Semantic Discovery of Cloud Service Catalog Published Over Resource Description Framework

Magesh Vasudevan,Haleema P. K.,N. Ch. S. N. Iyengar 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.6

Cloud computing is a model to provide pool of services on demand which is shared among the consumers and metered. Cloud deployment should support efficient mechanism to publish its services in a right method such that the end users identify them. Services has to be discovered according to user’s requirement dynamically. The proposed work discusses about introducing semantics in the cloud services description, such that it projects itself apart from other providers and capably handle the commercial demand for their services. The semantics are introduced at the service catalog level and the CSP publish their list of services in the form of RDF, whose semantics are defined in a provider specific ontology. The system was evaluated with keyword & frequency matching discovery and proved to be efficient with semantic discovery over RDF data.

Terahertz radiation from plasma filament generated by two-color laser gas-plasma interaction

Magesh Kumar, K. K.,Kumar, M.,Yuan, T.,Sheng, Z. M.,Chen, M. Cambridge University Press 2015 Laser and particle beams Vol.33 No.3

<B>Abstract</B><P>We develop a theoretical model for terahertz (THz) radiation generation, when an intense short laser pulse (ω1, <I>k</I>1) is mixed with its frequency shifted second harmonic (ω2, <I>k</I>2), where ω2 = 2ω1 + ωT and ωT is in the THz range in the plasma. The lasers exert a ponderomotive force on the electrons and drive density perturbations at (2ω1, 2<I>k</I>1) and (ω2 − ω1, <I>k</I>2 − <I>k</I>1). These density perturbations couple with the oscillatory velocities of the electron due to the lasers and produce a nonlinear current at (ω2 − 2ω1, <I>k</I>2 − 2<I>k</I>1). This current acts as an antenna to produce the THz radiation. The THz power depends upon the square of plasma density and $I_1^2 {I_2}$, where <I>I</I>1 and <I>I</I>2 are the intensities of fundamental and second harmonic laser. The radiation is mainly along the forward direction. Two-dimensional particle-in-cell simulations are used to study the near-field radiation properties.</P>

A versatile photoanode-driven photoelectrochemical system for conversion of CO2 to fuels with high faradaic efficiencies at low bias potentials

Magesh, G.,Kim, E.,Kang, H.,Banu, M.,Kim, J.,Kim, J.,Lee, J. Royal Society of Chemistry 2014 Journal of Materials Chemistry A Vol.2 No.7

A photoanode-driven photoelectrochemical system consisting of a WO3 photoanode under bias potential and Cu or Sn/SnOx as the cathode for the reduction of CO2 has been studied under visible light irradiation. The bias potentials typically required for the onset of Oxygen evolution current at the photoanode were sufficient for the efficient reduction of CO2 at the metallic/composite counter electrodes. Using Cu as a cathode electrocatalyst, faradaic efficiencies of 67% for CH4 and 71.6% for all carbon-containing products were achieved. With Sn/SnOx, a combined faradaic efficiency (CO + HCOOH) of 44.3% was obtained at + 0.8 V. The 2-electrode potential between the counter electrode and working electrode for the WO3 driven system was less than the lowest bias potential reported so far for conventional photocathode-driven systems. The results demonstrate for the first time that the intrinsically more stable photoanode-driven systems could accomplish the reduction of CO2 with higher efficiencies relative to the conventional photocathode-driven systems.

Assessment of Flicker Emission in a Grid Connected Wind Farms

Magesh T.,Devi G.,Lakshmanan T. 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4

Wind farms in Tamil Nadu's Coimbatore district have identified several issues, including flickering emissions, frequent generator tripping, and power evacuation issues caused by a weak grid. Taking into consideration the scarcity of research on flickering emissions, this work focuses on the causes of short-term flicker severity (Pst) in wind farms that export generated power to industrial loads. To identify the scenarios that cause flickering, simulation models of fixed speed wind farm and variable speed wind farm with controllers were developed using DIgSILENT power factory software. The flicker emissions were measured at the wind farm substations using Fluke and Dranetz PX5.8 power quality analyzers in accordance with the IEC 61400-21 standard. To validate the simulation model, the results from the flickermeter during the simulation and the field measurements were compared. According to the results of this research, both fixed and variable speeds produce flicker emissions that exceed the IEC standard limit, that causes the power electronics-based industrial drives to fail to operate. The controllers were developed to improve the performance of wind farms that will benefit the current and future wind energy-efficient conversion systems.

Certain Subclasses of Bi-Starlike and Bi-Convex Functions of Complex Order

MAGESH, NANJUNDAN,BALAJI, VITTALRAO KUPPARAOo Department of Mathematics 2015 Kyungpook mathematical journal Vol.55 No.3

In this paper, we introduce and investigate an interesting subclass $M_{\Sigma}({\gamma},{\lambda},{\delta},{\varphi})$ of analytic and bi-univalent functions of complex order in the open unit disk ${\mathbb{U}}$. For functions belonging to the class $M_{\Sigma}({\gamma},{\lambda},{\delta},{\varphi})$ we investigate the coefficient estimates on the first two Taylor-Maclaurin coefficients ${\mid}{\alpha}_2{\mid}$ and ${\mid}{\alpha}_3{\mid}$. The results presented in this paper would generalize and improve some recent works of [1],[5],[9].

