Gum Damar as a substitute for Canada Balsam in mounting media for microscopical specimens

A number of substitutes for Canada balsam have been suggested in the literature with varying degrees of success for the entomologist. This paper re-evaluates classic Gum Damar media as a substitute for Canada balsa

Lessons Learned from Educational Research of a National Science Foundation Research Experiences for Undergraduates

Participation in an archaeological field school is the entry point to a professional career in the discipline. Despite the importance of field schools, few scholars have investigated achieved student-learning outcomes or lasting impacts on students from participation in archaeological field research. We report on the educational design, learning objectives, and results of three years of formative and summative assessments for an interdisciplinary, archaeology and ecology research program for undergraduate students. Our learning objectives include promoting scientific literacy and communication, critical thinking and STEM skills, and capacities in archaeological and ecological interdisciplinarity. Using developed rubrics that account for both critical thinking and STEM understanding, self-administered competency surveys, and program-developed items, we found significant gains in nearly all learning objectives. Students demonstrated growth in program specific content, perceived abilities in their scientific and discipline specific skills, critical thinking skills, and scientific communication skills. These educational outcomes and assessment tools have implications for how we design and evaluate field learning in archaeology and may be applied to field school instruction

Interactional sociolinguistics : insights and applications.

Thesis (Ph.D.)-University of Natal, Durban, 1987.The research reported in this thesis is basically applied in purpose. However the theoretical siqnificance of interactional sociolinquistics is explored by showinq that it is based on a philosophy of science which differs fundamentally from the versions of positivism which have informed linquistics over the years. The research methods consistent with this methodology are also outlined. The applied siqnificance of the sub-field is demonstrated more qenerally at first by examininq its contribution to the understandinq of the relationship between lanquaqe and context. Thereafter the contribution to the understandinq of this relationship is explored in more specific terms by examininq the role of contextual information in the form of culturally-specific interactional styles in the accomplishinq of prejudice and neqative cultural stereotypes in intercultural communication in South Africa. The siqnificance of this explanation is explored further by showinq how such an interactional account fits into a more comprehensive explanation of the causes of discrimination in South Africa, one that includes, also. structural explanations, and explanations in terms of the psycholoqy of individuals. This prepares the way for a consideration of the possible contribution of interactional sociolinquistics to solutions to the problem of discrimination both in South Africa and elsewhere

Optimisation of Offshore Wind Farms Using a Genetic Algorithm

A modular framework for the optimisation of an offshore wind farm using a discrete genetic algorithm is presented. This approach uses a bespoke grid generation algorithm to define the discrete positions that turbines may occupy thereby implicitly satisfying navigational and search and rescue constraints through the wind farm. The presented methodology takes a holistic approach optimising both the turbine placement and inter-array cable network, while minimising the levelised cost of energy and satisfying real world constraints. This tool therefore integrates models for the assessment of the energy production including wake losses; the optimisation of the inter-array cables; and the estimation of costs of the project over the lifetime. This framework will allow alternate approaches to wake and cost modelling as well as optimisation to be benchmarked in the future