Learning to select the correct answer in multi-stream question answering

Question answering (QA) is the task of automatically answering a question posed in natural language. Currently, there exists several QA approaches, and, according to recent evaluation results, most of them are complementary. That is, different systems are relevant for different kinds of questions. Somehow, this fact indicates that a pertinent combination of various systems should allow to improve the individual results. This paper focuses on this problem, namely, the selection of the correct answer from a given set of responses corresponding to different QA systems. In particular, it proposes a supervised multi-stream approach that decides about the correctness of answers based on a set of features that describe: (i) the compatibility between question and answer types, (ii) the redundancy of answers across streams, as well as (iii) the overlap and non-overlap information between the question–answer pair and the support text. Experimental results are encouraging; evaluated over a set of 190 questions in Spanish and using answers from 17 different QA systems, our multi-stream QA approach could reach an estimated QA performance of 0.74, significantly outperforming the estimated performance from the best individual system (0.53) as well as the result from best traditional multi-stream QA approach (0.60).     

提高容量法测硅准确度的研究

分析了溶液的酸度及指示剂对测定二氧化硅准确度的影响,提出了控制溶液酸度及恰当运用指示剂的方法.可提高容量法测硅的准确度.     

Abuse and deliberate self-poisoning in women: a matched case-control study.

OBJECTIVE: Controlled studies have shown deliberate self-harm to be more common in abused populations, but no controlled studies have shown abuse to be more common in self-harming populations. This is the first controlled study to determine whether abuse experiences (sexual, physical, and psychological) occurred more commonly in women who take overdoses than in controls. METHOD: The design was a matched (1:1) case-control study set in a district general hospital in England. The subjects were 36 women admitted following deliberate self-poisoning. They were matched with the next non-overdose admission to the same hospital on six variables (sex, age, ethnicity, social class, marital status, and geographical locality). The main outcome measures used were modified versions of standardized self-report questionnaires of sexual, physical, and psychological abuse, together with measures of parenting style and general psychopathology. RESULTS: Women who had taken an overdose were more likely (odds ratio 15.0, 95% confidence interval 2.0 to 113.6) to have been sexually abused, and somewhat more likely to have been psychologically (1.02, 1.00 to 1.05) but not physically abused. They also had higher measures of psychopathology (GHQ-30: 1.19, 1.07 to 1.31), were more likely to have been abused at a younger age, exposed to the "affectionless control" style of parenting by their mothers, and to have harmed themselves in other ways. CONCLUSIONS: The management of women presenting to hospital after self-poisoning should include assessment of abuse experiences, and instigation of appropriate treatment in those with significant sequelae of abuse.     

Creating a dialogic environment for transformative science teaching practices: towards an inclusive education for science

Abstract

This paper focuses on the design and application of a teacher training strategy to promote the inclusive education of students with disabilities in the science classroom, through the creation of adult learning environments grounded on the principles of dialogic learning. Participants of the workshop proposal consisted of a group of twelve teachers who were working at various educational levels. Teacher teams proposed and implemented in their classroom, innovative, inclusive science-learning activities about a topic of their choice. Data were collected from interviews with teachers five months after the courses, teachers’ portfolios about their practice during implementation of such sequences, and researchers’ observations. The data suggest that it is possible to stimulate a gradual transformation of teaching practices through a teacher training proposal that promotes self-awareness and critical reflection, situated in the creation of meaning and a willingness to change in the spirit of solidarity and social action. We found elements to recommend the incorporation of these innovations at the curricular and practical level for teacher training schools and for in-service teacher development programmes in Mexico and elsewhere.     

Separated by Removal: The Impact of Parental Deportation on Latina/o Children’s Postsecondary Educational Goals

This research examines the impact of parental deportation on Latino/a adolescents’ postsecondary aspirations. Based on interviews with students, their families, and site observations, the study finds that for some adolescents who held college aspirations prior to the deportation, this type of abrupt parental removal negatively affects their perception of safety and stability in their home and school environments (i.e., microsystem) (Bronfenbrenner, 2005). Where this vulnerability is not countered with emotional, economic, and institutional support, it can hinder their development of the social capital (Coleman, 1988; Stanton-Salazar, 2001) that would be conducive to their higher educational aspirations.     

The Use of Concept Maps as an Assessment Tool in Physics Classes: Can One Use Concept Maps for Quantitative Evaluations?

Research in Science Education - The aim of the present research was to explore the use of concept maps as an assessment tool. The research question posed was: can concept maps be used to...     

The conscious system for the movement technique: an ontological and holistic alternative for (Spanish) physical education in troubled times

After critically analyzing some of the Spanish physical education's (PE) main justifications and pointing out their problematic effects on teachers and students, the paper proposes an alternative orientation to teaching and learning PE that fosters consciousness, centeredness and transformation. Drawing from arguments and examples taken from ‘Eastern’ martial arts, the paper introduces the Conscious System for the Movement Technique (CSMT)—a ‘Western,’ ontological, and holistic approach whose purpose is to help people find paths that may allow them to transcend present paradigms, become interpreters of themselves, and acquire knowledge about the use of their body as a totality that, essentially, is ‘the reflection of a complex and mysterious functioning.’ Following this introduction to the CSMT, the paper explains its methodological principles, process, practical applications and transformative effects.     

Team teaching with NES and NNES teachers

Language teachers are often categorised as either native or non native speakers,with some students, fee-paying parents,teachers and researchers subscribing to the idea that being a native English speaker (NES) is enough to make a teacher more valuable than a non-native English speaker(NNES).