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Operations Research, Systems Engineering and Industrial Engineering Commons

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Iowa State University

2012

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Articles 1 - 30 of 30

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Evaluating Program Outcomes Via Decision Making Simulations, Steven A. Freeman, Nir Keren Nov 2012

Evaluating Program Outcomes Via Decision Making Simulations, Steven A. Freeman, Nir Keren

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Decision making-based methodology was proposed for evaluating program outcomes. The methodology was tested to measure the effect of safety enhancing curriculum on Safety Awareness, one of the 15 competencies ABE is using in program outcome evaluations. The results indicated a significant increase in safety awareness and shift in cognitive processes following implementation of the curriculum. Since ABE measures competencies via supervisory evaluation of graduates, the authors examine the opportunity of developing a longitudinal study for measuring the magnitude of impact of curriculum on outcomes at the workplace.


Factors Considered In The Development Of Curricular Content In Engineering Technology For Diverse Audiences, Gretchen A. Mosher, Chad M. Laux Nov 2012

Factors Considered In The Development Of Curricular Content In Engineering Technology For Diverse Audiences, Gretchen A. Mosher, Chad M. Laux

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Supply chains which handle and process bulk materials such as food ingredients and food stuffs have unique needs and challenges. Bulk material supply chains are characterized by the aggregation of large, homogeneous lots of product intended for a wide spectrum of end uses. Transportation and storage functions are also completed within a large-scale system, which add complexity to the management of these types of supply chains (Thakur & Hurburgh, 2009). Uncertainty and risk management are especially challenging.

The systems approach of engineering technology offers strategies for managing operations, risk and uncertainty in bulk materials supply chains. Furthermore, engineering technology graduates often ...


Measurement Of Quality-Based Risks In The Bulk Material Supply Chain, Gretchen A. Mosher Nov 2012

Measurement Of Quality-Based Risks In The Bulk Material Supply Chain, Gretchen A. Mosher

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The audience will learn about the process used to identify, quantify, and evaluation quality risks in the bulk material supply chain. Use of the process map will be discussed from a quality management perspective. Implications for industrial practice will be shared.


What We Have Learned About Experience, Time Pressure, And Difficult Tradeoffs From Experiments With Firefighters In Virtual Reality, Nir Keren Nov 2012

What We Have Learned About Experience, Time Pressure, And Difficult Tradeoffs From Experiments With Firefighters In Virtual Reality, Nir Keren

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

In general, attendees will learn that experience does not guarantee faster and more accurate decisions. Furthermore, experienced firefighters demonstrated higher level of threat‐related stress than inexperienced firefighters.


Multiple Two-State Classifier Output Fusion System And Method: Patent Application, Stephen Whitlow, Michael C. Dorneich Oct 2012

Multiple Two-State Classifier Output Fusion System And Method: Patent Application, Stephen Whitlow, Michael C. Dorneich

Industrial and Manufacturing Systems Engineering Patents

A system and method for providing more than two levels of classification distinction of a user state are provided. The first and second general states of a user are sensed. The first general state is classified as either a first state or a second state, and the second general state is classified as either a third state or a fourth state. The user state of the user is then classified as one of at least three different classification states.


Cognitive Aircraft Hazard Advisory Systems And Methods, Donald C. Kauffman, Michael C. Dorneich Sep 2012

Cognitive Aircraft Hazard Advisory Systems And Methods, Donald C. Kauffman, Michael C. Dorneich

Industrial and Manufacturing Systems Engineering Patents

The present invention in its various aspects is as set out in the appended claims. The present invention provides integrated surveillance systems and methods for processing multiple sensor inputs and determining a best route for avoiding multiple hazards.

An example method performed on a first aircraft includes generating a plurality of routes for avoiding a previously determined alert from a first advisory system. Then, probability of success information is generated at other advisory systems for each of the plurality of routes. The best route of the plurality of routes is determined based on the generated probabilities and output to the ...


