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Boost Converter Methods and System

Electric vehicle (EV) energy systems (fuel cell, battery, supercapacitor) demand power conversion technologies that can vary voltage based on the load or state of charge. This means operating in a dynamic operating environment such as supplying energy during acceleration and storing it during braking. DC-DC boost converters are a widely used component in the power systems of EVs to step the voltage between input (supply) to output (load) during charge-discharge periods. Traditional voltage/current controls for DC-DC converters utilize pulse-width modulation (PWM) controls. While PWM has worked well in the past, it lacks practical stability range under uncertain operating parameters due to its reliance on linearized models of DC-DC converter dynamics.

(SD2022-122) Unsupervised channel compression method for low power neural prostheses

Brain machine interfaces (BMIs) have the potential to help individuals with functional impairments, such as loss of motor control, due to neurological disease or spinal cord injury. BMIs map brain signals acquired in relevant brain regions to patient intent to enable functional restoration. In previous studies, BMIs have enabled patients to control robotic arm movements, and type by translating brain signals directly into text.  Intracortical BMIs record and sample brain signals from relevant regions of the brain at rates high enough to process both local field potentials (LFP) and action potentials (spikes).The development of high performance brain machine interfaces (BMIs) requires scaling recording channel count to enable simultaneous recording from large populations of neurons. Unfortunately, proposed implantable neural interfaces have power requirements that scale linearly with channel count. 

Fluidic System For The Rotational Cycle-Determined Release Of Liquid From A Chamber In A Rotor

See patent information below. The present invention relates to a fluidic device. More specifically but not exclusively, the present invention relates to serial siphon valves for a fluidic device. Control of the release of liquid from a fluidic chamber via a spinning rotor is a very important function in the area of centrifuged-based fluidic systems for applications such as immunoassays, nucleic acid analysis, biochemical tests, chemical tests and sample preparation. This is because it is often necessary to mix different reagents together at the appropriate time, either in parallel or in series.   It is a non-limiting object of the present invention to provide a method using a co-radial arrangement of siphon structures each separated by a capillary valve in a fluidic system. Such a method allows saving radial space. This saved radial space can be used, for example, to add more features on a fluidic device. It is a non-limiting object of the present invention to provide siphon structures that enable to sequentially distribute liquids in a fluidic system upon successive centripetal accelerations and decelerations applied to a rotary platform. Sequential fluid distribution can be controlled by the length and number of serial siphon structures. It is a non-limiting object of the present invention to provide a device using a co-radial arrangement of siphon structures each separated by a capillary valve in a fluidic system. Such a device allows saving radial space. This saved radial space can be used, for example, to add more features on a fluidic device. 

Modular Piezoelectric Sensor Array with Beamforming Channels for Ultrasound Imaging

Researchers at the University of California, Davis have developed a large area sensor array for ultrasound imaging systems that utilizes high-bandwidth piezoelectric sensors and modular design elements.

Machine Learning-Based Monte Carlo Denoising

Brief description not available

Cascaded Resonant Switched-Capacitor For Power Converter Architecture

Data center power demands are growing fast. To address this situation, next-generation data centers are moving to 48 V bus architectures to reduce distribution loss on the bus bar of server racks. One important research topic regarding this architecture is stepping down from 48 V to the point-of-load voltage, which is usually implemented by an intermediate bus converter followed by a voltage regulator, with the benefits of high efficiency and reutilization of 12 V legacy systems.Many topologies have been explored for the 48-to-12 V intermediate bus applications, such as inductor-based converters. However, since capacitors have higher energy densities compared with inductors, switched-capacitor based converters have the potential to achieve higher power density and have gained increasing attention in performance-driven applications. Integrating resonant conductors into cascaded switch-capacitor converters further improves performance.To address this potential, researchers at UC Berkeley developed a novel resonant switched-capacitor based converter. The Berkeley converter uses a simple structure and operation principle, and has the potential to achieve dramatic efficiency and power density improvement over existing leading alternatives.

High-Efficiency Heat Exchanger Operating at Elevated Temperatures and Pressures

Researchers at the University of California, Davis have developed a heat exchanger produced by additive manufacturing that operates with high efficiency under high pressure and temperature conditions.

Microchannel Polymer Heat Exchanger

Researchers at the University of California, Davis have developed a highly efficient microchannel polymer heat exchanger in a compact and lightweight design.

High-Frequency Imaging and Data Transmission Using a Re-configurable Array Source with Directive Beam Steering

Researchers at the University of California, Davis have developed a reconfigurable radiator array that produces a high frequency directed beam via uninterrupted, scalable, electronic beam steering.

Programmable System that Mixes Large Numbers of Small Volume, High-Viscosity, Fluid Samples Simultaneously

Researchers at the University of California, Davis have developed a programmable machine that shakes and repeatedly inverts large numbers of small containers - such as vials and flasks – in order to mix high-viscosity fluids.

