Abstract: Systems and methods for broadcasting messages carried on one or more beacon signals are disclosed. A message sharing device may identify a message to be broadcast and may transmit the message to a base station to generate a beacon signal or generate the beacon signal itself based at least in part on the message. The beacon signal may include an indication that the beacon signal carries a message. The beacon signal may be broadcast and may be received by one or more message receiving devices. In some cases, the message may include a link to content accessible via one or more networks, such as the Internet.

Abstract: Techniques are described for determining a direction in which a computing device is being transported by a user who is walking, running, or otherwise moving relative to a direction in which the device is being held. Acceleration data may be collected by accelerometers of the device during a time window, and transformed to determine a rotated acceleration along one or more candidate directions. The rotated acceleration is transformed to a frequency domain, and a peak power is determined within the frequency transformed acceleration data for each candidate direction. The peak powers are compared across multiple candidate directions, and the candidate direction having a higher peak power may be designated as a movement direction of the device relative to the device orientation. A gross movement direction may be determined based on magnetometer data, and may be employed for navigation or other applications.

Abstract: A system and method for confirming a delivery location. A delivery agent equipped with a device, for example, a mobile device, delivers a package to a location. When the package is delivered, the delivery agent triggers a delivery-event on the device, and in response to the delivery-event the device determines an RF fingerprint at the location. The RF fingerprint is stored, and a comparison of the RF fingerprint to previously stored RF fingerprints correlated to particular locations is performed. If the RF fingerprint determined by the first device corresponds to a previously stored RF fingerprint at the correct delivery location, the current delivery location is confirmed as correct.

Abstract: The subject matter disclosed herein relates to distribution data items within geographically distributed databases.

Abstract: A method for transmitting a compressed image via a network, the method comprising: converting (11) the compressed image into a plurality of images, each of the plurality of images having a predetermined resolution level which is less than the original resolution of the image; transforming (12) each of the plurality of images into a data stream; and transmitting (13) each data stream in order according to resolution level, from the lowest resolution level to the original resolution of the image; wherein the compressed image is an image compressed (10) by comparing each image element with a previous image element and; if they are both equal, a first value is recorded; and if they are not both equal, a second value is recorded.

Abstract: An auscultation system aids a clinician's diagnosis of the heart sounds by visually displaying at least an S1 heart sound and an S2 heart sound, and ascertaining an onset of at least one of the heart sounds. A corresponding audio representation of the heart sounds can be provided to the clinician. The auscultation system includes a sensor for sensing heart sounds from at least one chest location of the patient and for transducing the heart sounds into electrical signals. The auscultation system also includes a signal processor for selectively filtering the electrical signals thereby highlighting frequency differences of the heart sounds, and further includes a video display for selectively displaying the selectively filtered electrical heart signals.

Abstract: The subject matter disclosed herein relates to distribution data items within geographically distributed databases.

Abstract: The invention provides a method and apparatus for analysing a heart signal from a beating heart, the method comprising: collecting the heart signal, performing a cluster analysis of the signal to identify the first heart sound and the second heart sound, determining an energy envelope for each of a plurality of regions in the signal, determining the area of each of the energy envelopes, and classifying features in the signal by an analysis incorporating at least the areas, whereby one or more characteristics of the heart can be determined.

Abstract: A method for transmitting a compressed image via a network, the method comprising: converting (11) the compressed image into a plurality of images, each of the plurality of images having a predetermined resolution level which is less than the original resolution of the image; transforming (12) each of the plurality of images into a data stream; and transmitting (13) each data stream in order according to resolution level, from the lowest resolution level to the original resolution of the image; wherein the compressed image is an image compressed (10) by comparing each image element with a previous image element and; if they are both equal, a first value is recorded; and if they are not both equal, a second value is recorded.

Abstract: System and method for compressing data with the use of an Adaptive Progression Pattern and/or Logical Frequency Lexicon. The system and method may also comprise a adaptive learning scheme to update the Adaptive Progression Pattern and/or Logical Frequency Lexicon.

Abstract: An auscultation system aids a clinician's diagnosis of the heart sounds by visually displaying at least an S1 heart sound and an S2 heart sound, and ascertaining an onset of at least one of the heart sounds. A corresponding audio representation of the heart sounds can be provided to the clinician. The auscultation system includes a sensor for sensing heart sounds from at least one chest location of the patient and for transducing the heart sounds into electrical signals. The auscultation system also includes a signal processor for selectively filtering the electrical signals thereby highlighting frequency differences of the heart sounds, and further includes a video display for selectively displaying the selectively filtered electrical heart signals.

Abstract: A tunable auscultation system includes a heart sound acquirer for sensing heart sounds from at least one chest location of the patient. An initial conditioner then conditions the heart sounds through pre-amplification and anti-aliasing. The heart sounds are transduced into electrical signals by a signal processor. The electric heart signals are then tuned by an analysis tool. The analysis tool includes an interaction tuner, a processing tuner and an output tuner. The interaction tuner includes a preset tuning selector and a dynamic range tuning selector. The processing tuner includes a band pass filter and an algorithmic extraction engine which applies extraction algorithms to the electric heart signals, segments them and extracts signals of interest. Signals of interest may be correlated to specific pathologies. The output tuner includes a signal strength indicator, a diagnosis indicator, an overlapping cardiac cycle display and a display configuration engine. A display module provides output.

