国际学术出版开放式访问(OA):Ⅱ.开放访问期刊"作者付费模式"的实践与争论   总被引：3，自引：2，他引：1  

李若溪  Fytton Rowland 《编辑学报》2006,18(4):315-318

综述当前国际学术出版界开放访问(OA)运动实践和理论研究的热点问题之一--OA期刊的"作者付费模式".讨论该经营模式的收费来源和方式,经营成本估算和现行的价格标准.对比了OA期刊与传统期刊的经营模式的区别和利弊,分析了OA期刊的可持续发展存在的问题.  相似文献   

Cytotoxicity and effect of extraction methods on the chemical composition of essential oils of Moringa oleifera seeds     

Rowland Monday Ojo Kayode  Anthony Jide Afolayan 《Journal of Zhejiang University. Science. B》2015,16(8):680-689

Renewed interest in natural materials as food flavors and preservatives has led to the search for suitable essential oils. Moringa oleifera seed essential oil was extracted by solvent-free microwave and hydrodistillation. This study assessed its chemical constituents. Cytotoxicity of the oils was investigated using hatchability and lethality tests on brine shrimps. A total of 16 and 26 compounds were isolated from the hydrodistillation extraction (HDE) and solvent-free microwave extraction (SME) oils, respectively, which accounted for 97.515% and 97.816% of total identifiable constituents, respectively. At 24 h when the most eggs had hatched, values of the SME (56.7%) and HDE (60.0%) oils were significantly different (P<0.05) from those of sea water (63.3%) and chloramphenicol (15.0%). Larva lethality was different significantly (P<0.05) between HDE and SME oils at different concentrations and incubation periods. The median lethal concentration (LC₅₀) of the oils was >1000 mg/ml recommended as an index for non-toxicity, which gives the oil advantage over some antioxidant, antimicrobial, therapeutic, and preservative chemicals.  相似文献   

Stylistic Variation at the "Single-Word" Stage: Relations between Maternal Speech Characteristics and Children's Vocabulary Composition and Usage     

Julian M. Pine  Elena V. M. Lieven  Caroline F. Rowland 《Child development》1997,68(5):807-819

In this study we test a number of different claims about the nature of stylistic variation at the "single-word" stage by examining the relation between variation in early vocabulary composition, variation in early language use, and variation in the structural and functional propreties of mothers' child-directed speech. Maternal-report and observational data were collected for 26 children at 10, 50, and 100 words, These were then correlated with a variety of different measures of maternal speech at 10 words, The results show substantial variation in the percentage of common nouns and unanalyzed phrases in children's vocabularies, and singficant relations between this variation and the way in which language is used by the child. They also reveal singficant relations between the way in whch mothers use language at 10 words and the way in chich their children use language at 50 words and between certain formal properties of mothers speech at 10 words and the percentage of common nouns and unanalyzed phrases in children's early vocabularies, However, most of these relations desappear when an attempt is made to control for ossible effects of the child on the mother at Time 1. The exception is a singficant negative correlation between mothers tendency to produce speech that illustrates word boundaries and the percentage of unanalyzed phrases at 50 and 100 words. This suggests that mothers whose sprech provides the child with information about where new words begin and end tend to have children with few unanalyzed. phrases in their early vocabularies.  相似文献   

The purpose, design and use of examples in the teaching of elementary mathematics     

Tim Rowland 《Educational Studies in Mathematics》2008,69(2):149-163

This empirical paper considers the different purposes for which teachers use examples in elementary mathematics teaching, and how well the actual examples used fit these intended purposes. For this study, 24 mathematics lessons taught by prospective elementary school teachers were videotaped. In the spirit of grounded theory, the purpose of the analysis of these lessons was to discover, and to construct theories around, the ways that these novice teachers could be seen to draw upon their mathematics teaching knowledge-base in their lesson preparation and in their observed classroom instruction. A highly-pervasive dimension of the findings was these teachers’ choice and use of examples. Four categories of uses of examples are identified and exemplified: these are related to different kinds of teacher awareness.

