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Articles 1 - 30 of 3486

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

Technical Report: Control And Design Of An Open-Source Two-Degree-Of-Freedom Hopping Robot, Weiyi Tang, Sonia F. Roberts, Daniel E. Koditschek Sep 2020

Technical Report: Control And Design Of An Open-Source Two-Degree-Of-Freedom Hopping Robot, Weiyi Tang, Sonia F. Roberts, Daniel E. Koditschek

Departmental Papers (ESE)

Using mechanical design inspired by the Ghost Minitaur and the open-source motor controller hardware from the Stanford Doggo, we built an open-source two-degree-of-freedom hopping robot. The robot hops using a Raibert-inspired reactive controller on the leg length and velocity. This technical report documents the project and provides a guide to others interested in building similar research robots.


An Obstacle Disturbance Selection Framework: Emergent Robot Steady States Under Repeated Collisions, Feifei Qian, Daniel E. Koditschek Jul 2020

An Obstacle Disturbance Selection Framework: Emergent Robot Steady States Under Repeated Collisions, Feifei Qian, Daniel E. Koditschek

Departmental Papers (ESE)

Natural environments are often filled with obstacles and disturbances. Traditional navigation and planning approaches normally depend on finding a traversable “free space” for robots to avoid unexpected contact or collision. We hypothesize that with a better understanding of the robot–obstacle interactions, these collisions and disturbances can be exploited as opportunities to improve robot locomotion in complex environments. In this article, we propose a novel obstacle disturbance selection (ODS) framework with the aim of allowing robots to actively select disturbances to achieve environment-aided locomotion. Using an empirically characterized relationship between leg–obstacle contact position and robot trajectory deviation, we simplify ...


Gender Differences And Cockpit Design, Susan Archer, Heidi Brewer, Stacie Fain, Stephanie Smith Jul 2020

Gender Differences And Cockpit Design, Susan Archer, Heidi Brewer, Stacie Fain, Stephanie Smith

Student Works

The design project reported in this paper examined female pilots’ experiences with how well or poorly cockpit design allowed them to safely accomplish their flying missions. The general aviation aircraft cockpit is not designed for female pilots, often causing them to find ways to adapt to the cockpit in order to operate the aircraft safely. Two primary focal areas for adaptations address issues with accessibility of controls and “viewability” inside and outside the cockpit. The design team used a Situation Awareness-Oriented Interface Design (SAOD) approach in preparing cockpit design recommendations for general aviation aircraft that would accommodate female pilots.


Feasibility Of Electric Field Assisted Clogging Reduction In Cold Gas Spraying Nozzle, Hendric Tronsson Jun 2020

Feasibility Of Electric Field Assisted Clogging Reduction In Cold Gas Spraying Nozzle, Hendric Tronsson

ENGS 88 Honors Thesis (AB Students)

The relatively novel cold spraying process expands its range of applications constantly. In order to continue this trend, this process still has various hurdles that need to be overcome such as clogging. Clogging within the cold gas spraying process causes porous coatings with less material properties and lower durability; a solution is needed in order to reduce the clogging and so expand the cold gas spraying applications. This study aimed to explore the feasibility of using an electric field to reduce clogging. To do so a simplified channel was used to simulate charged particle trajectory shifts under the influence of ...


Multistage Stochastic Programming Modeling For Farmland Irrigation Management Under Uncertainty, Qi Li, Guiping Hu Jun 2020

Multistage Stochastic Programming Modeling For Farmland Irrigation Management Under Uncertainty, Qi Li, Guiping Hu

Industrial and Manufacturing Systems Engineering Publications

Farmland management and irrigation scheduling are vital to a productive agricultural economy. A multistage stochastic programming model is proposed to maximize farmers’ annual profit under uncertainty. The uncertainties considered include crop prices, irrigation water availability, and precipitation. During the first stage, pre-season decisions including seed type and plant density are made, while determinations of when to irrigate and how much water to be used for each irrigation are made in the later stages. The presented case study, based on a farm in Nebraska, U.S.A., showed that a 10% profit increase could be achieved by taking the corn price ...


