Passive Drip Stain Formation Dynamics of Blood onto Hard Surfaces and Comparison with Simple Fluids for Blood Substitute Development and Assessment,

The spreading dynamics of blood dripping onto hard surfaces is compared to two spreading models. Samples of human blood, porcine blood, and Millipore^® water were dripped onto cardboard, foamcore, and glass surfaces in low velocity passive drip simulations. Final stain diameter, the total number of spines and scallops, and angle of impact were measured and analyzed. Spreading is best predicted by applying the concept of effective viscosity to the Scheller and Bousfield (R² = 0.91) and Roisman (R² = 0.89) spreading models. In the tested conditions, blood spreads with Newtonian tendencies; however, has quantifiable differences in stain appearance to Newtonian fluids like water. This is encouraging for the development of water‐based fluids as synthetic blood substitutes (SBSs). The work presents an assessment platform to quantify and score the performance of simple water‐based fluids using final stain diameter (6 points) and number of spines and scallops (6 points) at six dripping heights between 20 and 120 cm. The angle of impact of a stain alone is not a sensitive measure of SBS performance, but stain formation scores the SBS's performance with another 1 point. Together these features generate a quantitative relative ranking system, of a maximum possible 13 points, that can be used to support the use of a particular fluid for the creation of a drip stain. The performance of twenty simple fluids in the simulated dripping assessment test is described.     

Reflections on a course on ‘women and literature’

The authors outline the place of their course in a Polytechnic Humanities Degree and show how, concentrating primarily upon the novel and a line of women novelists from Jane Austen to Doris Lessing, new perspectives upon literary criticism and literary history in relation to society and culture are opened up. Teaching methods and attitudes are discussed in relation to the re-evaluation of the role of women as readers and critics, as well as authors. The success of the course, in terms of the interest it has aroused among students in women authors and feminist criticism is discussed, together with the effects of open recognition of differences of emphasis and point of view between the two tutors responsible for it. The authors express their confidence in the course as undermining a harmful acceptance of the idea of a single established literary tradition, which ‘happens’ to be dominated by white, male authors and critics, thus opening the way for students to appreciate how, as Adrienne Rich puts it, ‘there is another story to be told’.     

The Welsh Office and Welsh Autonomy

This article examines the claim that, by the late 1980s, the Welsh Office possessed sufficient autonomy to implement policies that diverged from those of the functional Whitehall ministries. Two case studies, housing and education, are examined as these are areas where institutional autonomy and distinctive needs might be expected to be most apparent in Wales. The conclusion of this article is that the claims of Welsh exceptionalism (certainly in terms of policies) have been much exaggerated and that the 'centre', Westminster and Whitehall, was able to impose its preferred policies in Wales, whatever appearances to the contrary.     

Natural helpers: a community approach to harm reduction

This paper, by Jennifer Taylor and Theresa Jasperson, looks at a successful harm-reduction initiative developed by Streetworks, a needle exchange program in Edmonton, Alberta. The Natural Helpers initiative provides and enhances the skills, knowledge, resources, and support that people who use injection drugs need in order to take care of others in their community. The evolution of the project, from its inception to the present situation, is described.     

Channeling frustrations: institutions, economic fluctuations, and political behavior

While the literature suggests that clear lines of responsibility lead to greater incumbent dependence on economic conditions for support, little has been said about how electorates channel frustrations in systems characterized by 'fuzzy' lines of responsibility, i.e., the shape and status of parliamentary government in relation to possible choice of electors open to them. The argument presented here is that fuzzy lines of responsibility result in lower incentives to participate in political processes and greater system dissatisfaction given economic circumstances. This decline is greater in systems in which incumbent responsibility is less easily identified by the individual citizen. To test this, data are collected from eight European nations over the period 1975–1992. Split sample and slope intervention models with robust estimation are employed at the individual level. System level aggregates are analyzed using pooled time–series analysis to confirm individual level findings. Finally, election turnout data are also analyzed to obtain election level verification of survey findings. Evidence suggests that participation is more heavily influenced by economic conditions in fuzzy settings. Coupled with existing literature, this suggests that while clear settings encourage punishment of the incumbent unclear settings tend to cause individuals to become more withdrawn and alienated. However, economic conditions are also important to overall system effects. The findings herein suggest that unclear or fuzzy settings increase the role of economic conditions in determination of system affect.