The “problem” of U.S. press reporting on Chile during the Allende period is by now well documented. What emerges from articles by journalists, journalism professors, and professors interested in Latin American affairs is a relatively consistent picture of U.S. news media performance: the U.S. press was openly hostile to the Popular Unity government in Chile; maintained its hostile perspective with astonishing homogeneity throughout the United States; and often reduced complex social, economic, and political issues to some of the most disturbing stereotypes found in the cold-war period. The same articles suggest, moreover, that reporting on Chile was not a total aberration but rather related to more general patterns of reporting on Latin America.

The central problem of epistemology is to give an account of when beliefs are justified. Traditional epistemological theories are ‘internalist’ in the sense that they make justification entirely a matter of what beliefs one has and what sensory states, mnemonic states, etc., one is in. But there is a currently popular move in epistemology to import ‘external’ considerations of reliability into matters of justification. The feeling is that if a particular belief forming mechanism is to issue in justified belief, then ‘surely it must be reliable.’ Thus it is proposed that reliability is either a necessary condition, or a sufficient condition, or both, for justified belief.

Fatigue cracking in polycrystalline NiTi was investigated using a multiscale experimental framework for average grain sizes (GS) from 10 to 1500 nm for the first time. Macroscopic fatigue crack growth rates, measured by optical digital image correlation, were connected to microscopic crack opening and closing displacements, measured by scanning electron microscope DIC (SEM-DIC) using a high-precision external SEM scan controller. Among all grain sizes, the 1500 nm GS sample exhibited the slowest crack growth rate at the macroscale, and the largest crack opening level (stress intensity at first crack opening) and minimum crack opening displacements at the microscale. Smaller GS samples (10, 18, 42, and 80 nm) exhibited nonmonotonic trends in their fatigue performance, yet the correlation was strong between macroscale and microscale behaviors for each GS. The samples that exhibited the fastest crack growth rates (42 and 80 nm GS) showed a small crack opening level and the largest crack opening displacements. The irregular trends in fatigue performance across the nanocrystalline GS samples were consistent with nonmonotonic values in the elastic modulus reported previously, both of which may be related to the presence of residual martensite only evident in the small GS samples (10 and 18 nm).

This study offers the first systematic analysis of the impact of press-state relations, or media systems, on the HIV/AIDS news agenda in African news coverage. The premise is that media systems play a determining role in the degree to which journalists can independently advocate for social change when covering HIV/AIDS. Drawing on comparative research, four sub-Saharan countries were categorized into two media systems: Contained Democratic (South Africa, Nigeria) and Repressive Autocratic (Zimbabwe, Kenya). A sample of HIV/AIDS stories (n = 393) published from 2002–2007 in each country's leading Anglophone newspaper was content analyzed. Across all coverage, the topic of social costs was framed more for the responsibility borne by nongovernmental agents than governmental agents. In Contained Democratic media systems, however, story emphasis shifted toward government agents taking responsibility for addressing the social costs of HIV/AIDS. Prevention campaigns were framed more as progress than decline across all newspapers; however, campaigns were reported as being more efficacious in Contained Democratic systems than in Repressive Autocratic systems. No impact of media system on framing of medical developments was found. Results show the value of comparative analysis in understanding the agenda-setting process: with greater emphasis on positive efficacy and government initiative, the news agenda in Contained Democratic media systems can facilitate stronger positive societal-level responses than the news agenda in Repressive Autocratic media systems.

We examine the development of stable bimetal interfaces in nanolayered composites in severe plastic deformation. Copper-niobium multilayers of varying layer thicknesses from several micrometers to 10 nanometers (nm) were fabricated via accumulative roll bonding (ARB). Investigation of their 5-parameter character and atomic scale structure finds that when layer thicknesses refine well below one micrometer, the interfaces self-organize to a few interface orientation relationships. With atomic scale and crystal plasticity modeling, we identify that the two controlling factors that determine whether an interface is stable under high strain rolling are orientation stability of the bicrystal and interface formation energy. A figure-of-merit is introduced that not only predicts the development of the prevailing interfaces but also explains why other interfaces did not develop. Through a suite of nanomechanical and bulk test results, we show that ARB composites containing these stable interfaces are found to have exceptional hardness (∼4.5 GPa) and strength (∼2 GPa).

