Theoretical elastoplastic analysis for foundations with geosynthetic-encased columns     

Yuan-yu Duan  Yi-ping Zhang  Dave Chan  Ya-nan Yu 《浙江大学学报(A卷英文版)》2012,13(7):506-518

As a new technique in ground improvement, geosynthetic-encased columns (GECs) have promising applications in soft soil foundation. By assuming yielding occurs in the columns while the surrounding soil and the geosynthetic remain elastic, an elastoplastic analytical procedure for foundations improved by GECs is proposed. The radial stresses that the geosynthetic provides and the elastoplastic deformations of the foundation resting on a rigid base are derived. A comparison with finite element analysis shows that the proposed method is effective and can provide a reasonable prediction of a GEC??s deformation. Subsequent parametric analysis indicates that higher geosynthetic stiffness leads to better performance of the composite foundation. The optimum length of encasement is related to the load acting on the foundation and the permissible vertical and radial displacements of the column. Moreover, as the dilation angle of the column increases, the settlement decreases, especially under high loading. The influence of the encasement is more significant in soils with smaller elastic modulus.  相似文献   

A comparison of searching the Cochrane library databases via CRD,Ovid and Wiley: implications for systematic searching and information services     

Jenny Craven  Jayne Jefferies  Jenny Kendrick  Dave Nicholls  Janette Boynton  Ruth Frankish 《Health information and libraries journal》2014,31(1):54-63

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Production Guides     

Martin Clifford  James Carroll  Ronald Sherriffs  Harry Kybett  Dave Ingram  G. Paul Smeyak 《Communication Booknotes Quarterly》2013,44(1)

Martin Clifford's Microphones: How They Work and How to Use Them (Blue Ridge Summit, Pa.: TAB Books, 1977—$8.95/ 5.95)

James Carroll and Ronald Sherriffs, TV Lighting Handbook ($12.95, 226 pp.)

Harry Kybett, The Complete Handbook of Videocassette Recorders ($9.95/5.95, 280 pp.)

Dave Ingram, The Complete Handbook of Slow-Scan TV ($14.95/9.95, 304 pp.)

G. Paul Smeyak's Broadcast News Writing (Columbus, Ohio: Grid Publishing, 1977—$7.95, paper)  相似文献   

Telecommunications     

Robert Lee Chartrand  James W. Norentz Jr.  Rosario Joseph Tosiello  James E. Brittain  Harry L. Van Trees  Dave Ingram 《Communication Booknotes Quarterly》2013,44(8):168-170

Robert Lee Chartrand and James W. Norentz, Jr., eds. Information Technology Serving, Society (Oxford and New York: Pergamon Press, 1979—E12.50/$25.00)

Rosario Joseph Tosiello, The Birth and Early Years of the Bell Telephone System: 1376-1880 (New York: Aicno Press, 1979—$32.00)

James E. Brittain, ed. Turning Points in American Electrical History (New York: Institute of Electrical and Electronic Engineers Press [dist. by John Wiley], 1977– $20.00, paper)

Harry L. Van Trees, ed. Satellite Communications (New York: IEEE/John Wiley, 1979—$27.00, paper with a hardback edition available)

Dave Ingram's Oscar: The Ham Radio Satellites (Blue Ridge Summit, Pa: Tab Books, 1979—$8.95/4.95)

Clayton Hallmark's How to Repair Old-Time Radios (Blue Ridge Summit, Pa.: Tab Books, 1979—$12.95/7.95)

Telecommunications Law Reform (American Enterprise Institute for Public Policy Research, 1150 17th St. NW, Washington, D.C. 20036 —price not given, paper)  相似文献   

The Rise and Fall of a Mechanical Rhetoric,or, What Grain Elevators Teach us About Postmodernism     

Dave Tell 《Quarterly Journal of Speech》2013,99(2):163-185

I use the one-hundred-year, transatlantic circulation of Le Corbusier's grain elevator photographs to tell the story of the short but vibrant life of a mechanized rhetoric. From 1913 to 1969, these photographs were understood in the context of a mechanized rhetoric, and they starred in the iconography of modernity. From 1971 to 2010, the same photographs were contextualized by a symbolic vision of rhetoric. So contextualized, the photographs lost their prestige and became conduits through which postmodernism was introduced into architectural theory—and from there into the American academy. As a case study of rhetoric's becoming-symbolic, then, this essay foregrounds the opportunity costs of symbolic definitions of rhetoric. It suggests that the twinned introduction of symbolism and postmodernism involved a misreading of rhetorical history.  相似文献   

