Opportunity is the driving force of migration. Unsatisfied demands for higher education and skills, which have been created by the knowledge-based global economy, have generated unprecedented opportunities in knowledge-intensive service industries. These multi-trillion dollar industries include information, communication, finance, business, education and health. The leading industrialized natio...

This paper proposes and demonstrates the extraction of MOSFET threshold voltage, source-drain resistance, gate field mobility reduction factor, and transistor gain factor from the measurement of the small-signal source-drain conductance of a transistor as a function of dc gate bias with zero dc drain bias. The theory is based on the analytical model that includes the effects of source-drain res...

A Quasi-two Dimensional HEMT model is presented which for the first time describes accurately the I-V characteristics close to device pinch-off and at high drain current. The model uses a new analytical model for describing the injection of charge into the buffer material. This analytical description works in conjunction with an asymptotic boundary condition in the charge control solution to dr...

We have investigated RF degradation in GaN high electron mobility transistors (HEMTs) with different gate placement in the source-drain gap. We found that devices with a centered gate show different degradation behavior from those with the gate placed closer to the source. In particular, centered gate devices degraded through a mechanism that has a similar signature as that responsible for high...

Obstructive uropathy is a condition in which the flow of urine is blocked. This causes the urine to back up and injure one or both kidneys. Obstructive uropathy occurs when urine cannot drain through a ureter. Urine backs up into the kidney and causes it to become hydronephrosis. This article introduces recent research reports as references in the renal unilateral partial ureteral obstruction (...

Carrier transport in normally-off n GaN/InAlN/AlN/GaN high electron mobility transistors is studied using two-dimensional numerical device simulation. We focus on the n GaN cap layer, which is removed under the gate, and its contribution to drain current. Our simulation results show that despite the high doping density and relatively high carrier concentration in this layer, no significant tran...

BACKGROUND Perioperative blood loss is still an unsolved problem in total knee arthroplasty (TKA). The efficacy of the preoperative use of tranexamic acid (TXA) plus drain-clamping to reduce blood loss in TKA has been debated. This meta-analysis aimed to illustrate the efficacy of TXA plus drain-clamping to reduce blood loss in patients who underwent a TKA. METHODS In February 2017, a systema...

43 A is an important water management practice in the midwestern United States to remove excess water from poorly drained areas and to provide traffi cable conditions for agricultural production. About 30% of the total land area and 50% of the crop land in Indiana is subsurface drained (Economic Research Service, 1987). Th ere are growing concerns about the potential negative environmental impa...