Discrimination by Gender and Disability Status: Do Worker Perceptions Match Statistical Measures?

We explore whether perceptions of discrimination are related to ordinary statistical measures. The majority of disabled respondents report feeling some discrimination due to their disability, the majority of women feel some discrimination because of their gender, and a surprising number of men also report some discrimination. We do not find a strong link between perceptions of discrimination and measured discrimination perhaps because those who perceive discrimination feel that it occurs along other dimensions than pay. However, we do find a connection between whether a person feels his or her income is inadequate and measured discrimination for all groups studied

Two-phase choked flow of subcooled oxygen and nitrogen

Data are presented for two-phase critical flow through nozzles. Test results from two converging-diverging nozzles and two separate test facilities are in excellent agreement. The critical flow rate and critical flow pressure ratio data conclusively demonstrate that the principle of corresponding states can be applied to two-phase choked flow through nozzles. Normalizing parameters were developed to correlate these data, and current theories can provide an adequate means for extrapolating to other fluids. Such information can be useful for cryogenic fluid storage applications

Critical flow and pressure ratio data for LOX flowing through nozzles

LOX and LN2 data for two-phase critical flow through nozzles were acquired with precision control. The principal measured parameters were inlet conditions, critical flow rate and critical flow pressure ratio. It is conclusively demonstrated that the principle of corresponding states can be applied to two-phase choked flow through nozzles. It is also shown that the proper normalizing parameters are developed, and that current theories can provide an adequate means for extrapolating data to other fluids

The Critical Tradition at Rhodes University: Retrospect and Prospect

No Abstrac

An alternative approach to a complex issue: Youth-designed strategies for the prevention of teenage pregnancy in schools

Teenage pregnancy of school-going girls is a persistent concern, not only in South Africa, but globally. Despite various curricular responses aimed at educating young people about prevention, the numbers continue to rise. While recognising the intersectionality of teenage pregnancy, we believe that school-based prevention measures can play an important role in helping youth to make healthy decisions about their sexual behaviour. However, the effectiveness of the prevention messages depends on how they are designed and delivered. Using a participatory action research design, we engaged 24 peer educators in a process of data generation and analysis to help them to design, implement and evaluate prevention strategies that were found to be youth-friendly, contextualised and culturally relevant. This approach benefitted not only the participating youth in terms of the development of specific life skills, but also influenced how they, their peers and teachers began to think differently about the issue of teenage pregnancy. The research also influenced change in school policy. The findings thus indicate that the involvement of youth in finding ways to address issues that affect their lives may be an important way to improve the effectiveness of such programmes

Lack of serologic evidence for an association between Cache Valley Virus infection and anencephaly and other neural tube defects in Texas.

We tested the hypothesis that Cache Valley Virus (CVV), an endemic North American bunyavirus, may be involved in the pathogenesis of human neural tube defects. This investigation followed a 1990 and 1991 south Texas outbreak of neural tube defects with a high prevalence of anencephaly and the demonstration in 1987 that in utero infection by CVV was the cause of outbreaks of central nervous system and musculoskeletal defects in North American ruminants. Sera from 74 women who gave birth to infants with neural tube defects in south Texas from 1993 through early 1995 were tested for CVV neutralizing antibody. All tested sera did not neutralize CVV. These data suggest that CVV is not involved in the induction of human neural tube defects during nonepidemic periods but do not preclude CVV involvement during epidemics. Other endemic bunyaviruses may still be involved in the pathogenesis of neural tube defects or other congenital central nervous system or musculoskeletal malformations

Thermomechanical behavior of plasma-sprayed ZrO2-Y2O3 coatings influenced by plasticity, creep and oxidation

Thermocycling of ceramic-coated turbomachine components produces high thermomechanical stresses that are mitigated by plasticity and creep but aggravated by oxidation, with residual stresses exacerbated by all three. These residual stresses, coupled with the thermocyclic loading, lead to high compressive stresses that cause the coating to spall. A ceramic-coated gas path seal is modeled with consideration given to creep, plasticity, and oxidation. The resulting stresses and possible failure modes are discussed