Methods, devices, and systems that aggregate and retrieve network sensor data. In one approach, an exemplary method includes receiving a plurality of instances of correlated sensor data from a plurality of remote data storages, each instance of sensor data respectively correlating to an occurrence. In another approach, an exemplary method includes receiving from an input-selector an input selection corresponding to a target-occurrence having at least one representative feature, and searching stored sensor data for sensor data correlating to the target-occurrence.

Aggregation and retrieval of network sensor data

A pulse density modulation circuit has a counter which produces a most significant bit through a least significant bit output based on a clock input. The circuit also has a comparator with two sets of most significant bit through least significant bit inputs that produces an output based on a comparison of the two sets of inputs. The first set of comparator most significant bit through least significant bit inputs receives respectively a most significant bit through a least significant bit of an input reference signal. The second set of comparator most significant bit through least significant bit inputs receives the counter most significant bit through least significant bit output in a non-sequential bit order. The non-sequential bit order can be a bit reversed order wherein the counter most significant bit through least significant bit output are respectively connected to the comparator least significant bit through most significant bit input. The circuit may further filter the comparator output to provide a resultant analog output signal.

Pulse density modulation circuit (parallel to serial) comparing in a nonsequential bit order

In some embodiments, the present invention is directed to a first mote, at least including: a first-mote directional antenna; wherein the first-mote directional antenna comprises a plurality of first antennas elements; ad hoc programmed computer processor which is configured to perform at least causing to establish a first communication link between the first mote and a second mote, based on a first direction; where the first direction corresponds to a first state of the plurality of first antennas elements; monitoring, in real time, the initial communication link data; determining, based on the initial communication link data, a second; selectively varying an antenna property operatively associated with the plurality of first antennas elements to establish a second state, corresponding to the second direction; and causing to establish a second communication link between the first mote and the second mote, based on the second state.

Mote networks using directional antenna techniques

Methods, devices, and systems that store occurrence-data gathered by a distributed sensor network. In an approach, an exemplary method includes receiving a target-occurrence selection, storing a parameter sensed by a sensor of the network in a sensor data set, and searching the sensor data set for data correlating to the target-occurrence. Data correlating to the target-occurrence is stored, and the sensed parameter is deleted from the data set. In another approach, an exemplary system includes a data storage device, a computing device operable to communication with the distributed sensors, and instructions implementing the above method.

Occurrence data detection and storage for generalized sensor networks

An electric circuit includes: a reference signal generation circuit that generates a reference signal based on a first oscillation signal that is an oscillation signal of a first oscillation circuit that vibrates a first vibrator; and a counter circuit that counts a second oscillation signal that is an oscillation signal of a second oscillation circuit that vibrates a second vibrator based on the reference signal, and outputs a count signal, wherein the count signal is a change of the count value in the second oscillation signal.

Electric circuit, sensor system equipped with the electric circuit, and sensor device equipped with the electric circuit

Audio signals are scrambled by single side band modulating with a modulation signal carrier having a frequency lying within the audio frequency band so that the signals are frequency translated upward. The scrambled audio signals are descrambled after broadcasting or recording/reproducing using a substantially identical modulation carrier signal to restore the original audio signals. Security is enhanced by varying the frequency of the modulation carrier signal in a pseudo random manner in response to start (ACLK) and rate (A0, A1) control signals. The control signals accompany the scrambled audio signals and are used during the descrambling process to aid in the generation of the descrambling carrier modulation signal. The frequency translation technique reduces the adverse effect of wow and flutter frequency fluctuations introduced during recording and reproduction of the audio signals (as compared to systems using frequency spectrum inversion), and also reduces the adverse affect of high frequency headroom crashing experienced in pre-emphasis broadcasting and equalizer recording applications.

Audio scrambling system using in-band carrier

A system and method for generating a variable frequency sine wave carrier signal operates in response to a start signal and a rate signal. The system includes a first counter which drives a second counter via an EPROM; the second counter is clocked by the output of an oscillator. The output of the second counter is converted by filtering to the desired sine wave signal.

Ronald Quan

Papers

Audio scrambling system using in-band carrier

Variable frequency sine wave carrier signal generator