3Mortimer, J. Amer. Chem. Soc., 44, 1416 (1922); 45, 633 (1923). 4 Hildebrand, J. H., and Jenks, C. A., Ibid., 42, 2180 (1920); 43, 2172 (1921); cf. also Ref. 2, p. 148. 5 Dorfman, M., and Hildebrand, J. H., Ibid., 49, 729 (1927). 6 Cf. Hildebrand, J. H., and Glasscock, B. L., Ibid., 31, 26 (1909). 7 Porter, A. W., Trans. Faraday Soc., 16, 336 (1921). 8 Cf. Ref. 2, p. 48. 9 Taylor, N. W., J. Am...

Fragmentation analysis of the Whitewater watershed, in southeast Minnessota, revealed 4 structural measures of grass-shrub habitat that were significant predictors of sensitive species population densities. Models were developed using simple linear regression and further refined to incorporate spatial autocorrelation using a Moran’s test. Significant variables were divided into a five class ord...

When exploratory spatial data analyses are conducted, choropleth mapping is an important means to display 1) the patterns of the spatial observations for enumeration areas, such as counties or Census Tracts, and 2) the resulting spatial statistical outcomes. Choropleth maps group spatial observations into classes and each class is then assigned a particular color that is used to shade the enume...

RESUMO O estudo propôs a elaboração de um índice vulnerabilidade à propagação da COVID-19 utilizando análise multivariada associada geoespacial. método empregado considerou como uma combinação três fatores: exposição, susceptibilidade e capacidade resposta. A metodologia foi composta seis etapas: seleção agrupamento variáveis; definição dos indicadores; normalização; atribuição pesos via compon...

Metal(100) homoepitaxial systems constitute perhaps the simplest class of systems in which to study thin film growth. Yet, our Variable-Temperature Scanning Tunneling Microscopy (VTSTM) analysis of Ag/Ag(100) homoepitaxy reveals that the variation of roughness with temperature is extraordinarily complex. As the deposition temperature is reduced from 300K to 50K, the roughness of 25 monolayer fi...

Statistical maps are of great interest both to cartographers and to statisti cians. Cartographers and geographers consider such maps as a very important cate gory of thematic maps. Statisticians view them as applications of the graphicalstatistical method to the special case in which the data to be graphed are detailed geographically. Professor Jenks and Professor Robinson have discussed statis...