Goodman Research Group (United States)

Abstract Flow induced vibration (FIV) can go undetected in subsea pipework, potentially leading to fatigue failures. Although FIV screening methods have been developed and improved over recent years [1], these are deliberately conservative for multiphase pipe flows and do not accurately quantify the actual fatigue performance of subsea pipework already in situ. The last few years has seen significant development of reliable simulation processes to predict the effects of multiphase flow induced vibration and they have been successfully compared with experimental data for a wide range of operating conditions. However, there is limited in-situ vibration measurement data available from actual operating subsea equipment which would allow a direct verification of the analytical / numerical results. As part of a routine ROV inspection, two spools on an inservice subsea riser tower were observed to be vibrating, and a combined simulation and measurement campaign was engaged upon to quantify the risk of fatigue failure. This paper is focused on the measurement campaign. Based on initial modal Finite Element Analysis, suitable locations were selected for placement of subsea accelerometers. The extracted and processed data, covering almost 2 months of operations, highlighted that the stresses based on the measured vibration were within 35% of the simulation results, and it also showed an unexpected behaviour where the 2 risers interacted with each other; although this was unlikely to cause significant damage. Subsequently mitigations could be evaluated and implemented with confidence utilising a reasonably large safety margin.

People living with dementia can become vulnerable when experiencing symptoms such as memory loss and disorientation, as well as stigma attached to the condition. The care of people with dementia is fraught with ethical dilemmas and challenges regarding how nurses should respond to situations that put patients at risk of distress. For example, if a person with dementia asks to see a deceased relative, a nurse may have to decide whether to tell the truth, or a 'white lie' to avoid distress. This article examines the debates around the use of such 'therapeutic lying' when caring for people with dementia and provides guidance on how nurses could use this technique while protecting the individual's best interests.

Abstract The number of African American females participating in cyber fields is significantly low. To increase African American female participation in cybersecurity, STEM education requires a new approach to student engagement. The most common approach to engaging more African American females in STEM is to provide students access to professional images or role models active in STEM; however, this is not enough. More race-centered strategies beyond role-modeling are needed to attract and retain African American females in STEM. Research studies show that integrating personal experiences and making cultural connections can help improve student participation in STEM from underrepresented populations. In this work, culturally responsive teaching strategies (CRT) are used to engage African American female middle school participants in a summer program. In 2021, faculty in the Center for Cybersecurity Assurance and Policy (CAP) at Morgan State University (MSU) developed and implemented the GenCyber 'Females are Cyber Stars' (FACS) Summer Camp. This initiative targeted female African American students in Baltimore Public Middle Schools. A total of 39 girls participated in the virtual program during the summer of 2021, and 25 girls engaged in the in-person program during the summer of 2022. The goals of the program were to increase female students' interest in cybersecurity and provide exposure to the fundamentals of cybersecurity, exploitation of hardware and software vulnerabilities, and security of IoT (Internet of Things) devices in a smart home environment. The FACS Summer Camp Program incorporated culturally responsive strategies to engage the participants in an inclusive and interactive setting. Incorporating culturally responsive strategies empowers students intellectually, socially, and emotionally by using cultural references to teach academic skills. When using this approach, instructional materials should include information relevant to the students' background, customs, and experiences and challenge students to think critically. Participants were given pre- and post-program surveys to assess learning outcomes and examine the impact of using CRT. The results showed that the girls reported an increase in their knowledge and a gain in interest about cybersecurity and computing. This paper discusses the summer program and curriculum, culturally-responsive teaching strategies deployed, student learning outcomes, and perceptions of cultural responsiveness assessed in the Females are Cyber Stars summer programs.

This paper shall discuss the results of progress made towards the manufacturing of Large Space Optics and Lasercom Telescopes conducted on two highly competed NASA Phase II projects. Mirror substrates were made using patent pending nanoceramic composite Silicon Carbide (SiC) materials via novel processes. NASA Phase II Contract #80NSSC18C0077 addressed the design and manufacturing of a 25-cm Pathfinder mirror substrate traceable SiC scalable to meter-class segments for a far-infrared surveyor (the Origins Space Telescope, OST). The technology also is intended to fill priority technology gaps for the LUVOIR Surveyor, and Habitable Exoplanet Observatory (HabEx). The second SBIR, NASA Phase II Contract # 80NSSC19C0138, addresses the manufacturing of an ultra-lightweight, ultrastable RoboSiC™ lasercom telescope. Laser Communications Telescopes are needed by multiple Jet Propulsion Laboratory and multiple NASA cost centers for Cislunar, Earth-Sun-L1 and L2, Deep-space and for Planetary Missions with Orbiter-Landers.

Two kinds of Bovine Serum Albumin (BSA)-loaded microspheres were prepared in water-organic bilayer systems using ultrasonic irradiation. The first method included an aqueous solution of BSA and water-soluble dye together, mixed with dodecane, that upon sonication formed a matrix system where the dye is concentrated in the protein shell. The other system included an aqueous solution of BSA mixed with octanol-soluble dye that, upon sonication, formed a reservoir system in which the dye filled the inner volume of the microspheres. Each of these microspheres was prepared with two different dyes and their leaching profiles into pure solvents were studied using UV-vis spectrometry. Fast leaching was observed at the beginning for both systems, which levelled-off after a certain time. For the matrix system, an equilibrium state was obtained after 100-200 hours, whereas for the reservoir system, leaching occurred much faster, within 1-3 hours. Such systems can serve as models for drug delivery agents.