A system of systems to monitor data for carbon flux, for example, at scales capable of managing regional net carbon flux and pricing carbon financial instruments is disclosed. The system of systems can monitor carbon flux in forests, soils, agricultural areas, body of waters, flue gases, and the like. The system includes a means to identify and quantify sources of carbon based on simultaneous measurement of isotopologues of carbon dioxide, for example, industrial, agricultural or natural sources, offering integration of same in time and space. Carbon standards are employed at multiple scales to ensure harmonization of data and carbon financial instruments.

This invention relates to novel methods for affecting, controlling and/or directing various crystal formation, structure formation or phase formation/phase change reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a crystallization reaction system. In a second aspect of the invention, at least one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other (or all) crystallization reaction system participants being introduced into the reaction vessel.

A MEMS piezoelectric device includes a monolithic semiconductor body having first and second main surfaces extending parallel to a horizontal plane formed by first and second horizontal axes. A housing cavity is arranged within the monolithic semiconductor body. A membrane is suspended above the housing cavity at the first main surface. A piezoelectric material layer is arranged above a first surface of the membrane with a proof mass coupled to a second surface, opposite to the first surface, along the vertical axis. An electrode arrangement is provided in contact with the piezoelectric material layer. The proof mass causes deformation of the piezoelectric material layer in response to environmental mechanical vibrations. The proof mass is coupled to the membrane by a connection element arranged, in a central position, between the membrane and the proof mass in the direction of the vertical axis.

Methods and systems for using the Earth's magnetic field to power a machine having a motor, the system including a computer, a plurality of wires, a plurality of energy storing devices, all in controlled electrical communication with each other, wherein the plurality of wires can collect electrical energy from the Earth's magnetic field while the machine is put in motion by a power source powering the motor, wherein the collected electrical energy is stored in the plurality of energy storing devices or used to power the motor.

A monolithic integration of phase change material (PCM) switches with a MEMS resonator is provided to implement switching and reconfiguration functionalities. MEMS resonator includes a piezoelectric material to control terminal connections to the electrodes. The PCM is operable between an ON state and an OFF state by application of heat, which causes the phase change material to change from an amorphous state to a crystalline state or from a crystalline state to an amorphous state, the amorphous state and the crystalline state each associated with one of the ON state and the OFF state. A method of fabricating the MEMS resonator with phase change material is provided. A reconfigurable filter system using the MEMS resonators is also provided.

A hat system relating to reducing and/or eliminating physical interferences between hat bills and eyewear rims by the introduction of strategic hat bill cutouts along the periphery of the bill as a means for providing additional physical clearance for user-chosen eyewear. Additionally, users of the preferred hat system may also take advantage of bill cutouts as a means to secure eyewear on the face during sports, or other moments of high activity. Further, the hat system incorporates a camouflage covering to camouflage such strategic hat bill cutouts. Even further, the hat system provides unique design elements provided by geometrically-shaped bill cutouts in combination with, or without, coverings.

According to some aspects, a cymbal system is provided, comprising a cymbal, and a vibrational transducer magnetically coupled to the cymbal, the magnetic coupling provided by at least one magnetic component on an upper side of the cymbal and at least one magnetic component on a lower side of the cymbal. According to some aspects, a method for transducing vibrations of a cymbal is provided, comprising magnetically coupling a vibrational transducer to a cymbal, the magnetic coupling provided by at least one magnetic component on an upper side of the cymbal and at least one magnetic component on a lower side of the cymbal.

The present disclosure relates to an apparatus, system, and method that allow non-musicians to compose and perform a musical composition. Although some existing electronic devices can provide a virtual environment to compose and play musical sound digitally, manipulating such a virtual environment can be difficult and may require specific software expertise, as well as knowledge of music theory. The present disclosure provides a platform that facilitates the creation of a musical composition without such software expertise or knowledge of music theory. The platform models a musical composition as a simultaneous playback of one or more musical contents. The platform allows players to control or modify one or more of the plurality of musical contents to generate or synthesize a musical composition.

