Mr. Mohammad M. Islam Profile

Mohammad M. Islam

Research Assistant at Univ of Maryland Baltimore County

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Publications (7)

Proceedings Article | 14 May 2018 Presentation + Paper

Theoretical and experimental studies of transcranial alternating current stimulation (tACS) beating signal in phantoms and mice brains

Qinglei Meng, Deepa Gupta, Mohammad Islam, Mary Kay Lobo, Hyungwoo Nam, Fow-Sen Choa

Proceedings Volume 10662, 106620D (2018) https://doi.org/10.1117/12.2304947

KEYWORDS: Electrodes, Brain, Modulation, Brain stimulation, Amplifiers, Signal detection, Skull, Neurons, Head, Medicine

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Proceedings Article | 14 May 2018 Presentation + Paper

Kapton polyimide-based EEG microelectrode array and interfaces for mice brainwave recordings and analysis

D. Gupta, M. Islam, H. Nam, M. K. Lobo, F.-S. Choa

Proceedings Volume 10662, 106620A (2018) https://doi.org/10.1117/12.2305145

KEYWORDS: Electroencephalography, Brain, Electrodes, Remote sensing, Visual cortex, Somatosensory cortex, Animal model studies, Head, Skull, Copper

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Proceedings Article | 20 May 2016 Paper

InGaAs/InP PIN photodetector arrays made by MOCVD based zinc diffusion processes

Mohammad Islam, J. Feng, Andrew Berkovich, Pamela Abshire, Geoffrey Barrows, Fow-Sen Choa

Proceedings Volume 9819, 98190G (2016) https://doi.org/10.1117/12.2224297

KEYWORDS: Diffusion, Zinc, Detector arrays, Metalorganic chemical vapor deposition, Sensors, Annealing, Indium gallium arsenide, Doping, Semiconducting wafers, Metals

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Proceedings Article | 13 May 2015 Paper

Combined microphone array and lock-in amplifier operations for outdoor photo-acoustic sensing

Mohammad Islam, Joshua Lay, Chen-Chia Wang, Sudhir Trivedi, Alan Samuels, Jacob Khurgin, Fow Sen-Choa

Proceedings Volume 9486, 94860L (2015) https://doi.org/10.1117/12.2177536

KEYWORDS: Amplifiers, Signal to noise ratio, Reflectors, Interference (communication), Acoustics, Signal detection, Standoff detection, Photoacoustic spectroscopy, Environmental sensing, Signal generators

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Proceedings Article | 13 May 2015 Paper

Global nuclear radiation monitoring using plants

Mohammad Islam, Carlos Romero-Talamas, Dan Kostov, Wanpeng Wang, Zhongchi Liu, Daniel Hussey, Eli Baltic, David Jacobson, Jerry Gu, Fow-Sen Choa

Proceedings Volume 9486, 94860S (2015) https://doi.org/10.1117/12.2177532

KEYWORDS: Luminescence, Nuclear radiation, Environmental sensing, Spectroscopy, Gamma radiation, Data modeling, Bismuth, Crystals, Heat flux, Soil contamination

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Publisher’s Note: This paper, originally published on 5/13/2015, was replaced with a corrected/revised version on 7/1/2015. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance.

Plants exhibit complex responses to changes in environmental conditions such as radiant heat flux, water quality, airborne pollutants, soil contents. We seek to utilize the natural chemical and electrophysiological response of plants to develop novel plant-based sensor networks. Our present work focuses on plant responses to high-energy radiation – with the goal of monitoring natural plant responses for use as benchmarks for detection and dosimetry. For our study, we selected a plants cactus, Arabidopsis, Dwarf mango (pine), Euymus and Azela. We demonstrated that the ratio of Chlorophyll a to Chlorophyll b of the leaves has changed due to the exposure gradually come back to the normal stage after the radiation die.

We used blue laser-induced blue fluorescence-emission spectra to characterize the pigment status of the trees. Upon blue laser excitation (400 nm) leaves show a fluorescence emission in the red spectral region between 650 and 800nm (chlorophyll fluorescence with maxima near 690nm and 735 nm). Sample tree subjects were placed at a distance of 1m from NIST-certified 241AmBe neutron source (30 mCi), capable of producing a neutron field of about 13 mrem/h. This corresponds to an actual absorbed dose of ~ 1 mrad/h.

Our results shows that all plants are sensitive to nuclear radiation and some take longer time to recover and take less. We can use their characteristics to do differential detection and extract nuclear activity information out of measurement results avoid false alarms produced environmental changes. Certainly the ultimate verification can be obtained from genetic information, which only need to be done when we have seen noticeable changes on plant optical spectra, mechanical strength and electrical characteristics.

Proceedings Article | 10 June 2014 Paper

The electrical response of plants under radiation

Mohammad Islam, Wenze Xi, David J. Feng, Fow-Sen Choa

Proceedings Volume 9073, 90731E (2014) https://doi.org/10.1117/12.2050831

KEYWORDS: Ultraviolet radiation, Electrodes, Surface plasmons, X-rays, Gamma radiation, Silver, Combustion, Radiation effects, Switches, Nuclear radiation

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Proceedings Article | 22 May 2014 Paper

Control channels in the brain and their influence on brain executive functions

Qinglei Meng, Fow-Sen Choa, Elliot Hong, Zhiguang Wang, Mohammad Islam

Proceedings Volume 9107, 910716 (2014) https://doi.org/10.1117/12.2050147

KEYWORDS: Brain, Neurons, Electroencephalography, Acoustics, Action potentials, Oxygen, Ear, Information visualization, Neuroimaging, Thalamus

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Showing 5 of 7 publications

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