Robot Operating System, or ROS, is poised to do the same for robots. Morgan Quigley programmed the first iteration of what grew into ROS as a graduate student in 2006, and today his opensource code is redefining the p...
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Robot Operating System, or ROS, is poised to do the same for robots. Morgan Quigley programmed the first iteration of what grew into ROS as a graduate student in 2006, and today his opensource code is redefining the practical limits of robotics. Since version 1.0 was released in 2010, ROS has become the de facto standard in robotics software. Unlike more conventional robotic technology, Quigley's four-fingered hand is not controlled by a central processor. Its fingers and palm distribute computing chores among 14 low-cost, low-power processors dedicated to controlling each joint directly. The masterstroke in Quigley's design is not strictly technical but social. Members of the community who produce a finished release can distribute it themselves, rather than having to house it on central servers.
Das Methylsulfonyloxyl‐Radikal, CH 3 SO 3 , ein Schlüsselintermediat der atmosphärischen Oxidation von Dimethylsulfid (DMS), wurde durch Blitzpyrolyse von CH 3 SO 2 OOSO 2 CH 3 erzeugt und nachfolgend in fe...
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Das Methylsulfonyloxyl‐Radikal, CH 3 SO 3 , ein Schlüsselintermediat der atmosphärischen Oxidation von Dimethylsulfid (DMS), wurde durch Blitzpyrolyse von CH 3 SO 2 OOSO 2 CH 3 erzeugt und nachfolgend in festen Edelgas‐Matrizen isoliert. Das Radikal wurde charakterisiert über seine UV/Vis‐ und IR‐Spektren, sowie seine Tautomerisierung zum CH 2 SO 3 H unter Bestrahlung mit Licht von λ ≥360 nm.
Diphenyl （4-hydroxyphenyl） hexadecyl phosphonium bromide （POH） -modified montmorillonite （POHMMT） was used to prepare a novel TiC14/MgC12/POHMMT compound catalyst and exfoliated iPP/POHMMT nanocomposites were pr...
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Diphenyl （4-hydroxyphenyl） hexadecyl phosphonium bromide （POH） -modified montmorillonite （POHMMT） was used to prepare a novel TiC14/MgC12/POHMMT compound catalyst and exfoliated iPP/POHMMT nanocomposites were prepared by the in situ intercalative polymerization of propylene with the TiC14/MgC12/POHMMT compound catalyst. The POH surfactants don＇t change the catalytic characteristic of the Z-N catalyst and the obtained PP presents high isotacticity, normal molecular weight and molecular weight distribution. The WAXD, SAXS and TEM results demonstrate the highly exfoliated iPP/POHMMT nanocomposites were produced by the in situ polymerization with this novel catalyst, while the intercalated iPP/Na＋MMT nanocomposites were produced with the TiC14/MgC12/Na＋MMT compound catalyst. Through this approach, in situ propylene polymerization can actually take place between the silicate layers and lead not only to PP with high isotacticity and molecular weight, but also to highly exfoliated PP nanocomposites.
Supramolecular assembly can yield ordered structures by taking advantage of the cumulative effect of multiple non-covalent interactions between adjacent molecules. The thermodynamic origin of many self-assembled struc...
Supramolecular assembly can yield ordered structures by taking advantage of the cumulative effect of multiple non-covalent interactions between adjacent molecules. The thermodynamic origin of many self-assembled structures in water is the balance between the hydrophilic and hydrophobic segments of the molecule. Here, we show that this approach can be generalized to use solvophobic and solvophilic segments of fully hydrophobic alkylated fullerene molecules. Addition ofn-alkanes results in their assembly—due to the antipathy of C60towardsn-alkanes—into micelles and hexagonally packed gel-fibres containing insulated C60nanowires. The addition of pristine C60instead directs the assembly into lamellar mesophases by increasing the proportion ofπ-conjugated material in the mixture. The assembled structures contain a large fraction of optoelectronically active material and exhibit comparably high photoconductivities. This method is shown to be applicable to several alkyl–π-conjugated molecules, and can be used to construct organized functional materials withπ-conjugated sections.
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