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Journal articles on the topic 'Ramani'

Author: Grafiati

Published: 18 May 2024

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1

Chai, Xue-Dong, and Chun-Xia Li. "The integrability of the coupled Ramani equation with binary Bell polynomials." Modern Physics Letters B 34, no. 32 (August 15, 2020): 2050371. http://dx.doi.org/10.1142/s0217984920503716.

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Binary Bell polynomial approach is applied to study the coupled Ramani equation, which is the generalization of the Ramani equation. Based on the concept of scale invariance, the coupled Ramani equation is written in terms of binary Bell polynomials of two dimensionless field variables, which leads to the bilinear coupled Ramani equation directly. As a consequence, the bilinear Bäcklund transformation, Lax pair and conservation laws are systematically constructed by virtue of binary Bell polynomials.

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2

LI, JIBIN. "EXISTENCE OF EXACT FAMILIES OF TRAVELING WAVE SOLUTIONS FOR THE SIXTH-ORDER RAMANI EQUATION AND A COUPLED RAMANI EQUATION." International Journal of Bifurcation and Chaos 22, no. 01 (January 2012): 1250002. http://dx.doi.org/10.1142/s0218127412500022.

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By using the method of dynamical systems and the results in [Li & Zhang, 2011] to the sixth-order Ramani equation and a coupled Ramani equation, the families of exact traveling wave solutions can be obtained.

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3

Chen, Junchao, Bao-Feng Feng, and Yong Chen. "Bilinear Bäcklund transformation, Lax pair and multi-soliton solution for a vector Ramani equation." Modern Physics Letters B 31, no. 12 (April 27, 2017): 1750133. http://dx.doi.org/10.1142/s0217984917501330.

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In this paper, a vector Ramani equation is proposed by using the bilinear approach. With the help of the bilinear exchange formulae, bilinear Bäcklund transformation and the corresponding Lax pair for the vector Ramani equation are derived. Besides, multi-soliton solution expressed by pfaffian is given and proved by pfaffian techniques.

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4

Wazwaz, Abdul-Majid, and Houria Triki. "Multiple soliton solutions for the sixth-order Ramani equation and a coupled Ramani equation." Applied Mathematics and Computation 216, no. 1 (March 2010): 332–36. http://dx.doi.org/10.1016/j.amc.2010.01.067.

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5

Saleh, R., A. S. Rashed, and Abdul-Majid Wazwaz. "Plasma-waves evolution and propagation modeled by sixth order Ramani and coupled Ramani equations using symmetry methods." Physica Scripta 96, no. 8 (May 26, 2021): 085213. http://dx.doi.org/10.1088/1402-4896/ac0075.

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6

Watts, Geoff. "Ramani Moonesinghe: anaesthetist with a perioperative vision." Lancet 393, no. 10180 (April 2019): 1495. http://dx.doi.org/10.1016/s0140-6736(19)30802-5.

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7

Wazwaz, Abdul-Majid. "A coupled Ramani equation: multiple soliton solutions." Journal of Mathematical Chemistry 52, no. 8 (June 8, 2014): 2133–40. http://dx.doi.org/10.1007/s10910-014-0372-7.

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8

Ya-Xuan, Yu. "Supersymmetric Sawada–Kotera–Ramani Equation: Bilinear Approach." Communications in Theoretical Physics 49, no. 3 (March 2008): 685–88. http://dx.doi.org/10.1088/0253-6102/49/3/35.

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9

Zhao, Jun-Xiao, and Hon-Wah Tam. "Soliton solutions of a coupled Ramani equation." Applied Mathematics Letters 19, no. 4 (April 2006): 307–13. http://dx.doi.org/10.1016/j.aml.2005.01.006.

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10

Li, Nianhua, and Binfang Gao. "Hamiltonian structures of a coupled Ramani equation." Journal of Mathematical Analysis and Applications 453, no. 2 (September 2017): 908–16. http://dx.doi.org/10.1016/j.jmaa.2017.04.043.

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11

RACHANA, R. R., and R. VARATHARAJAN. "A new species of the genus Bregmatothrips (Thysanoptera: Thripidae) from the Andaman Islands of India." Zootaxa 4317, no. 3 (September 5, 2017): 597. http://dx.doi.org/10.11646/zootaxa.4317.3.13.

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Bregmatothrips ramani sp.n. is described from the Andaman Islands, India. This is the third member of the genus Bregmatothrips with forked sense cones on antennal segments III and IV, and a key is presented to distinguish these species.

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12

Roshid, Harun-Or, and Md Nur Alam. "Multi-Soliton Solutions to Nonlinear Hirota-Ramani Equation." Applied Mathematics & Information Sciences 11, no. 3 (May 1, 2017): 723–27. http://dx.doi.org/10.18576/amis/110311.

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13

Gächter, Othmar. "Ramani, Shakuntala: Kalamkari and Traditional Design Heritage of India." Anthropos 104, no. 1 (2009): 246–48. http://dx.doi.org/10.5771/0257-9774-2009-1-246-1.

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14

Wazwaz, Abdul-Majid. "Multiple soliton solutions for a new coupled Ramani equation." Physica Scripta 83, no. 1 (December 3, 2010): 015002. http://dx.doi.org/10.1088/0031-8949/83/01/015002.

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15

Subramanian, Ramesh. "S. Ramani (1939‐present): India's information technology education pioneer." European Business Review 19, no. 2 (March 13, 2007): 160–73. http://dx.doi.org/10.1108/09555340710730119.

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16

Arafa, Anas A. M., and Ahmed M. SH Hagag. "A new analytic solution of fractional coupled Ramani equation." Chinese Journal of Physics 60 (August 2019): 388–406. http://dx.doi.org/10.1016/j.cjph.2019.05.011.

