Browsing FAS Scholarly Articles by Title

Now showing items 3093-3112 of 18292

    • Cosmogenic and Nucleogenic 3He in Apatite, Titanite, and Zircon 

      Farley, K. A.; Libarkin, J.; Mukhopadhyay, Sujoy; Amidon, W. (Elsevier, 2006)
      Cosmogenic He-3 was measured in apatite, titanite, and zircon and cosmogenic Ne-21 in quartz at 13 depth intervals in a 2.7-m long drill core in a Miocene ignimbrite from the Altiplano of Bolivia. All three He-3 depth ...

    • Cosmological Constraints from Measurements of Type Ia Supernovae Discovered during the First 1.5 yr of the Pan-STARRS1 Survey 

      Rest, Armin Wolfgang; Scolnic, D.; Foley, R. J.; Huber, M. E.; Chornock, R.; Narayan, Gautham Siddharth; Tonry, J. L.; Berger, Edo; Soderberg, Alicia M.; Stubbs, Christopher William; Riess, A.; Kirshner, Robert P.; Smartt, S. J.; Schlafly, E.; Rodney, S.; Botticella, M. T.; Brout, D.; Challis, P.; Czekala, Ian Philip; Drout, Maria Rebecca; Hudson, M. J.; Kotak, R.; Leibler, C.; Lunnan, Ragnhild; Marion, G. H.; McCrum, M.; Milisavljevic, D.; Pastorello, A.; Sanders, Nathan Edward; Smith, K.; Stafford, E.; Thilker, D.; Valenti, S.; Wood-Vasey, W. M.; Zheng, Z.; Burgett, W. S.; Chambers, K. C.; Denneau, L.; Draper, P. W.; Flewelling, H.; Hodapp, K. W.; Kaiser, N.; Kudritzki, R.-P.; Magnier, E. A.; Metcalfe, N.; Price, P. A.; Sweeney, W.; Wainscoat, R.; Waters, C. (IOP Publishing, 2014)
      We present griz P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric ...

    • Cosmological Constraints from Sunyaev-Zel'dovich-selected Clusters with X-Ray Observations in the First 178 deg2 of the South Pole Telescope Survey 

      Benson, B. A.; de Haan, T.; Dudley, J. P.; Reichardt, C. L.; Aird, K. A.; Andersson, K.; Armstrong, R.; Ashby, Matthew L N; Bautz, M.; Bayliss, Matthew; Bazin, G.; Bleem, L. E.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; Dobbs, M. A.; Foley, R. J.; Forman, William R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Harrington, N.; High, F. W.; Holder, G. P.; Holzapfel, W. L.; Hoover, S.; Hrubes, J. D.; Jones, C.; Joy, M.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-Van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Montroy, T. E.; Murray, S. S.; Natoli, T.; Padin, S.; Plagge, T.; Pryke, C.; Rest, A.; Ruel, Jonathan; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Shaw, L.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stalder, Brian A; Staniszewski, Z.; Stark, Antony A.; Story, K.; Stubbs, Christopher William; Suhada, R.; van Engelen, A.; Vanderlinde, K.; Vieira, J. D.; Viklinin, Alexey A.; Williamson, R.; Zahn, O.; Zenteno, A. (American Astronomical Society, 2013)
      We use measurements from the South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) cluster survey in combination with X-ray measurements to constrain cosmological parameters. We present a statistical method that fits for the ...

    • Cosmological constraints from the SDSS luminous red galaxies 

      Tegmark, Max; Eisenstein, Daniel James; Strauss, Michael A.; Weinberg, David H.; Blanton, Michael R.; Frieman, Joshua A.; Fukugita, Masataka; Gunn, James E.; Hamilton, Andrew J. S.; Knapp, Gillian R.; Nichol, Robert C.; Ostriker, Jeremiah P.; Padmanabhan, Nikhil; Percival, Will J.; Schlegel, David J.; Schneider, Donald P.; Scoccimarro, Roman; Seljak, Uros; Seo, Hee-Jong; Swanson, Molly; Szalay, Alexander S.; Vogeley, Michael S.; Yoo, Jaiyul; Zehavi, Idit; Abazajian, Kevork; Anderson, Scott F.; Annis, James; Bahcall, Neta A.; Bassett, Bruce; Berlind, Andreas; Brinkmann, Jon; Budavari, Tamás; Castander, Francisco; Connolly, Andrew; Csabai, Istvan; Doi, Mamoru; Finkbeiner, Douglas; Gillespie, Bruce; Glazebrook, Karl; Hennessy, Gregory S.; Hogg, David W.; Ivezic, Zeljko; Jain, Bhuvnesh; Johnston, David; Kent, Stephen; Lamb, Donald Q.; Lee, Brian C.; Lin, Huan; Loveday, Jon; Lupton, Robert H.; Munn, Jeffrey A.; Pan, Kaike; Park, Changbom; Peoples, John; Pier, Jeffrey R.; Pope, Adrian; Richmond, Michael; Rockosi, Constance; Scranton, Ryan; Sheth, Ravi K.; Stebbins, Albert; Stoughton, Christopher; Szapudi, István; Tucker, Douglas L.; Berk, Daniel E. Vanden; Yanny, Brian; York, Donald G. (American Physical Society (APS), 2006)
      We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from the Wilkinson ...

