Browsing FAS Scholarly Articles by Title

Now showing items 1-20 of 18172

    • The 0-brane Action in a General D = 4 Supergravity Background 

      Billo, Marco; Cacciatori, Sergio; Denef, Frederik; Fre, Pietro; Van Proeyen, Antoine; Proeyen, Antoine Van; Zanon, Daniela (Institute of Physics Publishing, 1999)
      We begin by presenting the superparticle action in the background of N=2, D=4 supergravity coupled to n vector multiplets interacting via an arbitrary special Kahler geometry. Our construction is based on implementing ...

    • 1 / f α noise and generalized diffusion in random Heisenberg spin systems 

      Agarwal, Kartiek; Demler, Eugene; Martin, Ivar (American Physical Society, 2015)
      We study the "flux-noise" spectrum of random-bond quantum Heisenberg spin systems using a real-space renormalization group (RSRG) procedure that accounts for both the renormalization of the system Hamiltonian and of a ...

    • A +1 ribosomal frameshifting motif prevalent among plant amalgaviruses 

      Nibert, Max L.; Pyle, Jesse D.; Firth, Andrew E. (Academic Press, 2016)
      Sequence accessions attributable to novel plant amalgaviruses have been found in the Transcriptome Shotgun Assembly database. Sixteen accessions, derived from 12 different plant species, appear to encompass the complete ...

    • The 1-by-3 Tandem Differential Mobility Analyzer for Measurement of the Irreversibility of the Hygroscopic Growth Factor 

      Rosenoern, T.; Paulsen, D.; Martin, Scot (Taylor & Francis Ltd, 2009)
      A new instrument, namely the 1 × 3 tandem differential mobility analyzer (1 × 3-TDMA), has been developed. Its primary measurement is the irreversibility of the hygroscopic growth factor of aerosol particles. The instrument ...

    • 1.3 mm Wavelength VLBI of Sagittarius A*: Detection of Time-Variable Emission on Event Horizon Scales 

      Fish, Vincent L.; Doeleman, Sheperd Samuel; Beaudoin, Christopher; Blundell, Raymond; Bolin, David E.; Bower, Geoffrey C.; Chamberlin, Richard; Freund, Robert; Friberg, Per; Gurwell, Mark Andrew; Honma, Mareki; Inoue, Makoto; Krichbaum, Thomas P.; Lamb, James; Marrone, Daniel P.; Moran, James M.; Oyama, Tomoaki; Plambeck, Richard; Primiani, Rurik A.; Rogers, Alan E. E.; Smythe, Daniel L.; SooHoo, Jason; Strittmatter, Peter; Tilanus, Remo P. J.; Titus, Michael; Weintroub, Jonathan; Wright, Melvyn; Woody, David; Young, Ken Harbour; Ziurys, Lucy M. (IOP Publishing, 2011)
      Sagittarius A*, the ~4 × 106 M ☉ black hole candidate at the Galactic center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength very long baseline interferometry (VLBI). We report on 1.3 mm ...

    • A 1.9 Earth Radius Rocky Planet and the Discovery of a Non-Transiting Planet in the Kepler-20 System 

      Buchhave, Lars A.; Dressing, Courtney D.; Dumusque, Xavier; Rice, Ken; Vanderburg, Andrew Michael; Mortier, Annelies; Lopez-Morales, Mercedes; Lopez, Eric; Lundkvist, Mia S.; Kjeldsen, Hans; Affer, Laura; Bonomo, Aldo S.; Charbonneau, David; Cameron, Andrew Collier; Cosentino, Rosario; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Haywood, Raphaelle D.; Johnson, John Asher; Latham, David Winslow; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Motalebi, Fatemeh; Nascimbeni, Valerio; Pepe, Francesco; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Sasselov, Dimitar D.; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (American Astronomical Society, 2016)
      Kepler-20 is a solar-type star (V = 12.5) hosting a compact system of five transiting planets, all packed within the orbital distance of Mercury in our own solar system. A transition from rocky to gaseous planets with a ...

    • The 10kTrees Website: A New Online Resource for Primate Phylogeny 

      Arnold, Christian; Matthews, Luke J.; Nunn, Charles Lindsay (John Wiley & Sons, 2010)
      The comparative method plays a central role in efforts to uncover the adaptive basis for primate behaviors, morphological traits, and cognitive abilities.[1-4] The comparative method has been used, for example, to infer ...

    • 11CO2 Fixation: A Renaissance in PET Radiochemistry 

      Rotstein, Benjamin H; Liang, Steven; Holland, Jason P; Collier, Thomas L; Hooker, Jacob M; Wilson, Alan A.; Vasdev, Neil (Royal Society of Chemistry, 2013)
      Carbon-11 labelled carbon dioxide is the cyclotron-generated feedstock reagent for most positron emission tomography (PET) tracers using this radionuclide. Most carbon-11 labels, however, are installed using derivative ...

    • 14-3-3 proteins regulate Tctp–Rheb interaction for organ growth in Drosophila 

      Le, Thao Phuong; Vuong, Linh Thuong; Kim, Ah-Ram; Hsu, Ya-Chieh; Choi, Kwang-Wook (Nature Publishing Group, 2016)
      14-3-3 family proteins regulate multiple signalling pathways. Understanding biological functions of 14-3-3 proteins has been limited by the functional redundancy of conserved isotypes. Here we provide evidence that 14-3-3 ...

