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Articles 31 - 60 of 3280

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

Nutrient Storage Cover, Nick Jamison, Cole Reighard, Andy Russ, Shweta Chopra, Jacek A. Koziel Apr 2019

Nutrient Storage Cover, Nick Jamison, Cole Reighard, Andy Russ, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Smithfield Hog Production has several processing facilities across the state of Iowa along with numerous contract finishing farms where producers grow their pigs. The hog manure on these sites is pumped into a slurry store for storage. A slurry store is a 1.2-million-gallon round tank that is 18-feet-tall and 120-foot diameter. Since the slurry store is open to the weather, it accumulates rain, snow, and other types of precipitation.

While evaporation generally equals precipitation, there are some years where precipitation is greater than evaporation. The result is a reduction in manure holding capacity and additional cost to hog production ...


An Aco-Inspired, Probabilistic, Greedy Approach To The Drone Traveling Salesman Problem, Jessica Houseknecht Apr 2019

An Aco-Inspired, Probabilistic, Greedy Approach To The Drone Traveling Salesman Problem, Jessica Houseknecht

Senior Honors Theses

In recent years, major companies have done research on using drones for parcel delivery. Research has shown that this can result in significant savings, which has led to the formulation of various truck and drone routing and scheduling optimization problems. This paper explains and analyzes a new approach to the Drone Traveling Salesman Problem (DTSP) based on ant colony optimization (ACO).

The ACO-based approach has an acceptance policy that maximizes the usage of the drone. The results reveal that the pheromone causes the algorithm to converge quickly to the best solution. The algorithm performs comparably to the MIP model, CP ...


Applications Of Optimization Modeling In Multi-Disciplinary Engineering Research, Anton F. Astner, Ekramul Haque Ehite, Yang Li, Colin Sasthav Apr 2019

Applications Of Optimization Modeling In Multi-Disciplinary Engineering Research, Anton F. Astner, Ekramul Haque Ehite, Yang Li, Colin Sasthav

Biosystems Engineering and Soil Science Publications and Other Works

Optimization modeling is the process of selection of the best solution to a design problem using predetermined constraints from a set of prospective solutions. Increased computing power has made optimization solvers readily available for business/research needs. For example, Microsoft Excel has a simple, but robust solver. Such solvers can model linear, nonlinear, and integer programming problems that are limited in size. This study shows the use of the optimization model solvers in various research contexts.


Conduction Maize Drying For Emerging African Communities, Todd Van Dyke, Brett Olson, Jacob Titmus, Michael Shippy, Shweta Chopra, Jacek A. Koziel Apr 2019

Conduction Maize Drying For Emerging African Communities, Todd Van Dyke, Brett Olson, Jacob Titmus, Michael Shippy, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Currently, in emerging African Communities, they are putting their maize out on mats to be dried under the sun. They are having problems with animals and humans stealing their produce along with maize weevils destroying their crops. Our objective is to create a mobile and efficient system that can dry grain on a need basis. It also needs to be made from materials that are easily obtained in these communities. The product will not be able to utilize electricity or gas to the main source of fuel will be fire. This is not the first time that this problem is ...


Cardinal Ig: Keying Process, Jacob Raveling, Benjamin Shaver, Mary Gail Knutson, Shweta Chopra, Jacek A. Koziel Apr 2019

Cardinal Ig: Keying Process, Jacob Raveling, Benjamin Shaver, Mary Gail Knutson, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

The current process for setting guide keys into aluminum extrusions is performed manually. It is a tedious and unergonomic process. The team needs to evaluate the process for improvement or replacement.

The keying process is done by hand. Each key has to be placed in a channel one by one. Then keys are secured into the channels by using a wooden block which is smashed against the keys. This process is taking too much time, and it is hard on the employee’s hands. When attempting to secure the keys in the channels, a hole begins to wear into their ...


