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Articles 28651 - 28680 of 196383

Full-Text Articles in Engineering

Advances In Alkaline Water Electrolysis And Way Forward: A Review, Manjur Basnet Apr 2023

Advances In Alkaline Water Electrolysis And Way Forward: A Review, Manjur Basnet

Student Research Symposium

Low cost and large stack manufacturing have favored the commercialization of low temperature Alkaline Electrolyzers (AEL). However, due to the nature of its operation at lower current density and temperature, AEL systems have a lower hydrogen production rate and efficiency as compared to its counterparts, PEM (Proton Exchange Membranes) and SOE (Solid-Oxide Electrolysis). Studies related to the use of higher temperature and use of advanced materials for diaphragm and electrocatalysts have been conducted. These studies are aimed at improving the performance of AEL systems without significantly increasing the cost. This study focuses on a review study of the existing technologies …

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Improving Intersection Safety With Geographically-Targeted Crash Prediction Models In Utah, Atul Subedi Apr 2023

Improving Intersection Safety With Geographically-Targeted Crash Prediction Models In Utah, Atul Subedi

Student Research Symposium

This project aims to improve intersection safety in Utah by developing geographically-targeted crash prediction models. The lack of research investigating active mode crashes at signalized intersections in different geographical regions calls for this study. The objective of this research is to understand the factors associated with the frequency of active mode crashes at signalized intersections. Exposure variables such as AADT, pedestrian and bicycle volumes, and intersection-level variables such as crossing distance, speed limit, and presence of street lights were analyzed using a negative binomial regression model.

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A Unified Approach That Makes Online Taxi Service More Effective, Jiyao Li Apr 2023

A Unified Approach That Makes Online Taxi Service More Effective, Jiyao Li

Student Research Symposium

We propose a unified approach for scheduling taxis across a city. Balancing the supplies and demands on a city scale is a challenging problem in the field of online taxi services. To tackle the problem, we design a unified approach considering two important processes: Taxi-Rider Matching and Taxi Guidance. In the Taxi-Rider Matching, with the help of Lottery Selection (LS) and smoothed popularity score, the approach can balance supplies and demands well, both in the local neighborhood areas and hot places across the city. Regarding Taxi Guidance, we propose Q-learning Idle Movement (QIM) to direct vacant taxis to the most …

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New Rocket Fuel Blend For Hybrid Rocket Ignition Enhancement, Ryan Thibaudeau Apr 2023

New Rocket Fuel Blend For Hybrid Rocket Ignition Enhancement, Ryan Thibaudeau

Student Research Symposium

This work describes and compares different methods of ignition for hybrid rockets using acrylonitrile butadiene styrene (ABS) as the fuel and high-test hydrogen peroxide (HTP) as the oxidizer. Additionally, the work provides an overview of the current state of the art regarding ignition of HTP hybrid rockets. The approach to ignition methods using gaseous oxygen (GOX) pre-lead and catalytic ignition configurations are presented. The manufacturing process and testing results of a unique catalyst-infused fuel grain is presented as the optimal solution to overcome ignition latencies present in HTP-ABS hybrid rockets.

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Understanding And Minimizing The Effects Of Propellant Mean Bulk Temperature Changes In Solid Rocket Motors, Thomas Sorensen Apr 2023

Understanding And Minimizing The Effects Of Propellant Mean Bulk Temperature Changes In Solid Rocket Motors, Thomas Sorensen

Student Research Symposium

Solid rocket propellant typically contains the geometry of an extruded annulus. This propellant, when ignited, burns radially at a rate called the “burn rate”. This rate dramatically affects important motor performance characteristics such as pressure, thrust, and specific impulse. Each different mixture of solid rocket propellant has a sensitivity to initial propellant temperature. The relationship between burn rate and initial temperature sensitivity function are each determined experimentally. This literature review will analyze existing experimental data. The objective of the research is to see if there is a reliable way to predict the burning rate’s temperature sensitivity prior to obtaining new …

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Reclaiming Fault Resilience And Energy Efficiency With Enhanced Performance In Low Power Architectures, Noel Daniel Gundi Apr 2023

