No description available.

The future of food production contains some challenges. The production needs to increase in order to feed a growing population, but at the same time there is an increased need to transi- tion to more sustainable ways of cultivation. This can be a challenge since increased intensity and sustainability is not always compatible. Agroforestry systems have shown potential as sustainable food production system in previous research. The area where this study was con- ducted, Haraa in Babati District, has a long history of agroforestry. The aim of this study was to answer what resources agroforestry farmers used to manage their farms, to determine if the agroforestry systems could be regarded as sustainable. Circular economy was used as a theo- retical framework and resource flow as an analytical tool. This study investigated how the resource flow looked like on six agroforestry farms in a Haraa, a village in Tanzania. The empirical data was gathered with semi-structured interviews from 8 informants. The analysis showed that the farmers were dependent on few external resources and could produce or pre- form most of the needed resources inside their own system. The farms had a circular flow to a large extent, but some of the farms have room for improvement in the management regarding sustainability.

Background HIV infection continues to be a challenge in South Africa with new infections reported at alarming rates. Health Care Workers (HCWs) who are nurses consequently have frequent contact with HIV positive and TB co-infected patients. During this contact their counselling behaviour is influenced by their knowledge, beliefs and attitudes about HIV and AIDS, STIs and TB (HAST) and may influence provision as well as the quality of HAST counselling behaviour. Aim The aim of the study was to assess eThekwini Municipality Health Care Workers’ knowledge, beliefs and attitudes regarding counselling behaviour for HAST and to make recommendations based on the findings of this study. Methods A descriptive cross sectional study design was used in which data about HAST counselling behaviour were collected using self administered questionnaires. The study population was all the nurses working at eThekwini Municipality Health clinics that were on duty at the time of the study and excluded those nurses who were absent or on leave during the period of data collection. Informed consent was signed by each respondent. Data were captured using SPSS version 14 and univariate, bivariate and multivariate analysis was undertaken. The level of significance was P<0, 05. Results The HCWs were well informed regarding counselling behaviour for HAST. HCWs with university education scored higher than those with college level of education but there were no statistically significant differences between the HCWs with the university education and those with college education. However some HCWs’ attitudes and beliefs about poverty were negative and may not be helpful in improving a patient’s health. Results showed that some HCWs’ negative attitudes about HAST counselling resulted from fear of HIV and or TB infection. Age and the level of education showed statistically significant association with beliefs. Older, better educated HCWs with a university education scored higher for knowledge for HAST counselling behaviour. There was no statistical significant difference found between HCWs who see less than 100 patients per day and those who see more than 100 patients per day. Conclusion The findings of the study show that HCWs were well informed regarding counselling behaviour for HAST, even though some HCWs have negative attitudes which are not supportive which need to be addressed. Recommendations It is recommended that HCWs receive continuous training in order to address the negative attitudes about counselling behaviour for HAST. / Thesis (M.Med.Sc.)-University of KwaZulu-Natal, Durban, 2012

The demand for environmental assessments on buildings and energy consumption is increasing as well as the energy performance requirements for buildings. At the same time it is increasingly common with self-producers of heat and electricity generation. The main purpose with this master thesis is to investigate how time resolution affects the environmental assessment of energy consumption in office buildings connected to district heating (DH). Environmental assessments were done with both attributional LCA and consequential LCA with system expansion. Fortum´s DH system in Stockholm was analyzed and district heating production was simulated in a Matlab-model. Greenhouse gas (GHG) emissions for the production were calculated. The heat demand of the office Gångaren 16 in Stockholm was simulated in IDA ICE. Thereafter the environmental impact in terms of GHG emissions was calculated with data from the assessment of the DH production. The results show that the highest time resolution that should be used for environmental assessment of energy consumption in buildings connected to DH is daily average values, regardless of LCA perspective. Moreover, sufficient results are achieved with yearly average values with attributional LCA. The results for consequential LCA with system expansion show that daily and yearly average values are not sufficient. Since peak production is temperature dependent rather than time dependent it is recommended that DH peak production is environmental assessed by temperature in future work.

No description available.

