Engineering Commons^™

Organics To You - Optimization Of Produce Bins, Rassaniya Lerdphayakkarat, Chuan Chieh Lu, Jon Roschke, Juliana Suzuki, Jessie Truong

Engineering and Technology Management Student Projects

Organics to You (www.organicstoyou.org ) is a produce delivery company that focuses on bringing organic local food from local farms straight to the homes, schools, and businesses of its clients. Each week a "Small Bin" is created using different varieties of local produce from various farms. Customers receive a bin that contains 12-14 varieties of produce with 2-6 "servings" of each variety (e.g., 1 melon, 4 apples, 1 head of lettuce, 2 lbs potatoes, etc).

Our objective is to optimize the contents of the “Small Bin”. The decision we want to make is how much of each variety do …

Reliability Analysis Of Active Earth Pressure For Cantilever Walls On Mudflows And Residual Soils Of The Aburrá Valley, Juan David Castro, Juan Camilo Viviescas, Juan Pablo Osorio

Conference papers

According to the variability of the local geology of the Aburrá Valley, two geological strata with similar grain size distribution were analyzed. The geologies are composed of mudflows and residual soils from the San Diego stock in the Poblado neighborhood. These soils show a similar mechanical behavior in relation to the number of blows of the standard penetration test SPT. The analysis was carried out by reliability methods for the determination of the active earth pressure for the geotechnical design of a cantilever walls. The analysis consists in the variation of the height of the retaining wall between 1 and …

Nano/Submicro-Structured Iron Cobalt Oxides Based Materials For Energy Storage Application, Hongyan Gao

Masters Theses & Specialist Projects

Supercapacitors, as promising energy storage devices, have been of interest for their long lifespan compared to secondary batteries, high capacitance and excellent reliability compared to conventional dielectric capacitors. Transition metal oxides can be applied as the electrode materials for pseudocapacitors and offer a much higher specific capacitance. Co3O4 is one of the most investigated transition metal oxides for supercapacitor. Besides simple monometallic oxides, bimetallic transition oxides have recently drawn growing attention in electrochemical energy storage. They present many unique properties such as achievable oxidation states, high electrical conductivities because of the coexistence of two different cations in a single crystal …

Fabrication Of Octahedral Tantalum Cluster Film By Electrophoretic Deposition, Ngan T.K Nguyen, Benjamin Dierre, Naoki Ohashi, Tetsuo Uchikoshi, Fabien Grasset, Adele Renaud, Stephane Cordier, Maxence Wilmet

Electrophoretic Deposition VI: Fundamentals and Applications

The octahedral Ta₆Br₁₄.8H₂O cluster, one of the [M₆Lⁱ₁₂L^a₆]^n- octahedrons (M= Nb, Ta; Lⁱ= halogen, L^a= halogen or chalcogen), exhibits interesting oxido-reduction properties in solution¹. The application of the [Ta₆Brⁱ₁₂]²⁺ cores has been potentially studied in biotechnologies², optical devices³, photovoltaic cells⁴ and catalysis⁵. Originating from the expectation to block the UV and NIR light on low-emissivity window, the Ta₆Br₁₄.8H₂O cluster thin …

Inspire E-News 10 2017, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences News

• State-of-the-art manufacturing lab to address shortage of engineers, skilled trades
• Komorowski wins first ever Betty J. Georgeau scholarship
• Welcome new faculty
• $2 million grant for migrant students focuses on STEM education
• WMU's new president takes the helm

Multiscale Modeling Of Cardiovascular Flows, Alison Marsden, Ethan Kung

Publications

Simulations of blood flow in the cardiovascular system offer investigative and predictive capabilities to augment current clinical tools. Using image-based modeling, the Navier-Stokes equations can be solved to obtain detailed 3-dimensional hemodynamics in patient-specific anatomical models. Relevant parameters such as wall shear stress and particle residence times can then be calculated from the 3D results and correlated with clinical data for treatment planning and device evaluation. Reduced-order models such as open or closed loop 0D lumped-parameter models can simulate the dynamic behavior of the circulatory system using an analogy to electrical circuits. When coupled to 3D simulations as boundary conditions, …