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17

Orfino, Francesco P., Yadvinder Singh, Dilip Ramani, Robin T. White, Sebastian Eberhardt, Yixuan Chen, Jonas Stoll, Monica Dutta, and Erik Kjeang. "Polymer Electrolyte Fuel Cell Degradation Investigations Using X-Ray Computed Tomography." ECS Meeting Abstracts MA2022-01, no. 41 (July 7, 2022): 2508. http://dx.doi.org/10.1149/ma2022-01412508mtgabs.

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On-going research is aimed at commercializing low temperature fuel cell technology systems as zero emission alternatives for automotive applications in order to reduce greenhouse gas emissions and air pollution. These systems use polymer electrolyte fuel cells (PEFCs) to generate electricity via an electrochemical process using hydrogen and ambient air (oxygen) to produce water. Advantages of PEFCs include quick start-up time, low operating temperature, low weight, high efficiency, and relatively simple design. An important area of current research is the identification of factors which affect fuel cell performance degradation during operation and ultimately, its durability. A technique that has yielded new insights in the investigation and identification of failure modes in fuel cells is lab-based X-ray computed tomography (XCT), which is most advantageous due to its on-demand availability. The Fuel Cell Research Laboratory (FCReL) at Simon Fraser University currently operates Canada’s only facility for multi-length scale XCT, comprising of two state-of-the-art laboratory-based XCT scanners from Carl Zeiss X-ray Microscopy (Zeiss Xradia 520 Versa and 810 Ultra) with complementary resolution and field of view capabilities. This unique combination offers unprecedented access to investigations at multi length scales; with an ability to probe fuel cell components at the micro as well as the nano scale. Figure 1 illustrates the fuel cell holder and its orientation with respect to the X-ray beam as well as an exploded view of the miniature fuel cell design. An overview of recent fuel cell degradation investigations at FCReL using the XCT technique will be shown. The XCT based workflow facilitates determination and quantification of material structure and properties changes resulting from degradation stresses associated with operational parameters such as temperature, relative humidity, and voltage. The non-destructive nature of lab-based XCT visualization coupled with the ability to scan the same fuel cell multiple times without inducing damage [1] has enabled detailed studies of fuel cell degradation evolution in four dimensions (3D space, 1D time) [2 - 4]. The new knowledge gained from this procedure has led to root cause identification with respect to membrane and catalyst layer crack initiation and propagation [5 - 7], sealing issues [8,9], and subsequent mitigation toward enhanced fuel cell durability. Acknowledgement This research was supported by the Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Western Economic Diversification Canada, Canada Research Chairs, and Ballard Power Systems. References: [1] R.T. White, M. Najm, M. Dutta, F.P. Orfino, E. Kjeang, J. Electrochem. Soc. 163 (2016) F1206-F1208 [2] R.T. White, A. Wu, M. Najm, F.P. Orfino, M. Dutta, E. Kjeang, J. Power Sources 350 (2017) 94-102 [3] R. T. White, S. H. Eberhardt, Y. Singh, T. Haddow, M. Dutta, F. P. Orfino, E. Kjeang, Scientific Reports, (2019) 9:1843 [4] R. T. White, D. Ramani, S. H. Eberhardt, M. Najm, F. P. Orfino, M. Dutta, and E. Kjeang, J. Electrochem Soc, 166 (2019) F914-F925 [5] Y. Singh, R. T. White, M. Najm, T. Haddow, V. Pan, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 412 (2019) 224 [6] D. Ramani, Y. Singh, R. T. White, M. Wegener, F. P. Orfino, M. Dutta, and E. Kjeang, International Journal of Hydrogen Energy, 45 (2020) 10089-10103 [7] D. Ramani, Y. Singh, R. T. White, T. Haddow, M. Wegener, F. P. Orfino, L. Ghassemzadeh, M. Dutta, and E. Kjeang, Electrochimica Acta 380 (2021) 138194 [8] Y. Chen, Y. Singh, D. Ramani, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 520 (2022) 230674 [9] Y. Chen, Y. Singh, D. Ramani, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 520 (2022) 230673 [10] J. Stoll, F. P. Orfino, M. Dutta, and E. Kjeang, J. Electrochem Soc, (2021) 168 024516 Figure 1

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18

Palackal, Joseph J. "Lotus Signatures: Dr. N. Ramani, Flute, and Trichy Sankaran, Mrdangam." Yearbook for Traditional Music 30 (1998): 207. http://dx.doi.org/10.2307/768616.

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19

Nadjafikhah, Mehdi, and Vahid Shirvani-Sh. "Lie symmetries and conservation laws of the Hirota–Ramani equation." Communications in Nonlinear Science and Numerical Simulation 17, no. 11 (November 2012): 4064–73. http://dx.doi.org/10.1016/j.cnsns.2012.02.032.

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20

LI, JIBIN, and YI ZHANG. "HOMOCLINIC MANIFOLDS, CENTER MANIFOLDS AND EXACT SOLUTIONS OF FOUR-DIMENSIONAL TRAVELING WAVE SYSTEMS FOR TWO CLASSES OF NONLINEAR WAVE EQUATIONS." International Journal of Bifurcation and Chaos 21, no. 02 (February 2011): 527–43. http://dx.doi.org/10.1142/s0218127411028581.

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For the Lax KdV5 equation and the KdV–Sawada–Kotera–Ramani equation, their corresponding four-dimensional traveling wave systems are studied by using Congrove's method. Exact explicit gap soliton, embedded soliton, periodic and quasi-periodic wave solutions are obtained. The existence of homoclinic manifolds to three kinds of equilibria including a hyperbolic equilibrium, a center-saddle and an equilibrium with zero pair of eigenvalues is revealed. The bifurcation conditions of equilibria are given.

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21

Abazari, Reza, and Rasoul Abazari. "Hyperbolic, Trigonometric, and Rational Function Solutions of Hirota-Ramani Equation via -Expansion Method." Mathematical Problems in Engineering 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/424801.

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The -expansion method is proposed to construct the exact traveling solutions to Hirota-Ramani equation: , where . Our work is motivated by the fact that the -expansion method provides not only more general forms of solutions but also periodic and solitary waves. If we set the parameters in the obtained wider set of solutions as special values, then some previously known solutions can be recovered. The method appears to be easier and faster by means of a symbolic computation system.

