Lifetimes of atoms trapped in an optical lattice in proximity of a surface

We study the lifetime of an atom trapped in an optical vertical lattice in proximity of a massive surface using a complex scaling approach. We analyze how the presence of the surface modifies the known lifetimes of Wannier-Stark states associated to Landau-Zener tunnelling. We also investigate how the existence of a hypothetical short-distance deviation from Newton's gravitational law could affect these lifetimes. Our study is relevant in order to discuss the feasibility of any atomic- interferometry experiment performed near a surface. Finally, the difficulties encountered in applying the complex-scaling approach to the atom-surface Casimir-Polder interaction are addressed.Comment: 10 pages, 8 figure

THE SEPARATION OF CHURCH AND RACE: THE ROLE OF INTENT IN CREATING A RACIALLY INTEGRATED CHURCH

This thesis reviews the role of intent in creating a racially integrated church congregation in the United States. It considers a brief history of the American church’s relationship to race, surveying church involvement in slavery, segregation, and Civil Rights. It reviews the current state of race relations in the church through modern research on church responses to race and integration efforts, and it presents novel research on the factor of church mission in building racial integration in individual congregations. Research consisted of interviewing members of leadership at a successfully integrated church in the northeastern United States. Findings indicate that intent to be racially diverse must be followed by specific actions in various structural aspects of an individual church to be successful

Fluorescence and phosphorescence from individual C60_{60} molecules excited by local electron tunneling

Using the highly localized current of electrons tunneling through a double barrier Scanning Tunneling Microscope (STM) junction, we excite luminescence from a selected C$_{60}$ molecule in the surface layer of fullerene nanocrystals grown on an ultrathin NaCl film on Au(111). In the observed luminescence fluorescence and phosphorescence spectra, pure electronic as well as vibronically induced transitions of an individual C$_{60}$ molecule are identified, leading to unambiguous chemical recognition on the single-molecular scale

Ride of the Waelcyrges : Combating Notions of Feminine Passivity and Monstrous Deviance in Anglo-Saxon Literature

This paper endeavors to trace the Anglo-Saxon literary figure of the waelcyrge through all twelve references to her throughout the Anglo-Saxon corpus, and culminates in an application of the waelcyrge trope to two problematic heroines in Beowulf, Modthryth and Hygd. Given the critical history associated with the waelcyrge, this paper attempts to write against the dominant assumption in Anglo-Saxon scholarship that the waelcyrge is a derivative of the Norse valkyrie. Instead, this paper is predicated on the notion that the waelcyrge represents uniquely Anglo-Saxon values that volley between the cultural shift that occurs in the mid-ninth century through the emergence of the comitatus. Throughout the various analyses of the waelcyrge source material and, also, its application to Beowulf, one sees an emergence of feminine mythological constructs, in which the waelcyrge demonstrates tremendous elasticity. Throughout these texts, we see an amalgamation of the warrior woman motif with supernatural tethering to nature. We also see a symbolic veneration of gynecological and obstetric biological processes, including menstruation, conception, and birth, through the incorporation of warrior and military metaphors. To this end, the waelcyrge emerges as a complex didacticism regarding feminine bodily autonomy, and the various anxieties associated with sexual freedom and repression. This paper concludes with the suggestion that the readings of the Anglo-Saxon woman as relegated to one end of a peaceweaving/monstrous binary need not exist. The waelcyrge demonstrates, throughout her sources, the subjective and elastic fidelity to real-life female experiences. For this reason, the paper concludes with a discussion on Beowulf\u27s problematic heroines. Hygd is frequently interpreted as the ideal-queen, whose peaceweaving passivity ensures the survival of her tribe. Modthryth, conversely, is associated with feminine monstrosity and wanton violence. Examining these women within the context of the waelcyrge illuminates the lack of polarity in these figures, and the way in which both demonstrate political and militaristic cunning that greatly exceeds their male counterparts

Lowell Alexander Francis: Educator, Coach, and Administrator

Transcript of an interview with Lowell Alexander Francis.https://scholars.fhsu.edu/ors/1235/thumbnail.jp

Overexpression of MMPs in Corneas Requiring Penetrating and Deep Anterior Lamellar Keratoplasty.

PurposeMatrix metalloproteinases (MMPs) comprise a family of zinc-dependent endopeptidases involved in wound healing processes, including neovascularization and fibrosis. We assessed MMP protein expression levels in diseased corneas of patients requiring penetrating and deep anterior lamellar keratoplasty. The purpose of this study was to test the hypothesis that upregulation of MMPs in diseased corneas is positively associated with clinical levels of corneal neovascularization and fibrosis.MethodsProtein expression levels of nine individual MMPs were quantified simultaneously in human corneal lysates by using the Bio-Plex Pro Human MMP 9-Plex Panel and the MAGPIX technology. Measurements of MMP1, MMP2, MMP3, MMP7, MMP8, MMP9, MMP10, MMP12, and MMP13 were performed on diseased specimens from 21 patients undergoing corneal transplantation (17 for penetrating keratoplasty and 4 for deep anterior lamellar keratoplasty) and 6 normal control corneas.ResultsLuminex-based expression analysis revealed a significant overexpression of four of the nine MMPs tested (MMP2, MMP8, MMP12, and MMP13) in patient samples compared to control. Significant overexpression of MMP1, MMP2, MMP8, MMP12, and MMP13 was observed in diseased corneas with neovascularization compared with diseased corneas without neovascularization. Overexpression of MMP1, MMP2, MMP8, MMP12, and MMP13 also corresponded with the levels of corneal fibrosis. Finally, reduced expression of MMP3 was detected in keratoconus patients.ConclusionsMultiple MMPs are expressed in the corneas of patients with chronic disease requiring keratoplasty even when the pathologic process appears to be clinically inactive. In particular, the expression of several MMPs (MMP2, MMP8, MMP12, and MMP13) is positively associated with increased levels corneal fibrosis and neovascularization

Red-Sequence Galaxies at High Redshift by the COMBO-17+4 Survey

We investigate the evolution of the galaxy population since redshift 2 with a focus on the colour bimodality and mass density of the red sequence. We obtain precise and reliable photometric redshifts up to z=2 by supplementing the optical survey COMBO-17 with observations in four near-infrared bands on 0.2 square degrees of the COMBO-17 A901-field. Our results are based on an H-band-selected catalogue of 10692 galaxies complete to H=21.7. We measure the rest-frame colour (U_280-V) of each galaxy, which across the redshift range of our interest requires no extrapolation and is robust against moderate redshift errors by staying clear of the 4000A-break. We measure the colour-magnitude relation of the red sequence as a function of lookback time from the peak in a colour error-weighted histogram, and thus trace the galaxy bimodality out to z~1.65. The (U_280-V) of the red sequence is found to evolve almost linearly with lookback time. At high redshift, we find massive galaxies in both the red and the blue population. Red-sequence galaxies with log M_*/M_sun>11 increase in mass density by a factor of ~4 from z~2 to 1 and remain nearly constant at z<1. However, some galaxies as massive as log M_*/M_sun=11.5 are already in place at z~2.Comment: 18 pages, 11 figures, accepted for publication in Ap