Some notes on the fisher–bingham family on the sphere

The fisher–Bingham family is potentially useful class of spherical distributions, but its practical application has been hindered by various problems, including; the identification of the form of the distribution, given the parameter values; and finding an effective technique for calculating the normalising constant, a requirement for maximum likelihood estimation. It is explained how these difficulties can be resolved. and then parameter estimation and hypothesis testing are discussed. A practical example is given.     

Generalized EM estimation for semi-parametric mixture distributions with discretized non-parametric component

We consider independent sampling from a two-component mixture distribution, where one component (called the parametric component) is from a known distributional family and the other component (called the non-parametric component) is unknown. This is a semi-parametric mixture distribution. We discretize the non-parametric component and estimate the parameters of this mixture model, namely the mixing proportion, the unknown parameters of the parametric component and the discretized non-parametric component. We define the maximum penalized likelihood (MPL) estimates of the mixture model parameters and then develop a generalized EM (GEM) iterative scheme to compute the MPL estimates. A simulation study and an example from biology are presented.     

Public Sociology: Working at the Interstices

The article examines recent debates surrounding public sociology in the context of a UK based Department of Applied Social Sciences. Three areas of work within the department form the focus of the article: violence against women and children; community-based oral history projects and health ethics teaching. The article draws on Micheal Burawoy’s typology comprising public, policy, professional and critical sociology, and argues that much of the work described in the case studies more often lies somewhere in between, in the interstices, rather than within one or other of the four types. The result is not without its tensions and dilemmas, some of which are identified and explored, notably those arising from attempts to appeal to diverse audiences and meet the sometimes conflicting expectations of each.     

Is the Relationship between Socioeconomic Status and Health Stronger for Older Children in Developing Countries?

Recent research on the relationship between child health and income in developed countries reveals a positive gradient that is more pronounced for older children, suggesting that the impact of income upon health accumulates. This article examines whether the same is true in a developing country. Using data from the Indonesian Family Life Survey on children aged 0 to 14 years, we find that although low income adversely affects health, its impact does not differ by age. This finding is robust to the use of both subjective and objective health measures, controlling for selective mortality, the use of alternative measures of households’ resources, and the inclusion of indicators of health at birth and parental health. One explanation for the constancy of the health-income relationship that we explore is the dominant role played by acute illness in determining the general health status of children in a developing-country context compared with the more central role played by chronic conditions in developed countries.     

Effects of 12 weeks of Nordic Walking and XCO Walking training on the endurance capacity of older adults

Background

Several studies have already examined the positive effects of various forms of endurance training in patient groups and in healthy adults up to 60 years old. The aim of this study was to analyse the effects of Nordic Walking (NW) and XCO Walking (XCO) training on endurance capacity in healthy older adults, aged 60 years and older.

Methods

Twenty-three older participants (mean age: 69.9 ± 5.4 years) were randomly assigned to either the NW group or the XCO group. All participants were measured before and after the 12 weeks of endurance training (2 sessions/week) to examine oxygen uptake (VO₂) and energy consumption during an outdoor field test. In addition, heart rates were recorded and lactate samples were collected.

Results

NW mainly demonstrated some significant (p < 0.05) decreases in heart rate, lactate concentration at lower to moderate walking speeds, whereas XCO Walking revealed significant (p < 0.05) decreases in lactate concentration and VO₂ at low to higher walking speeds.

Conclusions

NW as well as XCO training increase the efficiency of the cardio-vascular system in older subjects. Both training approaches are suitable options for endurance training, which may serve to counteract age- and inactivity-related decreases in cardio-vascular functioning as well as aid in maintaining overall performance in older adults.

     

Educating student midwives around dignity and respect

Focus

There is currently limited information available on how midwifery students learn to provide care that promotes dignity and respect.