A comparison of concrete containing recycled concrete coarse aggregates and natural coarse aggregates subjected to high strain, low cycle compressive fatigue is presented. Using a strain based feedback control loop, concrete cylinders are compressed at 15µε/s to a specified strain then unloaded to zero stress for 10 cycles. After cycling, all samples are loaded to a strain of 0.008. Direct conc...

Probability answer set programming [Saad and Pontelli, 2006; Saad, 2006; Saad, 2007a] is a declarative programming that has been shown effective for representing and reasoning about a variety of probability reasoning tasks [Saad, 2008a; Saad, 2011; Saad, 2007b; Saad, 2009; Saad, 2008b]. However, the lack of probability aggregates, e.g. expected values, in the language of disjunctive hybrid prob...

Water-membrane partition and aggregation behavior are fundamental aspects of the biological activity of antibiotic peptides, natural compounds causing the death of pathogenic organisms by perturbing the permeability of their membranes. A synthetic fluorescent analog of the natural lipopeptaibol trichogin GA IV was used to study its interaction with model membranes. Time-resolved fluorescence da...

This paper investigates the properties of some natural fine aggregates in Minna and its environs. Nine soil samples were obtained from different locations and transported to Civil Engineering Laboratory, Federal University of Technology, Minna, Nigeria. Tests conducted on the soil samples include: specific gravity, sieve analysis, bulk density and silt content. Test result revealed the specific...

Plastic waste disposal is a significant environmental concern due to its low degradability and management practices, especially in developing countries. recycling considered the most effective method, which minimizes impacts. This paper discusses use of poly(ethylene terephthalate) (PET), high-density polyethylene (HDPE), polypropylene (PP) plastic as aggregates concrete industry by incorporati...

The exponential expansion in concrete use has put the environment under immense pressure to supply cement, aggregates, and water. Natural resource consumption impacts undermines industry. A swift shift towards sustainable is required considering emergency triggered by human activity on climate. Glass (GC) sparked curiosity of construction industry owing its environmentally friendly approach. st...

Raindrops disperse large soil aggregates into smaller particles, which can clog soil pores, cause soil crusting, reduce rainfall infiltration and increase soil loss. It was found that natural polymer derivatives were effective in improving soil physical properties and decreasing soil erosion on an experimental loess hillslope. This study investigated the effect of new natural polymer derivative...

Explaining the origins and maintenance of cooperation in nature is a key challenge in evolutionary biology. A recent study demonstrates two novel mechanisms through which the natural ecology of sinking ocean aggregates--colloquially called 'marine snow' - promotes cooperation.