Investigations into the degassing and eruption mechanisms of Nyamuragira volcano, Democratic Republic of the Congo (Africa)

One of two active volcanoes in the western branch of the East African Rift, Nyamuragira (1.408ºS, 29.20ºE; 3058 m) is located in the D.R. Congo. Nyamuragira emits large amounts of SO2 (up to ~1 Mt/day) and erupts low-silica, alkalic lavas, which achieve flow rates of up to ~20 km/hr. The source of the large SO2 emissions and pre-eruptive magma conditions were unknown prior to this study, and 1994-2010 lava volumes were only recently mapped via satellite imagery, mainly due to the region’s political instability. In this study, new olivine-hosted melt inclusion volatile (H2O, CO2, S, Cl, F) and major element data from five historic Nyamuragira eruptions (1912, 1938, 1948, 1986, 2006) are presented. Melt compositions derived from the 1986 and 2006 tephra samples best represent pre-eruptive volatile compositions because these samples contain naturally glassy inclusions that underwent less post-entrapment modification than crystallized inclusions. The total amount of SO2 released from the 1986 (0.04 Mt) and 2006 (0.06 Mt) eruptions are derived using the petrologic method, whereby S contents in melt inclusions are scaled to erupted lava volumes. These amounts are significantly less than satellite-based SO2 emissions for the same eruptions (1986 = ~1 Mt; 2006 = ~2 Mt). Potential explanations for this observation are: 1) accumulation of a vapor phase within the magmatic system that is only released during eruptions, and/or 2) syn-eruptive gas release from unerupted magma. Post-1994 Nyamuragira lava volumes were not available at the beginning of this study. These flows (along with others since 1967) are mapped with Landsat MSS, TM, and ETM+, Hyperion, and ALI satellite data and combined with published flow thicknesses to derive volumes. Satellite remote sensing data was also used to evaluate Nyamuragira SO2 emissions. These results show that the most recent Nyamuragira eruptions injected SO2 into the atmosphere between 15 km (2006 eruption) and 5 km (2010 eruption). This suggests that past effusive basaltic eruptions (e.g., Laki 1783) are capable of similar plume heights that reached the upper troposphere or tropopause, allowing SO2 and resultant aerosols to remain longer in the atmosphere, travel farther around the globe, and affect global climates.

Dalle sfide interculturali, al “romanzo”, al progetto socio educativo integrato

Intercultural challenge, “tale” and social educational strategy, Rome, November 2006: Police and Teachers deal differently with a little group of travellers. The analysis of this recent episode shows that intercultural issues are the basis of the educational commitment of the teachers but also of the prejudice of police and other people looking from outside to the relationship between teachers and travellers. The paradox of a double ethic concerning travellers needs to be deconstructed by the antiracist approach based on children rights. At the same time educational intervention cannot deal efficiently with emergency situations concerning children without cooperation with social work. The article underlines the role of democratic educational institutions in the developing appropriated strategies in dealing with complexes social issues which are not just to be “culturalised”.

Defending Democratic Youth Work

The UK's liberal-cum-democratic welfare regime has led to a more developed state-sponsored youth work than in the majority of continental Europe, where a corporatist welfare regime has held sway (Esping Andersen 1990). To this extent British Youth Work has been more susceptible to governmental intervention. Nevertheless the ascendancy of neo-liberalism across the last three decades has disturbed significantly all models of the Welfare State, expressed in the impact of 'New Managerialism'. Thus we are seeing a convergence towards an imposed, instrumental, output-driven approach to the delivery of both education and welfare. In both the UK and continental Europe youth workers and social workers are confronted with intrusive interventions and demands from governments, which are utterly at odds with their shared desire to start from 'where young people are at'. In this paper we sketch the emergence of a campaign within Youth Work, which seeks to oppose and resist its transformation into an agency of social engineering. In contrast we stand for an emancipatory Youth Work committed to social change. In telling our story thus far we hope to reach out to and make alliances with workers across Europe sympathetic to our cause.

The Beauty and the Beast. A Tale of Democratic Crises and Globalization

There are two competing hypotheses concerning the connection between democracy and globalization. The critics hold globalization responsible for an ongoing crisis of democracy. The enthusiasts highlight the positive contributions of financial openness and international political cooperation on the development of democracy. In this contribution the author investigates the interrelation between globalization and the quality of established democracies. He introduces the Democracy Barometer, a new instrument that measures the quality of democracy in 30 established democratic regimes between 1995 and 2005 and that explicitly does not measure sustainable government because it aims at serving as dependent as well as independent variable to explain different economic, societal and natural environment, i.e. sustainable development. Based on this instrument, the author first shows that one cannot speak of an ongoing crisis of (established) democracies. Second, he also conducts several multilevel analyses to model the different developments of the quality of democracy in the different countries. The author then shows that economy, i.e. economic globalization indeed has a positive impact on the quality of democracy. However, this impact is stronger in stable, i.e. older than in younger established democracies. Further investigations show that a high quality of democracy also goes hand in hand with societal and environmental performance.

How Welfare States Shape the Democratic Public: Policy Feedback, Participation, Voting and Attitudes

This crucial volume significantly advances the study of policy feedbacks. With contributions from many subfields and methodological approaches, it offers both sophisticated theorizing and new empirical examples that show how policies make politics in a variety of ways. Innovative research designs provide more convincing inference than ever. And the normative questions engaged about welfare performance, evaluation, participation, and accountability could not be more important or timely in this era of austerity and discord over the future of welfare states.’

A Global Trend towards Democratic Convergence? A Lijphartian Analysis of Advanced Democracies.

The article offers a systematic analysis of the comparative trajectory of international democratic change. In particular, it focuses on the resulting convergence or divergence of political systems, borrowing from the literatures on institutional change and policy convergence. To this end, political-institutional data in line with Arend Lijphart’s (1999, 2012) empirical theory of democracy for 24 developed democracies between 1945 and 2010 are analyzed. Heteroscedastic multilevel models allow for directly modeling the development of the variance of types of democracy over time, revealing information about convergence, and adding substantial explanations. The findings indicate that there has been a trend away from extreme types of democracy in single cases, but no unconditional trend of convergence can be observed. However, there are conditional processes of convergence. In particular, economic globalization and the domestic veto structure interactively influence democratic convergence.