A system and method providing a facade for portable toilets and other structures includes a plurality of panels that mimic or emulate a more aesthetically pleasings structure. The facade may provide the appearance of a house or other structure to disguise the less appealing form of a portable toilet. One, two, three or more panels connect about a portable toilet structure and may partially or completely connect to the portable toilet structure itself. The facade is optionally comprised of lightweight and easily transportable material.

Thermally-isolating wall anchors and reinforcement devices and anchoring systems employing the same are disclosed for use in masonry cavity walls. A thermally-isolating coating is applied to the wall anchor, which is interconnected with a wire formative veneer tie. The thermally-isolating coating is selected from a distinct grouping of materials, that are applied using a specific variety of methods, in one or more layers and cured and cross-linked to provide high-strength adhesion. The thermally-coated wall anchors provide an in-cavity thermal break that severs the thermal threads running throughout the cavity wall structure, reducing the U- and K-values of the anchoring system by thermally-isolating the metal components.

A pole splint, generally for use with a broken wooden utility pole, which can provide for a strong repair at a pole breakpoint and which uses relatively little manpower and equipment to install, even under difficult conditions. The splint generally comprises two panels which are designed to be interconnected with elongated connectors. The connectors will generally interact with one of the panels through the use of a nut and washer, and may connect with the other panel through a nut and washer or via a chain formed of chain links.

A method comprises receiving an input coupling adjacent to a drive input, the drive input being driven by an actuating element, the input coupling being coupled to a joint output, the joint output being connected to a movable object. The method further comprises rotating the actuating element until a resistance torque is experienced by the actuating element and determining, based upon the resistance torque, whether the drive input has engaged the input coupling.

A method of forming oral orthotic systems includes providing an upper dental member adapted to be placed in connection with upper dentition of the patient, providing a lower dental member adapted to be placed in connection with lower dentition of the patient and providing a plurality of posterior mounting structures. Each of the posterior mounting structure is configured to be attached to one of the upper dental member or the lower dental member at a posterior, buccal position thereon. Force may be applied to the mandible of the patient via at least one of a plurality of different types mechanisms via attachment of a component of a selected type mechanism to at least one of the posterior mounting structures.

In certain example embodiments, a system and/or method of guiding transitions between therapy modes in connection with the treatment and/or diagnosis of a patient for a respiratory disorder is/are provided. Respiratory disorder treatment according to a first therapy mode is provided. Input indicating a second therapy mode to be transitioned to following provision of the first therapy mode is received, with the second therapy mode being different from the first therapy mode. At least one default treatment parameter suitable for the second therapy mode is assigned or calculated. Each default treatment parameter of the second therapy mode is presented, with each default treatment parameter being adjustable by an operator during the presenting. Transitioning from the first therapy mode to the second therapy mode is performed by providing respiratory disorder treatment in accordance with the second therapy mode and each default treatment parameter and any adjustments made thereto prior to the transitioning. Advantageously, the chances of a patient being disturbed by transitioning from mode-to-mode are reduced.

An example method for detecting respiratory disturbances experienced by a subject can include receiving an airflow signal and at least one of an acoustic or vibration signal, where the airflow, acoustic, and/or vibration signals are associated with the subjects breathing. At least one feature can be extracted from the airflow signal and at least one feature can be extracted from at least one of the acoustic or vibration signal. Based on the extracted features, at least one respiratory disturbance can be detected. The respiratory disturbance can be flow limited breath or inspiratory flow limitation (“IFL”).

Systems and methods for effecting posture of a subject who is to be positioned on a support surface having an inclinable portion such that the subject's thorax is inclinable relative to the subject's legs, are provided. An example system includes a detachedly coupleable thoracic harness having at least an inner surface and an outer surface. The inner surface being contoured to fit over shoulders of the subject. The outer surface having a fastening surface that releasable attaches to a corresponding fastening surface disposed on the inclinable portion of the support surface.

This disclosure describes systems and methods for controlling pressure and/or flow during exhalation. The disclosure describes novel exhalation modes for ventilating a patient.

