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We have developed a methodology for calibrating 68Ge radioactivity content in a commercially-available calibration source for dose calibrators in a way that is
In 1975 Clifford Glenwood Shull was elected to membership in the National Academy of Science. He had earlier, 1956, been admitted to the American Academy of
Douglas A. Olson, Patrick J. Abbott, Karl Jousten, Fiona J. Redgrave, Pardeep Mohan, S S. Hong
This report describes a CCM key comparison of absolute pressure at five National Metrology Institutes (NMIs) that was carried out from August 1998 to May 2002
Nathan R. Newbury, Ian R. Coddington, William C. Swann
Coherent dual comb spectroscopy can provide high-resolution, high-accuracy measurements of a sample response in both magnitude and phase. We discuss the
Mary A. Rowe, G. M. Salley, E. J. Gansen, Shelley M. Etzel, Sae Woo Nam, Richard P. Mirin
We detail a mathematical framework for photoconductive gain applied to the detection of single photons. Because photoconductive gain is derived from the ability
Calvin Chan, Lee J. Richter, Brad A. Dinardo, Cherno Jaye, Brad Conrad, Hyun Wook Ro, David Germack, Daniel A. Fischer, Dean M. DeLongchamp, David J. Gundlach
D. G. Smillie, J C. Pickering, Gillian Nave, P. L. Smith
The spectrum of Co III has been recorded in the region 1562 Å to 2564 Å 64000 cm-1 to 39 000 cm-1 by Fourier transform (FT) spectroscopy, and in the region 1317
We demonstrate the cancellation of the differential ac Stark shift of the microwave hyperfine clock transition in trapped 87 Rb atoms. Recent progress in
In today's digital economy, data enters and leaves enterprises' cyberspace at record rates. For a typical enterprise, millions of emails are sent and received
Bhaskar Godugu, Pedatsur Neta, Yamil Simon, Stephen Stein
A prominent dissociation path for electrospray generated tryptic peptide ions is the dissociation of the peptide bond linking the second and third residues from
William C. Davis, Rolf L. Zeisler, John R. Sieber, Lee L. Yu
Two independent liquid chromatography inductively coupled plasma mass spectrometry (LC/ICP-MS) methods for the separation of arsenic species in urine have been
Erik K. Hobbie, Daneesh O. Simien, Jeffrey A. Fagan, JiYeon Huh, Jun Y. Chung, Steven D. Hudson, Jan Obrzut, Jack F. Douglas, Christopher M. Stafford
Ultrathin layers of single-wall carbon nanotubes (SWCNTs) show considerable promise for applications ranging from fuel-cell membranes and biochemical sensors to
Mickey Richardson, Eun S. Park, Jaehyun Kim, Gale A. Holmes
A small series of functionalized C60-fullerene/epoxy nanocomposites were prepared, and their respective ultimate tensile strengths were determined. The
Data from two full-scale residential smoke alarm fire test series were analyzed to estimate the performance of dual sensor photoelectric/ionization alarms as
Mark O. McLinden, Thomas J. Bruno, Michael D. Frenkel, Marcia L. Huber
The thermophysical properties of biofuels are required for the efficient design of every step in their production, distribution, and utilization. We provide an
The mechanical ASTM sieve analysis and roundness measurement methods are traditionally used for characterization of the glass beads utilized in traffic markings
Susan S. Tai, Jocelyn L. Prendergast, Lorna T. Sniegoski, Michael J. Welch, Karen W. Phinney, Nien F. Zhang
A new Standard Reference Material (SRM) for drugs of abuse in human serum (SRM 1959) has been developed. SRM 1959 is a frozen human serum material fortified
Daniel M. Anderson, Geoffrey B. McFadden, Sam R. Coriell, Bruce Murray
We consider a model for the solidification of an ideal ternary alloy in a mushy layer that incorporates the effects thermal and solutal diffusion, convection
We perform linear stability calculations for horizontal bilayers of a two-component fluid that can undergo a phase transformation, taking into account both
David L. Miller, Kevin Kubista, Gregory M. Rutter, Ming Ruan, Walt A. de Heer, Phillip First, Joseph A. Stroscio
The rotation of stacked honeycomb lattices produces an observable moir e pattern in the topography of scanning tunneling microscopy images, which have long been
Gheorghe Stan, Sergiy Krylyuk, Albert Davydov, Robert F. Cook
Detailed understanding and optimal control of the properties of Si nanowires are essential steps in developing Si nanoscale circuitry. In this work, we have
Interest in the domestic production of bio-derived fuels, sparked by the high cost of petroleum crude oil, the potential of supply disruptions, and fears about
Gale A. Holmes, Jae Hyun Kim, Stefan D. Leigh, Walter G. McDonough
The exact theories advanced by Curtin et al. (1991) and Hui, Phoenix, et al. (1995) to describe the fiber break evolution process in single fiber composites
Abram Van Der Geest, Katie Hurst, John H. Lehman, Mark T. Lusk
It has been experimentally observed that amorphous carbon is removed from as-prepared, bulk, single-walled carbon nanotubes by illumination with 248 nm (5 eV)
Microfluidic hydrodynamic focusing of an alcohol/lipid mixture into a narrow fluid stream by two oblique buffer streams provides a controlled and reproducible
John R. Kucklick, Michele M. Schantz, Rebecca S. Pugh, Barbara J. Porter, Dianne L. Poster, Paul R. Becker, Teresa Rowles, Stefan D. Leigh, Stephen A. Wise
The National Institute of Standards and Technology (NIST) has a diverse collection of control materials derived from marine mammal blubber, fat, and serum
E. N. Palacios, G. F. Wang, R. Burriel, Virgil Provenzano, Robert D. Shull
Doping with some metals (Fe, Cu, Ga, Mn, Al) reduces or removes the strong thermal hysteresis in the giant magnetocaloric alloys Gd_5}Si_x}Ge_1-x}_4}. We
The nature of the theory of circular Rydberg states of hydrogenlike ions allows highly-accurate predictions to be made for energy levels. In particular
Metal-semiconductor hybrid nanocrystals (HNCs) hold great potential in the fields of photocatalysis, biomedical imaging, and anticancer nanomedicine. However
Because of the fundamental importance of Bell's theorem, a loophole-free demonstration of a violation of local realism is highly desirable. Here, we study