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562 results on '"Madsen, Claus"'

1. Quantum estimation of a time dependent perturbation

Author

Madsen, Claus Normann, Valdetaro, Lia, and Mølmer, Klaus

Subjects
Quantum Physics
Abstract

We analyze the estimation of a time dependent perturbation acting on a continuously monitored quantum system. We describe the temporal fluctuations of the perturbation by a Hidden Markov Model, and we combine quantum measurement theory and classical filter theory into a time evolving hybrid quantum and classical trajectory. The forward-backward analysis that permits smoothed estimates of classical Hidden Markov Models has a counterpart in the theory of retrodiction and Past Quantum States. As a specific example, we apply our hybrid trajectory and Past Quantum State theory to the sensing of a fluctuating magnetic field by microwave interrogation of a single quantum spin., Comment: 8 pages, 4 figures

Published
2021

2. Diplomacy with the United Nations: Preparing for the International Year of Astronomy

Author

Cesarsky, Catherine, Madsen, Claus, ORCHISTON, WAYNE, Series Editor, ROTHENBERG, MARC, Series Editor, CUNNINGHAM, CLIFFORD, Series Editor, EVANS, JAMES, Editorial Board Member, GOSS, MILLER, Editorial Board Member, HAMACHER, DUANE, Editorial Board Member, LEQUEUX, JAMES, Editorial Board Member, MITTON, SIMON, Editorial Board Member, RUGGLES, CLIVE, Editorial Board Member, TRIMBLE, VIRGINIA, Editorial Board Member, WOLFSCHMIDT, GUDRUN, Editorial Board Member, BELL, TRUDY, Editorial Board Member, DEVORKIN, DAVID, Editorial Board Member, Montmerle, Thierry, editor, and Fauque, Danielle, editor

Published
2022
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11. Preliminary Study on the Influence of Visual Cues, Transitional Environments and Tactile Augmentation on the Perception of Scale in VR

Author

Jensen, Tobias Delcour, Kasprzak, Filip, Szekely, Hunor-Gyula, Nikolov, Ivan, Stokholm Høngaard, Jens, Madsen, Claus, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Stephanidis, Constantine, editor, Antona, Margherita, editor, and Ntoa, Stavroula, editor

Published
2020
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22. Benchmarking Close-range Structure from Motion 3D Reconstruction Software Under Varying Capturing Conditions

Author

Nikolov, Ivan, Madsen, Claus, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Weikum, Gerhard, Series Editor, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Ioannides, Marinos, editor, Fink, Eleanor, editor, Moropoulou, Antonia, editor, Hagedorn-Saupe, Monika, editor, Fresa, Antonella, editor, Liestøl, Gunnar, editor, Rajcic, Vlatka, editor, and Grussenmeyer, Pierre, editor

Published
2016
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30. A Comparative Analysis of Architectural Experience in the Reality Continuum Based on Embodiment, Tactility and Affordance

Author

Das, Avishek, Brorson Fich, Lars, and Madsen, Claus Brøndgaard

Abstract

This paper presents a comparative analysis between a physical model, a set of virtual reality (VR) models and a set of augmented reality (AR) models of the same architectural project. A set of architectural participants’ interactions with the models have been recorded through a set of sensor streams and videos and their experiences have been interpreted through a questionnaire containing both qualitative and quantitative questions. Further analysing through the sensor streams, video recording and questionnaire, their experiences have been interpreted using a framework of embodiment, affordance and tactility to determine the usefulness and limitations and each of the modes and their possible application in architectural design practice.

Published
2023

33. Shadow Detection in Dynamic Scenes Using Dense Stereo Information and an Outdoor Illumination Model

Author

Madsen, Claus B., Moeslund, Thomas B., Pal, Amit, Balasubramanian, Shankkar, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Kolb, Andreas, editor, and Koch, Reinhard, editor

Published
2009
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35. Graph Cut Based Segmentation of Soft Shadows for Seamless Removal and Augmentation

Author

Nielsen, Michael, Madsen, Claus B., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ersbøll, Bjarne Kjær, editor, and Pedersen, Kim Steenstrup, editor

Published
2007
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36. Performance Comparison of Techniques for Approximating Image-Based Lighting by Directional Light Sources

Author

Madsen, Claus B., Laursen, Rune E., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ersbøll, Bjarne Kjær, editor, and Pedersen, Kim Steenstrup, editor

Published
2007
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37. Segmentation of Soft Shadows Based on a Daylight- and Penumbra Model

Author

Nielsen, Michael, Madsen, Claus B, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Gagalowicz, André, editor, and Philips, Wilfried, editor

Published
2007
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40. Democratizing Mobilities Design Tools Using VR

Author

Siso, Ivan David Tovar Siso, Jensen, Kasper Amstrup, Eriksen, Stefan Nordborg, and Madsen, Claus Brøndgaard

Subjects
Mobilities Design, Real-time Simulations, Computer Graphics, Virtual Reality, Behaviour Trees, Crowd Simulation, Interaction Design
Abstract

In collaboration with Metroselskabet in Copenhagen, Denmark, this project is an exploration of how virtual reality can support urban designers in visualizing crowd flow in Nørreport Metro Station. The aim was to visualize the simulated effects of rearranging the placement of electronic ticket validators. Four elements form the core of the prototype. First, crowd simulation using Unity's NavMesh system, with agents driven by behavior trees. Second, VR technology to support an immersive and interactive experience. Third, a virtual environment based on Nørreport Metro Station. Fourth, a logging system so that data could be extracted from the simulated crowd flow, enabling further analysis by users. The project was evaluated on five participants, consisting of an expert heuristic evaluation along with cybersickness and presence questionnaires. Results showed great promise, and through multiple iterations the project was considered to be sufficient as a design tool for urban metro design.

Published
2022
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47. Discussion

Author

Andersen, P. Bøgh, Madsen, Claus B., Granum, Erik, and Qvortrup, Lars, editor

Published
2001
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48. Evaluating Immersive Animation Authoring in an Industrial VR Training Context

Author

Gaarsdal, Jesper, Wolff, Sune, and Madsen, Claus Brøndgaard

Subjects
Industrial Applications, authoring tools, Virtual Reality, Animation
Abstract

An important aspect of a Virtual Reality (VR) training application is animation, as animations can be used to presentbehavior and intent, and make the virtual space feel more alive and immersive. In existing VR applications and in theliterature, several animation authoring solutions exist that enable users to create animations directly in VR. These solutions,however, typically aim to recreate the animation tools found in traditional 3D animation software, which are complex andknown for their steep learning curves. For an industrial subject matter expert creating a virtual training space, an immersiveanimation tool should require little to no time to learn while still enabling users to solve common animation tasks such assimple 3D object animation. Few such tools exist, and little research has been done on animation authoring in an industrial VR context. In this paper, we present a mixed methods user study with seven participants including industrial subject matter experts. The participants were asked to complete three animation tasks using an immersive animation authoring tool developed for this study, followed by post-task questionnaires and a semi-structured expert interview. Thematic analysis of the interview and observation data, supported by the subjective measurements, revealed that industrial end users without animation experience found the animation tool both intuitive and easy to learn. The analysis also gave insights into the major challenges faced by non-animators when using the tool as well as possible solutions.

Published
2022

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