Creating Implants From Allograft Bone Using Subtractive Rapid Prototyping, Matthew C. Frank, Ashish Mukund Joshi, Shuangyan Lei, Donald D. Anderson, Yuki Tochigi, Thomas D. Brown Aug 2012

Creating Implants From Allograft Bone Using Subtractive Rapid Prototyping, Matthew C. Frank, Ashish Mukund Joshi, Shuangyan Lei, Donald D. Anderson, Yuki Tochigi, Thomas D. Brown

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

This research involves the development of rapid manufacturing for bone implants using human allograft bone in a Subtractive Rapid Prototyping process. Using CT-derived CAD models of missing bone due to high energy trauma or tumor resection, surgical reconstruction could be improved with custom rapid implants made from natural bone. The bone “stock” material is of arbitrary shape and material distribution in the form of frozen donated cadaveric bones. Each is unique in shape and has highly anisotropic material properties; likewise for each final bone implant geometry and its material distribution. This work utilizes a PLY input file, instead of the ...


Computing Axes Of Rotation For Setup Planning Using Visibility Of Polyhedral Computer-Aided Design Models, Ye Li, Matthew C. Frank Aug 2012

Computing Axes Of Rotation For Setup Planning Using Visibility Of Polyhedral Computer-Aided Design Models, Ye Li, Matthew C. Frank

Industrial and Manufacturing Systems Engineering Publications

This paper presents a method for determining feasible axes of rotation for setup planning, based on the visibility of a polyhedral model. The intent of this work was to develop a feature-free approach to setup planning, with the specific focus on multi-axis machine setups. Visibility mapping can provide a quantitative evaluation of a surface, a feature or an entire part model; however, the next step is to use this information for process planning. In this paper, we present an approach of using a visibility map to evaluate axes of rotation that could be used in an indexer-type setup on a ...


Application Of Scenario Reduction To Ldc And Risk Based Generation Expansion Planning, Yonghan Feng, Sarah M. Ryan Jul 2012

Application Of Scenario Reduction To Ldc And Risk Based Generation Expansion Planning, Yonghan Feng, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Abstract: Two-stage stochastic mixed-integer programming models are formulated for minimizing expected cost or Conditional Value-at-Risk (CVaR) of a long-term power generation expansion planning problem incorporating load duration curves. The multivariate stochastic processes, such as electricity demands and fuel prices, are modeled as geometric Brownian motion (GBM) processes. Scenario paths for their future evolution are generated by statistical extrapolation of long-term historical trends. The size of the scenario set is controlled by using increasing length time periods in a tree structure. Nevertheless, some method of scenario thinning is necessary to achieve manageable solution times. To mitigate the computational complexity of the ...


Technoeconomic Sensitivity Of Biobased Hydrocarbon Production Via Fast Pyrolysis To Government Incentive Programs, Tristan Brown, Guiping Hu Jun 2012

Technoeconomic Sensitivity Of Biobased Hydrocarbon Production Via Fast Pyrolysis To Government Incentive Programs, Tristan Brown, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

Fast pyrolysis and upgrading is a promising thermochemical pathway that produces pyrolysis oil that can be upgraded via hydroprocessing into hydrocarbon-based transportation fuels (drop-in biofuels). The internal rate of return (IRR) of a fast pyrolysis and upgrading facility is a function of feedstock cost and projected revenues. We calculate the IRR of a fast pyrolysis and upgrading facility under six different policy scenarios: (1)a baseline scenario in which the facility receives no government support; (2)a scenario in which cap-and-trade (H.R. 2454) is enacted with both carbon price and offsets; (3)a scenario in which the Volumetric Ethanol ...


An Algorithm For Defining The Onset And Cessation Of The Flexion-Relaxation Phenomenon In The Low Back Musculature, Sangeun Jin, Xiaopeng Ning, Gary A. Mirka Jun 2012

An Algorithm For Defining The Onset And Cessation Of The Flexion-Relaxation Phenomenon In The Low Back Musculature, Sangeun Jin, Xiaopeng Ning, Gary A. Mirka

Industrial and Manufacturing Systems Engineering Publications

The flexion-relaxation phenomenon (FRP) in the low back provides insights into the interplay between the active and passive tissues. Establishing a reliable algorithm for defining the lumbar angle at which the muscles deactivate and reactivate was the focus of the current paper. First, the EMG data were processed using six different smoothing techniques (no smoothing, moving average, moving standard deviation, Butterworth low pass filter at 0.5 Hz, 5 Hz, and 50 Hz) herein called the processed EMG (pEMG). The FRP points were then defined using four thresholds (pEMG less than 3% MVC, pEMG less than 5% MVC, pEMG less ...


