Our results reveal high Seebeck coefficients (thermopower) along with the large electrical conductivities over the high hole doping carrier concentration and in the high-temperature region (T > 900 K). Furthermore, significantly large power factors are obtained with very low theoretical minimum lattice thermal conductivity in the range 1.41?1.51 W m?1 K?1. These huge power factors directly suggest the maximum power output in RFeO3, which we believe is a more appropriate performance index than the figure of merit, especially for high-temperature thermoelectric applications. We also emphasize that the outcomes of our work would be certainly useful for experimentalists in designing high-temperature thermoelectric materials. 2020 American Chemical Society
Panneerselvam I.R.; Baldo C., III; Sahasranaman M.; Murugesan S.; Rangaswamy N.; Rajendra Pai S.D.K.; Selvarathinam Y.
ACS Applied Energy Materials, Vol-3, No. 11, pp. 11193-11205.
https://doi.org/10.1021/acsaem.0c02128 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097106592&doi=10.1021%2facsaem.0c02128&partnerID=40&md5=4dea59d5ed80cde93ab2501d9fcf1be2
Panneerselvam I.R., Young Scientist Training Program Fellow, Asia Pacific Center for Theoretical Physics, Pohang, 37673, South Korea; Baldo C., III, Young Scientist Training Program Fellow, Asia Pacific Center for Theoretical Physics, Pohang, 37673, South Korea, Department of Physics, Mapua University, Manila, 1002, Philippines; Sahasranaman M., Chemistry Division, School of Advanced Sciences, Vellore Institute of Technology (VIT), Chennai, 600127, India; Murugesan S., PG and Research Department of Physics, Paavendhar College of Arts and Science, Salem, Tamil Nadu, 636121, India; Rangaswamy N., Division of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT), Chennai, 600127, India; Rajendra Pai S.D.K., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, Karnataka, 560029, India; Selvarathinam Y., Department of Physics, Loyola College of Arts and Science, Namakkal, Tamil Nadu, 636 202, India
Extending schizophrenia diagnostic model to predict schizotypy in first-degree relatives
Recently, we developed a machine-learning algorithm EMPaSchiz that learns, from a training set of schizophrenia patients and healthy individuals, a model that predicts if a novel individual has schizophrenia, based on features extracted from his/her resting-state functional magnetic resonance imaging. In this study, we apply this learned model to first-degree relatives of schizophrenia patients, who were found to not have active psychosis or schizophrenia. We observe that the participants that this model classified as schizophrenia patients had significantly higher schizotypal personality scores than those who were not. Further, the EMPaSchiz probability score for schizophrenia status was significantly correlated with schizotypal personality score. This demonstrates the potential of machine-learned diagnostic models to predict state-independent vulnerability, even when symptoms do not meet the full criteria for clinical diagnosis. 2020, The Author(s).
Kalmady S.V.; Paul A.K.; Greiner R.; Agrawal R.; Amaresha A.C.; Shivakumar V.; Narayanaswamy J.C.; Greenshaw A.J.; Dursun S.M.; Venkatasubramanian G.