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22

Chakraborty, Alisa, and Christopher G. Arges. "Assessing Free Radical Scavenging Activity of Various Cerium Materials for Proton Exchange Membrane Fuel Cells Using Fluorescence Spectroscopy Presentation Format." ECS Meeting Abstracts MA2022-02, no. 41 (October 9, 2022): 1523. http://dx.doi.org/10.1149/ma2022-02411523mtgabs.

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Proton-exchange membrane fuel cells (PEMFCs) are an electrochemical energy conversion device that only has water vapor as an emission. During fuel cell operation, the PEM undergoes mechanical, thermal, and chemical degradation. The chemical degradation is attributed to reactive oxygen species (ROS) that are generated in situ through both chemical and electrochemical pathways during fuel cell operation. Hydrogen peroxide (H2O2) is a reactive oxygen species (ROS) and is often an intermediate formed in the presence of transition metal ion like Fe2+ or Fe3+. The free radical ROS mainly hydroxyl and hydroperoxyl radicals initiate oxidative degradation of both the PEM backbone and the side chains that contain ionic groups that are essential for ion conduction. In this study, various types of free radical scavenger (FRS) additives’ free radical scavenging activity are assessed using ex-situ and in-situ fluorescence spectroscopy(1, 2). Some of FRS materials studied are cerium oxide and doped ceria salts. The scavenging ability of the FRS materials were related to their physio-chemical properties – which were assessed by XPS, SEM, and dynamic light scattering (zetasizer). V. Prabhakaran, C. G. Arges and V. Ramani, Proceedings of the National Academy of Sciences of the United States of America, 109, 1029 (2012). V. Prabhakaran, C. G. Arges and V. Ramani, Phys Chem Chem Phys, 15, 18965 (2013).

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23

He, Yi, and Hon-Wah Tam. "Bilinear Bäcklund transformation and Lax pair for a coupled Ramani equation." Journal of Mathematical Analysis and Applications 357, no. 1 (September 2009): 132–36. http://dx.doi.org/10.1016/j.jmaa.2009.04.006.

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24

Li, Wei, Wenting Li, Fei Wang, and Hongqing Zhang. "Differential invariants for Hirota–Ramani equation and Drinfel’d–Sokolov–Wilson system." Communications in Nonlinear Science and Numerical Simulation 18, no. 4 (April 2013): 888–94. http://dx.doi.org/10.1016/j.cnsns.2012.08.028.

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25

Zhang, Yingnan, Xingbiao Hu, and Jianqing Sun. "Numerical calculation of N -periodic wave solutions to coupled KdV–Toda-type equations." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 477, no. 2245 (January 2021): 20200752. http://dx.doi.org/10.1098/rspa.2020.0752.

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In this paper, we study the N -periodic wave solutions of coupled Korteweg–de Vries (KdV)–Toda-type equations. We present a numerical process to calculate the N -periodic waves based on the direct method of calculating periodic wave solutions proposed by Akira Nakamura. Particularly, in the case of N = 3, we give some detailed examples to show the N -periodic wave solutions to the coupled Ramani equation, the Hirota–Satsuma coupled KdV equation, the coupled Ito equation, the Blaszak–Marciniak lattice, the semi-discrete KdV equation, the Leznov lattice and a relativistic Toda lattice.

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26

Wazwaz, Abdul-Majid, Ma’mon Abu Hammad, Ali O. Al-Ghamdi, Mansoor H. Alshehri, and Samir A. El-Tantawy. "New (3+1)-Dimensional Kadomtsev–Petviashvili–Sawada– Kotera–Ramani Equation: Multiple-Soliton and Lump Solutions." Mathematics 11, no. 15 (August 3, 2023): 3395. http://dx.doi.org/10.3390/math11153395.

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In this investigation, a novel (3+1)-dimensional Lax integrable Kadomtsev–Petviashvili–Sawada–Kotera–Ramani equation is constructed and analyzed analytically. The Painlevé integrability for the mentioned model is examined. The bilinear form is applied for investigating multiple-soliton solutions. Moreover, we employ the positive quadratic function method to create a class of lump solutions using distinct parameters values. The current study serves as a guide to explain many nonlinear phenomena that arise in numerous scientific domains, such as fluid mechanics; physics of plasmas, oceans, and seas; and so on.

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27

Fan, Engui. "Supersymmetric KdV–Sawada–Kotera–Ramani equation and its quasi-periodic wave solutions." Physics Letters A 374, no. 5 (January 2010): 744–49. http://dx.doi.org/10.1016/j.physleta.2009.11.071.

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28

He, Bin, and Qing Meng. "Bilinear form and new interaction solutions for the sixth-order Ramani equation." Applied Mathematics Letters 98 (December 2019): 411–18. http://dx.doi.org/10.1016/j.aml.2019.06.036.

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29

Duran, Serbay. "Exact Solutions for Time-Fractional Ramani and Jimbo—Miwa Equations by Direct Algebraic Method." Advanced Science, Engineering and Medicine 12, no. 7 (July 1, 2020): 982–88. http://dx.doi.org/10.1166/asem.2020.2663.

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In this study, the analytical solutions of some nonlinear time-fractional partial differential equations are investigated by the direct algebraic method. The nonlinear fractional partial differential equation (NLfPDE) which is based on the fractional derivative (fd) in the sense of modified Riemann-Liouville derivative is transformed to the nonlinear non-fractional ordinary differential equation. The hyperbolic and rational functions which are contained solutions are obtained for the sixth-order time-fractional Ramani equation and time-fractional Jimbo—Miwa equation (JME) with the help of this technique. In addition, this method can be applied to higher order and higher dimensional NLfPDEs. Finally, three dimensional simulations of some solutions are given.

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30

Syahadah, Fadhmah, and Nadwah Haji Daud. "الاستعارة بين الرماني وسيّد قطب في القرآن الكريم: دراسة مقارنة." Studia Quranika 8, no. 2 (February 7, 2024): 349–66. http://dx.doi.org/10.21111/studiquran.v8i2.9486.

