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Operations Research, Systems Engineering and Industrial Engineering Commons™
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Articles 1 - 26 of 26
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Examination And Utilization Of Rare Features In Text Classification Of Injury Narratives, Hsin-Ying Huang
Examination And Utilization Of Rare Features In Text Classification Of Injury Narratives, Hsin-Ying Huang
Open Access Dissertations
Thanks to the advances in computing and information technology, analyzing injury surveillance data with statistical machine learning methods has grown in popularity, complexity, and quality over recent years. During that same time, researchers have recognized the limitations of statistical text analysis with limited training data. In response to the two primary challenges for statistical text analysis, dimensionality reduction and sparse data, many studies have focused on improving machine learning algorithms. Less research has been done, though, to examine and improve statistical machine learning methods in text classification from a linguistic perspective.
This study addresses this research gap by examining the …
Impact Of Rfid Information-Sharing Coordination Over A Supply Chain With Reverse Logistics, Juan Jose Nativi Nicolau
Impact Of Rfid Information-Sharing Coordination Over A Supply Chain With Reverse Logistics, Juan Jose Nativi Nicolau
Open Access Dissertations
Companies have adopted environmental practices such as reverse logistics over the past few decades. However, studies show that aligning partners inside the green supply chain can be a substantial problem. This lack of coordination can increase overall supply chain cost. Information technology such as Radio Frequency Identification (RFID) has the potential to enable decentralized supply chain coordinate their information. Even though there are research that address RFID on traditional supply chain, few researches address how to coordinate RFID information sharing in a green supply chain. We study, through simulation experiments, two types of RFID information-sharing coordination under different configurations related …
Adaptive Sampling Trust-Region Methods For Derivative-Based And Derivative-Free Simulation Optimization Problems, Sara Shashaani
Adaptive Sampling Trust-Region Methods For Derivative-Based And Derivative-Free Simulation Optimization Problems, Sara Shashaani
Open Access Dissertations
We consider unconstrained optimization problems where only “stochastic” estimates of the objective function are observable as replicates from a Monte Carlo simulation oracle. In the first study we assume that the function gradients are directly observable through the Monte Carlo simulation. We propose ASTRO, which is an adaptive sampling based trust-region optimization method where a stochastic local model is constructed, optimized, and updated iteratively. ASTRO is a derivative-based algorithm and provides almost sure convergence to a first-order critical point with good practical performance. In the second study the Monte Carlo simulation is assumed to provide no direct observations of the …
Metrics Of Critical Pair Identification, Zixu Zhang
Metrics Of Critical Pair Identification, Zixu Zhang
Open Access Theses
Critical Pair Identification works as a potential assistive tool for human air traffic controllers by identifying potentially dangerous situations that are not detected by proposed automated separation assurance systems. This concept specifically considers conflicts that might arise if aircraft unexpectedly deviate from their planned flight path in the near future. Five metrics of the critical pair concept, Critical Pair Count, Time to Risk Exposure, Lead Time, Risk Exposure Duration and Blunder Sensitivity Index, have been developed and mathematically defined to characterize the safety level of an aircraft pair or a volume of air space. Algorithm that computes proposed metrics is …
Taming Tail Latency For Erasure-Coded, Distributed Storage Systems, Jingxian Fan
Taming Tail Latency For Erasure-Coded, Distributed Storage Systems, Jingxian Fan
Open Access Theses
Nowadays, in distributed storage systems, long tails of responsible time are of particular concern. Modern large companies like Bing, Facebook and Amazon Web Service show that 99.9th percentile response times being orders of magnitude worse than the mean. With the advantages of maintaining high data reliability and ensur- ing enough space eciency, erasure code has become a popular storage method in distributed storage systems. However, due to the lack of mathematical models for analyzing erasure-coded based distributed storage systems, taming tail latency is still an open problem.
