17,146 research outputs found
The Tolman Surface Brightness Test for the Reality of the Expansion. III. HST Profile and Surface Brightness Data for Early-Type Galaxies in Three High-Redshift Clusters
Photometric data for 34 early-type galaxies in the three high-redshift
clusters Cl 1324+3011 (z = 0.76), Cl 1604+4304 (z = 0.90), and Cl 1604+4321 (z
= 0.92), observed with the Hubble Space Telescope (HST) and with the Keck
10-meter telescopes by Oke, Postman & Lubin, are analyzed to obtain the
photometric parameters of mean surface brightness, magnitudes for the growth
curves, and angular radii at various Petrosian eta radii. The angular radii at
eta = 1.3 mag for the program galaxies are all larger than 0.24". All of the
galaxies are well resolved at this angular size using HST whose point-spread
function is 0.05", half width at half maximum. The data for each of the program
galaxies are listed at eta = 1.0, 1.3, 1.5, 1.7, and 2.0 mag. They are
corrected by color equations and K terms for the effects of redshift to the
rest-frame Cape/Cousins I for Cl 1324+3011 and Cl 1604+4304 and R for Cl
1604+4321. The K corrections are calculated from synthetic spectral energy
distributions derived from evolving stellar population models of Bruzual &
Charlot which have been fitted to the observed broad-band (BVRI) AB magnitudes
of each program galaxy. The listed photometric data are independent of all
cosmological parameters. They are the source data for the Tolman surface
brightness test made in Paper IV.Comment: 17 pages, 7 figures; accepted for publication in the Astronomical
Journa
IVOA Recommendation: SAMP - Simple Application Messaging Protocol Version 1.3
SAMP is a messaging protocol that enables astronomy software tools to
interoperate and communicate.
IVOA members have recognised that building a monolithic tool that attempts to
fulfil all the requirements of all users is impractical, and it is a better use
of our limited resources to enable individual tools to work together better.
One element of this is defining common file formats for the exchange of data
between different applications. Another important component is a messaging
system that enables the applications to share data and take advantage of each
other's functionality. SAMP builds on the success of a prior messaging
protocol, PLASTIC, which has been in use since 2006 in over a dozen astronomy
applications and has proven popular with users and developers. It is also
intended to form a framework for more general messaging requirements
Duration discrimination of brief visual off-flashes
Visual flash duration discrimination and analysis of temporal and energy cue models, and memory effect
Development of a stroke assessment team: focus on physiotherapy
A multidisciplinary team was appointed for acute stroke services in preparation for opening a stroke assessment unit at Walsgrave Hospitals NHS Trust. Since introduction, the frequency of physiotherapy treatment for stroke patients has improved, as an indirect consequence of increasing awareness of therapy needs and greater staff confidence in treating stroke patients. </jats:p
A critical race analysis of structural and institutional racism: rethinking overseas registered nurses' recruitment to and working conditions in the United Kingdom
Language tests for overseas registered nurses (ORN) working outside their home country are essential for patient safety, as communication competency needs to be established in any workforce. We argue that the current employment of existing language tests is structurally and institutionally racist and disadvantages ORNs from non‐European Union (EU) and non‐White countries seeking to work in the United Kingdom. Using Critical Race Theory (CRT), we argue that existing English language tests for ORNs seeking registration in the United Kingdom are discriminatory due to the UK's racist migration policies and a regulatory body for nursing and midwifery that fails to acknowledge and understand its own institutionally racist practices
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Durvalumab: an investigational anti-PD-L1 monoclonal antibody for the treatment of urothelial carcinoma.