An Automated Quality Monitoring and Control Method for Concrete 3D Printing / Additive Manufacturing

3D printing of concrete structures is a highly efficient, cheap process. However, imperfections are difficult to detect and can compromise the performance of these structures. UCI researchers have developed a method in which a current sent through the printed structure produces a “fingerprint” that allows the real-time detection of flaws in the concrete structure.

Scalable High Intensity Ultrashort Pulse Compressor And Cleaner

This invention is a high intensity ultrashort pulse compressor that filters out low intensity artifacts and is made with commercially available low-cost components. This integrated system also provides scalability and can therefore be used for a range of laser intensities.

Laser additive manufacturing method for producing porous layers

The inventors at UCI have created a method of doping layered cathode materials in sodium-ion batteries. In this method more than five impurity elements are introduced into a host material, in this case a sodium-based layered cathode material, Na0.667Mn0.666Ni0.167Co0.167O2. This technique is being utilized in order to create sodium-ion batteries that are more competitive with the historically used lithium-ion battery.

Integrated Virtual Reality and Audiovisual Display Support System for Patients in a Prone Position

Researchers at the University of California, Davis have developed an integrated virtual reality and audiovisual support system that increases the comfort of patients who are undergoing diagnostic tests or medical procedures in the prone and other positions.

Nanocellulose-based Aerogel Fibers as Insulation

Researchers at the University of California, Davis have produced continuous, sheath-core, coaxial fibers with highly porous, nanocellulose, aerogel cores for use as high-performance insulators.

Digital Droplet Infusion System for High-Precision, Low-Volume, Delivery of Drugs or Nutritional Supplements

Researchers at the University of California, Davis have developed the first, digital, droplet infusion system capable of high-precision delivery of very low-volume therapeutics or nutraceuticals.

Use of Ozone and Infrared Heating as a Pre-treatment for Drying Fruit

Sequential ozone and infrared pre-treatments prior to hot air drying of fruit inactivates enzymes responsible for fruit browning, and concurrently reduces microbial contamination risk and air drying time.

Group 13 Metals as Anolytes in Non-Aqueous, Redox Flow Batteries

Researchers at the University of California, Davis have identified earth abundant and other relatively inexpensive materials that form the basis of novel molecules (anolytes), with long lifecycles and high energy densities, to be used in redox flow batteries.

Phased-Locked Loop Coupled Array for Phased Array Applications

Researchers at the University of California, Davis have developed a phased-locked loop coupled array system capable of generating phase shifts in phased array antenna systems - while minimizing signal losses.

Multi-Phase Hybrid Power Converter Architecture With Large Conversion Ratios

The power demands on data centers are large and increasing rapidly. This is straining data center economic and environment impacts, and in turn driving improvements in data center power efficiencies. Data centers have been widely adopting 48 V intermediate bus architectures due to higher efficiency, good flexibility, and reduced cost. However, a major challenge in such systems is the conversion from the 48 V bus to the extreme low voltage and high current operating levels of server CPUs and GPUs.To address this challenge, UC Berkeley researchers developed a multi-phase hybrid power converter architecture. The Berkeley design uses hybrid converter topologies. A switched-capacitor network is smartly merged with a switched-inductor network, resulting in circuit component number reduction and soft-charging operation of the capacitors. Furthermore, the Berkeley architecture integrates a multi-phase control technique to achieve a higher conversion ratio of the switched-capacitor network, which can further improve the overall system efficiency without increasing the circuit size.  

Carbon Nanotube based Variable Frequency Patch-Antenna

Researchers at UCI have developed a patch antenna constructed from carbon nanotubes, whose transmission frequency can be tuned entirely electronically. Additionally, the antenna can be made operable in the microwave to visible frequency regime by simply varying the device dimensions and composition.

Charged Membranes Incorporated With Porous Polymer Frameworks

Ion-exchange membranes have been established for a variety of industrial applications, including energy and environmental technologies related to water treatment, fuel cells, and flow batteries. However, the limited tunability and adverse ion permeability-selectivity tradeoff exhibited by traditional ion-exchange membranes limit their development. To address this limitation, researchers at UC Berkeley developed a new class of composite ion-exchange membrane materials incorporated with highly tunable porous aromatic frameworks (PAFs). The Berkeley researchers show that an assortment of PAF variants can be easily embedded into charged membranes, where the choice of PAF filler can be used to optimize the physical, ion transport, and adsorptive properties of the membrane according to their targeted application. Material characterizations indicate that numerous charged membranes embedded with PAFs exhibit excellent dispersibility, interfacial compatibility, structural flexibility, and pH stability. Proton conductivity and water uptake measurements also indicate that the exceptionally high porosity of PAFs enhances ion diffusion in membranes, while abundant, favorable PAF-polymer interactions decrease non-selective swelling pathways typically observed in highly charged ion-exchange membranes. Furthermore, adsorption experiments demonstrate that ion-selective PAFs can be embedded into charged membranes to tune the ion selectivity of the membrane and also enable their use as membrane adsorbents. Test show promise for technology to improve the general performance and tunability of ion-exchange membrane technologies.

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