2,757 research outputs found
That People Might Not Say There Are Two Deities The Meaning of Gender in Modern and Biblical Tradition
The biblical doctrine “male and female He created them” describes human nature as fundamentally differentiated and so resistant to any form of homogenous, univocal, political rule. Because of this, the biblical narrative concerning the human person in his/her sexual difference is a story of resistance to tyranny and, ultimately, to idolatry. To see sexual difference as it is described in the Scriptures (and as a fundamental attitude of those influenced by the Scriptures) it is necessary to distinguish this meaning from current, institutional definitions of gender and gender identity. These do not describe a substantively differentiated human being, but a metaphysically androgynous human being. The biblical narrative anticipates this presumption made by modern theories of gender, describing it as a key mechanism of tyranny and offering strategies for resistance
New Non-Diagonal Singularity-Free Cosmological Perfect-Fluid Solution
We present a new non-diagonal G2 inhomogeneous perfect-fluid solution with
barotropic equation of state p=rho and positive density everywhere. It
satisfies the global hyperbolicity condition and has no curvature singularity
anywhere. This solution is very simple in form and has two arbitrary constants.Comment: Latex, no figure
Reactivity of a Cl-boratabenzene Pt(II) complex with Lewis bases : generation of the kinetically favoured Cl-boratabenzene anion
Complex [(IMes)2Pt(H)(ClBC5H4SiMe3)] (IMes = 1,3-di(2,4,6-trimethylphenyl)imidazolin-2-ylidene) reacts with Lewis bases (L = pyridine, trimethylphosphine, acetonitrile, tert-butylisocyanide) to generate the kinetically favoured ion pairs [(IMes)2Pt(H)(L)][ClBC5H4SiMe3]. Over time, the formation of the thermodynamically favoured borabenzene-L adducts is observed with L = pyridine and trimethylphosphine
Quasi-nuclear and quark model baryonium: historical survey
We review ideas and speculations concerning possible bound states or
resonances coupled to the nucleon-antinucleon channel.Comment: 7 pages, no figure, Latex with espcrc2.sty, Talk at QCD99,
Montpellier, France, July 1999, to appear in the Proceedings, ed. S. Nariso
Light and heavy multiquark spectroscopy
The dynamics of multiquark binding is revisited in the light of the recent
experimental results. It is emphasized that some configurations mixing light
and heavy flavours are among the most favourable for stable or metastable
multiquarks. The nuclear-physics type of approach predicting the so-called
hadron-hadron molecules is compared to direct studies in terms of quark
interaction.Comment: Invited talk at QCD05, 12th International QCD Conference, July 4-9,
2005 - Montpellier (France), to appear in the proceedings edited by S.
Nariso
Catecholamine Training Effects from Exercise Programs: A Bridge to Exercise-Temperament Relationships
Three studies were conducted to test whether a catecholamine training effect results from a long-term aerobic exercise program. Study 1 showed significant increases in urinary adrenaline and noradrenaline following moderate mental stress/challenge for male aerobics subjects after a semester of training. Control groups of nonexercisers and continuously in-condition marathoners showed no comparable pre- to post semester catecholamine increases. Male and female Aerobics subjects were contrasted with nonexercisers across a semester in Study 2; the hypothesis was confirmed that postsemester increases in catecholamines occurred only following an episode of mental challenges/stress, and not following base-rate-rest conditions. Under conditions of more active challenge than in Studies 1 and 2, women subjects in Study 3 provided directional but nonsignificant support for the Study 2 findings. The results are discussed in the context of literature on the relationship of catecholamine availability during challenge/ stress to temperament and on the relationship of aerobic training to temperament. At a theoretical level, the question is discussed of increased catecholamine availability being a likely mediator in the exercise program to temperament relationship
How Good a Clock is Rotation? The Stellar Rotation-Mass-Age Relationship for Old Field Stars
The rotation-mass-age relationship offers a promising avenue for measuring
the ages of field stars, assuming the attendant uncertainties to this technique
can be well characterized. We model stellar angular momentum evolution starting
with a rotation distribution from open cluster M37. Our predicted
rotation-mass-age relationship shows significant zero-point offsets compared to
an alternative angular momentum loss law and published gyrochronology
relations. Systematic errors at the 30 percent level are permitted by current
data, highlighting the need for empirical guidance. We identify two fundamental
sources of uncertainty that limit the precision of rotation-based ages and
quantify their impact. Stars are born with a range of rotation rates, which
leads to an age range at fixed rotation period. We find that the inherent
ambiguity from the initial conditions is important for all young stars, and
remains large for old stars below 0.6 solar masses. Latitudinal surface
differential rotation also introduces a minimum uncertainty into rotation
period measurements and, by extension, rotation-based ages. Both models and the
data from binary star systems 61 Cyg and alpha Cen demonstrate that latitudinal
differential rotation is the limiting factor for rotation-based age precision
among old field stars, inducing uncertainties at the ~2 Gyr level. We also
examine the relationship between variability amplitude, rotation period, and
age. Existing ground-based surveys can detect field populations with ages as
old as 1-2 Gyr, while space missions can detect stars as old as the Galactic
disk. In comparison with other techniques for measuring the ages of lower main
sequence stars, including geometric parallax and asteroseismology,
rotation-based ages have the potential to be the most precise chronometer for
0.6-1.0 solar mass stars.Comment: For a brief video explaining the key results of this paper, see
http://www.youtube.com/user/OSUAstronom
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