摘要:
The present invention relates to immobilized biologically active entities that retain significant biological activity following mechanical manipulation of a substrate material to which the entities are immobilized.
摘要:
An elongate, malleable ablation probe including an elongate malleable body and a plurality of longitudinally spaced apart electrodes disposed at a distal end thereof. The electrodes are separated one from another by insulative material. In one embodiment, a malleable insert is provided for insertion into a flexible longitudinal sleeve, the flexible longitudinal sleeve conforming to the shape of the malleable insert upon such insertion. In other embodiments, a malleable core is surrounded by a flexible body, the electrodes being mounted to the body.
摘要:
A system (2,4), method and splitter (6) for ablating tissue (15) using radiofrequency (RF) energy is disclosed. The system (2,4) ablates tissue (15) using unipolar RF energy simultaneously delivered to multiple electrodes (22A-22D) in one or more probes (20). This is carried out by the multiple channel RF splitter (6) that can independently control the RP energy delivered through each channel (18) to a respective electrode (22A-22D) in a continuous manner. Each electrode (22A-22D) has a corresponding temperature sensor or transducer (36A-36D) that is processed independently so that the amount of RF energy delivered to each electrode (22A-22D) can be varied dependent on the temperature of the electrode (22A-22D) so that the lesion size produced by each electrode (22A-22D) can be accurately controlled. Preferably, each probe (20) has a needle-like structure with a number of electrodes (22A-22D) separated by insulative material and is adapted to puncture tissue. Each channel (18) of the splitter (6) has circuitry for interrupting current delivered to the respective channel if a predetermined temperature or current level is exceeded.
摘要:
A delta-sigma modulator circuit comprising: an integrator circuit configured to produce an integrator output signal that represents an integration of an analog input signal, a comparator output signal and a periodic signal; a comparator circuit configured to produce the comparator output signal in response to a comparison of the integrator output signal with a first reference signal; and a periodic signal generation circuit configured to produce the periodic signal.
摘要:
A soft start-up method is provided comprising: producing an initialization signal on a primary winding side of a transformer; using a comparison of the initialization signal with a signal having a value indicative of a current in the primary winding to control a switch operatively disposed between a voltage source and the primary side; transmitting the initialization signal over a galvanically isolating communication medium from the primary side to a secondary winding side of a transformer; at the secondary winding side, comparing a reference voltage signal with a secondary winding output voltage signal; in response to a match between the reference signal and the secondary winding output voltage signal, transmitting a comparison voltage signal over the galvanically isolating communication medium from the secondary side to the primary side; at the primary side, comparing the initialization signal with the transmitted comparison voltage signal; and in response to a match between the initialization signal the and the comparison voltage signal, using the transmitted comparator voltage signal to control the switch.
摘要:
A method, computer program product and processor for quantitatively registering a 2D endoscopic ROI in a 3D volumetric imaging dataset. An endoscopic dataset and a volumetric imaging are registered to a common coordinate system. A 2D endoscopic ROI is generated within the endoscopic imaging dataset. A 3D surface ROI is generated within the volumetric imaging dataset corresponding to the 2D endoscopic ROI, based on a projection of the 2D endoscopic ROI to the registered common coordinate system.
摘要:
A switched-mode power conversion circuit can include a switch control circuit including switch control outputs coupleable to switches included in a bridge network, the switches controllably coupling power input nodes to an isolation transformer according to switch states established by the switch control circuit. A current monitoring circuit can be coupled to the isolation transformer, the current monitoring circuit including an output indicative of a current flowing through a winding of the isolation transformer. A sampling circuit can be coupled to the output of the current monitoring circuit to obtain information indicative of a first current peak during a first sampling duration corresponding to a first current polarity established by the bridge network and a second current peak during a second sampling duration corresponding to an opposite second current polarity established by the bridge network.
摘要:
An electromagnetic system consists of an electric circuit comprising two solenoids wired in series, one mounted either side and proximate to a toroid. Voltage is applied across the toroid and the solenoids in a specific sequence which alters the inductance behaviour of the system, resulting in an inductance gain and no mutual inductance between the toroid and the two solenoids.
摘要:
The present invention is directed to immobilized biologically active entities that retain significant biological activity following mechanical manipulation of a substrate material to which the entities are immobilized.
摘要:
In a method for managing a relationship with a plurality of participants relating to a predetermined subject, each participant is presented a participant data input interface, which includes a participant identification data field, a participant goal indication data field, and a participant experience data field. A targeted participant list, including each participant that input a predetermined goal in the goal indication field, is generated. A past participant list of participants who input into a participant experience data field information indicating having had a desirable experience relating to the predetermined goal is generated and a selected number of participants listed therein are added to the targeted participant list. A targeted marketing contact is transmitted to each participant listed on the targeted participant list.