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Displaying 1-34 out of 34 total
The Clash between Privacy and Automation in Social Media
Found in: IEEE Pervasive Computing
By Sami Vihavainen,Airi Lampinen,Antti Oulasvirta,Suvi Silfverberg,Asko Lehmuskallio
Issue Date:January 2014
pp. 56-63
Classic research on human factors has found that automation never fully eliminates the human operator from the loop. Instead, it shifts the operator's responsibilities to the machine and changes the operator's control demands, sometimes with adverse conseq...
 
An Edge-Bundling Layout for Interactive Parallel Coordinates
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Gregorio Palmas,Myroslav Bachynskyi,Antti Oulasvirta,Hans Peter Seidel,Tino Weinkauf
Issue Date:March 2014
pp. 57-64
Parallel Coordinates is an often used visualization method for multidimensional data sets. Its main challenges for large data sets are visual clutter and over plotting which hamper the recognition of patterns in the data. We present an edge-bundling method...
 
Interactive Markerless Articulated Hand Motion Tracking Using RGB and Depth Data
Found in: 2013 IEEE International Conference on Computer Vision (ICCV)
By Srinath Sridhar,Antti Oulasvirta,Christian Theobalt
Issue Date:December 2013
pp. 2456-2463
Tracking the articulated 3D motion of the hand has important applications, for example, in human-computer interaction and teleoperation. We present a novel method that can capture a broad range of articulated hand motions at interactive rates. Our hybrid a...
 
Rethinking Experimental Designs for Field Evaluations
Found in: IEEE Pervasive Computing
By Antti Oulasvirta
Issue Date:October 2012
pp. 60-67
Laboratory-based usability evaluations are often inadequate for the post-desktop-computer era. Field studies challenge us to design evaluations as quasi-experiments that don't assume perfect control and randomization. Such evaluations are expensive, but th...
 
Towards Socially Aware Pervasive Computing: A Turntaking Approach
Found in: Pervasive Computing and Communications, IEEE International Conference on
By Esko Kurvinen, Antti Oulasvirta
Issue Date:March 2004
pp. 346
Social context is an important yet an under-researched area in context-sensitive computing. This paper adopts a framework from social sciences that views social context as a sequence of turns taken between participants. The approach is illustrated and eval...
 
MovExp: A Versatile Visualization Tool for Human-Computer Interaction Studies with 3D Performance and Biomechanical Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Gregorio Palmas,Myroslav Bachynskyi,Antti Oulasvirta,Hans-Peter Seidel,Tino Weinkauf
Issue Date:February 2015
pp. 1
In Human-Computer Interaction (HCI), experts seek to evaluate and compare the performance and ergonomics of user interfaces. Recently, a novel cost-efficient method for estimating physical ergonomics and performance has been introduced to HCI. It is based ...
 
Dynamic tactile guidance for visual search tasks
Found in: Proceedings of the 25th annual ACM symposium on User interface software and technology (UIST '12)
By Antti Oulasvirta, Antti Salovaara, Petteri Nurmi, Ville Lehtinen
Issue Date:October 2012
pp. 445-452
Visual search in large real-world scenes is both time consuming and frustrating, because the search becomes serial when items are visually similar. Tactile guidance techniques can facilitate search by allowing visual attention to focus on a subregion of th...
     
How real is real enough? optimal reality sampling for fast recognition of mobile imagery
Found in: ACM Transactions on Applied Perception (TAP)
By Antti Nurminen, Antti Oulasvirta, Tiia Suomalainen
Issue Date:October 2012
pp. 1-18
We present the first study to discover optimal reality sampling for mobile imagery. In particular, we identify the minimum information required for fast recognition of images of directly perceivable real-world buildings displayed on a mobile device. Resolu...
     
On the move, wirelessly connected to the world
Found in: Communications of the ACM
By Antti Nurminen, Antti Oulasvirta, Matthias Baldauf, Peter Frohlich
Issue Date:January 2011
pp. 132-138
How to experience real-world landmarks through a wave, gaze, location coordinates, or touch, prompting delivery of useful digital information.
     
