6,972 research outputs found
Philip Chol Gai
No full textabstract: In 1987, Philip escaped the war before it reached his village. He was tending to the cattle and the goats when he saw smoke and fire coming from the war.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 26Region: Upper NileThis picture and bio was donated to the Lost Boys Found project from The Arizona Lost Boys Cente
THE INSIDIOUS BOOSTING OF THERMALLY PULSING ASYMPTOTIC GIANT BRANCH STARS IN INTERMEDIATE-AGE MAGELLANIC CLOUD CLUSTERS
No full textIn the recent controversy about the role of thermally pulsing asymptotic giant branch (TP-AGB) stars in evolutionary population synthesis (EPS) models of galaxies, one particular aspect is puzzling: TP-AGB models aimed at reproducing the lifetimes and integrated fluxes of the TP-AGB phase in Magellanic Cloud (MC) clusters, when incorporated into EPS models, are found to overestimate, to various extents, the TP-AGB contribution in resolved star counts and integrated spectra of galaxies. In this paper, we call attention to a particular evolutionary aspect, linked to the physics of stellar interiors, that in all probability is the main cause of this conundrum. As soon as stellar populations intercept the ages at which red giant branch stars first appear, a sudden and abrupt change in the lifetime of the core He-burning phase causes a temporary "boost" in the production rate of subsequent evolutionary phases, including the TP-AGB. For a timespan of about 0.1 Gyr, triple TP-AGB branches develop at slightly different initial masses, causing their frequency and contribution to the integrated luminosity of the stellar population to increase by a factor of ~2. The boost occurs for turn-off masses of ~1.75 M ☉, just in the proximity of the expected peak in the TP-AGB lifetimes (for MC metallicities), and for ages of ~1.6 Gyr. Coincidently, this relatively narrow age interval happens to contain the few very massive MC clusters that host most of the TP-AGB stars used to constrain stellar evolution and EPS models. This concomitance makes the AGB-boosting particularly insidious in the context of present EPS models. As we discuss in this paper, the identification of this evolutionary effect brings about three main consequences. First, we claim that present estimates of the TP-AGB contribution to the integrated light of galaxies derived from MC clusters are biased toward too large values. Second, the relative TP-AGB contribution of single-burst populations falling in this critical age range cannot be accurately derived by approximations such as the fuel consumption theorem, which ignore, by construction, the above evolutionary effect. Third, a careful revision of AGB star populations in intermediate-age MC clusters is urgently demanded, promisingly with the aid of detailed sets of stellar isochrones
Interview with Philip Gerard
No full textInterview with Philip Gerard, author and professor of creative writing at UNCW. Here, he discusses his background and education, the founding and structure of UNCW's MFA in Creative Writing program, and the concerns of memoir and creative nonfiction
A policy for Australia. Philip Methven
No full texttag=1 data=A policy for Australia. Philip Methven
tag=2 data=Methven, Philip
tag=3 data=Asia-Pacific Defence Reporter,
tag=4 data=XIX
tag=5 data=8/9
tag=6 data=February/March 1993
tag=7 data=13-19.
tag=8 data=DEFENCE
tag=10 data=The five power defence arrangements and military co-operation among the ASEAN states, the author proposes the development of further bilateral and intra-regional initiatives.
tag=11 data=1993/5/3
tag=12 data=93/0132
tag=13 data=CABThe five power defence arrangements and military co-operation among the ASEAN states, the author proposes the development of further bilateral and intra-regional initiatives
November 21, 2007: Philip Pullman--Author of Hallowed Secularism?
No full textPhilip Pullman--Author of Hallowed Secularism
EVOLUTION of THERMALLY PULSING ASYMPTOTIC GIANT BRANCH STARS. V. CONSTRAINING the MASS LOSS and LIFETIMES of INTERMEDIATE-MASS, LOW-METALLICITY AGB STARS
No full textThermally pulsing asymptotic giant branch (TP-AGB) stars are relatively short lived (less than a few Myr), yet their cool effective temperatures, high luminosities, efficient mass loss, and dust production can dramatically affect the chemical enrichment histories and the spectral energy distributions of their host galaxies. The ability to accurately model TP-AGB stars is critical to the interpretation of the integrated light of distant galaxies, especially in redder wavelengths. We continue previous efforts to constrain the evolution and lifetimes of TP-AGB stars by modeling their underlying stellar populations. Using Hubble Space Telescope (HST) optical and near-infrared photometry taken of 12 fields of 10 nearby galaxies imaged via the Advanced Camera for Surveys Nearby Galaxy Survey Treasury and the near-infrared HST/SNAP follow-up campaign, we compare the model and observed TP-AGB luminosity functions as well as the ratio of TP-AGB to red giant branch stars. We confirm the best-fitting mass-loss prescription, introduced by Rosenfield et al., in which two different wind regimes are active during the TP-AGB, significantly improves models of many galaxies that show evidence of recent star formation. This study extends previous efforts to constrain TP-AGB lifetimes to metallicities ranging -1.59 ≲ [Fe/H] ≲ -0.56 and initial TP-AGB masses up to ∼4 M⊙, which include TP-AGB stars that undergo hot-bottom burning
Motion and mobility in the realist novels of Philip K Dick
No full textThis essay explores the ways that ideas of motion and mobility support readings of Philip K Dick's early novels that take full account of the changing geographical context. They are set during a period of rapid suburban expansion, the building of the interstate and the spread of automobility through car ownership, and their characters frequently exist in a state between continuity through conformity and the potential for change. The open ended forms of the novels reflect a world around Dick that was still under construction, and where alternative realities can be glimpsed between incomplete materialities
Philip Shawcross
No full textPhilip Shawcross has a BA Honours degree from the University of Manchester, a teaching degree and a Masters from the University of Toulouse and a BTS in Translation. He worked as a training consultant within Aeroformation (Airbus Training) from 1972 to 1986 and the Air France Group from 1976 to 2008. He developed his first Aviation English course in 1974 and, with Fiona Robertson, co-founded ICAEA in 1991, being president from 2007 to 2013. He is the author of English for Aircraft (Editions Belin) and Flightpath (CUP). He is still involved in courseware development and teacher training.https://commons.erau.edu/icaea-workshop-images/1006/thumbnail.jp
Philip Livingston to Susannah Kean, April 24, 1795
No full textPhilip Livingston in New York, NY wrote to Susan Kean, addressed to Philadelphia, PA. The author discussed business with Susan and his illness. People included: Morris, Mr. [Thomas].https://digitalcommons.kean.edu/lhc_1790s/1251/thumbnail.jp
Philip Strong letter to Reuben Wood, January 27, 1852
No full textLegal correspondence written by Philip Strong to Governor Reuben Wood regarding a warrant to arrest Peyton Polly, dated January 27, 1852.
Reuben Wood was governor of Ohio from 1850 through 1853, and was closely involved with the Peyton Polly case and attempts to secure the Polly family's release. Peyton Polly and his family were freedmen living in Lawrence County, Ohio, when they were kidnapped on June 6, 1850, and sold back into slavery in Kentucky and Virginia
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