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Collision avoidance and geofencing for fixed-wing aircraft with control barrier functions
No full textThis is an open access article under the CC BY license.Safety-critical failures often have fatal consequences in aerospace control. Control systems on aircraft, therefore, must ensure the strict satisfaction of safety constraints, preferably with formal guarantees of safe behavior. This article establishes the safety-critical control of fixed-wing aircraft in collision avoidance and geofencing tasks. A control framework is developed wherein a run-time assurance (RTA) system modulates the nominal flight controller of the aircraft whenever necessary to prevent it from colliding with other aircraft or crossing a boundary (geofence) in space. The RTA is formulated as a safety filter using control barrier functions (CBFs) with formal guarantees of safe behavior. CBFs are constructed and compared for a nonlinear kinematic fixed-wing aircraft model. The proposed CBF-based controllers showcase the capability of safely executing simultaneous collision avoidance and geofencing, as demonstrated by simulations on the kinematic model and a high-fidelity dynamical model. © 1993-2012 IEEE
A comprehensive workflow for 3D reconstruction of the female knee from CT data
No full textPublished in SOAR: Shocker Open Access Repository by Wichita State University Libraries Technical Services, November 2025. 2025 IEMS Officers: Gamal Weheba (Conference Chair); Hesham Mahgoub (Program Chair); Dalia Mahgoub (Technical Director); Ed Sawan (Publications Editor); Wilfredo Moscoso (Proceedings Editor); Abdulaziz G. Abdulaziz (Associate Editor)This study focuses on modeling the bone anatomy of the female knee using Computed Tomography (CT) scan data and advanced software tools Materialize Mimics and Geomagic Wrap. By processing radiological images from the Visible Human Project dataset, a comprehensive workflow was established to create detailed 3D models of the patella, femur, tibia, and fibula. Key steps included extracting image slices, creating masks to isolate individual bones, and utilizing precise cleaning and surfacing techniques to refine geometry. Challenges included handling complex bone shapes and ensuring model accuracy for finite element analysis. The process underscores the utility of integrating software tools for medical modeling and lays a foundation for future advancements in personalized healthcare. Additionally, an attempt is made to model the cancellous bone in each of the mentioned bones
The effects of binaural beats on driving performance
No full textPoster and abstract presented at the FYRE in STEM Showcase, 2025.Research project completed at the Department of Psychology.Listening to binaural beats in the gamma range (around 40 Hz) is thought to affect alertness. Binaural beats are a naturally occurring phenomenon in which two sound frequencies presented at the same time to each ear create the perception of a third tone that is the difference between the two frequencies. Recent studies have shown that binaural beats can affect attention and cognition (e.g., alert versus relaxed) depending on the frequency. However, results are inconclusive – likely due to a wide range of methodological issues such as the use of different base frequencies, entrainment durations, and the type of sound used to mask the binaural beat. We hypothesized that listening to binaural beats of 40 Hz embedded in engine noise (relative to a control condition of only engine noise) would increase alertness and improve performance in a simulated driving task. Participants listened to the 40 Hz or control stimuli for a total of 30 minutes (10-minute practice drive, plus 20-minute experimental drive). Data collected to date provides little support for this hypothesis. We found that individuals in the 40 Hz condition made more simulated driving task errors relative to those in the control condition. Data collection is on-going as the current results are preliminary with a sample size of only eight (four in each condition). Further research is needed to examine the validity of using binaural beats to alter attentional state
Reducing transmission line impacts caused by rooftop solar panels using electricity market mechanism
