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Kingsley Burlinson 《中国科技期刊研究》2007,23(1):65-71
The acoustic decrepitation method heats a small monomineralic sample and counts pressure impulses as the inclusions burst when they develop high internal pressures. For aqueous fluids, the decrepitation temperature is correlated with the homogenisation temperature, but gas rich fluids give a distinct and characteristic low temperature decrepitation peak which can be used to recognize gas rich fluid inclusions. This information is useful in exploration for Au deposits, which are frequently associated with CO2 rich and sometimes CH4 rich fluids. This distinctive decrepitation occurs because the CO2 rich inclusion fluids expand according to the gas law and develop internal pressures high enough to burst the host mineral grain at temperatures well below their homogenisation temperatures. In contrast, aqueous fluids condense to a liquid and vapour phase during post-entrapment cooling. Upon subsequent heating their internal pressures do not increase significantly until after homogenisation to a single phase occurs and hence they do not decrepitate ＂prematurely＂ as gas rich inclusions do. This behaviour is usually regarded as an annoyance in conventional microthermometric homogenisation studies, but can readily be used as an exploration aid to find mineralisation deposited from such gas rich fluids. Decrepitation results on samples from Cowra Ck, NSW, Australia, which have also been microthermometrically measured for CO2 content, show that amounts of less than 5 mole % CO2 are easily distinguished by decrepitation and amounts as low as 1 mole % CO2 may be determinable. Examples of the use of acoustic decrepitation in the study of 6 gold mines in the Shandong and Hebei provinces of China are discussed. 相似文献
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This article critically examines World Bank andother donor agency's policy changes towardfinancing of higher education in Sub-SaharanAfrica. It concludes that policy vicissitudeshave adversely affected these institutions. Therecommendation is that the unique context ofeach state play a role in higher educationfinancial policy formation and implementation. 相似文献
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Income and Social Rank Influence UK Children's Behavioral Problems: A Longitudinal Analysis 
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下载免费PDF全文 Elisabeth A. Garratt Tarani Chandola Kingsley Purdam Alex M. Wood 《Child development》2017,88(4):1302-1320
Children living in low‐income households face elevated risks of behavioral problems, but the impact of absolute and relative income to this risk remains unexplored. Using the U.K. Millennium Cohort Study data, longitudinal associations between Strengths and Difficulties Questionnaire scores and absolute household income, distance from the regional median and mean income, and regional income rank were examined in 3‐ to 12‐year‐olds (n = 16,532). Higher absolute household incomes were associated with lower behavioral problems, while higher income rank was associated with lower behavioral problems only at the highest absolute incomes. Higher absolute household incomes were associated with lower behavioral problems among children in working households, indicating compounding effects of income and socioeconomic advantages. Both absolute and relative incomes therefore appear to influence behavioral problems. 相似文献
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ABSTRACTThe nature of academic librarianship is changing as librarians move away from the curation of material and into research support roles. Although this creates new opportunities it can be difficult for staff to learn the skills needed. The Office of Scholarly Communication at Cambridge University seeks to address this issue with the Research Support Ambassadors Programme, an initiative which skills staff in areas such as Research Data Management and Open Access. This case study outlines the evolution of the program from its pilot through to its recently completed second run in 2016. The challenges associated with running a cross-library training program are discussed and solutions highlighted. Also discussed is the impact that the program has had on participants. This case study will be of interest to those aiming to pursue a career in this area of librarianship and those looking at preparing staff for the future of the academic library. 相似文献
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The universities and the government in Sri Lanka 总被引：1，自引：0，他引：1
Kingsley De Silva 《Minerva》1978,16(2):251-272
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This article summarizes the effects of the increasing global trend towards measuring research quality and effectiveness through, in particular, publication‐based metrics, and its effects on scholarly communication. Such metrics are increasingly influencing the behaviour patterns of administrators, publishers, librarians, and researchers. Impact and citation measures, which often rely solely on Thomson Scientific data, are examined in the context of university league tables and research assessment exercises. The need to establish alternate metrics, particularly for the social sciences and humanities, is emphasized, as is an holistic approach to scholarly communication agenda. 相似文献
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Teacher efficacy, or teachers’ feelings about their abilities in the classroom, remains a major component of educational research. We know that despite participating in shared or similar experiences, some preservice teachers (PSTs) develop feelings of teacher efficacy and some do not. Yet, in-depth examinations into the specific practices of successful host schools are scarce in the deep field of teacher efficacy research. We examine the deliberate actions of one Midwestern elementary school to establish a climate and co-teaching process that deliberately seeks to foster PST success and feelings of confidence in the classroom. We also discuss implications for teacher education. 相似文献
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Kingsley Banya 《Assessment & Evaluation in Higher Education》1995,20(2):213-224
As part of a longitudinal research study started in 1984, the purpose of this paper is to critically examine the issue of quality in an Integrated Rural Development project in Sierra Leone. An in-depth study was conducted (1990-93) to assess pre-service teacher quality, using two major indices: teacher knowledge base of subject-matter and teacher beliefs about teaching and classroom management. The results indicate that quality is affected by what knowledge teachers possess in a given subject area and their perceptions of teaching. This research is a departure from the traditional areas of looking at quality in education, that is from what happens to students in the education process to the issue of the quality of education teachers receive during their training. 相似文献