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Articles 5611 - 5640 of 9780
Full-Text Articles in Engineering
Relating Throttled Hybrid Motor Performance To Oxidizer-To-Fuel Ratio, Trevor Coombs
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 …
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 …
Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Sub-Critical And Supercritical Regions, Md Sajedul Islam Sakir
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 …
Investigation Of Different Equations Of State (Eos) To Calculate Thermodynamic Properties Of Methanol In Subcritical And Supercritical Regions, Md Sajedul Islam Sakir
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 …
Electric School Buses: Optimal Routing & Partial Charging, Megh Kc
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 …
Characteristics Of Future Mobility Devices For Individuals With Paraplegia, Dan O'Crowley
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 …
Optimizing Treatment Of Cytomegalovirus, Alisa Dabb
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.
The Pragmatic Role Of Artificial Intelligence In Digitalizing Dentistry, Josh Jaison, Rupanjan Roy
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.
Renewable Resources Based Optimal Scheduling Of A Virtual Power Plant In A Multi-Objective Framework, Anubhav Kumar Pandey, Vinay Kumar Jadoun, Jayalakshmi N. S
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.
Mobile Phones, Cervical Posture, And Developmental Malocclusions: Are They Preventable?, Sree Mayukha Adusumilli, Karuna Y. M
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.
Computer-Assisted Surgical Model For Oral And Maxillofacial Surgery Using Virtual Reality, Shreenidhi H. Bhat, Hareesha K. S, Abhay T. Kamath, Adarsh Kudva
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.
Data-Shift Detection For Reliable And Trustworthy Machine Learning, Akshat Jaggi, Sanjay Singh
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.
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
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.
Matlab Algorithms To Fpga Based Architecture Mapping And Performance Verification, Harish Bhat N, Shreesha Chokkadi, Satish Shenoy B
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.
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
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.
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 …
A Fundamental Approach In Assessing The Improvement Of A Vehicle's Engine By Varying The Cooling Fluid And The Engine, Peter Okereke
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 …
High Frequency Radio Communication, Tyler Larsen
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.
Active Energy Management Of Hybrid Lithium-Ion Batteries For Electric Vehicle Applications, Marium Rasheed
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 …
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
Browse all Datasets
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 …
Mitigating Inaudible Ultrasound Attacks On Voice Assistants With Acoustic Metamaterials, Joshua S. Lloyd, Cole G. Ludwikowski, Cyrus Malik, Chen Shen
Mitigating Inaudible Ultrasound Attacks On Voice Assistants With Acoustic Metamaterials, Joshua S. Lloyd, Cole G. Ludwikowski, Cyrus Malik, Chen Shen
Henry M. Rowan College of Engineering Departmental Research
Voice assistants play an important role in facilitating human–machine interactions and have been widely used in audio consumer electronic products. However, it has been shown that they are susceptible to inaudible attacks in which the malicious signals are in the ultrasound regime and cannot be heard by human ears. In this study, we show that a judiciously designed acoustic metamaterial filter can mitigate such attacks by modulating the received signals by the microphones. The metamaterial filter is composed of rigid plates with individual holes which exhibit local resonance phenomena that suppress incoming waves at specific frequencies. The effectiveness of the …
Dynamic Target Assignment Of Multiple Unmanned Aerial Vehicles Based On Clustering Of Network Nodes, Tuo Zhao, Hanqiang Deng, Jialong Gao, Jian Huang
Dynamic Target Assignment Of Multiple Unmanned Aerial Vehicles Based On Clustering Of Network Nodes, Tuo Zhao, Hanqiang Deng, Jialong Gao, Jian Huang
Journal of System Simulation
