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Qualitative Analysis of Student Perceptions of E-Portfolios in a Teacher Education Program
(
International Society for Technology in Education (ISTE)
, 2012 , Article)
In the last decade, e-portfolios have moved to the forefront of teacher preparation programs across the
United States. With its widespread use, faculty and administrators need to understand teacher candidates’ perspectives ...
Ubiquitous monitoring system for critical cardiac abnormalities
(
Springer
, 2012 , Book chapter)
In many critical cardiac abnormalities, it is desirable to have a monitoring system that can keep a constant surveillance on the conditions of the heart and its related patterns. This can be very convenient in clinical ...
A design example of an 8-pole radial AMB for flywheel energy storage
(
IEEE
, 2012 , Conference Paper)
High speed flywheel energy storage systems normally use magnetic bearings to reduce friction loss. Bearing load consists of radial forces with or without axial forces according to drive configuration and requirements. The ...
On the development of flywheel storage systems for power system applications: A survey
(
IEEE
, 2012 , Conference Paper)
Energy storage systems cannot be considered energy sources but having the ability of storing and discharging energy. They have a vital rule in the reliability and power quality of power systems. There are several energy ...
A wind turbine architecture employing a new three port magnetic gear box
(
IEEE Computer Society
, 2012 , Conference Paper)
Mechanical gearboxes are typically employed with doubly-fed induction generator based wind turbines to convert the turbine's low speed mechanical power into high-speed mechanical power to drive the electrical generator. ...
Elimination of reverse recovery effects associated with CoolMOS devices employing current source inverter topology
(
IET
, 2012 , Conference Paper)
MOSFET transistors are continuously being an essential part of power electronic converters due to their low switching losses at high switching frequencies. However, the traditional power MOSFET suffers from a relatively ...
Effect of current harmonic injection on constant rotor volume multiphase induction machine stators: A comparative study
(
IEEE
, 2012 , Article)
Although torque enhancement in multiphase induction machines using harmonic current injection has been addressed in the literature, a detailed assessment of the effect of this enhancement on the design parameters of ...
Fault ride-through capability enhancement based on flywheel energy storage system for wind farms connected via VSC high voltage DC transmission
(
Institution of Engineering and Technology
, 2012 , Conference Paper)
This paper proposes a recovery strategy for wind energy-fed voltage source converter high voltage DC transmission systems, capable of maintaining power balance between the AC and DC sides during different AC faults. This ...
Active and reactive power management of photovoltaic-based interline dynamic voltage restorer in low voltage distribution networks
(
IEEE Computer Society
, 2012 , Conference Paper)
A dynamic voltage restorer (DVR) is a series connected device that can support the voltage at existing critical loads during voltage sags. Voltage restoration may need active and/or reactive power injection into the ...
Simplified generic on-line PWM technique for single phase grid connected current source inverters
(
Institute of Electrical and Electronics Engineers Inc.
, 2012 , Conference Paper)
Mandatory restrictions for a current source inverter's (CSI's) proper operation, like continuity of the DC link current, complicate the corresponding PWM generation especially in the case of single phase systems. Classical ...