    • Cosmological Parameter Estimation Using 21 cm Radiation from the Epoch of Reionization 

      McQuinn, Matthew; Zahn, Oliver; Zaldarriaga, Matias; Hernquist, Lars; Furlanetto, Steven R. (American Astronomical Society, 2006)
      A number of radio interferometers are currently being planned or constructed to observe 21 cm emission from reionization. Not only will such measurements provide a detailed view of that epoch, but, since the 21 cm emission ...

    • Cosmological parameters from SDSS and WMAP 

      Tegmark, Max; Strauss, Michael A.; Blanton, Michael R.; Abazajian, Kevork; Dodelson, Scott; Sandvik, Havard; Wang, Xiaomin; Weinberg, David H.; Zehavi, Idit; Bahcall, Neta A.; Hoyle, Fiona; Schlegel, David; Scoccimarro, Roman; Vogeley, Michael S.; Berlind, Andreas; Budavari, Tamás; Connolly, Andrew; Eisenstein, Daniel James; Finkbeiner, Douglas; Frieman, Joshua A.; Gunn, James E.; Hui, Lam; Jain, Bhuvnesh; Johnston, David; Kent, Stephen; Lin, Huan; Nakajima, Reiko; Nichol, Robert C.; Ostriker, Jeremiah P.; Pope, Adrian; Scranton, Ryan; Seljak, Uroš; Sheth, Ravi K.; Stebbins, Albert; Szalay, Alexander S.; Szapudi, István; Xu, Yongzhong; Annis, James; Brinkmann, J.; Burles, Scott; Castander, Francisco J.; Csabai, Istvan; Loveday, Jon; Doi, Mamoru; Fukugita, Masataka; Gillespie, Bruce; Hennessy, Greg; Hogg, David W.; Ivezic, Zeljko; Knapp, Gillian R.; Lamb, Don Q.; Lee, Brian C.; Lupton, Robert H.; McKay, Timothy A.; Kunszt, Peter; Munn, Jeffrey A.; O’Connell, Liam; Peoples, John; Pier, Jeffrey R.; Richmond, Michael; Rockosi, Constance; Schneider, Donald P.; Stoughton, Christopher; Tucker, Douglas L.; Vanden Berk, Daniel E.; Yanny, Brian; York, Donald G. (American Physical Society (APS), 2004)
      We measure cosmological parameters using the three-dimensional power spectrum P(k) from over 200,000 galaxies in the Sloan Digital Sky Survey (SDSS) in combination with WMAP and other data. Our results are consistent with ...

    • Cosmological Parameters From the Quad Cmb Polarization Experiment 

      Castro, P. G.; Ade, P.; Bock, J.; Bowden, M.; Brown, M. L.; Cahill, G.; Church, S.; Culverhouse, T.; Friedman, R. B.; Ganga, K.; Gear, W. K.; Gupta, S.; Hinderks, J.; Kovac, John M; Lange, A. E.; Leitch, E.; Melhuish, S. J.; Memari, Y.; Murphy, J. A.; Orlando, A.; Pryke, Clement L.; Schwarz, R.; O, C.; Piccirillo, L.; Rajguru, N.; Rusholme, B.; Taylor, A. N.; Thompson, K. L.; Turner, A. H.; Wu, E. Y. S.; Zemcov, M. (IOP Publishing, 2009)
      In this paper, we present a parameter estimation analysis of the polarization and temperature power spectra from the second and third season of observations with the QUaD experiment. QUaD has for the first time detected ...

    • Cosmological Recombination of Lithium and Its Effect on the Microwave Background Anisotropies 

      Stancil, Phillip C.; Loeb, Abraham; Zaldarriaga, Matias; Dalgarno, Alexander; Lepp, Stephen (IOP Publishing, 2002)
      The cosmological recombination history of lithium, produced during big bang nucleosynthesis, is presented using updated chemistry and cosmological parameters consistent with recent cosmic microwave background (CMB) ...

