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Some fixed point theorems for modified JS-G-contractions and an application to integral equations
V. Srinivas Chary,G. Sudhaamsh Mohan Reddy,Huseyin Isik,Hassen Aydi,D. Srinivasa Chary,Stojan Radenovic 한국전산응용수학회 2020 Journal of applied mathematics & informatics Vol.38 No.5
In this article, we establish some fixed point results in G-metric spaces using the modified JS-G-contractions and we provide some suitable examples to support the results. Also, we give an application to solve an integral equation.
Study on high-pressure behaviour of spherical carbon black nanoparticles with core–shell structure
Reddy Surakanti Srinivas,Shukla Balmukund,Chakraborty Soumee,Srihari V.,Bhalerao G. M.,Shekar N. V. Chandra 한국탄소학회 2022 Carbon Letters Vol.32 No.5
We report the behaviour of carbon black (CB) nanoparticles (spherical carbon shells), subjected to external pressure, using diamond anvil cell at synchrotron facility. CB nanoparticles have been synthesized by lamp black method using olive oil as combustion precursor and ferrocene as an organometallic additive. The catalyst-assisted CB has an iron oxide (γ-Fe2O3) core and amorphous carbon shell (i.e. core–shell structure). Our present study suggests that the carbon shells are partially transparent to the applied high pressure, and result in the reduction of effective pressure that gets transferred to the iron oxide core. High-pressure Raman spectroscopy results indicate that the surrounding carbon shells get compressed with pressure and this change is reversible. However, no structural transformation was observed till the highest applied pressure (25 GPa). The Raman spectroscopy results also suggests that the carbon shells are less pressure sensitive as their pressure coefficients (dω/dP) of G-peak were calculated (3.79 cm−1/GPa) to be less than that for other carbon allotropes.
Blockchain-based e-Agro Intelligent System
Srinivas, V. Sesha,Pompapathi, M.,Rao, G. Srinivasa,Chaitanya, Smt. M. International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.7
Farmers E-Market is a website that allows agricultural workers to direct market their products to buyers without the use of a middleman. That theory is blockchain system will be used by authors to accomplish this. The system, which is built on a public blockchain system, supports sustainability, shippers, and consumers. Farmers can keep track of their farming activities. Customers can review the product's history and track its journey through carriers to delivery after making a purchase. Farmers are encouraged to get information about their interests promptly in a blockchain-enabled system like this. This functionality is being used by small-scale farmers to form groups based on their location to attract large-scale customers, renegotiate farming techniques or volumes, and enter into contracts with buyers. The analysis shows the use of blockchain technology with a farmer's portal that keeps the video of trading data of crops, taking into account the qualities of blockchain such as values and create or transaction data. The proposal merges python as a programming language with a blockchain system to benefit farmers, vendors, and individuals by preserving transactions.
G. Srinivas,Sung-Chul Shin 한국자기학회 1997 Journal of Magnetics Vol.2 No.4
The magnetic and magneto-optical properties of Ni/Pt multilayers exhibiting square Kerr hysterisis loops at room temperature were studied. Squared polar Kerr hysterisis loops at room temperature in Ni/Pt multilayer thin films were obtained for the samples prepared by sequential dc magnetron sputter deposition of nickel and platinum with t_(Ni) = 13 - 21 Å and t_(pt) = 3.5 - 7.5 Å. The coercivity of these multilayers was in the range of 400 - 1100 Oe. The saturation magnetization was found to show an inverse dependence on nickel sublayer thickness. About a monolayer of Ni at interface was observed to behave less magnetically than the interior Ni atoms. The polar Kerr rotation exhibited an increasing trend with decreasing wavelength in the spectral range of 7000-4000 Å. The maximum of polar Kerr rotation was found to shift to higher wavelengths with increase in nickel sublayer thickness.
(Pt / Co / Pt / Ni) Multilayers for Novel Magneto - Optical Recording Media
G. Srinivas,Sung-Chul Shin 한국자기학회 1996 Journal of Magnetics Vol.1 No.2
The dc magnetron sputter deposited (Pt/Co/Pt/Ni) multilayers which exhibited Curie temperatures in the range of 150-300 ℃ were studied as possible alternative multilayers for magneto-optical recording to the widely studied Co/Pt, whose Curie temperatures are in the range of 200~400℃. The Coercivities of these multilayers were between 450 Oe and 800 Oe. These multilayers exhibited comparable magnetic and magneto-optical properties to Co/Pt multilayers with enhancement of the Kerr rotation at lower wavelengths and negligible Kerr ellipticity over a wide range of the spectrum (4000~7000 Å).
A novel method to synthesize a single topology for dynamically loaded members
Lakshmi Srinivas G,Arshad Javed 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.4
A topology optimization problem is framed using boundary conditions that involve load magnitude and direction. The generated optimal topology is dependent on the direction of load rather than magnitude. Thus, for a dynamic situation, multiple optimal topologies are obtained. This study proposes a method to generate a single superior topology using superimposition and post-refinement by Gaussian image-processing technique. The dynamic loading condition is discretized using (a) uniform and (b) performance-based non-uniform criteria. Three image-processing parameters are applied to retain the desired volume fraction and simplify the topology from a manufacturing aspect. A one-degree-of-freedom manipulator link is considered as an example. Solid isotropic material with penalization method is selected to update the design variables. The programmable logic controller with human-machine interfacebased experimental setup is used to validate the simulation results. The synthesized topology (50 % mass reduction) from the non-uniform increment method performs best among all uniform approaches and individual topologies.
Design and development of enhanced criticality alarm system for nuclear applications
Padi Srinivas Reddy,R. Amudhu Ramesh Kumar,M. Geo Mathews,G. Amarendra 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.5
Criticality alarm systems (CASs) are mandatory in nuclear plants for prompt alarm in the event of anycriticality incident. False criticality alarms are not desirable as they create a panic environment for radiationworkers. The present article describes the design enhancement of the CAS at each stage andprovides maximum availability, preventing false criticality alarms. The failure mode and effect analysisare carried out on each element of a CAS. Based on the analysis, additional hardware circuits aredeveloped for early fault detection. Two different methods are developed, one method for channel loopfunctionality test and another method for dose alarm test using electronic transient pulse. The designenhancement made for the external systems that are integrated with a CAS includes the power supply,criticality evacuation hooter circuit, radiation data acquisition system along with selection of differentsoft alarm set points, and centralized electronic test facility. The CAS incorporating all improvements areassembled, installed, tested, and validated along with rigorous surveillance procedures in a nuclear plantfor a period of 18,000 h.
Reddy Surakanti Srinivas,Shukla Balmukund,Srihari V.,Bhalerao G. M.,Shekar N. V. Chandra 한국탄소학회 2022 Carbon Letters Vol.32 No.4
Individual multi-walled carbon nanotubes (MWCNTs) were exposed to the electron beam of 200 kV energy and high resolution transmission electron micrographs were recorded at several time intervals. Interestingly, the nucleation of diamond nanoparticles with in the highly disordered MWCNT matrix upon electron-irradiation is observed. This happens without any assistance of high pressures and temperatures. High pressure X-ray diffraction experiments were performed on core/shell structures which suggest that even the closed structures of carbon resist any inward pressure, thereby ruling out the possibility of a hypothetical internal pressure under the electron irradiation conditions. Our experiments suggest that the transformation of graphitic carbon into diamond in the size window of a few nanometers is possible due to the stability of the diamond and a selective dissolution effect of 200 kV electrons on graphite. A mechanism for the same is proposed.