Time dependence of rotational state populations of excited hydrogen molecules in an RF excited plasma reactor

We report on time-dependent population distributions of excited rotational states of hydrogen in a capacitively coupled RF discharge. The common model to obtain the gas temperature from the rotational distribution is not applicable at all times during the discharge cycle due to the time dependence of the EEDF. The apparent temperature within a cycle assumes values between 350 K and 450 K for the discharge parameters of this experiment. We discuss the optimum time window within the discharge cycle that yields the best approximation to the actual temperature. Erroneous results can be obtained, in principle, with time-integrated measurements; we find, however, that in the present case the systematic error amounts to only approximately 20 K. This is due to the fact that the dominant contribution to the average intensity arises during that time window for which the assumptions underlying the analysis are best fulfilled. A similar analysis can be performed for N+2 rotational bands with a small amount of nitrogen added to the discharge gas. These populations do not exhibit the time variations found in the case of H2.

Understandings of citizenship education in Northern Ireland and the Republic of Ireland: Public discourses among stakeholders in the public and private sectors

Internationally, citizenship education has come to the fore in the past decade. It may be particularly importantwithin the context of societies with a legacy of political conflict, such as Northern Ireland and the Republic of Ireland, where it is being implemented as part of the statutory curriculum. This article explores understandingsof citizenship education among stakeholders in the private and public sectors in Northern Ireland and the Republic of Ireland with the aim to compare these with curricular conceptualizations of citizenship inboth contexts. Semi-structured interviews were conducted in both societies involving non-governmentalorganizations, political parties, trade unions and the police. Results indicated that levels of awareness aboutcitizenship education varied substantially and understandings mainly reflected current theory and curriculumpractice in citizenship. Commonalities emerged as in both societies similar key concepts were identified whiledifferences transpired over issues relating to national identity and political conflict, which may raise questionsfor history and citizenship education in both societies.

Liquid and solid-state structures of 1,3-dimethylimidazolium salts

Using neutron and single crystal X-ray diffraction the structures of 1,3-dimethylimidazolim chloride and hexafluorophosphate salts have been determined in the liquid and the solid-state. The relative hydrogen bonding characteristics and sizes of the two anions force the ions to pack differently. In each case, a strong correlation between the crystal structure and liquid structure is found.

A New Concept of Interprofessional Education in Planning Programmes: Reflections on Healthy Urban Planning Project

Although widely debated, some of the defining professional characteristics of planners appear to be competencies in co-ordination, mediation and multidisciplinary working. Despite this, there is little pedagogical reflection on how interprofessional skills are promoted in planning programmes. This paper reflects on the experience of bringing together undergraduate students from medicine and planning to explore the concept of Healthy Urban Planning in a real life context of an urban motorway extension. This reveals a number of unexpected outcomes of such collaboration and points to the value of promoting interprofessional education, both as a way of increasing interest in some of the key challenges now facing society and in order to induce greater professional reflection amongst our students.