Valencia Koomson
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View article: Home-based blood pressure monitoring using the AHOMKA care model: a longitudinal single-group pilot study in Accra
Home-based blood pressure monitoring using the AHOMKA care model: a longitudinal single-group pilot study in Accra Open
Background: Hypertension is a major risk factor for cardiovascular disease and requires long-term health treatment and ongoing monitoring to the extent that traditional management approaches may be limited in providing. Adopting appropriat…
View article: Frequency-domain instrument with custom ASIC for dual-slope near-infrared spectroscopy
Frequency-domain instrument with custom ASIC for dual-slope near-infrared spectroscopy Open
Real-time and non-invasive measurements of tissue concentrations of oxyhemoglobin (HbO2) and deoxyhemoglobin (HbR) are invaluable for research and clinical use. Frequency-domain near-infrared spectroscopy (FD-NIRS) enables non-invasive mea…
View article: Optimization of Oligomer Stamping Technique for Normally Closed Elastomeric Valves on Glass Substrate
Optimization of Oligomer Stamping Technique for Normally Closed Elastomeric Valves on Glass Substrate Open
Microscale elastomeric valves are an integral part of many lab-on-chip applications. Normally closed valves require lower actuation pressures to form tight seals, making them ideal for portable devices. However, fabrication of normally clo…
View article: A Hybrid VLC/RF Parking Automation System
A Hybrid VLC/RF Parking Automation System Open
This paper proposes an innovative and integrated parking automation system based on visible light communication (VLC) and radio frequency (RF) wireless technologies. The VLC and RF are used for vehicle-to-infrastructure communication, infr…
View article: Directional visible light communication signal enhancement using a varifocal micromirror with four degrees of freedom
Directional visible light communication signal enhancement using a varifocal micromirror with four degrees of freedom Open
We present the use of a micromirror to dynamically improve an optical wireless communiciations link. The signal-to-noise ratio (SNR) is improved by directing the output of a 675 nm laser diode modulated at 10 MHz toward a receiver and by v…