Describing The Active Region Boundary Of Emg-Assisted Biomechanical Models Of The Low Back, Xiaopeng Ning, Sangeun Jin, Gary A. Mirka Jun 2012

Describing The Active Region Boundary Of Emg-Assisted Biomechanical Models Of The Low Back, Xiaopeng Ning, Sangeun Jin, Gary A. Mirka

Industrial and Manufacturing Systems Engineering Publications

Background

Electromyography-assisted (EMG-assisted) biomechanical models are used to characterize the muscle and joint reaction forces in the lumbar region. However, during a full-range trunk flexion, there is a transition of extension moment from the trunk extensor muscles to the passive tissues of the low back, indicating that the empirical EMG data used to drive these EMG-assisted models becomes less correlated with the extensor moment. The objectives of this study were to establish the trunk flexion angles at which the passive tissues generate substantial trunk extension moment and to document how these angles change with asymmetry.

Methods

Participants performed controlled trunk ...


How Do Design Heuristics Affects Outcomes?, Seda Mckilligan, L. Christian, Shanna R. Daly, Colleen M. Seifert, Richard Gonzalez May 2012

How Do Design Heuristics Affects Outcomes?, Seda Mckilligan, L. Christian, Shanna R. Daly, Colleen M. Seifert, Richard Gonzalez

Industrial Design Conference Presentations, Posters and Proceedings

How do designers explore design solution spaces? The typical paradigm underlying design education is project-based learning focusing on solving design problems. However, this learning approach provides open-ended design tasks for students to work on through the entire process of design. It assumes a high level of independent learning within the specific project context, and require students to transfer lessons learned to new design problems [Pietersen 2002]. When students later face a new unstructured, ambiguous design problem, they may find it challenging to apply lessons from prior project experiences. The critique method is often used to help students think more critically ...


Using Industry To Drive Continuous Improvement In Capstone Design, Leslie Potter May 2012

Using Industry To Drive Continuous Improvement In Capstone Design, Leslie Potter

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Iowa State University’s Industrial and Manufacturing Systems Engineering (IMSE) Department has been teaching and practicing continuous improvement for many years. Since 2003, a formal process for curriculum assessment related to ABET outcome items [a-k] and departmental outcome items [l-p] has been in place. This process has provided structure for obtaining, documenting, and using feedback from stakeholders, including students, alumni, faculty, and industry. Quantitative feedback is received through stakeholder surveys and outcome item assessment. Qualitative feedback is received from capstone design industry partners, alumni working in industry, and the IMSE Industrial Advisory Board. The IMSE capstone design course (IE441) has ...


The Right View From The Wrong Location: Depth Perception In Stereoscopic Multi-User Virtual Environments, Brice Pollock, Melissa Burton, Jonathan W. Kelly, Stephen B. Gilbert, Eliot H. Winer Apr 2012

The Right View From The Wrong Location: Depth Perception In Stereoscopic Multi-User Virtual Environments, Brice Pollock, Melissa Burton, Jonathan W. Kelly, Stephen B. Gilbert, Eliot H. Winer

Industrial and Manufacturing Systems Engineering Publications

Stereoscopic depth cues improve depth perception and increase immersion within virtual environments (VEs). However, improper display of these cues can distort perceived distances and directions. Consider a multi-user VE, where all users view identical stereoscopic images regardless of physical location. In this scenario, cues are typically customized for one "leader" equipped with a head-tracking device. This user stands at the center of projection (CoP) and all other users ("followers") view the scene from other locations and receive improper depth cues. This paper examines perceived depth distortion when viewing stereoscopic VEs from follower perspectives and the impact of these distortions on ...


