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Matter-wave Atomic Gradiometer Interferometric Sensor: Detecting Gravitational Waves with Atom Interferometry
No full textIn 2015, the Laser Interferometer Gravitational-Wave Observatory (LIGO) detected a gravitational wave for the first time, opening up a new and exciting observational frontier for astronomy and cosmology. LIGO is sensitive to gravitational waves in the frequency range of roughly 10 Hz to 1 kHz. The Laser Interferometer Space Antenna (LISA) will build on LIGO’s success by deploying a similar technology in space, and will be sensitive to frequencies from 1 mHz to 50 mHz. This leaves a gap (termed the “midband”) between roughly 50 mHz and 10 Hz that will not be covered by LIGO or LISA. The Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS) collaboration will address this gap by introducing a new type of technology using long-baseline atom interferometry that will be sensitive to gravitational waves in this frequency range. In this paper, we will explain the scientific motivation for detecting gravitational waves and particularly in the mid-band, then look at how atom interferometry works, and how MAGIS will implement an atom interferometer that will be sensitive to gravitational waves in the mid-band frequency range
“Life is a Highway”: Automobility’s Impact on Urban Spaces and Low-Income Communities
No full textAutomobility is a self-reinforcing system promoting private car usage and car dependency. Alternative mobility options, such as public transit, are hampered or nonexistent in an automobility-dominated society. Urban spaces are restructured to prioritize cars, resulting in hostile environments that disproportionately harm young children, older adults, and the disabled. Automobility-dominated spaces negatively affect children’s development and prevent children’s independent mobility. Moreover, automobility has devastated and displaced urban communities for highway construction. Low-income communities are trapped in a cycle of socioeconomic inequality under automobility. Car ownership is financially unsustainable for lower socioeconomic backgrounds, and many are trapped in a cycle of auto debt to retain their mobility. Those without a vehicle suffer from transportation disparity, which can reinforce and worsen poverty’s effects. Sprawling, automobility-dominated spaces reinforce these inequalities, preventing upward economic and intergenerational mobility. Interventions that reclaim space from cars and support pedestrian friendly urban environments can mitigate and counteract these inequalities
Sculpting the Immune Response: Modifying the CAR NK Cell Construct Against the Tumor Microenvironment
No full textWhat Will Happen Tomorrow, and Associated Vulnerabilities
No full textMy work is centered on the feelings of dread I and others have experienced witnessing the effects of rapid ecological change within our short lifetimes. In this work, beaked bug-eaters dance under a tree threatened by a strange disease. They are plush, but threatening, empty costumes, but alive.
I am drawn to handmade papermaking because of the vibrant colors and soft but fibrous texture which–like a sponge–sops up all that comes into contact with it. My past work engages with the power of congregation and parade, climate change, and the feeling of being swept up in a feverish cultural inertia
Exploring Electrochemical Deposition Parameters in Semiconductor Production for Solar Water Splitting
No full textThis research explores the development of p-type semiconductors for photoelectrochemical (PEC) water splitting, focusing on electrochemically deposited thin films composed of iron (Fe), chromium (Cr), and aluminum (Al) oxides. Two deposition methods were tested: one using hydrogen peroxide and another using nitrate reduction. The films were analyzed for their elemental composition and electronic behavior using SEM-EDS and PEC imaging. Results showed that high iron content films exhibited n-type conductivity, while increasing aluminum and chromium concentrations led to mixed n- and p-type properties. These findings provide valuable insights into tuning semiconductor compositions for efficient solar hydrogen production
Such Edifices Are Notoriously Fragile : Reclaiming Female Agency in Margaret Atwood\u27s The Edible Woman and Alias Grace
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Forging Sustainable C-C Bonds: Development of Rhodium-Catalyzed Hydroacylation
No full textCarbon is the fundamental building block of organic compounds, yet sustainable synthetic methods to selectively form bonds between carbon atoms are limited. Fortunately, organometallic compounds are capable of catalytically activating strong carbon-hydrogen bonds, enabling a new class of organic reactions and offering an alternative green strategy for carbon-carbon bond formation. Rh-catalyzed olefin hydroacylation is one such reaction, in which an acyl group and a hydrogen atom are added to opposite sides of an alkene in a 100% atom-economical transformation. Our talk will focus on the Dong group’s creative use of chelating groups to access more complex molecular structures. Among other things, Vy Dong and her collaborators have developed novel methods to generate medium sized rings, natural product precursors, and other compounds with high enantio- and regioselectivity