1,250 research outputs found
Directing For the Small Professional Theatre: Directing Nothing Sacred
The challenges of producing and directing small professional theatre in any metropolitan area are many. This thesis is concerned with the process of finding a producing theatre, casting, rehearsal and staging the play, Nothing Sacred by George F. Walker, in the Washington D.C. metropolitan area. Unlike many thesis projects this one was conducted completely outside of the university setting and is thus a true reflection of the small professional theatre community
A Review of the Effectiveness and Side-Effects of Fluocinolone Acetonide 0.1% in the Treatment of Oral Mucosal Diseases
Topikalni steroidi naširoko se koriste u liječenju simptomatskih lezija oralne sluznice kako bi se smanjile bol i upala. Potentni topikalni steroidi, poput klobetazol propionata, flucinolon acetonida (FA) i flucinonida, koriste se u liječenju tvrdokornih lezija oralne sluznice. U mnogim se izvještajima pokazalo da su navedeni steroidi učinkoviti u liječenju oralnih lezija uz malo popratnih pojava. U ovom preglednom radu opisuju se djelotvornost i popratne pojave korištenja FA 0,1 % u liječenju simptomatskog oralnog lihena planusa (OLP), oralne lihenoidne reakcije na lijekove (OLR-L), oralnog pemfigusa i eritema multiforme povezanog s herpesom (HAEM). FA 0,1 % pokazao se učinkovitim i sigurnim u liječenju pacijenata s multiplim sistemskim bolestima i trudnica s HAEM-om. Nadalje, taj topikalni steroid brzo smanjuje bol i upalu te pospješuje cijeljenje lezija bez ozbiljnih nuspojava, osim pseudomembranozne kandidijaze koja se jednostavno liječi. U nekim slučajevima dugoročna terapija FA-om 0.1 % rezultirala je hiperpigmentacijom u područjima zacijeljenih oralnih lezija, no takve
hiperpigmentacije postupno su nestale nakon prestanka primjene topikalnog steroida.Topical steroids have been widely used in the treatment of symptomatic oral lesions to reduce pain and inflammation. Potent topical steroids such as clobetasol propionate, fluocinolone acetonide (FA), and fluocinonide have been widely used in the treatment of severe oral mucosal lesions. Many reports have demonstrated that these steroids were effective in treating oral lesions with only minor side-effects. This review describes the effectiveness and side-effects of using FA 0.1% in the treatment of symptomatic oral lichen planus (OLP), oral lichenoid drug reaction (OLDR), oral pemphigus, and herpes associated erythema multiforme (HAEM). FA 0.1% was effective and safe in the treatment of patients with multiple systemic diseases and a pregnant patient with HAEM. Moreover, this topical steroid rapidly reduced pain, inflammation, and enhanced lesion healing with no serious side-effects other than pseudomembranous candidiasis, which is easily treated. In some cases, a long-term treatment with FA 0.1% resulted in hyperpigmentation at the areas of previously healed oral lesions; however, this hyperpigmentation was gradually resolved after discontinuing topical steroid treatment
Modeling the Effects of Star Formation Histories on Halpha and Ultra-Violet Fluxes in Nearby Dwarf Galaxies
We consider the effects of non-constant star formation histories (SFHs) on
Halpha and GALEX far ultra-violet (FUV) star formation rate (SFR) indicators.
Under the assumption of a fully populated Chabrier IMF, we compare the
distribution of Halpha-to-FUV flux ratios from ~ 1500 simple, periodic model
SFHs with observations of 185 galaxies from the Spitzer Local Volume Legacy
survey. We find a set of SFH models that are well matched to the data, such
that more massive galaxies are best characterized by nearly constant SFHs,
while low mass systems experience bursts amplitudes of ~ 30 (i.e., an increase
in the SFR by a factor of 30 over the SFR during the inter-burst period), burst
durations of tens of Myr, and periods of ~ 250 Myr; these SFHs are broadly
consistent with the increased stochastic star formation expected in systems
with lower SFRs. We analyze the predicted temporal evolution of galaxy stellar
mass, R-band surface brightness, Halpha-derived SFR, and blue luminosity, and
find that they provide a reasonable match to observed flux distributions. We
find that our model SFHs are generally able to reproduce both the observed
systematic decline and increased scatter in Halpha-to-FUV ratios toward low
mass systems, without invoking other physical mechanisms. We also compare our
predictions with those from the Integrated Galactic IMF theory with a constant
SFR. We find that while both predict a systematic decline in the observed
ratios, only the time variable SFH models are capable of producing the observed
population of low mass galaxies ( < 10 Msun) with normal
Halpha-to-FUV ratios. These results demonstrate that a variable IMF alone has
difficulty explaining the observed scatter in the Halpha-to-FUV ratios. We
conclude by considering the limitations of the model SFHs, and discuss the use
of additional empirical constraints to improve future SFH modeling efforts.Comment: 15 pages, 11 Figures. Accepted for publication in Ap
Religious Identity, Religious Attendance, and Parental Control