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This study, Metaphor between Al-Rumani and Sayyid Qutb in the Holy Qur'an: A Comparative Study, compared Sayyid Qutb, a well-known modern writer, with Al-Rumani, an older writer, in order to emphasize the metaphor technique. The study's approach will be twofold: first, it will define the terms "statement" and "metaphor," and then it will adopt an analytical approach by analyzing the metaphor used in the Holy Quran by Al-Ramani and Sayyid Qutb. The study's conclusions and their differences indicate that these two scholars agree that rhetoric—and metaphor in particular—is a crucial component of miracles in the Holy Qur'an. They use various methods and passages from the Holy Qur'an to explain metaphors in different ways.

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31

Aliyu, Aliyu, Mustafa Inc, Abdullahi Yusuf, and Dumitru Baleanu. "Symmetry Analysis, Explicit Solutions, and Conservation Laws of a Sixth-Order Nonlinear Ramani Equation." Symmetry 10, no. 8 (August 15, 2018): 341. http://dx.doi.org/10.3390/sym10080341.

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In this work, we study the completely integrable sixth-order nonlinear Ramani equation. By applying the Lie symmetry analysis technique, the Lie point symmetries and the optimal system of one-dimensional sub-algebras of the equation are derived. The optimal system is further used to derive the symmetry reductions and exact solutions. In conjunction with the Riccati Bernoulli sub-ODE (RBSO), we construct the travelling wave solutions of the equation by solving the ordinary differential equations (ODEs) obtained from the symmetry reduction. We show that the equation is nonlinearly self-adjoint and construct the conservation laws (CL) associated with the Lie symmetries by invoking the conservation theorem due to Ibragimov. Some figures are shown to show the physical interpretations of the acquired results.

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32

Dimitrova, Zlatinka I., and Kaloyan N. Vitanov. "Integrability of Differential Equations with Fluid Mechanics Application: from Painleve Property to the Method of Simplest Equation." Journal of Theoretical and Applied Mechanics 43, no. 2 (June 1, 2013): 31–42. http://dx.doi.org/10.2478/jtam-2013-0012.

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Abstract We present a brief overview of integrability of nonlinear ordinary and partial differential equations with a focus on the Painleve property: an ODE of second order possesses the Painleve property if the only movable singularities connected to this equation are single poles. The importance of this property can be seen from the Ablowitz-Ramani- Segur conhecture that states that a nonlinear PDE is solvable by inverse scattering transformation only if each nonlinear ODE obtained by ex- act reduction of this PDE possesses the Painleve property. The Painleve property motivated much research on obtaining exact solutions on non- linear PDEs and leaded in particular to the method of simplest equation. A version of this method called modified method of simplest equation is discussed below.

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33

Hu, Xing-Biao, Dao-Liu Wang, and Hon-Wah Tam. "Lax pairs and Bäcklund transformations for a coupled Ramani equation and its related system." Applied Mathematics Letters 13, no. 6 (August 2000): 45–48. http://dx.doi.org/10.1016/s0893-9659(00)00052-5.

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34

Ahmed, Sheikh Imran Uddin, Daniel Torres, Mohamed Shahid Usen Nazreen, and Shrihari Sankarasubramanian. "(Digital Presentation) Tailoring Solvation and Counterion Complexation in the Electrolyte for Enhanced Titanium Redox Flow Battery Performance." ECS Meeting Abstracts MA2022-02, no. 29 (October 9, 2022): 2463. http://dx.doi.org/10.1149/ma2022-02292463mtgabs.

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The use of titanium (Ti) in redox flow batteries (RFBs) is of increasing interest as Ti is 100x as abundant[1] worldwide as vanadium (V) with a 10x lower cost of production. The half-cell potential of the Ti4+/Ti3+ redox couple is 0.1 V (vs. SHE) as compared to -0.26 V (vs. SHE) for V3+/V2+, which makes the Ti4+/Ti3+ redox couple less prone to parasitic hydrogen evolution reactions. Aiming to optimize electrolyte formulation for Ti-based RFBs, we measured the transport and kinetic parameters for the Ti3+/Ti4+ redox couple in various acidic supporting electrolytes [2, 3, 4] such as H2SO4, HCl, HNO3 and CH3SO3H (methanesulfonic acid). The solubility and electrochemical reversibility of the Ti3+/Ti4+ redox couple was examined with a view toward increasing the energy density and energy efficiency of Ti-based RFBs. The solvation sphere around the redox active species was manipulated by varying the counterion and by careful control of the redox active species to counterion ratio. The solvation and complexation behavior were correlated to the transport and kinetic properties through the impact of the solvent reorganization energy () on the electrochemical Thiele Modulus[5]. The kinetics of the Ti3+/Ti4+ redox couple diverged by >2x between the forward and reverse reactions and the diffusion coefficients were found to vary by an order of magnitude with varying complexation and solvation. Finally, we also demonstrate the predictive ability of the electrochemical Thiele Modulus by correlating the predictions based on the effectiveness factor to polarization performance of Ti symmetric cells. References: "Titanium Statistics and Information," S. Geological Survey, (2021). Dong, Yongrong, et al. "Titanium-manganese electrolyte for redox flow battery." SEI Tech. Rev.84 (2017): 35-40. Sankarasubramanian, Shrihari, and Vijay K. Ramani. "Redox flow battery." U.S. Patent No. 11,177,497. 16 Nov. 2021. Savinell, R. F., et al. "Discharge Characteristics of a Soluble Iron‐Titanium Battery System." Journal of the Electrochemical Society3 (1979): 357. Sankarasubramanian, S., Kahky, J., Ramani, V., PNAS, 116 (30), 14899 (2019) Figure 1

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35

Gubes, Murat, and Galip Oturanc. "Approximate solutions of coupled Ramani equation by using RDTM with compared DTM and exact solutions." New Trends in Mathematical Science 4, no. 4 (November 12, 2016): 198. http://dx.doi.org/10.20852/ntmsci.2016.107.

