A contagious living fluid: objectification and assemblage in the history of virology

This article deals with the birth of `the virus' as an object of technoscientific analysis. The aim is to discuss the process of objectification of pathogen virulence in virological and medical discourses. Through a short excursion into the history of modern virology, it will be argued that far from being a matter of fact, pathogen virulence had to be `produced', for example in petri-dishes, test-kits and hyper-real signification-practices. The now commonly accepted objective status of `the virus' has been an accomplishment of a complex ensemble of actors. Indeed, this illustrates why objectification rather than objectivity has become the main focus of science and technology studies. The objectification of `the' virus was by no means a smooth process. It involved more than five decades of highly speculative and fragmented research projects before it became actualized as a separate discipline under the heading of virology. The specific objectification of viruses took place through an inter-disciplinary de-differentiation of research questions, methodologies, techniques and technologies. The main argument of this article is that viruses only became intelligible after the establishment of a virology-assemblage. Its inauguration in the early 1950s was radical and sudden because only then could the various substrands of virological technoscience affect each other through deliberate enrolment, and engender a universal intelligibility

Network

Network is a device for organising and conceptualising non-linear complexity. Networks defy narrative, chronology and thus also genealogy because they entail a multiplicity of traces. Networks problematize boundaries and centrality but intensify our ability to think in terms of flows and simultaneity. As a concept, network has been highly conducive to theorizing phenomena and processes such as globalization, digital media (Internet), speed, symbiosis and complexity. This in turn enables us to rethink what constitutes the foundations of intelligence, knowledge and even life itself. One particularly useful application of network as a concept is the notion of the gift, which is often seen as the archetypical figure for understanding the nature of economics and social relationships

Social spatialization and everyday life

This editorial introduction discusses the problematic ‘demonology’ of spatial analyses that attempt to understand the logic of the social in terms of subject-based origins. Taking the poststructuralist notion of decentred subjectivity to task, it uses the metaphor of exorcism to approach everyday life as a haunted space. Instead of identifying the true demons behind the voices rendering an account of everyday life, it shifts methodological attention to the incommensurable multiplicity of traces through which we map and narrate a hermeneutics of becoming

Disastrous social theory: lessons from New Orleans

Contemporary social theory struggles to deal with disasters not just because of epistemological shortcomings regarding the continued dualistic nature of its dealings with social phenomena and events, relegating disasters to the real of “extraordinary events,” but also because it has effectively foreclosed on its ability to deal with social reality. The latter is less the consequence of epistemic shortcomings but itself a social by-product of the institutionalization of social thought in the academy. Divorced from an ability to come to terms with social reality, because it lacks both an empirical grounding and a sense of urgency to understand that which lies outside the comfort zone of academic life, social theory is left rather aimlessly afloat amid a sea of debris that signals that the apocalypse has already happened

The low-mass Initial Mass Function in the young cluster NGC 6611

NGC 6611 is the massive young cluster (2-3 Myr) that ionises the Eagle Nebula. We present very deep photometric observations of the central region of NGC 6611 obtained with the Hubble Space Telescope and the following filters: ACS/WFC F775W and F850LP and NIC2 F110W and F160W, loosely equivalent to ground-based IZJH filters. This survey reaches down to I ~ 26 mag. We construct the Initial Mass Function (IMF) from ~ 1.5 Msun well into the brown dwarf regime (down to ~ 0.02 Msun). We have detected 30-35 brown dwarf candidates in this sample. The low-mass IMF is combined with a higher-mass IMF constructed from the groundbased catalogue from Oliveira et al. (2005). We compare the final IMF with those of well studied star forming regions: we find that the IMF of NGC 6611 more closely resembles that of the low-mass star forming region in Taurus than that of the more massive Orion Nebula Cluster (ONC). We conclude that there seems to be no severe environmental effect in the IMF due to the proximity of the massive stars in NGC 6611.Comment: accepted for publication in MNRAS (main journal); 18 pages, 12 figures and 3 table

Star Formation in the Eagle Nebula and NGC 6611

We present IZJHKL' photometry of the core of the cluster NGC 6611 in the Eagle Nebula. This photometry is used to constrain the Initial Mass Function (IMF) and the circumstellar disk frequency of the young stellar objects. Optical spectroscopy of 258 objects is used to confirm membership and constrain contamination as well as individual reddening estimates. Our overall aim is to assess the influence of the ionizing radiation from the massive stars on the formation and evolution of young low-mass stars and their disks. The disk frequency determined from the JHKL' colour-colour diagram suggests that the ionizing radiation from the massive stars has little effect on disk evolution (Oliveira et al. 2005). The cluster IMF seems indistinguishable from those of quieter environments; however towards lower masses the tell-tale signs of an environmental influence are expected to become more noticeable, a question we are currently addressing with our recently acquired ultra-deep (ACS and NICMOS) HST images.Comment: in "Triggered Star Formation in a Turbulent ISM", IAU symposium, poster contribution; a full version of the poster can be found at http://www.astro.keele.ac.uk/~jacco/papers/IAUS237_Eagle_2006.pd

2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds: The north-eastern region of the Large Magellanic Cloud

We present spectral classifications from optical spectroscopy of 263 massive stars in the north-eastern region of the Large Magellanic Cloud. The observed two-degree field includes the massive 30 Doradus star-forming region, the environs of SN1987A, and a number of star-forming complexes to the south of 30 Dor. These are the first classifications for the majority (203) of the stars and include eleven double-lined spectroscopic binaries. The sample also includes the first examples of early OC-type spectra (AAOmega 30 Dor 248 and 280), distinguished by the weakness of their nitrogen spectra and by C IV 4658 emission. We propose that these stars have relatively unprocessed CNO abundances compared to morphologically normal O-type stars, indicative of an earlier evolutionary phase. From analysis of observations obtained on two consecutive nights, we present radial-velocity estimates for 233 stars, finding one apparent single-lined binary and nine (>3sigma) outliers compared to the systemic velocity; the latter objects could be runaway stars or large-amplitude binary systems and further spectroscopy is required to investigate their nature.Comment: Accepted by A&