Abstract: A stratospheric airship includes a nonrigid balloon equipped with a solar generator arranged on the upper part of the nonrigid balloon intended to be illuminated in flight by the sun, the airship comprising: at least one device for managing the position of the centre of gravity of the airship; at least one device for stabilizing the attitude of the airship; and a module for the coupled control of the devices, configured to control the airship, when the speed of travel of the airship with respect to the surrounding air is below a first threshold (S1) and/or the temperature of the solar generator is above a second threshold (S2), in such a way that it rotates by substantially half a turn about its longitudinal axis (AL), so as to protect the solar generator from illumination by the sun.

Abstract: A balloon equipped with photovoltaic means exhibiting an active face intended to receive solar rays and comprising an envelope, characterized in that the envelope comprises at least: a first zone transparent to solar rays; a second reflecting zone for said solar rays; a third zone comprising said photovoltaic means, the active face of which is directed toward the inside of said envelope; the second and third zones being positioned and cooperating in such a way as to reflect the solar rays in the direction of said third zone.

Abstract: A balloon comprises an envelope containing a lifting gas and a concentrated solar radiation solar generator. The solar generator includes a reflector, one or two arrays of photovoltaic solar cells forming a first active face directed towards the reflector and a second active face directed towards the exterior of the envelope of the balloon. The reflector, the first active face and the second active face of the array of photovoltaic cells are configured so as to ensure the first active face and the second active face of the array both generate electrical power provided that the rollwise solar misalignment of the reflector is smaller than or equal to 10 degrees in absolute value.

Abstract: Automated topology formation in a dynamic distributed environment. The automatic topology formation includes receiving by an application of a first entity having an initial topology role, topology information from a master node. The first entity has an initial topology role and the received topology information varies based the initial topology role. A local topology representation information is derived from the received topology information wherein the local topology representation information comprises any one of: a first entity topology role as any one of a not-a-node, root node, a prime node or a leaf node for the topology; a list of entities that are parents of the first entity in the topology, or a list of entities that are subordinates to the first entity in the topology; and setting the local topology representation information at the first entity.

Abstract: A method for automated topology formation in a dynamic distributed environment includes configuring a master node in an active topology having nodes and intercommunication paths between the nodes. The master node includes an automated topology formation application including a predefined topology policy definition and a representation of the active topology. The master node receives a communication from an entity, the communication including a topology event notification indicating an event affecting the active topology. Using the automated topology formation application, it is determined that the topology event notification affects a topology portion of the active topology and, based on the topology event notification, the representation of the affected topology portion of the active topology is modified according to the predefined topology policy definition.

Abstract: Automated topology formation in a dynamic distributed environment. The automatic topology formation includes receiving by an application of a first entity having an initial topology role, topology information from a master node. The first entity has an initial topology role and the received topology information varies based the initial topology role. A local topology representation information is derived from the received topology information wherein the local topology representation information comprises any one of: a first entity topology role as any one of a not-a-node, root node, a prime node or a leaf node for the topology; a list of entities that are parents of the first entity in the topology, or a list of entities that are subordinates to the first entity in the topology; and setting the local topology representation information at the first entity.

Abstract: A method for information gathering and aggregation in a dynamic distributed environment includes obtaining topology information identifying a plurality of topology nodes of the topology and communication paths of the plurality of topology nodes. An information services policy is obtained, and information gathering directives are determined for information gathering nodes included in the plurality of topology nodes and sent thereto, based on the obtained topology information and the obtained information services policy. Information aggregating directives are also determined for information aggregating nodes included in the plurality of topology nodes and sent thereto, based on the obtained topology information and the obtained information services policy.

Abstract: A method for automated topology formation in a dynamic distributed environment includes configuring a master node in an active topology having nodes and intercommunciation paths between the nodes. The master node includes an automated topology formation application including a predefined topology policy definition and a representation of the active topology. The master node receives a communication from an entity, the communication including a topology event notification indicating an event affecting the active topology. Using the automated topology formation application, it is determined that the topology event notification affects a topology portion of the active topology and, based on the topology event notification, the representation of the affected topology portion of the active topology is modified according to the predefined topology policy definition.