The use of computers in Australian local government

This paper reports on the extent of computer utilization amongst Australian local governments. Replies to a questionnaire circulated to all local governments in mid-1977 showed that computer usage was increasing markedly at that time. Estimates of future usage were made. The types of equipment, the computer languages, the use of bureau services, and the purposes to which the computers were put were assessed from the questionnaire to provide an overall picture of the degree of computerization amongst local governments.     

The Coal Cutter as a Seismic Source in Channel Wave Exploration

The detection of faults in coal seams using underground seismic techniques is now well established. In this paper we propose the use of the coal cutter as a seismic source. Coal production, far from being disrupted by hole drilling and shot firing, is an integral part of the technique.     

Frequency-domain upper bounds for signals on a multiconductor transmission line behind an aperture

This paper develops a technique for bounding the maximum voltages and currents at terminations of a muiticonductor transmission line (MTL) located behind an aperture-perforated conducting screen excited by an electromagnetic field in the frequency domain. The electromagnetic field is coupled through a small aperture as the excitation of a multiconductor transmission line behind the aperture. A model is presented in terms of external and internal sources which in turn create traveling waves on the multiconductor transmission line. These traveling waves transfer energy to the terminations. The energy at a termination is translated into voltages and currents from which the upper bounds are determined. These upper bounds are obtained using vector norms and associated matrix norms. The formulation is presented in the frequency domain to obtain useful upper bounds for analysis of multiconductor transmission line geometries with aperture excitation.     

Automatic segmentation of electron micrographs of berea sandstone cross-sections

This paper describes methods of segmenting electron micrographs of rock cross-sections into “pores” and “grains”. Pores are extracted by a thresholding-based scheme. Grain extraction is more difficult, since the grains are packed together. A multiresolution technique is used to link the edges and cracks surrounding the grains so as to separate the non-pore regions into individual grains.     

A method of smoothing digital thematic maps

A method has been developed for the smoothing of digital thematic maps such as those derived from LANDSAT data. The method permits one to specify a minimal area for each feature represented on the map. After application of the method all the regions belonging to any given feature have areas equal to or greater than the minimum for the feature. In this report the results are presented for a particular example.     

Enantioselective two-phase hydrogenation of α-amino acid precursors with water soluble rhodium complexes of the cationic ligand (S,S)-2,4-bis[bis-(p-N,N,N-trimethylammoniumphenyl)phosphino]pentane, [CH3CH(P(p-C6H4NMe3)2CH2CH(P(p-C6H4NMe3)2CH3]4+

Rhodium complexes of the chiral cationic phosphine, (S,S)-2,4-bis[bis-(p-N,N.N-trimethyl-ammoniumphenyl)phosphino]pentane show excellent enantioselectivity for the hydrogenation of the DOPA precursor. (Z)-3-OMe,4-OAcC₆H₃CHC(COOH)(NHCOCH₃), and dehydro-phenylalanineacetamide as slurries in water. The catalytic reactions may be done in either a two-phase system with the catalyst in the aqueous phase or as a slurry in water provided the substrates have some water solubility. Enantioselectivities of as high as 95% can be obtained.     

COMPLETENESS THEOREM FOR A PRODUCT OF SELF-ADJOINT MATRICES

It is proven that the matrices AB and BA formed from the product a positive definite self-adjoint matrix A and a self-adjoint matrix B has real eigenvalues and a complete set of eigenvectors. If B is positive (negative) semidefinite the eigenvalues are greater (less) than or equal to zero. These properties have been useful in the analysis of multicomponent diffusion and distillation processes.     

Interactional approach to interpersonal attraction.

Believing they were exchanging attitude surveys with a stranger, 270 undergraduates of high or low self-esteem (Texas Social Behavior Inventory) were randomly assigned to 0, 50, or 100% attitude similarity conditions. They indicated on the Interpersonal Judgment Scale their attraction to the stranger and estimates of the stranger's probable attraction to them. Attitude similarity significantly affected Ss' attraction to the stranger and estimates of strangers' attraction to the S. Ss closely approximated predictions of D. Byrne and D. Nelson's (1965) formula in estimating attraction from the stranger. Moreover, attitude similarity influenced goodness of fit between formula predictions and attraction estimates and influenced assumptions about attraction reciprocity. Self-esteem did not influence attraction to the stranger or expected attraction from the stranger. (12 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)