龙虾怎样奏“乐”

自然界的动物在遭遇危险的时候,有各种各样的御敌招数,如毒蛇喷射毒液,章鱼喷出墨汁,电鳗放电,壁虎断尾求生等,还有的动物变换身形、虚张声势以吓唬敌人,而龙虾的防卫术则尤其别具一格。     

Multimedia tools for use in materials handling classes

Materials handling is a vital function in a manufacturing or distribution system. Efficient handling of material allows such systems to operate at high levels of productivity. US companies invest over US$60 billion annually in materials handling technology. It is therefore extremely important for universities to prepare materials handling engineers who understand the principles of materials handling, as well as the design, implementation, operation and control of materials handling systems so that they can ensure the cost-effectiveness of this investment. This paper pertains to development of an interactive, multimedia-based system for use in materials handling classes. Modules in the system introduce students to: the 10 principles of materials handling; and two major equipment categories—conveyors and automated storage and retrieval systems. They illustrate industrial applications of material handling equipment and teach the problem-solving process through a case study and an extensive series of models, algorithms, problems and solutions. The modules have been formally evaluated and results are summarized. They are being distributed at a nominal cost to US and international universities. The module described in this paper on the ‘10 principles of materials handling’ was selected as a finalist for the 2002 PREMIER Award for Excellence in Engineering Education Courseware.     

The Vertex Project: Children Creating and Populating 3D Virtual Worlds

This paper outlines early investigations and initial outcomes of The Vertex Project, a school‐based action research project currently underway at Middlesex University. The project aims to explore the potential of Shared 3D Virtual Environments as creative learning tools for children, and looks into the challenges facing their practical integration into the primary classroom. Working in partnership with three primary schools, the project sets out to investigate the teaching and learning possibilities offered by Internet based 3D virtual environments, placing particular emphasis on the opportunities provided by the active participation of children in the design and construction of their own virtual worlds, and in the creation of avatars with which to represent themselves within these spaces.     

Use of rich-media resources by engineering undergraduates

The ability to develop and distribute digital teaching resources in higher education has developed rapidly over the last decade but research into how students use such resources has received limited attention. This study uses questionnaire results, Internet analytic data and semi-structured interviews to examine the use of three types of rich-media teaching resources – lecture podcasts, key-concept videos and tutorial solution videos – by engineering undergraduates. It is found that students value all three types of resource, especially for revision and as a supplement to lectures. Students find short, focused resources more useful than longer ones. Non-native English speakers and those with disabilities derive particular benefits from the resources. The effect of rich-media resources on lecture attendance is found to be small, and two-way.     

In‐Place and In‐Time

This article presents parallel and collaborative research and teaching practices that expand approaches to encountering site through the lenses of observation and performative drawing. These drawing practices record phenomena, whilst in their presence, through a designed temporal framework. This asks the drawer to observe over a duration of time and to record the world in motion. By spending an extended period of time in the presence of the phenomenon of our study, with active receptivity, our capacity to see shifts. Rather than the drawn outcomes of this observation recording a past time, the notion of experiential time – and an expanded present – is embedded in the act of drawing. These processes of observation and performative drawing allude to Edmund Husserl’s expression of a ‘thickened present’. The outcomes of this drawing practice demonstrate that observational techniques are embodied, relational, temporal and generative and so offer an alternative approach to site analysis. How this approach sits within the larger domain of spatial temporal relationships and forms of drawing are also considered.     

Auditing for Score Inflation Using Self-Monitoring Assessments: Findings From Three Pilot Studies

Test-based accountability often produces score inflation. Most studies have evaluated inflation by comparing trends on a high-stakes test and a lower stakes audit test. However, Koretz and Beguin (2010) noted weaknesses of audit tests and suggested self-monitoring assessments (SMAs), which incorporate audit items into high-stakes tests. This article reports the first three trials of SMAs, evaluating whether SMAs can detect inflation that had already been documented. The studies were conducted with mathematics tests in three grades. Despite severe conservative biases, the audit component functioned as expected in many of the trials. The difference in performance between nonaudit and audit items was associated with factors that earlier research showed to be related to test preparation and score inflation, such as scoring just below the Proficient cut in the previous year and school poverty. However, a number of null findings underscore the need for additional research into the design of audit items.     

A Dual Inheritance: The Politics of Educational Reform and PhDs in Art and Design

This paper examines the changing relationship of art practice to academic research in higher education since 1960. Whereas art practice was often conceived of as divorced from any notion of academic or theoretical work in the post 1960 art school, by the 1990s the ground had changed to such a degree that it was possible to pursue doctoral study in art practice. This emergence of practice‐based PhDs can be considered as part of a larger shift in art education and its acceptance of theory.     

Rhymes and phonemes in the common unit task: replications and implications for beginning reading

Theorists and practitioners in the field of reading development are currently debating the importance of rhymes and phonemes in beginning reading. In a recent study, Duncan, Seymour and Hill (1997) provided evidence that explicit or meta- awareness of sound is closely linked to reading strategy. Meta-awareness was measured by asking beginning readers to identify the ‘common unit’ shared by two spoken words. Results showed that meta-awareness of phonemes emerged prior to meta-awareness of rhyme, and that reading strategy followed a similar small-to-large progression. This study reports on a replication of the ‘common unit’ task which includes modifications to the original procedure (randomisation of conditions, increased practice, removal of positional references from instructions). The results confirm the pattern observed in the original study. Beginning readers learning by a mixed method can identify shared phonemes but not shared rimes in the common unit task. The implications of this and similar replications are discussed.     

‘What drives students’ affective commitment towards their university?’

How can universities build ongoing, committed relationships with students, able to withstand the financial and emotional challenges of studying in higher education? The research proposes that students’ ongoing attachment to their university, based on positive feelings towards the university, is an important aspect of the student experience. This ongoing attachment is conceptualised here as students’ affective commitment towards their institution. Using an online survey-method and a research sample comprising undergraduate students studying in the UK, this research identifies three factors which drive students’ affective commitment towards their institution. These factors include students’ affective commitment towards academics and students’ calculative commitment towards the institution; factors which draw from the relational literature. A third factor, commitment balance, was developed within this research. Commitment balance occurs when a student’s commitment to their university is perceived to be reciprocated by the university’s commitment to the student. The study found that commitment balance was the most important driver of students’ ongoing attachment to their institution. The paper proposes that commitment balance is a key idea to consider within relational studies generally, but has a particular relevance in the higher education context for understanding the student experience. Commitment balance reflects the pulse of reciprocity which energises relational exchanges between students and institution. The findings of this research reinforce how critically important it is for universities and academics to build relationships with students. The desired outcome is to enhance the student experience, create positive attachment between students and university and ultimately improve student retention.