Abstract:
A lamp device includes a lamp seat defining a first through hole, a lamp main body defining a second through hole, and a holding mechanism. The holding mechanism includes a bolt, a first nut, and a second nut. The bolt includes a head and a spindle connecting to the head. The spindle defines first screw threads at the opposite end from the head and second screw threads adjacent to the first screw threads. The threads per inch of the first screw threads are smaller than that of the second screw threads. The spindle passes though the first through hole and the second through hole to connect with the lamp main body and the lamp seat. The first nut and the second nut are respectively fit over the first screw threads and the second screw threads.
Abstract:
The present invention relates to compositions and methods for treating, characterizing, and diagnosing cancer. In particular, the present invention provides gene expression profiles associated with solid tumor stem cells, as well as novel stem cell cancer markers useful for the diagnosis, characterization, and treatment of solid tumor stem cells.
Abstract:
The present invention relates to compositions and methods for treating, characterizing, and diagnosing cancer. In particular, the present invention provides gene expression profiles associated with solid tumor stem cells, as well as novel stem cell cancer markers useful for the diagnosis, characterization, and treatment of solid tumor stem cells.
Abstract:
The present invention relates to a method of making a powder from apple peel by providing an apple peel, subjecting the apple peel to a phytochemical preservation treatment, drying the treated apple peel, and grinding the dried, treated apple peel to a powder. A powder from apple peel having a phenolic content and a flavonoid content similar to fresh apple peel on a fresh weight basis, where the powder has a water activity of less than 0.30 is also disclosed. The present invention also relates to a method of treating cancer in a patient by administering a powder from apple peel to a patient under conditions effective to treat cancer. Also disclosed is a method of inhibiting proliferation of cancer cells by contacting cancer cells with a powder from apple peel under conditions effective to inhibit proliferation of the cancer cells.
Abstract:
A conditioning circuit and a method of conditioning an average input signal for use with a controller adapted to receive a signal representing a peak input signal. In one embodiment, the conditioning circuit includes: (1) a comparator circuit that compares an average input signal to a reference signal and develops therefrom a comparison signal representing the average input signal, and (2) a switching circuit, coupled to the comparator circuit, that transforms the comparison signal into a format employable by the controller.
Abstract:
For use with a power supply including first and second parallel-coupled converters having interleaved first and second switches, respectively, the first and second switches limited to a duty cycle of less than about 50 percent, a current mode control circuit and a method of current-mode controlling the power supply. In one embodiment, the current mode control circuit, includes: (1) an interconverter current transformer, coupled to an input of the power supply, that senses an input current of the power supply and (2) a controller, coupled to the current transformer, that moderates the duty cycle of the first and second switches as a function of the input current to cause the first and second converters to share an output current of the power supply.
Abstract:
For use in a power supply having a rectifying diode and a snubber circuit that includes a snubber inductor for absorbing a portion of a reverse recovery current associated with the rectifying diode, a circuit and method for resetting the snubber inductor and a power supply employing the circuit and method. In one embodiment, the circuit includes a reset capacitor, coupled to the snubber inductor, that has sufficient capacity to impress a resetting voltage across the snubber inductor. The circuit also includes an activation circuit, coupled between the reset capacitor and an output of the power supply, that creates a voltage differential between the reset capacitor and the output to allow the reset capacitor to attain the resetting voltage.
Abstract:
In a power converter having a power train that includes a power switch and a rectifier for conducting forward currents from the power switch, a circuit for, and method of, moderating a peak reverse recovery current of the rectifier and a power converter employing the circuit or the method. The circuit includes: (1) a snubber circuit coupled to the rectifier and including a snubber inductor, a snubber capacitor and an auxiliary diode, the snubber inductor reducing the peak reverse recovery current of the rectifier and the snubber capacitor recovering energy stored in the snubber inductor and (2) an auxiliary switch, coupled in parallel with the power switch, that is activated when the power switch is transitioned from a conducting state to a non-conducting state to charge the snubber capacitor.
Abstract:
For use in a power supply having a rectifying diode, a snubber circuit for, and method of moderating a reverse recovery current that flows from the rectifying diode as the rectifying diode transitions from a conducting state to a non-conducting state. The snubber circuit includes: (1) a saturable reactor, coupled in electrical series with the rectifying diode and providing a first conductive path for a first portion of the reverse recovery current from the rectifying diode and (2) a saturable reactor resetting circuit, coupled in electrical parallel with the saturable reactor and providing a second conductive path for a second portion of the reverse recovery current from the rectifying diode, the second conductive path reducing the reverse recovery current through the saturable reactor, thereby decreasing a thermal dissipation of the saturable reactor as the rectifying diode transitions from the conducting state to the non-conducting state.
Abstract:
A single stage high frequency push-pull converter with input power factor correction. The boost converter for input power factor correction and the high-frequency push-pull DC/AC inverter are combined into a single stage converter thereby reducing the number of circuit components while at the same time reducing the voltage stress on the high frequency switching transistors of the converter.