2,920 research outputs found

    A high sensitivity balloon-borne X-ray telescope system

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    A high sensitivity X-ray telescope system suitable for photometric type observations from balloon altitudes is described. The balloon gondola system is defined to include the performance requirements and the overall performance requirements of the balloon gondola support system. Diagrams of the gondola and the installed components are provided. The pointing and control system of the telescope is analyzed

    Mapping an ancient historian in a digital age: the Herodotus Encoded Space-Text-Image Archive (HESTIA)

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    HESTIA (the Herodotus Encoded Space-Text-Imaging Archive) employs the latest digital technology to develop an innovative methodology to the study of spatial data in Herodotus' Histories. Using a digital text of Herodotus, freely available from the Perseus on-line library, to capture all the place-names mentioned in the narrative, we construct a database to house that information and represent it in a series of mapping applications, such as GIS, GoogleEarth and GoogleMap Timeline. As a collaboration of academics from the disciplines of Classics, Geography, and Archaeological Computing, HESTIA has the twin aim of investigating the ways geography is represented in the Histories and of bringing Herodotus' world into people's homes

    Remittances from Sweden. an Exploration of Swedish Survey Data

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    The present study explores data on transfers of gifts/economic support to relatives from a recent Swedish Household Income Survey (HEK) compiled by Statistics Sweden. It provides the first analysis of demographic determinants of remittances from Sweden based on official household survey and register data. By exploring a data set that also includes non-migrant households, it presents a unique comparison of patterns of gift-giving and intra-family support between migrant and non-migrant households. We argue that data from the Household Income Survey can be used to obtain an empirically based estimation of the determinants of remittances from Sweden. According to our results, the flows of remittances to developing countries from Sweden appear to be relatively small in comparison with remittance flows from other developed countries. The article analyses these transfers of gifts/economic support in relation to different kinds of income, education, age, time since migration, acquisition of citizenship and family situation. Analyses are made for three types of country groups : developing countries, non-developing countries and Sweden. Whereas the general propensity to give economic support to relatives is similar among native Swedes and migrants from developing and non-developing countries, the patterns of gift-giving and intra-family economic support differ significantly over the life course between individuals from different country groups. Native Swedes tend to give gifts and economic support to relatives at higher ages and when they have adult children who have moved away from home. Migrants from developing countries tend to be younger and have children living at home. The propensity of native Swedes to remit increases with increasing income. Among migrants born in developing countries, other factors than income seem to be more decisive for the propensity to remit. Diverging patterns of remittances between migrants from developing countries and the other groups indicate that remittances are strongly related to phases in the individual life course that vary with the individual migration history.Remittances; Intra-family transfers; Life course

    Measuring Support to Agriculture in a Transition Economy in the Southern Balkans: The case of FYR Macedonia

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    As a candidate country to the EU and a member of the WTO there is a need for a comprehensive, transparent and internationally comparable assessment of the support to agriculture in Macedonia. OECD that has been measuring support to agriculture on a yearly basis, in its member countries as well as some other countries since the mid-1980s, offers a good tool for such a task. The method is known for its most important indicator, the Producer Support Estimate (PSE). Using this method, data on Macedonian agricultural policy measures, in place ā€“ partly or entirely - for the period 1999 to 2004, have been gathered and categorized in order to arrive at an estimate of the level of support.Producer support estimate (PSE), FYR Macedonia, trade protection, Agricultural and Food Policy,

    A Multistate Manpower Projection Model

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    This paper describes the structure and application of a multistate projection model that was developed by the Operational Research Service of the Department of Health and Social Security, UK. The model can be used to calculate the evolution of a multistate manpower or population distribution, with each state's stock classified either by length of time in a state or by age and subdivided into up to four noninteracting population subgroups (e.g., according to sex and country of origin). Both Markov ("push") and Renewal ("pull") flows can be simulated and a wide range of different network configurations can be modeled. Medical manpower planning problems are also discussed--in particular the issue of career planning for doctors in the presence of demand constraints--to exemplify the possible uses of the model. As background, the role of manpower planning in health care planning and the sorts of problems that arise in balancing the supply of, and demand for, any manpower group are outlined. The generality of the Department of Health and Social Security model is demonstrated by highlighting its structural similarity to the multistate models that have been the subject of study at IIASA in recent years. The model's uses in detecting both potential manpower supply instabilities in market-based manpower systems and planning in feasibilities in planned systems are pointed out. A model run is discussed, based on a hypothetical situation, in which growth rates of one grade in a manpower network lead to supply problems for the whole network. The Appendix contains sample input and output files
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