13,830 research outputs found
Gaia Science Operations Centre
Brief outline of Science Operations Centre activities for Gaia.Comment: 2 pages no figure
Guiding the Development of Efficient and Durable Electrodes for Electrochemical Energy Conversion Applications through Advanced Ion Beam Analysis
Surface-sensitive ion beam techniques, such as Secondary Ion Mass Spectrometry (SIMS) and Low-Energy Ion Scattering (LEIS), are making significant contributions to further our understanding of the materials’ performance and the degradation processes that occur under operating conditions. In this contribution, we explore how recent instrumental developments and analytical approaches have boosted the application of these powerful techniques for the characterization of surfaces and interfaces in energy conversion and storage devices.Universidad de Málaga. Campus de Excelencia Internacional AndalucĂa Tech
Development of Utility Function for Life Insurance Buyers in the Indian Market
<div align="justify">Insurance as a financial instrument has been used for a long time. The dramatic increase in competition within the insurance sector (in terms of providers coupled with awareness for the need for insurance) has concomitantly resulted in more policy options being available in the market. The insurance seller needs to know the buyers preference for an insurance product accurately. Based on such multi-criterion decision-making, we use a logarithmic goal programming method to develop a linear utility model. The model is then used to develop a ready reckoner for policies that will aid investors in comparing them across various attributes</div>
Modelling Aggregate Personal Income Tax Revenue in Multi-Schedular and Multi-Regional Structures
This paper derives analytical expressions for aggregate personal income tax revenue obtained from a multi-schedular and multi-regional personal income tax system, with revenue divided among central and regional governments. Aggregate income tax revenue is expressed as a function of characteristics of the distribution of taxable income, making it possible to identify the sources of revenue differences among regions. The approach is applied to the tax structure in Spain, and the effects of income distribution differences among the Spanish regions is examined.
PEM-West trajectory climatology and photochemical model sensitivity study prepared using retrospective meteorological data
Trajectory and photochemical model calculations based on retrospective meteorological data for the operations areas of the NASA Pacific Exploratory Mission (PEM)-West mission are summarized. The trajectory climatology discussed here is intended to provide guidance for flight planning and initial data interpretation during the field phase of the expedition by indicating the most probable path air parcels are likely to take to reach various points in the area. The photochemical model calculations which are discussed indicate the sensitivity of the chemical environment to various initial chemical concentrations and to conditions along the trajectory. In the post-expedition analysis these calculations will be used to provide a climatological context for the meteorological conditions which are encountered in the field
Dynamics of three-body correlations in quenched unitary Bose gases
We investigate dynamical three-body correlations in the Bose gas during the
earliest stages of evolution after a quench to the unitary regime. The
development of few-body correlations is theoretically observed by determining
the two- and three-body contacts. We find that the growth of three-body
correlations is gradual compared to two-body correlations. The three-body
contact oscillates coherently, and we identify this as a signature of Efimov
trimers. We show that the growth of three-body correlations depends
non-trivially on parameters derived from both the density and Efimov physics.
These results demonstrate the violation of scaling invariance of unitary
bosonic systems via the appearance of log-periodic modulation of three-body
correlations
Characterisation of the mechanical and thermal degradation behaviour of natural fibres for lightweight automotive applications
It is well established that light-weighting of automotive parts leads to reduced carbon emissions over vehicle lifetime. Mineral fibres and fillers have a relatively high density and may require high levels of energy in their production, resulting in a large carbon footprint. Natural fibres have been identified as a potential candidate to substitute mineral fillers in automotive application of thermoplastic matrix composites. This paper focuses on the characterisation of the mechanical and thermal degradation of two types of natural fibres (date palm and coir fibres) as part of an evaluation of their potential for the substitution of high density mineral fillers with more environmentally friendly lower density natural fibre reinforcements
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