对直道栏教学中学生的心理障碍及克服方法的探讨     

陈纪阳 《河北体育学院学报》2001,15(1):43-46

分析了跨栏步、栏间跑和全程跑的心理障碍及消除方法。  相似文献   

十字交叉法在化学计算中的应用     

伍惊涛 《安顺师范高等专科学校学报》2005,7(3):94-95

化学计算一直是各种考试的热点,因其涉及到的化学基本概念多,解法灵活多变,所以是中学化学教与学的重点、难点.文章主要从历年高考的试题中选取部分例题重点例析"十字交叉法"在化学计算中的应用.  相似文献   

渡江路线的数学模型讨论     

苏筱丽  彭涓  杨国颍 《兰州石化职业技术学院学报》2004,4(2):30-33

针对2003年的全国大学生数学建模竞赛中的渡江问题进行了讨论分析，建立了渡江问题的通用模型，通过对游渡角度的讨论，给出了游渡成功的基本条件和最佳游渡路线。  相似文献   

Ethno-national boundaries in the construction of “dirty-work” occupational identity: The case of nursing care workers in diversified workplaces     

《Int J Intercult Relat》2020

Diversified domains, such as workplaces, are suitable social fields for the study of ethnic identities, because identities are constructed through comparison and negation, that is, by identifying what or who the “other” is. In the present study I explore the talk of hands-on nursing care work, a stigmatized occupational field, to illuminate ethnic identities and the strategic boundary work that care workers conduct. The study is based on 14 months of field work and 51 interviews and observations at two Israeli geriatric wards with highly diverse staff. I show that actors negotiate their care worker identity by the opposite strategies of making and unmaking ethno-national boundaries. The first strategy denies and erases ethno-national boundaries by stressing universal professional values and individual virtues; the second one demarcates boundaries between ethno-national groups, using perceived cultural differences. The discussion addresses these antithetical evaluation frameworks in relation to theories of boundary making and unmaking.  相似文献   

Press Credentials and Hybrid Boundary Zones: The Case of WorldNetDaily and the Standing Committee of Correspondents     

Jordan M. Foley 《Journalism Practice》2020,14(8):933-953

ABSTRACT

Press credentialing practices are a vital, yet understudied site of scholarly research on journalistic norms and practices. Press credentialing not only structures internal professional hierarchies, but they also signify the boundaries of the journalistic field itself. This paper explores the legal and theoretical implications of press credentialing to cover the United States Congress, drawing on the concepts of boundary work and journalistic authority to demonstrate the material impact of the space between fields on professional legitimation in journalism. Using WorldNetDaily (WND) as a case study, I argue that the Standing Committee of Correspondents (SCC) occupies a hybrid boundary zone between the journalistic and political fields, generating a unique tension in First Amendment jurisprudence that places journalists in a paradoxical role as both the professional embodiments of free speech and its constitutional steward. The resulting jurisdictional conflict between the SCC and WND extends the relational model of journalistic authority by articulating how journalist-state relations can fundamentally augment the process of legitimation at its fuzzy boundaries. The relevance and implications for press credentialing practices in the digital age are discussed.  相似文献   

Responding to the challenge of providing stronger research base for teacher education: research discourses in the Norwegian national research school for teacher education     

Anna-Lena Østern 《Educational research; a review for teachers and all concerned with progress in education》2016,58(1):73-90

