Digital Commons Network^™

Modeling And Integration Method Of Sysml Model For Complex Business Scenarios, Bing Yu, Baoran An, Shicao Zhao

Journal of System Simulation

Abstract: The development process of complex equipment involves multi-stage business processes, multi-level product architecture, and multi-disciplinary physical processes. The relationship between its system model and various disciplinary models is extremely complicated. In the modeling and integration process, extensive customized development is needed to realize model integration and interoperability in different business scenarios. Meanwhile, the differences in modeling and interaction between different modeling tools make it difficult to support the consistent representation of models in complex scenarios. To improve the efficiency of system modeling and integration in complex business scenarios, a system modeling and integration method was proposed. This method took …

Algorithm And Semi-Physical System Simulation For Command Intent Recognition Of Uav In Low-Resource Environment, Hongfu Liu, Yajing Fu, Wanpeng Zhang, Hu Zhang

Journal of System Simulation

Abstract: When a communication network is partially disabled or disrupted, an UAV is plunged into a "low-resource environment" and must rely on local hardware resources. This situation imposes constraints on computing power, storage capacity, and energy availability. To address the need for command intent recognition in such environments, a semi-physical simulation system for UAV in emergency rescue operations has been designed and implemented. Based on the low resource airborne hardware in the loop, the system simulates UAV command intention recognition and mission planning through GIS+BIM 3D environment modeling task scenarios. A new lightweight algorithm for intent recognition has been proposed, …

Uav Swarm Obstacle Avoidance Based On Visual Filed And Adaptive Radius, Gaohang Ai, Chuntao Li

Journal of System Simulation

Abstract: Aiming at the obstacle avoidance problem of large-scale UAV swarm tracking flight route, a swarm obstacle avoidance algorithm based on distributed model predictive control combined with visual field and adaptive obstacle avoidance radius is proposed. In the process of swarm flight, the UAV obtains the reference route information of the current moment according to its own position, and obtains the predicted trajectory of its neighbors through local information interaction. When encountering obstacles, the adaptive obstacle avoidance radius and field of view topology method are combined to effectively solve the problem that the internal safety distance cannot be maintained and …

A Novel Research Pattern For The Simulation Of Complex Systems Sigd, Bin Chen, Runkang Guo, Zhengqiu Zhu, Yong Zhao, Yatai Ji, Aiguo Chen, Guangquan Cheng

Journal of System Simulation

Abstract: The complexity of the system is mainly reflected in the numerous components and extremely complex interactions. Combined with the current trend of artificial intelligence development, this paper analyzes and considers the changes in thinking mode brought by simulation discipline research, and forms an understanding of the connotation and research scope of simulation intelligence. A new pattern for complex system simulation research is proposed: "simulation intelligence based generating decisions (SIGD)". In the SIGD pattern, the similar principles, modeling methods, and decision-guiding modes in simulation disciplines are different from those in traditional simulation. Under the guidance of this concept, a connection-oriented …

Overcoming Obstacles To Interdisciplinary Research: Empirical Insights And Strategies [Peer-Reviewed Journal], Cristo Leon Ph.D., James Lipuma Ph.D.

STEM for Success Resources

Explore how to overcome obstacles to interdisciplinary research with strategies for transdisciplinary communication, breaking silos, and fostering collaboration. Read insights from Cristo Leon and James Lipuma in this impactful study.

Optimizing The Synthesis And Characterization Of Garnet-Type Thin Film Ceramic Electrolytes For Solid-State Lithium Batteries, Richard Li

Mechanical Engineering and Materials Science Independent Study

This study focuses on the synthesis and characterization of thin-film ceramic electrolytes, specifically Lithium Lanthanum Zirconium Oxide (LLZO) and Lithium Lanthanum Zirconium Tantalum Oxide (LLZTO), for application in solid-state lithium batteries (SSBs). These materials, known for their high ionic conductivity and chemical stability, are critical for enhancing the performance and safety of next-generation energy storage systems. However, stabilizing the high-conductivity cubic phase at room temperature remains a challenge.

