This paper begins with an early measurement of the speed of sound in water. A historical overview of the consequent development of SONAR and medical imaging is given. A method of measuring the speed suitable for demonstration to year 10 students is described in detail, and an explanation of its systematic error examined.

Fluorescence and phosphorescence are two forms of photoluminescence used in modern research and in practical applications. The early observations of these phenomena, before the emergence of quantum theory, highlight the investigation into the mechanism of light emission. In contrast to incandescence, photoluminescence does not require high…

The Egyptians were known in the ancient world as experts in many applied chemistry fields such as metallurgy, wine and beer making, glass making, paper manufacture, paint pigments, dyes, cosmetics, perfumes, and pharmaceuticals. They made significant developments in the extraction of metals from their ores, especially copper and gold. The…

This paper reports a predominantly qualitative classroom study on cooperative learning about nature of science (NOS) using a case from the history of science. The purpose of the research was to gain insight into how students worked with the historical case study during cooperative group work, how students and teachers assessed the teaching unit,…

The 1998 Nuffield Foundation report "Beyond 2000: Science Education for the Future," by Robin Millar and Jonathan Osborne, produced ten recommendations and had a major effect on curriculum development in England, Wales and Northern Ireland. Twenty years after its publication, I pose ten questions for science education. The hope is that…

Assuming that textbooks give literary expression to cultural and ideological values of a nation or group, we propose the analysis of chemistry textbooks used in Brazilian universities throughout the twentieth century. We analyzed iconographic and textual aspects of 31 textbooks which had significant diffusion in the context of Brazilian…

The literature on the pedagogical aspects of the photoelectric effect as used in the undergraduate student laboratory shows that little research has been done in this area. Our current study is an analysis of the instructions in 38, electronically published laboratory manuals for the photoelectric effect. The analyses were based on history and…

The 4 years that Michel Hersen spent at the University of Mississippi Medical Center (1970-1974) are described in this article from the viewpoint of his place in the history of the development of behavior analysis and therapy. The Department of Psychiatry at the University of Mississippi Medical Center became a leader in enhancing the role of…

It is difficult for students to understand historical settings, connect to today's world, interpret and appreciate scientists' efforts within current perspectives. Empathizing with historical characters and events can mediate understanding nature of physics for students. The purpose of this study was to investigate the effect of history of science…

This article traces the influences of hypertext theory throughout the various genres of online publication in technical communication. It begins with a look back at some of the important concepts and theorists writing about hypertext theory from the post-World War II era, to the early years of the World Wide Web 2.0, and the very differing notions…

The nineteenth-century Anglican Priest Charles Kingsley (1819-1875) was a significant populariser of Darwin's theory of evolution by natural selection. Kingsley was successful in this regard because he developed such diverse connections throughout his career. In the 1840s he associated with Chartists and radical journalists; in the 1850s and 1860s…

Social work authors in the 1950s claimed progressivism as a unique social work "tradition" and set of values, and this historical interpretation has influenced many versions of social work history since that time. Today, other voices in the profession claim various divergent traditions for social work and note that the progressive tradition has…

The discovery of the electron in 1897 deeply impacted the nature of chemistry in the twentieth century. A revolution in the theoretical structure of chemistry as well as in the instrumental tools used in chemical analysis occurred as a result of this discovery. The impact of this revolution on tin oxide chemistry over approximately a 100 year…

The author has attended and presented at most ASCUE meetings since 1994, and has worked professionally in research and development, industry, military, government, business, and private and public academia--moving between computer science, software engineering, and business fields at both the undergraduate and graduate level, and even running…

Life stress is a central construct in many models of human health and disease. The present article reviews research on stress and health, with a focus on (a) how life stress has been conceptualized and measured over time, (b) recent evidence linking stress and disease, and (c) mechanisms that might underlie these effects. Emerging from this body…