In this paper the methodology of biplots is introduced as a means for monitoring the behaviour of process systems. This sophisticated methodology allows for the projection of high-dimensional data to a low-dimensional subspace that can be visualised by a human operator. The projections are highly graphical in nature, and rich in information regarding variation in process variables, correlations...

Ultrasound (US) thermotherapy is used to treat tumours, located deep in human tissue, by heat. It features by the application of high intensity focused ultrasound (HIFU), high local temperatures of about 90 degrees C and short treating time of a few seconds. Dosage of the therapy remains a problem. To get it under control, one has to know the heat source, i.e. the amount of absorbed US power, w...

Under the assumption that the Aitchison geometry holds in the simplex, standard analysis of compositional data assumes a uniform distribution as reference measure of the space. Changing the reference measure induces a weighting of parts. The changes that appear in the algebraic-geometric structure of the simplex are analysed, as a step towards understanding the implications for elementary stati...

Analysis of cultivar by environment (C E) interaction can improve efficiency of crop breeding efforts. Variety selection and recommendation based on wheat (Triticum aestivum L.) yield testing trials could possibly benefit from this type of analysis as well. The objectives of the present work were to evaluate methods to identify relevant testing environments and improve the predictive value of d...

For more than 20 years, variants of correspondence analysis have arisen that accommodate for the structure ordered categorical variables using orthogonal polynomials. When visual display from this is biplot, projections linking origin to standard coordinate each category a common feature. In case when column variable, say, consists categories, biplot can be constructed so their determined polyn...

Kebutuhan jagung nasional cenderung mengalami peningkatan setiap tahunnya seiring semakin menurunnya luas lahan pertanian. Tumpang sari dapat menjadi solusi untuk meningkatkan produksi dalam efisiensi penggunaan pertanian yang berkurang. Varietas toleran tumpang dihasilkan melalui plasma nutfah memiliki variabilitas dan heritabilitas tinggi. Tujuan penelitian ini mengetahui informasi mengenai p...