Open Access. Powered by Scholars. Published by Universities.®

Operations Research, Systems Engineering and Industrial Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 25 of 25

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

Impact Of Demand Response On Thermal Generation Investment With High Wind Penetration, Shan Jin, Audun Botterud, Sarah M. Ryan Nov 2013

Impact Of Demand Response On Thermal Generation Investment With High Wind Penetration, Shan Jin, Audun Botterud, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

We present a stochastic programming model for investments in thermal generation capacity to study the impact of demand response (DR) at high wind penetration levels. The investment model combines continuous operational constraints and wind scenarios to represent the implications of wind variability and uncertainty at the operational level. DR is represented in terms of linear price-responsive demand functions. A numerical case study based on load and wind profiles of Illinois is constructed with 20 candidate generating units of various types. Numerical results show the impact of DR on both investment and operational decisions. We also propose a model in which ...


Supply Chain Design And Operational Planning Models For Biomass To Drop-In Fuel Production, Leilei Zhang, Guiping Hu Nov 2013

Supply Chain Design And Operational Planning Models For Biomass To Drop-In Fuel Production, Leilei Zhang, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

Renewable fuel is playing an increasingly important role as a substitute for fossil based energy. The US Department of Energy (DOE) has identified pyrolysis based platforms as promising biofuel production pathways. In this paper, we present a general biofuel supply chain model with a Mixed Integer Linear Programming (MILP) methodology to investigate the biofuel supply chain facility location, facility capacity at strategic levels, and biofuel production decisions at operational levels. In the model, we accommodate different biomass supplies and biofuel demands with biofuel supply shortage penalty and storage cost. The model is then applied to corn stover fast pyrolysis pathway ...


Aiero: An Algorithm For Identifying Engineering Relationships In Ontologies, Paul Witherell, Ian R. Grosse, Sundar Krishnamurty, Jack C. Wileden Oct 2013

Aiero: An Algorithm For Identifying Engineering Relationships In Ontologies, Paul Witherell, Ian R. Grosse, Sundar Krishnamurty, Jack C. Wileden

Center for e-Design Publications

Semantic technologies are playing an increasingly popular role as a means for advancing the capabilities of knowledge management systems. Among these advancements, researchers have successfully leveraged semantic technologies, and their accompanying techniques, to improve the representation and search capabilities of knowledge management systems. This paper introduces a further application of semantic techniques. We explore semantic relatedness as a means of facilitating the development of more “intelligent” engineering knowledge management systems. Using semantic relatedness quantifications to analyze and rank concept pairs, this novel approach exploits semantic relationships to help identify key engineering relationships, similar to those leveraged in change management systems ...


Comparison Of Design Approaches Between Engineers And Industrial Designers, Seda Yilmaz, Shanna R. Daly, Colleen Seifert, Rich Gonzalez Sep 2013

Comparison Of Design Approaches Between Engineers And Industrial Designers, Seda Yilmaz, Shanna R. Daly, Colleen Seifert, Rich Gonzalez

Industrial Design Conference Presentations, Posters and Proceedings

Design Heuristics are an idea generation tool based on empirical evidence from successful designs. The heuristics serve as cognitive “shortcuts” that encourage exploration of novel directions during concept generation. Design Heuristics were identified from an analysis of hundreds of innovative products and from studies of expert engineering and industrial designers. The research reported in this paper examines the utility of Design Heuristics instruction in two different classroom settings with engineering and industrial design students. The aim was to test whether design heuristics can play a useful role in creating new designs and overcoming fixations in the design process. Twenty novice ...


