Abstract: A method of determining a three-dimensional motion of a movable ultrasound probe (10) is described. The method is carried out during acquisition of an ultrasound image of a volume portion (2) by the ultrasound probe. The method comprises receiving a stream of ultrasound image data (20) from the ultrasound probe (10) while the ultrasound probe is moved along the volume portion (2); inputting at least a sub-set of the ultrasound image data (20, 40) representing a plurality of ultrasound image frames (22) into a machine-learning module (50), wherein the machine learning module (50) has been trained to determine the relative three-dimensional motion between ultrasound image frames (22); and determining, by the machine-learning module (50), a three-dimensional motion indicator (60) indicating the relative three-dimensional motion between the ultrasound image frames.

Abstract: A method of determining a three-dimensional motion of a movable ultrasound probe (10) is described. The method is carried out during acquisition of an ultrasound image of a volume portion (2) by the ultrasound probe. The method comprises receiving a stream of ultrasound image data (20) from the ultrasound probe (10) while the ultrasound probe is moved along the volume portion (2); inputting at least a sub-set of the ultrasound image data (20, 40) representing a plurality of ultrasound image frames (22) into a machine-learning module (50), wherein the machine learning module (50) has been trained to determine the relative three-dimensional motion between ultrasound image frames (22); and determining, by the machine-learning module (50), a three-dimensional motion indicator (60) indicating the relative three-dimensional motion between the ultrasound image frames.

Abstract: A motorless reactor may include a base member, a tubular container, an inlet and an outlet, a pipe, and a head member. The tubular container may define a longitudinal axis extending between an upper end and a lower end, the lower end of the tubular container being coupled to the base member. The inlet and the outlet may be disposed proximate the upper end of the tubular container. The inlet may be configured to receive a pressurized flow of water from a reservoir, and the outlet may be configured to output a mixture of water and a predetermined substance. The pipe may be coupled to the inlet and may extend substantially parallel to the longitudinal axis from a first end proximate the upper end of the tubular container toward a second end proximate the base member.

Abstract: A multipurpose pipetting device may include a pump, a flexible hose, at least one substantially rigid tube, a removable pipette tip, and a valve element. The hose has a first end coupled to the pump and a second end coupled to a first end of the at least one substantially rigid tube. The pipette tip is removably coupled to the second end of the at least one substantially rigid tube. The valve element may be disposed proximate the second end of the at least one substantially rigid tube and arranged to prevent liquid backflow from the pipette tip into the substantially rigid pipe. Methods of using the device include feeding or applying a solution to an aquatic plant or animal, to a non-aquatic plant or animal, removing materials and substances from an aquarium bed, and/or applying an adhesive to affix an item, plant, or sessile invertebrate to a surface.

Abstract: A magnetically coupled device for an aquarium wall. The device may include an inner member and an outer member. The inner member may include a main body portion and an inner magnetic or magnetically attractable element coupled to or disposed within the main body portion. The outer member may include an outer magnetic or magnetically attractable element and a polymer static cling layer. The outer magnetic or magnetically attractable element may be magnetically attracted to the inner magnetic or magnetically attractable element. The polymer static cling layer may be configured to allow the outer member to be removably attached to an outer surface of the aquarium wall. The inner member may be removably attached to an inner surface of the aquarium wall by magnetic attraction with the outer member. The device may provide, for example, a feeding point for aquatic life contained in the aquarium.

Abstract: A motorless reactor may include a base member, a tubular container, an inlet and an outlet, a pipe, and a head member. The tubular container may define a longitudinal axis extending between an upper end and a lower end, the lower end of the tubular container being coupled to the base member. The inlet and the outlet may be disposed proximate the upper end of the tubular container. The inlet may be configured to receive a pressurized flow of water from a reservoir, and the outlet may be configured to output a mixture of water and a predetermined substance. The pipe may be coupled to the inlet and may extend substantially parallel to the longitudinal axis from a first end proximate the upper end of the tubular container toward a second end proximate the base member.

Abstract: An aquarium wall cleaning device is provided. The device may include a first magnetic or magnetically attractable member including a first flexible main body and a first layer attached to the main body and having an abrasive surface, wherein the first member is configured to conform to a curved inner surface of the aquarium wall during use. A second magnetic or magnetically attractable member may be provided which includes a second main body. When the first member and the second member are placed on opposite sides of an aquarium wall and are coupled magnetically to one another, the abrasive surface contacts the inner surface of the aquarium wall to allow cleaning of the wall.