An Investigation Of Information Sought By Caregivers Of Alzheimer’S Patients On Online Peer-Support Groups, Emma Scharett, Kapil Chalil Madathil, Snehal Lopes, Hunter Rogers, Sruthy Agnisarman, Shraddhaa Narasimha, Aparna Ashok, Cheryl Dye

Publications

Alzheimer’s caregivers seek social support through online communities to deal with their issues. The research team conducted a content analysis of ALZConnected.org to investigate the characteristics of information searched by caregivers and responses received. Two-hundred fifty posts and related responses were randomly selected and analyzed using a classification tool derived from the analysis of 500 posts and related responses spanning a yearlong period. The Linguistic Inquiry and Word Count (LIW C) generated an average tone rating of 25.94 for the posts and 52.69 for the responses. The findings highlighted the caregiver’s need for emotional support (59.6%), and confusion about Alzheimer’s …

Quantitative Analysis Of Regenerative Energy In Electric Rail Traction Systems, Mahmoud Saleh, Oindrilla Dutta, Yusef Esa, Ahmed Mohamed

Publications and Research

This paper aims at determining the influential factors affecting regenerative braking energy in DC rail transit systems. This has been achieved by quantitatively evaluating the dependence of regenerative energy on various parameters, such as vehicle dynamics, train scheduling, ground inclination and efficiency of the electrical devices. The recuperated power and energy have been presented by a mathematical model, comprising of a set of empirical forms, which allows for thorough analysis. A detailed simulation model of a typical DC-traction system has been developed to validate the developed empirical forms. The results verified the validity of the proposed mathematical model, and demonstrated …

A Picture Is Worth A Thousand Roads, Keith Pierce

News Items

No abstract provided.

Computer-Aided Design, Gary Benenson

Open Educational Resources

No abstract provided.

Identification Of Reverse Engineering Candidates Utilizing Machine Learning And Aircraft Cannibalization Data, Marc Banghart

International Journal of Aviation, Aeronautics, and Aerospace

As military aircraft continue to remain in service and age, cannibalization of parts is increasing. Proactive identification of parts that are at high risk for cannibalization will inform engineering processes such as reverse engineering, thus allowing potentially reducing lead time to develop new parts. The research objective was to develop a causal structure that can be used for prediction of when cannibalization actions may occur. Bayesian networks allow encoding of causality between various descriptive features given a data set. The method utilized a tabu search algorithm, identified the underlying causal structure and the associated node probabilities. The method is then …

An Enhanced Operational Definition Of Dielectric Breakdown For Dc Voltage Step-Up Tests, Allen Andersen, Jr Dennison

Journal Articles

The imprecise definition of breakdown in the ASTM D3755-14 standard can misidentify breakdown. If the recommended test circuit current sensing element threshold is set too high, breakdown may occur undetected. Conversely, false positives may result from designating a low current threshold. An operational definition of breakdown much less sensitive to these pitfalls is outlined herein. This enhanced definition of breakdown is based on the average rate of change of the leakage current with increasing voltage, rather than a simple current threshold, avoiding ambiguous association with anomalies in current traces. For tests that continuously monitor leakage current, breakdown can be detected …

Reliability Analysis Of Geosynthetic Reinforced Soil Walls, Michael Powers

Graduate Theses & Non-Theses

Geosynthetic reinforced soil walls have been widely used for earth retention and stabilization in many geotechnical applications. In the traditional design of geosynthetic reinforced soil walls, Allowable Stress Design (ASD) is used to address the uncertainties. However, it cannot explicitly consider the uncertainties in a systematic way in the design process; especially geotechnical uncertainties are typically at high levels and problem-specific. Traditional methods usually result in over-conservativeness, inconsistence, and empiricism in the design practice. Recently there has been a trend of the application of reliability methods for design of geosynthetic reinforced soil walls to explicitly address uncertainties in the design …

Performance-Based Contracting For Rest Area Maintenance, Michael Powers

Graduate Theses & Non-Theses

To maintain rest area stops in the United States, three methods are used. They are the In-House method, Method-Based Contracting (MBC), and Performance-Based Contracting (PBC). In recent years, the PBC method has become increasingly popular because this method reduces the strain of managing In-House employees or MBC contracts, generates more business in the public sector, can increase the level of service (LOS), and generally reduces the costs of maintaining rest area stops up to 5%. In the United States, no less than 15 states use the PBC method to maintain their rest area stops, and the results from switching to …

