ANALISIS KINERJA DAN LAJU PENGERINGAN PADA PENGERING HYBRID DENGAN VARIASI SUMBER ENERGI PEMANAS

ANALISIS KINERJA DAN LAJU PENGERINGAN PADA PENGERING HYBRID DENGAN VARIASI SUMBER ENERGI PEMANA

PPDM PENGEMBANGAN PEMANFAATAN TENAGA SURYA UNTUK PENERANGAN JALAN DESA DI DESA MASSAMATURU

PPDM PENGEMBANGAN PEMANFAATAN TENAGA SURYA UNTUK PENERANGAN JALAN DESA DI DESA MASSAMATUR

Public swimming pools in Australia

In Australia the image of sporting prowess and easy access to swimming venues — both natural and artificial — has ensured that public swimming pools became a site of modern architectural interest and design experimentation from the 1930s onwards. Ranging from prosaic, local amenities to award-winning significant complexes, public pools are fascinating and potent places of individual and community memories and experiences. Many still exist but many others have been lost or detrimentally altered in the last two decades. As a modern type they deserve further documentation and careful conservation and adaptation to suit contemporary use

Distributional equivalence and subcompositional coherence in the analysis of contingency tables, ratio-scale measurements and compositional data

We consider two fundamental properties in the analysis of two-way tables of positive data: the principle of distributional equivalence, one of the cornerstones of correspondence analysis of contingency tables, and the principle of subcompositional coherence, which forms the basis of compositional data analysis. For an analysis to be subcompositionally coherent, it suffices to analyse the ratios of the data values. The usual approach to dimension reduction in compositional data analysis is to perform principal component analysis on the logarithms of ratios, but this method does not obey the principle of distributional equivalence. We show that by introducing weights for the rows and columns, the method achieves this desirable property. This weighted log-ratio analysis is theoretically equivalent to “spectral mapping”, a multivariate method developed almost 30 years ago for displaying ratio-scale data from biological activity spectra. The close relationship between spectral mapping and correspondence analysis is also explained, as well as their connection with association modelling. The weighted log-ratio methodology is applied here to frequency data in linguistics and to chemical compositional data in archaeology.Association models, biplot, compositional data, contingency tables, correspondence analysis, distributional equivalence, log-ration transformation, ratio-scale data, singular value decomposition