Browsing FAS Scholarly Articles by Title

Dendritic Growth Velocity and Diffusive Speed in Solidification of Undercooled Dilute Ni-Zr Melts

Schwarz, Mikael; Arnold, Craig B.; Aziz, Michael; Herlach, Dieter M. (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

Toft, Monica Duffy; Zhukov, Yuri Maximovich (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

Foster, Jonathan B.; Rosolowsky, Erik W.; Kauffmann, Jens; Pineda, Jaime Eduardo; Borkin, Michelle Anne; Caselli, Paola; Myers, Philip C.; Goodman, Alyssa (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

Edwards, Scott (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

Schnee, S.; Goodman, A. (American Astronomical Society, 2005)

Density Jumps Near the Virial Radius of Galaxy Clusters

Patej, Anna; Loeb, Abraham (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

Cahill, K. E.; Glauber, Roy J. (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

Imambekov, A.; Mazets, I. E.; Petrov, D. S.; Gritsev, V.; Manz, S.; Hofferberth, Sebastian; Schumm, T.; Demler, Eugene A.; Schmiedmayer, J. (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

Allais, Andrea; Bauer, Johannes; Sachdev, Subir (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

Kumar, A. A.; Patton, Matthew Reiser; Hennek, J. W.; Lee, S. Y. R.; D, G.; Yang, X.; Kanter, J.; Shevkoplyas, S. S.; Brugnara, Carlo; Whitesides, George McClelland (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

Chowdhury, Debanjan; Sachdev, Subir (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

Smith, Tanya; Smith, B.H.; Reid, D.J.; Siedel, H.; Vigilant, L.; Hublin, J.J.; Boesch, C. (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

Smith, Tanya; Tafforeau, P.; Reid, D. J.; Pouech, J.; Lazzari, V.; Zermeno, J. P.; Guatelli-Steinberg, D.; Olejniczak, A. J.; Hoffman, A.; Radovcic, J.; Makaremi, M.; Toussaint, M.; Stringer, C.; Hublin, J.-J. (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 ...