The geographic mosaic theory of coevolution predicts 1) spatial variation in predatory structures as well as prey defensive traits, and 2) trait matching in some areas and trait mismatching in others mediated by gene flow. We examined gene flow and documented spatial variation in crushing resistance in the freshwater snails Mexipyrgus churinceanus, Mexithauma quadripaludium, Nymphophilus minckl...

A challenge in numerical simulation of crashworthiness study is to be able to predict the crush damage modes, their evolution during crushing and the energy absorption in any composite structure from elementary material characterisation data. Therefore, it is important to know the behavior of one ply subjected to crushing load, and especially to determine the mean crushing stress that could be ...

10 Building activities are recognised to produce coarse particulate matter but less is 11 known about the release of airborne ultrafine particles (UFPs; those below 100 nm 12 in diameter). For the first time, this study has investigated the release of particles 13 in the 5–560 nm range from three simulated building activities: the crushing of 14 concrete cubes, the demolition of old concrete sl...

Abstract During installation of driven or jacked piles in sand, particle crushing occurs a region below the base these piles. Quantification degree and extent during driving jacking sand is necessary to improve current design methods. To study effects on capacity uniform silica samples, model pile was tested half-cylindrical calibration chamber with transparent observation windows its front wal...

This research focuses on understanding biosorption process and developing a cost effective technology for treatement of heavy metals-contaminated domastic water. A new biosorbent has been prepared by crushing of neem leaves. The experiments were designed according to Taguchi’s (L16) orthogonal array to optimize experimental runs. In order to assess the biosorption behavior of neem leaves satisf...

Studies of the crushing behavior of closed-cell, aluminum foam-filled aluminum and steel tubes have shown an interaction effect between tube wall and foam filler [1, 2, 3]. The crushing loads of foam-filled tubes are, therefore, found to be higher than the sum of the crushing loads of foam (alone) and tube (alone) mainly due to this effect. Santosa et al. [1], based on FEM results, proposed the...