Stress and anxiety surrounding forthcoming Standard Assessment Tests in English schoolchildren     

Dave W. Putwain  Liz Connors  Kevin Woods  Laura J. Nicholson 《Pastoral Care in Education》2013,31(4):289-302

The Standard Assessment Tests (SATs) taken by pupils in their final year of primary schooling in England have been widely criticised for placing children under too pressure and contributing to an increase in test-related stress and anxiety. In this exploratory study we set out to explore the experiences of forthcoming SATs in a small sample of children using an appraisal model of stress and to reflect on whether these criticisms are justified. Results from focus groups with pupils and interviews with class and head teachers suggested that there was diversity in pupils’ experiences their tests. The pressures associated with SATs did not necessarily lead to negative outcomes and some children described SATs in more positive ways, as challenging rather than threatening. Self-worth judgements played a central role in individual-level appraisal and may also provide a useful link to discourses surrounding the value of academic credentials.  相似文献   

Use and rationale of media types in performance‐centered design     

Dave Schubert 《Performance Improvement》2002,41(10):34-38

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Adaptive expertise – a characteristic of expertise in outdoor instructors?     

Alice Mees  Dean Sinfield  Dave Collins 《Physical Education & Sport Pedagogy》2020,25(4):423-438

ABSTRACT

Background: Over the past 10 years, research has started to investigate the pedagogic practices of instructors and coaches working in adventure sports settings. Outdoor instructors face particular challenges regarding the impact the dynamic environment has on the coaching process and their students. This challenging combination of factors obliges the instructor to be agile in response. We propose that this adaptive expertise is characteristic of these factors and that adaptability may be a beneficial focus of outdoor instructor training and education.

Purpose: The major aim was to identify if adaptive expertise is an attribute of outdoor instructors? And if so, what are its characteristics in this context?

Research design and data collection: We applied a mixed methodology to a sample of outdoor instructors (n?=?64). The instructors were asked to complete a quantitative adaptive expertise inventory. We then interviewed a selected sub-sample (n?=?12).

Participants and setting: Quantitative data was collected from outdoor instructors working in the UK (n?=?64). The sample consisted of instructors qualified to work independently with groups in adventurous settings in a range of activities. Qualitative data was collected from a smaller sample (n?=?12) via a series of thematically analysed semi-structured interviews.

Findings: Results suggest that the participating outdoor instructors have high levels of adaptive expertise. A characteristic of that adaptive capacity is a combination of skills revolving around reflection, metacognition, and situational awareness. There were differences, however, between less and more experienced outdoor instructors in their adaptive capacity, with less experienced instructors being adaptive to a lesser extent.

Conclusions: The implication is that further research is worthwhile to examine the development of instructors’ adaptive capacity. The training and education of outdoor instructors requires pedagogic approaches that facilitate and engender adaptability, flexibility and agility in neophyte instructors.  相似文献   

Multi‐site Case Study: some recent practice and the problem of generalisation     

Dave Ebbutt 《Cambridge Journal of Education》1988,18(3):347-363

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The foci of in-action professional judgement and decision-making in high-level adventure sports coaching practice     

Loel Collins  Dave Collins 《Journal of Adventure Education & Outdoor Learning》2017,17(2):122-132

This article continues a theme of previous investigations by the authors and examines the focus of in-action reflection as a component of professional judgement and decision-making (PJDM) processes in high-level adventure sports coaching. We utilised a thematic analysis approach to investigate the decision-making practices of a sample of high-level adventure sports coaches over a series of sessions. It was discovered that adventure sports coaches utilise a combination of questioning and observation to collect and constantly verify the information that forms the basis of their PJDM. Each coach responds to matters of immediate security, collecting information until a best-fit decision can be made regarding changes to the environment, task or individual. Implications for professional training, accreditation and development are presented against these data, offering a template for a more expertise-focused progression in the adventure sports coaching profession.  相似文献