1. An antenna for emitting substantially hectometric waves, said antenna comprising an existing vertical structure having a height of at least approximately 10 meters and including at least one electrically conductive member connected to ground, and an essentially electrically conductive electromagnetic excitation wire arrangement disposed at least in part in the vicinity of and outside the structure and connected to an emitter for causing said structure to radiate substantially hectometric waves.
2. An antenna according to claim 1, wherein the electromagnetic excitation wire arrangement comprises a conductive excitation wire substantially extending at least partly outside and along the structure.
3. An antenna according to claim 2, wherein the conductive wire has a first end connected to the emitter via an impedance matching arrangement situated substantially in front of the base of the structure and a second end fixed to the structure.
4. An antenna according to claim 3, comprising a grounding network including conductive wires or strips disposed in a star arrangement and connected to the matching arrangement.
5. An antenna according to claim 2, wherein a first end of the excitation wire is connected to the emitter via an impedance matching arrangement including a variable length conductor.
6. An antenna according to claim 2, wherein one end of the excitation wire is fixed to the structure via an electrical insulator.
7. An antenna according to claim 2, wherein one end of the excitation wire is connected to the conductive member of the structure.
8. An antenna according to claim 2, wherein one end of the excitation wire is connected to the structure via an impedance matching arrangement including a conductor movable along the conductive wire.
9. An antenna according to claim 2, wherein one end of the conductive wire is connected to the conductive member of the structure through a load.
10. An antenna according to claim 2, wherein one end of the excitation wire is connected to a terminating capacitive load consisting of turns of conductive wire around the structure.
11. An antenna according to claim 2, wherein one end of the excitation wire is fixed to the structure through an insulator and supports one or more deployed conductive wires.
12. An antenna according to claim 2, further including a coaxial terminating capacitor coupled with the antenna, the coaxial terminating capacitor including a first portion of the excitation wire extending along the structure and a second portion of the excitation wire extending in a conductive sheath situated inside the structure, the second portion of the excitation wire having a length substantially equal to that of the first portion of the excitation wire.
13. An antenna according to claim 2, wherein the excitation wire comprises two wires in line with each other and separated by a band-pass filter.
14. An antenna according to claim 2, wherein the excitation wire comprises two aligned conductive excitation wires running along the structure and having near ends connected by an insulator and connected to be fed by the emitter through a power balancer.
15. An antenna according to claim 1, wherein the electromagnetic excitation wire arrangement comprises a plurality of conductive excitation wires for different frequency bands and substantially extends at least partly outside and along said structure.
16. An antenna according to claim 1, comprising a non-excited wire arrangement disposed substantially along the structure and having one end isolated from the structure and another end loaded by a reactor connected to said ground.
17. An antenna for emitting substantially hectometric waves, the antenna comprising an existing vertical structure having a height of at least approximately 10 meters and including at least one electrically conductive member connected to ground, and a conductive electromagnetic excitation loop (7a) situated above the ground and outside and near the structure and connected to an emitter for causing the structure to radiate substantially hectometric waves.
18. An antenna according to claim 17, wherein the conductive electromagnetic excitation loop extends in a substantially vertical plane and has one side substantially parallel to the structure.
19. An antenna according to claim 17, wherein the conductive electromagnetic excitation loop is situated substantially at the level of the base or the middle of the structure.
20. An antenna according to claim 17, wherein the excitation loop (7a) has a perimeter of a few meters.
21. An antenna according to claim 17, further including a plurality of conductive loops for different frequency bands situated above the ground and outside and near the structure.
22. An antenna for emitting substantially hectometric waves, said antenna comprising an existing vertical structure having a height of at least approximately 10 meters and including at least one electrically conductive member connected to ground, and a conductive electromagnetic exciting tube substantially extending at least partly outside and along said structure and connected to an emitter for causing the structure to radiate substantially hectometric waves.
23. An antenna for emitting substantially hectometric waves, the antenna comprising an existing vertical structure having a height of at least approximately 10 meters and including at least one electrically conductive member connected to ground, and an electromagnetic excitation cage including a plurality of parallel conductive wires substantially extending at least partly outside and along the structure and connected to an emitter for causing the structure to radiate substantially hectometric waves.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method, comprising:
maintaining a plurality of data arrays coupled to a plurality of nodes;
broadcasting, by local nodes corresponding to the plurality of nodes, information about the plurality of data arrays to other nodes of plurality of nodes; and
determining based on the broadcasted information, by a director node of the plurality of nodes, which data arrays of the plurality of data arrays are a current set of global metadata arrays comprising a primary, a secondary, and a tertiary data arrays, wherein the director node synchronizes global metadata between the primary, the secondary, and the tertiary data arrays, wherein each of the primary, the secondary, and the tertiary data arrays have a boot sector that stores pointer records pointing to the current set of global metadata arrays, and wherein boot sectors of other data arrays besides the global metadata arrays do not store pointer records pointing to the current set of global metadata arrays.
