Strange particle production in proton-proton collisions at s=0.9\sqrt{s}=0.9 TeV with ALICE at the LHC

The production of mesons containing strange quarks (K$^0_s$, $\phi$) and both singly and doubly strange baryons ($\Lambda$, Anti-$\Lambda$, and $\Xi$+Anti-$\Xi$) are measured at central rapidity in pp collisions at $\sqrt{s}$ = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at central rapidities for inelastic pp collisions are presented. For mesons, we report yields () of 0.184 $\pm$ 0.002 stat. $\pm$ 0.006 syst. for K$^0_s$ and 0.021 $\pm$ 0.004 stat. $\pm$ 0.003 syst. for $\phi$. For baryons, we find = 0.048 $\pm$ 0.001 stat. $\pm$ 0.004 syst. for $\Lambda$, 0.047 $\pm$ 0.002 stat. $\pm$ 0.005 syst. for Anti-$\Lambda$ and 0.0101 $\pm$ 0.0020 stat. $\pm$ 0.0009 syst. for $\Xi$+Anti-$\Xi$. The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.Comment: 33 pages, 21 captioned figures, 10 tables, authors from page 28, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/387

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We show that when an N=2 SCFT flows to an N=1 SCFT via giving a mass to the adjoint chiral superfield in a vector multiplet with marginal coupling, the central charges a and c of the N=2 theory are related to those of the N=1 theory by a universal linear transformation. In the large N limit, this relationship implies that the central charges obey a_IR/a_UV=c_IR/c_UV=27/32. This gives a physical explanation to many examples of this number found in the literature, and also suggests the existence of a flow between some theories not previously thought to be connected.Comment: 3 pages. v2: references added, minor typos correcte

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Management objectives of some revegetation plantings encourage the use of native species. Where reinstatement of a native flora is desired, the inclusion of suitable native materials can hasten the process. Further, properly adapted native plants may provide a persistent, winterhardy cover requiring little management. The use of poorly adapted introduced grasses can result in stand decimation, such as that experienced along southcentral Alaska’s roadsides after the severe winter of 1975-1976 (Klebesadel, 1977). Tests have revealed, however, that not all indigenous materials are suitable for revegetation purposes. Some have been insufficiently winterhardy for general use, as apparently their ability to persist in their native habitat is related to the particular set of conditions in which they occur. Susceptibility to diseases or failure to persist well in a dense stand militates against the use of certain native types. Growth form also must be considered. If the objective of a planting is to maintain a fairly uniform , turf-like growth, then tall, coarse-growing plants should be avoided. Patience is required in the use of native plants in that their seedling vigor is often low compared to that of m any commercially available cultivars, and the natives may be suppressed when seeded along with more vigorous cultivars. The investigations on revegetation in conjunction with the Prudhoe Bay oil field and trans- Alaska pipeline activities have resulted in the release o f three cultivars derived from indigenous Alaskan materials. Many o f the collections for these cultivars were made prior to 1969 and some date back to 1966. The establishment of this material in small nurseries at the Palmer Experiment Station prior to the oil field activity enabled seed to be obtained for the early testing programs. The three cultivars were developed primarily for revegetation purposes and are particularly important to arctic rehabilitation efforts (Mitchell, 1978) where the need for additional material is most pressing. One cultivar, Tundra, is recommended strictly for arctic use. The other two, Alyeska and Sourdough, can be applied throughout mainland Alaska in appropriate situations. The latter two may also have application as forage grasses in areas where other available materials may be poorly adapted.Preface -- Introduction -- Varieties: Tundra Glaucous Bluegrass, Alaska Polargrass, Sourdough Bluejoint Reedgrass -- Summary -- Acknowledgements -- Reference

An analysis of the North East Worker Registration Scheme data: Second briefing paper for the Talent North East Steering Group

