最优二叉树在通信编码中的应用

字符出现的频率不同,在传输中采用非等长二进制编码传输会提高传输效率,在字符的出现频率已知前提下,采用最优二又正则树算法,可以得到最佳前缀码.     

周谷城教育活动纪实

周谷城是我国现当代著名历史学家、教育家。本文系学习研究周谷城教育思想的初步探索，仅以时空为序，着重记述他的教育实践活动，同时介绍其政治活动、科研成果及与毛泽东的交往。     

Mentoring of Women Faculty: The Role of Organizational Politics and Culture

This article reports on a key finding of a phenomenological study on the mentoring experiences of women faculty. The study revealed the political climate of the organization as an essential attribute of this experience. Women faculty identified organizational culture and gender issues that affected the mentoring they received. This study suggests the need for human resource and organization development initiatives to facilitate the provision of academic mentoring for women faculty—individually, departmentally, and culturally—as a means to foster transformation and change in academic institutions.Sharon K. Gibson is an Assistant Professor of organization learning and development at the University of St. Thomas. She received her Ph.D. in adult education from the University of Minnesota. She holds an M.S.W. degree and graduate certificate in labor and industrial relations from the University of Michigan and a B.S. from Cornell University. Her research interests focus on developmental relationships including mentoring and coaching, strategic human resource and organization development, and adult learning.     

Learning styles in engineering education: the quest to improve didactic practices

This article discusses a dilemma that engineering educators encounter when attempting to develop pedagogical methods: that of finding efficient and scientifically valid didactic practices. The multitude of methods offered by educational consultants is perplexing. Moreover, the popularity of commercially offered solutions such as learning styles testing makes them appear attractive. The study presents one case of application of learning styles, the consequent problems and evaluation of results. It concludes that the use of learning styles is not supported by current pedagogical theories. Practices to foster interdisciplinary understanding between learning sciences and engineering are proposed in order to improve engineering education, most notably collaborative projects between university departments.     

Explanations of attitudes to change: Colombian mathematics teachers’ conceptions of the crucial determinants of their teaching practices of beginning algebra

This article arises from a study whose overall purpose was to investigate the relationship between Colombian mathematics teachers’ conceptions of beginning algebra and their conceptions of their own teaching practices. The teachers’ understandings of their teaching practices were explored with a view to unravelling their conceptions of change in their teaching. Focusing on the perspectives of teachers afforded opportunities that exposed the powerful role that the teachers’ conceptions of social/institutional factors of teaching played in their conceptions of their practices. The degree to which the teachers attributed these (external) factors as crucial reasons for what they do in their teaching was the basis of a categorisation of their conceptions of the crucial determinants of their teaching practices into three types. The findings are particularly relevant to our understanding of the stability of mathematics teaching approaches in the Colombian context but have likely implications for a range of international education contexts. Specific implications for the development of the research into teachers’ conceptions of mathematics and its teaching, and for teacher education programmes are presented.

大学英语教师修正性反馈信念与课堂教学行为关系研究

教师教学信念影响其教学行为,也是预测教师教学质量和教学效果的最有效指标。文章运用课堂观察、深度访谈和刺激性回忆法,聚焦于三位英语专业精读课教师的教学信念和课堂行为,通过对所得数据进行定量和定性分析发现：由于个体差异,不同教师所持的教学信念互不相同,他们的课堂教学行为也存在巨大差异;同一教师持有内部相矛盾的信念,但这种个人内部矛盾的信念会随着教学经验的丰富和专业知识不断程序化而减弱;由于教学环境和教师所调用的知识的不同,同一教师的教学信念和教学行为之间虽具有一定的联系,但二者之间具有很大的差异。这就要求广大教师要不断反思自己的教学,积极开展行动研究,注意发展和完善自己的教学信念体系,努力促进专业知识的程序化,以应对复杂多变的课堂教学环境。     

国际成功校长项目——中、美、澳三国成功校长比较研究

从跨文化的视角选择中国、美国、澳大利亚这三个参与国际成功校长项目的国家,考察和比较在不同文化背景下三个国家对于成功校长的认识标准以及成功校长领导行为的异同可以发现:中国和美国把对成功校长的评判标准放在了学生的成绩上,而澳大利亚除了关注学生的成绩,还扩展到学生的成就,包括学生参与、学生的社会表现等。另外,学校的特色课程设置、校长的声望以及学校的声望也成为选取的标准。在对成功校长领导行为的研究中,雷斯武德等人的校长领导行为分类在各个国家均得到验证。此外,研究者还发现了一些新的校长领导行为。     

New Counselor Educators’ Scholarly Productivity: Supportive and Discouraging Environments

Eighteen new counselor educators shared in‐depth reports of their efforts to establish an early record of scholarly productivity, critical to their success in academe. Analyses of their experiences using consensual qualitative research methods revealed components of both highly positive and highly discouraging program environments and their impact on participants’ research goals.     

药物制剂技术专业仿真工学结合教学方法改革实践

工学结合教学模式是现代高等职业教育中教学方法改革的方向和目标,是培养高等职业专业人才的有效途径。结合我校药物制剂技术专业的特点,对仿真工学结合的实训教学模式作为工学结合的一种补充,进行了有效的尝试,取得了突破性进展。