Electrical & Computer Engineering

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Research from the Department of Electrical & Computer Engineering. The department website may be found at https://www.ndsu.edu/ece/

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Browsing Electrical & Computer Engineering by browse.metadata.program "Biomedical Engineering"

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    Novel K2W7O22/Ti3C2 Nanocomposite-Based Sensor Device for Breath Acetone Analysis in Diabetic Patients
    (North Dakota State University, 2020) Ama, Obinna Henry
    Acetone in exhaled breath is gaining attention as a non-invasive means of quantifying blood glucose levels in Diabetics. This calls for development of novel biosensors for the detection of trace concentrations of acetone present in human breath. Traditional gas detection systems, such as GC/MS and chemiresistive sensors, are currently used for this purpose. However, these systems have limitations with regards to size, cost, and operating temperature. This work presents the K2W7O22/Ti3C2 nanocomposite sensor as breath acetone sensor that overcomes the limitations in traditional detection systems. Sensing experiments were conducted using 5 different sensor materials in varying ratios. KWO/Ti3C2 - ratio 2:1 (annealed) and KWO/Ti3C2 - ratio 2:1 (Unannealed) showed excellent sensitivity to 2.85ppm and 5.4ppm acetone concentration. These materials were then implemented in a prototype device. Material and device test results confirm the potentials of the novel KWO/Ti3C2 nanocomposite as a good sensor for breath acetone detection.
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    Thrombolysis of Blood Clots using Wirelessly Powered Inferior Vena Cava Filters
    (North Dakota State University, 2018) Schwarz, Nolan
    Venous thromboembolisms (VTE) are estimated to affect up to 900,000 individuals in the U.S. each year. Traditionally, VTE is treated prophylactically with anticoagulants or directly with thrombolytic therapies. Both treatments have significant limitations, side effects, and potentially fatal adverse effects. Inferior vena cava filters are another treatment for VTE but are less common because of risks like clot accumulation and occlusion. Modifying the standard filters to wirelessly powered thrombolytic filters combines the positive attributes of anticoagulants and thrombolytics without the associated adverse effects. Computer simulations and in vitro experiments were conducted to assess the feasibility and effectiveness of a wirelessly powered filter. The filters are designed to capture and then heat blood clots. At 55°C the D fragment domains of fibrin denature causing the entire structure to break apart. This allows the filter to prevent formation of new clots as well as dissolve captured clots, preventing accumulation.