The Role of Carbon Dioxide in Host-Finding by Mosquitoes (Diptera: Culicidae): A Review

\ud From a critical review of the literature, it is concluded that the role of carbon dioxide in host-seeking by mosquitoes comprises two distinct actions. Firstly, it acts as an attractant’, orientation towards the host being mediated by kinesis and optomotor anemotaxis. When tested in the absence of moving air currents, orientation to the source is not possible and only the kinetic or activating effect is manifested. Moreover, in the absence of other host factors, sustained flight takes place only in response to intermittent pulses of carbon dioxide; this response is not elicited in uniformly permeated airstreams. Secondly, carbon dioxide has a combined action with warm moist convection currents\u

An action-related theory of causality

The paper begins with a discussion of Russell?s view that the notion of cause is unnecessary for science, and can therefore be eliminated. It is argued that this is true for theoretical physics, but untrue for medicine where the notion of cause plays a central role. Medical theories are closely connected with practical action (attempts to cure and prevent disease), whereas theoretical physics is more remote from applications. This suggests the view that causal laws are appropriate in a context where there is a close connection to action. This leads to a development of an action-related theory of causality which is similar to the agency theory of Menzies and Price, but differs from it in a number of respects, one of which is the following. Menzies and Price connect ?A causes B? with an action to produce B by instantiating A, but, particularly in the case of medicine, the law can also be linked to the action of trying to avoid B by ensuring that A is not instantiated. The action-related theory has in common with agency theory of Menzies and Price, the ability to explain causal asymmetry in a simple fashion, but the introduction of avoidance actions together with some ideas taken form Russell enable some of the objections to agency accounts of causality to be met. The paper begins with a discussion of Russell?s view that the notion of cause is unnecessary for science, and can therefore be eliminated. It is argued that this is true for theoretical physics, but untrue for medicine where the notion of cause plays a central role. Medical theories are closely connected with practical action (attempts to cure and prevent disease), whereas theoretical physics is more remote from applications. This suggests the view that causal laws are appropriate in a context where there is a close connection to action. This leads to a development of an action-related theory of causality which is similar to the agency theory of Menzies and Price, but differs from it in a number of respects, one of which is the following. Menzies and Price connect ?A causes B? with an action to produce B by instantiating A, but, particularly in the case of medicine, the law can also be linked to the action of trying to avoid B by ensuring that A is not instantiated. The action-related theory has in common with agency theory of Menzies and Price, the ability to explain causal asymmetry in a simple fashion, but the introduction of avoidance actions together with some ideas taken form Russell enable some of the objections to agency accounts of causality to be met

Probability and uncertainty in Keynes's The General Theory

Book description: John Maynard Keynes is undoubtedly the most influential Western economist of the twentieth century. His emphasis on the nature and role of uncertainty in economic thought is a dominant theme in his writings. This book brings together a wide array of experts on Keynes' thought such as Gay Tulip Meeks, Sheila Dow and John Davis who discuss, analyse and criticise such themes as Keynesian probability and uncertainty, the foundations of Keynes' economics and the relationship between Keynes' earlier and later thought. The Philosophy of Keynes' Economics is a readable and comprehensive book that will interest students and academics interested in the man and his thought

Mapping Current and Potential Sources of Routine Data Capture on New Psychoactive Substances in Scotland

The paper maps the data currently being captured on NPS, and provides a starting point for exploring the strengths and weaknesses of a number of existing data systems in Scotland, and opportunities for data sharing

Educational potential, underachievement, and cultural pluralism

The term 'underachievement' is widespread in modern educational discourse, invoked most frequently in relation to a perceived failure to reach 'potential'. In this paper, it is suggested that such terms, though widely used, are highly problematic, masking ideological assumptions which concern socially constructed, culturally sensitive, subjective, and relative matters. In fact, underachievement is most often used to mean low academic attainment and the paper argues that this is already better understood in terms of well-known factors such as prior attainment, socioeconomic disadvantage, and systemic biases. This paper also suggests that there is a danger of pathologising the low attainer when in fact it may be the system which is failing the learner. Further, the paper argues that the monologic focus on individual academic attainment as the sole measure of 'achievement' fails to take account of alternative cultural values and risks the charge of cultural imperialism

Lessons from the history and philosophy of science regarding the Research Assessment Exercise

The Research Assessment Exercise (henceforth abbreviated to RAE) was introduced in 1986 by Thatcher, and was continued by Blair. So it has now been running for 21 years. During this time, the rules governing the RAE have changed considerably, and the interval between successive RAEs has also varied. These changes are not of great importance as far as the argument of this paper is concerned. We will concentrate on the main features of the RAE which can be summarised as follows