Problems of testing three hypotheses : (i) equality of covariance matrices of several multivariate normal populations, (ii) sphericity, and (iii) that a covariance matrix is equal to a specified one, are treated. High–dimensional Edgeworth expansions of the null distributions of the modified likelihood ratio test statistics are derived. Computable error bounds of the expansions are derived for ...

This paper presents the results of preliminary investigations of globular moss growth on the surface of Falljökull, a temperate outlet glacier of the Vatnajökull ice cap, Southern Iceland. Supraglacial debris has provided a basis for moss colonisation and several large (>500m) patches of moss growth (Racomitrium spp.) are observed on the surface of the glacier. Each area of moss-colonised supra...

We compared the prognostic value of the Catterall grouping, the Salter-Thompson grading, the arthrographic shape of the femoral head, and the Herring lateral pillar grouping during the fragmentation stage of Perthes' disease in 73 patients with 81 affected hips. Radiographs were available for study from the onset of the disease until skeletal maturity. We used the Stulberg classification to ass...

The effect of cooking duration on the chemical, physical and thermal properties of bambara groundnut were investigated. The samples were analyzed for chemical composition, physical properties (length, width, and thickness, arithmetic mean, geometric mean, sphericity, surface area and aspect ratio) and thermal properties (specific heat capacity, thermal conductivity and thermal diffusivity). Dat...