6,268 research outputs found

    The Legacy of Charles Henry Huber, Class of 1892: A Half Century of Service to Gettysburg College

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    In the common room of Huber Hall, there hangs high on the wall a dingy looking portrait of an older gentleman, dressed in a dark suit with round-framed glasses and graying hair. Beneath this portrait framed in faded gold is a small, tarnished, black plaque that gives a name to this curious looking man and briefly describes some of his accomplishments. From this portrait located above a small television, the Reverend Charles Henry Huber looks out over what used to be the lobby of the Gettysburg Academy, which was housed in a building where he spent much of his professional life; a building that would one day take on his name. Looking out into the common room of what has been transformed into a first year residence hall, “Huber” can see many of the changes that have come to his building and the college where he spent much of his life. Where a grand piano once stood toward the end of his time at the Academy, two rarely used foosball tables now sit; where a brick fireplace once housed its fair share of crackling fires on a snowy day, the metal doors to an elevator now open and close on a daily basis. Students who once crowded around the fireplace to listen to a radio broadcast now crowd around a television to watch new episodes of Grey’s Anatomy and other popular T.V. shows. From his retirement in 1940 to his death in 1951, and for many years after, Huber\u27s portrait has seen many changes to both Huber all and the students who now live there from his portrait on the wall. The story of his half century of service to the college remains the same, although there are few people who could tell even a portion of it today. [excerpt] Course Information: Course Title: HIST 300: Historical Method Academic Term: Spring 2010 Course Instructor: Dr. Michael J. Birkner \u2772 Hidden in Plain Sight is a collection of student papers on objects that are hidden in plain sight around the Gettysburg College campus. Topics range from the Glatfelter Hall gargoyles to the statue of Eisenhower and from historical markers to athletic accomplishments. You can download the paper in pdf format and click View Photo to see the image in greater detail.https://cupola.gettysburg.edu/hiddenpapers/1010/thumbnail.jp

    Telegram from Leadership of Queens Council on the Arts to Geraldine Ferraro

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    Congratulatory telegram from Aida Gonzalez, President, and Jean P. Weiss, Executive Director, of the Queens Council on the Arts to Geraldine Ferraro. Includes two data entry sheets.https://ir.lawnet.fordham.edu/vice_presidential_campaign_correspondence_1984_new_york/1277/thumbnail.jp

    The optical companion to the binary millisecond pulsar J1824-2452H in the globular cluster M28

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    We report on the optical identification of the companion star to the eclipsing millisecond pulsar PSR J1824-2452H in the galactic globular cluster M28 (NGC 6626). This star is at only 0.2" from the nominal position of the pulsar and it shows optical variability (~ 0.25 mag) that nicely correlates with the pulsar orbital period. It is located on the blue side of the cluster main sequence, ~1.5 mag fainter than the turn-off point. The observed light curve shows two distinct and asymmetric minima, suggesting that the companion star is suffering tidal distortion from the pulsar. This discovery increases the number of non-degenerate MSP companions optically identified so far in globular clusters (4 out of 7), suggesting that these systems could be a common outcome of the pulsar recycling process, at least in dense environments where they can be originated by exchange interactions.Comment: accepted for publication on ApJ, 17 pages, 5 figure

    Blue Straggler Stars: The Spectacular Population in M80

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    Using HST-WFPC2 observations in two ultraviolet (UV) filters (F225W and F336W) of the central region of the high density Galactic Globular cluster (GGC) M80 we have identified 305 Blue Straggler Stars (BSS) which represents the largest and most concentrated population of BSS ever observed in a GGC. We also identify the largest, clean sample of evolved BSS yet found. The high stellar density alone cannot explain the BSS, and we suggest that in M80 we are witnessing a transient dynamical state, during which stellar interactions are delaying the core-collapse process leading to an exceptionally large population of collisional-BSS.Comment: 15 pages, 5 figures, Astrophysical Journal Letters, in pres

    Towards the absolute planes: a new calibration of the Bolometric Corrections and Temperature scales for Population II Giants

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    We present new determinations of bolometric corrections and effective temperature scales as a function of infrared and optical colors, using a large database of photometric observations of about 6500 Population II giants in Galactic Globular Clusters (GGCs), covering a wide range in metallicity (-2.0<[Fe/H]<0.0). New relations for BC_K vs (V-K), (J-K) and BC_V vs (B-V), (V-I), (V-J), and new calibrations for T_eff, using both an empirical relation and model atmospheres, are provided. Moreover, an empirical relation to derive the R parameter of the Infrared Flux Method as a function of the stellar temperature is also presented.Comment: 10 pages, 12 .ps figures, MN Latex, accepted by MNRA

