直流磁场对铁磁性材料摩擦副减磨作用的分析     

徐永智  闫海涛 《安阳工学院学报》2010,9(6):4-7

对比有无磁场条件下铁磁性材料摩擦副的摩擦学性能,发现直流磁场的存在显著改善了铁磁性材料摩擦副的摩擦学性能。其主要原因是磁场的存在使磨屑保持摩擦副之间,从而铁磁性材料摩擦副的两体摩擦转变为摩擦副、磨屑之间的三体摩擦;同时,磁场的存在提高了氧化磨损在磨损中的比例。  相似文献   

Isotropic dual p-surface area measure     

俞武扬 《上海大学学报(英文版)》2010,14(6):437-441

It is shown that a convex body has minimal dual p-surface area among its affine transformations of the same volume if and only if its dual p-surface area measure is isotropic. A double-sided estimate for the （n-1）-dimensional volume of the intersection of a dual p-surface isotropic convex body in terms of its affine invariant dual p-surface quantity is given. Furthermore, the dual p-isopermetric inequality is obtained.  相似文献   

浅议小额保险及其可持续发展     

李迪文 《番禺职业技术学院学报》2009,8(2):42-45

从小额保险商业性与社会公益性的双重特征出发,通过对微型金融机构、一般的非政府组织、商业保险公司这三大承保机构的经营特征加以分析,阐述小额保险不同经营主体差异化的经营动机及各主体内在的局限性,从而提出相应的协调互补发展策略,并为促进小额保险在我国健康可持续的发展提出建议。  相似文献   

The reliance on unclaimed cadavers for anatomical teaching by medical schools in Africa     

Hope Gangata  Phatheka Ntaba  Princess Akol  Graham Louw 《Anatomical sciences education》2010,3(4):174-183

The study of gross Anatomy through the use of cadaveric dissections in medical schools is an essential part of the comprehensive learning of human Anatomy, and unsurprisingly, 90% of the surveyed medical schools in Africa used cadaveric dissections. Donated cadavers now make up 80% of the total cadavers in North American medical schools and all the cadavers used for dissection in the United Kingdom are donated. Because the sources of cadavers used in Africa are not clearly known, a questionnaire to gather information on cadavers used at medical schools was designed from the relevant literature and was sent by electronic mail to 123 Anatomy lecturers in 23 African countries (48 medical schools). Fourteen lecturers from 14 medical schools in ten countries responded to the questionnaires. The results indicate that, in most countries, the cadavers are unclaimed bodies from the hospitals and prisons, and the bodies of dead bandits. In South Africa and Zimbabwe, the donations are mostly from the white community, and medical school in the Islamic country of Libya is importing cadavers from India. The lack of knowledge about body donation programes and firmly held cultural and religious burial traditions may explain the lack of bequests from black communities. The use of unclaimed bodies may disproportionally affect people who were homeless and poor, criminals, people with fewer social links, and social outcasts. The Anatomy lecturers felt that there should be broader national awareness programes for body donations, although the benefits of this could take decades to materialize. Anat Sci Educ, 2010. © 2010 American Association of Anatomists.  相似文献   

From the moral to the neural: brain scans,decision-making,and the problematization of economic (ir)rationality     

Jean François Bissonnette 《Journal of Cultural Economy》2016,9(4):364-381

Advances in brain imaging techniques have opened new fields of investigation and often challenged conventional assumptions concerning human behaviour. This ‘neuromolecular gaze’ [Rose, N. &; Abi-Rached, J. (2013) Neuro: The New Brain Sciences and the Management of the Mind, Princeton University Press, Princeton, NJ] also heralds new ways of intervening in the regulation of social phenomena, based on the objectification of the cerebral processes that underlie individual conducts. Neuroeconomics applies this brain-centric perspective to the study of economic decision-making. This paper engages with the two dominant approaches in neuroeconomics. The first section concentrates on the work of Paul Glimcher, who considers economic models and their correlative notion of ‘utility maximization’ as providing the neurosciences with a theoretical framework as to how the brain solves decision problems. The second section discusses the findings of behavioural neuroeconomics, which attempts to model departures from the rationality axiom by measuring the cognitive and emotional biases that have their sources in the brain’s complex architecture. Whereas both strands of neuroeconomics rely on a benchmark of economic rationality, this paper argues that they reformulate in allegedly neutral neuroscientific terms a behavioural norm that is basically moral in nature. If rational decision-making conditions economic and indeed evolutionary survival, and yet if most people regularly fail as utility optimizers, then understanding the neural causes of such failures should help people better themselves and behave as good homines ?conomici.  相似文献   

