Abstract: A computer-implemented method for efficiently estimating the number of unique elements in a collection of elements comprises generating, via hash logic, hash values associated with the elements. The hash values specify bit positions within an array of bits. Hash values output from the hash logic conform to a geometric distribution such that bit positions of the array of bits corresponding to lower orders bits are more likely to be generated than bit positions corresponding to higher-order bits. Bits of the array of bits corresponding to the bit positions are set. The number of bits of the array of bits that are set is counted. Estimation logic estimates the number of unique elements of the collection of elements as a function of the number of bits of the array of bits that are set.

Abstract: Systems and methods disclosed herein provide a geo-targeted online reservation system that ensures authenticity of customer devices requesting reservations by generating reservations only if threshold authentication conditions are satisfied. For example, a computing device registered with a server system receives inputs for requesting a reservation of a limited release product and for configuring the product. To authenticate the computing device, the server device transmits an electronic message to the computing device requesting the computing device to respond. A response to the message is one threshold authentication condition for generating the reservation. Upon determining that one or more threshold authentication conditions are satisfied, the server device generates a reservation for the product.

Abstract: An internet service provider (ISP) is configured to analyze data sent by a user to determine a subscriber account associated with the data and a user associated with the data. A database is then queried to determine the number of users of the subscriber account, with a number above a threshold indicating a likely theft of service. This automatic process is accompanied by automated messaging to the user with information as to the measures taken and remedial options. The messaging may be different dependent on whether the user is deemed to be an authorized user having subscriber account administration rights.

Abstract: A computer-implemented method for efficiently estimating the number of unique elements in a collection of elements comprises generating, via hash logic, hash values for each element of the collection of elements. The method further comprises specifying, in a sketch-frequency table, a set of discrete statistical values associated with the hash values and, for each discrete statistical value of the set of discrete statistical values, information indicative of a frequency at which binary representations of the hash values are associated with the discrete statistical value. The cardinality of the collection of elements is estimated based on the sketch-frequency table.

Abstract: A computer-implemented method for efficiently estimating the number of unique elements in a collection of elements comprises generating, via hash logic, hash values associated with the elements. The hash values specify bit positions within an array of bits. Hash values output from the hash logic conform to a geometric distribution such that bit positions of the array of bits corresponding to lower orders bits are more likely to be generated than bit positions corresponding to higher-order bits. Bits of the array of bits corresponding to the bit positions are set. The number of bits of the array of bits that are set is counted. Estimation logic estimates the number of unique elements of the collection of elements as a function of the number of bits of the array of bits that are set.

Abstract: The present invention provides engineered ketoreductase and phosphite dehydrogenase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase and phosphite dehydrogenase enzymes, as well as polynucleotides encoding the engineered ketoreductase and phosphite dehydrogenase enzymes, host cells capable of expressing the engineered ketoreductase and phosphite dehydrogenase enzymes, and methods of using the engineered ketoreductase and phosphite dehydrogenase enzymes to synthesize a chiral catalyst used in the synthesis of antiviral compounds, such as nucleoside inhibitors. The present invention further provides methods of using the engineered enzymes to deracemize a chiral alcohol in a one-pot, multi-enzyme system.

Abstract: A device attachable to an aerial vehicle that incorporates electronics to control sensor position data and verify safety of aerial vehicle landing area. The device may be easily attached to an existing aerial vehicle. The device monitors sensor data from one or more distance measuring sensors and pressure sensors to set an angle of incidence for the distance measuring sensors. This pressure sensor derived angle setting allows for a continual data mapping of the aerial vehicles landing area to enhance and improve the landing zone.

Abstract: An apparatus is provided which may be selectively used in a variety of different ways. In one example the apparatus may be attached to one or more preexisting optical accessories to allow a user to view external environmental information concurrently when looking through the ocular lens of an optical device. Advantageously, such an implementation may permit a user to effectively obtain environmental data without moving away from an optical device. In another example, an optical system may be used to selectively attach an external device to an optical device to transmit environmental data recorded by the external device in order to superimpose an image through an ocular lens to be displayed concurrently with a target scene.

Abstract: A USB plug in vehicle air freshener for dispensing a fragrance in a host vehicle. The vehicle air freshener has an elongated freshener body that includes on its exterior a USB jack for plugging into a USB plug on the host vehicle at one end and a vent as the other end, as well as an exterior manual activating switch. On the interior, the freshener body includes a fragrance that hold a fragrant material to be dispensed, a heating element for vaporizing the fragrant material so that it may exit through the vent, and an internal control system that allows the dispensing of fragrance to be controlled wirelessly by a separate device, such as a computer system on the host vehicle.

Abstract: A time-of-flight laser distance device includes a laser transmitter, a laser pulse return detector to receive reflected laser pulses, and comparators with respective first and second trip levels. A preliminary distance to a target is based on a linear ramp as a function of lapsed time from laser pulse generation through an effective time period wherein an associated return pulse is detected. Time-of-flight values associated with a leading edge of the return pulse are obtained at each of the first and second trip levels. A time difference is determined between the obtained values, and a correction factor is applied with respect to the preliminary measured distance based on the determined time difference. A dual ADC may be used wherein the leading edge of the return pulse is calculated by measuring a slope associated with the time-of-flight values and extrapolating a slope origin to a zero crossing point.

Abstract: A system for monitoring a machine includes first and second mobile units. The first mobile unit includes an emitter, a clock in communication with the emitter, and a sensor in communication with the clock. The second mobile unit includes a detector, a clock in communication with the detector, and a sensor in communication with the clock. The detector of the second mobile unit is configured to detect a signal from the emitter of the first mobile unit, and the clocks in the first and second mobile units are configured to be synchronized in response to the detection of the signal.

Abstract: A system for monitoring a machine includes first and second mobile units. The first mobile unit includes an emitter, a clock in communication with the emitter, and a sensor in communication with the clock. The second mobile unit includes a detector, a clock in communication with the detector, and a sensor in communication with the clock. The detector of the second mobile unit is configured to detect a signal from the emitter of the first mobile unit, and the clocks in the first and second mobile units are configured to be synchronized in response to the detection of the signal.

Abstract: Data is transmitted from a portable handheld device (“HHD”) at a remote site to a control facility using wireless data transmission. In response, the control facility creates and sends a measurement instruction or command to the HHD. The command sent to the HHD can be based at least in part on the data previously received from the HHD.