ORCID Profile
0000-0002-5614-0390
Current Organisation
University of South Australia
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Publisher: EDP Sciences
Date: 10-2014
Publisher: Routledge
Date: 07-12-2021
Publisher: Routledge
Date: 07-12-2021
Publisher: Routledge
Date: 11-10-2023
Publisher: Routledge
Date: 13-09-2016
Publisher: SPIE
Date: 24-07-2014
DOI: 10.1117/12.2055826
Publisher: Routledge
Date: 02-03-2015
Publisher: Oxford University PressNew York
Date: 27-03-2003
DOI: 10.1093/0195158989.003.0012
Abstract: Discusses the state of the Philippine environment by studying the trends of available data on environmental quality and natural resource degradation, and comparing them with those of other Asian countries. It then presents a brief review of theoretical links among environment quality, resource depletion, and development strategies and outcomes, considering Philippine data in light of this theory. Recent economic trends and policy initiatives affecting the environment and development are discussed, and simulation results indicating likely trends in economic and environmental variables under alternative policy regimes are presented. The chapter concludes with what past experience and current trends might indicate for the future of the Philippine environment.
Publisher: Routledge
Date: 05-03-2018
Publisher: Informa UK Limited
Date: 11-2013
Publisher: EDP Sciences
Date: 22-02-2013
Publisher: Informa UK Limited
Date: 05-2013
Publisher: Informa UK Limited
Date: 02-09-2020
Publisher: Routledge
Date: 05-03-2018
Publisher: Cambridge University Press
Date: 26-10-2017
Publisher: Informa UK Limited
Date: 11-2006
Publisher: Informa UK Limited
Date: 08-01-2018
Publisher: Routledge
Date: 11-10-2023
Publisher: Informa UK Limited
Date: 10-09-2018
Publisher: Routledge
Date: 11-10-2023
Publisher: Routledge
Date: 11-10-2023
Publisher: EDP Sciences
Date: 02-2020
DOI: 10.1051/0004-6361/201937075
Abstract: The slow ( s ) and intermediate ( i ) neutron ( n ) capture processes occur both in asymptotic giant branch (AGB) stars, and in massive stars. To study the build-up of the s - and i -products at low metallicity, we investigate the abundances of Y, Ba, La, Nd, and Eu in 98 stars, at −2.4 [Fe/H] −0.9, in the Sculptor dwarf spheroidal galaxy. The chemical enrichment from AGB stars becomes apparent at [Fe/H] ≈ −2 in Sculptor, and causes [Y/Ba], [La/Ba], [Nd/Ba] and [Eu/Ba] to decrease with metallicity, reaching subsolar values at the highest [Fe/H] ≈ −1. To investigate in idual nucleosynthetic sites, we compared three n -rich Sculptor stars with theoretical yields. One carbon-enhanced metal-poor (CEMP-no) star with high [Sr, Y, Zr] +0.7 is best fit with a model of a rapidly-rotating massive star, the second (likely CH star) with the i -process, while the third has no satisfactory fit. For a more general understanding of the build-up of the heavy elements, we calculate for the first time the cumulative contribution of the s - and i -processes to the chemical enrichment in Sculptor, and compare with theoretical predictions. By correcting for the r -process, we derive [Y/Ba] s / i = −0.85 ± 0.16, [La/Ba] s / i = −0.49 ± 0.17, and [Nd/Ba] s / i = −0.48 ± 0.12, in the overall s - and/or i -process in Sculptor. These abundance ratios are within the range of those of CEMP stars in the Milky Way, which have either s - or i -process signatures. The low [Y/Ba] s / i and [La/Ba] s / i that we measure in Sculptor are inconsistent with them arising from the s -process only, but are more compatible with models of the i -process. Thus we conclude that both the s - and i -processes were important for the build-up of n -capture elements in the Sculptor dwarf spheroidal galaxy.
Publisher: Routledge
Date: 02-10-2012
Publisher: Palgrave Macmillan UK
Date: 2014
Publisher: Routledge
Date: 02-10-2012
Publisher: Informa UK Limited
Date: 04-2007
Publisher: Routledge
Date: 25-11-2016
No related grants have been discovered for Adam Simpson.