Process Improvement For Material Breakdown, Kirshanthi Ganesa Moorthy, Michael Patten, Matthew Klug, Steven Brousseau, Shweta Chopra, Jacek A. Koziel Apr 2019

Process Improvement For Material Breakdown, Kirshanthi Ganesa Moorthy, Michael Patten, Matthew Klug, Steven Brousseau, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

  • Cardinal Glass Industries is a management-owned S-Corporation. They develop residential glass for windows and doors. Cardinal Glass has around 6000 employees in 37 locations across the United States and two research centers located in Wisconsin and Minnesota. Their goal is to design and fabricate the most advanced residential glass products in the industry.
  • The problem that they are facing right now is maximizing the efficiency of cutting down foam blocks and sponge material. The foam blocks are used during the key-in process while the sponge material is used for wiping excess glue off the glass.


Cost Analysis Of Swine Manure Separation, Lucas Meyer, Mason Moeller, Todd Muell, Shweta Chopra, Jacek A. Koziel Apr 2019

Cost Analysis Of Swine Manure Separation, Lucas Meyer, Mason Moeller, Todd Muell, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Smithfield Foods Inc. was founded in 1936 by Joseph W. Luter and his son Joseph W. Luter, Jr., with the name Smithfield Packing Company. The company name was later changed to Smithfield Foods in 1974. Smithfield Foods Inc. is quite proud of their guiding principles (Responsibility, Operational Excellence & Innovation) and this small excerpt defines their company as a whole, “We will seek fresh ideas in all aspects of business, including ways to work smarter, serve customers better, and make Smithfield a better company.” (Smithfield Foods, 2019).

The issue that we worked on was how swine producers want to decrease the inefficiency of hauling raw manure slurry and increase manure application systems by separating solids and liquids produced in a typical shallow pit barn with an external manure storage system. There is a moderate amount of research that has been done on swine manure separation, but quite a bit of it is outdated. The current application of raw manure slurry is altogether expensive and inefficient by the traditional method of transporting the manure by large tanks, while post-separated manure could be transported further distances more efficiently. The increasing manure application possibilities and transporting regulations have been a large part of the project in the context of the future of swine production.

Given the elements of the project:

  • Minimal research has been completed on current swine manure separation methods
  • Manure separation is expensive, and its feasibility is all dependent on a producer's budget and the overall size of their operation
  • Multiple costs associated with implementing a separation method (Solid & liquid storage, separation equipment, additional labor, etc.)

It is critical for producers/growers to comprehend the true benefits of implementing a separation method at this time before future regulations become required. The cost analysis tool will give producers the capability to view several costs associated with a particular separation method. When adopting a separation method, there two important benefits; higher efficiency of transporting manure farther distance and the cost-effectiveness increase tremendously.


Hagie Warehouse Consolidation, Nick Mignery, Keagan Hedrick, Christopher Sjoblom, Vincent Breedlove, Shweta Chopra, Jacek A. Koziel Apr 2019

Hagie Warehouse Consolidation, Nick Mignery, Keagan Hedrick, Christopher Sjoblom, Vincent Breedlove, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

  • Hagie Manufacturing is a small manufacturer of agricultural sprayers that recently partnered with John Deere. They have a manufacturing and storage facility in central Iowa.
  • Hagie Manufacturing is having difficulty using their current organization system of parts and how to pick them to meet their increased goal of building more (33%) sprayers a day.
  • This is creating a problem for the company because parts are in multiple locations which makes it difficult to quickly get parts to where they are needed in a correct rotating habit efficiently.
  • This project will immediately affect the workers of warehouse one and five on ...


Danfoss Journal Bearing Removal, Chad Martin, Lucas Kramer, Matt Johnson, Ben Gibson, Shweta Chopra, Jacek A. Koziel Apr 2019

Danfoss Journal Bearing Removal, Chad Martin, Lucas Kramer, Matt Johnson, Ben Gibson, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Danfoss Power Solutions is a global leader in the mobile hydraulic power market. As a key supplier to some of the world’s most recognized names in construction and agricultural machinery, Danfoss’s market share includes remanufactured hydraulic pumps and motors. Parts and Service is responsible for producing these remanufactured units and continues to encounter and overcome challenges unique to remanufacturing. One such problem is the removal of journal bearings from the pump and motor castings.

Journal bearings are thin, press-fit bushings that provide a bearing surface for shafts in low load locations. Most bearings are installed in blind holes ...


