Michael Haller

Michael Haller
Fachhochschule Oberösterreich | fh-ooe

Professor

About

174
Publications
78,491
Reads
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3,225
Citations
Education
September 1997 - January 2001
Johannes Kepler University Linz
Field of study
  • Computer science

Publications

Publications (174)
Conference Paper
Full-text available
We present Sonoflex, a thin-form, embroidered dynamic speaker made without using a permanent magnet. Our design consists of two flat spiral coils, stacked on top of each other, and is based on an isolated, thin (0.15 mm) enameled copper wire. Our approach allows for thin, lightweight, and textile speakers and does not require high voltage as in ele...
Conference Paper
Full-text available
We demonstrate a force sensing knitted textile, based on a piezo-resistive yarn. The resulting elastic, stretchable, and robust textile exhibits sensors based on the widespread Force Sensitive Resistor (FSR) principle. As a proof-of-concept, we implemented a knit consisting of multiple piezo-resistive wales, each intersecting with a single vertical...
Article
Full-text available
2020 ACM. We present Sonoflex, a thin-form, embroidered dynamic speaker made without using a permanent magnet. Our design consists of two flat spiral coils, stacked on top of each other, and is based on an isolated, thin (0.15 mm) enameled copper wire. Our approach allows for thin, lightweight, and textile speakers and does not require high voltage...
Conference Paper
Full-text available
We propose, implement and evaluate the use of a smartphone application for real-time six-degrees-of-freedom user input. We show that our app-based approach achieves high accuracy and goes head-to-head with expensive externally tracked controllers. The strength of our application is that it is simple to implement and is highly accessible --- requiri...
Conference Paper
Full-text available
We present RESi (Resistive tExtile Sensor Interfaces), a novel sensing approach enabling a new kind of yarn-based, resistive pressure sensing. The core of RESi builds on a newly designed yarn, which features conductive and resistive properties. We run a technical study to characterize the behaviour of the yarn and to determine the sensing principle...
Article
Full-text available
Prolonged sitting is a risk factor for several diseases and the prevalence of worksite-based interventions such as sit-to-stand workstations is increasing. Although their impact on sedentary behaviour has been regularly investigated, the effect of working in alternating body postures on cognitive performance is unclear. To address this uncertainty,...
Conference Paper
Over the last decades, there have been numerous efforts in wearable computing research to enable interactive textiles. Most work focus, however, on integrating sensors for planar touch gestures, and thus do not fully take advantage of the flexible, deformable and tangible material properties of textile. In this work, we introduce SmartSleeve, a def...
Conference Paper
We present a demonstration of GestureDrawer, a one-handed interaction with a 3D imaginary interface.
Conference Paper
Existing empty-handed mid-air interaction techniques for system control are typically limited to a confined gesture set or point-and-select on graphical user interfaces. In this paper, we introduce GestureDrawer, a one-handed interaction with a 3D imaginary interface. Our approach allows users to self-define an imaginary interface, acquire visuospa...
Conference Paper
The increased interest in interactive soft materials, such as smart clothing and responsive furniture, means that there is a need for flexible and deformable electronics. In this paper, we focus on stitch-based elastic sensors, which have the benefit of being manufacturable with textile craft tools that have been used in homes for centuries. We con...
Conference Paper
Full-text available
Constructive assemblies are tangible user interfaces (TUIs) that involve the interconnection of modular parts. As such, they offer a unique means to support us in our various and diverse activities. However, little information is available for understanding the intricacies of taking a modular, constructive assembly approach to TUI design. Based on...
Conference Paper
Today's commercially available prosthetic limbs lack tactile sensation and feedback. Recent research in this domain focuses on sensor technologies designed to be directly embedded into future prostheses. We present a novel concept and prototype of a prosthetic-sensing wearable that offers a non-invasive, self-applicable and customizable approach fo...
