December 2023 - Cix-all - lists.saarland-informatics-campus.de

[HCI-Stammtisch] Talk and visitor: Christoph A. Johns, PhD@Aarhus University
by Anna Maria Feit 05 Jan '24

05 Jan '24

Dear all, * * Christoph Johns is a PhD student at Aarhus University who has been collaborating with my group throughout the last year on the topic of multi-objective UI adaptation. He will be visiting us during two weeks in January to intensifiy our collaborations and get to know the HCI ressearchers in Saarbrücken. Christoph will give an overview over his PhD research on *9th of January at 10 AM, in Room 001 E1.7. *Details below*. * Since he'll be with us for two weeks, please reach out to him directly to arrange individual meetings with him during his stay if you're interested in his work. Best Anna ================================================ *Title:* User Interface Adaptation under Uncertainty *Abstract* Computational interaction design has emerged as an effective approach for the design and adaptation of user interfaces (UIs). Model-based optimization, in particular, has been successfully employed across diverse application domains, ranging from keyboard layout optimization to graphic design inspiration and real-time 3D UI placement. It combines formal descriptions of interaction cost and utility with established optimization methods to identify UI configurations that are expected to fit their context of use. Most commonly, model-based optimization is used to tailor a UI’s configuration to situational or personal needs. However, due to the complex nature of both individuals and situations, the models that express the goodness of a potential design can only approximate the relevant contextual conditions—whether that is the state of the environment or the user’s goals regarding the use of the UI. As the number and complexity of relevant contextual dimensions grow, it thus becomes increasingly difficult to assess the quality of a potential adaptation with regard to the actual design goals and to consistently generate high-quality adaptations in turn. To combat this issue, my PhD project explores changes to the mathematical formulation of the UI adaptation problem to create more robust and flexible adaptive systems. In this talk, I will present some background on context-aware and optimization-based adaptive user interfaces, my investigations into semi-automatic 3D UI placement, and give some indications for future directions that can progress toward more usable context-aware adaptive systems. *Bio* Christoph A. Johns is a second-year PhD student from the Ubiquitous Computing and Collaborative Computer-Human Interaction groups at Aarhus University. He is co-supervised by Clemens Klokmose and Ken Pfeuffer and researches adaptive user interfaces. His primary interest lies in user interface adaptation under uncertainty; that is, automatic (re-)configuration of the appearance or behavior of a user interface on the basis of incomplete, inaccurate, or otherwise imperfect information about its usage context. His first research on the topic was published at CHI 2023 and UIST 2023. Before coming to Aarhus University, Christoph completed a MSc (Double Degree) in Human-Computer Interaction and Design at KTH Royal Institute of Technology and Aalto University, a BSc in Business Information Systems at University of Göttingen, and a dual-study BA in Business Administration at WelfenAkademie Braunschweig and Volkswagen Financial Services. -- Professor of Computer Science at Saarland University Saarland Informatics Campus E1 7, R3.09 Computational Interaction Group https://cix.cs.uni-saarland.de/ _______________________________________________ HCI-Stammtisch mailing list HCI-Stammtisch(a)dfki.de https://www.dfki.de/mailman/cgi-bin/listinfo/hci-stammtisch

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Student Seminar
by Marie Mühlhaus 11 Dec '23

11 Dec '23

Hi all, We will have a student presentation upcoming Wednesday (13.12.2023) at 1:30 pm (not 1:00 pm!). Awni Alkader will be presenting his final Bachelor thesis talk. You can find the thesis title and abstract below. The presentation will take place in E1.7, room 001. Best regards, Marie ------------------------------------------------------ Title: Comparison of steering techniques for seated walking in place type virtual locomotion interfaces Abstract: Virtual reality (VR) has become very significant in recent years in technology development, helping users to have an immersive and more realistic experience while interacting with virtual worlds. Locomotion is one of the most important aspects when using VR technology, which allows users to navigate, move around, jump, crawl, etc. within VR environments to perform the needed tasks. The most used locomotion methods are those with joystick-based or teleportation. The joystick-based ones cause motion sickness and teleportation is missing spatial awareness. Furthermore, we also have other methods like treadmills and walking-in-place (WIP). Treadmills are too expensive and beyond the user’s budget while WIP is considered the less one causing motion sickness. With WIP, we try to imitate the natural way we walk in real life. WIP has two postural interfaces: seated and standing. In this thesis, we focused on seated WIP interfaces as it is helpful for many users, especially the elderly or physically disabled individuals since they are unable to use many other methods. Moreover, it requires less space and provides a safer and more stable experience. There are several methods that can be used for steering in seated interfaces like the joystick, upper body titling, or swivel chair. Nevertheless, due to limitations in some of the seated systems, we can not turn physically to steer the viewpoint of the avatar, which is one of the reasons why steering methods are essential. In this work, we implemented and compared four steering techniques for seated WIP virtual locomotion interfaces, namely Upper-body Leaning, Swivel Chair, Joystick, and Foot-swiping. We conducted a triangle completion test experiment where three circles were shown, via the head-mounted display, on each angle of the triangle. The users were asked to walk through these circles and every time they entered a circle, this circle disappeared. By entering the last circle, they needed to guess where the first circle was and walk to it. Then, we compared these methods based on the following metrics: Simulator Motion Sickness, NASA Task Load Index (NASA-TLX), the orientation of the walk, preference, the distance from the 3rd circle, and task completion time. We administered the Simulator Sickness Questionnaire to the participants to quantify the motion sickness they experienced and asked them to fill out the NASA-TLX questionnaire to assess the mental workload (MWL). Even though the participants chose the Swivel Chair method as the most preferred method (7 out of 10), our results did not a statistically significant difference between our methods in terms of motion sickness, the orientation of the walk, task completion time, and the distance from the 3rd circle. However, the results showed a statistically significant difference in Physical Demand and Frustration. We found that Foot-swiping required more Physical Demand than Swivel Chair and Upper-body Leaning was more frustrating than Swivel Chair.

