129 results about "Surface force" patented technology

Methods of utilizing magnetic particles or beads (MBs) in droplet-based (or digital) microfluidics are disclosed. The methods may be used in enrichment or separation processes. A first method employs the droplet meniscus to assist in the magnetic collection and positioning of MBs during droplet microfluidic operations. The sweeping movement of the meniscus lifts the MBs off the solid surface and frees them from various surface forces acting on the MBs. A second method uses chemical additives to reduce the adhesion of MBs to surfaces. Both methods allow the MBs on a solid surface to be effectively moved by magnetic force. Droplets may be driven by various methods or techniques including, for example, electrowetting, electrostatic, electromechanical, electrophoretic, dielectrophoretic, electroosmotic, thermocapillary, surface acoustic, and pressure.

The invention concerns a connector (110). The connector includes at least one tunnel (124) having a first portion (126) and a second portion (128) and at least one pin (120). At least a portion of the pin is positioned within the tunnel. The first portion of the tunnel has a first inner surface (140). The first inner surface forces at least a portion of the pin in at least a first predetermined direction as the connector engages a corresponding connector (112). Contaminants are at least partially removed from at least one of the pin and the corresponding connector as the first inner surface forces the pin in the first predetermined direction.

A display device includes: a pixel array including a plurality of pixels; a plurality of infrared (IR) emitters to emit IR light towards a surface of the display device; a plurality of IR detectors to detect IR light; a deformable layer on the pixels, on the IR emitters, on the IR detectors, and at the surface of the display device; and a plurality of tracers at the deformable layer to reflect the IR light emitted by the IR emitters towards the IR detectors and to, while a shear force is being applied at a point of contact at the surface of the display device, shift ones of the tracers around the point of contact in a direction of the shear force such that IR reflectance at the surface of the display device is changed.

Asymmetrical structures and methods are used to adjust the orientation of a microlens for a pixel array. The asymmetrical structures affect volume and surface force parameters during microlens formation. Exemplary microlens structures include an asymmetrical microlens frame, base, material or a combination thereof to affect the focal characteristics of the microlens. The asymmetrical frame alters the microlens flow resulting from the heating of the microlens during fabrication such that orientation of the microlens relative to an axis of the imager can be controlled.

The invention concerns a connector (110). The connector includes at least one tunnel (124) having a first portion (126) and a second portion (128) and at least one pin (120). At least a portion of the pin is positioned within the tunnel. The first portion of the tunnel has a first inner surface (140). The first inner surface forces at least a portion of the pin in at least a first predetermined direction as the connector engages a corresponding connector (112). Contaminants are at least partially removed from at least one of the pin and the corresponding connector as the first inner surface forces the pin in the first predetermined direction.

The invention discloses a high-reliability method for rapidly forecasting a rolling dynamic derivative of an aircraft. The high-reliability method includes the steps of generation of model surface grids and division of spatial grids, calculation of aerodynamic parameters under a rotating coordination system, and difference calculation of the rolling dynamic derivative. A calculation method for the aerodynamic parameters under the rotating coordination system includes (1), transforming a Navier-Stokes equation under an inertial system to the rotating coordinate system; (2), performing numerical solution on the transformed equation to acquire a flow field of each state; (3), acquiring aerodynamic force through surface integration of object-plane pressure and viscous stress, taking moment from the center of mass through surface force and integrating to acquire aerodynamic moment acting on the center of mass. The difference calculation includes calculating the aerodynamic force and the aerodynamic moment of a model at two different revolving speeds, and acquiring the rolling dynamic derivative of the model by a difference method. The method is high in reliability of calculation results, has a much smaller calculated amount as compared with a non-steady forced vibration method which is time-consuming for accurate solution, and can quickly forecast the rolling dynamic derivative of the aircraft in a highly reliable manner.

This invention relates to particulate and / or liquid droplet separation processes from liquids containing the same and the use of specific chemical additives to control surface wetting, hydrophobicity and surface forces in such processes.

An apparatus for engaging an electrical conductor comprises a gripping contact having a plurality of fingers, where the plurality of fingers has a substantially conical outer surface. A contact receptacle has a substantially conical inner surface. A tension member urges the gripping contact toward the contact receptacle such that interaction between the substantially conical outer surface and the substantially conical inner surface forces the plurality of fingers to engagingly compress the electrical conductor placed between the fingers. A method of engaging an electrical conductor comprises inserting an electrical conductor between a plurality of fingers of a gripping contact, where the plurality of fingers has a substantially conical outer surface. The substantially conical outer surface of the gripping contact is urged to interact with a substantially conical inner surface of a contact receptacle such that the interaction forces the plurality of fingers to engage the electrical conductor.

A system and method of interactive evaluation of a geometric model is provided. The method includes the steps of acquiring a haptic device position and orientation with respect to a surface of the geometric model and mapping the haptic device position and orientation into a geometric model coordinate reference system. The method also includes the steps of determining a closest point position and orientation on the surface of the geometric model to the haptic device position and extracting a surface property at the closest point position and orientation. The method further includes the steps of determining a stick-to-surface force and a property feedback force using the surface property at the closet point position and orientation and applying the stick-to-surface force and property feedback force to control a location and force output of the haptic device.

The invention discloses a material performance testing system under the fixed multi-field coupling action in a supergravity environment. The material performance testing system comprises a hoisting sealed cabin, a bearing frame, a high-temperature furnace, a mechanical testing device and a buffer device; the bearing frame and the high-temperature furnace are fixedly installed inside the hoisting sealed cabin, the bearing frame covers the high-temperature furnace, the buffer device is installed at the bottom inside the high-temperature furnace, the upper end and the lower end of the mechanical testing device are connected to the top of the bearing frame and the bottom of the high-temperature furnace, and the sample is connected and installed at the tail end of the mechanical testing device. The material performance testing system solves the problem of material dynamic performance testing under the coupling action of volume force-surface force-temperature under the high-speed rotation state, and is simple in structure, convenient to operate, safe and reliable.

A hair removal device having a handle with a first interior wall and a second opposing interior wall that has a tapered surface. A cover is mounted to the handle. A dispensing unit having a first and second position is within the handle. The dispensing unit has a reservoir containing a liquid, a pump in liquid communication with the reservoir in the second position, and first and second connectors that are spaced apart. The mounting of the cover to the handle urges at least one of the connectors to slide along the tapered surface forcing the first and second connectors toward each other.