Abstract: A system for repositioning teeth a patient from an initial tooth arrangement to a final tooth arrangement includes a plurality of incremental position adjustment appliances, each having an arrangement of cavities shaped to receive and reposition teeth of the patient. The cavities in at least one appliance in the system have a different geometry than that of at least one other appliance in the system. At least some of the appliances in the system are successively worn by the patient to exert force on at least one tooth and move the teeth of the patient from a first arrangement to a successive arrangement different from the first arrangement. The system includes a first multilayer shell with a bending stiffness factor less than about 0.1 GPa*mm3 and an elastic modulus no greater than about 1.5 GPa; and a second shell with a bending stiffness factor greater than 0.1 GPa*mm3.

Abstract: A system and method for determining a safe return to a vehicle that include determining at least one safety feature that is associated to a travel plan that pertains to a user safely returning to the vehicle from a designated location. The system and method also include analyzing sensor data and user input data and determining if there is at least one of: a deviation from the travel plan, an existence of at least one probable safety threat that affects the user, and an existence of at least one emergency that affects the user. The system and method further include sending at least one emergency alert based on the at least one safety feature.

Abstract: A system and method for determining a safe return to a vehicle that include determining at least one safety feature that is associated to a travel plan that pertains to a user safely returning to the vehicle from a designated location. The system and method also include analyzing sensor data and user input data and determining if there is at least one of: a deviation from the travel plan, an existence of at least one probable safety threat that affects the user, and an existence of at least one emergency that affects the user. The system and method further include sending at least one emergency alert based on the at least one safety feature.

Abstract: A filter element for filtering a particle-containing paint composition or a particle loading slurry composition which is a precursor to a particle-containing paint composition is provided. The filtration element comprises at least one filtration layer formed from woven polymer fibers and having substantially uniform pores and two spacer layers. The spacer layers have raised projections to create a space between adjacent spacer layers having contacting projections. The filtration element has a pleated or spirally wound configuration.

Abstract: A filter element for filtering a particle-containing paint composition or a particle loading slurry composition which is a precursor to a particle-containing paint composition is provided. The filtration element comprises at least one filtration layer formed from woven polymer fibers and having substantially uniform pores and two spacer layers. The spacer layers have raised projections to create a space between adjacent spacer layers having contacting projections. The filtration element has a pleated or spirally wound configuration.

Abstract: Porous polymeric structures are formed from a polymeric sheet by sequential contact of the sheet with a solvent for the sheet and then a non-solvent for the sheet. All or a portion of each non-porous sheet surface is masked to prevent a portion of a surface of the sheet from contacting the solvent. The structure can be porous through all or a portion of its thickness.

Abstract: A sight for aiming a spotlight on a particular target, such as a performer on stage, has a partially reflective panel supported on the spotlight in an inclined position through which the operator can see the target, and sight also includes a light source which, by means of a mirror, is reflected onto the panel.

Abstract: A small, self-contained portable back-hoe has a wheeled frame with a towing tongue for over-the-road trailering. Pivoted outriggers are connected to the back and a third support is secured to the front of the frame. Cylinder units are coupled to position the supports for digging and in raised position for trailering. The bucket and articulated boom assembly is affixed to the frame with a vertical pivot and includes cylinder units for digging operation thereof. An operator station and a hydraulic power supply source or system is secured to the front of the frame. A special hydraulic supply is integrated into the front framework. The back-hoe boom assembly and operating assembly are balanced about the single axle for convenient positioning. The bucket assembly and three-point support are arranged to minimize the tipping of the frame as a result of the digging forces. A gasoline driven high efficiency industrial-type pump is connected to the cylinder units with a filter and the suction side.

Abstract: A filter unit formed by spirally winding a multi-layer material around a core to form a generally cylindrical construction having two opposing spiral end surfaces. The multilayer material has at least two filter layers and at least two spacer layers formed from a material with a high void volume. The multi-layer material need not include a fluid-impermeable layer. The layers are arranged and adhered along the lengthwise and widthwise edges so that, in use, unfiltered fluid passing through one spiral surface of the filter unit into one spacer layer must pass through a filter layer prior to passing out of the construction through the opposing spiral end surface.