Abstract: A method for compressing image data of an image wherein a difference between each element and a previous element is calculated (303), the method comprising: comparing (304) the difference with a pre-determined correlation value; if they are equal, a first value is recorded into a bit plane (308), where the pre-determined correlation value is associated with the bit plane (305); and if they are not equal, a second value is recorded into the bit plane (309). Where a first value is recorded in the bit plane, the value of the element is not stored (310), where there is a second value in the bit plane, the value of the element is stored (311). The compressed image can be decompressed using both the bit plane and the bit plane index.

Abstract: A method and system for determining systolic time intervals, by analysis of radio frequency (RF) scatter patterns in conjunction with Electrocardiogram (ECG) data, is provided. An RF emitter is placed on the cardiac patient. The emitter includes two or more transmitting antennas which emit RF radiation into the cardiac patient, resulting in an RF scatter pattern. An RF sensor receives the scattered RF signals. The RF emitted from the antennas will differ spatially with regard to the RF sensor, causing the RF scatter patterns to differ from one another. A signal processor analyzes these differences to identify inhomogeneous structures, and to identify aortic valve motion, including aortic valve opening and closure. An electrocardiogram identifies the onset of the cardiac cycle. Systolic intervals are determined using the onset of the cardiac cycle and the aortic valve motion. Cardiac contractility also is determined by correlation to systolic intervals.

Abstract: A method and system of cardiac contractility analysis is provided. Cardiac contractility may include indices such as ejection fraction (EF) and rate of change in pressure (dP/dt) in a heart. Heart sounds may be measured and calibrated by attenuation. Likewise, a first acoustic peak in the first heart sound (S1), and a second acoustic peak of the second heart sound (S2) may be identified. The first heart sound (S1) may be calibrated by the second heart sound (S2). Amplitudes of calibrated heart sounds may be correlated to cardiac contractility. Electrical activity and acoustics of the heart are measured. The pre-ejection period of the cardiac cycle may be calculated. The left ventricular ejection time of the cardiac cycle may likewise be calculated. Then a ratio of pre-ejection period over left ventricular ejection time may be calculated and correlated to cardiac contractility. Pressure on the acoustic sensor may be used to calibrate acoustic data.

Abstract: An auscultation system includes a transducer for generating an acoustic signal at a transducing location of the subject, and a sensor for receiving an attenuated acoustic signal at a sensing location of the subject. The attenuated signal received at the sensing location is digitized, and may be analyzed in the frequency and/or time domain. The comparison of the digitized attenuated signal against the initial transduced signal allows for the computation of the degree of acoustic attenuation between the transducing and sensing locations. Acoustic attenuation may be utilized to generate an intensity ratio. The ejection fraction of the heart subject may then be computed by correlation to the intensity ratio. Pulse echo methods are also disclosed. The echo transducer is oriented on the subject and generates a series of signal pulses. The return echo on the pulse is then received and a brightness encoded image is produced.

Abstract: A method for an encryption of highly correlated data using a repetition coded compression is disclosed. The method includes the steps of receiving digital data, reshaping the digital data into a digital data matrix, encoding the repetitions of elements in the digital data matrix into a bit-plane index to form a compressed data, adding an encryption layer to mathematically manipulate the compressed data, and storing the compressed data in a storage memory in an encrypted form.

Abstract: A method for compressing image data of an image, comprising: transforming the image data into a bit plane of first and second values; comparing each image element with a previous image element and if they are equal, recording a first value into a bit plane; and if they are not equal, recording a second value into the bit plane; and encoding repeating first and second values in the bit plane into a bit plane index; wherein the compressed image is able to be decompressed using the bit plane index and the bit plane.

Abstract: A heart gating system in which the heart sounds are used to generate the acquisition trigger signals. This is possible because the various heart sound components have characteristics in the temporal domain to allow for distinguishing the S1's and S2's. Hence, the individual heart sound components can be temporally distinguished and gating signals can be generated based on the identified heart sounds such as the S2 heart sound. In addition, S1 also has a frequency spectrum different from that of S2. Hence, in another embodiment of the invention, the frequency characteristics of the heart sounds can be used to distinguish S1 from S2. The combined temporal and frequency characteristics of the heart sounds can also be used to distinguish S1 from S2. In addition, detecting carotid pulses and/or changes in thoracic cavity can also used to better distinguish between S1 and S2.

Abstract: A process and a system for compressing highly correlated image data is provided. The system comprises means for capturing the image, means for converting to digital form, means for reshaping the data, means for encoding the repetitions, means for storing the compressed data and means for retrieving the data. The method comprises steps like capturing the image, converting into digital form, reshaping the data into matrix form, encoding the repetitions into a bit-plane index and encoding data values for storage, storing the compressed data in memory and retrieving the data for decompression. The system and method for compressing image and other highly correlated data is described in the description and illustrated by the way of drawings.