Broadening Participation: A Report On A Series Of Workshops Aimed At Building Community And Increasing The Number Of Women And Minorities In Engineering Design, Katherine Fu, Tahira N. Reid, Janis P. Terpenny, Deborah Thurston, Judy M. Vance, Susan Finger, Gloria J. Wiens, Kazem Kazerounian, Janet Katherine Allen, Kathy Jacobson Jun 2013

Broadening Participation: A Report On A Series Of Workshops Aimed At Building Community And Increasing The Number Of Women And Minorities In Engineering Design, Katherine Fu, Tahira N. Reid, Janis P. Terpenny, Deborah Thurston, Judy M. Vance, Susan Finger, Gloria J. Wiens, Kazem Kazerounian, Janet Katherine Allen, Kathy Jacobson

Mechanical Engineering Conference Presentations, Papers, and Proceedings

Despite some progress in increasing the numbers of women and minorities in engineering over the past 30 years, their full participation in the discipline has yet to be achieved, particularly in engineering academia. One cause is the "leaky pipeline"; even after women and minorities choose to major in engineering, they drop out at rates higher than their counterparts along all career stages (undergraduate school, graduate school, tenure-track, etc.). Their small numbers creates isolation that has the unfortunate risks of struggle, less professional success, less sense of personal belonging, and less retention. Our hypothesis is that building a community that provides ...


Capturing Cognitive Fingerprints From Keystroke Dynamics, J. Morris Chang, Chi-Chen Fang, Kuan-Hsing Ho, Norene Kelly, Pei-Yuan Wu, Yixiao Ding, Chris Chu, Stephen B. Gilbert, Amed E. Kamal, Sun-Yuan Kung Jun 2013

Capturing Cognitive Fingerprints From Keystroke Dynamics, J. Morris Chang, Chi-Chen Fang, Kuan-Hsing Ho, Norene Kelly, Pei-Yuan Wu, Yixiao Ding, Chris Chu, Stephen B. Gilbert, Amed E. Kamal, Sun-Yuan Kung

Industrial and Manufacturing Systems Engineering Publications

Conventional authentication systems identify a user only at the entry point. Keystroke dynamics can continuously authenticate users by their typing rhythms without extra devices. This article presents a new feature called cognitive typing rhythm (CTR) to continuously verify the identities of computer users. Two machine techniques, SVM and KRR, have been developed for the system. The best results from experiments conducted with 1,977 users show a false-rejection rate of 0.7 percent and a false-acceptance rate of 5.5 percent. CTR therefore constitutes a cognitive fingerprint for continuous. Its effectiveness has been verified through a large-scale dataset. This article ...


Cure Kinetics Characterization And Monitoring Of An Epoxy Resin Using Dsc, Raman Spectroscopy, And Dea, Ricky Hardis, Julie L.P. Jessop, Frank E. Peters, Michael R. Kessler Jun 2013

Cure Kinetics Characterization And Monitoring Of An Epoxy Resin Using Dsc, Raman Spectroscopy, And Dea, Ricky Hardis, Julie L.P. Jessop, Frank E. Peters, Michael R. Kessler

Industrial and Manufacturing Systems Engineering Publications

The use of thick sections of fiber-reinforced polymers (FRPs) is increasing for numerous industrial applications such as wind turbine blades. In situ cure monitoring is very important to directly observe the cure process of FRPs during the manufacturing process. In this work, Raman spectroscopy and dielectric analysis (DEA) are investigated for in situ cure monitoring of an epoxy resin. The cure behavior is first characterized using differential scanning calorimetry (DSC) as a baseline comparison, and the best-fit phenomenological reaction model is determined to describe the cure behavior of the epoxy resin as well as the kinetic parameters. The relationship between ...


Full Virtual Reality Vs. Integrated Virtual Reality Training In Welding, Richard T. Stone, Elease Mclaurin, Peihan Zhong, Kristopher Patrick Watts Jun 2013

Full Virtual Reality Vs. Integrated Virtual Reality Training In Welding, Richard T. Stone, Elease Mclaurin, Peihan Zhong, Kristopher Patrick Watts

Industrial and Manufacturing Systems Engineering Publications

This study demonstrates that both fully virtual and virtual reality (VR) integrated into real-world training programs are appropriate for use in the domain of welding training, depending on the level of task difficulty. Performance differences were virtually indistinguishable between participants in the fully virtual and the integrated training group at the low and medium weld difficulty levels. At the highest level of difficulty, it became apparent that the VR system was no longer solely sufficient for training. This study also tracked the usage patterns for the visual aids used in the VR simulator. These optional aids were presented to the ...


