The invention relates to a method for controlling a wind power installation which has a rotor having rotor blades that are adjustable in terms of their blade angle, and having a rotor diameter, wherein the rotor is able to be operated at a variable rotor rotating speed; and a region in which the rotor blades move forms a danger zone for birds and bats, the method comprising the following steps: checking whether a bird or bat approaching the wind power installation is an endangered bird and if an endangered bird has been identified, detecting a bird position as the current position of the endangered bird identified; and controlling the rotor rotating speed as a function of the bird position in relation to the wind power installation; wherein the rotor rotating speed is reduced in multiple stages or continuously as the distance of the bird position from the wind power installation decreases. The invention is intended to propose a solution in which a wind power installation poses the lowest possible risk to endangered species of birds and bats while at the same time offering the best possible yield. The intention is to at least propose an alternative to the solutions known to date.

A fluid stream turbine includes a flywheel rotatably mounted to a central axis post and having a plurality of curved blades, and a housing rotatable mounted to the central axis post, the housing including a side wall configured to cover a portion of a radial periphery of the flywheel, a top wall configured to cover a portion of a top side of the flywheel, a rudder disposed on the top wall and configured to cause the housing to rotate such that a front of the housing always faces directly into a fluid stream, a first diverter scoop disposed at the front of the housing and configured to direct a first portion of the fluid stream toward the plurality of curved blades, and a second diverter scoop disposed at a rear of the housing and configured to direct a second portion of the fluid stream toward the plurality of curved blades.

The invention relates to a method for controlling a wind power installation which has a rotor having rotor blades that are adjustable in terms of their blade angle, and having a rotor diameter, wherein the rotor is able to be operated at a variable rotor rotating speed; and a region in which the rotor blades move forms a danger zone for birds and bats, the method comprising the following steps: checking whether a bird or bat approaching the wind power installation is an endangered bird and if an endangered bird has been identified, detecting a bird position as the current position of the endangered bird identified; and controlling the rotor rotating speed as a function of the bird position in relation to the wind power installation; wherein the rotor rotating speed is reduced in multiple stages or continuously as the distance of the bird position from the wind power installation decreases. The invention is intended to propose a solution in which a wind power installation poses the lowest possible risk to endangered species of birds and bats while at the same time offering the best possible yield. The intention is to at least propose an alternative to the solutions known to date.

Organism monitoring systems and organism monitoring devices are described. According to one aspect, an organism monitoring system includes an organism monitoring device configured to be associated with an organism, the device comprising control circuitry configured to generate a binary sequence, and an antenna coupled with the control circuitry and configured to transmit a wireless signal externally of the organism according to the generated binary sequence, a plurality of receivers positioned at different locations and configured to receive the wireless signal transmitted by the organism monitoring device at different moments in time, and wherein each of the receivers is configured to output data regarding the wireless signal received at the individual receiver, and a computing system configured to receive and use the data regarding the wireless signal received by the receivers to determine a location of the organism monitoring device and the organism.

A fluid stream turbine includes a flywheel rotatably mounted to a central axis post and having a plurality of curved blades, and a housing rotatable mounted to the central axis post, the housing including a side wall configured to cover a portion of a radial periphery of the flywheel, a top wall configured to cover a portion of a top side of the flywheel, a rudder disposed on the top wall and configured to cause the housing to rotate such that a front of the housing always faces directly into a fluid stream, a first diverter scoop disposed at the front of the housing and configured to direct a first portion of the fluid stream toward the plurality of curved blades, and a second diverter scoop disposed at a rear of the housing and configured to direct a second portion of the fluid stream toward the plurality of curved blades.