4740results about How to "Maintain stability" patented technology

A mitral valve prosthesis and methods for implanting the prosthesis transapically (i.e., through the apex of the heart), transatrially (i.e., through the left atrium of the heart), and transseptally (i.e., through the septum of the heart). The prosthesis generally includes a self-expanding frame and two or more support arms. A valve prosthesis is sutured to the self-expanding frame. Each support arm corresponds to a native mitral valve leaflet. At least one support arm immobilizes the native leaflets, and holds the native leaflets close to the main frame.

An improved method of reducing and stabilizing the sternum after a sternotomy includes fixing a staple at the anterior surface of the sternum adjacent to each outlet for trans-sternal wire sutures. The staples are applied to the sternal halves to reinforce the bone adjacent to the suture outlets so as to prevent the suture from cutting into the bone. As each suture loop is tightened to adapt the sternum, the suture loop abuts the staples adjacent the suture outlets. The staples are deformed under force applied by the suture loop to indicate that the loop has been tightened to an optimum degree. A sterile surgical staple gun is employed to install the staples in the sternal halves. A kit for performing the improved sternal reduction procedure includes a pre-sterilized staple gun loaded with surgical staples, as well as suture / needle assemblies.

A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital regulator with at least one of electrical, thermal and optical feedbacks. The regulator is constructed as a hysteretic peak current mode controller for continuous mode of operation of the power converter. For discontinuous mode of operation of the power converter a pulse averaging sliding mode control is being used. Average LED current is measured by integrating LED pulse current at off time and hysteretically adjusting on time of the power switch. Input battery is protected from discharging at abnormally low impedance of the output.

An axial intramedullary screw having a straight cylindrical outer surface for the operative treatment of long bones, the screw having two tips and a screw thread extending between the tips. At each of the tips there is a connection portion for screwdriver. The screw thread is used for cutting into the cortical bone of the medullary canal and due to the screwdriver connection at both ends it can be driven from either end through the cortical bone. This allows a method to be used in which the screw is threaded into one portion of a bone fragment and then after connecting a further bone fragment at the fracture site, screwed in a different direction into that further fragment. The screw also includes a transverse screw hole at one or both ends for the passage of an interlocking transverse screw therethrough.

Novel exendin and exendin agonist compound formulations and dosages and methods of administration thereof are provided. These compositions and methods are useful in treating diabetes and conditions that would be benefited by lowering plasma glucose or delaying and / or slowing gastric emptying or inhibiting food intake.

Disclosed are a method, upstream processing node, and computer readable medium for dynamically stabilizing a stream processing system. The method includes receiving at least one computing resource allocation target. The method further includes determining that an input data flow rate of at least one upstream processing element varies. The computing resource is dynamically allocated to the upstream processing element in response to the input rate of the upstream processing element varying. Data flow is dynamically controlled between the upstream processing element and at least one downstream processing element.

An expandable intervertebral cage adapted to be implanted into an intervertebral disc space in a patient's body, the expandable intervertebral cage including first and second base plates having outer surfaces configured to interface with vertebra in the intervertebral disc space, a first, second and third arm assembly hingedly connected to first and second base plates, and first and second actuation members, wherein rotation of the first actuation member pulls the second arm assembly towards the first arm assembly and rotation of the second actuation member pulls the third arm assembly towards the second arm assembly, the first actuation member and the second actuation member capable of being actuated independently of each other.

A plasma generation method is provided to generate and maintain plasma by supplying a predetermined power that is lower than a normal power to a plasma generator. Plasma of an ignition gas is generated by supplying the normal power to the plasma generator. A power input to the plasma generator is decreased by a first power that is smaller than a difference between the normal power and the predetermined power. The power input to the plasma generator is decreased by a second power that is smaller than the first power. Decreasing the power input to the plasma generator by the second power is performed after decreasing the power input to the plasma generator by the first power and is repeated a plurality of times.

A RF catheter system includes a catheter with a proximal portion, a distal portion having a distal end and a lumen extending from the proximal portion to the distal portion. Inner and outer coaxially aligned conductors extend within the catheter and are coaxial with the lumen. A deflectable catheter guide is disposed within the catheter lumen and extends proximally within the catheter lumen and terminates distally of the distal end of the catheter to define a biological ablation pathway. A radio-frequency antenna is disposed at the distal portion of the catheter and is in electrical communication with the inner and outer coaxially aligned conductors. The radio-frequency antenna is adaptable to receive and transmit radio-frequency energy for ablating biological tissue along the ablation pathway.

A system and method to control the stability and direction of a quad tilt vertical takeoff and landing (VTOL) unmanned aerial vehicle (UAV) by manipulating the rotational speed of propellers at each rotor while simultaneously tilting the rotors in a 45 degree configuration related to a central axis for directional control. Each rotor is attached to a tilting mechanism configured to be symmetrically aligned at a 45 degree angle from a central axis to manipulate a directional angle of each rotor along a first and second axis. The first and fourth rotors are aligned on the first axis while the second and third rotors are aligned on the second axis. A controller includes a first control loop for manipulating the rotational speed of the propellers to control the aircraft balance and a second control loop for controlling lateral movement by tilting the rotors along the first and second axis.