In this research, we quantify tail latency in such systems by deriving a …
Designing Fixed-Base Operations Utilizing Systems Engineering Principles, Ross L. Stephenson Jr., David A. Carroll
Designing Fixed-Base Operations Utilizing Systems Engineering Principles, Ross L. Stephenson Jr., David A. Carroll
Journal of Aviation Technology and Engineering
There are currently over 3,200 fixed-base operations (FBOs) conducting business in the United States attempting to meet the demands of FAA Part 91, Part 135, and a limited number of Part 121 operations. With the US economy slowly climbing out of the trough during 2013, the utilization of fixed-base operations has become more attractive and economical to the corporate business and the affluent recreational traveler. Despite the increased flight activities utilizing the services of fixed-base operators, keen competition, rising fuel cost, and the economies of scale recognized by large FBO franchises significantly erode the profitability and sustainability of smaller FBOs. …
The Smart Airport App, Transit.Io: The Travel Optimizer, Jacqueline Andrews, Devin Burke, Uvika Chaturvedi, Jake Collins, Pranav Gupta, Vikrant Neb, Harsh Somani, Alyssa Williams
The Smart Airport App, Transit.Io: The Travel Optimizer, Jacqueline Andrews, Devin Burke, Uvika Chaturvedi, Jake Collins, Pranav Gupta, Vikrant Neb, Harsh Somani, Alyssa Williams
Purdue Journal of Service-Learning and International Engagement
Jacqueline Andrews, Devin Burke, Uvika Chaturvedi, Jake Collins, Pranav Gupta, Vikrant Neb, Harsh Somani, and Alyssa Williams were all seniors in industrial engineering in the spring semester of 2016. They were members of Team 3 in the course titled Human Factors and Work Analysis (IE 486). This course explores the application of engineering, computer sciences, information sciences, and psychological principles and methods to the analysis and design of human work systems. In this article, the students describe their development of an application prototype to improve the airport travel experience.
Fatigue Analysis Of The Welded Region In The Automotive Torsion Beam Rear Suspension System, Nan Zhan, Xiaochuan Zhang
Fatigue Analysis Of The Welded Region In The Automotive Torsion Beam Rear Suspension System, Nan Zhan, Xiaochuan Zhang
The 8th International Conference on Physical and Numerical Simulation of Materials Processing
No abstract provided.
Impact Of Microscope, Loupes, And Video Displays On Microsurgeons’ Risk For Musculoskeletal Injuries, Yiyu Shi, Denny Yu
Impact Of Microscope, Loupes, And Video Displays On Microsurgeons’ Risk For Musculoskeletal Injuries, Yiyu Shi, Denny Yu
The Summer Undergraduate Research Fellowship (SURF) Symposium
Microsurgery is commonly performed with operating microscopes or loupes to repair traumatic injuries, damage from cancer surgery, etc.; however, the prolonged, awkward, and constrained postures from using these equipment puts microsurgeons at risk for musculoskeletal pain and injuries. An alternative heads-up displays may improve surgeons’ ergonomics by allowing microsurgeons to perform the procedure in a more comfortable and ergonomic position. The study compares the effect of microscope, loupes and video displays on postures during microsurgical targeting task. This study incorporated three steps to contrast displays. Firstly, 12 participants wearing six reflective markers completed a surgery simulation using all three displays, …
Exploring Regional And Telecoupled Land Use Change Impacts From Environmental Shocks, Kevin Hill, Liz Wachs, Brady Hardiman, David Yu, Shweta Singh
Exploring Regional And Telecoupled Land Use Change Impacts From Environmental Shocks, Kevin Hill, Liz Wachs, Brady Hardiman, David Yu, Shweta Singh
The Summer Undergraduate Research Fellowship (SURF) Symposium
Natural disasters or environmental shocks have the potential to disrupt local agricultural systems as well as distant agricultural systems through cascading effects. In this work we selected two distinct environmental shocks and traced their cascading effects on land use change. Quantifying cascading effects is a salient issue because climate change forecasts indicate an increase in frequency and intensity of global environmental shocks. This study incorporated the concept of telecoupled systems involving interrelating ecological, economic and political/social components. A telecoupled framework involving cascading effects was implemented using three approaches. The first approach involved using bilateral agricultural trade matrix data to analyze …
How User's Visualization Literacy Relates To Their Cognitive Traits, Jiming Yang, Sukwon Lee, Ji Soo Yi
How User's Visualization Literacy Relates To Their Cognitive Traits, Jiming Yang, Sukwon Lee, Ji Soo Yi
The Summer Undergraduate Research Fellowship (SURF) Symposium
Researchers in the field of Information Visualization have suggested that users’ cognitive abilities would likely to affect their understanding of data visualizations and deeper exploration in the visualizations. However, the evidence is still scant to link between user’s visualization literacy and their cognitive traits. Thus, the research goal of this study is to explore how user’s visualization literacy and their cognitive traits are related. In particular, we focused on two cognitive traits: numeracy and need-for-cognition. In order to achieve the goal, first, we measured visualization literacy, numeracy, and need-for-cognition using existing instruments with 46 Amazon Mechanical Turk workers, and the …
