Abstract: The technology disclosed relates to a system that provides exactly-once processing of stream data. The system includes a queue manager which receives a stream of data. The system establishes aggregation intermediation checkpoints during processing of the received data. To do this, the system partitions delivery of the data stream at offsets, saves partition demarcation offsets at the end of processing windows, and saves intermediate aggregation results to a distributed file system with a window identifier (abbreviated ID) that correlates the offsets and the aggregation results. At each checkpoint, the intermediate aggregation results can be initially saved on at least one write-ahead log (abbreviated WAL) on the distributed file system and, post-saving, persisted to storage in accordance with a fault tolerance scheme.

Abstract: The technology disclosed relates to a system that provides exactly-once processing of stream data. The system includes a queue manager which receives a stream of data. The system establishes aggregation intermediation checkpoints during processing of the received data. To do this, the system partitions delivery of the data stream at offsets, saves partition demarcation offsets at the end of processing windows, and saves intermediate aggregation results to a distributed file system with a window identifier (abbreviated ID) that correlates the offsets and the aggregation results. At each checkpoint, the intermediate aggregation results can be initially saved on at least one write-ahead log (abbreviated WAL) on the distributed file system and, post-saving, persisted to storage in accordance with a fault tolerance scheme.

Abstract: The technology disclosed relates to a system that provides exactly-once processing of stream data. The system includes a queue manager which receives a stream of data. The system establishes aggregation intermediation checkpoints during processing of the received data. To do this, the system partitions delivery of the data stream at offsets, saves partition demarcation offsets at the end of processing windows, and saves intermediate aggregation results to a distributed file system with a window identifier (abbreviated ID) that correlates the offsets and the aggregation results. At each checkpoint, the intermediate aggregation results can be initially saved on at least one write-ahead log (abbreviated WAL) on the distributed file system and, post-saving, persisted to storage in accordance with a fault tolerance scheme.

Abstract: An insulation package comprising a layer of material having a cellular structure disposed between a first layer of high-strength polymeric fabric and a second layer of high-strength polymeric fabric. The insulation provides protection for critical fluid systems, such as fuel, hydraulic, electrical, pneumatic, thermal, and mechanical systems from high-energy projectiles such as fragments from the disintegration of high-speed turbines and engines.

Abstract: A system and method for minimizing the effects of non-uniform dielectric properties includes forming traces on printed circuit boards (PCB) where the fibers within the printed circuit boards are non-rectangular with respect to the rectangular edges of the circuit board. The orientation of the traces with respect to the fibers substantially minimizes the effects of non-uniform dielectric properties of the PCB.

Abstract: An insulation package comprising a layer of material having a cellular structure disposed between a first layer of high-strength polymeric fabric and a second layer of high-strength polymeric fabric. The insulation provides protection for critical fluid systems, such as fuel, hydraulic, electrical, pneumatic, thermal, and mechanical systems from high-energy projectiles such as fragments from the disintegration of high-speed turbines and engines.

Abstract: An hydraulic power assembly 10 is provided, including at least one primary hydraulic power unit 20 supplying hydraulic fluid 30 to a hydraulic system 34, and a contingency hydraulic power unit 50 utilizing the orbiter's helium storage tank 52 to power a contingency hydraulic drive 56 to supply hydraulic fluid 30 from a contingency hydraulic fluid reserve 58 to the hydraulic system 34 during peak loading conditions.

Abstract: An hydraulic power assembly 10 is provided, including at least one primary hydraulic power unit 20 supplying hydraulic fluid 30 to a hydraulic system 34, and a contingency hydraulic power unit 50 utilizing the orbiter's helium storage tank 52 to power a contingency hydraulic drive 56 to supply hydraulic fluid 30 from a contingency hydraulic fluid reserve 58 to the hydraulic system 34 during peak loading conditions.

Abstract: A leak detection system for use with a fluid conducting system in a vacuum environment, such as space, is described. The system preferably includes a mesh-like member substantially disposed about the fluid conducting system, and at least one sensor disposed within the mesh-like member. The sensor is capable of detecting a decrease in temperature of the mesh-like member when a leak condition causes the fluid of the fluid conducting system to freeze when exposed to the vacuum environment. Additionally, a signal processor in preferably in communication with the sensor. The sensor transmits an electrical signal to the signal processor such that the signal processor is capable of indicating the location of the fluid leak in the fluid conducting system.

Abstract: Spacers (10) with a cell-formed lattice-work for retaining parallel elongated elements such as fuel rods (5) into a bundle in a nuclear reactor fuel assembly are arranged in a suitable spaced relationship to each other along the bundle, and the cells are formed from tubular sleeves (1). Each one of these sleeves (1) offers a passage for one of the elements in order to fix the elements in relation to each other. Substantially half the number of sleeves (1) in a spacer (10), distributed evenly over the cross section of the bundle, are located in a first plane across the bundle and are joined to each other inside a first frame (11) surrounding the bundle, thereby forming a lattice of sleeves (1) and gaps (13). The remaining sleeves (1) of the spacer (10) are joined together inside a second frame (12) surrounding the bundle and are located in a second plane, separate from the first plane, across the bundle.

Abstract: A spacer for retaining parallel, elongated fuel rods includes a plurality of cells which are formed from tubular sleeves internally provided with fixed supports and at least one spring arranged opposite to the fixed supports. The spring is intended to make contact with a fuel rod inserted into the sleeve and is formed as a leaf spring which is cut out of the wall of the sleeve and which, when the sleeve is empty, is bent into the sleeve. The leaf spring is adapted, in tensioned position when the fuel rod is inserted into the sleeve, to be returned to a position substantially coinciding with the wall of the sleeve.

Abstract: Disclosed is a process for improving the efficiency of in vitro propagation and tissue cultivating by tissue culture of cultivated of plants which comprises treating the plants during micropropagation and/or subsequent planting with an aqueous solution of one or a mixture of substituted amides or one or a mixture of substituted diamides.

Abstract: The invention relates to a plant growth regulating composition which contains as active agent a compound of general formula (I) ##STR1## wherein R.sub.1 and R.sub.2 can be identical or different and can stand for hydrogen, a C.sub.1-4 straight or branched alkyl group, cyclohexyl, phenyl, chlorophenyl, alkylphenyl, benzyl or alkylbenzyl group, or R.sub.1 and R.sub.2 can together with the N atoms form a heterocyclic ring.The growing of plants can be stimulated and the green weight can be increased to a significant degree by the treatment carried out with the composition of the invention.

Abstract: The invention relates to new compositions for increasing the cold resistance of cultivated plants. These compositions contain as active ingredient at least one compound of the general formula (I), ##STR1## wherein n is an integer of 2 to 5 and R.sub.1, R.sub.2 and R.sub.3 each stand for hydrogen or C.sub.1-5 alkyl, or an acid addition salt thereof in an amount of 0.01 to 70% by weight, together with a conventional diluent and/or additive.The plants treated with the compositions according to the invention are more resistant to cold and frost.