Reclaiming Fault Resilience And Energy Efficiency With Enhanced Performance In Low Power Architectures, Noel Daniel Gundi

Student Research Symposium

Shrinking technology node and the massive increase in data workloads has witnessed a swift migration of the system towards the Low-Power Computing (LPC) paradigm. Additionally, to accelerate the redundant yet mammoth AI instructions, novel ASIC design architectures have been explored. Google’s Tensor Processing Unit (TPU) is one such architectural innovation deployed in the commercial space to speedup the processing of AI workloads. In an effort to achieve a superior energy efficiency, Near-Threshold Computing (NTC) has been marginalized to be an efficient LPC paradigm. Due to an underscaling of voltage, NTC offers quadratic savings is power consumption in comparison to operating …

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Controlling Oxidizer-Fuel Ratio With Vortex Injection In Hybrid Rockets, Max Francom Apr 2023

Controlling Oxidizer-Fuel Ratio With Vortex Injection In Hybrid Rockets, Max Francom

Student Research Symposium

Hybrid motors have existed as a hypothetical propulsion system for decades in a wide range of upper stage rocket motors due to their simple, robust, non-toxic, and versatile nature. However, inherent to hybrids is oxidizer:Fuel ratio (O:F Ratio) shift over time, the elimination of which would remove many potential barriers to hybrid rocket motor usage in most spaceflight applications. The most important and difficult part of analytical models of hybrid rockets is the regression/combustion rate of hybrid fuel. O:F Ratio control is fully dependent on the ability to manipulate this regression independently of Oxidizer mass input. One potential method of …

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In-Situ Optical Measurements Of Combustion Plumes, Cara Frischkorn Apr 2023

In-Situ Optical Measurements Of Combustion Plumes, Cara Frischkorn

Student Research Symposium

The exhaust plumes of rocket and jet propulsion systems feature highly-oxidizing, potentially corrosive, extremely high temperature flows. The hostility of these environments makes obtaining in-situ thermal flow measurements extremely difficult. The conventional method for these measurements uses Gardon heat-flux gauges requiring complex and highly invasive installations which cannot be used for flight applications. More recent work has used fiberoptic cable installations to sense internal flow conditions of hybrid and solid fuel rockets. In this configuration, fiber optic cables inserted through the fuel and into the flow are consumed by the flame as the fuel surfaces pyrolyze, but the cable tips …

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A New Framework To Assess The Individual Fairness Of Probabilistic Classifiers, Muhammad Fawad Akbar Khan Apr 2023

A New Framework To Assess The Individual Fairness Of Probabilistic Classifiers, Muhammad Fawad Akbar Khan

Student Research Symposium

Fairness in machine learning has become a global concern due to the predominance of ML in automated decision-making systems. In comparison to group fairness, individual fairness, which aspires that similar individuals should be treated similarly, has received limited attention due to some challenges. One major challenge is the availability of a proper metric to evaluate individual fairness, especially for probabilistic classifiers. In this study, we propose a framework PCIndFair to assess the individual fairness of probabilistic classifiers. Unlike current individual fairness measures, our framework considers probability distribution rather than the final classification outcome, which is suitable for capturing the dynamic …

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Progress Report On The Effect Of Introducing Biological And Environmental Discipline-Themed Problems In Engineering Mechanics Statics On Students’ Self-Efficacy And Perceived Value Of The Course, Yemisi Oyewola Apr 2023

Progress Report On The Effect Of Introducing Biological And Environmental Discipline-Themed Problems In Engineering Mechanics Statics On Students’ Self-Efficacy And Perceived Value Of The Course, Yemisi Oyewola

Student Research Symposium

This study extends the previous research which examined the effect of introducing biological and environmental discipline-themed problems in Engineering Mechanics Statics on students’ Self-Efficacy (SE) and perceived value (PV) of the course. The previous research was carried out using pooled data from 133 participants over 3 semesters. Additional data from 126 participants were collected over the next two semesters making it a total of 262 participants. The result from the previous study showed a statistically significant increase in the perceived value of the students even though their self-efficacy did not significantly change. However, despite an increased sample size, the result …

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Relating Throttled Hybrid Motor Performance To Oxidizer-To-Fuel Ratio, Trevor Coombs Apr 2023

