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Integration of Cognitive Modeling into the Evaluation of Electronic Health Records

Proceedings of the International Symposium on human Factors and Ergonomics in Health Care 2013年第1期2卷 57 - 62页

作者： Leif P. Berg Andrea Mahnke Robert Moritz Human-Computer Interaction Graduate Program Iowa State University Biomedical Informatics Research Center Marshfield Clinic

Previous research has consistently cited the importance of a usable interface in the successful adoption of the electronic health record (EHR). Among the most time intensive EHR activities is computerized Physician Order Entry (CPOE) a method of creating and modifying orders through an electronic interface. The Marshfield Clinic, a non-profit, regional health care organization in Wisconsin, is in the process of implementing a new CPOE system. As a part of early evaluation, cognitive and behavioral modeling was coupled with formative usability testing to better understand the potential use of a new CPOE design. Participants consisted of 11 medical residents. Results suggest that participants were able to complete the majority of task scenarios in less than 20 seconds per task. Additionally, the integration of a cognitive and behavioral tool provided new evaluation information to help aid in future design efforts.

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Examining the effect of level of stress on firefighters' time-todecision in virtual reality

Examining the effect of level of stress on firefighters' tim...

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57th human Factors and Ergonomics Society Annual Meeting - 2013, HFES 2013

作者： Keren, Nir Bayouth, Shawn T. Franke, Warren D. Godby, Kevin M. Dept. of Ag. and Bios. Eng. Virtual Reality Application Center Iowa State University United States Dept. of Ag. and Bios. Eng. Iowa State University United States IA Fire Dept. United States Dept. of Kinesiology Virtual Reality Application Center Iowa State University United States Human Computer Interaction Graduate Program Iowa State University United States

ISBN: (纸本)9780945289432

Highly immersive virtual reality environments were used to examine firefighters' decision making process and choice. We report here the effects of acute occupationally-relevant stress level on time-todecision. When comparing low to high-stress situations, time spent on enhancing situational awareness and overall time-to-decision were significantly longer in the low stress setting. However, time spent on reviewing information that was not embedded in the environment was not statically different. Analysis indicated that stress level did not significantly affect the distribution of final choice. We propose that when stress increases, firefighters sacrifice time available to them to enhance their situational awareness rather than sacrifice information review time;however, stress per se, did not affect their decision choice. Copyright 2013 by human Factors and Ergonomics Society, Inc.

关键词： Virtual reality

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Examining the effect of level of stress on firefighters’ time-to-decision in virtual reality

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Proceedings of the human Factors and Ergonomics Society Annual Meeting 2013年第1期57卷 299 - 303页

作者： Nir Keren Shawn T. Bayouth Warren D. Franke Kevin M. Godby Virtual Reality Application Center and Dept. of Ag. & Bios. Eng. Iowa State University Dept. of Ag. & Bios. Eng. Iowa State University Fire Chief Ames IA Fire Dept. Virtual Reality Application Center and Dept. of Kinesiology Iowa State University Human Computer Interaction Graduate Program Iowa State University

Highly immersive virtual reality environments were used to examine firefighters’ decision making process and choice. We report here the effects of acute occupationally-relevant stress level on time-to-decision. When comparing low to high-stress situations, time spent on enhancing situational awareness and overall time-to-decision were significantly longer in the low stress setting. However, time spent on reviewing information that was not embedded in the environment was not statically different. Analysis indicated that stress level did not significantly affect the distribution of final *** propose that when stress increases, firefighters sacrifice time available to them to enhance their situational awareness rather than sacrifice information review time; however, stress per se, did not affect their decision choice.

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VR JuggLua: A framework for VR applications combining Lua, OpenSceneGraph, and VR Juggler

VR JuggLua: A framework for VR applications combining Lua, O...

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2012 5th Workshop on Software Engineering and Architectures for Realtime Interactive Systems, SEARIS 2012

作者： Pavlik, Ryan A. Vance, Judy M. Human-Computer Interaction Graduate Program Iowa State University United States Virtual Reality Applications Center Iowa State University United States

ISBN: (纸本)9781467312493

A gap exists between virtual reality (VR) software platforms designed for optimum hardware abstraction and cluster support, and those designed for efficient content authoring and exploration of interaction techniques through prototyping. This paper describes VR JuggLua, a high-level virtual reality application framework based on combining Lua, a dynamic, interpreted language designed for embedding and extension, with VR Juggler and OpenSceneGraph. This work allows fully-featured immersive applications to be written entirely in Lua, and also supports the embedding of the Lua engine in C++ applications. Like native C++ VR Juggler applications, VR JuggLua-based applications run successfully on systems ranging from a single desktop machine to a 49-node cluster. The osgLua introspection-based bindings facilitate scenegraph manipulation from Lua code, while bindings created using the Luabind template meta-programming library connect VR Juggler functionality. A thread-safe run buffer allows new Lua code to be passed to the interpreter during run time, supporting interactive creation of scene-graph structures. It has been successfully used in an immersive application implementing two different navigation techniques entirely in Lua and a physically-based virtual assembly simulation where C++ code handles physics computations and Lua code handles all display and configuration. © 2012 IEEE.

关键词： human computer interaction

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VR JuggLua: A framework for VR applications combining Lua, OpenSceneGraph, and VR Juggler

VR JuggLua: A framework for VR applications combining Lua, O...

