977 resultados para Podolsky-rosen Paradox


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Southern Tiwa (Tanoan) exhibits agreement with up to three arguments (ergative, absolutive, dative). This agreement is subject to certain restrictions resembling the Person-Case Constraint paradigm (Bonet 1991). Moreover, there is a correlation between agreement restrictions and conditions on (the obviation of) noun-incorporation in Southern Tiwa, as explicitly and elegantly captured by Rosen (1990) in terms of a heterogeneous feature hierarchy and rules of association. We attempt to recast Rosen’s central insights in terms of Anagnostopoulou’s probe-sharing model of Person-Case Constraint effects (Anagnostopoulou 2003, 2006), to show that the full range of Southern Tiwa agreement and (non-)incorporation restrictions can be given a single, unified analysis within the probe-goal-Agree framework of Chomsky (2001). In particular, we argue that Southern Tiwa’s triple-agreement system is characterized by (a) an independent class probe located on the heads T and v, and (b) a rule that allows this class probe to be deleted in the context of local-person T-agreement. The various restrictions on agreement and non-incorporation then reduce to a single source: failure of class-valuation with DP (as opposed to NP) arguments.

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Objective: We investigate what role stage at diagnosis bears in international differences in ovarian cancer survival. Methods: Data from population-based cancer registries in Australia, Canada, Denmark, Norway, and the UK were analysed for 20,073 women diagnosed with ovarian cancer during 2004-07. We compare the stage distribution between countries and estimate stage-specific one-year net survival and the excess hazard up to 18 months after diagnosis, using flexible parametric models on the log cumulative excess hazard scale. Results: One-year survival was 69% in the UK, 72% in Denmark and 74-75% elsewhere. In Denmark, 74% of patients were diagnosed with FIGO stages III-IV disease, compared to 60-70% elsewhere. International differences in survival were evident at each stage of disease; women in the UK had lower survival than in the other four countries for patients with FIGO stages III-IV disease (61.4% vs. 65.8-74.4%). International differences were widest for older women and for those with advanced stage or with no stage data. Conclusion: Differences in stage at diagnosis partly explain international variation in ovarian cancer survival, and a more adverse stage distribution contributes to comparatively low survival in Denmark. This could arise because of differences in tumour biology, staging procedures or diagnostic delay. Differences in survival also exist within each stage, as illustrated by lower survival for advanced disease in the UK, suggesting unequal access to optimal treatment. Population-based data on cancer survival by stage are vital for cancer surveillance, and global consensus is needed to make stage data in cancer registries more consistent. © 2012 Elsevier Inc.

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There is a paradox between the remarkable genetic stability of measles virus (MV) in the field and the high mutation rates implied by the frequency of the appearance of monoclonal antibody escape mutants generated when the virus is pressured to revert in vitro (S. J. Schrag, P. A. Rota, and W. J. Bellini, J. Virol. 73: 51-54, 1999). We established a highly sensitive assay to determine frequencies of various categories of mutations in large populations of wild-type and laboratory-adapted MVs using recombinant viruses containing an additional transcription unit (ATU) encoding enhanced green fluorescent protein (EGFP). Single and double mutations were made in the fluorophore of EGFP to ablate fluorescence. The frequencies of reversion mutants in the population were determined by measuring the appearance of fluorescence indicating a revertant virus. This allows mutation rates to be measured under nonselective conditions, as phenotypic reversion to fluorescence requires only either a single-or a double-nucleotide change and amino acid substitution, which does not affect the length of the nonessential reporter protein expressed from the ATU. Mutation rates in MV are the same for wild-type and laboratory-adapted viruses, and they are an order of magnitude lower than the previous measurement assessed under selective conditions. The actual mutation rate for MV is approximately 1.8 x 10(-6) per base per replication event. Copyright © 2013, American Society for Microbiology. All Rights Reserved.

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Although widely debated in broader socioeconomic terms, the Eurozone crisis has not received adequate scholarly attention with regards to the impact of alternative political systems. This article revisits the debate on majoritarian and consensus democracies drawing on recent evidence from the Eurozone debacle. Greece is particularly interesting both with regards to its potential ‘global spillover effects’ and choice of political system. Despite facing comparable challenges as Portugal and Spain, the country has become polarized socially and politically, seeing a record number of MP defections, electoral volatility and the rise of the militant extreme right. The article explains why Greece, the country that relied most extensively on majoritarian institutions, entered the global financial crisis in the most vulnerable position while subsequently faced insurmountable political and institutional obstacles in its management. The article points to the paradox of majoritarianism: in times of economic stress, the first ‘casualties’ are its strongest elements – centrist parties (bi-partisanship) and cabinet stability.