To address this, innovative synthesis techniques, including electrospinning and tape casting, were employed to produce nanostructured fibers and films. Various experimental parameters, such as precursor composition, milling conditions, and environmental controls, were …

Mems 411: A Diving Surface Breaker The Jetcycle, Amanda Mclaughlin, Nicholas Harris, Alice Hu, Steven Xiao

Mechanical Engineering Design Project Class

Create a diving surface breaker for the WashU swimming and Diving team.

Optimizing Brake Bias In Formula Sae: A Framework For New And Existing Members, Benjamin Swonger

Mechanical Engineering and Materials Science Independent Study

Formula SAE cars undergo various events where different brake biases are beneficial. Brake bias, the percentage of braking force between the front and rear brakes, plays a crucial role in the car’s overall performance and safety. Correct tuning and diagnostic of the brake system greatly improves stability, minimizes wheel lock-up, and reduces the risk of under and oversteer. This report provides a framework methodology and analysis to optimize brake bias in most situations. The objective is to provide a base knowledge of the brake system that gives new team members a step-by-step guide that simplifies the brake bias calculation and …

Mems 411: Timed Mosquito Egg Container, Daniel Nordquist, Preston Gee, Stephanos Mavrommatis

Mechanical Engineering Design Project Class

To aid in the war against mosquitoes, PHD candidate Lauren Johnson tasked this groups with developing a device to help study egg laying patterns. The goal is to create a device that can cut off access to tea water (an attractive breeding site) at specified time intervals in order to observe the effects of daylight and temperatures on mosquito egg laying behavior.

Development Of Platform And Harness System For In Vivo Rat Elbow Range Of Motion Device And Confirmation Of Ulnar Nerve Integrity In Rats, Genevieve Jarrell

Mechanical Engineering and Materials Science Independent Study

This independent study in Dr. Lake’s Musculoskeletal Soft Tissue Lab focused on two main projects. The first was creating a platform and harness system to secure a rat while its elbow range of motion (ROM) was measured in vivo. Multiple prototypes were designed, 3D printed, and tested on a deceased animal, and each design was improved upon to yield more consistent results. The final prototype yielded semi-consistent results, with further improvements identified and planned. The second project focused on developing a protocol to confirm the integrity of a rat’s ulnar nerve after an ulnar collateral ligament (UCL) transection. Two methods …

Optimizing Mechanical Sensor And Actuator Implementation For Student Makerspace Applications, Nathalie Morton

Mechanical Engineering and Materials Science Independent Study

This independent study aims to create an advanced training module for the Makerspace on sensors and actuators for mechanical applications, guiding users toward more effective sensor selection, actuator control, implementation and troubleshooting of common issues. To support the development of the training module, extensive research was conducted on widely available sensors and actuators compatible with Arduino and Adafruit microprocessors, both of which are commonly available in student Makerspaces. In addition to online research, I reviewed popular maker websites and magazines, such as Make Magazine and Instructables, to identify components that are appropriate for introductory and intermediate-level projects. Through this process, …

Mems 411: The Ez-Push Fsae E-Assisted Pushbar, Ian Snider, Hunter Tate, Erik Lillegard, Maxwell Wrasman

Mechanical Engineering Design Project Class

WashU Racing needs a device that will help them transport their Formula SAE car to and from their garage/paddock during events and testing when the car is unable to move under its own power. Pushing the car is very exhausting and requires at least 2 pairs of people, rotating in and out, to push the car. An electronically assisted push bar would only require two people to push the car and wouldn't experience exhaustion due to pushing the car. This device will function similarly to a shopping cart tug while also functioning as a rear jack for the vehicle that …

Mems 411: Dbf Wind Tunnel, Jeremy Choh, Stefan Hester, David Howard, Yang Yang

Mechanical Engineering Design Project Class

Design, Build, Fly (DBF) is a student-run engineering team at Washington University in St. Louis (WUSTL) that designs aircraft for flight competitions. Before assembling the final product, DBF runs numerous simulations on prototypes to understand the effects of drag and lift on the designed shape. The lift and drag parameters are important to aircraft design, as DBF hopes to optimize flight performance during competitions. However, simulations require computational power, are theoretical at best, and may inaccurately represent real-life situations. Preferably, DBF can use physical testing that captures prototype performance with more qualitative details.

