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Search Results: 1 - 10 of 190 matches for " Dharshnamoorthy Govindarajan "
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Compressive Strength and Electron Paramagnetic Resonance Studies on Waste Glass Admixtured Cement  [PDF]
Ramasamy Gopalakrishnan, Dharshnamoorthy Govindarajan
New Journal of Glass and Ceramics (NJGC) , 2011, DOI: 10.4236/njgc.2011.13017
Abstract: The present work reports the effect of waste glass (WG) on the properties of Portland cement through Electron Para- magnetic Resonance (EPR) study. Cement pastes containing 0, 10, and 30% replacement of waste glass with cement and in a water to cement ratio of 0.4 have been prepared. The g factors of Fe(III) and Mn(II) impurities at different hydration ages have been calculated. The decreased gFe values and simultaneous increase in gMn values with increase in replacement % of WG are explained due to retardation of cement hydration.
An Organizational Improvement Model for Preventing Burnout of Healthcare Employees  [PDF]
Rajaram Govindarajan
Journal of Human Resource and Sustainability Studies (JHRSS) , 2018, DOI: 10.4236/jhrss.2018.64044
Abstract: Stress and burnout are common among healthcare workers, with negative implications for their personal and organizational objectives. They have higher rates of suicides, traffic accidents, psychosomatic illness, consumption of tobacco, alcohol, and other drugs. Healthcare organizations also face the consequences of decreased motivation, increased absenteeism and high turnover of their employees. To carry out their task of providing a safe, effective, fast and efficient service to their customers, employees need to be motivated. In this article, five preventive mechanisms to increase employee motivation are proposed: 1) eliminating systemic conflict and friction among employees by improving the definitions of roles, responsibilities, and authorities; 2) improving resource distribution criteria among different patient-centered organizational processes so that the expected results are correctly correlated to resource availability; 3) ensuring that the organization detects potential deficiencies in the knowledge/competence of its personnel in a pro-active manner and providing them with the necessary training to perform their assigned tasks; 4) defining and using internal communication channels to communicate the objectives of the organization and the results obtained, facilitating employee participation and recognizing their contributions; 5) creating a feedback loop between employees and the management to measure, analyze, and continuously improve their motivational levels.
Synthesis, Thermal Behaviour, XRD, and Luminescent Properties of Lighter Lanthanidethiodipropionate Hydrates Containing Aminogunidine as Neutral Ligand  [PDF]
S. Packiaraj, S. Govindarajan
Open Journal of Inorganic Chemistry (OJIC) , 2014, DOI: 10.4236/ojic.2014.43006
Aminoguanidine lanthanide thiodipropionate hydrates of composition [Ln(Agun)2(tdp)3·nH2O], Agun = Aminoguanidine, tdp = thiodipropionic acid, where Ln = La, Pr, Nd and Sm if n = 2, have been prepared and characterized by physic-chemical techniques.
Ensemble Classifier for Direct Marketing
Govindarajan Muthukumarasamy
International Journal of Knowledge and Research in Management and E-Commerce , 2011,
Abstract: Data mining is a process of automatically searching large volumes of data for patterns. Classification maps data into predefined groups or classes. It is often referred to as supervised learning because the classes are determined before examining the data. Direct marketing has become an important application field for data mining. In direct marketing, companies or organizations try to establish and maintain a direct relationship with their customers in order to target them individually for specific product offers or for fund raising. A variety of techniques have been employed for analysis ranging from traditional statistical methods to data mining approaches. This paper focuses on classification method involving radial basis function and an ensemble of radial basis function. Finally, we propose hybrid architecture involving ensemble and base classifiers for Direct Marketing. The analysis results show that the performance of the proposed method is superior to single usage of existing classification method. We show that the proposed method provides significant improvement of prediction accuracy in direct marketing.
