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Search Results: 1 - 10 of 401362 matches for " M. Ramu "
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Fuzzy Logic Based Wind Connected UPFC to Mitigate Voltage Sag and Reactive Power Compensation in a Transmission System
Krishna Chaitanya Diggavi,M. Ramu
International Journal of Electrical and Power Engineering , 2012, DOI: 10.3923/ijepe.2012.94.99
Abstract: Power flow is one of the major problems in a transmission system. When a fault occurs in a transmission system there is said to be a drop in the voltage. Voltage sag is one of the most severe problems to be dealt with as it causes severe process disruptions and results in substantial economic loss. Decrease/increase of reactive power is also one of the main problem. FACTS devices are used to control the power flow to increase the transmission capacity and to optimize the stability of the power system. One of the most widely used FACTS devices is Unified Power Flow Controller (UPFC). Here, the sending end voltage is generated by the wind generation system. In this study, researchers are comparing two different controller s performance. The two controllers are PI and Fuzzy. On comparing, researchers can say that Fuzzy Logic Controller (FLC) based UPFC shown better voltage sag compensation than PI controller based UPFC. Matlab/Simulink is used to create the PI and FLC and to simulate UPFC Model.
KINEMATICS FROM SPECTRAL LINES FOR AGN OUTFLOWS BASED ON TIME-INDEPENDENT RADIATION-DRIVEN WIND THEORY
J. M. Ramu00EDrez
Revista mexicana de astronomía y astrofísica , 2011,
Abstract: Construimos un modelo de fotoionización dependiente de la velocidad para el absorbedor tibio de NGC 3783. Adoptando formas funcionales de la velocidad del flujo y su densidad del número de partículas con el radio, apropiadas para un viento acelerado por radiación, calculamos el nivel de ionización, la temperatura, el corrimiento Doppler y las profundidades ópticas de las líneas como función de la distancia. El modelo reproduce la relación observada entre la ionización del gas y el corrimiento del centroide de las líneas de absorción en NGC 3783. Este espectro requiere de la presencia de dos flujos: uno altamente ionizado responsable de las alas azules de las líneas de alto grado de ionización y al mismo tiempo las alas rojas de las líneas de menor grado de ionización; y uno de baja ionización que produce las alas azules de las líneas de oxígeno.
Anthropoidal Pouch Technique - Salvation For Resorbed Ridges.
Taruna M,Bharath Vishal M,Chittranjan B,Ramu Reddy M
Indian Journal of Dental Advancements , 2010,
Abstract: This article presents a case report on neutral zone technique used for treating a complete edentulous patient with resorbed ridges. It emphasizes on using materials available by the chairside to make impressions for resorbed ridges and to locate the neutral zone. It also presents certain modifications in technique for recording the neutral zone to achieving maximum prosthesis stability, comfort and function.
(E)-N′-(3-Bromo-5-chloro-2-hydroxybenzylidene)nicotinohydrazide
M. Prabhu,K. Parthipan,A. Ramu,G. Chakkaravarthi
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811038268
Abstract: There are two independent molecules in the asymmetric unit of the title compound, C13H9BrClN3O2, in which the dihedral angles between the benzene and pyridine rings are 8.23 (9)° and 52.84 (12)°. Both the molecules exist in an E configuration with respect to the C=N double bond. The two molecules in the asymmetric unit are linked via weak C—H...O hydrogen bonds. In both the molecules, an intramolecular O—H...N hydrogen bond generate an S(6) graph-set motif. In the crystal, intermolecular N—H...O and C—H...O hydrogen bonds generate bifurcated R12(7) ring motifs. The crystal packing is further stabilized by weak intermolecular N—H...O, N—H...N, C—H...O and π–π [centroid–centroid distance 3.615 (2) ] interactions.
QUANTITATIVE ASSAY OF ALMOTRIPTAN MALATE IN PURE DRUG AND PHARMACEUTICAL PREPARATIONS USING SIMPLE AND CONVENIENT VISIBLE SPECTROPHOTOMETRIC METHODS
U. VIPLOVA PRASAD,M. SYAM BAB,B. KALYANA RAMU
International Journal of Pharma Sciences and Research , 2012,
Abstract: Two direct, simple and sensitive visible spectrophotometric methods (M1&M2) are described for the assay of almotripan malate in pure and solid dosage forms. The method M1 involves oxidative coupling of drug with brucine in presence of sodium meta periodate and purple red colored species is formed and exhibits absorption maxima at 520nm. The method M2 is based on the formation of yellowish brown colored species by the drug with Folin reagent and exhibits absorption maxima at 450nm. Regression analysis of Beer-Lambert plots showed good correlation in the concentration ranges (8.0-24) μg/ml for method M1, (16-48) μg/ml for method M2 respectively. The proposed methods are applied to commercial available tablets and the results are statistically compared with those obtained by the reported UV reference method and validated by recovery studies. The results are found satisfactory and reproducible. These methods are applied successfully for the estimation of the almotriptan malate in the presence of other ingredients that are usually present in dosageforms. These methods offer the advantages of rapidity, simplicity and sensitivity and normal cost and can be easily applied to resource-poor settings without the need for expensive instrumentation and reagents.
A Laminar Flow Model for Mucous Gel Transport in a Cough Machine Simulating Trachea: Effect of Surfactant as a Sol Phase Layer  [PDF]
Dipak Kumar Satpathi, Addepalli Ramu
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.34040
Abstract:

