Abraham Lincoln : statesman : speech ... in the Senate of the United States, Saturday, February 12, 1927

The pamphlet is inscribed by the author on the cover. A letter to the author from George P. Hambrecht is included at the end of the pamphlet. The letter thanks Smoot for gifting Hambrecht with a copy of the speech.https://scholarsjunction.msstate.edu/fvw-pamphlets/2105/thumbnail.jp

Correspondence with the U. S. Legislature, Smoot, and Sutherland

Papers involving a correspondence with the U.S. Legislature, Smoot, and Sutherland

Simulating Subhalos at High Redshift: Merger Rates, Counts, and Types

Galaxies are believed to be in one-to-one correspondence with simulated dark matter subhalos. We use high-resolution N-body simulations of cosmological volumes to calculate the statistical properties of subhalo (galaxy) major mergers at high redshift (z=0.6-5). We measure the evolution of the galaxy merger rate, finding that it is much shallower than the merger rate of dark matter host halos at z>2.5, but roughly parallels that of halos at z<1.6. We also track the detailed merger histories of individual galaxies and measure the likelihood of multiple mergers per halo or subhalo. We examine satellite merger statistics in detail: 15%-35% of all recently merged galaxies are satellites and satellites are twice as likely as centrals to have had a recent major merger. Finally, we show how the differing evolution of the merger rates of halos and galaxies leads to the evolution of the average satellite occupation per halo, noting that for a fixed halo mass, the satellite halo occupation peaks at z~2.5.Comment: 17 pages, 12 figures, accepted in MNRAS, version matches published on

Constraining Dynamical Dark Energy Models through the Abundance of High-Redshift Supermassive Black Holes

We compute the number density of massive Black Holes (BHs) at the centre of galaxies at z=6 in different Dynamical Dark Energy (DDE) cosmologies, and compare it with existing observational lower limits, to derive constraints on the evolution of the Dark Energy equation of state parameter w. Our approach only assumes the canonical scenario for structure formation from the collapse of overdense regions of the Dark Matter dominated primordial density field on progressively larger scales; the Black Hole accretion and merging rate have been maximized in the computation so as to obtain robust constraints on w and on its look-back time derivative w_a. Our results provide independent constraints complementary to those obtained by combining Supernovae, Cosmic Microwave Background and Baryonic Acoustic Oscillations; while the latter concern combinations of w_0 and w_a leaving the time evolution of the state parameter w_a highly unconstrained, the BH abundance mainly provide upper limits on w_a, only weakly depending on w_0. Combined with the existing constraints, our results significantly restrict the allowed region in DDE parameter space, ruling out DDE models not providing cosmic time and fast growth factor large enough to allow for the building up of the observed abundance of BHs; in particular, models with -1.2 \leq w_0 \leq -1 and positive redshift evolution w_a > 0.8 - completely consistent with previous constraints - are strongly disfavoured by our independent constraints from BH abundance. Such range of parameters corresponds to "Quintom" DDE models, with w crossing -1 starting from larger values.Comment: 19 pages, 6 figures, accepted to MNRA

A Systematic Analysis of Cell Cycle Regulators in Yeast Reveals That Most Factors Act Independently of Cell Size to Control Initiation of Division

Upstream events that trigger initiation of cell division, at a point called START in yeast, determine the overall rates of cell proliferation. The identity and complete sequence of those events remain unknown. Previous studies relied mainly on cell size changes to identify systematically genes required for the timely completion of START. Here, we evaluated panels of non-essential single gene deletion strains for altered DNA content by flow cytometry. This analysis revealed that most gene deletions that altered cell cycle progression did not change cell size. Our results highlight a strong requirement for ribosomal biogenesis and protein synthesis for initiation of cell division. We also identified numerous factors that have not been previously implicated in cell cycle control mechanisms. We found that CBS, which catalyzes the synthesis of cystathionine from serine and homocysteine, advances START in two ways: by promoting cell growth, which requires CBS's catalytic activity, and by a separate function, which does not require CBS's catalytic activity. CBS defects cause disease in humans, and in animals CBS has vital, non-catalytic, unknown roles. Hence, our results may be relevant for human biology. Taken together, these findings significantly expand the range of factors required for the timely initiation of cell division. The systematic identification of non-essential regulators of cell division we describe will be a valuable resource for analysis of cell cycle progression in yeast and other organisms

George Albert Smith correspondence, June 1912]

George Albert Smith correspondence from June of 1912. Includes a letter from Senator Reed Smoot at Washington, D.C.; two letters from brother Winslow Smith at Salt Lake City; three letters from "Mother" [Sarah Farr Smith] at Centerville, Utah; and a letter from cousin Hyrum G. Smith at Salt Lake City, Uta

George Albert Smith correspondence, February 1904 [1]

Miscellaneous correspondence and papers of George A. Smith from February of 1904. Includes a letter from Senator Reed Smoot at Washington, D.C.; a letter from uncle Heber J. Sears at Chicago, Illinois; and correspondence related to Smith's work in the U.S. Land Office at Salt Lake Cit

George Albert Smith correspondence, March 1906 [1]

Miscellaneous correspondence and papers of George A. Smith from March of 1906. Includes a letter from Florence Beatie at Provo, Utah.; a letter from R. S. Callett at Vernal, Utah, regarding irrigation plans in the Uintah Basin; and a letter from Senator Reed Smoot in Washington, D.C