Dislocation scattering in a two-dimensional electron gas

A theory of scattering by charged dislocation lines in a two-dimensional electron gas (2DEG) is developed. The theory is directed towards understanding transport in AlGaN/GaN high-electron-mobility transistors (HEMT), which have a large number of line dislocations piercing through the 2DEG. The scattering time due to dislocations is derived for a 2DEG in closed form. This work identifies dislocation scattering as a mobility-limiting scattering mechanism in 2DEGs with high dislocation densities. The insensitivity of the 2DEG (as compared to bulk) to dislocation scattering is explained by the theory.Comment: 6 pages, 3 figure

Food in the West: Using TimelineJS in the Classroom

“Never underestimate the ‘hangry.’” This might as well be one of the learning objectives in my Foundations of Western Civilization course at Utah State University. Whether the bread riots of the 1790s in France, the “Hungry 1840s,” or the starvation of Russian citizens after the conclusion of World War II, food (and access to it) has continued to be a mobilizing factor in history. By examining what people ate and how they ate at different points in time, we can know a lot about a particular era’s economic conditions, social mores, political conflicts, religious issues, and nutrition. For the past three semesters, my students have used Northwestern University Knight Lab’s TimelineJS to create a digital chronology of the history of food in Western civilizations from roughly 1700 to 2001. Using food as a lens to examine the history of the modern West with a digital timeline is an illuminating and engaging method to teach a general education survey

Small Changes for a Big Impact: A Review of Small Teaching Online: Applying Learning Science in Online Classrooms by Flower Darby

A review of Flower Darby’s 2019 Small Teaching Online: Applying Learning Science in Online Classrooms. This article provides a narrative review of Darby’s work and the “small teaching approach,” focusing on the practical skills that Darby provides for the online classroom. Comments are gleaned from the author and two learning circles (one sponsored by USU and another independent) on the book

Conceptions of Christ in nineteenth and twentieth century art

Thesis (M.A.)--Boston Universit

Chapter 9- I\u27m Just not Good at History : Fostering a Growth Mindset With Habits of Mind

One of the most common frustrations I hear from students in my large-enrollment history survey, HIST 1110: European History from 1500, is that they have “never been good at history.” Having taken numerous history courses during their K–12 education, many of which have focused on the rote memorization of dates, names, and facts about the past, students can arrive to HIST 1110 with an apathetic—or even a negative—disposition toward history as an academic discipline. They were not able to remember historical details in past learning environments, so would a college history course be any different