Cambridge: Cambridge University Press, 2022. Just as Aristotle (Metaphysics 2.995a7) records how some poetry can serve as a μάρτυς for supporting propositions, and Quintilian (Inst. 2.7.4) believes ...that such citations contribute ‘more authority’, so too Cicero knows that literary excerpts can have a significant pay-off. ...Chapter 5, ‘Poetry as Artefact’, gathers together various threads relating to historical enquiry: how Cicero used ancient poetry (especially Ennius and Lucilius) to learn about the past, either as it was or – what in practice amounts to the same thing – how we should choose to remember it. More statistical analysis of the welter of material gathered in the appendices would have been valuable, if readers could be given not just numerical figures but also frequencies of citation (of all verse and of individual authors) weighed against the size of text.
Taking Stock Alvarez, Ann Rosegrant; Moxley, David P.; Gutierrez, Lorraine M. ...
Journal of community practice,
12/1/2005, 2005-12-00, Letnik:
13, Številka:
4
Journal Article
Hereditary hemochromatosis (HH) is classically associated with a Cys282Tyr (C282Y) mutation of the HFE gene. Non-C282Y HH is a heterogeneous group accounting for 15% of HH in Northern Europe. ...Pathogenic mutations of the transferrin receptor 2(TfR2) gene have been identified in 4 Italian pedigrees with the latter syndrome. The goal of this study was to perform a mutational analysis of the TfR2 and HFE genes in a cohort of non-C282Y iron overload patients of mixed ethnic backgrounds. Several sequence variants were identified within theTfR2 gene, including a homozygous missense change in exon 17, c2069 A→C, which changes a glutamine to a proline residue at position 690. This putative mutation was found in a severely affected Portuguese man and 2 family members with the same genotype. In summary, pathologic TfR2 mutations are present outside of Italy, accounting for a small proportion of non-C282Y HH.
Taking Stock Alvarez, Ann Rosegrant; Moxley, David P; Gutierrez, Lorraine M ...
Journal of community practice,
01/2005, Letnik:
13, Številka:
4
Journal Article
Recenzirano
Discusses the work of the current editorial staff & provides a brief description of the articles presented in the current issue.
Liquid jet impingement is a technique ubiquitously used to rapidly remove large amounts of heat from a surface. Several different regions of heat transfer spanning from forced convection to nucleate, ...transition, and film boiling can occur very near to one other both temporally and spatially in quenching or high wall heat flux scenarios. Heat transfer involving jet impingement has previously shown dependency both on jet characteristics such as flow rate and temperature as well as surface material properties. Water droplets are known to bead up upon contact with superhydrophobic (SH) surfaces. This is due to reduced surface attraction caused by micro- or nanostructures that, combined with a natively hydrophobic surface chemistry, reduce liquid-solid contact area and attraction, promoting droplet mobility. This remarkable capability possessed by SH surfaces has been studied in depth due to its potential for self-cleaning and shear reduction, but previous research regarding heat transfer on such surfaces shows that it has varying effects on thermal transport. This thesis investigates the effect that quenching initially hot SH surfaces by water jet impingement has on heat transfer, particularly regarding phase change. Two comparative studies are presented. The first examines differences in transient heat transfer from hydrophilic, hydrophobic, and SH surfaces over a range of initial surface temperatures and with jets of varying Reynolds number (ReD), modified by adjusting flow rate. Comparisons of instantaneous local heat flux from the surfaces are made by performing an energy balance over differential control volumes across the surfaces. General trends show increased heat flux, jet spreading velocity and maximum jet spread radius when ReD is increased. An increase in inital surface temperature resulted in increased heat flux across all surfaces, but slowed jet spreading. The local heat flux, average heat rate, and total thermal energy transfer from the surface all confirmed that SH surfaces allow significantly less heat to transfer to the jet compared to hydrophilic surfaces, due to the enhanced Leidenfrost condition and reduced liquid-solid contact on SH surfaces which augments thermal resistance. The second study compares jet impingement heat transfer from SH surfaces of varying microstructures. Similar thermal effects due to modified jet ReD and initial surface temperature were observed. Modifying geometric pattern from microposts to microholes, altering cavity fraction, and changing feature pitch and width had little impact on heat transfer. However, reducing feature height on the post surfaces facilitated water penetration within the microstructure, slightly enhancing thermal transport.
To analyze population-based trends in cataract extraction.
Rochester Epidemiology Project databases; which capture virtually all health care services provided to residents of Olmsted County, ...Minnesota, were used to perform retrospective cohort analyses of rates of primary cataract extractions performed between 1980 and 1994.
The population of Olmsted County, Minnesota.
Incidence rates adjusted to the age and sex distribution of the 1990 US white population were analyzed using Poisson regression.
The 4257 procedures performed on 3176 patients of all ages represented overall annual age-adjusted rates of 404 procedures per 100,000 females and 320 per 100,000 males. Annual age- and sex-adjusted rates for both sexes combined rose from 133 procedures per 100,000 in 1980 to a peak of 507 per 100,000 in 1992. The rates fell to 470 per 100,000 in 1994. Manual review of a random sample of records estimated case overascertainment at 0.9%.
With the exception of 1988 and 1989, rates of cataract surgery in this geographically circumscribed population increased every year between 1980 and 1992. Data from 1993-1994 indicate that rates may have plateaued and possibly declined slightly. If sustained, these patterns could have major implications for future utilization of ophthalmologic resources.
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