1,681 research outputs found

    The global justice movement: resistance to dominant economic models of globalization

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    Resistance to dominant economic models of globalization has a long history that reaches back to various movements, protests and campaigns, as for example the Tupac Amaru uprising (1780–1781) or the anti-slave trade movement (which peaked between 1787 and 1807). This chapter focusses on one of the most recent incarnations, the ‘global justice movement’ (GJM). The recent mobilizations by the Indignados and the Occupy movements do not form part of this movement. These current movements entered the scene in 2011 and became prominent for their large street protests and occupations of public spaces. They are mainly directed towards their respective national governments, claiming more democracy and protesting against austerity programmes. According to Dieter Rucht in this volume ‘a social movement can be defined as a network of individuals, groups and organizations that, based on a sense of collective identity, seek to bring about social change (or resist social change) primarily by means of collective public protest’. In order to speak about a movement as an entity, there has to exist a certain degree of consensus of what activists perceived as a grievance and how problems and solutions are defined. The actors within movements also need to be related to each other, at least in the sense that they consider their struggles as related. Similarities in action forms and internal practices also have to exist in a meaningful way in order for observers to be able to talk about movements. These criteria are also important when we decide whether to consider a movement as a new movement or as a continuity of an existing movement. Although some claims and practices are very similar to the GJM’s, the organizational structure of the current protests differs and the international ties of the GJM are hardly used by these new movements. As the current mobilizations have a lot in common with the global justice movement and as there already exists some comparative research on these movements that reveals the continuities between the GJM and the current mobilizations, this chapter will occasionally highlight connections and similarities as well as differences and discontinuities between these movements

    DLC-1 Over-Expression and Growth Inhibition in Saccharomyces Cerevisiae

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    The activity and regulation of RNA-binding proteins (RBP) is an important topic in studies of gene expression. The regulation of RBPs includes interactions with cofactors. One cofactor that our lab has identified is DLC-1, a small protein that prompts the association of a RBP with subcellular RNA granules. Previous research on a protein, Pbp1, with similar effects in Saccharomyces cerevisiae (yeast) shows that Pbp-1 over-expression leads to growth inhibition in yeast cells due to the promotion of excessive RNA granule formation (Swisher and Parker, 2010). Due to similar effects between Pbp-1 and DLC-1, we hypothesize that DLC-1, when over-expressed, will cause growth inhibition in yeast cells. Saccharomyces cerevisiae is the model organism that we will use to investigate this question because it is cost efficient, allows for fast results, and is relevant for humans because many of the proteins present in yeast have mammalian orthologs. This hypothesis will be tested on multiple strains of yeast. Using these different strains, we will express DLC-1, two positive controls (Pab1 and Dhh1), and a negative control under the control of a galactose-inducible promotor. We will then grow the yeast on agarose plates that contain different concentrations of sugars (galactose and sucrose). We vary the concentrations of sugars in order to control the activity of the promotor, resulting in protein over-expression in higher concentrations of galactose. The yeast will then be incubated on the plates for five days. At the end of the incubation period, potential lack of cell growth on the high-galactose plate will suggest if DLC-1 over-expression does lead to inhibition of cell growth. Understanding how expression of DLC-1 is related to cell growth and RNA granule formation is important because abnormal RNA granule formation is linked to neurodegenerative diseases

    Untersuchungen zur SpezifitÀtsfrage der heterosynaptischen Facilitation bei Aplysia californica

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    1. Heterosynaptic facilitation (H.S.F.) could be obtained in 10–15% of all tested nerve cells in the abdominal and left pleural ganglion of Aplysia californica.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47441/1/424_2004_Article_BF00362957.pd

    Spatial and Temporal Variability in MLT Turbulence Inferred from in situ and Ground-Based Observations During the WADIS-1 Sounding Rocket Campaign

