Browsing FAS Scholarly Articles by Title
Now showing items 3473-3492 of 18292
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Demonstration of an Area-Enclosing Guided-Atom Interferometer for Rotation Sensing
(American Physical Society, 2007)We demonstrate area-enclosing atom interferometry based on a moving guide. Light pulses along the free-propagation direction of a magnetic guide are applied to split and recombine the confined atomic matter-wave, while the ... -
Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits
(American Association for the Advancement of Science (AAAS), 2012)Quantum computers have the potential to solve certain problems faster than classical computers. To exploit their power, it is necessary to perform interqubit operations and generate entangled states. Spin qubits are a ... -
Denaturation of Proteins by SDS and Tetraalkylammonium Dodecyl Sulfates
(American Chemical Society (ACS), 2011)This article describes the use of capillary electrophoresis (CE) to examine the influence of different cations (C(+); C(+) = Na(+) and tetra-n-alkylammonium, NR(4)(+), where R = Me, Et, Pr, and Bu) on the rates of denaturation ... -
Dendritic Growth Velocity and Diffusive Speed in Solidification of Undercooled Dilute Ni-Zr Melts
(Elsevier, 1997)During rapid solidification of undercooled melts deviations from local equilibrium occur at the solid-liquid interface. With increasing interface velocity <i>v</i>, the interfacial undercooling Delta<i>T-i</i> increases ... -
Denial and Punishment in the North Caucasus: Evaluating the Effectiveness of Coercive Counter-Insurgency
(Sage Publications, 2012)A growing literature on the subnational diffusion of armed conflict rests on the proposition that political violence triggers more violence, in the same locality and elsewhere. Yet state efforts to contain such uprisings ... -
Dense Cores in Perseus: The Influence of Stellar Content and Cluster Environment
(American Astronomical Society, 2009)We present the chemistry, temperature, and dynamical state of a sample of 193 dense cores or core candidates in the Perseus Molecular cloud and compare the properties of cores associated with young stars and clusters with ... -
Dense sampling of bird diversity increases power of comparative genomics
(Springer Science and Business Media LLC, 2020-11-11)Whole-genome sequencing projects are increasingly populating the tree of life and characterising biodiversity1–4. Sparse taxon sampling has been proposed to confound phylogenetic inference5 and captures only a fraction of ... -
Density and Temperature Structure of TMC‐1C from 450 and 850 Micron Maps
(American Astronomical Society, 2005) -
Density Jumps Near the Virial Radius of Galaxy Clusters
(American Astronomical Society, 2016)Recent simulations have indicated that the dark matter halos of galaxy clusters should feature steep density jumps near the virial radius. Since the member galaxies are expected to follow similar collisionless dynamics as ... -
Density Operators and Quasiprobability Distributions
(American Physical Society (APS), 1969)The problem of expanding a density operator ρ in forms that simplify the evaluation of important classes of quantum-mechanical expectation values is studied. The weight function P ( α ) of the P representation, the Wigner ... -
Density ripples in expanding low-dimensional gases as a probe of correlations
(American Physical Society (APS), 2009)We investigate theoretically the evolution of the two-point density correlation function of a low-dimensional ultracold Bose gas after release from a tight transverse confinement. In the course of expansion thermal and ... -
Density wave instabilities in a correlated two-dimensional metal
(American Physical Society (APS), 2014)Motivated by recent experimental evidence of charge order in the pseudogap phase of cuprates, we perform a variational analysis of spin-singlet density wave ordering in metals with antiferromagnetic interactions on the ... -
Density-based separation in multiphase systems provides a simple method to identify sickle cell disease
(Proceedings of the National Academy of Sciences, 2014)Although effective low-cost interventions exist, child mortality attributable to sickle cell disease (SCD) remains high in low-resource areas due, in large part, to the lack of accessible diagnostic methods. The presence ... -
Density-wave instabilities of fractionalized Fermi liquids
(American Physical Society (APS), 2014)Recent experiments in the underdoped regime of the hole-doped cuprates have found evidence for an incommensurate charge density-wave state. We present an analysis of the charge ordering instabilities in a metal with ... -
Dental development of the Taï Forest chimpanzees revisited
(Elsevier BV, 2010)Developmental studies consistently suggest that teeth are more buffered from the environment than other skeletal elements. The surprising finding of late tooth eruption in wild chimpanzees (Zihlman et al., 2004) warrants ... -
Dental evidence for ontogenetic differences between modern humans and Neanderthals
(Proceedings of the National Academy of Sciences, 2010)Humans have an unusual life history, with an early weaning age, long childhood, late first reproduction, short interbirth intervals, and long lifespan. In contrast, great apes wean later, reproduce earlier, and have longer ... -
Dental Evidence from the Aterian Human Populations of Morocco
(Springer-Verlag, 2012)The Aterian fossil hominins represent one of the most abundant series of human remains associated with Middle Stone Age/Middle Paleolithic assemblages in Africa. Their dates have been revised and they are now mostly assigned ... -
Dental Ontogeny in Pliocene and Early Pleistocene Hominins
(Public Library of Science, 2015)Until recently, our understanding of the evolution of human growth and development derived from studies of fossil juveniles that employed extant populations for both age determination and comparison. This circular approach ... -
Dental tissue proportions in fossil orangutans from mainland Asia and Indonesia
(Asian-Australian Association of Paleoanthopologists, 2011)Orangutans (Pongo) are the only great ape genus with a substantial Pleistocene and Holocene fossil record, demonstrating a much larger geographic range than extant populations. In addition to having an extensive fossil ... -
Deoxyfluorination of Phenols
(American Chemical Society, 2011)An operationally simple ipso fluorination of phenols with a new deoxyfluorination reagent is presented.