This is the second briefing paper for the Steering Group on registrations by A8 workers to the Worker Registration Scheme (WRS) in the North East. It is based on a freedom of information request and contains the full data set for the North East region. This full set includes seven separate periods which allows some discussion of change over two distinct periods. The data does, though, carry a number of ‘health warnings’ as to accuracy of migration flow. This second set of data also has further caveats as it is now provided not with the original postcode of employers but with their postcode already broken down into local authority boundaries. What this means is that (1) currently up to six per cent of those who have registered are not now included. This is because they have originally not provided a completely accurate postcode and are therefore excluded when the sets are broken down into local authority boundaries. The occupation data set also contains only the top ten occupations. In both cases this means that some A8 registered workers who were included in briefing one are now not. For example this is most apparent with the occupation data and in particular the Administrative SOC2000 category which has been reduced from 112 to just 15; (2) the four separate data sets obtained (nationality, gender, age and occupation) have differing final and therefore sub?regional totals. The author has been informed that this is due to firstly people not answering all the questions when registering and secondly that the sets are now rounded to the nearest five as is common to maintain individual anonymity. As other national migration data sources, for example the national insurance number allocations for foreign workers and the labour force survey, also have their own limitations when used in a North East, sub?regional and local authority context. The WRS data still provides useful labour market A8 migration information for the region and is one part of a wider picture of change in our regional labour market since May 2004

The transaction pattern through automating TrAM

Transaction Agent Modelling (TrAM) has demonstrated how the early requirements of complex enterprise systems can be captured and described in a lucid yet rigorous way. Using Geerts and McCarthy’s REA (Resource-Events-Agents) model as its basis, the TrAM process manages to capture the ‘qualitative’ dimensions of business transactions and business processes. A key part of the process is automated model-checking, which CG has revealed to be beneficial in this regard. It enables models to retain the high-level business concepts yet providing a formal structure at that high-level that is lacking in Use Cases. Using a conceptual catalogue informed by transactions, we illustrate the automation of a transaction pattern from which further specialisations impart a tested specification for system implementation, which we envisage as a multi-agent system in order to reflect the dynamic world of business activity. It would furthermore be able to interoperate across business domains as they would share the generalised TM as a pattern.</p

European Economic and Monetary Union: Transitional Issues and Third-Stage Dilemmas. European Policy Papers #4

This paper considers two kinds of issues facing EMU. One concerns qualifications and membership: how qualifications are evaluated and which member states are likely to meet the criteria set for membership in the third stage of EMU in 1999. The other concerns the capacity of member states, individually and collectively, to deal with economic policy after the advent of the third stage. In particular, will they be able to address the long-term problems of low growth and high unemployment that afflict so much of Europe? In regard to the first issue, the paper suggests, for supporters of EMU, some reason for optimism. It is very likely that the third stage of EMU will begin on the first day of 1999 and also that the "euro-zone" that comes into being on that day will, in all likelihood, include a large number of member states - almost certainly as many as 8 and probably as many as 10 or 11. On the second issue - the capacity of EMU to address the long-term problems of low growth and high unemployment - the paper suggests some reason for concern and pessimism. Most of the member states participating in the third stage of EMU are likely to continue experiencing low growth and high unemployment. Neither monetary policy nor exchange rate policy is likely to be applied so as to generate any significant increase in the long-term rate of economic growth or any decrease in the high levels of unemployment that now exist in most of the likely "euro-zone" members. Moreover, the Treaty creates no institutional capacity for collective action in economic policy that might enable the member states participating in EMU to redress those problems, and there seems to be little desire in the EU as a whole to create that institutional capacity

'Join us on our journey': Exploring the experiences of children and young people with type 1 diabetes and their parents

This paper focuses on children and young people with type 1 diabetes and on their parents, and their experiences of diabetes care provision. Nine acute hospitals in the Yorkshire and the Humber region, UK, were recruited to participate in a qualitative research study. Children and young people with type 1 diabetes, aged 6–25, and their parents (approximately 250 participants), took part in talking groups to find out about their experiences of diabetes care provision. Findings show that there are key areas for improvement in the future diabetes care provision for children and young people, including communication and support, schools, structured education and transition. These have important implications for practice and service redesign. This study is thought to be the first of its kind to consult with children, young people and parents to find out about their experiences of type 1 diabetes care provision. The research findings add to the current evidence base by highlighting the disparities in care, the urgent need for change in the way services are delivered and the involvement of service users in this process