M.Ed. (Educational Psychology) / In the context of poverty, political turmoil and HIV/AIDS, it has become more difficult for parents to take care of their children accordingly. This problem is especially pronounced in Africa and contributes to the formation of child- and youth-headed households (CYHHs). The emergence of such households places children and youth at risk of vulnerability to exploitation, poverty and lack of access to education and resources. This means that these children and youth need to fend and provide for themselves. Given the dominant position of boys in African cultures, they may be in a better position to take care of and provide for their families. Therefore, the aim of this study is to describe and understand the gendered experiences of 12- to 14-year-old African male learners living in CYHHs and, based on this, to suggest possible support interventions to assist them. A qualitative multiple case study design was used, where seven male learners from the Soweto area participated in the data collection process. These learners were identified through a non-profit organisation (NPO) in the Soweto area. The data collection process included the use of individual interviews, collages, and essays. These were analysed using qualitative content analysis methods, as stipulated by Zhang and Wildemuth (2009). The study is explorative in nature and, given the issues of gender being addressed, a social constructionist paradigm was used. The theoretical framework included the works of two prominent theorists in the field of developmental psychology – Erikson (1963, 1968) and Nsamenang (1992, 2005, 2006). Erikson provides valuable insights into the psychosocial experiences of adolescents, whereas Nsamenang explains the relevance of development in an African context. Their ideas were used to understand the findings in relation to the development of the participants.

Preservation of large tracts of habitat is often recommended for long-term population viability of area-sensitive species. Large tracts may not always be available. Smaller patches, though not able to contain a viable population individually, may contribute to overall regional population viability if within the small patches pairs could successfully reproduce. By definition, area-sensitive species should have a minimum patch size threshold of habitat below which they will not likely reproduce. Two potential causes for positive relationships between patch size and production are inverse relationships between patch size and brood parasitism and patch size and food availability. My objectives were (1) to determine the minimum patch size thresholds of reproductive success for golden-cheeked warblers (Dendroica chrysoparia), black-and-white warblers (Mniotilta varia), and white-eyed vireos (Vireo griseus); (2) to determine whether thresholds for occupancy, territory establishment by males, or pairing success were indicative of thresholds of reproduction; (3) to determine whether the proportion of pairs fledging brown-headed cowbird (Molothrus ater) young was related to patch size, and (4) to determine the affects of patch size on food availability (i.e., arthropod abundance). The Vickery index of reproductive activity was used to determine reproductive activity of each male or pair and to quantify parasitism occurrences. I collected arthropods using branch clipping to assess the relationship between patch size and arthropod abundance. I found minimum patch size thresholds of reproductive success for golden-cheeked and black-and-white warblers, but not for white-eyed vireos. Minimum patch size of reproductive success was between 15 and 20.1 ha. Minimum patch size thresholds for occupancy, territory establishment by males, and pair formation were not consistent with thresholds for reproductive success. I found no relationships between patch size and cowbird parasitism or patch size and arthropod biomass. Conservation practices for target species based on thresholds of occupancy, territory establishment, or pair formation may not address issues of reproduction. The ability to identify thresholds of reproductive success for target species could be useful in conservation and management in multiple ways including setting goals for retention and restoration of a target species’ habitat patch size.