    Infrared observations of the candidate double neutron star system PSR J1811-1736

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    PSR J1811-1736 (P=104 ms) is an old (~1.89 Gyrs) binary pulsar (P_orb=18.8 d) in a highly eccentric orbit (e=0.828) with an unidentified companion. Interestingly enough, the pulsar timing solution yields an estimated companion mass 0.93 M_{\odot}<M_C<1.5 M_{\odot}, compatible with that of a neutron star. As such, it is possible that PSR J1811-1736 is a double neutron star (DNS) system, one of the very few discovered so far. This scenario can be investigated through deep optical/infrared (IR) observations. We used J, H, K-band images, obtained as part of the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS), and available in the recent Data Release 9 Plus, to search for its undetected companion of the PSR J1811-1736 binary pulsar. We detected a possible companion star to PSR J1811-1736 within the 3 sigma radio position uncertainty (1.32 arcsec), with magnitudes J=18.61+/-0.07, H=16.65+/-0.03, and K=15.46+/-0.02. The star colours are consistent with either a main sequence (MS) star close to the turn-off or a lower red giant branch (RGB) star, at a pulsar distance of ~5.5 kpc and with a reddening of E(B-V)~4.9. The star mass and radius would be compatible with the constraints on the masses and orbital inclination of the binary system inferred from the mass function and the lack of radio eclipses near superior conjunction. Thus, it is possible that it is the companion to PSR J1811-1736. However, based on the star density in the field, we estimated a quite large chance coincidence probability of ~0.27 between the pulsar and the star, which makes the association unlikely. No other star is detected within the 3 sigma pulsar radio position down to J~20.5, H~19.4$ and K~18.6, which would allow us to rule out a MS companion star earlier than a mid-to-late M spectral type.Comment: 10 pages, 6 figures, accepted for publication on Monthly Notices of the Royal Astronomical Societ

    The giant, horizontal and asymptotic branches of galactic globular clusters. I. The catalog, photometric observables and features

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    A catalog including a set of the most recent Color Magnitude Diagrams (CMDs) is presented for a sample of 61 Galactic Globular Clusters (GGCs). We used this data-base to perform an homogeneous systematic analysis of the evolved sequences (namely, Red Giant Branch (RGB), Horizontal Branch (HB) and Asymptotic Giant Branch (AGB)). Based on this analysis, we present: (1) a new procedure to measure the level of the ZAHB (V_ZAHB) and an homogeneous set of distance moduli obtained adopting the HB as standard candle; (2) an independent estimate for RGB metallicity indicators and new calibrations of these parameters in terms of both spectroscopic ([Fe/H]_CG97) and global metallicity ([M/H], including also the alpha-elements enhancement). The set of equations presented can be used to simultaneously derive a photometric estimate of the metal abundance and the reddening from the morphology and the location of the RGB in the (V,B-V)-CMD. (3) the location of the RGB-Bump (in 47 GGCs) and the AGB-Bump (in 9 GGCs). The dependence of these features on the metallicity is discussed. We find that by using the latest theoretical models and the new metallicity scales the earlier discrepancy between theory and observations (~0.4 mag) completely disappears.Comment: 51 pages, 23 figures, AAS Latex, macro rtrpp4.sty included, accepted by A

    Quantization of a generally covariant gauge system with two super Hamiltonian constraints

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    The Becci-Rouet-Stora-Tyutin (BRST) operator quantization of a finite-dimensional gauge system featuring two quadratic super Hamiltonian and m linear supermomentum constraints is studied as a model for quantizing generally covariant gauge theories. The proposed model ``completely'' mimics the constraint algebra of General Relativity. The Dirac constraint operators are identified by realizing the BRST generator of the system as a Hermitian nilpotent operator, and a physical inner product is introduced to complete a consistent quantization procedure.Comment: 17 pages. Latex file. Minor changes, two references adde

    Non-Markovian dissipative dynamics of two coupled qubits in independent reservoirs: a comparison between exact solutions and master equation approaches

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    The reduced dynamics of two interacting qubits coupled to two independent bosonic baths is investigated. The one-excitation dynamics is derived and compared with that based on the resolution of appropriate non-Markovian master equations. The Nakajima-Zwanzig and the time-convolutionless projection operator techniques are exploited to provide a description of the non-Markovian features of the dynamics of the two-qubits system. The validity of such approximate methods and their range of validity in correspondence to different choices of the parameters describing the system are brought to light.Comment: 6 pages, 3 figures. Submitted to PR

    Dialectical Behavior Therapy application efficacy in the world of an athlete: Addressing special considerations

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    The current project aimed to analyze the potential that Dialectical Behavior Therapy Skills Training (DBT-ST) could have on the student-athlete population. The project necessitated a research exploration of both DBT and sports psychology treatment. This was accomplished by searching Eastern Kentucky University (EKU) Library’s extensive databases, such as Academic Search Complete, PsycINFO, SportDISCUS, and Psycharticles. Considerations are discussed on athlete-specific concerns, such as stigma, athlete cultural views on mental health, eating disorders, coping through injury, and performance anxiety. Current sport psychology interventions are reviewed, and they are compared with the efficacy of DBT treatment literature. Similarities in sport psychology interventions and DBT-ST are drawn on to point future researchers towards studying DBT-ST and its effectiveness in treating athlete concerns. The research discussed is then used to create a framework for an adapted DBT skills training group for athletes
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