Browsing Electrical Engineering by Publisher "SPIE"
Now showing items 1-12 of 12
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An experimental performance evaluation of the hybrid FSO/RF
( SPIE , 2017 , Conference)This paper is a first attempt to study the effects of atmospheric turbulences on hybrid free space optics/ radio frequency (FSO/RF) transmission system in Doha, Qatar. The state of Qatar is characterized by a Mediterranean ... -
High-resolution time-frequency distributions for fall detection
( SPIE , 2015 , Conference)In this paper, we examine the role of high-resolution time-frequency distributions (TFDs) of radar micro-Doppler signatures for fall detection. The work supports the recent and rising interest in using emerging radar ... -
Indoor test of the fog's effect on FSO link
( SPIE , 2017 , Conference)In order to distinguish the most rigorous model, we made a comparison between measurements data and the mostly used empirical models. These models use the visibility as a basic parameter to predict the fog attenuation. In ... -
Metal nanowire-graphene composite transparent electrodes
( SPIE , 2014 , Conference)Silver nanowires with 40 nm diameter and copper nanowires with 150 nm diameter were synthesized using low-temperature routes, and deposited in combination with ultrathin graphene sheets for use as transparent conductors. ... -
Micro-Doppler characteristics of elderly gait patterns with walking AIDS
( SPIE , 2015 , Conference)In this paper, we analyze the micro-Doppler signatures of elderly gait patterns in the presence of walking AIDS using radars. The signatures are based on real data experiments conducted in a laboratory environment using ... -
On the more accurate channel model and positioning based on time-of-arrival for visible light localization
( SPIE , 2017 , Article)This paper presents an improved propagation channel model for the visible light in indoor environments. We employ this model to derive an enhanced positioning algorithm using on the relation between the time-of-arrivals ... -
Radar fall detection using principal component analysis
( SPIE , 2016 , Conference)Falls are a major cause of fatal and nonfatal injuries in people aged 65 years and older. Radar has the potential to become one of the leading technologies for fall detection, thereby enabling the elderly to live independently. ... -
Radar fall detectors: A comparison
( SPIE , 2016 , Conference)Falls are a major cause of accidents in elderly people. Even simple falls can lead to severe injuries, and sometimes result in death. Doppler fall detection has drawn much attention in recent years. Micro-Doppler signatures ... -
Sol-gel deposited aluminum-doped and gallium-doped zinc oxide thin-film transparent conductive electrodes with a protective coating of reduced graphene oxide
( SPIE , 2016 , Article)Using a traditional sol-gel deposition technique, we successfully fabricated aluminum-doped zinc oxide (AZO) and gallium-doped zinc oxide (GZO) thin films on glass substrates. Employing a plasma treatment method as the ... -
Sol-gel deposition and plasma treatment of intrinsic, aluminum-doped and gallium-doped zinc oxide thin films as transparent conductive electrodes
( SPIE , 2015 , Conference)Zinc oxide and aluminum/gallium-doped zinc oxide thin films were deposited via sol-gel spin-coating technique. Employing plasma treatment as alternative to post thermal annealing, we found that the morphologies of these ... -
Transparent conducting electrodes based on thin, ultra-long Copper nanowires and graphene nano-composites
( SPIE , 2014 , Conference)High aspect-ratio ultra-long (> 70 ?m) and thin (< 50 nm) copper nanowires (Cu-NW) were synthesized in large quantities using a solution-based approach. The nanowires, along with reduced graphene-oxide sheets, were coated ... -
Ultra-high aspect ratio copper nanowires as transparent conductive electrodes for dye sensitized solar cells
( SPIE , 2016 , Conference)We report the synthesis of ultra-high aspect ratio copper nanowires (CuNW) and fabrication of CuNW-based transparent conductive electrodes (TCE) with high optical transmittance (>80%) and excellent sheet resistance (Rs <30 ...