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Workshop on Software Engineering and Architectures for Realtime Interactive Systems (SEARIS)

作者： Ryan A. Pavlik Judy M. Vance Human-Computer Interaction Graduate Program Iowa State University USA Virtual Reality Applications Center Iowa State University USA

关键词： Virtual reality Libraries Kernel Transforms Syntactics Solid modeling

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Assessing the use of cognitive resources in virtual reality

Assessing the use of cognitive resources in virtual reality

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14th International Conference on human-computer interaction, HCI International 2011

作者： Marsh, William E. Kelly, Jonathan W. Dark, Veronica J. Oliver, James H. Human Computer Interaction Graduate Program Iowa State University 1620 Howe Hall Ames IA United States Department of Psychology Iowa State University W112 Lagomarcino Hall Ames IA United States

ISBN: (纸本)9783642220944

Due to system limitations, interactions in virtual environments are often unnatural and this may impact performance. During learning, unnatural interactions draw from a finite pool of cognitive resources, meaning that those resources cannot be used for a concurrent, possibly more important task. Because users typically have primary objectives to accomplish in the virtual world, we argue that interaction techniques and other system design choices should account for task compatibility. We use a dual-task paradigm to study resource usage during locomotion tasks varying in their similarity to real-world locomotion. In one experiment, unnatural locomotion interfaces required additional spatial resources compared to natural movements. Some participants used unique strategies unlikely in traditional dual-task studies, possibly due to the high level of immersion. © 2011 Springer-Verlag.

关键词： User interfaces

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Journal of Computing and Information Science in Engineering 2009年第3期9卷 1-5页

作者： Zhang, Jingsheng Smith, Shana Human-Computer Interaction Graduate Program Iowa State University Ames IA 50011 United States Department of Mechanical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan

To achieve effective 3D shape retrieval, there is a crucial need for efficient shape matching methods. This paper introduces a new method for 3D shape matching, which uses a simplified octree representation of 3D mesh models. The simplified octree representation was developed to improve time and space efficiency over prior representations. The proposed method also stores octree information in extensible markup language format, rather than in a new proprietary data file type, to facilitate comparing models over the Internet. © 2009 by ASME.

关键词： Hypertext systems

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A virtual harp for therapy in an augmented reality environment

A virtual harp for therapy in an augmented reality environme...

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2008 ASME International Design Engineering Technical Conferences and computers and Information in Engineering Conference, DETC 2008

作者： Taylor, Tanasha Palmerius, Karijohan L. Smith, Shana Virtual Reality Applications Center Human Computer Interaction Graduate Program Iowa State University United States NorrkOping Visualization and Interaction Studio LinkOping University Sweden Department of Mechanical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9780791843253

The goal of this research study was to develop a music therapy tool using a computer-generated harp which could provide users with visual, audio, and haptic feedback during interaction with the virtual instrument. Realistic 3D visual and haptic feedback was provided through immersion in a portable augmented reality-based system composed of a video see- through head mounted display (HMD) and a Sensable Phantom Omni haptic device. Users play the virtual harp by using the Phantom Omni haptic device to pluck or strum the strings of the harp. Users can also freely move the harp in the augmented reality environment to provide a more realistic experience, similar to that of playing a traditional musical instrument. The system will be used to provide interactive musical experiences and to develop motor skills among individuals with disabilities through music therapy. A virtual therapist feature was developed which can be used by a therapist without musical knowledge to observe a user during therapy exercises or by a user to engage in self-motivated therapy exercises outside the therapy room. With the virtual therapy feature, users can follow a simple pre-determined sequence of notes using color-coded strings. User testing was completed to study usability, therapeutic effectiveness, and patients' therapy motivation. Copyright © 2008 by ASME.

关键词： Virtual reality

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Using immersive Virtual environments for realistic life-Size fire safety training for children

Using immersive Virtual environments for realistic life-Size...

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3rd IASTED International Conference on human-computer interaction, HCI 2008

作者： Ericson, Emily Smith, Shana Human-Computer Interaction Graduate Program Iowa State University Taipei United States Department of Mechanical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9780889867253

Injuries from residential fires are often overlooked as a dangerous safety concern for children. While lectures and classroom learning techniques can be effective in mitigating this risk, studies have shown that kids retain information better if they are allowed to practice escape techniques. Virtual Reality has been used to simulate situations that are too dangerous to practice in real life. This paper presents a fire safety program that combines classroom activities and small group interaction with fire professionals with a virtual simulation of an at-risk house. Students help firefighters to identify home fire hazards and then practice escaping from a simulated fire in a virtual environment. A CAVE is used to immerse participants in the fire scene.

关键词： Virtual reality

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2006 ASME International Design Engineering Technical Conferences and computers and Information In Engineering Conference, DETC2006

作者： Jingsheng, Zhang Smith, Shana Human-Computer Interaction Graduate Program Iowa State University United States

ISBN: (纸本)079183784X

Shape matching is one of the fundamental problems in content-based 3D shape retrieval. Since there are typically a large number of possible matches in a shape database, there is a crucial need to perform shape matching efficiently. As a result, shapes must be reduced into a simpler shape representation, and computational complexity is one of the most important criteria for evaluating 3D shape representations. To meet the need, the investigators have implemented a new effective and efficient approach for 3D shape matching, which uses a simplified octree representation of 3D mesh models. The simplified octree representation was developed to improve time and space efficiency over prior representations. In addition, octree representations are rapidly becoming the standard file format for delivering 3D content across the Internet. The proposed approach stores octree information in XML files, rather than using a new data file type, to facilitate comparing models over the Internet. New methods for normalizing models, generating octrees, and comparing models were developed. The proposed approach allows users to efficiently exchange shape information and compare models over the Internet, in standardized data and data file formats, without transferring exact model files. The proposed approach is the first step in a project which will build a complete 3D model database and data retrieval system, which can be incorporated with other data mining techniques. Copyright © 2006 by ASME.

关键词： Pattern matching

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