A high degree of topical diversity is often considered to be an important characteristic of interesting text documents. A recent proposal for measuring topical diversity identifies three elements for assessing diversity: words, topics, and documents as collections of words. Topic models play a central role in this approach. Using standard topic models for measuring diversity of documents is sub...

This document explains diversity related methods in vegan. The methods are briefly described, and the equations used them are given often in more detail than in their help pages. The methods discussed include common diversity indices and rarefaction, families of diversity indices, species abundance models, species accumulation models and beta diversity, extrapolated richness and probability of ...

in order to study genetic diversity and detection relationship among agronomy traits, 169 barley recombinant inbred line (generation=rils) and their parents “igre” and “arigashar”, were planted in a simple lattice design with two replications. ten agronomic traits were scored on three randomly selected plants. the purpose of this study was detection of phenotype and genotype correlation between...

The effects of satellite diversity on Ka-band rain attenuation were investigated in three propagation paths with azimuth angle separation of about 30 deg in Japan. The Ku-band (14/12 GHz) attenuation was converted to the Ka-band down-link (19.45 GHz) attenuation by the frequency scaling methods considering the difference of raindrop size distributions. As for the attenuation of 20 dB, time perc...

Structural genomics projects are leading to the discovery of relationships between proteins that would not have been anticipated from consideration of sequence alone. However the assignment of function via structure remains difficult as some structures are compatible with a variety of functions. In this study we explore the relationships between structural diversity and functional diversity wit...

Cooperative relaying recently emerged as a viable option for future wireless networks. By simultaneously exploiting path loss savings known from relaying scenarios and the diversity inherent to any scheme involving spatially separated transmitters, this technique is able to leverage gains from both relaying and spatial diversity techniques. In this paper, we study different cooperative relaying...

Habitat distribution and seasonal occurrence of carabid beetles were determined using pitfall traps in 1999 and 2000 in the temperate forest zone of the Dongling Mountain, North China. Eight sites differing in vegetation and moisture were selected so as to represent four habitat types. Carabid assemblages of the six forested habitats (lowland, upland and coppice) were more similar to each other...