Leveraging Smart Infusion Pump Data For Workflow, Patient Care And Usability Improvement In Human Factors, Yan Ni Ding, Denny Yu, Poching Delaurentis, Kang-Yu Hsu, Joon Hong Kim
Leveraging Smart Infusion Pump Data For Workflow, Patient Care And Usability Improvement In Human Factors, Yan Ni Ding, Denny Yu, Poching Delaurentis, Kang-Yu Hsu, Joon Hong Kim
The Summer Undergraduate Research Fellowship (SURF) Symposium
Infusion pumps are medical devices that deliver fluids like medication, and nutrients in a precise, timely, and controlled manner that is critical to patient care. It is widely used in clinical settings especially in hospitals, nursing homes and sometimes at home. Smart infusion pumps technology are supposed to be reduce nurses’ workload, but due to the recurring number of alarms which disrupt the workflow of the infusion process, most nurses prefer to use the traditional infusion pumps or work-around the safety features of the smart pumps. Thus, the aim of this research is to leverage Smart Infusion Pump data to …
Parametric Approaches To Fractional Programs: Analytical And Empirical Study, Chong Hyun Park
Parametric Approaches To Fractional Programs: Analytical And Empirical Study, Chong Hyun Park
Open Access Dissertations
Fractional programming is used to model problems where the objective function is a ratio of functions. A parametric modeling approach provides effective technique for obtaining optimal solutions of these fractional programming problems. Although many heuristic algorithms have been proposed and assessed relative to each other, there are limited theoretical studies on the number of steps to obtain the solution. In this dissertation, I focus on the linear fractional combinatorial optimization problem, a special case of fractional programming where all functions in the objective function and constraints are linear and all variables are binary that model certain combinatorial structures. Two parametric …
Best Matching Processes In Distributed Systems, Mohsen Moghaddam
Best Matching Processes In Distributed Systems, Mohsen Moghaddam
Open Access Dissertations
The growing complexity and dynamic behavior of modern manufacturing and service industries along with competitive and globalized markets have gradually transformed traditional centralized systems into distributed networks of e- (electronic) Systems. Emerging examples include e-Factories, virtual enterprises, smart farms, automated warehouses, and intelligent transportation systems. These (and similar) distributed systems, regardless of context and application, have a property in common: They all involve certain types of interactions (collaborative, competitive, or both) among their distributed individuals—from clusters of passive sensors and machines to complex networks of computers, intelligent robots, humans, and enterprises. Having this common property, such systems may encounter common …
Service-Level Based Response By Assignment And Order Processing For Warehouse Automation, Zijian He
Service-Level Based Response By Assignment And Order Processing For Warehouse Automation, Zijian He
Open Access Theses
Along with tremendous growth of online sales in this Internet era, unprecedented intensive competition in shortening the delivery time of orders has been occurring among several major online retailers. On the other hand, the idea of customer-oriented service creates a trend of diversified pricing strategy. Different price options are offered to cater to diversified needs of customers. It has become an urgent need for online sales industries to provide the differentiated service levels for different classes of customers with different priorities based on the charging prices and resource constraints of the supply network.
In response to the challenges mentioned above, …
Markov-Based Ranking Methods, Baback Vaziri
Markov-Based Ranking Methods, Baback Vaziri
Open Access Dissertations
Ranking methods are an essential tool to help make decisions. This dissertation document examines different aspects of the theory and application of pairwise comparison ranking methods, specifically those that use Markov chains. First, a new method is developed to solve a traditional recruiting problem, and is shown to improve the predictive power of its ranking. Next, modifications are made to an existing method that theoretically improves the reliability, while maintaining the rank integrity. Last, a framework is developed that defines a fair and comprehensive ranking method, and several popular methods are evaluated in their ability to adhere to the said …
The Casualty Transportation Of Ebola Outbreak In Liberia: A Simulation Study, Hyejin Cho
The Casualty Transportation Of Ebola Outbreak In Liberia: A Simulation Study, Hyejin Cho
Open Access Theses