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According to the axiomatic literature on consensus methods, the best collective choice by one method of preference aggregation can easily be the worst by another. Are award committees, electorates, managers, online retailers, and web-based recommender systems stuck with an impossibility of rational preference aggregation? We investigate this social choice conundrum for seven social choice methods: Condorcet, Borda, Plurality, Antiplurality, the Single Transferable Vote, Coombs, and Plurality Runoff. We rely on Monte Carlo simulations for theoretical results and on twelve ballot datasets from American Psychological Association (APA) presidential elections for empirical results. Each of these elections provides partial rankings of five candidates from about 13,000 to about 20,000 voters. APA preferences are neither domain-restricted nor generated by an Impartial Culture. We find virtually no trace of a Condorcet paradox. In direct contrast with the classical social choice conundrum, competing consensus methods agree remarkably well, especially on the overall best and worst options. The agreement is also robust under perturbations of the preference prole via resampling, even in relatively small pseudosamples. We also explore prescriptive implications of our findings.

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Political support for renewable energy development, especially offshore renewables, is particularly conspicuous in Scotland and is a centrepiece of SNP policy. However, this is built on something of a paradox because, put simply, without the subsidies paid by electricity consumers in the rest of the UK, the Scottish Government's ambitious targets for renewable energy would be politically unachievable. We argue in this paper that if Scotland does move towards independence, then there could be little reason for the UK to continue paying (much) of the subsidies since the resulting renewable generation would no longer contribute towards UK renewable energy targets. We suggest that the potential scenarios, and their implications, needs to be far better considered in the arguments around the Scottish constitutional position and the broader aims of UK energy policy.

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The preface paradox does not show that it can be rational to have inconsistent beliefs, because preface writers do not have inconsistent beliefs. I argue, first, that a fully satisfactory solution to the preface paradox would have it that the preface writer's beliefs are consistent. The case here is on basic intuitive grounds, not the consequence of a theory of rationality or of belief. Second, I point out that there is an independently motivated theory of belief--sensitivism--which allows such a solution. I sketch a sensitivist account of the preface writer's (consistent) doxastic state.

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The equiprobability bias (EB) is a tendency to believe that every process in which randomness is involved corresponds to a fair distribution, with equal probabilities for any possible outcome. The EB is known to affect both children and adults, and to increase with probability education. Because it results in probability errors resistant to pedagogical interventions, it has been described as a deep misconception about randomness: the erroneous belief that randomness implies uniformity. In the present paper, we show that the EB is actually not the result of a conceptual error about the definition of randomness. On the contrary, the mathematical theory of randomness does imply uniformity. However, the EB is still a bias, because people tend to assume uniformity even in the case of events that are not random. The pervasiveness of the EB reveals a paradox: The combination of random processes is not necessarily random. The link between the EB and this paradox is discussed, and suggestions are made regarding educational design to overcome difficulties encountered by students as a consequence of the EB.

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Since the late nineteenth-century works of criminologists Lombroso and Lacassagne, tattoos in Europe have been commonly associated with deviant bodies. Like many other studies of tattoos of non-indigenous origin, the locus of our research is the convict body. Given the corporeal emphasis of prison records, we argue that tattoos form a crucial part of the power dynamic. Tattoos in the carceral context embody an inherent paradox of their being a component in the reidentification of 'habitual criminals'. We argue that their presence can be regarded as an expression of convict agency: by the act of imprinting unique identifiers on their bodies, convicts boldly defied the official gaze, while equally their description in official records exacted power over the deviant body. Cursory findings show an alignment with other national studies; corporeal inscriptions in Ireland were more prevalent in men's prisons than women's and associated, however loosely, with certain occupations. For instance, maritime and military motifs find representation. Recidivists were more likely to have tattoos than first-time offenders; inscriptions were described as monotone, rudimentary in design and incorporated a limited range of impressions. Further to our argument that tattoos form an expression of convict defiance of prison authority, we have found an unusual idiosyncrasy in the convict record, that is, that the agency of photography, while undermined in general terms, was manipulated by prison officers.

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BACKGROUND: The liver fluke Fasciola hepatica is a major pathogen of livestock worldwide, causing huge economic losses to agriculture, as well as 2.4 million human infections annually.