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36

Zhang, Lijun, and Chaudry Masood Khalique. "Quasi-periodic wave solutions and two-wave solutions of the KdV–Sawada–Kotera–Ramani equation." Nonlinear Dynamics 87, no. 3 (November 7, 2016): 1985–93. http://dx.doi.org/10.1007/s11071-016-3168-4.

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37

Albalawi, Sarah M., Adel A. Elmandouh, and Mohammed Sobhy. "Integrability and Dynamic Behavior of a Piezoelectro-Magnetic Circular Rod." Mathematics 12, no. 2 (January 11, 2024): 236. http://dx.doi.org/10.3390/math12020236.

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The present work strives to explore some qualitative analysis for the governing equation describing the dynamic response of a piezoelectro-magnetic circular rod. As a result of the integrability study of the governed equation, which furnishes valuable insights into its structure, solutions, and applications in various fields, we apply the well-known Ablowitz–Ramani–Segur (ARS) algorithm to prove the non-integrability of the governed equation in a Painlevé sense. The qualitative theory for planar integrable systems is applied to study the bifurcation of the solutions based on the values of rod material properties. Some new solutions for the governing equation are presented and they are categorized into solitary and double periodic functions. We display a 3D representation of the solutions in addition to investigating the influence of wave velocity on the obtained solution for the particular material of the rod.

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38

Elmandouh, Adel, Aqilah Aljuaidan, and Mamdouh Elbrolosy. "The Integrability and Modification to an Auxiliary Function Method for Solving the Strain Wave Equation of a Flexible Rod with a Finite Deformation." Mathematics 12, no. 3 (January 24, 2024): 383. http://dx.doi.org/10.3390/math12030383.

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Our study focuses on the governing equation of a finitely deformed flexible rod with strain waves. By utilizing the well-known Ablowita–Ramani–Segur (ARS) algorithm, we prove that the equation is non-integrable in the Painlevé sense. Based on the bifurcation theory for planar dynamical systems, we modify an auxiliary equation method to obtain a new systematic and effective method that can be used for a wide class of non-linear evolution equations. This method is summed up in an algorithm that explains and clarifies the ease of its applicability. The proposed method is successfully applied to construct wave solutions. The developed solutions are grouped as periodic, solitary, super periodic, kink, and unbounded solutions. A graphic representation of these solutions is presented using a 3D representation and a 2D representation, as well as a 2D contour plot.

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39

King, Lucia Imaz. "Moving towards the epicentre: The void and the image in the film-making of R.V. Ramani." Moving Image Review & Art Journal (MIRAJ) 7, no. 2 (September 1, 2018): 268–83. http://dx.doi.org/10.1386/miraj.7.2.268_1.

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40

Elsayed, M. E. Zayed, and H. Arnous A. "The modified (G/G)-expansion method for the (1+1) Hirota-Ramani and (2+1) breaking soliton equation." International Journal of Physical Sciences 8, no. 3 (January 23, 2013): 124–30. http://dx.doi.org/10.5897/ijps12.720.

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Wei, Peng-Fei, Chun-Xiao Long, Chen Zhu, Yi-Ting Zhou, Hui-Zhen Yu, and Bo Ren. "Soliton molecules, multi-breathers and hybrid solutions in (2+1)-dimensional Korteweg-de Vries-Sawada-Kotera-Ramani equation." Chaos, Solitons & Fractals 158 (May 2022): 112062. http://dx.doi.org/10.1016/j.chaos.2022.112062.

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Ahmed, Sheikh Imran Uddin, and Shrihari Sankarasubramanian. "Electrochemical and Spectroscopic Investigation of Solvation and Complexation Effects on Titanium Redox Flow Battery Electrolytes." ECS Meeting Abstracts MA2023-01, no. 3 (August 28, 2023): 745. http://dx.doi.org/10.1149/ma2023-013745mtgabs.

