Collaborations

Tom Rolander has regular collaborations with members of the Hopkins community. Here we share some of their output.

4 Port PID Controller

Proportional–Integral–Derivative: This PID controller continuously calculates an error value as the difference between a desired setpoint temperature and the measured temperature and applies a correction based on proportional, integral, and derivative terms. Corrections are applied by turning on/off solid state relays controlling 120V heater/cooler receptacles.

Application: Brendan Cornwell, Katrina Armstrong, Nia S Walker, Marilla Lippert, Victor Nestor, Yimnang Golbuu, Stephen R Palumbi (2021) Widespread variation in heat tolerance and symbiont load are associated with growth tradeoffs in the coral Acropora hyacinthus in Palau, eLife 10:e64790
Collaborator: Brendan Cornwell (Palumbi Lab)

Arduino Shell Crusher Recorder

Arduino microcontroller for tracking mussel shell fatigue

Application: R. L. Crane, M. W. Denny; Mechanical fatigue fractures bivalve shells. J Exp Biol 15 May 2020; 223 (10): jeb220277. doi: https://doi.org/10.1242/jeb.220277
Collaborator: Rachel Crane (Denny Lab)

Mussel Heat Stress Server

Data Server + API : Thermocouples measure internal temperature of mussles and relay data to the web.

Application: Nicole E. Moyen, George N. Somero, Mark W. Denny; Effects of heat acclimation on cardiac function in the intertidal mussel Mytilus californianus: can laboratory-based indices predict survival in the field?. J Exp Biol 1 May 2022; 225 (9): jeb243050. doi: https://doi.org/10.1242/jeb.243050
Collaborator: Nicole Moyen (Denny Lab)

Mount for time-lapse photos of tunicates

A height-adjustable platform for taking time-lapse images of tunicates via an iPhone. Tom designed the whole rig, including the platform for holding slides submerged just below the water (in black).

Tide Cycle Timer

Arduino microcontroller based