Biomedical subjects

J Stander

Publications and source records attributed to J Stander.

3 recordsLinked to original sources

PubMed2000

Spatial modelling of individual-level parasite counts using the negative binomial distribution.

We present a spatial model for the mean and correlation of highly dispersed count data, and apply it to individual-level counts of the nematode Wuchereria bancrofti, a parasite of humans which causes the disease lymphatic filariasis. Our model uses the negative binomial distribution, whose shape parameter is a convenient index of over-dispersion. Spatial association is quantified in terms of a characteristic length, which has an intuitive interpretation as the distance over which correlation decreases by half. Demographic surveillance and mapping enable us to include individual-level covariates such as age and sex. We discuss the distinctive features of our model and interpret the results in terms of the epidemiology of lymphatic filariasis and possible implications for control programmes.

Journal Article↗

PubMed1996

[Participative management in nursing service].

The management style of the nursing service manager influences the facilitation of health, quality nursing care and quality work life of the nurses. No evidence of any research in this regard-within the context of nursing service-in South Africa could be found. The concept participative management, as well as the process (with applicable guidelines) therefore requires investigation. The purpose with this article is to isolate (identify and define) the central concepts pertaining to participative management in a nursing service, as well as the exploration and description of the process of participative management (with applicable guidelines). An exploratory, descriptive and qualitative research design was followed. Individual interviews with management experts were conducted. Content analysis of these interviews were done, as well as a literature control. A conceptual definition was formulated by inference of data, as well as the description of the process of participative management, with applicable guidelines. It is recommended that this definition be submitted to further refinement to form the foundation of a model for participative management in a nursing service. It will also be meaningful to research the costs and other implications related to participative management in a nursing service.

Decision Making, Organizational↗

PubMedDate not supplied

Mammalian pheromone studies, VII. Identification of thiazole derivatives in the preorbital gland secretions of the grey duiker, Sylvicapra grimmia, and the red duiker, Cephalophus natalensis.

2-Isobutyl-1,3-thiazole and its 4,5-dihydro derivative were identified in the preorbital gland secretions of the grey duiker, Sylvicapra grimmia, and the red duiker, Cephalophus natalensis, but are absent from the preorbital secretion of the blue duiker, C. monticola. These two compounds which are present in high, but varying concentrations in the secretions of male grey duikers, are present in low concentrations in the secretions of females. This seems to be the only consistent significant difference between the secretions of male and female grey duikers and together with the fact that only males mark out their territories, was construed as evidence in favour of these two compounds playing a significant role in the territorial behaviour of male grey duikers.

Animals↗