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Virtual Clicker - A Tool for Classroom Interaction and Assessment
(Virginia Tech, 2011-12-02)
Actively engaging students in the classroom and promoting their interaction, both amongst themselves and with the instructor, is an important aspect to student learning. Research has demonstrated that student learning ...
Design and Implementation of Convex Analysis of Mixtures Software Suite
(Virginia Tech, 2012-08-07)
Various convex analysis of mixtures (CAM) based algorithms have been developed to address real world blind source separation (BSS) problems and proven to have good performances in previous papers. This thesis reported the ...
Concatenation of Space-Time Block Codes with ConvolutionalCodes
(Virginia Tech, 2004-02-12)
Multiple antennas help in combating the destructive effects of fading as well as improve the spectral efficiency of a communication system. Receive diversity techniques like maximal ratio receive combining have been popular ...
Analysis of an Embedded Singularity Chipless RFID Tag
(Virginia Tech, 2011-06-30)
The objective of this research is to explore the feasibility of a chipless RFID tag that stores a data signature in the form of complex frequency plane singularities. To this end an existing chipless RFID tag, the notched ...
Simulating Nitric Oxide in the lower thermosphere using a 3D model
(Virginia Tech, 2012-12-02)
Nitric oxide (NO), despite being a minor species, influences the chemistry, composition and energy balance of the earth's atmosphere above 90 kilometers. Variations in its density have been shown to strongly correlate with ...
A Location-aided Decision Algorithm for Handoff Across Heterogeneous Wireless Overlay Networks
(Virginia Tech, 2004-07-19)
Internetworking third generation (3G) technologies with wireless LAN (WLAN) technologies such as Universal Mobile Telecommunication Systems (UMTS) and IEEE 802.11, respectively, is an emerging trend in the wireless domain. ...
Denial-of-Service Attacks on Battery-Powered Mobile Computers
(Virginia Tech, 2004-01-12)
A Denial of Service (DoS) attack is an incident in which the user is deprived of the services of a resource he is expected to have. With the increasing reliance on mobile devices like laptops and palmtops, a new type of ...
A Flattened Hierarchical Scheduler for Real-Time Virtual Machines
(Virginia Tech, 2015-05-05)
The recent trend of migrating legacy computer systems to a virtualized, cloud-based environment has expanded to real-time systems. Unfortunately, modern hypervisors have no mechanism in place to guarantee the real-time ...
The Polarimetric Impulse Response and Convolutional Model for the Remote Sensing of Layered Vegetation
(Virginia Tech, 2007-03-05)
To date, there exists no complete, computationally efficient, physics-based model to compute the radar backscatter from forest canopies. Several models attempt to predict the backscatter coefficient for random forest ...
Optical Frequency Domain Reflectometry Based Quasi-distributed High Temperature Sensor
(Virginia Tech, 2013-12-09)
Temperature sensing in harsh environment is desired in many areas, such as coal gasification, aerospace, etc. Single crystal sapphire is an excellent candidate for construction of harsh environment sensors due to its ...