Relating Throttled Hybrid Motor Performance To Oxidizer-To-Fuel Ratio, Trevor Coombs

Student Research Symposium

A hybrid rocket motor's ability to throttle and restart, along with other desirable traits, drives its potential to be an emerging technology in spaceflight applications. However, the current lack of an ability to maintain an optimal mixture ratio of oxidizer to fuel propellants, O/F ratio, during combustion limits the hybrid motor's overall efficiency. This study quantifies how variations in O/F ratio and combustion chamber pressure, which a throttle valve can indirectly manipulate upstream of the chamber, affect the characteristic velocity (c * ) and specific impulse (Isp) of the motor. The researcher uses an analytical hybrid rocket combustion model and …

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Energy Storage Can Increase The Value And Flexibility Of A Nuclear Power Plant But Makes Plant Economics More Subject To Uncertainty In Electricity Price, Jacob Bryan Apr 2023

Energy Storage Can Increase The Value And Flexibility Of A Nuclear Power Plant But Makes Plant Economics More Subject To Uncertainty In Electricity Price, Jacob Bryan

Student Research Symposium

Regional electricity markets currently rely heavily on coal and natural gas resources to meet electricity demand. Intermittent renewable resources like wind and solar power are location-dependent and are not dispatchable resources. Flexible nuclear power, achieved through the use of integrated thermal energy storage, may be able to complement these renewable resources to provide clean, predictable power in an evolving electricity grid. This study considers such a flexible nuclear plant and seeks to address a fundamental modeling question: which uncertain model inputs have a significant effect on the economics of the system, and to what degree? These questions are addressed by …

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Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Sub-Critical And Supercritical Regions, Md Sajedul Islam Sakir Apr 2023

Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Sub-Critical And Supercritical Regions, Md Sajedul Islam Sakir

Student Research Symposium

The Equation of State (EOS) is a relationship between pressure, volume, and temperature that describes the properties of fluids under different conditions. Fluids can exist in various phases, including gaseous, liquid, critical, and supercritical states, each with different properties. The characteristics of critical and supercritical fluids are notably different from those of sub-critical fluids, and their properties change abruptly. To determine fluid properties in different regimes, various equations of state (EOS) are utilized.This research project aims to examine the different equations of state used for specifying fluid properties in various fluid regimes. Methanol has been selected as a working fluid …

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Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Subcritical And Supercritical Regions, Md Sajedul Islam Sakir Apr 2023

Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Subcritical And Supercritical Regions, Md Sajedul Islam Sakir

Student Research Symposium

The Equation of state (EOS) is a PVT relationship that specifies the properties and characteristics of fluids in different conditions. Fluids have different phases. In the subcritical region, fluid is in a gaseous and liquid state. On the other hand, fluid is not a liquid nor a gas in the critical and the supercritical regions. The properties and characteristics of critical and supercritical fluids are different from that of subcritical regions. In critical and supercritical regions the properties of fluid change very abruptly. To specify the properties of the fluid in different regimes different equations of state (EOS) is being …

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Electric School Buses: Optimal Routing & Partial Charging, Megh Kc Apr 2023

Electric School Buses: Optimal Routing & Partial Charging, Megh Kc

Student Research Symposium

The transportation industry is a major contributor to greenhouse gas emissions. The carbon footprint of diesel school buses in the United States is being overlooked despite their significant portion as public transportation. Sense of an urgent need for school bus electrification raises the importance of the effective and efficient operation of school electric buses. However, capital investment, battery range anxiety, charging strategy, and riding time remain significant obstacles to implementing this solution.To address these issues, we have developed a mathematical optimization model that considers the practical constraints of school bus operation and employs a weighted multi-objective function. The model is …

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Characteristics Of Future Mobility Devices For Individuals With Paraplegia, Dan O'Crowley Apr 2023

Characteristics Of Future Mobility Devices For Individuals With Paraplegia, Dan O'Crowley