Senior Design Group Z approaches DBF's needs …

Winter Commencement: December 20, 2024, University Of North Dakota

UND Commencement Programs

UND Winter Commencement program from December 20, 2024.

Simulation Of Cascade Failure In Urban Rail Transit Hypernetworks Based On Hypergraph Theory, Zijin Han, Mingjun Qian, Xixian Wang, Kaiyue Zhang

Journal of System Simulation

Abstract: In order to enhance the resilience of urban rail transit networks to ensure stable operations and passenger safety in the face of emergencies, hypergraph theory is introduced to construct a hypergraph based urban rail transit hypernetwork model, and a nonlinear load-capacity cascading failure model based on passenger flow weighting is established. In response to the passenger evacuation process at actual transportation network stations, a load redistribution mechanism is proposed, taking into consideration both the network level and the importance of passenger flow. To address scenarios where stations in actual traffic networks can still accommodate loads during shutdowns, a node …

Research On Digital Twin Simulation Method Of Industrial Robot Integrated With Reinforcement Learning, Tianyue Miao, Lu Wang, Jiaxiao He, Nenggang Xie

Journal of System Simulation

Abstract: In response to the lack of comprehensive functionality and limited application scenarios in the current field of industrial robot digital twin systems, which results in low versatility, a method for constructing a digital twin system for industrial robots with high versatility is proposed. A four-dimensional system architecture for the digital twin is designed, and the components and functions of the four-dimensional system are analyzed, based on the system level planning of the four-dimensional system, the concept of integrating reinforcement learning into the virtual replacement of real concept is defined. By constructing a multi-attribute virtual model and using TCP communication …

The Role Of Innovation Hubs In Driving Local Entrepreneurial Behavior: The Case Of Creativa Innovation Hubs In Qena And Aswan, Lamees Koura

Theses and Dissertations

This study investigated the role of innovation hubs in driving innovation and entrepreneurial behavior among local communities, ultimately contributing to the development of better national entrepreneurship ecosystems. The researcher employed a qualitative methodology using a case study approach to conduct an empirical investigation to obtain deeper insights into the innovation hubs phenomenon using the Creativa Innovation Hubs initiative in two governorates in Upper Egypt, Qena and Aswan. Semi-structured in-depth interviews were conducted with twenty individuals between beneficiaries and managers of Creativa innovation hubs. The study demonstrated that government efforts to promote entrepreneurship through the Creativa Innovation Hubs Initiative significantly influence …

Tensile Strain Validation Of Welded Wire Reinforcement, Alvaro Montes

Theses and Dissertations

There have been historical concerns regarding the ductility of welded wire reinforcement (WWR). Recent changes in ACI 318-19 now require all grades of A615 and Grade 100 A706 nonprestressed steel reinforcement to have a ratio of tensile strength to yield strength greater than 1.10 and 1.17 respectively. Although this code requirement does not currently apply to WWR, this preemptive study investigated the current state of the art of WWR manufactured in North America in preparation for such a possibility. This project included the tensile-testing of approximately 365 WWR material specimens of various cross-sectional sizes to determine the ratio of tensile-to-yield …

An Intelligent System Using Deep Learning For Healthcare Monitoring In Light Of The Covid-19 And Future Pandemics Based On Iot, Sara Salman Qasim, Rajaa J. Khanjar, Jamal Nasir Hasoon, Baesher Abdullateff Abad, Ali Hussein Fadil, Shajan.M. Alsowaidi

Al-Esraa University College Journal for Engineering Sciences

Recently, the Internet of Things has become a compelling research field as a new topic of research in various disciplines, particularly in the field of healthcare, because the Internet of Things is rebuilding modern healthcare systems by integrating technology, economics, and social perspectives. The development of healthcare systems from traditional to more personalized systems in which patients can be easily diagnosed, monitored and treated and many people can be helped. People are treated and cared for remotely and this is what some people need in the crisis the world has been through like COVID-19. This epidemic is caused by the …