Tim RowlandEmail:

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‘Just turn to us’: the persuasive features of contract cheating websites     

Susan Rowland  Christine Slade  Kai-Sheng Wong  Brooke Whiting 《Assessment & Evaluation in Higher Education》2018,43(4):652-665

Academic integrity is important to universities and students must abide by codes of academic conduct around assessment. Students are, however, subject to multiple pressures around assessment, some of which can push them to cheat. Modern contract cheating websites are the fronts for sophisticated, commercial operations that offer individually written assessment items for a fee; to combat their use we need a better understanding of the tools they use to persuade students to become customers. In this study we examined the persuasive features of 11 highly-visible contract cheating websites and mapped these features to a previously used persuasiveness framework. We find that contract-cheating websites use a variety of credibility, interactive and informative features designed to persuade students to use their services. In addition, the sites offer low-cost, customisable products available in very short timeframes. We suggest ways in which educators can encourage academic integrity by talking with their students about how the websites promulgate their ‘just turn to us’ message.  相似文献   

Collegiality and intellectual love     

Stephen Rowland 《British Journal of Sociology of Education》2008,29(3):353-360

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Coloured overlays and their benefit for reading     

Arnold Wilkins  Elizabeth Lewis  Fiona Smith  Elizabeth Rowland  Wendy Tweedie 《Journal of Research in Reading》2001,24(1):41-64

Children in mainstream schools compared text on white paper with identical text covered in turn by each of ten differently‐coloured plastic overlays. More than 50% reported improved perception with one or more colours, and were given the best colour to use. About half used the overlays for more than three months and their reading speed increased when the overlays were used. In Study I children were examined twice using different methods and examiners. 47% chose the same colour on both occasions, and showed the greatest improvement in reading fluency, reliable at retest. In Study II children were issued with a random colour, and the greatest improvements in reading speed occurred when the random colour was the same as that previously chosen. Phonological reading strategies were not related to visual symptoms, or the benefit from overlays. Across individuals, reading speed varied by a factor of more than three, for good and poor readers. Study III provided estimates of the prevalence of improvements based on a sample of 426 children from 12 schools: 5% of children read more than 25% faster with a coloured overlay.  相似文献   

Career Decision-Making Skills of High School Students in The Bahamas     

Karen D. Rowland 《Journal of Career Development》2004,31(1):1-13

The purpose of the study was to examine the confidence level in career decision-making of Bahamian adolescents in the high schools in Nassau, Bahamas, investigating factors that influence one's level of confidence in career decision-making. The Career Decision Scale along with a demographic survey were administered to 385 11th and 12th graders to examine six factors which measured the effects and/or interaction effects of influences on confidence in career decision-making. Two MANOVAs and the appropriate follow-up statistics (Tukey's Honestly Significant Difference post hoc tests) were used to determine differences and interaction effects among the variables measuring the level of career decision-making skills. Based on the findings of the study the researcher concluded that for Bahamian adolescents, the type of school, the grade level, and a visit to the school guidance office were significant factors that influenced one's level of confidence in career decision-making.  相似文献   

Planning a master’s program in publishing     

Rowland Lorimer 《Publishing Research Quarterly》1990,6(1):38-47

The Canadian Centre for Studies in Publishing at Simon Fraser University is about to admit its first students. This article describes the founding of the Centre and the evolution of its curriculum. In its present form, the curriculum combines advice from the industry and the academic requirements of the university. Rowland Lorimer is professor of communication at Simon Fraser University. He is director of the Centre for Canadian Studies and co-director (Research and Credit Curriculum), Canadian Centre for Studies in Publishing. He is active in research in publishing policy and mass communications.  相似文献   

儿童青少年运动员的营养需要     

Oded Bar-Or　Linda Houtkooper　Susan Barr　Anita Rivera-Brown　Michael Bergeron　Tom Rowland　Ruth Carey　Suzanne Steen　Priscilla Clarkson 《体育科学》2001,21(5):89-93

1. 儿童青少年运动员应该食用多样化的食物，其中，蛋白质应占膳食总能量的12％-15％，碳水化合物至少占55％，而脂肪至多占30％。日常生活中如何吃才能满足这些要求呢？膳食指南宝塔提供了一条可行之道。2.有些营养素对热爱运动的儿童青少年运动员非常重要，要保证摄入充足，这些营养素是碳水化合物（包括纤维素）、维生素B6、维生素D、铁、钙、镁、锌、铬。科学合理、包罗各类食物的平衡膳食，对青少年运动员最大程度地全面摄取各种营养素，满足生长发育和运动训练的需要，是非常必要的。3.鼓励儿童青少年运动员在运动训练前、中、后进行补液，以避免脱水的发生。4.如果膳食合理平衡，就没必要额外补充营养品。  相似文献