Background and purpose: The purpose of this article is to shed light on how the research projects of 140 PhD candidates in the National Research School for Teacher Education in Norway (NAFOL) respond to the challenges faced by Norwegian teacher education regarding the demand for higher competence and a stronger research base. The concept of NAFOL is of interest from an international perspective because of its focus on facilitating teacher educators to achieve a PhD. Since 2001, Norwegian educational policy has had a strong focus on strengthening teacher education and making it more research-based than before. From 2017, all new teachers in Norway are expected to take a master’s degree. In order to accomplish this, there is a need for many new supervisors with a PhD in teacher education institutions. NAFOL is a unique project: a consortium of 23 participating network institutions within teacher education. The research school includes 140 research fellows, all of whom wish to achieve a PhD suitable for work in teacher education. The research school is funded by the Norwegian Research Council, originally for a project period from 2010 to 2016. The research school has had a positive external midway evaluation, and the project period has been extended with four cohorts of students to the end of 2021. However, this study is the first one looking into the research projects of this young generation of teacher education researchers. The research question posed in this article is: how do the research projects of the NAFOL PhD candidates contribute to the research base in teacher education? Main argument: The main argument in this article is that the potential impact of this research school is dependent on the quality of the large number of PhD projects connected to teacher education and education in general developed within the research school. The quality is likely to be good because, among other reasons, these projects are scrutinised by the research school community. The challenges these research projects face, located as they are between solidarity regarding grants from the funds financing the PhD candidates, solidarity with the aims of education, and the wish to contribute to innovation, might prove to be able to be met. These research projects have the potential to create innovation in teacher education research through ‘border crossing’ between different educational discourses, as well as through creating new knowledge in meta-studies based on the results from several projects. Sources of evidence and method: In this article, project abstracts from 140 PhD candidates participating in NAFOL are analysed in terms of their theme and problem formulation. The analysis is inspired by discourse analytical thinking – namely that in a certain situation, several conditions for action exist. In this study, these conditions for action are made apparent in the choice of theme and problem formulation in the research projects. The content analysis is focused on ‘signal words’, because these words might signal positioning in different educational discourses. Results: In the study, three main discourses can be seen as influencing the choice of topic and the problem formulation in the projects: a goal-oriented educational discourse, a ‘Bildung’ (i.e. character formation, or personal growth – ‘danning’ in Norwegian) and democracy discourse, and a critical knowledge-producing discourse. These discourses are constituted when the PhD candidates start their research projects but the conditions for action are ever-changing and, hence, the findings in this study cannot, of course, be considered as ‘final’. The development of these discourses within the research community of NAFOL is one way of scrutinising the research projects in order to make a contribution to qualified teacher education research. Conclusion: ‘Border crossing’ between discourses in research projects concerned with what might be, and what can make a difference in a knowledge society could be a key way of enhancing the future for a young generation of researchers in teacher education. The research projects carried out by the PhD candidates in NAFOL have the potential to develop both new knowledge and new discourses of importance for Norwegian teacher education, as well as for a broader international context regarding professional development in teacher education and education in general. The view of the teacher education profession – and on what a teacher educator can be – could become more fully informed than before the candidates’ participation in the research school.  相似文献   

The problem-solving process as part of professionals’ boundary work in preschool to school transition     

Laura Rantavuori 《International Journal of Early Years Education》2018,26(4):422-435

ABSTRACT

A successful transition from preschool to school demands continuity in education between the institutions: continuity in pedagogy, values and institutional structures. One way to achieve continuity is to learn how to do boundary work in the borderline of two activity systems. This article examines what kinds of discourses frame the problem-solving process in the context of inter-professional collaboration. The data consists of video-recorded, inter-professional discussions in the 2012–2013 (a total of 22.5?h). The project, called Flexible Preschool and School, aims to develop a new model for a smooth transition to school. In the project, professionals from preschool and school create joint activities and co-teaching, which is assumed to bridge the gap between pedagogies and assure the continuity of learning. The professionals’ cultural thoughts in different kinds of problem-solving situations become visible in the discourses produced in the talk. These discourses describe their capacity for solving shared problems. Creating new innovations demands an understanding that complex problems require diverse knowledge. Considering the shared knowledge as valuable enough to put into practice is the way to create new forms of problem-solving. This is implemented by taking on the responsibility to be an active actor.  相似文献   

Boundary control of a linear distributed parameter bioprocess     

Hideki Sano 《Journal of The Franklin Institute》2003,340(5):293-306

This paper is concerned with boundary control of a linear distributed parameter bioprocess. Huang's result (Ann. Differential Equations 1(1) (1985) 43) on the spectrum determined growth assumption is applied to prove that the closed-loop system becomes exponentially stable under a certain condition with respect to the feedback gain. Moreover, it is shown that the decay rate of the open-loop system is given by letting the feedback gain tend to zero.  相似文献   

带参数的奇异三阶三点边值问题的正解     

曹珂 《河西学院学报》2011,27(5):4-10

本文讨论下述带参数的奇异三阶三点边值问题■其中γ>0是参数且a(t)在t=0和t=1处具有奇性,当f和a满足适当条件时,对一定取值范围内的γ,获得了上述边值问题正解的存在性与不存在性.所用主要工具是Guo-Krasnoselskii不动点定理.  相似文献   

Talking about the test. Boundary work in primary school teachers' interactions around national testing of student performance     

《Teaching and Teacher Education》2013

There is currently a strong belief in accountability as a policy of action and standardized testing has been implemented in several countries. This article examines tensions that occur in meetings when primary school teachers in Norway discuss national testing, and how these are handled. In particular, tensions revolve around what is seen as internal (teachers' everyday work) and external (policies and practices outside the main frame of teaching). Even though national testing is mainly seen as external to teachers' work, teachers involve in boundary work and reshape professional discourse in order to create relevance and maintain legitimacy following new expectations.  相似文献