Goods Consumed During Transit In Split Delivery Vehicle Routing Problems: Modeling And Solution, Wenzhe Yang, Di Wang, Wei Pang, Ah-Hwee Tan, You Zhou Jun 2020

Goods Consumed During Transit In Split Delivery Vehicle Routing Problems: Modeling And Solution, Wenzhe Yang, Di Wang, Wei Pang, Ah-Hwee Tan, You Zhou

Research Collection School Of Information Systems

This article presents the modeling and solution of an extended type of split delivery vehicle routing problem (SDVRP). In SDVRP, the demands of customers need to be met by efficiently routing a given number of capacitated vehicles, wherein each customer may be served multiple times by more than one vehicle. Furthermore, in many real-world scenarios, consumption of vehicles en route is the same as the goods being delivered to customers, such as food, water and fuel in rescue or replenishment missions in harsh environments. Moreover, the consumption may also be in virtual forms, such as time spent in constrained tasks ...


Flexibly Serving A Finite Number Of Heterogeneous Jobs In A Tandem System, Yun Fong Lim, Bingnan Lu, Rowan Wang, Wenjia Zhang Jun 2020

Flexibly Serving A Finite Number Of Heterogeneous Jobs In A Tandem System, Yun Fong Lim, Bingnan Lu, Rowan Wang, Wenjia Zhang

Research Collection Lee Kong Chian School Of Business

Many manufacturing and service systems require a finite number of heterogeneous jobs to be processed by two stations in tandem. Each station serves at most one job at a time and there is a finite buffer between the two stations. We consider two flexible servers that are cross-trained to work at both stations. The duration for a server to finish a job at a station is exponentially distributed with a rate that depends on the server, the station, and the job. Our goal is to identify an efficient policy to dynamically assign the servers to the stations such that the ...


Developing Open Source Software Using Version Control Systems: An Introduction To The Git Language For Documenting Your Computational Research, Jared D. Smith, Jonathan D. Herman Jun 2020

Developing Open Source Software Using Version Control Systems: An Introduction To The Git Language For Documenting Your Computational Research, Jared D. Smith, Jonathan D. Herman

All ECSTATIC Materials

Version control systems track the history of code as it is committed (saved) by any number of developers. Have you made a coding error and cannot debug it? Version control systems allow for resetting code back to when it worked, and show what code has changed since previous commits.

The contents of this lecture provide an introduction to the git version control language, GitHub for cloud hosting open source code repositories, and tutorials that demonstrate common and useful git and GitHub practices. This lecture is intended to be coupled with a discussion on creating reproducible computational research.

The zipped folder ...


Reactive Semantic Planning In Unexplored Semantic Environments Using Deep Perceptual Feedback, Vasileios Vasilopoulos, Georgios Pavlakos, Sean L. Bowman, J. Diego Caporale, Kostas Daniilidis, George J. Pappas, Daniel E. Koditschek Jun 2020

Reactive Semantic Planning In Unexplored Semantic Environments Using Deep Perceptual Feedback, Vasileios Vasilopoulos, Georgios Pavlakos, Sean L. Bowman, J. Diego Caporale, Kostas Daniilidis, George J. Pappas, Daniel E. Koditschek

Departmental Papers (ESE)

This paper presents a reactive planning system that enriches the topological representation of an environment with a tightly integrated semantic representation, achieved by incorporating and exploiting advances in deep perceptual learning and probabilistic semantic reasoning. Our architecture combines object detection with semantic SLAM, affording robust, reactive logical as well as geometric planning in unexplored environments. Moreover, by incorporating a human mesh estimation algorithm, our system is capable of reacting and responding in real time to semantically labeled human motions and gestures. New formal results allow tracking of suitably non-adversarial moving targets, while maintaining the same collision avoidance guarantees. We suggest ...


A Retrial Queueing Model With Thresholds And Phase Type Retrial Times, Srinivas R. Chakravarthy May 2020

A Retrial Queueing Model With Thresholds And Phase Type Retrial Times, Srinivas R. Chakravarthy

Industrial & Manufacturing Engineering Publications

There is an extensive literature on retrial queueing models. While a majority of the literature on retrial queueing models focuses on the retrial times to be exponentially distributed (so as to keep the state space to be of a reasonable size), a few papers deal with nonexponential retrial times but with some additional restrictions such as constant retrial rate, only the customer at the head of the retrial queue will attempt to capture a free server, 2-state phase type distribution, and finite retrial orbit. Generally, the retrial queueing models are analyzed as level-dependent queues and hence one has to use ...


