Engineering Commons^™

Rc Baja 2023 Drivetrain And Chassis, Nathan Norby

All Undergraduate Projects

Students’ objective this quarter was to design a remote-controlled vehicle that utilizes a 4-link rear suspension, an I-beam front suspension, the ability to withstand a substantial front impact and several gearing options. The team also used several agreed upon design requirements to quantify the results of the objective.

To meet these objectives students followed a strict engineering method. Students split into a team’s divided the work into two sections. Max was responsible for the suspension and steering and Nathan was responsible for the chassis and drivetrain. Methods included engineering analysis which used mechanics of materials, static analysis, dynamic analysis, and …

Balsa Wood Bridge, Daniel R. Netro

All Undergraduate Projects

When building a bridge, there is a lot of criteria that need to be met so it can be functional. These criteria for this balsa bridge competition are what the bridge is made out of and can only weigh so much, the bridge must hold a certain amount of weight and not fail due to it, must allow a “vehicle” to go through the bridge and under it. For this bridge, the only material that can be used is balsa wood and any glue. With this, the strength of the material can be found and multiple calculations can be used …

Jcati Carbon Fiber Recycler: Oven Heating System, Kezyah Mantanona

All Undergraduate Projects

Central Washington University Mechanical Engineering Technology students are working with the Joint Center for Aerospace Technology Innovation (JCATI) to create a device that recycles carbon fiber wing trimmings produced by the wing manufacturing process for the Boeing 777 airplanes. The solution to this problem was to utilize crushing, shredding, and pyrolysis to remove the resin from the composite material and provide carbon fiber that can be repurposed. This project focuses on both the Oven Enclosure which will house the Oven Heating System as well as the heating elements and control circuit that are responsible for allowing the material to reach …

Advanced Microstructural Characterization Of Functionally Graded Dental Ceramic Material For Materials-Informed Finishing, Angani Vigneswaran

Theses and Dissertations--Manufacturing Systems Engineering

Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) has gained popularity as the choice of material for dental prosthetics. Ivoclar Vivadent’s IPS e.max ZirCAD Prime dental ceramic incorporates a unique gradient technology that varies the yttria content over the thickness of the material. The top layer is composed of 5Y-TZP which is desired for its optical properties while the bottom layer is composed of a much stronger 3Y-TZP. In between the two layers, 5Y-TZP and 3Y-TZP are mixed to form a transition layer. Varying the amount of yttria allows for more esthetically pleasing translucency in the visible areas of the restoration without compromising …

Radio-Controlled Baja Car, Jaxx Brown

All Undergraduate Projects

The Central Washington University RC Baja competition tests students’ skills in engineering in a matter of ability to design, construct and test an RC car. The objective of this senior project is to manufacture efficient suspension and steering systems for an RC vehicle and compete at the end of the school year against other students’ vehicles. Two races will be conducted during the competition, the RC vehicle will compete in a slalom-and-sprint and a Baja. Using more than one manufacturing method and material was expected of students to create the steering and suspension systems. Through CAD software and 3D printers …

Rc Baja Project: Suspension And Steering, Chance Hills

All Undergraduate Projects

Students designed and manufactured an RC Baja car to compete in the ASME RC Baja competition. The goal of this section of the project was to create a steering system and suspension system that work together properly with a partner’s chassis/drive train systems during tests and competitions. The car needed to be able to complete in the three events, which are a drag race, a solemn course, and the Baja event. The RC will also be evaluated on the ability to climb inclines, top speed, and withstand the drop test. This proposal will explain all the details and effort that …

Balsa Wood Bridge, Minh Le

All Undergraduate Projects

This senior paper outlined the design and construction of an articulating balsa wood bridge. Meeting specific criteria to hold 20kg of weight hanging from the center of the bridge. Also allowing a 32 mm wide by 25 mm high object to traverse the road deck of the bridge. The construction criteria required the use of only balsa wood and glue for the structural support, with exceptions for articulation components. The total weight of the bridge must not exceed 85 grams.

