• The Effects of Compressibility on the Performance and Modal Structures of a Sweeping Jet Emitted from Various Scales of a Fluidic Oscillator 

  Portillo, Daniel J.; Hoffman, Eugene; Garcia, Matt; LaLonde, Elijah; Combs, Christopher; Hood, R. Lyle (2022-07-21)

  Investigations of fluidic oscillators, or sweeping jet actuators, have primarily been conducted within the incompressible flow regime, which limits the accuracy of estimating fluidic oscillator performance for compressible ...

• Defense against Adversarial Swarms with Parameter Uncertainty 

  Walton, Claire; Kaminer, Isaac; Gong, Qi; Clark, Abram H.; Tsatsanifos, Theodoros (2022-06-24)

  This paper addresses the problem of optimal defense of a high-value unit (HVU) against a large-scale swarm attack. We discuss multiple models for intra-swarm cooperation strategies and provide a framework for combining ...

• How Gender Affects Motor Vehicle Crashes: A Case Study from San Antonio, Texas 

  Billah, Khondoker; Sharif, Hatim O.; Dessouky, Samer (2022-06-08)

  Traffic crashes are among the leading causes of injuries and fatalities worldwide. The main assumption of this study is that traffic crash rates, injury severity, and driving behaviors differ by the driver’s gender. ...

• Simulation and Modeling of Optical Properties of U, Th, Pb, and Co Nanoparticles of Interest to Nuclear Security Using Finite Element Analysis 

  Gharibshahi, Elham; Alamaniotis, Miltos (2022-05-17)

  In this work, the optical characteristics of uranium (U), lead (Pb), cobalt (Co), and thorium (Th) nanoparticles are fashioned and simulated employing the finite element analysis (FEA) approach concerning multiple particle ...

• Analysis and Development of a Small-Scale Supercritical Carbon Dioxide (sCO2) Brayton Cycle 

  Patel, Raj C.; Bass, Diego C.; Dukuze, Ganza Prince; Andrade, Angelina; Combs, Christopher S. (2022-05-13)

  Carbon dioxide’s (CO₂) ability to reach the supercritical phase (7.39 MPa and 304.15 K) with low thermal energy input is an advantageous feature in power generation design, allowing for the use of various ...

• Evaluation of Artificial Intelligence Methods to Estimate the Compressive Strength of Geopolymers 

  Zou, Yong; Zheng, Chao; Alzahrani, Abdullah Mossa; Ahmad, Waqas; Ahmad, Ayaz; Mohamed, Abdeliazim Mustafa; Khallaf, Rana; Elattar, Samia (2022-04-26)

  The depletion of natural resources and greenhouse gas emissions related to the manufacture and use of ordinary Portland cement (OPC) pose serious concerns to the environment and human life. The present research focuses on ...

• Advances in Technological Research for Online and In Situ Water Quality Monitoring—A Review 

  Silva, Gabriel Marinho e; Campos, Daiane Ferreira; Brasil, José Artur Teixeira; Tremblay, Marcel; Mendiondo, Eduardo Mario; Ghiglieno, Filippo (2022-04-22)

  Monitoring water quality is an essential tool for the control of pollutants and pathogens that can cause damage to the environment and human health. However, water quality analysis is usually performed in laboratory ...

• A Scientometric Analysis of Predicting Methods for Identifying the Environmental Risks Caused by Landslides 

  Zou, Yong; Zheng, Chao (2022-04-25)

  The effects of a landslide can represent a very big problem, including the death of people, damage to the land, environmental pollution and the loss of natural resources. Landslides are the most important medium for ...

• Physics of unsteady cylinder-induced shock-wave/transitional boundary-layer interactions 

  Murphree, Zachary R.; Combs, Christopher S.; Yu, Wesley M.; Dolling, David S.; Clemens, Noel T. (Journal of Fluid Mechanics;Volume 918, 2021-05-14)

  Given the current lack of experimental data for shock waves interacting with incoming transitional boundary layers, the goal of this study was to characterize the dynamics of such an interaction to better understand the ...

• In vitro effects of nutraceutical treatment on human osteoarthritic chondrocytes of females of different age and weight groups 

  Amr, Mahmoud; Mallah, Alia; Abusharkh, Haneen; Van Wie, Bernard; Gozen, Arda; Mendenhall, Juana; Idone, Vincent; Tingstad, Edwin; Abu-Lail, Nehal I. (Journal of Nutritional Science;Volume 10, 2021-09-24)

  The in vitro effects of four nutraceuticals, catechin hydrate, gallic acid, α-tocopherol and ascorbic acid, on the ability of human osteoarthritic chondrocytes of two female obese groups to form articular cartilage (AC) ...