RESULTS: Here we provide a draft genome for F. hepatica, which we find to be among the largest known pathogen genomes at 1.3 Gb. This size cannot be explained by genome duplication or expansion of a single repeat element, and remains a paradox given the burden it may impose on egg production necessary to transmit infection. Despite the potential for inbreeding by facultative self-fertilisation, substantial levels of polymorphism were found, which highlights the evolutionary potential for rapid adaptation to changes in host availability, climate change or to drug or vaccine interventions. Non-synonymous polymorphisms were elevated in genes shared with parasitic taxa, which may be particularly relevant for the ability of the parasite to adapt to a broad range of definitive mammalian and intermediate molluscan hosts. Large-scale transcriptional changes, particularly within expanded protease and tubulin families, were found as the parasite migrated from the gut, across the peritoneum and through the liver to mature in the bile ducts. We identify novel members of anti-oxidant and detoxification pathways and defined their differential expression through infection, which may explain the stage-specific efficacy of different anthelmintic drugs.

CONCLUSIONS: The genome analysis described here provides new insights into the evolution of this important pathogen, its adaptation to the host environment and external selection pressures. This analysis also provides a platform for research into novel drugs and vaccines.

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Compassion is at the forefront of national and international healthcare policy, practice and educational debates as a result of a series of recent reports (Mid Staffordshire NHS Foundation Trust Inquiry, 2010, Lown et al 2011, Mannion, 2014). Arguably, this emphasis on compassion is in juxtaposition to an increasingly complex technological healthcare system focused upon outcomes, efficiency, productivity and competence. Within this fast paced and time pressured environment innovative strategies are required to cultivate and sustain compassion among healthcare professionals.

Understanding the person’s experience of illness and making an emotional connection are key processes in cultivating compassion (Dewar, 2013). The exponential growth in unsolicited patient narratives has the potential to provide invaluable insight into what matters to patients and their experience of illness. For many patients these stories ‘reclaim’ their illnesses from the traditional biomedical model of disease and reveal otherwise hidden aspects of their experience. The content though freely accessible, is however unedited and lacks safeguards in relation to the quality or accuracy of the information provided. Despite these concerns, healthcare professionals are now challenged to pay attention to these unsolicited patient stories and to consider how they can inform and improve patient care.

This paper discusses the use of online patient narratives in undergraduate nurse education to cultivate compassion. Critical analysis of online patient narratives is advocated as a potential educational strategy to cultivate compassion among future health care professionals.

References
Dewar,B. (2013) Cultivating compassionate care Nursing Standard 27, (34) 48-55

Lown B, Rosen J, Martilla J.(2011) An agenda for improving compassionate care: a survey shows about half of patients say such care is missing. Health Affairs (Millwood) 30, 1772–8.
Mannion,R. (2014) Enabling compassionate healthcare: perils, prospects and perspectives International Journal of Health Policy and Management 2, 115-7
Mid Staffordshire NHS Foundation Trust Inquiry (2010). Independent Inquiry into care provided by Mid Staffordshire NHS Foundation London: Stationery Office.

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We consider a normal form game in which there is a single exogenously given coalition of cooperating players that can write a binding agreement on pre-selected actions. These collective actions typically represent a certain number of dimensions in the players’ strategy space. The actions represented by the other dimensions of the strategy space remain under the complete, individual control of the players.
We consider a standard extension of the Nash equilibrium concept denoted as a partial cooperative equilibrium as well as an equilibrium concept in which the coalition of cooperators has a leadership position. Existence results are developed for these new equilibrium concepts. We identify conditions on these partial cooperative games under which the various equilibrium concepts are equivalent.
We apply this game theoretic framework to existing models of multi-market oligopolies and international pollution abatement. In a multi-market oligopoly typically a merger paradox emerges in the partial cooperative equilibrium, which vanishes if the cartel of collaborators exploits its leadership position. Our application to international pollution abatement treaties shows that cooperation by a sufficiently large group of countries results in a Pareto improvement over the standard tragedy of the commons outcome described by the Nash equilibrium.

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The mode I and mode II fracture properties of the FM300-2 adhesive bond between 5HS/RTM6 laminates are determined experimentally by DCB and ELS test. The crack propagation is studied numerically by means of interface elements based on the decohesive zone model. The latter is characterized by material degradation, which is usually assumed to be linear. In the present study it is shown that if a non-linear material degradation is used with an increased magnitude of the interface relative displacement at failure it is possible to model more correctly the experimentally observed significant non-linear behaviour before the start of crack propagation. An adhesive stepped flush joint is studied experimentally and numerically. A mixed mode interaction criterion is used together with the nonlinear material degradation of the interface. Sensitivity studies are performed to study the influence of the parameters defining it.