Regulating readers' bodies: a discourse analysis of teachers' body talk     

Jessica Nina Lester  Rachael Gabriel 《Discourse: Studies in the Cultural Politics of Education》2017,38(5):688-700

In this paper, we report findings from a discourse analysis study of reading instruction in eight primary/elementary school classrooms in the United States. Drawing upon discursive psychology, we specifically examined 96 hours of reading comprehension instruction, with a focus on how teachers talked about the body during the instruction and noted how this gave rise to particular constructions of what it means to be a ‘good’ reader and/or learner. We discuss two patterns from the analysis of our data, including: (1) emphasized versus embedded physical control as essential to being a ‘successful’ reader, and (2), implicit physical control and freedom as essential to literacy learning and to students' identities as readers. We conclude by highlighting implications, with a focus on student identity.  相似文献   

月亮女神的生命创造-叶梦的散文     

周艳华 《广播电视大学学报》2003,(4):19-22

在冲击“身体禁忌”的勇敢的女性学之旅上，叶梦是当之无愧的先行。女性生存的内外积压下的心理焦虑，淬砺成叶梦对人生加倍积极的担当。她细腻地显现女人身体体验的快乐，热情讴歌女性生命创造的伟大，面对生存的虚无与荒谬，她强调女性人格独立的重要，显示了其女性意识的觉醒。  相似文献   

试析网络隐私权相关主体的权利和义务     

Wei Xinzheng) Feng Jun) 《石家庄铁路工程职业技术学院学报》2007,(1)

网络隐私权是隐私权在网络环境下的延伸。由于某些网络主体在“网络社会”中的地位或职能比较特殊,使得他们的行为与公民的网络隐私权息息相关。这类主体常见的主要有:某些政府机关、ISP、某些硬件或软件开发商、其他组织以及网络黑客等。因此我们要明确各类网络主体的权利和义务,以更好的保护公民的网络隐私权,尽可能的避免网络隐私侵权行为的发生。  相似文献   

药用石斛的组织培养及管理研究   总被引：4，自引：0，他引：4  

张伟  陈坤 《南阳师范学院学报》2004,3(6):41-44

对药用石斛进行组织培养及管理研究中发现，在附加了2.0mg/LBA和0.2mg/LIBA的改良N6培养基上，原球茎的诱导率可达95％以上；在分化增殖阶段，采用附加了0.1mg／LBA，5％～10％香蕉汁和5％～10％土豆汁的改良N6培养基上，可增殖达8～10倍；在生根壮苗阶段，采用附加了10％香蕉汁和0.2mg／LNAA的改良N6的培养基上，效果最佳。移栽以后，对石斛的田间生长采用科学合理的管理方式，可使石斛幼苗成活率大为提高。  相似文献   

Transgender young people’s narratives of intimacy and sexual health: implications for sexuality education     

Damien W. Riggs  Clare Bartholomaeus 《Sex education》2018,18(4):376-390

Abstract

Sexuality education as pedagogy is often fraught by the perceived requirement to balance the informational needs of young people with an investment in notions of childhood ‘innocence’. Nowhere is this perhaps more evident than in sexuality education that seeks to be inclusive of transgender young people, often resulting in the failure of such education to address the needs of such students. In an attempt at addressing the relative dearth of information about what transgender young people would like to see covered in sexuality education, in this paper we explore transgender young people’s accounts of intimacy and sexual health and consider what this means for school-based sexuality education. To do this, we analyse discussions of intimacy from the perspectives of transgender young people as narrated in a sample of YouTube videos. We conclude by advocating for an approach to sexuality education that largely eschews the gendering of body parts and gametes, and which instead focuses on function, so as to not only address the needs of transgender young people (who may find normative discussions of genitals distressing), but to also provide cisgender young people with a more inclusive understanding of their own and other people’s bodies and desires.  相似文献