Speech Coding Based On A Hybrid Approach: Dct, Huffman And Run-Length Coding, Sundos Abdulameer Alazawi, Esraa Jaffar Baker, Shahbaa Mohammed Abdulmaged

Al-Esraa University College Journal for Engineering Sciences

The exponential expansion of data in the digital world necessitates the development of effective methods for data transmission and storage. Data compression (DC) strategies are suggested to reduce the quantity of data stored or conveyed due to constrained resources. As a result of DC ideas' ability to efficiently use existing storage space and transmission capacity, different methods have been developed in various areas. Speech coding is a lossy method of coding; therefore, the output signal differs slightly from the input signal. Speech coding is useful for message encryption, communication over long distances and speech quality. In the fields of digital …

Predictors Of Sedimentary Organic Carbon In Seagrass Vegetated And Unvegetated Sediment In The Tamar Estuary, United Kingdom, Kathryn Pogson

The Plymouth Student Scientist

Seagrass meadows are considered significant natural carbon sinks due to their ability to store large amounts of organic carbon (C_org) in their sediments. ‘Blue carbon strategies’ aim to utilise and enhance this ability to mitigate climate change. However, assessing the C_org content and the habitat characteristics that influence this, in both seagrass vegetated and adjacent unvegetated sediments is needed to improve ‘Blue Carbon’ assessments. Currently, adjacent unvegetated sediments are excluded from Blue Carbon assessments as investigations rarely incorporate them into study design, despite evidence suggesting that they can also store significant amounts of C_org. Mean …

An In-Depth Analysis And Comparison Of Eco And Non-Eco Surfboard Waxes, Markos Kaskaneas - Efthymiou

The Plymouth Student Scientist

Questions regarding the sustainability of petroleum-based surfboard waxes gave rise to the development and marketing of a sustainable alternative called “Eco” surf wax. The chemistry behind surf waxes is generally unknown and there is no published research on the area of surf waxes. In this analysis, the chemical properties of both types of waxes were investigated, to determine the difference between non-eco and eco waxes and between different water temperature rating waxes. 15 surf wax samples (10 non-eco, 5 eco) were extracted into organic and inorganic fractions and analysed by FT-IR, GC-MS, and HTGC-FID/MS. Multivariate statistical analysis was also performed. …

The Weight Of Words: An Investigation On The Impact Of Stereotypical Body Language On Body Dissatisfaction, Hannah M. Brown

The Plymouth Student Scientist

Body image research is extensive, producing various tools to assess body dissatisfaction and related factors. Despite this, eating disorder rates remain high. This study investigates the relationship between self-schemas, the lexical frameworks of body-related words, and their impact on body shape dissatisfaction. Sociocultural pressures to conform to beauty standards make body image talk ubiquitous and influential. Previous studies primarily used explicit measures, like self-reports, which are subject to biases, whereas implicit measures reveal underlying cognitive mechanisms. This study employed the Stunkard Figure Scale to measure body dissatisfaction and the Body Appreciation Scale 2 to assess body appreciation, examining cognitive biases …

Measurement Of The Mechanical Properties Of Blood Vessels Using A Vascular Simulation Rig, Jack Lockyer

The Plymouth Student Scientist

Understanding the mechanical properties of blood vessels is crucial for reconstructive surgeons who connect donor tissue flaps to recipient sites. This paper describes the development of a vascular simulation test rig that delivers pulsatile flow to a blood vessel sample while continuously monitoring system pressure and sample diameter. These measurements allow for the calculation of the viscous coefficient, an important mechanical property for comparing blood vessels. A pilot test using the rig demonstrates its ability to measure pressure and diameter and highlights necessary improvements to enhance data quality. The pilot test shows that the current rig can measure 5 mm …

Rooting For Resilience: Investigating The Success Of Seagrass Restoration Methods, Olivia K. Stockdale

