The Yale art historian George Hersey showed us the columns in Figure 1 and asked us whether the ideas of symmetry breaking could be used to help classify architectural columns. Provoked by this question and the intriguing columns in that figure, we attempted to answer Hersey in the following way. We view a column as a deformed cylinder and column symmetries as the subgroup of the symmetries of ...

Numerous existing formulas predicted the ultimate interfacial bond strength in concrete-filled steel tubes (CFST) between and concrete core without investigating whole response under push-out load. In this research, four models are proposed to predict behavior CFST including post-peak branch loading test based on 157 circular specimens 105 squared from literature. Two (one for one CFST) develop...

Abstract One of the primary causes that can reduce lifespan concrete structures is chloride-induced corrosion reinforcing steel. Recent research has shown material properties, exposure conditions and climatic have a significant influence on structural deterioration reinforced (RC) structures, especially in marine environments. The objective this paper to predict durability RC damaged by near-sh...

2 Introduction In the April edition of this magazine1 Ron Majors, in his annual report on new columns and accessories from the Pittsburgh conference, reported how at the 2002 conference the largest number of product introductions were for biomolecule separations and for liquid chromatography–mass spectrometry (LC–MS). He went on to state that speciality HPLC columns for chiral compounds, biomol...

Crystalline bovine or porcine glucagon was fractionated by chromatography on columns of DEAE-cellulose in the presence of buffers containing ‘7 M urea. About 89% of the recovered protein comprises highly purified glucagon; 10% is monodesamidoglucagon and another 0.8 % resembles glucagon in amino acid composition and in electrophoretic mobility. The monodesamidoglucagon was identified and charac...