A critical review focussing on the synthesis and applications of monoclinic yttrium oxide nanophosphor
Applications; B-type Y2O3; Bioimaging; Photoluminescence; Synthesis Routes
Research on monoclinic Y2O3 has been limited, not because of a lack of potential applications, but rather due to challenges associated with synthesizing phase-pure material. The limited understanding of the material and its properties has hindered researchers from further exploring this compound. Some studies suggest that the B-type polymorph of Y2O3 exhibits superior performance compared to its cubic counterpart. Additionally, there are reports indicating the existence of simple synthesis techniques that could potentially overcome the material's significant disadvantage highlighted by many researchers, namely, complex synthesis routes. To date, no comprehensive reports have summarized the key findings related to B-type Y2O3. In this effort, we aim to provide an exhaustive overview of research conducted on this polymorph. This includes an examination of diverse synthesis techniques employed by researchers, theoretical studies conducted on the material, an exploration of its luminescence properties, and an overview of various applications studied thus far. 2024 Elsevier Ltd
https://doi.org/10.1016/j.materresbull.2024.113128 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205735264&doi=10.1016%2fj.materresbull.2024.113128&partnerID=40&md5=de9a66d2e6f697e939426244bc0b2bb3
Nath S.G., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India; E I A., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Labelling of human breast cancer cells with PEG/biotin encapsulated B-type Y2O3: Eu nanophosphors for fluorescence detection
Fluorescence imaging; MCF 7 cells; PEG/biotin; Surface modification; Y2O3: Eu
The development of non-toxic quantum dots (QDs) for fluorescence labelling of cancer cells can bring significant advancements in the disease detection. Such findings can effectively replace the conventional toxic fluorescent probes by virtue of its tunable optical characteristics. Through this work, we present the development of an efficient fluorescent probe based on B-type Y2O3: Eu QDs for labelling MCF 7 cell lines. The QDs surface was encapsulated by poly ethylene glycol (PEG) along with tumour targeting ligand, biotin. The luminescence capability of the QDs were established through photoluminescence experiments. The QDs were tested to be non-toxic through MTT assay. Fluorescence detection experiments on MCF 7 cells using the nanophosphor established the material's potential to serve as an efficient probe for cancer cell detection. 2024 Elsevier B.V.
Nath S.G.; Jose J.; Bhat S.G.; Anila E.I.
Inorganic Chemistry Communications, Vol-169
https://doi.org/10.1016/j.inoche.2024.113100 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202891241&doi=10.1016%2fj.inoche.2024.113100&partnerID=40&md5=29dd59819bacb8a29c953067b308799f
Nath S.G., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India; Jose J., Division of Microbiology, Department of Biosciences, Rajagiri College of Social Sciences, Kalamassery, Kerala, Kochi, 683104, India; Bhat S.G., Cochin University of Science and Technology, Kerala, Thrikkakara, 682022, India; Anila E.I., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Folic Acid-Modified B-Type Y2O3:Eu3+ Quantum Dots: A Bright Approach to Fluorescence Imaging of Cancer Cells
cancer cell imaging; Eu doping; monoclinic yttria; PEG-folic acid capping; photoluminescence
Clinical applications of nanophosphors have gained extensive interest in research areas such as bioimaging and targeted drug delivery. The development of nontoxic semiconductor quantum dots (QDs), which can replace the conventional fluorescent probes, can bring significant developments in the bioimaging industry. This work reports the synthesis of monoclinic Y2O3:Eu QDs, without and with surface functionalization using PEG/folic acid at low temperature and its application in live cancer cell imaging. The synthesized quantum dots show sharp absorption in the short UV region and an intense red emission at 614 nm. Concentration-dependent optical properties are studied in detail, and color purity is measured. Transmission electron microscopy substantiates the monoclinic structure, crystalline nature, and the lower particle dimensions essential for the biological applications. The surface-modified sample is characterized for its structural and luminescence properties. Biocompatibility was ensured by performing MTT Assay on L6 skeletal muscle cell lines (normal) and MCF 7 cell lines (cancer) for the samples without and with surface modification, respectively. Fluorescence detection experiments on SKMEL cells using an uncapped sample prove the suitability of the material as a fluorescent probe. The effect of surface functionalization on imaging results was established by carrying out fluorescence detection experiments on MCF 7 cells using PEG-folic acid-functionalized sample, which resulted in enhanced cell uptake, specific binding, and bright fluorescence emission. Thus, this work authenticates the suitability of the material to be used as a reliable nanophosphor and an efficient fluorescent probe for imaging cancer cells. 2024 American Chemical Society.