Mixed-Initiative Transfer Of Datalink-Based Information: Patent Application, Michael C. Dorneich, Stephen Whitlow, William Rogers Mar 2012

Mixed-Initiative Transfer Of Datalink-Based Information: Patent Application, Michael C. Dorneich, Stephen Whitlow, William Rogers

Industrial and Manufacturing Systems Engineering Patents

A system and method are provided for transferring datalink-based information into an aircraft flight management system. When a datalink message is received in an aircraft, it is parsed into individual information elements. The operational impact of the received datalink message on the aircraft is determined from the individual information elements. A method of supplying pilot feedback regarding the received datalink message is determined from the determined operational impact. The pilot feedback regarding the received datalink message is supplied using the determined method. At least selected portions of the individual information elements are selectively transferred into the aircraft flight management system ...


Workload Management System And Method, Michael C. Dorneich, William Rogers, Stephen Whitlow, Chris Hamblin, Claudia Keinrath Mar 2012

Workload Management System And Method, Michael C. Dorneich, William Rogers, Stephen Whitlow, Chris Hamblin, Claudia Keinrath

Industrial and Manufacturing Systems Engineering Patents

A system and method are provided for facilitating workload management. The system processes first sensor data to estimate the current cognitive state of a first person, and processes second sensor data to estimate the current cognitive state of a second person. Information representative of the estimates of the current cognitive states of the first person and the second person is simultaneously rendered on a display device.


Datalink Message Prioritization System And Method: Patent Application, Stephen Whitlow, Michael C. Dorneich, William Rogers, Chris Hamblin, Claudia Keinrath, Thea L. Feyereisen Mar 2012

Datalink Message Prioritization System And Method: Patent Application, Stephen Whitlow, Michael C. Dorneich, William Rogers, Chris Hamblin, Claudia Keinrath, Thea L. Feyereisen

Industrial and Manufacturing Systems Engineering Patents

A system and method are provided for prioritizing incoming datalink messages. When a datalink message is received in an aircraft, it is parsed into individual information elements. The relevance of the received datalink message is then assessed from the individual information elements. The received datalink message is then categorized into one of a plurality of playback priority categories, based on the assessed relevance of the received datalink message.


Aircraft Situational Awareness Improvement System And Method: Patent Application, Chris Hamblin, Stephen Whitlow, Michael C. Dorneich, William Rogers Mar 2012

Aircraft Situational Awareness Improvement System And Method: Patent Application, Chris Hamblin, Stephen Whitlow, Michael C. Dorneich, William Rogers

Industrial and Manufacturing Systems Engineering Patents

A system and method are provided for improving aircraft pilot situational awareness. When datalink messages and/or automatic dependent surveillance-broadcast (ADS-B) data and/or various other data are received in the aircraft, the received data are processed to generate a spatial and temporal situational model for the aircraft. At least a portion of the spatial and temporal situational model is rendered on a display device within the aircraft.


Perception Of Presence In A Mixed-Reality Training Environment, Stephen B. Gilbert, Jason Pontius, Norene Kelly, Julio De La Cruz, Hector Gonzalez Mar 2012

Perception Of Presence In A Mixed-Reality Training Environment, Stephen B. Gilbert, Jason Pontius, Norene Kelly, Julio De La Cruz, Hector Gonzalez

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Ground troop training within the Army typically involves three kinds of training: live mission rehearsal, virtual or simulated training exercises (e.g., within a Humvee simulator), and constructive training, in which warfighters battle artificially intelligent enemies in a video game format. Some leading edge training missions merge these formats to offer full LVC training (live, virtual, constructive) in a mixed-reality environment in which trainees rehearse in a physically immersive setting that is augmented with simulated constructive entities and integrated with virtual entities controlled by trainees at other locations. In this pilot study, a number of human factors that contribute to ...


