BV-Structure of the Cohomology of Nilpotent Subalgebras and the Geometry of (W-) Strings

Given a simple, simply laced, complex Lie algebra \bfg corresponding to the Lie group $G$, let \bfnp be the subalgebra generated by the positive roots. In this paper we construct a BV-algebra \fA[\bfg] whose underlying graded commutative algebra is given by the cohomology, with respect to \bfnp, of the algebra of regular functions on $G$ with values in \mywedge (\bfnp\backslash\bfg). We conjecture that \fA[\bfg] describes the algebra of {\it all} physical (i.e., BRST invariant) operators of the noncritical \cW[\bfg] string. The conjecture is verified in the two explicitly known cases, \bfg=\sltw (the Virasoro string) and \bfg=\slth (the \cW_3 string).Comment: 10 pages, Typeset in TeX (with amssym.def input

Commercialisation of precision agriculture technologies in the macadamia industry

A prototype vision-based yield monitor has been developed for the macadamia industry. The system estimates yield for individual trees by detecting nuts and their harvested location. The technology was developed by the National Centre for Engineering in Agriculture, University of Southern Queensland for the purpose of reducing labour and costs in varietal assessment trials where yield for individual trees are required to be measured to indicate tree performance. The project was commissioned by Horticulture Australia Limited

Fusing the coordinates of quantum superspace

We introduce the notion of a fused quantum superplane by allowing for terms $\theta\theta\sim x$ in the defining relations. We develop the differential calculus for a large class of fused quantum superplanes related to particular solutions of the Yang-Baxter equation.Comment: 9 pages, TeX with amssym.def, two references adde

Causes of Indiscipline and Measures of Improving Discipline in Senior Secondary Schools in Ghana: Case Study of a Senior Secondary School in Sunyani

The purpose of the study was to determine the main causes of students’ misbehaviour and measures teachers and students consider to be most appropriate for controlling the unruly behaviour of the students. Purposive, sample, of 50 teachers who held the various positions in the school, and 150 students comprising the Students Representative Council, the class prefects and the class secretaries, was used for the study. Descriptive sample survey was considered to be most appropriate method for the study. A questionnaire was used to collect data from the participants. Majority of the respondents shared the opinion that it is the students themselves who cause such acts of indiscipline. It is only with students late to school and demonstrations that the majority of the respondents attributed the causes to parents and school respectively. A careful look at the statistics of causes of acts of indiscipline on Table 1 shows that apart from the individuals themselves, the school is the next cause of most of the acts of indiscipline. The community closely follows with parents and the media being almost at par. With regard to the measures of ensuring discipline in the School, all the ten measures that were listed were considered by at least 90% of the respondents to be very important. Keywords: students’ misbehaviour, Students Representative Council, and descriptive survey