3,198 research outputs found
Changes in body composition and fatty acid profile during embryogenesis of quillback rockfish (Sebastes maliger)
We investigated developmental changes in the body compositions and fatty acid (FA) profiles of embryos and preparturition larvae of the quillback rockfish (Sebastes
maliger). Comparisons of proximate composition data from early-stage embryos with data from hatched preparturition larvae taken from wild-caught gravid females indicated
that embryos gain over one-third their weight in moisture while consuming 20% of their dry tissue mass for energy as they develop into larvae. Lipid contributed 60% of the
energy consumed and was depleted more rapidly than protein, indicating a protein-sparing effect. Oil globule volume was strongly correlated with lipid levels, affirming its utility as an indicator of energetic status. FA profiles of early embryos differed significantly from those of hatched
larvae. Differences in the relative abundances of FAs between early embryos and hatched larvae indicated
different FA depletion rates during embryonic development. We conclude that some metabolically important FAs may prove useful in assessing the condition of embryos and preparturition larvae, particularly 20:4n-6, which cannot be synthesized by many marine fish and which is conserved
during embryogenesis. Variability in body composition and energy use among rockfish species should be considered when interpreting any measures of condition
Competition, efficiency and collective behavior in the "El Farol" bar model
The El Farol bar model, proposed to study the dynamics of competition of
agents in a variety of contexts (W. B. Arthur, Amer. Econ. Assoc. Pap. and
Proc. 84, 406 (1994)) is studied. We characterize in detail the three regions
of the phase diagram (efficient, inefficient and better than random) of the
simplest version of the model (D. Challet and Y.-C. Zhang, Physica A, 246, 407
(1997)). The efficient region is shown to have a rich structure, which is
investigated in some detail. Changes in the payoff function enhance further the
tendency of the model towards a wasteful distribution of resources.Comment: 7 pages Latex, 7 Postscript figures; changed reference,
acknowledgments included. Accepted for publication in Europen Physics Journal
Surprise, Hope and Gift: A Pneumatological Account of the Unexpected Nature of Vocation
God's call can be surprising and unexpected. This article evaluates theologies of vocation in light of this potential for surprise. Contemporary Protestant theological interpretations of vocation are critiqued as incomplete due to their tendency to present vocation as the expression and utilisation of innate abilities without giving sufficient account of how an individual might be called to something totally new and surprising. It will be suggested that this arises from a focus on creation as the dominant theological lens for interpreting vocation. An alternative focused on eschatology and pneumatology will be proposed in which both natural talents and new abilities are recognised as gifts of the Spirit given for the purpose of anticipatory proleptic participation in the coming Kingdom of God
Margie Shumate : a Virginia Missionary\u27s experience in Asia, 1915-1958
In 1915 Virginia missionary Miss Margie Shumate arrived in Shiu Hing in the South China Mission of the Southern Baptist Convention. Until the Communists forced her to leave, Miss Shumate served the Chinese with complete devotion, surviving political problems, social upheavals, and difficulties that most would not even want to imagine. Although the transition to a new field was difficult, Miss Shumate served first in Hong Kong and then in Thailand before her 1958 retirement. Unable to imagine life without the Chinese and mission work, Miss Shumate died soon after her retirement. Hers is story of adaptation, acceptance, and determination. Her life story adds to the growing body of literature on foreign missionary work, especially on missionaries in Asia in the first half of the twentieth century, and further explains the work of the Foreign Mission Board of the Southern Baptist Convention
MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. IV. The Parent Luminosity Function of Radio-Loud Blazars
(Abridged) We use a complete sample of active galactic nuclei (AGN) selected
on the basis of relativistically beamed 15 GHz radio flux density to derive the
parent radio luminosity function (RLF) of bright radio-selected blazar cores.
We use a maximum likelihood method to fit a beamed RLF to the observed data and
thereby recover the parameters of the intrinsic (unbeamed) RLF. We analyze two
subsamples of the MOJAVE sample: the first contains only objects of known FR II
class, with a total of 103 sources, and the second subsample adds 24 objects of
uncertain FR class for a total of 127 sources. Both subsamples exclude four
known FR I radio galaxies and two gigahertz-peaked spectrum sources. We obtain
good fits to both subsamples using a single power law intrinsic RLF with pure
density evolution function. We find that a previously reported break in the
observed MOJAVE RLF actually arises from using incomplete bins (because of the
luminosity cutoff) across a steep and strongly evolving RLF, and does not
reflect a break in the intrinsic RLF. The derived space density of the parent
population of the FR II sources from the MOJAVE sample (with L>1.3e25 W/Hz) is
approximately 1600/Gpc^3.Comment: 31 pages, 7 figures and 2 tables. Accepted for publication in ApJ.
Changes: classification of sources based on radio morphology instead of
optical classes; added the parameters of the RLF of the FR II sources; added
more explanations; added a table listing the sample sources; added 2 extra
figures related to the observed break in the RLF; updated reference
Global Learning in England: Baseline analysis of the Global Learning Programme Whole School Audit 2013–14
The GLP-E is an initiative aimed at supporting the teaching and learning of global learning in schools in England at Key Stage 2 and Key Stage 3. It is a five-year national programme of support to schools to enhance their provision of global learning. Specifically, the GLP-E works with teachers to enhance their confidence and ability to provide whole school support to global learning across their institutions. The GLP-E has a strong emphasis on research and evaluation, in particular using research evidence to support the development of better practice in the programme.The Whole School Audit (WSA) is an online data-gathering tool that respondents in participating schools complete after registering onto the GLP-E. This paper presents findings from the baseline analysis of WSA submissions for schools joining the GLP-E between June 2013 and February 2014. Specifically, the paper responds to four key questions: 1. Which schools are signing up for the GLP-E? 2. Why are schools signing up for the GLP-E? 3. What global learning activities are schools signing up to the GLP-E already involved in? 4. What are levels of global learning in schools signing up to the GLP-E
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