The Interaction Between Physical And Psychosocial Stressors, Esraa S. Abdelall, Zoe Eagle, Tor Finseth, Ahmad A. Mumani, Zhonglun Wang, Michael C. Dorneich, Richard T. Stone May 2020

The Interaction Between Physical And Psychosocial Stressors, Esraa S. Abdelall, Zoe Eagle, Tor Finseth, Ahmad A. Mumani, Zhonglun Wang, Michael C. Dorneich, Richard T. Stone

Industrial and Manufacturing Systems Engineering Publications

Do physical and psychosocial stressors interact to increase stress in ways not explainable by the stressors alone? A preliminary study compared participants’ stress response while subjected to a physical stressor (reduced or full physical load) and a predetermined social stressor (confronted by calm or aggressive behavior). Salivary cortisol samples measured endocrine stress. Heart rate variability (HRV) and electrodermal activity (EDA) measured autonomic stress. Perceived stress was measured via discomfort and stress state surveys. Participants with a heavier load reported increased distress and discomfort. Encountering an aggressive individual increased endocrine stress, distress levels, and perceived discomfort. Higher autonomic stress and discomfort ...


Dataset For Analysis Of Very High Surface Area 3d Printed Media In A Moving Bed Biofilm Sequencing Batch Reactor For Wastewater Treatment, Gabriel Proano-Pena, Andres L. Carrano, David M. Blersch May 2020

Dataset For Analysis Of Very High Surface Area 3d Printed Media In A Moving Bed Biofilm Sequencing Batch Reactor For Wastewater Treatment, Gabriel Proano-Pena, Andres L. Carrano, David M. Blersch

Faculty Datasets

This dataset includes 15 subfolders named Table6 trough Table20. Each folder is associated with a supplemental table. Each subfolder includes three files: .csv, .pdf/A, and .txt. The Table6 folder contains the raw data derived from experimentation. The remaining folders relate to data processing represented by figures or remarked as significant in the related manuscript: "Analysis of very high surface area 3D printed media in a Moving Bed Biofilm Sequencing Batch Reactor for Wastewater Treatment".


Exploring The Relationship Between Sustainable Projects And Institutional Isomorphisms: A Project Typology, Rakan Alyamani, Suzanna Long, Mohammad Nurunnabi May 2020

Exploring The Relationship Between Sustainable Projects And Institutional Isomorphisms: A Project Typology, Rakan Alyamani, Suzanna Long, Mohammad Nurunnabi

Engineering Management and Systems Engineering Faculty Research & Creative Works

With the increase in awareness about the wide range of issues and adverse effects associated with the use of conventional energy sources came an increase in project management research related to sustainability and sustainable development. Part of that research is devoted to the development of sustainable project typologies that classify projects based on a variety of external factors that can significantly impact these projects. This research focuses on developing a sustainable project typology that classifies sustainable projects based on the external institutional influences. The typology explores the influence of the coercive, normative, and mimetic institutional isomorphisms on the expected level ...


Use Of Automated Guided Vehicles (Agv) For Material Handling Applications, Brett Burbank, Jacob Askam, Matt Thompson, Zach Woloszyk, Michael Anderson, Jacek A. Koziel Apr 2020

Use Of Automated Guided Vehicles (Agv) For Material Handling Applications, Brett Burbank, Jacob Askam, Matt Thompson, Zach Woloszyk, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Conduct AGV (man-less forklift) research to understand the benefit versus the cost of implementing this technology with the intent to implement into warehouse

• The AGVs will travel from the stretch wrapper to the warehouse racking or truck staging area


Souvenirs For The Abe Department, Joe Miller, Lucas Ferrian, Ray Stark, Michael Anderson, Jacek A. Koziel Apr 2020

Souvenirs For The Abe Department, Joe Miller, Lucas Ferrian, Ray Stark, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• The ABE department frequently hosts both international and domestic visitors. The challenge was to design ABE-specific brand souvenirs to give the visitors. The souvenirs should impress the visitors and be clear, attractive, useful, and memorable. These souvenirs are to include the skills of all members involved. The main stakeholders will need to help to determine the final designs for each of the souvenirs.


