1,282 research outputs found
One of Us
With this thesis, I reflect on my identity as a Saudi American. I look at how nonverbal communication through gesture and artifact presents the potential for both communication breakdowns, as well as shared understanding. From the lens of Saudi culture, I consider how gender relations and intra-national tribal factions play a role in the division of society, which my work seeks to overcome, at both the national and global levels. My exhibit, One of Us, interrogates one of the most controversial gestures in contemporary society: veiling. As I discuss the notion of camouflage, I review the types of veils available to women, and the reasons why women veil. The abayas featured in my exhibit are constructed from nostalgic patterns, thus producing in the viewer a simultaneous feeling of familiarity and novelty, and in the wearer, of blending in and standing out
An overview of recent research in marine biological invasions
The Topical Collection on Invasive Species includes 50 articles addressing many tenets of marine invasion ecology. The collection covers important topics relating to propagule pressure associated with transport vectors, species characteristics, attributes of recipient ecosystems, invasion genetics, biotic interactions, testing of invasion hypotheses, invasion dynamics and spread, and impacts of nonindigenous species. This article summarizes some of the collectionâs highlights
NILAI MORAL DALAM FILM OUR SHINING DAYS KARYA WANG RAN
Karya sastra merupakan karya seni berbentuk lisan maupun tulisan yang menggunakan bahasa sebagai mediumnya untuk memberikan gambaran hidup. Penelitian ini membahas tentang nilai-nilai moral pada film Our Shining DaysăéȘć
ć°ć„ł; shaÌnguaÌng shaÌonĂŒÌăkarya Wang Ran. Penelitian ini bertujuan untuk mendeskripsikan nilai- nilai moral yang terdapat pada film Our Shining DaysăéȘć
ć°ć„łăkarya Wang Ran. Film ini bercerita tentang sekolah musik yang memiliki dua jurusan yaitu jurusan musik tradisional Cina dan juga jurusan musik klasik yang tidak akur satu sama lain. Pada penelitian ini teori yang digunakan adalah teori sosiologi sastra dari Alan Swingewood. Metode penelitian yang digunakan dalam penelitian ini adalah metode deskriptif kualitatif. Data penelitian berupa dialog dan tindakan para tokoh yang memuat nilai-nilai moral. Sumber data penelitian ini adalah film Our Shining DaysăéȘć
ć°ć„łă karya Wang Ran. Hasil penelitian menunjukan bahwa wujud nilai moral yang terdapat pada film Our Shining DaysăéȘć
ć°ć„łă karya Wang Ran adalah hubungan manusia dengan diri sendiri dengan nilai moral baik yaitu kerja keras dan keberanian serta hubungan manusia dengan manusia lain dengan nilai moral baik yaitu suka menolong, peduli, kerja sama dan musyawarah serta nilai moral buruk yaitu merendahkan dan diskriminasi.Karya sastra merupakan karya seni berbentuk lisan maupun tulisan yang menggunakan bahasa sebagai mediumnya untuk memberikan gambaran hidup. Penelitian ini membahas tentang nilai-nilai moral pada film Our Shining Days?????; sha?ngua?ng shĂ onĂŒ??karya Wang Ran. Penelitian ini bertujuan untuk mendeskripsikan nilai- nilai moral yang terdapat pada film Our Shining Days??????karya Wang Ran. Film ini bercerita tentang sekolah musik yang memiliki dua jurusan yaitu jurusan musik tradisional Cina dan juga jurusan musik klasik yang tidak akur satu sama lain. Pada penelitian ini teori yang digunakan adalah teori sosiologi sastra dari Alan Swingewood. Metode penelitian yang digunakan dalam penelitian ini adalah metode deskriptif kualitatif. Data penelitian berupa dialog dan tindakan para tokoh yang memuat nilai-nilai moral. Sumber data penelitian ini adalah film Our Shining Days?????? karya Wang Ran. Hasil penelitian menunjukan bahwa wujud nilai moral yang terdapat pada film Our Shining Days?????? karya Wang Ran adalah hubungan manusia dengan diri sendiri dengan nilai moral baik yaitu kerja keras dan keberanian serta hubungan manusia dengan manusia lain dengan nilai moral baik yaitu suka menolong, peduli, kerja sama dan musyawarah serta nilai moral buruk yaitu merendahkan dan diskriminasi
Spectral energy distributions of quasars selected in the mid-infrared
We present preliminary results on fitting of SEDs to 142 z>1 quasars selected
in the mid-infrared. Our quasar selection finds objects ranging in extinction
from highly obscured, type-2 quasars, through more lightly reddened type-1
