Sivaramakrishnan S.,Larsen and Toubro Ltd
2015 International Conference on Computing and Network Communications, CoCoNet 2015 | Year: 2015
Owing to the non-linear characteristics of the Photovoltaic (PV) Module, Maximum Power Point Tracking (MPPT) algorithms to obtain the maximum power out of a PV module are gaining popularity over the years. This paper proposes a novel hybrid MPPT algorithm, which uses a combination of linear extrapolation and perturb and observe algorithm to determine the maximum power point of a PV module. Since the traditional perturb and observe (P&O) MPPT algorithm has the disadvantages of being slow, inaccurate and incorrect response to rapidly varying environmental conditions, the proposed algorithm is proven to be faster and more accurate in tracking MPP than the former. A C-program was coded to validate the proposed algorithm and the results are compared with P&O method. © 2015 IEEE.
Bhopatkar N.S.,Larsen and Toubro Ltd
Procedia Engineering | Year: 2014
To gain access to new markets and technology resources, as well as low-cost and multi-currency-based sourcing and offset obligations, major Original Equipment Manufacturers (OEMs) are expanding their footprint in Asia. It is mandatory to have EASA/FAA approvals including Civil Aviation Airworthiness approvals by DGCA, India for organizations engaged in manufacture of an aircraft/ component/ item of equipment or part to export products for commercial aircraft applications. Reyaneh Sayafi, Florence Leblond developed a Production Organization Exposition scheme taking into account EN9100 requirements. The objective was to study requirements of AS/EN9100, EASA, FAA and DGCA (India) to harmonize and prepare a concise Production Organization Exposition (POE) that complies with all requirements. This paper includes development of Production Organization Exposition (POE) manual to incorporate requirements of Quality Management Systems- Requirements for Aviation, Space and Defense Organizations (AS/EN 9100), European Aviation Safety Agency (EASA) Part 21 G, Federal Aviation Administration (FAA) CFR 14 Part 21 G and DGCA, India Part 21 Subpart G. A detailed comparison of AS/EN 9100, EASA, FAA and DGCA (India) requirements of Production Organization Exposition (POE) is conducted. A cross reference matrix has been prepared. For each important topic, it covers regulations, similarities and differences and then a harmonization which defines a common structure of procedures of Production Organization Exposition (POE) incorporating AS/EN9100, EASA, FAA and DGCA (India) requirements. Efforts in planning stage will ensure stringent requirements are deployed and enable minimum preparation time required to take up approvals from Civil Aviation Authorities. © 2014 Published by Elsevier Ltd.
Dey N.,Larsen and Toubro Ltd |
Dash T.P.,Trident Academy of Technology
International Journal of Biomedical Engineering and Technology | Year: 2011
Nowadays, Electrocardiogram (ECG) plays an important role in the primary diagnosis, prediction and survival analysis of cardiac diseases. Electrocardiography has had a profound influence on the practice of medicine. The ECG signal contains an important amount of information that can be exploited in different manners. The ECG signal allows for the analysis of anatomic and physiologic aspects of the whole cardiac muscle. Noise reduction in ECG signals is one of the main problems, which appear during analysis of electrical activity of the heart. Such noises are difficult to remove using typical filtering procedures. Efficient analytical tool, which allows increasing signal to noise ratio, is a technique of averaging of cardiac cycles. Effectiveness of this method strictly depends on stable sinus rhythm. Different ECG signals are used to verify the proposed method using MATLAB platform. In this paper, we have proposed Functional Link Artificial Neural Network (FLANN) for the denoising of the ECG signal. Copyright © 2011 Inderscience Enterprises Ltd.
Dholakia Y.N.,Larsen and Toubro Ltd |
Shah D.P.,Municipal Corporation of Greater Mumbai
Lung India | Year: 2013
Background: Characteristics and treatment outcomes of patients with drug-resistant tuberculosis (DR TB) before introduction of directly observed treatment strategy (DOTS) plus are infrequently reported. Aims: To study clinical characteristics and treatment outcomes of drug-resistant TB patients. Setting: A TB unit in Mumbai. Materials and Methods: A retrospective analysis of DR TB patients attending a TB unit and taking treatment at NGOs was performed. Of the 34 cases, 5 (14%) had mycobacterium other than tuberculosis, 24 were pulmonary TB, 4 extra-pulmonary TB, and one both. Three were HIV-infected, two had diabetes. Two cases were treatment naive. Of the 29 cases studied, 3 (11%) were mono-resistant, 20 (69%) were multidrug-resistant (MDR) TB with E/Z/EZ resistance; 4 were pure MDR TB. One case had XDR TB, 13 (44.8%) had resistance to at least one conventional second-line drug. Seven cases had adverse drug reaction, four requiring drug substitution. Two patients are on treatment; 14 of the remaining 27 (51%) were successfully treated, 5 (18%) died, 2 (7%) failed treatment, 5 (18%) were lost to follow-up, one migrated. Conclusion: DST profiles suggest high levels of drug resistance due to amplification which leads to poor outcomes. There is an urgent need for Indian Revised National TB Control Program to introduce daily DOTS for susceptible cases, DST for all new cases, and scaling up DST for second-line drugs. There is also a need to use individualized treatment for DR TB.
Yadav S.,P.A. College |
Kaushal M.,Larsen and Toubro Ltd |
Varun,National Institute of Technology Hamirpur |
Siddhartha,National Institute of Technology Hamirpur
Solar Energy | Year: 2014
Solar energy is a clean, abundant and easily available source of energy. Thermal performance of solar air heater does not take into account the energy loss due to friction for propelling air through the duct. In this work an attempt has been made to evaluate exergetic efficiency of roughened solar air heater duct provided with protrusions arranged in arc fashion over the absorber plate. The exergetic efficiency of a solar air heater was calculated analytically using developed correlations and the results were compared with that of a smooth flat-plate solar air heater. Design plots were also prepared in order to facilitate the designer for designing such type of roughened solar air heater within the investigated range of system and operating parameters. © 2014 Elsevier Ltd.