It's Mine, Don't Touch!: interactions at a large multi-touch display in a city centre
Found in: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems (CHI '08)
By Antti Oulasvirta, Antti Salovaara, Esko Kurvinen, Giulio Jacucci, John Evans, Peter Peltonen, Petri Saarikko, Tommi Ilmonen
Issue Date:April 2008
pp. 49-54
We present data from detailed observations of CityWall, a large multi-touch display installed in a central location in Helsinki, Finland. During eight days of installation, 1199 persons interacted with the system in various social configurations. Videos of...
     
Comedia: mobile group media for active spectatorship
Found in: Proceedings of the SIGCHI conference on Human factors in computing systems (CHI '07)
By Antti Oulasvirta, Antti Salovaara, Giulio Jacucci, John Evans, Tommi Ilmonen
Issue Date:April 2007
pp. 1273-1282
Previous attempts to support spectators at large-scale events have concentrated separately on real-time event information, awareness cues, or media-sharing applications. CoMedia combines a group media space with event information and integrates reusable aw...
     
InfoRadar: demonstrating how context helps mobile people interact
Found in: Proceedings of the third Nordic conference on Human-computer interaction (NordiCHI '04)
By Antti Nurminen, Antti Oulasvirta, Jan Blom, Matti Rantanen
Issue Date:October 2004
pp. 461-462
InfoRadar is a personal, context-aware mobile device. It enables people to share opinions and discuss topics related to places. In addition to messaging, InfoRadar supports voting on user-defined subjects. The UI is based on a radar representation providin...
     
Six modes of proactive resource management: a user-centric typology for proactive behaviors
Found in: Proceedings of the third Nordic conference on Human-computer interaction (NordiCHI '04)
By Antti Oulasvirta, Antti Salovaara
Issue Date:October 2004
pp. 57-60
Proactivity has recently arisen as one of the focus areas within HCI. Proactive systems adhere to two premises: 1) working on behalf of, or <i>pro</i>, the user, and 2) acting on their own initiative. To extend researchers' views on how proactive s...
     
Is autostereoscopy useful for handheld AR?
Found in: Proceedings of the 12th International Conference on Mobile and Ubiquitous Multimedia (MUM '13)
By Antonio Krüger, Antti Oulasvirta, Florian Daiber, Frederic Kerber, Michael Mauderer, Pascal Lessel
Issue Date:December 2013
pp. 1-4
Some recent mobile devices have autostereoscopic displays that enable users to perceive stereoscopic 3D without lenses or filters. This might be used to improve depth discrimination of objects overlaid to a camera viewfinder in augmented reality (AR). Howe...
     
MenuOptimizer: interactive optimization of menu systems
Found in: Proceedings of the 26th annual ACM symposium on User interface software and technology (UIST '13)
By Antti Oulasvirta, Gilles Bailly, Sabrina Hoppe, Timo Kötzing
Issue Date:October 2013
pp. 331-342
Menu systems are challenging to design because design spaces are immense, and several human factors affect user behavior. This paper contributes to the design of menus with the goal of interactively assisting designers with an optimizer in the loop. To rea...
     
Multi-touch rotation gestures: performance and ergonomics
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Antti Oulasvirta, Anu Lehtiö, Eve Hoggan, John Williamson, Miguel Nacenta, Per Ola Kristensson
Issue Date:April 2013
pp. 3047-3050
Rotations performed with the index finger and thumb involve some of the most complex motor action among common multi-touch gestures, yet little is known about the factors affecting performance and ergonomics. This note presents results from a study where t...
     
Improving two-thumb text entry on touchscreen devices
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Anna Reichel, Antti Oulasvirta, Keith Vertanen, Myroslav Bachynskyi, Per Ola Kristensson, Wenbin Li, Yan Zhang
Issue Date:April 2013
pp. 2765-2774
We study the design of split keyboards for fast text entry with two thumbs on mobile touchscreen devices. The layout of KALQ was determined through first studying how users should grip a device with two hands. We then assigned letters to keys computational...
     
