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Search Results: 1 - 10 of 152014 matches for " H. Chandra "
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Occasionally weakly compatible mapping in cone metric space
A. Bhatt,H. Chandra
Applied Mathematical Sciences , 2012,
Teleportation of Superposition of Coherent States Using 4-Partite States and Effect of Decoherence on Fidelity  [PDF]
H. Prakash, N. Chandra, Shivani A. Kumar, Ranjana Prakash
Journal of Quantum Information Science (JQIS) , 2012, DOI: 10.4236/jqis.2012.24019

A scheme of teleporting a superposition of coherent states |α> and |-α> using a 4-partite state, a beam splitter and two phase shifters was proposed by N. Ba An (Phys. Rev. A, 68, 022321, 2003). The author concluded that the probability for successful teleportation is only 1/4 in the limit |α| and 1/2 in the limit |α|. In this paper it is shown that the author’s scheme can be altered slightly so as to obtain an almost perfect teleportation for an appreciable value of |α|2. We find the minimum assured fidelity i.e., the minimum fidelity for an arbitrarily chosen information state, which we write MAF in this paper, for different cases. We also discuss the effect of decoherence on teleportation fidelity. We find that if no photons are counted in both final outputs, MAF, is still nonzero except when there is no decoherence and the initial state (the state to be teleported) is even coherent state. For non-zero photon counts, MAF decreases with increase in |α|2 for low noise. For high noise, however, it increases, attains a maximum value and then decreases with |α|2. The average fidelity depends appreciably on the initial state for low values of |α|2 only.

An unusual case of chronic lymphocytic leukemia following primary breast carcinoma on chemotherapy
Chandra H,Chandra S,Verma S,Pathak V
Journal of Postgraduate Medicine , 2011,
Metal Salts Assisted Enzyme-Based Extraction of Stevioside from the Leaves of Stevia rebaudiana Bertoni  [PDF]
A. Bhaskar Rao, Sara A. George, Sateesh Alavala, H. M. Meshram, K. Chandra Shekar
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.612075
Abstract: Stevioside, extracted from the leaves of Stevia rebaudiana Bertoni, is a natural, high intensity, lowcaloric sweetener with wide therapeutic activities. Conventional stevioside extraction methodologies involve the use of non-green solvents, supercritical fluids, microwaves, etc., however, all these processes are expensive, time-consuming and eco-unfriendly. Therefore an alternative process is desired for the isolation of stevioside. In this study, a novel enzyme-mediated extraction (EME) method has been developed. The dry stevia leaves were pre-treated with hydrolytic enzymes aided by transition metal salts (FeCl3). This was followed by pressurized hot water extraction (PHWE) to release stevioside. The crude extract was purified and clarified through multi-stage membrane filtration. The results confirm that metal salt-assisted cellulase pre-treatment enhanced the yield of stevioside to 72%, with 98% purity, which was higher in comparison to existing methods. Thus, the methodology developed establishes a simple, “green”, enzyme-mediated process for the efficient isolation of stevioside under economical and eco-friendly conditions.
Effect of mixture constituents on the laminar burning velocity of LPG-Co2-air mixtures
Ajay Tripathi,H. Chandra,M. Agrawal
Journal of Engineering and Applied Sciences , 2010,
Abstract: One of the most attractive applications of Liquefied petroleum gas (LPG) is its use in IC engines, particularly for automotive applications, as it is known to be a clean source of energy. Even though it is already being used in IC engines, the fundamental combustion properties such as laminar burning velocities, which is a physicochemical property of a fuel, is still not very well established, which can act as a basic input for engine modeling. The present work utilizes a few standard methods of flame speed measurement known from the literature to obtain the flame speed of LPG-air and LPG-air-diluent mixtures as a function of air-fuel ratio and diluent concentration. Variation of burning velocity obtained by two different experimental techniques, that is, orifice burner and cylindrical tube method for a mixture of LPG-air and diluent mixtures at different air fuel ratios is quantified. CO2 is selected as a diluent to account for the presence of exhaust gases in the fresh charge as a consequence of exhaust gas recirculation. It was found that there is effect on burning velocity with the variation of effects of diluents on the burning velocities have been found to cause performance problems for combustion appliances using these types of fuel gases.
Technique and indications for surgery of the inferior oblique muscle
Rohatgi J,Singh H,Chandra Bimal
Indian Journal of Ophthalmology , 1983,
Fibular grafting with cannulated hip screw fixation in late femoral neck fracture in young adults
Goyal R,Chandra H,Pruthi K,Nirvikalp
Indian Journal of Orthopaedics , 2006,
Abstract: Background: We reviewed the operative results of fibular bone graft with cannulated hip screw fixation in femoral neck fracture in young adults. Method: Sixteen young adults with femoral neck fracture were treated by fibular bone graft with cannulated hip screw fixation. All the fractures were more than 3 weeks old. Results: Results were assessed in 15 patients while one patient died due to complications not related to surgery. Union occurred in all 15 patients. One patient had intra-operative complication in the form of screw cut out with graft in the joint space. The average fallow up was 24.4 months. Out of 15 patients assessed clinico-radiologically 11 showed good results, 3 had fair while 1 had poor result. Conclusion: We conclude that this is a simple and cost effective procedure for late femoral fleck fracture in young adults with good results.
Forgery Detection in Offline Handwritten Signature using Global and Geometric Features
Ashish Chandra Verma,Dipankar Saha,H. Saikia
International Journal of Computer & Electronics Research , 2013,
Abstract: Signature authentication is the most widely used method of verifying a person’s identity. Verification can be performed either Offline or Online based on the application. Features discussed in this paper are Global and Geometric features. Before extracting the features, pre-processing of a scanned image is necessary to isolate the region of interest part of a signature and to remove any spurious noise present. The system is initially trained using a database of signatures obtained from those individuals whose signatures are to be authenticated by the system. All the features are computed for training samples of signature. There are some variation itself in features of genuine set of signatures. By computing Euclidian distance between mean signature and all training set of signature, acceptance range is set. If a query signature is in the acceptance range then it is an authenticated signature else, it is a forged signature.
Common fixed points of weakly compatible maps in symmetric spaces
H. Chandra,A. Bhatt,S. Pant
Applied Mathematical Sciences , 2012,
Preventive Maintenance of Rotating Machines Using Signal Processing Techniques
A. Ganguly,Manoj K Kowar,H. Chandra
International Journal of Soft Computing & Engineering , 2012,
Abstract: This paper presents a method for analyzing the vibration signals of rotating machines and diagnoses preventive maintenance requirements using Vibration Signature Analysis Technique. The concept of Vibration Signature Analysis of Rotating Machines lies on the fact that all rotating machines in good condition have a fairly stable vibration pattern, which can be considered its 'Signature'. Under any anomalous condition of working of such machines, the vibration pattern gets changed. The amount of variation can be detected and the nature of anomalies can be analyzed to get an idea about the malfunctioning of the rotating machine. In order to develop the technique to be applied, it is proposed to simulate the vibration signals of a rotating machines using MATLAB to store the signature of rotating machines under healthy conditions. Deformation can now be introduced in the signature or can be acquired from other sources. Such deformed signals are to be processed in order to know the type of defect the rotating parts of the machine is suffering from. Based on the type of defect, preventive maintenance schedule can be proposed. This paper also aims at overcoming the limitations of traditional Vibration Signature Analysis techniques.
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