Lifting Titan''s Veil: Exploring the Giant Moon of Saturn     

Donald M. Hunten 《Endeavour》2002,26(4)

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The approximate frequency response of semi-active systems requiring no computer     

Donald L. Margolis 《Journal of The Franklin Institute》1983,316(3):261-271

Semi-active systems are those in which a passive, dissipative element (damper, friction clutch, fluid orifice) is modulated, via low power inputs, to enhance the performance of its associated dynamic system. This type of control is inherently nonlinear, thus forcing the closed-loop response of the total system to be determined numerically using a digital computer. Although, strictly speaking, the frequency response for nonlinear systems does not exist, it is typical to simulate semi-active systems with sinusoidal input and present results as frequency transmissibilities. This paper uses energy dissipation per cycle to determine an approximate frequency response of semi-active systems requiring only a calculator for numerical analysis.  相似文献   

Engaging adolescents with LD in higher order thinking about history concepts using integrated content enhancement routines     

Bulgren J  Deshler DD  Lenz BK 《Journal of learning disabilities》2007,40(2):121-133

The understanding and use of historical concepts specified in national history standards pose many challenges to students. These challenges include both the acquisition of content knowledge and the use of that knowledge in ways that require higher order thinking. All students, including adolescents with learning disabilities (LD), are expected to understand and use concepts of history to pass high-stakes assessments and to participate meaningfully in a democratic society. This article describes Content Enhancement Routines (CERs) to illustrate instructional planning, teaching, and assessing for higher order thinking with examples from an American history unit. Research on the individual components of Content Enhancement Routines will be illustrated with data from 1 of the routines. The potential use of integrated sets of materials and procedures across grade levels and content areas will be discussed.  相似文献   

Truth(s), Fiction,and Storytelling in Performance Improvement     

Donald J. Winiecki 《Performance Improvement》2015,54(3):10-14

The consulting‐oriented field of performance improvement is ideally based on a radically empirical foundation. We are supposed to be data driven and evidence based and to derive all of our processes and all of our advice to clients from empirical evidence (which can be either qualitative or quantitative) that allows us to make clear and distinct links from cause to effect. But much of the time we are simply unable to make conclusions based solely on actual performance data that unambiguously shows us a clear path for identifying gaps and effecting changes. In such a case, what is an earnest professional to do? The answer is, tell a story and change it as you go.  相似文献   

Response to Intervention in Middle Schools: Practices and Outcomes     

Sara Prewett  Daryl F. Mellard  Donald D. Deshler  Justin Allen  Ryan Alexander  Amelia Stern 《Learning disabilities research & practice》2012,27(3):136-147

Response to intervention (RTI) is advocated in elementary school as a system‐wide, multitiered model of academic and behavioral interventions. Middle schools have begun adopting RTI models based on these existing elementary models. This investigation into current middle school RTI practices describes technical aspects as well as some of cultural and contextual issues surrounding implementation. The study included multiple data collection procedures including surveys, discussion groups, phone interviews, and site visits. Although many schools reported substantial progress with implementation, they recognized rigorous implementation of RTI posed such on‐going challenges as changes in staffing, curricular realignments, very limited selections of screening and progress monitoring tools aligned with their curriculum, and scheduling of secondary and tertiary level interventions.  相似文献   

Crisis in Elementary Education     

Donald L. Barnes 《The Teacher Educator》2013,48(1)

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Tough acts to follow: the challenges to science teachers presented by biotechnological progress     

Donald Gray 《International Journal of Science Education》2013,35(6):717-733

The public controversies associated with biotechnological progress (genetic modification, cloning, and so forth) increasingly impact upon biology teaching in school; teachers find themselves engaged in discussions with pupils on value‐laden issues deriving from the social and ethical implications of the ‘new science’. The research described in this paper focused upon the thinking of a sample of 41 biology teachers as they endeavoured to implement the first year of the new Scottish Advanced Higher Biology course and to face the challenges associated with these controversies. Following questionnaire returns, the investigation employed semistructured, in‐depth interviews with 10 teachers and, separately, with their 61 pupils (17–18 years of age) and was part of a medium‐term to long‐term evaluation of a university summer school that had endeavoured to update these teachers on recent biotechnological advances. While teachers were found to be fairly positively disposed to handling discussion of such contentious matters, they were none‐too‐clear as to its precise merits and functions; many lack confidence in handling discussion. The research indicates that much needs to be tackled by way of professional development for science teachers now engaged in dimensions new to science teaching.  相似文献   

Communicating in Education and Training     

Donald Grattan 《Educational Media International》2013,50(3):123-127

Abstract

This article maintains that the focus of learning and training at all levels is moving increasingly towards the individual ‐‐ how the individual learns and the influences of his or her environment on learning. It suggests that, among the increasing wealth of research into educational technology, the emphasis needs now to be placed on the learning process and the learning environment. But the learning processes and environments have to be seen as part of an educational scenario which is changing rapidly. Education at all levels, together with training at the adult level, and the resources devoted to these purposes will continue to be under direct challenge. To make learning more effective, the questions of contacts and connections by and with media must be examined and assessed. For effective communication the methods and the processes have to be matched to objectives. The article concludes that the rapidly changing technology of communications is helping to shift the balance from an emphasis on what has been largely a one‐way system of communication to one in which the individual learner is increasingly in control and in which the learning process itself, rather than the teaching system, has become the focus.  相似文献   

Resisting ghettoization and expanding the boundaries of diversity education: The possibilities of antioppressive pedagogy     

Donald Fraynd 《International journal of qualitative studies in education》2013,26(3):467-472

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Comment on: “Generation of Horsepower at Low and High Velocity By Sprinters and Distance Runners”     

Donald Watson 《Research quarterly for exercise and sport》2013,84(1)

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