Ocimum sanctum induces apoptosis in A549 lung cancer cells and suppresses the in vivo growth of lewis lung carcinoma cells

Magesh, Venkataraman,Lee, Jang-Choon,Ahn, Kwang Seok,Lee, Hyo-Jung,Lee, Hyo-Jeong,Lee, Eun-Ok,Shim, Bum Sang,Jung, Hee Jae,Kim, Jin Sung,Kim, Dae Keun,Choi, Seung-Hoon,Ahn, Kyoo-Seok,Kim, Sung-Hoon John Wiley Sons, Ltd. 2009 Phytotherapy research Vol.23 No.10

<P>Although Ocimum sanctum has been used extensively for its medicinal values in India and China, its antitumor activity against human nonsmall cell lung carcinoma (NSCLC) A549 cells has not been investigated until now. Therefore, the antitumor mechanism of ethanol extracts of Ocimum sanctum (EEOS) was elucidated in A549 cells in vitro and the Lewis lung carcinoma (LLC) animal model. EEOS exerted cytotoxicity against A549 cells, increased the sub-G1 population and exhibited apoptotic bodies in A549 cells. Furthermore, EEOS cleaved poly(ADP-ribose)polymerase (PARP), released cytochrome C into cytosol and simultaneously activated caspase-9 and -3 proteins. Also, EEOS increased the ratio of proapoptotic protein Bax/antiapoptotic protein Bcl-2 and inhibited the phosphorylation of Akt and extracellular signal regulated kinase (ERK) in A549 cancer cells. In addition, it was found that EEOS can suppress the growth of LLC inoculated onto C57BL/6 mice in a dose-dependent manner. Overall, these results demonstrate that EEOS induces apoptosis in A549 cells via a mitochondria caspase dependent pathway and inhibits the in vivo growth of LLC, suggesting that EEOS can be applied to lung carcinoma as a chemopreventive candidate. Copyright © 2009 John Wiley & Sons, Ltd.</P>

SOME INCLUSION RELATIONS OF CERTAIN SUBCLASSES OF HARMONIC UNIVALENT FUNCTIONS ASSOCIATED WITH GENERALIZED DISTRIBUTION SERIES

Magesh, Nanjundan,Porwal, Saurabh,Themangani, Rajavadivelu Korean Mathematical Society 2020 대한수학회논문집 Vol.35 No.3

The purpose of this present paper is to obtain inclusion relations between various subclasses of harmonic univalent functions by using the convolution operator associated with generalized distribution series. To be more precise, we obtain such inclusions with harmonic starlike and harmonic convex mappings in the plane.

Certain subclasses of starlike and convex functions of order α with negative coefficients

N. Magesh,V. PRAMEELA 장전수학회 2013 Proceedings of the Jangjeon mathematical society Vol.16 No.3

In this paper, we define a subclass of starlike functions and obtaincoefficient estimates. Further, we investigate radii of starlikeness and convexityfor a family of integral operator and neighborhood properties.

Finite element analysis of different Debonding methods in Orthodontics

( V. Magesh ),( P. Harikrishnan ) 한국감성과학회 2021 추계학술대회 Vol.2021 No.0

Orthodontic bracket is a component of fixed appliance which is bonded on the tooth surface to apply force and moments. Debonding of the orthodontic bracket is done at the end of treatment. In general, Orthodontists use few techniques to debond a bracket from tooth enamel surface namely peel, shear, compression and torsion. In this study, Finite Element Analysis (FEA) of an orthodontic bracket with a tooth was analyzed with different debonding techniques. Solid model of an orthodontic bracket was created along with the tooth and adhesive layer. Three existing debonding methods such as tension, torsion and shear on an anterior tooth were compared with new method of debonding called compression method. The principal stresses on the tooth enamel were evaluated after debonding. The maximum principal stresses were 8.15 MPa, 27.87 MPa, 35.18 MPa and 17.77 MPa in compression, tension, torsion and shear debonding methods respectively. The results showed that compression method was better for debonding than tensile, torsion and shear methods as it produced least detrimental forces to the enamel during debonding. Thus, we suggest clinicians that the compression method may be suitable for debonding with least enamel damage and patient discomfort.

Finite element analysis of different Debonding methods in Orthodontics

( V. Magesh ),( P. Harikrishnan ) 한국감성과학회 2021 한국감성과학회 국제학술대회(ICES) Vol.2021 No.-

Orthodontic bracket is a component of fixed appliance which is bonded on the tooth surface to apply force and moments. Debonding of the orthodontic bracket is done at the end of treatment. In general, Orthodontists use few techniques to debond a bracket from tooth enamel surface namely peel, shear, compression and torsion. In this study, Finite Element Analysis (FEA) of an orthodontic bracket with a tooth was analyzed with different debonding techniques. Solid model of an orthodontic bracket was created along with the tooth and adhesive layer. Three existing debonding methods such as tension, torsion and shear on an anterior tooth were compared with new method of debonding called compression method. The principal stresses on the tooth enamel were evaluated after debonding. The maximum principal stresses were 8.15 MPa, 27.87 MPa, 35.18 MPa and 17.77 MPa in compression, tension, torsion and shear debonding methods respectively. The results showed that compression method was better for debonding than tensile, torsion and shear methods as it produced least detrimental forces to the enamel during debonding. Thus, we suggest clinicians that the compression method may be suitable for debonding with least enamel damage and patient discomfort.