Service Motor Case Planter Row Unit Show Stand, Andrew Anstoetter, Brandon Zumbach, Jason Vaske, Tristan Louvan, Michael Anderson, Jacek A. Koziel Apr 2020

Service Motor Case Planter Row Unit Show Stand, Andrew Anstoetter, Brandon Zumbach, Jason Vaske, Tristan Louvan, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Service Motor wants a way to show off the new Case IH 2000 series row unit within the dealership

• They want customers to be able to operate row unit with the Pro 700 monitor while on the show stand


Prototype Of And Isu Farm Disinfection System For Use In Emergency Disease Outbreak, Matt Devine, Noelle Hinrichs, Taeh Horbas, Michael Anderson, Jacek A. Koziel Apr 2020

Prototype Of And Isu Farm Disinfection System For Use In Emergency Disease Outbreak, Matt Devine, Noelle Hinrichs, Taeh Horbas, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

As the nation’s largest pork-producing state, Iowa has the upmost priority to protect its swine population from ailments, including biosecurity hazards such as swine disease. This is an essential issue for swine farmers across the state and worldwide need to have the ability to be prepared for. This project provides a design and list of materials for a system that removes organic material and disinfects both large machinery and small items efficiently, with a budget under $1500.

This design also utilizes a materials that can be accessed within a half hour drive of even the most remote Iowan farms ...


Paint Booth Automation System, Samuel Gray, Eric Millers, Tylor Kosary, Michael Anderson, Jacek A. Koziel Apr 2020

Paint Booth Automation System, Samuel Gray, Eric Millers, Tylor Kosary, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• The paint booth at the BioCentury Research Farm uses a manual exhaust system that relies on the operator to use their own judgement when determining fan usage for drying cycles and VOC removal.


Modeling Construction Site Erosion Using Geowepp, Mattea Contreras, Michael Anderson, Jacek A. Koziel Apr 2020

Modeling Construction Site Erosion Using Geowepp, Mattea Contreras, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

- EH&S is upgrading soil erosion models from RUSLE2 to GeoWEPP. There was a need for verification as to whether the results would vary between the two softwares. GeoWEPP is a new updated software and RUSLE2 has been used for the past decade. With ISU being responsible for so many construction sites an accurate model of soil erosion is essential.


Hydroswing Door Automation, Tyler J. Carney, Adam Degaetano, Nick Niemeyer, Creed Tucker, Michael Anderson, Jacek A. Koziel Apr 2020

Hydroswing Door Automation, Tyler J. Carney, Adam Degaetano, Nick Niemeyer, Creed Tucker, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

The client is an entity of Iowa State University located on the ISU BioCentury Research Farm.

Currently, the door is operated manually, and more efficient methods to operate the door exist such as using an automated system.


Feed Batch Mixer Box For Beef Cattle Farm, Brennon Ryan, Luke Sinclair, Luke Sweeney, Mark Thompson, Michael Anderson, Jacek A. Koziel Apr 2020

Feed Batch Mixer Box For Beef Cattle Farm, Brennon Ryan, Luke Sinclair, Luke Sweeney, Mark Thompson, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Our client, requires increasing efficiency and decreasing time spent feeding cattle daily.

• Currently, there is daily loss of productivity and revenue.

• This project will better allocate workers and get more done every day.


External Nutrient Storage Cover Design, Hunter Kvistad, Owen Oeltjenbruns, Brent Raver, Michael Anderson, Jacek A. Koziel Apr 2020

External Nutrient Storage Cover Design, Hunter Kvistad, Owen Oeltjenbruns, Brent Raver, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Most outdoor manure storage structures currently have no cover to keep rainwater out

• Rainwater in the storage structures increases the cost to pump manure out of the tanks

• Rainwater also dilutes the nutrient content of the manure


Electric Motor Dynamometer Manufacturability, Kyle Plach, Michael Schulte, Christian Van Sloun, Dylan Wood, Michael Anderson, Jacek A. Koziel Apr 2020

Electric Motor Dynamometer Manufacturability, Kyle Plach, Michael Schulte, Christian Van Sloun, Dylan Wood, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Develop a manufacture-ready electric motor dynamometer based on a prototype system.

