722 research outputs found

    2023-2024 Catalog

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    The 2023-2024 Governors State University Undergraduate and Graduate Catalog is a comprehensive listing of current information regarding:Degree RequirementsCourse OfferingsUndergraduate and Graduate Rules and Regulation

    Beam scanning by liquid-crystal biasing in a modified SIW structure

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    A fixed-frequency beam-scanning 1D antenna based on Liquid Crystals (LCs) is designed for application in 2D scanning with lateral alignment. The 2D array environment imposes full decoupling of adjacent 1D antennas, which often conflicts with the LC requirement of DC biasing: the proposed design accommodates both. The LC medium is placed inside a Substrate Integrated Waveguide (SIW) modified to work as a Groove Gap Waveguide, with radiating slots etched on the upper broad wall, that radiates as a Leaky-Wave Antenna (LWA). This allows effective application of the DC bias voltage needed for tuning the LCs. At the same time, the RF field remains laterally confined, enabling the possibility to lay several antennas in parallel and achieve 2D beam scanning. The design is validated by simulation employing the actual properties of a commercial LC medium

    2023- The Twenty-seventh Annual Symposium of Student Scholars

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    The full program book from the Twenty-seventh Annual Symposium of Student Scholars, held on April 18-21, 2023. Includes abstracts from the presentations and posters.https://digitalcommons.kennesaw.edu/sssprograms/1027/thumbnail.jp

    MODELING OF INNOVATIVE LIGHTER-THAN-AIR UAV FOR LOGISTICS, SURVEILLANCE AND RESCUE OPERATIONS

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    An unmanned aerial vehicle (UAV) is an aircraft that can operate without the presence of pilots, either through remote control or automated systems. The first part of the dissertation provides an overview of the various types of UAVs and their design features. The second section delves into specific experiences using UAVs as part of an automated monitoring system to identify potential problems such as pipeline leaks or equipment damage by conducting airborne surveys.Lighter-than-air UAVs, such as airships, can be used for various applications, from aerial photography, including surveying terrain, monitoring an area for security purposes and gathering information about weather patterns to surveillance. The third part reveals the applications of UAVs for assisting in search and rescue operations in disaster situations and transporting natural gas. Using PowerSim software, a model of airship behaviour was created to analyze the sprint-and-drift concept and study methods of increasing the operational time of airships while having a lower environmental impact when compared to a constantly switched-on engine. The analysis provided a reliable percentage of finding the victim during patrolling operations, although it did not account for victim behaviour. The study has also shown that airships may serve as a viable alternative to pipeline transportation for natural gas. The technology has the potential to revolutionize natural gas transportation, optimizing efficiency and reducing environmental impact. Additionally, airships have a unique advantage in accessing remote and otherwise inaccessible areas, providing significant benefits in the energy sector. The employment of this technology was studied to be effective in specific scenarios, and it will be worth continuing to study it for a positive impact on society and the environment

    Running Shoe Pedometer

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    Running shoe pedometer aims to solve the issue of worn out running shoes. It can be difficult to know just how many miles you have run in your shoes and when a new pair is needed. Running in old shoes and worn out shoes is heavily linked to injury. My proposed project is a device that is powered by the compressive forces on the shoes soles that counts the number of steps the wearer takes using a microcontroller. Then, when the shoe reaches milestone that indicate it has been used 75% 90% and 100% of its expected life, it will output the information to the user. In order to output the wear life of the shoes to the user, a series of color changing chemical reactions will be used. These reactions will most likely be acid/base with some type of indicator or an electrochromic material. These color changes will allow the user to see that their shoes are worn out. The device should be extremely low cost so that it can be built into a running shoe and disposed of when the shoe is worn out

    1-D broadside-radiating leaky-wave antenna based on a numerically synthesized impedance surface

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    A newly-developed deterministic numerical technique for the automated design of metasurface antennas is applied here for the first time to the design of a 1-D printed Leaky-Wave Antenna (LWA) for broadside radiation. The surface impedance synthesis process does not require any a priori knowledge on the impedance pattern, and starts from a mask constraint on the desired far-field and practical bounds on the unit cell impedance values. The designed reactance surface for broadside radiation exhibits a non conventional patterning; this highlights the merit of using an automated design process for a design well known to be challenging for analytical methods. The antenna is physically implemented with an array of metal strips with varying gap widths and simulation results show very good agreement with the predicted performance

    Hands-on Science. Celebrating Science and Science Education

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    The book herein aims to contribute to the improvement of Science Education in our schools and to an effective implementation of a sound widespread scientific literacy at all levels of society

    Sensitive and Makeable Computational Materials for the Creation of Smart Everyday Objects