Abstract: In order to solve the problem that the distributed multi-UAV target assignment algorithm is prone to communication redundancy, which leads to the large communication scale of formation, a multi-UAV dynamic target assignment algorithm (CU-CBBA) based on node clustering in communication network is proposed.The algorithm introduces the communication network node grouping clustering strategy. According to the node's degree centrality, feature vector centrality, intermediate centrality and other attributes, the network node importance ranking model is established. A group of key nodes in the network topology structure are selected and the network topology node clustering is completed according to the shortest …
Research On Modeling And Scheduling Of Virtual Power Plant With Dual Demand Response, Qiang Chen, Yi Wang, Kangshun Li
Research On Modeling And Scheduling Of Virtual Power Plant With Dual Demand Response, Qiang Chen, Yi Wang, Kangshun Li
Journal of System Simulation
Abstract: Virtual power plant technology provides an effective means to aggregate distributed power and user side resources to participate in power scheduling. Most of the existing research focus on the scheduling optimization of distributed energy instead of the demand response of user side. The user side resources are divided into contracted reliable response load and non-contracted random response load, and the load response is regulated through price adjustment mechanism to adapt to the change of distributed. A virtual power plant optimal scheduling model with dual demands response is constructed, in which the maximizing overall profit of the power grid is …
Voltage And Reactive Power Combinational Evaluation Of Regional Power Grid Based On Ewm-Ahp-Bp Neural Network, Yuqi Ji, Huan Xie, Shaoyu Shi, Ping He, Nan Jin, Huili Wang
Voltage And Reactive Power Combinational Evaluation Of Regional Power Grid Based On Ewm-Ahp-Bp Neural Network, Yuqi Ji, Huan Xie, Shaoyu Shi, Ping He, Nan Jin, Huili Wang
Journal of System Simulation
Abstract: In order to quantitatively evaluate the influence of renewable energy access on voltage and reactive power operation, a combinational evaluation method of voltage and reactive power based on EWM-AHP-BP neural network is proposed to carry out the multi-objective evaluation weight calculation. Considering voltage qualified rate, voltage fluctuation, power factor qualified rate and reactive power reserve, the comprehensive evaluation model is established. The operation data of renewable energy and power load are clustered to divide the typical scenarios and the evaluation model under multiple scenarios is scored by the combination method of entropy weight method and analytic hierarchy process. The …
Research On Modeling And Solution Method Of Operational Tasks Assignment, Yue Ma, Lin Wu, Shengming Guo
Research On Modeling And Solution Method Of Operational Tasks Assignment, Yue Ma, Lin Wu, Shengming Guo
Journal of System Simulation
Abstract: Aiming at the prewar operational tasks assignment in operation task planning, a multi constraint model of operational tasks assignment is constructed to describe the dynamic mapping relationship between operational tasks and operational units. The solution strategy of decision space pruning and constraint condition judgment is proposed, and the methods of decision variable coding, assignment scheme decoding and phased fitness calculation are described. Differential evolution algorithm is used to work out the solution. The experimental results show that the multi constraint assignment model and solution algorithm can effectively reduce the scale of decision space, and can improve the rationality …
Knowledge Graph-Based Process Knowledge Reasoning Method For Intelligent Production System, Weikai Yang, Yan Wang, Zhicheng Ji
Knowledge Graph-Based Process Knowledge Reasoning Method For Intelligent Production System, Weikai Yang, Yan Wang, Zhicheng Ji
Journal of System Simulation
Abstract: Aiming at the disadvantages of high redundancy and weakness between knowledge and data in intelligent production system, and the difficulty to perform knowledge reasoning, a process knowledge reasoning method for knowledge maps is proposed. The input information is semantically labeled and classified, the characteristics of the information match are extracted, the extracted local feature and global feature are associated through graph convolution method, and the feature of the difference value information is integrated and mapped with the constructed knowledge graph. Different reasoning rules are used according to different reasoning types, and the association and topology information between instances are …
