10 research outputs found
MOBILE PRACTICES AND THE INCREASING INDIVIDUATION OF WORKPLACE
An increasing portion of the contemporary workforce is using mobile devices to create new kinds of work-space flows characterized by emergence, liquidity, and the blurring of all kinds of boundaries. This changes the traditional notion of the term workplace. The study reported on in this paper focused on how people enact and make sense of new work space boundaries enabled by their mobile practices. A uniqu method of data collection ”the use of cultural probes ”was adapted to an online format to facilitate participant reflection and documentation of mobile practices. Coupled with in-depth interviews, this methodology enabled the thick description of how individuals enacted spatial, temporal, and psychosocial boundaries of workplace through their mobile practices. Findings show that the growing reality of workplace for many is that it is becoming less a singular place dedicated to work performed in a predictable frame of time and evolving more towards an idiosyncratic space that takes on the spatial and temporal requirements of the individual worker ”the overarching claim being the increasing individuation of workplace enabled by mobile devices. \ \ Keywords: enactment, mobile practices, boundaries, workplace, emergent organization
A blind ATCA HI survey of the Fornax galaxy cluster:Properties of the HI detections
We present the first interferometric blind HI survey of the Fornax galaxy cluster, which covers an area of 15 deg2 out to the cluster virial radius. The survey has a spatial and velocity resolution of 67″ × 95″(∼6 × 9 kpc at the Fornax cluster distance of 20 Mpc) and 6.6 km s−1 and a 3σ sensitivity of NHI ∼ 2 × 1019 cm−2 and MHI ∼ 2 × 107 M⊙, respectively. We detect 16 galaxies out of roughly 200 spectroscopically confirmed Fornax cluster members. The detections cover about three orders of magnitude in HI mass, from 8 × 106 to 1.5 × 1010 M⊙. They avoid the central, virialised region of the cluster both on the sky and in projected phase-space, showing that they are recent arrivals and that, in Fornax, HI is lost within a crossing time, ∼2 Gyr. Half of these galaxies exhibit a disturbed HI morphology, including several cases of asymmetries, tails, offsets between HI and optical centres, and a case of a truncated HI disc. This suggests that these recent arrivals have been interacting with other galaxies, the large-scale potential or the intergalactic medium, within or on their way to Fornax. As a whole, our Fornax HI detections are HI-poorer and form stars at a lower rate than non-cluster galaxies in the same M⋆ range. This is particularly evident at M⋆ ≲ 109 M⊙, indicating that low mass galaxies are more strongly affected throughout their infall towards the cluster. The MHI/M⋆ ratio of Fornax galaxies is comparable to that in the Virgo cluster. At fixed M⋆, our HI detections follow the non-cluster relation between MHI and the star formation rate, and we argue that this implies that thus far they have lost their HI on a timescale ≳1−2 Gyr. Deeper inside the cluster HI removal is likely to proceed faster, as confirmed by a population of HI-undetected but H2-detected star-forming galaxies. Overall, based on ALMA data, we find a large scatter in H2-to-HI mass ratio, with several galaxies showing an unusually high ratio that is probably caused by faster HI removal. Finally, we identify an HI-rich subgroup of possible interacting galaxies dominated by NGC 1365, where pre-processing is likely to have taken place
Shaping Boundaries within the Flow: Workspaces, Environments, Identities
This paper explores how, within the flow and its technology-enabled eradication or blurring of boundaries, individuals and groups create new workspaces, environments, and identities through constructing new, albeit provisional and porous boundaries. Following Manuel Castells\u27s observation that wireless communication technologies diffuse the networking logic of social organization and social practice everywhere, to all contexts—on condition of being on the mobile Net , we observe how people are dealing, from inside the flow, with technology-enabled boundary loss and, simultaneously constructing new, albeit porous boundaries to enact new workspaces, environments, and identities, as well as with the loss and refashioning of traditional third places (Oldenburg) occasioned by that boundary loss. As the flow surges through knowledge workers and citizens today through the increasing ubiquity of the Internet and mobile technologies, pre-flow workplaces, environments, and identities are being replaced by work-space-flows, liquid environments, and multiple co-existing identities
AlFoCS + F3D – II. Unexpectedly low gas-to-dust ratios in the Fornax galaxy cluster