A respiratory mask or other sealing interface can be used in combination with a nasal cannula or other unsealing interface in providing respiratory therapies for the treatment of COPD or OSA. The mask can act as a pressure vessel over the top of a nasal cannula, with the intention of increasing expiratory pressure whilst allowing the nasal cannula to provide a user with breathing gases of a high humidity and temperature. The ability to selectively apply increased expiratory pressure may be effective in reducing a user's breathing rate and thus beneficial in the treatment of respiratory distress.

Methods, systems, and apparatuses are described that indicate an amount at which various gas flow rates should be manually adjusted in order to achieve targeted total flow rates and concentration levels.

A device comprising: a receive antenna configured to receive a first radio-frequency (RF) signal having a first center frequency; a first transmit antenna configured to transmit a second RF signal having a second center frequency that is a harmonic of the first center frequency; a second transmit antenna configured to transmit a third RF signal having a third center frequency that is a harmonic of the first center frequency and is different from the second center frequency; first circuitry, coupled to the receive antenna and to the first transmit antenna, configured to generate the second RF signal using the first RF signal and provide it to the first transmit antenna for transmission; and second circuitry, coupled to the receive antenna and to the second transmit antenna, configured to generate the third RF signal using the first RF signal and provide it to the second transmit antenna for transmission.

Various integrated high quality electronic components and systems, and methods of their manufacture, are presented. In one example, a device includes a glass substrate or interposer including one or more metalized through-glass vias (TGVs). The one or more metalized TGVs can be used to form a substrate integrated waveguide, a complementary split ring resonator, a disc loaded monopole antenna or other device. An array of metalized TGVs can define side walls of the integrated waveguide. A disc coupled to a tip of a metalized TGV can provide capacitive disc loading of the monopole antenna.

Various systems and methods for radiating RF transmissions outside of a portable electronic device with a conductive case. In an embodiment, this solution includes a conductive enclosure, a circuit board within the conductive enclosure, at least one non-conductive gap between the circuit board and the conductive enclosure, and a radio frequency (RF) connection between the circuit board and the conductive enclosure. The combination of enclosure and gaps can excite certain radiation modes at high frequency bands, such as a cavity-backed lambda-long slot radiation mode.

Microfluidic devices having an electrowetting configuration and an optimized droplet actuation surface are provided. The devices include a conductive substrate having a dielectric layer, a hydrophobic layer covalently bonded to the dielectric layer, and a first electrode electrically coupled to the dielectric layer and configured to be connected to a voltage source. The microfluidic devices also include a second electrode, optionally included in a cover, configured to be connected to the voltage source. The hydrophobic layer features self-associating molecules covalently bonded to a surface of the dielectric layer in a manner that produces a densely-packed monolayer that resists intercalation and or penetration by polar molecules or species. Also provided are microfluidic devices having an electrowetting configuration that further include a section or module having a dielectrophoresis configuration; systems that include any of the microfluidic devices in combination with an aqueous droplet and a fluidic medium immiscible with the medium of the aqueous droplet; related kits; and methods of manipulating droplets, optionally containing micro-objects such as biological cells, within the microfluidic devices.

In one aspect, a biological sequencing device comprising a cartridge configured to be removed from the instrument is disclosed. In various embodiments the cartridge can include one or more capillaries suitable for capillary electrophoresis, a reservoir and a pump. In various embodiments the reservoir can contain a separation matrix. In various embodiments the pump can load a capillary with separation matrix. In another aspect the biological sequencing device can include one or more capillaries and an integrated valve assembly. In various embodiments the integrated valve assembly can provide a polymer to the one or more capillaries.

The present disclosure relates, in some embodiments, to an apparatus for conducting a capillary electrophoresis assay. The apparatus can comprise a capillary array comprising an anode end and a cathode end, the capillary array provided in a housing further comprising a reservoir configured to house a separation medium and an anode buffer. The system can also comprise an injection mechanism configured to deliver sample to the cathode end of the capillary array, and a temperature control zone, wherein the temperature control zone is configured to control the temperature of the interior of the housing.

An automated peritoneal dialysis system provides various features including prescription-driven dialysis fluid preparation, an integrated disposable fluid circuit, and sensor capabilities that allow accurate filing and draining control with high safety margins. Features include a peritoneal fluid circuit with a pressure sensor at either end and methods and devices for using the pressure signals. Other features and embodiments are disclosed.

