457 research outputs found
The Role of Betrayal in Selected Drama of Tennessee Williams
Much of the critical analysis of Tennessee Williams\u27 drama concerns itself with the inherent conflict between ideals and reality in the universe as perceived by Williams. Such analysis, however, has not considered this conflict as a source of betrayal, or betrayal as a dominant theme in Williams\u27 drama. In at least four of his plays it becomes evident how each of the individual characters in Williams\u27 drama endures the conflict of reality and ideals, and the extent to which their respective approaches to the resolution of this struggle result in betrayal. Four plays--all regarded as among his most successful and most important, and spanning much of his career--were selected for consideration. The plays are The Glass Menagerie, A Streetcar Named Desire, Cat on a Hot Tin Roof, and The Night of the Iguana.
In all four plays betrayal has been a primary ingredient of the action. There is also a similarity in the manner in which the betrayals are structured in each play. In each instance at least one betrayal has occurred prior to the action of the drama. The betrayals that occur during the action of the play stem from this initial conflict. In two instances, A Streetcar Named Desire and Cat on a Hot Tin Roof, Williams uses the birth of a child at the end of the play to suggest a setting for future betrayals.
Three types of betrayals occur in these plays: self-betrayal, betrayal of ideals, and betrayal of others. Williams indicates through the characters\u27 reactions to the betrayals what they value and what his own views on betrayal are. His view is that betrayal is an inevitable occurrence in life as a result of the conflict between reality and ideals. He therefore is not inclined to pass judgement on the morality of betrayals, but he is offended by the cruelty with which the betrayal of others is often levied. He views self-betrayal resulting from an attempt to retain belief in ideals as tragic in the earlier plays (The Glass Menagerie and A Streetcar Named Desire). In Cat on a Hot Tin Roof there is some progression toward the tentative ability of the protagonist to resolve the conflict and thus avoid ultimate destruction by self-betrayal. In The Night of the Iguana Williams makes a definite positive statement as to the individual\u27s ability to resolve the conflict of ideals and reality and thereby avoid destruction by self-betrayal. If The Night of the Iguana represents Williams\u27 most recent position, then he no longer finds it necessary for his characters to betray others in order to insure their own survival, or to dedicate themselves to ideals which ignore reality and result in self-betrayal. It has become possible for the individual to seek and hope for a reconciliation of ideals and reality
Legal issues in NCAA intercollegiate athletics
This paper reviews legal issues related to NCAA intercollegiate athletics. More specifically, the paper will discuss Title IX, discrimination against student athletes with disabilities, drug testing, and other of today\u27s highly publicized legal issues. Legal issues of smaller athletic associations such as the National Association of lntercollegiate Athletics (NAIA) are not addressed in this paper. Rather, the focus is on NCAA institutions, particularly large member institutions at which legal issues have surfaced
Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
We analyze stellar streams in action-angle coordinates combined with recent
local direct acceleration measurements to provide joint constraints on the
potential of our Galaxy. Our stream analysis uses the Kullback-Leibler
divergence with a likelihood analysis based on the two-point correlation
function. We provide joint constraints from pulsar accelerations and stellar
streams for local and global parameters that describe the potential of the
Milky Way (MW). Our goal is to build an ``acceleration ladder", where direct
acceleration measurements that are currently limited in dynamic range are
combined with indirect techniques that can access a much larger volume of the
MW. To constrain the MW potential with stellar streams, we consider the Palomar
5, Orphan, Nyx, Helmi and GD1 streams. Of the potential models that we have
considered here, the preferred potential for the streams is a two-component
Staeckel potential. We also compare the vertical accelerations from stellar
streams and pulsar timing, defining a function , where is the MW potential determined
from stellar streams, and is the vertical acceleration
determined from pulsar timing observations. Our analysis indicates that the
Oort limit determined from streams is consistently (regardless of the choice of
potential) lower than that determined from pulsar timing observations. The
calibration we have derived here may be used to correct the estimate of the
acceleration from stellar streams.Comment: 8 pages, 4 figures, 1 table. Submitted to ApJ Letter
Relaxed Molecular Clock Provides Evidence for Long-Distance Dispersal of Nothofagus (Southern Beech)
Nothofagus (southern beech), with an 80-million-year-old fossil record, has become iconic as a plant genus whose ancient Gondwanan relationships reach back into the Cretaceous era. Closely associated with Wegener's theory of āKontinentaldriftā, Nothofagus has been regarded as the ākey genus in plant biogeographyā. This paradigm has the New Zealand species as passengers on a Moa's Ark that rafted away from other landmasses following the breakup of Gondwana. An alternative explanation for the current transoceanic distribution of species seems almost inconceivable given that Nothofagus seeds are generally thought to be poorly suited for dispersal across large distances or oceans. Here we test the Moa's Ark hypothesis using relaxed molecular clock methods in the analysis of a 7.2-kb fragment of the chloroplast genome. Our analyses provide the first unequivocal molecular clock evidence that, whilst some Nothofagus transoceanic distributions are consistent with vicariance, trans-Tasman Sea distributions can only be explained by long-distance dispersal. Thus, our analyses support the interpretation of an absence of Lophozonia and Fuscospora pollen types in the New Zealand Cretaceous fossil record as evidence for Tertiary dispersals of Nothofagus to New Zealand. Our findings contradict those from recent cladistic analyses of biogeographic data that have concluded transoceanic Nothofagus distributions can only be explained by vicariance events and subsequent extinction. They indicate that the biogeographic history of Nothofagus is more complex than envisaged under opposing polarised views expressed in the ongoing controversy over the relevance of dispersal and vicariance for explaining plant biodiversity. They provide motivation and justification for developing more complex hypotheses that seek to explain the origins of Southern Hemisphere biota
Applying the ROBINS-I tool to natural experiments: an example from public health
Background:
A new tool to assess Risk of Bias In Non-randomised Studies of Interventions (ROBINS-I) was published in Autumn 2016. ROBINS-I uses the Cochrane-approved risk of bias (RoB) approach and focusses on internal validity. As such, ROBINS-I represents an important development for those conducting systematic reviews which include non-randomised studies (NRS), including public health researchers. We aimed to establish the applicability of ROBINS-I using a group of NRS which have evaluated non-clinical public health natural experiments.