To achieve these goals, the bridge was designed using static equilibrium and material strength equations to span a 470mm body …

Generation Z And Their Use Of Learning Management System In Programming Courses, Ole Schultz, Tomasz Blaszczyk

Practice Papers

Generation Z students have grown up with ICT (information and communication technology) and are therefore used to being online more or less simultaneously on different types of media. Universities have different kinds of Learning Management Systems (LMS) with different possibilities for engagement. In the Electrical Engineering B. Eng. program at the Technical University of Denmark (DTU) we use a system called Learn. It has features for setting up individual study plans as well as common plans. Features such as surveys, quizzes, peer reviews are built in. We are interested in the students' use of the LMS, their engagement and the …

Virtual Industry Visits, Cian Farrell

Articles

Cian Farrell of Technological University Dublin describes a virtual educational approach trialled during the Covid-19 pandemic to engage students during a period of remote learning and educate them on industry processes and practices. Virtual industry visits saw students receive online briefings and tours of manufacturing plants and construction sites from industry representatives to complement their taught modules. The virtual visits have continued since Covid restrictions eased as part of a hybrid approach to learning that increases student exposure to real-life projects. The initiative won the Institution of Structural Engineers Excellence in Structural Engineering Education Award in 2022.

(3-Aminopropyl) Triethoxysilane-Based Immobilization Of Pt/Wo3 On A Microfiber Sensor For High Sensitivity Hydrogen Sensing, Qiao Gao, Bin Liu, Juan Liu, Shengpeng Wan, Tao Wu, Xing-Dao He, Ping Lu, Jinhui Yuan, Renli Ma, Zabih Ghassemlooy, Gerald Farrell, Qiang Wu

Articles

A novel high stability hydrogen sensor based on a Pt/WO3 coated single-mode tapered-no-core single-mode (STNCS) fiber interferometer is proposed and experimentally studied. The STNCS structure is treated by (3-Aminopropyl) triethoxysilane (APTES) and then coated with Pt/WO3 nanorods. Compared to the traditional method of using poly (dimethylsiloxane) (PDMS) to adhere Pt/WO3 nanorods on the fiber surface, the APTES modified fiber forms strong covalent bonds with Pt/WO3 with stronger adhesion to the fiber surface, resulting in improved long-term stability. Experimental results show that the sensitivity of the sensor varies from -31.05 nm/% to -4.30 nm/% as the hydrogen concentration increases from 0 …

Deactivation Effects Of Tb3+ On Ho3+ Emission In Fluoroindate Glasses For 3.9 Μm Laser Applications, Zhi Zhang, Zhuowei Cheng, Ruicong Wang, Shunbin Wang, Gerald Farrell, Shijie Jia, Pengfei Wang

Articles

A series of Ho3+/Tb3+ co-doped fluoroindate glasses with good thermal stability have been synthesized to study the deactivation effects of Tb3+ on the Ho3+: 3.9 μm emission. Efficient 3.9 μm emission enhancement is obtained under excitation by an 888 nm laser diode (LD). The Judd-Ofelt (J-O) intensity parameters and radiative properties are calculated to evaluate the spectroscopic properties. Possible energy transfer processes resulting in emission reinforcement are discussed. A higher spontaneous transition probability and larger peak emission cross section are achieved with the inclusion of Tb3+. This analysis supports the conclusion that Ho3+/Tb3+ co-doped fluoroindate glass is a potentially useful …

High-Sensitivity Vector Bend Sensor Based On A Fiber Directional Coupler Inscribed By A Femtosecond Laser, Ke Tian, Mingyuan Zhang, Chuanzhein Zhao, Huibin Li, Shilong Li, Yuxuan Jiang, Gerald Farrell, Pengfei Wang

Articles

In this Letter, we demonstrate a high-sensitivity vector bend sensor based on a fiber directional coupler. The fiber directional coupler is composed of two parallel waveguides inscribed within a no-core fiber (NCF) by a femtosecond laser. Since the two written waveguides have closely matched refractive indices and geometries, the transmission spectrum of the fiber directional coupler possesses periodic resonant dips. Such a fiber directional coupler exhibits a good bending-dependent spectral shift response due to its asymmetric structure. Experimental results show that bending sensitivities of -97.11 nm/m-1 and 58.22 nm/m-1 are achieved for the 0° and 180° orientations in the curvature …

Efficient 2075-Nm Laser Emission From Ho3+-Doped Fluorotellurite Glass In A Compact All-Fiber Structure, Liyuan Wang, Xiaotong Zhao, Nian Lv, Niannian Xu, Zhenrui Li, Gerald Farrell, Shunbin Wang, Pengfei Wang

