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Massive MIMO has the potential to support demands of next generation networks and emerging applications such as V2V/V2X communication and augmented reality. ● Millimeter-Wave (mmWave) frequencies allow for larger bandwidth as well as compact form factor of antenna arrays with many elements. ● The COSMOS testbed has deployed indoor and outdoor 28GHz phased array antenna modules (PAAMs) to support experimentation with these emerging technologies. ● Mobile PAAMs have been developed to enable experimentation anywhere and with mobility.more » « lessFree, publicly-accessible full text available November 18, 2025
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Free, publicly-accessible full text available July 10, 2025
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Free, publicly-accessible full text available May 10, 2025
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Evacuation planning is a crucial part of disaster management. However, joint optimization of its two essential components, routing and scheduling, with objectives such as minimizing average evacuation time or evacuation completion time, is a computationally hard problem. To approach it, we present MIP-LNS, a scalable optimization method that utilizes heuristic search with mathematical optimization and can optimize a variety of objective functions. We also present the method MIPLNS-SIM, where we combine agent-based simulation with MIP-LNS to estimate delays due to congestion, as well as, find optimized plans considering such delays. We use Harris County in Houston, Texas, as our study area. We show that, within a given time limit, MIP-LNS finds better solutions than existing methods in terms of three different metrics. However, when congestion dependent delay is considered, MIP-LNS-SIM outperforms MIP-LNS in multiple performance metrics. In addition, MIP-LNS-SIM has a significantly lower percent error in estimated evacuation completion time compared to MIP-LNS.more » « less
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Many studies show that college engineering students’ sense of ethical and social responsibility declines over the course of their college careers (Cech, 2014; Canny & Bielefeldt, 2015; Schiff et al., 2021). One reason is that many college engineering programs and courses reinforce the social-technical dualism, which treats social and macro-ethical issues as distinct from the technical work more often associated with “real” engineering. Some programs, like the Science, Technology and Society (STS) program at [institution made confidential for review], attempt to challenge this dualism by supporting the integration of social and technical considerations within students’ design work and by asking students to grapple with the complex ethics of their work. However, this program is still embedded within a department, university, and society that subscribes to harmful ideologies such as technocracy, capitalism, and meritocracy, which value efficiency, surveillance, and control. These ideologies and their associated values constrain the imagination for what is possible in design work, for instance, by relying on technological ‘quick fixes’ to address complex social problems or by propping up large corporations as innovators, without adequately grappling with the harm that these corporations might be doing. This cultural reality creates an uphill battle for educators attempting to support engineering students’ sense of social consciousness and ethical responsibility. Thus, this study attempts to understand how engineering students’ imaginations are being constrained by societal structures and ideologies and when do they “break free” from these constraints? In this paper, we present a preliminary analysis of first-year STS students collaboratively reasoning through a simulated design scenario about a small community store facing challenges related to the Covid-19 pandemic (adapted from Gupta, 2017). Using discourse and narrative analysis, we analyzed multiple focus group interviews to identify what we call “co-occurrences,” or ideas that tend to hang together in participants’ reasoning. Examining these co-occurrences provides insight into the variety of ways socio-technical imaginaries play out in students’ design thinking.more » « less