Abstract: Methods, apparatuses, and kits for detection of substances in water by forming a complex with an indicator reagent and filtering the complex on a filter or membrane are described. The concentrated indicator on the filter, membrane or other capture device provides a colorimetric readout that can determine the amount of substance present in a water sample. A computer-implemented method for determining the concentration of substances in water based on color data from the colorimetric readout is also described.

Abstract: A fishing rod holder includes a tubular member capable of removably holding a fishing rod thereon. The tubular member includes a first annular wall enclosing a longitudinally extending first cavity portion and a second annular wall enclosing a longitudinally extending second cavity portion. The second annular wall includes an internally-threaded end portion at one end. The fishing rod holder also includes a spike detachably affixable to the tubular member. The spike has a stored configuration and a deployed configuration. At least a portion of the spike is disposed in the second cavity portion when in the stored configuration.

Abstract: The present disclosure is directed to a pedal assembly that includes a pedal arm configured to move based on a load applied thereon and a housing that includes a first housing member having a first cavity and a pushrod operably connected to the pedal arm and to the first housing member. A first cradle positioned within the first cavity. The first cradle includes a second cavity. A first pair of springs positioned to extend within the second cavity. A second housing member having a third cavity. A second pair of springs positioned to extend within the second cavity and the third cavity. When a first predetermined load is applied to the pedal arm, the pushrod moves which drives the first cradle against the first pair of springs such that at least a compression energy by the first pair of springs generates a first force feedback onto the pedal arm.