Regional Differences In The Economic Feasibility Of Advanced Biorefineries: Fast Pyrolysis And Hydroprocessing, Tristan Brown, Rajeeva Thilakaratne, Robert C. Brown, Guiping Hu Jun 2013

Regional Differences In The Economic Feasibility Of Advanced Biorefineries: Fast Pyrolysis And Hydroprocessing, Tristan Brown, Rajeeva Thilakaratne, Robert C. Brown, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

This analysis identifies the sensitivity of the fast pyrolysis and hydroprocessing pathway to facility location. The economic feasibility of a 2000 metric ton per day fast pyrolysis and hydroprocessing biorefinery is quantified based on 30 different state-specific facility locations within the United States. We calculate the 20-year internal rate of return (IRR) and net present value (NPV) for each location scenario as a function of state- and region-specific factors. This analysis demonstrates that biorefinery IRR and NPV are very sensitive to bio-oil yield, feedstock cost, location capital cost factor, and transportation fuel market value. The IRRs and NPVs generated for ...


Techno-Economic Analysis Of Fast Pyrolysis And Upgrading Facilities Employing Two Depolymerization Pathways, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown Jun 2013

Techno-Economic Analysis Of Fast Pyrolysis And Upgrading Facilities Employing Two Depolymerization Pathways, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown

Industrial and Manufacturing Systems Engineering Publications

We evaluate the economic feasibility of fast pyrolysis and upgrading facilities 11 employing either of two depolymerization pathways: two-stage hydrotreating 12 followed by a FCC (fluid catalytic cracking) stage or single-stage hydrotreating 13 followed by a hydrocracking stage. In the hydrotreating/FCC pathway, two options 14 are available as the hydrogen source for hydrotreating: merchant hydrogen or 15 hydrogen from natural gas reforming. The primary products of the hydrotreating/FCC 16 pathway are commodity chemicals whereas the primary products for the 17 hydrotreating/hydrocracking pathway are transportation fuels and hydrogen. The two 18 pathways are modeled using Aspen Plus® for ...


Evaluation Of Bimanual Stretched-String Single Object Manipulation For Virtual Assembly With Haptics, Vikram Vyawahare, Richard Stone Apr 2013

Evaluation Of Bimanual Stretched-String Single Object Manipulation For Virtual Assembly With Haptics, Vikram Vyawahare, Richard Stone

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

This research attempts to improve the spatial interaction in virtual assembly with a focus on bimanual object manipulation. Using a unique combination of spatial interaction devices namely a kinesthetic haptic device (Phantom Omni®) and a magnetically tracked device (Razor Hydra) each held in one of the user hands; a new interaction technique named ‘Bimanual Stretched-String Single Object Manipulation’ (BS-SSOM) was developed [1]. The BS-SSOM technique decouples positioning and orientation of objects during bimanual single object manipulation in virtual assembly. The distance between the two hands can be varied to control the precision of manipulation. The simulation uses Voxmap Pointshell [2 ...


Techno-Economic Analysis Of Biomass To Transportation Fuels And Electricity Via Fast Pyrolysis And Hydroprocessing, Tristan Brown, Guiping Hu Apr 2013

Techno-Economic Analysis Of Biomass To Transportation Fuels And Electricity Via Fast Pyrolysis And Hydroprocessing, Tristan Brown, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

A previous Iowa State University (ISU) analysis published in 2010 investigated the technical and economic feasibility of the fast pyrolysis and hydroprocessing of biomass, and concluded that the pathway could produce cellulosic biofuels for a minimum fuel selling price (MFSP) of $2.11/gal. The 2010 ISU study was largely theoretical in that no commercial-scale fast pyrolysis facilities were being constructed at the time of publication.

