Human Values and Introductory Science     

Dennis J. Kelsh 《College Teaching》2013,61(4)

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Developments in electronography for astronomical research     

Dennis McMullan  Peter A. Wehinger 《Endeavour》1977,1(1):32-39

Astronomers are always interested in detecting and observing the faintest, most distant objects in the Universe. Electronography has the advantages over photography where it counts most—when observing the faintest objects. The technical problems involved in the development of electronography are here reviewed, and recent advances and observations with the RGO camera are described.  相似文献   

An informetric investigation of the relatedness of opportunistic infections to HIV/AIDS   总被引：1，自引：0，他引：1  

Omwoyo Bosire Onyancha  Dennis N. Ocholla 《Information processing & management》2005,41(6):1573-1588

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A Festschrift for Andy Hargreaves     

Dennis Shirley 《Journal of Educational Change》2011,12(2):131-139

Recent social policy reforms have sought to overcome the limitations of “First Way” strategies emphasizing the welfare state and “Second Way” approaches advocating markets. Scholars and policymakers instead have begun to explore optimal synthesis of the public and private sector in a new “Third Way” of leadership and change. According to one line of interpretation advanced by Andy Hargreaves and Dennis Shirley, however, the Third Way as developed in education has ushered in a new orthodoxy of testing, accountability, and data-driven decision making. This new orthodoxy is said to distract educators from their true moral purposes. Hence, Hargreaves and Shirley have called for a new “Fourth Way” of change that draws upon international best practices in education. In this interpretive essay for a Festschrift issue of the Journal of Educational Change celebrating Andy Hargreaves’ 60th birthday, Dennis Shirley revisits Fourth Way change architecture to inquire after the appropriate role of new technologies in classrooms and schools. He retrieves the concept of mindful teaching and learning from the Fourth Way change model and illustrates how it can be used as a lens to adjudicate various interpretations of the appropriate role of new technologies in schools.  相似文献   

黑社会的制衡     

DennisE.Shasha马永强  杨光 《科学中国》2003,(12):76-76

在校园，黑社会，以及国际事务中，一些组织总是试图用武力从其他组织手中掠夺财物。当他们拥有绝对的实力优势时，便会肆无忌惮地进行攻击，目标是获取财富。有时，个人或组织也会联合起来，组成一个临时聪盟以获取财富或阻止对手的进攻。  相似文献   

Plasticity of human menstrual blood stem cells derived from the endometrium     

Lin J  Xiang D  Zhang JL  Allickson J  Xiang C 《Journal of Zhejiang University. Science. B》2011,12(5):372-380

Stem cells can be obtained from women’s menstrual blood derived from the endometrium. The cells display stem cell markers such as Oct-4, SSEA-4, Nanog, and c-kit (CD117), and have the potent ability to differentiate into various cell types, including the heart, nerve, bone, cartilage, and fat. There has been no evidence of teratoma, ectopic formation, or any immune response after transplantation into an animal model. These cells quickly regenerate after menstruation and secrete many growth factors to display recurrent angiogenesis. The plasticity and safety of the acquired cells have been demonstrated in many studies. Menstrual blood-derived stem cells (MenSCs) provide an alternative source of adult stem cells for research and application in regenerative medicine. Here we summarize the multipotent properties and the plasticities of MenSCs and other endometrial stem cells from recent studies conducted both in vitro and in vivo.  相似文献   

‘You must be thinking what a lesbian man teacher is doing in a nice place like Dipane Letsie School?’: enacting,negotiating and reproducing dominant understandings of gender in a rural school in the Free State,South Africa     

Dennis Francis 《Gender and education》2014,26(5):539-552

In this article I explore two questions – how does, Thatho, a transgendered life orientation teacher enact, resist and reproduce dominant understandings of gender and sexuality in terms of his own identity and practice; and what specific possibilities, challenges and resistances exist for a transgender educator in the rural. Using life-history research, I show that Thatho challenges essentialist assumptions of gender and identity as he enacts multiple masculinities. My article troubles the common typification of men solely as hegemonic, marginalised or subordinate when indeed the actual accounts of their lives are far more fluid than these rigid distinctions. Thatho's enactment of multiple masculinities talks to the ‘durability or survivability of non-hegemonic patterns of masculinity’ outlined by Connell and Messershmidt [2005. “Hegemonic Masculinity Rethinking the Concept.” Gender & Society 19 (6): 829–859. doi:10.1177/0891243205278639], which in many ways characterises a well-crafted response to his own marginalisation and stigmatised sexuality. Yet, Thatho's narrative also suggests a significant flexibility in the gender order in Qwaqwa, which looks different from the sometimes inflexibility of rural society and in some research from the developed world and, perhaps, from some urban contexts in contemporary South Africa.  相似文献   

‘Role stretch’: assessing the blurring of teaching and non‐teaching in the classroom assistant role in Scotland          下载免费PDF全文

Chris Warhurst  Dennis Nickson  Johanna Commander  Kay Gilbert 《British Educational Research Journal》2014,40(1):170-186

With the increasing number of teaching and classroom assistants across the UK there is now much debate about what their role should be. In particular concerns have arisen about the extent to which they overstep the boundary from supporting teaching and learning into teaching pupils. This study assesses this issue within Scotland. It draws on a national survey of 2000 head teachers, teachers and classroom assistants and interviews with directors of education in nearly half of all Scottish local authorities. Findings from the research suggest a small number of classroom assistants in Scotland are overstepping the boundary into teaching. The paper concludes with an explanation as to why this is happening taking into account aspects such as local authority policy, school size and the individual characteristics of the classroom assistants.  相似文献   

Erfassung von Schülerselbsteinschätzungen zum schulbezogenen Sozial- und Lernverhalten – Validierung der Schülereinschätzliste für Sozial- und Lernverhalten (SSL)     

Annette Lohbeck  Dr. Dennis Nitkowski  Prof. Dr. Franz Petermann  Prof. Dr. Ulrike Petermann 《Zeitschrift für Erziehungswissenschaft》2014,17(4):701-722

The Self-Report Checklist for Social and Learning Behaviour (SSL) is a student questionnaire comparable to the Teacher Report Checklist for Social and Learning Behaviour. The SSL assesses ten facets of social and learning behaviour using self-reports by students. The present study of 1267 students aged 9 to 19 years examines the factorial structure, psychometric properties and validity of this questionnaire. The reliabilities (Cronbach’s Alpha, retest) of all ten scales were sufficiently good and the postulated factorial structure was found in exploratory as well as in confirmatory factor analysis. Correlations of SSL-scales with scales of the Differencial Aggression Questionnaire and the Strengths and Difficulties Questionnaire as well as with grades in German and mathematics indicated mainly convergent and divergent validity. Furthermore, positive correlations were found to corresponding teacher ratings.  相似文献   

A theoretical analysis of the role of social networks in entrepreneurship     

Dennis P. Leyden  Albert N. Link  Donald S. Siegel 《Research Policy》2014

Entrepreneurship involves innovation and uncertainty. We outline a theory of entrepreneurship, which highlights the importance of social networks in promoting innovation and reducing uncertainty. Our findings suggest that this “social” aspect of entrepreneurship increases the probability of entrepreneurial success. The results also lend credence to theories of entrepreneurship that suggest that entrepreneurial opportunities are formed endogenously by the entrepreneurs who create them. We also consider the public policy implications of our findings.  相似文献