https://doi.org/10.1038/s41537-020-00119-y https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097026109&doi=10.1038%2fs41537-020-00119-y&partnerID=40&md5=2adbe2c9d5fe1f75eb25c5e9a87f152c
Kalmady S.V., Alberta Machine Intelligence Institute, University of Alberta, Edmonton, AB, Canada, Canadian VIGOUR Centre, University of Alberta, Edmonton, AB, Canada; Paul A.K., Alberta Machine Intelligence Institute, University of Alberta, Edmonton, AB, Canada, Department of Computing Science, University of Alberta, Edmonton, AB, Canada; Greiner R., Alberta Machine Intelligence Institute, University of Alberta, Edmonton, AB, Canada, Department of Computing Science, University of Alberta, Edmonton, AB, Canada, Department of Psychiatry, University of Alberta, Edmonton, AB, Canada; Agrawal R., Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore, India; Amaresha A.C., Department of Sociology and Social Work, Christ- Deemed to be University Bangalore, Bangalore, India; Shivakumar V., Schizophrenia Clinic, Department of Psychiatry, National Institute of Mental Health and Neuro Sciences, Bangalore, India, Department of Integrative Medicine, National Institute of Mental Health and Neuro Sciences, Bangalore, India; Narayanaswamy J.C., Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore, India, Schizophrenia Clinic, Department of Psychiatry, National Institute of Mental Health and Neuro Sciences, Bangalore, India; Greenshaw A.J., Department of Psychiatry, University of Alberta, Edmonton, AB, Canada; Dursun S.M., Department of Psychiatry, University of Alberta, Edmonton, AB, Canada; Venkatasubramanian G., Translational Psychiatry Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neuro Sciences, Bangalore, India, Schizophrenia Clinic, Department of Psychiatry, National Institute of Mental Health and Neuro Sciences, Bangalore, India
Benzoyl hydrazine-anchored graphene oxide as supercapacitor electrodes
Aqueous electrolytes; Energy storage; Functional groups; Heteroatom
In this study, benzoyl-hydrazine anchored graphene oxide (BHGO) is synthesised using graphene oxide (GO) and benzoyl hydrazine (BH) via a simple, cost effective ultrasonic assisted chemical route. BH acted as a nitrogen source, reducing agent, and morphology modifier resulting in good electrochemical performance of BHGO. The supercapacitor behaviour of BHGO is investigated in different aqueous electrolytes and it exhibits a specific capacitance of 170 F g?1 at a current density of 1 A g?1 in 1 M H2SO4 and capacitive retention of 85% over 5000 cycles at 5 A g?1. This high performance is attributed to the enrichment of electroactive sites of GO through nitrogen moieties enhancing faradaic redox reactions and thereby the polarization at the electrode surface. 2020 Elsevier B.V.
Jose J.; Jose S.; Abinaya S.; Shaji S.; Sreeja P.B.
Materials Chemistry and Physics, Vol-256
https://doi.org/10.1016/j.matchemphys.2020.123666 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089466370&doi=10.1016%2fj.matchemphys.2020.123666&partnerID=40&md5=0a20bc1a7e4f63908dcf0a145826ab74
Jose J., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, Karnataka, India; Jose S., Nano Laboratory, School of Physics, Madurai Kamaraj University, Madurai, 625021, India; Abinaya S., Nano Laboratory, School of Physics, Madurai Kamaraj University, Madurai, 625021, India; Shaji S., Facultad de Ingenier Mecica y Eltrica, Universidad Automa de Nuevo Le, San Nicol de los Garza, 66455, Nuevo Le, Mexico; Sreeja P.B., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560029, Karnataka, India
Role of supramolecular interactions in crystal packing of Strandberg-type cluster-based hybrid solids
electrochemical behavior; Phosphomolybdate; Strandberg-type; supramolecular interactions
Abstract: Two new Strandberg-type cluster-based phosphomolybdates {H-2a3mp}5[{PO3(OH)}{PO4}Mo5O15], 1 and {H-2a4mp}5[{PO3(OH)}{PO4}Mo5O15]6H2O, 2 have been crystallized via solvent evaporation technique using 2-amino-3-methylpyridine (2a3mp) and 2-amino-4-methylpyridine (2a4mp) respectively. The solids were characterized using single-crystal X-ray diffraction, powder X-ray diffraction, fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and cyclic voltammetry. The solid 1 crystallized in monoclinic system with space group P21/c, a = 8.394(1), b = 27.398(6), c = 21.521(4) ? = 97.68(3), Z = 4. The solid 2 crystallized in triclinic system with space group P-1, a = 11.728(1), b = 14.234(1), c = 19.589(1) ? = 68.906(3), ? = 89.454(3), ? = 66.559(3), Z = 2. The solids 1 and 2 formed a supramolecular framework stabilized by hydrogen bonding interaction between cluster anions and organic moieties. CH? interactions between the organic moieties reinforced the crystal packing in 1 and 2. While crystal packing effects resulted in the formation of solvent-accessible voids in 1; aggregation of lattice water molecules in 2 facilitated the formation of pentameric water cluster. In addition, electrochemical behavior of 1 and 2 has also been investigated. Graphic abstract: Two new Strandberg-type cluster based phosphomolybdates, 1 and 2 have been crystallized via solvent evaporation technique using 2-amino-3-methylpyridine and 2-amino-4-methylpyridine. Detailed structural analysis revealed the role of supramolecular interactions in the crystal packing of these solids. In addition, electrochemical behavior of 1 and 2 has also been investigated.[Figure not available: see fulltext.] 2020, Indian Academy of Sciences.
