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Thermodynamic Analysis of Cascade Vacuum Pump Based Membrane Dehumidifier in Air Conditioning System
Get PDFNormalization with Dynamic Weights Predicts Neural and Behavioral Effects of Orientation Adaptation
Get PDFProlonged exposure to an oriented contour causes adaptation and has nontrivial effects on neural activity and perception. For example, the neuron\u27s response amplitude may change (suppression or facilitation), the width of its tuning curve may change (broadening or sharpening), and its preferred orientation may shift (repulsion or attraction). Perceptually, adaptation affects the perceived orientation of a subsequently presented contour (direct and indirect tilt aftereffect) and alters orientation discrimination thresholds. In this study, I show that the normalization model with dynamic weights can predict these empirical results
Optimal AoI for Systems With Queueing Delay in Both Forward and Backward Directions
Get PDFAge-Of-Information (AoI) is a metric that focuses directly on the application-layer objectives, and a canonical AoI minimization problem is the update-through-queues models. Existing results in this direction fall into two categories: The open-loop setting for which the sender is oblivious of the packet departure time, versus the closed-loop setting for which the decision is based on instantaneous Acknowledgment (ACK). Neither setting perfectly reflects modern networked systems, which almost always rely on feedback that experiences some delay. Motivated by this observation, this work subjects the ACK traffic to a second queue so that the closed-loop decision is made based on delayed feedback. Near-optimal schedulers have been devised, which smoothly transition from the instantaneous-ACK to the open-loop schemes depending on how long the feedback delay is. The results quantify the benefits of delayed feedback for AoI minimization in the update-through-queues systems
“Oh, That’s Engineering?”: Complicating Black Women Educators’ Understanding of Engineering Practices in Urban Elementary Schools
Get PDFIn most teacher preparation programs, a focus on standards and curricula with STEM concepts, specifically engineering, are largely missing from the teacher licensure requirements. There have been few opportunities for teacher educators to teach, learn, and reflect on the nuanced complexities of STEM, specifically engineering concepts and practices in urban elementary schools. This university-school- community partnership, led by Black women, focused on the early exploration of STEM with high-ability/ gifted Black girls, caregivers, and their Black women educators. In this qualitative study, Black women teachers were able to disrupt assumptions and stereotypes of STEM, particularly in engineering, and identify challenges of associating STEM perspectives to their everyday experiences and teaching with elementary school students. This essay explores and problematizes their assumptions, values, and utilization of engineering praxis for Black girls, their teachers, and their communities
Transforming Chinese Language Learning through Community Engagement: A Mixed-Methods Study of Service-Learning
Get PDFThis mixed-methods study investigates the impact of service-learning on students enrolled in an advanced Chinese language course, focusing on their perceptions and outcomes related to academic performance, personal development, and civic engagement. The research also explores the common characteristics of students who voluntarily participate in service-learning activities and identifies factors that contribute to successful service-learning implementation in a Chinese language program. The findings reveal statistically significant improvements in students\u27 community engagement and cultural competence after participating in service-learning, as measured by the Public Affairs Scale (PAS). Qualitative analysis of students\u27 reflections and the researcher\u27s observations yielded three main themes: personal and interpersonal growth, academic enhancement, and meaningful civic learning. The study also highlights some differences in service-learning experiences based on gender and race. This research provides empirical evidence for the positive impact of service-learning in Chinese as a Second Language (CSL) contexts and offers insights into the design and implementation of effective service-learning programs. The study concludes with recommendations for future research directions in service-learning and Chinese language education
Review: Unsettling Archival Research: Engaging Critical, Communal, and Digital Archives
Get PDFReview of Unsettling Archival Research: Engaging Critical, Communal, and Digital Archives, edited by Gesa E Kirsch, Romeo García, Caitlin Burns Allen and Walker P. Smith