Articles

In this Letter, we report an Ho3+-doped fluorotellurite glass all-fiber laser at 2075 nm. The gain fiber is pumped in-band with a 1976-nm fiber laser and connected by fusion splicing. A high-quality fusion splicing point with a loss of < 0.1 dB was obtained by finely adjusting the splicing power and offset. In addition, by optimizing the writing parameters, a third-order fiber Bragg grating (FBG) with a reflectivity of 98% was achieved at 2075 nm using the femtosecond laser direct-writing method. Using the FBG as the laser cavity mirror and a relatively short 28-cm-long home-made Ho3+-doped fluorotellurite fiber as the laser medium, a laser with a maximum unsaturated output power of 7.33 W was obtained, and the corresponding slope efficiency was as high as 93.4%. The first, to the best of our knowledge, demonstration of the fluorotellurite glass all-fiber ∼2.1-µm laser presented in this work may pave the way for a high-power 2.1-µm fiber laser with a compact structure.

Development Of A Hospital Discharge Planning System Augmented With A Neural Clinical Decision Support Engine, David Mulqueen

Dissertations

The process of discharging patients from a tertiary care hospital, is one of the key activities to ensure the efficient and effective operation of a hospital. However, the decision to discharge a patient from a hospital is complex, as it requires multiple interactions with nurses, family, consultants, health information records and doctors, which can be very time consuming and prone to error. This thesis descries how a neural network based Clinical Decision Support system can be developed, to help in the decision making process and dramatically reduce the time and effort in running the discharge process in a hospital. A …

Gamelan Gong Directivity Dataset, Samuel D. Bellows, Dallin T. Harwood, Kent L. Gee, Micah R. Shepherd

Directivity

No abstract provided.

Forecasting Covid-19 Cases Using Dynamic Time Warping And Incremental Machine Learning Methods, Luis Miralles-Pechuán, Ankit Kumar, Andres L. Suarez-Cetrulo

Articles

The investment of time and resources for developing better strategies is key to dealing with future pandemics. In this work, we recreated the situation of COVID-19 across the year 2020, when the pandemic started spreading worldwide. We conducted experiments to predict the coronavirus cases for the 50 countries with the most cases during 2020. We compared the performance of state-of-the-art machine learning algorithms, such as long-short-term memory networks, against that of online incremental machine learning algorithms. To find the best strategy, we performed experiments to test three different approaches. In the first approach (single-country), we trained each model using data …

The Impact Of Precipitation As An Adverse Weather Condition On Transportation Construction In South Dakota, Akosua Ofosua Okyere-Addo

Civil and Environmental Engineering Graduate Students Plan B Capstone Projects

This research assessed the impact of precipitation as an adverse weather condition on the transportation construction in South Dakota. A statistical survey of the data from the National Oceanic and Atmospheric Administration was conducted on 554 original stations, which was reduced to 433 stations of them were in South Dakota, then reduced to 170 stations with 30-year data coverage higher than 70 %. Eventually, the data were reduced further for pilot study purposes to a final 10 stations used for analysis in this study. The objective of this study is to examine potential precipitation thresholds towards determination of related adverse …

Expression Optimization Of The Gst-Gfp Fusion Protein Through The Alteration Of Induction Conditions, Matthew J. Vaccaro

Honors Undergraduate Theses

This research sought to determine which induction condition resulted in the greatest GST-GFP fusion protein expression. It will hopefully serve as a guide for future researchers trying to produce their own recombinant protein containing GST and GFP-tags. The CDNB Enzyme Assay was used to determine the quantity of GST-GFP fusion protein present and tested three variables: IPTG concentration, duration, and temperature of induction. The findings showed that IPTG concentration, temperature, and induction duration all had a significant impact on protein expression. Induction temperatures of 20 °C and 25 °C showed better protein expression at IPTG concentrations of 1.0 mM IPTG …

Decoding The Language Of Chemistry: Exploring Reactions In Scientific Literature, Grant Webb, August Moses, Christina Tang, Bridget T. Mcinnes

Summer REU Program

Natural Language Processing (NLP) offers promising potential for advancing chemistry research by exploring understudied topics, accelerating the research process, and reducing the costs of lab experimentation (1). For example, the U.S. military seeks to utilize NLP to replace toxic and limited resources, like Teflon, with more accessible alternatives. Our objective is to assess the accuracy of two models, Skip-Gram and BERT, after training them on chemistry data. Our work with Skip-Gram aims to replicate and enhance prior research results, while our work with BERT aims to highlight its Sub-Word method for analysis.

