Is the Y (2175) a Strangeonium Hybrid Meson?

QCD Gaussian sum rules are used to explore the vector (JPC=1−−) strangeonium hybrid interpretation of the Y(2175). Using a two-resonance model consisting of the Y(2175) and an additional resonance, we find that the relative resonance strength of the Y(2175) in the Gaussian sum rules is less than 5% that of a heavier 2.9 GeV state. This small relative strength presents a challenge to a dominantly hybrid interpretation of the Y(2175)

Introducción. El Placer en la Edad Media: artículos presentados en el 2013 International Medieval Congress, Leeds.

No disponible en català. Vegeu resum en anglèsThe papers in this edition of Mirabilia are derived from presentations at the 2013 Leeds International Medieval Congress (IMC). As a large gathering of scholars, the largest of its kind in Europe, with numerous sessions for short presentations, the IMC has proved an ideal forum for early career scholars. Many a young scholar, from both hemispheres and from every continent, has presented her or his first international paper at Leeds. But it is not only a forum for young scholars. Established academics come every year, presenting new ideas alongside their peers: as can be seen in the following collection

Role-Playing: A Smorgasbord of Learning Types

One tertiary institution sought to research the perceptions that tertiary students have of role-plays as a means of learning. Role-plays were used across a range of disciplines at that institution including: teacher training, business and chemistry. Each of these disciplines used a role-play in their classes and then collected opinions from the students on the usefulness of the activity. It was discovered that students value role-plays as a means to challenge preconceived ideas, encourage creative thinking, assist students in applying theory to practice, make lessons fun and provide active learning experiences that increase student learning and engagement

Conductivity of Strongly Coupled Striped Superconductor

We study the conductivity of a strongly coupled striped superconductor using gauge/gravity duality (holography). The study is done analytically, in the large modulation regime. We show that the optical conductivity is inhomogeneous but isotropic at low temperatures. Near but below the critical temperature, we calculate the conductivity analytically at small frequency \omega, and find it to be both inhomogeneous and anisotropic. The anisotropy is imaginary and scales like 1/\omega. We also calculate analytically the speed of the second sound and the thermodynamic susceptibility.Comment: 32 page

Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739

We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of M sin i = 4.96 M_Jup and is orbiting the G3 IV star HD154672 with an orbital period of 163.9 days. The second planet is orbiting the F7 V star HD205739 with an orbital period of 279.8 days and has a mass of M sin i = 1.37 M_Jup. Both planets are in eccentric orbits, with eccentricities e = 0.61 and e = 0.27, respectively. Both stars are metal rich and appear to be chromospherically inactive, based on inspection of their Ca II H and K lines. Finally, the best Keplerian model fit to HD205739b shows a trend of 0.0649 m/s/day, suggesting the presence of an additional outer body in that system.Comment: 16 pages, 5 figures, accepted for publication on A

Simultaneous determination of natural and synthetic steroid estrogens and their conjugates in aqueous matrices by liquid chromatography / mass spectrometry

An analytical method for the simultaneous determination of nine free and conjugated steroid estrogens was developed with application to environmental aqueous matrices. Solid phase extraction (SPE) was employed for isolation and concentration, with detection by liquid chromatography/mass spectrometry (LC/MS) using electrospray ionisation (ESI) in the negative mode. Method recoveries for various aqueous matrices (wastewater, lake and drinking water) were determined, recoveries proving to be sample dependent. When spiked at 50 ng/l concentrations in sewage influent, recoveries ranged from 62-89 % with relative standard deviations (RSD) < 8.1 %. In comparison, drinking water spiked at the same concentrations had recoveries between 82-100 % with an RSD < 5%. Ion suppression is a known phenomenon when using ESI; hence its impact on method recovery was elucidated for raw sewage. Both ion suppression from matrix interferences and the extraction procedure has bearing on the overall method recovery. Analysis of municipal raw sewage identified several of the analytes of interest at ng/l concentrations, estriol (E3) being the most abundant. Only one conjugate, estrone 3-sulphate (E1-3S) was observe

The new scalar politics of evaluation: An emerging governance role for evaluation

In this article we analyze how roles for evaluation are described and argued for in key texts produced and/or promoted by three influential international networks: the High Level Forum on Aid Effectiveness; the Organisation for Economic Cooperation and Development Assistance Committee’s Network on Development Evaluation; and the Network of Networks for Impact Evaluation. We contend that these complex multilateral networks are working supranationally through soft power to promote: common standards of evaluation practice; a dominant model of evaluation (impact evaluation); and new evaluation roles, relationships and practices for the field of development. Moreover, we argue that this emerging complex multilateral agenda for evaluation may position evaluation and evaluators within a global governance strategy allowing greater influence to international development organizations. We conclude with a discussion of the implications of the analysis for evaluators working in the field of international development

Response to treatment in a prospective national infantile spasms cohort

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/134499/1/ana24594.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/134499/2/ana24594_am.pd