informatik-vortraege Juni 2024

informatik-vortraege@lists.rwth-aachen.de

5 Teilnehmer
5 Diskussionen

Einladung Informatik-Oberseminar Dr. Simon Völker, 26. Juni 2024, 13:00 Uhr

von Völker, Simon

+********************************************************************** * * * Einladung * * * * Informatik-Oberseminar * * * +********************************************************************** Zeit: Mittwoch, 26. Juni 2024, 13:00 Uhr Ort: Raum 9222, E3, Informatikzentrum Referent: Dr. Simon Völker Lehrstuhl Informatik 10, Studiencenter Informatik Thema: Beyond Touch: Enriching the Interaction with Mobile Devices Abstract: Mobile devices like smartphones and tablets are now the most common digital tools in daily life, aiding in both work and personal tasks. Much of their success stems from their intuitive touchscreen interaction, which allows users to engage with any digital content by simply touching the screen. However, despite their success, touch input has several limitations and drawbacks. It reduces the extensive input capabilities of our hands to mostly a single touchpoint on a 2D surface, lacking additional information such as the force or orientation of the touch, or extra keys like the multiple modifier buttons found on a mouse or keyboard. These limitations slow down interaction and present numerous challenges, negatively affecting usability. Additional issues such as the fat-finger problem and limited reachability further add to the inconveniences. While the input capabilities are sufficient for simple applications, more complex tasks requiring intensive or intricate input, such as large-scale text editing, are still cumbersome and often avoided. In this thesis, I aim to present several approaches that explore, design, prototype, and analyze new techniques to enrich and expand the limited interaction methods on mobile devices. The goal is to empower users to utilize their movement and sensing capabilities in a more meaningful way, beyond simply creating basic touch input on a sheet of glass. I achieve this by focusing on three approaches: 1) Improving touch input on the device itself by incorporating additional properties of the user's hand, such as the force of a touchpoint. I utilize this additional input dimension to create new interaction techniques and to address existing issues, such as the reachability on a device or the lack of shortcuts on touchscreens. 2) Combining touch with other input methods, such as the user's head or eye movements, to overcome the inherent limitations of touch input. 3) Utilizing the sensing capabilities of mobile devices to detect their surroundings to enable other objects around the device to serve as additional input devices that enable new use cases for mobile devices. My habilitation thesis thus contributes a series of new interaction techniques, implemented and evaluated in lab experiments and user studies, that use touch force sensing, head and gaze input, and objects in the surrounding environment, to make mobile touch input more expressive and effective. Es laden ein: die Dozentinnen und Dozenten der Informatik