Robot-Assisted Surgery: A Review
Anand Govindarajan
University of Toronto Medical Journal , 2001, DOI: 10.5015/utmj.v78i2.1017
Network Intrusion Detection using Support Vector Regression
Govindarajan Muthukumarasamy
International Journal of Artificial Intelligence & Knowledge Discovery , 2011,
Abstract: Data Mining is the use of algorithms to extract the information and patterns derived by the knowledge discovery in databases process. Classification maps data into predefined groups or classes. It is often referred to as supervised learning because the classes are determined before examining the data. This paper addresses using ensemble approach of Support Vector Regression for intrusion detection. Due to increasing incidents of cyber attacks, building effective intrusion detection systems (IDS) are essential for protecting information systems security, and yet it remains an elusive goal and a great challenge. The feasibility and the benefits of the proposed approach are demonstrated by means of data mining problem: Network Intrusion Detection. Intrusion detection systems help network administrators prepare for and deal with network security attacks. These systems collect information from a variety of systems and network sources, and analyze them for signs of intrusion and misuse. We show that proposed ensemble of Support Vector Regression is superior to individual approach for intrusion detection in terms of classification rate.
On the Geometry of W_n gravity
Suresh Govindarajan
Physics , 1994,
Abstract: We report work done with T. Jayaraman (hep-th/9405146) in this talk. In a recent paper, Hitchin introduced generalisations of the Teichmuller space of Riemann surfaces. We relate these spaces to the Teichmuller spaces of W-gravity. We show how this provides a covariant description of W-gravity and naturally leads to a Polyakov path integral prescription for W-strings. (Talk presented at the International Colloquium on Modern Quantum Field Theory II at the Tata Institute, Bombay during Jan. 5-11, 1994, to appear in the proceedings)
Higher dimensional uniformisation and W-geometry
Suresh Govindarajan
Physics , 1994, DOI: 10.1016/0550-3213(95)00527-7
Abstract: We formulate the uniformisation problem underlying the geometry of W_n-gravity using the differential equation approach to W-algebras. We construct W_n-space (analogous to superspace in supersymmetry) as an (n-1) dimensional complex manifold using isomonodromic deformations of linear differential equations. The W_n-manifold is obtained by the quotient of a Fuchsian subgroup of PSL(n,R) which acts properly discontinuously on a simply connected domain in CP^{n-1}. The requirement that a deformation be isomonodromic furnishes relations which enable one to convert non-linear W-diffeomorphisms to (linear) diffeomorphisms on the W_n-manifold. We discuss how the Teichmuller spaces introduced by Hitchin can then be interpreted as the space of complex structures or the space of projective structures with real holonomy on the W_n-manifold. The projective structures are characterised by Halphen invariants which are appropriate generalisations of the Schwarzian. This construction will work for all ``generic'' W-algebras.
Covariantising the Beltrami equation in W-gravity
Suresh Govindarajan
Physics , 1995, DOI: 10.1007/BF00312669
Abstract: Recently, certain higher dimensional complex manifolds were obtained in [hep-th/9412078] by associating a higher dimensional uniformisation to the generalised Teichm\"uller spaces of Hitchin. The extra dimensions are provided by the ``times'' of the generalised KdV hierarchy. In this paper, we complete the proof that these manifolds provide the analog of superspace for W-gravity and that W-symmetry linearises on these spaces. This is done by explicitly constructing the relationship between the Beltrami differentials which naturally occur in the higher dimensional manifolds and the Beltrami differentials which occur in W-gravity. This also resolves an old puzzle regarding the relationship between KdV flows and W-diffeomorphisms.
On Physical States in c<1 String Theory
S. Govindarajan
Physics , 1992,
Abstract: The BRST cohomology analysis of Lian and Zuckerman leads to physical states at all ghost number for $c<1$ matter coupled to Liouville gravity. We show how these states are related to states at ghost numbers zero(pure vertex operator states -- DK states) and ghost number one(ring elements) by means of descent equations. These descent equations follow from the double cohomology of the String BRST and Felder BRST operators. We briefly discuss how the ring elements allow one to determine all correlation functions on the sphere.
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