Collisions Strengths and Effective Collision Strengths for transitions within the ground state configuration of S III

We have carried out a 29-state R-matrix calculation in order to calculate collision strengths and effective collision strengths for the electron impact excitation of S III. The recently developed parallel RMATRX II suite of codes have been used, which perform the calculation in intermediate coupling. Collision strengths have been generated over an electron energy range of 0-12 Ryd, and effective collision strength data have been calculated from these at electron temperatures in the range 1000-100,000 K. Results are here presented for the fine-structure transitions between the ground-state configurations of 3s(2)3p(2) P-3(0,1,2), D-1(2), and S-1(0), and the values given resolve a discrepancy between two previous R-matrix calculations.

A quorum-quenching approach to investigate the conservation of quorum-sensing-regulated functions within the Burkholderia cepacia complex

Taxonomic studies of the past few years have shown that the Burkholderia cepacia complex, a heterogeneous group of B. cepacia-like organisms, consists of at least nine species. B. cepacia complex strains are ubiquitously distributed in nature and have been used for biocontrol, bioremediation, and plant growth promotion purposes. At the same time, B. cepacia complex strains have emerged as important opportunistic pathogens of humans, particularly those with cystic fibrosis. All B. cepacia complex species investigated thus far use quorum-sensing (QS) systems that rely on N-acylhomoserine lactone (AHL) signal molecules to express certain functions, including the production of extracellular proteases, swarming motility, biofilm formation, and pathogenicity, in a population-density-dependent manner. In this study we constructed a broad-host-range plasmid that allowed the heterologous expression of the Bacillus sp. strain 240B1 AiiA lactonase, which hydrolyzes the lactone ring of various AHL signal molecules, in all described B. cepacia complex species. We show that expression of AiiA abolished or greatly reduced the accumulation of AHL molecules in the culture supernatants of all tested B. cepacia complex strains. Phenotypic characterization of wild-type and transgenic strains revealed that protease production, swarming motility, biofilm formation, and Caenorhabditis elegans killing efficiency was regulated by AHL in the large majority of strains investigated.

Transforming Researchers into Educators: Some Reflections on the University College Dublin School of Law Syllabus Design Workshop 2010

The priority given to the development of research skills during doctrinal legal education often neglects the importance of equipping PhD students with the pedagogical skills necessary to fulfill their important educational role as academics. Thus, in many instances there is a significant gap in the requisite skill base that PhD students acquire when they complete their doctrinal education. This paper outlines a first step that has been taken to address this deficiency in postgraduate legal education in Ireland. The PhD community of the University College Dublin (UCD) School of Law convened an internal Syllabus Design Workshop in April 2010 in order to provide doctrinal students with an opportunity to design a university module and to explore the issues which arise in undertaking such an exercise. The first part of this paper outlines how the workshop was conceived and convened, and provides an account of the considerations that each student had to take into account in the design of a syllabus. From here, we address the content of the workshop and reflect upon some of the important issues which were
raised. Finally, we offer a number of recommendations in relation to the development of doctrinal students as future educators. By highlighting the importance of uniting research and teaching, it is hoped that this paper will contribute to postgraduate legal education in Ireland,and also internationally.