In this paper, we have solved the unique problem of casualty transportation problem under Ebola by developing dynamic policies for vehicle routing in order to provide practical decision support. The objective of the proposed model is to minimize the total transmission risk. We describe the problem with real- constraints and parameters based on the empirical data of the 2014 Ebola outbreak in Liberia. The casualty transportation problem is a variant of Dynamic Pick-up and Delivery Problems (DPDP), in which a vehicle is dispatched to demand location in real time and it then transports the demands to the aimed area (destination). …
Developing Agent-Based Simulation Models Of Task Performance Of Cognitively Diverse Teams, Megan Marie Nyre
Developing Agent-Based Simulation Models Of Task Performance Of Cognitively Diverse Teams, Megan Marie Nyre
Open Access Theses
Team-oriented work dominates industry, government, and academic areas with the goal of solving increasingly complex problems. However, the scope and external validity of traditional human factors research is inherently limited by the time and resources required to conduct laboratory studies. The model described in this thesis integrates simulation with human factors by providing an operationalized model that incorporates cognitive diversity and domain expertise. Convergence and functionality of the model have been established through a series of analyses, and a clear path for future research has been identified. By integrating simulation methods into human factors subject areas, researchers may be able …
A Case Study Of Two-Echelon Multi-Depot Vehicle Routing Problem, Tianqi Yu
A Case Study Of Two-Echelon Multi-Depot Vehicle Routing Problem, Tianqi Yu
Open Access Theses
The Vehicle Routing Problem (VRP) is a classic combinatorial optimization problem and a topic still studied for practical applications. Current research focuses on single echelon distribution systems such as distribution centers serving customers. However, in typical distribution, goods flows among regional distribution centers, local warehouses and customers, defined as a two-echelon network. The two-echelon multiple depot VRP problem is documented and applied to two stages illustrated by a small scale computational example. In the first stage, the simulated annealing algorithm is employed to determine the routes between local warehouses and final customers. For the second stage, trial-and-error is applied to …
Health Monitoring Device, Prim Boonwisut, Askar Zhapbassov, Tahmeed Rafee
Health Monitoring Device, Prim Boonwisut, Askar Zhapbassov, Tahmeed Rafee
Engagement & Service-Learning Summit
No abstract provided.
Human-System Integration, Jiahui Cai, Xianpeng Wang, Xinyue Cao, Siyu Liu, Wanyu Wu, Xiao Shi, Yutong Xu
Human-System Integration, Jiahui Cai, Xianpeng Wang, Xinyue Cao, Siyu Liu, Wanyu Wu, Xiao Shi, Yutong Xu
Engagement & Service-Learning Summit
No abstract provided.
A Smart System: Driver Safety For The Car Savvy And Not Through Mobile Application, Veronica Cruz, Jonathan La Plain
A Smart System: Driver Safety For The Car Savvy And Not Through Mobile Application, Veronica Cruz, Jonathan La Plain
Engagement & Service-Learning Summit
No abstract provided.
Application Of Smart Factory Design In Nuclear Energy Industry With Focus On Safety, Olivia Crasta, Cem Yilmaz
Application Of Smart Factory Design In Nuclear Energy Industry With Focus On Safety, Olivia Crasta, Cem Yilmaz
Engagement & Service-Learning Summit
No abstract provided.
Automatic Food Expiration Notification System, Nikolas-Viktor P. Doukas, Ozan Celebi, Lindsey E. Colgrove, Michael D. Werner, Tre Commings, Christopher M. Zatek, Daniel E. Odihi
Automatic Food Expiration Notification System, Nikolas-Viktor P. Doukas, Ozan Celebi, Lindsey E. Colgrove, Michael D. Werner, Tre Commings, Christopher M. Zatek, Daniel E. Odihi
Engagement & Service-Learning Summit
No abstract provided.
"Smart" Airport App, Jacob A. Collins, Alyssa Williams, Vikrant Neb, Pranav Gupta
"Smart" Airport App, Jacob A. Collins, Alyssa Williams, Vikrant Neb, Pranav Gupta
Engagement & Service-Learning Summit
We are going to make an app that can be used by people traveling through or from ORD airport (Chicago), which will provide live time update for security check line (in terms of time), change of gate for the flight and whether or not the flight is on time. The reason for developing this application is to simplify and improve the passenger’s overall airport experience in order to make it more enjoyable, informative, and time efficient while decreasing the current negative mentality towards traveling. Resources needed to create the prototype would include softwares that help in creating wireframes of the …
Enhancing A Flight Dispatcher Display For Safer Flight Operations, Jeongjoon Boo
Enhancing A Flight Dispatcher Display For Safer Flight Operations, Jeongjoon Boo
Open Access Theses
This study assesses capability of flight dispatchers to adopt enhancements on their display that enables detection of flights in abnormal activities and investigation of the causes. Three approaches were used. First, the expected function for enhancements was designed by collecting information from different places about what technologies are available for consideration. Second, hierarchical task analysis was conducted based on data collected by interviewing a former flight dispatcher in order to assess operational capability to handle the enhancement. Third, based on the results of first two approaches, a display prototype that includes the enhancement was developed and evaluated for usability and …