Precast concrete (PC) slabs are widely used in the assembly of residential buildings. The PC manufactured at factory and then arranged stacks for transport to construction site assembly. Currently, optimization stacking plans focuses on yard-space utilization transportation efficiency rarely considers sequence; secondary sequencing prefabricated elements is required during meet lifting scheme, ...

Pressure vessels are subjected to stresses in axial and radial directions during their service life, which causes undesirable damages. For that reason, it is highly important design the fiber composite overwrapped pressure such a way can carry loads occurring both directions. In this context, with 20 mm polar opening radii were designed geodesic dome profile was obtained by solving elliptic int...

Helical junctions are important elements in the architecture of folded RNA molecules. The global geometry of fully base-paired four-way junctions between RNA helices has been analyzed by comparative gel electrophoresis. Junctions appear to fold by pairwise coaxial helical stacking in one of two possible stereochemically equivalent isomers based upon alternative selections of stacking partners. ...

low stacking fault energy face centered cubic (fcc) materials contain characteristic defect structures. stackingfault tetrahedral are one of those rare structures that occur under special experimental conditions. for the first time,stacking fault tetrahedral were observed in fe-30mn-3al-3si twinning induced plasticity (twip) steel. theirpresence resulted from a quenching heat treatment.

stability of the π-π stacking interactions in the ben||n-substituted-coronene complexes was studied using the computational quantum chemistry methods (where ben is benzene and || denotes π-π stacking interaction, and n-substituted-coronene is coronene molecule which substituted with different number of n atoms). the results reveal simultaneous effects of structure and number of heteroatom on th...

In this paper, we address the Stacking Problem. Its objective is to determine the sequence of movements carried out by a stacking crane to store and retrieve a set of homogeneous blocks in a two-dimensional storage during a well-defined planning horizon in such a way that the number of relocation movements is minimized. We propose a heuristic algorithm that determines the target stack of each i...