352 research outputs found
A Metic was a Metic
In Classical Athens, an immigrant who stayed longer than about a month was required to register a citizen as prostates and to commence paying the metoikion. So were freed slaves. A recent study treats these freeborn and freedman metics as distinct legal types of resident alien. Athenian law did not
Endowed Eponymous Festivals on Delos
Second-century BC Delos saw the creation of more than two dozen endowments, by men and women, Delians and aliens, and, most famously, Hellenistic royalty or their agents. Scholars agree that these underwrote festivals (mostly eponymous: The Antigoneia, Eutycheia, Philonideia, Ptolemaieia, Stesileia, etc.), and have focused on the political motivation, purpose, and effects of the dozen or so royal specimens. This paper suggests that we have misconstrued the Greek of the Delian accounts; that the endowments did not fund eponymous festivals per se, but modest recurring ritual that was established on the occasion of significant family events, especially marriage and death; that this peculiar Delian phenomenon has more to say about authentic piety than grand politics, and more in common with Hellenistic family cult than festival culture
“Those who live apart” were Mercenaries
Since antiquity, scholars have thought that the phrase τοὺς χωρὶς οἰκοῦντας (Dem. 4.36) indicated a special class of slaves, or freedmen, or (Kazakévich) an unspecified form of free alien. The argument advanced in Dem. 4, this paper suggests, shows that the individuals who lived apart, were mercenaries
Novel magnetic phase in a weakly ordered spin-1/2 chain antiferromagnet SrCuO
We present the magnetic phase diagram of a spin-1/2 chain antiferromagnet
SrCuO studied by ultrasound phase-sensitive detection technique. We
observe an enhanced effect of external magnetic field on the ordering
temperature of the system, which is in the extreme proximity to the quantum
critical point. Inside the N\'eel ordered phase, we detect an additional
field-induced continuous phase transition, which is unexpected for a collinear
Heisenberg antiferromagnet. This transition is accompanied by softening of
magnetic excitation mode observed by electron-spin resonance, which can be
associated with a longitudinal (amplitude) mode of the order parameter in a
weakly-coupled system of spin-1/2 chains. These results suggest transition from
a transverse collinear antiferromagnet to an amplitude-modulated spin density
wave phase induced by magnetic field.Comment: 4 pages, 4 figure
The Construction of Conforming-to-shape Truss Lattice Structures via 3D Sphere Packing
Truss lattices are common in a wide variety of engineering applications, due to their high ratio of strength versus relative density. They are used both as the interior support for other structures, and as structures on their own. Using 3D sphere packing, we propose a set of methods for generating truss lattices that fill the interior of B-rep models, polygonal or (trimmed) NURBS based, of arbitrary shape. Once the packing of the spheres has been established, beams between the centers of adjacent spheres are constructed, as spline based B-rep geometry. We also demonstrate additional capabilities of our methods, including connecting the truss lattice to (a shell of) the B-rep model, as well as constructing a tensor-product trivariate volumetric representation of the truss lattice - an important step towards direct compatibility for analysis.RYC-2017-2264
Fission half-lives of super-heavy nuclei in a microscopic approach
A systematic study of 160 heavy and super-heavy nuclei is performed in the
Hartree-Fock-Bogoliubov approach with the finite range and density dependent
Gogny force with the D1S parameter set. We show calculations in several
approximations: with axially symmetric and reflexion symmetric wave functions,
with axially symmetric and non-reflexion symmetric wave functions and finally
some representative examples with triaxial wave functions are also discussed.
Relevant properties of the ground state and along the fission path are
thoroughly analyzed. Fission barriers, Q-factors and lifetimes with
respect to fission and -decay as well as other observables are
discussed. Larger configuration spaces and more general HFB wave functions as
compared to previous studies provide a very good agreement with the
experimental data.Comment: 26 pages, 15 figure
Spin-Vacancy-Induced Long-Range Order in a New Haldane-Gap Antiferromagnet
Magnetic susceptibility, high-field magnetization and inelastic neutron
scattering experiments are used to study the magnetic properties of a new S=1
quasi-1-dimensional antiferromagnet PbNi2V2O8. Inter-chain interactions are
shown to be almost, but not quite, strong enough to destroy the nonmagnetic
singlet ground state and the energy gap in the magnetic excitation spectrum.
Substituting nonmagnetic Mg (S=0) ions for Ni (S=1) induces a
magnetically ordered state at low temperatures. To our knowledge this is the
first observation of doping-induced long-range order in a Haldane-gap system.Comment: 5 pages including 4 figure
Left Ventricular Systolic Dysfunction in Rheumatoid Disease An Unrecognized Burden?
ObjectivesThis study sought to ascertain whether left ventricular systolic dysfunction (LVSD) is more common among clinic patients with rheumatoid disease (RD) compared with the general population, and to assess the diagnostic utility of brain natriuretic peptide (BNP).BackgroundPatients with RD are at increased risk of ischemic heart disease. However, there are few large echocardiographic studies identifying cardiac dysfunction in RD. We hypothesized that LVSD would be more prevalent in RD patients than in the general population.MethodsA total of 226 hospital out-patients with RD (65% women) underwent clinical evaluation, electrocardiography (ECG), echocardiography, and plasma BNP assay (218 patients). Prevalence of LVSD was compared with local population estimates.ResultsDefinite LVSD (left ventricular ejection fraction <40%) occurred in 5.3% of the RD group: standardized prevalence ratio, 3.20; 95% confidence interval, 1.65 to 5.59. Median BNP values were higher in patients with LVSD compared with those without: 16.6 pmol/l versus 8.5 pmol/l, p < 0.005, although values between the two groups overlapped. One in nine patients with an abnormal ECG had definite LVSD.ConclusionsDefinite LVSD was three times more common in RD patients than in the general population. Given the prognostic benefits of treating LVSD, echocardiographic screening of RD patients with an abnormal ECG may be worthwhile
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