Abstract: A needle apparatus (10) for taking a sample from inside of an object comprises a stylet (100), which comprises a longitudinal hollow (102). A transmission fiber arrangement (104) and a reception fiber arrangement (112) are on a bottom (126) of a surface (106) of the hollow (102). A first end (108) of the transmission fiber arrangement (104) is at an access tip (110) of the stylet (100). The transmission fiber arrangement (104) guides optical radiation from a second end (120) of the transmission fiber arrangement (104) to the first end (108) and output the optical radiation therefrom. A first end (114) of the reception fiber arrangement (112) is located at the access tip (110). The reception fiber arrangement (112) receives optical radiation from environment of the access tip (110) and guides the optical radiation therefrom to a second end (122) of the reception fiber arrangement (114) and outputs the optical radiation from there.

Abstract: According to an example aspect of the present invention, there is provided a biopsy needle device comprising a biopsy needle attachment mechanism arranged to mechanically couple a biopsy needle to the biopsy needle device, an actuator mechanism comprising a transducer configured to interconnect electrical signals at one port to mechanical motion at another port, the actuator mechanism configured to transmit flexural vibration to the biopsy needle when the biopsy needle is coupled to the biopsy needle device, a sensor device configured to measure a power of the flexural vibration transmitted to the biopsy needle via the transducer and a reflected power of flexural vibration received by the biopsy needle device from the biopsy needle, and circuitry configured to determine a difference between the power of the flexural vibration transmitted to the biopsy needle and the reflected power of flexural vibration received by the biopsy needle device from the biopsy needle.

Abstract: A method and device for applying a load to a reel in a reel-up of a paper web in which a reel spool and the reel wound around it from the paper web are is loaded against a reeling cylinder with a predetermined loading force supported by a supporting point. The supporting point of the loading force is located in a construction movable at least in the machine direction along with the reel spool. The construction is positioned with respect to a fixed supporting point in accordance with the growth of the reel by a transfer device located between the construction and the supporting point and operating by mechanical power transmission, and/or a carriage at least partly bearing the weight of the reel is used as the construction. The supporting point of the reel is transferred at least in the machine direction by the carriage. The loading force is produced by a force device acting between the supporting point in the moving construction and the reel spool.