Abstract:
A system for treatment of biological tissues is provided. The system includes a lens having a hollow, substantially hemispherical shape with an outer surface and an inner surface, the inner surface defining a substantially hemispherical cavity for inserting the biological tissues. The system further includes an antenna assembly for generating and directing electromagnetic radiation towards the outer surface. In the system, the lens is configured to direct the electromagnetic energy to an area in the cavity, a dielectric constant of the lens at the inner surface substantially matches a dielectric constant of the biological tissues, the dielectric constant monotonically increases from the outer surface to the inner surface, and the electromagnetic energy is generated via a series of pulses having a transient of less than about 1 nanosecond.
Abstract:
An instrument 10 for delivering a high voltage pulse to tissue is disclosed. The instrument 10 can include an outer support member 12 with a liquid reservoir 14 that has a liquid-contacting interior surface 16, an opening 18 at a distal end 20 of the outer support member 12, and a ground electrode 22 extending in a longitudinal direction and having a lower surface 23 proximate the opening 18. The instrument 10 can also include a working electrode 26 extending longitudinally from the liquid-contacting interior surface 16 with a needle-shaped distal portion 28 proximate the distal end 20; and an inlet port 31 and an outlet port 34 in liquid communication with the liquid reservoir 14. The working electrode 26 can be electrically isolated from the ground electrode 22 by an insulating portion 30 of the outer support member 12, and a direct path can exist through the liquid reservoir 14 between the ground electrode 22 and the working electrode 26.
Abstract:
A method and device for aggregating algae in an aqueous solution is disclosed. The method can include providing an algae feed comprising a liquid and algae dispersed therein. The algae feed can be aggregated by applying a nanosecond pulsed electric field to the algae feed. The nanosecond pulsed electric field can include a plurality of electric pulses having a pulse duration ranging from 1 to 1,000 nanoseconds. The method can also include separating an aggregated algae stream from the algae feed and feeding the aggregated algae stream to a lipid extraction operation.
Abstract:
A projection system having a set of projectors that cast images: (i) onto the concave surface of a hemispherical dome, as is usual in planetariums and (ii) onto the surface of a centrally located sphere. The images thus cast may be coordinated by a controlling computer program, so that changes in the content or orientation of the images on the sphere result in corresponding changes in the images on the dome and vice versa.
Abstract:
Methods of fractionating proteins and lipids in algae are provided. The methods can extract peptides and amino acids from algae, can produce components used in food or fertilizer, and can improve algal biomass feed for biofuel production, as non-limiting examples. One embodiment of a method as disclosed herein comprises providing a feed material of algae saturated with water to a reactor, bringing the water saturating the algae to a subcritical temperature within the reactor and separating a reactor effluent into solids and liquid.
Abstract:
A system and method are provided for monitoring bladder distention. Independently controllable acoustic transmitters are coupled to the surface of a user's abdomen region in a spaced-apart fashion. Each transmitter can introduce a broadband acoustic signal into a portion of the abdomen region. Acoustic receivers are also coupled to the surface of the abdomen region to detect acoustic reflections generated when the acoustic signals are introduced into the abdomen region. A controller is positioned on the user and is correlated to an orientation of the user. The controller stores a profile indicative of anatomical features of the user. The controller initiates periodic activations of selected ones of the transmitters based upon the profile and the orientation of the user. The controller uses a weighted combination of all of the acoustic reflections to determine bladder distention of the user. The weighted combination is defined by at least the profile and orientation of the user.
Abstract:
A method and device for aggregating algae in an aqueous solution is disclosed. The method can include providing an algae feed comprising a liquid and algae dispersed therein. The algae feed can be aggregated by applying a nanosecond pulsed electric field to the algae feed. The nanosecond pulsed electric field can include a plurality of electric pulses having a pulse duration ranging from 1 to 1,000 nanoseconds. The method can also include separating an aggregated algae stream from the algae feed and feeding the aggregated algae stream to a lipid extraction operation.
Abstract:
An image processing system is described in which an image is converted into a plurality of image elements or cells which are arranged in a predetermined pattern. These cells are then simultaneously rearranged into a second predetermined pattern to provide a transformed representation of the original image. In this transformed state, the positions of all of the cells may be simultaneously shifted in a manner which produces modifications of the original image, such as scaling or rotating. The highly parallel manner in which the present system manipulates the image cells allows the desired image modifications to be effected more simply and rapidly than has been previously possible. In a preferred embodiment of the invention these image cell manipulations are performed in a three dimensional shift register of novel design. A number of alternative embodiments of the invention are set forth which are of particular value in pattern recognition systems and in graphic display systems in which the ability to modify or animate images is desired.
Abstract:
Provided herein are methods of generating a biologically effective unipolar nanosecond electric pulse by superposing two biologically ineffective bipolar nanosecond electric pulses and related aspects, such as electroporation and/or therapeutic applications of these methods to non-invasively target electrostimulation (ES) selectively to deep tissues and organs.
Abstract:
An apparatus and methods for performing ablation of myocardial tissues are disclosed. The apparatus includes a plurality of ablation electrode configurations to which nanosecond pulsed electric fields are applied. The methods relate to therapies to treat cardiac arrhythmias, such as, atrial fibrillation and scar-related ventricular tachycardia, amongst others. The affected myocardial tissues are ablated creating a plurality of lesions enabled by the nanosecond pulsed electric fields applied to either penetrating electrodes, endo-endo electrodes, or endo-epi electrodes. Different electrophysiological tests are performed to assess the application of nanosecond pulsed electric field ablation to specific desired tissue location within the heart. Test results show the potential to overcome limitations of current ablation therapies, thereby providing patients and doctors a superior treatment for cardiac arrhythmias.