Articles and Recent News
A Smart-home System to Unobtrusively and Continuously Assess Loneliness in Older Adults
Loneliness is a common condition in older adults and is associated with increased morbidity and mortality, decreased sleep quality, and increased risk of cognitive decline. Assessing loneliness in older adults is challenging due to the negative desirability biases associated with being lonely. Thus, it is necessary to develop more objective techniques to assess loneliness in older adults.
More Than Just Accuracy: A Novel Method to Incorporate Multiple Test Attributes in Evaluating Diagnostic Tests Including Point of Care Tests
Current frameworks for evaluating diagnostic tests are constrained by a focus on diagnostic accuracy, and assume that all aspects of the testing process and test attributes are discrete and equally important. Determining the balance between the benefits and harms associated with new or existing tests has been overlooked. Yet, this is critically important information for stakeholders involved in developing, testing, and implementing tests.
Assessment of Carbon/Salt/Adhesive Electrodes for Surface Electromyography Measurements
We developed and tested new EMG electrodes that do not require hydrogel. The electrode is composed of carbon/salt/adhesive (CSA). We compared the performance of CSA to the standard Ag/AgCl electrodes subjected to various muscle contractions and relaxation movements. We found no significant differences in the signals’ amplitude, activation times and dynamics between two media during all muscle movements. Moreover, the CSA electrodes were found to be more resistant to noise and motion artifact contamination, and with lower spectral distortion than Ag/AgCl electrodes. CSA electrodes are potentially a suitable surrogate for Ag/AgCl electrodes for EMG with the added benefits of an infinite shelf-life and potentially lower cost.
Design and Application of a New Automated Fluidic Visceral Stimulation Device for Human fMRI Studies of Interoception
Mapping the brain centers that mediate the sensory-perceptual processing of visceral afferent signals arising from the body (i.e., interoception) is useful both for characterizing normal brain activity and for understanding clinical disorders related to abnormal processing of visceral sensation such as stress incontinence and gastroesophageal reflux disease. Here, we report a novel closed-system, electrohydrostatically driven master–slave device that was designed and constructed for delivering controlled fluidic stimulations of visceral organs and inner cavities of the human body within the confines of a 3T MRI scanner.
Comparative Study of Wavelet Based Unsupervised Ocular Artifact Removal Techniques for Single Channel EEG Data
Electroencephalogram (EEG) is a technique for recording asynchronous activation of neuronal firing inside the brain with non-invasive scalp electrodes. Artifacts such as eye blink activities can corrupt these neuronal signals. While ocular artifact (OA) removal is well investigated for multiple channel EEG systems, in alignment with the recent momentum towards minimalistic EEG systems for use in natural environments, we investigate unsupervised and effective removal of OA from single-channel streaming raw EEG data.
Elucidating the Hemodynamic Origin of Ballistocardiographic Forces: Towards Improved Monitoring of Cardiovascular Health at Home
The ballistocardiogram (BCG), a signal describing the reaction forces of the body to cardiac ejection of blood, has recently gained interest in the research community as a potential tool for monitoring the mechanical aspects of cardiovascular health for patients at home and during normal activities of daily living.