Abstract: Methods for providing medical conclusions and support therefore comprises measuring of quantities related to concentrations of at least three different biomarkers of control samples, sending, receiving and storing the same in an archive memory. Stored data is retrieved as a response to a sending and receiving of a request for an adapted medical conclusion model and is processed into the certainty deduction model. The adapted medical conclusion model is processed based on the certainty deduction model, and is outputted and received and medical conclusions made from measurements of samples together with the control samples is provided based on the received adapted medical conclusion model. The certainty deduction model comprises a group model, determined for all control samples, and measurement entity performance characteristics, determined for measurements related to the first measurement entity that are performed less than a predetermined time ago.

Abstract: A percussive rock drill bit includes a plurality of peripheral gauge buttons distributed circumferentially around an axially forwardmost collar at the drill head. The gauge buttons are grouped into pairs such that the central axes of neighboring gauge buttons are aligned substantially parallel to one another and are not centered on a longitudinal axis of the bit. Enlarged flushing grooves are located at the annular collar to provide a segmented collar configuration optimized for flushing cut material rearwardly from the drill bit.

Abstract: A drill string rod and a drill string assembly includes a drill rod and a drill bit. The rod includes a threaded male end and a female end. An axially extending shoulder is provided at the male end and has an axial length greater than an outside diameter of the shoulder to provide a shoulder driven rod exhibiting enhanced guidance to achieve straighter holes and better collaring.

Abstract: A percussive rock drill bit includes a plurality of peripheral gauge buttons distributed circumferentially around an axially forwardmost collar at the drill head. The gauge buttons are grouped into pairs such that the central axes of neighboring gauge buttons are aligned substantially parallel to one another and are not centered on a longitudinal axis of the bit. Enlarged flushing grooves are located at the annular collar to provide a segmented collar configuration optimized for flushing cut material rearwardly from the drill bit.

Abstract: A percussive rock drill bit includes a head provided at one end of a rearwardly projecting skirt. The head has an outer collar that defines, in part, a rearwardly projecting recess formed in the forwardmost region of the head. Peripheral gauge buttons are provided at the collar to surround side and front facing buttons formed at the head recess. The drill bit is effective to provide stabilised cutting to minimise lateral deflection.