Article
Full-text available
Background: Prolonged sitting is ubiquitous in modern society and linked to several diseases. Height-adjustable desks are being used to decrease worksite based sitting time (ST). Single-desk sit-to-stand workplaces exhibit small ST reduction potential and short-term loss in performance. The aim of this paper is to report the study design and metho...
Conference Paper
Ambient light is starting to be commercially used to enhance the viewing experience for watching TV. We believe that ambient light can add value in meeting and control rooms that use large vertical interactive surfaces. Therefore, we equipped a large interactive whiteboard with a peripheral ambient light display and explored its utility for differe...
Conference Paper
In the FlexTiles demonstration, we present a flexible, stretchable, pressure-sensitive, tactile input sensor consisting of three layers of fabric. We demonstrate the implementation of FlexTiles for covering large areas, 3D objects, and deformable underlying shapes. In order to measure these large areas with high framerate, we demonstrate a simple m...
Conference Paper
Full-text available
FlexCase is a novel flip cover for smartphones, which brings flexible input and output capabilities to existing mobile phones. It combines an e-paper display with a pressure- and bendsensitive input sensor to augment the capabilities of a phone. Due to the form factor, FlexCase can be easily transformed into several different configurations, each w...
Conference Paper
Full-text available
Structuring and rearranging free-hand sketches on large interactive surfaces typically requires making multiple stroke selections. Without well-designed selection tools, this can be both time-consuming and fatiguing. Investigating the concept of automated clustering, we conducted a background study to understand the varying perspectives of how elem...
Conference Paper
" Structuring and rearranging free-hand sketches on large interactive surfaces typically requires making multiple stroke selections. This can be both time-consuming and fatiguing in the absence of well-designed selection tools. Investigating the concept of automated clustering, we conducted a background study which highlighted the fact that people...
Conference Paper
In this paper we evaluated the possible application of a passive, optical sensor as an interface for human-smart glasses interactions. The designed proximity sensor is composed of set of photodiodes and the appropriate hardware and software components. First, experiments were performed for the estimations of such parameters as distance to an object...
Conference Paper
Full-text available
Early research on head-worn computers (HWCs) has focused on hardware and specific applications. However, there is little research about the everyday usage of head-worn computers in particular aspects such as: context of use, social acceptance across different activities, audiences and interaction techniques. This paper provides insights into the us...
Article
Industrial designers have a tangible working style. However, compared to digital data, physical mockups are difficult to copy and share over distance. They require a lot of physical space, and earlier versions are lost once they are modified. In this paper, we introduce Catch-Up 360, a tool designed for sharing physical mockups over distance to gai...
Article
Rekimoto's Pick-and-Drop (P&D) transfer technique is commonly used to support multi-surface object transfer (e.g., between a shared tabletop and tablet) due to its easily understood metaphor of emulating object movement in the physical world. Current multi-surface implementations of P&D provide little to no feedback during transfer, causing confusi...
Conference Paper
Full-text available
We present Tracs, a dual-sided see-through display system with controllable transparency. Traditional displays are a constant visual and communication barrier, hindering fast and efficient collaboration of spatially close or facing coworkers. Transparent displays could potentially remove these barriers, but introduce new issues of personal privacy,...
Article
This paper presents 3D-Board, a digital whiteboard capable of capturing life-sized virtual embodiments of geographically distributed users. When using large-scale screens for remote collaboration, awareness for the distributed users' gestures and actions is of particular importance. Our work adds to the literature on remote collaborative workspaces...
Conference Paper
Full-text available
We present FlexSense, a new thin-film, transparent sensing surface based on printed piezoelectric sensors, which can reconstruct complex deformations without the need for any external sensing, such as cameras. FlexSense provides a fully self-contained setup which improves mobility and is not affected from occlusions. Using only a sparse set of sens...
Patent
The present invention relates to a multi-touch display system that supports both multi-touch human input as well as input from a digital pen. The display system has a display panel that is configured to allow human touches along a front surface to be detected and tracked. The display panel also includes a location pattern that preferably covers the...
