Reliability of laser Doppler,near-infrared spectroscopy and Doppler ultrasound for peripheral blood flow measurements during and after exercise in the heat

This study examined the test-retest reliability of near-infrared spectroscopy (NIRS), laser Doppler flowmetry (LDF) and Doppler ultrasound to assess exercise-induced haemodynamics. Nine men completed two identical trials consisting of 25-min submaximal cycling at first ventilatory threshold followed by repeated 30-s bouts of high-intensity (90% of peak power) cycling in 32.8 ± 0.4°C and 32 ± 5% relative humidity (RH). NIRS (tissue oxygenation index [TOI] and total haemoglobin [tHb]) and LDF (perfusion units [PU]) signals were monitored continuously during exercise, and leg blood flow was assessed by Doppler ultrasound at baseline and after exercise. Cutaneous vascular conductance (CVC; PU/mean arterial pressure (MAP)) was expressed as the percentage change from baseline (%CVC_BL). Coefficients of variation (CVs) as indicators of absolute reliability were 18.7–28.4%, 20.2–33.1%, 42.5–59.8%, 7.8–12.4% and 22.2–30.3% for PU, CVC, %CVC_BL, TOI and tHb, respectively. CVs for these variables improved as exercise continued beyond 10 min. CVs for baseline and post-exercise leg blood flow were 17.8% and 10.5%, respectively. CVs for PU, tHb (r² = 0.062) and TOI (r² = 0.002) were not correlated (P > 0.05). Most variables demonstrated CVs lower than the expected changes (35%) induced by training or heat stress; however, minimum of 10 min exercise is recommended for more reliable measurements.     

应对信息技术挑战 提高教师职业素质

在教育信息化的今天,教师的角色、教师与学生的关系以及教师的观念都发生了很大变化。作为一名教师,要想适应现代信息技术的发展,使自己的信息技术水平不断得到提升,就必须把握好角色、关系和观念的转变。     

Students' insights on the use of video lectures in online classes

Video lectures (VL), considered an effective means for delivering course content and infusing teaching presence in the virtual environment, have become very popular in education. The purpose of this study was to investigate online student experiences with VL focusing on their opinion of usefulness of VL, their satisfaction with them and their perception of learning derived from them. Our findings show that students' satisfaction with VL has a strong relationship with positive overall learning experience and perception of impact of video on learning. Furthermore, VL can enhance a feeling of engagement with content because of learners' control of the media and instructors' presence. The findings also alert us on the importance of careful planning and balanced integration of VL with other course materials. This provides important information on the effectiveness of video-lectures in college teaching and learning and implications for practice in online course design.     

Information culture and organizational effectiveness

This paper develops a typology of information cultures by synthesizing empirical and theoretical research in organization science and information science. Four information culture types are proposed. In a Result-oriented culture, the goal of information management is to enable the organization to compete and succeed in its market or sector. In a Rule-following culture, information is managed to control internal operations, and to reinforce rules and policies. In a Relationship-based culture, information is managed to encourage communication, participation, and a sense of identity. In a Risk-taking culture, information is managed to encourage innovation, creativity, and the exploration of new ideas. We expect most organizations to display to varying degrees norms and behaviors from all four types, and that the information culture profile of an organization would be related to its effectiveness. The paper ends by looking at the practical and theoretical value of a systematic examination of information culture and its link to organizational effectiveness.     

Knowledge management support for teachers

Business organizations worldwide are implementing techniques and technologies to better manage their knowledge. Their objective is to improve the quality of the contributions people make to their organizations by helping them to make sense of the context within which the organization exists; to take responsibility, cooperate, and share what they know and learn; and to effectively challenge, negotiate, and learn from others. We consider how the concepts, tools, and techniques of organizational knowledge management can be applied to the professional practices and development of teachers. We describe a framework for knowledge management support for teachers where the sharing of concrete knowledge scaffolds the attainment of more abstract levels of knowledge sharing. We describe the development of a knowledge management support system emphasizing long-term participatory design relationships between technologists and teachers, regional cooperation among teachers in adjacent school divisions, the integration of communication and practice, synchronous and asynchronous interactions, and multiple metaphors for organizing knowledge resources and activities. This work was supported by the National Science Foundation, REC-0106552.     

The cosmopolitan turn in Literature education and its resulting tensions in Singapore schools

ABSTRACT

In this article, I highlight the emergence of a cosmopolitan turn in Literature education as observed in teachers’ beliefs and practices in Singapore schools. Central to the cosmopolitan turn is the view that Literature education should not be disengaged from real-world connections to others particularly those who are marginalized and oppressed in the world. In the first part of this article, I describe core principles informing a cosmopolitan approach to teaching Literature that is distinct from previous movements. In the second part, I utilize case studies of Literature teachers from four secondary schools in Singapore to discuss key tensions resulting from teachers’ attempts to foster cosmopolitan sensitivities. These tensions point to the propensity for Literature education to prioritize a form of universalism that neglects the dynamic interconnections between national and global identity; to encourage a human capital approach to education where cosmopolitanism is co-opted to strategically benefit elites and to perpetuate passive rather than active cosmopolitan engagement with justice. I suggest that awareness of these tensions can enable educators to develop more holistic and ethically grounded cosmopolitan Literature education where all students can be equipped with critical and empathetic capacities to navigate diverse and conflicting values in our global age.     

Secondary school students’ discourse synthesis performance on Chinese (L1) and English (L2) integrated writing assessments

Reading and Writing - This study investigates the relationship between three discourse synthesis skills (i.e., quotation, summarization, and connection) and students’ overall integrated...     

Global education and its tensions: case studies of two schools in Singapore and the United States

Abstract

Countering the drive to erect walls between nations and communities, the burden is increasingly on educators to develop in students essential skills and dispositions for a more hospitable future. Global education is essentially aimed at addressing the realities of increasingly networked societies and porous exchanges of knowledge, capital, and products among people and groups around the world. This paper examines how global education is enacted in two schools in Singapore and the United States. Given that a central characteristic of the twenty-first century is globalization, global education is inevitably embedded in the discourse of twenty-first century competencies utilized by policymakers worldwide. However, while global education has typically been studied as a singular subject such as Human Rights or integrated into History, Social Studies, or Civics Education, this study differs as it examines two schools that have adopted a whole-school approach to global education. That is, global education is embedded in the culture of schooling and infused across curricula subjects. The first part of the paper provides an overview of global education and its two key emphases – globalism and global citizenship. The second part discusses the tensions emerging from observations of global education in the two schools.