A High-Strength Precipitation Hardened Cobalt-Free High-Entropy Alloy, Matthew Luebbe, Jiaqi Duan, Fan Zhang, Jonathan Poplawsky, Hans Pommeranke, Maalavan Arivu, Andrew Hoffman, Mario Buchely, Haiming Wen
A High-Strength Precipitation Hardened Cobalt-Free High-Entropy Alloy, Matthew Luebbe, Jiaqi Duan, Fan Zhang, Jonathan Poplawsky, Hans Pommeranke, Maalavan Arivu, Andrew Hoffman, Mario Buchely, Haiming Wen
Materials Science and Engineering Faculty Research & Creative Works
Recent studies on precipitation-hardened high-entropy alloys (HEAs) demonstrate their high strength and thermal stability, making them promising materials for high-temperature structural applications such as nuclear reactors. However, many existing HEAs contain cobalt (Co), which is unsuitable for nuclear applications because of the long-term activation issue of Co. Co is also expensive and considered a critical material for other applications. Therefore, it is desired to exclude Co from the composition. a Co-free (Fe0.3Ni0.3Mn0.3Cr0.1)88Ti4Al8 HEA was developed and studied in this work. in contrast to previous Co-free HEAs, this alloy is close to Equi atomic in its composition and promises a more …
On The Performance Enhancement Of Beamspace Mimo And Non-Orthogonal Multiple Access For Future Cellular Networks, Sinasi Cetinkaya
On The Performance Enhancement Of Beamspace Mimo And Non-Orthogonal Multiple Access For Future Cellular Networks, Sinasi Cetinkaya
USF Tampa Graduate Theses and Dissertations
The ever-growing demand for higher data rates and greater data capacity at lower cost has led the mobile cellular industry to investigate new physical layer techniques and possible utilization of unused spectrums at higher frequencies for next-generation cellular networks. Thus, exploitation of the millimeter-wave (mmWave) spectrum and non-orthogonal multiple-access (NOMA) have been envisioned as the most promising enablers in meeting capacity demand. Due to the smaller wavelengths offered in mmWave frequencies, it is possible to deploy many antennas into a relatively smaller physical space in mmWave frequencies. This property leads to a promising integration between mmWave and massive multiple-input multiple-output …
Dual Resource Constrained Flexible Job Shop Energy-Saving Scheduling Considering Delivery Time, Hongliang Zhang, Jingru Xu, Bo Tan, Gongjie Xu
Dual Resource Constrained Flexible Job Shop Energy-Saving Scheduling Considering Delivery Time, Hongliang Zhang, Jingru Xu, Bo Tan, Gongjie Xu
Journal of System Simulation
Abstract: To handle the flexible job shop energy-saving scheduling with machines and workers constraints, on the considering of delivery time, the optimization model of dual resource constrained flexible job shop energy-saving scheduling is established with the goal of minimizing the total earliness and tardiness penalties, and total energy consumption. An improved non-dominated sorting genetic algorithm II(INSGA-II) is proposed. Aiming at the optimized objectives, a three-stage decoding method is designed to gain more feasible solutions. The dynamic adaptive crossover and mutation operators are applied to get more excellent individuals. The crowding distance is improved to obtain a population with better …
Research On Improvement Of Social Force Model Based On Non-Motor Vehicle Active Overtaking Behavior, Minghui Yang, Rui Zhang, Qiaobing Yan, Jiahe Wang
Research On Improvement Of Social Force Model Based On Non-Motor Vehicle Active Overtaking Behavior, Minghui Yang, Rui Zhang, Qiaobing Yan, Jiahe Wang
Journal of System Simulation
Abstract: Aiming at the social force model not to illustrate the active overtaking behavior of the rear non-motor vehicle to the front vehicle, an improved social force model is proposed. The traffic behavior characteristics of non-motorized vehicles mixed flow during the active overtaking is analyzed. Considering the compressible characteristics of non-motorized vehicle distancing in different density environments, the model is improved by presenting the concept of dynamic perception space and introducing the overtaking force into the social force model. The model is verified by analyzing the active overtaking behavior, active overtaking distance and speed-density basic graphs. The results indicate that …