ACS Applied Nano Materials, Vol-7, No. 17, pp. 21160-21169.
https://doi.org/10.1021/acsanm.4c04510 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201912258&doi=10.1021%2facsanm.4c04510&partnerID=40&md5=6e3bff9248ec837c636a07a0a5908459
Nath S.G., Optoelectronics and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India; Jose J., Department of Biosciences, Rajagiri College of Social Sciences, Kalamassery, Kerala, Kochi, 683104, India; Bhat S.G., Cochin University of Science and Technology, Kerala, Thrikkakara, 682022, India; Anila E.I., Optoelectronics and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Monoclinic yttrium oxide quantum dots surface modified by biotin for bioimaging applications
Biotin; Live cell imaging; Monoclinic yttria; Strong blue emission
Semiconductor nanoparticles or quantum dots are one of the central topics of interest in material science research due to its size dependent physical and chemical characteristics and applications in different areas from display to biomedical fields. This work reports the first-time synthesis of biotin functionalized monoclinic yttrium oxide quantum dots at low temperature and its application in live cell imaging. The presence of biotin was confirmed through FTIR measurements. HRTEM analysis confirmed the formation of small spherical quantum dots with an average size of 3.8 nm. Zeta potential measurements gave a negative surface charge of -26.9 mV confirming colloidal stability. The quantum dots show sharp absorption in the short UV region and PL experiments delivered defect related intense blue fluorescence emission. The material is nontoxic to both normal (L929) and cancer (MCF 7) cells and the live cell imaging experiments performed on MCF 7 cells show specific binding to the cells and presented bright fluorescence emission from the cells thus confirming the applicability of the material in both display industry and cancer cell imaging. 2023 Elsevier B.V.
Nath S.G.; Jose J.; Bins K.C.; Bhat S.G.; Anila E.I.
https://doi.org/10.1016/j.surfin.2023.103112 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85164364335&doi=10.1016%2fj.surfin.2023.103112&partnerID=40&md5=2156be17e533cf0e287f604a099d795a
Nath S.G., Optoelectronics and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India; Jose J., Cochin University of Science and Technology, Kerala, Thrikkakara, 682022, India, Department of Biosciences, Rajagiri College of Social Sciences, Kalamassery, Kerala, Kochi, 683104, India; Bins K.C., Cochin University of Science and Technology, Kerala, Thrikkakara, 682022, India; Bhat S.G., Cochin University of Science and Technology, Kerala, Thrikkakara, 682022, India; Anila E.I., Optoelectronics and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Kerala, Aluva, 683102, India, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India
Food innovation adoption and organic food consumerism-a cross national study between Malaysia and Hungary
Circular economy; Environmental concern; Food innovation adoption; Food security; Health consciousness; Organic foods consumerism
In order to meet the rising global demand for food and to ensure food security in line with the United Nations Sustainable Development Goal 2, technological advances have been introduced in the food production industry. The organic food industry has benefitted from advances in food technology and innovation. However, there remains skepticism regarding organic foods on the part of consumers, specifically on consumers acceptance of food innovation technologies used in the production of organic foods. This study measured factors that influence consumers food innovation adoption and subsequently their intention to purchase organic foods. We compared the organic foods purchase behavior of Malaysian and Hungarian consumers to examine differences between Asian and European consumers. The findings show food innovation adoption as the most crucial predictor for the intention to purchase organic foods in Hungary, while social lifestyle factor was the most influential in Malaysia. Other factors such as environmental concerns and health consciousness were also examined in relation to food innovation adoption and organic food consumerism. This paper discusses differences between European and Asian organic foods consumers and provides recommendations for stakeholders. 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Nathan R.J.; Soekmawati; Victor V.; Popp J.; Fekete-Farkas M.; Ol J.