The present analysis expands upon the 2010 ISU study by performing an updated techno-economic analysis of the fast pyrolysis and hydroprocessing pathway. Recent advances in pathway technology and commercialization and new parameters suggested by ...


Comparative Techno-Economic Analysis Of Biohydrogen Production Via Bio-Oil Gasification And Bio-Oil Reforming, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown Apr 2013

Comparative Techno-Economic Analysis Of Biohydrogen Production Via Bio-Oil Gasification And Bio-Oil Reforming, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown

Industrial and Manufacturing Systems Engineering Publications

This paper evaluates the economic feasibility of biohydrogen production via two bio-oil processing pathways: bio-oil gasification and bio-oil reforming. Both pathways employ fast pyrolysis to produce bio-oil from biomass stock. The two pathways are modeled using Aspen Plus® for a 2000 t d-1 facility. Equipment sizing and cost calculations are based on Aspen Economic Evaluation® software. Biohydrogen production capacity at the facility is 147 t d-1 for the bio-oil gasification pathway and 160 t d-1 for the bio-oil reforming pathway. The biomass-to-fuel energy efficiencies are 47% and 84% for the bio-oil gasification and bio-oil reforming pathways, respectively. Total capital investment ...


Medial Knee Joint Loading During Stair Ambulation And Walking While Carrying Loads, Michelle Hall, Elizabeth R. Boyer, Jason C. Gillette, Gary A. Mirka Mar 2013

Medial Knee Joint Loading During Stair Ambulation And Walking While Carrying Loads, Michelle Hall, Elizabeth R. Boyer, Jason C. Gillette, Gary A. Mirka

Industrial and Manufacturing Systems Engineering Publications

Carrying loads while walking or using stairs is a common activity of daily living. Knee osteoarthritis is associated with increased external knee adduction moment (KAM) during walking, so understanding how the additional challenges of stairs and carrying loads impact these moments is of value. Sixteen healthy individuals performed three types of MOTION (walking, stair ascent, stair descent) under three LOAD conditions (no load, carrying a 13.6 kg front load, carrying 13.6 kg load in a backpack). Three-dimensional gait analysis was used to measure KAM. Results of ANOVA showed a significant main effect of both MOTION and LOAD on ...


A New Approximation Method For Generating Day-Ahead Load Scenarios, Yonghan Feng, Dinakar Gade, Sarah M. Ryan, Jean-Paul Watson, Roger J.B. Wets, David L. Woodruff Jan 2013

A New Approximation Method For Generating Day-Ahead Load Scenarios, Yonghan Feng, Dinakar Gade, Sarah M. Ryan, Jean-Paul Watson, Roger J.B. Wets, David L. Woodruff

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Unit commitment decisions made in the day-ahead market and resource adequacy assessment processes are based on forecasts of load, which depends strongly on weather. Two major sources of uncertainty in the load forecast are the errors in the day-ahead weather forecast and the variability in temporal patterns of electricity demand that is not explained by weather. We develop a stochastic model for hourly load on a given day, within a segment of similar days, based on a weather forecast available on the previous day. Identification of similar days in the past is based on weather forecasts and temporal load patterns ...


Toward Scalable, Parallel Progressive Hedging For Stochastic Unit Commitment, Sarah M. Ryan, Roger J.B. Wetts, David L. Woodruff Jan 2013

Toward Scalable, Parallel Progressive Hedging For Stochastic Unit Commitment, Sarah M. Ryan, Roger J.B. Wetts, David L. Woodruff

Industrial and Manufacturing Systems Engineering Conference Proceedings and Posters

Abstract: Given increasing penetration of variable generation units, there is significant interest in the power systems research community concerning the development of solution techniques that directly address the stochasticity of these sources in the unit commitment problem. Unfortunately, despite significant attention from the research community, stochastic unit commitment solvers have not made their way into practice, due in large part to the computational difficulty of the problem. In this paper, we address this issue, and focus on the development of a decomposition scheme based on the progressive hedging algorithm of Rockafellar and Wets. Our focus is on achieving solve times ...