Grain Cart Compaction Impact, Kyle Lafrenz, Harrison Kruse, Tyler Ehlers, Shweta Chopra, Jacek A. Koziel Apr 2019

Grain Cart Compaction Impact, Kyle Lafrenz, Harrison Kruse, Tyler Ehlers, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

  • Many factors influence the yield. Harvest is a busy time, and often there is not clear direction or guidance on where to drive or not drive the Grain Cart or other heavy equipment. Path of travel is something that could be changed by educating operators and growers on the benefits and tools they can use.
  • Traffic in the field has inconsistent patterns across the field to minimize time to and from the combine. It is not clear where to place the “path” to the loading area. The heavy axle loads when full can and do contribute to compaction. It is ...


Improving Agricultural Practices Through Water-Flow Modeling And Visualization, Warren Jennings, Riley Nylin, Josh Pederson, James Pollock, Shweta Chopra, Jacek A. Koziel Apr 2019

Improving Agricultural Practices Through Water-Flow Modeling And Visualization, Warren Jennings, Riley Nylin, Josh Pederson, James Pollock, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Current farming tools do not provide an easy solution for water-flow modeling or visualization; therefore, farmers are not aware of what happens in their fields following rainfall events.

Our client, Cedar Valley Innovation (CVI), is a small company owned and operated by Bob Recker out of Waterloo, IA. CVI has supported several projects related to water flow, erosion, and alternative planting in the past including "Row Crop Headland Management Economic Opportunity: Applicator Pathway” and "Alternative Sources of Accurate Agricultural Topography." Mr. Recker’s main focus is on improving the farmer’s triple bottom line of a sustainable income, feeding the ...


Donaldson Single-Piece Flow, Ryan Hood, Miles Martin, Michael Shultz, Shweta Chopra, Jacek A. Koziel Apr 2019

Donaldson Single-Piece Flow, Ryan Hood, Miles Martin, Michael Shultz, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

The client for this project is Donaldson Company. They have nearly 12,000 employees worldwide specializing in the production of filters and filter readers that are used in many industries. This project took place at Donaldson’s Waterloo, Iowa facility.

The Capstone team has been tasked to update their oldest and least changed Mechanical Air production line from a batch process to a single-piece flow. The current line utilizes too much overtime to meet demand, and Donaldson would like us to solve that without the addition of more operators. Donaldson wants to consolidate space to make room for new product ...


Automated Finishing Pig Feeder Adjustment, Ryan Godfredsen, Kelley Mabeus, Michael Meyer, Brett C. Ramirez, Shweta Chopra, Jacek A. Koziel Apr 2019

Automated Finishing Pig Feeder Adjustment, Ryan Godfredsen, Kelley Mabeus, Michael Meyer, Brett C. Ramirez, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Feed costs in the swine industry are typically 60-70% of the total swine production costs. Feeder adjustment is used to decrease feed costs. When feeders are properly adjusted, the growth rate can be improved while the wasted feed is minimized. Currently, feeders are manually monitored and adjusted by daily caretaker inspection, which is very laborious. Automated adjustment would reduce labor need and allow for the integration of precision management in the future.


Grain Drying Test Stand, Luke Fischer, Travis Hursh, Riley Schnell, Jet Wayne, Shweta Chopra, Jacek A. Koziel Apr 2019

Grain Drying Test Stand, Luke Fischer, Travis Hursh, Riley Schnell, Jet Wayne, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

  • Dr. Dirk Maier is a post-harvest engineering professor at Iowa State University and wants to expand the grain processing program
  • A continuous-flow grain dryer for labs and research is needed.
  • The dryer is to be designed, built, and configured all from scratch by the capstone team, implementing the designs and specifications Dr. Maier requires.
  • Our dryer will be finished by the next technology capstone team and be used by classes to come.
  • This project’s broader scope and initial capstone stages were developed from two previous capstone projects, referenced below.


Makusafe Corporation Device Testing, Nicholas Campbell, Alexander Foust, Dawson Knapp, Andrew Yi, Shweta Chopra, Jacek A. Koziel Apr 2019

Makusafe Corporation Device Testing, Nicholas Campbell, Alexander Foust, Dawson Knapp, Andrew Yi, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

MakuSafe is a startup company based out of West Des Moines, Iowa with a focus on worker safety. They have developed a wearable safety monitoring device that aims to improve workplace safety by monitoring the environmental conditions, as well as slips, trips, falls, near misses, and other potential hazards around the worker. A safety manager can then review this data and take proactive steps to improve the work environment. The device is mounted in a holster that is worn on the arm of an individual. MakuSafe needs data collected on the force required to break the holster away from a ...


