We present and analyze a simpliied, scale-separated, anelastic uid model which is designed to assess the innuence of weak compressibility in the diiusive transport of a passive scalar. Our model incorporates a slowly varying, density induced, anisotropy into a xed, rapidly varying (small scale) uid ow. This anisotropy is physically motivated through the anelastic mass balance which retains vert...

Mining textual sources of data can be used to design studies and test theories at temporal and spatial scales unheard of in the past. This opens up new opportunities for conflict studies and ethnographic research. We conducted a semi-automated network analysis of the 2003–2010 Sudan Tribune online news articles and modeled ethnic-group conflict in Sudan. We tested whether an ethnic group’s conn...

Crop identification is the basis of crop monitoring using remote sensing. Remote sensing the extent and distribution of individual crop types has proven useful to a wide range of users, including policy-makers, farmers, and scientists. Northern China is not merely the political, economic, and cultural centre of China, but also an important base for grain production. Its main grains are wheat, m...

BACKGROUND Few studies have employed the item response theory in examining reliability. We conducted this study to examine the effect of Rating Scale Categories (RSCs) on the reliability and fit statistics of the Malay Spiritual Well-Being Scale, employing the Rasch model. METHODS The Malay Spiritual Well-Being Scale (SWBS) with the original six; three and four newly structured RSCs was distr...

In this paper we present a multi-scale morphological method for use in texture classification. A connected operator similar to the morphological hat-transform is defined, and two scale-space representations are built. The most important features are extracted from the scale spaces by unsupervised cluster analysis, and the resulting pattern vectors provide the input of a decision tree classifier...

The acoustic attenuation properties of sonic crystals have been studied in the last decades in different fields of interest. Matching the so-called band gap, in which very high attenuation is obtained, with the dominant noise frequencies in order to obtain tailor-made solutions for certain applications is an appealing concept, which makes these structures an interesting alternative to existing ...