Geophysical Investigation Of Dewatering In Lolo Creek, Southwest Missoula, Montana, Usa, Akpofure Orubu

Graduate Theses & Non-Theses

Electrical Resistivity Tomography (ERT), Spontaneous Potential (SP), Multichannel Analysis of Surface Waves (MASW) and Seismic Refraction Tomography methods have been used to provide valuable information on the seepage pathways leading to dewatering of Lolo Creek and the subsurface lithology of the area. Results from the MASW and seismic refraction tomography studies show a bedrock elevation of about 35 m close to Highway 93 and about 27 m at the end of the 288 m East-West seismic line running through Lewis and Clark Drive. ERT results show a shallow high resistive geolectric layer underlain by low resistive layers. The Eocene bedrock …

3d Printing Of 316l Stainless Steel And Its Effect On Microstructure And Mechanical Properties, Rawn Penn

Graduate Theses & Non-Theses

Laser powder bed fusion or 3D printing is a potential candidate for net shape forming and manufacturing complex shapes. Understanding of how various parameters affect build quality is necessary. Specimens were made from 316L stainless steel at 0°, 30°, 60°, and 90° angles measured from the build plate. Three tensile and four fatigue specimens at each angle were produced. Fracture morphology investigation was performed to determine the fracture mode of specimens at each build angle. Microstructural analysis was performed on one of each orientation. The average grain size of the samples was marginally influenced by the build angle orientation. Tensile …

Vibration Modification To A.P.I. Fracture Short Term Conductivity Testing Procedure, Blake A. Ereaux

Graduate Theses & Non-Theses

The current API Short Term Fracture Conductivity (volume number) testing procedure provided by the American Petroleum Institute doesn't consistently provide repeatable results. For example, in an independent review of three commercial lab results testing the same sample of proppant the variation between the three had a data spread of nearly 80% (Anderson, 2013). Continuing and refocusing the research performed by Kent Blair's thesis "Modifying Fracture Conductivity Testing Procedures" (Montana Tech, 2015), the goal of this thesis is to expand the lab research results on the use of vibration in the cell loading procedure to improve the repeatability of test results. …

The Effect Of Mineral Composition On Shale Oil Recovery, Andrew Fakhry

Graduate Theses & Non-Theses

Identifying contact angles in porous media is essential for characterizing multiphase flow of fluids in reservoirs. Traditional methods to measure contact angles assume a homogenous structure of reservoir rock; however, microscale pictures by Scanning Electron Microscopes (SEM) show that rock composition varies even inside a single pore. In addition, the preferentiality of oil layer formation is different according to the minerals constituting the reservoir rock. As a result, contact angles have heterogeneous behavior at the pore-scale.

For the purpose of this research, contact angles are measured on the pure minerals that make up the main components of a Bakken reservoir …

Evaluation Of Methods To Model Hydraulic Fractures In Flow Simulation, Ben Doleshal

Graduate Theses & Non-Theses

Modern reservoir studies use reservoir simulation to predict future production and plan reservoir development. Due to the increase in production in unconventional reservoirs in recent years, the number of hydraulically fractured wells has risen drastically. The days of using simple analytic techniques to account for the production of a single hydraulic fracture in a vertical well are gone, and the need to be able to model numerous hydraulic fractures in many stages over long horizontals is required.

This brings up the study question of this research: What is the best way to model hydraulic fractures in a flow simulator? There …

Geology Of The Middle Member Of The Bakken Formation In Divide County, North Dakota, Mandy Brewer

Graduate Theses & Non-Theses

The Upper Devonian-Lower Mississippian Bakken Formation of Williston Basin is a large unconventional oil and gas play consisting of a lower shale member, a middle member, and an upper shale member. The middle member is a production target because it contains porosity and petroleum expelled from the shale members around it. Variable production and sweet spots of the Bakken in the study area of Divide County, ND and 15 miles around Divide County in the USA prompted a closer look at middle member Bakken sediments. For this study, 606 wells were correlated and thin sections from two wells located 10.17 …

Inductance Testing According To The New Ieee Std 1812-Application And Possible Extensions For Ipm Machines, Vandana Rallabandi, Narges Taran, Dan M. Ionel, Ping Zhou

