Alien Registration- Compton, Arthur S. (Farmington, Franklin County)

https://digitalmaine.com/alien_docs/19882/thumbnail.jp

Propagation of Alfven waves in the WVU HELIX device

Alfven waves are low frequency, long wavelength electromagnetic waves commonly found in space plasmas. As these waves typically have wavelengths on the order of kilometers, generating Alfven waves in the lab is quite difficult. At the appropriate plasma parameters, (e.g., high density and weak applied magnetic field strength), the wavelength of the Alfven wave will be small enough to fit into a reasonably sized experimental device. Here it will be shown that Alfven waves have been successfully propagated in the HELIX device in argon and helium plasmas

Pro-Environmental Behaviors Among Black Environmentalists: A Critical Race Perspective

Environmentalist narratives have left out the labor of Black environmentalists, mischaracterizing Black communities as disinterested in environmental problems or solutions. The purpose of this critical transformative exploratory qualitative study, guided by critical race theory, was to explore the meaning of pro-environmental behaviors among Black environmental advocates. Ten adult Black environmental advocates and organizers were interviewed using semi-structured interviews which were transcribed and analyzed using directed content analysis and thematic analysis. The findings demonstrated divergences between definitions of the environment and how that impacts what is considered pro-environmental behavior; the breadth of the pro-environmental behaviors in which Black environmentalists are engaged; racism’s impact on Black visibility in environmental spaces in the past, present and future; and the need to address Black visibility in environmental spaces as a critical pro-environmental behavior going forward. Implications for those in environmental spaces, including funders, social workers, and researchers, are addressed as well as the methodological implications on reflexivity and emergence learned in the process of the study

Annealing of fast neutron damage in impurity-conducting n-type germanium

Thermal annealing of fast neutron induced changes in electrical properties of highly doped n-type germaniu

FREE-FLIGHT MEASUREMENTS OF STATIC AND DYNAMIC STABILITY OF MODELS OF THE PROJECT MERCURY RE-ENTRY CAPSULE AT MACH NUMBERS 3 AND 9.5

Static & dynamic stability of mercury reentry capsule scale models at mach 3 & 9.

Multi-Gain-Stage InGaAs Avalanche Photodiode with Enhanced Gain and Reduced Excess Noise

We report the design, fabrication, and test of an InGaAs avalanche photodiode (APD) for 950-1650 nm wavelength sensing applications. The APD is grown by molecular beam epitaxy on InP substrates from lattice-matched InGaAs and InAlAs alloys. Avalanche multiplication inside the APD occurs in a series of asymmetric gain stages whose layer ordering acts to enhance the rate of electron-initiated impact ionization and to suppress the rate of hole-initiated ionization when operated at low gain. The multiplication stages are cascaded in series, interposed with carrier relaxation layers in which the electric field is low, preventing avalanche feedback between stages. These measures result in much lower excess multiplication noise and stable linear-mode operation at much higher avalanche gain than is characteristic of APDs fabricated from the same semiconductor alloys in bulk. The noise suppression mechanism is analyzed by simulations of impact ionization spatial distribution and gain statistics, and measurements on APDs implementing the design are presented. The devices employing this design are demonstrated to operate at linear-mode gain in excess of 6000 without avalanche breakdown. Excess noise characterized by an effective impact ionization rate ratio below 0.04 were measured at gains over 1000

Polypremum procumbens L.

https://thekeep.eiu.edu/herbarium_specimens_byname/8066/thumbnail.jp

Polypremum procumbens L.

https://thekeep.eiu.edu/herbarium_specimens_byname/8066/thumbnail.jp