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.3390/foods10020363 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102535018&doi=10.3390%2ffoods10020363&partnerID=40&md5=3efb25d40d34f4a95702fe1753a4f15a
Nathan R.J., Faculty of Business, Multimedia University, Jalan Ayer Keroh Lama, Melaka, 75450, Malaysia; Soekmawati, Faculty of Business, Multimedia University, Jalan Ayer Keroh Lama, Melaka, 75450, Malaysia; Victor V., Department of Economics, CHRIST (Deemed to be University), Hosur Road, Bengaluru, Karnataka, 560029, India; Popp J., Faculty of Economics and Social Sciences, Szent Istv University, Gl?, 2100, Hungary, TRADE Research Entity, North-West University, Vanderbijlpark, 1900, South Africa; Fekete-Farkas M., Faculty of Economics and Social Sciences, Szent Istv University, Gl?, 2100, Hungary; Ol J., TRADE Research Entity, North-West University, Vanderbijlpark, 1900, South Africa, Institute of Applied Informatics and Logistics, Faculty of Economics and Business, University of Debrecen, Debrecen, 4032, Hungary
FO-DPSO Algorithm for Segmentation and Detection of Diabetic Mellitus for Ulcers
diabetic wound; FO-DPSO; Foot ulcer; GLCM; Hoeffding tree; Nae Bayes
In recent days, the major concern for diabetic patients is foot ulcers. According to the survey, among 15 people among 100 are suffering from this foot ulcer. The wound or ulcer found which is found in diabetic patients consumes more time to heal, also required more conscious treatment. Foot ulcers may lead to deleterious danger condition and also may be the cause for loss of limb. By understanding this grim condition, this paper proposes Fractional-Order Darwinian Particle Swarm Optimization (FO-DPSO) technique for analyzing foot ulcer 2D color images. This paper deals with standard image processing, i.e. efficient segmentation using FO-DPSO algorithm and extracting textural features using Gray Level Co-occurrence Matrix (GLCM) technique. The whole effort projected results as accuracy of 91.2%, sensitivity of 100% and specificity as 96.7% for Nae Bayes classifier and accuracy of 91.2%, sensitivity of 100% and sensitivity of 79.6% for Hoeffding tree classifier. 2023 World Scientific Publishing Company.
International Journal of Image and Graphics, Vol-23, No. 3
Naveen J., CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Selvam S., BNM Institute of Technology, Karnataka, Bangalore, India; Selvam B., Anna University (BIT Campus), Tamil Nadu, Tiruchirappalli, India
Simulation and fabrication of tungsten oxide thin films for electrochromic applications
Electrochromism; Nano-pillars; Simulation; Sputtering; Transmittance; Tungsten oxide (WO3)
Electrochromics is the emerging technology that is used in sunlight control window glazing for buildings, automobiles and it can also control indoor climate through smart windows. Electrochromism is the mutable change in optical properties of an electrochromic material caused by redox reactions due to the application of voltage. Easy intercalating the H + ions on a dense electrochromic material (WO3) is the most important parameter as far as the reaction kinetics is concerned. The goal of our work is to improve the electrochemical response of electrochromic material by constructing nano-pillars rather than using dense electrochromic materials. Electrochemical performance of both the dense (planar) and porus (nano pillars) structures were simulated and experimentally proved with a systematic discussion in the present work. It is proven and shown here the increase in the electrochemical kinetics through easy diffusion of ions into the nanostructured electrochromic material. 2022 Elsevier B.V.
Naveen Kumar K.; Nithya G.; Shaik H.; Hemanth B.; Chethana M.; Kishore K.; Madhavi V.; Jafri R.I.; Sattar S.A.; Gupta J.; Ashok Reddy G.V.
https://doi.org/10.1016/j.physb.2022.413932 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131403965&doi=10.1016%2fj.physb.2022.413932&partnerID=40&md5=6d063d5ed6065b062618d89a5dc05fef
Naveen Kumar K., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Nithya G., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Shaik H., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Hemanth B., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Chethana M., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Kishore K., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Madhavi V., Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, 560012, India; Jafri R.I., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Sattar S.A., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Gupta J., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Ashok Reddy G.V., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Physics, SJB Institute of Technology, Kengeri, Bengaluru, 560060, India
On ion transport during the electrochemical reaction on plane and GLAD deposited WO3 thin films
Coloration efficiency; Diffusion coefficient; GLAD; Plane; Sputtering; Tungsten Oxide (WO3)
Tungsten oxide thin films were deposited on FTO and Corning glass substrates on Plane and GLAD (75) using DC magnetron sputtering and characterized using SEM, XRD, UVVis spectrophotometer, and Electrochemical analyzer systematically. Further, a comparative analysis was carried out in which it was observed that the result of surface morphology for plane showed the denser and GLAD showed nanopillars deposition. The amorphous nature of the sample was evident from XRD analysis. Optical transmittance was between 87% and 81% for both plane and GLAD. The Electrochemical studies showed the diffusion coefficient of H+ ions are more compared to Li+ ions for both plane and GLAD and Coloration efficiency was calculated at the scan rates of 10, 30, and 50 mV/s at the wavelength of 500 to 600 nm. 2021
Naveen Kumar K.; Shaik H.; Chandrashekar L.N.; Aishwarya P.; Abdul Sattar S.; Nithya G.; Madhavi V.; Imran Jafri R.; Gupta J.; Ashok Reddy G.V.
