Qualification Structure, Over- and Underqualification of the Foreign Born in Austria and the EU

This project focuses on comparing the qualification structure of migrants residing in Austria as well as their over- and underqualification rates to other EU countries. The skill structure of foreign born residing in Austria has improved slightly in the last years. Austria is, however, characterised by a high share of medium skilled migrants and a low share of highly skilled migrants. In addition among the pool of migrants in the EU from a given country, Austria generally selects the less qualified. The location decisions of highly skilled migrants are mostly governed by income opportunities, labour market conditions, ethnic networks and a common official language. Over- and under-qualification rates among the foreign born in Austria largely accord with the European average, the largest part of the differences can be explained by differences in qualification and country structure between the foreign born in Austria and the EU. Native-foreign born differentials in employment rates are, however, significantly higher in Austria than in other EU countries.Migration, Migration Policy, Migrant Skill Structure, Integration

Evidence for Environmental Changes in the Submillimeter Dust Opacity

The submillimeter opacity of dust in the diffuse interstellar medium (ISM) in the Galactic plane has been quantified using a pixel-by-pixel correlation of images of continuum emission with a proxy for column density. We used multi-wavelength continuum data: three Balloon-borne Large Aperture Submillimeter Telescope bands at 250, 350, and 500 μm and one IRAS band at 100 μm. The proxy is the near-infrared color excess, E(J – K_s), obtained from the Two Micron All Sky Survey. Based on observations of stars, we show how well this color excess is correlated with the total hydrogen column density for regions of moderate extinction. The ratio of emission to column density, the emissivity, is then known from the correlations, as a function of frequency. The spectral distribution of this emissivity can be fit by a modified blackbody, whence the characteristic dust temperature T and the desired opacity σ_e(1200) at 1200 GHz or 250 μm can be obtained. We have analyzed 14 regions near the Galactic plane toward the Vela molecular cloud, mostly selected to avoid regions of high column density (N_H > 10^(22) cm^(–2)) and small enough to ensure a uniform dust temperature. We find σ_e(1200) is typically (2-4) × 10^(–25) cm^2 H^(–1) and thus about 2-4 times larger than the average value in the local high Galactic latitude diffuse atomic ISM. This is strong evidence for grain evolution. There is a range in total power per H nucleon absorbed (and re-radiated) by the dust, reflecting changes in the strength of the interstellar radiation field and/or the dust absorption opacity. These changes in emission opacity and power affect the equilibrium T, which is typically 15 K, colder than at high latitudes. Our analysis extends, to higher opacity and lower temperature, the trend of increasing σ_e(1200) with decreasing T that was found at high latitudes. The recognition of changes in the emission opacity raises a cautionary flag because all column densities deduced from dust emission maps, and the masses of compact structures within them, depend inversely on the value adopted

Measuring Hidden Higgs and Strongly-Interacting Higgs Scenarios

Higgs couplings can be affected by physics beyond the Standard Model. We study modifications through interactions with a hidden sector and in specific composite Higgs models accessible at the LHC. Both scenarios give rise to congruent patterns of universal, or partially universal, shifts. In addition, Higgs decays to the hidden sector may lead to invisible decay modes which we also exploit. Experimental bounds on such potential modifications will measure the concordance of an observed Higgs boson with the Standard Model.Comment: 12 pages, 7 figures; version to be published in Phys. Lett.

An Empirical Approach to Cosmological Galaxy Survey Simulation: Application to SPHEREx Low-Resolution Spectroscopy

Highly accurate models of the galaxy population over cosmological volumes are necessary in order to predict the performance of upcoming cosmological missions. We present a data-driven model of the galaxy population constrained by deep 0.1-8 $\rm \mu m$ imaging and spectroscopic data in the COSMOS survey, with the immediate goal of simulating the spectroscopic redshift performance of the proposed SPHEREx mission. SPHEREx will obtain over the full-sky $R\sim41$ spectrophotometry at moderate spatial resolution ($\sim6"$) over the wavelength range 0.75-4.18 $\rm \mu m$ and $R\sim135$ over the wavelength range 4.18-5 $\rm \mu m$. We show that our simulation accurately reproduces a range of known galaxy properties, encapsulating the full complexity of the galaxy population and enables realistic, full end-to-end simulations to predict mission performance. Finally, we discuss potential applications of the simulation framework to future cosmology missions and give a description of released data products

The contribution of Dennis P. Gordon to the understanding of New Zealand Bryozoa

​Few biologists have had such an impact on the understanding of New Zealand biodiversity as Dr Dennis Preston Gordon (1944 – ) (Figure 1). His canon of more than 170 scientific publications covers the full gamut of biodiversity studies, ranging from taxonomy and systematics, ecology, evolution and life history, to large-scale syntheses of regional and global patterns, and the higher order of classification of all living organisms. In the 1990s, as project leader of the taxonomy programme at NIWA, Dennis became increasingly involved in tackling the overarching challenges facing biodiversity science1. His work in this area has informed research and environmental management decision-making in New Zealand and elsewhere. He became an advocate for the organisational infrastructure, networks and databases, required to understand and wisely manage the great menagerie of life on Earth. In this capacity he played many key roles at an international level. Dennis chaired the Species 2000 Asia-Oceania Working Group, and served on the Ocean Biogeographic Information System (OBIS) International Committee and on the Steering Committee of WoRMS, the World Register of Marine Species. Dennis Gordon’s magnum opus is the New Zealand Inventory of Biodiversity – a momentous, three-volume work2. Its brief was to inventory all species known to exist – or to have existed – in all of New Zealand’s terrestrial and aquatic environments over the last half billion years. After a decade of sustained scholarship and organisation (the Inventory has 237 authors from 19 countries), it is a resource that the entire nation can take pride in. No other country has produced a similar document. To a different, smaller and more dispersed community, Dennis wears a different hat. He is one of the world’s leading bryozoan biologists and taxonomists. His contribution to under-standing of this phylum in New Zealand and beyond has been immense. This article describes the bryozoological legacy (so far) of Dr Dennis Preston Gordon

Proposal for International Agreement on Ca Notation resulting from discussion at workshops on stable isotope measurement held in Davos (Goldschmidt 2002) and Nice (EGS-AGU-EUG 2003)

A proposal is made to standardise the reporting of Ca isotope data to the δ44Ca/40Ca notation (or δ44Ca/42Ca) and to adopt NIST SRM 915a as the reference standard