Systems, methods, and computer-readable storage media for analyzing the recorded interactions of users within a shared dataspace, where the shared dataspace is provided by an a synced online content management system. for 120 minutes followed by cooling at a cooling speed of 2\xb0 C. The optical shutter element is not turned OFF at the 64th pulse, but is continuously driven without transmitting to the comparator the standard clock signal of the 64th pulse, which controls the ON time of the optical shutter element.