    • 16S rRNA Phylogenetic Investigation of the Candidate Division "Korarchaeota" 

      Auchtung, T. A.; Takacs-Vesbach, C. D.; Cavanaugh, Colleen Marie (American Society for Microbiology, 2006)
      The environmental distribution and phylogeny of “Korarchaeota,” a proposed ancient archaeal division, was investigated by using the 16S rRNA gene framework. Korarchaeota-specific primers were designed based on previously ...

    • 17-beta-Estradiol in relation to age at menarche and adult obesity in premenopausal women 

      Hjartaker, Anette; Ballard-Barbash, Rachel; Veierød, Marti B.; Emaus, Aina; Ellison, Peter; Thune, Inger; Furberg, Anne-Sofie; Espetvedt, Sissi; Jasienska, Grazyna (Oxford University Press, 2007)
      BACKGROUND: We hypothesize that premenopausal endogenous estradiol may be associated with age at menarche and adult overweight and obesity, potentially contributing to breast cancer risk. METHODS: We assessed age at menarche ...

    • 17β-Estradiol Levels During An Entire Menstrual Cycle In Response To Adult Stature and Insulin, Of Possible Importance For Breast Cancer Risk: The EBBA-I study. 

      Espetvedt, Sissi E.; Emaus, Aina; Tretli, Steinar; Jasienska, Grazyna; Ellison, Peter; Furberg, Anne-Sofie; Wist, Erik; Thune, Inger (American Association for Cancer Research, 2009)
      Background: The normal breast cells develop into malignant cells as a result of a complex interplay between genetic, environmental, nutritional and hormonal factors. Attained adult stature and insulin levels, risk factors ...

    • The 2.1-D Sketch 

      Nitzberg, Mark; Mumford, David Bryant (IEEE Computer Society Press, 1990)
      A model is described for image segmentation that tries to capture the low-level depth reconstruction exhibited in early human vision, giving an important role to edge terminations. The problem is to find a decomposition ...

    • A >200 meV Uphill Thermodynamic Landscape for Radical Transport in Escherichia coli Ribonucleotide Reductase Determined Using Fluorotyrosine-Substituted Enzymes 

      Ravichandran, Kanchana R.; Taguchi, Alexander T.; Wei, Yifeng; Tommos, Cecilia; Nocera, Daniel G.; Stubbe, JoAnne (American Chemical Society, 2016)
      Escherichia coli class Ia ribonucleotide reductase (RNR) converts ribonucleotides to deoxynucleotides. A diferric-tyrosyl radical (Y122•) in one subunit (β2) generates a transient thiyl radical in another subunit (α2) via ...

    • A 200-Million-Year Delay in Permanent Atmospheric Oxygenation 

      Poulton, Simon; Bekker, Andrey; Cumming, Vivien; Zerkle, Aubrey L.; Canfield, Donald E.; Johnston, David (Springer Science and Business Media LLC, 2021-03-29)
      The rise of atmospheric oxygen fundamentally changed the chemistry of surficial environments and the nature of Earth’s habitability1. Early atmospheric oxygenation occurred over a protracted period of extreme climatic ...

    • The 2006 Economic Report of the President 

      Feldstein, Martin (American Economic Association, 2006)
      This paper is an analytic comment on two chapters of the Economic Report of the President for 2006. Chapter One deals with the economy in 2005 and the outlook for the future. The chapter provides a detailed analysis of the ...

    • 2015 Mark Sacks Lecture Williams, History, and ‘the Impurity of Philosophy’ 

      Moran, Richard A. (Wiley-Blackwell, 2016)

    • The 2016 Josephine Waters Bennett Lecture: Humanism and Printing in the Work of Conrad Gessner 

      Blair, Ann (Cambridge University Press (CUP), 2017)
      I discuss how printing affected the practice of scholarship by examining the working methods of Conrad Gessner (1516–65), a prolific humanist, bibliographer, and natural historian. Gessner supplemented his revenue as city ...

    • 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts 

      Zaldarriaga, Matias; Furlanetto, Steven R.; Hernquist, Lars (American Astronomical Society, 2004)
      The relatively large Thomson optical depth, tau(es), inferred recently from the WMAP observations suggests that the universe was reionized in a more complex manner than previously believed. However, the value Of T,, provides ...

    • 23 GHz VLBI Observations of SN 2008ax 

      Marti-Vidal, I.; Alberdi, A.; Ros, E.; Shapiro, Irwin Ira; Beswick, R.J.; Pedlar, A.; Immler, S.; Panagia, N.; Van Dyk, S.; Marcaide, J. M.; Guirado, J. C.; Perrez-Torres, M. A.; Muxlow, T. W. B.; Argo, M. K.; Stockdale, C. J.; Sramek, R. A.; Weiler, K. W. (EDP Sciences, 2009)
      We report on phase-referenced 23 GHz Very-Long-Baseline-Interferometry (VLBI) observations of the type IIb supernova SN 2008ax, made with the Very Long Baseline Array (VLBA) on 2 April 2008 (33 days after explosion). These ...