Life cycle cost analysis of silicon and organic building integrated photovoltaic systems (BiPV)

Despite the undisputed benefits associated with photovoltaic (PV) technology, the financial barrier acts as the major hurdle before it is seen as a commercial competitive form of renewable energy. Many studies have been performed outlining the life cycle energy benefits of PV technology. However, there has been limited number of studies dedicated to the life cycle cost impacts. The aim of this paper is to identify whether life cycle cost analysis is the best approach to determining the cost contributors or savings associated with this technology. This paper has been structured similarly to previous life cycle energy studies to consider the cost implications involved within each area of the products lifecycle. Amongst many new developments, traditional silicon based units have been challenged by the introduction of new organic systems; and recent studies highlight that these systems offer major cost reductions. Based on an analysis of current literature, this paper identifies that the recent growth and development of both organic and silicon based systems have had a considerable effect on the cost of PV cells. The competitive nature of the renewable energy market will also impact on a life cycle cost analysis; and any potential findings will valid for a limited timeframe.

Optimising the life cycle energy performance of residential buildings

A holistic approach to low-energy building design is essential to ensure that any efficiency improvement strategies provide a net energy benefit over the life of the building. Previous work by the authors has established a model for informing low-energy building design based on a comparison of the life cycle energy demand associated with a broad range of building assemblies. This model ranks assemblies based on their combined initial and recurrent embodied energy and operational energy demand. The current study applies this model to an actual residential building in order to demonstrate the application of the model for optimising a building’s life cycle energy performance. The aim of this study was to demonstrate how the availability of comparable energy performance information at the building design stage can be used to better optimise a building’s energy performance. The life cycle energy demand of the case study building, located in the temperate climate of Melbourne, Australia, was quantified using a comprehensive embodied energy assessment technique and TRNSYS thermal energy simulation software. The building was then modelled with variations to its external assemblies in an attempt to optimise its life cycle energy performance. The alternative assemblies chosen were those shown through the author’s previous modelling to result in the lowest life cycle energy demand for each building element. The best performing assemblies for each of the main external building elements were then combined into a best-case scenario to quantify the potential life cycle energy savings possible compared to the original building. The study showed that significant life cycle energy savings are possible through the modelling of individual building elements for the case study building. While these findings relate to a very specific case, this study demonstrates the application of a model for optimising building life cycle energy performance that may be applied more broadly during early-stage building design to optimise life cycle energy performance.

Changing teaching practice using a school improvement cycle

This paper discusses the actions, strategies and responses of teachers during their involvement with a short cycle school improvement model in four schools. The school improvement cycles are designed to build the leadership of principals to support teachers at an individual level through a web of decision making and practices. In these cycles, teachers are both more supported and more accountable for implementing changed classroom practices in order to bring about improved student outcomes. T he school improvement model follows a pattern of decision making and negotiation across and between layers of leadership within the network and the school, but for improvement to occur at the level of the student, the teacher’s pedagogical practices need to be r(e)negotiated to ensure that teaching practice meet the needs of the students.
However, evaluating teacher practice is risky business. Teachers can say, and believe, that their practices are providing the best for their students, but this is an area of uncertainty. Using a number of strategies including observation of teacher meetings, teacher interviews and video capture, the research will investigate the issue of how directives for change are translated into classroom practice. The observation of meetings of teachers will provide an indication of the type of change required and the proposed strategies. Video-capture, which is followed by teacher interviews, will provide further information about changing teaching practice.
With teacher permission, students in the research will also view the video snippets to indicate what particular pedagogy was instrumental in their learning, providing substantial feedback to the teacher on what works best for that cohort of students at that time. Teachers will be provided with the opportunity to reflect on and learn from their practice, using video-capture as a self-reflective tool. Teachers can employ video capture as a strategy to assess their management of students, their pedagogical approaches, teaching strategies and student responses and is an emerging area of research of interest to teachers and teacher educators (e.g. Seidel, Sturmer, Blomberg, Kobarg, Schwindt, 2011). The paper will provide examples of changed teacher practice through vignettes of a number of schools, teachers and classrooms and will explore the methodological reflexivity associated with this dual role of the research: to evaluate, and to support improvement.

