Performance of a spin-based insulated gate field effect transistor

Fundamental physical properties limiting the performance of spin field effect transistors are compared to those of ordinary (charge-based) field effect transistors. Instead of raising and lowering a barrier to current flow these spin transistors use static spin-selective barriers and gate control of spin relaxation. The different origins of transistor action lead to distinct size dependences of the power dissipation in these transistors and permit sufficiently small spin-based transistors to surpass the performance of charge-based transistors at room temperature or above. This includes lower threshold voltages, smaller gate capacitances, reduced gate switching energies and smaller source-drain leakage currents.Comment: 4 pages including 3 figures, APL in pres

1928 Ruby Yearbook

A digitized copy of the 1928 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1030/thumbnail.jp

1981 Ruby Yearbook

A digitized copy of the 1981 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1084/thumbnail.jp

Regional-scale brine migration along vertical pathways due to CO2 injection - Part 1: The participatory modeling approach

Saltwater intrusion into potential drinking water aquifers due to the injection of CO₂ into deep saline aquifers is one of the potential hazards associated with the geological storage of CO₂. Thus, in a site selection process, models for predicting the fate of the displaced brine are required, for example, for a risk assessment or the optimization of pressure management concepts. From the very beginning, this research on brine migration aimed at involving expert and stakeholder knowledge and assessment in simulating the impacts of injecting CO₂ into deep saline aquifers by means of a participatory modeling process. The involvement exercise made use of two approaches. First, guideline-based interviews were carried out, aiming at eliciting expert and stakeholder knowledge and assessments of geological structures and mechanisms affecting CO₂-induced brine migration. Second, a stakeholder workshop including the World Café format yielded evaluations and judgments of the numerical modeling approach, scenario selection, and preliminary simulation results. The participatory modeling approach gained several results covering brine migration in general, the geological model sketch, scenario development, and the review of the preliminary simulation results. These results were included in revised versions of both the geological model and the numerical model, helping to improve the analysis of regional-scale brine migration along vertical pathways due to CO₂ injection

1958 Ruby Yearbook

A digitized copy of the 1958 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1061/thumbnail.jp

1960 Ruby Yearbook

A digitized copy of the 1960 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1063/thumbnail.jp

1959 Ruby Yearbook

A digitized copy of the 1959 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1062/thumbnail.jp

1970 Ruby Yearbook

A digitized copy of the 1970 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1073/thumbnail.jp

1971 Ruby Yearbook

A digitized copy of the 1971 Ruby, the Ursinus College yearbook.https://digitalcommons.ursinus.edu/ruby/1074/thumbnail.jp

Artificial Intelligence

Contains research objectives and reports on eight research projects.Computation Center, M.I.T