Gardnerella vaginalis infection and sexual contact in female children

Gardnerella vaginalis (GV) infection has been reported as being acquired via sexual contact in adults and as an indicator of sexual contact in female children (DeJong, 1985). The purpose of this study was to determine if GV infection was more commonly found in 191 female children who gave a history of sexual contact and/or were infected with Neisseria gonorrhoeae (GC) or Chlamydia trachomatis (CT) (Group 1), compared with 144 female children evaluated for possible sexual abuse and found to have no such history or infection with GC or CT (Group 2), or 31 female children (friends of the authors) without such a history or GC or CT infection (Group 3). Vaginal GV was found in 5.3% of Group 1, 4.9% of Group 2 and 6.4% of Group 3 (p > .05). Also, vaginal GV infection was not related to the type of sexual contact or race, but did increase with age in white female children. Because vaginal GV infection is not more commonly found in children with a history of sexual contact than those without such a history, the finding of GV in a vaginal culture in an individual case would not be a reliable marker of sexual contact. Routine culturing for GV is not recommended as part of a sexual abuse workup.     

Ureaplasma urealyticum and large colony mycoplasma colonization in female children and its relationship to sexual contact, age, and race.

In order to determine if Ureaplasma urealyticum (Uu) or large colony mycoplasma (LCM) colonization was related to a history of sexual abuse, the type of sexual contact, an enlarged vaginal introitus transverse diameter (greater than 4 mm), age or race, 452 female children, ages 1-12 years, were evaluated by the Child Sexual Abuse Team at Wake Medical Center in Raleigh, NC. Thirty-six girls were deleted because of inadequate cultures. When controlled for race and age, Uu throat (T), vaginal (V), and rectal (R) colonization and LCM vaginal and rectal colonization were not related to any of the other variables listed above. The enlarged vaginal introital diameter was related to a history of sexual abuse (p less than .001). Uu and LCM vaginal colonization rates were increased in black girls as compared to white girls (p less than .05). Uu V, Uu R, LCM V, and LCM R colonization increased with age. In our study population, Uu and LCM colonization was not a useful marker of sexual contact.     

An introduction to education research methods: exploring the learning journey of pre-service teachers in a transnational programme

Internationally there is interest in developing the research skills of pre-service teachers as a means of ongoing professional renewal with a distinct need for systematic and longitudinal investigation of student learning. The current study takes a unique perspective by exploring the research learning journey of pre-service teachers participating in a transnational degree programme. Using a case-study design that includes both a self-reported and direct measure of research knowledge, the results indicate a progression in learning, as well as evidence that this research knowledge is continued or maintained when the pre-service teachers return to their home university. The findings of this study have implications for both pre-service teacher research training and transnational programmes.     

Teacher educators for new times? Redefining an important occupational group

Teacher educators are an occupational group currently experiencing increased scrutiny by international policy makers and researchers alike. This occupational group however is increasingly difficult to define and identify in a complex, internationally changing teacher education policy reform environment. The question posed is an enduring one: who is a teacher educator? The answer is more complicated. To better understand this occupational group, a literature review and local policy analysis study using the Australian context was conducted to reveal more about their identity; career trajectories and; professional learning needs. Analysis revealed that three sub-groups belonging to the broader teacher educator occupational group have emerged as a result of shifting teacher education policies. Namely, university-based; school-based and community-based teacher educators, each with an important role to play and each positioned differently within the research and policy landscape. Findings suggest that all three groups are important to educating teachers across their career and to best meet the needs of all students for new times. Recommendations are made for future research and practice into how these groups can work collectively together, within and across the multiple sites of learning to teach.     

Developments in style and purpose of research on the learning of science

Recent years have seen a substantial growth in research that probes children's ideas about natural phenomena. This article places the research in a context that enables comprehension of how it informs and influences the practice of science education. To this end, past, present, and developing styles of research are discussed. The predominant style of past research was based on elaborate experimental designs and complex statistical analyses of data. Studies employing that style helped focus concern on questions about individual learning which the studies did not actually seek to answer, e.g., why does the learning resulting from a particular treatment vary between individuals? What is understanding and how can it be assessed? Such questions lie at the heart of current probing of children's ideas. Some issues of importance in the probing of children's ideas are considered, as are ways in which these issues have influenced the development of a current style of research. From this present context, developing styles in the research field are described. These focus particularly on research on the strategies used by learners, and on the continued growth of interaction between research and practice.     

重放的鲜花 迟暮的春色——试论《重放的鲜花》的文学史意义

《重放的鲜花》的结集出版,使“百花时代”的“毒草”得以散发芳香,然而,“明日黄花”、“隔代的春色”不免给人迟暮之感,它在给人忧伤的同时也给当代人以多方面的启示。本文从“史”的角度探讨《重放的鲜花》的文本渊源、文学价值及其影响。     

中小学课程与网上学习的整合探讨

互联网络对传统的学校课程与课堂教学产生了巨大的冲击，传统的学校课程与网上学习的整合成为新的教育研究课题。面对目前中国中小学校园网的现状，针对网络教育的特点，提出了网上学习与课堂学习、发现式学习、研究性学习、创新性学习及协作式学习有机结合的教育模式。     

Dynamic mental models in learning science: The importance of constructing derivational linkages among models

We present a theory of learning in science based on students deriving conceptual linkages among multiple models which represent physical phenomena at different levels of abstraction. The models vary in the primitive objects and interactions they incorporate and in the reasoning processes that are used in running them. Students derive linkages among models by running a model (embodied in an interactive computer simulation) and reflecting on its emergent behaviors. The emergent properties they identify in turn become the primitive elements of the more abstract, derived model. We describe and illustrate derivational links among three models for basic electricity: a particle model, an aggregate model, and an algebraic model. We then present results of an instructional experiment in which we compared high school students who were exposed to these model derivations with those who were not. In all other respects, both groups of students received identical instruction. The results demonstrate the importance of enabling students to construct derivational linkages among models, both with respect to their understanding of circuit theory and their ability to solve qualitative and quantitative circuit problems. © 1999 John Wiley & Sons, Inc. J Res Sci Teach 36: 806–836, 1999