28,023 research outputs found
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Writing Yourself In? The Price of Playing the (Feminist) Game in the Neoliberal University
Do financial incentives increase treatment adherence in people with severe mental illness? A systematic review
Published by CUP from 2011. Publisher version available from: http://journals.cambridge.org/action/displayJournal?jid=EP
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Efficacy of metabarcoding for identification of fish eggs evaluated with mock communities.
There is urgent need for effective and efficient monitoring of marine fish populations. Monitoring eggs and larval fish may be more informative than that traditional fish surveys since ichthyoplankton surveys reveal the reproductive activities of fish populations, which directly impact their population trajectories. Ichthyoplankton surveys have turned to molecular methods (DNA barcoding & metabarcoding) for identification of eggs and larval fish due to challenges of morphological identification. In this study, we examine the effectiveness of using metabarcoding methods on mock communities of known fish egg DNA. We constructed six mock communities with known ratios of species. In addition, we analyzed two samples from a large field collection of fish eggs and compared metabarcoding results with traditional DNA barcoding results. We examine the ability of our metabarcoding methods to detect species and relative proportion of species identified in each mock community. We found that our metabarcoding methods were able to detect species at very low input proportions; however, levels of successful detection depended on the markers used in amplification, suggesting that the use of multiple markers is desirable. Variability in our quantitative results may result from amplification bias as well as interspecific variation in mitochondrial DNA copy number. Our results demonstrate that there remain significant challenges to using metabarcoding for estimating proportional species composition; however, the results provide important insights into understanding how to interpret metabarcoding data. This study will aid in the continuing development of efficient molecular methods of biological monitoring for fisheries management
Geodesic systems of tunnels in hyperbolic 3-manifolds
It is unknown whether an unknotting tunnel is always isotopic to a geodesic
in a finite volume hyperbolic 3-manifold. In this paper, we address the
generalization of this problem to hyperbolic 3-manifolds admitting tunnel
systems. We show that there exist finite volume hyperbolic 3-manifolds with a
single cusp, with a system of at least two tunnels, such that all but one of
the tunnels come arbitrarily close to self-intersecting. This gives evidence
that systems of unknotting tunnels may not be isotopic to geodesics in tunnel
number n manifolds. In order to show this result, we prove there is a
geometrically finite hyperbolic structure on a (1;n)-compression body with a
system of core tunnels such that all but one of the core tunnels
self-intersect.Comment: 19 pages, 4 figures. V2 contains minor updates to references and
exposition. To appear in Algebr. Geom. Topo
Ks-band (2.14 micron) imaging of southern massive star formation regions traced by methanol masers
We present deep, wide-field, Ks-band (2.14 micron) images towards 87 southern
massive star formation regions traced by methanol maser emission. Using
point-spread function fitting, we generate 2.14 micron point source catalogues
towards each of the regions. For the regions between 10 degrees and 350 degrees
galactic longitude and galactic latitude +/- 1 degree, we match the 2.14 micron
sources with the GLIMPSE point source catalogue to generate a combined 2.14 to
8.0 micron point source catalogue. We provide this data for the astronomical
community to utilise in studies of the stellar content of embedded clusters.Comment: Accepted PASA. Full version including figures available from
http://www.cfa.harvard.edu/~slongmor/snl_iris2_withfigs.pd
Do Start-Ups Pay Less?
The authors analyze Danish registry data from 1991 to 2006 to determine how firm age and firm size influence wages. Unadjusted statistics suggest that smaller firms paid less than larger firms paid, and that firm age had little or no bearing on wages. After adjusting for differences in the characteristics of employees hired by these firms, however, they observe both firm age and firm size effects. Larger firms paid more than did smaller firms for observationally equivalent individuals but, contrary to conventional wisdom, younger firms paid more than older firms. The size effect, however, dominates the age effect. Thus, although the typical start-up — being both young and small — paid less than a more established employer, the largest start-ups paid a wage premium
First Principles Calculations of Ionic Vibrational Frequencies in PbMg1/3Nb2/3O3
Lattice dynamics for several ordered supercells with composition
PbMg1/3Nb2/3O (PMN) were calculated with first-principles frozen phonon
methods. Nominal symmetries of the supercells studied are reduced by lattice
instabilities. Lattice modes corresponding to these instabilities, equilibrium
ionic positions, and infrared (IR) reflectivity spectra are reported.Comment: 6 pages; Fundamental physics of Ferroelectrics 200
Integrating Theory and Practice Into the Professional Responsibility Curriculum at the University of Texas
Teaching ethics to large classes has always proved to be a great challenge for those who teach professional responsibility at the University of Texas. A new program at the University of Texas to improve the professional responsibility curriculum is discussed
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