Articles by Author: Wayne C Packer

Search results for Wayne C Packer

We found 16 results for you
  1. Multiple strategies for resilient livelihoods in communal areas of South Africa

    Multiple strategies for resilient livelihoods in communal areas of South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Livestock farming in communal areas is an activity pursued by rural households as one of a range of livelihood strategies aimed at spreading risk. The cash and non-cash benefits derived from livestock, as well as the wide range of secondary...
  2. HIV/AIDS Education in Butare-ville Secondary Schools (Rwanda): Analyzing Pedagogic Discourse Using a Bernsteinian Framework

    HIV/AIDS Education in Butare-ville Secondary Schools (Rwanda): Analyzing Pedagogic Discourse Using a Bernsteinian Framework

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This article presents three case studies of how HIV/AIDS education is being organized and taught in Rwanda. It analyses what teachers were doing in 2005 through classroom teaching to safeguard young people from HIV/AIDS. A pedagogic framework is introduced and...
  3. Vertex coverings by coloured induced graphs — Frames and Umbrellas

    Vertex coverings by coloured induced graphs — Frames and Umbrellas

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A graph G homogeneously embeds in a graph H if for every vertex x of G and every vertex y of H there is an induced copy of G in H with x at y. The graph G uniformly embeds...
  4. WHICH TREES ARE UNIQUELY FRAMED BY THE HEAWOOD GRAPH?

    WHICH TREES ARE UNIQUELY FRAMED BY THE HEAWOOD GRAPH?

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A graph F is called a frame of a graph G if F is a graph of minimum order having the property that for every vertex x of G and every vertex y of F, there exists and embedding of...
  5. SOME GENERAL ASPECTS OF THE FRAMING NUMBER OF A GRAPH

    SOME GENERAL ASPECTS OF THE FRAMING NUMBER OF A GRAPH

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    A graph G is homogeneously embedded in a graph H if for every vertex x of G and every vertex y of H, there exists an embedding of G in H as an induced subgraph with x at y. A...
  6. Key determinants of AIDS impact in Southern sub-Saharan Africa

    Key determinants of AIDS impact in Southern sub-Saharan Africa

    Item type: Journal Article • Journal: African Journal of AIDS Research
    To investigate why Southern sub-Saharan Africa is more severely impacted by HIV and AIDS than other parts of sub-Saharan Africa, I conducted a review of the literature that assessed viral, host and transmission (societal) factors. This narrative review evaluates: 1)...
  7. Performance of simple irrigation scheduling calendars based on average weather data for annual ryegrass

    Performance of simple irrigation scheduling calendars based on average weather data for annual ryegrass

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Poor irrigation management in pastures can lead to yield and quality reduction as well as loss of income through extra pumping and leaching of nitrate fertiliser. A number of irrigation scheduling techniques of varying levels of sophistication have been developed...
  8. The disjunctive domination number of a graph

    The disjunctive domination number of a graph

    Item type: Journal Article • Journal: Quaestiones Mathematicae
    For a positive integer b, we define a set S of vertices in a graph G as a b-disjunctive dominating set if every vertex not in S is adjacent to a vertex of S or has at least b vertices...
  9. Seasonal dry matter production, botanical composition and forage quality of kikuyu over-sown with annual or perennial ryegrass

    Seasonal dry matter production, botanical composition and forage quality of kikuyu over-sown with annual or perennial ryegrass

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The seasonal growth and low forage quality of kikuyu restrict milk production. The aim of this study was to determine the yield and nutritional value of irrigated kikuyu over-sown with perennial, Italian or Westerwolds ryegrass grazed by dairy cows. The...