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Your search keyword '"Maharana, G."' showing total 4 results
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4 results on '"Maharana, G."'

1. New characterizations of the diamond partial order

Author

Ferreyra, D. E., Levis, F. E., Maharana, G., and Orquera, V.

Subjects
Mathematics - Rings and Algebras, 15A09, 06A06, 15B57
Abstract

Baksalary and Hauke introduced the diamond partial order in 1990, which we revisit in this paper. This order was defined on the set of rectangular matrices and is the same as the star and minus partial orders for partial isometries. New ways of describing and studying the diamond partial order are being looked into in this paper. Particularly, we present a new characterization by using an additivity property of the column spaces. Additionally, we also study the relationship between the left (resp., right) star and diamond partial orders. Specifically, we obtain conditions in which the diamond partial order means the left (resp., right) star partial order. The reverse order law for the Moore-Penrose inverse is characterized when $A$ is below $B$ under the diamond partial order. Finally, an interesting way of describing bi-dagger matrices is found.

Published
2024

2. G-Drazin inverse combined with inner inverse

Author

Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Ministerio de Ciencia e Innovación, Universidad Nacional de Río Cuarto, Universidad Nacional del Sur - Argentina, Universidad Nacional de La Pampa, Argentina, Science and Engineering Research Board, India, Maharana, G., Sahoo, J. K., Thome, Néstor, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Ministerio de Ciencia e Innovación, Universidad Nacional de Río Cuarto, Universidad Nacional del Sur - Argentina, Universidad Nacional de La Pampa, Argentina, Science and Engineering Research Board, India, Maharana, G., Sahoo, J. K., and Thome, Néstor

Abstract

[EN] This article introduces new classes of generalized inverses for square matrices named GD1, and the dual, called 1GD inverse. In addition, we discuss a few characterizations and representations of these inverses. The explicit expressions of these inverses have been established via core-nilpotent decomposition. Further, we introduce a binary relation for GD1 inverse and 1GD inverse, along with a few derived properties.

Published
2024

4. Defect-mediated time-efficient photocatalytic degradation of methylene blue and ciprofloxacin using tungsten-incorporated ternary perovskite BaSnO 3 nanoparticles.

Author

Jayavelu Y, Maharana G, Rajender G, Muniramaiah R, Divyadharshini S, Baby BH, Kovendhan M, Fernandes JM, and Joseph DP

Subjects
Methylene Blue chemistry, Tungsten chemistry, Ciprofloxacin chemistry, Nanoparticles chemistry, Oxides, Titanium, Calcium Compounds
Abstract

Photocatalytic water purification has been extensively explored for its economic, eco-friendly, and sustainable aspects. In this study, tungsten (W) incorporated BaSn 1-x W x O 3 (x = 0 to 0.05) nanoparticles synthesized by facile hydrogen peroxide precipitation route has been demonstrated for photocatalytic degradation of methylene blue (MB) dye and ciprofloxacin (CIP) antibiotic. The structural analysis indicates the presence of hybrid composite-like nanostructures with reduced crystallinity. Optical studies reveal blueshift in bandgap and decrease in oxygen vacancy defects upon W-incorporation. Pure BaSnO 3 shows overall enhanced photocatalytic activity towards MB (90.22%) and CIP (78.12%) after 240 min of white LED light and sunlight irradiation respectively. The 2 % W-incorporated BaSnO 3 shows superior photocatalytic degradation of MB (26.89%) and CIP (45.14%) within first 30 min of irradiation confirming the presence of W to be beneficial in the process. The free radical study revealed the dominant role of reactive hole (h + ) and oxygen radical (O 2 •- ) species during photodegradation and their intermediates are investigated to elucidate the degradation mechanism of MB within 30 min of irradiation. This study is promising towards developing defect mediated and time-efficient photocatalysts for environmental remediation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

Published
2024
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