Materials Today: Proceedings, Vol-59, pp. 275-282.
https://doi.org/10.1016/j.matpr.2021.11.113 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131122384&doi=10.1016%2fj.matpr.2021.11.113&partnerID=40&md5=df5cfb8391c2b98425151c3bbd19d9b2
Naveen Kumar K., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Shaik H., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Chandrashekar L.N., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Aishwarya P., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Abdul Sattar S., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Nithya G., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Madhavi V., Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, 560012, India; Imran Jafri R., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Gupta J., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Ashok Reddy G.V., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Physics, SJB Institute of Technology, Kengeri, Bengaluru, 560060, India
Sputter deposited tungsten oxide thin films and nanopillars: Electrochromic perspective
Coloration efficiency; Glad; Partial pressures; Planar; Sputtering; Tungsten oxide (WO3)
Tungsten oxide (WO3) thin films and nano pillars were grown on FTO and corning substrates by using DC magnetron sputtering. Structural properties, surface morphology, optical properties, and electrochromic properties were systematically characterized by using SEM, XRD, UVVis Spectrometer, and Electrochemical Analyser respectively. Increased oxygen partial pressure resulted a rise in the optical transmittance from 72% to 89% at a wavelength of 600 nm. Moreover, coloration efficiency was also found to vary with partial pressures for both planar and glad from 30.48 cm2C-1 to 78.36 cm2C-1. We observe that glad deposited nano pillars showing higher coloration efficiency as compared to the planar thin film. The coloration efficiency found for the planar thin film and nano pillars at optimized partial pressure are 37.04 cm2C-1 and 78.36 cm2C-1 respectively. A strong influence of oxygen partial pressure and surface to volume ratio has been observed on the coloration efficiency, which can play a major role in the electrochromic application. 2022 Elsevier B.V.
Naveen Kumar K.; Shaik H.; Gupta J.; Sattar S.A.; Jafri R.I.; Pawar A.; Madhavi V.; G V A.R.; G N.
Materials Chemistry and Physics, Vol-278
https://doi.org/10.1016/j.matchemphys.2022.125706 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122638192&doi=10.1016%2fj.matchemphys.2022.125706&partnerID=40&md5=09a748c8c40e2ec1b1a8bfc77ec3b189
Naveen Kumar K., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Shaik H., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Gupta J., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Sattar S.A., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Jafri R.I., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Pawar A., Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Electronics and Communications Engineering, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Madhavi V., Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, 560012, India; G V A.R., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Physics, SJB Institute of Technology, Kengeri, Bengaluru, 560060, Karnataka, India; G N., Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Electronics and Communications Engineering, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India
Glancing angle sputter deposited tungsten trioxide (WO3) thin films for electrochromic applications
Coloration efficiency; Diffusion coefficient; Electrochromism; Glancing angle deposition; Transmittance; Tungsten oxide films
The columnar growth angle-dependent tungsten oxide (WO3) thin films were grown by using the Glancing angle sputter deposition (GLAD) technique with varying different substrate angles (00, 700, 750, and 800) on Fluorine-doped tin oxide (FTO) and Corning glass (CG) corning glass substrates at room temperature. The surface morphology, crystallographic structure, optical, and electrochemical properties were determined using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), UltravioletVisible(UVVis) spectrometer, and electrochemical analyzer, respectively. The structural properties reveal that the films are amorphous in nature. FE-SEM studies observed the columnar growth of the nano-rods and surface porosity. The optical transmittance of the deposited films was decreased from 83 to 78%, and the optical bandgap decreased from 3.08 to 2.88eV with increasing GLAD angle. The electrochemical studies reveal that the GLAD angle influenced the coloration efficiency (CE). The highest CE of 32cm2/C at 600nm and highest Diffusion coefficient (DC) of 6.529 109 cm2s?1 of the films was observed for the films deposited at an angle of 750. 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
Naveen Kumar K.; Shaik H.; Madhavi V.; Imran Jafri R.; Gupta J.; Nithya G.; Sattar S.A.; Ashok Reddy G.V.