Student Research Symposium

This presentation outlines wheeled exoskeleton development for individuals with paraplegia and my research to develop criteria for designs focused more on independence and social interactions. A summary of past attempts and comparable mobility devices will be outlined with their strengths and weaknesses. Another section will explain the different activities users should be able to complete independently and what features/functions need to be included for the device to have a positive impact on their social interactions. The presentation will cover the journey of a prototype attempting to meet the criteria developed and lessons learned from that experience. A financial summary will …

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Optimizing Treatment Of Cytomegalovirus, Alisa Dabb Apr 2023

Optimizing Treatment Of Cytomegalovirus, Alisa Dabb

Student Research Symposium

The current treatment to Cytomegalovirus, ganciclovir, kills neutrophils, a type of cell in the immune system. In an effort to reduce the concentration of ganciclovir, quercetin and poloxamer 188 have been added in treatment in a cellular and mouse model. This treatment has been successful, but can be further optimized by reworking the ratio of quercetin to poloxamer 188 and by adding vitamin c to prevent oxidation.

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The Pragmatic Role Of Artificial Intelligence In Digitalizing Dentistry, Josh Jaison, Rupanjan Roy Apr 2023

The Pragmatic Role Of Artificial Intelligence In Digitalizing Dentistry, Josh Jaison, Rupanjan Roy

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Renewable Resources Based Optimal Scheduling Of A Virtual Power Plant In A Multi-Objective Framework, Anubhav Kumar Pandey, Vinay Kumar Jadoun, Jayalakshmi N. S Apr 2023

Renewable Resources Based Optimal Scheduling Of A Virtual Power Plant In A Multi-Objective Framework, Anubhav Kumar Pandey, Vinay Kumar Jadoun, Jayalakshmi N. S

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Mobile Phones, Cervical Posture, And Developmental Malocclusions: Are They Preventable?, Sree Mayukha Adusumilli, Karuna Y. M Apr 2023

Mobile Phones, Cervical Posture, And Developmental Malocclusions: Are They Preventable?, Sree Mayukha Adusumilli, Karuna Y. M

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Computer-Assisted Surgical Model For Oral And Maxillofacial Surgery Using Virtual Reality, Shreenidhi H. Bhat, Hareesha K. S, Abhay T. Kamath, Adarsh Kudva Apr 2023

Computer-Assisted Surgical Model For Oral And Maxillofacial Surgery Using Virtual Reality, Shreenidhi H. Bhat, Hareesha K. S, Abhay T. Kamath, Adarsh Kudva

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Data-Shift Detection For Reliable And Trustworthy Machine Learning, Akshat Jaggi, Sanjay Singh Apr 2023

Data-Shift Detection For Reliable And Trustworthy Machine Learning, Akshat Jaggi, Sanjay Singh

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Analyzing The Impact Of Placement And Sizing Of Electric Vehicle Charging Station In A Grid Integrated Microgrid, Nandini K. K, Jayalakshmi N. S, Vinay Kumar Jadoun Apr 2023

Analyzing The Impact Of Placement And Sizing Of Electric Vehicle Charging Station In A Grid Integrated Microgrid, Nandini K. K, Jayalakshmi N. S, Vinay Kumar Jadoun

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Matlab Algorithms To Fpga Based Architecture Mapping And Performance Verification, Harish Bhat N, Shreesha Chokkadi, Satish Shenoy B Apr 2023

Matlab Algorithms To Fpga Based Architecture Mapping And Performance Verification, Harish Bhat N, Shreesha Chokkadi, Satish Shenoy B

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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A Critical Review On Ultrasound-Assisted Oil-In-Water Emulsification: Insights Into The Formation, Stabilities Of Emulsion And Limitations, Mahima Ganguly, Devangshi Debraj, Jitendra Carpenter Apr 2023

A Critical Review On Ultrasound-Assisted Oil-In-Water Emulsification: Insights Into The Formation, Stabilities Of Emulsion And Limitations, Mahima Ganguly, Devangshi Debraj, Jitendra Carpenter

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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A Fundamental Approach In Assessing The Improvement In The Performance Of A Vehicle's Engine By Varying The Cooling Fluid And The Engine Material, Peter Okereke Apr 2023

A Fundamental Approach In Assessing The Improvement In The Performance Of A Vehicle's Engine By Varying The Cooling Fluid And The Engine Material, Peter Okereke