An Integrated Approach To Information Modeling For The Sustainable Design Of Products, Douglas C. Eddy, Sundar Krishnamurty, Ian R. Grosse, Jack C. Wileden, Paul Witherell, Kemper E. Lewis Jan 2013

An Integrated Approach To Information Modeling For The Sustainable Design Of Products, Douglas C. Eddy, Sundar Krishnamurty, Ian R. Grosse, Jack C. Wileden, Paul Witherell, Kemper E. Lewis

Center for e-Design Proceedings

The design of more sustainable products can be best accomplished in a tradeoff-based design process that methodically handles conflicting objectives. Such conflicts are often seen between, environmental impact, cost, and product performance. To support such a process, we propose the development of an environment where sustainability considerations are explicitly introduced early into the design process. This explicitness is provided by integrating the requirements information of sustainability standards and regulations directly into the design process. The emergence of the semantic web provides an interoperable environment in which the context and meaning of knowledge about the relationships among various domains can be ...


Visual Inspection Of Casting Surfaces, Frank E. Peters, Richard T. Stone, Kristopher Patrick Watts, Peihan Zhong, Alexander John Clemons Jan 2013

Visual Inspection Of Casting Surfaces, Frank E. Peters, Richard T. Stone, Kristopher Patrick Watts, Peihan Zhong, Alexander John Clemons

Industrial and Manufacturing Systems Engineering Publications

Visual inspection of casting surfaces is a critical processing step in the metalcasting process. Measurement error can be significant, causing overprocessing or poor quality received by the customer. Many factors affect the human operator's ability to effectively inspect castings. Cognitive ability is one such factor, which can be identified through a simple test. Rastering training was shown to improve the percentage of casting surface which gets inspected. Discrimination between acceptable and unacceptable surfaces continues to be problematic.


Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu Jan 2013

Market Competition And Social Welfare Analysis For E10 And E85 With A 1 Game Theory Model, Minwen Yang, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

With the increasing concerns about the petroleum reserve, and the global warming, people have been looking for renewable and environmental friendly energy sources to supplement and replace fossil fuels. Ethanol has been an appropriate substitute to fossil fuels. Currently, E10 and E85 are two of the main transportation fuels with ethanol and they are competing in the market. This study investigates the competition between E10 and E85 with an oligopoly Cournot model and derives three indicators from the equilibrium to measure the performance of the market: E85's market share, E85 price premium which indicate the consumers' additional willingness to ...


Techno-Economic Analysis Of Monosaccharide Production Via Biomass Fast Pyrolysis, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown Jan 2013

Techno-Economic Analysis Of Monosaccharide Production Via Biomass Fast Pyrolysis, Yanan Zhang, Tristan Brown, Guiping Hu, Robert C. Brown

Industrial and Manufacturing Systems Engineering Publications

The economic feasibility of a facility producing monosaccharides, hydrogen and transportation fuels via fast pyrolysis and upgrading pathway was evaluated by modeling a 2000 dry metric ton biomass/day facility using Aspen Plus®. Equipment sizing and cost were based on Aspen Economic Evaluation® software. The results indicate that monosaccharide production capacity could reach 338 metric tons/day. Co-product yields of hydrogen and gasoline were 23.4 and 141 metric tons/day, respectively. The total installed equipment and total capital costs were estimated to be $210 million and $326 million, respectively. A facility internal rate of return (IRR) of 11.4 ...


Optimization Models For Biorefinery Supply Chain Network Design Under Uncertainty, Narges Kazemzadeh, Guiping Hu Jan 2013

Optimization Models For Biorefinery Supply Chain Network Design Under Uncertainty, Narges Kazemzadeh, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

Biofuel industry has attracted much attention due to its potential to reduce dependency on fossil fuels and contribute to the renewable energy. The high levels of uncertainty in feedstock yield, market prices, production costs, and many other parameters are among the major challenges in this industry. This challenge has created an ongoing interest on studies considering different aspects of uncertainty in investment decisions of the biofuel industry. This study aims to determine the optimal design of supply chain for biofuel refineries in order to maximize annual profit considering uncertainties in fuel market price, feedstock yield, and logistic costs. In order ...