Applied Physics A: Materials Science and Processing, Vol-128, No. 11
Springer Science and Business Media Deutschland GmbH
Naveen Kumar K., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India; Shaik H., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India; Madhavi V., Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore, 560012, India; Imran Jafri R., Department of Physics and Electronics, Christ University, Hosur Road, Bangalore, 560029, India; Gupta J., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India, Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India; Nithya G., Center for Nanomaterials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India, Department of ECE, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India; Sattar S.A., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India; Ashok Reddy G.V., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India, Department of Physics, SJB Institute of Technology, Kengeri, Karnataka, Bangalore, 560060, India
Effect of annealing and oxygen partial pressure on the RF sputtered WO3 thin films for electrochromic applications
Annealing; Partial pressures; RF magnetron sputtering; Transmittance; Tungsten oxide (WO3)
the electrochromic thin layer of Tungsten trioxide (WO3) was RF sputtered on FTO (fluorine-doped tin oxide) slide. In a reactive Ar + O2 gas environment with varying oxygen partial pressures, the deposition continued. The samples were air annealed at 400 C for 2 h after being deposited at room temperature. SEM, XRD, UVVisible spectrometer, and electrochemical analyzer characterization methods were employed to analyze the surface, structural morphology, optical, and electrochromic behaviour of the deposited material after annealing. The Optical Bandgap and Transmittance were found to be of a higher value for air annealed samples than RT deposited samples because RT deposited samples are amorphous whereas air annealed samples exhibit crystalline nature with Oxidation, reduction peak currents variation with respect to the temperature. 2021
Naveen Kumar K.; Shaik H.; Pawar A.; Chandrashekar L.N.; Sattar S.A.; Nithya G.; Imran Jafri R.; Madhavi V.; Gupta J.; Ashok Reddy G.V.
Materials Today: Proceedings, Vol-59, pp. 339-344.
https://doi.org/10.1016/j.matpr.2021.11.185 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122641951&doi=10.1016%2fj.matpr.2021.11.185&partnerID=40&md5=989dda4b46dfa7ad8be2903908b83126
Naveen Kumar K., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Shaik H., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Pawar A., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Chandrashekar L.N., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Sattar S.A., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Nithya G., Department of Electronics and Communication, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Centre for Nano-materials and MEMS, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Imran Jafri R., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Madhavi V., Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bengaluru, 560012, India; Gupta J., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India; Ashok Reddy G.V., Department of Physics, Nitte Meenakshi Institute of Technology, Yelahanka, Bengaluru, 560064, India, Department of Physics, SJB Institute of Technology, Kengeri, Bengaluru, 560060, India
Factor Analysis for Portfolio Returns: Investigating How Macroeconomic Factors Impact the Performance of the equity Portfolio
Economic Indicators; equity portfolio; regression analysis
This paper investigates the complex relationship between macroeconomic factors and equity portfolio performance using regression analysis. In today's volatile financial environment, it emphasizes the importance of understanding how variables such as interest rates, inflation, money supply and GDP influence investment outcomes. Exact statistical techniques and historical data from a specific time period are used to uncover hidden factors affecting portfolio returns, with a particular focus on interest rates, inflation, money supply, and GDP. The goal of the research is to provide a comprehensive understanding of how these macroeconomic factors influence the equity investments. 2024 IEEE.
Nawani A.; Khanra P.; Dhalwani S.; Birari A.
TQCEBT 2024 - 2nd IEEE International Conference on Trends in Quantum Computing and Emerging Business Technologies 2024
Institute of Electrical and Electronics Engineers Inc.
Nawani A., Christ University, India; Khanra P., Christ University, India; Dhalwani S., Christ University, India; Birari A., Christ University, India
Envisaging an Intelligent Blockchain Network by Intelligence Sharing
Blockchain; Machine Learning; Multi Layer Perceptron; Pre-trained Model; Weight matrices
Blockchain Technology is gaining popularity throughout various industry verticals due to its data decentralization and tamper-evident nature. Machine Learning (ML) is all about embedding a learning capability to computing machines so that the machine can learn based on historical data in a way how human beings learn things. An important part of ML is the process of learning which needs humongous processing capability and hence it is time-consuming. Significant benefits have been predicted from the integration of these two technologies. Making a complete blockchain network intelligent in a simple and efficient way is a major challenge. In this work, a Multi Layer Perceptron (MLP) model is implanted in every node of the blockchain network. An efficient technique is proposed to make an intelligent blockchain network in minimum possible time and using minimum processing power. During the network formation, every node of the network has knowledge of the model architecture. At some point in time, the model of the randomly selected node gets trained. After completion of the training of that node, the intelligence is replicated to the entire network. 2022 IEEE.
Nayak A.; De S.; Bhattacharyya S.; Mukhopadhyay D.; Muhammad K.; Gorbachev S.
