Abstract: A reputation system to evaluate work is disclosed. Answer data for each of one or more unsupervised workers is received. The answer data includes one or more answers each representing a judgment by the worker that reflects on the quality of a given work product. The reputation system determines programmatically, based at least in part on a reputation data of an owner of the work product, the answer data, and a respective reputation data of the respective unsupervised workers, which answers are correct.

Abstract: Using a distributed set of unsupervised workers to produce a work product is disclosed. In some embodiments, a work product is received. A review task to review the work product is provided to a reviewing worker included in the set of unsupervised workers. A result of the review task is received. A determination is made, based at least in part on the review result, whether the work product satisfies an acceptance criteria.

Abstract: An infrared communication system for transmitting a digital bit stream by telemetry in the presence of background radiation wherein each bit in the data stream is represented by a signature set of pulses designating either a binary one or a binary zero. A receiver detecting an infrared signal filters the signal to detect the signature sets of pulses generated by the transmitter. The pulses are transmitted according to a specific communications protocol.

Abstract: An infrared communication system for transmitting a digital bit stream by telemetry in the presence of background radiation wherein each bit in the data stream is represented by a signature set of pulses designating either a binary one or a binary zero. A receiver detecting an infrared signal filters the signal to detect the signature sets of pulses generated by the transmitter. The pulses are transmitted according to a specific communications protocol.

Abstract: A device for the measurement of time at which the physical state of a fluid medium is modified, comprises a vertical cup which contains the fluid and the necessary reagents, and in which a ferromagnetic ball is placed and is driven in rotation by an external magnetic field. The cup has at its lower part an annular travel path for the ball and it comprises a detection device which delivers an electric signal whenever the ball passes in front of it which is associated with a measurement unit determining the variation of the time interval between two consecutive passages of the ball.