A survey of arthropods associated with exotic multipurpose trees and food crops used in agroforestry and indigenous tree species (Tamarindus indicus) grown in the wild was conducted in 1990 and 1991. The exotic multipurpose tree species (MPTs) used were: Gliricidia septum, Leucaena leucocephala and Cassia siamea growing in an alley cropping system and the food crops were Vigna unguiculata, Zea mays, and Cajanus cajan. The consequences of growing taxonomically related plant species in agroforestry systems were considered. Insecticidal knockdown technique was used to sample arthropods from the foliage. 92 species of arthropods belonging to 48 Families were found to be associated with tree species and the crops. Of these, 27 species were on MPTs, 3 species on crops, 12 species on the chosen wild tree, 13 species were shared amongst MPTs and crops while 14 species were shared between MPTs and the wild tree. A further 19 species were shared between all the groups of plant species (MPTs, crops and the wild tree) with 4 species being shared between the wild and the crop. The effect of tree pruning on arthropod communities on trees was also investigated and the results showed that pruned trees supported a richer arthropod fauna than unpruned trees. Through simulated defoliation, the impact of insect defoliators on four MPTs was also investigated. There was a considerable reduction in overall growth rate, height and diameter increment depending on the level of defoliation. Several stress factors often predispose plants to insect attack. Pruning, as a stressing agent was investigated in relation to infestation of Cassia siamea by the stem borer Xyleutes capensis. Out of the 200 pruned trees surveyed, 90 % showed the signs of borer attack, compared with only 31.5 % of unpruned trees. The role MPTs can play in aggravating infestation of stored pulses by a bruchid beetle, Callosobruchus chinensis was investigated by comparing its survival on seeds of three MPTs and Cajanus cajan. Whereas the bruchid was able to oviposit on both the MPT and crop seeds, no larval emergence was observed in any of the MPTs showing that the MPTs may not support reproduction and development of C. chinensis in the field.

No description available.

Hallsburg ISD is a small, rural, K-6 school district struggling to sustain its operations due to reduced funding from the state, decreased enrollment, and a decrease in the local tax base. This Problem in Practice Record of Study examines the sustainability issues associated with this school district and its importance to the community. Key stakeholders in the community and school district were interviewed to help develop a thick description of this district’s position in the community. Surveys were also sent to randomly selected, registered voters living in the district, to provide more in-depth data in the development of a thick description. District documents were also studied to provide more information in the plight of the district and provide for the triangulation of data. The interviews showed a very strong relationship between the participants and the school district. The key stakeholder participants included community leaders as well as parents of current and past students who represent the district demographics. The majority of this group supported raising their taxes to improve the school district and prevent it from consolidating with a neighboring district. While the surveys strongly supported the notion of how important the school was to the community, the results were not as favorable toward raising taxes. Only half of the survey respondents favored raising their taxes to keep the local school open and keeping local control of the district. The other half favored consolidating with a neighboring school district over raising their taxes. The overall results were very favorable toward the importance of the school district to the community. The challenging economic conditions place a very strong dilemma on many residents, as they would vote to lose their district over raising taxes. One recommendation to the district is to educate the community of the local tax situation. If Hallsburg ISD were to consolidate with any of the neighboring districts, the tax rate would immediately increase. This increase would be higher than the tax rate needed to sustain the district and keep Hallsburg School open.

The purpose of this research was to investigate the feasibility of a passenger rail service operating on a current rail line in Canterbury, known as the Main North Line, which connects the Waimakariri District to Christchurch. The Main North Line runs through the two main urban areas of the Waimakariri District: Rangiora and Kaiapoi. The need for research into the potential use of the Main North Line for passenger services has arisen due to increasing car congestion on arterial roads between the Waimakariri District and Christchurch. All traffic coming from the Waimakariri District into Christchurch must cross the Waimakariri River, creating a transport bottleneck. An assessment of the location of the Main North Line was conducted with respect to the travel needs of Waimakariri District residents using Geographic Information Systems (GIS) to investigate how far residents live and work from the line and resident surveys to determine whether people would use rail as their main mode of travel into Christchurch. Assessment of the infrastructure was with regard to the locations of potential railways stations and the capabilities of the infrastructure for supporting different levels of passenger service. National and regional transport strategies are placing more importance on the transportation of people and freight by way of rail. A potential rail service for Canterbury will therefore likely include national and regional stakeholders in co-operation with a private service operator, as currently occurs in Wellington and Auckland. An average of 71% of Waimakariri District residents stated they would switch to rail as their main mode of transport for the journey into Christchurch. GIS analysis found that the number of journeys which start in the Waimakariri District and terminate within 1km of Christchurch stations is around 610 which increases to around 4,300 if connecting bus services were utilised in Christchurch.

Thesis (Ph. D.)--University of Arizona. / Includes bibliographical references (leaves 301-323).