A Lower Bound On Proximity Preservation By Space Filling Curves, Pan Xu, Srikanta Tirthapura Jan 2012

A Lower Bound On Proximity Preservation By Space Filling Curves, Pan Xu, Srikanta Tirthapura

Electrical and Computer Engineering Conference Papers, Posters and Presentations

Abstract: A space filling curve (SFC) is a proximity preserving mapping from a high dimensional space to a single dimensional space. SFCs have been used extensively in dealing with multi-dimensional data in parallel computing, scientific computing, and databases. The general goal of an SFC is that points that are close to each other in high-dimensional space are also close to each other in the single dimensional space. While SFCs have been used widely, the extent to which proximity can be preserved by an SFC is not precisely understood yet. We consider natural metrics, including the "nearest-neighbor stretch" of an SFC ...


Engineering Design Education - Core Competencies, Richard M. Goff, Janis P. Terpenny Jan 2012

Engineering Design Education - Core Competencies, Richard M. Goff, Janis P. Terpenny

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

In the past, it was very common for students to come to the university to study engineering with basic design and build skills acquired through hands-on experiences acquired through play with friends, work on farms, work on cars and general tinkering. Engineering students were predominantly white males and eager to dive into design projects that could call upon skills in spatial reasoning, problem solving, working with others, and more. Currently, students who enter the university to study engineering are more diverse in race, gender, and background. The pervasiveness of computers, computer gaming, and social networking has also shifted the competencies ...


Lvc Interaction Within A Mixed Reality Training System, Brian Pollock, Eliot H. Winer, Stephen B. Gilbert, Julio De La Cruz Jan 2012

Lvc Interaction Within A Mixed Reality Training System, Brian Pollock, Eliot H. Winer, Stephen B. Gilbert, Julio De La Cruz

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

The United States military is increasingly pursuing advanced live, virtual, and constructive (LVC) training systems for reduced cost, greater training flexibility, and decreased training times. Combining the advantages of realistic training environments and virtual worlds, mixed reality LVC training systems can enable live and virtual trainee interaction as if co-located. However, LVC interaction in these systems often requires constructing immersive environments, developing hardware for live-virtual interaction, tracking in occluded environments, and an architecture that supports real-time transfer of entity information across many systems. This paper discusses a system that overcomes these challenges to empower LVC interaction in a reconfigurable, mixed ...


Omniscribe – Enhancing Aar In An Lvc Environment, Alden Peterson, Stephen B. Gilbert, Eliot H. Winer, Jeffrey Welch, Julio De La Cruz, Hector Gonzalez Jan 2012

Omniscribe – Enhancing Aar In An Lvc Environment, Alden Peterson, Stephen B. Gilbert, Eliot H. Winer, Jeffrey Welch, Julio De La Cruz, Hector Gonzalez

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Innovations in live, virtual and constructive (LVC) environments geared for US military joint force training allow a more effective utilization of space and time for training exercises across the globe. As this use becomes more prominent, the need for a suitable after action review (AAR) tool to incorporate an ever-increasing number of data sources is fast becoming a requirement. To perform an AAR fully, data from a variety of input sources must be saved, synchronized, and analyzed. It is important to equip military trainers with an effective tool to facilitate this need for comprehensive data in AARs to maximize the ...


Convocons: A Tool For Building Affinity Among Distributed Team Members, Michael Oren, Stephen B. Gilbert Jan 2012

Convocons: A Tool For Building Affinity Among Distributed Team Members, Michael Oren, Stephen B. Gilbert

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

In this paper we present the result of a user interface designed to increase social affinity between two remote collaborators working on design tasks. The results suggest that the tool is successful in creating an overall affinity that is 14.6% higher than the control group without adding a significant difference in task completion time. Affinity is measured with a framework with demonstrated inter-rater reliability using codes assigned to specific conversational patterns and video recorded interactions. This research approach provides a platform for future work codifying affinity and trust among larger numbers of remote collaborators.


