Now showing items 820-839 of 18256

    • Archean Microfossils Showing Cell Division from the Swaziland System of South Africa 

      Knoll, Andrew; Barghoorn, Elso S. (American Association for the Advancement of Science, 1977)
      A newly discovered population of organic walled microstructures from the Swaziland System, South Africa, is considered to be biological on the following grounds: (i) the structures are carbonaceous and occasionally have ...
    • Archean Photoautotrophy: Some Alternatives and Limits 

      Knoll, Andrew (Springer, 1979)
      From the Archean geological record, one can infer that photoautotrophy evolved early in earth history; however, the nature of this photosynthesis - whether it was predominantly bacterial or cyanobacterlal - is tess clearly ...
    • An Architecture A Day Keeps The Hacker Away 

      Holland, David; Lim, Ada T.; Seltzer, Margo (Association for Computing Machinery, 2005)
      System security as it is practiced today is a losing battle. In this paper, we outline a possible comprehensive solution for binary-based attacks, using virtual machines, machine descriptions, and randomization to achieve ...
    • Architecture and Function of Mechanosensitive Membrane Protein Lattices 

      Kahraman, Osman; Koch, Peter D.; Klug, William S.; Haselwandter, Christoph A. (Nature Publishing Group, 2016)
      Experiments have revealed that membrane proteins can form two-dimensional clusters with regular translational and orientational protein arrangements, which may allow cells to modulate protein function. However, the physical ...
    • The Architecture and Pottery of a Late 3rd Millennium BC Residential Quarter at Tell Hamoukar, Northeastern Syria 

      Colantoni, Carlo; Ur, Jason Alik (British Institute for the Study of Iraq, 2011)
      The 2001 excavations in Area H on Hamoukar’s lower town produced a wealth of information on a residential neighbourhood of a late third-millennium BC city. The excavations were intended to address several issues, including ...
    • The Architecture of Inclusion: Evidence from Corporate Diversity Programs 

      Dobbin, Frank; Kalev, Alexandra (Harvard University, Harvard Law School, 2007)
    • Architectures for Real-Time Volume Rendering 

      Pfister, Hanspeter (Elsevier, 1999)
      Over the last decade, volume rendering has become an invaluable visualization technique for a wide variety of applications. This paper reviews three special-purpose architectures for interactive volume rendering: texture ...
    • Archival Values: Essays in Honor of Mark A. Greene 

      Hyry, Thomas (Society of American Archivists, 2019-09)
      Book review of Archival Values: Essays in Honor of Mark Greene
    • The Archives of Universal History 

      Rothschild, Emma (University of Hawai'i Press, 2008)
      This article looks at early proposals for an international archive, at the different respects in which archives are international or transnational, and at the development since 1946 of the archives of international ...
    • Archivos de conocimiento y la cultura legal de la publicidad en la Marsella medieval 

      Smail, Daniel (Editorial CSIC, 1997)
      Based on a case study of Marseille in the fourteenth century, this article argues that a foundational metaphor of medieval legal culture was publicity, even in the late medieval world where the written norms of Roman law ...
    • Arctic Air Pollution: New Insights from POLARCAT-IPY 

      Law, Kathy S.; Stohl, Andreas; Quinn, Patricia K.; Brock, Charles; Burkhart, John; Paris, Jean-Daniel; Ancellet, Gerard; Singh, Hanwant B.; Roiger, Anke; Schlager, Hans; Dibb, Jack; Jacob, Daniel James; Arnold, Steve R.; Pelon, Jacques; Thomas, Jennie L. (American Meteorological Society, 2014)
      Given the rapid nature of climate change occurring in the Arctic and the difficulty for climate models to quantitatively reproduce observed changes such as sea ice loss, it is important to improve understanding of the ...
    • The Arctic Boundary Layer Expedition (ABLE 3A): July–August 1988 

      Harriss, R. C.; Wofsy, Steven Charles; Bartlett, D. S.; Shipham, M. C.; Jacob, Daniel James; Hoell, J. M.; Bendura, R. J.; Drewry, J. W.; McNeal, R. J.; Navarro, R. L.; Gidge, R. N.; Rabine, V. E. (Wiley-Blackwell, 1992)
      The Arctic Boundary Layer Expedition (ABLE 3A) used measurements from ground, aircraft, and satellite platforms to characterize the chemistry and dynamics of the lower atmosphere over Arctic and sub-Arctic regions of North ...
    • The Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) Mission: Design, Execution, and First Results 

      Jacob, Daniel James; Crawford, J. H.; Maring, H.; Clarke, A. D.; Dibb, J. E.; Emmons, L. K.; Ferrare, R. A.; Hostetler, C. A.; Russell, P. B.; Singh, H. B.; Thompson, A. M.; Shaw, G. E.; McCauley, E.; Pederson, J. R.; Fisher, J. A. (European Geosciences Union, 2010)
      The NASA Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) mission was conducted in two 3-week deployments based in Alaska (April 2008) and western Canada (June–July 2008). Its ...
    • Arcuate hypothalamic AgRP and putative POMC neurons show opposite changes in spiking across multiple timescales 

      Mandelblat-Cerf, Yael; Ramesh, Rohan N; Burgess, Christian R; Patella, Paola; Yang, Zongfang; Lowell, Bradford B; Andermann, Mark L (eLife Sciences Publications, Ltd, 2015)
      Agouti-related-peptide (AgRP) neurons—interoceptive neurons in the arcuate nucleus of the hypothalamus (ARC)—are both necessary and sufficient for driving feeding behavior. To better understand the functional roles of AgRP ...
    • Are American Elections Sufficiently Democratic? 

      Thompson, Dennis (University of Pennsylvania Press, 2013-12-31)
    • Are Diversity Programs Merely Ceremonial? Evidence-Free Institutionalization 

      Dobbin, Frank; Kalev, Alexandra
      Institutionalists describe large domains of corporate policy and practice as symbolic. The work of entire departments is carried out to convey a firm’s commitment to efficiency (the now dismantled strategic planning unit) ...
    • Are global wind power resource estimates overstated? 

      Adams, Amanda S.; Keith, David (IOP Publishing, 2013)
      Estimates of the global wind power resource over land range from 56 to 400 TW. Most estimates have implicitly assumed that extraction of wind energy does not alter large-scale winds enough to significantly limit wind power ...
    • Are Government Bonds Net Wealth? 

      Barro, Robert J. (University of Chicago Press, 1974)
      The assumption that government bonds are perceived as net wealth by the private sector is crucial in demonstrating real effects of shifts in the stock of public debt. In particular, the standard effects of "expansionary" ...
    • Are H I Supershells the Remnants of Gamma-Ray Bursts? 

      Loeb, Abraham; Perna, Rosalba (American Astronomical Society, 1998)
      Gamma-ray bursts (GRBs) are thought to originate at cosmological distances from the most powerful explosions in the universe. If GRBs are not beamed, then the distribution of their number as a function of gamma-ray flux ...