spatial pattern of trees can possibly indicate stand history, population dynamics, and species competition. this research was investigated in the chahartagh forest reserve, ardal region, chaharmehal and bakhtiari province, central zagros forest, and southwest iranian state. in this study 53 hectare of the study area was selected and perfect inventory.  information includes the position and kind...

We propose a novel approach to automatically tracking cell populations in time-lapse images. To account for cell occlusions and overlaps, we introduce a robust method that generates an over-complete set of competing detection hypotheses. We then perform detection and tracking simultaneously on these hypotheses by solving to optimality an integer program with only one type of flow variables. Thi...

The idea that different species must have distinct ecologies if they are to coexist has been challenged recently by the claim that some models involving stochastic factors or clumped spatial distributions permit stable coexistence of species that are identical or differ only in competitive ability. However, these models have been misinterpreted; except in rather limited circumstances, they prov...

Recent studies of massive O-type stars present clear evidences of inhomogeneous and clumped winds. O-type (H-rich) central stars of planetary nebulae (CSPNs) are in some ways the low mass–low luminosity analogous of those massive stars. In this contribution, we present preliminary results of our on-going multi-wavelength (FUV, UV and optical) study of the winds of Galactic CSPNs. Particular emp...

While several software programs exist to count bacterial colonies on a Petri plate, no suitable solution is available for quick and reliable enumeration of small, live insects. We have written a program called FlyCounter that can obtain counts from images, even if insects are highly clumped in space. We also describe a simple and inexpensive system for anesthetizing and capturing high-quality i...

In this work we quantify the degree to which star-forming events are clumped. We apply a precise and accurate technique to calculate the correlation dimension Dc of the distribution of HII regions in a sample of disk galaxies. Our reliable results are distributed in the range 1.5 ∼< Dc ∼< 2.0. We get significant variations in the fractal dimension among galaxies, contrary to a universal picture...

The Barents Sea basin is an oil and gas province containing more than 760 million tons of equivalents. reservoir geology the complex due to multiple episodes subsidence, uplift erosion, which opened a network extensional wrench related faults allowing for fluid migration. multifaceted geological history complicates efforts describe source characteristics natural in subsurface Sea. Here we apply...