现售和预售集成模式下考虑消费者时间偏好的线上企业决策

针对线上企业在集成销售模式下考虑消费者具有时间敏感的决策问题,提出现售和预售集成模式下企业的价格策略和库存策略,并分析不同模式下企业的库存量和利润,最后通过仿真算例分析预售时间对企业决策参数和利润的影响。研究发现,当市场规模一定,集成模式可以有效降低企业库存;当市场规模增加,集成模式可以分担库存剩余风险。单一现售和集成模式的优劣取决于企业能否有效降低产品交付成本以及能否有效刺激市场需求。     

Mathematics Teachers Acting as Informal Assessors: Practices, Problems and Recommendations

The purpose of this paper is initially to present findings which identify components of the practices of teachers acting as assessors of students' mathematics in the normal course of classroom work. At an informal level such practice is found to be complex and intimately related to every aspect of teaching and learning. It is found that even teachers who have undergone some assessment training may underestimate the role of interpretation of evidence, and questions about equity in the uses of teachers' judgements are raised in relation to awareness and practice. It is suggested that more care needs to be taken over the formation and use of professional judgements within systems of assessment.This revised version was published online in September 2005 with corrections to the Cover Date.     

Measuring teachers’ self-efficacy beliefs: Development and use of the TEBS-Self

This paper distinguishes between teacher efficacy and teacher self-efficacy beliefs and describes a need for theory and research-based measures of teachers’ self-efficacy beliefs that are grounded in the context of the classroom. To meet this need, a new measure of teacher self-efficacy beliefs, the Teachers’ Efficacy Beliefs System-Self (TEBS-Self), is described by the authors. Principal components analysis results are presented from three independent studies performed in the United States (n=2373 K-6 teachers) using the TEBS-Self.     

Networked Learning in Higher Education: Students’ Expectations and Experiences

This paper reports findings from a study of undergraduates’ expectations about, and experiences of, networked learning using computer-mediated conferencing (CMC). The data come from questionnaires administered at the start and end of four different courses, and their interpretation is informed by a set of interviews with students and teachers involved in these and other networked learning courses. Students’ views were generally positive at the start and at the end of each course, though they became more moderate over time. The structure of students’ reported feelings remained relatively stable over time. There was no evidence to suggest that male or younger students had more positive feelings about networked learning. The thoroughness with which CMC is integrated into a networked learning course appears as a significant factor in explaining differences in students’ feelings about the worth and value of their experience. As might be expected, a well-integrated course was associated with more positive experiences.     

Relationship between teacher intentions and their classroom use of Superscience

Using the conceptual model of reasoned action, one would expect that what teachers do with instructional materials would be influenced by their internal beliefs and their external constraints. In this two-year study with elementary teachers, using a supplemental science instructional resource,Superscience, it was found that teachers' internal beliefs about what will benefit their students are linked to the external constraints of their students' interests and the expected curriculum. Even if the teachers believed that the content of the resource would be helpful, they were not likely to use it if they believed it did not fit the expected curriculum.     

Taiwan Elementary Teachers’ Views of Science Teaching Self-Efficacy and Outcome Expectations

This paper presents the results of a case study involving 282 Taiwanese elementary science teachers at the elementary level. These teachers provided responses to the science efficacy instrument (STEBI-A) and also provided personal data regarding how their years of general (YTE) and science (YTS) teaching experience may have influenced student achievement in science. Researchers used two multivariate analysis of variance (MANOVA) to investigate the interaction and influence of YTE and YTS upon the personal science teaching efficacy (PSTE) and science teaching outcome expectations (STOE) of these teachers. The results advocate the position that the years of general teaching experience of elementary science teachers in Taiwan have a significantly greater impact upon their personal science teaching efficacy and science teaching outcome expectations than years of teaching science. This evidence calls into question whether Bandura and Tschannen-Moran’s view of teacher efficacy as both context and subject matter specific at the elementary level can be applied to Taiwan elementary teachers who teach science. The results of this study should benefit educators and policy-makers with respect to future elementary teacher education throughout Taiwan and other developing nations. An erratum to this article can be found at     