Vertical Lathe Tooling Optimization, Garrett Deschaine, Nicholas Gambs, Brendan Maye, Graham Fiebiger, Theodore Payne, Shweta Chopra, Jacek A. Koziel Apr 2019

Vertical Lathe Tooling Optimization, Garrett Deschaine, Nicholas Gambs, Brendan Maye, Graham Fiebiger, Theodore Payne, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

In order to run Sandvik Coromant Capto C8 tooling, the operator must remove the existing stick tool holder from the vertical lathes ram. This process takes multiple hours and has the potential to damage the ram. Our sponsor would like to avoid removing the stick tool holder when running C8 and cam lock style tooling.


Pella Lean Utilization Cell Improvement, Kritika Chopra, Layne Mcmahon, Trevor Sorensen, Payton Stadtlander, Shweta Chopra, Jacek A. Koziel Apr 2019

Pella Lean Utilization Cell Improvement, Kritika Chopra, Layne Mcmahon, Trevor Sorensen, Payton Stadtlander, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Observe a wood utilization that is not meeting the efficiency and output goals they are looking for and give feedback on different ways to improve uptime and efficiency. The cell is comprised of a cell that includes two moulders, an electronic press, a gluer, and a robot. This cell is used to combine boards that are made of scrap material from another line with full-length edge boards to create an array of larger boards that are used on various products that Pella.

The utilization cell in question is the newest Utilization Cell (U-Cell) at the Pella, Iowa facility and has ...


Economic Model For Investing Small Versus Large Ag Equipment, Jonathan Alas, Chris Davis, Grant Pieper, Shweta Chopra, Jacek A. Koziel Apr 2019

Economic Model For Investing Small Versus Large Ag Equipment, Jonathan Alas, Chris Davis, Grant Pieper, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

  • This project will allow the client to give economic advice to its customers while making equipment purchase decisions.
  • The client has customers who invest in equipment who want to maximize their efficiency and return on investment.
  • This problem is not one that many operators consider, but it is something that could benefit many producers if they consider our deliverable. Solving this problem could save producers money and increase equipment field capacity allowing operators to get more done in less time. This solution can create a business opportunity for dealerships to work with their customers to find the right size equipment ...


Hagie Ideal Welding Cell, Paul Appleget, Katie Larson, Jon Thomas, Matt Rowan, Shweta Chopra, Jacek A. Koziel Apr 2019

Hagie Ideal Welding Cell, Paul Appleget, Katie Larson, Jon Thomas, Matt Rowan, Shweta Chopra, Jacek A. Koziel

TSM 416 Technology Capstone Projects

Hagie Manufacturing is a company based in Clarion, Iowa, where they build sprayers for agricultural applications. There are around 140 employees currently working at Hagie, and they are ranked in 2nd among their other top 10 competitors. Hagie has an impact in Iowa by being known as a locally established company, created by a friendly farmer that wanted to have personal and family-oriented business to support his neighboring farmers. Welding production requires an increase to 2 machines per day in order to stay up with demand. Hagie has full capability to keep up with John Deere’s standards, which have ...


Design By Taking Perspectives: How Engineers Explore Problems, Jaclyn K. Murray, Jaryn A. Studer, Shanna R. Daly, Seda Mckilligan, Colleen M. Seifert Apr 2019

Design By Taking Perspectives: How Engineers Explore Problems, Jaclyn K. Murray, Jaryn A. Studer, Shanna R. Daly, Seda Mckilligan, Colleen M. Seifert

Industrial Design Publications

Background: Problem exploration includes identifying, framing, and defining design problems and bounding problem spaces. Intentional and unintentional changes in problem understanding naturally occur as designers explore design problems to create solutions. Through problem exploration, new perspectives on the problem can emerge along with new and diverse ideas for solutions. By considering multiple problem perspectives varying in scope and focus, designers position themselves to increase their understandings of the “real” problem and engage in more diverse idea generation processes leading to an increasing variety of potential solutions.