Role of microstructure in the low cycle fatigue of multi-phase steels

The low cycle fatigue (LCF) behaviour of several commercially-produced multiphase steels was studied; including dual-phase (DP) and transformation induced plasticity (TRIP). In addition, a novel TRIP980 hybrid microstructure was examined that consisted of coarse ferrite grains along with low temperature bainite regions interspersed with retained austenite. Fully reversed strain controlled fatigue tests were conducted on the different steels to determine the cyclic stress response and strain to failure. The effects of the cyclic deformation on the microstructures were analysed using electron backscattered diffraction (EBSD) and X-ray diffraction (XRD). Results showed that the initial cyclic hardening behaviour and low cyclic softening ratio observed in the TRIP steels was not necessarily due to austenite to martensite transformation. Differences between the austenite transformation behaviour of the conventional and novel hybrid TRIP microstructures was related to the different surrounding phases and the size of the retained austenite.

Biennial reproductive cycle in an extensive matrotrophic viviparous batoid : the sandyback stingaree Urolophus bucculentus from south-eastern Australia

Urolophus bucculentus, the largest urolophid species found in southern Australia, exhibits a biennial reproductive cycle. Ovulation occurs during October to January followed by a 15–19 month period of gestation followed by parturition during April to May and a short rest period while the ovarian follicles continue to develop for subsequent ovulation. Male breeding condition peaks during April to June to coincide with the period of parturition. Urolophus bucculentus has the highest matrotrophic contribution reported for any urolophid species, with a mean wet mass gain from egg in utero (4 g) to full-term embryo in utero (250 g) of c. 6250% (maximum c. 7200%), and perhaps explains the biennial female reproductive cycle where 50% of females contribute to each year's recruitment. Litter size (one to five) increases with total length (L_T). Females reach a longer maximum L_T (L_Tmax) than do males (885 v. 660 mm). The L_T at maturity for males and females at 50% mature (L_T50) is c. 414 mm (63% of L_Tmax) for males and c. 502 mm (57% of L_Tmax) for females, length at maternity indicates that recruitment production occurs later in life at c. 632 mm L_T (71% of L_Tmax).

The e-learning cycle and continuous improvement for e-entrepreneurs

The purpose of this paper is to explore the integration of learning, continuous improvement and innovation theories as a basis for enhancing the education of e-entrepreneurs. Conceptual development of emerging interdisciplinary literature is combined with example analysis to develop the Circle of E-learning uniquely augmented by hermeneutics, action research and the creative destruction cycle of innovation using applied examples of e-entrepreneurship. Four R’s are discussed in the Circle of E-learning; Review, Revise, Reconstruct, and Reveal. Observations for each of the 4R’s are made regarding continuous improvement of the education of e-entrepreneurs. Findings are that the procedural pivot points indicated by the 4R’s can be helpful for administrators and educators to improve operations and outcomes in management and professional development situations.

Sustainability evaluation, life cycle assessment and facilities management for Geelong Retail Development

Value management is a technique used during the design stage to justify cost and worth of a proposal. Designer must never center only to save capital expenditure but consider holistically the whole building life which will be sustainable. Therefore, sustainability evaluation must adopt a long term view and will properly include three crucial elements: economic, social and environmental. Lack of awareness of value management during the design stage of a building project will adversely impact on the life cycle assessment (LCA) and facilities management (FM). This paper provides a review of the sustainable elements that must be considered when designing and costing a new retail development in the Geelong region of Australia and how these factors influence the whole building life. The result of this research helps to create a greater understanding of the different attributes that will affect the LCA and FM decisions made on sustainable development in this and other regional Australian cities that are undergoing major population growth.

Are policy makers,researchers and educators 'addicted' to the equity failure cycle?’

Introduction : In this paper,  I suggest part of the key to equity progress is to remove our gaze from the equity defined ‘others’ to focus on recognising and transforming the ‘privilege- benefit loop’ (author’s term) that underpins the creation and maintenance of hegemonic Western educational institutions. As a modest contribution to the efforts to address the ‘equity failure cycle’ (author’s term, later expanded on), I suggest three combined approaches (drawing from critical theory and critical pedagogy ) that incorporate and illustrate the interconnected, usually concurrent and complementary political, cultural/institutional and personal levels of understanding, experience and action that I think are necessary ingredients for change. Each of the three levels or domains are inter-related and ‘co-constructive’ and therefore, potentially ‘de-constructive’ .