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Author

V. Jagadeesh Kumar

Other affiliations: Indian Institutes of Technology
Bio: V. Jagadeesh Kumar is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Signal conditioning & Capacitive sensing. The author has an hindex of 15, co-authored 83 publications receiving 637 citations. Previous affiliations of V. Jagadeesh Kumar include Indian Institutes of Technology.


Papers
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01 Jan 2015
TL;DR: A simple gas chromatography method using flame ionization detector has been developed and validated for the quantitative determination of trace level of oxalyl chloride(quantified as diethyl oxalate) in Zolpidem tartrate drug substance as mentioned in this paper.
Abstract: A simple gas chromatography method using flame ionization detector has been developed and validated for the quantitative determination of trace level of oxalyl chloride(quantified as diethyl oxalate) in Zolpidem tartrate drug substance. Efficient chromatographic separation was achieved on DB-35 capillary gc column, 30 m long, 0.53 mm internal diameter with 1.0 μm film thickness, employing programmed temperature with split mode (1:2) and run time was 60 min. The optimized method was validated for specificity, precision, linearity, robustness and accuracy. The obtained detection and quantitation limits of oxalyl chloride were 3 μg/g and 9 μg/g respectively. The method was found to be linear in the range between 9 μg/g and 750 μg/g with correlation coefficient 0.9996. The obtained average recovery of oxalyl chloride was 99.5 %. The detailed experiment results are discussed in this research paper.

2 citations

Proceedings ArticleDOI
23 Sep 1996
TL;DR: The wave energy group at the Indian Institute of Technology, Madras, India, in coordination with the National Institute of Ocean Technology (NIT), Madras has successfully installed a pilot wave energy plant of the oscillating water column (OWC) type, at Vizhinjam, on the west coast of India.
Abstract: The wave energy group at the Indian Institute of Technology, Madras, India, in coordination with the National Institute of Ocean Technology, Madras has successfully installed a pilot wave energy plant of the oscillating water column (OWC) type, at Vizhinjam, on the west coast of India. The wave energy plant (WEP) consists of a concrete caisson OWC pneumatically driving a Wells type turbine. The turbine is mechanically coupled to an induction generator (IG). The stator of the IG is connected to the electrical grid of the Kerata State Electricity Board. This paper describes the control instrumentation and data acquisition aspects of the WEP. Simple data collected on the power module are also provided in the form of graphs.

2 citations

Journal ArticleDOI
TL;DR: Results from the clinical validation establish the practicability of the proffered magnetoplethysmogram system and the basic principle of modulated magnetic signature of blood (MMSB), is validated with clinical trial.
Abstract: A novel magnetoplethysmogram (MPG) system is designed and developed for the real time, noninvasive monitoring of hemoglobin concentration in arterial blood. The basic principle of modulated magnetic signature of blood (MMSB), is validated with clinical trial. The MPG probe consists of a permanent magnet and a Giant Magneto Resistance (GMR) sensor. A strap and stand design enable reliable capture of continuous cycles of MPG with relative ease. Clinical validation with data from 64 patients carried out at the institute hospital of IIT Madras, using the proposed system gave a worst-case error of 6.5% in the measurement of hemoglobin concentration in arterial blood. Linear regression analysis using least square method, exhibited a standard deviation of 0.64 g/dL. Results from the clinical validation establish the practicability of the proffered MPG system.

2 citations

Proceedings ArticleDOI
05 May 2009
TL;DR: A virtual instrument developed for acquiring a series of visual and near infrared images of the affected area and subsequent off-line analysis and presentation of the results for stimulated dermal perfusion and inhibition is described.
Abstract: Determining the extent of dermal perfusion is crucial in assessing the healing of chronic wounds, of the kind encountered in diabetic ulcers and burns. An automated, contact-less, non-invasive means of analyzing the dermal perfusion in selected areas would be useful in this process. Such a technique is presented in this paper. It describes a virtual instrument developed for acquiring a series of visual and near infrared images of the affected area and subsequent off-line analysis and presentation of the results. The virtual instrument has been tested with satisfying results for stimulated dermal perfusion and inhibition.

2 citations

Proceedings ArticleDOI
01 May 2017
TL;DR: A non-contact inductive voltage divider (IVD) type displacement transducer that directly provides a digital output proportional to the displacement of the non- contact (floating) wiper is presented here.
Abstract: A non-contact inductive voltage divider (IVD) type displacement transducer that directly provides a digital output proportional to the displacement of the non-contact (floating) wiper is presented here. The floating wiper IVD becomes an integral part of a suitably modified dual slope type digital converter (DSDC) and the logic of conversion ensures that the digital output of the DSDC is not affected by the changes in the distance between the floating wiper and the inductive element. Simulation and emulation studies have been carried out to establish the feasibility and functionality of the proposed method. Experimentation on a prototype non-contact inductive angular displacement sensor built in the laboratory further corroborates the efficacy of the proffered technique.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: A new ECG enhancement method based on the recently developed empirical mode decomposition (EMD) that is able to remove both high-frequency noise and BW with minimum signal distortion and is validated through experiments on the MIT-BIH databases.

604 citations

Journal ArticleDOI
TL;DR: A comprehensive review of wave energy converters and air turbines can be found in this paper, together with a survey of theoretical, numerical and experimental modelling techniques of OWC converters.

594 citations

Journal ArticleDOI
TL;DR: This study presents an overview of the wide range of IPPG systems currently being introduced along with examples of their application in various physiological assessments and believes that the widespread acceptance ofIPPG is happening, and it will dramatically accelerate the promotion of this healthcare model in the near future.
Abstract: Photoplethysmography (PPG) is a noninvasive optical technique for detecting microvascular blood volume changes in tissues. Its ease of use, low cost and convenience make it an attractive area of research in the biomedical and clinical communities. Nevertheless, its single spot monitoring and the need to apply a PPG sensor directly to the skin limit its practicality in situations such as perfusion mapping and healing assessments or when free movement is required. The introduction of fast digital cameras into clinical imaging monitoring and diagnosis systems, the desire to reduce the physical restrictions, and the possible new insights that might come from perfusion imaging and mapping inspired the evolution of the conventional PPG technology to imaging PPG (IPPG). IPPG is a noncontact method that can detect heart-generated pulse waves by means of peripheral blood perfusion measurements. Since its inception, IPPG has attracted significant public interest and provided opportunities to improve personal healthcare. This study presents an overview of the wide range of IPPG systems currently being introduced along with examples of their application in various physiological assessments. We believe that the widespread acceptance of IPPG is happening, and it will dramatically accelerate the promotion of this healthcare model in the near future.

434 citations