We survey the recent applications and developments of sieve methods related to discrete groups, especially in the case of infinite index subgroups of arithmetic groups.

Hydroponic systems are an attractive form of urban agriculture due to their low weight load, inert substrate conditions, and overall better control plant nutrition growth. However, gaining food sovereignty cannot be at the cost increasing environmental impacts, such as eutrophication nonrenewable resource depletion, associated with phosphorus fertilizer use. Struvite, a wastewater byproduct, is...

Interest in generating lignocellulosic biofuels through enzymatic hydrolysis continues to rise as nonrenewable fossil fuels are depleted. The high cost of producing cellulases, hydrolytic enzymes that cleave cellulose into fermentable sugars, currently hinders economically viable biofuel production. Here, we report the crystal structure of a prevalent endoglucanase in the biofuels industry, Cel...

Soil erosion in developing countries is a widespread problem causing considerable economic damage. It still remains an intractable problem in many countries. Available research findings on costs of soil erosion indicate them to be high. Soil erosion continues to be a problem due to the difficulties of estimating the economic damages and attendant difficulties in developing effective control pol...

A hybrid Constraint Programming (CP) formulation able to address the multi-stage batch scheduling problem is presented. This approach handles different features found in industrial environments such as finite unit ready-times, dissimilar parallel equipment in each stage, sequence-dependent changeover times, topology constraints, forbidden job-equipment assignments, etc. Moreover, it renders goo...

Replacing nonrenewable polymers with renewable ones is desirable for packaging applications. For this purpose, a number of poly(glucaramides) were synthesized and tested for applications requiring water resistance. The polymers were prepared from the polycondensation of esterified glucaric acid and a diamine, the former being obtained from the oxidation of glucose, thus providing a renewable so...