A Spectral Line Survey from 138.3 to 150.7 GHZ toward Orion-KL

We present the results of a spectral line survey from 138.3 to 150.7 GHz toward Orion-KL. The observations were made using the 14 m radio telescope of Taeduk Radio Astronomy Observatory. Typical system temperatures were between 500 and 700 K, with the sensitivity between $0.02 - 0.06$ K in units of $\rm T_A^*$. A total of 149 line spectra are detected in this survey. Fifty lines have been previously reported, however we find 99 new detections. Among these new lines, 32 are `unidentified', while 67 are from molecular transitions with known identifications. There is no detection of H or He recombination lines. The identified spectra are from a total of 16 molecular species and their isotopic variants. In the range from 138.3 to 150.7 GHz, the strongest spectral line is the J=3-2 transition of CS molecule, followed by transitions of the $\rm H_2CO$, $\rm CH_3OH$, $\rm CH_3CN$, and $\rm SO_2$. Spectral lines from the large organic molecules such as $\rm CH_3OH$, $\rm CH_3OCH_3$, $\rm HCOOCH_3$, $\rm C_2H_5CN$ and $\rm CH_3CN$ are prominent; with 80 % of the identified lines arising from transitions of these molecules. The rotational temperatures and column densities are derived using the standard rotation diagram analysis for $\rm CH_3OH$ ($\rm ^{13}CH_3OH$), $\rm HCOOCH_3$, $\rm CH_3CN$ and $\rm SO_2$ with $\rm 10\sim 270 K$ and $\rm 0.2\sim 20\times 10^{15} cm^{-2}$. These estimates are fairly comparable to the values for the same molecule in other frequency regions by other studies.Comment: 10 figures, 2 tex files for a manuscript and tables, accepted to Ap

Common climatic signal from glaciers in the European Alps over the last 50 years

Conventional glacier-wide mass balances are commonly used to study the effect of climate forcing on glacier melt. Unfortunately, the glacier-wide mass balances are also influenced by the glacier's dynamic response. Investigations on the effects of climate forcing on glaciers can be largely improved by analyzing point mass balances. Using a statistical model, we have found that 52% of the year-to-year deviations in the point mass balances of six glaciers distributed across the entire European Alps can be attributed to a common variability. Point mass balance changes reveal remarkable regional consistencies reaching 80% for glaciers less than 10 km apart. Compared to the steady state conditions of the 1962–1982 period, the surface mass balance changes are −0.85 m water equivalent (w.e.) a⁻¹ for 1983–2002 and −1.63 m w.e. a⁻¹ for 2003–2013. This indicates a clear and regionally consistent acceleration of mass loss over recent decades over the entire European Alps

Negotiating employability: migrant capitals and networking strategies for Zimbabwean highly skilled migrants in the UK

In this paper we focus on highly skilled migration from Zimbabwe to the UK, exploring these migrants’ social capital sources/structures and content. In doing so we pay attention to routes of migration and how they shape migrants’ networking capabilities and patterns. We further take a Bourdieusian perspective and explore the intersection between social capital and cultural capital in the process of migrants’ negotiation of employment opportunities, giving closer attention to how the distinctive habitus associated with being highly skilled migrants from Zimbabwe shape migrants’ attitudes towards work. By exploring the interplay between external processes and internalised structures, we bring to the fore the multiple positioning of our participants, who we see not as simply depending on social networks, but as complex actors whose negotiation of employability in the UK is shaped by various factors including intersecting aspects of differentiation

Immigration, Social Networks, and the Emergence of Ethnic Segmentation in a Low-Skill Labor Market

© The Author(s) 2018. Postwar migration to “western” countries has gone hand in hand with the development of ethnically segmented labor markets, particularly in low-skill roles where entry requirements are minimal. While numerous theories have been forwarded as to why such situations occur, it has remained difficult to empirically test the relative impact of the many interacting processes that produce segmentation in the labor market. In this article, we investigate the processes of ethnic segmentation in low-skilled labor markets, where referral hiring is the norm, with particular reference to the role of ethnically homogeneous social networks and forms of discrimination. We employ an agent-based modeling approach, adapting key elements from Waldinger and Lichter’s widely cited networked explanation of ethnic labor market segmentation. This approach allows us to provide a different lens on theories of ethnic labor market segmentation, investigating the relative impacts of different causal processes that are difficult to investigate in this way using other social science approaches. The overall results from our model indicate that ethnically homogeneous social networks have the effect of increasing the level of ethnic segmentation within a referral-based labor market, but that these networks also help immigrant populations grow and protect them from the negative impacts of employer discrimination. Furthermore, these networks have a greater impact on labor market segmentation than discrimination alone. In conclusion, this sociologically informed agent-based model provides important insights into the manner and extent in which changes in social conditions may affect population-level phenomena

A critical praxis in the information literacy education classroom using the ACRL Framework for Information Literacy for Higher Education

The University of the Western Cape Library uses the ACRL Framework for Information Literacy for Higher Education to introduce an alternative, nuanced approach to information literacy training by transforming librarians’ teaching praxis. The Framework presents a new perspective on teaching and learning and is built around six frames, each consisting of a threshold concept which is central to information literacy. To this end, the Library coordinated the Information Literacy Programme for the University’s Library and Information Science Department. By using a qualitative approach, this case study describes the integration of the Framework in the Information Literacy Education module to teach prospective librarians to internalise the core concepts of the Framework. The paper discusses how the Framework was operationalised to enhance students’ critical thinking through the application of formative and summative assessments and a number of student artifacts

Follow-up assessment of high-risk newborns in Switzerland

Target population High-risk newborns in the context of these guidelines are children who were born very preterm (before 32 weeks gestational age) or children who developed a ypoxic ischaemic encephalopathy (Sarnat grade 2–3) during the first hours of life