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This study details the characterization of a glass sample exposed to hyperalkaline water and calcium-rich sediment for an extended time period (estimated as 2 - 70 years) at a lime (CaO) waste site in the UK. We introduce this site, known as Peak Dale, in reference to its use as a natural analogue for nuclear waste glass dissolution in the high pH environment of a cementitious engineered barrier of a geological disposal facility. In particular, a preliminary assessment of alteration layer chemistry and morphology is described and the initiation of a long-term durability assessment is outlined.
The interaction of Stokes’ edge waves with a developing near-shore ice zone is examined from two points of view. First, the effect of a well-fragmented ice suspension on the classical Stokes’ edge wave is discussed. Secondly, the possibility that ice-cusp formation (and, thereafter, ice mounds or volcanoes) can be initiated by edge waves is examined. Results indicate a negligible effect of a well-fragmented floating ice field on the Stokes’ dispersion equation for typical wave periods, but do indicate that the presence of a standing Stokes’ edge wave may lead to the initiation of ice-field cusps as ice formation occurs in the near-shore zone.
Selected isolates of Phytophthora infestans from around England and Wales were fingerprinted using both RG57, a multi-locus RFLP probe, and Amplified Fragment Length Polymorphisms (AFLPs). The larger number of polymorphisms detectable with the AFLP method allowed resolution of several similar AFLP genotypes among isolates with identical RG57 fingerprints. However, some isolates with the same RG57 genotype had remarkably dissimilar AFLP genotypes, suggesting that there has been convergent evolution of some RG57 fingerprints. Also, some isolates with dissimilar RG57 fingerprints had similar or identical AFLP fingerprints. Both techniques distinguished isolates of mitochondrial DNA haplotype Ia from those of haplotype IIa. However, with AFLPs only, most of the isolates of A2 mating type were very similar and were distinguished from those of A1 mating type, suggesting that gene flow between A1 and A2 genotypes is limited and that sexual recombination is rare.
The present study examined responses on the Fear Questionnaire (FQ) of 68 patients suffering panic disorder with agoraphobia, 50 social phobics, 75 subjects with ‘non-clinical’ panic attacks, and 188 non-panicking controls. The FQ agoraphobia and social subscales had satisfactory internal consistency and were accurate (82%) in correctly differentiating the patients. In general, the patient and control groups differed as expected. The highest level of social fear was reported by social phobics and the highest level of agoraphobic fear was reported by patients with panic disorder and agoraphobia. Five items from these two subscales significantly differentiated social phobia from panic disorder with agoraphobia. The results support the reliability and validity of the FQ.
Tombstones furnish perhaps three-quarters of the entire corpus of Latin inscriptions. Many of these give no more than the name of the deceased, but tens of thousands also offer the historian a few additional details, such as age at death and the name and relationship of the commemorator. Previous studies of the tombstones en masse have focused on nomenclature and age at death. In this study we wish to ask what conclusions can be drawn from the data about the commemorator's relationship with the deceased.
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