Purpose/Hypothesis: The purpose of this study was to investigate systematic patterns in problem ...


The Good Family, James Hannigan Apr 2019

The Good Family, James Hannigan

Honors College

The Good Family is a story following a group of seventeens in their historic and scrutinized ’68 Birth-Night Battalia. The characters, who have trained since as early as age twelve and as late as fourteen – with heavy combat training for up to a year and as little as six months, are well prepared by the Tokien system. Demonstrating their Link-worthy will be a challenge that none of them can fully imagine, as this year is the unveiling of a Tokien-engineered tech development that will undoubtedly change the course humanity rides in the closing of the 22nd century.


Impacts Of Freight Consolidation And Truck Sharing On Freight Mobility, Tieming Liu, Chaoyue Zhao Apr 2019

Impacts Of Freight Consolidation And Truck Sharing On Freight Mobility, Tieming Liu, Chaoyue Zhao

Publications

The trucking industry is an important sector of the U.S. economy. However, it is quite fragmented, hindering the efficiency of cargo transportation and the ability for small carriers to identify demands to fill full truck loads. The focus of this research is to study models and algorithms in order to aid online freight marketplaces to identify efficient consolidation strategies. To accomplish this aim, a new mixed integer programming model for the pickup and delivery problem has been developed. The model is geared towards identifying effective freight consolidation opportunities. A branch-and-cut algorithm to solve the model was also developed. The ...


Route Planning For A Fleet Of Electric Vehicles With Waiting Times At Charging Stations, Baoxiang Li, Shashi Shekhar Jha, Hoong Chuin Lau Apr 2019

Route Planning For A Fleet Of Electric Vehicles With Waiting Times At Charging Stations, Baoxiang Li, Shashi Shekhar Jha, Hoong Chuin Lau

Research Collection School Of Information Systems

Electric Vehicles (EVs) are the next wave of technology in the transportation industry. EVs are increasingly becoming common for personal transport and pushing the boundaries to become the mainstream mode of transportation. Use of such EVs in logistic fleets for delivering customer goods is not far from becoming reality. However, managing such fleet of EVs bring new challenges in terms of battery capacities and charging infrastructure for efficient route planning. Researchers have addressed such issues considering different aspects of the EVs such as linear battery charging/discharging rate, fixed travel times, etc. In this paper, we address the issue of ...


Impacts Of Freight Consolidation And Truck Sharing On Freight Mobility, Tieming Liu, Chaoyue Zhao Apr 2019

Impacts Of Freight Consolidation And Truck Sharing On Freight Mobility, Tieming Liu, Chaoyue Zhao

Data

Corresponding data set for Tran-SET Project No. 17ITSOKS02. Abstract of the final report is stated below for reference:

"The trucking industry is an important sector of the U.S. economy. However, it is quite fragmented, hindering the efficiency of cargo transportation and the ability for small carriers to identify demands to fill full truck loads. The focus of this research is to study models and algorithms in order to aid online freight marketplaces to identify efficient consolidation strategies. To accomplish this aim, a new mixed integer programming model for the pickup and delivery problem has been developed. The model is ...


A Tunable Triboelectric Wideband Energy Harvester, Daniel S. Nelson, Alwathiqbellah Ibrahim, Shahrzad Towfighian Apr 2019

A Tunable Triboelectric Wideband Energy Harvester, Daniel S. Nelson, Alwathiqbellah Ibrahim, Shahrzad Towfighian

Systems Science and Industrial Engineering Faculty Scholarship

The ability to efficiently convert mechanical energy into electrical energy has become an important topic of discussion and research in the last decade. Triboelectric generators have recently been popular for vibration energy harvesting, but despite plenty of research on its material aspect, research on combining mechanical characteristics and voltage generation output has been sparse. Many energy harvesters suffer from low operating bandwidths and are usually restricted to operating at a specific frequency. We propose a tunable triboelectric energy harvester that has a large response over a wide frequency bandwidth at low frequencies. The tunability is implemented by axially pre-loading a ...


