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Search Results: 1 - 10 of 325162 matches for " S. Sundaram "
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A Feasibility study on Monitoring of Fracture Healing by Electric Stimulation-A study on 2 tibial fracture cases
S. Kumaravel,S. Sundaram
International Journal of Engineering Science and Technology , 2010,
Abstract: Sufferings associated with broken limbs have been on an exponential increase in India, mainly due to road accidents. Conventional healing and uniting methods takes any where between 1 to 6 months depending on the nature of the fracture and the speed of reporting for medical care .In an effort to speed up the healing process low voltage electric stimulation has been tried and has been found to cut down the healing time by nearly 30% depending on the fracture-history. Also the course of fracture healing has been traced and definite trends during the process identified.Two case studies of fractures of the leg bone through electric stimulation indicate identical trends in the healingprocess.
Two-phase experimental heat transfer studies on a water-diesel system in a shell and tube heat exchanger
Alagesan, V.;Sundaram, S.;
Brazilian Journal of Chemical Engineering , 2012, DOI: 10.1590/S0104-66322012000200008
Abstract: two-phase heat transfer involving two immiscible systems is gaining importance in petrochemical and allied industries. varying compositions of diesel and water were experimentally studied in a 1:2 shell and tube heat exchanger. the data on pure water and diesel were fitted to an equation of the form. h1φ = a nmre.the two-phase multiplier, φ l, was related to the lockhart martinelli (l-m) parameter, χtt2, using the two-phase data and a correlation φ l = b+c(χtt2)+d/(χtt2)2 was established. the two-phase heat transfer coefficient was calculated based on the coefficients 'a' and 'm' for pure diesel and pure water along with фl and the l-m parameter. the calculated values of the two-phase heat transfer coefficient h2φ based on pure diesel and pure water suggest that diesel is a better reference fluid since the average error is much smaller compared to pure water as reference.
Role of myocardial perfusion single photon emission computed tomography in pediatric cardiology practice
Sundaram P,Padma S
Annals of Pediatric Cardiology , 2009,
Abstract: Diagnostic and prognostic power of myocardial perfusion imaging in patients with coronary artery disease has been demonstrated with planar imaging which was further improvised with addition of gated SPECT and newer Technetium labeled myocardial perfusion tracers like SestaMIBI, Tetrofosmin. Myocardial perfusion abnormalities at rest and after stress are considered to be the best predictors of cardiac event-free survival in adults with ischemic heart disease. This article highlights various myocardial perfusion imaging (MPI)radiopharmaceuticals, exercise procedures, pharmacological stress protocols, indications for MPI and myocardial perfusion patterns in children with some of the common congenital and acquired heart diseases.
Semiclassical dynamics of atomic Bose-Einstein condensates
S. Choi,B. Sundaram
Physics , 2009,
Abstract: An atomic Bose-Einstein condensate (BEC) is often described as a macroscopic object which can be approximated by a coherent state. This, on the surface, would appear to indicate that its behavior should be close to being classical. In this paper, we clarify the extent of how "classical" a BEC is by exploring the semiclassical equations for BECs under the mean field Gaussian approximation. Such equations describe the dynamics of a condensate in the classical limit in terms of the variables < x > and < p > as well as their respective variances. We compare the semiclassical solution with the full quantum solution based on the Gross-Pitaevskii Equation (GPE) and find that the interatomic interactions which generate nonlinearity make the system less "classical." On the other hand, many qualitative features are captured by the semiclassical equations, and the equations to be solved are far less computationally intensive than solving the GPE which make them ideal for providing quick diagnostics, and for obtaining new intuitive insight.
