Jia Wang

Abstract Immigrant students, especially those with limited-English proficiency (LEP), perform less well than native-born students do. The authors explored the hypothesis that the LEP and immigrant students are channeled by schools (or self-selected) into less demanding courses, thereby reducing their opportunity to master core subjects in the curriculum. Data were taken from a large urban school district in California to investigate the roles of opportunity to learn (OTL), language proficiency,

Since the demonstration of p-type gallium nitride (GaN) through doping with substitutional magnesium (Mg) atoms^1,2, rapid and comprehensive developments, such as blue light-emitting diodes, have considerably shaped our modern lives and contributed to a more carbon-neutral society^3-5. However, the details of the interplay between GaN and Mg have remained largely unknown^6-11. Here we observe that Mg-intercalated GaN superlattices can form spontaneously by annealing

This work reports measured effective mobility vs. effective vertical electric field and the accompanying experimental method of extraction for the fully depleted (FD) SOI MOSFET. The effective channel mobility vs. effective vertical electric field behavior was investigated as a function of the SOI film doping concentration, the SOI back-gate bias, and the SOI film thickness. The validity of using the approximation, Q/sub i/=C/sub ox/(V/sub GS//spl minus/V/sub TH/), for the inversion charge densi

We demonstrated the formation of excellent Ohmic contact to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${p}$ </tex-math></inline-formula> -type GaN (including the plasma etching-damaged <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${p}$ </tex-math></inline-formula> -type GaN which otherwise exhibited undetectable curre

This study investigated the relationship between students' opportunity to learn (OIL) and their science achievement. The data are of 623 8th-graders enrolled in five public schools in Los Angeles, California. Hierarchical linear modeling was used to analyze OTL variables at two levels of instructional processes: the classroom level and the student level. Students' science test scores are based on a written test and a hands-on test. OTL effects on these two test scores were studied to see whether

In this study, graphene oxide/lanthanum coordination polymer (GLCP) nanocomposites are prepared and their bactericidal activities against seven typical Pathogenic bacteria are evaluated. The GLCPs are fabricated through the electrostatic self-assembly of La ions on negatively charged graphene oxide (GO), followed by the stabilization of π-π stacking to ensure the formation of lanthanum coordination polymers on the GO surface. The morphologies and structures of the synthesized GLCPs are character

A threshold voltage instability phenomenon at low temperatures in partially depleted thin-film silicon-on-insulator (SOI) SIMOX (separation by implantation of oxygen) MOSFETs is reported. This phenomenon was investigated under normal MOSFET operating conditions for temperatures ranging from 300 K down to 10 K, with both the magnitude and duration of the instability observed to be strongly dependent on temperature. Threshold voltage shifts as small as 0 V at room temperature and as large as 0.29