Vascular access system embodiments can be configured to remove gas and a piercing member from a catheter assembly. In some embodiments, vascular access systems can remove gas and at least a portion of a piercing member concurrently or simultaneously. In some embodiments, vascular access systems can remove gas before removing at least a portion of a piercing member. In several embodiments, a vascular access system can include a first barrel configured to remove gas and a second barrel configured to retract a piercing member.

A medical device comprising a subcutaneous access port having an access port body and at least one needle having a removable needle tip and a needle shaft defining a needle lumen; the at least one needle housed within the access port body, the at least one needle extendable and retractable relative to the access port body; and a needle shift mechanism operable such that the at least one needle is extendable from and retractable into the access port body at a plurality of positions of the access port body.

Precision AC and DC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address remnant magetization within the current comparators that form the basis of the measuring process within many of the measurement instruments providing the precision AC and DC measurements and calibrations. Accordingly, the inventors present current comparator and measurement system architectures together with control protocols to provide for correction of this remnant magnetization.

Embodiments include apparatuses, systems, and methods including a switching converter having an output stage including a power switch or first switching device to convert an input switching signal to an output switching signal and a sensor stage including a second switching device and a third switching device. In embodiments, the sensor stage may be coupled to receive the output switching signal from the first switching device and to substantially replicate a condition of the first switching device to generate a continuous signal rather than a switched signal. In embodiments, the continuous signal may allow detection of a current level. In some embodiments, the current level may indicate an overcurrent event. A digital post-processing circuit may be coupled to the switching device to count a number of overcurrent events according to various embodiments. Other embodiments may also be described and claimed.

A system (100, 200) is presented. The system includes a fluid lifting device (102, 202) located inside a well (106, 206), and comprising an electrical motor (108, 208), a three phase cable (114, 214) for coupling the fluid lifting device to a power source (112, 212), at least one high sensitivity differential current transformer (104, 203, 204) for generating imbalance signals (128, 227) representative of an imbalance current in at least one of the electrical motor and the three phase cable, wherein the at least one high sensitivity differential current transformer is disposed such that the at least one high sensitivity differential current transformer surrounds at least a portion of the three phase cable, and a processing subsystem (136, 236) for monitoring the health of at least one of the fluid lifting device and the three phase cable based on the imbalance signals.

A system can include at least one circuit breaker. The system can also include a prognostic and health monitoring (PHM) system. The PHM system can include at least one measuring device that measures at least one parameter associated with the at least one circuit breaker. The PHM system can also include a controller that receives measurements made by the at least one measuring device and analyzes the measurements to evaluate a performance of the at least one circuit breaker. The measurements can be made while the at least one circuit breaker is in service.

Mass flow controllers with on-tool diagnostic capabilities and methods for on-tool diagnosis of mass flow controllers are disclosed herein. One method includes opening a control valve to a fixed position and closing an upstream valve to produce a flow rate that decreases from a high flow rate, across a range of flow rates, to a low flow rate. A pressure signal is generated that is indicative of a pressure of the fluid within a volume between the upstream valve and a sensor tube, and a flow sensor signal is provided with the mass flow sensor that is indicative of a mass flow rate of the fluid through the main flow path. Ratio curves are produced that relate, across the range of flow rates, a rate of change of the pressure signal to the flow sensor signal and comparing a test ratio curve to a previously generated baseline ratio curve.

Embodiments of the disclosure relate to ultrasonic inspection of turbine components. In one embodiment, a method for ultrasonic inspection of a turbine component can include mounting at least one array of transducer elements to the turbine component, (a) separately pulsing a transducer element of the at least one array of transducer elements to transmit a signal to the turbine component, (b) capturing reflected signals from the turbine component at each transducer element in the at least one array of transducer elements, repeating (a) and (b) for each of the other transducer elements in the at least one array of transducer elements, maintaining a constant relative position of the array of transducer elements with respect to the turbine component, analyzing the captured reflected signals using a computer, generating an image of the interior volume of the turbine component by reconstruction of the captured reflected signals and based at least in part on detecting an anomaly in the image of the interior volume of the turbine component, identifying at least one defect or failure in the turbine component.