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Fwd: Invitation Niko-Fete / Winter Party 2023-12-06 (Students' Representative Council)
by Anna Feit 01 Dec '23

01 Dec '23

The student council is inviting everyone to their Nikolas party. See below. This is a great opportunity to get in touch a bit with the student life here, in particular for the non-students in the group :) -------- Weitergeleitete Nachricht -------- BETREFF: Niko-Fete / Winter Party 2023-12-06 DATUM: Thu, 30 Nov 2023 20:50:48 +0100 VON: ORGANISATION: Students' Representative Council Computer Science AN: Saarländisch Fassung drunner English version below ------------------------------------------------------- Sehr geehrte Professorinnen und Professoren, liebe Mitarbeiterinnen und Mitarbeiter, im Namen des Fachschaftsrates laden wir Sie herzlich zu unserer "Niko-Fete", unserer traditionellen Nikolausfeier, am Mittwoch, dem 06. Dezember, ab 10 Uhr ein. Neben Glühwein, Kakao und alkoholfreiem Punsch bieten wir auch dieses Jahr selbstgemachte Waffeln und Crêpes und süße Knabbereien, viel Weihnachtsmusik und Vorweihnachtsstimmung an. Wie immer ist das alles natürlich kostenlos. Nichtsdestotrotz freuen wir uns an diesem Tag über eine kleine _Spende_, die einem _guten Zweck_ dienen wird. Ihre Spenden werden zu 100 Prozent der _Saarbrücker Tafel und dem Saarbrücker Kältebus_ zu Gute kommen. Wir freuen uns auf Ihr Kommen und sehen uns am 06. Dezember. Ihr Fachschaftsrat Informatikstudiengänge === Saarländisch Fassung === Sehr jeehrte Proffessorinne unn Professore, liewe Midabeiderinne unn Midabeider, im Nome vum Fachschftsrot wollde ma eisch herzlischsd zu unsra Niggelosfeier, am Mittwoch, de 06.12. ab 10 Uhr innlode. Newem Gliehwein, Schoggolad unn ah ebbes ohne Algohol (so e Punsch) gebt's Dissjohr widder selbschdjemachde Waffele, Crébb unn Schnääges, vill Weihnachdsmusigg unn Feetz. Nadierlisch koscht das alles gor NIX. Awa mia würde uns an demm Dah üwwer e _klenni Spent_ freie, die nem gudde Zweck diene soll. Eier Spenne werre hunnartprozendisch an die _Dafel unn de Käldebus in Saarbrigge_ weidergenn. Mia freie uns uff eich unn siehn uns am 06. Dezember. Eier Fachschftsrot Informadigschdudiegäng === English Version === Dear Professors and Dear staff, on behalf of the Students Representatives Council we invite you to our "Niko-Fete", our traditional Christmas party, on Wednesday, December 06th, from 10am. We offer hot drinks, crêpes, waffles, Christmas music and a lot of fun. Everything is of course for FREE. Nevertheless, we really appreciate a _small donation to a good cause_. Your donations will be given to the _Tafel Saarbrücken (food bank) and the Kältebus Saarbrücken (shelter for homeless people)_. We are looking forward to seeing you on December 06. Your Students Representatives Council

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Student Seminar
by Marie Mühlhaus 01 Dec '23

01 Dec '23

Hi all, We will have a student presentation upcoming Wednesday (06.12.2023) at 1:00 pm. Anwesha Das will be presenting her final Master thesis talk. You can find the thesis title and abstract below. The presentation will take place in E1.7, room 001. Best regards, Marie ------------------------------------------------------ Title: Impact of Visual Adaptation of Interfaces on users’ Attention in presence of Cognitive Load Abstract: User interfaces (UIs) heavily rely on visual cues to guide attention, yet the interplay between visual highlighting and users' cognitive load due to limited attentional capacity remains unexplored. This thesis investigates permanent and dynamic visual highlighting alongside cognitive load's impact on gaze behaviour. We collect eye movement data from 27 participants, each looking at 150 webpages. Our findings revealed a nuanced but interesting relationship: As cognitive load increases, users' ability to attend to diverse UI elements diminish -- dynamic visual highlighting, however, remains a resilient attention-capturing technique. The presence of visual highlighting and cognitive load significantly changes the areas that users attend to - reshaping saliency of the overall webpage image. This thesis, contributes a first-of-its-kind gaze dataset and empirical insights about the joint impact of visual highlighting and cognitive load on user attention. We employed Generalized Linear Mixed Models (GLMMs) to disentangle the effects of these controlled for variables from confounding factors like individual differences, etc. These insights deepen our understanding of users' attention allocation processes in web UIs, especially in real-world multitasking contexts. This thesis lays the groundwork for future research and predictive models on user attention dynamics which account for users' cognitive states.

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