Student Research Symposium

The cooling system plays a crucial role in regulating the engine's temperature. Cooling fluid is an important component of the cooling system of a vehicle. Using an untailored cooling fluid can have negative effects on an automobile's engine and shorten its lifespan. An efficient cooling system prevents the engine from overheating and enables the vehicle to operate at peak efficiency. This study was conducted to investigate the effectiveness of cylinder materials and various types of cooling agents in the vehicle's cooling system, which affect the engine block's life span, primarily the cylinders, in light vehicle cooling systems. The lower the …

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A Fundamental Approach In Assessing The Improvement Of A Vehicle's Engine By Varying The Cooling Fluid And The Engine, Peter Okereke Apr 2023

A Fundamental Approach In Assessing The Improvement Of A Vehicle's Engine By Varying The Cooling Fluid And The Engine, Peter Okereke

Student Research Symposium

The cooling system plays a crucial role in regulating the engine's temperature. Cooling fluid is an important component of the cooling system of a vehicle. Using an untailored cooling fluid can have negative effects on an automobile's engine and shorten its lifespan. An efficient cooling system prevents the engine from overheating and enables the vehicle to operate at peak efficiency. This study was conducted to investigate the effectiveness of cylinder materials and various types of cooling agents in the vehicle's cooling system, which affect the engine block's life span, primarily the cylinders, in light vehicle cooling systems. The lower the …

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High Frequency Radio Communication, Tyler Larsen Apr 2023

High Frequency Radio Communication, Tyler Larsen

Student Research Symposium

This research focuses on high frequency radio communication and its link to space weather. It examines a signal from beacon networks across the globe and analyzes that signal as it arrives to the antennae here at USU. By linking that data to space weather data we can more accurately see how the signal is being affected.

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Active Energy Management Of Hybrid Lithium-Ion Batteries For Electric Vehicle Applications, Marium Rasheed Apr 2023

Active Energy Management Of Hybrid Lithium-Ion Batteries For Electric Vehicle Applications, Marium Rasheed

Student Research Symposium

Energy storage systems that incorporate hybrid Lithium-ion (Li-ion) battery packs leveraging the energy density and power density characteristics of different Li-ion chemistries have shown promise in reducing weight and volume while improving overall lifetime. A capacitively-coupled architecture, composite hybrid energy storage system (CHESS), has been proposed and demonstrated as a viable design for hybrid energy storage systems that combine energy-dense and power-dense battery packs. However, this architecture requires effective energy balancing among the battery packs to ensure optimal utilization.This work proposes an energy transfer unit (ETU) that consists of modular low-power dc-dc converters configured in a series-input, parallel-output arrangement. This …

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Murine Hearing Abr/Dpoae Assessments In Cmv-Infected Mouse Pups Receiving Peritoneal Antivirals Of Gcv, Quercetin+P188, Or A Combination. Controls Include Infected And Untreated And Non-Infected And Treated. Second Dataset Of Antiviral Assay In A Murine Stria Vascularis (Sv) Monolayer Cell Culture, David Britt, Albert Park Apr 2023

Murine Hearing Abr/Dpoae Assessments In Cmv-Infected Mouse Pups Receiving Peritoneal Antivirals Of Gcv, Quercetin+P188, Or A Combination. Controls Include Infected And Untreated And Non-Infected And Treated. Second Dataset Of Antiviral Assay In A Murine Stria Vascularis (Sv) Monolayer Cell Culture, David Britt, Albert Park

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Ganciclovir (GCV) has been shown to be an effective antiviral for the treatment of congenital cytomegalovirus (cCMV) induced sensorineural hearing loss. However, dose-dependent adverse effects (e.g. neutropenia) require strict, burdensome monitoring, limiting GCV use in some patients. Quercetin is a flavonoid with antioxidant properties that has demonstrated antiviral therapy against CMV. Although more benign than GCV, quercetin has limited therapeutic value due to its poor solubility. We previously reported that GCV improves hearing thresholds in a murine model of cCMV. We also noted that solubilizing quercetin with poloxamer 188 (P188) and combining with GCV therapy amplified CMV inhibition in murine …

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