Browsing FAS Scholarly Articles by Title
Now showing items 1916-1935 of 18292
-
The Chandra X‐Ray Observatory Resolves the X‐Ray Morphology and Spectra of a Jet in PKS 0637-752
(IOP Publishing, 2000)The core-dominated radio-loud quasar PKS 0637-752 (z = 0.654) was the first celestial object observed with the Chandra X-Ray Observatory, offering the early surprise of the detection of a remarkable X-ray jet. Several ... -
Chandra, MDM, Swift, and NuSTAR Observations Confirming the SFXT Nature of AX J1949.8+2534
(American Astronomical Society, 2019-06-07)AX J1949.8+2534 is a candidate supergiant fast X-ray transient (SFXT) observed in outburst by the International Gamma-ray Astrophysics Laboratory (IGR J19498+2534). We report on the results of six Neil Gehrels Swift-XRT, ... -
ChandraACIS Survey of M33 (ChASeM33): X‐Ray Imaging Spectroscopy of M33SNR 21, the Brightest X‐Ray Supernova Remnant in M33
(American Astronomical Society, 2007)We present and interpret new X-ray data for M33SNR 21, the brightest X-ray supernova remnant (SNR) in M33. The SNR is in seen projection against ( and appears to be interacting with) the bright H II region NGC 592. Data ... -
Chandrahigh-resolution Observations of Cid-42, A Candidate Recoiling Supermassive Black Hole
(American Astronomical Society, 2012)We present Chandra High Resolution Camera observations of CID-42, a candidate recoiling supermassive black hole (SMBH) at z = 0.359 in the COSMOS survey. CID-42 shows two optical compact sources resolved in the HST/ACS ... -
ChandraStudy of a Complete Sample of Millisecond Pulsars in 47 Tucanae and NGC 6397
(American Astronomical Society, 2002) -
A Change Has Come: Race, Politics, and the Path to the Obama Presidency
(Cambridge University Press, 2009)Has Barack Obama's success transformed the racial divide? Did he somehow transcend or help bring to an end centuries of racial division in the United States? Did he deliberately run a strategically race-neutral, race-evading ... -
Changes in Bacterial and Archaeal Community Structure and Functional Diversity Along a Geochemically Variable Soil Profile
(American Society for Microbiology, 2008)Spatial heterogeneity in physical, chemical, and biological properties of soils allows for the proliferation of diverse microbial communities. Factors influencing the structuring of microbial communities, including ... -
Changes in canopy structure and ant assemblages affect soil ecosystem variables as a foundation species declines
(Ecological Society of America, 2015)The decline of Tsuga canadensis (eastern hemlock) – a foundation tree species – due to infestation by Adelges tsugae (hemlock woolly adelgid) or its complete removal from a stand by salvage logging dramatically affects ... -
Changes in Deep Pacific Temperature During the Mid-Pleistocene Transition and Quaternary
(Elsevier BV, 2010)An attempt is made to unravel the dual influences of seawater temperature and isotopic composition upon the oxygen-isotope records of benthic foraminifers from the deep Pacific \((δ^{18}O_{b})\). Our approach is to estimate ... -
Changes in drug sensitivity and anti-malarial drug resistance mutations over time among Plasmodium falciparum parasites in Senegal
(BioMed Central, 2013)Background: Malaria treatment efforts are hindered by the rapid emergence and spread of drug resistant parasites. Simple assays to monitor parasite drug response in direct patient samples (ex vivo) can detect drug resistance ... -
Changes in the Incidence and Duration of Periods Without Insurance
(Massachusetts Medical Society, 2009)BACKGROUND: Policymakers have recently proposed ways of providing health care coverage for an increased number of uninsured persons. However, there are few data that show how the incidence and duration of periods in which ... -
Changes in the Neural Control of a Complex Motor Sequence during Learning
(American Physiological Society, 2011)The acquisition of complex motor sequences often proceeds through trial-and-error learning, requiring the deliberate exploration of motor actions and the concomitant evaluation of the resulting performance. Songbirds learn ... -
Changes in the Phase of the Annual Cycle of Surface Temperature
(Nature Publishing Group, 2009)The annual cycle in the Earth's surface temperature is extremely large—comparable in magnitude to the glacial–interglacial cycles over most of the planet. Trends in the phase and the amplitude of the annual cycle have been ... -
Changes in the Seasonal Cycle of Temperature and Atmospheric Circulation
(American Meteorological Society, 2012)The vast majority of variability in the instrumental surface temperature record is at annual frequencies. Systematic changes in the yearly Fourier component of surface temperature have been observed since the midtwentieth ... -
Changes in the tension in dsDNA alter the conformation of RecA bound to dsDNA–RecA filaments
(Oxford University Press (OUP), 2011)The RecA protein is an ATPase that mediates recombination via strand exchange. In strand exchange a single-stranded DNA (ssDNA) bound to RecA binding site I in a RecA/ssDNA filament pairs with one strand of a double-stranded ... -
Changes in the X-ray Emission from the Magnetar Candidate 1E 2259+ 586 during its 2002 Outburst
(American Astronomical Society, 2004)An outburst of more than 80 individual bursts, similar to those seen from Soft Gamma Repeaters (SGRs), was detected from the anomalous X-ray pulsar (AXP) 1E 2259+586 in 2002 June. Coincident with this burst activity were ... -
Changing entrepreneurial intention and behaviour: a digital game-based learning environment dedicated to entrepreneurship education
(Inderscience Publishers, 2015)This paper investigates the research field of digital game-based learning (DGBL), attempting to shed light on the effect of a serious game (SG) for entrepreneurship education (EE). Based on 73 items an exploratory survey ... -
The Changing Evidence Base of Social Science Research
(Routedge, 2009) -
Changing patterns of social inequalities in anaemia among women in India: cross-sectional study using nationally representative data
(BMJ Group, 2013)Objectives: To examine the patterns of social inequalities in anaemia over time among women of reproductive age in India. Design: Repeated cross-sectional study using nationally representative data from the 1998/1999 and ... -
The Changing Role of Nominal Government Bonds in Asset Allocation
(Palgrave Macmillan, 2009)The covariance between nominal bonds and stocks has varied considerably over recent decades and has even switched sign. It has been predominantly positive in periods such as the late 1970s and early 1980s when the economy ...