Abstract: Provided are methods for switching active speakers during a video conferencing session. An image of an active speaker in a video conference is provided for presentation in a main display area of a display screen, where the active speaker is one of a plurality of users participating in the video conference over a network. When, a new active speaker out of the users participating in the video conference is detected, resolutions of available video streams received for each of the users are determined. In response to determining that the resolution of the video stream received for the new active speaker is below a threshold resolution, the image of the active speaker continues to be provided for presentation in the main display area until a predetermined period of time has elapsed.

Abstract: The present invention provides a method of producing a multilayer barrier structure in a solid oxide cell stack, comprising the steps of: —providing a metal interconnect; —applying a first metal oxide layer on said metal interconnect; —applying a second metal oxide layer on top of said first metal oxide layer; —applying a third metal oxide layer on top of said second metal oxide layer; —forming a solid oxide cell stack comprising said metal interconnect having said metal oxide layers thereon; and —reacting the metal oxide in said first metal oxide layer with the metal of said metal interconnect during the SOC-stack initialization, and a solid oxide stack comprising an anode contact layer and support structure, an anode layer, an electrolyte layer, a cathode layer, a cathode contact layer, a metallic interconnect, and a multilayer barrier structure which is obtainable by the above method and through an initialization step, which is carried out under controlled conditions for atmosphere composition and current