Extracting Plga Synthesis Parameters From Scientific Literature, Bridget T. Mcinnes, Byron Hedden, Nastassja Lewinksi

Summer REU Program

Systematic Reviews are necessary to create an exhaustive summary of current evidence relevant to a specific research question. It is estimated that it takes six individuals over 1000 hours to complete a review. In this work, we evaluate automatically extracting synthesis parameters for Poly(lactic-co-glycolic acid) (PLGA) polymers

Survey Data: Optimising Retrofitted Insulation For Irish Residential Building Walls, Rakshit D. Muddu, Aimee Byrne, Anthony Robinson Dr.

Datasets

A survey was conducted to determine the preferred set point temperature and heating pattern among Irish households. The survey was sent to 237 people living across Ireland, out of which 32 respondents skipped the survey and 9 surveys were found to be incomplete. Amongst the counties in Ireland 71.1% respondents were from Dublin, 6.34% from Kildare, 5% from Meath, 5% from Wicklow and in all the remaining counties response rate was below 2%. Part 1: This section of the survey recorded information regarding characteristics of the building such as house type, wall type, insulation type, period the house was built. …

Artificial Intelligence In Dentistry : Knowledge And Perceptions Of Moroccan Students, Manal Elhijazi, Ihsane Benyahya

Health Sciences

Introduction: Artificial intelligence (AI) is a revolution in education, research and health. The aim of this study is to assess the views and perceptions of dental students regarding artificial intelligence and its impact on their future professional practice. Methods: A voluntary anonymous e-questionnaire was sent to all 4th and 5th year dental students of the Faculty of Dentistry after receiving a course on artificial intelligence. The questionnaire consisted of sections to assess students' knowledge of artificial intelligence and its possible applications in dentistry as well as ethical considerations. Statistical analysis of the data was carried out using SPSS version 23 …

Prepubertal Periodontitis In Children: For An Adequate Diagnosis And Optimal Care, F.Z. El Mouatarif, S. Chemlali, M. Hamza, J. Kissa, S. El Arabi

Health Sciences

Prepubertal periodontitis (PP) is a rare and rapid progressive condition found a young cohort of patients that results in destruction of the periodontal support of the primary dentition. Its generalized form, prepubertal periodontitis is often associated with a significant gingival tissue inflammation and fast bone loss with attachment loss leading to the tooth loss. The localized form of PP is characterized by a much more discreet inflammation and slow evolution. It can be associated with a known underlying systemic disease or may occur as part of a recognized syndrome or as an isolated finding. Different treatment modalities can be used …

Biological Parameters And The Histological Response In Rectal Cancer Treated By Neoadjuvant Chemoradiotherapy: A Moroccan Cohort, A. Naim, N. Bouanani, F. Safini, S. Mounaime, Soumaya Rafii, L. Lachker, F. Guessous, M. Khaliss, N. Tawfiq, A. Badou

Health Sciences

Introduction: Multimodal management of rectal cancer, combining neoadjuvant Radio chemotherapy followed by total Mesorectal therapy (TME), has been shown to improve locoregional control. However, the histological response is variable independently of the initial tumor stage. Some recent data suggest the usefulness of the lymphocyte-monocyte ratio (LMR), neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) in predicting the histological response to neoadjuvant therapy. This study aimed to investigate the correlation between the complete histological response (pCR) after neoadjuvant radio chemotherapy and biological parameters (LMR, NLR and PLR) in rectal cancer patients.

