Come join Ling Zhang as he shares how his research is revolutionizing the way one-way car sharing networks work. Joining Ling is Lokesh Narayanan who explains how he is assessing 3D biofabrication processes.
Refreshments will be served in 428 Daniels Hall (Student Lounge) from 10:30am to 10:50am.
Dynamic Pricing in One-way Car Sharing Networks: A Distributional Fluid Approximation Approach
Balancing supply and demand across different areas is a critical issue in one-way car sharing networks. In this paper, we study dynamic pricing in order to maximize the profit of a car-sharing network. Since the stochastic network model is analytically intractable, we propose a fluid network model to represent the supply and demand of vehicles. In contrast to conventional fluid models that assume deterministic processing times, general rental time distributions are built into our fluid model. Moreover, it allows for time-varying demand rates and rental time distributions. Under this formulation, dynamic pricing is reduced to a convex optimization problem that is efficiently solvable.
Non-destructive Real-time Quality Assessment of 3D-Biofabricated Constructs using Dielectric Impedance Spectroscopy
In 3D biofabrication, assessing critical quality attributes of constructs (e.g., viable cell number, cell distribution) is critical to determining the performance of the process. One major limitation in current state-of-the-art is the lack of appropriate methods to monitor these attributes in a non-destructive chemical-free manner. We are investigating dielectric impedance spectroscopy to address this gap. In this study, we assessed and demonstrated the differences in relative permittivity of 3D alginate constructs with four different osteosarcoma cell concentrations (1 – 6.5 million cells/mL). The βdispersion parameters for cell-encapsulated alginate were also
characterized. Owing to the measurement efficiency and nondestructive mode of testing, this method has significant potential as an in-process quality control tool for 3D biofabrication processes.