2022 International Conference for Advancement in Technology, ICONAT 2022
Nayak A., Alumnus Software Limited, Kolkata, India; De S., Cooch Behar Govt. Engineering College, Dept. of Computer Science Engineering, Cooch Behar, India; Bhattacharyya S., Rajnagar Mahavidyalaya, Birbhum, India; Mukhopadhyay D., CHRIST (Deemed to Be University), Department of Computer Science and Engineering, Bangalore, India; Muhammad K., Sungkyunkwan University, Department of Applied Artificial Intelligence, Seoul, South Korea; Gorbachev S., National Research Tomsk State University, Department of Innovative Technologies, Tomsk, Russian Federation
A Low Voltage and Low Power Analog Multiplier
Analog Multipliers; flipped voltage follower; gilbert multiplier; low power; low voltage
In this research work, a low voltage analog multiplier has been realized through the utilization of a flipped voltage follower (FVF). The multiplier is characterized by its capacity to function at low power while exhibiting high gain. The exclusive use of transistors in its implementation renders it highly appropriate for fully integrated circuit applications. The multiplier has been developed using a supply voltage of 500 mV and an operating frequency of 25 KHz. The design consumes power of 8.23 uW. Moreover, a comparative study between the proposed multiplier and the conventional gilbert multiplier is presented in the paper. All simulations and layout designs have been conducted through the virtuoso analog design environment (ADE) of Cadence at 45 nm CMOS technology. 2023 IEEE.
Nayak A.G.; Bharath G.S.; Bhan I.; Mishra G.; Kumar V.
Proceedings of IEEE 2023 5th International Conference on Advances in Electronics, Computers and Communications, ICAECC 2023
Nayak A.G., BMS College of Engineering, Department of ECE, Bangalore, India; Bharath G.S., BMS College of Engineering, Department of ECE, Bangalore, India; Bhan I., BMS College of Engineering, Department of ECE, Bangalore, India; Mishra G., BMS College of Engineering, Department of ECE, Bangalore, India; Kumar V., Christ University, Department of ECE, Bangalore, India
Topic Modelling of ongoing conflict between Russia and Ukraine
LDA; Russia; Topic; Topic modelling; Ukraine
Online news sites provide hotspots to extract popular ratings and opinions on a wide range of topics. Realizing what individuals are referring to and understanding their concerns and suppositions is exceptionally significant to organizations and political missions. Furthermore, it is incredibly difficult to physically peruse such enormous volumes of data and gather the themes. Keeping in mind the prevailing plight of war-Torn nations such as the recent conflict between Russia and Ukraine. This study performs aims to perform topic modelling using LDA (Latent Dirichlet Allocation) and text analysis on datasets collected from various online news websites. To increase the accuracy and efficacy of the topic modelling, a comparative analysis is proposed that elevates the performance of machine learning models. This study also develops an algorithm where the entire process can be automated from the point of data collection to finding optimum array of topics in the given dataset. Searching for insights from the collected information can therefore become very tedious and time-consuming. Topic modelling was designed as a tool to organize, search, and understand vast quantities of textual information. The topic model using LDA was utilized to do a text analysis for this research. In the beginning, researchers have scraped a total of 1178 articles that covered the war conflict between Russia and Ukraine from December 1, 2021, to May 16, 2022. After that, researcher built the LDA model and modified hyper parameters based on the coherence score Cv that was used for the model evaluation technique. When using the most effective model, prominent topics, and representative documents pertaining to each topic, topic allocation among the documents, and potential enhancements are covered in the last section. 2022 IEEE.
2022 International Conference on Trends in Quantum Computing and Emerging Business Technologies, TQCEBT 2022
https://doi.org/10.1109/TQCEBT54229.2022.10041450 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149167575&doi=10.1109%2fTQCEBT54229.2022.10041450&partnerID=40&md5=9d4c1e5359bf1be2c13ae4aad3fbe56b
Nayak P., Liverpool John Moores University, Liverpool, United Kingdom; Lakshmi J.V.N., Patel Institute of Science and Management, Sunstone, Bangalore, India; Bhagat V.V., CHRIST (Deemed to Be University), India
Identifying the population of T-Tauri stars in Taurus: UVoptical synergy
Gaia; stars: HertzsprungRussell and CM diagrams; stars: kinematics and dynamics; stars: pre-main sequence
With the third data release of the Gaia mission, Gaia DR3 with its precise photometry and astrometry, it is now possible to study the behavior of stars at a scale never seen before. In this paper, we developed new criteria to identify T-Tauri stars (TTS) candidates using UV and optical color-magnitude diagrams (CMDs) by combining the GALEX and Gaia surveys. We found 19 TTS candidates and five of them are newly identified TTS in the Taurus molecular cloud (TMC), not cataloged before as TMC members. For some of the TTS candidates, we also obtained optical spectra from several Indian telescopes. We also present the analysis of distance and proper motion of young stars in the Taurus using data from Gaia DR3. We found that the stars in Taurus show a bimodal distribution with distance, having peaks at 130.17-1.241.31 pc and 156.25-5.001.86 pc. The reason for this bimodality, we think, is due to the fact that different clouds in the TMC region are at different distances. We further showed that the two populations have similar ages and proper motion distribution. Using the Gaia DR3 CMD, we showed that the age of Taurus is consistent with 1Myr. 2023, Indian Academy of Sciences.
