We present a novel vertically-coupled active-passive integration architecture that provides an order of magnitude reduction in coupling coefficient variation between misaligned waveguides when compared with a conventi...
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Container terminals have to cope with complex demands, which require a suitable terminal layout connected with proper management strategies. This paper introduces a simulation system for terminal layout optimization a...
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System integration is becoming ever more important in the design and implementation of power electronics. In this paper, system integration is considered and a definition is presented. Based on the definition, the int...
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System integration is becoming ever more important in the design and implementation of power electronics. In this paper, system integration is considered and a definition is presented. Based on the definition, the interdependence of the electrical, the thermal and the spatial design of a system are considered and identified. These interdependencies provide the means to manipulate a system design so that all the specifications (electrical, thermal and spatial) can be satisfied simultaneously by the system. Two case studies, both automotive in nature are presented to illustrate the system integration concept. The first is an integrated system module implementing a high power density 14 V/42 V DC/DC converter and the second is an integrated drive for hybrid vehicles, both implemented with high temperature cooling. Practical results are presented
This paper describes a new sensor application that provides measuring the pressure in abdominal aorta aneurisms (AAA). Using a foldable prosthesis to treat AAA, leakages can occur. Therefore, we invented a batteryless...
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This paper describes a new sensor application that provides measuring the pressure in abdominal aorta aneurisms (AAA). Using a foldable prosthesis to treat AAA, leakages can occur. Therefore, we invented a batteryless telemetric pressure monitoring system for the detection of these leakages. The system consists of an implantable capsule and an external reader station. A capacitive pressure sensor and a ferrite based micro coil is integrated in the capsule. First in-vitro tests show a transmission range of up to 120 mm.
In order to infer intent from gesture, a broad classification of types of gestures into five main classes is introduced. The classification is intended as a generally applicable basis for incorporating the understandi...
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In order to infer intent from gesture, a broad classification of types of gestures into five main classes is introduced. The classification is intended as a generally applicable basis for incorporating the understanding of gesture into human-robot interaction (HRI). Examples from human-robot interaction show the need to take into account not only the kinematics of gesture, but also the interactional context. Requirements for the operational classification of gesture by a robot interacting with humans are suggested and initial steps in its deployment are discussed.
Manipulating in the micro- or even nano world still poses a great challenge to robotics. Conventional (stationary) systems suffer from drawbacks regarding integration into process supervision and multi-robot approache...
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Manipulating in the micro- or even nano world still poses a great challenge to robotics. Conventional (stationary) systems suffer from drawbacks regarding integration into process supervision and multi-robot approaches, which become highly relevant to fight scaling effects. This paper describes work currently being carried out which aims to make automated manipulation of micrometer-scaled objects possible by robots with nanometer precision. The goal is to establish a small cluster of (up to five) micro robots equipped with on-board electronics, sensors and wireless power supply. Power autonomy has been reached using inductive energy transmission from an external wireless power supply system or a battery based system. Electronics requirements are fulfilled in the electronic module with the full custom integrated circuit design for the robot locomotion control and the closed loop force control for AFM tool in cell manipulation applications. The maximum velocity obtained is about 0.4 mm/s with a saw tooth voltage signals of 20Vpp and 2500 Hz. In order to keep a AFM tool on micro-robot a specific tip with integrated piezoresistance, instead of the classical laser beam methodology, is validated for force measurement.
We report here experimental results on laser ablation of metals in air and in vacuum in similar irradiation conditions. The experiments revealed that the ablation thresholds in air are less than half those measured in...
We report here experimental results on laser ablation of metals in air and in vacuum in similar irradiation conditions. The experiments revealed that the ablation thresholds in air are less than half those measured in vacuum. Our analysis shows that this difference is caused by the existence of a long-lived transient nonequilibrium surface state at the solid-vacuum interface. The energy distribution of atoms at the surface is Maxwellian-like but with its high-energy tail truncated at the binding energy. We find that in vacuum the time needed for energy transfer from the bulk to the surface layer to build the high-energy tail, exceeds other characteristic timescales such as the electron-ion temperature equilibration time and surface cooling time. This prohibits thermal evaporation in vacuum for which the high-energy tail is essential. In air, however, collisions between the gas atoms and the surface markedly reduce the lifetime of this nonequilibrium surface state allowing thermal evaporation to proceed before the surface cools. We find, therefore, that the threshold in vacuum corresponds to nonequilibrium ablation during the pulse, while thermal evaporation after the pulse is responsible for the lower ablation threshold observed in air. This paper provides direct experimental evidence of how the transient surface effects may strongly affect the onset and rate of a solid-gas phase transition.
Service-oriented computing, which offers more flexible means for application development, is gaining popularity. Service-oriented grid applications are constructed by selecting and composing appropriate services. They...
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Echo State Networks (ESNs) use a recurrent artificial neural network as a reservoir. Finding a good one depends on choosing the right parameters for the generation of the reservoir, intuition and luck. The method prop...
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Active microring optical devices are promising candidates for use in next generation optical signal processing and sensor products. In this design, an InP based microring laser is vertically coupled to a passive feedi...
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