The Plymouth Student Scientist

Seagrasses generate vital ecosystem services to coastal communities, whilst also protecting marine biodiversity. Despite their significance, seagrass ecosystems face a plethora of threats from both anthropogenic and natural sources, causing a 20 % loss of seagrass area over the last century. To combat this, numerous restoration methods exist for seagrass habitats globally, with varying degrees of success. Through a comprehensive systematic review and subsequent meta-analysis, this study illustrates the varying success rates of different transplant and seed-based restoration methods over differing timescales. Accounting for varying timescales, results showed that restoration method had a significant effect on success rate (χ^{2 …}

Synthesis And Characterisation Of An Acetylcholinesterase Inhibitor, Elijah Rahman-Riding

The Plymouth Student Scientist

Acetylcholinesterase (AChE) inhibitors are currently the only effective treatment for people with Alzheimer’s disease (AD), a fatal neurodegenerative disease that affects 50 million people worldwide at present but is expected to rise dramatically over the next 30 years. The aim of this research was to synthesise an AChE inhibitor derivative of tacrine, 4-chloro-2(((1,2,3,4-tetrahydroacridin-9yl)imino)methyl)phenol (chlorophenol tacrine). This was achieved by first synthesising tacrine, evidencing successful synthesis and assaying purity of the product, then, synthesising a simple derivative, acetyl tacrine, before chlorophenol tacrine. At every stage of the investigation comprehensive structural analysis of each product was obtained using FT-IR, CHN analysis, GC-FID, …

Development Of A Climbing Performance Analysis Tool Using Computer Vision, Guy Ludford

The Plymouth Student Scientist

Indoor bouldering, a rapidly growing sport in the UK and globally, has seen a significant rise in participation, paralleled by an increase in the use of fitness apps and wearable trackers. Despite this growth, tracking and recording metrics for indoor climbing remains a challenge. This paper proposes an automated tool utilising computer vision and a gym-wide camera system to collect data on routes climbed and attempts made, without the need for manual logging. This tool aims to provide climbers with detailed performance analysis and support climbing gyms in optimising route setting and member engagement. Initial market research and discussions with …

Investigation Of The Use Of Nanotechnology In Food Packaging, Ollie-May Woodland

The Plymouth Student Scientist

This review discusses topics related to the use and development of nanotechnology and nanomaterials in food packaging applications. The accelerated use of these technologies brings about relevant safety, environmental, ethical and legislative/ regulatory concerns and as such the aim of this work is to assess the viability of the use of current commercialised nano-enabled packaging and to evaluate the potential future trends in the progression of these technologies against public opinion and potential risk(s). The data for this report was collected through comprehensive research of nanotechnology and its applications, specifically the packaging industry in the food sector. An online survey …

Disability And Transformation: Exploring The Lived Experiences Of Students With Disabilities In South African Higher Education, Hester (Hetsie) Petronella Veitch

Dissertations - ALL

In this dissertation, I explore the lived experiences of students with disabilities in South African higher education within the context of post-apartheid transformation. Using constructivist grounded theory and drawing on Critical Disability Studies, Dis/ability Critical Race Studies (DisCrit), Critical Whiteness Studies, and decolonizing methodologies, in this study, I examine how students make meaning of their educational experiences and how these align with transformation ideals. Through interviews with 16 students, the research reveals the complexities of disability identity, disclosure, institutional support, and the impact of intersecting marginalized identities. Findings highlight a disconnect between institutional rhetoric and students' realities, particularly in creating …

Real-Time Control (Rtc)-Based Urban Flood Risk Assessment Framework For Arid And Semi-Arid Regions, Sulaiman Altami

Dissertations - ALL

Global climate change has recently increased Flood Risk (FR) disasters in arid and semi-arid regions, particularly in Gulf countries, such as the Kingdom of Saudi Arabia (KSA). Arid regions generally face low rain on average during a year, but flash floods occur during rainfall of longer return periods due to urbanization and climate change. Flood Risk Assessment (FRA) outcomes enable municipalities (planners and decision-makers) in arid urban areas to develop flood management strategies and mitigate the issues of drainage systems, which may otherwise affect the quality of life. FRA is an effective tool for not only identifying high-risk areas but …