Multiple perceptions of children's aggression: Differences across neighborhood,age, gender,and perceiver

We investigated how overtly aggressive behavior was differentially perceived by two types of perceivers, teachers and peers, as a function of student neighborhood, gender, and grade level. Participants (N= 765) were predominantly African American students in grades 3‐5 recruited from two urban public schools in southern California. The neighborhoods surrounding the two schools differed in levels of identified violent crime and economic levels. Teachers in the community experiencing more violence perceived student behavior to be relatively less aggressive and more similar across genders than did teachers in the less violent community. Peers in the community experiencing more violent crime perceived both boys and girls to be somewhat aggressive, whereas in the less violent community, boys were perceived as aggressive more so than were girls. In general, agreement between teacher and peer perceptions was stronger for boys than for girls. © 2001 John Wiley & Sons, Inc.     

Session - 3 December 19, 2007 Cardiovascular risk markers - II

Oral Cancer is one of the five leading sites of cancer in Indian population. The circulating immune complexes were investigated in 100 serum samples of 60 oral cancer patients having different grades of the disease and 40 patients with precancerous lesions obtained from Nair Hospital Dental collage, Mumbai. The results obtained were compared with those of group of 40 healthy blood donors. Elevated levels of Circulating Immune Complexes were observed in oral cancer patients and patients with oral precancerous lesions. 92% positive samples were observed in well differentiated squamous cell carcinoma whereas 100% positive samples were observed in both moderately and poorly differentiated squamous cell carcinoma. Oral leukoplakia and oral submucous fibrosis showed 15% and 90% positivity respectively. Increased level of Circulating Immune complexes in high grade tumor suggest that Circulating Immune complexes is likely to contribute in evaluating the degree of malignancy, but follow up study is needed to draw any conclusion regarding it's prognostic role     

Lived meanings: what teachers mean when they say they are learner‐centered

While the term ‘learner‐centered’ is invoked in many curriculum standards documents, packaged curriculum materials, mission statements and criticisms of educational practice, there is little agreement on its meaning. Shallow understandings and conflicting practices abound. And rarely do the meanings ascribed to the term take into account the meanings of thoughtful teachers who live learner‐centered approaches daily in their work. Here we introduce lived meanings of learner‐centeredness found in the personal and professional histories of experienced teachers. Data were gathered in interviews that took the form of focused conversations which yielded elaborated stories and reflections that suggest that learner‐centeredness is a concept that cannot be captured in finite, static, unquestioned definitions. The teachers’ lived meanings are expressed in fine‐grained detail, are embedded in particular settings and the teachers’ own personal and professional histories, go beyond surface features of practice and are in motion and unfinished. Taken together, these lived meanings have the potential to challenge and deepen current understandings of learner‐centered practices. Further, they have the potential to bring humanity, humility and integrity to the work of those who engage in these practices and of those who would support or criticize them.     

Reflection: issues related to improving professors' teaching and students' learning

We describe here the outcomes of our research on the reflection of six professors considered exemplary in their teaching. For instance, we found that they all held and used considerable knowledge about learners, as groups and as individuals, and used this knowledge in reflecting on the impact of their teaching. We use this information to elaborate on the role of reflection in the construction of teaching knowledge. Lastly, we address how the model of reflection we developed helps us understand the factors influencing one's ability to effectively reflect on teaching.     

基于二模复杂网络的隐性知识发现方法研究——以潜在药物靶点挖掘为例

[目的/意义]通过构建二模复杂网络模型,揭示隐藏在海量文献中的隐性知识.[方法/过程]通过NetworkX复杂网络工具包,依据任意两个节点的共现关系构建二模复杂网络模型;对网络模型中节点的共现关系进行加权,计算网络的拓扑信息并进行AP聚类,提取节点间的直接关系;采用AUC方法对AA、JC、加权改进的wAA和wJC等4种...