On Accounting For Equipment-Control Interactions In Economic Model Predictive Control Via Process State Constraints, Helen Durand Feb 2019

On Accounting For Equipment-Control Interactions In Economic Model Predictive Control Via Process State Constraints, Helen Durand

Chemical Engineering and Materials Science Faculty Research Publications

Traditionally, chemical processes have been operated at steady-state; however, recent work on economic model predictive control (EMPC) has indicated that some processes may be operated in a more economically-optimal fashion under a time-varying operating policy. It is unclear how time-varying operating policies may impact process equipment, which must be investigated for safety and profit reasons. It has traditionally been considered that constraints on process states can be added to EMPC design to prevent the controller from computing control actions which create problematic operating conditions for process equipment. However, no rigorous investigation has yet been performed to analyze whether, when a ...


Evaluation Of An Intelligent Team Tutoring System For A Collaborative Two-Person Problem: Surveillance, Alec Ostrander, Desmond Bonner, Jamiahus Walton, Anna Slavina, Kaitlyn M. Ouverson, Adam Kohl, Stephen Gilbert, Michael Dorneich, Anne Sinatra, Eliot H. Winer Jan 2019

Evaluation Of An Intelligent Team Tutoring System For A Collaborative Two-Person Problem: Surveillance, Alec Ostrander, Desmond Bonner, Jamiahus Walton, Anna Slavina, Kaitlyn M. Ouverson, Adam Kohl, Stephen Gilbert, Michael Dorneich, Anne Sinatra, Eliot H. Winer

Industrial and Manufacturing Systems Engineering Publications

This paper describes the development and evaluation of an Intelligent Team Tutoring System (ITTS) for pairs of learners working collaboratively to monitor an area. In the Surveillance Team Tutor (STT), learners performed a surveillance task in a virtual environment, communicating to track hostile moving soldiers. This collaborative problem solving task required significant communication to achieve the common goal of perfect surveillance. In a pilot evaluation, 16 two-person teams performed the task within one of three feedback conditions (Individual, Team, or None) across four trials each. The STT used a unique approach to filtering feedback so that teams in both individual ...


Task-Based Control And Design Of A Bldc Actuator For Robotics, Avik De, Abriana Stewart-Height, Daniel E. Koditschek Jan 2019

Task-Based Control And Design Of A Bldc Actuator For Robotics, Avik De, Abriana Stewart-Height, Daniel E. Koditschek

Departmental Papers (ESE)

This paper proposes a new multi-input brushless DC motor current control policy aimed at robotics applications. The controller achieves empirical improvements in steady-state torque and power-production abilities relative to conventional controllers, while retaining similarly good torque-tracking and stability characteristics. Simulations show that non-conventional motor design optimizations whose feasibility is established by scaling model extrapolations from existing motor catalogues can vastly amplify the effectiveness of this new control-strategy.


Effects Of Light Illumination On Ocular Responses And Visual Comfort, Shun-Nan Yang, Manho Jang, Jim Sheedy, Yeokyung Seo Jan 2019

Effects Of Light Illumination On Ocular Responses And Visual Comfort, Shun-Nan Yang, Manho Jang, Jim Sheedy, Yeokyung Seo

VPI Research

Background: Artificial light sources such as Light-emitting Diode (LED) emit more intensive blue light (460 to 490 nm) and are with a wavelength distribution deviating from the peak wavelength of 550 nm in natural sun light. The present study examined how cold and warm LED lamps with high- and low-blue light emission differently affected objective ocular responses and subjective viewing symptoms. Methods: 34 adults with normal or correct-to-normal vision read printed continuous text with one of three lamps (LED 4000 K, LED 6500 K and OLED 4000 K) generating 50 and 110 Nits for 60 mins respectively while their pupil ...


The Core Of Social Network Modeling: Industrial Engineering., Shannon C. Roberts, Chaitra Gopalappa, Nazanin Nazanin Jan 2019

The Core Of Social Network Modeling: Industrial Engineering., Shannon C. Roberts, Chaitra Gopalappa, Nazanin Nazanin

Science and Engineering Saturday Seminars

Networks are abound in our everyday lives, from disaster response networks to cellular networks to social networks. In this workshop, we will introduce the different types of networks and how Industrial Engineering is used to model these networks. Next, we will describe current social network modeling research done at UMass. Finally, we will delve into hands-on activities that include social network analysis, such as the clustering of people into groups, and modeling of the spread of ideas in a social network, such as how tweets spread on Twitter.