Systems and methods employ functional instruments to close incisions and wounds using a suture knot in combination with a biocompatible material composition. To improve distant-vision characteristics beyond the low-beam range, the system according to the present invention includes a filter element which is positioned in the optical path of the night-vision system in such a way that it causes an attenuation of the recorded radiation to predefined partial regions of the image sensor. A processor only has permission to access a resource when it owns the lock associated with that resource, and an attempt by a processor to own a lock requires only a single load operation, rather than a traditional atomic load followed by store, such that the processor only performs a read operation and the hardware locking device performs a subsequent write operation rather than the processor. When added to an aqueous stream comprising free cyanide ions, the polysulfide solution reduces corrosion of metal equipment contacted by the stream by converting the free cyanide ions into thiocyanate ions. The structure is then joined to the distal end of a suspension member of the head-arm assembly.