Browsing FAS Scholarly Articles by Title
Now showing items 1447-1466 of 18292
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The Black-Hole Accretion Disk in NGC 4258: One of Nature’s Most Beautiful Dynamical Systems
(Astronomical Society of the Pacific, 2008)In this talk I will summarize some of the work that the CfA group has done to study the structure of the water masers in the accretion disk of NGC4258. A series of 18 epochs of VLBA data taken from 1997.3 to 2000.8 were ... -
Blackbody Radiation From Isolated Neptunes
(American Astronomical Society, 2016)Recent analyses of the orbits of some Kuiper Belt objects hypothesize the presence of an undiscovered Neptune-size planet at a very large separation from the Sun. The energy budget of Neptunes on such distant orbits is ... -
The Blank Slate
(Society for General Psychology (Division 1 of American Psychological Association), 2006) -
Blast-induced phenotypic switching in cerebral vasospasm
(Proceedings of the National Academy of Sciences, 2011)Vasospasm of the cerebrovasculature is a common manifestation of blast-induced traumatic brain injury (bTBI) reported among combat casualties in the conflicts in Afghanistan and Iraq. Cerebral vasospasm occurs more frequently, ... -
Blind Signal Classification via Sparse Coding
(2016)We propose a novel RF signal classification method based on sparse coding, an unsupervised learning method popular in computer vision. In particular, we employ a convolutional sparse coder that can extract high-level ... -
Bloch oscillations of bosonic lattice polarons
(American Physical Society (APS), 2014)We consider a single-impurity atom confined to an optical lattice and immersed in a homogeneous Bose-Einstein condensate (BEC). Interaction of the impurity with the phonon modes of the BEC leads to the formation of a stable ... -
Block Modeling with Connected Fault-Network Geometries and a Linear Elastic Coupling Estimator in Spherical Coordinates
(Seismological Society of America, 2009)Geodetic observations of interseismic deformation provide constraints on the partitioning of fault slip across plate boundary zones, the spatial distribution of both elastic and inelastic strain accumulation, and the ... -
Block Models of Crustal Motion in Southern California Constrained by GPS Measurements
(American Geophysical Union, 2005)We estimate slip rates on major active faults in southern California using a block model constrained by Global Positioning System measurements of interseismic deformation. The block model includes the effects of block ... -
Block-and-break generation of microdroplets with fixed volume
(AIP Publishing, 2013)We introduce a novel type of droplet generator that produces droplets of a volume set by the geometry of the droplet generator and not by the flow rates of the liquids. The generator consists of a classic T-junction with ... -
Block-based Bayesian epistasis association mapping with application to WTCCC type 1 diabetes data
(Institute of Mathematical Statistics, 2011)Interactions among multiple genes across the genome may contribute to the risks of many complex human diseases. Whole-genome single nucleotide polymorphisms (SNPs) data collected for many thousands of SNP markers from ... -
Blogging, Now and Then (250 Years Ago)
(Informa UK Limited, 2013)Long before the Internet, Europeans exchanged information in ways that anticipated blogging. The key element of their information system was the “anecdote,” a term that meant nearly the opposite then from what it means ... -
Blood Wedding, Yerma, and The House of Bernarda Alba. Garcia Lorca's Tragic Trilogy
(University of Pennsylvania Press, 1994) -
Bloody Mary: Traces of the Peplum Cruentatum in Prague—and in Strasbourg?
(Brepols Publishers, 2011) -
Blossom: A Decentralized Approach to Overcoming Systemic Internet Fragmentation
(2005)The Internet is systemically fragmented. We consider the causes of fragmentation, including both technical concerns, such as middleboxes and routing failure, as well as political concerns, such as incomplete peering and ... -
The Blue Tip of the Stellar Locus: Measuring Reddening with the Sloan Digital Sky Survey
(IOP Publishing, 2010)We present measurements of reddening due to dust using the colors of stars in the Sloan Digital Sky Survey (SDSS). We measure the color of main-sequence turnoff stars by finding the "blue tip" of the stellar locus: the ... -
BMP Signaling Controls Buckling Forces to Modulate Looping Morphogenesis of the Gut
(Proceedings of the National Academy of Sciences, 2017-02-13)Looping of the initially straight embryonic gut tube is an essential aspect of intestinal morphogenesis, permitting proper placement of the lengthy small intestine within the confines of the body cavity. The formation of ... -
BMP signaling is required for the generation of primordial germ cells in an insect
(Proceedings of the National Academy of Sciences, 2014)Many model organisms specify germ cells using maternally supplied germ-line determinants. In contrast, mice rely on embryonic cell–cell signaling to induce cells to become germ cells. Molecular evidence for inductive ... -
BMS supertranslations and Weinberg’s soft graviton theorem
(Springer Science + Business Media, 2015)Recently it was conjectured that a certain infinite-dimensional “diagonal” subgroup of BMS supertranslations acting on past and future null infinity (I − and I +) is an exact symmetry of the quantum gravity S-matrix, and ... -
Bodin, Montaigne and the Role of Disciplinary Boundaries
(University of Rochester Press, 1997)Michel de Montaigne (1533-92) and Jean Bodin (1529-96) were contemporaries, compatriots and colleagues. Both served as officers in the Parlements, Montaigne as a counselor in Bordeaux and Bodin as a barrister in Paris. ...