The present invention relates to multi-phase personal care composition containing at least two visually distinct phases wherein at least one phase contains a particle. The phases form a pattern and are packaged in physical contact while remaining stable over time.

A multilayer printed circuit board has an IC chip 20 included in a core substrate 30 in advance and a transition layer 38 provided on a pad 24 of the IC chip 20. Due to this, it is possible to electrically connect the IC chip to the multilayer printed circuit board without using lead members and a sealing resin. Also, by providing the transition layer 38 made of copper on the die pad 24, it is possible to prevent resin residues on the pad 24 and to improve connection characteristics between the pad 24 and a via hole 60 and reliability.

Tool force information is provided to a user of a telesurgical system using an alternative modality other than force reflection on a master manipulator, such as providing the information on user-visible, user-audible, or haptic “buzz” or “viscosity” indicators, so as to allow expanded processing, including amplification, of the information, while not significantly affecting the stability of the telesurgical system or any closed-loop control systems in the telesurgical system.

Smart Active Tyre Pressure Optimising System [TPOS]102 is a highly time sensitive design and technique that acts instantaneously in sensing and controlling the tire pressure particularly in imminent and inevitable critical driving situations to reduce emergency & high speed breaking distance, mitigate—loss of traction, hydroplaning, roll over, loss of stability, over & under steering, break failure, loss of control due to puncture by smartly sensing, perform context aware computing and directing the Tyre Pressure Control Units [TPCU]104 to instantaneously control the tyre pressure in right time with right pressure on right tyres thereby actively controlling the footprint and sidewall deformation rate to enhance traction & stability simultaneously sustaining drivability or steerability ultimately to avoid or reduce the impact of collusion and overcome or mitigate critical situations for protecting the vehicles, occupants, pedestrians and other objects around or on the way; also according to design, configurations and scenarios the system instantaneously optimises the tyre pressure on all tyres for further safe driving till next restoration else restores the pressure to optimum preset value utilising inbuilt reservoir or other external restoration systems immediately after the vehicle overcomes the critical situation to continue with safe and comfortable driving. In critical situations TPOS performs sensing, pre computing, current computing for controlling the tire pressure during critical situation, post computing to optimise tire pressure after overcoming accordingly. TPOS 102 utilise smart and adaptive closed loop processing algorithm with predetermined and tested lookup table to instantaneously check and compare the effects between predetermined and tested real world scenarios to the actual real world scenarios for actively sensing, computing and controlling the tire pressure accordingly to mitigate the critical situations. The controlling of tyre pressure is computed mainly based on parameters comprising of sensor system, vehicle safety and stability systems, nature of breaking & break force distribution, tires upper & lower cut-off pressure values, sensing reservoirs and tires internal & external pressure, temperature, moisture, humidity, wheel & tire specifications, vehicle & wheel speed, acceleration & deceleration, vehicle orientation & axial rotation, transverse motion & lateral acceleration, tires position or angle of attack, load & torque distribution, tire traction, steering position, cornering effects, change in Centre of gravity, over & under steering, hydroplaning, sensing road conditions, etc and to further enhance the efficiency, the system interoperates with vehicles existing safety and stability systems like ABS, EBD, ESC, TCS, Rollover mitigation systems, ECU, BA, Precrash systems, suspension & vertical dynamics, radar assisted auto breaking, cruise control system, aerodynamics & airbrakes etc. Other aspects of present invention are controlling the tire temperature according to environmental temperature, moisture and humidity thereby to enhance traction and vary tire pressure according to change in centre of gravity & load, driving modes—comfort, standard and sports modes.

A device and method for equalizing the charge among a plurality of batteries redundantly driving a motor. The batteries are coupled to the motor through isolated windings and to each other through the drive shaft. The device senses the charge of the batteries and then controls the current from each of the batteries to its respective winding to equalize the charge. Related methods are provided to maximize the speed limit of a balancing transporter.

A device is provided for monitoring and controlling various power system device and elements. The device generally includes a communications channel for receiving phasor data associated with a location on the power system. The device further includes a logic engine which performs scalar, vector and / or other complex calculation based on the phasor data to provide control data or an output signal for effecting the various other power system devices or elements to provide local or wide area protection, control, and monitoring to maintain power system stability.

The occurrence of a slippage of a robot in operation, following a desired gait, is determined, and the permissible range of a restriction object amount, such as a floor reaction force horizontal component or a floor reaction force moment vertical component to be applied to the robot, is variably set according to a slippage determination result. A provisional motion of a desired gait is determined using a dynamic model, and if the restriction object amount defined by the provisional motion deviates from the permissible range, then the motion of a desired gait is determined by correcting the provisional motion by changing the changing rate of the angular momentum of the robot from the provisional motion so as to limit the restriction object amount to the permissible range, while satisfying a dynamic balance condition.

