2,891 research outputs found
Physics lab with professor Essick, ca. 1995
No full texthttps://rdc.reed.edu/v1/resources/6912d733-43e9-49ec-ab27-4579ffd6c68a/thumb/128.jpgPhysics professor John Essick and a student in the physics lab working with lazer equipment, ca. 1995
Nonparametric extensions of nuclear equations of state: probing the breakdown scale of relativistic mean-field theory
No full textPhenomenological calculations of the properties of dense matter, such as relativistic mean-field theories, represent a pathway to predicting the microscopic and macroscopic properties of neutron stars. However, such theories do not generically have well-controlled uncertainties and may break down within neutron stars. To faithfully represent the uncertainty in this breakdown scale, we develop a hybrid representation of the dense-matter equation of state, which assumes the form of a relativistic mean-field theory at low densities, while remaining agnostic to any nuclear theory at high densities. To achieve this, we use a nonparametric equation of state model to incorporate the correlations of the underlying relativistic mean-field theory equation of state at low pressures and transition to more flexible correlations above some chosen pressure scale. We perform astrophysical inference under various choices of the transition pressure between the theory-informed and theory-agnostic models. We further study whether the chosen relativistic mean-field theory breaks down above some particular pressure and find no such evidence. Using simulated data for future astrophysical observations at about two-to-three times the precision of current constraints, we show that our method can identify the breakdown pressure associated with a potential strong phase transition
Featured Speaker: Dwayne Reed
No full textDwayne Reed is an educator, speaker, author, and rapper. Catapulted by his blockbuster video Welcome to the Fourth Grade, Mr. Reed has been featured on Good Morning America, World News Tonight, BBC News, The Jimmy Kimmel Live Show, and in The Washington Post and Time Magazine. Mr. Reed, an EIU graduate, will share about his teaching journey to guide you on yours
The Meissner Effect and Critical Current Density in Fabricated YBCO Cylindrical Superconductors
No full texthttps://rdc.reed.edu/v1/resources/a3f3a17e-729a-4e34-998b-f682d557f77e/thumb/128.jpgYttrium barium copper oxide (YBCO) high-temperature superconductor samples were prepared at Reed and subjected to a Meissner Effect experiment in order to estimate the maximum sustainable critical current of each sample. The experiment not only provided information on the consistency of the manufacturing method in producing dimensionally similar conductors, but also provided insight into the prevalence of 211 nonsuperconducting inclusions in the samples. Fairly consistent critical current values were found amongst like pellets, with an average of 2.1 · 10^7 A/m^2 with standard deviation of 0.4 · 10^7 A/m^2. These values are comparable in magnitude to those found in similar experiments and may suggest a defect composition of around 14% 211 inclusions, although much further work would need to be performed to confirm the accuracy of this value
Jere Nash Interview with Jack Reed
No full textInterview conducted by author Jere Nash with Tupelo businessman Jack Reed in the process of writing Mississippi Politics: The Struggle for Power, 1976-2006. Reed chaired a special education study commission in 1980 and ran as a Republican candidate in the 1987 gubernatorial race. Topics covered include William Winter; education; Tupelo, Mississippi; George McLean; School integration; Mississippi Economic Council; civil rights; Bill Allain; special education study commission; highway program; Reed running for governor in 1987; Republican Party; efforts to recruit Reed to run for governor again in 1991; Kirk Fordice; Roger Wicker; and current work on education
... Reed hazing report
No full textBegan with 2020.Submitted to the Legislative Assembly as required by ORS 350.259.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
ORBITAL DECAY OF HOT JUPITERS DUE TO NONLINEAR TIDAL DISSIPATION WITHIN SOLAR-TYPE HOSTS
No full textWe study the orbital evolution of hot Jupiters due to the excitation and damping of tidally driven g-modes within solar-type host stars. Linearly resonant g-modes (the dynamical tide) are driven to such large amplitudes in the stellar core that they excite a sea of other g-modes through weakly nonlinear interactions. By solving the dynamics of large networks of nonlinearly coupled modes, we show that the nonlinear dissipation rate of the dynamical tide is several orders of magnitude larger than the linear dissipation rate. We find stellar tidal quality factors Q[' over *] ≃ 10[superscript 5]–10[superscript 6] for systems with planet mass M[subscript p] ≳ 0.5M[subscript J] and orbital period P ≲ 2\;\mathrm{days},$ which implies that such systems decay on timescales that are small compared to the main-sequence lifetime of their solar-type hosts. According to our results, there are ≃ 10 currently known exoplanetary systems, including WASP-19b and HAT-P-36-b, with orbital decay timescales shorter than a Gyr. Rapid, tidally induced orbital decay may explain the observed paucity of planets with M[subscript p] ≳ M[subscript J] and P < 2 days around solar-type hosts and could generate detectable transit-timing variations in the near future.National Science Foundation (U.S.) (Laser Interferometer Gravitational-Wave Observatory PHY-0757058)United States. National Aeronautics and Space Administration (NNX14AB40G
Reading: Ishmael Reed
No full textIn this audiovisual recording from Thursday, March 20, 1975, as part of the 6th Annual UND Writers Conference: “Spirit of Place,” Ishmael Reed reads a selection of poems and an excerpt from Flight to Canada. The poems Reed reads include “Feral Pioneers,” “There\u27s a Whale in my Thigh,” “I am a Cowboy in the Boat of Ra,” “Betty\u27s Ball Blues,” “Monsters From the Ozarks,” “Beware: Do Not Read This Poem,” “Dualism,” “The Difference Between My Heart & Your Intellect,” “[In San Francisco They are Taking Up a Collection],” “Caledonia,” “Sky Diving,” “\u27Sputin,” “Untitled,” “Return of Julian the Apostle to Rome,” “Sky Diving Part Two,” “If I Had a Nickel,” “The Author Reflects on His 35th Birthday,” “Mystery First Lady,” “Jacket Notes,” and “Skirt Dance.
History professor John Tomsich retires from Reed. By Edward Segel.
No full texthttps://rdc.reed.edu/v1/resources/42169571-3507-4dd0-bb53-b5b5b9cbd82f/thumb/128.jpgNote on the retirement of John Tomsich, at Reed from 1962 and author of an American history classic, A Genteel Endeavor. Tomsich, an admired lecturer in Humanities 210 and 220, expanded his interests into the history of science and technology
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