Papers by Hans Christian Bolstad
D6.8 Dissemination report I
MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy device... more MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy devices, specifically by developing a Power Take-off unit able to increase the output from the few 100 kW range to a full 1 MW range. The project will generate extensive know-how in the area of PTO design and control systems, with the aim to decrease the levelized cost of energy (LCOE) of next-generation OWSC devices.<br> The purpose of this dissemination report is to outline the dissemination activities that have taken place in the consortium since project start and how this relates the activities set out in the corresponding dissemination plan. This document therefore contains the original plan (D6.2) as well as the report on the activities taken place in the first 18 Months.<br> Dissemination activities are done in order to maximize the impact, take-up, visibility, and credibility of the project. This plan addresses the purpose of dissemination, what has and will be disseminated to whom, how and when.<br> The findings from the project are disseminated to relevant stakeholders throughout the duration of the project. Dissemination takes place using both traditional channels (publications and conferences) but also in dedicated workshops and scientific meetings, such as in side-events in order to increase the impact of the project.<br> There is a strong link between the communication and the dissemination activities in any H2020 project. The communication report will, therefore, be linked and for certain activities – overlap in purpose and content with this dissemination report.
Optimization of phase-only computer-generated holograms using an ion-exchange process
Optical Engineering, 1992
A highly efficient phase-only hologram has been produced using an ion-exchange method. An optimum... more A highly efficient phase-only hologram has been produced using an ion-exchange method. An optimum condition for the phase profile of the hologram is described. The ion density and the phase profile generated by the ion exchange were calculated by computer simulations. The diffraction patterns of different gratings are calculated based on these data, and an optimum phase distribution is estimated. The optimum condition has been verified experimentally.
MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy device... more MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy devices, specifically by developing a Power Take-off unit able to increase the output from the few 100 kW range to a full 1 MW range. The project will generate extensive know-how in the area of PTO design and control systems, with the aim to decrease the levelized cost of energy (LCOE) of next-generation OWSC devices.<br> The purpose of this dissemination report is to outline the dissemination activities that have taken place in the consortium since project start and how this relates the activities set out in the corresponding dissemination plan. This document therefore contains the original plan (D6.2) as well as the report on the activities taken place in the first 18 Months.<br> Dissemination activities are done in order to maximize the impact, take-up, visibility, and credibility of the project. This plan addresses the purpose of dissemination, what has and will be disseminated...
MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy device... more MegaRoller is a Horizon 2020 project focusing on how to improve European Ocean Wave Energy devices, specifically by developing a Power Take-off unit able to increase the output from the few 100 kW range to a full 1 MW range. The project has generated extensive know-how in the area of PTO design and control systems and contributed to the decrease of levelized cost of energy (LCOE) of next-generation OWSC devices. The purpose of this final dissemination report is to outline the dissemination activities that have taken place in the consortium during the project and the activities set out in the corresponding dissemination plan. This document therefore contains the original plan (D6.2) as well as the report on the activities taken place in the duration of the project from May 2018 (Dissemination report I) to the final month in December 2021 covered by this report. Dissemination activities are done in order to maximize the impact, take-up, visibility, and credibility of the project. This...
EU wants to improve the way how we find, recognize, use and exploit innovations created inside co... more EU wants to improve the way how we find, recognize, use and exploit innovations created inside co-operative EU-projects. One way of improving this outcome is to have high awareness of any and all new innovations being created. This way one can improve greatly the potential outcome of an EU-project and in addition create more business opportunities inside the EU. One EU definition of innovation management is: "Overall management of all activities" and another is "Processes to develop new products and services which satisfy needs". Innovation management allows the organization to respond to external or internal opportunities, and use its creativity to introduce new ideas, processes or products. A way to increase awareness at all levels in MegaRoller is therefore to build – right from the beginning of the project - an innovation management plan, which lasts throughout the project. To keep this ongoing and updated the Innovation Manager – who is overseeing the innova...