Joseph J.; Winson C.; Singh B.; Jose J.; Thomas J.
Journal of Chemical Sciences, Vol-132, No. 1
Joseph J., Centre for Sustainability Science, Research & PG Department of Chemistry, St. Thomas College (Autonomous), Thrissur, 680 001, Kerala, India; Winson C., Centre for Sustainability Science, Research & PG Department of Chemistry, St. Thomas College (Autonomous), Thrissur, 680 001, Kerala, India; Singh B., Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110 016, India; Jose J., Department of Chemistry, CHRIST (Deemed to be University), Bengaluru, 560 029, India; Thomas J., Centre for Sustainability Science, Research & PG Department of Chemistry, St. Thomas College (Autonomous), Thrissur, 680 001, Kerala, India
Evaluation of Corrosion Mitigation Performance of 1-(3,4,5-Trimethoxyphenylmethylidene)-2-Naphthylamine (TMPNA) Schiffs Base on Carbon Steel Using Electrochemical, Thermodynamic and Theoretical Approaches
Adsorption isotherm; Carbon steel; Corrosion inhibitor; ENA; Naphthalene schiff base; QCA; Surface protection
A novel Schiff base,1-(3,4,5-trimethoxyphenylmethylidene)-2-naphthylamine(TMPNA) has been synthesized using naphthylamine and 3,4,5-trimethoxybenzaldehyde.The effective corrosion resistance and inhibition effect of TMPNA was studied at different concentrations in water medium on carbon steel by electrochemical techniques. The protective behavior of the passive film formed by the inhibitor was characterized through electrochemical impedance spectroscopy with an increased charge transfer resistance of 954 ?.cm2. The inhibition efficiency exhibited a gradual increase up to 92% with increase in schiff base concentration. Potentiodynamic polarization studies revealed that corrosion current decreased to 0.35 10?5A/cm2 with the addition of the inhibitor, TMPNA. Through various electrochemical studies such as impedance, polarization and electrochemical noise analysis (ENA), the concentration of TMPNA was optimized to 300ppm at which the maximum corrosion resistance was observed. Inhibition efficiency was found to decrease with increase in temperature. Also, the increased activation energy (Ea) value of 27kJ/mol confirmed that the inhibitor hindered the metal dissolution reaction. Adsorption of TMPNA on carbon steel/electrolyte interface was found to obey Langmuir adsorption isotherm. Scanning electron microscope (SEM) was used to evaluate the surface morphology. The Quantum chemical analysis (QCA) revealed that there was an electron transfer between TMPNA and the metal surface at ? 6.340eV. Molecular dynamic simulation study was carried out to investigate the adsorption of TMPNA on Fe (1 1 0) surface and adsorption energy value for the gaseous form was found to be ? 4197cal/mol. 2020, Springer Nature Switzerland AG.
Kannan P.; Varghese A.; Palanisamy K.; Abousalem A.S.; George L.
