Revati Shriram

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Measurement of blood volumetric changes in human body by photoplethysmographic sensors is used in present study. Objective is to measured different parameters that are heart rate, respiratory rate, BP. PPG signal is acquired by PPG sensor, microcontroller and RS 232. The acquired PPG signal is displayed in MATLAB. Frequency domain analysis of PPG signal(More)
Dental biometric system is used to identify deceased individual. Dental biometric system is used in forensic science. In this system AM radiograph is matched with PM radiograph to identify unidentified individual. Dental biometrics consists of four steps as: preprocessing of dental radiograph, segmentation, feature extraction and matching of AM and PM(More)
— Brain-mapping techniques have proven to be vital in understanding the molecular, cellular, and functional mechanisms of the brain. Normal anatomical imaging can provide structural information on certain abnormalities in the brain. However there are many neurological disorders for which only structure studies are not sufficient. In such cases it is(More)
— Action, cognition, emotion and perception can be mapped in the brain by using set of techniques. Translating unimodal concepts from one modality to another is an important step towards understanding the neural mechanisms. This paper provides a comprehensive survey of multimodal analysis of brain signals such as fMRI, EEG, MEG, NIRS and motivations,(More)
Coherence analysis can be detect for coordination of EEG rhythms between brain areas. It could not reflect the dynamic properties changing with time. Coherence analysis is a method developed on base of classic coherence analysis and signal's joint time-frequency representations in recent years. It was used to extract transient characteristics of(More)
Peripheral pulse captured with the help of optical sensor placed on an appendage, is known as photoplethysmography (PPG). PPG can be recorded by using reflectance or transmittance type of probe. Transmittance type of probe is used only at the sites were tissue denseness is lower. While the reflectance type of probe is independent of tissue denseness, if it(More)
To understand 'Working of Human Brain', measurements related to the brain function are required. These measurements should be possibly non-invasive. Brain should be disturbed as less as possible during the measurement. Integration of various modalities plays a vital role in understanding the cognitive and the behavioral changes in the human brain. It is an(More)
Modern work requires multitasking and the need for sustained vigilance, which result in work-related stress and increase the possibility of human error. So methods for estimating cognitive overload and mental fatigue of the brain during work performance are needed. Cognitive load (CL) refers to the amount of mental demand imposed by a task on a person, and(More)