quasars and normal type-1s. We find a weak tendency for the objects with the
highest far-infrared emission to be obscured quasars, but no bulk systematic
offset between the far-infrared properties of dusty and normal quasars as might
be expected in the most naive evolutionary schemes. The hosts of the type-2
quasars have stellar masses comparable to those of radio galaxies at similar
redshifts. Many of the type-1s, and possibly one of the type-2s require a very
hot dust component in addition to the normal torus emission.Comment: 4 pages, 2 figures, to appear in the proceedings of The Spectral
Energy Distribution of Galaxies, Preston, September 2011, eds R.J. Tuffs &
C.C. Popesc
The extraordinary mid-infrared spectral properties of FeLoBAL Quasars
We present mid-infrared spectra of six FeLoBAL QSOs at 1<z<1.8, taken with
the Spitzer space telescope. The spectra span a range of shapes, from hot dust
dominated AGN with silicate emission at 9.7 microns, to moderately obscured
starbursts with strong Polycyclic Aromatic Hydrocarbon (PAH) emission. The
spectrum of one object, SDSS 1214-0001, shows the most prominent PAHs yet seen
in any QSO at any redshift, implying that the starburst dominates the mid-IR
emission with an associated star formation rate of order 2700 solar masses per
year. With the caveats that our sample is small and not robustly selected, we
combine our mid-IR spectral diagnostics with previous observations to propose
that FeLoBAL QSOs are at least largely comprised of systems in which (a) a
merger driven starburst is ending, (b) a luminous AGN is in the last stages of
burning through its surrounding dust, and (c) which we may be viewing over a
restricted line of sight range.Comment: ApJ, accepte
Far-Infrared Properties of Spitzer-selected Luminous Starbursts
We present SHARC-2 350 micron data on 20 luminous z ~ 2 starbursts with
S(1.2mm) > 2 mJy from the Spitzer-selected samples of Lonsdale et al. and
Fiolet et al. All the sources were detected, with S(350um) > 25 mJy for 18 of
them. With the data, we determine precise dust temperatures and luminosities
for these galaxies using both single-temperature fits and models with power-law
mass--temperature distributions. We derive appropriate formulae to use when
optical depths are non-negligible. Our models provide an excellent fit to the
6um--2mm measurements of local starbursts. We find characteristic
single-component temperatures T1 ~ 35.5+-2.2 K and integrated infrared (IR)
luminosities around 10^(12.9+-0.1) Lsun for the SWIRE-selected sources.
Molecular gas masses are estimated at 4 x 10^(10) Msun, assuming
kappa(850um)=0.15 m^2/kg and a submillimeter-selected galaxy (SMG)-like
gas-to-dust mass ratio. The best-fit models imply >~2 kpc emission scales. We
also note a tight correlation between rest-frame 1.4 GHz radio and IR
luminosities confirming star formation as the predominant power source. The
far-IR properties of our sample are indistinguishable from the purely
submillimeter-selected populations from current surveys. We therefore conclude
that our original selection criteria, based on mid-IR colors and 24 um flux
densities, provides an effective means for the study of SMGs at z ~ 1.5--2.5.Comment: 13 pages, 4 figures, edited to match published version in ApJ 717,
29-39 (2010
Adaptive Optics Discovery of Supernova 2004ip in the Nuclear Regions of the Luminous Infrared Galaxy IRAS 18293-3413
We report a supernova discovery in Ks-band images from the NAOS CONICA
adaptive optics (AO) system on the ESO Very Large Telescope (VLT). The images
were obtained as part of a near-infrared search for highly-obscured supernovae
in the nuclear regions of luminous and ultraluminous infrared galaxies. SN
2004ip is located within a circumnuclear starburst at 1.4 arcsec (or 500 pc)
projected distance from the K-band nucleus of the luminous infrared galaxy IRAS
18293-3413. The supernova luminosity and light curve are consistent with a
core-collapse event suffering from a host galaxy extinction of up to about 40
magnitudes in V-band which is as expected for a circumnuclear starburst
environment. This is the first supernova to be discovered making use of AO
correction and demonstrates the potential of the current 8-meter class
telescopes equipped with AO in discovering supernovae from the innermost
nuclear regions of luminous and ultraluminous infrared galaxies.Comment: 4 pages, 3 figures, ApJ Letters (accepted