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Titanium (Ti) is a promising elemental redox active species for redox flow batteries (RFBs) as an alternative to the commercially advanced vanadium RFB (V-RFB) due to its 100x availability in the Earth crust1, and 10x lower cost1 (both compared to elemental vanadium). The half-cell potential of the Ti4+/Ti3+ (0.1 V vs SHE) redox couple is closer to the H+/H2 (0V vs SHE) redox couple compared to V3+/V2+ (-0.26V vs SHE)2 thereby mitigating parasitic hydrogen evolution reactions. Thus, the development of Ti-based RFBs (by coupling it with another economical and abundant elemental active) is a promising pathway towards cost effective, grid-scale energy storage and the present work aims to optimize the Ti electrolyte to enable this integration. Ti electrolytes (typically as the anolyte) have been coupled withFe3, 4, Mn5 and Ce6 based catholytes to yield a number of relatively (compared to other aqueous systems) high-potential and high energy density RFBs7. The Ti-Fe, Ti-Mn, and Ti-Ce RFBs have theoretical energy densities of 9 Wh.L-1, 18.9 Wh.L-1, and 19.4 Wh.L-1 respectively7. Electrolyte design with an eye towards improving actives solubility (thereby increasing energy density) and decreasing side-reactions has proven crucial to realizing these systems. For example, deleterious Cl2 evolution reduced the coulombic efficiency of the earliest Ti-Fe RFBs3 and has been overcome by the use of H2SO4 as an alternate supporting electrolyte4. In Ti-Mn RFBs, Mn3+ is highly unstable and inclined to form MnO2. A highly acidic environment or increasing the amount of Mn2+ reduces the disproportionation of Mn3+. Alternatively, the addition of an equal concentration of TiOSO4 with MnSO4 at the catholyte and reducing the maximum operational state of charge to 50%5 reduces MnO2 precipitation. In Ti-Ce RFBs, Ce is the limiting element in terms of solubility as the solubility of Ce is lower (0.5M in H2SO4 and 0.9M in CH3SO3H)6, 8, 9 whereas Ti is highly soluble (up to 5M TiOSO4 in 4M H2SO4). On the other hand, kinetically, Ti is the limiting element with 3x lower rate constant than the Ce redox couple6. Seeking to harness the higher solubility (and hence energy density) of the Ti electrolyte while overcoming the kinetic limitations, we investigated the solubility and the electrochemical reversibility of Ti4+/Ti3+. We characterized the behavior of Ti ions in various supporting electrolytes namely, H2SO4, HCl, HNO3, CH3SO3H by varying the ratio of Ti redox active species to counterion. The diffusion coefficients of the Ti3+ and Ti4+ ions were measured and the impact of the Tix+ to solvating ligand ratio was examined (see example in Fig.1(a)). Spectroscopically determining the coordination structures around solvated Tix+ ions10, we identified electrolyte compositions that result in increasing ionic conductivity (Fig.1(b)). The effect (or lack thereof) of solvation structure on the Ti3+/Ti4+ redox rate constants were examined and correlated to the calculated solvation energy (hence distinguishing between inner- and outer-sphere processes) and the role of catalysts was addressed. Finally, utilizing the electrochemical Thiele modulus framework11, 12, the best (highest energy density coupled with optimal transport and kinetic properties) Ti electrolyte compositions for Ti-Fe, Ti-Mn and Ti-Ce RFBs has been identified. References: Titanium Statistics and Information. U.S. Geological Survey 2021. Speight, J. G., Lange's handbook of chemistry. McGraw-Hill Education: 2017. Savinell, R. F.; Liu, C. C.; Galasco, R. T.; Chiang, S. H.; Coetzee, J. F., Journal of The Electrochemical Society 1979, 126 (3), 357-360. Qiao, L.; Fang, M.; Liu, S.; Zhang, H.; Ma, X., Chemical Engineering Journal 2022, 434, 134588. Kaku, H.; Dong, Y. R.; Hanafusa, K.; Moriuchi, K.; Shigematsu, T., ECS Transactions 2016, 72 (10), 1-9. Sankarasubramanian, S.; Zhang, Y.; He, C.; Gregory, T.; Ramani, V., Research Square 2021. Ahmed, S. I. U.; Shahid, M.; Sankarasubramanian, S., Frontiers in Energy Research 2022, DOI:10.3389/fenrg.2022.1021201. Xie, Z.; Xiong, F.; Zhou, D., Energy & Fuels 2011, 25 (5), 2399-2404. Kreh, R. P.; Spotnitz, R. M.; Lundquist, J. T., The Journal of Organic Chemistry 1989, 54 (7), 1526-1531. Miyanaga, T.; Watanabe, I.; Ikeda, S., Bulletin of the Chemical Society of Japan 1990, 63 (11), 3282-3287. Sankarasubramanian, S.; Kahky, J.; Ramani, V., PNAS 2019, 116 (30), 14899-14904. Sharma, K.; Sankarasubramanian, S.; Parrondo, J.; Ramani, V., PNAS, 2021, 118 (34), e2105889118. Figure 1

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Zhu, Chen, Chun-Xiao Long, Yi-Ting Zhou, Peng-Fei Wei, Bo Ren, and Wan-Li Wang. "Dynamics of multi-solitons, multi-lumps and hybrid solutions in (2+1)-dimensional Korteweg–de Vries–Sawada–Kotera–Ramani equation." Results in Physics 34 (March 2022): 105248. http://dx.doi.org/10.1016/j.rinp.2022.105248.

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Osman, M. S. "Analytical study of rational and double-soliton rational solutions governed by the KdV–Sawada–Kotera–Ramani equation with variable coefficients." Nonlinear Dynamics 89, no. 3 (June 3, 2017): 2283–89. http://dx.doi.org/10.1007/s11071-017-3586-y.

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Chen, Yixuan, Amin Bahrami, Nitish Kumar, Francesco P. Orfino, Monica Dutta, Esmaeil Navaei Alvar, Michael Lauritzen, Erin Setzler, Alexander Agapov, and Erik Kjeang. "Impact of GDL Hole on Chemo-Mechanical Membrane Degradation Investigated by 4D in-Situ Visualization." ECS Meeting Abstracts MA2023-02, no. 37 (December 22, 2023): 1780. http://dx.doi.org/10.1149/ma2023-02371780mtgabs.

