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Nagaraj Hegde
University of Alabama
Embedded systemWearable computerGaitComputer scienceAccelerometer
12Publications
7H-index
131Citations
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Publications 12
Newest
#1Nagaraj HegdeH-Index: 7
#2Matthew BriesH-Index: 2
view all 3 authors...
The article detailed the challenges in implementing a multisensor Android BLE application and a new methodology - SASC - was proposed to address these challenges. Benchmarking tests and free-living tests were conducted to validate the SASC implementation schemes. The benchmarking tests gave quantified results on metrics such as throughput, CPU loading on the smartphone and power consumption by the Android application for various number of sensors and varying connection intervals. The results of ...
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#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2Matthew Bries (UA: University of Alabama)H-Index: 2
Last. Edward Sazonov (UA: University of Alabama)H-Index: 27
view all 5 authors...
Automatic recognition of activities of daily living (ADL) is an important component in understanding of energy balance, quality of life, and other areas of health and well-being. In our previous work, we had proposed an insole-based activity monitor—SmartStep, designed to be socially acceptable and comfortable. The goals of the current study were: first, validation of SmartStep in recognition of a broad set of ADL; second, comparison of the SmartStep to a wrist sensor and testing these in combin...
17 CitationsSource
#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2Ting Zhang (UA: University of Alabama)H-Index: 7
Last. Edward Sazonov (UA: University of Alabama)H-Index: 27
view all 10 authors...
Cerebral palsy (CP) is a group of nonprogressive neuro-developmental conditions occurring in early childhood that causes movement disorders and physical disability. Measuring activity levels and gait patterns is an important aspect of CP rehabilitation programs. Traditionally, such programs utilize commercially available laboratory systems, which cannot to be utilized in community living. In this study, a novel, shoe-based, wearable sensor system (pediatric SmartShoe) was tested on 11 healthy ch...
6 CitationsSource
Jul 1, 2017 in EMBC (International Conference of the IEEE Engineering in Medicine and Biology Society)
#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2Matthew Bries (UA: University of Alabama)H-Index: 2
Last. Edward Sazonov (UA: University of Alabama)H-Index: 27
view all 4 authors...
Footwear based wearable sensors are becoming prominent in many areas of monitoring health and wellness, such as gait and activity monitoring. In our previous research we introduced an insole based wearable system SmartStep, which is completely integrated in a socially acceptable package. From a manufacturing perspective, SmartStep's electronics had to be custom made for each shoe size, greatly complicating the manufacturing process. In this work we explore the possibility of making a universal e...
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#1Nagaraj HegdeH-Index: 7
#1Nagaraj HegdeH-Index: 7
#2Matthew BriesH-Index: 2
Last. Edward SazonovH-Index: 27
view all 3 authors...
Footwear is an integral part of daily life. Embedding sensors and electronics in footwear for various different applications started more than two decades ago. This review article summarizes the developments in the field of footwear-based wearable sensors and systems. The electronics, sensing technologies, data transmission, and data processing methodologies of such wearable systems are all principally dependent on the target application. Hence, the article describes key application scenarios ut...
29 CitationsSource
Aug 1, 2016 in EMBC (International Conference of the IEEE Engineering in Medicine and Biology Society)
#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2Edward L. Melanson (Anschutz Medical Campus)H-Index: 40
Last. Edward Sazonov (UA: University of Alabama)H-Index: 27
view all 3 authors...
Footwear based activity monitoring systems are becoming popular in academic research as well as consumer industry segments. In our previous work, we had presented developmental aspects of an insole based activity and gait monitoring system-SmartStep, which is a socially acceptable, fully wireless and versatile insole. The present work describes the development of an Android application that captures the SmartStep data wirelessly over Bluetooth Low energy (BLE), computes features on the received ...
10 CitationsSource
Nov 1, 2015 in BIBM (Bioinformatics and Biomedicine)
#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2Edward Sazonov (UA: University of Alabama)H-Index: 27
Insole based wearable sensors are becoming popular in applications such as gait and physical activity monitoring, energy expenditure estimation, in providing biofeedback, fall risk and others. In the existing systems, the insole needs to be taken out of the shoe to recharge the battery, which is not a convenient task. The existing systems are application specific and can be used for a limited purpose. However, the desired system functionality for the shoe based wearable systems depends on factor...
10 CitationsSource
Aug 1, 2015 in EMBC (International Conference of the IEEE Engineering in Medicine and Biology Society)
#1Nagaraj Hegde (UA: University of Alabama)H-Index: 7
#2George D. Fulk (Clarkson University)H-Index: 20
Last. Edward Sazonov (UA: University of Alabama)H-Index: 27
view all 3 authors...
Regaining the ability to walk is a major rehabilitation goal after a stroke. Recent research suggests that, in people with stroke, task-oriented and intensive rehabilitation strategies can drive cortical reorganization and increase activity levels. This paper describes development and pilot testing of a novel wearable device for Real-Time Gait and Activity Improving Telerehabilitation (RT-GAIT), designed for use with such rehabilitation strategies. The RT-GAIT provides auditory or tactile feedba...
6 CitationsSource
#1Edward Sazonov (UA: University of Alabama)H-Index: 27
#2Nagaraj Hegde (UA: University of Alabama)H-Index: 7
Last. Nadezhda Sazonova (UA: University of Alabama)H-Index: 11
view all 5 authors...
The use of wearable sensors coupled with the processing power of mobile phones may be an attractive way to provide real-time feedback about physical activity and energy expenditure (EE). Here, we describe the use of a shoe-based wearable sensor system (SmartShoe) with a mobile phone for real-time recognition of various postures/physical activities and the resulting EE. To deal with processing power and memory limitations of the phone, we compare the use of support vector machines (SVM), multinom...
17 CitationsSource
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