Now showing items 6036-6055 of 18256

    • Force-free electrodynamics around extreme Kerr black holes 

      Lupsasca, Alexandru Victor; Rodriguez, Maria; Strominger, Andrew E. (Springer Science + Business Media, 2014)
      Plasma-filled magnetospheres can extract energy from a spinning black hole and provide the power source for a variety of observed astrophysical phenomena. These magnetospheres are described by the highly nonlinear equations ...
    • Forced Axial Flow Between Rotating Concentric Cylinders 

      Barcilon, Victor; Berg, Howard Curtis (Cambridge University Press (CUP), 1971)
      Forced axial flow in an annular gap of a cylindrical rotor is investigated analytically and experimentally. At small rotation rates and narrow gap widths, the axial flow is a simple Poiseuille flow over most of the rotor. ...
    • Forced Rayleigh Scattering from Lipid-Water Smectic Phases 

      Chan, Winston; Pershan, Peter S. (American Physical Society, 1977)
      The hydrodynamic relaxation rate for water inhomogeneities in aligned lipid-water smectics is measured for the first time using an improved version of the "forced Rayleigh" technique. Variation of the relaxation rate with ...
    • Forced Sales and House Prices 

      Campbell, John Y.; Giglio, Stefano; Pathak, Parag (American Economic Association, 2011)
      This paper uses data on all house transactions in Massachusetts over the last 20 years to show that houses sold after foreclosure, or close in time to the death or bankruptcy of a seller, are sold at lower prices than other ...
    • Forced Tearing of Ductile and Brittle Thin Sheets 

      Tallinen, T.; Mahadevan, L. (American Physical Society, 2011)
      Tearing a thin sheet by forcing a rigid object through it leads to complex crack morphologies; a single oscillatory crack arises when a tool is driven laterally through a brittle sheet, while two diverging cracks and a ...
    • The Forces from Coupled Surface Plasmon Polaritons in Planar Waveguides 

      Woolf, David Nathaniel; Loncar, Marko; Capasso, Federico (Optical Society of America, 2009)
    • Forecasting and Backcasting: Predicting the Impact of Events on the Future 

      Ebert, Jane E. J.; Gilbert, Daniel Todd; Wilson, Timothy D. (University of Chicago Press, 2009)
      In many choices they make—-for example, choosing between a movie and a play or deciding whether to attend a sports game shortly before a birthday party—-consumers are guided by how they expect an event will make them feel. ...
    • Forecasting in dynamic factor models subject to structural instability 

      Stock, James H.; Watson, Mark W. (Oxford University Press, 2009)
      This chapter assesses forecasts constructed using dynamic factor models for their reliability in the face of structural breaks. Dynamic factor models have had notable empirical forecasting successes, but there has been ...
    • Forecasting the Effects of Obesity and Smoking on U.S. Life Expectancy 

      Stewart, Susan T.; Cutler, David M.; Rosen, Allison B. (Massachusetts Medical Society, 2009)
      Background: While increases in obesity over the past 30 years have adversely affected population health, there have been concomitant improvements due to reductions in smoking. Better understanding of the joint effects of ...
    • Foregrounds in Wide-field Redshifted 21 Cm Power Spectra 

      Thyagarajan, Nithyanandan; Jacobs, Daniel C.; Bowman, Judd D.; Barry, N.; Beardsley, A. P.; Bernardi, G.; Briggs, F.; Cappallo, R. J.; Carroll, P.; Corey, B. E.; Oliveira-Costa, A. de; Dillon, Joshua S.; Emrich, D.; Ewall-Wice, A.; Feng, L.; Goeke, R.; Greenhill, L. J.; Hazelton, B. J.; Hewitt, J. N.; Hurley-Walker, N.; Johnston-Hollitt, M.; Kaplan, D. L.; Kasper, J. C.; Kim, Han-Seek; Kittiwisit, P.; Kratzenberg, E.; Lenc, E.; Line, J.; Loeb, A.; Lonsdale, C. J.; Lynch, M. J.; McKinley, B.; McWhirter, S. R.; Mitchell, D. A.; Morales, M. F.; Morgan, E.; Neben, A. R.; Oberoi, D.; Offringa, A. R.; Ord, S. M.; Paul, Sourabh; Pindor, B.; Pober, J. C.; Prabu, T.; Procopio, P.; Riding, J.; Rogers, A. E. E.; Roshi, A.; Shankar, N. Udaya; Sethi, Shiv K.; Srivani, K. S.; Subrahmanyan, R.; Sullivan, I. S.; Tegmark, M.; Tingay, S. J.; Trott, C. M.; Waterson, M.; Wayth, R. B.; Webster, R. L.; Whitney, A. R.; Williams, A.; Williams, C. L.; Wu, C.; Wyithe, J. S. B. (American Astronomical Society, 2015)
      Detection of 21 cm emission of H I from the epoch of reionization, at redshifts z > 6, is limited primarily by foreground emission. We investigate the signatures of wide-field measurements and an all-sky foreground model ...
    • Foreign Currency for Long-Term Investors 