Assemblage structure: an overlooked component of human-mediated species movements among freshwater ecosystems
The spread and impact of alien species among freshwater ecosystems has increased with global trade and human movement; therefore, quantifying the role of anthropogenic and ecological factors that increase the risk of invasion is an important conservation goal. Two factors considered as null models when assessing the potential for invasion are colonization pressure (i.e., the number of species introduced) and propagule pressure [i.e., the number (propagule size), and frequency (propagule number), of individuals of each species introduced]. We translate the terminology of species abundance distributions to the invasion terminology of propagule size and colonization size (PS and CS, respectively). We conduct hypothesis testing to determine the underlying statistical species abundance distribution for zooplankton assemblages transported between freshwater ecosystems; and, on the basis of a lognormal distribution, construct four hypothetical assemblages spanning assemblage structure, rank-abundance gradient (e.g., even vs uneven), total abundance (of all species combined), and relative contribution of PS vs CS. For a given CS, many combinations of PS and total abundance can occur when transported assemblages conform to a lognormal species abundance distribution; therefore, for a given transportation event, many combinations of CS and PS are possible with potentially different ecological outcomes. An assemblage exhibiting high PS but low CS (species poor, but highly abundant) may overcome demographic barriers to establishment, but with lower certainty of amenable environmental conditions in the recipient region; whereas, the opposite extreme, high CS and low PS (species rich, but low abundance per species) may provide multiple opportunities for one of n arriving species to circumvent environmental barriers, albeit with lower potential to overcome demographic constraints. Species abundance distributions and the corresponding influence of CS and PS are some of many influential factors (e.g., demographic and genetic stochasticity, environmental variability, composition of recipient ecosystems) that will help refine an understanding of establishment risk following the human-mediated movement of species
Probing the Mpc-scale environment of hyperluminous infrared galaxies at 2<z<4
Protoclusters are important for studying how halo mass and stellar mass
assemble in the early universe. Finding signposts of such over-dense regions is
a popular method to identify protocluster candidates. Hyperluminous infrared
galaxies (HLIRGs), are expected to reside in overdense regions with massive
halos. We study the Mpc-scale environment of the largest HLIRG sample to date
and investigate whether they predominantly live in overdense regions. We first
explore the surface density of Herschel 250 m sources around HLIRGs and
compare with that around random positions. Then, we compare the spatial
distribution of neighbours around HLIRGs with that around randomly selected
galaxies using a deep IRAC-selected catalogue with good-quality photometric
redshifts. We also use a redshift-matched quasar sample and submillimeter
galaxy (SMG) sample to validate our method, as previous clustering studies have
measured the host halo masses of these populations. Finally, we adopt a Friends
of Friends (FOF) algorithm to seek (proto)clusters that host HLIRGs. We find
that HLIRGs tend to have more bright star-forming neighbours (with 250 m
flux density >10 mJy) within 100\arcsec projected radius than a random galaxy
at a 3.7 significance. In our 3D analysis, we find relatively weak
excess of IRAC-selected sources within 3 Mpc around HLIRGs compared with random
galaxy neighbours, mainly influenced by photometric redshift uncertainty and
survey depth. We find a more significant difference (at a 4.7
significance) in the number of Low Frequency Array (LOFAR)-detected neighbours
in the deepest EN1 field. HLIRGs at 3 < z < 4 show stronger excess compared to
HLIRGs at 2 < z < 3, consistent with cosmic downsizing. Finally, we select and
present a list of 30 most promising protocluster candidates for future
follow-up observations.Comment: 19 pages, 10 figures, accepted by A&
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