Abstract: An aquarium wall cleaning device and a method for manufacturing the same are provided. The device may include a first flexible member including a main body formed from a flexible buoyant material, a first magnetic or magnetically attractable element disposed within the main body of the first flexible member, and a first layer attached to the main body of first flexible member and having an abrasive surface. The first flexible member may be substantially neutrally buoyant or negatively buoyant in water. The device may also include a second member including a main body, a second magnetic or magnetically attractable element disposed within the main body of the second member, and a second layer having a soft surface attached to the main body of the second member. At least one of the first and second magnetic or magnetically attractable elements may include a magnetic material. The other of the first and second elements may be magnetically attracted to the magnetic material.

Abstract: A hydrometer, hydrometer kit, and method of measuring the salinity/density or the salinity/specific gravity of a liquid are provided. The hydrometer may include a box structure comprising side walls and a bottom. At least a portion of one of the side walls may be substantially transparent. A buoyant indicator member may be pivotably disposed about an axis within the box structure. The indicator member may pivot about the axis when the box structure is filled with a liquid. A salinity/density scale or salinity/specific gravity scale may be disposed on a surface of the box structure or a dial member. At least one adhesive member may be removably adhered to the indicator member by a user so that the hydrometer can be calibrated based on a reference solution having a predetermined salinity. The at least one adhesive member may increase or decrease the buoyancy of the indicator member. The kit may include the hydrometer and a container of the reference solution having a predetermined salinity.

Abstract: A tube cleaning device is provided including a first member and a second member. The first member includes a first magnetic or magnetically attractable element and an abrasive cleaning surface. The second member includes a second magnetic or magnetically attractable element magnetically attracted to or by the first magnetic or magnetically attractable element. When the first member is inserted within a tube and the second member is positioned adjacent an outer wall of the tube, the abrasive surface of the first member contacts an inner wall of the tube. By moving the second member along and/or around the outer wall of the tube, the abrasive surface cleans the inner wall of the tube.

Abstract: A magnetically coupled device for an aquarium wall. The device may include an inner member and an outer member. The inner member may include a main body portion and an inner magnetic or magnetically attractable element coupled to or disposed within the main body portion. The outer member may include an outer magnetic or magnetically attractable element and a polymer static cling layer. The outer magnetic or magnetically attractable element may be magnetically attracted to the inner magnetic or magnetically attractable element. The polymer static cling layer may be configured to allow the outer member to be removably attached to an outer surface of the aquarium wall. The inner member may be removably attached to an inner surface of the aquarium wall by magnetic attraction with the outer member. The device may provide, for example, a feeding point for aquatic life contained in the aquarium.

Abstract: A hydrometer, hydrometer kit, and method of measuring the salinity/density or the salinity/specific gravity of a liquid are provided. The hydrometer may include a box structure comprising side walls and a bottom. At least a portion of one of the side walls may be substantially transparent. A buoyant indicator member may be pivotably disposed about an axis within the box structure. The indicator member may pivot about the axis when the box structure is filled with a liquid. A salinity/density scale or salinity/specific gravity scale may be disposed on a surface of the box structure or a dial member. At least one adhesive member may be removably adhered to the indicator member by a user so that the hydrometer can be calibrated based on a reference solution having a predetermined salinity. The at least one adhesive member may increase or decrease the buoyancy of the indicator member. The kit may include the hydrometer and a container of the reference solution having a predetermined salinity.

Abstract: An aquarium wall cleaning device and a method for manufacturing the same are provided. The device may include a first flexible member including a main body formed from a flexible buoyant material, a first magnetic or magnetically attractable element disposed within the main body of the first flexible member, and a first layer attached to the main body of first flexible member and having an abrasive surface. The first flexible member may be substantially neutrally buoyant or negatively buoyant in water. The device may also include a second member including a main body, a second magnetic or magnetically attractable element disposed within the main body of the second member, and a second layer having a soft surface attached to the main body of the second member. At least one of the first and second magnetic or magnetically attractable elements may include a magnetic material. The other of the first and second elements may be magnetically attracted to the magnetic material.