Power and Energy Institute of Kentucky Faculty Publications

Equivalent circuit parameters are very important for permanent magnet synchronous machines since they serve as the basis for performance estimation and implementation of power electronic drives controls. Specified in the newly approved IEEE Std 1812, a short-circuit test can be employed, in combination with an open-circuit measurement, in order to determine the back emf and the synchronous inductance. In this paper, it is shown that for interior permanent magnet (IPM) machines this approach can be used only to determine the d-axis inductance and additional and separate measurements are required for the q-axis inductance. In this respect, one method widely used …

Metodat Për Organizimin E Planeve Dinamike Të Punës, Driton Ibrahimi

Theses and Dissertations

Ndërtimtaria është veprimtari specifike ekonomike që ka për synim ngritjen dhe rikonstruktimin e objekteve ndërtimore. Si veprimtari, ajo realizon produktin e caktuar, objektin ndertimor-arkitektonik. Ndërtimtaria veqohet për shkak të aktiviteteve të shumta që nevojiten për arritjen e një rezultati brenda një afati kohor. Secili aktivitet si proces teknologjik ka kohëzgjatjen e tij. Varësisht nga natyra e projektit kemi: • Aktivitete që kryhen në vartësi nga aktivitetet tjera paraprake • Aktivitete të pavarura, që kryhen në të njejtën kohë me aktivitet tjera. Planifikimi dhe strukturimi i aktiviteteve punuese në varësi të kohës quhet plan dinamik i punës. Paraqitja e aktiviteteve dhe …

Organizimi I Ndërtimit Të Objektit “Shkolla E Mesme E Lartë”Në Graçnicë, Drinor Aruqaj

Theses and Dissertations

Menagjimi dhe shkenca e organizimit të punës kanë rëndësi të madhe për zhvillimin e një shoqërie bashko hore.

Kjo temë është ndarë në gjashtë pjesë: pjesa e pare është një hyrje në problematikën e menaxhimit të ndërtimit dhe koncepteve themelore të organizimit të ndërtimit në nivelin operativ. Pjesa e dytë ka të bëjë me punët përgaditore.Pjesa tretë proceset kryesore të punës

ku janë përfshirë tema mjaft të gjera ,si teknologjia e ndërtimi, mekanizmi dhe planifikimi. Pjesa e katërt ka të bëjë me menaxhimin e projekteve elementeve konstruktive.

Pjesa e pestë ka të bëjë me para masën e punëve ndërtimore, analizën …

Projekti Ideor "Rrugë Në Fshatin Makresh-Novobërdë", Ylli Osmani

Theses and Dissertations

Projektimi i rrugëve është proces i ndërlikuar profesionalo-kërkimor i cili vendoset me veprim interaktiv, dhe për qëllim ka gjetjen e zgjidhjes optimale. Ky punim ka për qëllim të paraqet hapat e projektit ideor të rrugës me të cilen edhe është bërë kjo temë diplome, dhe ka për qëllim paraqitjen e të dhënave, procedurat e projektimit, matjet në teren, pjesën tekstuale, pjesën grafike, paramasen dhe parallogarinë, raportin teknik dhe fazat e tjera që do të shqyrtohen në vazhdim. Vendi i rrugës së projektuar është Komuna e Novobërdës konkretisht fshati Makresh i Epërm-Novobëdë. Studimet e mëhershme lidhur me këto sfida paraqesin se …

Baza Ligjore Dhe Direktivat E Be Për Sigurinë Në Punë Në Sektorin E Ndërtimit, Aplikimi I Tyre Në Kosovë, Shkëmb Shabani

Theses and Dissertations

Siguria dhe shëndeti në ambientet e punës vazhdon të jetë një nga temat kryesore të kronikës, duke n’a sjellë në vëmendje rëndësinë e respektimit të normave të sigurisë dhe informimin profesional të punëmarrësve, për të shmangur me efikasitet incidentet e mundshme që mund t’i kanosen atyre gjatë ushtrimit të detyrës.