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Membrane electrode assembly (MEA) is the core unit of a fuel cell system, which is composed of proton exchange membrane (PEM), sandwiched on both sides by catalyst layers (CLs) and gas diffusion layers (GDLs). The membrane is subjected to various chemical and mechanical stresses during fuel cell operation, and these stresses will cause membrane degradation over time. Also, the interaction between membrane and other fuel cell components such as CLs and GDLs contributes uncertainty to the membrane degradation process. Previous morphological studies [1] on CLs and GDLs discovered common non-uniform features in these materials such as clusters, sags, cracks, and holes. In addition, such features could also appear during the MEAs assembly [1] process. Previous membrane degradation study discovered buckling driven membrane failure [2], which is strongly related to CL or GDL sags, cracks, and holes. Additionally, impinging driven membrane failure was also reported [2], which is caused by clusters and peaks on CL or GDL surfaces. Models were also developed to understand the mechanism of mechanical membrane degradation related to buckling. For instance, Ramani et al. [2] created a model to simulate membrane buckling into GDL surface pores, and identified stress concentration at the buckling center as the root cause of crack formation. Comparing MEAs made with high and low surface roughness GDLs, it was confirmed that GDL with low surface roughness has significant mitigatory impact on mechanical membrane durability. However, to the authors’ best knowledge, the level of impact of such non-uniform features under combined chemo-mechanical degradation, which is the most common form of membrane degradation during regular fuel cell operation, has not yet been reported. In this work, the objective is to understand the specific impacts of GDL holes as they relate or contribute to the combined chemo-mechanical membrane degradation mechanism and associated membrane durability in polymer electrolyte fuel cells. The study was carried out using a four dimensional (three spatial dimensions plus one temporal dimension) in-situ methodology achieved through X-ray computed tomography (XCT) visualization [3], and the MEAs were made of GORE-SELECT® membrane, Pt based CLs, and AvCarb® GDLs with smooth and crack free microporous layer (MPL). Through-thickness circular GDL holes were introduced with multiple controlled sizes at multiple strategic locations, on anode or cathode GDL. The MEAs were custom designed small scale MEAs with 0.39 cm2 active area for in-situ XCT visualization, and the cells were subjected to a custom accelerated stress test (AST) protocol imparting combined chemo-mechanical stresses in an alternating pattern [3]. The graphite endplates had narrower flow field compared to previously used ones [3], which can reduce membrane degradation rate and better deliver compressive stress to the MEA. A baseline MEA without GDL hole was first tested, with only minor membrane thinning observed. For the GDL hole MEAs, it was discovered that smaller holes were more impactful on membrane durability than larger holes. Among the three selected hole sizes (2.0, 0.5, and 0.2 mm2), through-plane membrane cracks were only observed under the smallest holes, both at the hole center and edge, which are the two stress concentration locations. On the CL surface, cracks were observed at the GDL hole center as a crack network, and along the hole edge, as indicated in the figure. Although the GDL holes are expected to mainly alter mechanical membrane degradation, it was discovered that MEAs with through-plane membrane cracks also had higher membrane thinning rate compared to the baseline. However, the non-uniformity MEAs without through-plane membrane cracks had similar membrane thinning rate as the baseline test. Therefore, the through-plane membrane cracks likely elevated chemical stressors as well; hypothetically, through increased gas crossover. The AST results suggest that GDL holes can be harmful to membrane chemo-mechanical degradation and the level of severity depends on their size and location. Keywords: fuel cell; membrane durability; gas diffusion layer defect; mechanical degradation; chemical degradation; X-ray computed tomography Acknowledgements: This research was supported by the Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Western Economic Diversification Canada, Ballard Power Systems, and W.L. Gore & Associates. This research was undertaken, in part, thanks to funding from the Canada Research Chairs program. References: [1] S. Prass, S. Hasanpour, P.K. Sow, A.B. Phillion, W. Mérida, Journal of Power Sources. 319 (2016) 82–89. [2] D. Ramani, N.S. Khattra, Y. Singh, F.P. Orfino, M. Dutta, E. Kjeang, Journal of Power Sources. 512 (2021) 230431. [3] Y. Chen, Y. Singh, D. Ramani, F.P. Orfino, M. Dutta, E. Kjeang, Journal of Power Sources. 520 (2022) 230674. Figure 1

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Karama, Mohameḍ. "Kimonro cha Mvuli asahau uume wake nrowa ni jamaa kinavowasilishwa katika Utendi wa Ramani ya Maisha ya Ndoa (Mume): Uchanganuzi Kifano." East African Journal of Swahili Studies 6, no. 1 (April 19, 2023): 101–18. http://dx.doi.org/10.37284/jammk.6.1.1181.

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Katika ṭaaluma ya fasihi ya kiSwahili uṭeṇḍi maarufu uliyoṭafiṭiwa mno kuhusu masiyala ya nrowa, kazi na majukumu ya mke k̇a mumewe, ni ule wa Ṁanakupona. K̇a mara ya k̇anza, makala haya yanaangaziya uṭeṇḍi ṁengine ambao haujaṭafiṭiwa k̇a ṭafsili wenye kuraṭibu kazi na majukumu ya mume k̇a mkewe. Utendi wa Ramani ya Maisha ya Ndoa (Mume) uliyotungwa na Usṭadh Mahmouḍ Mau unampa mvulana wasiya wa kutumiya katika kufaulisha nrowa yake. Makala haya yaṇjaribu kudhihirisha elimu ya kiḍini na hekima ya ṭajiriba ya kimaisha aliyonayo mtunzi k̇a kumnasihi mvuli kuwa hakuna ukʰuu katika nrowa. Makala haya yakiongozwa na nadhariya ya Usemezano yamechanganuwa maudhui ya hekima ya mtunzi na kubainisha kuwa: k̇enye mukṭadha wa nrowa mke na mume wanasemezana si wao peke yao bali na jamii k̇a ujumla; kuna mabaḍiliko ya maana ya maneno kila kukicha basi na maana ya uume piya inabaḍilika kila kukicha; na ṁishowe, maana inayokuja baaḍa ya kukaa nrani ya maisha ya nrowa huwa ṭafauṭi na ile ilozoweleka. Makala haya yanahiṭimisha kuwa mtunzi aliṭaka kumfunza mvulana na msichana kuwa maisha ya nrowa ni ya watʰu wawili lakini majukumu zaiḍi yanaṁangukiya mume katika kufaulisha nrowa yake. Isiṭoshe, uṭeṇḍi huu unamkazaniya mume amsome mkewe kila siku kila saa ili aweze k̇idhibiṭi nrowa. Naṭija ilopatikana k̇a kuushughulikiya uṭeṇḍi huu ni kubaḍilisha nadhari katika ṭaaluma za kiSwahili na kijinsiya k̇a k̇angaziwa sana Ṁanakupona na kuṭoṭafiṭiwa ṭʰeṇḍi nyenginezo haswa zinazotiliya maanani mtoto wa kiyume.

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Chen, Guiying. "NEW APPROACH OF (G/G)-EXPANSION METHOD AND NEW APPROACH OF GENERALIZED (G/G)-EXPANSION METHOD FOR THE COUPLED RAMANI EQUATION." Journal of Mathematical Sciences: Advances and Applications 56, no. 1 (April 5, 2019): 39–52. http://dx.doi.org/10.18642/jmsaa_7100122038.

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DAVID, K. J., and S. RAMANI. "New species, redescriptions and phylogenetic revision of tribe Dacini (Diptera: Tephritidae: Dacinae) from India based on morphological characters." Zootaxa 4551, no. 2 (January 30, 2019): 101. http://dx.doi.org/10.11646/zootaxa.4551.2.1.