Article
Full-text available
We developed a paperclip-shaped motion-actuating system, named “Move-it”. With this system, users can add motions to sticky notes just by clipping it. This system is constructed by using clip-shaped devices that have sensors and actuators. The recognition system uses photo interrupter module as sensor. Each clip device can recognize which note it h...
Article
Full-text available
Office workers spend a majority of their time in front of their computer display. Therefore the display becomes a constant visual barrier and a barrier for communication. Even workers sitting across a table have to make a high effort to communicate by either standing up or walking around the table to see each other. Transparent displays have a high...
Conference Paper
Full-text available
During everyday office work we are used to controlling our computers with keyboard and mouse, whereas the physical ¬space around us remains largely unattended. Addressing this untapped potential, we follow an approach that is based on gestural interaction with smart furniture interfaces, subtly blended into the work environment. Adding to existing...
Conference Paper
Full-text available
During everyday office work we are used to controlling our computers with keyboard and mouse, while the majority of our body remains unchallenged and the physical work-space around us stays largely unattended. Addressing this untapped potential, we explore the concept of turning a flexible office chair into a ubiquitous input device. To facilitate...
Article
In this paper, we present Presstures, an extension to current multi-touch operations that enriches common multi-finger gestures with pressure information. By using the initially applied pressure level for implicit mode switching, a gesture can be enhanced with different functionalities to enlarge the interaction space for multi-touch. To evaluate t...
Article
This paper introduces an alternative novel visualization concept to organize visual data. Our design has been guided by the goal to make information visible with uniform snapshots. After a detailed description of design implications, our interaction model is fully demonstrated within a file management prototype that utilizes the new visualization....
Conference Paper
Full-text available
Post-it notes are a popular paper format that serves a multitude of purposes in our daily lives, as they provide excellent affordances for quick capturing of informal notes, and location-sensitive reminding. In this paper, we present Move-it, a system that combines Post-it notes with a technologically enhanced paperclip to demonstrate how a passive...
Conference Paper
Full-text available
Modifying a digital sketch may require multiple selections before a particular editing tool can be applied. Especially on large interactive surfaces, such interactions can be fatiguing. Accordingly, we propose a method, called Suggero, to facilitate the selection process of digital ink. Suggero identifies groups of perceptually related drawing obje...
Article
Situation maps play an important role in planning and decision making in emergency response centers. Important information such as operating units or hazards is usually shown on these maps. Arranging the huge amount of in-formation can be challenging for operators, as this information should always be visible while not occluding im-portant regions...
Conference Paper
Full-text available
Ferroelectric material supports both pyro-and piezoelectric effects that can be used for sensing pressures on large, bended surfaces. We present PyzoFlex®, a pressure-sensing input device that is based on a ferroelectric material (PVDF:TrFE). It is constructed by a sandwich structure of four layers that can easily be printed on any substrate. The P...
Conference Paper
Full-text available
In practice, most creativity techniques are still performed with traditional tools, such as pen and paper, whiteboards, and flipcharts. When transforming these techniques into a digital environment, the reduction of organizational overhead is the main goal to foster accessibility. Still, we do not know if overhead reduction fosters creativity or if...
Conference Paper
Full-text available
Nowadays sedentary behaviors such as prolonged sitting have become a predominant element of our lives. Particularly in the office environment, many people spend the majority of their working day seated in front of a computer. In this paper, we investigate the adoption of a physically active work process within an activity-promoting office workspace...
Article
Move-it is active paperclip system that transforms traditional paper into an active digital medium by adding content recognition and automated actuation. Each paperclip consists of a polyester plate and shape memory alloy (SMA) as an actuator, and photo-reflectors as sensors that recognize the ID each sheet of paper has. Every stroke can be tracked...