The invention discloses a spirofluorene xanthene material and a preparation method and an application method thereof, and relates to application of the material in the fields such as organic electroluminescence, photovoltaic cell, organic electrical storage, organic nonlinear optics, chemical and biological sensing, organic laser and so on. The material has the following structure. The material has the advantages that (1) the material is prepared through a one pot process and has simple steps and mild conditions; (2) the material has the advantages of spirobifluorene materials, and shows high thermal stability and vitrification temperature; and (3) the material has high hole or electron mobility and so on. An electroluminescent device prepared by utilizing the material achieves satisfactory results in aspects such as illumination, luminous efficiency, voltage withstand stability and so on.

Liquid polyoxaester polymer materials are provided as suspending vehicles suitable for dispensing of pharmaceutically active agents, such as proteins, from delivery devices, for example, pump-driven dosage forms. Polyoxaesters are made from at least one diacid and at least one diol. Through the use of polyoxaesters virtually solvent-free pharmaceutical suspensions can be created.

A multilayer printed circuit board has an IC chip 20 included in a core substrate 30 in advance and a transition layer 38 provided on a pad 24 of the IC chip 20. Due to this, it is possible to electronically connect the IC chip to the multilayer printed circuit board without using lead members and a sealing resin. Also, by providing the transition layer 38 made of copper on the die pad 24, it is possible to prevent resin residues on the pad 24 and to improve connection characteristics between the pad 24 and a via hole 60 and reliability.

The invention provides an alternating current charging pile system on the basis of a TD-LTE (time division long term evolution) network. Application of the TE-LTE network is combined. A charging pile substation serves as a site management center of alternating current charging piles, an analysis result on fault diagnosis of the site charging piles is provided via an embedded WEB server, aerial update service is provided for site charging pile firmware, load for an alternating current charging pile group is controlled and scheduled, remote fault diagnosing and monitoring and program updating service are realized, maintaining efficiency is improved, orderly charging is guaranteed by load controlling and scheduling, normal power supplying is reduced, charging quality for users is guaranteed, and stability of a power grid is maintained.

The invention discloses super-hydrophobic and super-oleophobic surface preparation technology. In the preparation technology, aluminum or aluminum alloy sheets are subjected to two-step electrochemical treatment, and then are modified by using perfluorinated octadecyl trichlorosilane or perfluorinated polymethacrylate to prepare the super-hydrophobic and super-oleophobic surface. The surface has super-hydrophobic property on aqueous solution of which the pH value is between 1 and 14 and super-oleophobic property on various oil drops, wherein a contact angle of the surface on water is 171 degrees, and a rolling angle is less than 1 degree; the surface expresses the super-oleophobic property on various oil drops except for perfluorinated polymer liquid, and all contact angles between the oil drops and the surface are more than 150 degrees, and rolling angles are generally less than 10 degrees; and the surface can also be put in air for a long time and can still maintain the super-hydrophobic property and super-oleophobic property.

The invention provides a control algorithm of multi-unmanned aerial vehicle cooperation formation and obstacle avoidance. The control algorithm comprises steps of (1) when an unmanned aerial vehicle formation executes a flight task, detecting positions and speed information of the unmanned aerial vehicles and airspace obstacles through an airborne sensor, and abstracting obstacles in a flight space into ball bodies; (2) according to position information of each unmanned aerial vehicle, constructing an unmanned aerial vehicle formation communication topology, and using a distributed transmission method, achieving information interaction between neighborhood unmanned aerial vehicles in the formation; (3) constructing an unmanned aerial vehicle dynamics model; and (4) when detecting an obstacle, determining a safe distance of obstacle avoidance of the unmanned aerial vehicles, judging whether the distance between any unmanned aerial vehicle and the obstacle in the unmanned aerial vehicleformation meets requirements of the safe distance, and if not, adjusting the formation pattern and carrying out obstacle avoidance through a virtual force strategy. The control algorithm is operable and simple; cooperation formation of multiple unmanned aerial vehicles can be achieved; obstacles can be avoided quite flexibly; and the control algorithm is very important for multi-cooperative combats.

The invention is a pad having a layer of resilient gel disposed on a layer of foam. The gel layer is preferably a silicone gel or other resilient gel such as a thermoplastic elastomer (TPE), SEBS or SEPS and the foam layer is preferably EVA foam. A soft rubber could also be used. The gel layer of the pad may have geometric cutouts such as pleats, grooves, flutings, corrugations, serrated shape, or any combination. The geometric cutouts may have a round, square, trapezoidal, triangular, rectangular, rectangular with rounded corners, half round shape or any combination. The geometric cutouts may also be hollow to further reduce gel material. The shape of the gel layer may be different or independent of the shape of any serrations or geometric cutouts on the foam layer. The pad may be flat or may be formed into a sleeve, a holder for beverage containers, a support pad, or a seat cushions. Many other uses and shapes are conceivable.

Disclosed is a pharmaceutical formulation for the stabilization and sustained delivery of an active pharmaceutical ingredient, such as the antidepressant, bupropion.

The invention pertains to pharmaceutical compositions of Zosyn® piperacillin with tazobactam in the presence of a buffer, preferably citrate, a particulate formation inhibitor, preferably EDTA optionally an aminoglycoside which when frozen and thawed or lyophilized and reconstituted reform a solution which has decreased particulate formation.