Detection of virtual toll stations in a GNSS System
Measurement campaigns with continuous-wave Doppler Lidars (Light detection and ranging) developed... more Measurement campaigns with continuous-wave Doppler Lidars (Light detection and ranging) developed at DTU Wind Energy in Denmark were performed in two very different wind tunnels. Firstly, a measurement campaign in a small icing wind tunnel chamber at VTT in Finland was performed with high frequency measurements for increasing the understanding of the effect of in-cloud icing conditions on Lidar signal dynamics. Secondly, a measurement campaign in the relatively large boundary-layer wind tunnel at NTNU in Norway was performed in the wake of a scaled test turbine in the same configuration as previously used in blind test comparisons for wind turbine wake modelers. These Lidar measurement activities constitute the Joint Experiment Project” L4WT - Lidars for Wind Tunnels, with applications to wakes and atmospheric icing in a prospective Nordic Network” with the aim of gaining and sharing knowledge about possibilities and limitations with lidar instrumentation in wind tunnels, which was ...
Journal of Physics: Conference Series
To cope with a large-scale introduction of renewables into power systems, it is important to unde... more To cope with a large-scale introduction of renewables into power systems, it is important to understand the reduction of variability in the aggregated generation or the socalled smoothing effect. Knowledge of the degree of smoothing is used for assessing the potential impact of intermittent generation on the power system operation. Here, smoothing effects of aggregated wind power are assessed around Trondheim, Norway, by applying a recently proposed smoothing index based on the so-called Koopman Mode Decomposition (KMD). The method is shown to effectively decompose complex time-series of wind power outputs into a finite number of modes, each of which oscillates with a single frequency for all locations (or hypothetical wind farms). It is shown that the method is able to reconstruct the original power outputs well by only a small number of modes that retain the variability of the original time-series, and is able to provide a relevant quantification of the smoothing effects for each individual frequency (or mode).
Users may download and print one copy of any publication from the public portal for the purpose... more Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.
Virtuelle Gantry-Erkennung in einem GNSS-System
Digital
The technological leap of smart technologies and the Internet of Things has advanced the conventi... more The technological leap of smart technologies and the Internet of Things has advanced the conventional model of the electrical power and energy systems into a new digital era, widely known as the Smart Grid. The advent of Smart Grids provides multiple benefits, such as self-monitoring, self-healing and pervasive control. However, it also raises crucial cybersecurity and privacy concerns that can lead to devastating consequences, including cascading effects with other critical infrastructures or even fatal accidents. This paper introduces a novel architecture, which will increase the Smart Grid resiliency, taking full advantage of the Software-Defined Networking (SDN) technology. The proposed architecture called SDN-microSENSE architecture consists of three main tiers: (a) Risk assessment, (b) intrusion detection and correlation and (c) self-healing. The first tier is responsible for evaluating dynamically the risk level of each Smart Grid asset. The second tier undertakes to detect a...
Digital, Sep 30, 2021
The technological leap of smart technologies and the Internet of Things has advanced the conventi... more The technological leap of smart technologies and the Internet of Things has advanced the conventional model of the electrical power and energy systems into a new digital era, widely known as the Smart Grid. The advent of Smart Grids provides multiple benefits, such as self-monitoring, self-healing and pervasive control. However, it also raises crucial cybersecurity and privacy concerns that can lead to devastating consequences, including cascading effects with other critical infrastructures or even fatal accidents. This paper introduces a novel architecture, which will increase the Smart Grid resiliency, taking full advantage of the Software-Defined Networking (SDN) technology. The proposed architecture called SDN-microSENSE architecture consists of three main tiers: (a) Risk assessment, (b) intrusion detection and correlation and (c) self-healing. The first tier is responsible for evaluating dynamically the risk level of each Smart Grid asset. The second tier undertakes to detect and correlate security events and, finally, the last tier mitigates the potential threats, ensuring in parallel the normal operation of the Smart Grid. It is noteworthy that all tiers of the SDN-microSENSE architecture interact with the SDN controller either for detecting or mitigating intrusions.
Quality of dirty: A decision making assessment methodology for automatic license plate recognition under dirtied conditions
2014 IEEE International Conference on Image Processing (ICIP), 2014
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Papers by Hans Christian Bolstad