We used a multi-method approach to analyze the spatial patterns of shrubs and cover types (plant species, litter or bare soil) in grassland-shrubland ecotones. This approach allows us to assess how fine-scale spatial heterogeneity of cover types affects the patterns of Cytisus balansae shrub encroachment into mesic mountain grasslands (Catalan Pyrenees, Spain). Spatial patterns and the spatial ...

The phenomenon of ball lightning still remains one of the greatest mysteries in the field of the plasma science and electromagnetism. Despite enormous contemporary advancements into the micro-world – the structure of elementary particles, nuclei, atoms, and the origin, evolution, and structure of the universe, the natural phenomenon of ball lightning, which literally appears right in front of o...

Abstract. Tail order of copulas can be used to describe the strength of dependence in the tails of a joint distribution. When the value of tail order is larger than the dimension, it may lead to tail negative dependence. First, we prove results on conditions that lead to tail negative dependence for Archimedean copulas. Using the conditions, we construct new parametric copula families that poss...

Mid rift valley of east Shewa, Ethiopia is among the potential commercial irrigated intensive vegetable production areas [1] supplying a variety of vegetables to every corners of the country. Onion, tomato, maize, kale, hot pepper, watermelon, green bean and head cabbage are among the major vegetable crops widely produced for national and local markets. Okra, cucurbit and sweet melon are also c...

We present a case of incidentally discovered congenitally corrected transposition of the great arteries (ccTGA), initially seen on stress-rest myocardial perfusion imaging (MPI). ccTGA has a characteristic appearance on MPI, which reflects the functional alterations associated with this condition.

One of the most important steps in environmental studies is to get an accurate distribution of the pollutants in terms of its quantity and qualities. Some environmental studies are acquiring a good classification of the particle size including the average mean of the particle. Many researchers use the median size (x50) or until the size passing 80% cumulative undersize (x80) as a measure for ev...