    • Cosmological Results from High‐ z Supernovae 

      Tonry, John L.; Schmidt, Brian P.; Barris, Brian; Candia, Pablo; Challis, Peter; Clocchiatti, Alejandro; Coil, Alison L.; Filippenko, Alexei V.; Garnavich, Peter; Hogan, Craig; Holland, Stephen T.; Jha, Saurabh; Kirshner, Robert P.; Krisciunas, Kevin; Leibundgut, Bruno; Li, Weidong; Matheson, Thomas; Phillips, Mark M.; Riess, Adam G.; Schommer, Robert; Smith, R. Chris; Sollerman, Jesper; Spyromilio, Jason; Stubbs, Christopher W.; Suntzeff, Nicholas B. (American Astronomical Society, 2003)

    • Cosmological smoothed particle hydrodynamics simulations: a hybrid multiphase model for star formation 

      Springel, V.; Hernquist, L. (Oxford University Press, 2003)
      We present a model for star formation and supernova feedback that describes the multiphase structure of star-forming gas on scales that are typically not resolved in cosmological simulations. Our approach includes radiative ...

    • Cosmological smoothed particle hydrodynamics simulations: the entropy equation 

      Springel, V.; Hernquist, L. (Oxford University Press, 2002)
      We discuss differences in simulation results that arise between the use of either the thermal energy or the entropy as an independent variable in smoothed particle hydrodynamics (SPH). In this context, we derive a new ...

    • Cosmology With Contaminated Samples: Methods of Measuring Dark Energy With Photometrically Classified Pan-Starrs Supernovae 

      Berger, Edo; Jones, D.O.; Scolnic, D.M.; Riess, A.G.; Kessler, R.; Kirshner, Robert P.; Ortega, C.A.; Foley, R.J.; Chornock, R.; Challis, Peter M.; Burgett, W.S.; Chambers, K.C.; Draper, P.W.; Flewelling, H.; Huber, M.E.; Kaiser, N.; Kudritzki, R.-P.; Metcalfe, N.; Wainscoat, R.J.; Waters, C. (2016)
      The Pan-STARRS (PS1) Medium Deep Survey discovered over 5,000 likely supernovae (SNe) but obtained spectral classifications for just 10% of its SN candidates. We measured spectroscopic host galaxy redshifts for 3,073 of ...

    • Cosmopolitan: A Tale of Identity from Ottoman Alexandria 

      Jasanoff, Maya (Duke University Press, 2005)

    • COSMOS: Python library for massively parallel workflows 

      Gafni, Erik; Luquette, Lovelace J.; Lancaster, Alex K.; Hawkins, Jared B.; Jung, Jae-Yoon; Souilmi, Yassine; Wall, Dennis P.; Tonellato, Peter J. (Oxford University Press, 2014)
      Summary: Efficient workflows to shepherd clinically generated genomic data through the multiple stages of a next-generation sequencing pipeline are of critical importance in translational biomedical science. Here we present ...

    • Cost Analysis of Stratospheric Albedo Modification Delivery Systems 

      McClellan, Justin; Keith, David; Apt, Jay (IOP Publishing, 2012)
      We perform engineering cost analyses of systems capable of delivering 1–5 million metric tonnes (Mt) of albedo modification material to altitudes of 18–30 km. The goal is to compare a range of delivery systems evaluated ...

    • The Cost of Gene Expression Underlies a Fitness Trade-Off in Yeast 

      Lang, Gregory I.; Murray, Andrew W.; Botstein, David (National Academy of Sciences, 2009)
      Natural selection optimizes an organism's genotype within the context of its environment. Adaptations to one environment can decrease fitness in another, revealing evolutionary trade-offs. Here, we show that the cost of ...

    • The Cost of Workplace Flexibility for High-Powered Professionals 

      Goldin, Claudia D.; Katz, Lawrence F. (SAGE Publications, 2011)
      The authors study the pecuniary penalties for family-related amenities in the workplace (e.g., job interruptions, short hours, part-time work, and flexibility during the workday), how women have responded to them, and how ...

    • Cost-Benefit Arbitration Between Multiple Reinforcement-Learning Systems 

      Kool, Wouter; Gershman, Samuel; Cushman, Fiery (SAGE Publications, 2017-07-21)
      Human behavior is sometimes determined by habit and other times by goal-directed planning. Modern reinforcement-learning theories formalize this distinction as a competition between a computationally cheap but inaccurate ...

    • A Cost-Space Approach to Distributed Query Optimization in Stream Based Overlays 

      Shneidman, Jeffrey; Pietzuch, Peter; Welsh, Matt; Seltzer, Margo; Roussopoulos, Mema (IEEE Computer Society, 2005)
      Distributed stream-based applications, such as continuous query systems, have network scale and time characteristics that challenge traditional distributed query optimization. The optimization sub-problems of plan generation ...

    • Costly Information Acquisition: Experimental Analysis of a Boundedly Rational Model 

      Gabaix, Xavier; Laibson, David; Moloche, Guillermo; Weinberg, Stephen (American Economic Association, 2006-09-01)
      The directed cognition model assumes that agents use partially myopic option-value calculations to select their next cognitive operation. The current paper tests this model by studying information acquisition in two ...