Majority Voting By Independent Classifiers Can Increase Error Rates, Stephen B. Vardeman, Max Morris Jan 2013

Majority Voting By Independent Classifiers Can Increase Error Rates, Stephen B. Vardeman, Max Morris

Industrial and Manufacturing Systems Engineering Publications

The technique of “majority voting” of classifiers is used in machine learning with the aim of constructing a new combined classification rule that has better characteristics than any of a given set of rules. The “Condorcet Jury Theorem” is often cited, incorrectly, as support for a claim that this practice leads to an improved classifier (i.e., one with smaller error probabilities) when the given classifiers are sufficiently good and are uncorrelated. We specifically address the case of two-category classification, and argue that a correct claim can be made for independent (not just uncorrelated) classification errors (not the classifiers themselves ...


Life Cycle Assessment Of The Production Of Hydrogen And Transportation Fuels From Corn Stover Via Fast Pyrolysis, Yanan Zhang, Guiping Hu, Robert C. Brown Jan 2013

Life Cycle Assessment Of The Production Of Hydrogen And Transportation Fuels From Corn Stover Via Fast Pyrolysis, Yanan Zhang, Guiping Hu, Robert C. Brown

Industrial and Manufacturing Systems Engineering Publications

This life cycle assessment evaluates and quantifies the environmental impacts of the production of hydrogen and transportation fuels from the fast pyrolysis and upgrading of corn stover. Input data for this analysis come from Aspen Plus modeling, a GREET (Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation) model database and a US Life Cycle Inventory Database. SimaPro 7.3 software is employed to estimate the environmental impacts. The results indicate that the net fossil energy input is 0.25 MJ and 0.23 MJ per km traveled for a light-duty vehicle fueled by gasoline and diesel fuel, respectively. Bio-oil ...


Scenario Construction And Reduction Applied To Stochastic Power Generation Expansion Planning, Yonghan Feng, Sarah M. Ryan Jan 2013

Scenario Construction And Reduction Applied To Stochastic Power Generation Expansion Planning, Yonghan Feng, Sarah M. Ryan

Industrial and Manufacturing Systems Engineering Publications

A challenging aspect of applying stochastic programming in a dynamic setting is to construct a set of discrete scenarios that well represents multivariate stochastic processes for uncertain parameters. Often this is done by generating a scenario tree using a statistical procedure and then reducing its size while maintaining its statistical properties. In this paper, we test a new scenario reduction heuristic in the context of long-term power generation expansion planning. We generate two different sets of scenarios for future electricity demands and fuel prices by statistical extrapolation of long-term historical trends. The cardinality of the first set is controlled by ...


Assessment And Evaluation Of Objectives And Outcomes For Continuous Improvement Of An Industrial Engineering Program, Kyung J. Min, John K. Jackman, Douglas D. Gemmill Jan 2013

Assessment And Evaluation Of Objectives And Outcomes For Continuous Improvement Of An Industrial Engineering Program, Kyung J. Min, John K. Jackman, Douglas D. Gemmill

Industrial and Manufacturing Systems Engineering Publications

In recent years, ABET accreditation has placed a heavy emphasis not only on the assessment of objectives and outcomes, but also on the evaluation of them and subsequent efforts for continuous improvement based on such an evaluation. Currently, a plethora of assessment tools and conceptual frameworks notwithstanding, there exists a relative paucity of documented efforts on the actual evaluation and subsequent continuous improvement. In this paper, we first concretely (1) show how such assessment and evaluation can be deliberately and systematically conducted in the context of an Industrial Engineering program. We then (2) show how the results of the objectives ...