Methods:
Five researchers, all experienced in critical appraisal of non-randomised studies, used ROBINS-I to independently assess risk of bias in five studies which had assessed the health impacts of a domestic energy efficiency intervention. ROBINS-I assessments for each study were entered into a database and checked for consensus across the group. Group discussions were used to identify reasons underpinning lack of consensus for specific questions and bias domains.
Results:
ROBINS-I helped to systematically articulate sources of bias in NRS. However, the lack of consensus in assessments for all seven bias domains raised questions about ROBINS-Iās reliability and applicability for natural experiment studies. The two RoB domains with least consensus were selection (Domain 2) and performance (Domain 4). Underlying the lack of consensus were difficulties in applying an intention to treat or per protocol effect of interest to the studies. This was linked to difficulties in determining whether the intervention status was classified retrospectively at follow-up, i.e. post hoc. The overall risk of bias ranged from moderate to critical; this was most closely linked to the assessment of confounders.
Conclusion:
The ROBINS-I tool is a conceptually rigorous tool which focusses on risk of bias due to the counterfactual. Difficulties in applying ROBINS-I may be due to poor design and reporting of evaluations of natural experiments. While the quality of reporting may improve in the future, improved guidance on applying ROBINS-I is needed to enable existing evidence from natural experiments to be assessed appropriately and consistently. We hope future refinements to ROBINS-I will address some of the issues raised here to allow wider use of the tool
Nutrition Can Modulate the Toxicity of Environmental Pollutants: Implications in Risk Assessment and Human Health
Background: The paradigm of human risk assessment includes many variables that must be viewed collectively in order to improve human health and prevent chronic disease. The pathology of chronic diseases is complex, however, and may be influenced by exposure to environmental pollu-tants, a sedentary lifestyle, and poor dietary habits. Much of the emerging evidence suggests that nutrition can modulate the toxicity of environmental pollutants, which may alter human risks associated with toxicant exposures
X-ray Substructure Studies of Four Galaxy Clusters using XMM-Newton Data
Mahdavi et al. find that the degree of agreement between weak lensing and
X-ray mass measurements is a function of cluster radius. Numerical simulations
also point out that X-ray mass proxies do not work equally well at all radii.
The origin of the effect is thought to be associated with cluster mergers.
Recent work presenting the cluster maps showed an ability of X-ray maps to
reveal and study cluster mergers in detail. Here we present a first attempt to
use the study of substructure in assessing the systematics of the hydrostatic
mass measurements using two-dimensional (2-D) X-ray diagnostics. The
temperature map is uniquely able to identify the substructure in an almost
relaxed cluster which would be unnoticed in the ICM electron number density and
pressure maps. We describe the radial fluctuations in the 2-D maps by a
cumulative/differential scatter profile relative to the mean profile within/at
a given radius. The amplitude indicates ~10 fluctuations in the temperature,
electron number density and entropy maps, and ~15 fluctuations in the pressure
map. The amplitude of and the discontinuity in the scatter complement 2-D
substructure diagnostics, e.g. indicating the most disturbed radial range.
There is a tantalizing link between the substructure identified using the
scatter of the entropy and pressure fluctuations and the hydrostatic mass bias
relative to the expected mass based on the M-Yx and M-Mgas relations
particularly at r500. XMM-Newton observations with ~120,000 source photons from
the cluster are sufficient to apply our substructure diagnostics via the
spectrally measured 2-D temperature, electron number density, entropy and
pressure maps.Comment: 44 pages, 16 figures, 3 tables, including some language editing from
ApJ, published in Ap
Older personsā and their caregiversā perspectives and experiences of research participation with impaired decision-making capacity: A scoping review
Background and Objectives: Human research ethics statements support equitable inclusion of diverse groups. Yet older people are under-represented in clinical research, especially those with impaired decision-making capacity. The aim of this study was to identify perspectives and experiences of older persons and their caregivers of research participation with impaired decision-making capacity.
Research Design and Methods: Scoping review of literature and online sources in January-February 2019 (updated June 2020) according to Joanna Briggs Institute methodology and PRISMA Extension for Scoping Reviews. English-language peer-reviewed research articles and Australian online narratives were included. Data were tabulated and narratively synthesized.
Results: From 4171 database records and 93 online resources, 22 articles (2000-2019, 82% United States, 16 first authors) and one YouTube webinar (2018) were initially included; updated searches yielded an additional article (2020) and YouTube webinar (2020). Studies were heterogeneous in terminology, methods and foci, with hypothetical scenarios, quantitative analyses and examination of proxy consent predominating. Participants (n=7331) were older persons (71%), caregivers of older persons with dementia/cognitive impairment (23%) and older persons with dementia/cognitive impairment (6%). Synthesis identified two themes: willingness to participate and decision-making approaches.
Discussion and Implications: Research participation by older persons with dementia may be optimized through reducing risks and burdens and increasing benefits for participants, greater consumer input into study development, and shared and supported decision-making. Older personsā and caregiversā perspectives and experiences of research participation with impaired decision-making capacity require investigation in a greater range of countries and conditions other than dementia, and dissemination through more varied media
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