Abstract: Systems and methods for providing a head-up display using a holographic element formed on a visor of a wearable element (e.g., a helmet) are disclosed. Light projectors along with corresponding optics are positioned on both sides of a user's head within the wearable element. Light from a light projector is directed towards the holographic element to reflect towards the eye on the opposite side of the head from the light projector. With light reflecting from both light projectors, images are perceived by the user is being positioned on a virtual screen where the virtual screen is positioned outside the wearable element. Images on the virtual screen are displayed stereoscopically and with a large field of view for the user.

Abstract: A photobioreactor apparatus is described. The photobioreactor provides a system for growth of biological organisms such as algae. The photobioreactor system includes a plurality of transparent conduits coupled between two manifolds. Fluid and feedstock are flowed through the conduits and light is provided at a growth wavelength for growth of biological organisms in the conduits. The manifolds may include passages that allow the fluid and feedstock to flow linearly through the conduits (e.g., from one conduit to the next). The linear or series flow of the fluid and feedstock through the plurality of conduits provides an efficient and cost-effective approach for growth of biological organisms.

Abstract: Systems and methods for cleaning a photobioreactor apparatus are described. Cleaning devices are described that include flexible members coupled to a propulsion member. The cleaning devices may be moved through tubes of the photobioreactor apparatus using the propulsion member. As the cleaning devices move, the flexible members may make contact with walls of the tubes, thereby cleaning the walls of the tubes. Cleaning devices are also contemplated that include particles with some rigidity that intermix with the fluid inside the tubes and clean the walls of the tubes as the particles contact the walls.

Abstract: Systems and methods for providing an active display of a user's environment on a wearable element (e.g., a helmet) are disclosed. Displaying an active display may include displaying a head-up-display on a display screen on the wearable element that is positioned to cover the field of view of the user when the user wears the wearable element. The head-up display may include a display generated from images (e.g., video) captured by one or more image capture elements (e.g., cameras) coupled to the wearable element. In certain instances, the head-up-display replaces the field of view of the user while the wearable element is worn by the user. The head-up-display may also display data received from one or more sensors coupled to the wearable element and data received from another data source in wireless communication with the wearable element.

Abstract: Systems and methods for verifying physical measurements taken for bioreactors are disclosed. Physical measurements may be taken using one or more sensors coupled to a bioreactor. The sensors may measure properties of the bioreactor or properties of materials within the bioreactor. Verifying the physical measurements may be implemented to enable proof of physical work being completed by the bioreactor.

Abstract: Provided is a sensor operative to track changes in a liquid level of a hand-held liquid container, the sensor comprising: an ultrasonic liquid-level sensor configured to indicate a liquid level of a liquid in a hand-held liquid container, wherein the ultrasonic liquid-level sensor is capable of indicating the liquid level when the surface of the liquid is less than 20 centimeters away from the ultrasonic liquid-level sensor; a radio transmitter; and a processor configured to draw power from a portable power source, receive liquid-level indications from the ultrasonic liquid-level sensor, and cause the radio transmitter to transmit data indicative of changes in the liquid level.

Abstract: Provided is a sensor operative to track changes in a liquid level of a hand-held liquid container, the sensor comprising: an ultrasonic liquid-level sensor configured to indicate a liquid level of a liquid in a hand-held liquid container, wherein the ultrasonic liquid-level sensor is capable of indicating the liquid level when the surface of the liquid is less than 20 centimeters away from the ultrasonic liquid-level sensor; a radio transmitter; and a processor configured to draw power from a portable power source, receive liquid-level indications from the ultrasonic liquid-level sensor, and cause the radio transmitter to transmit data indicative of changes in the liquid level.

Abstract: Provided is a sensor operative to track changes in a liquid level of a hand-held liquid container, the sensor comprising: an ultrasonic liquid-level sensor configured to indicate a liquid level of a liquid in a hand-held liquid container, wherein the ultrasonic liquid-level sensor is capable of indicating the liquid level when the surface of the liquid is less than 20 centimeters away from the ultrasonic liquid-level sensor; a radio transmitter; and a processor configured to draw power from a portable power source, receive liquid-level indications from the ultrasonic liquid-level sensor, and cause the radio transmitter to transmit data indicative of changes in the liquid level.

Abstract: Provided is a sensor operative to track changes in a liquid level of a hand-held liquid container, the sensor comprising: an ultrasonic liquid-level sensor configured to indicate a liquid level of a liquid in a hand-held liquid container, wherein the ultrasonic liquid-level sensor is capable of indicating the liquid level when the surface of the liquid is less than 20 centimeters away from the ultrasonic liquid-level sensor; a radio transmitter; and a processor configured to draw power from a portable power source, receive liquid-level indications from the ultrasonic liquid-level sensor, and cause the radio transmitter to transmit data indicative of changes in the liquid level.