Through the Smart Metering Initiative in the Canadian province of Ontario, all residential electricity customers will be converted from a tiered rate regime to a time-of-use (TOU) rate regime by the year 2010. Although TOU rates are designed to be cost-neutral for the average consumer, research suggests that TOU rates may affect consumers differently depending on their socioeconomic characteristics. In an effort to better understand the effects of TOU rates on lower-income and senior-headed households, a case-study in Milton was conducted between June and December of 2007. The overarching thesis question is: What are the behavioural responses to, and financial impacts of, TOU electricity rates on lower-income and senior-headed households? Nine expert interviews were conducted with Ontario professionals working in government, environmental non-profit groups, citizen advocacy organizations and affordable housing associations in order to provide context for the study. Time-differentiated electricity consumption data were then collected from 199 households from two senior housing complexes and two affordable housing complexes in Milton, Ontario between June and December 2007. A questionnaire was also sent to each household to determine some socio-economic and structural characteristics of the households. The electricity consumption data collected from the four sites suggest that the households would not benefit financially from TOU rates given electricity consumption behaviour during the period prior to the implementation of TOU rates in June 2007. Thus, they would have to change their behaviour in order to benefit financially from TOU rates. During this pre-TOU period, Site A, Site B and Site C would have paid more, on average, for their electricity under TOU rates than on tiered rates ($0.34, $0.61 and $0.15 per week, respectively). While Site D, on average, would have seen no change under TOU rates. A conservation effect was detected by comparing the electricity consumption from billing periods in 2006 to corresponding billing periods in 2007 after the implementation of TOU rates. Site A saw a conservation effect during the first corresponding billing period (35%); while Site B saw a conservation effect for three corresponding billing periods (21%, 24% and 9%). Site C saw a conservation effect for the first five corresponding billing periods (ranging from 8% to 21%), while Site D saw a conservation effect for all corresponding billing periods (ranging from 10% to 34%). The presence of a conservation effect at Site D was unexpected, particularly because households at Site D are not responsible for paying their own electricity bills. Although a conservation effect was observed after the implementation of TOU rates, the extent to which it could be attributed to the implementation of TOU rates is unclear, and should be investigated further. There was no considerable shift in the proportion of electricity consumed during each of the peak periods during the summer TOU period for Site A and Site D after the introduction of TOU rates. There was, however, a slight reduction in the portion of electricity consumed during the summer TOU period for Site B and Site C (0.2% and 0.1% per week, respectively). Due to the change in the on-, mid- and off-peak schedule from the summer TOU period to the winter TOU period, the households consume more electricity during the off-peak periods in the winter than they do during the off-peak periods in the summer (even though their patterns of consumption do not change). Similar to the pre-TOU period, during the summer post-TOU period, Site A and Site B, and Site C, on average, paid more for electricity (commodity) under TOU rates than they would have paid if they had continued on tiered rates ($0.38, $0.51 and $0.16 more per week, respectively), while Site D would have seen no change in their electricity costs. In contrast, during the winter post-TOU period several sites paid less for electricity on TOU rates than they would have if they had continued on tiered rates. Site B, Site C and Site D paid, on average, $0.78, $0.16 and $1.76 less per week, respectively. Although Site A paid more under on TOU rates during the winter post-TOU (on average $0.18 more per week), the cost was less than during the summer post-TOU period. The change in costs expressed here does not reflect any reduced costs that may have resulted from conservation. For example, if the households were shown to have a conservation effect, they might have lower electricity costs. Additionally, the changes in costs do not reflect any additional fees or charges that might be attributed to the smart meter installation and the Smart Metering Initiative (e.g., additional fees from Milton Hydro). In conclusion, TOU rates appear to be ineffective at motivating these lower-income and senior-headed households in Milton, Ontario to shift electricity from on-peak periods to off-peak periods, however, a reduction in electricity usage may be attributed to TOU rates. Further research is required to confirm these effects. It is important to note that some of the lower-income and senior-headed households in this study appeared to see an increase in their electricity bill, particularly during the summer TOU period. Lower-income and senior-headed households are thought to be less able to shift electricity consumption, therefore it is important to develop mechanisms to identify households that are at risk of bill increases.