• System will be replicated and utilized in ABE/TSM 363 Lecture/Lab demonstrations and testing.


Dust Sampling In Simulated Cage-Free Egg Production Environment, Benjamin Baumgard, Grant Honken, Michael Anderson, Jacek A. Koziel Apr 2020

Dust Sampling In Simulated Cage-Free Egg Production Environment, Benjamin Baumgard, Grant Honken, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• New developments in cage-free egg production has brought dust management practices into question. The problem at hand is how to make repeatable dust samples to determine best management practices.


Dry Forage Transportation Solution, Levi Eden, Jase Jordan, Kyle Post, Keaton Stoll, Michael Anderson, Jacek A. Koziel Apr 2020

Dry Forage Transportation Solution, Levi Eden, Jase Jordan, Kyle Post, Keaton Stoll, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• The ISU Beef Nutrition Farm has no way to transport multiple large round hay bales from the field to the storage area on the farmyard in one trip

• This results in many trips from the yard to the field picking up one bale at a time


Developing Objective Tests And Repair Guidelines For Hog Facility Trusses, Brady Lundquist, John Schnack, Michael Anderson, Jacek A. Koziel Apr 2020

Developing Objective Tests And Repair Guidelines For Hog Facility Trusses, Brady Lundquist, John Schnack, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Predicting naturally ventilated hog barns life expectancy

• Increase useful life of facilities and provide options to growers

• Barn collapses and safety of personnel, livestock, facilities, and other assets

• Provide cost breakdown of complete replacement vs. truss repair options


Design And Manufacture Of A Prototype For A Spiral Magnetic Array Filter, Jacob Miles, Alexander Stockmaster, Clayton Waldschmidt, Brian L. Steward, Michael Anderson, Jacek A. Koziel Apr 2020

Design And Manufacture Of A Prototype For A Spiral Magnetic Array Filter, Jacob Miles, Alexander Stockmaster, Clayton Waldschmidt, Brian L. Steward, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

• Fleenor Manufacturing has a patent-pending spiral filter that uses a patented magnetic array to remove magnetic particles from hydraulic fluid

• Fleenor needs experimental data to prove the effectiveness of the filter in controlled conditions


Deezee Plant Layout And Floor Marking Reconstruction, Andres Navarro, Ben Irwin, Scott Burnell, Joe Medina, Michael Anderson, Jacek A. Koziel Apr 2020

Deezee Plant Layout And Floor Marking Reconstruction, Andres Navarro, Ben Irwin, Scott Burnell, Joe Medina, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

● DeeZee’s GM running board assembly cells needed order and standardization.

● To update using 6S standards and standard work instructions

● Apply visual management and organizational practices.


Ames Laboratory Glovebox Cleaning, James Burke, Jack Hendricks, Caden Woollen, Michael Anderson, Jacek A. Koziel Apr 2020

Ames Laboratory Glovebox Cleaning, James Burke, Jack Hendricks, Caden Woollen, Michael Anderson, Jacek A. Koziel

TSM 416 Technology Capstone Posters

The removal of pyrophoric materials from inert atmosphere chambers presents the potential for injury or damage to property upon reacting to oxygen or water. In order to minimize the risk of an incident occurring, equipment and/or procedural recommendations need to be developed to create a standard way of disposing of these materials.


A System Dynamics Model Of Supply-Side Issues Influencing Beef Consumption In Nigeria, Kelechukwu G. Odoemena, Jeffrey P. Walters, Holger Maximilian Kleemann Apr 2020

A System Dynamics Model Of Supply-Side Issues Influencing Beef Consumption In Nigeria, Kelechukwu G. Odoemena, Jeffrey P. Walters, Holger Maximilian Kleemann

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

The per capita consumption of beef in Nigeria is reducing amidst a rising population that is dependent on beef as a major source of animal protein. In this paper, a system dynamics (SD) model was developed with the aim of testing exploratory policies aimed at reversing this trend. The simulations of various policy tests showed that, of all the policies tested, having a higher carcass yield seems to be the most efficient solution, but its feasibility faces some steep biological and ecological challenges. However, a combination of policies that cuts across the land–cattle–market nexus is necessary to obtain ...