Information capacity of full-body movements
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Antti Oulasvirta, Arttu Modig, Laura Leppänen, Teemu Roos
Issue Date:April 2013
pp. 1289-1298
We present a novel metric for information capacity of full-body movements. It accommodates HCI scenarios involving continuous movement of multiple limbs. Throughput is calculated as mutual information in repeated motor sequences. It is affected by the comp...
     
Grand challenges in text entry
Found in: CHI '13 Extended Abstracts on Human Factors in Computing Systems (CHI EA '13)
By Annalu Waller, Antti Oulasvirta, Benoît Martin, James Clawson, Keith Vertanen, Leah Findlater, Mark Dunlop, Per Ola Kristensson, Poika Isokoski, Stephen Brewster
Issue Date:April 2013
pp. 3315-3318
Our workshop serves two purposes. First, to bring text entry researchers working in the human-computer interaction (HCI), natural language processing (NLP) and augmentative and alternative communication (AAC) communities together at CHI. Second, we will se...
     
PianoText: transferring musical expertise to text entry
Found in: CHI '13 Extended Abstracts on Human Factors in Computing Systems (CHI EA '13)
By Anna Maria Feit, Antti Oulasvirta
Issue Date:April 2013
pp. 3043-3046
We present PianoText, a text entry method based on a piano keyboard with an optimized mapping between notes and chords of music to letters of the English language. PianoText exemplifies the idea of transferring musical expertise to a text entry task by com...
     
Biomechanical simulation in the analysis of aimed movements
Found in: CHI '13 Extended Abstracts on Human Factors in Computing Systems (CHI EA '13)
By Antti Oulasvirta, Gregorio Palmas, Myroslav Bachynskyi, Tino Weinkauf
Issue Date:April 2013
pp. 277-282
For efficient design of gestural user interfaces both performance and fatigue characteristics of movements must be understood. We are developing a novel method that allows for biomechanical analysis in conjunction with performance analysis. We capture moti...
     
Long-term effects of ubiquitous surveillance in the home
Found in: Proceedings of the 2012 ACM Conference on Ubiquitous Computing (UbiComp '12)
By Antti Oulasvirta, Aurora Pihlajamaa, Debarshi Ray, Jukka Perkiö, Niklas Vainio, Petri Myllymäki, Taneli Vähäkangas, Tero Hasu
Issue Date:September 2012
pp. 41-50
The Helsinki Privacy Experiment is a study of the long-term effects of ubiquitous surveillance in homes. Ten volunteering households were instrumented with video cameras with microphones, and computer, wireless network, smartphone, TV, DVD, and customer ca...
     
Ease of juggling: studying the effects of manual multitasking
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Antti Oulasvirta, Joanna Bergstrom-Lehtovirta
Issue Date:May 2011
pp. 3103-3112
Everyday activities often involve using an interactive device while one is handling various other physical objects (wallets, bags, doors, pens, mugs, etc.). This paper presents the Manual Multitasking Test, a test with 12 conditions emulating manual demand...
     
Interaction with magic lenses: real-world validation of a Fitts' Law model
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Antti Oulasvirta, Michael Rohs, Tiia Suomalainen
Issue Date:May 2011
pp. 2725-2728
Rohs and Oulasvirta (2008) proposed a two-component Fitts' law model for target acquisition with magic lenses in mobile augmented reality (AR) with 1) a physical pointing phase, in which the target can be directly observed on the background surface, and 2)...
     
A simple index for multimodal flexibility
Found in: Proceedings of the 28th international conference on Human factors in computing systems (CHI '10)
By Antti Oulasvirta, Joanna Bergstrom-Lehtovirta
Issue Date:April 2010
pp. 1475-1484
Most interactive tasks engage more than one of the user's exteroceptive senses and are therefore multimodal. In real world situations with multitasking and distractions, the key aspect of multimodality is not which modalities can be allocated to the intera...
     