Through the Smart Metering Initiative in the Canadian province of Ontario, all residential electricity customers will be converted from a tiered rate regime to a time-of-use (TOU) rate regime by the year 2010. Although TOU rates are designed to be cost-neutral for the average consumer, research suggests that TOU rates may affect consumers differently depending on their socioeconomic characteristics. In an effort to better understand the effects of TOU rates on lower-income and senior-headed households, a case-study in Milton was conducted between June and December of 2007. The overarching thesis question is: What are the behavioural responses to, and financial impacts of, TOU electricity rates on lower-income and senior-headed households? Nine expert interviews were conducted with Ontario professionals working in government, environmental non-profit groups, citizen advocacy organizations and affordable housing associations in order to provide context for the study. Time-differentiated electricity consumption data were then collected from 199 households from two senior housing complexes and two affordable housing complexes in Milton, Ontario between June and December 2007. A questionnaire was also sent to each household to determine some socio-economic and structural characteristics of the households. The electricity consumption data collected from the four sites suggest that the households would not benefit financially from TOU rates given electricity consumption behaviour during the period prior to the implementation of TOU rates in June 2007. Thus, they would have to change their behaviour in order to benefit financially from TOU rates. During this pre-TOU period, Site A, Site B and Site C would have paid more, on average, for their electricity under TOU rates than on tiered rates ($0.34, $0.61 and $0.15 per week, respectively). While Site D, on average, would have seen no change under TOU rates. A conservation effect was detected by comparing the electricity consumption from billing periods in 2006 to corresponding billing periods in 2007 after the implementation of TOU rates. Site A saw a conservation effect during the first corresponding billing period (35%); while Site B saw a conservation effect for three corresponding billing periods (21%, 24% and 9%). Site C saw a conservation effect for the first five corresponding billing periods (ranging from 8% to 21%), while Site D saw a conservation effect for all corresponding billing periods (ranging from 10% to 34%). The presence of a conservation effect at Site D was unexpected, particularly because households at Site D are not responsible for paying their own electricity bills. Although a conservation effect was observed after the implementation of TOU rates, the extent to which it could be attributed to the implementation of TOU rates is unclear, and should be investigated further. There was no considerable shift in the proportion of electricity consumed during each of the peak periods during the summer TOU period for Site A and Site D after the introduction of TOU rates. There was, however, a slight reduction in the portion of electricity consumed during the summer TOU period for Site B and Site C (0.2% and 0.1% per week, respectively). Due to the change in the on-, mid- and off-peak schedule from the summer TOU period to the winter TOU period, the households consume more electricity during the off-peak periods in the winter than they do during the off-peak periods in the summer (even though their patterns of consumption do not change). Similar to the pre-TOU period, during the summer post-TOU period, Site A and Site B, and Site C, on average, paid more for electricity (commodity) under TOU rates than they would have paid if they had continued on tiered rates ($0.38, $0.51 and $0.16 more per week, respectively), while Site D would have seen no change in their electricity costs. In contrast, during the winter post-TOU period several sites paid less for electricity on TOU rates than they would have if they had continued on tiered rates. Site B, Site C and Site D paid, on average, $0.78, $0.16 and $1.76 less per week, respectively. Although Site A paid more under on TOU rates during the winter post-TOU (on average $0.18 more per week), the cost was less than during the summer post-TOU period. The change in costs expressed here does not reflect any reduced costs that may have resulted from conservation. For example, if the households were shown to have a conservation effect, they might have lower electricity costs. Additionally, the changes in costs do not reflect any additional fees or charges that might be attributed to the smart meter installation and the Smart Metering Initiative (e.g., additional fees from Milton Hydro). In conclusion, TOU rates appear to be ineffective at motivating these lower-income and senior-headed households in Milton, Ontario to shift electricity from on-peak periods to off-peak periods, however, a reduction in electricity usage may be attributed to TOU rates. Further research is required to confirm these effects. It is important to note that some of the lower-income and senior-headed households in this study appeared to see an increase in their electricity bill, particularly during the summer TOU period. Lower-income and senior-headed households are thought to be less able to shift electricity consumption, therefore it is important to develop mechanisms to identify households that are at risk of bill increases.

Preservation of large tracts of habitat is often recommended for long-term population viability of area-sensitive species. Large tracts may not always be available. Smaller patches, though not able to contain a viable population individually, may contribute to overall regional population viability if within the small patches pairs could successfully reproduce. By definition, area-sensitive species should have a minimum patch size threshold of habitat below which they will not likely reproduce. Two potential causes for positive relationships between patch size and production are inverse relationships between patch size and brood parasitism and patch size and food availability. My objectives were (1) to determine the minimum patch size thresholds of reproductive success for golden-cheeked warblers (Dendroica chrysoparia), black-and-white warblers (Mniotilta varia), and white-eyed vireos (Vireo griseus); (2) to determine whether thresholds for occupancy, territory establishment by males, or pairing success were indicative of thresholds of reproduction; (3) to determine whether the proportion of pairs fledging brown-headed cowbird (Molothrus ater) young was related to patch size, and (4) to determine the affects of patch size on food availability (i.e., arthropod abundance). The Vickery index of reproductive activity was used to determine reproductive activity of each male or pair and to quantify parasitism occurrences. I collected arthropods using branch clipping to assess the relationship between patch size and arthropod abundance. I found minimum patch size thresholds of reproductive success for golden-cheeked and black-and-white warblers, but not for white-eyed vireos. Minimum patch size of reproductive success was between 15 and 20.1 ha. Minimum patch size thresholds for occupancy, territory establishment by males, and pair formation were not consistent with thresholds for reproductive success. I found no relationships between patch size and cowbird parasitism or patch size and arthropod biomass. Conservation practices for target species based on thresholds of occupancy, territory establishment, or pair formation may not address issues of reproduction. The ability to identify thresholds of reproductive success for target species could be useful in conservation and management in multiple ways including setting goals for retention and restoration of a target species’ habitat patch size.

