摘要:
A system provides support for the use of summary catalog data structures. In particular, the system defines such summary catalogs as data structures and provides standardized methods for operating on the data structures. The summary catalogs provide a convenient and highly available mechanism for obtaining information regarding files in the system. The summary catalogs are closely tied to queries in that the summary catalogs store query results. The summary catalogs may be encapsulated into objects that hold selected properties that are derived from other objects in a query or may be formed by other mechanisms. Copies of a summary catalog may be kept consistent using replication that propagates changes. In addition, consistency of summary catalogs with the source objects from which they originated may be maintained.
摘要:
A distributed file system uses objects to model the behavior of components of the distributed file system. Each object has an associated logical path name and physical address. An aggregation of all the logical path names comprises a distributed name space which can be logically partitioned into domains. Each domain includes a domain folder object which maps logical path names of objects in the domain containing the domain folder object, into addresses in the distributed system where the objects are stored. The addresses of the objects are used to access the objects in order to retrieve information from the distributed system.
摘要:
A distributed file system uses objects to model the behavior of components of the distributed file system. Each object has an associated logical path name and physical address. An aggregation of all the logical path names comprises a distributed name space which can be logically partitioned into domains. Each domain includes a domain folder object which maps logical path names of objects in the domain containing the domain folder object, into addresses in the distributed system where the objects are stored. The addresses of the objects are used to access the objects in order to retrieve information from the distributed system.
摘要:
The mine prop headboard (10) is used to support an inflatable grout bag (44) and is located transversely on an end of an elongate mine prop (12) which is in use installed upright between a hanging wall and a footwall in a mine working. The headboard includes a chock assembly which is composed of parallel, elongate timber chocks (14). A steel reinforcement sheet is secured to and extends over the support surface of the chock assembly to provide tensile reinforcement a grout bag is placed on the headboard and is inflated with grout under pressure sufficient to apply a compressive axial force to the prop between the hanging wall and the footwall.
摘要:
Certain embodiments of the present invention employ insect-attracting liquid mixtures, solid mixtures, liquid solutions, and solid solutions that include two or more insect-attracting substances or compounds with different physical characteristics that lead to multi-component plumes comprising component plumes with different radii and multiple chemical gradients. Additional embodiments of the present invention include multi-component insect-attracting substances that effectively target two or more different types of insects that together comprise a target group of insects, and additionally target a particular sex, in certain embodiments, or both sexes, in other embodiments, of the target insects. Many of the insect-attracting-substance embodiments of the present invention, upon controlled vaporization or release, create a multi-component, three-dimensional plume that leads insects to the source of the plume along multiple chemical-concentration gradients. The insect-attracting-substance embodiments of the present invention can be incorporated within lures, traps, and other devices and more complex substances related to insect attraction. In one embodiment of the present invention, a multi-component insect-attracting substance comprises a combination of raspberry ketone and methyl eugenol that is effective, contrary to prior expectations and results, for attracting both oriental fruit flies and melon flies.
摘要:
The yieldable load support comprises a compressible support member in the form of an elongate timber pole. The load support or pole is asymmetrically modified at or near one end thereof in a manner to positively induce sideways brushing of the pole at the modified end, in a preferential direction transverse to the length of the pole, when the support member is placed under longitudinal compressive load of sufficient magnitude.
摘要:
Various embodiments of the present invention are directed to insect-attraction apparatuses and methods of fabricating and using such apparatuses. One embodiment of an insect-attraction apparatus includes a lure containing an insect-attractive substance. The insect-attraction apparatus also includes a housing having a chamber, with the lure positioned inside the chamber. The chamber is partially defined by a bond between interior surfaces of the housing. When the bond is severed, the housing may be expanded to form a passageway that allows access to the lure.
摘要:
Embodiments of the present invention employ insect-attracting liquid mixtures, solid mixtures, liquid solutions, and solid solutions that include two or more insect-attracting substances or compounds with different volatilities. The insect-attracting-substance embodiments of the present invention, upon controlled vaporization or release, create a multi-component, three-dimensional plume that leads insects to the source of the plume along multiple chemical-concentration gradients. The insect-attracting-substance embodiments of the present invention can be incorporated within lures, traps, and other devices and more complex substances related to insect attraction.