Cultural dimensions of feedback at an Australian university: a study of international students with English as an additional language

International students with English as an additional language face transitional challenges when entering a new academic culture. One such challenge involves optimising feedback to help foster their academic development, bearing in mind that feedback is not a culturally neutral entity (Nazif, A., Biswas, D., &; Hilbig, R. (2004–2005). Towards an understanding of student perceptions of feedback. Carleton Papers in Applied Language Studies, 21/22, 166–192). The current study of 134 postgraduate international students examines pre-course and in-course perceptions, experiences and expectations of feedback at university in Australia. Responses to questionnaires and in focus groups revealed that students’ previous feedback experiences had largely been summative, with an emphasis on error correction, but they expected to receive more feedback, particularly formative, throughout their courses. They also had concerns about understanding feedback, and about potentially negative remarks. These concerns were partially borne out by a follow-up survey (n?=?43) in which only 29% said they understood everything their lecturers said. Teachers giving feedback to international students may, therefore, need to consider the nature of their comments, their method of delivery and how their feedback affects student development.     

博士后工作满意度及其影响因素的实证分析：基于《自然》全球博士后的调查数据

中国博士后群体在规模不断扩大的同时,亦面临着生存境遇、学术发展与自主独立等现实挑战,但学界缺乏从内部与系统角度研究其工作满意度及影响因素。为推动相关制度改革、提升博士后群体工作满意度,基于2020年《自然》的全球博士后调查数据,在满意度指数模型的理论框架下采用结构方程模型分析发现,全球样本博士后工作满意度指数得分为63.16分,处于基本满意阶段。其中,组织保障、合作导师支持和工作期望能显著正向预测博士后工作满意度,且合作导师支持的总体效应较高;工作期望不仅可以直接预测博士后工作满意度,还通过组织保障与合作导师支持两个中介变量对博士后满意度产生间接影响,而组织保障通过影响合作导师支持发挥链式中介效应;不同性别、流动方式与工作年限的博士后具有差异化的工作满意感知。由此,中国相关博士后政策制度应明确其职业地位,提升组织保障水平,加大合作导师支持力度并关注不同博士后的现实需求。     

What examiners do: what thesis students should know

Although many articles have been written about thesis assessment, none provide a comprehensive, general picture of what examiners do as they assess a thesis. To synthesise this diverse literature, we reviewed 30 articles, triangulated their conclusions and identified 11 examiner practices. Thesis examiners tend to be broadly consistent in their practices and recommendations; they expect and want a thesis to pass, but first impressions are also very important. They read with academic expectations and the expectations of a normal reader. Like any reader, thesis examiners get annoyed and distracted by presentation errors, and they want to read a work that is a coherent whole. As academic readers, examiners favour a thesis with a convincing approach that engages with the literature and the findings, but they require a thesis to be publishable research. Finally, examiners give not only a final evaluation of a thesis, but also instruction and advice to improve the thesis and further publications and research. We hope that these generalisations will demystify the often secret process of assessing a thesis, and reassure, guide and encourage students as they write their theses.     

Using expectations and satisfaction to measure the frontiers of efficiency in public universities

Students’ satisfaction with their university and course is of fundamental importance to retain students and promote their positive worth-of-mouth. The objective of this research is to analyse the level of efficiency of Portuguese public universities, according to the expectations and satisfaction of their students. To accomplish the objective, this article uses data envelopment analysis methodology. As our unit of analysis, we selected the faculties making up the universities researched. The analytical input came from the expectations of 1669 students regarding their study programme and their universities. The outputs stem from their satisfaction with their study programmes and their universities. We conclude that university practices do not currently guarantee efficiency. We also observe that efficiency in the relationship between expectations and general satisfaction with the study programme does not represent efficiency in the relationship between expectations and general satisfaction with the university, and vice versa.