By using Augmented Reality in Human-Robot-Interaction scenarios we propose it is possible to improve training, programming, maintenance and process monitoring. AR Enhanced Human Robot Interaction means it is possible ...
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By using Augmented Reality in Human-Robot-Interaction scenarios we propose it is possible to improve training, programming, maintenance and process monitoring. AR Enhanced Human Robot Interaction means it is possible to conduct activities not only in a training facility with physical robot(s) but also in a complete virtual environment. By using virtual environments only a computer and possibly Head Mounting Display is required. This will reduce the bottlenecks for with overbooked physical training facilities. Physical environment for the activities with robot(s) will still be required, however using also virtual environments will increase flexibility and human operator can focus on training more complicated tasks.
Efficient heat dissipation is of major importance in advanced packages of high performance integrated circuits (IC's). To ensure and extend the integration density, 3D chip stacking with multiple silicon dies vert...
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ISBN:
(纸本)9783863592967
Efficient heat dissipation is of major importance in advanced packages of high performance integrated circuits (IC's). To ensure and extend the integration density, 3D chip stacking with multiple silicon dies vertically arranged on top of each other is indispensable. However, these packages require an enhanced thermal management, in order to dissipate the heat from each stacked die to the heat sink. This report presents a process flow for an advanced concept of percolating thermal underfills using the sequential assembly of micron- and nano-sized particles. Due to an improved connection of the micron-sized particles by bridges of a nano-sized compound material, a highly percolated network with increased thermal conductive paths will be described. A thermal conductivity of up to 3.8 Wm-1K-1 was already demonstrated for the resulting composite material [1]. This study focuses on three main process steps, the centrifugal filling of micro-particles into a defined silicon cavity to form a percolating particle bed, the self-assembly of nanoparticles around the spherical contact surfaces by capillary bridging (so-called "neck" formation) and the capillary backfilling of the formed particle network with an epoxy. For the centrifugal filling, silica and alumina spheres with diameters ranging from 27 um to 30 μm and 25 μm to 36 μm, respectively, were dispensed into a rotating filling plate. As a substitute for the solder ball interconnects within a chip stack, fabricated silicon cavities with different pillar layouts are filled with microparticles. The dependencies of the fill fraction, fill front, packing structure and occurring defects on the rotational speed are studied. Particularly, an empty space in the particle bed behind the pillars in fill direction (referred to as "shadowing") appeared as defect. Furthermore, the work discusses processing aspects to form necks by capillary bridging between the microparticles. For the initial experiments, metal-based nano-particle in
Hymenopterous insects are able to drill several inches into fresh wood with an egg-laying organ (ovipositor) as thin as a hair, to deposit their eggs. Up to now only one method of boring, i.e. rotary drilling, is tech...
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Hymenopterous insects are able to drill several inches into fresh wood with an egg-laying organ (ovipositor) as thin as a hair, to deposit their eggs. Up to now only one method of boring, i.e. rotary drilling, is technically used. The transfer of biomimetic principle to the field of orthopedic surgery was done in the bionic development process. The analysis of the anatomy and physiology of hymenoptera led to the realization that it is of utmost importance to have the drill composed of three parts to enable a balanced drilling process without transfer of torque to the work piece. This principle was then implemented in a prototypical functional and design model of a drill rasp for creating cavities in the thigh bones for the form-fitted insertion of cementless hip prosthesis stems. The challenge was to design a drilling device for application in an operating theater. Thus, the emphasis was on an ergonomic user experience, hygiene before and during the process, the specific anatomy of the thigh bone, and an optimal workflow during the operation. A patent application was filed for the technical implementation and received the brand name Sirex™ in accordance with a wood wasp genus.
Today, carrier-envelope-phase (CEP) stable laser pulses have become a versatile tool for a plethora of scientific applications. Many years their generation relied on either optical parametric amplification or the use ...
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ISBN:
(纸本)9781509067374
Today, carrier-envelope-phase (CEP) stable laser pulses have become a versatile tool for a plethora of scientific applications. Many years their generation relied on either optical parametric amplification or the use of titanium-sapphire amplifiers. Although impressive results have been achieved using these technologies [1,2], their main drawback is the restricted average power (and therewith repetition rate for a given energy) due to thermo-optical limitations. Here we report on another approach, the nonlinear compression of ultrafast ytterbium-based high-power fiber lasers [3]. The first commercially available source employing this technology is the HR1 laser constructed for the ELI-ALPS research facility in Szeged, Hungary. The Extreme Light Infrastructure (ELI) is currently being installed in several European countries aiming to provide unique user facilities with beyond state-of-the-art laser systems. The attosecond facility ELI-ALPS in Szeged, for example, will host several laser systems that will be used for attosecond pulse generation at unprecedented pulse parameters (energy and repetition rate). One of these laser systems is the HR1 (high repetition rate) laser that targets pulse parameters of 1mJ, 6fs pulses at 100kHz repetition rate (100W average power) and with CEP stable operation in its first implementation phase.
We report on a multi-sensor system for the parallel in-situ monitoring of cell nutrients, metabolites and cell mass in biotechnological processes. The integration of enzyme sensors and impedance spectroscopy on one ch...
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We report on a multi-sensor system for the parallel in-situ monitoring of cell nutrients, metabolites and cell mass in biotechnological processes. The integration of enzyme sensors and impedance spectroscopy on one chip for applications in bioreactors is demonstrated for the first time to our best knowledge. Measurements of glucose and lactate concentrations in a wide range are shown with linear ranges up to 600 mM and 900 mM, respectively. The glucose and cell mass sensor in parallel are successfully employed in a cell culture of Saccharomyces cerevisiae to monitor glucose consumption and increasing mass of the cells.
This paper reports on the work of the CIGRÉ C6.22 Working Group, Microgrid Evolution Roadmap, which has recently finalized its first Technical Brochure. The Working Group was asked to identify the main elements r...
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Software evolution produces large amounts of data which software engineers need to understand for their daily activities. The use of software visualization constitutes a promising approach to help them comprehend mult...
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