In this paper, a planar three layer quasisteady laminar flow model is proposed in a cough machine which simulates mucous gel transport in model trachea due to mild forced expiration. The flow is governed by the time dependent pressure gradient generated in trachea due to mild forced expiration. Mucous gel is represented by a viscoelastic Voigt element whereas sol phase fluid and air are considered as Newtonian fluids. For fixed airflow rate, it is shown that when the viscosity of mucous gel is small, mucous gel transport decreases as the elastic modulus increases. However, elastic modulus has negligible effect on large gel viscosity. It is also shown that for fixed airflow rate and fixed airway dimension, mucous gel transport increases with the thickness of sol phase fluid and this increase is further enhanced as the viscosity of sol phase fluid decreases. The effect of surfactant is studied by considering sol phase as surfactant layer which causes slip at the wall and interface of sol phase and mucous gel. It is found that in the presence of surfactant mucous gel transport is enhanced.

 

THEORY OF JOINT LIABILITIES, ADVERSE SELECTION, ASSORTATIVE MATCHING AND SELF-FINANCING
Ramu Maurya
International Journal of Economics and Research , 2011,
Abstract: Microfinance is seen to be a remedy of poverty eradication and globally it is perceived that microfinance can remove the problem of poverty. Basically microfinance works on joint liability model. Traditional theories of credit lending say that rural credit markets are imperfectly competitive and acquiring information about borrowers type that is who is risky and who is safe is not costless. This market imperfection leads to high interest rate and drives out safe borrower from the credit market. In economic literature this problem is considered as adverse selection problem. Joint liability model try to solve the problem of adverse selection through group lending.This paper explores the idea of joint liability model and tries to solve the problem of adverse selection through the positive assortative matching. Paper concludes that in positive assortative matching, the payoffs of borrowers would be more than the payoffs of negative assortative matching. Paper, also try to show that self financing can bring down the interest rate and size of penalty and improve the borrower’s expected payoffs
A Partition Function Approximation Using Elementary Symmetric Functions
Ramu Anandakrishnan
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051352
Abstract: In statistical mechanics, the canonical partition function can be used to compute equilibrium properties of a physical system. Calculating however, is in general computationally intractable, since the computation scales exponentially with the number of particles in the system. A commonly used method for approximating equilibrium properties, is the Monte Carlo (MC) method. For some problems the MC method converges slowly, requiring a very large number of MC steps. For such problems the computational cost of the Monte Carlo method can be prohibitive. Presented here is a deterministic algorithm – the direct interaction algorithm (DIA) – for approximating the canonical partition function in operations. The DIA approximates the partition function as a combinatorial sum of products known as elementary symmetric functions (ESFs), which can be computed in operations. The DIA was used to compute equilibrium properties for the isotropic 2D Ising model, and the accuracy of the DIA was compared to that of the basic Metropolis Monte Carlo method. Our results show that the DIA may be a practical alternative for some problems where the Monte Carlo method converge slowly, and computational speed is a critical constraint, such as for very large systems or web-based applications.
A bootstrap test for equality of mean absolute errors
Naveen Kumar Boiroju,Ramu Yerukala,M.Venugopala Rao,M. Krishna Reddy
Journal of Engineering and Applied Sciences , 2011,
Abstract: In this paper, a bootstrap test procedure for testing of equality of mean absolute errors of two alternative time series models is developed. Applicability of the bootstrap test is explained using two numerical examples and the results compared with the Sign test and Die bold-Mariano Test.
Bootstrap graphical test for equality of variances
Naveen Kumar Boiroju,Ramu Yerukala,M Venugopala Rao,M Krishna Reddy
Electronic Journal of Applied Statistical Analysis , 2011,
Abstract: Testing hypothesis about variance parameters arises in contexts where uniformity is important and also in relation to checking assumptions as a preliminary to analysis of variance, discriminant analysis and so forth. In this paper, a bootstrap graphical method is developed as an alternative to the Bartlett and Levene tests to test the hypothesis on equality of several variances. An example is given to demonstrate the advantage of bootstrap graphical procedure over the Bartlett and Levene tests from decision making point of view.
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