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Effect of Geometrical Parameters on Optimal Design of Synchronous Reluctance Motor
V. S. Nagarajan,V. Kamaraji,M. Balaji,R. Arumugam,N. Ganesh,R. Rahul,M. Lohit 한국자기학회 2016 Journal of Magnetics Vol.21 No.4
Torque ripple minimization without decrease in average torque is a vital attribute in the design of Synchronous Reluctance (SynRel) motor. As the design of SynRel motor is an arduous task, which encompasses many design variables, this work first analyses the significance of the effect of varying the geometrical parameters on average torque and torque ripple and then proposes an extensive optimization procedure to obtain configurations with improved average torque and minimized torque ripple. A hardware prototype is fabricated and tested. The Finite Element Analysis (FEA) software tool used for validating the test results is MagNet 7.6.0.8. Multi Objective Particle Swarm Optimization (MOPSO) is used to determine the various designs meeting the requirements of reduced torque ripple and improved torque performance. The results indicate the efficacy of the proposed methodology and substantiate the utilization of MOPSO as a significant tool for solving design problems related to SynRel motor.
B V Murlimanju,Ganesh Kumar Chettiar,M D Prameela,Mamatha Tonse,Naveen Kumar,Vasudha V Saralaya,Latha V Prabhu 대한해부학회 2014 Anatomy & Cell Biology Vol.47 No.3
The identification of mastoidal emissary veins is of importance in the neurosurgical practice to diagnose abnormal and normal structures. In the present study, the objectives were to estimate the prevalence rate of mastoidal emissary foramina in the temporal bones of the adult skull and to study their number and morphology. The present study included 48 adult human skulls which were obtained from the gross anatomy laboratory of our institution. The mastoid parts of 96 temporal bones were macroscopically observed for the prevalence, number and morphology of the emissary foramina. It is observed that, the mastoidal emissary foramen was present in 88 temporal bones (91.7%) of our specimens. The foramen was observed single in 60 temporal bones (62.5%), double in 22 bones (22.9%), and triple in 6 temporal bones (6.2%). The mastoidal emissary foramen was absent in 8 (8.3%) temporal bones. The foramen was bilaterally absent in 3 (3.1%) skulls. It was unilaterally absent in 2 (2.1%) skulls and both were on the left side. The mastoidal emissary vein is prevalent in a large number (91.7%) of cases. It was observed that the accessory mastoidal emissary foramina were present in 29.1% of cases. Recognition of the mastoid emissary veins and accessory mastoid emissary veins during the otologic surgery is critical to avoid the significant bleeding. In the neurosurgical practice, the knowledge is important due to variability in the number of mastoidal emissary veins and their connection to the venous sinuses.
Morphology and topography of the parietal emissary foramina in South Indians: an anatomical study
B. V. Murlimanju,Vasudha V. Saralaya,M. S. Somesh,Latha V. Prabhu,Ashwin Krishnamurthy,Ganesh Kumar Chettiar,Mangala M. Pai 대한해부학회 2015 Anatomy & Cell Biology Vol.48 No.4
The objectives of the present study were to study the prevalence of the parietal emissary vein in adult South Indian population and to study the distance of foramen from the sagittal suture. There were 58 adult human skulls in the present study which were available at the anatomy department of our institution. The study included 116 parietal bones which have been observed macroscopically for the number, prevalence and topography of the emissary foramen. The emissary foramen was present in 83 parietal bones (71.5%) of the present study. It was present at the junction between the middle 1/3 and posterior 1/3 region of the parietal bone. The foramen was observed solitary in 73 parietal bones (62.9%), double in 8 bones (6.9%), and triple in 2 parietal bones (1.7%). The foramen was not observed in 33 parietal bones (28.4%). The bilateral absence of parietal emissary foramen was seen in 7 skulls (12.1%). It was absent unilaterally in 19 skulls (32.7%). The accessory foramina were seen in only 8 skulls (13.8%). The mean distance of the foramen from the sagittal suture was 6.7±2.9 mm and 6.8±2.8 mm on the right and left sides respectively. The prevalence of parietal emissary vein in the present study was 71.5%. The present study has observed important data about the morphology and morphometry of the parietal emissary vein in South Indian population. The identification of parietal emissary veins and accessory veins is important in the operation room to prevent the blood loss.