Conference Paper
Full-text available
A typical office worker nowadays spends the majority of his time sedentary in the course of his working life. In this paper, we address the problem of sedentariness in the context of office work through smooth integration of light physical activity into the daily work routine. Equipping a flexible office chair with motion sensing functionality, the...
Conference Paper
Full-text available
Overview+Detail interfaces can be used to examine the details of complex data while retaining the data's overall context. Dynamic data introduce challenges for these interfaces, however, as moving objects may exit the detail view, as well as a person's field of view if they are working at a large interactive surface. To address this "off-view" prob...
Conference Paper
Triggering commands on large interactive surfaces is less efficient than on desktop PCs. It requires either large physical movements to reach an interaction area (e.g., buttons) or additional operations to call context menus (e.g., dwell). There is a lack of efficient ways to trigger shortcuts. We introduce Kolibri - a pen-based gesture system that...
Conference Paper
Full-text available
The increasing degree of computerization over the past years had led to higher amounts of sedentary time and time spent in static postures, which can be associated with higher risks of chronic diseases, obesity and even mortality. To counteract this negative developments a novel workplace conception called “Active Office” consisting of a standing a...
Conference Paper
Full-text available
Blended Interaction is interaction in physical environments including meeting rooms, design studios, or libraries, that are augmented with new UI technologies to blend the power of digital computing with natural work practices and collaboration styles. It combines the virtues of physical and digital artifacts so that desired properties of each are...
Patent
A collaboration system provides enhanced user interface to enable users to interact with electronic devices. In one embodiment, users can add content to a digital system by using a pen that streams coordinates so that input to the digital system may be based on conventional pen and paper handwriting. In another embodiment, a pie-based menu system i...
Technical Report
Full-text available
In this paper we present the results of a study of human preferences in using mid-air gestures for directing other humans. Rather than contributing a specific set of gestures, we contribute a set of gesture types, which together make a set of the core actions needed to complete any of our six chosen tasks in the domain of human-to-human gestural co...
Conference Paper
Full-text available
Ferroelectric material supports both pyro-and piezoelectric effects that can be used for sensing pressures on large, bended surfaces. We present PyzoFlex, a pressure-sensing input device that is based on a ferroelectric material. It is constructed with a sandwich structure of four layers that can be printed easily on any material. We use this mater...
Article
Full-text available
Creativity and innovation are much sought-after qualities of indi-viduals and organizations, but existing creativity practises are not cohesively integrated with digital workflows or digital artefacts. We introduce a set of design considerations for digital systems to support creative processes, specifically supporting the three ongo-ing, iterative...
Conference Paper
Full-text available
Interactive spaces are ubiquitous computing environments for computer-supported collaboration that exploit and enhance the existing cognitive, physical and social skills of users or groups of users. The workshop aims at documenting and advancing the current state-of-the-art of co-located collaboration in interactive spaces and identifying research...
Conference Paper
When multiple users are simultaneously sharing a workspace, it is not always clear what should happen when a user invokes an undo action. In this paper we explore different user interfaces for undo/redo for co-located collaborative workspaces, such as large interactive whiteboards. A preliminary study revealed that users expect neither a global nor...
Conference Paper
Full-text available
Work-related musculoskeletal disorders have become one of the most common chronic diseases of modern society. In this paper, we address the problem of physical inactivity in the context of office work and we introduce a new concept of working “in-motion” with high potential to reduce prolonged sedentary behavior and related degenerative phenomena....
Chapter
Full-text available
Creating novel user interfaces that are "natural" and distributed is chal-lenging for designers and developers. "Natural" interaction techniques are barely standardized and in combination with distributed UIs additional technical difficul-ties arise. In this paper we present the lessons we have learned in developing sev-eral natural and distributed...
Conference Paper
Full-text available
In this paper, we present the Harpoon selection tool, a novel selection technique specifically designed for interactive whiteboards. The tool combines area cursors and crossing to perform complex selections amongst a large number of unsorted, ungrouped items. It is optimized for large-scale pen-based surfaces and works well in both dense and sparse...