The purpose of this study was to determine the
effects of a six-week career planning dropout prevention
program on the self-concepts and academic achievement of
at-risk middle school students in an inner-city public
school environment. The research population consisted of
1,434 students (grades seven, eight and nine) attending an
inner...
With the introduction of high speed semiconductor power devices and the
increased application of adjustable speed drives (ASDs) for efficient speed control of ac
motors, there has been a growing number of costly motor-drive related process failures. It
has been found that the high dv/dt and high switching frequency have...
Power quality has become an important concern to both electric utilities and
end users due to the increased use of non-linear loads in modem power systems
over the past decade. Nonlinear loads inject harmonics into the power system and
thus may lead to poor power quality and lower power factor....
Advanced low power devices promote the development of micro power generators (MPGs) to replace the batteries to power them. Due to the trend in decreasing integrated circuit (IC) supply voltages, power supply designers are facing more and more serious challenges. The objective of this research is to design a power...
With the development of high performance power electronic and semiconductor technologies, Adjustable Speed Drive (ASD) systems are increasingly applied in residential, commercial and industrial applications. Due to the advantages at higher power ratings, the three-level Neutral-Point-Clamped (NPC) Voltage Source Inverter (VSI) is being employed in industrial and traction applications, static...
Traditionally linear actuator applications are addressed by the use of hydraulic systems. The high maintenance cost and poor reliability will always be the most critical problem in the real applications. Benefited from both the high mechanical advantage of the roll screw and the simple structure of the switched reluctance motor,...
This qualitative study investigated the sibling relationship as it was described through the voices of the children. Ten sibling dyads (brother-sister or brother-brother) involved in family treatment following the discovery of sibling incest were interviewed. Participants in this study were participants in an outpatient clinic in the Northwest during the...