Using a national sample of adolescents aged 10–18 years and their parents (N = 5,117), this article examines whether parental religious identity and religious participation are associated with the ways in which parents control their children. We hypothesize that both religious orthodoxy and weekly religious attendance are related to heightened levels of three elements of parental control: monitoring activities, normative regulations, and network closure. Results indicate that an orthodox religious identity for Catholic and Protestant parents and higher levels of religious attendance for parents as a whole are associated with increases in monitoring activities and normative regulations of American adolescents
Spitzer Space Telescope observations of the Carina Nebula: The steady march of feedback-driven star formation
We report the first results of imaging the Carina Nebula with Spitzer/IRAC,
providing a catalog of point sources and YSOs based on SED fits. We discuss
several aspects of the extended emission, including dust pillars that result
when a clumpy molecular cloud is shredded by massive star feedback. There are
few "extended green objects" (EGOs) normally taken as signposts of outflow
activity, and none of the HH jets detected optically are seen as EGOs. A
population of "extended red objects" tends to be found around OB stars, some
with clear bow-shocks. These are dusty shocks where stellar winds collide with
flows off nearby clouds. Finally, the relative distributions of O stars and
subclusters of YSOs as compared to dust pillars shows that while some YSOs are
located within pillars, many more stars and YSOs reside just outside pillar
heads. We suggest that pillars are transient phenomena, part of a continuous
outwardly propagating wave of star formation driven by massive star feedback.
As pillars are destroyed, they leave newly formed stars in their wake, which
are then subsumed into the young OB association. Altogether, the current
generation of YSOs shows no strong deviation from a normal IMF. The number of
YSOs suggests a roughly constant star-formation rate over the past 3Myr,
implying that star formation in pillars constitutes an important mechanism to
construct unbound OB associations. Accelerated pillars may give birth to O-type
stars that, after several Myr, could appear to have formed in isolation.Comment: 25 pages, 15 figures, MNRAS accepte
Gas Metallicities in the Extended Disks of NGC 1512 and NGC 3621. Chemical Signatures of Metal Mixing or Enriched Gas Accretion?
(Abridged) We have obtained spectra of 135 HII regions located in the inner
and extended disks of the spiral galaxies NGC 1512 and NGC 3621, spanning the
range of galactocentric distances 0.2-2 x R25 (from 2-3 kpc to 18-25 kpc). We
find that the excitation properties of nebulae in the outer (R>R25) disks are
similar to those of the inner disks, but on average younger HII regions tend to
be selected in the bright inner disks. Reddening by dust is not negligible in
the outer disks, and subject to significant large-scale spatial variations. For
both galaxies the radial abundance gradient flattens to a constant value
outside of the isophotal radius. The outer disk O/H abundance ratio is highly
homogeneous, with a scatter of only ~0.06 dex. Based on the excitation and
chemical (N/O ratio) analysis we find no compelling evidence for variations in
the upper initial mass function of the ionizing clusters of extended disks. The
O/H abundance in the outer disks of the target galaxies corresponds to 35% of
the solar value (or higher, depending on the metallicity diagnostic). This
conflicts with the notion that metallicities in extended disks of spiral
galaxies are necessarily low. The observed metal enrichment cannot be produced
with the current level of star formation. We discuss the possibility that metal
transport mechanisms from the inner disks lead to metal pollution of the outer
disks. Gas accretion from the intergalactic medium, enriched by outflows,
offers an alternative solution.Comment: Accepted for publication in the Astrophysical Journa
Correlation between deep-level defects and functional properties of β-(SnxGa1-x)2O3 on Si photodetectors
Heterogeneous integration of β-(SnxGa1-x)2O3 (TGO) UV-C photodetectors on silicon substrates by molecular beam epitaxy is demonstrated. Multimodal electron microscopy and spectroscopy techniques reveal a direct correlation between structural, compositional and optical properties of the TGO and the functional properties of the photodetectors. Wavelength dispersive X-ray spectroscopy results accurately determine the Sn concentrations (x) in the region of 0.020, and room temperature cathodoluminescence (CL) hyperspectral imaging shows changes in CL emission intensity in the TGO compared with a Ga2O3 sample with no Sn. Alloying Ga2O3 with Sn is shown to quench the red emission and enhance the blue emission. The increase in blue emission corresponds to the rise in VGa-related deep acceptors responsible for the high gain observed in the TGO detectors. A Ga2O3 nucleation layer is shown to improve the TGO surface quality and give better device properties compared to TGO grown directly onto the Si substrate, including a higher specific detectivity on the order of 1012 Jones
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