979 research outputs found
Modulation of protein kinase A action by fibronection matrix protein at developing neuromuscular synapses in Xenopus cell cultures.
No full textH.H. Beltman: Natuursteencollecties deel 7
No full textDeel 6 over natuursteencollecties ging over de collectie ir. J.H. Beltman bij het Mineralogisch-Geologisch Museum (MGM) van de TU Delft en hoe deze collectie met 222 marmers terug te voeren valt op de steenhouwerij en machinale fabriek van marmerwerken H.H. Beltman uit Deventer. In deel 7 gaat universitair docent Heritage & Technology en natuursteenspecialist Wido Quist van de TU Delft dieper in op dit bedrijf aan de hand van een in 1907 opgemaakte inventaris van het hele bedrijf en ook op het tweede deel van de inventaris van de collectie.Heritage & Technolog
Synthesis, antiplatelet and vasorelaxing effects of monooxygenated flavones and flavonoxypropanolaines.
No full textLetter from [John Victor Carson], Dominguez Estate Company to MR. John L. Wyatt, June 20, 1938
No full textReferring Mr. Wyatt to Mr. H.H. Jarrett concerning land sales
H. H. Hall
No full textPhotograph - H.H. Hall, school teacher, playing tennis with Revillon Brothers building in the background, Athabasca, Albert
Electronic instabilities and structural fluctuations in self-assembled atom wires
No full textOne-dimensional (1D) solid state systems can behave drastically different from their higher dimensional counterparts. Increased interactions can produce electronic and/or structural instabilities. In this respect, the following fundamental questions are important for a proper understanding of the properties of the ultimate 1D systems consisting of atom wires: Are atom wires created by self-assembly on silicon (Si) surfaces actually stable? Do atom wires exist that are metallic (at low temperatures)? What role is played by defects in these atom wires? This Thesis attempts to find an answer to these questions. Atom wires were realized by self-assembly on vicinal Si surfaces. Using Scanning Tunneling Microscopy and Spectroscopy combined with Density Functional Theory calculations, a full analysis of the (thermodynamic) stability of Gallium (Ga) atom wires on Si(112) has been made, including the energetics of fluctuating intrinsic structural defects. It is shown that the stable atom wires fully passivate the surface, and that the spacing between intrinsic quasi-1D meandering vacancy lines can be tuned continuously through experimental adjustment of the Ga chemical potential. Gold atom wires on the Si(553) surface show an incommensurate metallic state at room temperature. Decreasing the temperature, two competing charge density waves (CDW) within single atom wires are observed, accompanied by a third CDW coexisting in between those wires. Defects in the atom wires induce interband charge transfer, resulting in commensurate CDWs at low temperatures. Finally, manipulatable phase slips with fractional charge and spin are observed for the first time in a CDW in real space.Applied Science
Electronic structure and lattice relaxations in quantum confined Pb films
No full textEpitaxial films that are only several atoms layers thick exhibit interesting properties associated with quantum confinement. The electrons form standing waves, just like a violin string, clamped at both ends. In ultrathin lead films, this so-called `quantum size effect' (QSE) alters the physical properties of the film (such as the resistivity, work function, or thermodynamic stability) in such a way that the even and odd numbered layers show different behavior. Films consisting of 5 or 7 atomic layers are much more stable than films consisting of 4, 6, or 8 atomic layers, for example. The results of photoemission spectroscopy measurements give a detailed insight in the energy of the electrons in the film and explain the observed stability difference between the even and odd numbered layers. Another physical quantity that is expected to depend on film thickness is the distance between the first and second atomic layers. Low Energy Electron Diffraction experiments indeed provide the first quantitative experimental analysis of atom layer relaxations induced by the quantum size effect: even numbered layers show an increase of the distance between the first and second atomic layers with respect to the odd numbered ones. By making the link between atomic and electronic structure, the findings of this thesis have interesting and important implications for the science and technology of materials and devices of nanoscale dimensions.Applied Science
Design-to-Robotic-Production and Operation
No full textThe development of physical and computational mechanisms aimed at augmenting architectural environments has been one of the foci of research implemented at the Faculty of Architecture and the Built Environment, Delft University of Technology (TUD) for more than a decade. This paper presents the integration of distributed responsive climate control into the built environment based on Design-to-Robotic-Production and -Operation (D2RP&O) principles. These connect computational design with robotic production and operation of buildings. In the presented case study structural elements meet load-bearing as well as functional requirements. Their spatial arrangement creates variable densities for accommodating sensor-actuators that are operating heating and cooling. This mechatronic operation relies on activity recognition for achieving responsive climate control in the built-environment.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Architectural Engineerin
Advantages and limitations of river-sea shipping, taking as example the West-European - Mediterranean (Egyptian) route
No full textAfdeling Maritime and Transport TechnologyMechanical, Maritime and Materials Engineerin
Computational bone mechanics: The interrelationships between shape, density distribution, and loading
No full textBioMechanical EngineeringMechanical, Maritime and Materials Engineerin
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