Abstract: Disclosed is a method of analysis of a mixture of biological and/or chemical components that entails spatially arranging a chosen component attached to magnetic particles, exposing the particles to a magnetic field, and recording a magnetic induction signal, from which the content of the analyte in the mixture is judged; this includes grouping the chosen component in a probe volume, making the magnetic field alternating, pre-setting its spectrum, at least, at two frequencies, and recording the signal at a frequency, which is a linear combination of these frequencies, during the exposure of the magnetic particles to the field.

Abstract: Disclosed is a method of analysis of a mixture of biological and/or chemical components that entails spatially arranging a chosen component attached to magnetic particles, exposing the particles to a magnetic field, and recording a magnetic induction signal, from which the content of the analyte in the mixture is judged; this includes grouping the chosen component in a probe volume, making the magnetic field alternating, pre-setting its spectrum, at least, at two frequencies, and recording the signal at a frequency, which is a linear combination of these frequencies, during the exposure of the magnetic particles to the field.

Abstract: A device for arresting spark and ash issuing from, and precisely controlling the ventilation of and temperature inside, a heat source-containing vessel such as a cooking grill, stove, oven, cooker, fireplace, heater, or firebox. The device comprises a spark arrestor assembly including a base plate, a cover plate, and a spark arrestor. The base plate defines an opening. The cover plate and spark arrestor are slidably mated in two channels formed in the base plate around the opening. The cover plate and spark arrestor may be adjusted to extend across or only partway across the opening as selected by a user of the device. Tabs are provided on the cover plate and spark arrestor for easy adjustment thereof. Tabs in the base plate are positioned to define a range of slidable motion of the cover plate and spark arrestor.

Abstract: Modeling systems are enhanced by combining physical and virtual modeling techniques to create a hybrid modeling system. Manipulation of physical models results in updated real-time physical characteristics being provided to a virtual model. User manipulation of virtual model characteristics can also be provided and implemented on the physical model using actuators and control devices. The invention also enables multiple users to simultaneously construct and manipulate different portions of a physical model, e.g., of an atom or a molecule, and to have the results of these manipulations provided to a computer system for computational analysis. The results of such analyses can be electronically returned to the physical model, e.g., wirelessly.

Abstract: Systems and methods to determine timebase and timing (i.e., time sync) of received signals in RFID systems. Multiple matched filters corresponding to multiple timebases are used to receive the preambles of signals received from RFID tags. The multiple matched filters define a range of expected timebases of the received signals. The matched filter with the maximum output signal peak is used to derive the timebase and timing of the received signal. Viterbi techniques can be used in determining the timebase and timing to incorporate a portion of the data signal in addition to the preamble. Reconfigurable matched filters can be used so that after a preliminary timebase is determined as described above, the matched filters can be reconfigured to define a new smaller range centered about the preliminary timebase. This allows the timebase to be determined with finer resolution when another preamble portion is received.

Abstract: A Radio Frequency IDentification (RFID) circuit for use in an RFID tag includes a FET semiconductor device that is coupled to antenna connections. The device can be part of a modulator, a demodulator, or a rectifier. A designated region for a first terminal (such as a drain or a source) is formed as an island completely surrounded by a gate structure, which minimizes parasitic effects. One or more designated regions for a second terminal (such as a source or a drain) outside the gate structure complete the FET device.