      Campbell, John; Viceira, Luis; White, Joshua (Blackwell Publishing, 2003)
      Conventional wisdom holds that conservative investors should avoid exposure to foreign currency risk. Even if they hold foreign equities, they should hedge the currency exposure of these positions and hold only domestic ...
    • Foreign Encounters and Informal Diplomacy in Early Modern Japan 

      Howell, David L (Johns Hopkins University Press, 2014)
      The apparent inevitability of Tokugawa Japan’s opening to the West in 1854 has naturalized the story of how a series of overtures from the late eighteenth century onward culminated in Commodore Matthew Perry’s successful ...
    • Foreign Influence and Welfare 

      Antras, Pol; Padro i Miquel, Gerard (National Bureau of Economic Research Inc., 2009)
      How do foreign interests influence the policy determination process? What are the welfare implications of such foreign influence? In this paper we develop a model of foreign influence and apply it to the study of optimal ...
    • Foreign language originals and full quotations cited in Too Much To Know: Managing Scholarly Information Before the Modern Age. 

      Blair, Ann M. (2010)
      Footnote numbers and bibliographical references are keyed to the book Too Much To Know: Managing Scholarly Information Before the Modern Age. Spelling, punctuation and italics are original. In case of discrepancy, the ...
    • Foreign Trade and Investment: Firm-level Perspectives 

      Helpman, Elhanan (Wiley-Blackwell, 2013)
      This Economica Coase Lecture reviews research that has revolutionized the field of international trade and foreign direct investment. It explains the motivation behind the development of new analytical frameworks, the ...
    • Forelimb-Hindlimb Developmental Timing Changes across Tetrapod Phylogeny 

      Bininda-Emonds, Olaf RP; Jeffery, Jonathan E; Sánchez-Villagra, Marcelo R; Colbert, Matthew; Pieau, Claude; Selwood, Lynne; ten Cate, Carel; Raynaud, Albert; Osabutey, Casmile K; Hanken, James; Richardson, Michael K. (BioMed Central, 2007)
      Background: Tetrapods exhibit great diversity in limb structures among species and also between forelimbs and hindlimbs within species, diversity which frequently correlates with locomotor modes and life history. We aim ...
    • Foreseeing the Endgame: Who Are the Students Who Take the Final Exam at the Beginning of a MOOC? 

      Chen, Chen; Sonnert, Gerhard; Sadler, Philip; Malan, David (Informa UK Limited, 2020-01-06)
      Massive open online courses (MOOCs) show highly irregular participation behaviour among users. In this study, using data from Computer Science 50x of HarvardX, we investigated one extreme, yet common strategy to foresee ...
    • Forest ecosystem changes from annual methane source to sink depending on late summer water balance 

      Shoemaker, Julie K.; Keenan, Trevor; Hollinger, David Y.; Richardson, Andrew (Wiley-Blackwell, 2014)
      Forests dominate the global carbon cycle, but their role in methane (CH4) biogeochemistry remains uncertain. We analyzed whole-ecosystem CH4 fluxes from 2 years, obtained over a lowland evergreen forest in Maine, USA. Gross ...
    • Forest Response to Catastrophic Wind: Results from an Experimental Hurricane 

      Cooper-Ellis, Sarah; Foster, David Russell; Carlton, Gary; Lezberg, Ann (Wiley-Blackwell, 1999)
      Infrequent, intense wind disturbance is an important factor in northeastern U.S. forests, yet little is known about the early stages of vegetation reorganization, or the processes that facilitate biotic regulation of ...
    • Forest Response to Chronic Hurricane Disturbance in Coastal New England 

      Busby, Posy E.; Canham, Charles D.; Motzkin, Glen; Foster, David Russell (Opulus Press, 2009)
      Question: Hurricanes and cyclones cause a wide range of damage to coastal forests worldwide. Most of these storms are not catastrophic in ecological terms, but forest responses to storms of moderate intensities are poorly ...