Product development, especially in aerospace, has become more and more interconnected with its operational environment. In a constant changing world, the operational environment will be subjected to changes during the life cycle of the product. The operational environment will be affected by not only technical and non-technical perturbations, but also economical, managerial and regulatory decisions, thus requiring a more global product development approach. One way to try tackling such complex and intertwined problem advocates studying the envisioned product or system in the context of system of systems (SoS) engineering. SoSs are all around us, probably in any field of engineering, ranging from integrated transport systems, public infrastructure systems to modern homes equipped with sensors and smart appliances; from cities filling with autonomous vehicle to defence systems.

Since also aerospace systems are certainly affected, this work will present a holistic approach to aerospace product development that tries spanning from needs to technology assessment. The proposed approach will be presented and analysed and key enablers and future research directions will be highlighted from an interdisciplinary point of view. Consideration of the surrounding world will require to look beyond classical engineering disciplines.

Never before the nineteenth century had Europeans, especially in the south, adopted cordons sanitaires in such great numbers or at such a fast rate. This article aims to analyse the process of the rationalisation and militarisation of the cordons sanitaires imposed in the fight against epidemics during the nineteenth century on the Mediterranean island of Majorca (Spain). These cordons should be understood as a declaration of war by the authorities on emerging epidemics. Epidemics could generate sudden and intolerably high rises in mortality that the new liberal citizenship found unacceptable. Toleration of this type of measure was the result of a general consensus, with hardly any opposition, which not only obtained the support of scientists (especially in the field of medicine) but also of most of the local and provincial political elite, and even of the population at large.

This paper offers a critique of the argument that the category of ‘work’ is no longer useful in theories of society and suggests that sociology needs to be able to explain why work is not in fact being decommodified, and why the new middle classes appear unable to offer substantive challenge to alienated work and the instrumentalism of modern societies. The central focus of the paper is an examination of the extent to which public service work is subject to processes of rationalisation and degradation. Qualitative data, on the restructuring of local government, illustrates the argument. Senior officers' responses to the double-edged requirement of justifying and implementing reforms, according to a cost-quality rhetoric, are explored. The paper asks to what extent the trust relationship, embodied in the service class contract, is eroded by market principles. It suggests that divisions are emerging within the public service class between the entrepreneurial ‘strategists’ and the welfare professionals. It assesses the extent to which public servants continue to engage critically with processes of rationalisation and suggests that conservatism and defensiveness may be the predominant responses, particularly if expectations raised by devolution and democratic renewal are confounded by intensification and insecurity. In conclusion it contends that ongoing rationalisation and state policies to ‘remoralise work’ suggest that Offe (1985) and others such as Beck (1999) are over-optimistic in forecasting the demise of ‘wage slavery’.

Insect pest problems on cowpeas can be reduced by use of strategies which involve ecological manipulations. These include crop diversification (mixed cropping, etc.), alteration of planting dates, crop rotation, trap-cropping and weed control. The merits of these cultural methods of pest control are discussed.

The status of biological control of cowpea pests is still low but promising. The crop is an annual and therefore offers very limited possibilities for the application of the classical biological control techniques. However, a large number of parasitic Hymenoptera, Diptera and predatory Hemiptera, notably Reduviids have been identified in the cowpea ecosystem. Ecological studies of some of these have been carried out and levels of parasitism determined in a few cases, but their significance in the dynamics of cowpea pest populations have not been fully established.

It is however known that conservation of parasites and predators in their wild environment is one of the traditional biological control methods. Therefore, a rationalized pesticide programme for the control of cowpea pests should aim at preventing hazards to their natural enemies so as to increase their biocontrol efficiency.