Nayak P.K.; Narang M.; Puravankara M.; Tyagi H.; Banerjee B.; Sharma S.; Pandey R.; Surya A.; Mathew B.; Arun R.; Ujjwal K.; Kartha S.S.
Journal of Astrophysics and Astronomy, Vol-44, No. 2
Nayak P.K., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India, Institute of Astrophysics, Pontificia Universidad Catica de Chile, Av. Vicu MacKenna 4860, Santiago, 7820436, Chile; Narang M., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India, Academia Sinica Institute of Astronomy & Astrophysics, 11F of Astro-Math Bldg., No.1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan; Puravankara M., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India; Tyagi H., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India; Banerjee B., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India; Sharma S., Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital, 263001, India; Pandey R., Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital, 263001, India; Surya A., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai, 400005, India; Mathew B., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Arun R., Indian Institute of Astrophysics, 2nd Block Koramangala, Bangalore, 560034, India; Ujjwal K., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India
Routing TQM through HR strategies to achieve organizational effectiveness: themediating role of HR outcomes in India
Human resources (HR); Organisational effectiveness; Soft TQM-HR outcomes; Soft TQM-HR practices; Total quality management (TQM)
Purpose: The present research focuses on improving the awareness related to soft total quality management (TQM) practices by looking from the viewpoint of strategic human resources (HR). In addition, it is intended to reflect on the resulting soft TQM-HR outcomes and determine the mediating effect between soft TQM-HR strategies and organizational effectiveness (OE). Design/methodology/approach: An exploratory research methodology with an online survey technique was adopted for the study. Three hundred and three managerial-level personnel from nine large Indian manufacturing organizations participated in the research. A theoretical model is projected and verified using correlation and mediation analysis. Findings: The results show that commitment, reduced turnover intentions and satisfaction levels of employees mediate the relationship between resources, development and retention strategies and OE. However, the retention strategy has the strongest association with the OE of the three strategies. Also, of the three HR outcomes, satisfaction was strongly associated with OE. The analysis proved that the proposed model is an acceptable fit. Practical implications: Implementing HR-related TQM strategies will likely impact OE since it elicits positive HR outcomes such as commitment, reduced turnover intention and satisfaction. Recognizing human resources as a unique strategic asset will help HR managers devise adequate resourcing, development and retention strategies instrumental in executing TQM. Originality/value: The present micro study is unique in scrutinizing the influence of soft TQM-HR practices on organizational effectiveness by analysing the mediating effects of commitment, reduced turnover intention and satisfaction in Indian large-scale manufacturing organizations. The study is unique since no literature deciphers the linkages between HR strategies and organizational effectiveness in the Indian manufacturing sector. 2023, Emerald Publishing Limited.
TQM Journal, Vol-37, No. 2, pp. 289-318.
https://doi.org/10.1108/TQM-05-2023-0138 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85177699250&doi=10.1108%2fTQM-05-2023-0138&partnerID=40&md5=c08d706066d71d916a78f336d96b5fb1
Nayak S., School of Business and Management, Christ (Deemed to be University), Bangalore, India; Ganesh A., Department of Business Administration, St Joseph Engineering College, Mangalore, India; Bhat S., Department of Mechanical Engineering, St Joseph Engineering College, Mangalore, India; Kumar R., Department of Business Administration, St Joseph Engineering College, Mangalore, India
Joycean novels: A broad secularizing project
Ideology; Irish; Joyce; Language; Modernism; Nationalism; Post-secular; Race; Religion; Secular; Theology
This paper discusses how the Irish novelist James Joyce used the Novel form as an interface of religion and secularism in fiction. The secularism of his novels is a nuanced, complex project, as he was deeply haunted by the fabric of religious upbringing which he had only partially disowned. Joyce's works as well as life reflect an ambiguous relationship to religious texts, themes, and institutions. A non-teleological concept of modernity is what is present in the works of Joyce especially in his novels, A Portrait of the Artist as a Young Man and Ulysses. Here, the secular and the religious exist in an intimately antinomian, mutually defining opposition in many aspects of cultural life, including literature. 2015 Journal of Dharma: Dharmaram Journal of Religions and Philosophies (DVK, Bangalore), ISSN: 0253-7222.
