解决分布式需求的内在冲突

2006年8月,GEN(I网络创新的全球化环境)项目组公布其项目的设计原则。来自普林斯顿大学、麻省理工大学、华盛顿大学等学校的十二位专家编写了这份报告。该报告阐述了GENI的研究范围、用户的需求、需求的内在压力,以及工程设计的原则。报告指出了GENI的价值主张,广泛的部署、多样化可扩展的网络技术集合、对真实用户流量的支持仍是GENI关注的原则和方向。上期已经介绍第一部分——“分布式需求定义GENI的重心”,本期刊出第二部分——“解决分布式需求的内在冲突”。     

In Defence of the Modernist Project in Education

This paper advocates the concept of critical modernity, in contradistinction to that of postmodernity, in orientating the practice of education. It draws on work in anthropology, and the writings of Giddens and Habermas, in support of a re-vivified project of modernity. It also presents ideas from on-going communication styles research that may give efficacy in education to Habermas's concept of communicative action.     

Culture wars in the classroom: Prospective teachers question science

Does studying about the nature(s) of science contribute to a prospective teachers' effectiveness as a science teacher? This research grew out of a course created by a science educator and historian of science who believed prospective teachers needed more complex understandings of the cultural wars surrounding science. The research team consisted of five prospective teachers who participated in the course as well as the two instructors. This paper describes the experience of participating in the course from both perspectives. We argue that studying the cultural wars over science contributes to prospective teachers' professional growth as much because the course elicits tacit beliefs about school science as it introduces more complex understandings of science. We found that prospective teachers' tacit beliefs about school science were their greatest barrier to developing more complex understandings about the nature(s) of science. We contend that willingness to grapple with complexity and developing a professional identity by locating oneself in the conversations about the nature(s) of science are better criteria for determining the professional growth of prospective teachers than knowledge measures. Finally, we argue that prospective teachers should be viewed as professionals who are responsible for finding their own voice, making their own decisions, and considering the consequences of their beliefs on their practice. This study raises questions critical to teacher education programs for prospective teachers and teacher‐educators alike. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 895–915, 2000     

Time-in/time-out as a response to noncompliance and inappropriate behavior with children with developmental disabilities: Two case studies

Time-in and time-out were used to treat inappropriate and noncompliant behaviors in a child with severe language disabilities and a child with a moderate mental disability and cerebral palsy. The target behaviors for Jeremy were compliance with first-time presented teacher instructions, elopement and aggression. Prior to intervention, archival baseline data for Jeremy suggested a compliance rate with teacher directives of approximately 9% and a high frequency of elopement and aggression. Following implementation of a compliance training package, compliance to teacher directives increased to 97% within the first week of intervention and minimal instances of elopement and aggression. Two, 24, and 40-week follow-up compliance checks yielded mean rates of 98%, 99%, and 98% respectively and no elopement or aggression. Reduction in object tossing behaviors was targeted for Jenny. Archival baseline, indicated through parent report, suggested tossing rates of 80% of the times objects were in hand. Frequency of object tossing behavior decreased to a near-zero level during intervention. The use of this intervention package with children in an effort to deter future chronic noncompliance and inappropriate behavior is discussed. © 1997 John Wiley & Sons, Inc.     

Scientific Modeling for Inquiring Teachers Network (SMIT’N): The Influence on Elementary Teachers’ Views of Nature of Science, Inquiry, and Modeling

This paper summarizes the findings from a K-6 professional development program that emphasized scientific inquiry and nature of science within the theme of scientific modeling. During the 2-week summer workshop and follow up school year workshops, the instruction modeled a 5-E learning cycle approach. Pre and posttesting measured teachers’ views of nature of science, inquiry, and scientific modeling. Teachers improved their views of nature of science (NOS) and inquiry by including scientific modeling in their definitions of how scientists work, the empirical nature of science, and the role of observations and inferences in science. Their definitions of science expanded from a knowledge-based orientation to a process-based orientation. Teachers added the use of mathematical formulas to their views of scientific modeling. Using scientific modeling as the central theme was effective in providing positive influence on teachers’ views of inquiry and NOS.     

Increased Implementation of Emergent Literacy Screening in Pre-Kindergarten

The recent emphasis on universal prekindergarten programs, coupled with ongoing concern about children’s’ early literacy development in the first years of school, carry significant implications for how preschool educators program for literacy and assess literacy growth. We discuss the evolving role of literacy development in expanded preschool, examine key features of literacy assessments with particular attention to the content that might be assessed in preschool, and provide as an example one preschool literacy assessment tool that is in widespread use in the United States. We discuss the policy and practice implications of the growing emphasis on literacy assessment in preschoolers.     

Establishing a practical treadmill sprint as an alternative to the Wingate anaerobic test

This study examined the validity and reliability of a 30-second running sprint test using two non-motorized treadmills compared to the established Wingate Anaerobic Test. Twenty-four participants completed three sessions in a randomized order on a: (1) manual mode treadmill (Woodway); (2) specialized interval training treadmill (HiTrainer); and (3) Wingate cycle ergometer. In a subset of 15 participants, 2 additional sessions were completed on both treadmills to establish the test–retest reliability. Peak (Woodway: r = .68; HiTrainer: r = .58; p < .003), average (Woodway: r = .82; HiTrainer: r = .72, p < .001), and minimum (Woodway: r = .64; HiTrainer: r = .42, p < .043) speed indices were moderately to very strongly correlated with corresponding Wingate Anaerobic Test outputs and had excellent test–retest reliability (all intraclass correlation coefficients > .75). Fatigue index during the Wingate Anaerobic Test (51.20 ± 7.14%) was moderately correlated with the Woodway (32.9 ± 10.9%, r = .55, p = .005) only. This 30-second running sprint test may be a valid and reliable mode-specific alternative to the Wingate Anaerobic Test.