We examined the cocoons of six species of the genera Apanteles and Dolichogenidea attacking spruce budworm, Choristoneura fumiferana Clemens, and Microlepidoptera in the same microhabitat in an effort to overcome taxonomic and ecological problems associated with the identification of these species when adults fail to emerge from their cocoons. Neither cocoon length nor width nor ratio of length to width could be used to identify the six species, owing to considerable overlap in these attributes among the species and the effects of the source of the cocoons. Using a simple technique to examine webbing characteristics of the cocoons, however, we found that each species has a unique banding pattern, determined by the manner in which the density of the webbing varies along the length of the cocoon. This pattern can be used to reliably identify each species. We describe and illustrate the webbing characteristics of each species and provide an identification key based on these characteristics.

UK policy promotes third sector organisations as providers of NHS funded health and social care. We examine the evidence for this policy through a systematic literature review. Our results highlight several problems of studies comparing non-profits with other provider forms, questioning their usefulness for drawing lessons outside the place of study. Most studies deem contextual factors and the regulatory framework in which providers operate as much more important than ownership form. We conclude that the literature does not support the policy of a larger role for the third sector in healthcare, let alone a switch to a market-based system.

Pump-probe imaging of femtosecond pulsed laser ablation was performed to investigate the mechanical shock induced on an intermetallic superalloy CMSX-4 during femtosecond laser machining. Time resolved shadowgraphic images were collected of the shock wave produced in the air above the target following laser exposure (0-10.3 nanoseconds). The dimensions of the shock wave were measured as a function of delay time and laser fluence (1.27 J/cm2 - 62.8 J/cm2). Time-resolved shadowgraphic images of the ablation event will be presented, and the corresponding damage morphology as a function of incident laser fluence will be discussed.

In this paper, the response to temperature of three physiological processes has been examined in detail in seedlings of sorghum and pearl millet. These have been compared with their field performance under high temperature conditions with the aim of developing laboratory-based screening techniques for seedling thermotolerance. Membrane thermostability, as assessed by electrolyte leakage, seedling re-growth and protein synthetic ability were measured in seedlings exposed to a range of temperatures using a thermal gradient bar. The effect of genotype, seedling age and pre-treatment was examined. Differences between genotypes were only apparent after seedlings had been given a brief high temperature pre-treatment (2 h at 43°C). Similar results were found with all three methods used and their suitability for use in the screening of large numbers of entries is discussed. Significant correlation was found between the ability of membrane thermostability to acclimate and seedling survival in the field.

Implanted glassy carbon (GC; 50 keV, 1016 N+ cm-2) is reported to be 400 times more wear-resistant to 1 μm diamond polishing than unimplanted GC. A number of samples were implanted with 15N to produce the modified surface layer and to allow a very high sensitivity measurement of wear, using the 15N(p, α)12C nuclear reaction.

Optical interferometric wear measurements are also reported. Samples implanted with 1 MeV N to 1015 ions cm-2 indicated that the enhanced wear-resistance is correlated with the nuclear energy loss density within the ion range. Mechanisms likely to be responsible for the enhanced wear resistance are also discussed.

Comparative wear data for unimplanted and implanted (50 keV, 5 × 1015 N+ cm−2) glassy carbon (GC) and pyrolytic carbon (PC) are reported. The implanted GC is about 120 times more resistant to diamond abrasion than unimplanted GC and at least 10 times more resistant than PC. In sliding tests, using a ruby ball as the abrader, the implanted GC is almost unaffected for the conditions employed (50 g load, 30,000 revs) compared with the unimplanted GC and unimplanted PC each of which endured measurable wear. The reasons for the enhancement of wear resistance and the ease with which 1–2 μm thick layers may be produced are discussed.

Significantly improved wear properties are described for glassy carbon following implantation with 2 MeV helium and 50 keV nitrogen to doses in the range 1015–1017 ions cm−2. Implanted material is up to 100 times more wear resistant to diamond abrasion than unimplanted material. Enhanced wear resistance is available at the surface with nitrogen but lies below the surface with helium, reflecting the difference in modified depth associated with implant energy and ion mass. Unusually for ion implantation, dose related surface compaction is observed for both nitrogen and helium. Changes in microstructure during implantation with particular regard to collision processes and amorphisation of the graphitic fraction of glassy carbon are discussed.