A multi-dimensional liquid analysis system includes a first dimension system and a second dimension system, wherein outflow from the first dimension system is separated at a flow splitter under controlled conditions. The flow splitter separates the first dimension outflow into first and second split outlet flows, with one of the split outlet flows being metered to a designated flow rate with a flow metering device disposed downstream from the flow splitter. The flow metering device selectively closes or opens an outlet flow path to define a volumetric flow rate along that outlet flow path, so that the other split outlet flow is correspondingly controlled.

A method and system for a sensor system of a device is disclosed. The sensor system includes a first MEMS sensor (FMEMS), a second MEMS sensor (SMEMS) and a signal processor (SP). An excitation is imparted to the device along a first axis (FA). The FMEMS has a first primary sense axis (FPSA), moves in response to a component of the excitation along the FA aligned with the FPSA and outputs a first signal proportional to an excitation along the FPSA. The SMEMS has a second primary sense axis (SPSA), moves in response to a component of the excitation along the FA aligned with the SPSA and outputs a second signal proportional to an excitation along the SPSA. The SP combines the first signal and the second signal to output a third signal proportional to the excitation along the FA. The FA, the FPSA and the SPSA have different orientations.

Systems and methods are provided for calibrating and regulating the temperature of a sensor. One or more temperature adjusting devices can be provided to regulate the temperature of the sensor. One or more of the temperature adjusting devices can be provided to perform a calibration to determine a relationship between sensor bias and sensor temperature. The one or more temperature adjusting devices can be built into the sensor.

A process for fabricating an organic photodetector is presented. The process includes providing an array of thin film transistor assemblies, each thin film transistor assembly including a first electrode disposed on a thin film transistor; disposing an organic semiconductor layer on the array; disposing a second electrode layer including a first inorganic material on the organic semiconductor layer through a shadow mask to form a first etch stop layer; and removing portions of the organic semiconductor layer unprotected by the first etch stop layer using a dry etching process to form a multilayered structure. An organic photodetector, for example an organic x-ray detector fabricated by the process is further presented. An x-ray system including the organic x-ray detector is also presented.

A method that includes clarifying a thin stillage product in a mechanical processor to produce a fine suspended solids stream and a clarified thin stillage is provided. The method further includes providing the thin stillage product and the clarified thin stillage, separately or in a combined stream, to one or more evaporators to produce one or more reduced suspended solids streams, each stream having a reduced amount of suspended solids and a lower viscosity as compared to process streams having a comparable total solids content but containing a higher amount of suspended solids. The method can further included further processing of one or more of the reduced suspended solids streams to produce a bio-oil product.

Measurements are taken of moisture, BTU/lb (British Thermal Units per pound), ash, forms of sulfur, volatile material, grindability, and absorption properties of any of a wide variety of mine-run solid fuels. Using that information, a dry electromagnetic process technology has been developed that can be controlled and monitored to selectively alter and enhance metallurgical solid fuel properties. Specific changes include altering the mechanical structure and chemical composition of solid fuels such as coal, coal coke or petroleum coke, increasing the BTU/lb to optimum levels, decreasing all forms of sulfur, and decreasing ash, while maintaining the BTU/lb of the fuels. A new family of solid fuel designer coals not found in nature can be produced via these methods and apparatus.

Systems and methods for producing engineered fuels from municipal solid waste material are described herein. In some embodiments, a method includes combining a first waste stream that includes at least one of hard plastic, soft plastic and mixed plastic with a sorbent and increasing the temperature of the combined first waste stream and sorbent to a temperature of at least about 200° C. The method further includes combining the thermally treated first waste stream and sorbent with a second waste stream that includes fiber, and compressing the combined first waste stream, sorbent, and second waste stream to form a densified engineered fuel feedstock.

Systems and methods for controlling fluid movement and volumes of fluid between a subject and a controlled compliant flow path. The controlled compliant flow path has a means for selectively metering in and metering out fluid from the controlled compliant flow path. An extracorporeal flow path is in fluid communication with the controlled compliant flow path across a semi-permeable membrane where the extracorporeal flow path has a first terminal end and a second terminal end.