No full textPoster project completed at Wichita State University, Department of Electrical and Computer Engineering and Sunflower Electric Power Corporation, Transmission Planning & Policy.Presented at the 22nd Annual Capitol Graduate Research Summit, Topeka, KS, March 25, 2025.Large penetration of renewable resources creates new challenges for grid operators. The recent FERC ruling on transmission asset depreciation highlights one of the impactful but understudied issues, transmission asset usage and depreciation. Change in line usage can be accounted for by rewarding or penalizing the market participants directly. However, the impact of large penetration of distributed energy resources such as rooftop solar PVs (which do not participate in the electricity wholesale market) on transmission flows needs indirect solutions. This work proposes a market adjustment technique using virtual loads to mitigate the change in line flows caused by distributed resources in multi-area systems. Optimal virtual loads needed at each bus in the day- ahead planning to limit the line flow to a desired level are determined using power transfer distribution factors. The simulation, conducted on a modified IEEE RTS-96 system with real load data and estimated solar data, demonstrates that the average total line flow difference can be mitigated in multi-area network, while the average total conventional generation cost remains largely unchanged. This result shows that the method is highly effective in substantially reducing the transmission line impacts caused by distributed resources. This research was mainly motivated by transmission utility in western Kansas as they have experienced a difference in revenue
Access in nursing education: The interactive process for determining disability accommodations
No full textClick on the DOI link to access this article at the publishers website (may not be free).Nurses with disabilities provide unique perspectives to the nursing field because of their lived experiences as patients and workforce members of the health-care system. Although there is potential to enhance workforce diversity by including nurses with disabilities, barriers to inclusion in nursing education persist. This article aims to address these issues through three mechanisms: clarifying the interactive process for determining accommodations; defining the roles of disability resource professionals, students, and faculty in the accommodations request process; and highlighting the importance of a legally grounded and collaborative approach to accessibility. Promoting access for disabled nursing students requires challenging widespread ableist misconceptions, adopting inclusive teaching strategies, creating proactive policies, developing well-informed faculty, and cultivating an institutional culture that recognizes disability as an essential dimension of diversity. By strengthening these aspects, nursing education can support the full participation of disabled students and ensure a more inclusive and effective health-care workforce
Episode 37 – Coach Paul Mills (MBB)
No full textWichita State President Rick Muma talks with Coach Paul Mills about plans for his third season with Shocker men’s basketball.The “Forward Together” podcast celebrates the vision and mission of Wichita State University. In each episode, President Rick Muma will talk with guests from throughout Shocker Nation to highlight the people and priorities that guide WSU on its road to becoming an essential educational, cultural, and economic driver for Kansas and the greater good
Computational methodology to compute small uncrewed aircraft deflections due to aerodynamic interaction with a rotorcraft
No full textThis is an open access article under the CC BY license.This paper describes the effect of the flow field of a rotorcraft operating under 14 Code of Federal Regulations (CFR) Part 27 requirements on the trajectory of a small Uncrewed Aircraft (UA). We performed the trajectory analyses using Computational Fluid Dynamics (CFD) analysis coupled with a six-degrees-of-freedom (6-DOF) solver. Prescribed trajectories were assigned to the small UA for eight scenarios. The deviations from the prescribed motion due to the aerodynamic interaction with the rotorcraft flow field were monitored. The scenarios combined two rotorcraft flight modes, two UA flight modes, and four release locations. The rotorcraft operating conditions were based on a low-altitude holding flight pattern. We observed that the aerodynamic interaction between the UA and the rotorcraft’s flow field in descent had a minimal effect on the UA’s trajectory. In contrast, the aerodynamic interaction during hover resulted in noticeable changes in both the orientation and location of the UA at the time of impact. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved
Hot nudges on hazy landscapes
No full textThis is an open access article under the CC BY license.Algorithmic decision-making systems trained on massive data sets, or “assistive AI,” has the potential to remove biases and errors in traditional decision-making, according to some behavioral paternalists. Assistive AI’s democratization of expert advice represents as important and socially beneficial a technological advancement as the internet’s democratization of consensus knowledge. Like any other tool, assistive AI has limitations. I model individuals as theory-based decision-makers whose social systems are open-ended and evolve through time—like “hazy landscapes” with unclear horizons. I consider both traditional nudges and “hot nudges,” automated nudges programmed to learn how to effectively influence their targets by collecting personalized data. I demonstrate that in open-ended social systems “hot nudges” on “hazy landscapes” can exacerbate the knowledge deficits of traditional nudges and may have uniquely pernicious effects on advancing non-beneficial policies and suppressing the emergence of beneficial social institutions. © The Author(s) 2025
A history of music in the Czech lands
No full textAvailable in print and online"An overview of major topics connected to the history of musical culture in what is now the Czech Republic. Whereas most previous musicological scholarship focused on music that was understood as ethnically Czech, this book also considers German, Jewish, and Romani musics from the region." (Provided by publisher)Part I: Before 1800. Medieval Traditions of Plainchant in Bohemia / Hana Vlhová-Wörner ; Medieval Music and Czech National Identity / Viktor Velek* ; Liturgical Music of the Bohemian Reformation / Martin Horyna+ ; Music at the Royal and Imperial Court in Prague / Erika Honisch ; Music in the Catholic Reformation of Seventeenth-Century Bohemia / Geoffrey Chew ; Music in Bohemian Royal Coronations and Opera in Prague in the Seventeenth and Eighteenth Centuries / Marc Niubò* ; Aristocratic Patronage of Music in the Bohemian Crownlands : A Series of Vignettes / Jana Perutková* ; The Bohemian Kapellknaben Ensemble of Dresden's Catholic Court Church / Janice Stockigt -- Part II: The "Long" Nineteenth Century. Bohemian Public Music Institutions and National Politics / Martin Nedbal ; The Emergence of Czech National Opera Tradition in the Nineteenth Century / Jiří Kopecký* ; Women and Opera in the Czech Lands / Judith Mabary ; Bohemian Salon Culture in 1820s and 1830s Teplice / Anja Bunzel ; "The Very Bosom of our Nation" : The Dialectic of Folk and Art Music in Bedřich Smetana's Hubička and Dvě vdovy / Christopher Campo-Bowen ; Choral Music and Modernity in the Bohemian Crownlands in the Nineteenth Century / Karel Šima* ; Symphonic Music in Nineteenth-Century Czech Lands / Eva Branda ; The Politics of Bohemian Music Criticism and Historiography from Late Eighteenth to Late Twentieth Century / Martin Nedbal and Kelly St. Pierre ; Public Music Education and the Prague Conservatory / Lenka Křupková* -- Part III: Twentieth Century and Beyond. The Mutual Exclusion Society : Musicology and Criticism in Early Twentieth-Century Prague / Brian Locke ; Janáček's Jenůfa and Operatic Modernism / Jiří Zahrádka* ; Avant-garde Aspects of Czech Interwar Music / Miloš Zapletal* ; The Jewish Musical Experience in the Czech Lands / Michael Beckerman ; Czechoslovak Musicians in North American Exile / Brian Locke and Martin Nedbal ; Categorizing Music, Classifying People : Music Research and Race Studies in the Czech Lands / Kelly St. Pierre ; The Nation's Image in Songs : Folk Music Research and Revival in the Twentieth Century / Matěj Kratochvíl* ; Romani Music in the Czech Republic / Zuzana Jurková* ; Decolonial Resonances in Czech Opera after 1948 / Tereza Havelková ; Jazz as Sound for the Stage : The Liberated Theater and its Progeny / David Vondráček* ; Understanding Czech Rock from the Period of Normalization / Jan Blüml* ; Czech Film Music / Aleš Březina* ; Czechs in Search of Slovak Music / Vladimír Zvara* ; Twentieth-Century Czech Female Composers in Cultural and Political Context : The Pre-1989 Music of Ivana Loudová and Sylvie Bodorová / Miriam Blümlová* ; Czech Classical Music in a Global World : Jakub Hrůša in Conversation with Aleš Březina / Aleš Březina and Jakub Hrůša*