Journal of Dharma, Vol-40, No. 1, pp. 49-66.
Dharmaram College, Centre for the Study of World Religions
Nayar A., Department of Theatre Studies, Christ University Bangalore, India
Becoming knowledge societies: A happiness framework for institutions of higher education in India
Ethics; Happiness Framework; Information Society; Knowledge Society; Pillars of Education; Satisfaction Survey; Subjective Well-Being; Sustainability
The transformation of Indian Higher Education Institutions (IHEIs) to knowledge societies require multiple coordinated interventions and actions on both the local and the global levels of institution administration, management, supply and demands of the economy and society. A vibrant knowledge society will not only require institutions support to plan and amend practices but also require the engagement of all stakeholders and the ability of individuals and society to imbibe new ways of thinking, working, and acting. It is vital to chart a direction and an approach that is in alignment with the local context and culture. At the supply front, IHEIs should initiate intervention programmes to enhance human capital through investment in a Happiness Framework and a shift in the workplace culture that requires conscious measures of intervention, which will drive institutional effectiveness and improve student experiences. This happiness framework should be integral and reinforced, first as an induction-training programme, and practised as institutional culture. Individuals, who are thus, trained at the local level of institutions, while participating in the global labour market with their increased skills and competencies will drive the IHEIs towards a fully functioning knowledge-based society. A knowledge-based society thus built to generate, disseminate, and use knowledge to improve the standard of living and the quality of life of citizens in an ethical and sustainable way will certainly make happiness as its ultimate goal and will focus on happiness as a process to improve efficiency and efficacy of the work force. 2019 Journal of Dharma: Dharmaram Journal of Religions and Philosophies (DVK, Bangalore),.
Journal of Dharma, Vol-44, No. 1, pp. 109-128.
Nayar A., CHRIST, Bangalore, India; Abraham V.M., CHRIST, Bangalore, India
The future of urban life: The technological and humanistic dimensions of cognitive cities
5G.; Big Data; Cognitive cities; Humanities; Internet of Things; Smart cities
A smart city implies realising sustainable city growth enabled by technology-based intelligent solutions to give its citizens a good quality of life. Information and communication technologies play a crucial role as the nerve centre of the smart city for collecting and analysing data from various sources, like mobile, social media, and sensors. The Internet of things (IoT) and big data (BD) also play a critical role in smart city infrastructures, changing how we analyse patterns and trends in human behaviour. Smart cities generate massive amounts of data and therefore need many flexible ways to process data and implement solutions. Recently, cognitive analytics have attracted the attention of researchers and practitioners worldwide as a technology-based innovative solution. It is a novel approach to information discovery and decision-making which uses multiple intelligent technologies such as statistical machine learning, deep learning, distributed artificial intelligence, natural language processing and visual pattern recognition to understand data and generate insights. A cognitive smart city refers to the convergence of emerging IoT and smart city technologies to realise cyber-physical social systems, their generated big data from sensing to communication and computing, and artificial intelligence techniques for all aspects of collaborative computing in sensors, actuators and human-machine interfaces. The field of humanities typically approaches the concept of cognitive cities from a cultural, philosophical, and humanistic perspective. Humanities scholars examine how cities shape our thoughts, beliefs, values, and experiences and how they impact our collective memory and identity. They consider the role of cities as sites of cultural production and consumption and explore the social and political implications of urbanisation and technological advancement. This paper aims to highlight the connection between technology and the humanities in the context of cognitive cities. The paper will explore the technological aspects of cognitive cities and their cultural, humanistic, and philosophical implications. 2023 Author(s).
AIP Conference Proceedings, Vol-2763, No. 1
https://doi.org/10.1063/5.0158543 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85176732824&doi=10.1063%2f5.0158543&partnerID=40&md5=b0dc319ae71a8c1f03223b9b7bc44ade
Nayar C.V.A., CHRIST University, Bangalore, 560029, India; Raj B.R., WIPRO Ltd, Bangalore, 560100, India