Promising ZnO-based DSSC performance using HMP molecular dyes of high extinction coefficients
Ganesh, T.,Nguyen, Hong-Minh,Mane, Rajaram S.,Kim, Nakjoong,Shinde, Dipak V.,Bhande, Sambhaji S.,Naushad, Mu.,Hui, K. N.,Han, Sung Hwan The Royal Society of Chemistry 2014 Dalton Transactions Vol.43 No.29
<P>Employing newly synthesized di-substituted tri-phenyl amine (HMP-9) and carbazole (HMP-11) dyes (with limited acidic carboxyl anchor groups), a power conversion efficiency as high as 7.03% in ZnO nanocrystallite (NC)-based dye-sensitized solar cells (DSSCs) is achieved. The specific molecular designs of HMP-09 and HMP-11 consisting of with and without hexyloxy spacer groups, and added tri-phenyl amine or 9-phenyl-9<I>H</I>-carbazole donor groups, respectively, attached on the ancillary ligands are advantageous, evidenced from electrochemical impedance spectroscopy measurements, for ZnO NC-based DSSCs.</P> <P>Graphic Abstract</P><P>Employing newly synthesized di-substituted tri-phenyl amine (HMP-9) and carbazole (HMP-11) dyes, a power conversion efficiency as high as 7.03% in ZnO nanocrystallite-based dye-sensitized solar cells under AM 1.5 G illumination is achieved. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4dt01179a'> </P>
Study of the immunosuppressive activity of methanolic extract of Madhuca longifolia (Koenig)
V., Chitra,Ganesh, Dhawle,Shrinivas, Sharma Kyung Hee Oriental Medicine Research Center 2010 Oriental pharmacy and experimental medicine Vol.10 No.3
The immunosuppressive activity of the Methanol extract of bark of Madhuca longifolia (Koenig) consisting of a mixture of saponins, flavonoids, tannins, steroids, phenol and glycosides was studied on the immune responses in mice. Methanol extract of Madhuca longifolia (MLL) was administered orally at doses of 50, 100 and 150 mg/kg/day to healthy mice divided into four groups consisting of six animals each. The assessment of immunomodulatory activity was carried out by testing the humoral (antibody titre) and cellular (foot pad swelling) immune responses to the antigenic challenge by sheep RBCs. Furthermore, the effect on hematological parameters as well as relative organ weight was determined. On oral administration MML showed a significant decrease delayed type hypersensitivity (DTH) response whereas the humoral response to sheep RBCs was unaffected. Thus MLL significantly suppressed the cellular immunity by decreasing the footpad thickness response to sheep RBCs in sensitized mice. With a dose of 100 and 150 mg/kg/day the DTH response was $7.66{\pm}2.75$ and $6.41{\pm}1.21$ respectively in comparison to corresponding value of $14.50{\pm}2.38$ for untreated control group. These differences in DTH response were statistically significant (P < 0.05). The study demonstrates that MLL shows preferential suppression of the components of cell-mediated immunity and shows no effect on the humoral immunity.
Study of the immunosuppressive activity of methanolic extract of Madhuca longifolia (Koenig)
Chitra V,Dhawle Ganesh,Sharma Shrinivas 경희대학교 융합한의과학연구소 2010 Oriental Pharmacy and Experimental Medicine Vol.10 No.3
The immunosuppressive activity of the Methanol extract of bark of Madhuca longifolia (Koenig)consisting of a mixture of saponins, flavonoids, tannins, steroids, phenol and glycosides was studied on the immune responses in mice. Methanol extract of Madhuca longifolia (MLL) was administered orally at doses of 50, 100 and 150 mg/kg/day to healthy mice divided into four groups consisting of six animals each. The assessment of immunomodulatory activity was carried out by testing the humoral (antibody titre) and cellular (foot pad swelling) immune responses to the antigenic challenge by sheep RBCs. Furthermore, the effect on hematological parameters as well as relative organ weight was determined. On oral administration MML showed a significant decrease delayed type hypersensitivity (DTH) response whereas the humoral response to sheep RBCs was unaffected. Thus MLL significantly suppressed the cellular immunity by decreasing the footpad thickness response to sheep RBCs in sensitized mice. With a dose of 100 and 150 mg/kg/day the DTH response was 7.66 ± 2.75 and 6.41 ± 1.21 respectively in comparison to corresponding value of 14.50 ± 2.38 for untreated control group. These differences in DTH response were statistically significant (P < 0.05). The study demonstrates that MLL shows preferential suppression of the components of cell-mediated immunity and shows no effect on the humoral immunity.
Mixed Matrix PVA-GO-TiO2 Membranes for the Dehydration of Isopropyl Alcohol by Pervaporation
Smita Gupta,Ganesh B. Thorat,Z.V.P. Murthy 한국고분자학회 2020 Macromolecular Research Vol.28 No.6
In the current work, mixed matrix membranes of polyvinyl alcohol (PVA)- graphene oxide (GO)-titanium dioxide (TiO2) were prepared using a solvent evaporation technique for the separation of isopropyl alcohol from its azeotropic mixture with water by pervaporation. In this work, the effects of the feed water concentration in the range of 10%-40% and the feed temperature of 50-80 oC have been investigated. The characterization of membranes was done by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and the contact angle measurements. The Arrhenius activation energy for permeation was determined to be in the range of 8-12.8 kJ/mol. The results of the diffusion coefficient values and the Arrhenius activation energy parameters showed that the waterselectivity was improved at higher concentrations of GO-TiO2.
On homogeneous shear flows with bottom cross section
S. Lavanya,V. Ganesh,G. Venkata Ramana Reddy 한국전산응용수학회 2023 Journal of applied mathematics & informatics Vol.41 No.5
We consider inviscid, incompressible homogeneous shear flows of variable cross section known as extended Rayleigh problem. For this extended Rayleigh problem, we derived instability region which intersect with semi-circle instability region under some condition. Also we derived condition for stability , upper bound for amplification factor and growth rate of an unstable mode.