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    The vision of computational materials is to create smart everyday objects using the materi- als that have sensing and computational capabilities embedded into them. However, today’s development of computational materials is limited because its interfaces (i.e. sensors) are unable to support wide ranges of human interactions , and withstand the fabrication meth- ods of everyday objects (e.g. cutting and assembling). These barriers hinder citizens from creating smart every day objects using computational materials on a large scale. To overcome the barriers, this dissertation presents the approaches to develop compu- tational materials to be 1) sensitive to a wide variety of user interactions, including explicit interactions (e.g. user inputs) and implicit interactions (e.g. user contexts), and 2) makeable against a wide range of fabrication operations, such cutting and assembling. I exemplify the approaches through five research projects on two common materials, textile and wood. For each project, I explore how a material interface can be made to sense user inputs or activities, and how it can be optimized to balance sensitivity and fabrication complexity. I discuss the sensing algorithms and machine learning model to interpret the sensor data as high-level abstraction and interaction. I show the practical applications of developed computational materials. I demonstrate the evaluation study to validate their performance and robustness. In the end of this dissertation, I summarize the contributions of my thesis and discuss future directions for the vision of computational materials

    Feasibility of a surface electromyography-based compression garment for monitoring internal player load in professional basketball

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    The psychophysiological demands placed on professional athletes nowadays is greater than ever. In fact, professional basketball players can compete up to three time per week in addition to frequent and regular training sessions. Thus, adequately prescribing and monitoring athletes’ loads is important to maintain player well-being, reduce fatigue while optimising performance. Therefore, sport science research is saturated with different internal and external load monitoring approaches to help teams achieve these goals. Expansion of the global wearable technology market in sport is ever growing as practitioners seek a competitive advantage to their competitors. One such technology which has clinically and extensively been used for decades but has entered a new era into the wearable technology field in sport is surface electromyography (sEMG). However, little research reports on this technology in sport and the internal load metrics which representative companies claim it can report. The purpose of this doctoral thesis was to comprehensively examine internal load experienced by professional basketball players in the British Basketball League (BBL), while investigating a wearable sEMG technology for reporting a novel sEMG-based internal load metric (“Training Load”) during controlled lab-based exercise protocols, as well as determine the feasibility of the wearable sEMG-based internal load monitoring system in the professional basketball environment. The first observational study assessed the internal load experienced by professional basketball players during an entire season in the BBL. The research used the session-rating of perceived exertion (sRPE) method for quantifying load in professional basketball players following training sessions and competition. Results show that players experience greater Weekly Load (training only) during preseason compared to the in-season phase. Weekly Load is greater in 1-game weeks compared to 2-game weeks, while Total Weekly Load (training and competition) is higher during 2-game weeks compared to 1-game weeks. In addition, starting players experience a moderately higher Total Weekly Load compared to bench players, yet playing status did not result in differences in Weekly Load. The results show variances in internal load depending on weekly game fixtures, training schedules and phases of the season. While the sRPE method provides a valid global measurement of the training session or competition, the nature of retrieving RPE’s from players by asking a question prevents deeper investigation of internal load from specific phases of play. The second investigative study explores the possibility of using a novel wearable sEMG garment for capturing internal load (Training Load). The research investigated the sEMG derived Training Load during a 3-speed treadmill test and its relationship with oxygen consumption (V̇O2) during an exhaustive ramp incremental running treadmill test to determine maximal oxygen uptake (V̇O2max). Findings demonstrate sEMG-derived Training Load is a sensitive measure in detecting small changes in work rate during dynamic exercise, and while a moderate positive correlation between %V̇O2 max is shown, 80% of participants’ Training Loads show a very strong positive correlation at the individual level. The findings conclude that wearable sEMG technology may provide an alternative and new approach to capturing players internal load during sport and dynamic, whole-body exercise. The third study investigates the feasibility, practicality, and acceptability of wearable sEMG technology in the professional basketball environment. Results show a high acceptance rate (seventy-five percent) of the sEMG technology amongst professional basketball players, who report they would use the wearable sEMG technology again during team basketball training. A minority of players (twenty-five percent) report they would not use the wearable sEMG technology again due to negative experiences such as, comfortability issues and perceived negative effects on performance. While the wearable sEMG technology is relatively feasible in the environment, a few practical implications are considered important for coaches to understand before use. In particular, the time taken for downloading data to report to coaching staff or players takes longer than other load monitoring systems, such as GPS. In addition, the technology is more suited to the professional environment where a kit manager takes care of the handling procedures associated with the shorts. Lastly, the Core unit attached to the shorts can interrupt training practice. The current thesis contributes original research to the field of wearable sEMG for monitoring internal load. Findings provide important implications for practitioners endeavouring to use wearable sEMG in a professional sport context or research to further extent. Most research in basketball is conducted internationally, within Europe and America. The thesis is one of the first studies to identify internal loads in professional male basketball players within the United Kingdom. The thesis was the first to investigate an sEMG-derived Training Load during specific running tests. Lastly, the thesis was the first to assess professional athletes’ perceptions on wearable sEMG technology, highlighting reasons for and against using the technology
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