Pre-university Chemistry Students in a Mimicked Scholarly Peer Review

Peer review is a significant component in scientific research. Introducing peer review into inquiry processes may be regarded as an aim to develop student understanding regarding quality in inquiries. This study examines student understanding in inquiry peer reviews among pre-university chemistry students, aged 16–17, when they enact a design of a mimicked scholarly peer review. This design is based on a model of a human activity system. Twenty-five different schools in Brazil, Germany, Poland and The Netherlands participated. The students (n?=?880) conducted in small groups (n?=?428) open inquiries on fermentation. All groups prepared an inquiry report for peer review. These reports were published on a website. Groups were randomly paired in an internet symposium, where they posted review comments to their peers. These responses were qualitatively analyzed on small groups’ level of understanding regarding seven categories: inquiry question, hypothesis, management of control variables, accurate measurement, presenting results, reliability of results, discussion and conclusion. The mimicked scholarly review prompted a collective practice. Student understanding was significantly well on presenting results, discussion and conclusion, and significantly less on inquiry question and reliability of results. An enacted design, based on a model of a human activity system, created student understanding of quality in inquiries as well as an insight in a peer-reviewing practice. To what extent this model can be applied in a broader context of design research in science education needs further study.     

Variation in Effectiveness Between Private and Public Schools: The Impact of School and Family Networks*

Abstract

Building upon the assumption that cohesion between different levels of the school is essential to the schools’ effectiveness, the hypothesis is tested that a close kinship between school and parental community causes a positive effect on student outcomes in primary schools. Recent theories regarding the effects of ‘functional communities’ on academic achievement mainly focus on the characteristics of the parental community that surrounds a school. Recognizing, however, that schools differ regarding their responsiveness to the role of parents and other actors around the school, our expectation is that a definition of functional community which comprises interactions between characteristics of the parental network around the school and the governance structure of the school offers a better explanation of variation in student achievement. Based on a national sample of 90 schools for primary education in the Netherlands, our analysis shows that the differences in math achievement for public and private primary schools are mediated by characteristics at both the family and the institutional level. It also indicates that characteristics at the institutional level are conditional for the effects of parental networks around schools.

     

Impact of accreditation on improvement of operational inputs after two cycles of assessments in some Ghanaian universities

The study assesses the influence of accreditation, after two cycles of evaluation on some selected Ghanaian universities. This was done by examining the changes that had occurred in specified indicators, mainly because of the implementation of suggestions for improvement made by the previous cycle’s evaluators. The study employed quantitative research methods in analysing the changes (for better or for worse) that had occurred in the selected indicators from one cycle of assessments to the other and as observed in the reports of the evaluators. The results showed varying degrees of improvements in the selected indicators at the subsequent assessments over the previous ones.     

空间均匀低温氢气燃烧器开发（英文）

目的:设计制造低温的催化氢气燃烧器,并对其进行相关功能性测试。创新点:成功设计并制造出一个集成流量分配器的催化低温氢气燃烧器。方法:1.基于树状分叉方法,设计燃烧器的流量分配器,均匀分配气体到催化表面,并利用熔融沉积成型技术制备原型样机。2.基于测试结果,利用选择性激光熔化技术对燃烧器进行最优化设计。3.对设计的催化燃烧器的相关功能进行验证。结论:1.设计的低温催化燃烧器与传统的非催化燃烧器相比具有很多优势,尤其是实现了无焰均匀低温(约200°C)的产热;这一技术有望运用于化工领域的增材制造。2.本文不但用选择性激光熔融技术制备了最终产品,而且利用了熔融沉积成型技术进行快速的样机制备。3.催化剂多孔载体的调控和催化剂的负载方式研究有望进一步提升燃烧器的综合性能。     

Development of a spatially uniform low-temperature hydrogen combustor

Examples of the use of additive manufacturing and rapid prototyping in a range of applications are of great interest in order to emphasize their role in development and production technology. In this study, a catalytic low temperature burner for H₂ on a lab scale with an integrated flow distributor was designed, manufactured, and tested for functionality. Based on a theoretical approach, a flow distributor for the burner was designed and a prototype was built using fused deposition modeling (FDM). Based on test results, an optimized version of the burner was then designed and manufactured using selective laser melting (SLM). The functionality of the designed catalytic burner was proven. Several advantages were found in comparison to conventional non-catalytic burners. In particular, flameless uniform low temperature heat generation with temperatures of about 200 °C could be realized. This contribution highlights the potential of additive manufacturing in chemical engineering. Not only was the final product built using SLM, but also during the development process, FDM was used for rapid prototyping.     

Contextual Influences on School Effectiveness: The Role of School Boards

The purpose of this research project is to investigate if characteristics of school boards and their administrative control do explain variance among schools in pupil achievement in the cognitive domain. A combination of findings of research on school effectiveness and organizational effectiveness, gives the ground for the framework of school boards’ administrative control used in this study. A random sample of 133 school boards and one specific primary school, selected out of the total number of schools they oversee, was drawn. The findings show that characteristics of school boards do explain variance in cognitive achievement. Even after controlling for student background and school characteristics, school boards do make a difference. School boards that involve school team and parents (committee) in their decision‐making process manage schools with relatively better results in the cognitive domain.