Abstract: An electrotactile apparatus has an electrode-array unit and a driver unit for generating a haptic feedback to a user. The electrode-array unit uses electrodes to electro-stimulate the user's skin with pulsed voltage signals generated by the driver unit, inducing excitation currents flowing in the user to generate the haptic feedback. The driver unit is self-powered or wirelessly powered for supporting untethered electrotactile stimulation to the user. A common counter electrode installed on the driver unit contacts the user's skin and collects the excitation currents returned from the user. Advantageously, the common counter electrode is located on an outer surface of the driver unit and the driver unit is substantially flexible, facilitating the common counter electrode to seamlessly contact the user's skin for achieving a stable electrode-skin interface while positioning the driver unit as a whole on the user's skin to provide untethered virtual touching experience to the user.

Abstract: An integrated device for rapid detection of SARS-CoV-2 is disclosed. The integrated device includes a front-end system, a back-end system, and a microfluidic channel. The front-end system includes a detection region and a control region. The detection region and the control region have similar structures, each including an interdigital electrode and a graphene film. The microfluidic channel is arranged to cover the detection region so as to allow the interdigital electrode of the detection region to be exposed to the breath sample. The graphene film of the detection region has a surface resistance higher than that of the graphene film of the control region when the detection region is exposed to a selected virus. The back-end system is configured to detect and compare the surface resistance of the graphene films of the detection region and the control region for determining whether the selected virus is present in the breath sample.

Abstract: This invention relates to methods and systems for displaying geological formation data obtained through well logging in the technical field of petroleum engineering. In one embodiment of this invention, two or more cylindrical surfaces are provided each representing a depth of investigation. The cylindrical surfaces can be dissected into different sectors along azimuths of interest to the human operator. Images of formation information data are attached to (or exposed by) cylindrical surfaces and wings exposed by dissection. Each sector can be displayed individually or together with other sectors so that the human operator can easily analyze the results. Further, the systems and methods can be used to display not only raw well logging data or processed well logging data, but also interpretations of the analysis so that a person unfamiliar with well logging analysis can easily comprehend the results of the analysis.

Abstract: This invention relates to methods and systems for displaying geological formation data obtained through well logging in the technical field of petroleum engineering. In one embodiment of this invention, two or more cylindrical surfaces are provided each representing a depth of investigation. The cylindrical surfaces can be dissected into different sectors along azimuths of interest to the human operator. Images of formation information data are attached to (or exposed by) cylindrical surfaces and wings exposed by dissection. Each sector can be displayed individually or together with other sectors so that the human operator can easily analyze the results. Further, the systems and methods can be used to display not only raw well logging data or processed well logging data, but also interpretations of the analysis so that a person unfamiliar with well logging analysis can easily comprehend the results of the analysis.