Sustainability of Solar PV Systems in Malawi

Solar photovoltaic (PV) systems can offer a low carbon, low cost and economically competitive method of providing electricity in such remote areas unlikely to be grid connected in the near future. As such, they are being installed in significant numbers across sub-Saharan Africa. Malawi’s off grid PV installed capacity has increased from 0.2 MW in 2007 to 5.7 MW in 2017. In 2012 there was an estimated 7,000 PV systems present in the country. Despite the increase of installed capacity, many solar PV systems fall into disrepair, usually only achieving 10% of their lifetime expectancy, due to lack of maintenance, poor initial design, end-user misuse, or insufficient ownership and business model strategies. Research into factors that affect sustainability of off grid PV systems is needed to support identification of appropriate interventions and ensure project longevity with reduced lifetime costs of systems serving rural communities in sub-Saharan Africa. The study employs a novel scoring method which is used to support a sustainability evaluation of 65 off-grid community solar PV projects in Malawi. Projects are scored against the technical, economic, social, and organisational factors. An aggregated (total) sustainability factor is proposed here as a good early measure of project sustainability; however, there is insufficient evidence currently available to validate the accuracy this method as a predictor of long-term sustainability i.e. continued data collection and analysis of these sustainability factors, over several years, is required to obtain a sufficient evidence base to enable a deep understanding of the relative influence of the different sustainability factors for community energy projects in a variety of contexts

Combining Self-Affirmation and Implementation Intentions: Evidence of Detrimental Effects on Behavioral Outcomes

Background There is limited evidence that self-affirmation manipulations can promote health behavior change. Purpose The purpose of this study was to explore whether the efficacy of a self-affirmation manipulation at promoting exercise could be enhanced by an implementation intention intervention. Methods Participants (Study 1N =120, Study 2N =116) were allocated to one of four conditions resulting from the two (self-affirmation manipulation: no affirmation, affirmation) by two (implementation intention manipulation: no implementation intention, implementation intention) experimental design. Exercise behavior was assessed 1 week post intervention. Results Contrary to prediction, those participants receiving both manipulations were significantly less likely to increase the amount they exercised compared to those receiving only the self-affirmation manipulation. Conclusion Incorporating an implementation intention manipulation alongside a self-affirmation manipulation had a detrimental effect on exercise behavior; participants receiving both manipulations exercised significantly less in the week following the intervention

Sustainability evaluation of community-based, solar photovoltaic projects in Malawi

Background: A novel project sustainability framework is used to evaluate 65 off-grid solar photovoltaic (PV) energy system projects in Malawi. This study addresses PV projects serving rural public facilities, a solution known to have had historical issues with poor sustainability. A recent countrywide program targeting such facilities was evaluated against existing projects to determine whether this latest iteration offered better results. Method: Sustainability is defined at the project-level with metrics justified under the main themes of technical, economic, social, and organizational. Data captured for each project is based on a custom survey and interview of key stakeholders. Projects are grouped according to age, project implementer, income level, and PV system size to compare relative results. Results: The sustainability outlook for each project is evaluated. We find sustainability for most projects to be low. Social sustainability was weak with many projects due to low local community stakeholder engagement in terms of numbers of stakeholders, meeting frequency, and community contributions. Organizational challenges included a lack of key management positions in place and extremely limited training provisions. Furthermore, the evaluation highlights the economic health of the system to be key to sustainability, with the "healthiest" projects affording only 37% of expected operations and maintenance costs. Relative to expected demand, systems were found to be undersized for both panels (53% of required) and batteries (57%). Users reported achieving only 60% of their desired consumption. Poor sizing standards related to the lack of load profiles for first-time electricity users as well as poor quality components reduced the overall technical sustainability. Conclusion: Rural public facilities with solar PV in Malawi are not well served by isolated community management. Improved sustainability requires the establishment of a robust financial framework prior to project development that includes formal local government support. This paper discusses ideal management frameworks and their ultimate implications for project developers, policy makers, and the research community

Individual and family experiences of loss after acquired brain injury: A multi-method investigation