• Assessment of Sea Level and Morphological Changes along the Eastern Coast of Bangladesh 

  Anwar, Md. Shibly; Rahman, Kalimur; Bhuiyan, Md Abul Ehsan; Saha, Rupayan (2022-04-11)

  Bangladesh is one of the climate risk-prone countries in South Asia facing tremendous challenges to combat sea-level rise and its associated coastal morphological changes. This study aimed to determine the interaction of ...

• Using Artificial Neural Network (ANN) for Short-Range Prediction of Cotton Yield in Data-Scarce Regions 

  Yildirim, Tugba; Moriasi, Daniel N.; Starks, Patrick J.; Chakraborty, Debaditya (2022-03-29)

  Short-range predictions of crop yield provide valuable insights for agricultural resource management and likely economic impacts associated with low yield. Such predictions are difficult to achieve in regions that lack ...

• Portable Medical Suction and Aspirator Devices: Are the Design and Performance Standards Relevant? 

  Peri, Saketh R.; Akhter, Forhad; De Lorenzo, Robert A.; Hood, R. Lyle (3/25/2022)

  Airway clearance refers to the clearing of any airway blockage caused due to foreign objects such as mud, gravel, and biomaterials such as blood, vomit, or teeth fragments using the technology of choice, portable suction ...

• An On-Device Learning System for Estimating Liquid Consumption from Consumer-Grade Water Bottles and Its Evaluation 

  Roy, Avirup; Dutta, Hrishikesh; Griffith, Henry; Biswas, Subir (3/25/2022)

  A lightweight on-device liquid consumption estimation system involving an energy-aware machine learning algorithm is developed in this work. This system consists of two separate on-device neural network models that carry ...

• What Is Engineering and Who Are Engineers? Student Reflections from a Sustainability-Focused Energy Course 

  Forbes, Marissa H.; Lord, Susan M.; Hoople, Gordon D.; Chen, Diana A.; Mejia, Joel Alejandro (3/16/2022)

  In the spring of 2021, the University of San Diego’s Department of Integrated Engineering taught the course, “Integrated Approach to Energy”, the second offering of a new required course, to nine second-year ...

• Bernstein Polynomial-Based Method for Solving Optimal Trajectory Generation Problems 

  Kielas-Jensen, Calvin; Cichella, Venanzio; Berry, Thomas; Kaminer, Isaac; Walton, Claire; Pascoal, Antonio (2/27/2022)

  This paper presents a method for the generation of trajectories for autonomous system operations. The proposed method is based on the use of Bernstein polynomial approximations to transcribe infinite dimensional optimization ...

• Sensitivity Analysis for Transient Thermal Problems Using the Complex-Variable Finite Element Method 

  Rincon-Tabares, Juan-Sebastian; Velasquez-Gonzalez, Juan C.; Ramirez-Tamayo, Daniel; Montoya, Arturo; Millwater, Harry; Restrepo, David (3/7/2022)

  Solving transient heat transfer equations is required to understand the evolution of temperature and heat flux. This physics is highly dependent on the materials and environmental conditions. If these factors change with ...

• Energy Harvesting Using a Stacked PZT Transducer for Self-Sustainable Remote Multi-Sensing and Data Logging System 

  Dipon, Wasim; Gamboa, Bryan; Guo, Ruyan; Bhalla, Amar (2/6/2022)

  The work discussed is developing a self-sustainable low-power remote multi-sensing and data logging system for traffic sensing. The system is powered by the energy harvested using a stacked PZT (Lead zirconate titanate) ...

• From Chondrocytes to Chondrons, Maintenance of Phenotype and Matrix Production in a Composite 3D Hydrogel Scaffold 

  Amr, Mahmoud; Mallah, Alia; Yasmeen, Samina; Van Wie, Bernard; Gozen, Arda; Mendenhall, Juana; Abu-Lail, Nehal I. (2/2/2022)

  Osteoarthritis (OA) is a degenerative disease characterized by articular cartilage (AC) degradation that affects more than 30 million people in the USA. OA is managed with symptom-alleviating medications. Matrix-assisted ...

• Geo-Locating and Identifying Wrong-Way Driving Entrance Points in Bexar County Highways by Implementing Mathematical Modeling and Land-Use Impact Assessment 

  Mia, Md Farman; Dessouky, Samer; Weissmann, Jose; Sharif, Hatim O.; Billah, Khondoker (12/21/2021)

  Wrong-way driving (WWD) leads to high severity crashes and is a major concern for transportation managers. This study aims to identify WWD entry points of urban highway ramps and develop an analysis methodology using basic ...

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