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    In summer 2013 the WADIS-1 sounding rocket campaign was conducted at the AndĂžya Space Center (ACS) in northern Norway (69° N, 16° E). Among other things, it addressed the question of the variability in mesosphere/lower thermosphere (MLT) turbulence, both in time and space. A unique feature of the WADIS project was multi-point turbulence sounding applying different measurement techniques including rocket-borne ionization gauges, VHF MAARSY radar, and VHF EISCAT radar near TromsĂž. This allowed for horizontal variability to be observed in the turbulence field in the MLT at scales from a few to 100 km. We found that the turbulence dissipation rate, Δ varied in space in a wavelike manner both horizontally and in the vertical direction. This wavelike modulation reveals the same vertical wavelengths as those seen in gravity waves. We also found that the vertical mean value of radar observations of Δ agrees reasonably with rocket-borne measurements. In this way defined 〈ΔradarâŒȘ value reveals clear tidal modulation and results in variation by up to 2 orders of magnitude with periods of 24 h. The 〈ΔradarâŒȘ value also shows 12 h and shorter (1 to a few hours) modulations resulting in one decade of variation in 〈ΔradarâŒȘ magnitude. The 24 h modulation appeared to be in phase with tidal change of horizontal wind observed by SAURA-MF radar. Such wavelike and, in particular, tidal modulation of the turbulence dissipation field in the MLT region inferred from our analysis is a new finding of this work

    Combined wind measurements by two different lidar instruments in the Arctic middle atmosphere

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    During a joint campaign in January 2009, the Rayleigh/Mie/Raman (RMR) lidar and the sodium lidar at the ALOMAR Observatory (69° N, 16° E) in Northern Norway were operated simultaneously for more than 40 h, collecting data for wind measurements in the middle atmosphere from 30 up to 110 km altitude. As both lidars share the same receiving telescopes, the upper altitude range of the RMR lidar and the lower altitude range of the sodium lidar overlap in the altitude region of ≈80–85 km. For this overlap region we are thus able to present the first simultaneous wind measurements derived from two different lidar instruments. The comparison of winds derived by RMR and sodium lidar is excellent for long integration times of 10 h as well as shorter ones of 1 h. Combination of data from both lidars allows identifying wavy structures between 30 and 110 km altitude, whose amplitudes increase with height. We have also performed vertical wind measurements and measurements of the same horizontal wind component using two independent lasers and telescopes of the RMR lidar and show how to use this data to calibrate and validate the wind retrieval. For the latter configuration we found a good agreement of the results but also identified inhomogeneities in the horizontal wind at about 55 km altitude of up to 20 ms<sup>−1</sup> for an integration time of nearly 4 h. Such small-scale inhomogeneities in the horizontal wind field are an essential challenge when comparing data from different instruments

    Large mesospheric ice particles at exceptionally high altitudes

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    We here report on the characteristics of exceptionally high Noctilucent clouds (NLC) that were detected with rocket photometers during the ECOMA/MASS campaign at AndĂžya, Norway 2007. The results from three separate flights are shown and discussed in connection to lidar measurements. Both the lidar measurements and the large difference between various rocket passages through the NLC show that the cloud layer was inhomogeneous on large scales. Two passages showed a particularly high, bright and vertically extended cloud, reaching to approximately 88 km. Long time series of lidar measurements show that NLC this high are very rare, only one NLC measurement out of thousand reaches above 87 km. The NLC is found to consist of three distinct layers. All three were bright enough to allow for particle size retrieval by phase function analysis, even though the lowest layer proved too horizontally inhomogeneous to obtain a trustworthy result. Large particles, corresponding to an effective radius of 50 nm, were observed both in the middle and top of the NLC. The present cloud does not comply with the conventional picture that NLC ice particles nucleate near the temperature minimum and grow to larger sizes as they sediment to lower altitudes. Strong up-welling, likely caused by gravity wave activity, is required to explain its characteristics

    Time course of repetitive heterosynaptic facilitation in Aplysia californica

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33356/1/0000754.pd
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