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55th Human Factors and Ergonomics Society Annual Meeting, HFES 2011

作者： Ashoori, Maryam Burns, Catherine Momtahan, Kathryn D'Entremont, Barbara Advanced Interface Design Lab. University of Waterloo Canada Nursing Professional Practice Department Ottawa Hospital Canada

ISBN: (纸本)9780945289395

Cognitive Work Analysis (CWA) is gaining momentum for analyzing complex socio-technical systems but it does not yet have the specific tools and techniques that allow it to address teamwork explicitly enough to provide good guidance on how to support teams. This paper focuses on expansion of control task analysis (ConTA) the second phase of CWA to understand the collaborative decision making of a surgical team during Cesarean section surgery. Copyright 2011 by Human Factors and Ergonomics Society, Inc. All rights reserved.

关键词： Decision making

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Control Task Analysis in Action: Collaboration in the Operating Room

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Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2011年第1期55卷 272 - 276页

作者： Maryam Ashoori Catherine Burns Kathryn Momtahan Barbara d’Entremont Advanced Interface Design Lab University of Waterloo Nursing Professional Practice Department The Ottawa Hospital

Cognitive Work Analysis (CWA) is gaining momentum for analyzing complex socio-technical systems but it does not yet have the specific tools and techniques that allow it to address teamwork explicitly enough to provide good guidance on how to support teams. This paper focuses on expansion of control task analysis (ConTA), the second phase of CWA, to understand the collaborative decision making of a surgical team during Cesarean section surgery.

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Reinventing the wheel: Control task analysis for collaboration

Reinventing the wheel: Control task analysis for collaborati...

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54th Human Factors and Ergonomics Society Annual Meeting 2010, HFES 2010

作者： Ashoori, Maryam Burns, Catherine Advanced Interface Design Lab. University of Waterloo Canada

ISBN: (纸本)9781617820885

Cognitive work analysis (CWA) is a relatively new human factors perspective for analyzing complex sociotechnical systems. However, it does not yet have specific tools and techniques that allow it to address teamwork explicitly enough to provide good guidance on how to support teams and collaboration. In this paper, Decision Wheels are introduced as an extension to the Decision Ladders for representing collaboration in teamwork environments. This extension would be a significant contribution to both CWA methodology and human factors methods for team situations. It would enable human factors practitioners to understand the cognitive work of teams better, and to design better collaborative systems for teamwork environments. Copyright 2010 by Human Factors and Ergonomics Society, Inc. All rights reserved.

关键词： Wheels

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Reinventing the Wheel: Control Task Analysis for Collaboration

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Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2010年第4期54卷 274 - 278页

作者： Maryam Ashoori Catherine Burns Advanced Interface Design Lab University of Waterloo

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Effect of brightness of assisted target detection cues in a simulated search and rescue task

Effect of brightness of assisted target detection cues in a ...

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54th Human Factors and Ergonomics Society Annual Meeting 2010, HFES 2010

作者： Giang, Wayne Keefe, Allan Keillor, Jocelyn Department of Systems Design Engineering University of Waterloo Waterloo Canada Defence Research and Development Canada - Toronto Toronto Canada Institute for Aerospace Research Flight Research Lab. National Research Council of Canada Ottawa Canada

ISBN: (纸本)9781617820885

Assisted target detection (ATD) systems are designed to direct the user's attention to relevant areas of the display, but the majority of the research into the use of such systems does not consider the design of the cue itself. Within a search and rescue (SAR) context, there is a possibility that cues designed to facilitate effective search could in fact distract a SAR operator's search of the terrain, reducing the probability of locating a crashed aircraft. In order to determine if salience matters in the design of an ATD system for video-based sensor systems, it is important to study the impact of highly salient cues on visual search. In a previous experiment where the saliency of a cue was varied using different levels of cue brightness in a search task with static imagery, it was found that the more salient cues produced faster response times without any detrimental effects on accuracy. In the present experiment we used dynamic imagery from a SAR simulator. We found that cues of different brightness improved the sensitivity (d') of participants when compared to conditions in which no cues were available, but there was no evidence of any differences between the different levels of cue brightness. These findings suggest that cue brightness may not influence the salience of cues as much as one might expect in the context of a full-motion simulation. Other visual dimensions such as visual onsets or colour may potentially play a larger role in determining the saliency of ATD system cues when used in a task involving motion such as SAR.

关键词： Luminance

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Solar scramble: An educational children's game for collaborative multi-touch digital tabletops 10

Solar scramble: An educational children's game for collabora...

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Proceedings of the 28th ACM International Conference on design of Communication

作者： Kelly, Ashley R. Wallace, James R. Cerar, Katie Randall, Neil McClelland, Phillip Seto, Amanda Mindy Department of English Language and Literature Canada Department of Systems Design Engineering Canada University of Waterloo 200 University Avenue Waterloo ON N2L 3G1 Canada Critical Media Lab. Canada

ISBN: (纸本)9781450304030

Our experience report describes the design and development of an educational game for interactive, multi-touch tabletop displays. The game has been designed for children aged 5-10 on the SMART Tabletop platform. This experience report describes the process, design and development of our application and the implications we have drawn from this work in the design of educational technologies for interactive multi-touch tabletops. To investigate the effectiveness of our design, and to identify potential issues in deploying our software, we conducted participant interviews. Based on our design and development process, as well as our participant feedback, we have identified several key issues regarding the development of educational software for K-5 aged (5-10 years old) children on digital tabletops. This research was conducted at the university of waterloo jointly by the Collaborative systems laboratory and the Critical Media lab. Copyright 2010 ACM.