6 Tage, 22 Stunden

Einladung: Informatik-Oberseminar Andrea Bönsch

von Office VR

+********************************************************************** * * * Einladung * * * * Informatik-Oberseminar * * * +********************************************************************** Zeit: Mittwoch, 26. Juni 2024, 10.00 Uhr Ort: Seminarraum 003, IT Center, Kopernikusstraße 6 Referentin: Andrea Bönsch, M.Sc. Lehr- und Forschungsgebiet Virtuelle Realität und Immersive Visualisierung (LuFG i12) und IT Center Thema: Social Wayfinding Strategies to Explore Immersive Virtual Environments Abstract: To create Immersive Virtual Environments (IVEs) representing believable and appealing urban spaces, high-quality architectural reconstructions alone are insufficient. Instead, these reconstructions need to be complemented by embedding Virtual Agents (VAs). These computer-controlled, anthropomorphic characters breathe life into the scene, either by actively functioning as direct interaction partners or by passively enlivening the IVEs, e.g., as virtual pedestrians. Regardless of the VAs' roles, user engagement in unfamiliar IVEs primarily revolves around scene exploration to facilitate successful navigation and interaction within the scene. The involved wayfinding procedure --- encompassing users' understanding of their surroundings, route planning, and informed decision-making --- is profoundly grounded in a social context where the presence and behavior of others, in our case, the embedded VAs, influence the user. The core contribution of this thesis is, thus, to enhance our understanding of wayfinding as a social activity in Virtual Reality (VR) applications. We achieved this through the optimization of user support during scene exploration by strategically integrating VAs as inherent components within IVEs. Thereby, we undertake a three-fold approach: Firstly, by adopting a theoretical approach we develop a user-centered wayfinding taxonomy categorizing diverse wayfinding strategies in VR. Within this taxonomy, we introduce VAs as novel wayfinding support, distinguishing between strong social wayfinding (direct guidance by VAs) and weak social wayfinding (subtle VA influence on navigation decisions). This conceptual framework facilitates a deeper understanding of how users interact within IVEs. Secondly, we enhance the spatial behavior of VAs for improved user experience during collaborative navigation. Through ecologically valid VR-based user studies, we uncover nuanced user preferences regarding VA proximity management, behavior during non-interaction periods, and responses to inferred user intents. These findings inform the enhancement of VAs' interactive capabilities displaying responsive and socially compliant behavior for an improved user experience. Lastly, we enable the efficient utilization of VAs as social wayfinding support. Through VR-based user studies, we refine the behavioral design of virtual guides by effectively balancing guidance and the user's autonomous exploration, fostering optimal user-agent interaction during strong social wayfinding. Additionally, we propose a VA design as weak social wayfinding that subtly influences user navigation within IVEs by shaping pedestrian flows, substantiated through empirical validation. Comparative analysis of both approaches in terms of user experience and scene knowledge gain elevates our comprehension of effective VA utilization in immersive environments. In summation, this research contributes to the advancement of VAs as advanced human interfaces, fostering enhanced user acceptance, usability, and perceived social presence within VR environments. Es laden ein: die Dozentinnen und Dozenten der Informatik -- Aleksandra Lukic RWTH Aachen University - Visual Computing Institute - Virtual Reality & Immersive Visualization - Computer Science Department LuFG i12 - IT Center - Computational Science & Engineering Kopernikusstraße 6, 52074 Aachen, Germany Phone +49 241 80-29233 Email office(a)vr.rwth-aachen.de URL www.vr.rwth-aachen.de

1 Woche, 5 Tage

UnRAVeL Survey Lecture - Today!

von Kassing, Jan-Christoph

Dear all, this is a reminder for Christina Büsing's talk with the title "Robust Optimization in Health Care" taking place today (13.06) at 12:30 in the B-IT room 5053.2. Please find the details below --- Abstract --- Health is one of the most important factors for the prosperity and well-being of a society. In recent years, this system is challenged by demographic changes: the elderly population (age 65 and older) will increase, which will result in a higher demand for health care services. Simultaneously the decrease in the fertility rate results in a shrinking number of trained medical staff. In order to keep the high standard of the German health care system, it is crucial to improve on the efficient and effective use of our resources. Planning and organization in these fields are complicated by the uncertain nature of health care processes, e.g., the fluctuating demand, arrival time of patients, emergency patients, durations of a single treatment, length of stay or resource failures. These uncertainties are rarely incorporated in the optimization process, if optimization and mathematical methods are used at all. In this talk, I will present, how we approach such kind of optimization problems and show examples how robust optimization can be used to integrated these uncertainties into the optimization process. ---------------- Part of the programme of the research training group UnRAVeL is a series of lectures on the topics of UnRAVeL’s research thrusts algorithms and complexity, verification, logic and languages, and their application scenarios. Each lecture is given by one of the researchers involved in UnRAVeL. This years topic is "UnRAVeL - New Ideas!". In these lectures, UnRAVeL professors will discuss current research as well as highlight open problems and offer a perspective on potential future directions. All interested doctoral researchers and master students are invited to attend the UnRAVeL lecture series 2024 and engage in discussions with researchers and doctoral students. We are looking forward to seeing you at the lectures. Kind regards, Jan-Christoph for the organisation committee