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The tribe Dacini comprising four genera, namely Bactrocera Macquart, Dacus Fabricius, Monacrostichus Bezzi and Zeugodacus Hendel, is a derived lineage in Tephritidae. It is one of the most economically important tribes in Tephritidae harbouring several species of quarantine concern across the world. We describe two new species of Bactrocera Macquart, B. (Parazeugodacus) conica David & Ramani, sp. n. & B. (B.) prabhui David, sp. n. from India. Postabdominal structures of males and/or females of 23 species of Bactrocera, 16 species of Zeugodacus and 8 species of Dacus from India are illustrated and described for the first time, which revealed similarities between Dacus and Zeugodacus with respect to epandrial shape and praeputium patterning. Bactrocera is unique in possessing oval shaped epandrium and an unpatterned praeputium. An analysis of phylogenetic relationships between three genera of the tribe Dacini from India based on morphological characters has been attempted for the first time. Cladistic analysis employing 51 characters of 62 species in Dacini, with seven species as outgroups revealed the monophyly of Dacini, Bactrocera and Dacus with supporting nonhomplasious synapomorphies. Ichneumonopsis Hardy, often included in the Gastrozonini, does not possess any synapomorphies of Dacini, eventhough it appeared at the base of the Dacini clade. Zeugodacus was retrieved as a monophyletic sister-group to Dacus based solely on a single homoplasious host plant character, with weak statistcal support.

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Zeng, Rong, Ling Liu, Jiasi Yan, and Lijun Jiang. "Highly Dispersed Pt on Ceria with N-Doped Carbon As High Durable Catalyst for ORR and High Tolerant to H₂s and CO for HOR in PEMFCs." ECS Meeting Abstracts MA2023-02, no. 40 (December 22, 2023): 2015. http://dx.doi.org/10.1149/ma2023-02402015mtgabs.

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Proton Exchange Membrane Fuel Cells (PEMFCs) are one of the most promising clean and efficient energy conversion devices. However, carbon supported Pt-based electrocatalysts, widely used in PEMFCs, show poor stability due to the carbon oxidation and unstable Pt in practical application. Hydrogen starvation at anode and unprotected startup/shutdown of PEMFCs can arouse high potential over 1.3V resulting in severe carbon corrosion and irreversible performance loss. With increased electron conductivity, the doped metal oxides Ti3O5Mo0.2Si0.4 (TOMS) [1], Nb-TiO2 [ 2], Ta0.3Ti0.7O2 [ 3], Sb-SnO2 [ 4], W-SnOx and TiOx [ 5] show great potential as durable catalyst supports that can stand over 1.0V for PEMFCs. Furthermore, strong metal support interactions (SMSI) of Pt and the support also enhance the stability of Pt. CeO2 which exhibits good dynamic oxygen storage and release capacity, strong redox capacity, was deposited on N-doped carbon (NC) as support. Pt was highly dispersed on the CeO2/NC to form Pt/CeO2/NC catalyst. Accelerated degradation test (ADT) was carried out by sweeping voltage from 1.0V to 1.2V on a GC disk with a Pt loading of 20 μgPt·cm-2 in the oxygen saturated 0.1M HClO4 electrolyte with a scan rate of 10mV·s-1, while the Pt ring was held at 1.2V vs. RHE. Fig 1 shows the morphology of as-prepared CeO2/NC and Pt/CeO2/NC, the LSV and CV of Pt/CeO2/NC after different cycles of ADT. The specific mass activity at 0.9ViR free (im@0.9V) for oxygen reduction reaction (ORR) of Pt/CeO2/NC was 105mA×mg-1 and slightly increased about 8% after 10000 cycles. On the other hand, precious metal on CeO2 is high efficient CO oxidation catalyst [6-7] and widely applied for H2 purification from reformate gases. CeO2 was applied as H2S oxidant [8] too. This broadens the Pt/CeO2/NC as a high H2S and CO tolerant catalyst for hydrogen oxidation reaction (HOR). The high dispersion of Pt nano particle, the interaction between the poison gases and Pt and/or CeO2 was believed to contribute. The theoretical and experimental details will be presented at the symposium. Reference A. M. Esfahani, E. B. Easton. Applied Catalysis B: Environmental, 2020, 268, 118743. H. Cheng, Sankarasubramanian, I. Matanovic, P. Atanassov, V. Ramani. ChemSusChem, 2019, 12, 3468. Kumar, V. Ramani. ACS Catal. 2014, 4, 1516. Ozouf, G. Cognard,F. Maillard, M. Chatenet, L. Gu´etaz,M. Heitzmann, P. A. Jacques, C. Beauger. J. Electrochem. Soc., 2019, 165(6), F3036. T. Arai, O. Takashi, K. Amemiya, T. Takahashi. SAE Int. J. Alt. Power. 2017, 6 (1), 145. Y. Kardash1, E. A. Derevyannikova, E. M. Slavinskaya, A. I. Stadnichenko, V. A. Maltsev, A. V. Zaikovskii, S. A. Novopashin, A. I. Boronin1, K. M. Neyman. Frontiers in Chemistry, 2019, 7, 114. Maurer, J. Jelic, J. Wang, A. Gänzler, P. Dolcet, C. Wöll, Y. Wang, F. Studt, M. Casapu, J. Grunwaldt. Nature Catalysis, 2020, 3, 824. X. Zheng, Y. Li, L. Zhang, L. Shen, Y. Xiao, Y. Zhang,C. Au, L. Jiang. Applied Catalysis B: Environmental, 2019, 252, 98. Figure 1

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D. Wahnschafft, Ralph. "Book Review: Energy Systems and the Environment: Approaches to Impact Assessment in Asian Developing Countries Edited by Peter Hills and K.V. Ramani." Asean Economic Bulletin 9, no. 1 (July 1992): 119–21. http://dx.doi.org/10.1355/ae9-1m.

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