When more is less: the paradox of choice in search engine use
Found in: Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval (SIGIR '09)
By Antti Oulasvirta, Barry Schwartz, Janne P. Hukkinen
Issue Date:July 2009
pp. 435-435
In numerous everyday domains, it has been demonstrated that increasing the number of options beyond a handful can lead to paralysis and poor choice and decrease satisfaction with the choice. Were this so-called paradox of choice to hold in search engine us...
     
All My People Right Here, Right Now: management of group co-presence on a social networking site
Found in: Proceedings of the ACM 2009 international conference on Supporting group work (GROUP '09)
By Airi Lampinen, Antti Oulasvirta, Sakari Tamminen
Issue Date:May 2009
pp. 375-376
A mundane but theoretically interesting and practically relevant situation presents itself on social networking sites: the co-presence of multiple groups important to an individual. This primarily qualitative study concentrates on the point of view of indi...
     
Users' preferences regarding intelligent user interfaces: differences among users and changes over time
Found in: Proceedingsc of the 13th international conference on Intelligent user interfaces (IUI '09)
By Anthony Jameson, Antti Oulasvirta, Silvia Gabrielli
Issue Date:February 2009
pp. 653-654
The goal of this full-day workshop is to arrive at a synthesis of knowledge that will help people who work with intelligent user interfaces to predict and explain how users' attitudes and behavior toward aspects of such systems (a) differ from one user to ...
     
Designing mobile awareness cues
Found in: Proceedings of the 10th international conference on Human computer interaction with mobile devices and services (MobileHCI '08)
By Antti Oulasvirta
Issue Date:September 2008
pp. 1-30
This paper considers how we may design future mobile awareness systems. Building upon research on social cognition, we suggest the need to take into account what is known about humans' interpretational capabilities. We identify design issues from the level...
     
Target acquisition with camera phones when used as magic lenses
Found in: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems (CHI '08)
By Antti Oulasvirta, Michael Rohs
Issue Date:April 2008
pp. 49-54
When camera phones are used as magic lenses in handheld augmented reality applications involving wall maps or posters, pointing can be divided into two phases: (1) an initial coarse physical pointing phase, in which the target can be directly observed on t...
     
Mobile kits and laptop trays: managing multiple devices in mobile information work
Found in: Proceedings of the SIGCHI conference on Human factors in computing systems (CHI '07)
By Antti Oulasvirta, Lauri Sumari
Issue Date:April 2007
pp. 1127-1136
A study at a large IT company shows that mobile information workers frequently migrate work across devices (here: smartphones, desktop PCs, laptops). While having multiple devices provides new opportunities to work in the face of changing resource deprivat...
     
Need for non-visual feedback with long response times in mobile HCI
Found in: Special interest tracks and posters of the 14th international conference on World Wide Web (WWW '05)
By Antti Oulasvirta, Virpi Roto
Issue Date:May 2005
pp. 775-781
When browsing Web pages with a mobile device, the system response times are variable and much longer than on a PC. Users must repeatedly glance at the display to see when the page finally arrives, although mobility demands a Minimal Attention User Interfac...
     
Interrupted cognition and design for non-disruptiveness: the skilled memory approach
Found in: CHI '05 extended abstracts on Human factors in computing systems (CHI '05)
By Antti Oulasvirta
Issue Date:April 2005
pp. 1124-1125
Interruptions have gained in importance as a topic in current HCI research. Through a series of experiments, we take a step toward analyzing the active role of human memory in controlling interruptions. The results of these experiments lead us to propose a...
     
Interaction in 4-second bursts: the fragmented nature of attentional resources in mobile HCI
Found in: Proceeding of the SIGCHI conference on Human factors in computing systems (CHI '05)
By Antti Oulasvirta, Jaana Kuorelahti, Sakari Tamminen, Virpi Roto
Issue Date:April 2005
pp. 919-928
When on the move, cognitive resources are reserved partly for passively monitoring and reacting to contexts and events, and partly for actively constructing them. The Re-source Competition Framework (RCF), building on the Multiple Resources Theory, explain...
     
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