Contents or ideology? A case study of mathematical teaching in North Korea

This article addresses mathematics education in one of the most closed countries in the world, North Korea. It is known that ideology permeates all aspects of life in North Korea, but how exactly do the ideological and substantive mathematical components interact in mathematics education there? What concrete form does this interaction take in actual everyday teaching practice? This article seeks to answer these questions based on interviews with former North Korean mathematics teachers and students who have found a refuge in South Korea. With their help, we attempt to analyze the everyday life of North Korean schools, by reconstructing their concrete features and the routines of North Korean mathematics education.     

Validity in teachers’ summative assessments

This paper describes some of the findings of a project which set out to explore and develop teachers’ understanding and practices in their summative assessments. The focus was on those summative assessments that are used on a regular basis within schools for guiding the progress of pupils and for internal accountability. The project combined both intervention and research elements. The intervention aimed both to explore how teachers might improve those practices in the light of their re‐examination of their validity, and to engage them in moderation exercises within and between schools to audit examples of students’ work and to discuss their appraisals of these examples. This paper reports findings, arising from this work, of the research that aimed to study how teachers understand validity, and how they formulate their classroom assessment practices in the light of that understanding. The paper also considers how that understanding might be challenged and developed. It was found that teachers’ attention to validity issues had been undermined by the external test regimes, but that teachers could re‐address these issues by reflection on their values and by engagement in a shared development of portfolio assessments.     

A novel on-chip three-dimensional micromachined calorimeter with fully enclosed and suspended thin-film chamber for thermal characterization of liquid samples

A microfabricated calorimeter (μ-calorimeter) with an enclosed reaction chamber is presented. The 3D micromachined reaction chamber is capable of analyzing liquid samples with volume of 200 nl. The thin film low-stress silicon nitride membrane is used to reduce thermal mass of the calorimeter and increase the sensitivity of system. The μ-calorimeter has been designed to perform DC and AC calorimetry, thermal wave analysis, and differential scanning calorimetry. The μ-calorimeter fabricated with an integrated heater and a temperature sensor on opposite sides of the reaction chamber allows to perform thermal diffusivity and specific heat measurements on liquid samples with same device. Measurement results for diffusivity and heat capacitance using time delay method and thermal wave analysis are presented.     

Fast and reliable droplet transport on single-plate electrowetting on dielectrics using nonfloating switching method

In a droplet transport based on electrowetting on dielectrics, the parallel-plate configuration is more popular than the single-plate one because the droplet transport becomes increasingly difficult without cover plate. In spite of the improved transport performance, the parallel-plate configuration often limits the access to the peripheral components, requesting the removal of the cover plate, the single-plate configuration. We investigated the fundamental features of droplet transport for the single-plate configuration. We compared the performance of several switching methods with respect to maximum speed of successive transport without failure and suggested nonfloating switching method which is inherently free from the charge-residue problem and exerts greater force on a droplet than conventional switching methods. A simple theory is provided to understand the different results for the switching methods.     

Building Citizen Trust Through E-government

The trust of citizens in their governments has gradually eroded. One response by several North American governments has been to introduce e-government or Web-mediated citizen-to-government interaction. This paper tests the extent to which online initiatives have succeeded in increasing trust and external political efficacy in voters. An Internet-based survey of 182 Canadian voters shows that using the Internet to transact with the government had a significantly positive impact on trust and external political efficacy. Interestingly, though the quality of the interaction was important, it was secondary to internal political efficacy in determining trust levels, and not significant in determining levels of external political efficacy (or perceived government responsiveness). For policymakers, this suggests e-government efforts might be better aimed at citizens with high pre-extant levels of trust rather than in developing better Web sites. For researchers, this paper introduces political efficacy as an important determinant of trust as it pertains to e-government.