Techno-Economic Analysis Of Biobased Chemicals Production Via Integrated Catalytic Processing, Tristan Brown, Yanan Zhang, Guiping Hu, Robert C. Brown Jan 2012

Techno-Economic Analysis Of Biobased Chemicals Production Via Integrated Catalytic Processing, Tristan Brown, Yanan Zhang, Guiping Hu, Robert C. Brown

Industrial and Manufacturing Systems Engineering Publications

We evaluate the economic feasibility of a fast pyrolysis facility producing biobased commodity chemicals based on various manifestations of Integrated Catalytic Processing (ICP). Five scenarios are analyzed: fluid catalytic cracking (FCC) of whole pyrolysis oil (WPO); one-stage hydrotreating and FCC of WPO; FCC of the aqueous phase of pyrolysis oil (APPO); one-stage hydrotreating and FCC of the APPO; and two-stage hydrotreating followed by FCC of the APPO.

We calculate the internal rate of return (IRR) for each scenario as functions of the costs of feedstock, hydrogen, and catalyst, and projected revenues for the facility. The assumed feedstock cost is $83 ...


An Exit And Entry Study Of Renewable Power Producers: A Real Options Approach, Kyung J. Min, Chenlu Lou, Chung-Hsiao Wang Jan 2012

An Exit And Entry Study Of Renewable Power Producers: A Real Options Approach, Kyung J. Min, Chenlu Lou, Chung-Hsiao Wang

Industrial and Manufacturing Systems Engineering Publications

In recent years, there has been a substantial increase in renewable power production sites. However, such sites operated in the 1980s were often abandoned in the 1990s and their remnants are still visible. Hence, it is highly desirable to understand the exit and entry decisions of such sites. Toward this goal, we formulate and analyze models for such decisions regarding a single site from a real options perspective when the operation and maintenance costs follow a geometric Brownian motion and derive policy implications. An extensive numerical example for a wind farm illustrates some of the key features of this study.


Bayes Inference For A Tractable New Class Of Non-Symmetric Distributions For 3-Dimensional Rotations, Melissa Ann Bingham, Danial J. Nordman, Stephen B. Vardeman Jan 2012

Bayes Inference For A Tractable New Class Of Non-Symmetric Distributions For 3-Dimensional Rotations, Melissa Ann Bingham, Danial J. Nordman, Stephen B. Vardeman

Industrial and Manufacturing Systems Engineering Publications

Both existing models for non-symmetric distributions on 3-dimensional rotations and their associated one-sample inference methods have serious limitations in terms of both interpretability and ease of use. Based on the intuitively appealing Uniform Axis- Random Spin (UARS) construction of Bingham, Nordman, and Vardeman (2009) for symmetric families of distributions, we propose new highly interpretable and tractable classes of non-symmetric distributions that are derived from mixing UARS distributions. These have an appealing Preferred Axis-Random Spin (PARS) construction and (unlike existing models) directly interpretable parameters. Non-informative one-sample Bayes inference in these models is a direct generalization of UARS methods introduced in Bingham ...


Mapping Potential Foodsheds In Iowa: A System Optimization Modeling Approach, Guiping Hu, Randy Boeckenstedt, Lizhi Wang, Susan W. Arendt Jan 2012

Mapping Potential Foodsheds In Iowa: A System Optimization Modeling Approach, Guiping Hu, Randy Boeckenstedt, Lizhi Wang, Susan W. Arendt

Leopold Center Completed Grant Reports

Linear programming tools are used to gauge regional potential for local diversified agriculture required to meet the dietary needs of the population.


Improving The Aerospace Capstone Design Experience Through Simulation Based Learning, Wm. Michael Butler, Janis P. Terpenny, Richard M. Goff, Rajkumar S. Pant, Heidi M. Steinhauer Jan 2012

Improving The Aerospace Capstone Design Experience Through Simulation Based Learning, Wm. Michael Butler, Janis P. Terpenny, Richard M. Goff, Rajkumar S. Pant, Heidi M. Steinhauer

Center for e-Design Publications

A key role of universities is to prepare students to work in their chosen profession upon completion of their degree program. Engineering capstone design courses are often the only required courses that challenge students to draw on nearly all of the students’ previous collegiate learning experiences and to synthesize and apply these to creating a new solution to an engineering problem. Aside from internship and co-op experiences, these are often the first courses that expose engineering students to some of the technical and political issues that they will often face in their professional engineering careers. Industry often looks at these ...