This thesis focuses on the perceptions and experiences of Rwandan children living in rural child headed households regarding malaria, and how these perceptions and experiences compare to their other health concerns. Despite the attention given to malaria by the international community and the Rwandan government, and the numerous studies that have documented the material and socioeconomic poverty that characterizes the lives of child headed households, Rwandan children’s perspectives regarding their health have rarely been elicited. Through the use of drawing activities and semi-structured interviews with 37 children between the ages of six to eighteen years, living in 14 child headed households, I explore how poverty shapes their understandings, experiences and responses to malaria, and the variation in these perceptions and experiences based on age and gender. Malaria, although a concern for the children, is simply one of many challenges they face in a context characterised by poverty, and structured risk to poor health outcomes. These barriers, along with the other health concerns expressed by the children, receive little attention from informal and organised networks of support, which results in the children bearing a disproportionate burden of social suffering. Insight into structural violence is gained through interviews with NGOs who have or are currently working with child headed households. These interviews illustrate how larger socio-political and economic forces shape the lived reality of the children. Additionally, interviews with community members who offer support to the children illustrate how social ideologies affect local level perceptions and responses to child headed households.

Doctor of Philosophy / Department of Biology / Brett K. Sandercock / The reproductive strategies of avian brood parasites and the behavioral responses of their hosts have served as a model of co-evolution in nature. Host adaptations to reduce the costs of parasitism are countered with novel parasite behaviors that increase the success of the parasite and thereby decrease host productivity. Not all host species possess anti-parasite defense behaviors, and parasitism by Brown-headed Cowbirds (Molothrus ater) may cause population declines in some species. Bell’s Vireo (Vireo bellii) is a small-bodied cowbird host that fails to fledge young if successfully parasitized. Although vireos desert naturally parasitized nests, the cues that cause desertion have not been identified. Understanding how parasitism affects vireo productivity is important because cowbird removal is an integral component of the recovery efforts for the endangered Least Bell’s Vireo (V. b. pusillus) in California. However, it is generally unknown how cowbird removal affects vireo productivity. To address these issues, I monitored the productivity of vireos nesting in Kansas at the Konza Prairie Biological Station, conducted a clutch manipulation experiment, and experimentally removed cowbirds. In addition, I used stable isotope analysis to determine if recently fledged cowbird young could be assigned to habitats or host species. I found that vireos did not desert nests due to the presence of a cowbird egg; rather egg removal by cowbirds caused desertion, which is a generalized response in many taxa of birds. Cowbird removals decreased parasitism of vireo nests by approximately 36% and led to a 2-fold increase in vireo productivity per pair. Cowbird productivity from vireo pairs increased because fewer parasitized nests were deserted and parasitized nests on removal plots had a higher probability of success. No cowbird removal study has reported an increase in cowbird productivity in response to trapping. Cowbird nestlings from prairie plots and shrub plots differed in carbon and nitrogen isotope compositions, and 87% of locally produced juvenile cowbirds were classified with nestlings from shrub plots. Thus, the continued expansion of woody plants into tallgrass prairie may result in local increases in cowbird productivity.