关键词： E-learning

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Field emission efficiency of a carbon nanotube array under parasitic nonlinearities

Field emission efficiency of a carbon nanotube array under p...

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ASME 2010 International Mechanical engineering Congress and Exposition, IMECE 2010

作者： Anand, Sandeep V. Roy Mahapatra, D. Sinha, Niraj Yeow, J.T.W. Melnik, R.V.N. Department of Aerospace Engineering Indian Institute of Science Bangalore 560012 India Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA 02139 United States Department of Systems Design Engineering University of Waterloo Waterloo ON N2L 3G1 Canada M2NeT Lab Wilfrid Laurier University Waterloo ON N2L3C5 Canada BCAM Bizkaia Technology Park 48160 Derio Spain

ISBN: (纸本)9780791844472

Carbon Nanotubes (CNTs) grown on substrates are potential electron sources in field emission applications. Several studies have reported the use of CNTs in field emission devices, including field emission displays, X-ray tube, electron microscopes, cathode-ray lamps, etc. Also, in recent years, conventional cold field emission cathodes have been realized in micro-fabricated arrays for medical X-ray imaging. CNTbased field emission cathode devices have potential applications in a variety of industrial and medical applications, including cancer treatment. Field emission performance of a single isolated CNT is found to be remarkable, but the situation becomes complex when an array of CNTs is used. At the same time, use of arrays of CNTs is practical and economical. Indeed, such arrays on cathode substrates can be grown easily and their collective dynamics can be utilized in a statistical sense such that the average emission intensity is high enough and the collective dynamics lead to longer emission life. The authors in their previous publications had proposed a novel approach to obtain stabilized field emission current from a stacked CNT array of pointed height distribution. A mesoscopic modeling technique was employed, which took into account electro-mechanical forces in the CNTs, as well as transport of conduction electron coupled with electron-phonon induced heat generation from the CNT tips. The reported analysis of pointed arrangements of the array showed that the current density distribution was greatly localized in the middle of the array, the scatter due to electrodynamic force field was minimized, and the temperature transients were much smaller compared to those in an array with random height distribution. In the present paper we develop a method to compute the emission efficiency of the CNT array in terms of the amount of electrons hitting the anode surface using trajectory calculations. Effects of secondary electron emission and parasitic capacitive nonlin

关键词： Carbon nanotubes

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Effect of Brightness of Assisted Target Detection Cues in a Simulated Search and Rescue Task

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Proceedings of the Human Factors and Ergonomics Society Annual Meeting 2010年第18期54卷 1306 - 1310页

作者： Wayne Giang Allan Keefe Jocelyn Keillor Department of Systems Design Engineering University of Waterloo Waterloo Canada Defence Research and Development Canada - Toronto Toronto Canada Institute for Aerospace Research – Flight Research Lab National Research Council of Canada Ottawa Canada

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CRISTAL: A Collaborative Home Media and Device Controller Based on a Multi-touch Display 09

CRISTAL: A Collaborative Home Media and Device Controller Ba...

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4th ACM International Conference on Interactive Tabletops and Surfaces, ITS 2009

作者： Seifried, Thomas Haller, Michael Scott, Stacey D. Perteneder, Florian Rendl, Christian Sakamoto, Daisuke Inami, Masahiko Media Interaction Lab Upper Austria University of Applied Sciences Austria Department of Systems Design Engineering University of Waterloo Canada Department of Computer Science University of Tokyo Japan School of Media Design Keio University Japan

ISBN: (纸本)9781605587332

While most homes are inherently social places, existing devices designed to control consumer electronics typically only support single user interaction. Further, as the number of consumer electronics in modern homes increases, people are often forced to switch between many controllers to interact with these devices. To simplify interaction with these devices and to enable more collaborative forms of device control, we propose an integrated remote control system, called CRISTAL (Control of Remotely interfaced systems using Touch-based Actions in Living spaces). CRISTAL enables people to control a wide variety of digital devices from a centralized, interactive tabletop system that provides an intuitive, gesture-based interface that enables multiple users to control home media devices through a virtually augmented video image of the surrounding environment. A preliminary user study of the CRISTAL system is presented, along with a discussion of future research directions. © 2009 ACM.

关键词： Digital devices

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Particle swarm clustering ensemble 08

Particle swarm clustering ensemble

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10th Annual Genetic and Evolutionary Computation Conference, GECCO 2008

作者： Ahmadi, Abbas Karray, Fakhri Kamel, Mohamed Pattern Analysis and Machine Intelligence Lab. Department of Systems Design Engineering University of Waterloo 200 University Avenue West Waterloo ON Canada

ISBN: (纸本)9781605581309

Extracting natural groups of the unlabeled data is known as clustering. To improve the stability and robustness of the clustering outputs, clustering ensembles have emerged recently. In this paper, an ensemble of particle swarm clustering algorithms is proposed. That is, the members of the ensemble are based on the cooperative swarms clustering approaches. The performance of the proposed particle swarm clustering ensemble is evaluated using different data sets and is compared to that of other clustering techniques.

关键词： Particle swarm optimization (PSO)

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