Our expanding knowledge of immunotherapy for solid tumors has led to an explosion of clinical trials aimed at urothelial carcinoma. The primary strategy is centered on unleashing the immune system by releasing the inhibitory signals propagated by programmed cell death-1 (PD-1) and its ligand programmed cell death ligand-1 (PD-L1). Many antibody constructs have been developed to block these interactions and are used in clinical trials. The Food and Drug Administration has already approved a number of checkpoint inhibitors such as anti-cytotoxic T-lymphocyte-associated protein 4 (CTLA4) monoclonal antibodies including ipilimumab; anti-PD-1 monoclonal antibodies including nivolumab and pembrolizumab; anti-PD-L1 antibodies including atezolizumab, avelumab, and durvalumab. One of the latest inhibitors is durvalumab, which is a high-affinity human immunoglobulin G1 kappa monoclonal antibody and blocks the interaction of PD-L1 with PD-1 and CD80. Currently, there are a number of ongoing trials in advanced urothelial carcinoma both using durvalumab monotherapy and in combination with other targeted therapies. In addition, durvalumab is being investigated in the non-muscle-invasive urothelial carcinoma, which is centered around intravenous formulations. These exciting developments have added a significant number of therapies in a previously limited treatment landscape
Compassion in Practice – evaluating the awareness, involvement and perceived impact of a national nursing and midwifery strategy amongst health care professionals in NHS Trusts in England
Aim: To report the findings from an evaluation of the impact of the Compassion in Practice Vision & Strategy (CiPVS) (National Health Service England (NHSE), 2012) on nursing, midwifery and care staff.
Background: The CiPVS was a programme of work to highlight the importance of compassionate care following the Francis Report in 2013 into the deficits in care in an NHS hospital trust. It was launched by NHS England in 2012 at a time when fiscal cuts were introduced by the Department of Health in England.
Design and setting: Mixed methods.
Results: Inferential statistics were used to test whether there were significant differences between staff at different levels of seniority with regard to awareness and involvement in CiPVS and their attitudes to it. Awareness and involvement of staff in CiPVS was high amongst middle and senior management but limited at ward level. Staff were not involved in CiPVS due to a lack of awareness. Ward level staff who were aware and involved perceived a lack of support and communication from senior leadership to deliver CiPVS.
Discussion: Results reveal professional anger, distress and resistance to CiPVS and a view of the programme as a top down initiative which did not sufficiently recognise structural constraints on nurses’ ability to deliver compassionate care. We discuss the implications of our findings for global nursing.
Conclusion: Participants emphasised that compassion for patients is only sustainable where there is compassion for staff and many participants felt that they were not being treated with compassion.
Relevance for practice: NHSE should strongly affirm that nurses and midwives in general provide compassionate care. Trust leadership should provide support for ward level staff who deliver compassionate care in difficult circumstances
Non-local nuclear spin quieting in quantum dot molecules: Optically-induced extended two-electron spin coherence time
We demonstrate the extension of coherence between all four two-electron spin
ground states of an InAs quantum dot molecule (QDM) via non-local suppression
of nuclear spin fluctuations in both constituent quantum dots (QDs), while
optically addressing only the upper QD transitions. Long coherence times are
revealed through dark-state spectroscopy as resulting from nuclear spin locking
mediated by the exchange interaction between the QDs. Lineshape analysis
provides the first measurement of the quieting of the Overhauser field
distribution correlating with reduced nuclear spin fluctuations.Comment: Supplementary materials can be found on the publication page of our
website. http://research.physics.lsa.umich.edu/dst/Publications.htm
Simulations of turbulent convection in rotating young solar-like stars: Differential rotation and meridional circulation
We present the results of three-dimensional simulations of the deep
convective envelope of a young (10 Myr) one-solar-mass star, obtained with the
Anelastic Spherical Harmonic code. Since young stars are known to be faster
rotators than their main sequence counterparts, we have systematically studied
the impact of the stellar rotation speed, by considering stars spinning up to
five times as fast as the Sun. The aim of these nonlinear models is to
understand the complex interactions between convection and rotation. We discuss
the influence of the turbulence level and of the rotation rate on the intensity
and the topology of the mean flows. For all of the computed models, we find a
solar-type superficial differential rotation, with an equatorial acceleration,
and meridional circulation that exhibits a multicellular structure. Even if the
differential rotation contrast decreases only marginally for high rotation
rates, the meridional circulation intensity clearly weakens according to our
simulations. We have also shown that, for Taylor numbers above a certain
threshold (Ta>10^9), the convection can develop a vacillating behavior. Since
simulations with high turbulence levels and rotation rates exhibit strongly
cylindrical internal rotation profiles, we have considered the influence of
baroclinic effects at the base of the convective envelope of these young Suns,
to see whether such effect can modify the otherwise near cylindrical profiles
to produce more conical, solar-like profiles.Comment: 32 pages, 18 figures, 2 tables, to appear in Ap
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