118 research outputs found
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This article was originally published in The Prophet -- a journal created by and for the students at the Boston University School of Theology (BUSTH) to amplify the voices of STH students by promoting and sharing a range of perspectives on matters of concern including, but not limited to, spiritual practices, faith communities and society, the nature of theology, and current affairs. It serves as a platform for STH students to share their academic work, theological reflections, and life experiences with one another and the wider community."It takes effort to better understand the language and nature of Howard Thurman..." [EXCERPT
On Poverty: a call for an economic and theological remedy
This article was originally published in The Prophet -- a journal created by and for the students at the Boston University School of Theology (BUSTH) to amplify the voices of STH students by promoting and sharing a range of perspectives on matters of concern including, but not limited to, spiritual practices, faith communities and society, the nature of theology, and current affairs. It serves as a platform for STH students to share their academic work, theological reflections, and life experiences with one another and the wider community."In understanding how the prevailing mode of capitalism benefits a select number of institutions and
their stakeholders, more and more Americans ought to be inclined to identify as economically
oppressed. If a successful attempt is to be made at solving the problem of poverty in the United
States, “deep solidarity” must be established among those on the margins of economic prosperity... " [EXCERPT
Cross Calibration of Hinode\u27s X-ray Telescope and Extreme Unltraviolet Imaging Spectrometer Using X-ray Bright Points
The focus of the present study is to produce a cross calibration factor for Hinode\u27s X-Ray Telescope (XRT) and Extreme Ultraviolet Imaging Spectrometer (EIS) instruments by using observations of X-ray bright points. Material in the center of several bright points will be analyzed using data from EIS, and these results will be applied to concurrent XRT data to generate a relative response ratio between the two instruments. A secondary purpose is to investigate the thermal characteristics of bright points themselves. The differential emission measure curves produced from the EIS observations will themselves be valuable information about these coronal phenomena
Crop Residues: The Rest of the Story
Synopsis In the February 15, 2009 issue of ES&T Strand and Benford argued that oceanic deposition of agricultural crop residues was a viable option for net carbon sequestration (43 [4], 1000−1007). In reviewing the calculations and bringing their experience to bear, Karlen et al. argue in this Viewpoint that crop residue oceanic permanent sequestration (CROPS) as envisioned by Strand and Benford will not work. They further propose alternative possibilities in agricultural methods to achieve a net decrease of CO2 emissions
Exploring the Origin and Fate of the Magellanic Stream with Ultraviolet and Optical Absorption
(Abridged) We present an analysis of ionization and metal enrichment in the
Magellanic Stream (MS), the nearest gaseous tidal stream, using HST/STIS and
FUSE ultraviolet spectroscopy of two background AGN, NGC 7469 and Mrk 335. For
NGC 7469, we include optical spectroscopy from VLT/UVES. In both sightlines the
MS is detected in low-ion and high-ion absorption. Toward NGC 7469, we measure
a MS oxygen abundance [O/H]_MS=[OI/HI]=-1.00+/-0.05(stat)+/-0.08(syst),
supporting the view that the Stream originates in the SMC rather than the LMC.
We use CLOUDY to model the low-ion phase of the Stream as a photoionized plasma
using the observed Si III/Si II and C III/C II ratios. Toward Mrk 335 this
yields an ionization parameter log U between -3.45 and -3.15 and a gas density
log (n_H/cm^-3) between -2.51 and -2.21. Toward NGC 7469 we derive sub-solar
abundance ratios for [Si/O], [Fe/O], and [Al/O], indicating the presence of
dust in the MS. The high-ion column densities are too large to be explained by
photoionization, but also cannot be explained by a single-temperature
collisional-ionization model (equilibrium or non-equilibrium). This suggests
the high-ion plasma is multi-phase. Summing over the low-ion and high-ion
phases, we derive conservative lower limits on the ratio N(total H II)/N(H I)
of >19 toward NGC 7469 and >330 toward Mrk 335, showing that along these two
directions the vast majority of the Stream has been ionized. The presence of
warm-hot plasma together with the small-scale structure observed at 21 cm
provides evidence for an evaporative interaction with the hot Galactic corona.
This scenario, predicted by hydrodynamical simulations, suggests that the fate
of the MS will be to replenish the Galactic corona with new plasma, rather than
to bring neutral fuel to the disk.Comment: Accepted for publication in ApJ. 18 pages, 7 figures, all in colo
Feedback and Brightest Cluster Galaxy Formation: ACS Observations of the Radio Galaxy TN J1338--1942 at z=4.1
We present deep optical imaging of the z=4.1 radio galaxy TN J1338--1942
obtained using the ACS on-board HST. The radio galaxy is known to reside within
a large galaxy overdensity (both in physical extent and density contrast).
There is good evidence that this `protocluster' region is the progenitor of a
present-day rich galaxy cluster. TN J1338 is the dominant galaxy in the
protocluster, in terms of size and luminosity and therefore seems destined to
evolve into the brightest cluster galaxy. The high spatial-resolution ACS
images reveal several kpc-scale features within and around the radio galaxy.
The continuum light is aligned with the radio axis and is resolved into two
clumps in the i-band and z-band bands. These components have luminosities ~10^9
L_sun and sizes of a few kpc. The estimated star-formation rate for the whole
radio galaxy is ~200 M_sun/yr. A simple model in which the jet has triggered
star-formation in these continuum knots is consistent with the available data.
An unusual feature is seen in Lyman-alpha emission. A wedge-shaped extension
emanates from the radio galaxy perpendicularly to the radio axis. This `wedge'
naturally connects to the surrounding, asymmetric, large-scale (~100 kpc)
Lyman-alpha halo. We posit that the wedge is a starburst-driven superwind,
associated with the first major epoch of formation of the brightest cluster
galaxy. The shock and wedge are examples of feedback processes due to both AGN
and star-formation in the earliest stages of massive galaxy formation.Comment: 41 pages, 12 figures. Accepted to Ap
The Restyled Federal Rules of Evidence
A lightly edited transcript of the Symposium held at the William & Mary School of Law on October 28, 2011
The Restyled Federal Rules of Evidence
A lightly edited transcript of the Symposium held at the William & Mary School of Law on October 28, 2011
The pattern of influenza virus attachment varies among wild bird species
The ability to attach to host cells is one of the main determinants of the host range of influenza A viruses. By using virus histochemistry, we investigate the pattern of virus attachment of both a human and an avian influenza virus in colon and trachea sections from 12 wild bird species. We show that significant variations exist, even between closely related avian species, which suggests that the ability of wild birds to serve as hosts for influenza viruses strongly varies among species. These results will prove valuable to assess the possibilities of interspecies transmission of influenza viruses in natural environments and better understand the ecology of influenza
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