We combine observations from Atacama Large Millimeter/submillimeter Array (ALMA), Australia Telescope Compact Array, Multi Unit Spectroscopic Explorer (MUSE), and Herschel to study gas-to-dust ratios in 15 Fornax cluster galaxies detected in the FIR/sub-mm by Herschel and observed by ALMA as part of the ALMA Fornax Cluster Survey. The sample spans a stellar mass range of 8.3 ≤ log(M⋆/M⊙) ≤ 11.16, and a variety of morphological types. We use gas-phase metallicities derived from MUSE observations (from the Fornax3D survey) to study these ratios as a function of metallicity, and to study dust-to-metal ratios, in a sub-sample of nine galaxies. We find that gas-to-dust ratios in Fornax galaxies are systematically lower than those in field galaxies at fixed stellar mass/metallicity. This implies that a relatively large fraction of the metals in these Fornax systems is locked up in dust, which is possibly due to altered chemical evolution as a result of the dense environment. The low ratios are not only driven by H i deficiencies, but H2-to-dust ratios are also significantly decreased. This is different in the Virgo cluster, where low gas-to-dust ratios inside the virial radius are driven by low H i-to-dust ratios, while H2-to-dust ratios are increased. Resolved observations of NGC 1436 show a radial increase in H2-to-dust ratio, and show that low ratios are present throughout the disc. We propose various explanations for the low H2-to-dust ratios in the Fornax cluster, including the more efficient stripping of H2 compared to dust, more efficient enrichment of dust in the star formation process, and altered interstellar medium physics in the cluster environment
AlFoCS + F3D : II. unexpectedly low gas-to-dust ratios in the Fornax galaxy cluster
We combine observations from Atacama Large Millimeter/submillimeter Array (ALMA), Australia Telescope Compact Array, Multi Unit Spectroscopic Explorer (MUSE), and Herschel to study gas-to-dust ratios in 15 Fornax cluster galaxies detected in the FIR/sub-mm by Herschel and observed by ALMA as part of the ALMA Fornax Cluster Survey. The sample spans a stellar mass range of 8.3 ≤ log(M⋆/M⊙) ≤ 11.16, and a variety of morphological types. We use gas-phase metallicities derived from MUSE observations (from the Fornax3D survey) to study these ratios as a function of metallicity, and to study dust-to-metal ratios, in a sub-sample of nine galaxies. We find that gas-to-dust ratios in Fornax galaxies are systematically lower than those in field galaxies at fixed stellar mass/metallicity. This implies that a relatively large fraction of the metals in these Fornax systems is locked up in dust, which is possibly due to altered chemical evolution as a result of the dense environment. The low ratios are not only driven by H i deficiencies, but H2-to-dust ratios are also significantly decreased. This is different in the Virgo cluster, where low gas-to-dust ratios inside the virial radius are driven by low H i-to-dust ratios, while H2-to-dust ratios are increased. Resolved observations of NGC 1436 show a radial increase in H2-to-dust ratio, and show that low ratios are present throughout the disc. We propose various explanations for the low H2-to-dust ratios in the Fornax cluster, including the more efficient stripping of H2 compared to dust, more efficient enrichment of dust in the star formation process, and altered interstellar medium physics in the cluster environment
NGC 1436: the making of a lenticular galaxy in the Fornax cluster
We study the evolutionary path of the Fornax cluster galaxy NGC1436, which
is known to be currently transitioning from a spiral into a lenticular
morphology. This galaxy hosts an inner star-forming disc and an outer quiescent
disc, and we analyse data from the MeerKAT Fornax Survey, ALMA, and the
Fornax3D survey to study the interstellar medium and the stellar populations of
both disc components. Thanks to the combination of high resolution and
sensitivity of the MeerKAT data, we find that the
is entirely confined within the inner
star-forming disc, and that its kinematics is coincident with that of the CO.
The cold gas disc is now well settled, which suggests that the galaxy has not
been affected by any environmental interactions in the last Gyr. The
star formation history derived from the Fornax3D data shows that both the inner
and outer disc experienced a burst of star formation Gyr ago, followed
by rapid quenching in the outer disc and by slow quenching in the inner disc,
which continues forming stars to this day. We claim that NGC1436 has begun
to effectively interact with the cluster environment 5Gyr ago, when a
combination of gravitational and hydrodynamical interactions caused the
temporary enhancement of the star-formation rate. Furthermore, due to the
weaker gravitational binding was stripped
from the outer disc, causing its rapid quenching. At the same time, accretion
of gas onto the inner disc stopped, causing slow quenching in this region.Comment: Monthly Notices of the Royal Astronomical Society (MNRAS), accepted
for publication. Data available at the MeerKAT Fornax Survey website
https://sites.google.com/inaf.it/meerkatfornaxsurve