Additive manufacturing is a promising tool for tailored solutions in chemical engineering. This applies particular to the design of lab-scale packed bed columns. We present experimental results characterize 3D printed structured metal packing and compare it conventional counterpart. The indicate that necessary adjustments process material have an influence on important operating parameters, res...

In this paper, we propose a supervisory control system for motion planning of humanoid robots. The proposed system is hierarchically structured into two levels. The lower level controls and monitors the robots using modular state nets. The upper level generates an optimal sequence of motion for user’s requirements using timed Petri nets. Keywords— humanoid robot, modular state net, timed Petri ...

Functional residues in proteins tend to be highly conserved over evolutionary time. However, to what extent functional sites impose evolutionary constraints on nearby or even more distant residues is not known. Here, we report pervasive conservation gradients toward catalytic residues in a dataset of 524 distinct enzymes: evolutionary conservation decreases approximately linearly with increasin...

Structured packings are widely used in distillation columns to separate various types of mixtures. These have an ordered structure, which ensures more uniform conditions for interaction counter-current flows liquid and vapor than the random a small hydraulic resistance. Nevertheless, with diameter 0.5 m, formation large-scale non-uniformity distribution flow parameters over packing cross-sectio...

let $g$ be a connected graph of order $3$ or more and $c:e(g)rightarrowmathbb{z}_k$‎ ‎($kge 2$) a $k$-edge coloring of $g$ where adjacent edges may be colored the same‎. ‎the color sum $s(v)$ of a vertex $v$ of $g$ is the sum in $mathbb{z}_k$ of the colors of the edges incident with $v.$ the $k$-edge coloring $c$ is a modular $k$-edge coloring of $g$ if $s(u)ne s(v)$ in $mathbb{z}_k$ for all pa...

The equilibrium structure of small particles is analysed by minimising the total surface energy of atomistic clusters. Large deviations from the bulk Wulff construction are identified for fairly large ( 10 nm) particles due to sphere packing corrections. These act as additional edge terms which can be si~i~cantly larger than the true edge terms. For a simplifi~ fee model, it is shown that the f...

Structured packing has been widely used because of large surface area that makes possible columns with high capacity and efficiency. The large surface area also contributes to fire hazards because of hydrocarbon deposits that can easily combust and promote combustion of the thin metal packing materials. Materials of high surface area that can fuel fires include reactive metals, such as titanium...

Pseudomonas cellulosa is an aerobic bacterium that synthesizes an extensive array of modular cellulases and hemicellulases, which have a modular architecture consisting of catalytic domains and distinct non-catalytic carbohydrate-binding modules (CBMs). To investigate whether the main-chain-cleaving pectinases from this bacterium also have a modular structure, a library of P. cellulosa genomic ...