Journal of Bio- and Tribo-Corrosion, Vol-6, No. 4
Kannan P., Department of Chemistry, CHRIST (Deemed To Be University), Bengaluru, 560 029, Karnataka, India; Varghese A., Department of Chemistry, CHRIST (Deemed To Be University), Bengaluru, 560 029, Karnataka, India; Palanisamy K., Department of Chemistry, Srinivasan College of Arts and Science (Affiliated to Bharathidasan University, Trichy), Perambalur, 621 212, Tamil Nadu, India; Abousalem A.S., Chemistry Department, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt, Quality Control Lab, Operations Department, Jotun, Egypt; George L., Department of Chemistry, CHRIST (Deemed To Be University), Bengaluru, 560 029, Karnataka, India
A Study of Factors of Internet Addiction and Its Impact on Online Compulsive Buying Behaviour: Indian Millennial Perspective
Compulsive Buying Behaviour; Consumer behaviour; FOMO; internet addiction; millennial generation; psychological variables
Compulsive Buying occurs when a person indulges in excessive purchasing overcome by social pressures and negative emotions. The main objective in this study is to garner insights into this issue from a marketing perspective and also to understand whether the millennials preference to avoid social contact physically but to crave for it in a virtual space has an impact. Conducted over a seven-month period with data collected and analyzed from 202 respondents in Bangalore, the study revealed that emotions like loneliness, depression, low self-esteem and anxiety encourage the respondents to go ahead and maintain relationships in a virtual space rather than engage in face-to-face interactions. Furthermore, it was realized that the growing Internet Addiction can also be positively related to online Compulsive Buying. This study is of high significance as it allows marketers to reach out and capture that segment of elusive customers who are always online and are guaranteed to make a purchase. Therefore, allowing companies can align their marketing strategies accordingly develop products and services, resulting in better sales revenues and repeat purchases. 2019 International Management Institute, New Delhi.
Global Business Review, Vol-21, No. 6, pp. 1448-1465.
Suresh A.S., Institute of Management CHRIST (Deemed to be University), Bengaluru, Karnataka, India; Biswas A., Institute of Management, CHRIST (Deemed to be University), Kolkata, West Bengal, India
Experimental Investigations on the Thermal Diffusion Characteristics and Photoluminescence in Multiphase Micro Fluids Containing ZnO Micro Tubes and Fluorescein Dye
fluorescein; thermal diffusivity; thermal fluidics; thermal lens; ZnO micro tubes
Abstract: Scattering of light by disordered structures is normally detrimental to their applicability in many optoelectronic devices. However, some micro and nanostructures are useful in enhancing several optical and thermal properties like emission, heat diffusion etc. For this purpose, we have optimized the low temperature hydrothermal growth method for the ZnO micro tubes which leads to the growth of ZnO as mono dispersed micro tubes. Further, these samples were used to enhance the fluorescence efficiency of disordered media consisting of micro tubes of ZnO and fluorescein dye and to optimize the thermal diffusion of the mixture which will help us optimize the composition of these microscopic inclusions in designing a random lasing medium. Dual beam thermal lens method was used for this purpose. 2020, Pleiades Publishing, Ltd.
Optics and Spectroscopy, Vol-128, No. 12, pp. 2036-2045.