1 Woche, 6 Tage

Einladung: Informatik-Kolloquium Herr Prof. Dr. Michael Thielscher

von Maaßen, Leany

+********************************************************************** * * * Einladung * * * * Informatik-Kolloquium * * * +********************************************************************** Prof. Dr. Michael Thielscher, University of New South Wales, Sydney Time: Tuesday, June 18, 2024 at 16:00h Place: E3 Rm 9222 Title: Epistemic Reasoning and Planning for AI Systems with General Intelligence Abstract: AI systems exhibit general intelligence when they are capable of understanding new problems and tasks and can solve them without human intervention. In this talk I, will explain the role of epistemic reasoning and planning to increase the range of problems that an AI system can solve when interacting with other AI agents or humans. I will present a simple high-level action description language for multi-agent epistemic planning along with a more expressive language for describing so-called epistemic games to a general problem-solving system. I will discuss how general problem-solving systems can take advantage of Epistemic Strategy Logic (SLK) as a rich formalism for reasoning about multi-agent systems and the strategic behavior of agents with partial observability, and I will touch upon a new project where we apply epistemic reasoning to create digitally embodied AI companions to address the challenge of reducing loneliness. Short Bio: Michael Thielscher is a professor of computer science at UNSW Sydney, where he is also associated with the iCinema Research Centre. He received his Ph.D. and Higher Doctorate (Habilitation) in Computer Science from Darmstadt University in Germany. He has held the positions of associate professor at Dresden University and visiting professor at Toulouse 1 Capitole University. His Habilitation thesis was honoured with the Award for Research Excellence by the alumni of Darmstadt University; he co-authored the system Fluxplayer, the 2006 World Champion at the AAAI General Game Playing Competition; and in 2009 he won a Future Fellowship Award from the Australian Research Council. His research focuses mainly on general problem-solving AI, the foundations of knowledge representation, and the application of knowledge representation and reasoning both to robotics as well as in arts and culture. Es laden ein: die Dozentinnen und Dozenten der Informatik _______________________________ Leany Maaßen RWTH Aachen University Lehrstuhl Informatik 5, LuFG Informatik 5 Prof. Dr. Stefan Decker, Prof. Dr. Matthias Jarke, Prof. Gerhard Lakemeyer Ph.D., JunProf. Dr. Sandra Geisler Ahornstrasse 55 D-52074 Aachen Tel: 0241-80-21509 Fax: 0241-80-22321 E-Mail: maassen(a)dbis.rwth-aachen.de

2 Wochen, 5 Tage

Einladung Informatik-Oberseminar Christian Herold, 12. Juni 2024,

von Stephanie Jansen

********************************************************************** * * * Einladung * * * * Informatik-Oberseminar * * * *********************************************************************** Zeit: Mittwoch, 12. Juni 2024, 09:30 Uhr Ort: Raum 9222, E3, Informatikzentrum Zoom:https://rwth.zoom-x.de/j/68743953886?pwd=HMUlqnO8qakacCpfazBAzKy8b222EK.1 Meeting-ID: 687 4395 3886 Kenncode: 183143 Referent: Christian Herold, M.Sc.; Lehrstuhl Informatik 6 Thema: Context-Aware Neural Machine Translation Abstract: Despite the known limitations, most automatic machine translation (MT) systems today still operate on the sentence-level, ignoring cross-sentence context information. This is, because considering cross-sentence context leads to (i) exponentially increasing complexity, (ii) limits us in terms of the available training data, and (iii) sometimes even reduces translation quality on general MT benchmarks. In this talk, we discuss our efforts to combat these issues and to improve context-aware MT systems. First, we discuss the different decoding strategies for document-level MT and explain how constraining the model attention can result in a more efficient translation system. Second, to tackle the problem of scarce document-level training data, we elaborate on our efforts to utilize monolingual document-level data for MT. Finally, we discuss our efforts on data filtering for MT, which can benefit both sentence- and document-level systems. Es laden ein: die Dozentinnen und Dozenten der Informatik -- Stephanie Jansen Faculty of Mathematics, Computer Science and Natural Sciences Chair of Computer Science 6 ML - Machine Learning and Reasoning RWTH Aachen University Theaterstraße 35-39 D-52062 Aachen Tel: +49 241 80-21601 sek(a)ml.rwth-aachen.de www.hltpr.rwth-aachen.de

3 Wochen, 2 Tage

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