7,186 research outputs found
The contribution of online newspapers to the public sphere: a United Kingdom case study
This article examines the online presence of the U.K. national daily newspaper press. The differences between the offline and online markets for the content of newspapers
are examined and the performance of the 10 daily titles is compared in the 2 spheres. It is shown that the success in attracting audiences of the online editions does not reproduce the patterns of offline editions. In particular, the online sites of "quality" newspapers are much more successful than those of "tabloid" newspapers. The possible reasons for this are reviewed and it is concluded that the kinds of material normally found in quality newspapers are enhanced by their presentation in thenewmedium, whereas
those found in tabloid newspapers are often provided better online by other specialist competitors. A typology of online newspapers is then proposed, constructed in terms
of the relationship between offline and online titles and the implications of the different categories are considered. In conclusion it is noted that, although it might be possible to interpret the data to suggest that the development of online newspapers acts to enhance the public sphere, there are important factors that make an alternative conclusion more convincing. The kinds of material that are most successful online are those
that address the concerns of the elite, and the online public sphere will embody the same sorts of exclusions that are present offline, but in a more extreme form
Extracorporeal membrane oxygenation with multiple-organ failure: Can molecular adsorbent recirculating system therapy improve survival?
BACKGROUND: Liver dialysis, molecular adsorbent recirculating system (MARS) particularly, has been used in liver failure to bridge to transplantation. We expanded the indication for MARS to patients with acute shock liver failure and cardiopulmonary failure on extracorporeal membrane oxygenation (ECMO), aiming to improve survival to wean from ECMO.
METHODS: Retrospective chart analysis of patients on ECMO between 2010 and 2015 found 28 patients who met the criteria for acute liver failure, diagnosed by hyperbilirubinemia (total bilirubin ≥10 mg/dl) or by elevated transaminase (alanine transaminase \u3e1,000 IU/liter). Of these patients, 14 underwent MARS treatment (Group M), and 14 were supported with optimal medical treatment without MARS (Group C). Patient characteristics, liver function, and survival were compared between groups.
RESULTS: Demographics, clinical risk factors, and pre-ECMO laboratory data were identical between the groups. MARS was used continuously for 8 days ± 9 in Group M. Total bilirubin, alanine transaminase, and international normalized ratio were improved significantly in Group M. There were no MARS-related complications. Survival to wean from ECMO for Group M was 64% (9/14) vs 21% (3/14) for Group C (p = 0.02). Mortality related to worsening liver dysfunction during ECMO was 40% (2/5 deaths) in Group M and 100% (11/11 deaths) in Group C (p = 0.004). The 30-day survival after ECMO was 43% (6/14) in Group M and 14% (2/14) in Group C (p = 0.09).
CONCLUSIONS: MARS therapy in patients on ECMO safely accelerated recovery of liver function and improved survival to wean from ECMO, without increasing complications
A Roller Coaster for the Mind: Virtual Reality Sickness Modes, Metrics, and Mitigation
Understanding and preventing virtual reality sickness(VRS), or cybersickness, is vital in removing barriers for the technology\u27s adoption. Thus, this article aims to synthesize a variety of academic sources to demonstrate the modes by which VRS occurs, the metrics by which it is judged, and the methods to mitigate it. The predominant theories on the biological origins of VRS are discussed, as well as the individual factors which increase the likelihood of a user developing VRS. Moreover, subjective and physiological measurements of VRS are discussed in addition to the development of a predictive model and conceptual framework. Finally, several methodologies of reducing VRS by improving VR hardware and software are covered
HST and Spitzer point source detection and optical extinction in powerful narrow-line radio galaxies
We present the analysis of infrared HST and Spitzer data for a sample of 13
FRII radio galaxies at 0.03<z<0.11 that are classified as narrow-line radio
galaxies (NLRG). In the context of the unified schemes for active galactic
nuclei (AGN), our direct view of the AGN in NLRG is impeded by a parsec-scale
dusty torus structure. Our high resolution infrared observations provide new
information about the degree of extinction induced by the torus, and the
incidence of obscured AGN in NLRG.
We find that the point-like nucleus detection rate increases from 25 per cent
at 1.025m, to 80 per cent at 2.05m, and to 100 per cent at 8.0m.
This supports the idea that most NLRG host an obscured AGN in their centre. We
estimate the extinction from the obscuring structures using X-ray, near-IR and
mid-IR data. We find that the optical extinction derived from the 9.7m
silicate absorption feature is consistently lower than the extinction derived
using other techniques. This discrepancy challenges the assumption that all the
mid-infrared emission of NLRG is extinguished by a simple screen of dust at
larger radii. This disagreement can be explained in terms of either weakening
of the silicate absorption feature by (i) thermal mid-IR emission from the
narrow-line region, (ii) non-thermal emission from the base of the radio jets,
or (iii) by direct warm dust emission that leaks through a clumpy torus without
suffering major attenuation.Comment: 18 pages, 7 figures, 8 tables, accepted for publication in MNRA
Aurora Volume 32
College formerly located at Olivet, Illinois and known as Olivet University (1912-1923) Olivet College (1923-1939), Olivet Nazarene College (1940-1986), and Olivet Nazarene University (1986-Present).https://digitalcommons.olivet.edu/arch_yrbks/1098/thumbnail.jp
The Effects of Changes in Reaction Rates on Simulations of Nova Explosions
Classical novae participate in the cycle of Galactic chemical evolution in
which grains and metal enriched gas in their ejecta, supplementing those of
supernovae, AGB stars, and Wolf-Rayet stars, are a source of heavy elements for
the ISM. Once in the diffuse gas, this material is mixed with the existing
gases and then incorporated into young stars and planetary systems during star
formation. Infrared observations have confirmed the presence of carbon, SiC,
hydrocarbons, and oxygen-rich silicate grains in nova ejecta, suggesting that
some fraction of the pre-solar grains identified in meteoritic material come
from novae. The mean mass returned by a nova outburst to the ISM probably
exceeds ~2 x 10^{-4} Solar Masses. Using the observed nova rate of 35 per year
in our Galaxy, it follows that novae introduce more than ~7 x 10^{-3} Solar
Masses per year of processed matter into the ISM. Novae are expected to be the
major source of 15N and 17O in the Galaxy and to contribute to the abundances
of other isotopes in this atomic mass range. Here, we report on how changes in
the nuclear reaction rates affect the properties of the outburst and alter the
predictions of the contributions of novae to Galactic chemical evolution. We
also discuss the necessity of including the pep reaction in studies of
thermonuclear runaways in material accreted onto white dwarfs.Comment: 9 pages, 2 figures, as it appeared in the Proceedings of the Tours
2006 Symposium on Nuclear Physic
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