EDOS Initiatives to Decrease Latency of NRT Data for LANCE

NASA's EOS Data and Operations System (EDOS) is the primary supplier of NRT (near real-time) data to the NASA NRT user community known as the Land, Atmosphere NRT Capability for EOS (LANCE). EDOS provides NRT data for various instruments on the EOS missions Terra, Aqua, Aura, as well as for the NOAA missions Suomi NPP and NOAA-20. This poster describes an overview of the EDOS multi-mission system with emphasis on the NRT products distributed for LANCE elements: AIRS, MISR, MLS, MODIS, MOPITT, OMPS, OMI and VIIRS. Remote EDOS high-rate data capture systems are deployed at NASA ground stations which provide data-driven capture of high-rate science for EOS missions. The remote EDOS components transfer the science data via high-rate WANs to the centralized EDOS Level-zero processing systems located at Goddard Space Flight Center. EDOS produces session-based data sets especially for LANCE NRT use from a single ground station contact; this data is sent to dual LANCE destinations as part of the standard redundancy requirement for LANCE elements. EDOS has implemented various latency improvements with the ultimate goal to have EDOS processing of NRT data keep up with the spacecraft data downlink. EDOS enhancements have included implementation of priority-based QoS, expanded network architecture to include open networks, and use of a delay-tolerant protocol. EDOS has streamlined its systems and infrastructure to minimize latency for NRT data delivery for LANCE. EDOS begins to transfer the NRT data to the LANCE elements within minutes of the end of the contact session with an average packet latency from instrument observation to Level 0 product delivery to each LANCE element of just over one hour

A problem of riches: towards a new social policy research agenda on the distribution of economic resources

The distribution of economic resources in society is a central concern for social policy. But research in this area has primarily concentrated on the bottom of the economic distribution, namely ‘the poor’. In this article, we argue that it is time for social policy to move away from a narrow focus on poverty to consider the broader issue of inequality between different groups in the economic distribution and, by implication, the position of better-off citizens. This raises a number of conceptual challenges due to the current lack of consideration of wealth and inequality at a political, theoretical or empirical level. The article discusses the challenges and concludes by outlining a possible research agenda. However, the underpinning argument is that social policy needs to develop a broader understanding of the economic distribution

Recruiting a nonlocal language for performing local identity: indexical appropriations of Lingala in the Congolese border town Goma

This article describes discursive processes by which inhabitants of the Congolese border town Goma attribute new indexical values to Lingala, a language exogenous to the area of which most Goma inhabitants only possess limited knowledge. This creative reconfiguration of indexicalities results in the emergence of three "indexicalities of the second order": the indexing of (i) being a true Congolese, (ii) toughness (based on Lingala's association with the military), and (iii) urban sophistication (based on its association with the capital Kinshasa). While the last two second-order reinterpretations are also widespread in other parts of the Congolese territory, the first one, resulting in the emergence of a Lingala as an "indexical icon" of a corresponding "language community," deeply reflects local circumstances and concerns, in particular the sociopolitical volatility of the Rwandan-Congolese borderland that renders publicly affirming one's status as an "autochthonous" Congolese pivotal for assuring a livelihood and at times even personal security. (Lingala, Democratic Republic of the Congo, Goma, orders of indexicality, language community, autochthony, Kiswahili)

Hazards, Risk and the Press: A Comparative Analysis of Newspaper Coverage of Nuclear and Chemical Weapons Sites

The authors present a comparative analysis of newspaper coverage for four hazardous substance containment facilities located in different parts of the country

Informing Writing: The Benefits of Formative Assessment

Examines whether classroom-based formative writing assessment - designed to provide students with feedback and modified instruction as needed - improves student writing and how teachers can improve such assessment. Suggests best practices

Above-threshold ionization with highly-charged ions in super-strong laser fields: I. Coulomb-corrected strong field approximation

Aiming at the investigation of above-threshold ionization in super-strong laser fields with highly charged ions, we develop a Coulomb-corrected strong field approximation (SFA). The influence of the Coulomb potential of the atomic core on the ionized electron dynamics in the continuum is taken into account via the eikonal approximation, treating the Coulomb potential perturbatively in the phase of the quasi-classical wave function of the continuum electron. In this paper the formalism of the Coulomb-corrected SFA for the nonrelativistic regime is discussed employing velocity and length gauge. Direct ionization of a hydrogen-like system in a strong linearly polarized laser field is considered. The relation of the results in the different gauges to the Perelomov-Popov-Terent'ev imaginary-time method is discussed.Comment: 8 pages, 3 figure