PATIENTS AND METHODS: This retrospective study was conducted in three Moroccan …

Evaluating The Adhesion Response Of Acrylonitrile-Butadiene-Styrene (Abs)/Thermoplastic Polyurethane (Tpu) Fused Interface Using Multiscale Simulation And Experiments, Jonathan T. Villada, Gideon A. Lyngdoh, Rakesh Paswan, Bolaji Oladipo, Sumanta Das

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

This paper implements reactive forcefield molecular dynamics (MD) simulation to evaluate the mechan- ical performance of the fusion bond line formed between acrylonitrile butadiene styrene (ABS), and ther- moplastic polyurethane (TPU). The simulated interfacial adhesion responses, as obtained from MD simulation, are further implemented as the interfacial properties between ABS and TPU in an upscaled cohesive zone-based finite element analysis (FEA) model for macroscopic response evaluation. Such upscaling enables fair comparison of the simulated macroscopic stress–strain response with experimen- tal results obtained for 3D printed ABS/TPU hybrid samples with a fusion-bonded interface. Overall, the stress–strain response predicted from a FEA-based …

How Can Visual Programing Be Used To Aid The Development Of A Structural Scheme Design Process Utilising Geometric Data Within An Architectural Revit Model?, Ed Carthy, Kieran Lakhera O'Shea

Reports

The early-stage structural scheme design of a building is a complex task requiring the collection of multiple information categories such as geometry, loading and materials. The collection and review of this information is traditionally conducted in a 2D environment. This is inefficient, time-consuming, and tedious. This paper provides a review of how structural engineers’ understanding and implementation of BIM has evolved significantly in recent years, validated by extant literature in areas such as BIM automation, visual programming, and structural optimisation in the structural engineering sector. Structural engineers are growing more aware that BIM provides a vast repository of data to …

Internal Structure And Breakage Behavior Of Biogenic Carbonate Sand Grains, Elieh Mohtashami, C. Guney Olgun, Chenglin Wu, Tara Selly

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Study Investigates the Mechanical Behavior of Biogenic Carbonate Sands from Puerto Rico at Grain-Scale Level. Micro-Computed Tomography Has Also Been Used to Get Insights on the Internal Structure of These Particles Before and after Loading. the Crushing Strength of These Particles Are Smaller Comparing to the Values Reported for Silica Sands. It Has Also Been Shown that These Particles Have Complex Internal Structure Including a Network of Pores Connected with Channels. This Study Also Demonstrates the Effect of Intragrain Structure of Biogenic Carbonate Sands and Shows How Internal Grain Structure Plays a Role on Particle Fracture.

A Deep Learning-Informed Design Scheme For Shear Friction At Concrete-To-Concrete Interface: Recommendations For Inclusion In Aashto Lrfd Guidelines, Tarutal Ghosh Mondal, Nikkolas Edgmond, Lesley Sneed, Genda Chen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Recent advancements in construction technology have led to high-strength concrete and steel. However, these developments have depreciated the accuracy of the design equations in current provisions, which were based on normal-grade materials. To fill such a research gap, this study presents a novel deep learning-based computation scheme that can replace the current design provisions by virtue of its superior accuracy and reliability. The proposed approach exploits Neural Additive Models (NAMs) in which geometric and material properties associated with a normal weight concrete-to-concrete shear interface are inputted to individual neural network blocks. The outputs of the individual blocks are linearly combined …

Plural Communities: A Cultural Mapping Project + A Framework Plan For Cherokee Village, Arkansas, Community Design Center

Community Design Center Project Reports

What do urban designers do with culture? How might we redevelop a mid-century modern planned community through the mapping of cultural influences that shaped it? We explored memory and heritage central to cultural mapping and its participatory-based forms of public inquiry. 54 drawings integrate maps, folklore materials, archived media, photographs, and new drawings into five synchronic cultural frameworks that shaped Cherokee Village—Native American heritage, Ozark pioneer and folk heritage, camping and scouting, midcentury planned communities, and regional modernism in design and planning.

Cherokee Village was developed within a mid-twentieth century planning ethos that valued uniformity …

Zno Varistors – The Ideal Microstructure And Characteristics, And Methods Investigated And Developed To Achieve These, Maura Kelleher

Books/Book Chapters

ZnO-Bi2O3-Sb2O3 varistors have been extensively studied since their discovery 5 decades ago. Their function in protecting increasingly sensitive electronic components by absorbing random surges of energy is even more important today. Also, the metal oxides from which they are made from are becoming even more precious. Their electrical characteristics are highly dependent on their microstructural characteristics which are highly dependent on their composition and methods used. The purpose of this article is to explain the ideal microstructure required to obtain the ideal electrical characteristics, the powder preparation methods investigated and developed to achieve it, and some future directions are outlined.