Frincy F., Department of Physics and Centre for Research, St. Teresas College (Autonomous), Ernakulam, 682011, India; Anila E.I., Departement of Physics and Electronics, CHRIST(Deemed to be University), Bengaluru, 560029, India; Santhi A.J., Department of Physics and Centre for Research, St. Teresas College (Autonomous), Ernakulam, 682011, India
Yulu: Moving Towards a Sustainable Future
Air pollution; economic sustainability; environmental sustainability; micro-mobility; social sustainability; traffic congestion; urban sustainability
The rapidly rising rate of urbanization, which is closely linked to economic growth, has exposed the world to several challenges such as inequality, environmental degradation, traffic congestion, infrastructural concerns and social conflicts. Therefore, urban sustainability has emerged as one of the most debatable discussions across the world. The existing network of transportation can no longer keep up with the growing demand in metropolitan cities. Short distance travel has become an unresolved issue for daily commuters. The case presents how MMVs have emerged as an alternative mode of transport for resolving issues of daily commuters regarding the first-mile connectivity, last-mile connectivity and short distance travel to reach their final destination. MMVs are basically light-weight vehicles which occupy less space on road. These vehicles include bicycles, e-bikes, skateboards, hoverboards and other battery-operated vehicles. The case narrates the journey of Yulu, a dockless bike-sharing venture which promoted the concept of green consumerism among the daily commuters at affordable rates. The venture initially started in the IT city of Bangalore and later expanded its operations to other cities such as Pune, Navi Mumbai, Gurugram and Bhubaneswar. The speciality of this venture is that it offers a sustainable solution to ever-increasing problems of traffic congestion and aggravating air pollution issues in metropolitan cities. Dilemma: How to offer a sustainable solution to the ever-increasing problem of traffic congestion and aggravating air pollution due to rising vehicular traffic? How to make short distance travel affordable and more convenient for daily commuters? Theory: Three pillars of sustainable development. Type of Case: Problem solving applied case. Protagonist: Present. Discussion and Case Questions: What strategies should be employed by the start-up to make it a more popular form of commute? How can the increasing rate of damage to the vehicles be brought down? How does organization structure and cluster management practices of Yulu help it to become more sustainable? How can the regulatory bodies and government promote and adopt such start-ups in their urban planning projects? 2020 SAGE Publications.
South Asian Journal of Business and Management Cases, Vol-9, No. 3, pp. 445-456.
Upadhyay D., Department of Commerce, CHRIST (Deemed to be University), Karnataka, Bangalore, India; Purswani G., Department of Commerce, CHRIST (Deemed to be University), Karnataka, Bangalore, India; Jain P., Department of Commerce, CHRIST (Deemed to be University), Karnataka, Bangalore, India
Humour as a moderator of stress and defence based coping mechanisms among the youth of Kerala, India
Adaptive humour; Defence based coping mechanisms; India; Kerala; Maladaptive humour stress; Youth
The goal of this study was to examine the effect of the moderators of adaptive and maladaptive humour on stress and on the four levels of defence based coping mechanism amongst the youth of Kerala, India. Four hundred and fifty-three youth between the age of 18 and 40, selected from two different cities of North Kerala, India (Calicut, Malappuram) and Central Kerala, India (Cochin, Trissur), were asked to fill out three questionnaires assessing stress, coping and humour. Pearson's test of product-moment correlation indicated that stress had a positive and moderate statistically significant correlation with the first three levels of defence based coping mechanism (pathological defences, immature defences and neurotic defences). Furthermore, there was a positive and weak statistically significant correlation between stress and level-IV coping (mature defences). When positive and moderate correlation was found for stress with maladaptive humour, no significant correlation was found with adaptive humour. When coping was studied in relationship with humour, a negative and weak statistically significant correlation was found for level-I coping (pathological defences) with adaptive humour, whereas a positive and moderate statistically significant correlation was found with maladaptive humour. Here level-IV coping (mature defences) was found to have a positive and moderate statistically significant relationship with adaptive and maladaptive humour. Moderator analysis showed that maladaptive humour moderated the association between stress and four levels of defence based coping mechanism. The study implied that youth should be trained to use more of mature means of coping and adaptive humour styles in life. Universiti Putra Malaysia Press
Pertanika Journal of Social Sciences and Humanities, Vol-28, No. 4, pp. 2547-2565.
All Open Access; Hybrid Gold Open Access
https://doi.org/10.47836/PJSSH.28.4.04 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099686094&doi=10.47836%2fPJSSH.28.4.04&partnerID=40&md5=87aab62e7c37da0ec9d1a131587ab728
George R., Centre for Advanced Research and Training [CART], CHRIST (Deemed to be University), Bangalore, Karnataka, 560029, India; Baby Shari P.A., Department of Psychology, University of Calicut, Kerala, 673635, India