2. The method of claim 1, the global metadata includes metadata for system configuration.
3. The method of claim 1, the method further comprising:
maintaining, in the boot sector of each of the primary, secondary, and tertiary data arrays a reconfiguration count.
4. The method of claim 1, the method further comprising:
determining a node of the plurality of nodes to be the director node;
collecting the information about each of the data arrays by the director node; and
directly or indirectly reading via local and remote adapters, by the director node, a boot sector of each of the plurality of data arrays to determine which of the plurality of data arrays has a pointer record in the boot sector pointing to potential global metadata arrays.
5. The method of claim 4, the method further comprising:
determining, boot sectors with highest reconfiguration counts to determine three arrays of the plurality of data arrays that are configured as the current set of global metadata arrays.
6. The method of claim 1, wherein each data array of the plurality of data arrays is owned by at least one but not by all of the plurality of nodes.
7. A system, wherein a plurality of data arrays are coupled to a plurality of nodes via a plurality of adapters, the system comprising:
a memory; and
a processor coupled to the memory, wherein the processor performs operations, the operations comprising
broadcasting, by local nodes corresponding to the plurality of nodes, information about the plurality of data arrays to other nodes of plurality of nodes; and
determining based on the broadcasted information, by a director node of the plurality of nodes, which data arrays of the plurality of data arrays are a current set of global metadata arrays comprising a primary, a secondary, and a tertiary data arrays, wherein the director node synchronizes global metadata between the primary, the secondary, and the tertiary data arrays, wherein each of the primary, the secondary, and the tertiary data arrays have a boot sector that stores pointer records pointing to the current set of global metadata arrays, and wherein boot sectors of other data arrays besides the global metadata arrays do not store pointer records pointing to the current set of global metadata arrays.
8. The system of claim 7, the global metadata includes metadata for system configuration.
9. The system of claim 7, the operations further comprising:
maintaining, in the boot sector of each of the primary, secondary, and tertiary data arrays a reconfiguration count.
10. The system of claim 7, the operations further comprising:
determining a node of the plurality of nodes to be the director node;
collecting the information about each of the data arrays by the director node; and
directly or indirectly reading via local and remote adapters, by the director node, a boot sector of each of the plurality of data arrays to determine which of the plurality of data arrays has a pointer record in the boot sector pointing to potential global metadata arrays.
11. The system of claim 10, the operations further comprising:
determining, boot sectors with highest reconfiguration counts to determine three arrays of the plurality of data arrays that are configured as the current set of global metadata arrays.
12. The system of claim 7, wherein each data array of the plurality of data arrays is owned by at least one but not by all of the plurality of nodes.
13. A computer program product, the computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured to perform operations, the operations comprising:
maintaining a plurality of data arrays coupled to a plurality of nodes;
broadcasting, by local nodes corresponding to the plurality of nodes, information about the plurality of data arrays to other nodes of plurality of nodes; and
determining based on the broadcasted information, by a director node of the plurality of nodes, which data arrays of the plurality of data arrays are a current set of global metadata arrays comprising a primary, a secondary, and a tertiary data arrays, wherein the director node synchronizes global metadata between the primary, the secondary, and the tertiary data arrays, wherein each of the primary, the secondary, and the tertiary data arrays have a boot sector that stores pointer records pointing to the current set of global metadata arrays, and wherein boot sectors of other data arrays besides the global metadata arrays do not store pointer records pointing to the current set of global metadata arrays.
14. The computer program product of claim 13, the global metadata includes metadata for system configuration.
15. The computer program product of claim 13, the operations further comprising:
maintaining, in the boot sector of each of the primary, secondary, and tertiary data arrays a reconfiguration count.
16. The computer program product of claim 13, the operations urther comprising:
determining a node of the plurality of nodes to be the director node;
collecting the information about each of the data arrays by the director node; and
directly or indirectly reading via local and remote adapters, by the director node, a boot sector of each of the plurality of data arrays to determine which of the plurality of data arrays has a pointer record in the boot sector pointing to potential global metadata arrays.
17. The computer program product of claim 16, the operations further comprising:
determining, boot sectors with highest reconfiguration counts to determine three arrays of the plurality of data arrays that are configured as the current set of global metadata arrays.
18. The computer program product of claim 13, wherein each data array of the plurality of data arrays is owned by at least one but not by all of the plurality of nodes.