Siguria dhe Shëndeti në Punë është komponent i rëndësishëm i mbrojtjes sociale të punonjësve kundër aspekteve negative të punës, aksidenteve në punë dhe sëmundjeve profesionale, përmirëson kënaqësinë në punë dhe fuqizon funksionimin e tregut të punës dhe cilësinë e kapitalit njerëzor. Nga ana tjetër, standardet e dobëta të sigurisë dhe …

Projekti Ideor I Rrugës Lokale - "Lagjja E Re" Fsh. Makresh-Novobërdë, Burim Syla

Theses and Dissertations

Qëllimi i këtij punimi është të paraqiten etapat e hartimit të një Projekti Ideor i infrastrukturës rrugore. Qëllimi kryesor ështe paraqitja e të dhënave, hapave lidhur me procedurat e hartimit të projektit ideor, pjesa tekstuale, pjesa grafike paramasa dhe parallogaria, raporti teknik po ashtu dhe përshkrimi teknik për të gjitha fazat për hartimin e krijimit të projektit ideor në rastin tonë projekti i rrugës "Lagjja e Re'' Makresh i Epërm. Vendi i rrugës së projektuar është Komuna e Novobërdës konkretisht fshati Makresh i Epërm. Studimet e mëhershme lidhur me këto sfida paraqesin se si të tilla kanë ekzistuar në universitete …

A Software Based Smart Grid Framework For Automated Decision On Resource Allocation, Topological Control Using Omnet++, Eric Horton, Prakash Ranganathan

Electrical Engineering Faculty Publications

The futuristic smart grid require creative architectures for Information and Communication technologies (ICT) networks. One such architecture must need some sort of topological control for the next generation grid. To assess architectural impact and effectiveness, simulation models are important. Communication networks are expected to be tightly coupled-integrated element for smart grid systems. The co-existence of communication and control and their joint operation necessitate accurate modeling of communication events. While at the first glance, it is tempting to model the communication network as a black box that introduces delay/s between its input and output, the complex interactions among grid network and …

Non-Linear Heart Rate And Blood Pressure Interaction In Response To Lower-Body Negative Pressure, Ajay K. Verma, Da Xu, Amanmeet Garg, Anita T. Cote, Andrew P. Blaber, Kouhyar Tavakolian

Electrical Engineering Faculty Publications

Early detection of hemorrhage remains an open problem. In this regard, blood pressure has been an ineffective measure of blood loss due to numerous compensatory mechanisms sustaining arterial blood pressure homeostasis. Here, we investigate the feasibility of causality detection in the heart rate and blood pressure interaction, a closed-loop control system, for early detection of hemorrhage. The hemorrhage was simulated via graded lower-body negative pressure (LBNP) from 0 to -40 mmHg. The research hypothesis was that a significant elevation of causal control in the direction of blood pressure to heart rate (i.e., baroreflex response) is an early indicator of central …

Cross-Modal Recipe Retrieval With Rich Food Attributes, Jingjing Chen, Chong-Wah Ngo, Tat-Seng Chua

Research Collection School Of Computing and Information Systems

Food is rich of visible (e.g., colour, shape) and procedural (e.g., cutting, cooking) attributes. Proper leveraging of these attributes, particularly the interplay among ingredients, cutting and cooking methods, for health-related applications has not been previously explored. This paper investigates cross-modal retrieval of recipes, specifically to retrieve a text-based recipe given a food picture as query. As similar ingredient composition can end up with wildly different dishes depending on the cooking and cutting procedures, the difficulty of retrieval originates from fine-grained recognition of rich attributes from pictures. With a multi-task deep learning model, this paper provides insights on the feasibility of …

Generalized Debye Sources-Based Efie Solver On Subdivision Surfaces, Xin Fu, Jie Li, Li (Lijun) Jun Jiang, Balasubramaniam Shanker

Electrical and Computer Engineering Faculty Research & Creative Works

The electric field integral equation is a well-known workhorse for obtaining fields scattered by a perfect electric conducting object. As a result, the nuances and challenges of solving this equation have been examined for a while. Two recent papers motivate the effort presented in this paper. Unlike traditional work that uses equivalent currents defined on surfaces, recent research proposes a technique that results in well-conditioned systems by employing generalized Debye sources (GDS) as unknowns. In a complementary effort, some of us developed a method that exploits the same representation for both the geometry (subdivision surface representations) and functions defined on …