After a person experiences an acquired brain injury (ABI), there can be grieving for what has been lost. Little is known about the loss felt by relatives of people with ABI. This study investigates concepts of loss among individuals with ABI and their families. Forty participants, recruited from a brain injury charity client pool, took part in a semi-structured interview. Of the participants, 17 were in dyadic relationships (53% spouses, 41% parent/child and 6% sibling relationships). They also completed the Brain Injury Grief Inventory (BIGI; Coetzer, B. R., Vaughan, F. L., & Ruddle, J. A. (2003). The Brain Injury Grief Inventory. Unpublished Manuscript. North Wales Brain Injury Service, Conwy & Denbighshire NHS Trust) as a quantitative measure of loss after ABI. Five main themes emerged from the interviews: loss of person; loss of relationships; loss of activity/ability; loss of future; unclear loss. There were distinct differences qualitatively between individuals and relatives and only two dyads experienced similar loss, but there were no significant differences in loss as measured quantitatively by the BIGI. The differences between relatives’ loss and individuals with ABIs’ loss are discussed. This research suggests that it is important when supporting families to consider individual experiences, because even though the loss originates from the same injury, the loss as experienced may substantially differ among those affected by it

An evaluation of Bradfordizing effects

The purpose of this paper is to apply and evaluate the bibliometric method Bradfordizing for information retrieval (IR) experiments. Bradfordizing is used for generating core document sets for subject-specific questions and to reorder result sets from distributed searches. The method will be applied and tested in a controlled scenario of scientific literature databases from social and political sciences, economics, psychology and medical science (SOLIS, SoLit, USB Köln Opac, CSA Sociological Abstracts, World Affairs Online, Psyndex and Medline) and 164 standardized topics. An evaluation of the method and its effects is carried out in two laboratory-based information retrieval experiments (CLEF and KoMoHe) using a controlled document corpus and human relevance assessments. The results show that Bradfordizing is a very robust method for re-ranking the main document types (journal articles and monographs) in today’s digital libraries (DL). The IR tests show that relevance distributions after re-ranking improve at a significant level if articles in the core are compared with articles in the succeeding zones. The items in the core are significantly more often assessed as relevant, than items in zone 2 (z2) or zone 3 (z3). The improvements between the zones are statistically significant based on the Wilcoxon signed-rank test and the paired T-Test

The &Spaces Library

Capstone project for LIS 2005 involving the redesign of public library institutions with a focus on physical space. Conference poster, PowerPoint, and paper attached

Whale, whale, everywhere: increasing abundance of western South Atlantic humpback whales (Megaptera novaeangliae) in their wintering grounds

The western South Atlantic (WSA) humpback whale population inhabits the coast of Brazil during the breeding and calving season in winter and spring. This population was depleted to near extinction by whaling in the mid-twentieth century. Despite recent signs of recovery, increasing coastal and offshore development pose potential threats to these animals. Therefore, continuous monitoring is needed to assess population status and support conservation strategies. The aim of this work was to present ship-based line-transect estimates of abundance for humpback whales in their WSA breeding ground and to investigate potential changes in population size. Two cruises surveyed the coast of Brazil during August-September in 2008 and 2012. The area surveyed in 2008 corresponded to the currently recognized population breeding area; effort in 2012 was limited due to unfavorable weather conditions. WSA humpback whale population size in 2008 was estimated at 16,410 (CV = 0.228, 95% CI = 10,563–25,495) animals. In order to compare abundance between 2008 and 2012, estimates for the area between Salvador and Cabo Frio, which were consistently covered in the two years, were computed at 15,332 (CV = 0.243, 95% CI = 9,595–24,500) and 19,429 (CV = 0.101, 95% CI = 15,958–23,654) whales, respectively. The difference in the two estimates represents an increase of 26.7% in whale numbers in a 4-year period. The estimated abundance for 2008 is considered the most robust for the WSA humpback whale population because the ship survey conducted in that year minimized bias from various sources. Results presented here indicate that in 2008, the WSA humpback whale population was at least around 60% of its estimated pre-modern whaling abundance and that it may recover to its pre-exploitation size sooner than previously estimated.Publisher PDFPeer reviewe