Bethe-Salpeter studies of mesons beyond rainbow-ladder

We investigate the masses of light mesons from a coupled system of Dyson-Schwinger and Bethe-Salpeter equations. The dominant non-Abelian and sub-leading Abelian contributions to the dressed quark-gluon vertex are explicitly taken into account. We also include unquenching effects in the form of hadronic resonance contributions via the back-reaction of pions. We construct the corresponding Bethe--Salpeter kernel that satisfies the axial-vector Ward-Takahashi identity. Our numerical treatment fully includes all momentum dependencies with all equations solved completely in the complex plane. This approach goes well beyond the rainbow-ladder approximation and permits us to investigate the relative impact of different corrections beyond rainbow-ladder on the properties of mesons. We find that sub-leading Abelian corrections are further suppressed dynamically, and that our results supersede early qualitative predictions with significantly simpler truncation schemes.Comment: 12 pages, 8 figures, 3 tables. Contributed to the 19th International IUPAP Conference on Few-Body Problems in Physics, Bonn, Germany, August 31 - September 5, 200

Sharing the power : knowledge management, empowerment, employee self service and the NZDF : a thesis presented in partial fulfilment of the requirements for the degree of Master of Information Systems at Massey University

This thesis investigated employee views of the Defence Kiosk System (DKS) through a questionnaire, and compared the results with two empowerment methodologies. These methodologies were Spreitzer and Quinn's Five Disciplines For Empowerment, and Horibe's Employee Decision Making methodology. The DKS is the Employee Self Service (ESS) system of the New Zealand Defence Force (NZDF). The DKS is a web-based system that employees can use to access their personal records, thereby empowering employees to access their own personnel information and removing the need for them to ask human resources related questions of their administration unit. This provides the NZDF with administrative savings and accurate up to date information that can be used for Knowledge Management (KM). The research begins with a literature review. The literature review established links between Empowerment, KM and ESS. It found that for ESS systems to provide benefits employees must be willing to use them. A questionnaire was developed and sent to a sample of 1000 NZDF employees who had access to the DKS. The response was 350 completed and returned questionnaires, which exceeded the 180 responses required to enable the results to be generalised for the entire NZDF population. Analysis of the questionnaire responses showed that employees believe that the DKS, as an ESS system, meets their personnel information needs and that they were willing to use the DKS. When the results of the survey were compared with the empowerment methodologies the research supported Spreitzer and Quinn's five disciplines model, particularly the fourth and fifth disciplines. The results raised questions about the suitability of using Horibe's employee decision making methodology in the field of personnel management, especially with the advent of employee self sefvice systems

Review of Statistics with Stata (Updated for Version 8) by Hamilton

The new book by Hamilton (2004) is reviewed.introductory, teaching

Two steps forward, one step back: Achievements and limitations of university-community partnerships in addressing neighbourhood socioeconomic disadvantage

This article discusses a partnership initiative that involved a major Australian research university (University of Melbourne), a local government and a network of local community service organisations. The partnership projects aimed to promote public access to university infrastructure for poor and marginalised residents, enhance the local value of research and teaching activities, and create employment opportunities. The article draws on an evaluation of the partnership, which focused on four keynote projects. It found that the partnership appeared to achieve positive outcomes for residents but was limited by tensions associated with the university’s ambivalent commitment to the value of such partnerships. These tensions remained difficult to resolve because they signalled present contestation over the foundational values of contemporary public universities.Keywords: university-community partnerships, neoliberalism, neighbourhoods, community developmen

Deriving rhetorical complexity data from the RST-DT Corpus

This paper describes a study of the levels at which different rhetorical relations occur in rhetorical structure trees. In a previous empirical study (Williams and Reiter, 2003) of the RST-DT (Rhetorical Structure Theory Discourse Treebank) Corpus (Carlson et al., 2003), we noticed that certain rhetorical relations tended to occur more frequently at higher levels in a rhetorical structure tree, whereas others seemed to occur more often at lower levels. The present study takes a closer look at the data, partly to test this observation, and partly to investigate related issues such as the relative complexity of satellite and nucleus for each type of relation. One practical application of this investigation would be to guide discourse planning in Natural Language Generation (NLG), so that it reflects more accurately the structures found in documents written by human authors. We present our preliminary findings and discuss their relevance for discourse planning

Grouping axioms for more coherent ontology descriptions

Ontologies and datasets for the Semantic Web are encoded in OWL formalisms that are not easily comprehended by people. To make ontologies accessible to human domain experts, several research groups have developed ontology verbalisers using Natural Language Generation. In practice ontologies are usually composed of simple axioms, so that realising them separately is relatively easy; there remains however the problem of producing texts that are coherent and efficient. We describe in this paper some methods for producing sentences that aggregate over sets of axioms that share the same logical structure. Because these methods are based on logical structure rather than domain-specific concepts or language-specific syntax, they are generic both as regards domain and language