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    A Unique Environmental Mobile Device for Detecting Hazardous Chemicals

    Heng, Iem ; Zhang, Andy ; Heimbinder, Michael ; Yap, Raymond
    Global Humanitarian Technology Conference (GHTC), 2012 IEEE

    DOI: 10.1109/GHTC.2012.19
    Publication Year: 2012 , Page(s): 59 - 65

    IEEE Conference Publications

    According to an analysis conducted by Greenpeace, “one in three Americans is at risk of a poison gas disaster by living near one of hundreds of chemical facilities that store and use highly toxic chemicals. A chemical disaster at just one of these facilities could kill or injure thousands of people with acute poisoning [1].” Because of the common proximity between residences and chemical facilities in the United States (U.S.), hazardous chemical detection and early warning systems is vital and frequently missing feature of public safety systems. In many instances, the cost of chemical detection equipment and monitoring systems is prohibitively expensive, preventing concerned citizens from participating in a hazardous chemical detection and early warning system. To address the need for an affordable, distributed, off-the-shelf hazardous chemical detection early warning system, this paper presents a method for designing and prototyping a unique environmental mobile device (EMD) for detecting hazardous chemicals. Employing affordable gas sensors, the EMD measures and communicates hazardous chemical concentrations to an Android smartphone or tablet custom-design app which time stamps and geolocates the measurements. Initial development efforts have focused on recording variability in sound levels, temperature, humidity, carbon monoxide (CO), and nitrogen dioxide (NO2) levels in the outdoor environment. The data logged by the EMD and app is then uploaded to an interactive web-based map that displays both individual and aggregated routing information. Both the smartphone app and web app use a simple color scale (green, yellow, orange, red) to indicate the intensity of the sensor readings at a particular place and time. In the future, the EMD and smartphone app could be used as part of distributed hazardous chemical detection and early warning system that would deliver real-time information and alerts to communities that may be at risk of hazard- us chemical exposures. View full abstract»

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    Using Solar Robotic Technology to Detect Lethal and Toxic Chemicals

    Heng, Iem ; Zhang, A.S. ; Harb, A.
    Global Humanitarian Technology Conference (GHTC), 2011 IEEE

    DOI: 10.1109/GHTC.2011.45
    Publication Year: 2011 , Page(s): 409 - 414
    Cited by:  Papers (2)

    IEEE Conference Publications

    In today's society, robots are used in many aspects of our lives. For instance, the robot is used as assistance at home, office workplace, hospital, industry plants, educational institution, waste disposal facilities, and others. However, the use of robots to detect and to avoid the exposure to toxic and harmful chemicals has not been addressed adequately. This remains a critical issue and a challenge. To face the challenge, the objective of this paper is to provide a unique perspective in designing and building a tele-operated (human operator with remote control) and autonomous robot (self-guided without human interference) that can detect harmful and lethal chemical gases (NO2, N2, CO, CO2, LPG, CH4, CNG, C2H5OH, NH3, H2 and others) on the ground. Applications include coal mine explosion prevention and detections of natural gas and other industrial and explosive chemicals leaks, detection of harmful gases in public gathering places such as subway stations, shopping malls, and airports. This solar chemical detection robot (SCDR) will potentially reduce the massive loss of human life and reduce the destruction to our environment resulting in land prosperity and a healthier ecosystem. The power management and distribution system of SCDR will be powered by an eco-friendly rechargeable battery which can be recharged during the day by solar energy. This will extend the service hours of the SCDR. View full abstract»

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    Cytochrome c release caused by Pulsed Electric Fields (PEFs) with different time durations

    Hao Wu ; Minghe Wu ; Heng Zou
    Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on

    DOI: 10.1109/MMWCST.2012.6238126
    Publication Year: 2012 , Page(s): 1 - 3

    IEEE Conference Publications

    Multilayer Dielectric Sphere Model (MDSM) is used for analyzing responses of cells to Pulsed Electric Fields (PEFs), and cytochrome c release is significant effect of PEFs when mitochondrial substructures are taken into account. Numerical results of MDSM model explain and verify the reported experimental results on Intracellular Electro-manipulation (IEM). It is proposed that two-step process of cytochrome c release can be implemented by bioelectric impulse effect on mitochondria. View full abstract»

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