A pollution mitigation system is disclosed. The system can include a valve forming a passage the valve installable to form an orifice in a storm drain retention chamber that passes storm water into a conduit of a storm water management system. The valve having a stem connected to a closure member that can plug the orifice. The valve can have a spring loaded actuator that can move the closure member into a closed position. The system can also include a node such as a wireless sensor node or a mote that has sensors, a transceiver, an antenna, a microcontroller, memory, an energy source and at least one output to control movement of the closure member via the preloaded actuator. The node can have an output that provides the stimulus to the preloaded actuator to cause the preloaded actuator to move the closure member to a position that obstructs the passage in response to either the sensor or a transmission from a mobile telephone such as a cell phone or a smartphone.

Disclosed herein are methods for reducing fouling caused by process water present within a water recycling loop of a pyrolysis plant. The process water includes water, a pygas, and in some cases pygas byproducts. Fouling is caused by phase separation and accumulation of materials from the process water on equipment surfaces. The method includes applying a total of about 5 ppm to 500 ppm of one or more antifouling polymers to the process water to form a treated process water. The one or more antifouling polymers are selected from the group consisting of copolymers of unsaturated fatty acids, primary diamines, and acrylic acid; copolymers of methacrylamidopropyl trimethylammonium chloride with acrylic acid and/or acrylamide; copolymers of ethylene glycol and propylene glycol; and blends of two or more thereof.

The invention generally relates to assemblies for displacing droplets from a vessel that facilitate the collection and transfer of the droplets while minimizing sample loss. In certain aspects, the assembly includes at least one droplet formation module, in which the module is configured to form droplets surrounded by an immiscible fluid. The assembly also includes at least one chamber including an outlet, in which the chamber is configured to receive droplets and an immiscible fluid, and in which the outlet is configured to receive substantially only droplets. The assembly further includes a channel, configured such that the droplet formation module and the chamber are in fluid communication with each other via the channel. In other aspects, the assembly includes a plurality of hollow members, in which the hollow members are channels and in which the members are configured to interact with a vessel. The plurality of hollow members includes a first member configured to expel a fluid immiscible with droplets in the vessel and a second member configured to substantially only droplets from the vessel. The assembly also includes a main channel, in which the second member is in fluid communication with the main channel. The assembly also includes at least one analysis module connected to the main channel.

The present disclosure relates to use of high-concentration aldehyde-based fixatives to fix tissue samples. Aldehyde concentrations are selected that significantly increase rate of diffusion of the fixative solution into the tissue. When combined in the cold-temperature step of a two-temperature fixation, a substantial improvement in the preservation of post-translationally modified proteins is achieved.

A ground fault circuit interrupter (GFCI) breaker testing system can include an enclosure having at least one wall that forms a cavity. The system can also include at least one GFCI breaker disposed within the cavity. The system can further include a sensing circuit assembly having at least one switch, where the at least one switch is electrically coupled to the at least one GFCI breaker. The system can also include a user interface assembly disposed, at least in part, outside the cavity, where the user interface assembly is coupled to the sensing circuit assembly, where the user interface assembly instructs the at least one switch to test the at least one GFCI breaker.

ONLY a delusional Lib Dem like Martin Kyrle could come up with an excuse like this about his beloved party doing well in the last election when in fact they lost over half their seats, then blaming it on our undemocratic electoral system, it’s the system we have, and our MP’s are elected on that system.

A gas turbine that includes: a combustor coupled to a turbine that define a working fluid flowpath; a compressor discharge cavity; a staged injection system that includes the forward injector and a staged injector; a stator blade positioned extending across the working fluid flowpath between an inboard sidewall and an outboard sidewall. A one-way continuous coolant flowpath that includes: an intake section that comprises an upstream port connected to the compressor discharge cavity and a downstream port formed through one of the inboard and outboard sidewalls; an outtake section that comprises a downstream port connected to the staged injector and an upstream port formed through the same one of the inboard and outboard sidewalls; and a cooling circuit extending through an interior of the airfoil of the stator blade and connecting to the downstream port of the intake section and the upstream port of the outtake section.

An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.