A nonlinear Ramsey interferometer operating beyond the Heisenberg limit
S. Choi,B. Sundaram
Physics , 2007, DOI: 10.1103/PhysRevA.77.053613
Abstract: We show that a dynamically evolving two-mode Bose-Einstein condensate (TBEC) with an adiabatic, time-varying Raman coupling maps exactly onto a nonlinear Ramsey interferometer that includes a nonlinear medium. Assuming a realistic quantum state for the TBEC, namely the SU(2) coherent spin state, we find that the measurement uncertainty of the ``path-difference'' phase shift scales as the standard quantum limit (1/N^{1/2}) where N is the number of atoms, while that for the interatomic scattering strength scales as 1/N^{7/5}, overcoming the Heisenberg limit of 1/N.
Determination of Optimal Double Sampling Plan using Genetic Algorithm
Sampath Sundaram,S P Deepa
Pakistan Journal of Statistics and Operation Research , 2012, DOI: 10.1234/pjsor.v8i2.255
Abstract:
Erythematous plaque over the face
Vijayalakshmi S,Arunharke Megha,Sundaram
Indian Journal of Dermatology, Venereology and Leprology , 2006,
Abstract:
Surface effects on nanowire transport: numerical investigation using the Boltzmann equation
Venkat S. Sundaram,Ari Mizel
Physics , 2003, DOI: 10.1088/0953-8984/16/26/005
Abstract: A direct numerical solution of the steady-state Boltzmann equation in a cylindrical geometry is reported. Finite-size effects are investigated in large semiconducting nanowires using the relaxation-time approximation. A nanowire is modelled as a combination of an interior with local transport parameters identical to those in the bulk, and a finite surface region across whose width the carrier density decays radially to zero. The roughness of the surface is incorporated by using lower relaxation-times there than in the interior. An argument supported by our numerical results challenges a commonly used zero-width parametrization of the surface layer. In the non-degenerate limit, appropriate for moderately doped semiconductors, a finite surface width model does produce a positive longitudinal magneto-conductance, in agreement with existing theory. However, the effect is seen to be quite small (a few per cent) for realistic values of the wire parameters even at the highest practical magnetic fields. Physical insights emerging from the results are discussed.
Heat transfer studies in a spiral plate heat exchanger for water: palm oil two phase system
Ramachandran, S.;Kalaichelvi, P.;Sundaram, S.;
Brazilian Journal of Chemical Engineering , 2008, DOI: 10.1590/S0104-66322008000300006
Abstract: experimental studies were conducted in a spiral plate heat exchanger with hot water as the service fluid and the two-phase system of water ? palm oil in different mass fractions and flow rates as the cold process fluid. the two phase heat transfer coefficients were correlated with reynolds numbers (re) in the form h = a rem, adopting an approach available in literature for two phase fluid flow. the heat transfer coefficients were also related to the mass fraction of palm oil for identical reynolds numbers. the two-phase multiplier (ratio of the heat transfer coefficient of the two phase fluid and that of the single phase fluid) was correlated with the lockhart martinelli parameter in a polynomial form. this enables prediction of the two-phase coefficients using single-phase data. the predicted coefficients showed a spread of ± 10 % in the laminar range.
Peanuts and Their Nutritional Aspects—A Review  [PDF]
V. S. Settaluri, C. V. K. Kandala, N. Puppala, J. Sundaram
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.312215
Abstract: Peanut is a legume crop that belongs to the family of Fabaceae, genus Arachis, and botanically named as Arachis hypogaea. Peanuts are consumed in many forms such as boiled peanuts, peanut oil, peanut butter, roasted peanuts, and added peanut meal in snack food, energy bars and candies. Peanuts are considered as a vital source of nutrients. Nutrition plays an important role in growth and energy gain of living organisms. Peanuts are rich in calories and contain many nutrients, minerals, antioxidants, and vitamins that are essential for optimum health. All these biomolecules are essential for pumping vital nutrients into the human body for sustaining normal health. This paper presents an overview of the peanut composition in terms of the constituent biomolecules, and their biological functions. This paper also discusses about the relationship between consumption of peanuts and their effect on human metabolism and physiology. It highlights the usefulness of considering peanuts as an essential component in human diet considering its nutritional values.
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