Child Labor in the Gold Coast: The Economics of Work, Education, and the Family in Late-Colonial African Childhoods, c. 1940-57

Historical knowledge of childhood in the Gold Coast (modern Ghana) is sparse and too often disconnected from a global historiography that has convincingly demonstrated the "child" to be a social construct. In contemporary discourse the "African child" is most commonly portrayed as either aspiring scholar or helpless victim—images that are echoed in the fleeting appearances of children in Africanist historiography. This essay, by contrast, explores the economic aspects of childhood in the colonial periphery and paints a more complex picture of the "African child." Children in the twentieth-century Gold Coast were vital economic actors and agents: at once producers, consumers, and accumulators of wealth. They remained so despite the political and commercial upheavals of the colonial period. Exploring the economic use and the social purpose of child labor illuminates both the material experience of children and their place in the household and wider society—and it sheds light, too, on the question of why both illiteracy and child labor are stubbornly persistent in modern Ghana

An evolutionary approach to Function

The distinction between function and role is a vexed and difficult one. While the distinction appears to be useful, in practice it is hard to apply; this can be even worse when applying this distinction to biology. In this paper, I take an evolutionary approach, considering a series of examples, to develop and generate definitions for these concepts. I test them in practice against work performed on the Ontology for Biomedical Investigations (OBI). Finally, I give an axiomatisation and discuss methods for applying these definitions in practice

An evolutionary approach to Function

Background: Understanding the distinction between function and role is vexing and difficult. While it appears to be useful, in practice this distinction is hard to apply, particularly within biology. Results: I take an evolutionary approach, considering a series of examples, to develop and generate definitions for these concepts. I test them in practice against the Ontology for Biomedical Investigations (OBI). Finally, I give an axiomatisation and discuss methods for applying these definitions in practice. Conclusions: The definitions in this paper are applicable, formalizing current practice. As such, they make a significant contribution to the use of these concepts within biomedical ontologies

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Direct analysis of hydrogen/deuterium mixtures: A concept

Fraction of deuterium/hydrogen mixture is isolated by column chromatography, ionized, and the HD+1-0 band absorption measured with conventional high-resolution infrared spectrophotometer