By 2010, it is projected that there will be 25 million orphans worldwide. It is anticipated that 2.3 million children will be orphaned due to AIDS in South Africa by 2020. Traditionally, the extended family has absorbed most people affected by the disease but there is a growing concern that families are finding it increasingly difficult to cope, perhaps reaching saturation point. In the absence of alternatives, some children end up living alone in child-headed households (CHHs), the numbers of which are rising at an alarming rate. Despite the increase in this living arrangement research is scarce on the psychosocial consequences of AIDS related orphanhood. This is more evident concerning very young orphans living in CHHs. This qualitative study explores psychosocial issues pertaining to young orphans living in CHHs from an ecosystemic perspective. Four participants, who worked in various capacities for two non-governmental organisations, were interviewed in-depth about their experiences of working with young orphans. The conversations were subjected to an interpretive analysis where, in collaboration with the participants, central themes and sub-themes were identified. Eleven main themes emerged from the analysis: why children live in child-headed households; issues surrounding the death of a parent; experiences of a young child living in a child-headed household; the experience of living in a child-headed household; stigma; relationships with relatives; relationships with peers; relationships with crèches and teachers; relationships with the community; relationships with non-governmental organisations; and relationship to government and essential services. Based on an integration of the findings, a model was presented depicting the ecosytemic factors affecting the very young child living in a CHH. Copyright / Dissertation (MA)--University of Pretoria, 2010. / Psychology / unrestricted

This study aims at investigating the managerial imperatives of teen motherhood in public secondary schools in the Mamaila circuit, Limpopo province. The focus is on the managerial imperatives of teen mothers that principal must fulfil; the experiences of principals that have teen mothers in their school; the ability of the principals to fulfil these managerial imperatives; and the kinds of support principals give teen mothers. The study was informed by the legal framework entrenched in Chapter 2 (Bill of Rights) of the Constitution of South Africa, especially such concepts as equality, human dignity, security, the interest of the child, the right to basic education and the safety of learners. In South Africa it is illegal to expel pregnant girls in terms of the Constitution of the Republic of South Africa (hereafter Constitution) (RSA, 1996a). Schoolgirls who become pregnant are allowed to return to school after giving birth (Kaufman, De Wet and Stadler, 2001:147). The learner pregnancy policy (DoBE, 2007) puts obligations to principals to deal with each case confidentially (i.e. to respect the human dignity of the learner); to support the learner by encouraging her to continue with education prior to and after the delivery of the baby; to put in place appropriate mechanisms to deal with unfair discrimination, hate speech or harassment that may arise. The findings have revealed that most of the principals are not aware of the departmental policy on learner pregnancy, but they acknowledge that it is unconstitutional to expel a pregnant learner. Principals find it difficult to liaise with learners who are on maternity leave in terms of giving them school tasks as advocated by the learner pregnant policy (DoBE, 2007). Learners who are entitled to receive a child-support grant disrupt school on the social grant payday by queuing for permission to go to local pay points. Principals also experience late-coming and absenteeism from teen mothers due to a lack of reliable people to care for their babies during the school day. The performance of teen mothers deteriorates due to the household chores of taking care of the baby and having no time to attend extralessons or afternoon study sessions at school. The study has also revealed that principals engage the local clinics officials to present pregnancy awareness with the learners as a way of educating them. / Dissertation (MEd)--University of Pretoria, 2013. / gm2014 / Education Management and Policy Studies / unrestricted

MPH / Department of Public Health / Background: Human Immunodeficiency virus (HIV) and Acquired Immunodeficiency Syndrome (AIDS) is one of the major public health problems that has negatively impacted mostly orphans leaving in child-headed families in the world. A child- headed family is defined as a family, living under the same roof, which is headed by a person under the age of 18 years. Many of these children have become heads of households and they are obliged to look after themselves and siblings. As a result, some children drop out from school while looking for jobs to sustain the family. Purpose: The purpose of the study is to explore and describe the experiences of children in HIV/AIDS-affected child-headed families in Zimbabwe. Methodology: The researcher employed qualitative approach with explorative, descriptive, contextual and phenomenological designs. Nonprobability purposive sampling was used to select the participant. Children aged between 12-18 years were selected as they were able to narrate their life experiences. In-depth face to face individual interviews were used to collect data pertaining to experiences of children in HIV/AIDS child-headed families. Data was transcribed verbatim, and then translated from Shona to English. The data was then analysed following Tesch’s eight steps model. Findings: The findings of the study revealed that children in HIV/AIDS-affected child-headed families were lacking basic commodities such as food, clothing, shelter and clean water. The findings also revealed that children living in HIV/AIDS-affected child-headed families were being abused physically, sexually, emotionally and verbally. The findings of the study also revealed that children living in HIV/AIDS-affected child-headed families received support from the government, non-governmental organisations, community and relatives. / NRF